UNIVERSITY OF MARIBOR

FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

ANNUAL REPORT RESEARCH ACTIVITIES 2003

MARIBOR, APRIL 2004 UNIVERSITY OF MARIBOR FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE Smetanova ulica 17, 2000 MARIBOR SLOVENIA Phone: +386 2 220 70 00 Fax: +386 2 251 11 78 http://www.feri.uni-mb.si

ANNUAL REPORT Research activities 2003

Editors: Dr. Danilo Korže and Prof. Dr. Borut Žalik Copy edit: George Yeoman, MA Database design: Štefan Masič Word-processing converter design: Dr. Danilo Korže Photos and text processing: Dr. Danilo Korže Photos: Gerhard Angleitner, MSc Typography and cover design: Dr. Miha Završnik and Repro studio OK, d. o. o., Maribor

ISSN 1408-6328

Published by: Faculty of Electrical Engineering and Computer Science, Maribor Print: Publishing and Printing Dept. of Technical Faculties of Maribor Number of copies: 250 Year of publication: April 2004

CONTENTS

FOREWORD ...... FW – 4

Study Programs, Options and Concentrations ...... FW – 5

Student Research Grants ...... FW – 16

Graduates of the Faculty of Electrical Engineering and Computer Science ...... FW – 17

Masters and PhD Degrees ...... FW – 18

Research by Institutes and Laboratories ...... FW – 24

Programme Units ...... FW – 26

INSTITUTE OF AUTOMATION ...... AU – 1

Systems and Control Laboratory ...... AU – 4

Signal Processing and Remote Control Laboratory ...... AU – 13

Process Automation Laboratory ...... AU – 19

Measurements Laboratory ...... AU – 27

Electro–Optical and Sensor Systems Laboratory ...... AU – 35

INSTITUTE OF ELECTRONICS ...... EL – 1

Digital and Information Systems Laboratory ...... EL – 4

Electronic Systems Laboratory ...... EL – 12

Microcomputer Systems Laboratory ...... EL – 16

Digital Signal Processing Laboratory ...... EL – 24

INSTITUTE OF POWER ENGINEERING ...... PE – 1

Electrical Machines Laboratory ...... PE – 4

Power Engineering Laboratory ...... PE – 9 Electromechanical Systems Control Laboratory ...... PE – 28

Fundamentals and Theory of Electrotechnics Laboratory ...... PE – 35

Applied Electromagnetics Laboratory ...... PE – 39

INSTITUTE OF ROBOTICS ...... RO – 1

Power Electronics Laboratory ...... RO – 4

Industrial Robotics Laboratory ...... RO – 7

Kinematics and Simulations Laboratory ...... RO – 20

INSTITUTE OF MATHEMATICS AND PHYSICS ...... MP – 1

Applied Mathematics Laboratory ...... MP – 3

INSTITUTE OF COMPUTER SCIENCE ...... CS – 1

Computer Graphics and Artificial Intelligence Laboratory ...... CS – 5

Computer Architecture and Languages Laboratory ...... CS – 8

System Design Laboratory ...... CS – 15

System Software Laboratory ...... CS – 24

Heterogenous Computer Systems Laboratory ...... CS – 33

Geometric Modelling and Multimedia Algorithms Laboratory ...... CS – 40

INSTITUTE OF INFORMATICS ...... IN – 1

Information Systems Laboratory ...... IN – 4

Database Technologies Laboratory ...... IN – 19

Computer Mediated Communication Laboratory ...... IN – 28

Real–Time Systems Laboratory ...... IN – 31

INSTITUTE OF MEDIA COMMUNICATIONS...... MC – 1

INSTITUTE OF TELECOMMUNICATIONS...... TC – 1 Faculty of Electrical Engineering and Computer Science FW – 1 ence in the front (a view from west side)

Buildings of the Faculties Engineering University Maribor Buildings of the Faculties Engineering University Maribor Faculty of Electrical Engineering and Computer Sci

Photo: Gerhard Angleitner FW – 2 Faculty of Electrical Engineering and Computer Science

Faculty of Electrical Engineering and Computer Science Dean: Prof. Dr. Igor Tičar

Institute of Institute of Automation Computer Science Head: Head: Prof. Dr. Karel Jezernik Prof. Dr. Viljem Žumer

Institute of Institute of Electronics Informatics Head: Head: Prof. Dr. Bogomir Horvat Prof. Dr. Ivan Rozman

Institute of Institute of Power Robotics Engineering Head: Head: Prof. Dr. Karel Jezernik Prof. Dr. Ivan Zagradišnik

Institute of Institute of Institute of Mathematics and Telecommunications Media Physics Head: Communications Head: Prof. Dr. Bogomir Horvat Head: Prof. Dr. Vitodrag Assoc. Prof. Dr. Tatjana Kumperščak Welzer-Družovec Faculty of Electrical Engineering and Computer Science FW – 3

Prof. Dr. Ivan Rozman Prof. Dr. Igor Tičar Dean prior to July 13, 2003 Dean since July 13,2003

Prof. Dr. Zmago Brezočnik Deputy Dean of Education

Prof. Dr. Damjan Zazula Prof. Dr. Borut Žalik Deputy Dean of Research Deputy Dean of Research prior to Sept. 23, 2003 since Sept. 23, 2003 FW – 4 Faculty of Electrical Engineering and Computer Science

FOREWORD

Physical and mental limits are both falling. The Faculty of Electrical Engineering and Computer Science is facing a crucial era – we will become a part of the European university and research area. Our Faculty arose from the needs of the local economy, it has been educating skilled workers for this economy, and searching for solutions to technical problems together with those involved in it. At the same time, the Faculty has grown. It has set itself higher and more ambitious aims. It has become more and more open to the world, to problem areas and their solutions. Today, we are stepping into an integrated world based on knowledge and creativeness. Our researchers are making contacts with related European and World Faculties and Institutes. They participate in various European projects and publish their research results in the most respected scientific journals. We realize that science is unique, and it has to be constantly subjected to international struting. Our professors, researchers, postgraduate students and their mentors know that science does not accept linguistic barriers and national frameworks. It requires continuous acquaintance with innovation and hard work. At the Faculty of Electrical Engineering and Computer Science, we carry out our mission over various scientific fields. We are organised as nine institutes: Institute of Automation, Institute of Electronics, Institute of Informatics, Institute of Mathematics and Physics, Institute of Media Communications, Institute of Power Engineering, Institute of Computer Science, Institute of Robotics, and Institute of Telecommunications. Besides scientific research activities, the institutes also cover all study options of the academic-degree and professional higher education degree study programmes. The institutes consist of laboratories which are responsible for their individual research fields. The Institute of Media Communications and Institute of Telecommunications are new. They are under the aegis of the Institute of Informatics and Institute of Electronics. Scientific research work is a preliminary condition for the education of those new innovatory engineers, Masters, and Doctors of Science needed by our economy. Our graduates, Masters and Doctors, prove that our work is successful. They are respected both at home and abroad. Young people are more and more aware of this. Namely, large numbers of new undergraduates of both sexes decide to study at our Faculty each year. The majority of them punctiliously tackle study because they are aware that tecnical language is universally and widely applicable in the world market. We incorporate many students of mature years into the research work of our laboratories. Here, they inhance their theoretical knowledge by practical work, and they gain further experience and strengthen their engineering acumen to become a creative engineer and researcher. I am convinced that the Faculty of Electrical Engineering and Computer Science will advance even more in the European arena, and it will become a recognized member of the family of European technical faculties. In this way, it will assure its own future and the future of our graduates.

Dean Prof. Dr. Igor Tičar Faculty of Electrical Engineering and Computer Science FW – 5

STUDY PROGRAMMES, OPTIONS AND EMPHASIS

Undergraduate studies The Faculty of Electrical Engineering and Computer Science offers two separate types of study programmes, each leading to a different type of degree: academic and professional. Four study programmes with several options are offered towards the academic degrees and two study programmes towards professional degrees. The academic-degree study programme in Electrical Engineering includes the following options: • Automation with concentration on: - Production Automation - Process Automation • Electronics with concentration on: - Computer Electronics - Telecommunications Electronics • Power Engineering with concentration on: - Power Engineering - Electromechanical Systems Control - Electromagnetics • Mechatronics with concentration on: - Communications - Regulations - Instrumentation - Actuation - Embedded Systems - Programmable Tracking Systems The option of Mechatronics is interdisciplinary, supported by the Faculty of Electrical Engineering and Computer Science and by the Faculty of Mechanical Engineering. The computer science students are also eligible for this option after completing the first two years in computer science. Academic-degree studies last nine semesters and include lectures, exercises, and practical placements in industry, with the exception of Mechatronics where the duration is eight semesters. The first two years are the same for all options. The professional higher education programme in Electrical Engineering comprises the following options: FW – 6 Faculty of Electrical Engineering and Computer Science

• Automation with concentration on: - Process Automation - Robotics • Electronics with concentration on: - Industrial Electronics - Computer Electronics • Power Engineering with concentration on: - Power Engineering - Electromechanical Systems Control - Electromechanical Devices Construction • Telecommunications The professional higher education programmes last six semesters consisting of lectures and exercises, and an additional semester of practical placements in industry. The first year of studies is common for all options. Electrical engineering is also offered as a combined interdisciplinary academic-degree study as electrical engineering with economics. It is organised by the Faculty of Electrical Engineering and Computer Science and by the Faculty of Business and Economics in Maribor. The duration of studies is eight semesters with about 2/3 major subjects given in electrical engineering and 1/3 in business and economics. Graduates of electrical engineering with economics are qualified to proceed with their studies towards Masters or PhD degrees either in electrical engineering or in business and economics. The academic-degree study programme in Electrical Engineering with Economics includes the following options: • Automation • Electronics • Power Engineering Faculty of Electrical Engineering and Computer Science FW – 7

Electrical Engineering Studies

Academic degree studies Studies to professional higher education degrees

PhD

g 3rd and 4th Year

f

Masters degree studies - Electrical Engineering e - Electronic Vacuum Technology

2nd Year d 1st Year

Academic degree Professional higher education degree

Undergraduate studies Undergraduate studies 6 semesters of studies and 1 - Automation (9 semesters) semester of practice in industry - Electronics (9 semesters) - Automation - Power Engineering (9 semesters) - Electronics - Mechatronics (8 semesters) - Power Engineering - Telecommunications

Matura Examination (an external examination) or Proffessional Matura or Matura Professional Matura and additionally Examination an examination in one of the matura (an internal examination) subjects (5th subject) FW – 8 Faculty of Electrical Engineering and Computer Science

The academic-degree study programme in Telecommunications consists of two years of study with common fundamental subjects and two additional years with a variety of choises. Therefore, the studies last eight semesters and include lectures, exercises, and practical placements in industry.

Telecommunications Studies

Academic degree studies

PhD

g 3rd and 4th Year

f Masters degree studies e

2nd Year

d

1st Year

Academic degree

Undergraduate studies 8 semesters

Matura Examination (an external examination) or Professional Matura and additionally an examination in one of the matura subjects (5th subject)

Faculty of Electrical Engineering and Computer Science FW – 9

The academic-degree study programme in Computer and Information Science includes the following options: • Software with concentration on: - Systems - Engineering Informatics • Information Science with concentration on: - Business Information Systems - Process Information Systems Academic-degree studies last nine semesters and include lectures, exercises, and practical placements in industry. The first two years are the same for all options. After the first two years in computer science studies, students can continue with the mechatronics option within the electrical engineering programme. The professional higher education programme in Computer and Information Science comprises the following options: • Software • Information science • Logic and systems Professional higher education programmes last six semesters consisting of lectures and exercises and an additional semester of practical placements in industry. The first year of studies is common for all options.

FW – 10 Faculty of Electrical Engineering and Computer Science

Computer and Information Science Studies

Academic degree studies Studies to professional higher education degrees

PhD

g 3rd and 4th Year

f Master degree studies e - Computer and Information Science

2nd Year

d 1st Year

Academic degree Professional higher education degree

Undergraduate studies Undergraduate studies 9 semesters 6 semesters of studies and 1 semester of - Software practice in industry - Informatics Science - Logic and Systems - Software - Informatics Science Matura Examination (an external examination) or Professional Matura and additionally an examination in one of the matura Professional Matura or Matura Examination (an external examination) Matura Examination

Faculty of Electrical Engineering and Computer Science FW – 11

In the academic year 2002/03 the Faculty of Electrical Engineering and Computer Science of Maribor started a new academic studies programme in Media Communications. The first two years are common, while in the third year the students are able to specialise in one of two options: • RTV Production and • Interactive Graphic Communication. The total duration of studies is eight semesters. The title received after a successful completion of diploma work will be a University Diploma in Media Communicology. FW – 12 Faculty of Electrical Engineering and Computer Science

Media Communications

Academic degree studies

PhD g 3rd and 4th Year

f

Masters degree studies e

2nd Year d 1st Year

Academic degree

Undergraduate studies 8 semesters - RTV Production - Interactive Graphic Communication

Matura Examination (an external examination) or Professional Matura and additionally an examination in one of the matura subjects (5th subject)

Faculty of Electrical Engineering and Computer Science FW – 13

Graduate Studies

Graduate studies are basically aimed at the acquisition of in-depth theoretical and applied knowledge enabling the prospective graduate to carry out independent and creative research in various technical sciences.

Masters degree and PhD studies

In 2003, masters degree and doctoral studies were organised as shown in the preceding diagrams in combination with the undergraduate schemes. It was enhanced with additional subjects. All the subjects were also grouped into two subsets: the smaller one contains majors according to different study options, while the bigger group comprises choises. Every student must select at least two majors belonging to his or her study option.

Three graduate programmes are currently being offered:

Electrical Engineering

Electronic Vacuum Technology

Computer and Information Science

Their supervisor selects the following for every graduate student entering the first year of studies: • the courses that the student will attend and the exams the student will complete • a research project that will be individually assigned to and conducted by the student The student must collect a minimum of 120 credits during the first two years. Out of this total, 75 credits must be awarded for the examinations, while 45 credits must be awarded for the reports completed on their individual research projects. The student is awarded 15 credits for every passed exam and publicly presented report on individual research projects.

Terms for Progress The terms of reference for the postgraduate studies are specified by the Statute of the University of Maribor and by annual public scruting. Other student obligations are depicted by labels d through g in the graphical presentation of academic-degree studies. d―Minimum of 30 credits. e―The student must pass all the exams during the first two years and present the reports on their individual research work with a minimum average grade of 9 (out of 10). FW – 14 Faculty of Electrical Engineering and Computer Science

According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 2 points, based on their scientific research activities. Additionally, a recommendation letter from the student's doctoral studies supervisor is requested. f―According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 2 points, based on their scientific research activities. g―During the third year of study, students must report twice on their research work, and once during the fourth year. This totals in 45 credits. Additionally 75 credits must be awarded for a successful presentation and defence of doctoral dissertation. According to the “Regulation of Habilitation Procedure for University Teachers, Scientific Workers and Co-workers” valid at the Faculty of Electrical Engineering and Computer Science, the student's bibliography must be awarded a minimum of 5 points, based on their scientific research activities. At least 1 point must be awarded for publishing research findings in the journals cited in the INSPEC database. Masters degree studies are research oriented and include an introduction to research, the development of students’ capacities for research work in individual scientific fields and disciplines, and the study of subjects providing the in-depth and broad knowledge of subjects needed for the preparation of a masters thesis. Throughout the programme of study, graduate students can use laboratories and the computer infrastructure of the Faculty of Electrical Engineering and Computer Science, as well as those of other engineering faculties at the university. Studies leading to Masters degrees grant the graduates a professional title of Master of Science in Electrical Engineering or Master of Science in Computer Science. PhD research is carried out in research laboratories; a more detailed description of these programmes is given in the continuation of this report. Research teams consisting of doctoral students and graduate students for individual areas of research are commonly formed. Some research teams include participants from several laboratories. International contacts developed through the teams are especially important for doctoral students, because this is the only way for them to take part in the international transfer of knowledge and exchange research achievements. Some of our doctoral students carry out part of their research abroad and even have co-mentors in other countries. We believe that creativity, openness, peer support, and reciprocity are the bedrock of any academic co-operation. Therefore the Faculty of Electrical Engineering and Computer Science regularly hosts foreign undergraduate, graduate, and postdoctoral students. Our new organisation Faculty of Electrical Engineering and Computer Science FW – 15 of doctoral studies also leads to a greater compatibility with other universities, making it easier for student exchange and mobility. FW – 16 Faculty of Electrical Engineering and Computer Science

STUDENT RESEARCH GRANTS The Faculty of Electrical Engineering and Computer Science has invited applications for individual student research projects for several years, and partially refunds material costs upon their realization. Undergraduate and postgraduate students of FERI are invited to apply for this subvention with their proposals for research projects within the research fields of FERI. These projects may not be refunded from other sources, and they may not be a part of the ordinary study obligations of the student. Two independent reviewers, members of the Commission for Scientific and Research Work at FERI, scrutinize each project.

In 2003, two invitations were offered. After the May invitation, 6 applications were submitted, and a further 4 proposals received after October invitation.

The following projects were approved: • Vid Domiter: Algorithm of Constrained Delaunay Triangulation, • Marko Kežmah: Interface between MATLAB-SIMULINK and MACRO Network, • Peter Bernard: Stationary INKJET Device, • Tadej Jelušič: Remote Laboratory, • Gregor Pačnik: Development of a Wheelchair with Speaking Control. • Damjan Vengušt and Marko Mehtsun: Interactive Walk through 3D Space (Inverse Kinematics in 3D Graphics by Aid of OpenGL), • Boštjan Pivec: Optimisation of Triangular Meshes.

The students will publicly present results of their research work through the approved projects. The best student project in the 2004 will be awarded on the occasion of the Faculty Annual Celebration in November 2004. Faculty of Electrical Engineering and Computer Science FW – 17

GRADUATES OF THE FACULTY OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

Two different types of graduate studies are available: those leading to academic degrees and studies leading to professional higher education degrees. The number of 2003 graduates is given in the table below.

2003 Graduates

Option Professional Undergraduate higher education academic degrees degrees Electrical Engineering 85 31 Computer and Information Science 17 16 Electrical Engineering with Economics - 9

FW – 18 Faculty of Electrical Engineering and Computer Science

MASTERS AND PhD DEGREES

14 masters degree students successfully defended their Masters theses and 12 PhD students their dissertations. 2003 Masters theses

Author Title Date of defence COBISS number Mentor Co-mentor

Edvard CIBULA Miniaturni optični merilnik tlaka za bio-medicinske aplikacije May 6, 2003 (Miniature optic pressure sensor for biomedical applications) 7918358 Dr. Denis Đonlagić Dr. Boris Tovornik

Maria Alejandra DA GRAZA Programski agenti in uporaba Jade okolja ERAZO (Software agents and employment of Jade agent framework) Mar. 18, 2003 Dr. Bogomir Horvat Dr. Tatjana Welzer Družovec

Matjaž DIVJAK Sledenje 3D gibanju s stereokamero Mar. 12, 2003 (3D motion tracking using a stereocamera) 7816214 Dr. Damjan Zazula Dr. Nikola Guid

Marjana HERIČKO Izbira integracijskih mehanizmov pri zagotavljanju informacijske podpore poslovnim procesom May 19, 2003 (Selecting integration mechanisms in providing information support to business processes) 8026390 Dr. József Györkös Dr. Tatjana Welzer Družovec

Branko HORVAT Spletno rudarjenje in personalizacija April 16, 2003 (Web mining and personalization) 7963926 Dr. Milan Ojsteršek Dr. Viljem Žumer Faculty of Electrical Engineering and Computer Science FW – 19

Author Title Date of defence COBISS number Mentor Co-mentor

Aleksander KRAŠOVEC Vrednotenje algoritmov distančne zaščite podprto s simulacijo elektroenergetskih sistemov June 20, 2003 (Evaluation of algorithms for distance protection supported with simulation of power system) 8135958 Dr. Bojan Grčar Dr. Drago Dolinar

Boris KREMER Optimizacija proizvodnje električne energije na dereguliranem trgu Oct. 10, 2003 (The optimal generation of electricity on the deregulated market) 8422166 Dr. Drago Dolinar Dr. Bojan Grčar

Mihael KRIŠELJ Razvoj enofrekvenčnih radiodifuznih omrežij v Sloveniji – možnosti in omejitve Oct. 28, 2003 (Perspectives of spatial development of digital audio broadcasting in Slovenia) Dr. Bogomir Horvat

Bogdan LIPUŠ Modeliranje in upodabljanje oblakov May 19, 2003 (Clouds modeling and rendering) 7935510 Dr. Nikola Guid Dr. Borut Žalik

Jasmin MALKIĆ Sistem za avtentikacijo v javnih omrežjih June 12, 2003 (Authentication system in the public networks) 7964950 Dr. Tatjana Welzer Družovec Dr. Ivan Rozman

FW – 20 Faculty of Electrical Engineering and Computer Science

Author Title Date of defence COBISS number Mentor Co-mentor

Igor NASTOSKI Vmesniški agent Katia – posrednik med uporabnikom in operaterji telekomunikacijskih storitev Mar. 18, 2003

7797782 Dr. Bogomir Horvat Dr. Tatjana Kapus

Ervin SCHAFFRANIETZ Objektno-relacijsko preslikovalno ogrodje za izdelavo porazdeljenih aplikacij Jan. 17, 2003 (An object-relational mapping framework for distributed systems development) 7964182 Dr. Milan Ojsteršek Dr. Viljem Žumer

Andrej TARANENKO Evolucijski algoritmi za posplošena barvanja grafov Dec. 10, 2003 (Evolutionary algorithms for generalized graph colorings) Dr. Marjan Mernik Dr. Aleksander Vesel

Zvonko TOROŠ Izboljšanje zanesljivosti delovanja sistema elektro Primorske Mar. 20, 2003 (Improvement of system's reliability at elektro Primorska) 7938070 Dr. Jože Pihler Dr. Jože Voršič

Faculty of Electrical Engineering and Computer Science FW – 21

2003 PhD theses Author Title Date of defence COBISS number Mentor Co-mentor

Izidor GOLOB Povečanje kakovosti informacij z integracijo informacijskih komponent Nov. 28, 2003 (Information quality improvement by information components integration) Dr. Tatjana Welzer Družovec Dr. Ivan Rozman

Vladimir HOZJAN Podatkovno vodeno modeliranje emocij z nevronskimi mrežami v emocionalni sintezi govora Dec. 5, 2003 (Data driven emotion modelling with neural networks for emotional speech synthesis) 128273408 Dr. Zdravko Kačič

Bojan JARC Povečanje robustnosti sistemov avtomatskega razpoznavanja govora s statistično oceno spektra govornega Mar. 25, 2003 signala (Improvement of noise robust automatic speech recognition with statistical model-based spectrum estimation method) 8033302 Dr. Zdravko Kačič

Iztok KRAMBERGER Določanje položaja kožnih formacij pri taktilni komunikaciji v navideznih vmesnikih April 8, 2003 (Definition of skin formations for tactile communication in virtual interfaces) 125105152 Dr. Zdravko Kačič

Sebastian KRIVOGRAD Stiskanje trikotniških mrež s sočasnim procesiranjem parov trikotnikov Oct. 16, 2003 (Compression of triangular meshes by simultaneously processing pairs of triangles) 127771904 Dr. Borut Žalik Dr. Nikola Guid FW – 22 Faculty of Electrical Engineering and Computer Science

Author Title Date of defence COBISS number Mentor Co-mentor

Marko LAMOT Triangulacija enostavnega mnogokotnika z enakomerno delitvijo ravnine June 4, 2003 (Simple polygon triangulation based on uniform plane subdivision)

125159424 Dr. Borut Žalik Dr. Nikola Guid

Mitja LENIČ Multimetodna gradnja klasifikacijskih sistemov Dec. 3, 2003 (Multimethod construction of classifier systems) Dr. Peter Kokol Dr. Bruno Stiglic

Matej ROJC Časovno in pomnilniško optimalna struktura večjezičnega in poliglotskega sintetizatorja govora – arhitektura s končnimi June 20, 2003 stroji (Time and space optimal solution for multilingual and polyglot text-to-speech synthesis system - architecture based on finite-state machines)

8093462 Dr. Zdravko Kačič

Janez STERGAR Napovedovanje prozodičnih parametrov za samodejno tvorjenje slovenskega govora April 4, 2003 (Prediction of prosodic paramethers for automatic synthesis of slovenian speech)

8085526 Dr. Bogomir Horvat

Matej ŠALAMON Problem neponovljivosti simulacij električnih vezij Oct. 22, 2003 (Problem of non-repeatability of the circuits simulation) 25470981 Dr. Tomaž Dogša

Faculty of Electrical Engineering and Computer Science FW – 23

Author Title Date of defence COBISS number Mentor Co-mentor

Alenka VESEL Raziskave karakteristik magnetronske razelektritve v ultravisokem vakuumu Nov. 4, 2003 (Investigation of characteristics of a magnetron discharge in a ultrahigh vacuum)

126941184 Dr. Anton Zalar

Andrej ŽGANK Podatkovno vodena metoda prenosa izvornih večjezičnih akustičnih modelov razpoznavalnika govora na nov jezik Dec. 5, 2003 (Data driven method for the transfer of source multilingual acoustic models to a new language)

128273664 Dr. Bogomir Horvat

FW – 24 Faculty of Electrical Engineering and Computer Science

RESEARCH BY INSTITUTES AND LABORATORIES

The Faculty of Electrical Engineering and Computer Science is registered with the Ministry of Science and Technology as a research organisation incorporating 14 research units. 1. Computer Architecture and Languages Laboratory Research unit head: Prof. Dr. Viljem Žumer The research unit consists of the Computer Architecture and Languages Laboratory and the Heterogeneous Computer Systems Laboratory staff.

2. Institute of Electronics Research unit head: Prof. Dr. Bogomir Horvat The research unit consists of the staffs of the Digital and Information Systems Laboratory, Electronic Systems Laboratory, Microcomputer Systems Laboratory, and Digital Signal Processing Laboratory.

3. Institute of Automation Research unit head: Prof. Dr. Karel Jezernik The research unit consists of the staffs of the Systems and Control Laboratory, Signal Processing and Remote Control Laboratory, Process Automation Laboratory, Measurements Laboratory, and Electro-Optical and Sensory Systems Laboratory.

4. Institute of Robotics Research unit head: Prof. Dr. Karel Jezernik The research unit consists of the staffs of the Power Electronics Laboratory, Industrial Robotics Laboratory, and Kinematics and Simulations Laboratory.

5. Applied Electromagnetics Research unit head: Assoc. Prof. Dr. Mladen Trlep The research unit consists of the staffs of the Applied Electromagnetics Laboratory and Fundamentals and Theory of Electrotechnics Laboratory.

6. Electrical Machines Laboratory Research unit head: Prof. Dr. Ivan Zagradišnik The research unit consists of the Electrical Machines Laboratory staff. Faculty of Electrical Engineering and Computer Science FW – 25

7. Electromechanical Systems Control Laboratory Research unit head: Prof. Dr. Drago Dolinar The research unit consists of the Electromechanical Systems Control Laboratory staff.

8. Computer Graphics and Artificial Intelligence Laboratory Research unit head: Prof. Dr. Nikola Guid The research unit consists of the Computer Graphics and Artificial Intelligence Laboratory staff.

9. Institute of Information Science Research unit head: Prof. Dr. Ivan Rozman The research unit consists of the staffs of the Information Systems Laboratory, Database Technologies Laboratory, Computer Mediated Communication Laboratory, and Real-Time Systems Laboratory.

10. Systems Software Laboratory Research unit head: Prof. Dr. Damjan Zazula The research unit consists of the System Software Laboratory staff.

11. Power Engineering Laboratory Research unit head: Assoc. Prof. Dr. Jože Voršič The research unit consists of the Power Engineering Laboratory staff.

12. Institute of Mathematics and Physics Research unit head: Prof. Dr. Vitodrag Kumperščak The research unit consists of the Applied Mathematics Laboratory staff.

13. System Design Laboratory Research unit head: Prof. Dr. Peter Kokol The research unit consists of the System Design Laboratory staff.

14. Geometric Modelling and Multimedia Algorithms Laboratory Research unit head: Assoc. Prof. Dr. Borut Žalik The research unit consists of the Geometric Modelling and Multimedia Algorithms Laboratory staff. FW – 26 Faculty of Electrical Engineering and Computer Science

PROGRAMME UNITS

Since 1998, the Faculty of Electrical Engineering and Computer Science has been registered with the Ministry of Education, Science, and Sport as a research organisation incorporating 9 programme units. Since 2000, financial support has been given to the units according to the obtained results, which must be presented in annual reviews of their scientific contributions and technical and expert contents. In 2003, seven programme units were given full financial support, whereas one unit had only partial funding. Short overviews for 2003 are gathered in the sequel.

1. Information Systems Programme unit head: Prof. Dr. Ivan Rozman This programme unit consists of the staffs of the Information Systems Laboratory, Real-Time Systems Laboratory and Database Technologies Laboratory. Scientific disciplines: Artificial Intalligence, Computer Science, Computer Technology, Control, Informatics, Numerical Analysis, Operations Research, Programming, Statistics, Systems, Systems Engineering, Systems Theory. Scientific and research work of the Information Systems programme unit is directed towards comprehensive coverage of the information systems development field. It addresses several mutually interrelated domains: methodological aspects of information systems development; databases and data warehouses; quality assurance strategies; automation of inter-organizational business processes; real-time systems development and design; reliability assurance and safety- critical aspects of embedded systems; specification of model driven service oriented architectures; efficiency improvement of process and architectural models; information systems integration methods; use of intelligent systems and agents to enhance efficiency of information systems; security aspects of information systems development; specification of effective data and database security verification methods; improvement of classification algorithms for the needs of data warehouse designs and introduction of integrability aimed at information quality enhancement. Methodological aspects of information systems development address the introduction of new, highly effective techniques, methods and methodologies for business process modelling, requirements specification, architectural design, and information systems implementation, verification and validation. The emphasis is given to object-oriented and component-oriented approaches, as well as on service oriented architectures with an added semantic component and contextually-dependent, aspect-dependent performance. This therefore addresses the connectivity and integration of information services and reuse, which will be formalized on higher abstraction levels (ideas, patterns, frameworks, components and heuristics) by introducing appropriate repositories, locating mechanisms, traceability assurance, identification and application of solutions. Methodological research lays a firm foundation for the definition of methods and mechanisms for the automation of inter-organizational business processes, primarily those involving several corporations, but also the ones with various consumers and employees. The definitions stress the Faculty of Electrical Engineering and Computer Science FW – 27 unified presentation layers, negotiations and location mechanisms. The ultimate goal is to enable automation on all levels, from the definition of business processes and cooperation profiles to electronic contract composition and operation derivation. Special attention is devoted to the consideration and active formulation of European Union standards, with the main focus on SEEM (Single European Electronic Market), as well as the introduction of methods for applying theory to real projects in the Slovenian region, and to security aspects covered by effective verification methods. The programme unit continues with research on new approaches to introduce and improve quality assurance systems applied to the informatics field, and with specification of formal methods for programme processes modelling, which comprises research in the field of quantitative evaluation of programme processes and data quality. Models of automatic process calibration will be defined, which will be based on measurable criteria and on the employment of multi-criteria decision methods. Research in the field of real-time systems design includes the requirements analysis and design of embedded systems architectures, development of a real-time operating systems' kernel, specification of high-level programming languages characteristics, and completion of the existing compiler and tools for embedded systems design, graphical application design and verification/validation of real-time applications. Special attention is focused on the study and implementation of measures to enhance the robustness of embedded systems and their resistance to errors. Further notable consideration is given to the development of platform-independent, mapping- independent service distributed architectures. In this context, a model based definition of the architecture will be addressed, which overcomes problems regarding the heterogeneity of programme platforms and their rapid development. Within the scope of scientific work that covers the data view on information systems (databases, data warehouses, data mining), the research concentrates on the processes for the production and improvement of information, with regard to structured data analysis and the development process on the level of a closed organizational system. In relation to data mining, the incompleteness of classification mechanisms is addressed. Within the scope of knowledge-based systems research, the programme unit carries on with the development of models to support more effective project management. Several methods have been defined and evaluated, which are based on the principles of fuzzy logic, intelligent agents, operations research and artificial intelligence. The development rests on semantic extensions of service architectures and on the implementation of artificial intelligence methods, above all automatic programming. The latter enables, conjointly with the use of complexity theory, the identification of new software reliability laws and more efficient extraction of knowledge from data. FW – 28 Faculty of Electrical Engineering and Computer Science

2. Methods in Communications Programme unit head: Prof. Dr. Zdravko Kačič This programme unit consists of the staffs of the Microcomputer Systems Laboratory, Digital Signal Processing Laboratory, Electronic Systems Laboratory and Digital and Information Systems Laboratory. Scientific disciplines: Signal Processing, Telecommunication Engineering. The use of linear discriminant analysis (LDA) enabling the reduction of MFCC feature vector dimension and increased accuracy of automatic speech recognition, when single states of monophone HMM models were selected as discriminant classes of LDA. A new feature extraction algorithm was developed using wavelet packet decomposition and autoregressive modelling. Modified soft wavelet coefficient clipping was applied to reduce the level of additive noise. The clipping threshold was defined using the minimum statistics principle. Feature vector length was reduced by modified PCA analysis with two PCA transform matrices and a voiced/unvoiced speech detector. An improvement in speech recognition accuracy was achieved compared to the standard feature extraction methods using the developed methods. A voice activity detection algorithm was developed based on frequency spectrum autocorrelation that emphasises the characteristics of the spectrum especially in the voiced speech regions. A hangover criterion was used for unvoiced speech that prevents the clipping of unvoiced speech at the end of a speech segment. The linear estimator of speech spectrum was defined based on a Gaussian statistical model. A new algorithm for a modified linear estimator was developed that improves speech recognition accuracy. As speech is not always present in the signal a new speech/pause detector was developed based on non-linear probability rationed function, which further improves recognition accuracy. Speech recognition architecture was developed using the confidence measure. In the defined test- bed (Slovenian SpeechDat II database) the system successfully rejected 75% of out of vocabulary (OOV) words and achieved a CER error rate of 12,5% (accuracy increased by 30% absolute in comparison with the system without confidence measure). Additional reduction of CER error by 2.2% absolute was achieved with a non-linear classifier based on a neural network. Furthermore, the recognition accuracy of a large vocabulary speech recognition system using sub-word language models (stem-endings) was evaluated. The OOV ratio was reduced using these models. In the case of a speech recognition system with a vocabulary size of 40000 words, the OOV ratio was reduced to 2%. The coverage of the test set was increased by 15% and the recognition rate was also increased (by a maximum of 7%). The heuristic function used in a word splitting algorithm was improved for building language models. We showed that the optimisation of training text set entropy leads to an increased number of different entries in the text corpus. A new method for the generation of data driven phonetic classes was defined, which is used in the tree-based clustering of acoustic models in multilingual speech recognition. Usually the phonetic classes are defined by experts, which introduces subjective influence, whereas the criterion used is based on listening and not on statistical acoustic similarity, which is the main criterion used in automatic Faculty of Electrical Engineering and Computer Science FW – 29 speech recognition. Better results can be achieved and subjective influence is avoided with the proposed data driven method based on a phoneme confusion matrix. This new method is particularly suitable for multilingual acoustic modelling, as it is possible to avoid problems when all the languages are not included in the phonetic classes. In the area of cross-lingual speech recognition further improvement of data driven method for porting acoustic models to target language was performed, as the data driven methods are usually better than expert based methods. An analysis of the LentInfo system field-trial test was performed. First, an analysis on the level of speech recogniser was carried out, followed by an analysis on the level of sub-dialogue and dialogue that was managed by the dialogue manager module. A real-time large vocabulary (20000 words) for a continuous speech recognition system was developed for the Slovenian language of a limited domain. This system was demonstrated at the TELEInfos fair 2003 in Ljubljana. We demonstrated the suitability of this approach for the analysis of synchronous sequential circuits of similar complexity by using a proprietary approach for the specification and verification of circuits with the SDL and ObjectGEODE on a standard example of traffic light controller.

3. Electromechanical Systems Control Programme unit head: Prof. Dr. Drago Dolinar This programme unit consists of the staff of the Electromechanical Systems Control Laboratory. Scientific disciplines: Automation, Electrical Engineering, Electromagnetism, Mathematical and General Theoretical Physics, Robotics. The research programme is composed of two topics. The research objective of the first topic is the development of new dynamic models of electromechanical devices, development of new methods for parameter determination and design of new systems for the control of electromechanical devices. The first subject under investigation was the modelling and control design of high performance drive with a Linear Synchronous Reluctance Machine (RSLM). A nonlinear dynamic model of the LSRM has been developed, verified and validated. This model contains a magnetically nonlinear and anisotropic model of the LSRM iron core, and the position and current dependent characteristics of the thrust and friction force. All required characteristics have been determined experimentally. Furthermore a control for the permanent synchronous machine working in a field-weakening region was designed and a method of higher harmonics compensation was proposed. The developed solutions were dynamic, therefore, the perfect tracking of the reference position trajectory is assured even in a field-weakening region. An experimental system of active magnetic bearings (AMB) was developed within the framework of the applied research programme. The design of AMB was achieved in cooperation with Professor K. Hameyer of the KU Leuven, ESAT/ELEN, while the design of the rotor (system) shaft FW – 30 Faculty of Electrical Engineering and Computer Science was achieved in cooperation Professor W. Heylen of the KU Leuven, MECH/PMA. The development of the power supply, electronics and the control is based on our knowledge and experiences. Magnetic bearing force was measured (in order to determine the mathematical model) by analytical continuous functions. A control design was implemented based on the derived mathematical model. The improvement was established in the static and dynamic system performances. We were involved in the design, as well as the manufacturing of the experimental system. The modular type of realization and the user friendly control desk make it possible to use the system in applied and theoretical research as well as for educational purposes. The research objective of the second topic is dynamic power system modeling, and both control and unit protection. We claim that network modeling can be performed equally based on instantaneous state variables or by using dynamic phasor quantities. Analytical tools have been developed for the interaction of power system transients with a protection operation. The testing phase includes new protection algorithms based on analytical signal processing methods applied to the power transformers and transmission lines. The transformer turn-to-turn faults are within the focus of our current research. This fault type represents a great challenge for existing relays since they are unable to recognize turn-to-turn faults in the early development stage. We hope to firstly develop an appropriate model describing this fault type with sufficient accuracy based on the great number of measured samples on the laboratory power transformer. Obtained deeper knowledge will be used later to improve the sensitivity of the protection algorithms.

4. Automation Programme unit head: Assoc. Prof. Dr. Boris Tovornik This programme unit consists of the staff of the Process Automation Laboratory and Electro- Optics and Sensor Systems Laboratory. Scientific disciplines: Automation, Instrumentation Technology, Robotics. In 2003 we continued our research work in the field of industrial automation by developing new methods for the fault diagnosis of technical systems. The system under consideration is controlled by PLC and supervised by the SCADA system and the procedure for fault diagnosis is designed with particular emphasis on industrial practice. The proposed solutions were investigated and verified by simulations and experiments. The model of an intelligent home is used for several tests using different approaches for control and connections between sub-systems. The model has been made based on LonWorks technology and it includes two rooms and a basement. The LonWorks network is connected via a Web Server and is also connected to a Supervisory Control and Data Acquisition System. The connection was made using OLE for Process Control, which provides the universality of the solution. A real-time connection could also be established for testing purposes using certain mathematical software, i.e. Matlab. We continued our work in the filed of low coherence interferometry, sensors for road traffic monitoring and with work in the field of biomedical optical sensors. During this year we usefully concluded the design and installation of the first seven prototypes of fiber optic axle detectors. The Faculty of Electrical Engineering and Computer Science FW – 31 installation was completed at a test polygon near Hoče. We tested Michelson interferometers, Sagnac interferometers and measurement systems based on direct time delay assessment. The first results demonstrated the feasibility of all three principles. We concluded the first development phase of a miniature optical pressure sensor prototype for bio-medical applications. The essential element is a thin polymer diaphragm that is positioned inside the hollow end of a standard optical fiber (125 µm in diameter), which forms a Fabry-Perot interferometer. The cavity at the fiber end is made by a micromachining process based on the wet etching of a SiO2+GeO2 composite of the optical fiber.

5. Computer Systems, Methodologies and Cybernetics Programme unit head: Prof. Dr. Viljem Žumer This programme unit consists of the staffs of the Computer Graphics and Artificial Intelligence Laboratory, System Design Laboratory, Heterogeneous Computer Systems Laboratory, System Software Laboratory and Computer Architecture and Languages Laboratory. Scientific disciplines: Artificial Intelligence, Bioinformatics, Biomathematics, Computer Science, Computer-Assisted Education, Image Processing, Medical Informatics, Signal Processing, System Information Theory, Systems Engineering, Systems Engineering and Computer Technology.

The National programme group Computer Systems, Methodologies and Cybernetics combine their research potential within the whole Institute of Computer Science. In the year 2003 our research work was devoted to the following research areas: semantics and the implementation of programming languages, a study of natural phenomena, algorithms for surface flattening, development and implementation of algorithms for computational geometry, researching the decomposition of bioelectrical signals, analysing ultrasound images, building virtual computer environments for learning and training, methods for design of intelligent systems, heterogeneous processing and web technology. We worked on methodologies for the development of domain-specific languages, exploring domain-specific language design and implementation patterns. The following patterns have been identified: "notation", "task automation", "data structure representation", "data structure traversal", "system front-end", "interaction", "GUI construction" and "AVOT - domain-specific analysis, verification, optimisation, and transformation". Different implementation patterns have been investigated and compared such as: compiler/interpreter, preprocessing, embedding, extensible compiler/interpreter, XML-based, and hybrid. Furthermore, context-free grammar inference based on positive and negative samples using evolutionary computation have been studied. We have been studying the design and implementation of pure object-oriented programming languages with static type systems. Strong typing systems, various dynamic mechanisms, and some functional concept characteristic of declarative languages have been of particular interest. We have developed a safe and efficient language with a high degree of dynamics within a static type system. In addition to a compiler we have already implemented virtual computer architecture FW – 32 Faculty of Electrical Engineering and Computer Science which is designed specifically for byte code execution. Among the implemented concepts are transparent class loading, safe execution, and dynamic linking. In the field of computer graphics and animation, we have studied cloud modelling. The clouds were modelled by the help of implicit primitives which are composed of an implicit skeleton and a blending function. Blending function defines density fall with regard to the distance from the implicit skeleton. Both, blending function and implicit skeleton, influence the basic shape of the cloud and define the manner of passage between the influential areas of the implicit skeleton parts. The blending functions have to be combined to get the final shape of the cloud usually by the weighted sum. Our research included study of various blending functions and the influence of their combined modes to the final shape of the generated cloud. We searched for weaknesses in the current methods, which are mostly bound with implicit surfaces and to propose new solutions. In the field of surface flattening we developed a new method for curve reconstruction based on Euclidean minimal spanning trees in the cloud of points, which we intend to integrate into a new method for surface flattening. In the area of computational geometry, we were engaged in the design, development and implementation of new computer algorithms, and in acceleration of the existing ones. These algorithms include envelope construction, Delaunay and constrained Delaunay triangulation, polygon trapezoidation and triangulation, and construction of geometric buffers. The main stress was on incremental algorithms and the use of acceleration technics, especially sweep-line and uniform space subdivision. We have also developed new solutions for the compression of triangular meshes, and the visualisation and compression of volumetric data represented by voxels. In addition, we have studied the influence of sorting on the speed of sweep-line-based algorithms, and, consequently, the development of a new adaptive algorithm for sorting geometric data. In the field of geometric modelling, new rules for determination of redundant constraints in constraint-based geometric design were studied, and a new algorithm presented for feature-based geometric design, based on boundary representation. In the field of multimedia, we tackled representation of the sights of Maribor by various multimedia types including realistic 3D models. In 2003, we considerably improved our decomposition method based on an inverse correlation matrix of the observed compound signals. We also upgraded our decomposition method for blind source separation. Both were successfully implemented for a decomposition of real electromyographic (EMG) signals. The results were published at several conferences and in journal papers. This achievement significantly contributed to further developments in the NEW project of the European 5th Framework Programme, in which we participate. In the previous year, the SimBio project was completed, i.e. the second European 5th Framework Programme project we were involved in. We developed a computer environment for the verification and validation of human knee models reconstructed from magnetic resonance images. The Electro-Optic and Sensor Systems Laboratory helped us in implementing a novel optic force meter which complies with the operation requirements for magnetic resonance scanners. In this way, we were able to estimate the force exerted by patients during their knee examinations. This significant data was used in subsequent computer simulations of the knee joint dynamics. Together with the Teaching Hospital of Maribor, we carried on with research in the field of automated computer detection of Faculty of Electrical Engineering and Computer Science FW – 33 ovarian follicles in 3D ultrasound recordings. These reconstructed models will be upgraded with algorithms for the analysis and estimation of follicle growth. We entered a new research phase in the field of virtual teaching and training tools. In 2003, we purchased a Delta 6D haptic device with six degrees of freedom. Using it, we developed the first prototype interface software for the device to be connected to VRML-based virtual environments. Our intention is also to control virtual training tools by information extracted from stereovision of the user’s working environment. Therefore, we considerably improved the accuracy and reliability of our multimodal segmentation algorithms applied to these kinds of images. A portal which simplifies the creation, integration and management of information contents was developed in the web technologies area. The basic features are document management, search facility, integration of internal services with external information systems, cross referencing of data and services, information categorization, independency of data to different user interfaces and electronic media, multi language support, authorization of access to data and services, content and user interface personalization. Our portal design consists of some basic recurring services or "horizontal services". These services are responsible for various tasks such as user authentification, external services integration, notification, personalization, searching, user interface and billing. We have developed our own personalization service, which is based on original algorithms for classification of content and users. We have also developed some vertical services, which are used as infrastructure for distance learning portals. This infrastructure will be used for the University of Maribor distance learning portal.

6. Cybernetics Programme unit head: Assoc. Prof. Dr. Vojko Matko This programme unit consists of the staffs of the Measurements Laboratory, Signal Processing and Remote Control Laboratory and Systems and Control Laboratory. Scientific disciplines: Artificial Intalligence, Automation, Metrology, Physical Instrumentation, Robotics, System Information Theory, Telecommunication Engineering. The Cybernetics Research Programme covers goals, research and studies of new laws, methods, algorithms, measurements procedures, signal processing, communication and control carried out by three laboratories (Laboratory for Control and Systems, Laboratory for Signal Processing and Remote Control and Measurements Laboratory). This inter-disciplinary programme envisages modern methods for planning intelligent measurement and regulation systems based on communication, multimedia and modern programme systems for signal acquisition and processing. The research carried out by the Measurements Laboratory is directed towards developing new measurement methods, computer-based measurement data acquisition and towards processing measurement uncertainty with emphasis on resonant methods. Special emphasis is placed on the use of quartz crystals (for measuring relative dielectricity and very small changes of non-electric quantities), development of remote measurements via Internet and LAN networks, resistance FW – 34 Faculty of Electrical Engineering and Computer Science measurement of materials accumulating electric charge and on comparative measurement of position, speed, height, acceleration using satellite signals and various databases (Autoroute, Atlas Slovenije, Jeppesen). To meet the needs of the industry the Measurements Laboratory is engaged in the development of special measurements of pile load bearing in construction, of large object vertical displacement laser measurements and in the design of measurements in the modern home. Laboratory interests also lie in the modelling of measuring uncertainty and the development of an EMI filter designed to reduce disturbances caused by digital switching circuits. The research work of the Laboratory for Control and Systems specializes in the field of control and regulation systems in the theoretical and practical research of classical and modern control system methods and procedures. In particular, this research work is concerned with adaptive, predictive and robust systems. Since 1996 the Laboratory has been active in the research of predictive regulation systems based on robust models and robust synthesis methods in H2 and HĄ. The Laboratory also works on intelligent systems theory, in particular on neurone network systems. In the field of multimedia, the Laboratory is engaged in the research of user-friendly software applications, human-computer communication and in the development of distance learning, which includes the designing of content and study techniques, as well as data transfer technologies. The laboratory for Signal Processing and Remote Control is active in the theoretical scientific fields of signals, information and telecommunications. Recent research work has been directed towards basic research work on intelligent algorithms of 3D image context-based compression and processing, towards ATM network control, planning and development of new algorithms in cable communication and GSM networks, controlling radiator radiation using computer vision, setting image parameters on cathode screens using polynomial methods of edge modelling in pattern recognition and hybrid optimization algorithm, and towards a hybrid regulation algorithm which enables implementation of new control strategies replacing the classic pulse width modulations in controlling power switch controllers.

7. Applied Electromagnetics Programme unit head: Assoc. Prof. Dr. Mladen Trlep This programme unit consists of the staffs of the Electrical Machines Laboratory, Fundamentals and Theory of Electrotechnics Laboratory and Applied Electromagnetics Laboratory. Scientific disciplines: Electrical Engineering, Electromagnetism. Within the framework of the research programme “Applied Electromagnetics”, parallel work is carried out in three fields, with the ultimate aim of incorporating all the knowledge into a complex system which will, as accurately as possible, cover all the demands of a real electromagnetic problem. The three fields are: - research and development of mathematical models for defining magnetic, electrical, current and temperature field under stationary and dynamic conditions, - development of measurement methods for defining the real characteristics of material, - development of models to be used for solving inverse problems in electrotechnics. Faculty of Electrical Engineering and Computer Science FW – 35

The first part focuses on the numerical methods for electromagnetic field calculation, namely the finite element and boundary element methods. The development and application of the above methods are directed to CAD program solutions on concrete objects. In most cases, these objects are electromechanical converters, actuators, switches, insulating and grounding systems, etc. The development of measurement methods focuses on measurement methods for accurately defining the real characteristics of materials and losses in them, which is necessary for a more realistic mathematical model of the electromagnetic system. This work is carried out using methods for defining magnetization and hysteresis curves, and on a determination of the pulsating and rotational losses in magnetic materials. Software for supporting the measurement methods is developed. Measuring yoke prototypes are produced with explicit poles for square specimen, and disposed excitation for a circular sample. The measuring yokes are developed and produced with the help of our own software which makes it possible to calculate real three dimensional transient problems using the finite element method. We decided on a special variation of the boundary element method, the so-called DRM method, for solving the inverse problem, which enables simpler operations in the domain, where we want to determine the inverse problem. Our initial work has been directed to problems of 2D static fields, where we detect any unknown distribution of electromagnetic field sources, or rather, unknown material property. Both problems are very prevalent in bioelectromedicine, when searching for defects in material structure, for development of measurement methods, etc. In the year 2003, the programme unit of Applied Electromagnetics organised an international conference ISEF 2003 (INTERNATIONAL SIMPOSIUM ON ELECTROMAGNETIC FIELDS IN ELECTRICAL ENGINEERING) which took place at the Faculty of Electrical Engineering and Computer Science in Maribor from 18th of September until the 20th of September. 150 domestic and foreign scientists and researchers working on the numerical calculations of electromagnetic fields and applied electromagnetics field of research took part in the conference. The programme unit was also a co-organizer of the second Slovenien-Polish Joint Seminar that took place in Cracow from the 16th of June until 18th of June.

8. Institute of Robotics Programme unit head: Prof. Dr. Karel Jezernik This programme unit consists of the staffs of the Power Electronics Laboratory, Industrial Robotics Laboratory and Kinematics and Simulations Laboratory. Scientific disciplines: Automation, Motors and Propulsion Systems, Robotics. In 2003, the main event regarding the international activities of our research group was the organization and performance of the IEEE International Conference on Industrial Technology. This conference was held at the Hotel Habakuk in the city of Maribor, Slovenia. 297 papers were submitted and 230 of these were accepted. Over three days 19 Special Sessions (102 papers) and 22 Regular Sessions (128 papers) were attended by 218 participants from 26 countries. The technical program was divided into seven tracks: Computational Intelligence (17 papers), Mechatronics (52 papers), Signal Processing and System Control (43 papers), Industrial FW – 36 Faculty of Electrical Engineering and Computer Science

Information Technology (41 papers), Power electronics (55 papers), Teleoperation (11 papers) and Embedded Systems (11 papers). Application of new theoretical results in the fields of automation and robotics are being designed with dedicated systems and appliances used in interface, monitoring, communications, and control. Such control applications increasingly require advanced capabilities such as high resolution and user-friendly graphical user interface (GUI), TCP/IP connectivity, and diverse memory units (flash memory, disk-on-chip, hard disk, CD-ROM, etc.). Thus, our research programme opened a new field: system control performed by PC technology and DSP controllers on the basis of the QNX hard real-time operating system, and the open source Linux operating system. Programme unit research also addresses the field of factory automation within the scope of open machine control systems such as a PC based CNC controller. The CNC controller is built on the basis of QNX, which is a hard-real time operating system. Ethernet TCP/IP connects distributed control units with the central control system. The controller is also linked to the factory network, thus making a solid base for total factory automation within CAM. Benefits include faster design cycles, lower downtime using diagnostics and simulation tools, increased productivity and decreased maintenance costs.

Institute of Automation AU – 1

INSTITUTE OF AUTOMATION

Head: Prof. Dr. Karel Jezernik Phone: +386 2 220 73 00 E-mail: [email protected] URL: http://www.au.feri.uni-mb.si/index.html-l2

The Institute of Automation participates in basic and applied research in the fields of electrical and high precision measurement of electrical and non electrical quantities, measurement automation, signal processing, and remote control, sensor systems, systems theory and control, modelling, identification, computer control of processes, system design in automation, software in automation, expert systems in automation, fuzzy control systems, human-machine communication, electro-optic systems, programmable logic control systems, and real time control systems.

The Institute of Automation co-operates with many institutes abroad: Technische Universität Graz - Austria, Technische Universität Wien - Austria, Politehnikais Instituts Latvijas, Riga - Latvia, Fachhochschule München, Technische Univerersität München - Germany, Deutsche Forschungsanstalt für Luft- und Raumfahrt Oberpfaffenhofen - Germany, Ecole Polytechnique Féminine, Sceaux, Paris - France, Guangxi University of China, Nanning - China, Elektrotehnički fakultet, Zagreb - Croatia, Tehniška univerza, Bratislava - Slovak Republic, University of Sarajevo - Bosnia and Herzegovina, Faculty of Electrical Engineering in Pragua and Brno - Czech Republic.

The members of the Institute of Automation belong to five laboratories, which also includes one centre of technology. AU – 2 Institute of Automation

Institute of Automation Head: Prof. Dr. Karel Jezernik

Systems Control Signal Processing and Laboratory Remote Control Laboratory Head: Assoc. Prof. Dr. Rajko Svečko Head: Prof. Dr. Žarko Čučej

Process Measurements Automation Laboratory Laboratory Acting Head: Head: Assoc. Prof. Dr. Vojko Matko Assoc. Prof. Dr. Boris Tovornik

Electro-Optics and Sensor Systems Laboratory Head: Assoc. Prof. Dr. Denis Đonlagić

Institute of Automation AU – 3

Systems Control Laboratory

Head: Assoc. Prof. Dr. Rajko Svečko

Employees: Asst. Prof. Dr. Matjaž Debevc; Dr. Amor Chowdhury; Andrej Knuplež, Ing.

Signal Processing and Remote Control Laboratory

Head: Prof. Dr. Žarko Čučej

Employees: Asst. Prof. Dr. Peter Planinšič; Dr. Dušan Gleich; Tomaž Romih, MSc; Mihael Kaiser, BSc

Process Automation Laboratory

Head: Assoc. Prof. Dr. Boris Tovornik

Employees: Asst. Prof. Dr. Nenad Muškinja; Asst. Prof. Dr. Marjan Golob; Stojan Peršin, BSc; Alojz Hojnik, Ing.

Part-time employed: Aleksander Polutnik, MSc

Measurements Laboratory

Acting Head: Assoc. Prof. Dr. Vojko Matko

Employees: Dr. Bojan Gergič; Ladislav Mikola, MSc; Darko Hercog, BSc; Stanislav Lampič, Ing.; Miloš Vute, Ing.

Electro-Optics and Sensor Systems Laboratory

Head: Assoc. Prof. Dr. Denis Đonlagić

Employees: Edvard Cibula, BSc AU - 4 Systems and Control Laboratory

SYSTEMS AND CONTROL LABORATORY

Head: Assoc. Prof. Dr. Rajko Svečko Phone: +386 2 220 71 40 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Research and development projects

CRP-KS-62/02, V5- Poučevanje in učenje s sodobnimi tehnologijami za osebe s 0639-02 in frame of posebnimi potrebami (gluhi in naglušni) CRP 2001-2006 (Teaching and learning with modern technologies for people with special needs (hearing disabled people)) Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Dr. Amor Chowdhury, Assoc. Prof. Dr. Riko Šafarič Project partners: Faculty of Electrical Engineering, University of Ljubljana, Faculty of Computer and Information Sciences, Ljubljana, Pedagoška fakulteta, Ljubljana, Pedagoška fakulteta, Maribor Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Developmental changes in education are most obvious when transforming from a classic society an informational society. Unfortunately, the lack of knowledge and skills for the use of modern computer technology is still present in many educational institutions for people with special needs in Slovenia. Moreover, lower instances of professional support and help to users of new technologies is providing further problems. In addition to this, people with special needs, especially hearing impassed people, have very limited chances for further education at all levels of education. For this reason, the mentioned population sector is one of the worst educated in Slovenia. In order to find a solution to this problem, this project involves the analysis, formation and definition of activities for the needs and development of education using ICT for people with special needs (hearing impassed people) in Slovenia, and also involves didactical and Systems and Control Laboratory AU - 5

technological preparation for educational institutions and pedagogues. The next step, involved in the proposed project, is the widening of our work to additional analysis and defining activities for the use of ICT for leading teams and all teachers in these institutions, and with the help of seminars, faster introduction and usage of ICT in the educational process. In this way, this project presents an introduction to a common national programme for the development of e-education for people with special needs (hearing impassed people) in Slovenia. This will require long-term development and composition of suitable media and materials for the education of people with special needs.

MCT Moderna teorija vodenja (Modern Control Theory) Leader: Assoc. Prof. Dr. Rajko Svečko Participants: Dr. Amor Chowdhury, Martin Pec, Andrej Knuplež Financed by: Ministry of Science and Technology of the Republic of Slovenia, Faculty of Electrical Engineering and Computer Science

Controller design problems were originally formulated in the frequency domain. The main tools used during the early phases of research into this class of problems have been operator and approximation theory, spectral factorization, and (Youla) parametrization, leading initially to rather complicated (high-dimensional) optimal or sub-optimal (under the H-infinity norm) controllers. Riccati equations of the type that arise in linear-quadratic differential games play a key role. These findings have prompted further accelerated research into the topic, and for more direct time-domain (state-space) derivation of these results. Among different time- domain approaches to this class of worst-case design problems, the one that uses the framework of dynamic (differential) game theory seems to be the most natural. This is because the original H_inf -optimal control problem (in its equivalent time-domain formulation) is, in fact, a minimax optimization problem, and is, therefore, a zero-sum game, where the controller can be viewed as the minimizing player and disturbance as the maximizing player. Using this framework, our research focuses on a complete theory that encompasses continuous-time as well as discrete-time systems, finite as well as infinite horizons, and several different measurement schemes. We also discuss extensions of linear theory to nonlinear systems, and derivation of lower-dimensional controllers for systems with regularly and singularly perturbed dynamics. Currently we are engaged in several problems such as:·1. Development of a robust controller synthesis method for systems where the performance demand is asymptotic tracking to the sinus reference signal.·2. Order minimization of synthesis weight functions.·3. Study of the connection between the pole placement and the H_inf synthesis. AU - 6 Systems and Control Laboratory

CRP-KS-50/02, V5- Didaktični vidiki uproabe informacijske in komunikacijske 0638-0589-02 tehnologije – IKT (poučevanje in učenje) (Didactical views on use of Information and communication technology – ICT (teaching and learning)) Leader: Ivan Gerlič (Faculty of Education) Participants: Asst. Prof. Dr. Matjaž Debevc Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

There are many factors that have an impact on the chances of using information and communication technology within education. This project is analyzing and stating didactical views, respectively a didactical model, whose structure is significant in the preparation phase, as well as in the composition and verification phase of learning material for education. In the process of preparation, composition and evaluation of education it is very important to know the didactical basics of educational analysis, which give the executers the answers or comparisons between planned and realized, thematic, pedagogically-psychological, methodical and organizational -technical fields. They make the evaluation of deviation in both positive and negative senses possible, and allow presentation of the causes of deviations. The project analyses important origins, e.g. thematic origins, pedagogically-psychological origins, methodical origins and organizational-technical origins.

MSMA Mikrokrmilniški sistem za samodejno usmerjanje mikrovalovnih anten (Microcontroller system for self- positioning of microwave antennas) Leader: Assoc. Prof. Dr. Rajko Svečko Participants: Boris Ratej, Dr. Amor Chowdhury, Andrej Knuplež Financed by: Faculty of Electrical Engineering and Computer Science

Reporting life outside the studio at the scenes of events is daily bread and butter for many radio reporters. The teams for outside studio reporting are usually equipped with special vehicles and adequate technical equipment. When reporting outside the studio takes longer, then from the cost viewpoint, the most rational telecommunication connection between reporter and radio centre is truly their own microwave link. A lot of experience and handwork is needed by the technician, and because this operation is time consuming and often unsafe to restore the microwaves link. The idea of automation was introduced for this procedure. The aim of this project was performin the synthesis and development of adequate hardware and software for automatic microwave link connection between a mobile reporter vehicle and the radio centre. The whole device is built from five components (microcontroller system, Systems and Control Laboratory AU - 7

communication-navigation unit, device driver unit, power supply unit, and user interface). The core of the device is a microcontroller system with a SIMENS SAB 80C535 microcontroller, which provides all the needed intelligence. The communication-navigation unit is composed of a GSM modem with an integrated GPS navigation system and an electronic compass VECTOR 2XG. GPS is the source for the vehicle position data, which is not enough for automatic microwave link establishment. An electronic compass is added because of this. The GSM modem also has a role in communication backup in case the microwave link is impossible to restore. Another important unit is the user interface, which enables device manipulation. The device has three important operation modes, which are self-testing, microwave link and GSM link mode. In the software design, special care was taken regarding device reliability. So with the goal of getting a reliable device, algorithms and software for self-testing and error discovery have been developed and implemented. Finally, the functional value of the device has been proven by laboratory tests (figures 1 and 2).

CRP-KS-193/02, V5- Poučevanje in učenje na daljavo (celovita uvedba 0653-1538-02 e-izobraževanja na nacionalni ravni) (Complete E-learning introduction on a National Scale in Slovenia) Leader: Janez Bešter (Faculty of Electrical Engineering, Univesity of Ljubljana) Participants: Asst. Prof. Dr. Matjaž Debevc Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

The aim of this project is an elaboration of the existing Slovenian National E-learning Strategy document, that will serve as the guideline for future complete e-learning implementations in Slovenia. The strategy consists of didactical, organizational, economic, technological and content e-learning aspects intended for elementary and secondary school, academic, corporate, governmental and lifelong learning environments. Various pilot e-learning implementations are being conducted along with strategy development. In this way, theory concepts are supported by practical experience. The applications, materials and information resulting from this project will be systematically presented and adopted by the wider public in Slovenia. Training and use of the previously mentioned resources will contribute to better information literacy in Slovenia. Key players in Slovenia from various fields who address e-learning are included in the project. They constitute the National E-learning Consortium, that has been formed within project activities. The Consortium will develop guidelines for coordinated e-learning introduction into various target environments. The project is also open to cooperation with any organization or individual that could contribute to e-learning development and AU - 8 Systems and Control Laboratory

implementation in Slovenia.

Industrial projects

Učeče se podjetje: Avdio-video tehnologije za prenos predavanj in orodja za št. 1010-415-2002 preverjanje znanja za spletno izobraževanje na daljavo s poudarkom na tehničnih vedah (Audio-video technologies for distance education and tools for examination over the world wide web with the emphasize on technical sciences) Leader: Janez Bešter (Faculty of Electrical Engineering, Univesity of Ljubljana) Participants: Asst. Prof. Dr. Matjaž Debevc Project partners: ESOTECH, d. d. Financed by: Ministry of Economics of the Republic of Slovenia

The aim of this common project is the development and accommodation of learning equipment for distance learning, which already exists at Universities. The emphasis is on companies that follow the concept of all-learning individuals and make it possible for them to take advantage of distance learning benefits, whereas the stress is on the functional knowledge of technical profession. This project will combine the experiences of two Universities in the field of distance education and will, with the incorporation of companies, spread the chances for faster implementation, and a breakthrough of distance education in the economic sector.

International projects

BITEMA Bilingual Teaching Material for the Deaf by Means of ICT Leader: Niels Nielsen (Castberggaard) Participants: Bogdan Dugonik, MSc; Asst. Prof. Dr. Matjaž Debevc Project partners: Communication Centre for the Deaf and Hard of Hearing, Greta Paramedical et Social, University of Maribor, Castberggaard Financed by: European Union

The framework of this project will enhance the educational methods for deaf adults who cannot apply for a better job because of a lower level of knowledge or bad qualifications. Appropriate technical, software, and didactical tools will be proposed and developed to help Systems and Control Laboratory AU - 9

improve the knowledge level of the adults. Special software will be developed, which will enable tutors to prepare learning material on the web by themselves. This tool will allow them to prepare the material containing multimedia elements, such as video, 3D-animation, videochat, web-chat, and others.

EL3 eLernen und eLehren in der Lehrer-Aus- und Weiterbildung Leader: Peter Gorny (Univerza Oldenburg) Participants: Asst. Prof. Dr. Matjaž Debevc Project partners: Univerza Oldenburg, Universität Erlangen Financed by: Bundesministerium für Bildung und Forschung

This project was meant for the learning and teaching of pedagogical teachers in Germany. It is a project, where network supported learning materials for students and teachers at all study levels will develop and evaluate (16 different study courses). The goal of the project is to provide advanced and practical oriented student opportunities, to get to know new media and technologies for acquired learning subject.

SUPPORT LEONARDO da VINCI project: SUPPORT- Training course on sustainable product development Leader: Jurgen Jantschgi (University of Leoben) Participants: Asst. Prof. Dr. Matjaž Debevc; Bogdan Dugonik, MSc Project partners: Faculty of Electrical Engineering and Computer Science, Creax, AREA Science Park Consortium, Joanneum Research, Graz, Fraunhofer Institute Aachen, University of Leoben Financed by: European Union

The aim of the SUPPORT project was a search of new methods in the field of innovation leading in companies, namely with development of innovative learning courses for companies in the field of innovative products development. The creative technique method for innovative products, used in this project is TRIZ philosophy, which is the tool for support team work in the search for a fast and effective solution at the highest level. The content is divided into: production and process definition, knowledge transmission, knowledge cutting, problem solving using the TRIZ method, use of Internet & patents and evaluation. AU - 10 Systems and Control Laboratory

Completed research projects 2003

Applied project

CD-ROM Študijska gradiva za izobraževanje na daljavo (Learning material for distance education) Leader: Asst. Prof. Dr. Matjaž Debevc Duration: Aug. to Mar. 2003

This project offered the formation and composition of multimedia learning materials explaining the preparation and formation of classic and electronic learning material for the needs of distance education, respectively distance learning. The learning material is designed for the pedagogical cadre when preparing e-material at all levels of education. It includes short and clear information, together with various examples of animations, simulations and video copies.

HIPULAB Hipermedijska učilnica in laboratorij (Hypermedia classroom and laboratory) Leader: Asst. Prof. Dr. Matjaž Debevc Financed by: Ministry of the Information Society

Duration: Aug. 2002 to Mar. 2003

The main goal of this project was to compose a combined modern university classroom and laboratory for all those students and pedagogues, who would on the basis of high technological support, allow more a qualitative level of learned subject presentation. The classroom and laboratory, which was named a ‘Hypermedia classroom’, should be formed so qualitatively, that it would allow for the implementation of new developments over the next ten years without serious intervention.

ŠGID CD-ROM – Študijska gradiva za izobraževanje na daljavo (CD-ROM – Learning material for distance learning) Leader: Asst. Prof. Dr. Matjaž Debevc Financed by: Ministry of the Information Society

Duration: Aug. 2002 to Mar. 2003

This project offered the formation and composition of multimedia learning material explaining Systems and Control Laboratory AU - 11

the preparation and formation of classic and electronic learning material for the needs of distance education, respectively distance learning. The learning material is designed for the pedagogical cadre when preparing e-material at all levels of education. It includes short and clear information, together with various examples of animations, simulations and video copies.

International project

SLO-BIH 19/2002- New Didactic Methods Distance Learning 2003 Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Assoc. Prof. Dr. Riko Šafarič, Prof. Dr. Karel Jezernik Project partners: Faculty of Electrical Engineering, University of Tuzla Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Jan. 2002 to Dec. 2003

The Universities of Maribor and Tuzla have enyojed excellent collaboration over the past few years. The development of distance education has its special place within this collaboration, since it may even deepen and widen it in all areas. The results of the project were divided into two parts: Firstly, Centre for distance education was formed in Bosnia and Herzegovina on the basis of research results. Secondly, the project helped in improving the quality of Slovenian distance institutions, which caused a more successful and adaptable distance education process. In the second part of the project, specific software for the distance execution of laboratory experiments was developed and allowed students to observe real laboratory processes from a distance. This process was further observed using video cameras and was published for distance viewing all over the world. The consequences of distance observation exercises are lower costs (less lecturers and assistants needed) and lower costs for laboratory equipment. In the framework of this project, the chance for the cooperation of students during practical hours at a distance faculty exists as well as the commercialization of this kind of software.

PUBLICATIONS

Matjaž Debevc, Bogdan Dugonik, Ivan Gerlič, “Informacijska družba in izobraževanje gluhih in naglušnih,” Vzgoja in izobraževanje v informacijski družbi, Vol. 36, No. 8, pp. 562-569, 2003. AU - 12 Systems and Control Laboratory

Tomaž Romih, Jože Mohorko, Rajko Svečko, Žarko Čučej, “Automatic adjustment of the CRT screen image geometry parameters,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 965-968.

Amor Chowdhury, Marjan Golob, Peter Cafuta, Rajko Svečko, “Robust controller design for position control of the metal ball in magnetic field,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1058- 1063.

Bogdan Dugonik, Matjaž Debevc, Zmago Brezočnik, “Implementation and use of video technologies for deaf community,” Proceedings of ED-MEDIA 2003, World conference on educational multimedia, hypermediaand telecommunications, Jun. 2003; Honolulu, Hawaii, USA, pp. 3079-3082.

Andrej Knuplež, Amor Chowdhury, Rajko Svečko, “Modeling and control design for the ball and plate system,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1064-1067.

Radovan Krajnc, Matjaž Debevc, “Možnosti in omejitve razvoja interaktivnih TV aplikacijs pomočjo odprtega standarda MHP,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 389-392.

Janez Primožič, Rajko Svečko, “Control in refrigeration systems,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1040-1045.

Boris Ratej, Amor Chowdhury, Rajko Svečko, “Microwave antenna self-directing system,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1052-1057.

CONGRESSES, MEETINGS, AND COMMITTEES

Assoc. Prof. Dr. Rajko Svečko: Reviewer, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Assoc. Prof. Dr. Rajko Svečko: Section chair, Special session organizer, session chair, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003. Signal Processing and Remote Control Laboratory AU - 13

SIGNAL PROCESSING AND REMOTE CONTROL LABORATORY

Head: Prof. Dr. Žarko Čučej Phone: +386 2 220 71 20 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

UNO-ATM-2003 Upravljanje in nadzor omrežij ATM.2003 (Management and supervision of network ATM-2003) Leader: Prof. Dr. Žarko Čučej Participants: Mihael Kaiser Financed by: Laboratory for Signal Processing and Remote Control, Ministry of Education, Science and Sport of the Republic of Slovenia

This project researches the basic problems for the management and supervision of ATM communication networks, especially investigating the possibilities of using artificial intelligence.

K-2D-3D-03 Komprimiranje dvo in tridimenzionalnih signalov (Compression of Two and Three Dimensional Signals 03) Leader: Prof. Dr. Žarko Čučej, Asst. Prof. Dr. Peter Planinšič Participants: Dr. Dušan Gleich, Asst. Prof. Dr. Peter Planinšič, Prof. Dr. Žarko Čučej Financed by: Laboratory for Signal Processing and Remote Control, Ministry of Education, Science and Sport of the Republic of Slovenia

The project uses advanced image and video coders on the basis of EZW, SPIHT, and SFQ AU - 14 Signal Processing and Remote Control Laboratory

techniques and our own developed techniques using fuzzy sets. Moving estimation algorithms are researched. A low bit-rate video codec using edge based motion estimation is developed.

Applied projects

L2-5196-1699-3 Napredni kompresijski kodek za uporabo v mobilnih omrežjih (Advanced compression codec for use in mobile networks) Leader: Asst. Prof. Dr. Peter Planinšič Participants: Dr. Dušan Gleich; Prof. Dr. Žarko Čučej; Tomaž Romih, MSc; Mihael Kaiser Project partners: ULTRA Company Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, ULTRA Company

An advanced colour image codec is developed on the basis of wavelet transform. The algorithm is implemented on the TMS320C2407 digital signal processor. The wavelet transform is realised using a lifting scheme. The progressive quantization and arithmetic coding of bit planes is realised. The efficiency of the codec is comparable to a codec based on standard JPEG2000.

Completed research projects 2003

Basic research project

UNO-ATM-2002 Upravljanje in nadzor omrežij ATM-2002 (Management and supervision of network ATM-2002) Leader: Prof. Dr. Žarko Čučej Participants: Mihael Kaiser Financed by: Laboratory for Signal Processing and Remote Control, Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Jan. 2002 to Dec. 2003

This project researched the basic problems of the management and supervision of ATM communication networks. The principles of traffic management and resource scheduling were investigated on the basis of traffic statistical characterization. Signal Processing and Remote Control Laboratory AU - 15

PUBLICATIONS

Tomaž Romih, Jože Mohorko, Rajko Svečko, Žarko Čučej, “Automatic adjustment of the CRT screen image geometry parameters,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 965-968.

Peter Planinšič, Aljana Petek, “Analysis of electrochemical noise signals using fractal function wavelets,” IAFA 2003 proceedings, The first South-East European symposium on Interdisciplinary approaches in fractal analysis, May 2003, Bucharest, Romania, pp. 235-242.

Žarko Čučej, Mihael Kaiser, Dušan Gleich, Peter Planinšič, “Sketch for communication issues in power electronics building blocks connections,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1026- 1031.

Dušan Gleich, Peter Planinšič, Žarko Čučej, “Low bitrate video coding using wavelet transform,” Proceedings EC-VIP-MC 2003, 4th EURASIP conference focused on video/image processing and multimedia communications, Zagreb, Croatia, Jul. 2003, Vol. 1, pp. 369-374.

Mihael Kaiser, Žarko Čučej, “Artificial intelligence in modern telecommunication systems: analysis and implementation,” Proceedings EC-VIP-MC 2003, 4th EURASIP conference focused on video image processing and multimedia communications, Zagreb, Croatia, Jul. 2003, Vol. 2, pp. 805-810.

Franc Mihalič, Dušan Gleich, Peter Planinšič, “Automatic ripple analysis of DC-DC converter,” The IEEE Region 8 EUROCON 2003: computer as a tool, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Sep. 2003, Vol. A, pp. 160-162.

Jože Mohorko, Žarko Čučej, “Optimization of 16 bit fix-point multiplication in fastDCT implemented on TMS320C200 DSP,” Proceedings EC-VIP-MC 2003, 4th EURASIP conference focused on video/image processing and multimedia communications, Zagreb, Croatia, Jul. 2003, Vol. 1, pp. 287-292.

Peter Planinšič, Aljana Petek, “Analysis of electrochemical noise signals with classicalmethods and methods based on fractal-like wavelets,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 871-876.

PRESENTATIONS BY THE LABORATORY MEMBERS

Peter Planinšič: “GANS RESCUE: Guardian Angel System - Real-time European internet- based telemedical Solution for the Care of Unexpected Emergencies,” proposal of integrated AU - 16 Signal Processing and Remote Control Laboratory

project (IP) for European 6. fp (as partner)- accepted in evaluation process, Belgium, Apr. 6, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Asst. Prof. Dr. Peter Planinšič: Member of organizing committee, conference, Automatization of industry, Maribor, Slovenia, Apr. 10–11, 2003.

Prof. Dr. Žarko Čučej, Member of international programme committee, Asst. Prof. Dr. Peter Planinšič: symposium, The First South-East European Symposium on Interdisciplinary Approaches in Fractal Analysis, Bucharest, Romania, May 7–10, 2003.

Asst. Prof. Dr. Peter Planinšič: Section chair, organizer and chairman of special session "Fractals and Chaos in Nonlinear Systems and Computing", symposium, The First South-East European Symposium on Interdisciplinary Approaches in Fractal Analysis, Bucharest, Romania, May 7–10, 2003.

Prof. Dr. Žarko Čučej: Member of international programme board, international symposium, 45th International Symposium Electronics in Marine, Zadar, Croatia, June 16–18, 2003.

Prof. Dr. Žarko Čučej: Member of international programme board, conference, 4th EURASIP Conference focused on Video/Image Processing and Multimedia Communications, Zagreb, Croatia, July 2–5, 2003.

Prof. Dr. Žarko Čučej: Member of international programme board, international workshop, 10th International Workshop on Systems, Signals and Image Processing, Praga, Czech Republic, Sept. 10, 2003.

Dr. Dušan Gleich, Reviewer, international conference, IEEE Asst. Prof. Dr. Peter Planinšič, International Conference on Industrial Technology, Prof. Dr. Žarko Čučej: Maribor, Slovenia, Dec. 10–12, 2003. Signal Processing and Remote Control Laboratory AU - 17

Asst. Prof. Dr. Peter Planinšič: Section chair, Special session "Chaotic dynamics in electrical and electromech. systems" co-organizer, session co-chair, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Prof. Dr. Žarko Čučej: Section chair, special session "Industrial telecommunication I, II" organizer, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10– 12, 2003.

Asst. Prof. Dr. Peter Planinšič: Automation in Industry and Commerce, conference, organization and implementation, Maribor, Slovenia, Apr. 10–11, 2003.

VISITS TO OTHER INSTITUTIONS

Asst. Prof. Dr. Peter Planinšič: Participation in seminar lectures at the Center for Applied Mathematics and Theoretical Physics CAMPT, University of Maribor, seminar participation, Maribor, Slovenia,: May 20, Sept. 5 and Oct. 24, 2003.

Asst. Prof. Dr. Peter Planinšič: Visit to One-day professional conference about measurements and automation NiDay 2003, organized by National Instruments d. o. o., seminar participation, Ljubljana, Slovenia, Nov. 13, 2003.

Dr. Dušan Gleich, Visit to One-day conference "Optical access to end Asst. Prof. Dr. Peter Planinšič: user", organized by Fotona, d. d., seminar participation, Ljubljana, Slovenia, Dec. 2, 2003.

GUESTS AND VISITORS

Yo-Sung Ho Invited lecture "Geometry Compression of Three (Kwang-Ju Institute of Science and Dimensional Polygonial Mesh Models", visit, July 7, Technology, Kwangju, Republic of 2003. Korea): AU - 18 Signal Processing and Remote Control Laboratory

Panagiotis Liatsis Visit to the framework of International Conference (City University, School of Engineering on Industrial Technology ICIT'03, Maribor, Slovenia, and Mathematical Sciences, London, visit, Dec. 10–12, 2003. United Kingdom), Branka Zovko-Cihlar (Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia):

Jože Mohorko Presentation of research project L2-5196-1699-3 (ULTRA Company, Zagorje ob Savi, "Advanced compression codec for use in mobile Slovenia): networks" for the year 2003, and the hand over of FER-results (report and C-source code), project meeting participation, Dec. 16, 2003.

Process Automation Laboratory AU - 19

PROCESS AUTOMATION LABORATORY

Head: Assoc. Prof. Dr. Boris Tovornik Phone: +386 2 220 71 60 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

LPA-DN Diagnostika napak (Fault Diagnosis) Leader: Assoc. Prof. Dr. Boris Tovornik Participants: Stojan Peršin, Asst. Prof. Dr. Nenad Muškinja, Alojz Hojnik This project addresses several aspects when implementing the fault diagnosis of technical systems. The system under consideration is controlled by PLC and supervised by the SCADA system and the procedure for fault diagnosis is designed with particular emphasis on industrial practice. The general structure of fault diagnosis consists of three major stages: symptom generation, symptom evaluation, and fault isolation. Symptoms (often referred to as residuals) represent deviations of the process measurements from the expected behaviour of the process. A linearization called velocity based linearization is proposed for non-linear systems before the residual generation, and then the most important methods are described using analytical redundancy. An alternative approach to residual generation is the use of Principal Component Analysis and, as is shown, with some modifications it can generate structured residuals that are suitable for further fault isolation. The problem of isolation is treated by an approximate reasoning approach, called the transferable belief model which outranges the classical Boolean reasoning. The proposed solutions are investigated and verified by simulations and experiments. AU - 20 Process Automation Laboratory

Applied projects

L2-3436-0796 Mehko krmiljenje digitalnih varilnih izvorov za MIG/MAG elektroobločna postopka varjenja (Digital Fuzzy Welding Control in MIG/MAG Gas Metal Arc Welding) Leader: Asst. Prof. Dr. Marjan Golob Participants: Assoc. Prof. Dr. Boris Tovornik; Asst. Prof. Dr. Nenad Muškinja; Asst. Prof. Dr. Marjan Golob; Aleksander Polutnik, MSc; Stojan Peršin; Alojz Hojnik; Miloš Vute Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Varstroj, d. d.

During last year we cooperated with the Varstroj Research Centre in performing process measurements when welding using different arc welding methods (MIG, MAG, Pulse welding, etc.) We applied measurement equipment and tools, which had been developed over previous years and are suitable for safety measurements essential in the field of welding. A knowledge base was defined of a fuzzy inverse model of the welding process. The relationships between particular welding parameters were represented with fuzzy rules and included into the knowledge base. These relationships are important for attaining one of the project objectives, namely a realization of the synergic parameter adjustment method on the welding equipment. Simple selection of welding programmes and synergic parameter setting (using a single knob) simplify welding operations. We found that the knowledge base for the synergic welding device can be realized in two manners: with a relationship table and with fuzzy logic based approximative reasoning. The first method is suitable for simple welding processes and devices, where the number of welding parameters is small. We developed a fuzzy logic based approximative reasoning system. The system was realised on a PC computer and was tested in a laboratory. The obtained results confirm the assumption that a fuzzy logic-based approximative reasoning system can be integrated into the controller of a synergic welding device.

Research and development projects

LPA-IH Inteligentna hiša (Intelligent House) Leader: Assoc. Prof. Dr. Boris Tovornik Participants: Stojan Peršin; Asst. Prof. Dr. Nenad Muškinja; Aleksander Polutnik, MSc; Alojz Hojnik The model of an intelligent home is used for several tests using different approaches for Process Automation Laboratory AU - 21

control and connections between sub-systems. The model was made based on LonWorks technology and it includes two rooms and a basement. The LonWorks network is connected to a Web Server and also to a Supervisory Control and Data Acquisition System. The connection was made using OLE for Process Control, which provides the universality of the solution. For testing purposes a real-time connection could also be established with some mathematical software, i.e. Matlab.

International projects

RoboLab Control Systems and Automatisation in Marine Vehicles Leader: Zoran Vukić (Department of Control and Computer Engineering and Automation, Faculty of Electrical Engineering and Computing, University of Zagreb) Participants: Assoc. Prof. Dr. Boris Tovornik, Satko Mandjuka, Guy O. Beale, Mogens Blanke, Ljubomir Kuljača Project partners: George Mason University, Faculty of Electrical Engineering and Computing, University of Zagreb, Technical University of Denmark, Automation at Oersted.DTU, Brodarski Institute Zagreb Financed by: Ministry of Science and Technology of the Republic of Croatia

The aim of the research is the realisation of a marine vehicle system, qualified for autonomous decisions and task co-ordination. The goals of this vehicle are complete autonomy without any human presence.

CEEPUS – CZ 103 CEEPUS – project Leader: Assoc. Prof. Dr. Boris Tovornik Project partners: Technical University of Gabrovo, Technical University of Sofia - Branch Plovdiv, Kielce University of Technology, University of Miskolc, Viena University of Technology, Graz University of Technology, Czech Technical University Prague, Slovak University of Technology in Bratislava, Faculty of Natural Sciences, Mathematics and Education, University of Split, Danube University in Krems, Donau-Universität Krems, Faculty of Mechanical Engineering, Brno University of Technology, Faculty of Electrical Engineering and Communication, Brno University of Technology, Faculty of Chemical Engineering and Technology, University of Zagreb, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Faculty of Electrical Engineering and Computing, University of Zagreb, Technical AU - 22 Process Automation Laboratory

University of Kosice Financed by: CEEPUS

The project’s purpose is student and professor exchanges in the Middle and Eastern European regions, organization of international summer schools and the co-ordinating proposals for common research projects. In 2003, we were co- organizers of the Summer School "Advanced Control Theory and Applications", which was organized in Plovdiv and Gabrovo, Bulgaria (June 16 - June 29, 2003).

Completed research projects 2003

Industrial project

LPA-SVI Sinergijski varilni izvor (Synergic Welding Device) Leader: Asst. Prof. Dr. Marjan Golob Participants: Janez Pogorelc, MSc; Assoc. Prof. Dr. Boris Tovornik Financed by: Varstroj, d. d.

Duration: June to Oct. 2003

The industrial project goal was to develop software for the controller of a new synergic welding device. The controller is based on the PIC 16F877 microprocessor. Specification analysis was performed and software specification was decomposed into the modules. Descriptions of input, output and intermediate variables were done and development tools (MPLAB 6.20, ICD2, HiTech C compiler on MS WinXP and MPLAB5.70, ICD1, CCS C compiler on MS Win98SE) were prepared. The software which enable the operation of the welding device in different modes, discrete speed control of the welding wire feed, PWM control of the DC motor unit, digital read-outs (current, voltage, wire feed) and synergic parameter settings were programmed, tested and implemented into the synergic welding device prototype. This project terminated in October 2003.

International project

IST 2001 32316 INES - Industrial Embedded systems Leader: Aleksej Jerman Blažič (SETCCE - Security Technology Competence Centre) Process Automation Laboratory AU - 23

Participants: Assoc. Prof. Dr. Boris Tovornik; Asst. Prof. Dr. Nenad Muškinja; Asst. Prof. Dr. Marjan Golob; Aleksander Polutnik, MSc Project partners: SETCCE - Security Technology Competence Centre, GENERA, d. o. o., ULTRA Company Financed by: European Commision, Information Systems Technology

Duration: Oct. 2002 to Dec. 2003

INES, Industrial Embedded Systems, was a European Commission funded project within the 5th Framework Programme with a duration of 24 months starting from 1st January 2002.. Submitted under the IST Key Action 4.2.4 “Computing, Communications and networks”, INES was a Take-up measure promoting the introduction of leading edge Open Source for Embedded systems in European Industrial Small Medium Enterprises. INES was submitted by a pan-European consortium of 6 TECs (Technology Expertise Centres) and 19 User Companies. The project work consisted of the realisation of 19 User Experiments and in the implementation of a strong dissemination activity to promote the use of existing and emerging technologies, specifically Open Source OS and software, in applications with TCP\IP network facilities and for Embedded systems. We were involved in the project as supervisors of two User Experiments: “Intelligent Monitoring and Management of Remote Sites” (BIRD) and “Remote supervision and control using WAP” (WapScada). The objective of the BIRD best practice User Experiment was to demonstrate the best practice use of an embedded TCP/IP communication based system and the adoption of an Open Source Operating System for the remote monitoring of GSM Base stations. WapScada is a complex information system used for information distribution and alarm via e-mail, internet end GSM wireless networks, the latter using SMS and WAP technology. The system was developed as an OpenSource Software using Java programming language. The project was successfully concluded in December 2003.

PUBLICATIONS

Marjan Golob, Arpad Köveš, “Metode umetne inteligence v varilni tehniki,” Varilna teh., Vol. 52, No. 3, pp. 84-97, 2003.

Marjan Golob, Boris Tovornik, “Modeling and control of the magnetic suspension system,” ISA trans., Vol. 42, No. 1, pp. 89-100, 2003.

Nenad Muškinja, “Supervisor control of the real-time fuzzy control systems,” Syst. Anal. Model. Simul., Vol. 43, No. 11, pp. 1569-1580, 2003.

Stojan Peršin, Boris Tovornik, Nenad Muškinja, “OPC-driven data exchange between MATLAB and PLC-controlled system,” Int. j. eng. educ., Vol. 19, No. 4, pp. 586-592, 2003. AU - 24 Process Automation Laboratory

Amor Chowdhury, Marjan Golob, Peter Cafuta, Rajko Svečko, “Robust controller design for position control of the metal ball in magnetic field,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1058- 1063.

Nenad Muškinja, Boris Tovornik, Martin Terbuc, “Use of TCP/IP protocol in industrial environment,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 896-900.

Stojan Peršin, Boris Tovornik, “Real-time implementation of fault diagnosis to a heat exchanger,” SAFEPROCESS 2003: preprints, 5th IFAC Symposium on fault detection, supervision and safety of technical processes, Washington, D.C., USA, Jun. 2003, pp. 1155- 1160.

Stojan Peršin, Boris Tovornik, Nenad Muškinja, “An alternative approach of on-line data acquisition and processing,” International summer school on Advanced control theory and application '2003, Plovdiv-Gabrovo, Bulgaria, Jun. 2003, pp. 8-13.

PRESENTATIONS BY THE LABORATORY MEMBERS

Stojan Peršin: “Winter vacation course,” winter vacation course of automation and robotics: satellite navigation, robotics, mobile robots, intelligent house, Maribor, Slovenia, Feb. 17, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Asst. Prof. Dr. Nenad Muškinja, Reviewer, international conference, IEEE Assoc. Prof. Dr. Boris Tovornik, International Conference on Industrial Technology, Asst. Prof. Dr. Marjan Golob: Maribor, Slovenia, Dec. 10–12, 2003.

Assoc. Prof. Dr. Boris Tovornik: Section chair, special session co-organizer, session co-chair, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Assoc. Prof. Dr. Boris Tovornik, Automation in Industry and Commerce, conference, Asst. Prof. Dr. Nenad Muškinja, organisation and implementation, Maribor, Asst. Prof. Dr. Marjan Golob, Slovenia, Apr. 10–11, 2003. Alojz Hojnik, Stojan Peršin: Process Automation Laboratory AU - 25

Asst. Prof. Dr. Marjan Golob: Reviewer for ISA Transactions, referee of a scientific article.

Asst. Prof. Dr. Marjan Golob: Reviewer for Applied Soft Computing, referee of a scientific articles.

VISITS TO OTHER INSTITUTIONS

Assoc. Prof. Dr. Boris Tovornik: Scientific collaboration within the framework of the RoboLab project, several visits., scientific collaboration, Zagreb, Croatia, Nov. 28, 2003.

GUESTS AND VISITORS

Tanja Krivo, Exchange of students in the CEEPUS CZ-103 Lidija Antunović programme, postgraduate research work, Mar. 10 (Faculty of Electrical Engineering, to July 10, 2003. Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia):

Darko Stipaničev Exchange of professors in the CEEPUS CZ-103 (Faculty of Electrical Engineering, programme, research work, Apr. 17 to May 16, Mechanical Engineering and Naval 2003. Architecture, University of Split, Split, Croatia):

Petr Krupansky Exchange of students in the CEEPUS CZ-103 (Faculty of Electrical Engineering and programme, postgraduate research work, May 5– Communication, Brno University of 31, 2003. Technology, Brno, Czech Republic):

Frantisek Zezulka Exchange of professors in the CEEPUS CZ-103 (Faculty of Electrical Engineering and programme, postgraduate research work, June 8– Communication, Brno University of 20, 2003. Technology, Brno, Czech Republic):

Albena Taneva Exchange of students in the CEEPUS CZ-103 (Technical University of Sofia - Branch programme, postgraduate research work, Oct. 1 to AU - 26 Process Automation Laboratory

Plovdiv, Plovdiv, Bulgaria): Dec. 31, 2003.

Zoran Vukić, Bilateral cooperation between Process Automation Ljubomir Kuljača Laboratory and Department of Control and (Department of Control and Computer Computer Engineering in Automation, University of Engineering and Automation, Faculty Zagreb, several visits per year, scientific of Electrical Engineering and collaboration, Dec. 18, 2003. Computing, University of Zagreb, Zagreb, Croatia):

Measurements Laboratory AU - 27

MEASUREMENTS LABORATORY

Head: Assoc. Prof. Dr. Vojko Matko Phone: +386 2 220 71 11 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

LEM - GPSPB Primerjava merjenja pozicije objekta ob uporabi GPS signalov in različnih baz podatkov (Comparing Measurements of Objects' Positions using GPS Signals and Various Databases) Leader: Assoc. Prof. Dr. Vojko Participants: Darko Hercog Project partners: Autronic, d. o. o. The aim of this project is to compare the measurements of objects’ positions using various databases such as Jeppersen, Autoroute, “Atlas Slovenije” and various GPS signal receivers. The moving object has no fixed reference point and does not transmit any signals. It is possible to determine the position, velocity and direction of movement with a correlation measurement of digitally coded mutually delayed satellite signals, and to predict the position of an object in space coordinates over a given time. The use of various databases provides a more complex picture of any error occurring in such positional measurements. The goal of this research is to determine GPS system measurement uncertainty for measurements in Slovenia. AU - 28 Measurements Laboratory

Applied projects

LEM - MDMIEMIF Merjenje digitalnih motenj in izbira EMI filtrov (Measurement of digital disturbances and EMI solutions) Leader: Assoc. Prof. Dr. Vojko Matko Participants: Marko Podberšič Project partners: Iskra Emeco Kranj Financed by: Ministry of Defence

Based on electromagnetic compatibility, this research work is concerned with a microprocessor module developed on a printed circuit board. In designing the board, the EMC design rules will be applied for printed circuit board design and element selection. Following faultless functional functioning, the EM measurements showed excessive radiation. The latter can be limited by special EMI filters, which have to be optimized to specific electromagnetic ranges. To this end, special simulation approaches will be designed to attenuate disturbances in various frequency spectrums. A simulation model will be designed for every measurement using Multisim and Mcad tools. The measurements of parameters for disturbance identification will be used for the rise time, and FTT signal method at the point where the signal enters the line. This data will serve as a basis for determination of the characteristic frequency, observed as EMI. The real filter with maximum attenuation at the characteristic frequency will be chosen from the corresponding EMI filter series.

Industrial projects

LEM - OCMSAP Odzivni čas meritev v SAP programskem okolju (Response time measurement inside SAP programme aplications) Leader: Assoc. Prof. Dr. Vojko Matko Participants: Dr. Bojan Gergič, Darko Hercog Project partners: Prevent, d. o. o. Financed by: Prevent, d. o. o.

An SQL server’s response speed to a higher frequency will be measured with the help of a test application (Java applet). To this end, a test database with various record lengths will be selected and the worst test case will be determined. The SQL development tool and stand- alone applications will be applied. ABAP/4 computer programme language development directions in relation to new Java software solutions will be researched with the help of the Internet. The areas of measurements and testing in the new development applications will also be researched. The user interface (Query) for data exchange in an SQL database will be Measurements Laboratory AU - 29

developed. Previous solutions and application responsiveness in the case of increased data quantity will be reviewed as well.

Completed research projects 2003

Research and development project

LEM - PMSMR Prenosni merilni sistem za merjenje raztezkov (Portable measurement system for strain measurement) Leader: Assoc. Prof. Dr. Vojko Participants: Darko Hercog, Boštjan Bertalanič Duration: Mar. to Sept. 2003

A portable measurement system for measuring strain will be developed using strain gauges. This measurement system consists of the Hewlett Packard VXI system with an E1406A command module, 1410A multimeter module and a laptop computer with the GPIB PCMCIA card. Communication between the VXI system and the laptop computer is realized with the GPIB bus, while the algorithm has been developed in LabVIEW. The developed virtual instrument enables bridge type selection (quarter, half, full, etc.), strain gauge parameter setting (gauge factor, Poisson’s ration, dimensions, etc.) and measurement data storage in a file or Access database.

Industrial project

LEM - SEUDZ Merjenje specifične električne upornosti daljnovodnih žic (Measurement of Specific Electrical Resistance of Power Lines) Leader: Assoc. Prof. Dr. Franc Jakl, Ladislav Mikola, MSc Participants: Dr. Bojan Gergič, Miloš Vute, Stanislav Lampič Financed by: Elektro - Slovenia, d. o. o.

Duration: Jan. to Mar. 2003

Specific electrical conductivity of a transmission power line conductor with cross-sectional area of 490/65 mm2 is calculated from the measured conductor’s electrical resistance, cross sectional area and length. The result obtained at the measurement temperature is converted to a temperature of 20 °C. A virtual instrument for resistivity measurement was developed to perform measurement in line with the U-I method. The power supply is a regulated DC AU - 30 Measurements Laboratory

current source. The current through the power line conductor is measured indirectly as a drop of voltage on the resistance etalon, while the voltage drop is measured with the help of a special device in which the conductor is fixed. Separate current and voltage connectors are used to exclude the resistance of connecting wires and the contacts. The temperature of the voltage connectors must be the same to exclude the influence of thermovoltage. In addition, the measurement current is limited to 1 A, so that the influence of voltage change due to the heating of a conductor caused by current flow can be neglected. At this current, the voltage drops in the conductor and the resistance etalon amounts to only a few mV and are, therefore, amplified and filtered with a SCXI measuring system before the A/D conversion. Resistance is given as an arithmetic mean value of 1,000 measurements, measured by the instrument in one second. Special attention was paid to ensuring measurement accuracy and to the calculation of measurement uncertainty.

Virtual instrument for resistivity measurement of power lines.

LEM – MUM Merjenje upornosti materialov, ki lahko akumulirajo električni naboj (Measuring Resistance of Materials that can Accumulate Electric Charge) Leader: Ladislav Mikola, MSc Participants: Miloš Vute, Stanislav Lampič Project partners: Konus Konex, d. o. o., Konitex, d. o. o. Financed by: Konus Konex, d. o. o., Konitex, d. o. o. Measurements Laboratory AU - 31

Duration: Jan. 2001 to Dec. 2003

During this project specific measurement equipment was developed for the measurement of high electrical resistance in accordance to the standard DIN 54245/5.part, 1985. The results of measurements performed for the orderer became more qualitative and their dissipation was significantly reduced. It was established that the standard has to be revised in accordance to the progress of modern measurement techniques and to modify the conditions of measurement which will lead to further improvements in the measurement results.

PUBLICATIONS

Vojko Matko, “Merjenje poroznosti ob uporabi kvarčnih kristalov,” Gradb. vestn., Vol. 52, pp. 39-45, 2003.

Vojko Matko, “Porosity determination using glass test tube,” Electrotechnical Review, Vol. 70, No. 5, pp. 297-303, 2003.

Vojko Matko, “Porosity sensor,” Inf. MIDEM, pp. 73-78, 2003.

Darko Hercog, Milan Čurkovič, Gregor Edelbaher, Evgen Urlep, “Programming of the DSP2 board with the Matlab/Simulink,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 709-713.

Vojko Matko, “Determination of porosity in small solid samples,” Proceedings of the 2003 IEEE International symposium on intelligent control, The Westin Galleria Houston, Texas, USA, Oct. 2003.

Vojko Matko, “Porosity determination by using frequency difference method,” IMTC/03: proceedings of the 20th IEEE Instrumentation and Measurement Technology Conference, Vail Colorado, USA, May 2003.

Vojko Matko, “Porosity measurement by using direct digital method (DDM),” ISIE'2003, 2003 IEEE International Symposium on Industrial Electronics, Rio de Janeiro, Brasil, Jun. 2003.

Vojko Matko, “Porosity sensor by using quartz crystals and two excitation signals,” The 3rd IEEE international workshop on system-on chip for real-time applications (IWSOC'03), Calgary, Alberta, Canada, Jul. 2003.

Marko Podberšič, Matjaž Šegula, Vojko Matko, “Reševanje EMC problematike z balančnimi EMI filtri,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 57-60. AU - 32 Measurements Laboratory

PRESENTATIONS BY THE LABORATORY MEMBERS

Vojko Matko: “Winter vacation course,” winter vacation course of automation and robotics: satelite navigation, robotics, mobile robots, intelligent house, Maribor, Slovenia, Feb. 17, 2003.

Darko Hercog: “Technology transfer day,” use of DSP2 card for control of induction motors, power converters; porting to Matlab/Simulink; advanced tools and procedures for design and testing of servodrives' control algorithms, Maribor, Slovenia, May 27, 2003.

Bojan Gergič: “Natural science and technics day,” natural science and technics day for students of 3rd year of high school. Among others: virtual instruments, mobile robots, teleoperation, 200 participants, Maribor, Slovenia, Sept. 19, 2003.

Darko Hercog: “Basics of induction motors control,” one day seminar for participants from industry, Maribor, Slovenia, Dec. 2, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Ladislav Mikola, MSc: Programme committee member, expert meeting, 24. posvetovanje o močnostni elektrotehniki in sodobnih električnih instalacijah - Kotnikovi dnevi, Radenci, Slovenia, Mar. 27–28, 2003.

Assoc. Prof. Dr. Vojko Matko: Reviewer, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

VISITS TO OTHER INSTITUTIONS

Ladislav Mikola, MSc: 24. posvetovanje o močnostni elektrotehniki in sodobnih električnih instalacijah, meeting participation, Radenci, Slovenia, Mar. 27–28, 2003.

Assoc. Prof. Dr. Vojko Matko: Java measurement applications development research work, research work, Slovenj Gradec, Slovenia, Apr. 3, 2003.

Darko Hercog: Mercedes visit, Stuttgart, Germany, June 2–7, 2003. Measurements Laboratory AU - 33

Darko Hercog, DLR, visit, Wessling, Germany, June 2–7, 2003. Assoc. Prof. Dr. Vojko Matko:

Assoc. Prof. Dr. Vojko Matko: Mercedes visit, Stuttgart, Germany, June 2–7, 2003.

Ladislav Mikola, MSc: Plenary session of TCL, visit to the laboratory and collaboration talk, formal call, Velenje, Slovenia, June 3, 2003.

Dr. Bojan Gergič: Upgrade of the system for recognition of radiators with computer vision, research work, Lenart v Slov. goricah, Slovenia, Sept. 1, 2003.

Dr. Bojan Gergič, Seminar on Computer Vision, seminar participation, Darko Hercog: Ljubljana, Slovenia, Sept. 18, 2003.

Assoc. Prof. Dr. Vojko Matko: Invited lecture IEEE International symposium on intelligent control - ISIC' 03, postdoctoral work, Houston, United States, Oct. 4–11, 2003.

GUESTS AND VISITORS

Marko Podberšič Postgraduate research work, postgraduate (Ministry of Defence, Ljubljana, research work, Feb. 2, 2003. Slovenia):

Drago Krenker Java measurement applications development, (Prevent d.o.o., Slovenj Gradec, research work, Mar. 23, 2003. Slovenia):

Stane Kodba Measurement of nonlinear phenomena, scientific (II. high school Maribor, 2000 Maribor, collaboration, June 2 to Dec. 17, 2003. Slovenia):

Andreas Böer Exchange of students in the IAESTE programme, (University of Karlsruhe, 76131 visit, June 18 to Aug. 18, 2003. Karlsruhe, Germany):

Darko Lihteneker Further lab equipment development, visit, Nov. 10, AU - 34 Measurements Laboratory

(Šolski center Velenje, Velenje, 2003. Slovenia):

Srečko Podveržen Research work, Dec. 5, 2003. (Šolski center Velenje, Velenje, Slovenia):

Samo Uršej New JAVA measurement applications development, (Prevent d.o.o., Slovenj Gradec, visit, Dec. 22, 2003. Slovenia):

DECORATIONS, AWARDS, AND HONOURS

Stanislav Lampič, Miloš Vute: bronze Medal of the University of Maribor, Maribor, Slovenia, Oct. 15, 2003. Electro-Optics and Sensor Systems Laboratory AU - 35

ELECTRO-OPTICS AND SENSOR SYSTEMS LABORATORY

Head: Assoc. Prof. Dr. Denis Đonlagić Phone: +386 2 220 71 17 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

FOVAD Optični vlakenski detektorji osi (Fiber optic vehicle axle detectors) Leader: Assoc. Prof. Dr. Denis Đonlagić Participants: Edvard Cibula, MSc; Marjan Hanč Project partners: Mikrobit, d. o. o. Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Mikrobit, d. o. o.

In this year we usefully concluded the design and installation of the first seven prototypes of fibre optic axle detectors. The installation was completed at a test polygon near Hoče. We tested Michelson interferometers, Sagnac interferometers and a measurement system based on direct time delay assessment. The first results demonstrated the feasibility of all three principles.

MOMKT Miniaturni optični merilnik krvnega tlak (Miniature optical blood pressure sensor) Leader: Assoc. Prof. Dr. Denis Đonlagić, Edvard Cibula, MSc Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia AU - 36 Electro-Optics and Sensor Systems Laboratory

We concluded the first development phase of a miniature optical pressure sensor prototype for bio-medical applications. The essential element is a thin polymer diaphragm that is positioned inside the hollow end of the standard optical fibre 125 µm in diameter, which forms a Fabry-Perot interferometer. The cavity at the fiber end is made by a micromachining process based on wet etching of the SiO2+GeO2 composite of the optical fibre.

Fiber optics MEMS pressure sensor.

OFFPSS Optični merilniki raztezkov na osnovi vlakenskega Fabry- Perotovega interferometra (Fiber optic strain sensors based on in-line Fabry-Perot interferometer) Leader: Assoc. Prof. Dr. Denis Đonlagić, Edvard Cibula, MSc Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

The aim of this project is the development of a fibre-optic strain sensor based on Fabry-Perot air cavity that is created inside a single-mode fibre micromachining technique. The sensor features linear response, low transmission loss, low temperature dependence, easy fabrication and it can be applied in quasi-distributed networks by using standard OTDR interrogation.

PUBLICATIONS

Denis Đonlagić, Marjan Hanč, “A simple fiber-optic vehicle axle detector for roadways,” IEEE trans. veh. technol., Vol. 52, No. 2, pp. 401-405, 2003. Electro-Optics and Sensor Systems Laboratory AU - 37

Denis Đonlagić, Marjan Hanč, “Vehicle axle detector for roadways based on fiber optic interferometer,” Smart structures and materials 2003, Smart sensor technology and measurement systems, San Diego, California, USA, Mar. 2003, pp. 317-321.

Scott R. Bickham, Denis Đonlagić, “Dispersion compensation optical fiber and optical transmission line, United States patent application publication,” No. US 2002/0174987 A1, Sep. 2003.

Scott R. Bickham, Denis Đonlagić, “Dispersion compensation optical fiber and optical transmission line including the same: International application published under the Patent Cooperation Treaty (PCT),” World Intellectual Property Organization, International Bureau, No. WO 03/079078 A2, Sep. 2003.

Denis Đonlagić, “Optical transmission link with low bending loss: International application published under the Patent Cooperation Treaty (PCT),” World Intellectual Property Organization, International Bureau No. WO 03/054603 A1, Jul. 2003.

Institute of Electronics EL – 1

INSTITUTE OF ELECTRONICS

Head: Prof. Dr. Bogomir Horvat Phone: +386 2 220 72 00 E-mail: [email protected] URL: http://www.elektronika.uni-mb.si

The Institute of Electronics has 37 full-time and 4 part-time employees including 3 full professor, 3 associate professors, 5 assistant professors, 2 lecturers, assistants, researchers, and technical staff. The main activities of the Institute of Electronics are teaching graduate and postgraduate courses and research. Research is currently focused on one fundamental research project, which is financed by the Ministry of School, Science and Sport of the Republic of Slovenia, projects with local industry, six international projects and projects with foreign industry partners.

In 2003, the Institute of Electronics staff published 54 papers presenting the findings of its research, organised meetings and conferences, and visited several institutes. The primary areas of study at the Institute of Electronics are multimedia systems, digital signal processing, speech recognition, language technology, formal verification of distributed systems, electronic circuits, digital filters, and microcomputer structures. EL – 2 Institute of Electronics

Members of the Institute of Electronics are organised into four laboratories and two centres of technology.

Institute of Electronics Head: Prof. Dr. Bogomir Horvat

Digital Information Electronics Systems Systems Laboratory Laboratory Head: Head: Prof. Dr. Bogomir Horvat Assoc. Prof. Dr. Rudolf Babič

Microcomputer Digital Signal Systems Processing Laboratory Laboratory Head: Head: Prof. Dr. Zmago Brezočnik Prof. Dr. Zdravko Kačič Institute of Electronics EL – 3

Digital and Information Systems Laboratory

Head: Prof. Dr. Bogomir Horvat

Employees: Assoc. Prof. Dr. Marko Jagodič; Asst. Prof. Dr. Mitja Solar; Asst. Prof. Dr. Janez Stergar; Rado Slatinek, MSc; Dr. Iztok Kramberger; Dr. Andrej Žgank; Tomaž Rotovnik, BSc; Dušan Prelog, BSc; Damjan Vlaj, BSc; Aleksandra Zögling Markuš, Ing.

Microcomputer Systems Laboratory

Head: Prof. Dr. Zmago Brezočnik

Employees: Assoc. Prof. Dr. Tatjana Kapus; Bogdan Dugonik, MSc; Dr. Aleš Časar; Filip Samo Balan, MSc; Andrej Kruščič, BSc; Robert Meolic, MSc; Boštjan Vlaovič, BSc; Peter Vicman, BSc; Aleksander Vreže, BSc

Digital Signal Processing Laboratory

Head: Prof. Dr. Zdravko Kačič

Employees: Dr. Mirjam Sepesy Maučec; Asst. Prof. Dr. Matej Rojc; Marcel Ogner, Ing.; Srečko Grašič, BSc; Dr. Vladimir Hozjan; Bojan Kotnik, BSc; Darinka Verdonik, prof. slov., Janez Kitak, BSc;

Centre for Language Technologies

Head: Prof. Dr. Zdravko Kačič

Electronic Systems Laboratory

Head: Assoc. Prof. Dr. Rudolf Babič

Employees: Assoc. Prof. Dr. Tomaž Dogša; Asst. Prof. Dr. Franc Jurkovič; Gerhard Angleitner, MSc; Asst. Prof. Dr. Bojan Jarc; Dr. Matej Šalamon; Davorin Osebik, MSc; Branko Drevenšek, BSc; Anton Vesenjak, Ing.

Centre for Verification and Validation of Systems

Head: Assoc. Prof. Dr. Tomaž Dogša EL - 4 Digital and Information Systems Laboratory

DIGITAL AND INFORMATION SYSTEMS LABORATORY

Head: Prof. Dr. Bogomir Horvat Phone: +386 2 220 72 00 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

POLIDAT Telefonska govorna baza POLIDAT (Telephone Speech database POLIDAT) Leader: Prof. Dr. Bogomir Horvat Participants: Prof. Dr. Zdravko Kačič, Asst. Prof. Dr. Matej Rojc, Aleksandra Zögling Markuš The goal of this project is to create speech databases recorded over fixed and mobile telephone networks that will be used for the development and testing of real life automatic telephone speech dialogue systems. Databases will have good coverage of applications, languages, speaking styles, and different environments. These databases will contain the voices of 1000 speakers recorded over fixed and mobile phones. Currently the database containes the speach of 500 speakers from a fixed telephone network and the speech of 500 speakers from mobile telephone networks.

International projects

VVIGTO Evaluation of multilingual speech resources and tools Leader: Prof. Dr. Bogomir Horvat Participants: Prof. Dr. Zdravko Kačič, Dr. Mirjam Sepesy Maučec, Asst. Prof. Dr. Matej Rojc, Asst. Prof. Dr. Janez Stergar, Dr. Vladimir Hozjan, Dr. Digital and Information Systems Laboratory EL - 5

Andrej Žgank, Tomaž Rotovnik, Bojan Kotnik Financed by: Ministry of Science and Technology of the Republic of Slovenia, Ministry of External Affairs of Spain

The goal of the project is to gain new knowledge and experience in the field of multilingually spoken language resources and automatic speech recognition. The focus of the proposed cooperation is the analysis and evaluation of language resources and methods for acoustic– phonetic modelling. This research also includes methods of language modelling based on an independent language approach, i.e. statistical language modelling. The experimental work is based on the use of SpeechDat databases for Spanish and Slovenian languages. An exchange of researchers from both institutions occured over a period of two months.

PUBLICATIONS

Bojan Imperl, Zdravko Kačič, Bogomir Horvat, Andrej Žgank, “Clustering of triphones using phoneme similarity estimation for the definition of a multilingual set of triphones,” Speech commun., Vol. 39, No. 3/4, pp. 353-366, 2003.

August Jauk, Marko Bonač, Igor Ozimek, Gorazd Kandus, “Academic and research network of Slovenia,” Comput. commun., Vol. 26, pp. 444-450, 2003.

Bojan Kotnik, Damjan Vlaj, Bogomir Horvat, “Efficient noise robust feature extraction algorithms for distributed speech recognition (DSR) systems,” Int. j. speech technol., Vol. 6, No. 3, pp. 205-219, 2003.

Iztok Kramberger, Zdravko Kačič, “Izvedba parametričnega nelinearnega filtra za iskanje kožnih značnic v digitalni sliki z FPSLIC tehnologijo,” Inf. MIDEM, Vol. 33, No. 1(105), pp. 14- 23, 2003.

Mihael Mohorčič, Gorazd Kandus, “Strategije nadzora dostopa do satelitskih kanalov vintegriranem sistemu satelitskih in prizemnih mobilnih komunikacij,” Electrotechnical Review, Vol. 70, No. 1-2, pp. 52-58, 2003.

Mihael Mohorčič, Gorazd Kandus, Jurij F. Tasič, NikolaRožić, “Negeostacionarne satelitske konstelacije za dostop do širokopasovnih komunikacijskih storitev,” Electrotechnical Review, Vol. 70, pp. 240-245, 2003.

Mihael Mohorčič, Aleš Švigelj, Gorazd Kandus, Y. Fun Hu, Ray E. Sheriff, “Demographically weighted traffic flow models for adaptive routing in packet-switched non-geostationary satellite meshed networks,” Comput. networks (1999), Vol. 43, pp. 113-131, 2003. EL - 6 Digital and Information Systems Laboratory

Mirjam Sepesy Maučec, Zdravko Kačič, Bogomir Horvat, “Modelling highly inflected languages,” Inf. sci., 2003.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Melita Zemljak, “Modelling highly inflected Slovenian language,” Int. j. speech technol., Vol. 6, No. 3, pp. 245-257, 2003.

Mitja Solar, Rudolf Babič, Bruno Stiglic, “Izbira optimalnih podstruktur nerekurzivnega digitalnega sita v porazdeljeni aritmetiki,” Electrotechnical Review, Vol. 70, No. 4, pp. 227-233, 2003.

Janez Stergar, Vladimir Hozjan, Bogomir Horvat, “Labeling of symbolic prosody breaks for the Slovenian language,” Int. j. speech technol., Vol. 6, No. 3, pp. 289-299, 2003.

Janez Stergar, Tomaž Rotovnik, Zdravko Kačič, “Information retrieval through speech in an multimedia authoring tool,” Informatologia (Zagreb), 36, 2, pp. 83-89, 2003.

Andrej Šoštarič, Bojan Imperl, Boro Jeřabek, “Home automation on the move,” Inf. MIDEM, Vol. 33, No. 2, pp. 100-104, 2003.

Denis Trček, Gorazd Kandus, “Information systems security policy - human factor modelling and simulation,” WSEAS Trans. Comput., Vol. 2, pp. 339-342, 2003.

Denis Trček, Gorazd Kandus, “Trust management in E-business systems - from taxonomy to trust engine architecture,” WSEAS Trans. Syst., Vol. 2, pp. 151-155, 2003.

Jan Vcelak, Tomaž Javornik, Jan Sykora, Gorazd Kandus, Srečo Plevel, “Multiple-input multiple-output wireless systems,” Electrotechnical Review, Vol. 70, pp. 234-239, 2003.

Andrej Žgank, Matej Rojc, “"Lentinfo" information - providing system for the Festival Lent programme,” Int. j. speech technol., Vol 6, No. 3, pp. 233-244, July 2003.

Tomaž Javornik, Gorazd Kandus, Srečo Plevel, Tomaž Slivnik, “Impact of imperfect channel knowledge on adaptive MIMO system performance,” V: Electrical and computer engineering series, A series of reference books and textbooks, pp. 51-61, 2003.

Tomaž Rotovnik, Mirjam Sepesy Maučec, “Razpoznavanje slovenskega govora z razširjenimalgoritmom ROVER,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e-zbornik, Ljubljana, Društvo mladih raziskovalcev Slovenije, pp. 332-341, 2003.

Mirjam Sepesy Maučec, Tomaž Rotovnik, “Statistično modeliranje slovenskega jezika z uporabo osnovnih enot manjših od besede,” Raziskovalno delo podiplomskih študentov v Digital and Information Systems Laboratory EL - 7

Sloveniji - ena znanost: e-zbornik, Ljubljana, Društvo mladih raziskovalcev Slovenije, pp. 218- 225, 2003.

Janez Stergar, “Podatkovno vodeni pristop napovedovanja prozodičnih mej z arhitekturami nevronskih mrež,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e- zbornik, Ljubljana, Društvo mladih raziskovalcev Slovenije, pp. 415-423, 2003.

Andrej Žgank, “Akustična adaptacija prenesenega avtomatskega večjezičnega razpoznavalnika govora,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e-zbornik, Ljubljana, Društvo mladih raziskovalcev Slovenije, pp. 461-470, 2003.

Janez Stergar, Bogomir Horvat, Zdravko Kačič, “Data driven symbolic prosody modeling,” Proceedings of the 15th International Congress of Phonetic Sciences [also] 15th IcPhS, Barcelona, Spain, Aug. 2003, pp. 51-54.

Mladen Despotović, Bojan Imperl, Chrystian Barragan, “E-uprava naprej od spletnih meja,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 443-448.

Tomaž Javornik, Gorazd Kandus, Srečo Plevel, “Adaptive modulation scheme for the land mobile satellite chanenel,” Proceedings of the First International Conference on Advanced Satellite Mobile Systems, ASMS 2003, Frascati, Italy, Jul. 2003.

Tomaž Javornik, Gorazd Kandus, Srečo Plevel, Tomaž Slivnik, “Impact of imperfect channel knowledge on adaptive MIMO system performance,” Proceedings of the 7th WSEAS International Multiconference CSCC [on] Circuits, Systems, Communications and Computers, Corfu Island, Greece, Jul. 2003.

Tomaž Javornik, Gorazd Kandus, Srečo Plevel, G.P. White, A. G. Burr, “V-BLAST algorithm performance in non-linear channel,” The IEEE Region 8 EUROCON 2003: computer as a tool, Sep. 2003, Ljubljana, Slovenia, Vol. A, pp. 183-187.

Gorazd Kandus, Mihael Mohorčič, “Provision of wireless access over high altitude platforms,” International Conference on Computer, Communication and Control Technologies, CCCT'03 and the 9th International Conference onInformation Systems Analysis and Synthesis ISAS'03, Orlando , Florida, USA, Aug. 2003, Vol. 2, pp. 225-230.

Gorazd Kandus, Aleš Švigelj, Mihael Mohorčič, “The impact of different scheduling policies of traffic class dependent routing in intersatellite link network,” Proceedings of the First International Conference on Advanced Satellite Mobile Systems, ASMS 2003, Frascati, Italy,.jul. 2003. EL - 8 Digital and Information Systems Laboratory

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Noise robust speech parameterization based on joint wavelet packet decomposition and autoregressive modeling,” Eurospeech'03: proceedings of the 8th European conference on speech communication and technology, Geneva, Switzerland, Sep. 2003, pp. 1793-1796.

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “The usage of wavelet packet transformation in automatic noisy speech recognition systems,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 131-134.

Mihael Mohorčič, Aleš Švigelj, Gorazd Kandus, Jurij F. Tasič, “Postopki usmerjanja v medsatelitskem paketnem omrežju,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e-zbornik, Ljubljana, Društvo mladih raziskovalcev Slovenije, pp. 243-253, 2003.

Srečo Plevel, Tomaž Javornik, Gorazd Kandus, Roman Trobec, “Adaptive data mapping of wavelet compressed images in MIMO systems,” Proceedings EC-VIP-MC 2003, 4th EURASIP conference focused on video image processing and multimedia communications, Zagreb, Croatia, Jul. 2003, pp. 387-392.

Tomaž Rotovnik, Mirjam Sepesy Maučec, “Large vocabulary continuous speech recognition used with the Slovenian language,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, July 2002, pp. 107-116.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “Slovenian large vocabulary speech recognition with data-driven models of inflectional morphology,” Proceedings of 2003 IEEE Workshop on Automatic speech recognition and understanding [also] ASRU 2003, St. Thomas, U.S. Virgin Islands, Dec. 2003, pp. 83-88.

Tomaž Rotovnik, Janez Stergar, Bogomir Horvat, “Implementing external applications in an multimedia authoring environment,” The IEEE Region 8 EUROCON 2003: computer as a tool, Sep. 2003, Ljubljana, Slovenia, Vol. 2, pp. 135-139.

Peter Rulić, Iztok Kramberger, “Six degrees of freedom stereo vision inside-out tracking,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 52-56.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Zdravko Kačič, Bogomir Horvat, “Large vocabulary speech recognition of Slovenian language using morphological models,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 158-161.

Janez Stergar, Bogomir Horvat, “An environment for word prominence classification in Slovenian language,” Proceedings of the 15th International Congress of Phonetic Sciences [also] 15th IcPhS, Barcelona, Spain, Aug. 2003, pp. 2087-2090. Digital and Information Systems Laboratory EL - 9

Janez Stergar, Vladimir Hozjan, Bogomir Horvat, “First approaches in word prominence prediction,” Proceedings, Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 195-202.

Marjan Sušelj, Tomaž Marčun, Denis Trček, Gorazd Kandus, “Application of PKI in health care - needs, ambitions, prospects,” The new navigators: from professional to patients: proceedings of MIE2003, Vol. 95, pp. 188-199.

Aleš Švigelj, Mihael Mohorčič, Gorazd Kandus, “Oscillation suppression link-cost function for adaptive routing in packet-switched ISL network,” Ninth Ka and Broadband Communications Conference, Lacco Ameno/Island of Ischia, Italy, Nov. 2003, pp. 155-162.

Aleš Švigelj, Mihael Mohorčič, Gorazd Kandus, “Traffic class dependent routing in ISL network with adaptive forwarding based on local link load information,” Satellite communications-from fade mitigation to service provision: international workshop of COST actions 272 and 280, Noordwijk, The Netherlands, May 2003, pp. 395-402.

Jari Turunen, Damjan Vlaj, Pekka Loula, Bogomir Horvat, “Speech coding parameters and their influence on speech recognition,” WSEAS conference proceedings, 2003.

Damjan Vlaj, Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Usage of frame dropping and frame attenuation algorithms in automatic speech recognition systems,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 149-152.

Andrej Žgank, “Port of multilingual triphone acoustic models to Italian language,” Proceedings, Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 99-105.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Comparison of acoustic adaptation methods in multilingual speech recognition environment,” Text, speech and dialogue: 6th International Conference, TSD 2003, České Budějovice, Czech Republic, Sep. 2003: pp. 245-250.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Data driven generation of broad classes for decision tree construction in acoustic modeling,” Eurospeech'03: proceedings of the 8th European conference on speech communication and technology, Geneva, Switzerland, Sep. 2003, pp. 2505-2508.

PRESENTATIONS BY THE LABORATORY MEMBERS

Bogomir Horvat, Andrej Žgank: “Speech technologies - TELEINFOS 2003,” introduction to Speech technologies on Teleinfos 2003, Ljubljana, Slovenia, Apr. 9, 2003. EL - 10 Digital and Information Systems Laboratory

Andrej Žgank: “Student conference "Prihodnost so storitve",” participation at a student conference "Prihodnost so storitve" - Teleinfos 2003, Ljubljana, Slovenia, Apr. 9, 2003.

Bogomir Horvat: “Invited lecture at Univesity of Zadar,” invited lecture on mobile telecomunications, Zadar, Croatia, June 6, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Bogomir Horvat: AST 2003, international workshop, organisation and implementation, Maribor, Slovenia, June 3–5, 2003.

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Bogomir Horvat, Visit to Technical University of Graz, Graz, Austria, Asst. Prof. Dr. Janez Stergar: Apr. 22, 2003.

Prof. Dr. Bogomir Horvat: Visit to VITEL workshop, BRDO, Slovenia, May 18– 20, 2003.

Prof. Dr. Bogomir Horvat, Visit to Jožef Stefan Institute, Ljubljana, Slovenia, Asst. Prof. Dr. Janez Stergar: June 6–8, 2003.

Prof. Dr. Bogomir Horvat: Visit to University of Graz, Graz, Austria, June 13, 2003.

Dr. Vladimir Hozjan, Visit to the international conference EUROSPEECH Bojan Kotnik, 2003, seminar participation, Martigny, Switzerland, Dr. Andrej Žgank: Aug. 1–4, 2003.

Asst. Prof. Dr. Janez Stergar: The 15th Internatinal Congress of Phonetic Sciences, meeting participation, Barcelona, Spain, Aug. 3–9, 2003.

Dr. Andrej Žgank: Visit to the international conference Text, Speech and Dialogue 2003, seminar participation, Pilsen, Czech Republic, Aug. 8–12, 2003.

Prof. Dr. Bogomir Horvat: Participation at the international Communication Course & Conference "MEDIA AND SOCIETY", Digital and Information Systems Laboratory EL - 11

seminar participation, Dubrovnik, Croatia, Aug. 24– 28, 2003.

Prof. Dr. Bogomir Horvat, Visit to the University of Graz, Graz, Austria, Sept. Asst. Prof. Dr. Janez Stergar: 2, 2003.

Tomaž Rotovnik, Visit to the international conference EUROCON Damjan Vlaj: 2003, meeting participation, Ljubljana, Slovenia, Sept. 22–24, 2003.

Prof. Dr. Bogomir Horvat: Visit to workshop VIable TELecommunications (VITEL), BRDO, Slovenia, Nov. 17–18, 2003.

Tomaž Rotovnik: Proceedings of 2003 IEEE Workshop on Automatic speech recognition and understanding ASRU 2003, meeting participation, Piscataway, United States, Nov. 30 to Dec. 4, 2003.

EL - 12 Electronic Systems Laboratory

ELECTRONIC SYSTEMS LABORATORY

Head: Assoc. Prof. Dr. Rudolf Babič Phone: +386 2 220 72 30 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

IADSSPLV Izvedba adaptivnih digitalnih sit s programirnimi polji logičnih vezij (Adaptive Digital Filter Realization with Field Programmable Gate Arrays) Leader: Assoc. Prof. Dr. Rudolf Babič Participants: Davorin Osebik, MSc The main aim of this permanent project is the realization of higher-order, adaptive nonrecursive digital filters with field-programmable gate arrays, and FPGA circuits. We found that distributed arithmetic is well suited for this research. The scope of our research is the investigation of distributed arithmetic structures with ROM-accumulator architecture, distributed arithmetic structures with online calculation of partial coefficients sums and a digital FIR filter in the concentrated arithmetic. This implementation of FIR filter uses parallel multipliers or serial multipliers. They have ROM capabilities as low as possible and also offer the realization of higher-order, nonrecursive digital filters with high-speed operation. A sampling frequency of 400 kHz was obtained using XILINX 4000 FPGA circuits for realization of digital filter. We are searching for appropriate structure design that would allow implementation of an online calculation of coefficients partial sums with programmable gate arrays working at highest possible speed. Simultaneously with the development of FIR digital filter structures, we are working on the implementation of adaptive algorithms with FPGA circuits. We have developed structures Electronic Systems Laboratory EL - 13

allowing implementation of required numerical calculations with FPGAs due to limited ability for execution of arithmetic operations with FPGA circuits,. We would like to emphasize the implementation of a sequence of 16 multipliers linked to a group of 16 sequential adders. We used the above described structures to design an adaptive filter with online calculation of the coefficients partial sums together with an LMS algorithm, which is simple enough for realization in FPGA distributed arithmetic. This filter is used for the extraction of signal from a background noise. We achieved 100 kHz input sampling frequency with this adaptive FIR filter featuring 16 coefficients, 16 bit input-output word and 16 bit internal arithmetic, implemented with XILINX series 4000 FPGA. This filter improved signal to noise ratio from 20 to 22 dB.

PRVŠSARG Povečanje robustnosti na vhodni šum v sistemih avtomatskega razpoznavanja govora (Improvement of automatic speech recognition noise robustness) Leader: Assoc. Prof. Dr. Rudolf Babič Participants: Asst. Prof. Dr. Bojan Jarc The purpose of this project is the development of preprocessing methods to improve automatic speech recognition in noisy environments. Within the scope of this project we are developing methods of noise estimation in speech presence and statistical methods of speech estimation. Methods efficiency is evaluated using Aurora 2 in Aurora 3 databases. This project is developed according to directives of the European Telecommunications Standard Institute - ETSI for distributed speech recognition over the mobile cellular network. In the year 2003 we've given a theoretical basis for determination of a linear Gauss model- based estimator of an amplitude spectrum. We have developed a linear estimator modification method with which automatic speech recognition can be improved. Since speech is not always present we have defined a likely ratio-based nonlinear function with which further automatic speech recognition improvement was achieved.

Research and development projects

TSIM Testiranje SPICE simulatorjev (SPICE simulator testing) Leader: Assoc. Prof. Dr. Tomaž Dogša Participants: Dr. Matej Šalamon, Branko Drevenšek SPICE circuit simulators are indispensable tools for integrated circuits design and for a variety of scientific research activities. The complexity of a simulator's programme code is EL - 14 Electronic Systems Laboratory

constantly rising. The probability of anomalies is consequently getting higher. The purpose of this project is to reveal unknown anomalies and enlarge the CircuitSim90 benchmark suite. Testing simulators with circuits of CircuitSim90 benchmark suite did not expose any repeatability problems. We have discovered that chaotic circuits are more efficient for the detection of non-repeatability because they are hypersensitive to the initial conditions. Chua’s oscillator was selected as a representative member of the chaotic circuits.

Industrial projects

POINT1 Primerjalna analiza izbranih SPICE simulatorjev (Comparison of selected SPICE simulators) Leader: Assoc. Prof. Dr. Tomaž Dogša Participants: Dr. Matej Šalamon; Branko Drevenšek; Asst. Prof. Dr. Bojan Jarc; Assoc. Prof. Dr. Rudolf Babič; Davorin Osebik, MSc; Asst. Prof. Dr. Mitja Solar Financed by: Gorenje, d. d., Program Point

A task of the research department of Gorenje Point is to design and test electronic modules for home appliances. They want to raise the quality of their design by the use of CAE/CAD tools. The aims of our collaboration with the research department of Gorenje Point are: 1. Selection of the most suitable SPICE simulator. 2. Introducing a SPICE simulator in the development cycle. In December a short preliminary study was done of all SPICE simulators that are on the market. We also analyzed the current development model used in the Gorenje Point company.

PUBLICATIONS

Mirjam Sepesy Maučec, Zdravko Kačič, Bogomir Horvat, “Modelling highly inflected languages,” Inf. sci., 2003.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Melita Zemljak, “Modelling highly inflected Slovenian language,” Int. j. speech technol., Vol. 6, No. 3, pp. 245-257, 2003.

Mitja Solar, Rudolf Babič, Bruno Stiglic, “Izbira optimalnih podstruktur nerekurzivnega digitalnega sita v porazdeljeni aritmetiki,” Electrotechnical Review, Vol. 70, No. 4, pp. 227-233, 2003. Electronic Systems Laboratory EL - 15

Tomaž Rotovnik, Mirjam Sepesy Maučec, “Razpoznavanje slovenskega govora z razširjenim algoritmom ROVER,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e- zbornik, Ljubljana, Slovenia, Društvo mladih raziskovalcev Slovenije, pp. 332-341, 2003.

Bojan Jarc, Rudolf Babič, “Improving automatic speech recognition with noise variance estimation between the harmonic spectral peaks,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 167-176.

Dejan Jovanović, Tomaž Dogša, “Comparison of software development models and their usage in computer-telephony systems,” ConTEL 2003: proceedings of the 7th International Conference on Telecommunications, Zagreb, Croatia, Jun. 2003, Vol. 2, pp. 587-592.

Tomaž Rotovnik, Mirjam Sepesy Maučec, “Large vocabulary continuous speech recognition used with the Slovenian language,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 107-116.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “Slovenian large vocabulary speech recognition with data-driven models of inflectional morphology,” Proceedings of 2003 IEEE Workshop on Automatic speech recognition and understanding [also] ASRU 2003, St. Thomas, U.S. Virgin Islands, Dec. 2003, pp. 83-88.

Mirjam Sepesy Maučec, “On the discovery of data-driven base units for modeling Slovenian language,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 91-97.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Zdravko Kačič, Bogomir Horvat, “Large vocabulary speech recognition of Slovenian language using morphological models,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia: proceedings, Sep. 2003, Vol. 2, pp. 158-161.

Mirjam Sepesy Maučec, Tomaž Rotovnik, “Statistično modeliranje slovenskega jezika z uporabo osnovnih enot manjših od besede,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e-zbornik, Ljubljana, Slovenia, Društvo mladih raziskovalcev Slovenije, pp. 218-225, 2003. EL - 16 Microcomputer Systems Laboratory

MICROCOMPUTER SYSTEMS LABORATORY

Head: Prof. Dr. Zmago Brezočnik Phone: +386 2 220 72 10 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

International projects

SUPPORT LEONARDO da VINCI project: SUPPORT- Training course on sustainable product development Leader: Jurgen Jantschgi (University of Leoben) Participants: Asst. Prof. Dr. Matjaž Debevc; Bogdan Dugonik, MSc Project partners: Creax, AREA Science Park Consortium, Faculty of Electrical Engineering and Computer Science, Fraunhofer Institute Aachen, University of Leoben, Joanneum Research, Graz Financed by: European Union

The aim of this project is to develop and deliver practical and proven SUSTAINABLE INNOVATION TOOL training programmes incorporating the best design methods and practices. After a survey of the needs of the enterprises, a new training course was developed in order to foster the innovation process, upgrade the production system and reduce production costs in a sustainable way.

BITEMA Bilingual Teaching Material for the Deaf by Means of ICT Leader: Niels Nielsen (Castberggaard) Participants: Bogdan Dugonik, MSc; Asst. Prof. Dr. Matjaž Debevc Project partners: Greta Paramedical et Social, Communication Centre for the Deaf and Hard of Hearing, University of Maribor, Castberggaard Microcomputer Systems Laboratory EL - 17

Financed by: European Union

In 2003, we worked on the enhancement of learning tools and learning methods for deaf adults, who have problems when applying for a better job because of their lower level of knowledge or inadequate qualifications. We developed and presented a new Web-based didactical tool to enhance the basic knowledge level of deaf people. Some experimental computer programmes were developed, which could help the tutors of hard of hearing people to integrate their learning materials into the Web. The learning materials should contain video, 3D-animation, videochat, web-chat, and other elements.

Completed research projects 2003

Applied project

2003-EZS-FERI Spletni portal EZS (EZS Web Portal) Leader: Boštjan Vlaovič Participants: Aleksander Vreže, Prof. Dr. Zmago Brezočnik Project partners: Electrotechnical Society of Slovenia Financed by: Electrotechnical Society of Slovenia

Duration: June to Nov. 2003

The Electrotechnical Society of Slovenia regularly organizes conferences, workshops, seminars and other activities for electrotehnical and telecommunication experts. Most of the work is done by volunteer groups from universities and industry. The project objective was the development and implementation of a Web Portal that would provide remote access to all activities linked with the organizational work.

Research and development project

2002-2003-FERI-1 Zagotavljanje povezljivosti MGC in MG po protokolu MGCP (Robust connectivity management of MGC and MG) Leader: Boštjan Vlaovič Participants: Peter Vicman, Aleksander Vreže, Prof. Dr. Zmago Brezočnik Project partners: Iskratel Ltd. EL - 18 Microcomputer Systems Laboratory

Financed by: Iskratel Ltd., Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: July 2002 to Mar. 2003

In 2003 we finalized an analysis of the robust connectivity management between a Media Gateway Controller (MGC) and a Media Gateway (MG). The main objective was to provide stability of communication, even when hardware failure occurs at the local unit or any of the network nodes.

Application for testing MGCP devices and SIP telephone.

2002-2003-FERI- Razvoj protokola SIP-T aneks (Development of SIP-T protocol) Leader: Boštjan Vlaovič Participants: Peter Vicman, Aleksander Vreže, Prof. Dr. Zmago Brezočnik Project partners: Iskratel Ltd. Financed by: Iskratel Ltd., Ministry of Education, Science and Sport of the Republic of Slovenia Microcomputer Systems Laboratory EL - 19

Duration: Apr. to Dec. 2003

Project activities included active involvement in all development phases of the Session Initiation Protocol for Telephones (SIP-T). It is one of the core protocols of the next generation of softswitch SI2000 V6. SIP-T is used for transmission of the PSTN signalling protocols using SIP. The mechanisms detail how SIP provides for both 'encapsulation' (bridging the PSTN signaling across a SIP network) and 'translation' (gatewaying).

PUBLICATIONS

Miran Brezočnik, Jože Balič, Zmago Brezočnik, “Emergence of intelligence in next-generation manufacturing systems,” Robot. comput.-integr. manuf., Vol. 19, No. 1/2, pp. 55-63, 2003.

Matjaž Debevc, Bogdan Dugonik, Ivan Gerlič, “Informacijska družba in izobraževanje gluhih in naglušnih,” Vzgoja in izobraževanje v informacijski družbi, Vol. 36, No. 8, pp. 562-569, 2003.

Robert Meolic, Tatjana Kapus, Bogdan Dugonik, Zmago Brezočnik: “Formal verification of distributed mutual-exclusion circuits”, Inf. MIDEM, Vol. 33, No. 3, pp. 157-169, 2003.

Tatjana Kapus, “Rapid verification of a traffic light controller using ObjectGEODE,” Computational methods in circuits and systems application (Electrical and computer engineering series), WSEAS Press, pp. 34-41, 2003.

David Dedič, Robert Meolic, “Verification of Bakery algorithm variants for two processes,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 35-39.

Bogdan Dugonik, Matjaž Debevc, Zmago Brezočnik, “Implementation and use of video technologies for deaf community,” Proceedings of ED-MEDIA 2003, World conference on educational multimedia, hypermedia and telecommunications, Honolulu, Hawaii, USA, Jun. 2003, pp. 3079-3082.

Rudi Krebs, Boštjan Vlaovič, Zmago Brezočnik, “Prehod na konvergenčna omrežja z uporabo tuneliranja DSS1 v H.323,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 131-134.

Robert Meolic, Tatjana Kapus, Zmago Brezočnik, “An action computation tree logic with unless operator,” Agile formal methods: practical, rigorous methods for a changing world, 1st South-East European workshop on formal methods (SEEFM'03), Thessaloniki, Greece, Nov.2003, pp. 100-114. EL - 20 Microcomputer Systems Laboratory

Robert Meolic, Tatjana Kapus, Zmago Brezočnik, “Ogrodje paketa za avtomatsko reševanje logičnih ugank,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 455-458.

Anton Zorko, Boštjan Vlaovič, Zmago Brezočnik, “Digitalni prenos merilnih vrednosti v industrijskih sistemih,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 311-314.

PRESENTATIONS BY THE LABORATORY MEMBERS

Bogdan Dugonik: “Video production - make it easy to web,” lecture at a BITEMA project workshop, Ljubljana, Slovenia, Jan. 23, 2003.

Bogdan Dugonik: “Preparation of videodata for Web publishing using HELIX tools with examples,” first official presentation of HELIX tools and Real Networks company, Ljubljana, Slovenia, June 16, 2003.

Bogdan Dugonik: “Possibilities of using HELIX tools in mobile networks,” presentation of possibilities of using videoserver systems in a mobile environment, Ljubljana, Slovenia, June 26, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Boštjan Vlaovič, Co-ordinated organisation and implementation, Aleksander Vreže: arrangement, Teleinfos'03 - UM FERI Exhibition Area, Ljubljana, Slovenia, Apr. 9–12, 2003.

Prof. Dr. Zmago Brezočnik: Co-organiser, arrangement, Teleinfos'03 - UM FERI Exhibition Area, Ljubljana, Slovenia, Apr. 9– 12, 2003.

Prof. Dr. Zmago Brezočnik: Programme committee member, arrangement, Teleinfos'03, Ljubljana, Slovenia, Apr. 9–12, 2003.

Boštjan Vlaovič: Co-ordinated organisation and implementation, creative workshop for students, Teleinfos - Creative workshop for students: Telecommunications and leisure activities, Ljubljana, Slovenia, Apr. 11, 2003.

Boštjan Vlaovič: Organising committee chairman, workshop, 14th Microcomputer Systems Laboratory EL - 21

workshop on telecommunications VITEL: Security in telecommunication systems, Brdo pri Kranju, Slovenia, May 19–20, 2003.

Prof. Dr. Zmago Brezočnik: Organising committee member, workshop, 14th workshop on telecommunications VITEL: Security in telecommunication systems, Brdo pri Kranju, Slovenia, May 19–20, 2003.

Boštjan Vlaovič: Programme committee chairman, workshop, 14th workshop on telecommunications VITEL: Security in telecommunication systems, Brdo pri Kranju, Slovenia, May 19–20, 2003.

Prof. Dr. Zmago Brezočnik: Programme committee member, workshop, 14th workshop on telecommunications VITEL: Security in telecommunication systems, Brdo pri Kranju, Slovenia, May 19–20, 2003.

Prof. Dr. Zmago Brezočnik: Member of international programme board, international conference, ConTEL 2003, Zagreb, Croatia, June 11–13, 2003.

Boštjan Vlaovič, Programme committee member, workshop, 15th Prof. Dr. Zmago Brezočnik: workshop on telecommunications VITEL: Mobile Internet, Brdo pri Kranju, Slovenia, Nov. 17–18, 2003.

Assoc. Prof. Dr. Tatjana Kapus: Member of international programme board, international workshop, 1st South-East European Workshop on Formal Methods 2003: Agile Formal Methods: Practical, Rigorous Methods for a Changing World, Thessaloniki, Greece, Nov. 20, 2003.

VISITS TO OTHER INSTITUTIONS

Bogdan Dugonik, MSc: BITEMA partner meeting - what to do next at Institute of Deaf and Hard of Hearing, project meeting participation, Ljubljana, Slovenia, Jan. 21, 2003. EL - 22 Microcomputer Systems Laboratory

Bogdan Dugonik, MSc: Kick-off meeting of Leonardo da Vinci SUPPORT project partners at University of Leoben, project meeting participation, Leoben, Austria, Feb. 4–5, 2003.

Prof. Dr. Zmago Brezočnik: Working meeting with leaders of the School of Higher Professional Education for Electrical Engineering, formal call, Varaždin, Croatia, Mar. 7, 2003.

Bogdan Dugonik, MSc: Second Leonardo da Vinci SUPPORT project partner meeting at Creax, project meeting participation, Yper, Belgium, June 3–4, 2003.

Prof. Dr. Zmago Brezočnik: Member of the commission for the defence of doctoral dissertation of Gordan Ježić at the Department of Telecommunications FER, formal call, Zagreb, Croatia, July 4, 2003.

Robert Meolic, MSc, Acquaintance with the institute activities and visit of Boštjan Vlaovič, the FME’03 symposium, Istituto di Scienza e Aleksander Vreže: Tecnologie dell’Informazione, Pisa, Italy, Sep. 8– 11, 2003.

Boštjan Vlaovič: Postgraduate studies consultation meeting at the Department of Telecommunications FER, postgraduate research work, Zagreb, Croatia, Sep. 22, 2003.

Bogdan Dugonik, MSc: Third meeting of Leonardo da Vinci SUPPORT project partners at Joanneum Research, project meeting participation, Graz, Austria, Oct. 10–11, 2003.

Bogdan Dugonik, MSc: Sustainability - presentation of video scenario at Joanneum Research, formal call, Graz, Austria, Dec. 12, 2003. Microcomputer Systems Laboratory EL - 23

GUESTS AND VISITORS

Oliver Jukić Graduate studies consultation meeting, (Faculty of Electrical Engineering and postgraduate research work, June 5, 2003. Computing, University of Zagreb, Zagreb, Croatia):

DECORATIONS, AWARDS, AND HONOURS

Prof. Dr. Zmago Brezočnik: the gold plaquette of the University of Maribor, Maribor, Slovenia, Oct. 15, 2003.

EL - 24 Digital Signal Processing Laboratory

DIGITAL SIGNAL PROCESSING LABORATORY

Head: Prof. Dr. Zdravko Kačič Phone: +386 2 220 72 20 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

PREGO Razvoj in vrednotenje jezikovnih virov in komponent za strojno simultano prevajanje slovenskega govora (Development and evaluation of language resources for speech-to-speech translation of Slovenian Language) Leader: Prof. Dr. Zdravko Kačič Project partners: Pedagoška fakulteta, Maribor Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Ministry of the Information Society

The goal of the project is to develop and evaluate the language resources for speech-to- speech translation for Slovenian language. The developed resources will be compliant with the international recommendations and standards, and verified by the international validation centre SPEX. After completion they will be available to the potential users through the European language resources association (ELRA) in Paris. In the year 2003 a text corpus of 30 millions words and word lists were created, where the defined set of word lists assures 95% coverage of the selected text corpus.

ISSJ Integrated system for Slovenian language with the emphasis on development of speech databases Vodja: Prof. Dr. Zdravko Kačič, Dr. Tomaž Šef (Jožef Stefan Institute) Projektni partnerji: Jožef Stefan Institute, Amebis Digital Signal Processing Laboratory EL - 25

Financira: Ministry of Education, Science and Sport of the Republic of Slovenia, Ministry of the Information Society

The goal of the project is to build up a speech synthesis and recognition system for Slovenian language. The system will contain the core that will enable selection of different modules of speech synthesis and recognition components. In system configuration for particular application the working system can use different modules for speech synthesis and speech recognition that will be selected out of the pre-defined set of modules for both components. In the framework of the project at least one complete set of modules for speech synthesis and speech recognition will be developed together with the necessary language resources.

International projects

LC-STAR Lexica and Corpora for Speech to Speech Translation Components Leader: Prof. Dr. Zdravko Kačič Project partners: NSC, RWTH, IBM, NOKIA, UPC Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Ministry of the Information Society

The LC-STAR project is a project focusing on creating language resources (LR) for transferring Speech-to-Speech Translation (SST) components and thus improving human-to- human and human-machine communication in multilingual environments. The goal of the project is to create lexica for 13 languages and text corpora for 3 languages and to create a demonstrator translating within 3 languages. The work is performed by two parallel running tracks of which Track I will concentrate on the specification and creation of large word lists and lexica while Track II will concentrate among other things, on the investigation, specification and creation of the LR needed in speech-centred translation technologies and also building a demonstrator for speech to speech translation.

COST Action 278 Spoken Language Interaction in Telecommunication Leader: Prof. Dr. Zdravko Kačič Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, European Union

The main objective of this project is to create knowledge in several problem areas of spoken language interaction in telecommunications, in order to achieve communicative interfaces that provide a natural human-computer interaction through more cognitive, intuitive and EL - 26 Digital Signal Processing Laboratory

robust interfaces, whether monolingual, multilingual or multimodal. The work encompasses research on speech and dialogue processing in multimodal communication interfaces, issues related to robustness and multilinguality, human-computer dialogue theories, and models and systems, as well as associated tools for the establishment of interactive systems. It also involves the evaluation of telecommunication applications in which spoken language is the only or one of many types of input or output modalities. In the year of 2003 the research team worked on the project groups Broadcast News and multilingual speech recognition.

VVIGTO Evaluation of multilingual speech resources and tools Leader: Prof. Dr. Bogomir Horvat Participants: Prof. Dr. Zdravko Kačič, Dr. Mirjam Sepesy Maučec, Asst. Prof. Dr. Matej Rojc, Asst. Prof. Dr. Janez Stergar, Dr. Vladimir Hozjan, Dr. Andrej Žgank, Tomaž Rotovnik, Bojan Kotnik Financed by: Ministry of Science and Technology of the Republic of Slovenia, Ministry of External Affairs of Spain

The goal of this project is to gain new knowledge and experiences in the field of multilingually spoken language resources and automatic speech recognition. The focus of the proposed cooperation is the analysis and evaluation of language resources and methods for acoustic– phonetic modelling. This research also includes methods of language modelling based on independent language approach, i.e. statistical language modelling. The experimental work is based on the use of SpeechDat databases for the Spanish and Slovenian languages. An exchange of researchers from both institutions occured over a period of two months.

PUBLICATIONS

Vladimir Hozjan, Zdravko Kačič, “Context-independent multilingual emotion recognition from speech signals,” Int. j. speech technol., Vol. 6, No. 3, pp. 311-320, 2003.

Bojan Imperl, Zdravko Kačič, Bogomir Horvat, Andrej Žgank, “Clustering of triphones using phoneme similarity estimation for the definition of a multilingual set of triphones,” Speech commun., Vol. 39, No. 3/4, pp. 353-366, 2003.

Bojan Kotnik, Damjan Vlaj, Bogomir Horvat, “Efficient noise robust feature extraction algorithms for distributed speech recognition (DSR) systems,” Int. j. speech technol., Vol. 6, No. 3, pp. 205-219, 2003.

Iztok Kramberger, Zdravko Kačič, “Izvedba parametričnega nelinearnega filtra za iskanje kožnih značnic v digitalni sliki z FPSLIC tehnologijo,” Inf. MIDEM, Vol. 33, No. 1(105), pp. 14- 23, 2003. Digital Signal Processing Laboratory EL - 27

Matej Rojc, Zdravko Kačič, “Efficient development of lexical language resources and their representation,” Int. j. speech technol., Vol. 6, No. 3, pp. 259-275, 2003.

Mirjam Sepesy Maučec, Zdravko Kačič, Bogomir Horvat, “Modelling highly inflected languages,” Inf. sci., 2003.

Janez Stergar, Vladimir Hozjan, Bogomir Horvat, “Labeling of symbolic prosody breaks for the Slovenian language,” Int. j. speech technol., Vol. 6, No. 3, pp. 289-299, 2003.

Janez Stergar, Tomaž Rotovnik, Zdravko Kačič, “Information retrieval through speech in an multimedia authoring tool,” Informatologia (Zagreb), Vol. 36, No. 2, pp. 83-89, 2003.

Andrej Žgank, Matej Rojc, “"Lentinfo" information - providing system for the Festival Lent programme,” Int. j. speech technol., Vol. 6, No. 3, pp. 233-244, July 2003.

Bojan Kotnik, Damjan Vlaj, “Izboljšanje robustnosti sistemov avtomatskega razpoznavanja govora v šumnih okoljih,” Raziskovalno delo podiplomskih študentov v Sloveniji - ena znanost: e-zbornik, Ljubljana, Slovenia, Društvo mladih raziskovalcev Slovenije, pp. 152-160, 2003.

Darinka Verdonik, Matej Rojc, Zdravko Kačič, “Analiza jezikovnih vprašanj, nastalih pri gradnji SImflexa - oblikoslovnega in glasoslovnega slovarja za slovenski knjižni jezik,” Raziskovalno delo podiplomskih študentov v Sloveniji -ena znanost: e-zbornik, Ljubljana, Slovenia, Društvo mladih raziskovalcev Slovenije, pp. 434-443, 2003.

Janez Stergar, Bogomir Horvat, Zdravko Kačič, “Data driven symbolic prosody modeling,” Proceedings of the 15th International Congress of Phonetic Sciences [also] 15th IcPhS, Barcelona, Spain, Aug. 2003, pp. 51-54.

Vladimir Hozjan, “Comparison of pitch estimation algorithm robustness,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 185-193.

Vladimir Hozjan, Zdravko Kačič, “Improved emotion recognition with large set of statistical features,” Eurospeech'03: proceedings of the 8th European conference on speech communication and technology, Geneva, Switzerland, Sep. 2003, pp. 133-136.

Bojan Kotnik, “The usage of higher order cumulant properties of noisy speech in feature extraction procedure,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 123-130.

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Noise robust speech parameterization based on joint wavelet packet decomposition and autoregressive modeling,” Eurospeech'03: EL - 28 Digital Signal Processing Laboratory

proceedings of the 8th European conference on speech communication and technology, Geneva, Switzerland, Sep. 2003, pp. 1793-1796.

Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “The usage of wavelet packet transformation in automatic noisy speech recognition systems,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 131-134.

Tomaž Rotovnik, Mirjam Sepesy Maučec, Bogomir Horvat, Zdravko Kačič, “Slovenian large vocabulary speech recognition with data-driven models of inflectional morphology,” Proceedings of 2003 IEEE Workshop on Automatic speech recognition and understanding [also] ASRU 2003, St. Thomas, U.S. Virgin Islands, Dec. 2003, pp. 83-88.

Mirjam Sepesy Maučec, Tomaž Rotovnik, Zdravko Kačič, Bogomir Horvat, “Large vocabulary speech recognition of Slovenian language using morphological models,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 158-161.

Janez Stergar, Vladimir Hozjan, Bogomir Horvat, “First approaches in word prominence prediction,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 195-202.

Jari Turunen, Damjan Vlaj, Pekka Loula, Bogomir Horvat, “Speech coding parameters and their influence on speech recognition,” WSEAS conference proceedings, 2003.

Darinka Verdonik, Zdravko Kačič, “Slovenian as inflectional language in speech-to-speech translation,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 203-210.

Damjan Vlaj, “A comparison of frame dropping and frame attenuation algorithms that use VAD decision,” Ninth international workshop Advances in speech technology, Maribor, Slovenia, Jul. 2002, pp. 137-145.

Damjan Vlaj, Bojan Kotnik, Zdravko Kačič, Bogomir Horvat, “Usage of frame dropping and frame attenuation algorithmsin automatic speech recognition systems,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 149-152.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Comparison of acoustic adaptation methods in multilingual speech recognition environment,” Text, speech and dialogue: 6th International Conference, TSD 2003, České Budějovice, Czech Republic, Sep. 2003, pp. 245-250.

Andrej Žgank, Zdravko Kačič, Bogomir Horvat, “Data driven generation of broad classes for decision tree construction in acoustic modeling,” Eurospeech'03: proceedings of the 8th Digital Signal Processing Laboratory EL - 29

European conference on speech communication and technology, Geneva, Switzerland, Sep. 2003, pp. 2505-2508.

PRESENTATIONS BY THE LABORATORY MEMBERS

Vladimir Hozjan: “Speech technologies - TELEINFOS 2003,” introduction to Speech technologies on Teleinfos 2003, Ljubljana, Slovenia, Apr. 9, 2003.

Zdravko Kačič: “Speech Synthesis and Expressive Speech,” invited lecture in topic speech synthesis and expressive speech, Barcelona, Spain, Dec. 11, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Zdravko Kačič: AST 2003, international workshop, organisation and implementation, Maribor, Slovenia, June 3–5, 2003.

Prof. Dr. Zdravko Kačič: Reviewer for International Journal of Speech Technology, associate editor, hosting editor.

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Zdravko Kačič, Management committee meeting of COST 278 Dr. Andrej Žgank: project, project meeting participation, Barcelona, Spain, Feb. 9–11, 2003.

Bojan Kotnik: Bilateral cooperation between Slovenia and Spain, research work, Barcelona, Spain, Apr. 1–30, 2003.

Prof. Dr. Zdravko Kačič, Visit to Technical University of Graz, Graz, Austria, Dr. Mirjam Sepesy Maučec: Apr. 22, 2003.

Prof. Dr. Zdravko Kačič: Management committee meeting of COST 278 project, project meeting participation, Stockholm, Sweden, May 4–6, 2003.

Prof. Dr. Zdravko Kačič: Meeting participation inside the LC-STAR project, project meeting participation, Mannheim, Germany, May 12–13, 2003. EL - 30 Digital Signal Processing Laboratory

Darinka Verdonik, MSc: Meeting participation inside the LC-STAR project, project meeting participation, Istanbul, Turkey, July 31 to Aug. 1, 2003.

Prof. Dr. Zdravko Kačič, Management committee meeting of COST 278 Dr. Andrej Žgank: project, project meeting participation, Geneva, Switzerland, Sept. 5, 2003.

Bojan Kotnik: Visit of the international conference EUROCON2003, meeting participation, Ljubljana, Slovenia, Sept. 22–24, 2003.

Prof. Dr. Zdravko Kačič: Visit to Technical University of Catalonia, Catalonia, Spain, Dec. 11, 2003.

GUESTS AND VISITORS

Frank Diehl Development of multilingual speech recognition (Universitat Politecnica de Catalunya, based on acoustic modeling techniques, research Barcelona, Spain): work, June 6 to July 6, 2003.

Institute of Power Engineering PE – 1

INSTITUTE OF POWER ENGINEERING

Head: Prof. Dr. Ivan Zagradišnik Phone: +386 2 220 70 40 E-mail: [email protected] URL: http://www.me.feri.uni-mb.si/

The research work of the Institute of Power Engineering is divided into three main areas: electromagnetic devices; production, transmission and distribution of electrical energy; and power system control. The research on electromagnetic devices is focused on numerical methods. The research on electrical energy deals mainly with optimisation processes, reliability, and the quality of electrical energy. Modernising control of power systems is the subject of the third topic.

The institute of Power Engineering co-operates with many universities and institutes abroad: University Zagreb, Faculty of Electrical Engineering and Computer Science - Croatia; University J. J. Strossmayer Osijek, Faculty of Electrical Engineering - Croatia; University Kragujevac - Serbia and Montenegro, University Sts. Cyril&Methodious Skopje, Faculty of Electrical Engineering - Macedonia; University Tuzla, Faculty of Electrical Engineering - Bosnia and Hercegovina, Technische Universität Graz, Elektrotechnische fakultet - Austria; Universität Johannes Kepler Linz, Institut für elektrische Maschinen und Regelungstechnik - Austria; Technical University of Budapest, Institute for electric machines - Hungary; Universität Paderboren - Germany; University D'Artois - France; Katolieke Universiteit Leuven, Institute for electric machines and drives - Belgium; Technische Universität Achen - Germany; Northeastern University Boston - USA; Association of EU Universities Dortmund - Germany; Physikalisch-Technische Bundesanstalt Braunschweig - Germany; Institute of Electrical Engineering Warsava - Polska; University Lodz, PE – 2 Institute of Power Engineering

Institute of Mechatronics and Information Systems - Polska; Instituto Nacionale Galileo Ferraris Torino - Italia; Doshisha University Kyoto - Japon.

Institute of Power Engineering Head: Prof. Dr. Ivan Zagradišnik

Electrical Power Machines Engineering Laboratory Laboratory Head: Head: Prof. Dr. Ivan Zagradišnik Assoc. Prof. Dr. Jože Voršič

Electromechanical Fundamentals and Theory Systems Control of Electrotechnics Laboratory Laboratory Head: Head: Prof. Dr. Bojan Grčar Prof. Dr. Igor Tičar

Applied Electromagnetics Laboratoy Head: Assoc. Prof. Dr. Mladen Trlep

Institute of Power Engineering PE – 3

Electrical Machines Laboratory

Head: Prof. Dr. Ivan Zagradišnik Employees: Bojan Slemnik, MSc; Florijan Leskovar, Ing.; Miralem Hadžiselimović, BSc

Power Engineering Laboratory

Head: Assoc. Prof. Dr. Jože Voršič Employees: Assoc. Prof. Dr. Gorazd Štumberger; Assoc. Prof. Dr. Jože Pihler; Andrej Hanžič MSc; Janez Ribič, BSc; Marjan Stegne, BSc; Jurček Voh; Andrej Korak, BSc

Electromechanical System Control Laboratory

Head: Prof. Dr. Bojan Grčar Employees: Prof. Dr. Drago Dolinar; Asst. Prof. Dr. Jožef Ritonja; Dr. Oto Težak; Dr. Boštjan Polajžer; Aleksander Krašovec, BSc; Zlatko Strelec

Fundamentals and Theory of Electrotechnics Laboratory

Head: Prof. Dr. Igor Tičar Employees: Andrej Orgulan, MSc; Peter Kitak, BSc; Andrej Stermecki, BSc

Applied Electromagnetics Laboratory

Head: Assoc. Prof. Dr. Mladen Trlep Employees: Assoc. Prof. Dr. Anton Hamler; Dr. Marko Jesenik; Dr. Bojan Štumberger; Viktor Goričan, BSc; Gorazd Hrovat, BSc; Anton Habjanič, BSc PE - 4 Electrical Machines Laboratory

ELECTRICAL MACHINES LABORATORY

Head: Prof. Dr. Ivan Zagradišnik Phone: +386 2 220 70 40 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

L2-5140-0796-03 Elektronsko komutirani elektromotorji za posebne namene (Brushless DC motors for special purposes) Leader: Asst. Prof. Dr. Bojan Štumberger Participants: Prof. Dr. Ivan Zagradišnik; Bojan Slemnik, MSc; Matej Gajzer; Miralem Hadžiselimovič; Assoc. Prof. Dr. Riko Šafarič; Mirko Petrovčič Project partners: Rotomatika, d. o. o. Financed by: Rotomatika, d. o. o., Ministry of Education, Science and Sport of the Republic of Slovenia

The subjects of this research are permanent magnet synchronous motors with outer (exterior) or classical internal rotors. The goal of the research is the design and development of a synchronous permanent magnet motor with outer rotor for fan drive applications. A permanent magnet synchronous motor should be interchangeable with the existing induction motor regarding its construction, but have greater efficiency and produce lower noise level. Special attention has been devoted to the efficient design selection of rotor construction for achieving the desired motor characteristic at unaltered stator construction. An isotropic ferrite material has been selected for permanent magnet motor material. Geometry optimization of the permanent magnet segments and optimization of the stator winding has been accomplished in order to achieve the desired motor characteristics, minimization of total Electrical Machines Laboratory PE - 5

torque ripple and efficiency improvement. The gluing of pre-magnetized permanent magnet segments in rotor construction is fraught with several difficulties. Therefore, an impulse-magnetizing fixture has been designed and manufactured, which enables multi-pole post-assembly magnetization of the permanent magnet segments after final assembling of the magnet segments into the rotor construction. Measurements of motor prototype characteristics give expected results.

Research and development projects

4010-312 Tlačno liti rotor kot nadomestitev rotorja z bakreno kratkostično kletko (Aluminium die-casted rotor replacing copper squirrel cage rotor) Leader: Franc Kosel (Faculty of Mechanical Engineering, University of Ljubljana) Participants: Prof. Dr. Ivan Zagradišnik; Bojan Slemnik, MSc; Miralem Hadžiselimovič; Mirko Petrovčič Project partners: Rotomatika, d. o. o. Financed by: Rotomatika, d. o. o., Ministry of Economics of the Republic of Slovenia

Within the sphere of our activities on the previous-competition project, we continued with our research from last year. The Mechanical Faculty of Ljubljana led the research project. The project deals with the possibility of replacing the copper squirrel cage with an aluminium (or their alloy) for pump driven electrical motors and with this connection cheaper production and increased competition in the area of rotor production. The present copper rotor is additional protected with a stainless cover to protect the copper and stack against the aggressiveness of the medium and is uncompetitive for this reason. Market position will be better with the introduction of new cutting tools for lamination (without packing) and die-cast rotors. The Laboratory for Electrical Machines cooperated firstly in defining the optimal dimension of the rotor lamination, the number and the shapes of the slots (bars) of the squirrel cage rotor. Calculation of the optimal dimensions was done with a CAD named MPROAW, and further one named Ansys for the numerical magnetic field calculation by FEM. At the conclusion of the project the laboratory took part in the measurements and final comparison analysis of the existing type of products (copper rotor) and new motor samples. PE - 6 Electrical Machines Laboratory

4010-643 Asinhronski pogonski sistemi (Induction drive systems) Leader: Robert Žerjal (Iskra Avtoelektrika, d. d.) Participants: Prof. Dr. Ivan Zagradišnik, Miralem Hadžiselimovič, Matej Gajzer, Iztok Špacapan Project partners: Iskra Avtoelektrika, d. d. Financed by: Ministry of Economics of the Republic of Slovenia, Iskra Avtoelektrika, d. d.

In the year 2002 we started with the previous-competition project Induction drive system (induction motors with electronic control) electric vehicle from 2 to 4,3 kW power. Electronic control is fed by a DC battery 36 to 80 V. The particularities of these three-phase induction motors are a very low supply voltage and solving the connected problems by producing motor windings i.e. the high number of parallel brunches. In the first year we conducted analyses of the lamination suppliers with the combinations of winding and studied the possibility of using inserting machines. We conducted numerical 2D analyses of the magnetic field with emphasis on the high order-harmonic components to achieve better efficiency and lower additional losses. The lamination stack needs to be shortened for the build-in drive motors of electrical vehicles because of limited dimension and mounted electric brake. A triangle winding connection was used because of very low battery supply voltage and that was bad for the drive system stability supplied by ZAPI controller. The special problems are shaft currents caused by the voltage of the loop which is composed of the shaft, bearings shield and housing. They are the results of PWM modulation switching frequencies about 1 kHz and they lead to earth currents and, finally, to circumference flux. Amplitudes values 10 to 20 times greater than the supply voltage occur due to this flux-induced voltage in the shaft. These currents can over time damage the bearings depending of the currents strength, respectively the shaft voltages (the danger voltages are about 500 mV). The last part of the proposed research was oriented in the comparison measurements of the shaft currents and to taking steps for their reduction.

Industrial projects

SRMASM Experimentalna analiza SRM in ASM (Experimental analysis of SRM and IM) Leader: Prof. Dr. Drago Dolinar Participants: Assoc. Prof. Dr. Gorazd Štumberger, Prof. Dr. Ivan Zagradišnik Project partners: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o. Electrical Machines Laboratory PE - 7

Financed by: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

A complete experimental comparative analysis has been done between the equivalent synchronous reluctance cylindrical and induction machines. The steady state characteristics of both machines are more or less the same, while the warming of the rotor is much smaller in the case of the reluctance machine.

Completed research projects 2003

Applied project

L2-3440 Posebni elektromotorji za sodobne servopogone (Special electrical motors for modern servo drives) Leader: Assoc. Prof. Dr. Riko Šafarič Participants: Bojan Slemnik, MSc; Matej Gajzer; Miralem Hadžiselimovič Project partners: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o. Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

Duration: Jan. 2000 to June 2003

The subject of the research in the scope of this project were special synchronous motors with permanent magnets, supplied by frequency converters, which are intended for use in modern servo drives. On the basis of performed analytical work and numerical simulations we proposed to the co- financer of this project, the company Indramat elektromotorji from Železniki (Slovenia), member of the Bosch Rexroth AG (Germany), a proper combination of permanent magnet rotors and suitable stator windings. The mentioned company can rely on an achievement of the desired static characteristics, as well as a smaller influence of certain higher harmonics on torque ripple – indirectly with diminished heating, which is, in general, one of the biggest problems for the producers of electrical machines. At the end of our research we modernized the numerical model of the motor, which made the transient analysis regarding the rotor position and stator excitation respectively possible. Based on the results of this analysis we concluded that the method of the predicted design was correct. The results of this analysis fulfilled the expectations regarding the demands about torque ripple control. These results were also in accordance with the measurement results of the prototype’s static characteristics, made by the Indramat elektromotorji company PE - 8 Electrical Machines Laboratory

and measured by the Bosch Rexroth AG company.

Measurement setup for special electric motors.

PUBLICATIONS

Damijan Miljavec, Miralem Hadžiselimović, Konrad Lenasi, Ivan Zagradišnik, “Izgube moči sinhronskega reluktančnega motorja,” Electrotechnical Review, Vol. 70, No. 5, pp. 267-272, 2003.

Igor Tičar, Andrej Stermecki, Ivan Zagradišnik, “Numerical analysis of the brushless motor magnetic field and torque,” XI. International symposium on electromagnetic fields in electrical engineering, ISEF 2003, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 847-852.

Miralem Hadžiselimović, Tine Marčič, Matej Gajzer, IvanZagradišnik, “Posebnosti električnih meritev eksplozijsko varnih motorjev,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 161-164.

Miralem Hadžiselimović, Damijan Miljavec, Ivan Zagradišnik, Konrad Lenasi, “Vpliv zračne reže na karakteristike sinhronskega reluktančnega motorja,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 229-232.

Power Engineering Laboratory PE - 9

POWER ENGINEERING LABORATORY

Head: Assoc. Prof. Dr. Jože Voršič Phone: +386 2 220 70 50 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

L2-5407 Programski paket: "Zaščita pred učinki strele" (Software "Lightning protection") Leader: Assoc. Prof. Dr. Jože Voršič Participants: Darko Koritnik, MSc; Assoc. Prof. Dr. Jože Pihler Project partners: Hermi, d. o. o. Financed by: Hermi, d. o. o., Ministry of Education, Science and Sport of the Republic of Slovenia

Software for controling the quality of a lightning conductor was developed based on the Cigre 33 mathematical and physical model. The bases for the software are the valid regulations for lightning protection from the year 1968 and on contemporary standards, which take into the consideration present state of the technology.

L2-4435-0796-02 Nov sistem srednjenapetostnih daljnovodov (New system of mediumvoltage powerlines) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Assoc. Prof. Dr. Jože Voršič; Andrej Hanžič, MSc; Darko Koritnik, MSc; Marjan Stegne; Prof. Dr. Igor Tičar Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, TEHMAR proizvodnja, inženiring in trgovina, d. o. o. PE - 10 Power Engineering Laboratory

The goal of the project is to develop a new system of plain and covered conductors in medium-voltage overhead networks. Special attention should be paid to environmental impacts. In 2003 we analysed conditions regarding the use of covered conductors (conductors that are not insulated for their rated voltage) in Slovenia and worldwide. We found that they are extensively used in America, Australia, England and Northern Europe. In Slovenia they have been used for ten years. Some problems appear, mostly due to the incompatibility of covered conductor and accessories (insulators, suspension clamps). On the basis of electromagnetic field computation, a comparison was done between the existing method of conductor fixing and the new method with new composite insulators. After the computations the prototype of a new insulator was created together with the FCI Institute from Hungary. This prototype was tested in the ICEM FERI Laboratory. The computations and practical tests show that this new system of covered conductors is much better than the old one. Higher mutual adaptation of the dielectric constants of insulator's and the covered conductors' materials cause even more electric field distribution. Computation of electric field strength also shows that its values already one metre below the lowest conductor, do not exceed values to which human beings can be exposed.

Industrial projects

APL Akreditacija preskusnega laboratorija (Accreditation of testing laboratory) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Marjan Stegne; Darko Koritnik, MSc; Lidija Korpar Koritnik Project partners: ICEM-TC Financed by: ICEM-TC, Ministry of Economics of the Republic of Slovenia

Our intention is to qualify the ICEM Electric Power Laboratory to have a recognised qualification for work in accordance with standards. The main goal is to obtain accreditation of the laboratory.

APMP3 Avtomatizacija preskusov na merilni progi MP3 (MP3 measuring line testing automatisation) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Darko Koritnik, MSc; Marjan Stegne; Franc Pikl; Janez Primožič Project partners: EHO, d. o. o., ETI Elektroelement, d. d., ICEM-TC Financed by: Ministry of Economics of the Republic of Slovenia, ICEM-TC

The subject of the project is implementation of automation of the entire measuring line for Power Engineering Laboratory PE - 11

power measurements MP3. The final objective is preparation of the complete project documentation and actual automation of the MP3 measuring line. It will be possible to control the measuring line from two sides, either from a computer or from a modern control panel.

International projects

Slo-A19/2002 Virtual Electromagnetic Laboratory and Web-based Distance Learning Leader: Prof. Dr. Igor Tičar Participants: Assoc. Prof. Dr. Jože Pihler; Assoc. Prof. Dr. Anton Hamler; Andrej Orgulan, MSc; Mitja Žnidarič; Prof. Dr. Kurt Preis; Prof. Dr. Oscar Biro; Peter Kitak; Andrej Stermecki Project partners: Institut für Grundlagen und Theorie der Elektrotechnik Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

This project will intensify the successful co-operation between the Laboratory of Applicative Electrical Engineering of FERI and the Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) of TU Graz. Both institutions have successfully co-operated for many years in the field of numerically solving electromagnetic field problems, which is evident from several commonly published papers. This co-operation has been especially intensive and successful over the last couple of years in the field of computer supported educational programmes for the subjects Principles of Electrical Engineering and Theoretical Electrical Engineering. The solving of applicative problems for industry using previously developed programme tools has also been very successful. Further upgrading of existing, and the design of new programme tools will include the development of new pre-processors for planar and rotationally symmetrical electromagnetic problems, pre-processors for planar problems in polar co- ordinates for electric machines, two and three dimensional programme packages EleFAnT2D and EleFAnT3D. In addition to this, some examples of a virtual electromagnetic laboratory will be developed to improve practical exercises for the subject ‘Principles of Electrical Engineering’. Procedures will also be developed for the computer animation of electromagnetic phenomena. The institutes at TU Budapest and TU Stuttgart are also included in this co-operation. The Austrian partner also co-operates with the University of Bath (UK) and University of Genoa (I) in the EU project Teleteaching and distance education and in INCO COPERNICUS project P.nr. 15CT960703. PE - 12 Power Engineering Laboratory

EUROPEAID/112846 The Republic of Slovenia – Technical Assistance for the /D/SV/SI Implementation of GSM –R, ERTMS/ETCS System and Remote Control of Fixed Installations for Electric Traction System on Railway Network Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič, MSc; Darko Koritnik, MSc; Assoc. Prof. Dr. Jože Pihler; Marjan Stegne; Bojan Cene Project partners: OMEGA Consult Financed by: European Commission

There is a judgment on the influences of the project EUROPEAID/112846/D/SV/SI on the environment given in the report. This judgment is given separately for each particular specification (LOT). The judgment contents include estimation of of the current condition’s influences as well as an estimation of the influences of the condition after modernization. This judgment is based on the European standard EN 50160: Voltage characteristics of electricity supplied by public distribution systems and EN 61000-2-4: Electromagnetic compatibility (EMC), Part 2: Environment, Section 4: Compatibility levels in industrial plants for low- frequency conducted disturbances for conducted disturbances. They are also based on Slovenian legislation for non-ionizing radiation because the legislation defines stricter measures than suitable for European regulations. The basic act is represented by The Government Decree on Electromagnetic Radiation in natural and habitual environments from 1996, published in Ur.l. of RS no.70/96.

CRP-KS 985-05/01 Research supporting the implementation of Kyoto Protocol – (V1-0480-01) Target oriented research programme “Competitiveness of Slovenia 2001-2006” Leader: Mihael Gabriel Tomšič (Institut "Jozef Stefan") Participants: Assoc. Prof. Dr. Jože Voršič; Andrej Hanžič, MSc; Assoc. Prof. Dr. Jože Pihler; Miran Horvat; Jurček Voh; Janez Ribič Project partners: Radenska d.d. Financed by: Ministry of Environment and Physical Planning of the Republic of Slovenia, Ministry of Education, Science and Sport of the Republic of Slovenia

The Slovenian Government adopted in November 2000 the Strategy and Short-Term Action Plan for Greenhouse Gas-Emission Reduction. This Strategy defines targets, basic principles of emission reduction and a set of possible measures. The next steps and milestones of policy for the prevention of climate change (in accordance with the National Programme of Environmental Protection, Official Gazette of RS, no. 8/99) will be elaboration of the National Power Engineering Laboratory PE - 13

Programme for Greenhouse Gas Emission Reduction, implementation of the measurement and monitoring of their effects, and elaboration of national reports by the year 2002. The National Programme for Greenhouse Gas Emission Reduction will quantitatively define targets for each sector and provide detailed measurements specifications. Financial evaluation of the entire programme will also be included in the National Programme. The core activity of the research work in the framework of this project is preparation of a methodological proposal for distribution of the emission reduction burden among the sectors. A tool for quantitative evaluation and analysis of potential national Kyoto strategies for Slovenia, and evaluation of individual sector strategies and instruments, will be developed on the basis of the upgrading and integration of existing computer models. An analysis of the worldwide development of new flexible Kyoto mechanisms and tools for the quantitative evaluation of the effects of their implementation will be the basis for the elaboration of methodological proposals for the implementation of these mechanisms in Slovenia. The expected project results will be an important professional support for operative preparation of the National Programme for Greenhouse Gas Emission Reduction. The project team will prepare a survey of various sector approaches and implemented mechanisms for the distribution of emission reduction burdens among sectors for selected EU countries. An analysis will also be made of the anticipated development of common EU policy in this field. This will serve as a basis for a proposal for methodology and mechanisms for the distribution of greenhouse emission burdens among the sectors in Slovenia.

SAVE-2002-083 Dissemination of energy efficient electric and electronic equipment (EEE) in European universities - The purchasing of energy efficient and environmentally friendly information and communication technologies Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič, MSc; Miran Horvat; Darko Koritnik, MSc Project partners: COPERNICUS Secretariat Financed by: European Union

This proposal starts from the assumption that the immense increase in the use of electricity is mainly caused by the application of new information and communication technologies (ICT's) such as PC's, printers etc.. Universities are well-placed to look deeper into this problem through their inherent teaching and research capacities. Furthermore, universities in Europe with more than 17 million students are important social multipliers and the graduate students are excellent change agents for realizing changing production and consumption patterns. The concept of the project bases itself on the idea of using the unique COPERNICUS network consisting of 286 universities in 36 European counties for the wide dissemination of project results. A project consortium consisting of 11 universities from EU member states should develop together - under the coordination of COPERNICUS - a model for a purchasing initiative for energy-efficient ICT's. This model should be tested by the project PE - 14 Power Engineering Laboratory

consortium in a pilot action for a virtual market place that should be opened to other universities after the end of the project. Universities are perceived in this project as important driving forces to contribute to the promotion of energy-efficiency in Europe. The overall objectives of the SAVE project proposal is to assist universities to become more energy-efficient and climate-friendly through the integration of energy efficiency objectives into their purchasing directives for electrical and electronic equipment (EEE). This project, therefore, will (1) undertake an assessment of the energy saving potential in office equipment, (2) raise awareness at all university levels for the use of energy-efficient and environmentally friendly EEE (3) create a purchasing network in public procurement for energy-efficient and environmental friendly EEE. The overall objective of the proposed project is to assist universities to become more energy- efficient and climate-friendly through the integration of energy efficient objectives into their purchasing directives for electrical and electronic equipment (EEE). The project will therefore: (1) obtain detailed information on how universities purchase their EEE in the area of ICT, (2) raise awareness at all university levels for the wide use of energy efficient office equipment in the area of ICT and to develop a purchasing network model for universities for energy efficient equipment, (3) undertake a pilot action to assist universities in combining their efforts to purchase energy efficient and environmentally friendly office equipment by developing a tailor-made marketplace for universities that can be opened up to other universities after the project and that might offer a model for other (public) procurement sectors

Completed research projects 2003

Basic research project

NPPIZPS Novi pristopi k preverjanju inštalacij za zaščito pred strelo (New approaches in checking lightning protection installations) Leader: Assoc. Prof. Dr. Jože Voršič Participants: Ruslan Borisov; Darko Koritnik, MSc; Žiga Hribar Project partners: Iskra Zaščite, Moscow Power Engineering Institute Financed by: Iskra Zaščite, Ministry of Economics of the Republic of Slovenia

Duration: Jan. 2002 to Dec. 2003

We developed and introduced new methods for testing those electrical installations for lightning protection in co-operation with Iskra Zaščite, Iskra-techno and the University of Electrical Engineering from Moscow. These methods are mainly intended for these facilities Power Engineering Laboratory PE - 15

with special requirements and problems. The radio and TV transmitter, located on the Kum mountain, was chosen to be the test facility for the simulation of lightning strokes into the tower. In these tests we analysed the distribution of lightning current along the earthing electrode, and found out the share of lightning current that penetrates into 10 kV network. The activities for standardisation of these methods and their widespread use are still going on.

Applied project

EBMOM2002 Energijska bilanca Mestne občine Maribor za leto 2002 ter izračun emisij škodljivih snovi (Energy balance of MOM for year 2002 and calculation of emmisions) Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič, MSc; M. Dornik; G. Černe Financed by: Municipality of Maribor

Duration: Jan. to Dec. 2003

Energy balance of the Civic Municipality of Maribor is the basic document on the use of each form of final energy and the quantities of primary energy that are necessary for meeting the energy requirements of the Civic Municipality. On the basis of the final energy use the energy balance for 2002 was prepared. For that year an estimation of greenhouse gas emissions from the energy sector (industry, transport, general use and energy transformation), which are subject to the Kyoto Protocol, was also made. The energy balance of the Civic Municipality of Maribor was prepared in accordance with the EUROSTAT methodology, which makes it comparable with the energy balance of the Republic of Slovenia.

LA-PVOM Lokalna agenda – Program varstva okolja za Maribor (Local agenda – Environmental Protection Programme for Maribor) Leader: Assoc. Prof. Dr. Jože Voršič Participants: D. Rebolj; M. Bas; Andrej Hanžič, MSc; Andrej Orgulan, MSc; Miran Horvat; Boris Bizjak, MSc; Darko Koritnik, MSc; Igor Recer; R. Gostinčar; G. Vizovišek Financed by: Institute of Environmental Engineering of Maribor, Municipality of Maribor, Tourist Association of Maribor

Duration: Jan. 2000 to Dec. 2003 PE - 16 Power Engineering Laboratory

This project links the activities of working groups, responsible for the co-ordination of individual areas of environmental protection. The main objectives of our activities are the definition of preferential tasks and strategic guidelines for solving environmental protection problems for local areas. The working groups have full authority to propose new or additional research and analyses when they are unable to come to conclusions. The working groups cover the following areas: water, waste, atmosphere, noise, emissions, municipal green areas, agriculture, industry, tourism, energy policy, IT, environment and health, economy and organisation. Our working group covers energy planning. In the framework of the Programme FERI organises seminars for people, responsible for decision making in this field.

ŠČIT Izdelava programskega paketa za projektiranje prenapetostne zaščite in zaščite pred strelo (Development of software package for projecting overvoltage protection and lightning protection) Leader: Andrej Pirih (Iskra Zaščite) Participants: Darko Koritnik, MSc; Žiga Hribar; Janez Podlipnik Project partners: Iskra Zaščite, Hermi, d. o. o. Financed by: Ministry of Economics of the Republic of Slovenia

Duration: Jan. 2002 to Jan. 2003

We developed a programme package for the designing of lightning and overvoltage protection systems. This programme package is based in the existing standards and regulations. It is also open to any subsequent changes of these standards and regulations. The programme package also contains, in addition to the technical part, an economic part that calculates and prints part tables. Elements in a part table are from the production programmes of the companies Iskra Zaščite, d. o. o. and Hermi, d. o. o..

L2 Izdelava primerjalne študije o kakovosti električne energije na ravni Evropske unije (Elaboration of Comparative Study on Electrical Power Quality in the European Union) Leader: Andrej Orgulan, MSc, Bojan Potočnik Participants: Assoc. Prof. Dr. Jože Voršič; Boris Bizjak, MSc; Assoc. Prof. Dr. Jože Pihler; Darko Koritnik, MSc; Marjan Logar; Andrej Hanžič, MSc; Marjan Stegne; Miran Horvat; Mitja Žnidarič Duration: Jan. 2001 to Dec. 2003

The objectives of the project were performing of the measurements and to elaborate a report on the quality of electrical power in transmission and distribution networks. For the purpose of Power Engineering Laboratory PE - 17

this project we had to analyse the conditions in the Slovenian transmission network and some previously elaborated studies dealing with similar issues. The minimum set of measurement points has been defined and selected for each of the regions in Slovenian electric power system. In the first part of the project the measurements of electrical power quality were performed at the voltage levels 110 kV, 20(10) kV and 400 V. The results were analyzed and compared with the aimed values for each voltage level and corresponding limits in European standards. This analysis was demanding task due to the large amount of measurement results, which have to be clear and should not be misleading. On a basis of measured voltage parameters we presented a proposal of the set of measurement points for the future power quality monitoring system in the Slovenian transmission and distribution systems.

Research and development project

PVNDS Študija izvedljivosti pilotne vetrne naprave z difuzorjem v SV Sloveniji (Feasibility study of pilot wind device with diffuser in NE Slovenia) Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič, MSc; Andrej Predin; Andrej Polajnar Financed by: HSE, d. o. o.

Duration: June to Dec. 2003

The basic for the project is commercialisation of an already developed product. Technical development in the field of wind turbines goes to two directions. The first direction represents so-called conventional wind turbines – with three-bladed rotors. The other direction represents diffuser augmented wind turbines, where rotor is surrounded by a coat in the form of a widened tube. The latter type of wind turbines have much better efficiency at low wind speed, compared to conventional types of wind turbines. On the basis of computations the first Slovenian prototype of a diffuser-augmented wind turbine will be made. This prototype of the wind turbine will be made on the basis of the project documentation and SWOT analysis of the product. This prototype will be used for measurements of the electrical parameters of the wind turbine in various operating regimes and for changing electrical load. The project enables the largest Slovenian electricity generator HSE to enter the area of planning large wind turbines and, eventually, to sell these technologies on the energy market in a separate consortium. PE - 18 Power Engineering Laboratory

SEEMP Študija izvedljivosti pilotne sončne elektrarne moči 1,56 KW na štajerskem z DC/AC pretvornikom, z integrirano enoto maksimalnega prenosa moči (Feasibility study of pilot solar power station with DC/AC converter and integrated unit of maximum power transmission) Leader: Assoc. Prof. Dr. Jože Voršič Participants: Andrej Hanžič, MSc; Prof. Dr. Miro Milanovič Financed by: HSE, d. o. o.

Duration: June to Dec. 2003

The storing of electricity has represented a problem since the very beginning of electrification and electricity generation. Therefore, electricity should be used immediately, without intermediate storage. In addition to this, PV systems without electricity storage cannot be sufficient for a normal supply to consumers, especially due to the low efficiency of solar cells and the daily and annual variations of solar insulation. The problem of storage and supply of electricity can be solved with a parallel connection of the system with an electric network. In this way the use of storage batteries is avoided, which represents an advantage in the price of a PV system, its life expectancy, and in reducing environmental pollution. The work will be done by following the PV cell's characteristics at various levels of insulation and adapting the load, all with the purpose of exploiting the available solar radiation to the maximum possible extent. To achieve this it would be necessary to change the load's resistance which is, of course, impossible since it is given (e.g. DA/AC converter, storage battery). The problem can be solved with an additional DC converter with a variable conduction factor. This measurement can lead to a 200% to 300% increase in efficiency at the low level of a PV cell's irradiation. The task of our project team is to develop a prototype of such a converter since DC/AC converters with integrated adaptation of voltage to load are not yet commercially available,. The basic objective is to erect a small PV power plant for the purpose of supplying electrical consumers. Since the system will be controlled, and the acquisition of measurement data will be performed, through intranet connection of the controller and analogue process unit for data acquisition, it will enable long-term monitoring of a PV system's operation for the purpose of further research work and a parallel operation of the system with a low voltage electricity network.

PMJ Prenova mestnega jedra (Urban Renovation of the Historic City Centre) Leader: Igor Recer (IGRE, d. o. o.) Participants: Assoc. Prof. Dr. Jože Voršič; Andrej Hanžič, MSc; Andrej Orgulan, MSc; Marjan Stegne; Jurček Voh Power Engineering Laboratory PE - 19

Project partners: IGRE, d. o. o., The International Institute for Advanced Studies in Systems Research and Cybernetics, Inštitut za gospodarsko pravo Maribor, SI Consult, d. o. o., Institute of Environmental Engineering of Maribor, OEGA Consult, d. o. o. Financed by: Municipality of Maribor

Duration: Jan. 2000 to Dec. 2003

Twenty years ago a ten-year Programme of Renovation for Maribor's Historic City Centre was adopted. The Programme was financed from the system source of the then Self-Management Housing Community. The implementation of this Programme was considered successful and was also presented to the Professional public in Slovenia and abroad. In recent years some new problems have emerged, which impede successful renovation of the city centre. The ownership structure has changed and it is impossible to restore the source of financing. It was necessary to set new objectives for renovation and find financial sources, which are the primary task of this project: research on possibilities of heating old downtown with heat pump with aid from foreign investor. When doing object energy cards and cataloguing burning places in old downtown and searching for ecologically more acceptable energy source then fossil fuel we got to geothermal energy – heat pumps with geo-probes (closed pipe system). Introducing heat pumps, which would exploit Earth heat only (without pumping underground water) is economically feasible without greater technological difficulties.

Industrial project

ZSDZHEMOIMP Zagotavljanje selektivnega delovanja zaščite HE MO pri izvajanju močnostnih preskusov (Ensuring selective activation of protection system of HPP Mariborski otok in the time of performing of laboratory tests) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Marjan Stegne; Darko Koritnik, MSc; Bojan Suhodolčan; Marjan Vidovič Project partners: ICEM-TC, Dravske elektrarne Maribor d.o.o. Financed by: ICEM-TC, Ministry of Economics of the Republic of Slovenia

Duration: Jan. to Dec. 2003

Tests with high currents that are performed in the ICEM power laboratory are very big loads for the network, although their duration amounts to some milliseconds. Since such loads do not appear every day in the network, it was necessary to thoroughly investigate whether they PE - 20 Power Engineering Laboratory

could cause any direct or indirect damage to the HPP Mariborski otok or to the Regional Control Centre of the Drava HPPs.

KMIPMMR Kontaktni materiali in preskušanje miniaturnih močnostnih relejev (Contact materials and testing of miniature power relays) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Assoc. Prof. Dr. Jože Voršič; Darko Koritnik, MSc; Marjan Stegne Financed by: Iskra - releji, d. d.

Duration: Mar. to Oct. 2003

Electromechanical relays for low power applications are still widely used in spite of increased penetration of semiconductor devices. This is mainly due to the following advantages: very low resistance of the contacts in the closed position, very high resistance when the contacts are open, and high amplification. The sizes of these devices have reduced considerably due to adaptation to other electronic elements and direct building into printed circuits,. Therefore it is necessary to use new materials and develop new structures in the magnetic and mechanical circuits of the relay. We analysed various contact materials that have an impact on the relay's life expectancy. For the AgCdO 10 contact material, we performed withstand tests on a small power relay TRK 10, in accordance with standards for various types of loads and values of variables. The analyses and measurements showed that various materials had a very strong impact on relays' life expectancy, and that special attention should be paid to load characteristics, which have a strong impact on the contact system's operation.

SPVNJV Sprejemljivostni preskus varovalk po normativih za jedrsko varnost (Acceptancy test for fuses according to nuclear safety normatives) Leader: Assoc. Prof. Dr. Jože Voršič Participants: Assoc. Prof. Dr. Jože Pihler; Darko Koritnik, MSc; Marjan Stegne Project partners: ICEM-TC, NEK, Jedrska elektrarna Krško, Faculty of Business and Economics Maribor Financed by: NEK, Jedrska elektrarna Krško

Duration: May 2002 to Mar. 2003

This project continued from the year 2002, when some requirements for and approaches to the assessment of technical and economic justification when performing acceptability tests in NEK (Krško Nuclear Power Plant). In the year 2003 actual tests were carried out on Power Engineering Laboratory PE - 21

CH10X36 16A melting fuses, manufactured by ETI. These melting fuses comply with European standards, but since NEK was built according to American standards, the entire equipment built into this power plant has to comply with American standards. The test showed that the fuses that fully comply with European standards do not comply completely with American standards. For fulfilling the requirements of American standards it would be necessary to develop a new melting element, which is simply uneconomical when only for the purposes of NEK.

UITMP3 Umerjanje izmeničnih tokov na močnostni progi MP3 (Calibration of AC currents on the MP3 measuring line) Leader: Darko Koritnik, MSc Participants: Assoc. Prof. Dr. Jože Pihler, Marjan Stegne, Franc Pikl, Andrej Kohn Project partners: ICEM-TC, ETI Elektroelement, d. d. Financed by: ICEM-TC, Ministry of Economics of the Republic of Slovenia

Duration: Jan. to Dec. 2003

The MP3 measuring line is located in the building of an old substation that belonged to the Mariborski otok hydroelectric power plant. The measuring line is in fact a powerful voltage source, the circuit of which is closed by a low resistance load, which causes high current. By measuring parameters, such as voltage, current, phase angle and others, reliable information that are used for further analyses are obtained.

International project

SLO-BiH 9/ 2002- Analyses of asymmetries in medium voltage networks 2003 Leader: Assoc. Prof. Dr. Jože Voršič, Enver Dolamić (Faculty of Electrical Engineering, University of Tuzla) Participants: Miran Horvat, Jurček Voh, Prof. Emeritus Dr. Dali Đonlagić, Izudin Kapetanović, Nadil Berbić, Rizah Memišević, Nermin Sarajlić, Branko Fošnjar, Anton Kotnik, Jože Krk, Rafo Jozić, Nehrudin Džambić, Mehmed Šahbazović Project partners: Ministry of Economics of the Republic of Slovenia, Rudnik ugljena Banovići, Rudnik ugljena Breza Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Jan. 2002 to Dec. 2003 PE - 22 Power Engineering Laboratory

In Europe the quality of electric power is generally defined by the EN 50160 standard, which describes the characteristics of electric power in LV and MV networks. There are 13 quantities that characterise power quality, 8 of them are measurable and tolerances are given for 6 of them. Substantial phenomena caused by events in high voltage networks have an impact on power quality in LV and MV networks. This can be analysed practically only when using a computer model, since it is very difficult to carry out research work and measurements in the power network.

PUBLICATIONS

Drago Dolinar, Petar Ljušev, Gorazd Štumberger, “Input-output linearising tracking control of an induction motor including magnetic saturation effects,” IEE proc., Electr. power appl., Vol. 150, No. 6, pp. 703-711, 2003.

Petar Ljušev, Drago Dolinar, Gorazd Štumberger, “Impact of magnetic saturation on the steady-state operation of the controlled induction motor,” Electrotechnical Review, Vol. 70, No. 4, pp. 190-195, 2003.

Jože Pihler, Igor Tičar, Jože Voršič, “Design and development of medium voltage metal-clad switchgear with metal partition walls,” IEEE trans. power deliv., Vol. 18, No. 2, 5 pp., 2003.

Bojan Štumberger, Viktor Goričan, Gorazd Štumberger, Anton Hamler, Mladen Trlep, Marko Jesenik, “Accuracy of iron loss calculation in electrical machines by using different iron loss models,” J. magn. magn. mater., 254/255, pp. 269-271, 2003.

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Marko Jesenik, Viktor Goričan, Mladen Trlep, “Characterization of saturation and cross-coupling effects in two-axis model of permanent magnet synchronous motor,” Prz. Elektrotech., pp. 933-935, 2003.

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Mladen Trlep, “Evaluation of saturation and cross-magnetization effects in interior permanent-magnet synchronous motor,” IEEE trans. ind. appl., Vol. 39, No. 5, pp. 1264-1271, 2003.

Bojan Štumberger, Gorazd Štumberger, Anton Hamler, Mladen Trlep, Marko Jesenik, Viktor Goričan, “Increasing of output power capability in a six-phase flux-weakened permanent magnet synchronous motor with a third harmonic current injection,” IEEE trans. magn., Vol. 39, No. 5, pp. 3343-3345, 2003.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Magnetically nonlinear and an isotropic core model of synchronous reluctance motor,” J. magn. magn. mater., 254/255, pp. 618-620, 2003. Power Engineering Laboratory PE - 23

Gregor Verbič, Ferdinand Gubina, Gorazd Škerbinek, “Stroškovni modeli zakupa rezerv delovne moči za sekundarno in terciarno regulacijo frekvence v slovenskem sistemu,” Electrotechnical Review, Vol. 70, No. 3, pp. 129-135, 2003.

Boris Bizjak, Jože Voršič, Jurij Bizjak, Marko Zeme, “Preverjanje kakovosti električne energije v zaključeni industrijski energetski mreži,” Zbornik referatov, Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 2, pp. C4-5-C4-9.

Drago Dolinar, Gorazd Štumberger, “Analysis of linear synchronous reluctance motor tracking control,” LDIA2003, 4th International symposium on linear drives for industry applications, Austin Court, Birmingham, UK, Sep. 2003, pp. 347-350.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Modeling, simulation and experimental verification of IM torque control,” Proceedings of the IASTED International conference on modelling, simulation and optimization, Banff, Canada, Jul. 2003, pp. 82-87.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Torque control of an induction machine based on dynamic equilibrium,” 13. Steirisches Seminar über Regelungstechnik und Prozeßautomatisierung, Schloß Retzhof, Austria, Sep. 2003, pp. 60-79.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, AleksandarM. Stanković, “New IM torque control with implicit rotor field tracking,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 512-517.

Andrej Hanžič, Darko Koritnik, Jože Pihler, Jože Voršič, “Modeliranje ZnO prenapetostnega odvodnika s programom PSCAD/EMTDC,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 2, pp. C4-1-C4-4.

Andrej Hanžič, Darko Koritnik, Jože Pihler, Jože Voršič, “Simulation of ZnO surge protector using PSCAD/EMTDC program,” Proceedings of the 2nd DAAAM International conference on Advanced technologies for developing countries, Jun. 2003, Tuzla, Bosnia and Herzegovina, pp. 333-338.

Andrej Hanžič, Stane Merše, “Razpršena proizvodnja v tržnih razmerah,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 2, pp. C1-41-C1-44.

Andrej Hanžič, Jože Pihler, Jože Voršič, “Izboljšanje izkoristka ob vključitvi parne turbine v kombiniran prostor za proizvodnje električne energije,” 12. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2003. PE - 24 Power Engineering Laboratory

Andrej Hanžič, Jože Voršič, “Development of solar cell model with SPICE,” Solar-Wind- Hydrogen/Fuel cells renewable energies, 1st SWH International conference, Segovia, Spain, Jul. 2003, pp. 89-91.

Peter Kitak, Jože Pihler, Igor Tičar, “Avtomatska generacija mreže z izoparametričnimi končnimi elementi,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 171-174.

Jože Pihler, Igor Tičar, Mitja Kos, Jožef Horvat, “Ohišje taljivih vložkov SN kovinsko okloplenega stikalnega bloka izoliranega s plinom SF [spodaj] 6,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 1, pp. B3-11-B3-15.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Determination of a dynamic radial active magnetic bearing model using the finite element method,” XI. International symposium on electromagnetic fields inelectrical engineering, ISEF 2003, Maribor, Slovenia, sept. 2003, Vol. 2, pp. 581-584.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Determination of force and flux linkage characteristics of radial active magnetic bearings,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 442-444.

Boštjan Polajžer, Gorazd Štumberger, Jožef Ritonja, Drago Dolinar, Kay Hameyer, “Impact of magnetic nonlinearities and cross coupling effects on properties of radial active magnetic bearings,” Compumag 2003 Conference proceedings, 2003.

Janez Ribič, Nermin Sarajlić, Jože Voršič, “Ozemljila v temeljih - nasprotujoča mnenja izvedencev različnih strok,” Šesto savjetovanje BH komiteta, Neum, Bosnia and Herzegovina, Oct. 2003.

Nermin Sarajlić, Izudin Kapetanović, Nadil Berbić, JožeVoršič, “Primjena programskog paketa EMTDC u analizi poprečnih nesimetrija sistema generatorskih ekraniziranih sabirnica,” Šesto savjetovanje BH komiteta, Neum, Bosnia and Herzegovina, Oct. 2003.

Gorazd Štumberger, Drago Dolinar, “Moči in ortogonalne razstavitve toka v trifaznih sistemih,” 12. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2003.

Gorazd Štumberger, Drago Dolinar, Bojan Štumberger, “Characteristics of saturated linear synchronous reluctance motor determined experimentally by the controlled VSI,” 4th International symposium on linear drives for industry applications, Austin Court, Birmingham, UK, Sep. 2003, pp. 523-526. Power Engineering Laboratory PE - 25

Gorazd Štumberger, Drago Dolinar, Jože Voršič, “Analiza trifaznih sistemov v primeru prisotnosti nesimetrij in višjih harmonskih komponent,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 2, pp. C4-11-C4-16.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Parameterization coupling model of saturated linear synchronous reluctance motor and its parameters,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 829-834.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Two-axis dynamic model of linear synchronous reluctance motor with magnetically nonlinear and anisotropic iron core,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 225-229.

Gorazd Štumberger, Damir Žarko, Mehmet Timur Aydemir, Thomas A. Lipo, “Design and comparison of linear synchronous motor and linear induction motor for electromagnetic aircraft launch system,” Proceedings of the IEMDC 2003 IEEE International Electric Machines and Drives Conference, Madison, Wisconsin, USA, Jun. 2003, pp. 494-500.

Simon Tajnšek, Jože Pihler, Igor Tičar, Moma Stojkovič, “Nov sistem srednjenapetostnih nadzemnih vodov s kompozitnimi izolatorji,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 209-212.

PRESENTATIONS BY THE LABORATORY MEMBERS

Andrej Hanžič: “5E Universities project, (EU SAVE),” presentation of partial results, University Of Dortmund, Germany, Apr. 1, 2003.

Andrej Hanžič: “Modeling solar cell with SPICE program,” presentation of research results, University Of Segovia, Spain, July 7, 2003.

Andrej Hanžič: “5E Universities project, (EU SAVE),” presentation of partial results, University Of Coimbra, Portugal, Sept. 18, 2003.

Janez Ribič: “Grounding in foundations - contradictory opinion of different professions,” lecture at CIGRE-BH Conference, Bosnia and Herzegovina, Sept. 29, 2003.

Andrej Hanžič: “Study on improving efficiency with including steam turbine into combined unit for production of electric energy,” presentation of research results, University Of Brussels, Belgium, Oct. 16, 2003. PE - 26 Power Engineering Laboratory

VISITS TO OTHER INSTITUTIONS

Janez Ribič: Training for NEPLAN Reliability and Investment calculation, seminar participation, Mannheim, Germany, Jan. 22–24, 2003.

Andrej Hanžič, MSc, Visit to University of Dortmund, visit, Dortmund, Assoc. Prof. Dr. Jože Voršič: Germany, Apr. 1–3, 2003.

Assoc. Prof. Dr. Jože Pihler: Co-operation on mutual project, scientific collaboration, Graz, Austria, June 16, 2003.

Andrej Hanžič, MSc: Visit to University of Segovija, visit, Segovia, Spain, July 7–11, 2003.

Assoc. Prof. Dr. Jože Voršič: Cooperation in Energy Committee of European Commission for 6TH Framework Programme, project meeting participation, Brussels, Belgium, July 16, 2003.

Andrej Hanžič, MSc: Visit to University of Coimbra, Coimbra, Portugal, Sept. 18–19, 2003.

Andrej Hanžič, MSc: Visit to University of Brussels, Brussels, Belgium, Oct. 16–17, 2003.

Andrej Hanžič, MSc, Lecture in connection with mutual bosnian-slovenia Andrej Korak, research project, visit, Tuzla, Bosnia and Assoc. Prof. Dr. Jože Pihler, Herzegovina, Nov. 10, 2003. Janez Ribič, Marjan Stegne, Assoc. Prof. Dr. Jože Voršič:

Assoc. Prof. Dr. Jože Voršič: Cooperation in Energy Committee of European Commission for 6TH Framework Programme, project meeting participation, Brussels, Belgium, Nov. 24, 2003.

GUESTS AND VISITORS

Prof. Dr. Oscar Biro, Co-operation on mutual project with Fundamentals Power Engineering Laboratory PE - 27

Prof. Dr. Kurt Preis and Theory of Electrotechnics Laboratory, FERI (Institut für Grundlagen und Theorie Maribor, scientific collaboration, Mar. 25, 2003. der Elektrotechnik, Graz, Austria):

Prof. Dr. Oscar Biro, Co-operation on mutual project with Fundamentals Prof. Dr. Kurt Preis and Theory of Electrotechnics Laboratory, FERI (Institut für Grundlagen und Theorie Maribor, scientific collaboration, Dec. 4, 2003. der Elektrotechnik, Graz, Austria):

PE - 28 Electromechanical Systems Control Laboratory

ELECTROMECHANICAL SYSTEMS CONTROL LABORATORY

Head: Prof. Dr. Bojan Grčar Phone: +386 2 220 70 71 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Research and development projects

AVLSRM Analiza in vodenje linearnega sinhronskega reluktančnega motorja (LSRM) (Analysis and control of Linear Synchronous Reluctance Motor (LSRM)) Leader: Prof. Dr. Drago Dolinar Participants: Assoc. Prof. Dr. Gorazd Štumberger, Prof. Dr. Bojan Grčar, Kay Hameyer, Asst. Prof. Dr. Bojan Štumberger The subject under investigation was the modelling and control design of a high performance drive using Linear Synchronous Reluctance Machine (RSLM). A nonlinear dynamic model of the LSRM was developed, verified and validated. This model contains a magnetically nonlinear and anisotropic model of the LSRM iron core, and the postional and current- dependent characteristics of the thrust and friction force. All required characteristics were determined experimentally. A non-linear control design was applied to reduce the position tracking error at low speed operation mode.

SAML Sistem aktivnih magnetnih ležajev (Active magnetic bearing system) Leader: Prof. Dr. Drago Dolinar Participants: Assoc. Prof. Dr. Gorazd Štumberger, Asst. Prof. Dr. Jožef Ritonja, Dr. Oto Težak, Dr. Boštjan Polajžer, Kay Hameyer Electromechanical Systems Control Laboratory PE - 29

An experimental system of active magnetic bearings was developed resulting from this research project. The design of magnetic bearings was achieved in cooperation with the KU Leuven, ESAT/ELEN, Professor K. Hameyer. The development of the power supply, electronics and the control is based on our knowledge and experiences. Magnetic bearing force was measured in order to determine the mathematical model by analytically continuous functions. A control design was implemented based on the derived mathematical model. The improvement of the static and dynamic system performances was established. We realized the design as well as manufacturing the experimental system of active magnetic bearings. The modular type of realization and the user friendly control desk make it possible to use this system in applied and theoretical research as well as for educational purposes.

RR-61-2596 Sistem za vodenje, zaščito in lokalno avtomatizacijo v EES (System for control, protection and local automation in power systems) Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Assoc. Prof. Dr. Gorazd Štumberger, Asst. Prof. Dr. Jožef Ritonja, Dr. Oto Težak, Dr. Boštjan Polajžer Financed by: Iskra SYSEN, d. o. o., Ministry of Education, Science and Sport of the Republic of Slovenia

This project considers the operation of numerical distance relays which are used as a basic protection against short-circuits in medium- and high voltage mashed networks. From the functional structure these relays are the most complex since they include a number of dependent tasks. This method of digital processing of current and voltage signals represents the most important issue for selective, fast and reliable relay operation, representing in addition the hardware and measurement transducers. In practical implementation, several disturbances can deteriorate the obtained result with significant impact on relay selectivity and response speed. In the high voltage interconnection networks even instability could occur, as the consequence of inadmissible delays. This project considers the influence of: higher harmonics in measured signals, a-periodical component, arc resistance, change of frequency, current transformer saturation and system oscillations. Distance protection algorithms most often cited in the literature or used in practice were examined (Ibrahim- Phadke, LSQ, dynamic phasors, parameter estimation based on system of difference equations without corrections and adaptive algorithm with variable data window) from the sensitivity viewpoint according to the listed disturbances. PE - 30 Electromechanical Systems Control Laboratory

Industrial projects

SRMASM Experimentalna analiza SRM in ASM (Experimental analysis of SRM and IM) Leader: Prof. Dr. Drago Dolinar Participants: Assoc. Prof. Dr. Gorazd Štumberger, Prof. Dr. Ivan Zagradišnik Project partners: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o. Financed by: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

A complete experimental comparative analysis was done between the equivalent synchronous reluctance cylindrical machine and the induction machine. The steady state characteristics of both machines are more or less the same while the warming of the rotor is much smaller in the case of the reluctance machine.

AAPV_Medvode Analiza ustreznosti enopolnega in tripolnega APV-ja za RTP Medvode (Analysis of single phase and three phase automatic reclose for RTP Medvode) Leader: Prof. Dr. Bojan Grčar Participants: Prof. Dr. Drago Dolinar, Asst. Prof. Dr. Jožef Ritonja Project partners: ELES Slovenia Financed by: ELES Slovenia

This study discusses the adequateness of single phase and three phase automatic reclose for RTP Medvode, considering the actual state and possible growth of a power system. A load flow analysis was calculated for evaluation of the impact of reconfiguration of the 110 kV distribution network. Transients for different faults and different network configuration were simulated for evaluation the impact of single phase, or three phase automatic reclose on the 110-kV network operation.

PUBLICATIONS

Drago Dolinar, Petar Ljušev, Gorazd Štumberger, “Input-output linearising tracking control of an induction motor including magnetic saturation effects,” IEE proc., Electr. power appl., Vol. 150, No. 6, pp. 703-711, 2003.

Petar Ljušev, Drago Dolinar, Gorazd Štumberger, “Impact of magnetic saturation on the steady-state operation of the controlled induction motor,” Electrotechnical Review, Vol. 70, No. 4, pp. 190-195, 2003. Electromechanical Systems Control Laboratory PE - 31

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Marko Jesenik, Viktor Goričan, Mladen Trlep, “Characterization of saturation and cross-coupling effects in two-axis model of permanent magnet synchronous motor,” Prz. Elektrotech., pp. 933-935, 2003.

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Mladen Trlep, “Evaluation of saturation and cross-magnetization effects in interior permanent-magnet synchronous motor,” IEEE trans. ind. appl., Vol. 39, No. 5, pp. 1264-1271, 2003.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Magnetically nonlinear and anisotropic core model of synchronous reluctance motor,” J. magn. magn. mater., 254/255, pp. 618-620, 2003.

Oto Težak, Drago Dolinar, Miro Milanovič, “Experimental evaluation of MOS-FET snubber circuit,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 146-150.

Drago Dolinar, Gorazd Štumberger, “Analysis of linear synchronous reluctance motor tracking control,” 4th International symposium on linear drives for industry applications, Austin Court, Birmingham, UK, Sep. 2003, pp. 347-350.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Modeling, simulation and experimental verification of IM torque control,” Proceedings of the IASTED International conference on modelling, simulation and optimization, Banff, Canada, Jul. 2003, pp. 82-87.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Torque control of an induction machine based on dynamic equilibrium,” 13. Steirisches Seminar über Regelungstechnik und Prozeßautomatisierung, Schloß Retzhof, Austria, Sep. 2003, pp. 60-79.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, Aleksandar M. Stanković, “New IM torque control with implicit rotor field tracking,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 512-517.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Determination of a dynamic radial active magnetic bearing model using the finite element method,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 581-584.

Boštjan Polajžer, Gorazd Štumberger, Drago Dolinar, Kay Hameyer, “Determination of force and flux linkage characteristics of radial active magnetic bearings,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 442-444. PE - 32 Electromechanical Systems Control Laboratory

Boštjan Polajžer, Gorazd Štumberger, Jožef Ritonja, Drago Dolinar, Kay Hameyer, “Impact of magnetic nonlinearities and cross coupling effects on properties of radial active magnetic bearings,” Compumag 2003 Conference proceedings, 2003.

Gorazd Štumberger, Drago Dolinar, “Moči in ortogonalne razstavitve toka v trifaznih sistemih,” 12. mednarodno posvetovanje Komunalna energetika, Maribor, Slovenia, May 2003.

Gorazd Štumberger, Drago Dolinar, Bojan Štumberger, “Characteristics of saturated linear synchronous reluctance motor determined experimentally by the controlled VSI,” 4th International symposium on linear drives for industry applications, Austin Court, Birmingham, UK, Sep. 2003, pp. 523-526.

Gorazd Štumberger, Drago Dolinar, Jože Voršič, “Analiza trifaznih sistemov v primeru prisotnosti nesimetrij in višjih harmonskih komponent,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 2, pp. C4-11-C4-16.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Parameterization coupling model of saturated linear synchronous reluctance motor and its parameters,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 829-834.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Two-axis dynamic model of linear synchronous reluctance motor with magnetically nonlinear and anisotropic iron core,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 225-229.

PRESENTATIONS BY THE LABORATORY MEMBERS

Drago Dolinar: “Modelling and Control of Electrical Machines,” invited lecture, Bethune, France, Apr. 7, 2003.

Bojan Grčar: “Torque control of an induction machine based on dynamic equilibrium,” invited lecture, Boston, United States, Apr. 25, 2003.

Bojan Grčar: “Torque Control of an induction machine based on dynamic equilibrium,” invited lecture, Retzhof, Austria, Sept. 15, 2003.

Drago Dolinar: “Modelling and Control of Electrical Machines,” invited lecture, Bethune, France, Oct. 13, 2003. Electromechanical Systems Control Laboratory PE - 33

Bojan Grčar: “IM torque control with implicit rotor flux tracking and efficiency maximization,” invited lecture, Linz, Austria, Nov. 18, 2003.

Jožef Ritonja: “Programmable Logic Controllers,” invited lecture, Bethune, France, Dec. 8, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Dr. Oto Težak: Automation in Industry and Commerce, conference, organisation and implementation, Maribor, Slovenia, Apr. 10–11, 2003.

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Drago Dolinar, Visit to Research Laboratories of Siemens - Power Prof. Dr. Bojan Grčar, Transmission and Distribution Group, formal call, Asst. Prof. Dr. Jožef Ritonja: Erlangen, Germany, Mar. 10, 2003.

Assoc. Prof. Dr. Peter Cafuta, Visit to Siemens Training Centre, visit, Nuernberg- Prof. Dr. Drago Dolinar, Moorenbrunn, Germany, Mar. 11, 2003. Prof. Dr. Bojan Grčar, Asst. Prof. Dr. Jožef Ritonja:

Prof. Dr. Drago Dolinar: Research co-operation, research work, Leuven, Belgium, Mar. 30 to Apr. 12, 2003.

Prof. Dr. Drago Dolinar: Socrates- Erasmus visit, visit, Tarragona, Spain, Apr. 26 to May 3, 2003.

Assoc. Prof. Dr. Gorazd Štumberger: Scientific collaboration and visit in the WENPEC laboratory, formal call, Madison, United States, May 30 to June 6, 2003.

Asst. Prof. Dr. Jožef Ritonja: Research work, research work, Bethune, France, Dec. 8–19, 2003.

GUESTS AND VISITORS

Olaf Ruhle Invited lecture entitled "NETOMAC application for PE - 34 Electromechanical Systems Control Laboratory

(Siemens AG, Power Transmission power system protection design and and Distribution, Services, Network parametrisation", scientific collaboration, June 16– Analysis and Consulting, Erlangen, 17, 2003. Germany):

Kay Hameyer Laboratory visiting, work on the research project, (Katholieke Universiteit Leuven, Sept. 2003, research work, Sept. 25–26, 2003. Leuven, Belgium):

Olaf Ruhle Research work with the NETOMAC, scientific (Siemens AG, Power Transmission collaboration, Oct. 8–10, 2003. and Distribution, Services, Network Analysis and Consulting, Erlangen, Germany):

DECORATIONS, AWARDS, AND HONOURS

Dr. Oto Težak: best paper award, for the Symposium Engineering and Industrial Systems, Modelling, Optimization, Simulation, Control, to the contribution: Intelligent controller validation methodology, Aug. 16, 2003.

Fundamentals and Theory of Electrotechnics Laboratory PE - 35

FUNDAMENTALS AND THEORY OF ELECTROTECHNICS LABORATORY

Head: Prof. Dr. Igor Tičar Phone: +386 2 220 71 50 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

L2-4435-0796-02 Nov sistem srednjenapetostnih daljnovodov (New system of mediumvoltage powerlines) Leader: Assoc. Prof. Dr. Jože Pihler Participants: Assoc. Prof. Dr. Jože Voršič; Andrej Hanžič, MSc; Darko Koritnik, MSc; Marjan Stegne; Prof. Dr. Igor Tičar Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, TEHMAR proizvodnja, inženiring in trgovina, d. o. o.

The goal of this research is to develop a new system of non-insulated and semi-insulated medium voltage long-distance transmission conductors, where special attention should be paid to their influences on the environment. In the year 2003 the Laboratory of Fundamentals and Theory in Electrotechnics and the Power Engineering Laboratory participated in the mentioned project. With the help of the numerical analysis of electromagnetic field, performed by the Elefant programme package, we carried out a comparison between two different methods for fastening insulators – so far the generally used fastening method for semi- insulated conductors and a new method with new composite insulators. The results of the performed analyses confirmed that the suggested new system of semi-insulated conductors is much more appropriate than the system used before. Better mutual adjustment of the dielectric constants of the insulator material and of the semi-insulated conductor material, resulting from this new system, leads to much a more uniformly distributed electric field. Calculation of the electric field proved that even at one meter under the lowest conductor, the PE - 36 Fundamentals and Theory of Electrotechnics Laboratory

electric field does not exceed the limit values, which could be hazardous to humans.

International projects

Slo-A19/2002 Virtual Electromagnetic Laboratory and Web-based Distance Learning Leader: Prof. Dr. Igor Tičar Participants: Assoc. Prof. Dr. Jože Pihler; Assoc. Prof. Dr. Anton Hamler; Andrej Orgulan, MSc; Mitja Žnidarič; Prof. Dr. Kurt Preis; Prof. Dr. Oscar Biro; Peter Kitak; Andrej Stermecki Project partners: Institut für Grundlagen und Theorie der Elektrotechnik Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Cooperation on this project started in 2002 and continued in 2003. Members of the Laboratory of Fundamentals and Theory in Electrotehnics FERI and the Institut für Grundlagen und Theorie der Elektrotechnik (IGTE) TU Graz developed programme packages for electromagnetic and thermal field calculations. Cooperation at the Maribor end was focused on an automatic mesh generator for the preprocessor in the Elefant programme, as well as to upgrade the same programme for possibly analysing coupled electromagnetic and thermal fields. Efforts were also made in the direction of linking the Ansys commercial programme package and the Elefant IGTE program. The described programme tools were used to solve applicative problems in industry, for student- graduate and postgraduate studies and postgraduate individual research work.

PUBLICATIONS

Jože Pihler, Igor Tičar, Jože Voršič, “Design and development of medium voltage metal-clad switchgear with metal partition walls,” IEEE trans. power deliv., Vol. 18, No. 2, 5 pp., 2003.

Kurt Preis, Oszkar Bíró, Peter Supancic, Igor Tičar, “FEM simulation of thermistors including dielectric effects,” IEEE trans. magn., Vol. 39, No. 3, pp. 1733-1736, 2003.

Miro Žunec, Franc Jakl, Igor Tičar, “Skin effect impact on current density distribution in OPGW cables,” Electrotechnical Review, Vol. 70, No. 1/2, pp. 17-21, 2003.

Oszkar Biró, Kurt Preis, Igor Tičar, “A FEM method for eddy current analysis in laminated media,” XI. International symposium on electromagnetic fields in electrical engineering, ISEF 2003, Maribor, Slovenia, Sep. 2003, Vol. 1, pp. 9-14. Fundamentals and Theory of Electrotechnics Laboratory PE - 37

Oszkar Biró, Kurt Preis, Ulricke Baumgartner, Igor Tičar, “Treatment of eddy currents in laminated media by FEM,” 48. Internationales Wissenschaftliches Kolloquium, Sep. 2003.

Oszkar Bíró, Kurt Preis, Gerhard Buchgraber, Igor Tičar, “Voltage driven coils in finite element formulations using a current vector and a magnetic scalar potential,” Compumag 2003.

Peter Kitak, Jože Pihler, Igor Tičar, “Avtomatska generacija mreže z izoparametričnimi končnimi elementi,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 171-174.

Jože Pihler, Igor Tičar, Mitja Kos, Jožef Horvat, “Ohišje taljivih vložkov SN kovinsko okloplenega stikalnega bloka izoliranega s plinom SF6,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 1, pp. B3-11-B3-15.

Kurt Preis, Oszkar Bíró, Peter Supancic, Igor Tičar, “Time domain analysis of quasi-static electric fields in media with frequency dependent permittivity,” Compumag 2003 Conference proceedings.

Simon Tajnšek, Jože Pihler, Igor Tičar, Moma Stojkovič, “Nov sistem srednje napetostnih nadzemnih vodov s kompozitnimi izolatorji,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 209-212.

Igor Tičar, Miljenko Križmarić, Peter Kitak, Oszkar Biró, Kurt Preis, “Impact of surrounding conductive metal objects on specific absorption rate (SAR) in phantom head, caused by the radiation of mobile phones,” XI. International symposium on electromagnetic fields in electrical engineering, Sep. 2003, Maribor, Slovenia, Vol. 2, pp. 913-918.

Igor Tičar, Andrej Stermecki, Ivan Zagradišnik, “Numerical analysis of the brushless motor magnetic field and torque,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 847-852.

Miro Žunec, Igor Tičar, Franc Jakl, Kurt Preis, “Temperature investigations at a multilayer ACSR 490/65 conductor and OPGW cable,” Šesta konferenca slovenskih elektroenergetikov, Portorož, Slovenia, May 2003, CIGRÉ 1, pp. B2-53-B2-57.

VISITS TO OTHER INSTITUTIONS

Peter Kitak: Cooperation on common project with IGTE TU Graz, research work, Graz, Austria, Jan. 27–31, 2003. PE - 38 Fundamentals and Theory of Electrotechnics Laboratory

Prof. Dr. Igor Tičar: Cooperation on common project with IGTE TU Graz, research work, Graz, Austria, Feb. 12, 2003.

Prof. Dr. Igor Tičar: Cooperation on common project with IGTE TU Graz, research work, Graz, Austria, Apr. 14, 2003.

Prof. Dr. Igor Tičar: Cooperation on common project with IGTE TU Graz, research work, Graz, Austria, June 16, 2003.

Peter Kitak, Cooperation on common project with IGTE TU Andrej Stermecki, Graz, research work, Graz, Austria, Nov. 20–21, Prof. Dr. Igor Tičar: 2003.

GUESTS AND VISITORS

Prof. Dr. Kurt Preis, Cooperation on common project with Fundamentals Prof. Dr. Oscar Biro and Theory of Electrotechnics Laboratory, FERI (Institut für Grundlagen und Theorie Maribor, research work, Mar. 25, 2003. der Elektrotechnik, Graz, Austria):

Wolfgang Rucker Cooperation on applied projects, research work, (Inštitut za teorijo elektromagnetnih Sept. 9, 2003. polj, Univerza Stuttgart, Stuttgart, Germany):

Tomaž Slivnik Participation in education process in the field of (Faculty of Electrical Engineering, Fundamentals and Theory of electromagnetic Univesity of Ljubljana, 1000 Ljubljana, fields, formal call, Nov. 21, 2003. Slovenia):

Prof. Dr. Kurt Preis, Cooperation on common project with Fundamentals Prof. Dr. Oscar Biro and Theory of Electrotechnics Laboratory, FERI (Institut für Grundlagen und Theorie Maribor, research work, Dec. 4–5, 2003. der Elektrotechnik, Graz, Austria):

Applied Electromagnetics Laboratory PE - 39

APPLIED ELECTROMAGNETICS LABORATORY

Head: Assoc. Prof. Dr. Mladen Trlep Phone: +386 2 220 70 41 E-mail: [email protected]

International symposium ISEF 2003. PE - 40 Applied Electromagnetics Laboratory

RESEARCH PROJECTS

Current research projects

Basic research project

Z2-5349-796 Načrtovanje in uporaba opreme za dinamično emulacijo mehanskih bremen (Design and use of equipment for dynamic emulation of mechanical loads) Leader: Assoc. Prof. Dr. Mladen Trlep Participants: Dr. Miran Rodič Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Dynamic emulation of mechanical loads is a new method for the development of products, which’s used to shorten the time period passing between the idea and realization of the final product. Different to conventional simulations, which are performed only on a computer, this complete drive system is available. Instead, to the actual driven system it is mechanically connected to the system performing active loading. Thus, instead of a simulation model, an electromechanical system is included, which we plan to use in the final application, whereas in place of the driven mechanism an electromechanical system is used, performing dynamic emulation of the mechanical load. Thus even in the phase of product design it is possible to execute specific tests, for which the prototype would be required. This enables not only a shorter time period passing from the idea to the product, but also increased productivity of the development team. It is also an important fact, that the same system can be used for the development of a higher number of products, which is especially important, when the product is unique or of a limited series. This method can also be used for other procedures and educational purposes. The possibility for use in testing, where tests can be performed under specifically defined conditions, is especially important. This feature is hard to satisfy on the prototype. Additionally, it is possible to ensure high repeatability of tests, which is particularly important in the error searching phase. Perhaps the most important fact is that conventional static load tests are insufficient for the testing of variable speed and torque loads, and, therefore, don't satisfy the requirements of the development, validation and testing. This research project has the intention of performing research in the field of the development and building of dynamic load emulation systems used for dynamic emulation of mechanical loads. Libraries will be created including models of various mechanical systems (pumps, fans, electrical vehicles, ...). Models will be tested and evaluated on the practical examples. Applied Electromagnetics Laboratory PE - 41

The final product of research will be the generally applicable system,. which will enable the user testing of the electrical drives and algorithms for their control in the wide range of the target mechanical components and devices.

Applied projects

L2-5140-0796-03 Elektronsko komutirani elektromotorji za posebne namene (Brushless DC motors for special purposes) Leader: Asst. Prof. Dr. Bojan Štumberger Participants: Prof. Dr. Ivan Zagradišnik; Bojan Slemnik, MSc; Matej Gajzer; Miralem Hadžiselimovič; Assoc. Prof. Dr. Riko Šafarič; Mirko Petrovčič Project partners: Rotomatika, d. o. o. Financed by: Rotomatika, d. o. o., Ministry of Education, Science and Sport of the Republic of Slovenia

The subjects of this research are permanent magnet synchronous motors with outer (exterior) or classical internal rotors. The goal of the research is the design and development of a synchronous permanent magnet motor with outer rotor for fan drive applications. This permanent synchronous magnetic motor should be exchangeable with the existing induction motor regarding its construction, have better efficiency and produce lower noise levels. Special attention was devoted to proper design selection of rotor construction for achieving the desired motor characteristic at unaltered stator construction. Anisotropic ferrite material has been selected for permanent magnet motor material. Geometry optimization of the permanent magnet segments and optimization of stator winding was accomplished in order to achieve the desired motor characteristic, minimization of total torque ripple and efficiency improvement. Gluing of pre-magnetized permanent magnet segments in rotor construction is fraught with several difficulties. Therefore, an impulse-magnetizing fixture was designed and manufactured, which enables multi-pole post-assembly magnetization of permanent magnet segments after final assembling of magnet segments into the rotor construction. Measurements of motor prototype characteristics give expected results. PE - 42 Applied Electromagnetics Laboratory

Research and development projects

AEPOSS Analiza elektromagnetnega polja v okolici strelovodnih sistemov (Analysis of the electromagnetic field around the lightning conductor systems) Leader: Assoc. Prof. Dr. Mladen Trlep Participants: Assoc. Prof. Dr. Anton Hamler, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan Financed by: Applied Electromagnetics Laboratory

The purpose of this project is an analysis of the electromagnetic field around lightening systems. Firstly two fields of research are investigated. The first field of research is treatment of the lightning mechanism of spreading in the nonhomogeneous area with time changing characteristics. The second field of research is oriented to a search for methods for exact calculation of the electromagnetic field, which is required for a quality solution of this problem. In the first phase the finite element method is chosen, which is appropriate for the problem demands about calculation accuracy, and possible detailed definition of space characteristics.

Industrial projects

OTISDM Osvajanje tehnologije izdelave sestavnih delov motorjev iz stiskanih in brizganih mehko in trdomagnetnih kompozitov in njihovo uvajanje v redno proizvodnjo (Development of technology for the production of motor components made of pressing and splashing hard and soft magnetic compositions, and their introduction into production) Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan Project partners: Iskra MEHANIZMI, d. d., Institute of Metals and Technology Financed by: Ministry of Economics of the Republic of Slovenia

This project has two aims: substitution of the lamellate magnetic circuits made of sheet metal with powder soft magnetic materials and substitution of the magnets with powder materials of the NeFeB magnet group. In both cases processes of splashing and pressing will be used. Substitution of the materials will reduce the volume of the used materials, because there is no waste when using these technologies, on the other hand, the electromotors made of these Applied Electromagnetics Laboratory PE - 43

parts will be more efficient. Mentioned technology will bring big simplification and price reduction in the regular technology. The first samples of the two-pole induction motor were made, and they are at the testing stage. The first results are advantageous, but they indicate the necessity for changing the shapes some magnetic circuit parts against the shapes of the magnetic circuits when using classics magnetic materials.

NMES Numerični modeli elektromagnetnih struktur (Numerical modelling of electromagnetic structures) Leader: Assoc. Prof. Dr. Mladen Trlep, Prof. Dr. Andrzej Krawczyk (Electrotechnical Institute) Participants: Prof. Emeritus Dr. Božidar Hribernik, Assoc. Prof. Dr. Anton Hamler, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan, S. Sikora, R. Starzynski, J. Sikora, Prof. Dr. S. Wiak Financed by: Ministry of Science and Technology of the Republic of Slovenia, Polish academy of Sciences

The work covered by this project included applications of numerical methods for electromagnetic field analysis of biological tissues together with the development of an inverse approach using the DRM method, for use in medical diagnostics. New software is being developed, which will provide some specific solutions and will be adapted to the existing programme’s solutions. The second Slovenian – Polish seminar on the subject of application electromagnetism was conducted during this project.

MS32 Izdelava prototipa in osvajanje pilotne proizvodnje stikala MS 32 (Production of prototype and preparing pilot production of the switch MS 32) Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep; Boris Bizjak, MSc; Asst. Prof. Dr. Marko Jesenik; Asst. Prof. Dr. Bojan Štumberger; Viktor Goričan; G. Hrovat Financed by: Iskra Stikala, d. d., Ministry of Economy

This project was related to the development of a technically pretentious motor protection switch, the production of which will be cheaper than the production of existing less pretentious switches. Our job in this project was to analyse the magnetic, electrical and heating conditions, already done from the basic idea of switch construction. Because the construction of this type of switch is defined as 70% of costs, it bears the main burden of the switch price. The construction has, likewise, a basic influence on switch efficiency, which can be changed during development and switch construction only, as in earlier mentioned PE - 44 Applied Electromagnetics Laboratory

analysis. Pilot switch production is in the stage of testing.

OMCSM Optimizacija magnetnega kroga iz kompozitnega materiala sinhronskega motorja (Optimization of a magnetic circuit made of the composite material of the synhronous motor) Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan Financed by: Iskra MEHANIZMI, d. d.

To decrease the prices of the synhronous motors, it is possible to use composite materials for magnetic circuit production. The technology for modelling the composite materials makes cheaper mass production possible and there is no waste material as when using the modelling of classical materials. The magnetic properties of the composite materials are a slightly worse than the magnetic properties of the classic materials and, because of this, the magnetic circuit must be adapted for the composite materials which was the aim of this project.

RMCBS Preoblikovanje magnetnega kroga biled prikazovalnika (Remodeling of the magnetic circuit of the biled display) Leader: Assoc. Prof. Dr. Anton Hamler Participants: Assoc. Prof. Dr. Mladen Trlep, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan Financed by: Iskra MEHANIZMI, d. d.

BILED display is made of bistable electromechanical connection, which is for better visibility in darker conditions equipped with LED diode. Electromechanical connection is geometrically simple, but magnetically it is very complex, which requires materials with very specific magnetic properties. The aim of the project was to produce the electromechanical connection in which the magnetic influence between the neighbouring points will be as small as possible, in which the construction of the display will be as simple as possible with a small number of component parts, which will work reliably in all weather conditions, which will make possible high level of production automatization and in which cheaper materials will be used than in the current realization. Applied Electromagnetics Laboratory PE - 45

PUBLICATIONS

Viktor Goričan, Anton Hamler, Marko Jesenik, Bojan Štumberger, Mladen Trlep, “Unreliable determination of vector B in 2-D SST,” J. magn. magn. mater., 254/255, pp. 130-132, 2003.

Olaf Henze, Wolfgang M. Rucker, Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Hysteresis model and examples of ferromagnetic materials,” IEEE trans. magn., Vol. 39, No. 3, pp. 1151-1154, 2003.

Gorazd Hrovat, Anton Hamler, Mladen Trlep, Martin Bizjak, “Analiza segretja motorskega zaščitnega stikala pritrajni tokovni obremenitvi,” Inf. MIDEM, Vol. 33, No. 1(105), pp. 32-37, 2003.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Calculation of the rotational magnetic field in the sample of the rotational single sheet testers,” Prz. Elektrotech., pp. 920-922, 2003.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Field homogeneity in a two-phase rotational single sheet tester with square sample,” IEEE trans. magn., Vol. 39, No. 3, pp. 1495-1498, 2003.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Field homogeneity in a two-phase round rotational single sheet tester with one and both side shields,” J. magn. magn. mater., 254/255, pp. 247-249, 2003.

Bojan Štumberger, Viktor Goričan, Gorazd Štumberger, Anton Hamler, Mladen Trlep, Marko Jesenik, “Accuracy of iron loss calculation in electrical machines by using different iron loss models,” J. magn. magn. mater., 254/255, pp. 269-271, 2003.

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Marko Jesenik, Viktor Goričan, Mladen Trlep, “Characterization of saturation and cross-coupling effects in two-axis model of permanent magnet synchronous motor,” Prz. Elektrotech., pp. 933-935, 2003.

Bojan Štumberger, Gorazd Štumberger, Drago Dolinar, Anton Hamler, Mladen Trlep, “Evaluation of saturation and cross-magnetization effects in interior permanent-magnet synchronous motor,” IEEE trans. ind. appl., Vol. 39, No. 5, pp. 1264-1271, 2003.

Bojan Štumberger, Gorazd Štumberger, Anton Hamler, Mladen Trlep, Marko Jesenik, Viktor Goričan, “Increasing of output power capability in a six-phase flux-weakened permanent magnet synchronous motor with a third harmonic current injection,” IEEE trans. magn., Vol. 39, No. 5, pp. 3343-3345, 2003. PE - 46 Applied Electromagnetics Laboratory

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Magnetically nonlinear and anisotropic core model of synchronous reluctance motor,” J. magn. magn. mater., 254/255, pp. 618-620, 2003.

Mladen Trlep, Anton Hamler, Marko Jesenik, Bojan Štumberger, “The FEM-BEM analysis of complex grounding systems,” IEEE trans. magn., Vol. 39, No. 3, pp. 1155-1158, 2003.

Mladen Trlep, Janez Rozman, “The FEM analysis of the peroneal nerve stimulation in hemiplegia,” IEEE trans. magn., Vol. 39, No. 3, pp. 1543-1546, 2003.

Borivoj Šuštaršič, Albin Sirc, Polona Škraba, Ladislav Kosec, Anton Hamler, “Project research - morphological and micro structural charateristics of soft magnetic composite materials,” Technical creativity in school's curricula with the form of project learning "From idea to the product" - from the kindergarten to the technical faculty, Portorož, Slovenia, Apr. 2003, pp. 117-124.

Viktor Goričan, Marko Jesenik, Anton Hamler, Bojan Štumberger, Mladen Trlep, “Measurement of 2-D magnetic properties of grain oriented silicon steel sheet using RRSST,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 1, pp. 301-306.

Viktor Goričan, Marko Jesenik, Anton Hamler, Bojan Štumberger, Mladen Trlep, “Performance of round rotational single sheet tester (RRSST) at higher flux densities in the case of GO materials,” 7th international workshop on 1&2-dimensional magnetic measurement and testing, Lüdenscheid, Germany, Sep. 2002, pp. 143-149.

Anton Habjanič, Mladen Trlep, “Vpliv gela na lastnosti ozemljitvenega sistema,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 269-272.

Gorazd Hrovat, Viktor Goričan, Anton Hamler, “Merjenje temperatur motorskega zaščitnega stikala s termo elementi ter primerjava z izračunom,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 237-240.

Gorazd Hrovat, Anton Hamler, “The heat circumstances in switch by permanent load,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 1, pp. 247-250.

Marko Jesenik, Viktor Goričan, Mladen Trlep, Anton Hamler, Bojan Štumberger, “Eddy current effects in the sample of 2D R.R.S.S.T. and in the sample of 2D S.R.S.S.T.,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 761-764. Applied Electromagnetics Laboratory PE - 47

Dean Ogrizek, Mladen Trlep, “Inverse problem - determining unknown distribution of charge density using the dual reciprocity method,” XI. International symposium on electromagnetic fields in electrical engineering, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 523-528.

Dean Ogrizek, Mladen Trlep, “Inverzni problem iskanja neznane porazdelitve izvora in reševanje s pomočjo DRM metode,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 277-280.

Gorazd Štumberger, Drago Dolinar, Bojan Štumberger, “Characteristics of saturated linear synchronous reluctance motor determined experimentally by the controlled VSI,” 4th International symposium on linear drives for industry applications, Austin Court, Birmingham, UK, Sep. 2003, pp. 523-526.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Parameterization coupling model of saturated linear synchronous reluctance motor and its parameters,” XI. International symposium on electromagnetic fields in electrical engineering, 2003, Maribor, Slovenia, Sep. 2003, Vol. 2, pp. 829-834.

Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, “Two-axis dynamic model of linear synchronous reluctance motor with magnetically nonlinear and anisotropic iron core,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 225-229.

CONGRESSES, MEETINGS, AND COMMITTEES

Assoc. Prof. Dr. Mladen Trlep: Organising committee chairman, international symposium, 11th International Symposium on Electromagnetic Fields in Electrical Engineering (ISEF 2003), Maribor, Slovenia, Sept. 18–20, 2003.

Assoc. Prof. Dr. Anton Hamler, Organising committee member, international Asst. Prof. Dr. Bojan Štumberger, symposium, 11th International Symposium on Viktor Goričan, Electromagnetic Fields in Electrical Engineering Asst. Prof. Dr. Marko Jesenik: (ISEF 2003), Maribor, Slovenia, Sept. 18–20, 2003.

Assoc. Prof. Dr. Mladen Trlep: Member of international programme board, international symposium, Sixth International Symposium on Electric and Magntic Fields, Aachen, Germany, Oct. 6–9, 2003.

Assoc. Prof. Dr. Mladen Trlep, ISEF 2003, international symposium, organisation PE - 48 Applied Electromagnetics Laboratory

Assoc. Prof. Dr. Anton Hamler, and implementation, Maribor, Slovenia, Sept. 18– Asst. Prof. Dr. Bojan Štumberger, 20, 2003. Asst. Prof. Dr. Marko Jesenik, Viktor Goričan, Gorazd Hrovat, Anton Habjanič:

Assoc. Prof. Dr. Mladen Trlep, Second Slovenian – Polish seminar on the subject Assoc. Prof. Dr. Anton Hamler, of application electromagnetism, international Asst. Prof. Dr. Marko Jesenik, symposium, co-ordinated organisation, Cracow, Asst. Prof. Dr. Bojan Štumberger, Poland, June 16–18, 2003. Viktor Goričan:

VISITS TO OTHER INSTITUTIONS

Asst. Prof. Dr. Bojan Štumberger: Participation at scientific meeting, visit, Boston, United States, Mar. 30 to Apr. 3, 2003.

Viktor Goričan, Regular meeting in the range of Slovenian-Polish Assoc. Prof. Dr. Anton Hamler, seminar and preparing for the ISEF 2003 Asst. Prof. Dr. Marko Jesenik, conference, visit, Cracow, Poland, June 16–18, Asst. Prof. Dr. Bojan Štumberger, 2003. Assoc. Prof. Dr. Mladen Trlep:

Assoc. Prof. Dr. Anton Hamler, Participation at scientific meeting, visit, Rome, Italy, Asst. Prof. Dr. Bojan Štumberger: July 27 to Aug. 1, 2003.

Viktor Goričan: Participation at scientific meeting, visit, Dusseldorf, Germany, Sept. 9–12, 2003.

Viktor Goričan, Participation at scientific meeting, visit, Maribor, Anton Habjanič, Slovenia, Sept. 18–20, 2003. Assoc. Prof. Dr. Anton Hamler, Gorazd Hrovat, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Assoc. Prof. Dr. Mladen Trlep:

Gorazd Hrovat: Participation at scientific meeting, visit, Ljubljana, Slovenia, Sept. 25–26, 2003. Applied Electromagnetics Laboratory PE - 49

GUESTS AND VISITORS

Prof. Dr. Paolo Di Barba Meeting in the framework of the ISEF 2003 (University of Pavia, Pavia, Italy): conference and presentation of the laboratory, Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Kay Hameyer Meeting in the framework of the ISEF 2003 (Katholieke Universiteit Leuven, conference and presentation of the laboratory, Leuven, Belgium): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Yoshihiro Kawase Meeting in the framework of the ISEF 2003 (Gifu Universtiy, Gifu, Japan): conference and presentation of the laboratory, Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Adalbert Konrad Meeting in the framework of the ISEF 2003 (University of Toronto, Toronto, conference and presentation of the laboratory, Canada): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Krystyna Pawluk Meeting in the framework of the ISEF 2003 (Electrotechnical Institute, Warsaw, conference and presentation of the laboratory, Poland): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Antonio Savini Meeting in the framework of the ISEF 2003 (University of Pavia, Pavia, Italy): conference and presentation of the laboratory, Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Jan Sykulski Meeting in the framework of the ISEF 2003 (University of Southampton, conference and presentation of the laboratory, Southampton, United Kingdom): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. John Tegopoulos Meeting in the framework of the ISEF 2003 (National Technical University of conference and presentation of the laboratory, Athens, Athens, Greece): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Theodoros Tsiboukis Meeting in the framework of the ISEF 2003 (University of Thessaloniki, conference and presentation of the laboratory, Thessaloniki, Greece): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Oscar Biro Meeting in the framework of the ISEF 2003 (Institut für Grundlagen und Theorie conference and presentation of the laboratory, der Elektrotechnik, Graz, Austria): Maribor, Slovenia, Sept. 18-20, 2003. PE - 50 Applied Electromagnetics Laboratory

Prof. Dr. Kurt Preis Meeting in the framework of the ISEF 2003 (Institut für Grundlagen und Theorie conference and presentation of the laboratory, der Elektrotechnik, Graz, Austria): Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. Andrzej Krawczyk Meeting in the framework of slovenian polish (Electrotechnical Institute, Warsaw, cooperation, meeting in the framework of the ISEF Poland): 2003 conference and presentation of the laboratory, Maribor, Slovenia, Sept. 18-20, 2003.

Prof. Dr. S. Wiak Meeting in the framework of slovenian polish (Institute of Electrical Machines and cooperation, meeting in the framework of the ISEF Transformers, Technical University of 2003 conference and presentation of the laboratory, Lodz, Lodz, Poljska): Maribor, Slovenia, Sept. 18-20, 2003.

DECORATIONS, AWARDS, AND HONOURS

Assoc. Prof. Dr. Mladen Trlep, Assoc. Prof. Dr. Anton Hamler, Asst. Prof. Dr. Marko Jesenik, Asst. Prof. Dr. Bojan Štumberger, Viktor Goričan: honour to programme unit of Applied Electromagnetics for the most successfull programme unit at Faculty of Electrical Engineering and Computer Science based on the estimation of the Ministry for Education, Sciences and Sport and the shown publications, Nov. 27, 2003.

Institute of Robotics RO – 1

INSTITUTE OF ROBOTICS

Head: Prof. Dr. Karel Jezernik Phone: +386 2 220 73 00 E-mail: [email protected] URL: http://www.ro.feri.uni-mb.si

The Institute of Robotics performs basic and applied research for the development and building of robotics systems, production automatization, sensor systems, control theory, modelling, identifications, computer process control, industrial robotics, servo-systems, robot controllers, and real-time control systems. We develop advanced-control algorithms for the control of position, speed, and torque with the use of various kinds of executive modules and constructions of robotic mechanisms. We continually develop and build new educational tools to improve the quality of the educational process and to introduce new technologies to students.

In the Kinematics and Simulation Laboratory, we conduct robot and robotization kinematics control and process simulation. We use both real and simulated controllers and mechanisms. Simulations deal with virtual and real systems and processes. We also investigate nonlinear and robust control for this reason.

In the Power Electronics Laboratory, we study electronic power devices. We research resonance converters and basic structures of DC/DC converters through modulation procedures.

The Institute of Robotics co-operates with many universities abroad. In the Socrates-Erasmus project we co-operate with Universidade do Minho - Portugal, Technische Universität RO – 2 Institute of Robotics

Braunschweig - Germany, Technische Universität Wien - Austria, Universitat Politechnica de Catalunya - Spain, Universitat Rovira i Virgili - Spain, Loughborough University - United Kingdom. In the CEEPUS programme we co-operate with Technical University of Timisoara - Romania, Budapest University of Technology and Economics - Hungary, Cracow University of Technology - Poland, Vienna University of Technology - Austria in Technical University of Košice - Slovak republic.

The institute members are listed below by the laboratory with which they are affiliated.

Institute of Robotics Head: Prof. Dr. Karel Jezernik

Power Industrial Electronics Robotics Laboratory Laboratory Head: Head: Prof. Dr. Miro Milanović Prof. Dr. Karel Jezernik

Kinematics and Simulations Laboratory Head: Assoc. Prof. Dr. Peter Cafuta

Institute of Robotics RO – 3

Power Electronics Laboratory

Head: Prof. Dr. Miro Milanović

Employees: Asst. Prof. Dr. Franc Mihalič; Dr. Alenka Hren; Anton Otič, BSc

Industrial Robotics Laboratory

Head: Prof. Dr. Karel Jezernik

Employees: Assoc. Prof. Dr. Riko Šafarič; Asst. Prof. Dr. Martin Terbuc; Asst. Prof. Dr. Suzana Uran; Dr. Aleš Hace; Dr. Miran Rodič; Dr. Andreja Rojko; Janez Pogorelc, MSc; Milan Čurkovič, BSc; Gregor Edelbaher, BSc; Jože Harnik, BSc; Igor Hedrih , BSc; Jože Korelič, BSc; Dejan Kos, BSc; Rok Klobučar, BSc; Evgen Urlep, BSc

Kinematics and Simulation Laboratory

Head: Assoc. Prof. Dr. Peter Cafuta

Employees: Asst. Prof. Dr. Boris Curk; Marijan Španer, BSc RO - 4 Power Electronics Laboratory

POWER ELECTRONICS LABORATORY

Head: Prof. Dr. Miro Milanovič Phone: +386 2 220 73 30 E-mail: [email protected]

RESEARCH PROJECTS

Completed research projects 2003

Applied project

LENEL-02 Prenos energije na rotirajoče telo (The contactless energy transfer) Leader: Prof. Dr. Miro Milanovič Participants: Dr. Alenka Hren, Asst. Prof. Dr. Franc Mihalič, Jože Korelič, Anton Otič Financed by: Kolektor, d. o. o., Tehnološki center za električne stroje

Duration: Sept. to Nov. 2003

Investigation was done on contactless energy transfer to a rotating body by using a flyback converter. The analysis, synthesis and design of the 200 W converter were performed respectively. For achieving the best efficiency of the converter a looseless snubber circuit was proposed.

LENEL-03 Razvoj programske kode PŠM z uporabo naključne modulacije za enosmerni motor (Development of a randomized PWM code for a DC motor drive) Leader: Prof. Dr. Karel Jezernik Participants: Prof. Dr. Miro Milanovič, Asst. Prof. Dr. Franc Mihalič, Dr. Dušan Gleich, Dejan Kos Power Electronics Laboratory RO - 5

Duration: Aug. to Dec. 2003

Investigation and design were performed of randomized pulse-width modulation (PWM) code for a DC motor drive in an automotive environment. Nowadays, DC/DC switch mode power supply cells (Buck, Boost etc.) have to be designed, not only to meet electrical specifications, but also to comply with international electromagnetic compatibility standards (EMC). Therefore, four different randomized modulation strategies were proposed to achieve improved EMC of the DC motor drive (reduced conducted and radiated noise complied with CISPR 25).

PUBLICATIONS

Franc Mihalič, Miro Milanovič, Carlos Cuoto, “Improved frequency characteristics of the randomized PWM boost rectifier,” Int. j. electron, Vol. 90, No. 4, pp. 235-242, 2003.

Miro Milanovič, Robert Kovačič, “Small-signal model of resonant link converter,” Inf. MIDEM, Vol. 33, No. 1(105), pp. 24-31, 2003.

Suzana Uran, Miro Milanovič, “State controller for buck converter,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 381-385.

Karel Jezernik, Miran Rodič, Gregor Edelbaher, Alenka Hren, “42V tehnologija v avtomobilski industriji - sedanjost in prihodnost,” Inovativna avtomobilska tehnologija, 6. konferenca IAT'03, Koper/Portorož, Slovenia, Apr. 2003, pp. 119-126.

Franc Mihalič, Dušan Gleich, Peter Planinšič, “Automatic ripple analysis of DC-DC converter,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 160-162.

Miro Milanovič, Anton Otič, “Three-phase inverter, minimum component topology,” International conference on Electrical drives and power electronics [also] EDPE'03, The High Tatras, Slovakia, Sep. 2003, pp. 258-263.

Oto Težak, Drago Dolinar, Miro Milanovič, “Experimental evaluation of MOS-FET snubber circuit,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 146-150. RO - 6 Power Electronics Laboratory

PRESENTATIONS BY THE LABORATORY MEMBERS

Alenka Hren: “Introduction to Matlab/Simulink and its application,” continuous professional training seminar for high school teachers, Maribor, Slovenia, Dec. 5, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Miro Milanovič: Member of international programme board, international conference, The International Conference on Computer as a Tool, Ljubljana, Slovenia, Sept. 22–24, 2003.

Prof. Dr. Miro Milanovič: Reviewer, international conference, The International Conference on Computer as a Tool, Ljubljana, Slovenia, Sept. 22–24, 2003.

Prof. Dr. Miro Milanovič: Member of international programme board, international conference, The 15th International Conference on Electrical Drives and Power Electronics, Podbanske, Slovakia, Sept. 24–26, 2003.

Prof. Dr. Miro Milanovič: Co-organiser, Special session co-chair, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Prof. Dr. Miro Milanovič, Organising committee member, international Asst. Prof. Dr. Franc Mihalič, conference, IEEE International Conference on Dr. Alenka Hren: Industrial Technology, Maribor, Slovenia, Dec. 10– 12, 2003.

Asst. Prof. Dr. Franc Mihalič, Reviewer, international conference, IEEE Dr. Alenka Hren: International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Dr. Alenka Hren, ICIT'03 - IEEE International Conference on Asst. Prof. Dr. Franc Mihalič, Industrial Technology, international conference, Prof. Dr. Miro Milanovič: organisation and implementation, Maribor, Slovenia, Dec. 10–12, 2003. Industrial Robotics Laboratory RO - 7

INDUSTRIAL ROBOTICS LABORATORY

Head: Prof. Dr. Karel Jezernik Phone: +386 2 220 73 00 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

Z2-5349-796 Načrtovanje in uporaba opreme za dinamično emulacijo mehanskih bremen (Design and use of equipment for dynamic emulation of mechanical loads) Leader: Assoc. Prof. Dr. Mladen Trlep (Faculty of Electrical Engineering and Computer Science) Participants: Dr. Miran Rodič Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Dynamic emulation of mechanical loads is a new method for the development of products, which is used to shorten the time period passing between the idea and the realization of the final product. Different from conventional simulations, which are performed only on the computer, this complete drive system is available. Instead of the actual driven system it is mechanically connected to the system performing active loading. Thus, instead of a simulation model, an electromechanical system is included, which we plan to use in the final application, whereas in the place of the driven mechanism an electromechanical system is used, performing the dynamic emulation of the mechanical load. Thus even in the phase of product design it is possible to execute specific tests, for which the prototype would be required. This enables not only a shorter time period passing from the idea to the product, but also increased productivity of the development team. It is also an important fact, that the same system can be used for the development of a higher number of products, which is especially important, when the product is unique or of a limited series. This method can also be used for other procedures and educational purposes. The possibility RO - 8 Industrial Robotics Laboratory

for use in testing, where tests can be performed under specifically defined conditions, is especially important. This feature is hard to satisfy on the prototype. Additionally, it is possible to ensure the high repeatability of tests, which is particularly important in the error searching phase. Perhaps the most important fact is that conventional static load tests are insufficient for the testing of variable speed and torque loads, and therefore don't satisfy the requirements of the development, validation and testing. This research project has the intention of performing research in the field of the development and building of dynamic load emulation systems used for the dynamic emulation of the mechanical loads. Libraries will be created including models of various mechanical systems (pumps, fans, electrical vehicles, ...). Models will be tested and evaluated on practical examples. The final research product will be a generally applicable system, which will enable the user to test electrical drives and algorithms for their control in the wide range of target mechanical components and devices.

Research and development projects

CRP-KS-62/02, V5- Poučevanje in učenje s sodobnimi tehnologijami za osebe s 0639-02 in frame of posebnimi potrebami (gluhi in naglušni) CRP 2001-2006 (Teaching and learning with modern technologies for people with special needs (hearing disabled people)) Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Dr. Amor Chowdhury, Assoc. Prof. Dr. Riko Šafarič Project partners: Faculty of Electrical Engineering, Univesity of Ljubljana, Faculty of Computer and Information Sciences, Ljubljana, Faculty of Education, Ljubljana, Faculty of Education, Maribor Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Developmental changes in education are most obvious when transforming from a classic society an informational society. Unfortunately, the lack of knowledge and skills for the use of modern computer technology is still present in many educational institutions for people with special needs in Slovenia. Moreover, lower instances of professional support and help to users of new technologies is providing further problems. In addition to this, people with special needs, especially hearing impassed people, have very limited chances for further education at all levels of education. For this reason, the mentioned population sector is one of the worst educated in Slovenia. In order to find a solution to this problem, this project involves the analysis, formation and definition of activities for the needs and development of education using ICT for people with special needs (hearing impassed people) in Slovenia, and also involves didactical and Industrial Robotics Laboratory RO - 9

technological preparation for educational institutions and pedagogues. The next step, involved in the proposed project, is the widening of our work to additional analysis and defining activities for the use of ICT for leading teams and all teachers in these institutions, and with the help of seminars faster introduction and usage of ICT in the educational process. In this way, this project presents an introduction to a common national programme for the development of e-education for people with special needs (hearing impassed people) in Slovenia. This will require long-term development and composition of suitable media and materials for the education of people with special needs.

Completed research projects 2003

Applied project

LENEL-03 Razvoj programske kode PŠM z uporabo naključne modulacije za enosmerni motor (Development of a randomized PWM code for a DC motor drive) Leader: Prof. Dr. Karel Jezernik Participants: Prof. Dr. Miro Milanovič, Asst. Prof. Dr. Franc Mihalič, Dr. Dušan Gleich, Dejan Kos Duration: Aug. to Dec. 2003

Investigation and design was performed of a randomized pulsewidth modulation (PWM) code for a DC motor drive in automotive environment. Nowadays, DC/DC switch mode power supply cells (Buck, Boost etc.) have to be designed not only to meet electrical specifications, but also to comply with international electromagnetic compatibility standards (EMC). Therefore four different randomized modulation strategies have been proposed to achieve improved EMC of the DC motor drive (reduced conducted and radiated noise complied with CISPR 25).

LENEL-02 Prenos energije na rotirajoče telo (Contactless energy transfer) Leader: Prof. Dr. Miro Milanovič Participants: Dr. Alenka Hren, Asst. Prof. Dr. Franc Mihalič, Jože Korelič, Anton Otič Financed by: Kolektor, d. o. o., Tehnološki center za električne stroje

Duration: Sept. to Nov. 2003 RO - 10 Industrial Robotics Laboratory

An investigation was done of contactless energy transfer to a rotating body by using a flyback converter. The analysis, synthesis and design of a 200 W converter was performed respectively. For achieving the best converter efficiency, the looseless snubber circuit was proposed.

L2-3440 Posebni elektromotorji za sodobne servopogone (Special electrical motors for modern servo drives) Leader: Assoc. Prof. Dr. Riko Šafarič Participants: Bojan Slemnik, MSc; Matej Gajzer; Miralem Hadžiselimovič Project partners: Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o. Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Indramat elektromotorji, Proizvodnja električnih motorjev, d. o. o.

Duration: Jan. 2000 to June 2003

The subjects of this research in the scope of this project were special synchronous motors with permanent magnets, supplied by frequency converters, which are intended for use in modern servo drives. On the basis of the performed analytical work and numerical simulations we proposed to the co-financer of this project, the Indramat elektromotorji company from Železniki (Slovenia), member of Rexroth Bosch AG (Germany), a the proper combination of permanent magnet rotors and suitable stator windings. The mentioned company can rely on the achievement of desired static characteristics, as well as a smaller influence of certain higher harmonics on torque ripple – indirectly with diminished heating, which is, in general, one of the biggest problems for the producers of electrical machines. At the end of our research we modernized a numerical model of the motor, which made the transient analysis regarding the rotor position and stator excitation respectively possible. Upon the results of this analysis we concluded that the method of predicted design was correct. The results of this analysis fulfilled expectations regarding the demands about torque ripple control. These results were also in accordance with the measurement results of the prototype’s static characteristics, made by the Indramat Železniki company and measured by the Bosch Rexroth AG company. Industrial Robotics Laboratory RO - 11

Industrial project

LPA-SVI Sinergijski varilni izvor (Synergic Welding Device) Leader: Asst. Prof. Dr. Marjan Golob Participants: Janez Pogorelc, MSc; Assoc. Prof. Dr. Boris Tovornik Financed by: Varstroj, d. d.

Duration: June to Oct. 2003

This industrial project goal was to develop software for the controller of a new synergic welding device. The controller is based on a PIC 16F877 microprocessor. The specification analysis was performed and software specification was decomposed into the modules. Descriptions of input, output and intermediate variables were done and development tools (MPLAB 6.20, ICD2, HiTech C compiler on MS WinXP and MPLAB5.70, ICD1, CCS C compiler on MS Win98SE) were prepared. This software which enable welding device operation in different modes, discrete speed control of the welding wire feed, PWM control of the DC motor unit, digital read-outs (current, voltage, wire feed) and synergic parameter settings were programmed, tested and implemented into the synergic welding device prototype. This project terminated in October 2003.

International project

SLO-BIH 19/2002- New Didactic Methods Distance Learning 2003 Leader: Asst. Prof. Dr. Matjaž Debevc Participants: Assoc. Prof. Dr. Riko Šafarič, Prof. Dr. Karel Jezernik Project partners: Faculty of Electrical Engineering, University of Tuzla Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Jan. 2002 to Dec. 2003

The universities of Maribor and Tuzla have enjoyed excellent collaboration over the past few years. The development of distance education has its special place within this collaboration, since it may even deepen and widen it in all areas. The results of the project were divided into two parts: firstly a centre for distance education was formed in Bosnia and Herzegovina on the basis of research results. Secondly, the project helped in improving the quality of Slovenian distance institutions, which caused a more successful and adaptable distance education process. In the second part of the project, specific software for the distance RO - 12 Industrial Robotics Laboratory

execution of laboratory experiments was developed and allowed students to observe real laboratory processes from a distance. This process was further observed using video cameras and was published for distance viewing all over the world. The consequences of distance observation exercises are lower costs (less lecturers and assistants needed) and lower costs for laboratory equipment. In the framework of this project, the chance for the cooperation of students during practical hours at a distanced faculty exists, as well as the commercialization of this kind of software.

PUBLICATIONS

Gregor Edelbaher, Karel Jezernik, “Brezsenzorska regulacija asinhronskega motorja za nizke hitrosti,” Electrotechnical Review, Vol. 70, No. 5, pp. 261-266, 2003.

Riko Šafarič, Smiljan Šinjur, Borut Žalik, Rob M. Parkin, “Control of robot arm with virtual environment via the internet,” Proc. I.E.E.E., Vol. 91, No. 3, pp. 422-429, 2003.

Suzana Uran, Riko Šafarič, “Motion of flexible object on pneumatic active surface device,” International conference on Mechatronics, pp. 569-574, 2003.

Gregor Edelbaher, Evgen Urlep, Milan Čurkovič, Valentin Kranjec, “Low speed performance improvement in sensorless drive using measured stator voltages of PWM voltage source inverter,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 542-547.

Aleš Hace, Karel Jezernik, “The open CNC controller for a cutting machine,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1231-1236.

Darko Hercog, Milan Čurkovič, Gregor Edelbaher, EvgenUrlep, “Programming of the DSP2 board with the Matlab/Simulink,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 709-713.

Karel Jezernik, Gregor Edelbaher, “Sensorless torque VSS control of EV,” The 29th Annual Conference of the IEEE Industrial Electronics Society, Roanoke, Virginia, USA, Nov. 2003, pp. 902-907.

Karel Jezernik, Gregor Edelbaher, “Sliding mode speed observer of induction motor,” The 29th Annual Conference of the IEEE Industrial Electronics Society, Roanoke, Virginia, USA, Nov. 2003, pp. 77-82. Industrial Robotics Laboratory RO - 13

Karel Jezernik, Gregor Edelbaher, “Speed sensorless torque and flux control of induction motor,” 2003 IEEE International Symposium on Industrial Electronics, Rio de Janeiro, Brasil, Jun. 2003.

Karel Jezernik, Gregor Edelbaher, Miran Rodič, “Sensorless control of induction motor based on estimation of an electromotive force,” Proceedings of the IEMDC 2003 IEEE International Electric Machines and Drives Conference, Madison, Wisconsin, USA, Jun. 2003, pp. 631-637.

Karel Jezernik, Gregor Edelbaher, Miran Rodič, “Speed sensorless control of an induction motor using the extended EMF estimation,” 10th European Conference on Power Electronics and Applications, Toulouse, France, Sep. 2003, pp. P.1-P.10.

Karel Jezernik, Miran Rodič, Gregor Edelbaher, Alenka Hren, “42V tehnologija v avtomobilski industriji - sedanjost in prihodnost,” Inovativna avtomobilska tehnologija, 6. konferenca IAT'03, Koper/Portorož, Slovenia, 24.-25. Apr. 2003, pp. 119-126.

Nenad Muškinja, Boris Tovornik, Martin Terbuc, “Use of TCP/IP protocol in industrial environment,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 896-900.

Rok Ostrovršnik, Aleš Hace, Martin Terbuc, “Use of open source software for hard real-time experiments,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1243-1246.

Janez Pogorelc, “Tekmovanja kot način izobraževanja,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 545-548.

Aleš Polič, Aleš Hace, Karel Jezernik, “Matrix based logic controller,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 370-374.

Aleš Polič, Aleš Hace, Karel Jezernik, “Modular matrix based logic controller,” Region 8 Eurocon 2003: proceedings - CDROM version.

Aleš Polič, Aleš Hace, Karel Jezernik, “System specification, performance analysis and control implementation using matrix-based approach,” 12th International Workshop on Robotics in Alpe-Adria-Danube Region, Cassino, Italy, May 2003.

Miran Rodič, Karel Jezernik, “An approach to the dynamic emulation of mechanical loads,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 489-494. RO - 14 Industrial Robotics Laboratory

Miran Rodič, Karel Jezernik, “Induction motor control using torque and rotor flux oriented presentation,” Region 8 Eurocon 2003: proceedings - CDROM version..

Miran Rodič, Karel Jezernik, Gregor Edelbaher, “An analysis of induction motor speed sensorless control using the extended EMF estimation,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 548-553.

Riko Šafarič, Igor Hedrih, Rok Klobučar, Boštjan Šorgo, “Remote controlled robot arm,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1202-1207.

Riko Šafarič, Boštjan Šorgo, “Control of mobile robot with virtual environment via Internet,” International conference on Mechatronics, 2003, pp. 537-542.

Martin Terbuc, Karel Jezernik, “Informatics skills and education,” Technical creativity in school's curricula with the form of project learning "From idea to the product" - from the kindergarten to the technical faculty: proceedings: 1st international science symposium, Portorož, Slovenia, Apr. 2003, pp. 113-116.

Suzana Uran, Miro Milanovič, “State controller for buck converter,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 381-385.

PRESENTATIONS BY THE LABORATORY MEMBERS

Janez Pogorelc: “Winter vacation course,” winter vacation course of automation and robotics: satelite navigation, robotics, mobile robots, intelligent house, Maribor, Slovenia, Feb. 17, 2003.

Suzana Uran: “Video conference,” "Teaching control with Matlab" for students of Fachhochschule Technikum Kaerten, Carintia Tech Institute, Villach, Austria, Maribor, Slovenia, May 9, 2003.

Janez Pogorelc: “4th national student competition in mobile robotics, 3rd national high school competition in mobile robotics,” organization and realization of national competition in mobile robotics, Maribor, Slovenia, May 15, 2003.

Dejan Kos, Evgen Urlep, Milan Čurkovič, Miran Rodič, Gregor Edelbaher: “Technology transfer day,” use of DSP2 card for control of induction motors, power converters; porting to Matlab/Simulink; advanced tools and procedures for design and testing of servodrives' control algorithms, Maribor, Slovenia, May 27, 2003. Industrial Robotics Laboratory RO - 15

Suzana Uran, Janez Pogorelc: “Create - build your own robot,” course in robotics at high school, Maribor, Slovenia, Sept. 10, 2003.

Martin Terbuc, Janez Pogorelc: “Natural science and technics day,” natural science and technics day for students of 3rd year of high school. Among others: virtual instruments, mobile robots, teleoperation, 200 participants, Maribor, Slovenia, Sept. 19, 2003.

Andreja Rojko, Suzana Uran: “Course "Introduction to Matlab/Simulink",” seminar for students at Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia, Sept. 29, 2003.

Martin Terbuc: “Open source operating system GNU/Linux,” lecture about INES project results at Modern Electronics Ljubljanski sejem, Ljubljana, Slovenia, Oct. 8, 2003.

Miran Rodič: “Servodrives as actuators,” lecture in the frame of seminar "Elements of computer automation systems", Ljubljana, Slovenia, Oct. 14, 2003.

Martin Terbuc: “Usage of Linux in embedded systems,” lecture on 2nd international festival IT Linux festival KIBLiX, Maribor, Slovenia, Nov. 13, 2003.

Karel Jezernik, Dejan Kos, Gregor Edelbaher, Miran Rodič: Basics of induction motors control,” one day seminar for participants from industry, Maribor, Slovenia, Dec. 2, 2003.

Suzana Uran: “Introduction to Matlab/Simulink and its application,” continuous professional training seminar for high school teachers, Maribor, Slovenia, Dec. 5, 2003.

Janez Pogorelc, Martin Terbuc: “Natural science and technics day,” natural science and technics day for high school students. Among others: satellite navigation, mobile robots, teleoperation, 80 participants, Maribor, Slovenia, Dec. 19, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Karel Jezernik: Member of international programme board, international conference, 7th International Conference on Intelligent Engineering Systems, Assiut-Luxor, Egypt, Mar. 4–6, 2003.

Prof. Dr. Karel Jezernik: Member of steering committee, international workshop, 12th International Workshop on Robotics in Alpe-Adria-Danube Region, Cassino, Italy, May 7–10, 2003. RO - 16 Industrial Robotics Laboratory

Prof. Dr. Karel Jezernik: Reviewer, international workshop, 12th International Workshop on Robotics in Alpe-Adria-Danube Region, Cassino, Italy, May 7–10, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international symposium, 2003 IEEE International Symposium on Industrial Electronics, Rio de Janeiro, Brazil, June 9–12, 2003.

Prof. Dr. Karel Jezernik: Member of international programme board, conference, IEEE Conference on Control Applications, Istanbul, Turkey, June 23–25, 2003.

Dr. Miran Rodič, Reviewer, conference, IEEE Conference on Control Asst. Prof. Dr. Suzana Uran, Applications, Istanbul, Turkey, June 23–25, 2003. Prof. Dr. Karel Jezernik:

Prof. Dr. Karel Jezernik: Reviewer, international symposium, 4th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, Atlanta, United States, Aug. 24–26, 2003.

Prof. Dr. Karel Jezernik, Reviewer, conference, 10th European Conference Dr. Miran Rodič: on Power Electronics and Applications, Toulouse, France, Sept. 2–4, 2003.

Prof. Dr. Karel Jezernik: Member of international programme board, conference, Triennial Conference on Applied Automatic Systems, Ohrid, The Former Yugoslav Republic Macedonia, Sept. 18–20, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international conference, The International Conference on Computer as a Tool, Ljubljana, Slovenia, Sept. 22–24, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international conference, The 15th International Conference on Electrical Drives and Power Electronics, Podbanske, Slovakia, Sept. 24– 26, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international conference, The 29th Annual Conference of the IEEE Industrial Industrial Robotics Laboratory RO - 17

Electronics Society, Roanoke, United States, Nov. 2–6, 2003.

Prof. Dr. Karel Jezernik: Section chair, international conference, The 29th Annual Conference of the IEEE Industrial Electronics Society, Roanoke, United States, Nov. 2–6, 2003.

Prof. Dr. Karel Jezernik: Member of international programme board, international symposium, 12th International Symposium on Power Electronics, Novi Sad, Yugoslavia, Nov. 5–7, 2003.

Prof. Dr. Karel Jezernik: Member of steering committee, international conference, The Fifth IEEE International Conference on Power Electronics and Drive Systems, Singapore, Singapore, Nov. 17–20, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international conference, The Fifth IEEE International Conference on Power Electronics and Drive Systems, Singapore, Singapore, Nov. 17–20, 2003.

Prof. Dr. Karel Jezernik: Reviewer, international conference, IEEE Conference on Decision and Control, Maui, United States, Dec. 9–12, 2003.

Prof. Dr. Karel Jezernik: Chairman, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Jože Korelič, Organising committee member, international Jože Harnik, conference, IEEE International Conference on Dr. Aleš Hace, Industrial Technology, Maribor, Slovenia, Dec. 10– Dr. Miran Rodič, 12, 2003. Dr. Andreja Rojko, Asst. Prof. Dr. Martin Terbuc, Assoc. Prof. Dr. Riko Šafarič, Janez Pogorelc, MSc:

Asst. Prof. Dr. Martin Terbuc, Reviewer, international conference, IEEE Dr. Andreja Rojko, International Conference on Industrial Technology, RO - 18 Industrial Robotics Laboratory

Assoc. Prof. Dr. Riko Šafarič, Maribor, Slovenia, Dec. 10–12, 2003. Prof. Dr. Karel Jezernik, Dr. Aleš Hace, Dr. Miran Rodič:

Assoc. Prof. Dr. Riko Šafarič, Section chair, Special session organizer, session Asst. Prof. Dr. Martin Terbuc: chair, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Janez Pogorelc, MSc, Automation in Industry and Commerce, conference, Asst. Prof. Dr. Martin Terbuc, organisation and implementation, Maribor, Dr. Aleš Hace: Slovenia, Apr. 10–11, 2003.

Prof. Dr. Karel Jezernik, ICIT'03 - IEEE International Conference on Jože Harnik, Industrial Technology, international conference, Asst. Prof. Dr. Martin Terbuc, organisation and implementation, Maribor, Janez Pogorelc, MSc, Slovenia, Dec. 10–12, 2003. Jože Korelič, Assoc. Prof. Dr. Riko Šafarič, Dr. Miran Rodič, Dr. Aleš Hace, Dr. Andreja Rojko:

Prof. Dr. Karel Jezernik: Reviewer for IEEE-ASME Transactions on Mechatronics.

Prof. Dr. Karel Jezernik: Reviewer for IEEE Transactions on Power Electronics.

Prof. Dr. Karel Jezernik: Reviewer for Journal of Robotic Systems.

Prof. Dr. Karel Jezernik: Reviewer for IEEE Transactions on Industrial Electronics.

Assoc. Prof. Dr. Riko Šafarič: Reviewer for Proceedings of the IEEE.

Assoc. Prof. Dr. Riko Šafarič: Reviewer for Journal of Systems and Control Engineering - Part I.

Prof. Dr. Karel Jezernik: Reviewer for International Journal of Control. Industrial Robotics Laboratory RO - 19

Prof. Dr. Karel Jezernik: Reviewer for IEE Proceedings - Electric Power Applications.

Prof. Dr. Karel Jezernik: Reviewer for ASME Journal of Dynamic Systems, Measurement, and Control.

Prof. Dr. Karel Jezernik: Reviewer for A Journal of IFAC.

Asst. Prof. Dr. Suzana Uran: Reviewer for Transactions of the Institute of Measurement and Control.

VISITS TO OTHER INSTITUTIONS

Dr. Miran Rodič: Visit to laboratories and research project introduction, visit, Madisom, United States, June 5, 2003.

GUESTS AND VISITORS

Manfred Morari Visit and lecture: Control of hybrid systems. Lecture (Swiss Federal Institute of Technology, was broadcasting on Internet, Sept. 24–26, 2003. Zurich, Switzerland):

Corneliu Radulescu CEEPUS RO-0124-03/04, visit, Dec. 3–13, 2003. (Politehnica University of Timisoara, Timisoara, Romania):

Sergey Ryvkin Participation at conference ICIT'03, keynote lecture (Russian Academy of Sciences, "Flex Mechanics Digital Control Design", exchange Moscow, Russian Federation): of experiences about variable structure systems, seminar participation, Dec. 9–13, 2003.

Peter Magyar Formal call, multidisciplinary collaboration on (D-Tech GmbH, Bielefeld, Germany): conference ICIT'03, formal call, Dec. 10–12, 2003.

Kouhei Ohnishi Participation at conference ICIT'03, scientific (Keio University, Yokohama, Japan): collaboration and agreement about organization of international conferences, Dec. 10–12, 2003. RO - 20 Kinematics and Simulations Laboratory

KINEMATICS AND SIMULATIONS LABORATORY

Head: Assoc. Prof. Dr. Peter Cafuta Phone: +386 2 220 73 40 E-mail: [email protected]

PUBLICATIONS

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, Aleksandar M. Stanković, “New IM torque control with implicit rotor field tracking,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 512-517.

Amor Chowdhury, Marjan Golob, Peter Cafuta, Rajko Svečko, “Robust controller design for position control of the metal ball in magnetic field,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1058- 1063.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Modeling, simulation and experimental verification of IM torque control,” Proceedings of the IASTED International conference on modelling, simulation and optimization, Banff, Canada, Jul. 2003, pp. 82-87.

Bojan Grčar, Peter Cafuta, Gorazd Štumberger, “Torque control of an induction machine based on dynamic equilibrium,” 13. Steirisches Seminar über Regelungstechnik und Prozeßautomatisierung, Schloß Retzhof, Austria, Sep. 2003, pp. 60-79.

PRESENTATIONS BY THE LABORATORY MEMBERS

Boris Curk, Peter Cafuta: “Winter vacation course,” winter vacation course of automation and robotics: satellite navigation, robotics, mobile robots, intelligent house, Maribor, Slovenia, Feb. 17, 2003.

Peter Cafuta: “Torque Control of an Induction Machine Based on Dynamic Equilibrium,” invited lecture on North eastern Univ, Boston, United States, Apr. 25, 2003. Kinematics and Simulations Laboratory RO - 21

Boris Curk: “Course "Introduction to Matlab/Simulink",” seminar for students at Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia, Sept. 29, 2003.

Boris Curk: “Introduction to Matlab/Simulink and its application,” continuous professional training seminar for high school teachers, Maribor, Slovenia, Dec. 5, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Asst. Prof. Dr. Boris Curk: Reviewer, conference, IEEE Conference on Control Applications, Istanbul, Turkey, June 23–25, 2003.

Asst. Prof. Dr. Boris Curk: Organising committee member, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10– 12, 2003.

Assoc. Prof. Dr. Peter Cafuta, Reviewer, international conference, IEEE Asst. Prof. Dr. Boris Curk: International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Asst. Prof. Dr. Boris Curk: ICIT'03 - IEEE International Conference on Industrial Technology, international conference, organisation and implementation, Maribor, Slovenia, Dec. 10–12, 2003.

VISITS TO OTHER INSTITUTIONS

Assoc. Prof. Dr. Peter Cafuta, Development of the VSI Control, formal call, Prof. Dr. Bojan Grčar: Madisom, United States, Apr. 30, 2003.

Assoc. Prof. Dr. Peter Cafuta, Torque control of an induction machine, visit, Linz, Prof. Dr. Bojan Grčar: Austria, Nov. 18, 2003.

Institute of Mathematics and Physics MP – 1

INSTITUTE OF MATHEMATICS AND PHYSICS

Head: Prof. Dr. Vitodrag Kumperščak Phone: +386 2 220 73 90 E-mail: [email protected] URL: http://www.mp.feri.uni-mb.si

Members of the Institute of Mathematics and Physics are participating in research activities at the Faculty for Electrical Engineering and Computer Sciences and at the Institute for Mathematics, Physics, and Mechanics at the University in Ljubljana. Because our research work is not unilaterally organised, we are reporting on individual contributions.

MP – 2 Institute of Mathematics and Physics

Members of the Institute of Mathematics and Physics are organised into one laboratory.

Institute of Mathematics and Physics Head: Prof. Dr. Vitodrag Kumperščak

Applied Mathematics Laboratory Head: Prof. Dr. Vitodrag Kumperščak

Applied Mathematics Laboratory

Head: Prof. Dr. Vitodrag Kumperščak

Employees: Assoc. Prof. Dr. Gorazd Lešnjak; Dr. Andrej Duh; Melita Gorše, BSc; Vladimir Grubelnik, MSc; Milan Kutnjak, MSc; Dr. Marjan Logar; Asst. Prof. Dr Tatjana Petek; Iztok Peterin, MSc; Jasna Petric, BSc; Aleksandra Tepeh, BSc Applied Mathematics Laboratory MP - 3

APPLIED MATHEMATICS LABORATORY

Head: Prof. Dr. Vitodrag Kumperščak Phone: +386 2 220 73 90 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

Z1-3073-0101-01 Strukturne in algebraične lastnosti razredov grafov (Structural and algebraic properties of graph classes) Leader: Asst. Prof. Dr. Boštjan Brešar Financed by: Ministry of Science and Technology of the Republic of Slovenia

Graph classes are studied defined either by metric properties, by certain elimination procedures, or as subgraphs of product graphs. The main focus is given to research of these graphs structures, as well as to the existence of subgraphs that are invariant under automorphisms or related maps.

Completed research projects 2003

Basic research project

P0-0508-0101 (B) Algebraične metode v teoriji operatorjev (Algebraic methods in operator theory) Leader: Tomaž Omladič (Institute for Mathematics, Physics and Mechanics, University of Ljubljana) Participants: Assoc. Prof. Dr. Gorazd Lešnjak Financed by: Ministry of Science and Technology of the Republic of Slovenia MP - 4 Applied Mathematics Laboratory

Duration: Jan. 1999 to Dec. 2003

In this project we plan to study operators defined on real or complex Banach and Hilbert spaces and on Banach lattices as well as linear operators on finite dimensional vector spaces (matrices) over general fields.

P0-0510-0101 (B) Teorija operatorjev (Operator theory) Leader: Peter Šemrl (Institute for Mathematics, Physics and Mechanics, University of Ljubljana) Participants: Asst. Prof. Dr. Tatjana Petek Financed by: Ministry of Science and Technology of the Republic of Slovenia

Duration: Jan. 1999 to Dec. 2003

This project is devoted to the study of Jordan homomorphisms, spectral properties (invertibility, spectral radius, quasinilpotents) preservers and comutativity preserving maps. We shall research the related problem of characterizing Lie homomorphisms.

PUBLICATIONS

Boštjan Brešar, “Arboreal structure and regular graphs of median-like classes,” Discuss. Math., Graph Theory, Vol. 23, No. 2, pp. 215-225, 2003.

Boštjan Brešar, “Intersection graphs of maximal hypercubes,” Eur. j. comb., Vol. 24, No. 2, pp. 195-209, 2003.

Boštjan Brešar, Wilfried Imrich, Sandi Klavžar, “Fast recognition algorithms for classes of partial cubes,” Discrete appl. math., Vol. 131, No. 1, pp. 51-61, 2003.

Boštjan Brešar, Wilfried Imrich, Sandi Klavžar, “Tree-like isometric subgraphs of hypercubes,” Discuss. Math., Graph Theory, Vol. 23, No. 2, pp. 227-240, 2003.

Boštjan Brešar, Sandi Klavžar, Riste Škrekovski, “The cube polynomial and its derivatives: the case of median graphs,” Electron. j. comb., Vol. 10, No. 1, R3 (11 pp.), 2003.

Boštjan Brešar, Sandi Klavžar, Riste Škrekovski, “Quasi-median graphs, their generalizations, and tree-like equalities,” Eur. j. comb., Vol. 24, No. 5, pp. 557-572, 2003. Applied Mathematics Laboratory MP - 5

Boštjan Brešar, Blaž Zmazek, “On the independence graph of a graph,” Discrete math., Vol. 272, No. 2-3, pp. 263-268, 2003.

Samo Fošnarič, Marko Marhl, Vladimir Grubelnik, “Modeliranje kot usmerjena didaktična dejavnost pri pouku,” Pedagoš. obz., Vol. 18, No. 1, pp. 35-45, 2003.

Marjan Logar, Robert Jeraj, Bogdan Glumac, “The effect of pitch, burnup, and absorbers on a trigaspent-fuel pool criticality safety,” Nucl. technol., Vol. 141, No. 2, pp. 211-219, 2003.

Tatjana Petek, Humberto Sarria, “Spectrum and commutativity preserving mappings on H2,” Linear algebra appl., 364, pp. 317-319, 2003.

Marko Marhl, Vladimir Grubelnik, “Modeliranje pri pouku naravoslovja,” Didaktični in metodični vidiki prenove in razvoja izobraževanja: knjiga referatov z 2. mednarodnega znanstvenega posveta, Maribor, Slovenia, Nov. 2001, pp. 381-387.

Vladimir Grubelnik, Samo Fošnarič, Marko Marhl, “Concepts of system thinking and modelling,” Društvo i tehnologija 2003, The 10th International Scientific Conference, Opatija, Croatia, Jun. 2003, pp. 36-40.

PRESENTATIONS BY THE LABORATORY MEMBERS

Milan Kutnjak: “Course "Introduction to Matlab/Simulink",” seminar for students at Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia, Sept. 29, 2003.

Milan Kutnjak: “Introduction to Matlab/Simulink and its application,” continuous professional training seminar for high school teachers, Maribor, Slovenia, Dec. 5, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Boštjan Brešar: Reviewer for Discussiones Math. Graph Theory, referee of scietific articles.

Boštjan Brešar: Reviewer for Discrete Mathematics, referee of scientific articles.

Assoc. Prof. Dr. Gorazd Lešnjak: Reviewer for Linear and Multilinear Algebra, referee of a scientific article.

Asst. Prof. Dr. Tatjana Petek: Reviewer for Linear Algebra and Applications, MP - 6 Applied Mathematics Laboratory

referee of scientific articles.

Asst. Prof. Dr. Tatjana Petek: Reviewer for Linear and Multilinear Algebra.

GUESTS AND VISITORS

Lajos Molnar Research work, Dec. 26–30, 2003. (KLTE Debrecen, Institute of Mathematics, Debrecen, Hungary):

Institute of Computer Science CS – 1

INSTITUTE OF COMPUTER SCIENCE

Head: Prof. Dr. Viljem Žumer Phone: ++386 2 220 74 50 E-mail: [email protected] URL: http://www.cs.feri.uni-mb.si/rac/

The Institute of Computer Science has 45 employees, including 5 full professors, 1 associate professor, 4 assistant professors, assistants, researchers, and technical staff. The main activities of the Institute of Computer Science are teaching graduate and postgraduate courses and research work. Research work currently being performed includes the national programme group Computer Systems, Methodologies and Cybernetic projects financed by the Ministry of Education, Science and Sport Republic of Slovenia, 2 fundamental research projects, 25 international projects, 11 applied research projects, and 3 industrial projects.

During the past year, the institute has published more than 100 papers, presented a great deal of research work, and in addition, organised meetings, conferences, and visits to other institutions. The main research areas of the institute are: computer graphics, artificial intelligence, computer animation, multimedia, programming languages, computer architecture, internet computing, medical informatics, software engineering, signal and image processing, and system software.

CS – 2 Institute of Computer Science

Members of the institute are divided into six laboratories and seven centres of technology.

Institute of Computer Science Head: Prof. Dr. Viljem Žumer

Computer Graphics and Computer Architecture Artificial Intelligence and Languages Laboratory Laboratory Head: Head: Prof. Dr. Nikola Guid Prof. Dr. Viljem Žumer

System Design System Software Laboratory Laboratory Head: Head: Prof. Dr. Peter Kokol Prof. Dr. Damjan Zazula

Heterogeneous Computer Geometric Modelling and Systems Laboratory Multimedia Algorithms Laboratory Head: Asst. Prof. Dr. Milan Ojsteršek Head: Prof. Dr. Borut Žalik

Institute of Computer Science CS – 3

Computer Graphics and Artificial Intelligence Laboratory

Head: Prof. Dr. Nikola Guid

Employees: Simon Kolmanič, MSc; Damjan Strnad, MSc; Bogdan Lipuš, MSc; Karno Bozi

Centre for Computer Animation and Multimedia Head: Prof. Dr. Niko Guid

Computer Architecture and Languages Laboratory

Head: Prof. Dr. Viljem Žumer

Employees: Assoc. Prof. Dr. Marjan Mernik; Asst. Prof. Dr. Janez Brest; Robert Krušec; Matej Črepinšek; Tomaž Kosar; Sašo Greiner; Damijan Rebernak; Borko Bošković; Simon Tutek

Centre for Programming Languages Head: Prof. Dr. Viljem Žumer

System Design Laboratory

Head: Prof. Dr. Peter Kokol

Employees: Asst. Prof. Dr. Milan Zorman; Dr. Mitja Lenič, MSc; Petra Povalej; Gregor Štiglic; Matej Mertik

Centre for Medical Informatics Head: Prof. Dr. Peter Kokol

System Software Laboratory

Head: Prof. Dr. Damjan Zazula

Employees: Dr. Danilo Korže; Dr. Andrej Šoštarič; Dr. Dean Korošec; Asst. Prof. Dr. Božidar Potočnik; Boris Cigale, MSc; Aleš Holobar; Matjaž Divjak MSc; Dušan Heric; Jurij Munda; Daniel Bernard; Smiljan Šinjur

Centre for Interactive Network Applications CS – 4 Institute of Computer Science

Head: Prof. Dr. Damjan Zazula Centre for Biomedical Signal and Image Processing Head: Prof. Dr. Damjan Zazula

Heterogeneous Computer Systems Laboratory

Head: Asst. Prof. Dr. Milan Ojsteršek

Employees: Aleksander Kvas, MSc; Ervin Schaffranietz, MSc; Branko Horvat, MSc; ; Borut Gorenjak; Albin Bregant; Bojan Letnik

Centre for Heterogeneous Processing Head: Asst. Prof. Dr. Milan Ojsteršek

Laboratory for Geometric Modelling and Multimedia Algorithms

Head: Assoc. Prof. Dr. Borut Žalik

Employees: Dr. David Podgorelec; Matej Gomboši, MSc; Dr. Sebastian Krivograd; Gregor Klanjšek; Mirko Zadravec; Vid Domiter

Centre for Geometric Modelling Head: Assoc. Prof. Dr. Borut Žalik Computer Graphics and Artificial Intelligence Laboratory CS - 5

COMPUTER GRAPHICS AND ARTIFICIAL INTELLIGENCE LABORATORY

Head: Prof. Dr. Nikola Guid Phone: +386 2 220 74 70 E-mail: [email protected]

RESEARCH PROJECTS

Completed research projects 2003

International project

CAD-03 Computer Aided Design Leader: Prof. Dr. Nikola Guid, Matjaž Hmeljak (Universita' di Trieste, Facolta' di Ingegneria) Participants: Simon Kolmanič, MSc; Damjan Strnad, MSc; Annamaria Carminelli Project partners: Universita' di Trieste, Facolta' di Ingegneria Financed by: University of Maribor, Universita' di Trieste, Facolta' di Ingegneria

Duration: May to Nov. 2003

Computer aided design is one of the most important applications of computer graphics algorithms and it represents a contemporary method of present-day industrial design. As such, it is confronted with new requirements for the simplification and improvement of design for objects with the most demanding shapes. The main goal of the project has been to recognize those visualization problems, which have to be solved and to establish bilateral collaboration in the field of research and to investigate the possibility of collaboration in European projects. With that purpose the research results of both groups have been presented in order to find common interests. We will try to transfer the results of our common work into the industry. CS - 6 Computer Graphics and Artificial Intelligence Laboratory

PUBLICATIONS

Simon Kolmanič, Nikola Guid, “A new approach in CAD system for designing shoes,” CIT. J. Comput. Inf. Technol., Vol. 11, No. 4, pp. 319-326, 2003.

Simon Kolmanič, Nikola Guid, “A fast algorithm for reconstructing and flattening digitised surfaces,” Stroj. vestn., Vol. 49, No. 4, pp. 230-241, 2003.

Željka Mihajlović, Leo Budin, Nikola Guid, “Reconstruction of gradient in volume rendering,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 282-286.

Simon Kolmanič, Nikola Guid, “Rekonstrukcija krivulj prečnih prerezov s pomočjo evklidskega minimalnega vpetega drevesa,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 441-444.

PRESENTATIONS BY THE LABORATORY MEMBERS

Simon Kolmanič: “Some methods used in computer animation,” lecture, presented at University of Trieste, Trieste, Italy, May 15, 2003.

Simon Kolmanič, Karno Bozi: “Presentation of animated videoclip The world is wonderful,” presentation of animated videoclip on 9th international festival of computer arts, Maribor, Slovenia, July 5, 2003.

Damjan Strnad: “Modelling trees with iterated function systems,” lecture, presented at the DEEI Department of the Engineering faculty of the University of Trieste, Trieste, Italy, Oct. 21, 2003.

Nikola Guid: “Illumination Models,” lecture presented at the postgraduate study of Computer Science, Zagreb, Croatia, Nov. 28, 2003.

Nikola Guid: “Computer graphics. Curves and surfaces in CAGD.,” lecture presented at the postgraduate study of Computer Science, Zagreb, Croatia, Dec. 19, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Nikola Guid: Programme committee member, international conference, Information Society 2002, Ljubljana, Slovenia, Nov. 13–17, 2003. Computer Graphics and Artificial Intelligence Laboratory CS - 7

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Nikola Guid, Introductive discussions with potential partners Simon Kolmanič, MSc, were held during our visit, where the research fields Damjan Strnad, MSc: of both sides were presented and potential common interests were investigated, formal call, Trieste, Italy, May 15–16, 2003.

Prof. Dr. Nikola Guid, Introductive discussions with potential partners Simon Kolmanič, MSc, were held during our visit, where the research fields Damjan Strnad, MSc: of both sides were presented and potential common interests were investigated, formal call, Trieste, Italy, Oct. 20–21, 2003.

Prof. Dr. Nikola Guid: Visit of the University of Padova and searching for potential collaborative partners for European research projects, formal call, Padova, Italy, Oct. 30–31, 2003.

GUESTS AND VISITORS

Matjaž Hmeljak Lecture entitled Programming and art, formal call, (Universita' di Trieste, Facolta' di June 1–3, 2003. Ingegneria, Trieste, Italy):

CS - 8 Computer Architecture and Languages Laboratory

COMPUTER ARCHITECTURE AND LANGUAGES LABORATORY

Head: Prof. Dr. Viljem Žumer Phone: +386 2 220 74 50 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

L2-3302-0796 Informacijski sistem za projektno vodenje proizvodnje v strojegradnji (Information system for the project oriented production of machinery and working tools) Leader: Asst. Prof. Dr. Janez Brest Participants: Matej Črepinšek, Robert Krušec, Sašo Greiner Financed by: Lestro Engineering, d. o. o., Ministry of Education, Science and Sport of the Republic of Slovenia

This project oriented production model in the field of woodworking machines is used for rapid production adaptation to market demands. To minimize the development time of the product, it takes the efforts of all participants, who have to be able to contribute to the product's development. Furthermore, the participants are required to manage all the modifications and adaptations. The main goal of this research is the design and implementation of an information system for the development, planning and control of the production process for machinery and working tools. Computer Architecture and Languages Laboratory CS - 9

Industrial projects

PONUPP Programska oprema za nadzor in upravljanje procesa proizvodnje (Software for control and management of production process) Leader: Prof. Dr. Viljem Žumer Participants: Asst. Prof. Dr. Janez Brest, Damijan Rebernak, Borko Boškovič, Simon Tutek Financed by: Lestro Ledinek, d. o. o.

The main objective of this project is the implementation and upgrading of the information system which is currently used in woodwork manufacturing. The project has several phases in which the analysis of currently used information systems is studied, after which the organization of a database is made, and the information system is implemented. One of the project's aims is studying the complexity of the production process and its implementation.

International projects

SLO-P-11/01-04 Automatic Generation of Language-Based Tools Leader: Prof. Dr. Viljem Žumer, Pedro Henriques (University of Minho) Participants: Assoc. Prof. Dr. Marjan Mernik, Robert Krušec, Matej Črepinšek, Maria Joao Pereira Varanda, Tomaž Kosar Project partners: University of Minho Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Instituto de Cooperacao Cientifica e Tecnologia Internacional

The main aim of the project is to extend language definitions in such a manner that many other language-based tools can be generated and to automatically generate some of them. One of the language-based tools, which we would like to be automatically generated is an algorithm animator and program visualizer. Currently, algorithm animators and program visualizers are strongly language and algorithm oriented. In this project we would like to show that algorithm animators and program visualizators could also be language independent and automatically generated from extended language definitions.

BI-US/03-04/5 GenParse: Generating a Parser from Examples Leader: Assoc. Prof. Dr. Marjan Mernik, Barratt Bryant (University of Alabama at Birmingham) CS - 10 Computer Architecture and Languages Laboratory

Participants: Prof. Dr. Viljem Žumer, Matej Črepinšek, Asst. Prof. Dr. Janez Brest, Tomaž Kosar, Damijan Rebernak, Alan Sprague Project partners: University of Alabama at Birmingham Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

One of the open problems in the area of domain-specific languages is how to make domain specific language development easier for domain experts not versed in programming language design. Possible approaches are to build a domain-specific language from parametrized building blocks or by language (grammar) induction. This project suggests an evolutionary approach to grammar induction. Grammar-specific genetic operators for crossover and mutation are proposed to achieve this task. Suitability of the approach is shown by small experiments where underlying grammars are successfully inferred and parsers are generated from examples. In the project we would like also to further explore applicable ideas for inferring real world grammars. Machine learning of grammars finds many applications in syntactic parttern recognition, computational biology, natural language acquisition, etc. In the proposed project a new application of grammatical inference is suggested - the development of domain specific languages.

BI-BA/03-05-002 Implementation of Domain-Specific Languages: Evaluation of Approaches Leader: Assoc. Prof. Dr. Marjan Mernik, Gabriel Baum (Universidad Nacional de La Plata) Participants: Prof. Dr. Viljem Žumer, Tomaž Kosar, Damijan Rebernak, Matej Črepinšek, Asst. Prof. Dr. Janez Brest, Pablo E. Martinez Lopez, Mariana Baez, Diego Yanivello Project partners: Universidad Nacional de La Plata Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Republic of Argentina

A domain-specific language (DSL) programming language for solving problems in a particular domain and provides built-in abstractions and notations for that domain, is by no means an exception. Domain-specific languages are usually small, more declarative than imperative, and more attractive than general-purpose languages for a variety of applications because of easier programming, systematic reuse and easier verification. However, the benefits of DSLs are not for free. Without appropriate methodology and tools, the up-front investment for DSL support can exceed the savings obtained by using a DSL for application development. In this project various DSL implementation approaches are evaluated and compared with the aim of finding the advantages and disadvantages of particular approaches. Computer Architecture and Languages Laboratory CS - 11

PUBLICATIONS

Janez Brest, Janez Žerovnik, Viljem Žumer, “Algoritem za nesimetrični problem trgovskega potnika,” Electrotechnical Review, Vol. 70, No. 1/2, pp. 40-45, 2003.

Bogdan Filipič, Iztok Fister, Marjan Mernik, “Evolutionary optimization of markers in clothes production,” Informatica (Ljublj.), Vol. 27, No. 4, pp. 411-415, 2003.

Marjan Mernik, Viljem Žumer, “An educational tool for teaching compiler construction,” IEEE trans. ed., Vol. 46, No. 1, pp. 61-68, 2003.

Borko Bošković, Damijan Rebernak, Sašo Greiner, Janez Brest, Viljem Žumer, “Nadzorovanje virov računalniškega sistema v operacijskem sistemu Linux,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 397-400.

Janez Brest, Silvo Roškar, Borko Bošković, Damijan Rebernak, Sašo Greiner, Robert Krušec, Viljem Žumer, “Informacijski sistem v proizvodnem procesu,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 365-368.

Janez Brest, Viljem Žumer, “A heuristic algorithm for the static scheduling on multiprocessors,” 21st IASTED International Multi-Conference Applied Informatics, Innsbruck, Austria, 2003, pp. 707-712.

Matej Črepinšek, Marjan Mernik, Goran Gerlič, Tomaž Kosar, Viljem Žumer, “Učenje kontekstno neodvisnih gramatik z izboljšano gradnjo začetne populacije,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 429-432.

Matej Črepinšek, Marjan Mernik, Goran Gerlič, Tomaž Kosar, Viljem Žumer, “Uporaba genetskega programiranja pri učenju kontekstno prostih gramatik,” Inteligentni in računalniški sistemi, Kompleksni sistemiv e-poslovanju: zbornik A 6. mednarodne multi-konference Informacijska družba IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 29-32.

Iztok Fister, Bogdan Filipič, Marjan Mernik, “Reševanje lokalnega problema optimizacije krojnih slik z evolucijskimi algoritmi,” Inteligentni in računalniški sistemi, Kompleksni sistemiv e- poslovanju: zbornik A 6. mednarodne multi-konference Informacijska družba IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 37-40.

Sašo Greiner, Borko Bošković, Janez Brest, Viljem Žumer, “Security issues in information systems based on open-source technologies,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 449-453. CS - 12 Computer Architecture and Languages Laboratory

Sašo Greiner, Janez Brest, Viljem Žumer, “Grozdna arhitektura za porazdeljeno izvajanje programskega bremena,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 417-420.

Sašo Greiner, Damijan Rebernak, Borko Bošković, Janez Brest, Viljem Žumer, “Web information system based on open source technologies,” ITI 2003: proceedings of the 25th International Conference on Information Technology Interfaces, Cavtat, Croatia, Jun. 2003, pp. 137-142.

Sašo Greiner, Simon Tutek, Janez Brest, Viljem Žumer, “Razvojna paradigma MVC v spletnih aplikacijah,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 393-396.

Pedro Rangel Henriques, Tomaž Kosar, Marjan Mernik, Maria Joao Varando Pereira, Viljem Žumer, “Grammatical approach to problem solving,” ITI 2003: proceedings of the 25th International Conference on Information Technology Interfaces, Cavtat, Croatia, Jun. 2003, pp. 645-650.

Tomaž Kosar, Marjan Mernik, Matej Črepinšek, Viljem Žumer, “Povezovanje domensko specifičnih vizualnih jezikov s COTS načrtovalskimi orodji,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 405-408.

Marjan Mernik, Matej Črepinšek, Tomaž Kosar, Viljem Žumer, “Grammar-based systems: definition and examples,” Zbornik B 6. mednarodne multi-konference Informacijska družba IS 2003, Oct. 2003, B, pp. 280-287.

Marjan Mernik, Goran Gerlič, Viljem Žumer, Barrett R. Bryant, “Can a parser be generated from examples?,” Applied computing 2003: proceedings of the 2003 ACM symposium on applied computing, Melbourne, Florida, USA, Mar. 2003, pp. 1063-1067.

Damijan Rebernak, Mitja Lenič, Peter Kokol, Viljem Žumer, “Finding boundary subjects for medical decision support with support vector machines,” Sixteenth IEEE symposium on computer-based medical systems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 385- 390.

Andrej Taranenko, Aleksander Vesel, Marjan Mernik, “Barvanje razpolovljenih kock z evolucijskim algoritmom,” Inteligentni in računalniški sistemi, Kompleksni sistemi v e- poslovanju: zbornik A 6. mednarodne multi-konference Informacijska družba IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 143-146. Computer Architecture and Languages Laboratory CS - 13

Danijel Žnuderl, Matej Črepinšek, Marjan Mernik, Viljem Žumer, “GPK: a Java based genetic programming kernel,” ITI 2003: proceedings of the 25th International Conference on Information Technology Interfaces, Cavtat, Croatia, Jun. 2003, pp. 681-686.

PRESENTATIONS BY THE LABORATORY MEMBERS

Marjan Mernik: “GenParse: generating a parser from examples?,” lecture, presented in the context of bilateral project between University of Maribor and University of Minho, Braga, Portugal, May 24, 2003.

Tomaž Kosar: “Grammatical approach to problem solving,” talk given at the Department of Computer Science at the University of Minho, Braga, Portugal, May 30, 2003.

Marjan Mernik: “Learning context-free grammars using an evolutionary approach,” lecture, presented at the Programming languages Reading group, Macquarie University, Sydney, Department of computing, Macquarie, Australia, Aug. 1, 2003.

Janez Brest: “Design of referential repository for the available open source and free software,” project OKO, Portorož, Slovenia, Oct. 29, 2003.

Matej Črepinšek, Marjan Mernik: “Grammar-based systems,” lecture, presented at The UAB, University of Alabama at Birmingham, Department of computer & Information sciences, CIS Seminars, Birmingham, Alabama, United States, Nov. 5, 2003.

Tomaž Kosar: “Developing grammar based systems with compiler generator Lisa,” lecture, given in the context of bilateral project between University of La Plata Argentina and University of Maribor, La Plata, Buenos Aires, Argentina, Nov. 18, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Assoc. Prof. Dr. Marjan Mernik: Reviewer, Programme chair, international conference, Hawaii International Conference on System Sciences, Hawaii, United States, Jan. 6–9, 2003.

Assoc. Prof. Dr. Marjan Mernik: Programme committee member, international conference, Information Society 2002, Ljubljana, Slovenia, Nov. 13–17, 2003.

Assoc. Prof. Dr. Marjan Mernik: Hawaii International Conference on System CS - 14 Computer Architecture and Languages Laboratory

Sciences, international conference, co-Ordinated organisation and implementation, Hawaii, United States, Jan. 6–9, 2003.

Assoc. Prof. Dr. Marjan Mernik: Reviewer for Journal of Computing and Information Technology.

Assoc. Prof. Dr. Marjan Mernik: Reviewer for Science of Computer Programming.

Assoc. Prof. Dr. Marjan Mernik: Reviewer for IEEE Transactions on Education.

VISITS TO OTHER INSTITUTIONS

Tomaž Kosar, Research work on Slovenian-Portuguese project Assoc. Prof. Dr. Marjan Mernik: SLO–P-11/01-04, scientific collaboration, Braga, Portugal, May 24–30, 2003.

Assoc. Prof. Dr. Marjan Mernik: Research work, Macquarie University, Sydney, Avstralija, research work, Sydney, Australia, July 26 to Aug. 18, 2003.

Matej Črepinšek, Research work on Slovenian-USA project BI- Assoc. Prof. Dr. Marjan Mernik: US/03-04/5, scientific collaboration, Birmingham, United States, Oct. 25 to Nov. 8, 2003.

Tomaž Kosar: Research work on project BI-BA/03-05-002, scientific collaboration, Buenos Aires, Argentina, Nov. 15–29, 2003.

GUESTS AND VISITORS

Pedro Henriques, Research work on Slovenian-Portuguese project Maria Joao Pereira Varanda SLO–P-11/01-04, scientific collaboration, Mar. 18– (University of Minho, Braga, Portugal): 21, 2003.

Alan Sprague, Research work on Slovenian-USA project BI- Barratt Bryant US/03-04/5, scientific collaboration, June 8–21, (University of Alabama at Birmingham, 2003. Birmingham, United States): System Design Laboratory CS - 15

SYSTEM DESIGN LABORATORY

Head: Prof. Dr. Peter Kokol Phone: +386 2 220 74 57 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

International projects

ISOQ (SLO-P-10/01- ISOQ - Improvement of Software Quality with the Complexity 04) Metrics Leader: Prof. Dr. Peter Kokol Participants: Dr. Mitja Lenič, Petra Povalej, Asst. Prof. Dr. Milan Zorman Project partners: University of Madeira Reliability is one of the key issues in assuring the quality of software in complex systems. It is very important to economically and consistently assure the appropriate level of software reliability, because more and more activities and systems rely on software. One of the ways to assure software reliability is to use software complexity metrics. The development of software is a complex and complicated process, where we unintentionally make errors in the code. It has been proven that the pattern of making unintentional errors in code is related to measurable quantities of the code, especially those measured with software complexity metrics. For instance, large systems are made of different modules, where each module can be described by its attribute values. It could be very appropriate to predict the number of errors in the code, using these attribute values. Both of our projects deal with researching the use of fractal software complexity metrics in predicting and evaluating the characteristics of software. CS - 16 System Design Laboratory

MERCOS (SLO-ITA MERCOS - Mesuring Reusability by Complexity Similarity 8A/2002-2005) Leader: Prof. Dr. Peter Kokol, Maurizio Pighin (Universita di Udine) Participants: Dr. Mitja Lenič, Petra Povalej, Asst. Prof. Dr. Milan Zorman Project partners: Universita degli studi di Udine, Facolta di Ingegneria Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Reusability and component-based software engineering are two of the hottest topics in software development. It has been shown that software development is a complex and complicated process. A large software system consists of various modules which are sometimes unclearly distinguishable. Each of these modules can be characterized by some design patterns in terms of attribute measurements – it would be quite useful to be able to base reusability engineering on such attributable measurements. On the other hand, one of the fastest growing areas in computer science is software engineering and engineering has always been inherently coupled with measurement. Regarding the complexity of the software development process, it is interesting to note that recently different attempts have been made to use the science of complexity in the measurement area.

ISCoMAA Intelligent Systems Construction by Multiple Autonomous Agents Leader: Prof. Dr. Peter Kokol, Lenka Lhotska (Czech Technical University of Prague) Participants: Asst. Prof. Dr. Milan Zorman, Asst. Prof. Dr. Vili Podgorelec, Dr. Mitja Lenič, Dr. Matej Šprogar Project partners: Czech Technical University of Prague Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

In order to design successful intelligent systems to be used in medical applications, we must design them with an appropriate design methodology. Therein lies another weakness–very few, if any, such methods exist in the world. Therefore the goals of our research are: - to develop successful design methods - to use these methods in designing real-world agent based intelligent medical systems. System Design Laboratory CS - 17

Completed research projects 2003

International project

IMEDA (SLO-US- IMEDA - Intelligent Medical Data Analysis 2002/06) Leader: Prof. Dr. Peter Kokol, Margaret G.E. Peterson (Hospital For Special Surgery, Cornell University) Participants: Petra Povalej, Dr. Mitja Lenič, Asst. Prof. Dr. Milan Zorman Project partners: Hospital For Special Surgery, Cornell University Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Mar. 2002 to Dec. 2003

The numbers and sizes of medical databases (electronic or manual) are increasing enormously. While providing great help for the successful health care process, they also contain much “hidden knowledge”, which is not evident without careful and elaborate analysis. Statistical analysis and various computerised tools can be a great help, but often this is not enough and more patterns can be discovered using less conventional methods like intelligent systems. To be able to design successful intelligent medical systems (IMS), we must design them with appropriate design paradigms, one of them is MetaMet - a two levelled system design approach. Single methods like neural networks, evolutionary algorithms, decision trees and others can be quite successful in intelligent data analysis, but they also have many weaknesses that may be solved with a combination of their methods – a hybrid approach, and with employment of the theories of chaos and complexity. Medical databases are normally distributed over several computers, institutions or even countries, usually using different operating systems or protocols. Therefore, a heterogeneous approach has to be used. The additional advantage of heterogeneous computing is its enlarged computational power, that can be used to effectively execute resource-consuming algorithms.

SQUFOL Software Quality Founded On Design Laws Leader: Prof. Dr. Peter Kokol Participants: Dr. Mitja Lenič, Asst. Prof. Dr. Milan Zorman Project partners: Lucent Technologies Network Systems GmbH, Logic DIS S.A., ZEUS Consulting S.A.-LogicDIS Group, South Bank University, Rila Solutions, The Intelligent Computer Systems Centre, University of The West of England Financed by: European Commision, Information Systems Technology CS - 18 System Design Laboratory

Duration: Oct. 2002 to Sept. 2003

As with systems in management science and economics, software development (the development includes the whole software system life-cycle: from the idea/statement of need to its use and maintenance) has similar system attributes, i.e. as a complex, dynamic, non- linear and adaptive system. Consequently, the aim of the session is to gain a fundamental understanding of the software process and the software product. The proposed approach will use the science of complexity, various system theories, the theories of chaos, fractals and other, traditionally "physically based" methodologies, theories of complex adaptive systems, biologically and evolutionary inspired economic/market theories, intelligent data analysis, data mining which are not yet recognised by software design researchers. Our aim is to significantly improve basic knowledge about and the fitness and quality of the software product, its quality and its development process in short development and introduce well understood software design processes first leading to well understood software and related products of superior quality.

PUBLICATIONS

Maurizio Pighin, Vili Podgorelec, Peter Kokol, “Fault-threshold prediction with linear programming methodologies,” Empirical software engineering, Vol. 8, No. 2, pp. 117-138, 2003.

Petra Povalej, Peter Kokol, Jernej Završnik, “Dve plati uporabe inteligentnih sistemov v medicini,” Uporab. inform. (Ljubl.), Vol. 11, no. 3, pp. 131-137, 2003.

Petra Povalej, Mitja Lenič, Milan Zorman, Peter Kokol, Lenka Lhotska, Rado Pišot, “Machine learning helps physicians in diagnosing of mitral valve prolapse,” Health informatics Europe, 29/10, 8 pp., 2003.

Milan Zorman, Peter Kokol, Mitja Lenič, Petra Povalej, Bruno Stiglic, Dušan Flisar, “Intelligent platform for automatic medical knowledge acquisition: detection and understanding of neural dysfunction,” Sixteenth IEEE symposium on computer-based medicalsystems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 136-141.

Rui Gustavo Crespo, Ana Isabel Cardoso, Peter Kokol, “The [alpha] metric values for random and fully organized programs,” IAFA 2003 proceedings, The first South-East European symposium on Interdisciplinary approaches in fractal analysis, Bucharest, Romania, May 2003, pp. 224-228.

Rui Gustavo Crespo, Ana Isabel Cardoso, Peter Kokol, “Complexity-based metrics for the evaluation of the program organization,” IAFA 2003 proceedings, The first South-East System Design Laboratory CS - 19

European symposium on Interdisciplinary approaches in fractal analysis, Bucharest, Romania, May 2003, pp. 215-218.

Peter Kokol, Eva Feuer, Mitja Lenič, Vili Podgorelec, Ana Isabel Cardoso, Rui Gustavo Crespo, “Reverse bifurcations in software development,” IAFA 2003 proceedings, The first South-East European symposium on Interdisciplinary approaches in fractal analysis, Bucharest, Romania, May 2003, pp. 229-234.

Enis Avdičaušević, Mitja Lenič, Peter Kokol, “Unsupervised learning using multivariate symbolic hybrid,” Proceedings, Sixteenth IEEE symposium on computer-based medical systems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 373-378.

Ana Benedičič Pilih, Vera Pompe-Kirn, Peter Kokol, Petra Povalej, Jože Arzenšek, “Kožni melanom v Sloveniji in potreba po preventivi,” Zbornik predavanj, 2003, pp. 27-37.

Peter Kokol, Milan Zorman, Mitja Lenič, Petra Povalej, Dušanka Mičetić-Turk, “Nursing education with intelligent systems,” 8th International congress in nursing informatics, Rio de Janeiro, Brasil, Jun. 2003.

Mitja Lenič, Petra Povalej, Peter Kokol, “Impact of purity measures on knowledge extraction indecision trees,” Third IEEE International conference on data mining, Melbourne, Florida, USA, Nov. 2003, pp. 106-111.

Mitja Lenič, Petra Povalej, Milan Zorman, Peter Kokol, “Multimetodna gradnja klasifikatorjev,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 409-412.

Mitja Lenič, Petra Povalej, Milan Zorman, Peter Kokol, Enis Avdičaušević, Bruno Stiglic, “Improved medical decision support with multimethod approach,” Sixteenth IEEE symposium on computer-based medical systems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 242- 247.

Mitja Lenič, Petra Povalej, Milan Zorman, Vili Podgorelec, Peter Kokol, Lenka Lhotska, “Multimethod machine learning approach for medical diagnosing,” New solutions for new challenges: conference programme, 2003, pp. 195-198.

Matej Mertik, Peter Kokol, Martin Teboul, “Anhinga - večjezično interaktivno okolje za podatkovno rudarjenje ne-strukturiranih podatkovnih virov,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 353-355. CS - 20 System Design Laboratory

Petra Povalej, Peter Kokol, Mitja Lenič, Milan Zorman, Jernej Završnik, “Determining blood lipids in obese children with decision trees,” 8th International congress in nursing informatics, Rio de Janeiro, Brasil, Jun. 2003.

Petra Povalej, Mitja Lenič, Peter Kokol, “Intelligent systems discovering facts about heart attack patients survival,” Proceedings of the 5th International conference on neural networks and expert systems in medicine and healthcare and 1st International conference on computational intelligence in medicine and healthcare, Sheffield Hallam University, Sheffield, UK, Jul. 2003, pp. 79-84.

Petra Povalej, Mitja Lenič, Milojka Molan Štiglic, Maya Skerbinjek-Kavalar, Jernej Završnik, Peter Kokol, “A journey through clinical applications of multimethod decision trees,” 9th Conference on Artificial Intelligence in Medicine in Europe, Protaras, Cyprus, Oct. 2003, pp. 249-253.

Petra Povalej, Mitja Lenič, Tatjana Welzer-Družovec, Marjan Družovec, Peter Kokol, “Multi- agent construction of hybrid intelligent systems,” proceedings A of the 6th International Multi- Conference Information Society IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 117-120.

Petra Povalej, Mitja Lenič, Milan Zorman, Peter Kokol, Margaret G. E. Peterson, Joseph M. Lane, “Intelligent data analysis of human bone density,” Sixteenth IEEE symposium on computer-based medical systems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 397- 402.

Damijan Rebernak, Mitja Lenič, Peter Kokol, Viljem Žumer, “Finding boundary subjects for medical decision support with support vector machines,” Sixteenth IEEE symposium on computer-based medical systems [also] CBMS 2003, New York, USA, Jun. 2003, pp. 385- 390.

Maja Skerbinjek-Kavalar, Petra Povalej, Matjaž Homšak, Peter Kokol, Milojka Molan Štiglic, “Recognizing the most important risk factors in diagnosing pediatric asthma with decision trees,” Asthma: From Genes to Clinical Management: proceedings of the 17th World Astma Congress, Saint-Petersburg, Russia, Jul. 20003, pp. 235-239.

Gregor Štiglic, Peter Kokol, “Grobe množice in njihova uporaba na področju napovedovanja športnih rezultatov,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 553-554.

Gregor Štiglic, Mitja Lenič, Peter Kokol, “Rough sets based feature selection,” Proceedings of the Third IASTED International Conference on Artificial Inteligence and Applications, Benalmádena, Spain, Sep. 2003, pp. 430-433. System Design Laboratory CS - 21

PRESENTATIONS BY THE LABORATORY MEMBERS

Peter Kokol: “Software Metrics,” lecture at the University of Madeira, Madeira, Portugal, July 14, 2003.

Milan Zorman: “Intelligent Systems,” lecture at the University of Madeira, Madeira, Portugal, July 17, 2003.

Peter Kokol: “Software Quality Founded on Design Laws,” presentation for 5.FP, Brussels, Belgium, Oct. 11, 2003.

Milan Zorman: “Intelligent e-Medical tools,” invited lecture at Vienna International conference on eLearning, eMedicine and eSupport, Vienna, Austria, Nov. 26, 2003.

Peter Kokol: “New Trends in Modern Nursing,” invited lecture at 10th anniversary of University College of Nursing Studies, Maribor, Slovenia, Dec. 5, 2003.

Mitja Lenič: “Presentation of Multimethod tool,” presentation of new features in Multimethod tool, Prague, Czech Republic, Dec. 10, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Peter Kokol: Member of steering committee, symposium, IEEE symposium on Computer Based Medical Systems, New York, United States, June 26–27, 2003.

Prof. Dr. Peter Kokol: Section chair, international conference, 7th IASTED International Conference on Software Engineering and Applications, Marina del Rey, United States, Nov. 3–5, 2003.

Prof. Dr. Peter Kokol: Co-ordinated organisation and implementation, symposium, International Symposium New Trends in Modern Nursing, Maribor, Slovenia, Dec. 5, 2003.

Prof. Dr. Peter Kokol: Reviewer for IEEE Computer.

Prof. Dr. Peter Kokol: Reviewer for IEEE Software.

Prof. Dr. Peter Kokol: Reviewer for Informatica Medica Slovenica, editor CS - 22 System Design Laboratory

in Chief.

Prof. Dr. Peter Kokol: Reviewer for Journal of Applied Systems Studies, editorial board.

VISITS TO OTHER INSTITUTIONS

Prof. Dr. Peter Kokol, SQUFOL project meeting participation, Budapest, Alojz Tapajner: Hungary, Feb. 2–3, 2003.

Prof. Dr. Peter Kokol: SQUFOL project meeting participation, London, United Kingdom, Apr. 12–13, 2003.

Prof. Dr. Peter Kokol, Visit of the Hospital for Special Surgery, visit, New Dr. Mitja Lenič: York, United States, June 26–27, 2003.

Prof. Dr. Peter Kokol, Bilateral project ISOQ (SLO-P-10/01-04), formal Asst. Prof. Dr. Milan Zorman: call, Madeira, Portugal, July 14–24, 2003.

Prof. Dr. Peter Kokol: SQUFOL Project Meeting, project meeting participation, D- 90411 Nürnberg, Germany, Sept. 8–10, 2003.

Dr. Mitja Lenič, Bilateral project ISCoMAA, formal call, Prague, Matej Mertik, Czech Republic, Dec. 8–12, 2003. Gregor Štiglic:

GUESTS AND VISITORS

Ann Isabel Cardoso Bilateral cooperation visit, Sep. 5-10, 2003. (University of Madeira, Madeira, Portugal):

Lenka Novakova, Bilateral cooperation visit, Nov. 27–30, 2003. Marcela Fejtova, Lenka Lhotska (Czech Technical University of Prague, Prague, Czech Republic): System Design Laboratory CS - 23

DECORATIONS, AWARDS, AND HONOURS

Gregor Štiglic: first place for the best student paper at the ERK 2003 conference, Ljubljana, Slovenia, Sept. 25, 2003. CS - 24 System Software Laboratory

SYSTEM SOFTWARE LABORATORY

Head: Prof. Dr. Damjan Zazula Phone: +386 2 220 74 80 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

J3-4482-0334- Značilnosti antralnih foliklov in zoritvena sposobnost jajčnih 02/3.05 celic v pogojih in vitro (Characteristics of antral follicles and the ability of in vitro ova maturation) Leader: Prof. Dr. Veljko Vlaisavljević (Teaching Hospital of Maribor) Participants: Prof. Dr. Damjan Zazula; Boris Cigale, MSc; Jurij Munda Project partner: Teaching Hospital of Maribor Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

This project began a year and a half ago, so that in the year 2003 our activities were still primarily focused on the construction of a proper research environment. We developed a software package which is used for transfer of 3D ultrasound recordings into the Windows environment of personal computers. This package works with recordings made in the Cartesian co-ordinate system. We also developed a prototype version of a computer recognition algorithm which detects ovarian follicles in 3D ultrasound images. For the time being, the algorithm’s sensitivity is still a bit too low, so we developed additional software tools for the manual correction and enhancement of computer-based follicle delineations. These tools are being used by the project partner in the Teaching Hospital of Maribor, where a larger test population is also going to be examined in order to define and tune the procedures and parameters for the automatic computer analysis of 3D ultrasound ovarian images. System Software Laboratory CS - 25

International projects

CoLoS Conceptual Learning of Science (American-European project) Leader: Prof. Dr. Damjan Zazula Participants: Dr. Dean Korošec; Asst. Prof. Dr. Božidar Potočnik; Matjaž Divjak, MSc; Jurij Munda; Aleš Holobar Financed by: Faculty of Electrical Engineering and Computer Science

In 2003, the System Software Laboratory also contributed to CoLoS activities. We participated in regular Annual Meeting which took place in September in Ljubljana, Slovenia, this time. At the same time, we were invited to demonstrate the VIDERO project and the virtual baby at the opening session of the EUROCON '03 conference, held in September in Ljubljana. But the most important activity started in conjunction with the CoLoS project in 2003 deals with the inclusion of haptics into the virtual training environments. We purchased a haptic device, DELTA 6D, which has been connected to the scenes written in VRML. The necessary computer interface was developed by Cedric Motsch, a French postgraduate student who joined our laboratory during his four-month research work.

NEW Neuromuscular Assessment in the Elderly Worker Leader: Prof. Dr. Damjan Zazula Participants: Dr. Dean Korošec, Aleš Holobar Project partner: Polytecnico di Torino Financed by: European Union

The main objectives of the NEW (Neuromuscular assessment in the Elderly Worker) project are non-invasive assessment of muscle properties, the prevention of muscle disorders and the reduction of their consequences. Our main focus is on the extraction of information from the raw signals detected on the muscles during their contraction, specifically on decomposition of surface EMG signals. During the last year we developed two novel approaches to the convolutive decomposition of close-to-orthogonal pulse sources. They are both based on correlation matrices of measurements. The first method utilises the inverse correlation matrix at zero lag, while the second approach performs joint-diagonalization of algebraic combinations of correlation matrices at non-zero lags. The performance of decomposition techniques was tested on both synthetic and real surface EMG signals. The latter were recorded in the LISiN laboratory, Politecnico di Torino, Italy, during low-force isometric contractions of the dominant bicep brachii muscles of 10 subjects. Both decomposition approaches proved highly noise resistant while successfully decomposing the surface EMG signals into their constituent motor unit action potential trains. CS - 26 System Software Laboratory

Completed research projects 2003

International project

IST-1999-10378 A generic environment for bio-numerical simulation - SimBio Leader: Asst. Prof. Dr. Božidar Potočnik Participants: Prof. Dr. Damjan Zazula; Dušan Heric; Boris Cigale, MSc; Daniel Bernad Project partners: University of Sheffield, Teaching Hospital of Maribor Financed by: European Union

Duration: July 2002 to July 2003

Image segmentation results overlaid on original MR knee image (left) and simulated knee joint kinematics: knee flexed around 90 degrees (right).

This project terminated in July 2003. We successfully performed site independent SimBio generic environment installation and evaluation/validation of final simulation results. We installed all the tools involved in the SimBio environment and also set up remote access to a cluster with a simulation tool in Germany. Our next task was to evaluate/validate a virtual model of a human knee joint built by the SimBio environment. We verified this model on two spots. First, we verified SimBio environment image segmentation results with our specially developed tools IST (i.e. image segmentation tool) and IPVT (i.e. image processing verification tool). Statistical verification of these intermediate results also pointed out sufficient accuracy from medical point of view. Second verification was performed on the final results of the SimBio environment. In our case, the final result was simulated knee joint kinematics. System Software Laboratory CS - 27

This kinematics was verified by orthopaedic surgeons, and also statistically by observing Euler rotation angles for bone tibia with respect to bone femur. The verification pointed out that articular proportions in the simulated knee joint are very clear. No obvious and non- physiological structure deformations were noticed. Besides the verification, we also contributed to the SimBio environment by two improvements. In the phase of patient imaging material acquisition, we developed an optical force measuring system for measuring a force in the magnetic field. The measured force was used in the modelling phase. Our next contribution was in the modelling phase, where we significantly improved the knee joint model by adding appropriate material properties to the knee structures and by accurate fastening of ligaments and muscles to the bone model.

AREVIDERO Assessment and Revision of a Virtual Delivery Room Leader: Prof. Dr. Damjan Zazula Participants: Dr. Dean Korošec; Matjaž Divjak, MSc; Aleš Holobar Project partners: Lucille Packard Children's Hospital at the Stanford University, Lionheart Technologies Incorporated Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

Duration: Jan. 2000 to Mar. 2003

The project goals concentrated on verification and validation of the VIDERO virtual tool for training in the environment of a virtual delivery room, improvement and extension of newborn’s life signs, and practical evaluation of such a tool in educational processes of neonatal medicine. Globally, the goals were already attained in 2002, as the project had to be completed by April 2003. In March, we finished it by a visit to the Centre for Paediatric Education (CAPE, http://news-service.stanford.edu/news/ november13/cape.html) led by Dr. Lou Halamek at Stanford University, Palo Alto, USA. Previously we had collaborated in the start-up and testing of the VIDERO system on the computers of Lucille Packard Children's Hospital at the Stanford University. Together with their experts we also designed a programme of validation study, in which the VIDERO system is planned to be used in the introductory training of medical students. Currently, the programme is being examined by the ethics committee of the hospital. It will soon begin at the Centre for Paediatric Education. The VIDERO system has already been recognised as one of the basic technologies which CAPE, as the first institution of its kind in the world, is introducing in the organised training of neonatologists. CS - 28 System Software Laboratory

PUBLICATIONS

Zvonko Fazarinc, Saša Divjak, Dean Korošec, Aleš Holobar, Matjaž Divjak, Damjan Zazula, “Quest for effective use of computer technology in education: from natural sciences to medicine,” Comput. appl. eng. educ., Vol. 11, No. 3, pp. 116-131, 2003.

Božidar Potočnik, Damjan Zazula, “Improved prediction-based ovarian follicle detection from a sequence of ultrasound images,” Comput. methods programs biomed., Vol. 70, pp. 199-213, 2003.

Riko Šafarič, Smiljan Šinjur, Borut Žalik, Rob M. Parkin, “Control of robot arm with virtual environment via the internet,” Proc. I.E.E.E., Vol. 91, No. 3, pp. 422-429, 2003.

Andrej Šoštarič, Bojan Imperl, Boro Jeřabek, “Home automation on the move,” Inf. MIDEM, Vol. 33, No. 2, pp. 100-104, 2003.

Veljko Vlaisavljević, Milan Reljič, Vida Gavrić-Lovrec, Damjan Zazula, N. Sergent, “Measurement of perifollicular blood flow of the dominant preovulatory follicle using three- dimensional power Doppler,” Ultrasound obstetr. gynecol., Vol. 22, No. 5, pp. 520-526, 2003.

Damjan Zazula, “A common approach to the analysis of cumulant-based ARMA identification,” Digit. signal process. (Print), Vol. 13, No. 2, pp. 233-251, 2003.

Gorazd Žiberna, Damjan Zazula, “Računalniška tvorba 3D zvoka v virtualnih prostorih,” Electrotechnical Review, Vol. 70, No. 3, pp. 96-102, 2003.

Matjaž Divjak, Franc Solina, “Rekonstrukcija objekta iz množice globinskih slik s superkvadriki,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 493-496.

Matjaž Divjak, Damjan Zazula, “Accuracy of 3D motion tracking using a stereo camera,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 48-51.

Matjaž Divjak, Damjan Zazula, “Prediction-based optical face and hand tracking in 3D,” Proceedings of the Third IASTED International conference on Visualization, imaging, and image processing, Benalmádena, Spain, Sep. 2003, Vol. 2, pp. 809-814.

Sébastien Grigis, Aleš Holobar, Damjan Zazula, “Improved recognition performance for orthogonal sources,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 153-157. System Software Laboratory CS - 29

Dušan Heric, Božidar Potočnik, “An image segmentation tool (IST),” Proceedings EC-VIP-MC 2003, 4th EURASIP conference focused on video/image processing and multimedia communications, Zagreb, Croatia, Jul. 2003, Vol. 2, pp. 483-488.

Aleš Holobar, Milan Ojsteršek, Damjan Zazula, “A new approach to parallel joint diagonalization of symmetric matrices,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 16-20.

Aleš Holobar, Damjan Zazula, “Slepa ločitev nekoreliranih impulznih izvorov v primeru nezadostnega števila meritev,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 295-298.

Dean Korošec, Aleš Holobar, Matjaž Divjak, Damjan Zazula, “Multilevel implementation of the dynamic virtual environment,” Fifth International Conference on Simulations in Biomedicine, 2003, pp. 477-486.

Dean Korošec, Mitja Slavinec, Daniel Bernad, “Physical model of bouyancy and its implementation for application in the simulated scuba diving,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. A, pp. 482-485.

Dean Korošec, Mitja Slavinec, Daniel Bernad, Primož Kolarič, Katja Prnaver, “Architecture of the virtual training system for buoyancy control,” Immersive projection technology and virtual environments 2003, pp. 309-310.

Smiljan Šinjur, Borut Žalik, “Tvorba posplošenega trikotniškega traku nad ravninskimi točkami,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 433-436.

Roberta K. Weber, Eileen Freeman, Daithí Ó. Murchú, Kari Kumpulainen, Dean Korošec, Richard Milwood, “A global assessment: comparative analysis of science curriculum & technology integration knowledge of preservice and inservice teachers,” Society for information technology & teacher education, 14th international conference annual, Alberquerque, New Mexico, USA, Mar. 2003, pp. 1256-1258.

Damjan Zazula, Aleš Holobar, “An approach to correlation-based source separation,” Proceedings of the IASTED International conference on Signal processing, pattern recognition, and applications, Rhodes, Greece, Jul. 2003, pp. 147-152. CS - 30 System Software Laboratory

PRESENTATIONS BY THE LABORATORY MEMBERS

Aleš Holobar: “Conclusions on advanced EMG decomposition techniques,” presentation at the 5th FP5-NEW project topic meeting, Munich, Germany, May 7, 2003.

Božidar Potočnik: “Validation of the SimBio environment image segmentation (registration) results,” presentation at the review FP5-SimBio project meeting, Leipzig, Germany, July 7, 2003.

Božidar Potočnik: “Validation of the SimBio environment knee kinematics simulation results,” presentation at the review FP5-SimBio project meeting, Leipzig, Germany, July 8, 2003.

Aleš Holobar, Matjaž Divjak: “VIDERO – Virtual Delivery Room,” presentation and demonstration of the virtual delivery room simulator at the international conference EUROCON 2003, Ljubljana, Slovenia, Sept. 22, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Asst. Prof. Dr. Božidar Potočnik, Topical SimBio meeting on knee joint modelling, Prof. Dr. Damjan Zazula, expert consultation, organisation and Boris Cigale, MSc, implementation, Maribor, Slovenia, Feb. 3–4, 2003. Dušan Heric, Daniel Bernad, Jurij Munda:

Prof. Dr. Damjan Zazula: Reviewer for Signal Processing.

Prof. Dr. Damjan Zazula: Reviewer for IEEE Transactions on Biomedical Engineering.

Prof. Dr. Damjan Zazula, Reviewer for International Journal of Medical Dr. Dean Korošec: Informatics.

Prof. Dr. Damjan Zazula Reviewer for Medical and Biological Engineering Aleš Holobar: and Computing.

Prof. Dr. Damjan Zazula: Reviewer for Informatica. System Software Laboratory CS - 31

VISITS TO OTHER INSTITUTIONS

Dr. Dean Korošec: Expert on preparation meeting BiH eLearning Task Force at the University of Tuzla, meeting participation, Tuzla, Bosnia and Herzegovina, Mar. 17–18, 2003.

Dr. Dean Korošec: Visit in the framework of the AREVIDERO project at the Lucille Packard Children's Hospital of the Stanford University, project meeting participation, Palo Alto, United States, Mar. 27–30, 2003.

Dr. Danilo Korže: ETUCO ETUCE Training: European Trade Union Online Networking - Higher Education at the Freie Universität Berlin, seminar participation, Berlin, Germany, Apr. 10, 2003.

Dr. Danilo Korže: EI/GEW-Berlin-Forum, "Shaping the European Area of Higher Education and Research", seminar participation, Berlin, Germany, Apr. 10–13, 2003.

Dr. Dean Korošec: Founding meeting BiH eLearning Task Force at the University of Tuzla, meeting participation, Tuzla, Bosnia and Herzegovina, Apr. 14–15, 2003.

Dušan Heric, Visit in the framework of the SimBio project at the Asst. Prof. Dr. Božidar Potočnik: Max-Planck Institut of Cognitive Neurscience, project meeting participation, Leipzig, Germany, July 6–8, 2003.

Aleš Holobar: Visit in the framework of the NEW project at the LISiN laboratory, Politecnico di Torino, research work, Turin, Italy, July 7–13, 2003.

Dr. Dean Korošec: Guest lecturer on Summer university in Tuzla, visit, Tuzla, Bosnia and Herzegovina, July 15–16, 2003.

Dr. Dean Korošec: Lecturer on series of seminars for pedagogical staffof the University of Tuzla on subject of new technology and distance learning, visit, Tuzla, Bosnia and Herzegovina, Oct. 23–16, 2003. CS - 32 System Software Laboratory

Dr. Danilo Korže: Project group COMENIUS 2.1 meeting at the Pädagogische Akademie Klagenfurt, meeting participation, Klagenfurt, Austria, Nov. 27–28, 2003.

GUESTS AND VISITORS

Prof. Dr. Zvonko Fazarinc Discussion about testing of the VIDERO installation (Hewlett-Pacard, Palo Alto, United at the Stanford School of Medicine and States): preparations for joint paper about VIDERO, visit, Jan. 7, 2003.

David Barber, Visit in the framework of the SimBio project, project Jill Vandermeulen, meeting participation, Feb. 3–4, 2003. Avril McCarthy (University of Sheffield, Sheffield, United Kingdom), Muriel Beaugonin (Engineering Systems International, Rungis, France):

Raphael Cellard "Modelling of human knee-joint kinematics", (Ecole Centrale de Nantes, Nantes, research in the framework of the FP5-SimBio France): project, research work, Apr. 7 to Aug. 7, 2003.

Cedric Motsch "Implementation of a 6 DOF haptic device with the (Ecole Centrale de Nantes, Nantes, VRML language", research work in the fields of France): haptic interfaces and virtual reality, research work, Aug. 22 to Dec. 22, 2003.

DECORATIONS, AWARDS, AND HONOURS

Prof. Dr. Damjan Zazula: Gold Medal of the University of Maribor for 2003, Maribor, Slovenia, Oct. 15, 2003.

Heterogeneous Computer Systems Laboratory CS - 33

HETEROGENEOUS COMPUTER SYSTEMS LABORATORY

Head: Asst. Prof. Dr. Milan Ojsteršek Phone: +386 2 220 74 51 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Applied projects

MVIVŠ Model vseživljenskega izobraževanja za visoko šolstvo v Sloveniji (Life-long Education Model of Slovenian College and Faculty Shcools) Leader: Dejan Dinevski (University of Maribor) Participants: Majda Pšunder; Ivan Gerlič; Janja Črčinovič Rozman; Manica Učnik Krump; Metka Zorič-Venuti, MSc; Andrejka Golob; Zvezdana Strmšek; Asst. Prof. Dr. Milan Ojsteršek; Albin Bregant; Prof. Dr. Peter Kokol; Mario Plenkovič; Nada Babić; Sofija Vrcelj; Herbert Tschamler Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

The main goal of this project is making a proposal for a systematic and transparent model of life-long education enabling informal university education with e-education concept support. The project will support the impementation of the "Bolognese" declaration from 1999, that favours the validity of credit scores (ECTS credit system) obtained outside the formal univesity education. The model will ensure the flexible offer of educational contents, that will be provided by university lecturers and partner institutions co-workers. The model will be under the same supervision as the formal study programmes. It will represent the basis for future activities on the collaboration of the university education system with industry and other commercial and non-commercial activities. CS - 34 Heterogeneous Computer Systems Laboratory

The important contribution of this project will be the basic scheme of life-long university education as an e-education. We will use our own programme environment for e-education - PUND we are developing at the University of Maribor. We will upgrade the PUND with functionalities that will support the specifics of life-long education. The project is featured by its interdisciplinarity as it will consist of acitve professionals of pedagogical sciences, special didactics of computer-based education, economic sciences and computer sciences.

SRAKA Spletni portal Sraka.com (Sraka.com Web Portal) Leader: Asst. Prof. Dr. Milan Ojsteršek Participants: Aleksander Kvas, MSc; Zlatko Čajič; Bojan Letnik; Borut Gorenjak; Albin Bregant; Boštjan Šorgo; Ervin Schaffranietz, MSc; Branko Horvat, MSc Financed by: Municipality of Oplotnica, Ministry of the Information Society, Nova KBM, d. d., Faculty of Electrical Engineering and Computer Science, University of Maribor, Municipality of Muta, Municipality of Sežana, Municipality of Radovljica, Municipality of Sveti Jurij, Municipality of Selnica, Municipality of Kungota, Municipality of Zreče, Municipality of Koper, Municipality of Maribor

Portal infrastructure facilitates creating, integrating, and managing information documents. This way, we can achieve higher efficiency for accessing such information since users spend less time to finding, using, and analyzing information. In addition, administrators spend less time helping users. The basic features of portals are: documents management, information search, integration of application services and content within an information system with external information systems, cross-referencing of content and services, providing collaborative services, information categorization, providing independence between data and its presentation in various media, multi-lingua information presentation, authentication and authorization of access to data and services and security consideration, personalization and customization. Portal is being updated with new functionality on a regular basis.

IPO-UD Razvoj integriranega programskega okolja za poučevanje in učenje na daljavo (Integrated software environmental development for distance- teaching and destance-learning.) Leader: Dejan Dinevski (University of Maribor) Participants: Asst. Prof. Dr. Milan Ojsteršek; Bojan Letnik; Borut Gorenjak; Albin Bregant; Ervin Schaffranietz, MSc; Branko Horvat, MSc; Zvezdana Heterogeneous Computer Systems Laboratory CS - 35

Strmšek; Metka Zorič-Venuti, MSc; Tomaž Klojčnik; Dr. Aleš Časar; Ivan Gerlič; Asst. Prof. Dr. Matjaž Debevc; Brane Šmitek Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, University of Maribor

The main goal of the project is pedagogical process modernization at the University of Maribor by applying a distance-learning-enabling software. The project comprises an infrastructure part to provide basic conditions for effective and efficient access to content and services for students, which should be enabled by distance-learning software. The software will be used by teaching staff and students of the University of Maribor. The software will facilitate work for the teaching staff for these tasks: entering multimedia study material for lectures and exercises, grading submitted works, exams, and seminars, communicating to students, knowledge examination and absence on lectures and exercises, access to academic core service, notification of students about results of their exams and exercises. Students can achieve these goals: accessing multimedia material, checking knowledge gained for certain topics, which will be presented in study material, submitting their exercises and other works, accessing core academic servce, communicating to pedagogical staff, getting notifications from teaching staff. The software for distance-learning should provide: suitable authentication, personalization and authorization of access to content and services, support for multi-lingual and data presentation on various media (infoterminals, Internet, mobile phones, palmtops).

MMZ Maribor – mesto znanja (Maribor - Town of Knowledge) Leader: Asst. Prof. Dr. Milan Ojsteršek Participants: Borut Gorenjak; Uroš Novak, MSc Financed by: Municipality of Maribor, Human Resource Management Fund

Software, realized within the project, makes it possible to present educational opportunities in the Maribor and Drava region on the Internet. This offer includes the possibilities for education, offered to members of the community by different companies, outside regular education. Data on educational opportunities is entered by interested organizations themselves by means of special software. Web application enables printout of data on educational activities (sorted by types of programme, by performers, by months, when educational activities are performed), search on educational activities (criteria is title, place, type of programme, date, performer, location) and search on performer (criteria is title and place). Data on educational activities, offered by others, can by downloaded to the computer of any person who is entering the data. CS - 36 Heterogeneous Computer Systems Laboratory

Completed research projects 2003

Applied project

PO-OO Izdelava programske opreme za obveščanje občanov o njihovih zadevah (Software implementation for citizen notification of administration matters) Leader: Rado Lipovec (Municipality of Koper) Participants: Asst. Prof. Dr. Milan Ojsteršek, Borut Gorenjak, Marjan Marušič, Boris Vuga Project partners: Municipality of Koper Financed by: Ministry of the Information Society

Duration: Sept. 2002 to Mar. 2003

The aim of this project is software implementation for helping a citizen to be notified about any of his application requirements, via e-mail or SMS. A citizen can also request any other event notification concerning his dealings with municipality administration. The data of a citizen are validated in a reception room when delivering the request. A citizen can update his data via a web browser with a SIGEN-CA certificate.

PUMD Nadgradnja portala za e-izobraževanje na Univerzi v Mariboru (Upgrade of Distance-Learning Portal of University of Maribor) Leader: Dejan Dinevski (University of Maribor) Participants: Asst. Prof. Dr. Milan Ojsteršek; Bojan Letnik; Borut Gorenjak; Albin Bregant; Ervin Schaffranietz, MSc; Branko Horvat, MSc; Zvezdana Strmšek; Metka Zorič-Venuti, MSc; Aleš Časar Financed by: Ministry of the Information Society, University of Maribor

Duration: July 2002 to Oct. 2003

Universities world-wide are heading towards informatic support for study and distance- learning service provision. This way, classical study is facilitated. In addition, more people have access to university study. The project aims at building a portal, which provides employees and students with effective informatic support for study process and distance- learning. Distance-learning services should be accessed via various digital media (Internet, mobile phones with WAP capability, info terminals, palmtops, voice-recognition interfaces etc.). In addition, the portal will serve as a communication system among university Heterogeneous Computer Systems Laboratory CS - 37

employees and students. The portal will contain a digital library of study material, term dictionary, support system for lecturers, administration, and students.

SEPLS-S Izdelava strateškega plana informatizacije lokalnih skupnosti (Strategic Plan for Informatization of Local Communities) Leader: Rado Lipovec (Municipality of Koper) Participants: Asst. Prof. Dr. Milan Ojsteršek; Branko Horvat, MSc; Katja Damij; Sašo Novakovič; Roman Tomažič; Marjan Marušič; Boris Vuga Project partners: Institut fuer Regelungstechnik, Institut za projektni management in informacijsko tehnologijo Financed by: Ministry of the Information Society

Duration: June 2002 to Mar. 2003

Our goal is a stratigic plan for the informatization of local communities. The leader of the project is the Municipality of Koper and works in cooperation with the 3-Port company of Koper, IPMIT from Ljubljana and the Faculty of Electrical Engineering and Computer Science (University of Maribor). The strategic plan will be based on the current IT status "snapshot" of local communities and will serve as a base for further activities in software development, which will enable e-commerce within local communities and between municipality and citizens, companies and the administration of the state.

SPIMOM Izdelava strateškega plana informatizacije mestne uprave Mestne občine Maribor (Strategic Plan for Informatization of the Municipality of Maribor) Leader: Asst. Prof. Dr. Milan Ojsteršek Financed by: Municipality of Maribor

Duration: Dec. 2001 to Dec. 2003

Our goal is to create a strategic information technology plan for the Municipality of Maribor. This plan will use the current state of the municipality’s IT development to further activities by introducing electronic commerce and to devise a plan of software development in the future. CS - 38 Heterogeneous Computer Systems Laboratory

International project

DATELINE Design and Application of a Travel Survey for European Long- distance Trips Based on an International Network of Expertise Leader: Asst. Prof. Dr. Milan Ojsteršek Participants: Branko Horvat, MSc Financed by: Fakulty for Civil Engineering, University of Maribor

Duration: Dec. 2001 to June 2003

The results of the European long-distance trip survey must be cleaned, transformed and integrated into a common database. This was the base for preliminary data analysis to prove or reject the validity of certain data and acting upon it. The main goal of our project is the provision of data in a suitable form and making it available under partly controlled conditions for analysis and downloading. We employed an advanced Nesstar technology which is tailor- made for social science surveys and representation. We should also support special analysis as a presentation of trips according to source and destination. A complete presentation of this project should also be made. A broader project has a code: 2000-AM.10016 and is a part of 5th Framework Programme of European Commission: "Competitive and Sustainable Growth".

PUBLICATIONS

Dejan Dinevski, Milan Ojsteršek, “Tehnologija in organizacija storitev e-izobraževanja,” Vzgoja in izobraževanje v informacijski družbi, Vol. 36, No. 8, pp. 538-544, 2003.

Aleksander Kvas, Milan Ojsteršek, “Izboljšava algoritmov statičnega razvrščanja z nestrogim proženjem vozlišč programskega grafa,” Electrotechnical Review, Vol. 70, No. 3, pp. 143-148, 2003.

Aleksander Kvas, Milan Ojsteršek, “A method for improving efficiency of static program graph scheduling,” CIT. J. Comput. Inf. Technol., Vol. 11, No. 2, pp. 135-141, 2003.

Milan Ojsteršek, Aleksander Kvas, “Improving efficiency of program graph scheduling with partial strict triggering of program graph nodes,” Informatica (Ljublj.), Vol. 27, No. 4, pp. 445- 450, 2003.

Milan Ojsteršek, Rado Lipovec, Marjan Marušič, SašoNovakovič, Boris Vuga, Roman Tomažič, “Strategija uvajanja elektronskega poslovanja v lokalne skupnosti,” Lex localis, Vol. 1, No. 2, pp. 109-130, 2003. Heterogeneous Computer Systems Laboratory CS - 39

Dejan Dinevski, Milan Ojsteršek, Tomaž Klojčnik, “E-izobraževanje na Univerzi v Mariboru,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 562-567.

Dejan Dinevski, Milan Ojsteršek, Mario Plenković, “Information technology platform for e- learning implementation,” Društvo i tehnologija 2003: (printed as manuscript), The 10th International Scientific Conference, Opatija, Croatia, Jun. 2003, pp. 148-158.

Aleš Holobar, Milan Ojsteršek, Damjan Zazula, “A new approach to parallel joint diagonalization of symmetric matrices,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 16-20.

Branko Horvat, Milan Ojsteršek, “Personalizacija in spletno rudarjenje,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 347-351.

Branko Horvat, Milan Ojsteršek, Zlatko Čajič, “SRAKA: a case of web portal architecture centered around horizontal services,” 21st IASTED International Multi-Conference Applied Informatics, Innsbruck, Austria, Feb. 2003, pp. 199-193.

Rado Lipovec, Milan Ojsteršek, Marjan Marušič, BorisVuga, Roman Tomažič, “Strateški plan informatizacije lokalnih skupnosti,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 616-621.

Milan Ojsteršek, Borut Gorenjak, Albin Bregant, Matjaž Potočnik, “Portal Fakultete za elektrotehniko, računalništvo in informatiko,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 352-357.

Zlatko Čajić, Branko Horvat, Milan Ojsteršek, “Horizontal services in web portals,” Technology for mobile society, 2003, pp. 29-38.

CS - 40 Geometric Modelling and Multimedia Algorithms Laboratory

GEOMETRIC MODELLING AND MULTIMEDIA ALGORITHMS LABORATORY

Head: Prof. Dr. Borut Žalik Phone: +386 2 220 74 71 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

International projects

VHCE Virtual Heart of Central Europe Leader: Andrej Ferko (Comenius University Bratislava) Participants: Dr. Sebastian Krivograd, Prof. Dr. Borut Žalik, Vid Domiter Project partners: Comenius University Bratislava, Czech Technical University Prague, Graz University of Technology Financed by: European Union, Faculty of Electrical Engineering and Computer Science

The goals of the project are the reconstruction of the most valuable towers and wells and rarities in Prague, Graz, Maribor and Bratislava and publishing 3D VRML models and digital stories at a new site Virtual Heart of Central Europe. This is a project, whose purpose is to promote cultural understanding throughout the world and protecting outstanding universal values and so enable Europeans to be consciously (and interactive) proud of their contribution to World Cultural Heritage. Within the project, we have presented using various multimedia types, including a 3D model, the following sights of Maribor: the oldest living vine (400 years), the Water Tower, the plague sign, the castle in the centre of the city, Slomšek square with the Cathedral of St. John the Baptist, the Franciscan Church, the synagogue, and the Town Hall in the Main Square. Geometric Modelling and Multimedia Algorithms Laboratory CS - 41

3D model of the cathedral of Maribor.

BI-CZ/03-04-16 Algorithms of Applied Computational Geometry Leader: Prof. Dr. Borut Žalik, Ivana Kolingerova (University of West Bohemia, Pilsen) Participants: Dr. David Podgorelec; Dr. Sebastian Krivograd; Matej Gomboši, MSc; Gregor Klajnšek; Mirko Zadravec Project partners: University of West Bohemia, Pilsen Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Government of the Czech Republic

After successful cooperation over several years with the group of dr. Ivana Kolingerova from the University of West Bohemia in Pilsen, we have decided to continue our common work. The main goals for further cooperation are work in the field of applied computational geometry, presentation of results of common research in international meetings, workshops and recognized journals, development of several new algorithms (triangulation, containment, data compression, data transmission through Internet, surface reconstruction), development of acceleration methods for existing algorithms and their application in other areas like GIS, and finally, preparation of common proposals for international projects. CS - 42 Geometric Modelling and Multimedia Algorithms Laboratory

Completed research projects 2003

Applied project

4/12/05 Izdelava računalniškega modula za sestavo kosovnice na podlagi projekta, izdelanega v AutoCAD-u (Software module for construction of the bill of materials from the AutoCAD project) Leader: Prof. Dr. Borut Žalik Participants: Mirko Zadravec, Smiljan Šinjur Financed by: Inter Expo, d. o. o.

Duration: Jan. to Feb. 2003

The module implemented in LISP programming language produces the bill of materials (BOM) with regard to the plan of the showroom. Available results are BOMs for particular showrooms, the entire exhibition hall or the whole market. At the end, the programme produces the ASCII file for connection with the financial application.

Research and development project

SMA_1.1F_ICB Posodobitev informacijskega sistema za vodenje nepremičnin (Real Estate Modernisation Project) Leader: Prof. Dr. Borut Žalik Participants: Dr. David Podgorelec Project partners: Surveying and Mapping Authority of Republic of Slovenia Financed by: Surveying and Mapping Authority of Republic of Slovenia

Duration: Feb. to Sept. 2003

This project work incorporated cooperation i.e. technical consulting at the commission for evaluation of project bids for the modernization of real estate information systems at the Surveying and Mapping Authority of the Republic of Slovenia. The commission had to choose between five bidders, mostly foreign, with Slovene cooperators. The work was performed in two phases. In the first phase, three bids were selected with respect to the technical adequacy of the proposed solutions, and the financial aspect was decided in the second stage. Both consultants from FERI were mostly concerned with the preliminary project plan, platform requirements plan and the proposed system architecture of each bid. Geometric Modelling and Multimedia Algorithms Laboratory CS - 43

International project

PDGO A programme for the construction of geometric buffers Leader: Prof. Dr. Borut Žalik Participants: Mirko Zadravec Financed by: GeoSpatial Technologies, Inc.

Duration: June to Sept. 2003

The algorithm for construction of geometric outlines is based on the sweep-line technique. A theoretical estimation of worst time complexity gives O(n2 log n), where n is the number of input vectors. However, the expected time complexity is very close to O(n log n), which is confirmed by the experiments. The algorithm proved stable and efficient in practice (also in comparison with an algorithm from the ArcView environment). It was implemented as a dynamically linked library (dll) in C++ programming language.

VVME Visualization of Volume Data in a Medical Environment Leader: Prof. Dr. Borut Žalik, László Szirmay-Kalos (Technical University of Budapest) Participants: Matej Gomboši, MSc; Gregor Klajnšek; Dr. Sebastian Krivograd; Dr. David Podgorelec Project partners: Technical University of Budapest Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Government of Republic of Hungary

Duration: Mar. 2002 to Dec. 2003

Visualization of Medical Data has become a powerful tool that helps radiologists to interpret the data obtained from CT and MRI devices. The goal of the project was to design an efficient algorithm, which would perform visualization of static (3D) and time-varying (4D) volume data. In cooperation with researchers from the Hungarian group, an algorithm entitled "differential splatting" was designed, which fulfills the criteria. The main advantage of the algorithm is that it can determine changes in 4D data and only the voxels changing from one to the next time step have to be re-rendered instead of entire volume. This algorithm also represents the main topic of the common Slovene-Hungarian publication. CS - 44 Geometric Modelling and Multimedia Algorithms Laboratory

PUBLICATIONS

Matej Gomboši, Borut Žalik, Sebastian Krivograd, “Comparing two sets of polygons,” International journal of geographical information science, Vol. 17, No. 5, pp. 431-443, 2003.

Matej Gomboši, Borut Žalik, Danijel Rebolj, “Uporaba standarda LandXML in razširitev PmcXML,” Uporab. inform. (Ljubl.), Vol. 11, No. 1, pp. 47-51, 2003.

Branko Kaučič, Borut Žalik, Franc Novak, “On the lower bound of edge guards of polyhedral terrains,” Int. j. comput. math., Vol. 80, pp. 811-814, 2003.

Marko Lamot, Borut Žalik, “A fast polygon triangulation algorithm based on uniform plane subdivision,” Comput. graph., Vol. 27, No. 2, pp. 239-253, 2003.

David Podgorelec, Borut Žalik, “Feature extraction and classification from boundary representation,” CIT. J. Comput. Inf. Technol., Vol. 11, No. 1, pp. 41-54, 2003.

Riko Šafarič, Smiljan Šinjur, Borut Žalik, Rob M. Parkin, “Control of robot arm with virtual environment via the internet,” Proc. I.E.E.E., Vol. 91, No. 3, pp. 422-429, 2003.

Borut Žalik, “An envelope construction of a set of polygons in a land cadastre,” Comput. geosci., Vol. 29, No. 7, pp. 929-935, 2003.

Borut Žalik, “A fast algorithm for an envelope construction of a huge set of topologically consistent polygons,” Eng. comput., Vol. 19, pp. 35-44, 2003.

Borut Žalik, Anton Jezernik, Krista Rizman Žalik, “Polygon trapezoidation by sets of open trapezoids,” Comput. graph., Vol. 27, No. 5, pp. 791-800, 2003.

Borut Žalik, Ivana Kolingerova, “An incremental construction algorithm for Delaunay triangulation using the nearest-point paradigm,” International journal of geographical information science, Vol. 17, No. 2, pp. 119-138, 2003.

Borut Žalik, Mirko Zadravec, Gordon J. Clapworthy, “Construction of a non-symmetric geometric buffer from a set of line segments,” Comput. geosci., Vol. 29, No. 1, pp. 53-63, 2003.

Matej Gomboši, Borut Žalik, “Analyzing changes between two sets of polygons using plane subdivision”, WSEAS Trans. Math., Vol. 2, No. 3, pp. 204-209, 2003.

Sebastian Krivograd, Gorazd Hren, Borut Žalik, Anton Jezernik, “Hiter algoritem za poenostavljanje in obnovitev trikotniških mrež za prenos rezultatov MKE preko svetovnega Geometric Modelling and Multimedia Algorithms Laboratory CS - 45

spleta = A fast triangular-mesh decimation-and-undecimation algorithm for transferring FEM results via the Web“, Stroj. vestn., Vol. 49, No. 11, pp. 524-537, 2003.

Gregor Klajnšek, David Podgorelec, Borut Žalik, “Efficient visualization of 4D fractal structures,” IAFA 2003 proceedings, The first South-East European symposium on Interdisciplinary approaches in fractal analysis, Bucharest, Romania, May 2003, pp. 219-223.

Gregor Klajnšek, Balázs Csébfalvi, “4D volume rendering by differential splatting,” ITI 2003: proceedings of the 25th International Conference on Information Technology Interfaces, Cavtat, Croatia, Jun. 2003, pp. 651-656.

Smiljan Šinjur, Borut Žalik, “Tvorba posplošenega trikotniškega traku nad ravninskimi točkami,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 433-436.

PRESENTATIONS BY THE LABORATORY MEMBERS

Sebastian Krivograd: “GEMMA Lab Research,” presentation of Slovene project partner in the VHCE project, Graz, Austria, June 11, 2003.

Borut Žalik: “Maribor Internet Visualizations,” presentation of experience of Slovene project partner in project areas, Graz, Austria, June 17, 2003.

Matej Gomboši: “Point-in-polygon strategies for generalized polygons,” lecture, presented at the Department of Computer Science and Engineering, University of West Bohemia in Plzeň, Czech Republic, Nov. 13, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Borut Žalik: Member of international programme board, international conference, Spring Conference on Computer Graphics, Budmerice, Slovakia, Apr. 24– 26, 2003.

Dr. David Podgorelec: Reviewer for Informatica.

Prof. Dr. Borut Žalik: Reviewer for Computers & Graphics. CS - 46 Geometric Modelling and Multimedia Algorithms Laboratory

VISITS TO OTHER INSTITUTIONS

Gregor Klajnšek: Working visit within bilateral project VVME - Visualization of Volume Data in Medical Environment, scientific collaboration, Budapest, Hungary, Feb. 3–10, 2003.

Dr. Sebastian Krivograd: Meeting participation inside the project VHCE - Virtual Heart of Central Europe, and presentation "Gemma Lab Research", project meeting participation, Graz, Austria, June 11, 2003.

Prof. Dr. Borut Žalik: Meeting participation inside the project VHCE - Virtual Heart of Central Europe, and presentation "Maribor Internet Visualizations", project meeting participation, Graz, Austria, June 17, 2003.

Matej Gomboši, MSc, Working visit within bilateral project Algorithms of Prof. Dr. Borut Žalik: Applied Computational Geometry, and presentation "Point-in-Polygon Strategies for Generalized Polygons", scientific collaboration, Pilsen, Czech Republic, Nov. 9–16, 2003.

Gregor Klajnšek: Working visit within bilateral project VVME - Visualization of Volume Data in Medical Environment, scientific collaboration, Budapest, Hungary, Nov. 24 to Dec. 21, 2003.

GUESTS AND VISITORS

Jiri Žara Insight into the lab projects because of participation (Czech Technical University Prague, in VHCE project and eventual further cooperation, Praha 2, Czech Republic): visit, June 4, 2003.

Balázs Csébfalvi, Working visit within bilateral project VVME - Jozsef Koloszar Visualization of Volume Data in Medical (Technical University of Budapest, Environment, scientific collaboration, Aug. 25–31, Budapest, Hungary): 2003.

Petr Vaneček, Working visit within bilateral project Algorithms of Ivana Kolingerova Applied Computational Geometry, and presentation Geometric Modelling and Multimedia Algorithms Laboratory CS - 47

(University of West Bohemia, Pilsen, of Petr Vaneček "Triangle Strips for Fast Pilsen, Czech Republic): Rendering", scientific collaboration, Sept. 28 to Oct. 5, 2003.

DECORATIONS, AWARDS, AND HONOURS

Matej Gomboši, MSc: research award of the "Pomurje Educational Foundation" for the best Master Thesis in Pomurje region in the last year, Murska Sobota, Slovenia, Apr. 15, 2003.

Institute of Informatics IN – 1

INSTITUTE OF INFORMATICS

Head: Prof. Dr. Ivan Rozman Phone: +386 2 235 51 00 E-mail: [email protected] URL: http://www.in.feri.uni-mb.si/

The informatics study programme covers the relevant aspects of information sciences, including information systems development, algorithm analysis and design, data structures, database design, software engineering, analysis, design and architectures of information systems, object technology and component based development, web services, enterprise collaboration, intelligent systems design, software quality management and security. Graduates pursue careers in the fields of software engineering, design and maintenance of information systems, intelligent systems, databases and security.

The research work by the members of the Institute is focused on several fields of software engineering with special emphasis on object-oriented methods and tools, information systems design, intelligent systems supporting system engineering activities, expert systems and knowledge systems design, database design, security implementation and design, and implementation of software quality management methodologies.

From the school year 2002/2003 the Institute of informatics is also the teaching and research base for the new study programme Media Communication. This is an interdisciplinary study, which covers different fields of media from radio and TV production, informatics and computer science as well as interactive graphic communication.

The educational and research activities of the Institute are divided into four laboratories. IN – 2 Institute of Informatics

Institute of Informatics Head: Prof. Dr. Ivan Rozman

Database Information Technologies System Laboratory Laboratory Head: Head: Assoc. Prof. Dr. Tatjana Welzer Prof. Dr. Ivan Rozman Družovec

Computer Mediated Real-Time Communication Systems Laboratory Laboratory Head: Head: Prof. Dr. József Györkös Prof. Dr. Matjaž Colnarič

Information Systems Laboratory

Head: Prof. Dr. Ivan Rozman

Employees: Assoc. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Davor Bonačić, MSc; Aleš Živkovič, MSc; Boštjan Kežmah, MSc; Simon Beloglavec, BSc; Tomislav Rozman, BSc; Katja Harej, BSc; Gregor Polančič, BSc; Boštjan Šumak, BSc; Maja Pušnik, BSc; Andrej Krajnc, Ing.; Miha Strehar Institute of Informatics IN – 3

Database Technology Laboratory

Head: Assoc. Prof. Dr. Tatjana Welzer Družovec

Employees: Boštjan Brumen, BSc; Izidor Golob, MSc; Katja Udir, BA; Aleš Vrabič

Computer Mediated Communication Laboratory

Head: Prof. Dr. József Györkös

Employees: Andrej Bregar, MSc; Boris Lahovnik, BSc

Real-Time Systems Laboratory

Head: Prof. Dr. Matjaž Colnarič

Employees: Asst. Prof. Dr. Domen Verber; Dr. Roman Gumzej; Dr. Matej Šprogar; Stanislav Moraus, BSc; Bojan Hadjar, Ing.; Rok Ostrovršnik, BSc

IN - 4 Information Systems Laboratory

INFORMATION SYSTEMS LABORATORY

Head: Prof. Dr. Ivan Rozman Phone: +386 2 235 51 00 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

CRP-3311-03- Metodologija razvoja integriranih informacijskih rešitev v 828898 konvergenčnem okolju (Methodology for the development of integrated information solutions in a convergent environment) Leader: Prof. Dr. Ivan Rozman Participants: Assoc. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Aleš Živkovič, MSc; Davor Bonačić, MSc; Boštjan Kežmah, MSc; Andrej Bregar, MSc; Tomislav Rozman; Gregor Polančič; Katja Harej; Simon Beloglavec; Regina Stajnko; Boštjan Šumak; Maja Pušnik; Miha Strehar; Boris Lahovnik Financed by: Ministry of the Information Society, Ministry of Education, Science and Sport of the Republic of Slovenia

The basic goal of this project is to introduce a unified methodology for the development of integrated information solutions in a convergent environment, which will consist of a methodological framework incorporating patterns, and mechanisms for applying the methodology to real information systems according to several pilot implementations provided for particular approaches and methods. The following aspects will be covered: - Scientific: the design of a methodology for the development of integrated solutions representing a theoretical foundation in the form of a framework, which specifies a technological and platform-independent approach to information systems integration, and covers both the development of new solutions, as well as the integration of existing Information Systems Laboratory IN - 5

applications. - Strategic: the application of solution patterns provides definitions of certain restrictions, and thereby ensures concordance of resulting solutions with accepted technological and semantic standards, as the Single European Electronic Market standards (SEEM). - Practical: processes of methodology application to real information systems and pilot implementations offer organizations ways to quickly implement integration concepts, and to consequently gain practical value from projects without making too high investments. - Comparative: by defining the integrability index, it is possible to compare, using a unified, quantitative metric, the level of integration which is achieved by the information system of an organization and is expressed in the form of a multi-criteria vector.

Research and development projects

TMIKT-ItTk Tehnološka mreža Informacijsko komunikacijske tehnologije (Technology network of information-communications technology) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Assoc. Prof. Dr. Tatjana Welzer Družovec; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Aleš Živkovič, MSc; Davor Bonačić, MSc; Boštjan Kežmah, MSc; Andrej Bregar, MSc; Tomislav Rozman; Gregor Polančič; Katja Harej; Simon Beloglavec; Regina Stajnko; Boštjan Šumak; Maja Pušnik; Miha Strehar; Boris Lahovnik Project partners: Faculty for Electrical Engineering in cooperation with companies and institutions - network members, Institute for Economic Research The vision of the technology network originates from the recognizable common benefits of network members, and from the indicated opportunities in the field of information- communication technologies. The major advantages are related with the predicted high growth rates in certain areas of information-communication technologies’ usage, and with faster economic growth in the States of Central and South-eastern Europe. The key goals of the technology network are the development of new technologies, services and contents aimed at reaching higher added value, introduction of an innovatory development environment, generation of new knowledge contributed by network member organizations, and a positive influence on other economic areas. IN - 6 Information Systems Laboratory

MEVSVKID Metodologija enotnega vzpostavljanja sistemov vodenja kakovosti v informacijski družbi (Methodology for Unified Quality Management System Establishment in Information Society) Leader: Asst. Prof. Dr. Romana Vajde Horvat Participants: Asst. Prof. Dr. Romana Vajde Horvat, Prof. Dr. Ivan Rozman, Katja Harej, Tomislav Rozman, Gregor Polančič, Boris Lahovnik Financed by: Ministry of the Information Society, Ministry of Education, Science and Sport of the Republic of Slovenia

The goal of this project is the development of a unified methodology for a quality management system (QMS) establishments in organizations. This methodology should be applicable for all sizes and types of organizations (also for software development organizations). The project is divided into two phases. Within the first phase, knowledge gathering and analysis, of existing models was performed. Models for process management, process modelling, quality management systems and resource management were studied and common characteristics were defined. In the second phase, a methodology for quality management system establishment is being developed, using the information provided within the first phase. This methodology provides optimal process definition and documentation. It also considers the involvement of personnel and any required training for an efficient QMS establishment.

Industrial projects

TPS COBISS Tehnološka prenova sistema COBISS (Technological Reengineering of COBISS System) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Romana Vajde Horvat; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah, MSc; Boštjan Šumak; Miha Strehar; Maja Pušnik; Katja Harej; Gregor Polančič; Tomislav Rozman; Boris Lahovnik Financed by: IZUM

Institute of Informatics ensures advisement services, object technology education and qualifications and quality for the needs of COBISS information system reengineering, respectively COBISS 3 information system reengineering. The emphasis is on information system development based on the Java platform and XML technologies, web services, Information Systems Laboratory IN - 7

distributed object architectures, unified modeling language (UML), and object process models. Other more important goals of collaboration are creating standard procedure and reestablishment of quality management system. In the project, the Institute of Informatics has researched certain parts of the remote method evocation security in more detail and searched for suitable solutions through the pilot solutions development.

PIA-ISDM Projekt PIA-ISDM Postavitev integralne arhitekture informacijskega sistema družbe Mobitel, d. d (Project PIA-ISDM Setting an integral architecture of the MOBITEL IS) Leader: Prof. Dr. Ivan Rozman Participants: Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah, MSc; Boštjan Šumak; Maja Pušnik; Miha Strehar; Andrej Krajnc Financed by: Razvojni center IRC Celje, d. o. o., Slovenia

The Laboratory of Informatics participated in the research and design of an integral architecture for an information system, part of a larger project, which is performed by the “Development center IRC Celje, d. o. o.”, FERI Maribor and FRI Ljubljana for the needs of the Mobitel company. The basic goal of the project is to reengineer the existing IS in order to meet requirements of efficient e-business. Open integral information architecture has been defined, using modern technologies such as J2EE, XML and web services. The approach to apply modern technologies and to integrate the existing IS has been defined as well.

POT Prehod na objektno tehnologijo (Transition to Object Technology) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Boštjan Kežmah, MSc; Simon Beloglavec; Miha Strehar; Boštjan Šumak; Maja Pušnik Financed by: Nova KBM, d. d.

The Object Technology Centre assists the technological evaluation of pilot projects for the component-based development of web object applications using object modelling (UML), web services, XML, ebXML and BPML e-business frameworks, distributed object model CORBA, Java, JavaBeans and Enterprise JavaBeans, object-relational database management systems, object transaction monitors, and networked computers. In addition, special attention is paid to establishing a defined and systematic object-oriented software development process. IN - 8 Information Systems Laboratory

International projects

ManagerEUr-CEPV ManagerEUr - Certified EU project manager Participants: Prof. Dr. Ivan Rozman, Asst. Prof. Dr. Romana Vajde Horvat, Katja Harej, Gregor Polančič, Tomislav Rozman, Regina Stajnko Financed by: EU Leonardo da Vinci

This project aims to develop a European skill card of a certified EU project manager. This skill card will be made available through an up-to-date solution (MM 1032 multimedia project CREDIT, 1998 – 2001), which offers an online system for browsing the skills card, performing self-assessment online, collecting evidence, and receiving a formal assessment of the evidence online. A skills gaps profile will show which course modules the student would still have to attend to manage accreditation as a certified EU project manager. The project will develop the courses, the skills card, and configure the accreditation system for online services. 1. A guideline co-written by a group of methodological experts and users (managers with EU project experience) outlining the methodology and case studies from practice. Each chapter will include guidance, examples from practices, and tips on how to do it by yourself. The chapters will be aligned with the course modules offered. 2. Development of course modules focusing on: a. Planning an EU Project, b. Contract Management, c. Controlling Performance and Efforts, d. Financial Reporting, e. Deliverable Design Processes, f. Internal Review Processes, g. External Review Processes, h. Conflict Management, i. Cultural Aspects, j. e-Working Infrastructures for Team Management, k. Measurement of Objectives, l. Exploitation and Integration. 3. Structuring the required skills of a certified EU project manager in the form of a European skill card. This can later be fed into different European accreditation systems because we will keep skill card design standards (knowledge stems from the previous CREDIT project). 4. An online self-assessment and accreditation system so that managers can identify skills gaps required to become a skilled EU project manager (system stems from the previous CREDIT project). 5. Translation of the course modules into Hungarian, Spanish, Slovene and Romanian, beside English. 6. Collaboration with NCPs to achieve recognition of this certificate. II is responsible for: - Definition of required knowledge and characteristics of EU Project Manager - Development of knowledge pool for EU Project Manager Information Systems Laboratory IN - 9

- Definition of training materials - Definition of certification requirements - Development of training and certification network operational rules Improvement of supporting software for skill cards management.

ISCoMAA Intelligent Systems Construction by Multiple Autonomous Agents Participants: Asst. Prof. Dr. Vili Podgorelec, Dr. Matej Šprogar Project partners: Czech Technical University of Prague Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

In order to design successful intelligent systems to be used in medical applications, we must design them with an appropriate design methodology. Therein lies another weakness–very few, if any, such methods exist in the world. Therefore the goals of our research are: - to develop successful design methods - to use these methods in designing real-world agent based intelligent medical systems.

Completed research projects 2003

Industrial project

IPRJ Izobraževanje za področje razvoja informacijskih sistemov v Javi (Education in the field of information systems development in Java) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Boštjan Kežmah, MSc; Simon Beloglavec; Boštjan Šumak; Maja Pušnik Financed by: MOBITEL, telekomunikacijske storitve, d. d.

Duration: Sept. to Oct. 2003

Within the scope of the project, the Institute of Informatics has ensured advisement services and education covering the use of modern Java platform technologies for information systems development, with emphasis on Java 2 Standard Edition (J2SE), Java 2 Enterprise IN - 10 Information Systems Laboratory

Edition (J2EE) and CORBA technologies. Practical examples have been provided to demonstrate the functionalities of key concepts.

SPUST Svetovanje in pomoč pri uporabi sodobnih tehnologij J2EE, CORBA, spletne storitve in EAI (Advisement services and assistance in the use of modern technologies J2EE, CORBA, web services, and EAI) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Boštjan Kežmah, MSc; Simon Beloglavec; Boštjan Šumak; Maja Pušnik Financed by: HERMES SoftLab

Duration: Mar. to May 2003

The Institute of Informatics has ensured advisement services, education and assistance covering the use of modern technologies for information systems development, with emphasis on Java 2 Enterprise Edition (J2EE), CORBA, web services and Enterprise Application Integration (EAI) technologies. Practical examples have been provided to demonstrate the key concepts of referential solutions.

MA MA (Mobitelova akademija) (MA (Mobitel Academy)) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Aleš Živkovič, MSc; Simon Beloglavec; Asst. Prof. Dr. Romana Vajde Horvat Financed by: MOBITEL, telekomunikacijske storitve, d. d.

Duration: Jan. 2002 to Dec. 2003

We have collaborated by defining the design and programme of the Mobitel academy and by organizing creative workshops, study workshops and educational workshops for external and internal participants on the subject relating to the application development and development of new services with JAVA technologies and quality management systems. Information Systems Laboratory IN - 11

International project

TEAMWork IST- Technology Exploatation and Adaptable Methodologies 2000-28162 offering new Organisational Models and Practices for e-Working Teams Participants: Prof. Dr. Ivan Rozman, Asst. Prof. Dr. Romana Vajde Horvat, Assoc. Prof. Dr. Tatjana Welzer Družovec, Gregor Polančič, Tomislav Rozman, Regina Stajnko, Dr. Boštjan Brumen, Katja Harej Financed by: European Union

Duration: July 2001 to Mar. 2003

- Evaluation of business analysis methodology BestregIT. - Evaluation and improvement of document flow modelling method NQA, - Improvement of existing software for document flow management in an organization (NGA system) - Modelling of Socrates Program document flow support The NQA and BESTREGIT methodology were tested and reviewed by the Institute of Informatics. Reviews were based on the usage of NQA and BESTREGIT for the modelling and automatization of the Socrates Erasmus student exchange programmes. Using BESTREGIT and NQA: - Roles, involved in SE were defined, - Document flow of SE student exchange was defined, - Document flow was implemented in NQA, - The review report was produced for NQA and BESTREGIT.

PUBLICATIONS

Andrej Bregar, József Györkös, Ivan Rozman, “An alternative sorting procedure for interactive groupdecision support based on the pseudo-criterion concept,” Journal of systemics, cybernetics and informatics, 2003.

Boštjan Brumen, Izidor Golob, Tatjana Welzer-Družovec, Ivan Rozman, Marjan Družovec, Hannu Jaakkola, “An algorithm for protecting knowledge discovery data,” Informatica, Vol. 14, No. 3, pp. 277-288, 2003. IN - 12 Information Systems Laboratory

Marjan Heričko, Simon Beloglavec, Matjaž B. Jurič, Boštjan Kežmah, “Eksplicitna in implicitna uporaba vzorcev pri razvoju informacijskih rešitev,” Uporab. inform. (Ljubl.), Vol. 11, No. 3, pp. 138-149, 2003.

Marjan Heričko, Matjaž B. Jurič, Ivan Rozman, “Časovna in prostorska analiza serializacije objektov v javi in .NET,” Electrotechnical Review, Vol. 70, No. 3, pp. 155-161, 2003.

Marjan Heričko, Matjaž B. Jurič, Ivan Rozman, Simon Beloglavec, Aleš Živkovič, “Object serialization analysis and comparison in Java and.NET,” SIGPLAN not., Vol. 38, No. 8, pp. 44- 54, 2003.

Marjan Heričko, Aleš Živkovič, Ivan Rozman, Matevž Rostaher, Peter Repinc, “Vrednotenje uporabe principov ekstremnega programiranja,” Organizacija, Vol. 36, No. 1, pp. 28-37, 2003.

Maurizio Pighin, Vili Podgorelec, Peter Kokol, “Fault-threshold prediction with linear programming methodologies,” Empirical software engineering, Vol. 8, No. 2, pp. 117-138, 2003.

Aleš Živkovič, Marjan Heričko, Tomaž Kralj, “Empirical assessment of methods for software size estimation,” Informatica (Ljublj.), Vol. 27, No. 4, pp. 425-432, 2003.

Boštjan Kežmah, “Spletne storitve v virtualnih organizacijah,” Naše gospod., Vol. 49, No. 1/2, pp. 95-109, 2003.

Peter Kokol, Eva Feuer, Mitja Lenič, Vili Podgorelec, Ana Isabel Cardoso, Rui Gustavo Crespo, “Reverse bifurcations in software development,” IAFA 2003 proceedings, The first South-East European symposium on Interdisciplinary approaches in fractal analysis, Bucharest, Romania, May 2003, pp. 229-234.

Andrej Bregar, József Györkös, Ivan Rozman, “An alternative sorting procedure for interactive group decision support based on the pseudo-criterion concept,” 7th World Multiconference on Systemics, Cybernetics and Informatics [also] SCI 2003, Orlando, Florida, USA, Jul. 2003, pp. 353-358.

Andrej Bregar, József Györkös, Ivan Rozman, Matjaž B. Jurič, Marjan Heričko, “Pseudo- criterion based group consensus seeking,” Connect in Tampa, 2003 Americas conference on information systems [also] AMCIS 2003, Tampa, Florida, USA, Aug. 2003, pp. 2293-2301.

Katja Harej, Romana Vajde Horvat, “Proces vzpostavitve virtualne skupine,” 6. mednarodna multi-konferenca Informacijska družba IS 2003, Oct. 2003, B, pp. 243-246. Information Systems Laboratory IN - 13

Katja Harej, Romana Vajde Horvat, Ivan Rozman, “Lastnosti in proces vzpostavitve virtualne skupine,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 327-332.

Katja Harej, Romana Vajde Horvat, Ivan Rozman, “A process for an effective establishment of a virtual team,” Proceedings of the Conference Digital Economy, MIPRO 2003, Opatija, Croatia, May 2003, pp. 46-50.

Marjan Heričko, Matjaž B. Jurič, Matevž Rostaher, Peter Repinc, “Applying practices of extreme programming,” 21st IASTED International Multi-Conference Applied Informatics, Innsbruck, Austria, Feb. 2003, pp. 955-960.

Boštjan Kežmah, Marjan Heričko, Ivan Rozman, “Integracijska infrastruktura virtualne organizacije,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 118-123.

Boštjan Kežmah, Matjaž B. Jurič, Marjan Heričko, Ivan Rozman, “Identifikacija temeljnih razlik med pristopi k implementaciji rešitev ERP,” Informacijska družba IS 2003, Oct. 2003, B, pp. 162-165.

Boštjan Kežmah, Ivan Rozman, “Web services in ERP solutions: a managerial perspective,” Meta informatics: revised papers (Lecture notes in computer science, 2641), pp. 177-179.

Miroslav Kolarič, Marjan Heričko, “Vzorci v testirnih ogrodjih,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 401-404.

Andrej Krajnc, Marjan Heričko, “Classification of object-oriented frameworks,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 57- 61.

Andrej Krajnc, Marjan Heričko, “Interoperabilnost portalov,” Informacijska družba IS 2003, Oct. 2003, B, pp. 174-177.

Andrej Krajnc, Marjan Heričko, “Vloga osnovnih komponent ebXML pri medorganizacijskem poslovanju,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 377-380.

Mitja Lenič, Petra Povalej, Milan Zorman, Vili Podgorelec, Peter Kokol, Lenka Lhotska, “Multimethod machine learning approach for medical diagnosing,” New solutions for new challenges: conference programme, 2003, pp. 195-198. IN - 14 Information Systems Laboratory

Bojan Novak, “Fuzzy complexity estimation of a nonlinear learning machine,” The IEEE Region 8 EUROCON 2003: computer as a tool, Ljubljana, Slovenia, Sep. 2003, Vol. 2, pp. 166-170.

Bojan Novak, “Fuzzy kernel machines algorithms,” Informacijska družba IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 101-103.

Bojan Novak, “Fuzzy pattern recognition in Hilbert spaces,” 7th International Symposium on Operational Research in Slovenia, Podčetrtek, Slovenia, Sep. 2003, pp. 47-52.

Bojan Novak, “A multivalent logic approach to risk estimation of learning machines,” The proceedings of the IJCNN 2003 International joint conference on neural networks, Doubletree hotel - Jantzen Beach, Portland, Oregon, USA, Jul. 2003, pp. 2312-2316.

Luka Pavlič, Romana Vajde Horvat, “Izvedbe arhitekture uporabniškega vmesnika portalov inTiles,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 385-388.

Vili Podgorelec, “Complexity-driven evolution of meta-agents for classification of medical data,” Proceedings of the Third IASTED International Conference on Artificial Inteligence and Applications, Benalmádena, Spain, Sep. 2003, pp. 418-423.

Gregor Polančič, Romana Vajde Horvat, “Prednosti uporabe spletnih programskih ogrodij,” Informacijska družba IS 2003, Oct. 2003, B, pp. 182-185.

Gregor Polančič, Romana Vajde Horvat, “Razvoj spletnih aplikacij temelječ na ogrodju,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 361-364.

Gregor Polančič, Romana Vajde Horvat, Ivan Rozman, “Skupne značilnosti portalov,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 370-375.

Maja Pušnik, Matjaž B. Jurič, Marjan Heričko, IvanRozman, Boštjan Šumak, “A comparison of ebXML and RosettaNet,” Proceedings of the Conference Digital Economy, MIPRO 2003, Opatija, Croatia, May 2003, pp. 19-24.

Maja Pušnik, Matjaž B. Jurič, Marjan Heričko, Ivan Rozman, Boštjan Šumak, “Elektronsko poslovanje in orkestracija poslovnih procesov,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 462-467. Information Systems Laboratory IN - 15

Maja Pušnik, Matjaž B. Jurič, Marjan Heričko, BoštjanŠumak, “Electronic business framework evaluation,” Informacijska družba IS 2003, Oct. 2003, B, pp. 178-181.

Maja Pušnik, Matjaž B. Jurič, Marjan Heričko, Boštjan Šumak, Ivan Rozman, “Business process orchestration and eBusiness,” Sixteenth Bled eCommerce Conference, Bled, Slovenia, Jun. 2003, pp. 160-171.

Tomislav Rozman, Romana Vajde Horvat, Ivan Rozman, “"Silver bullet" for business processes modeling and execution?,” Computers in technical systems and intelligent systems: proceedings of the joint conferences CTS+CIS, XXVI. International Convention, MIPRO 2003, Opatija, Croatia, May 2003, pp. 59-63.

Tomislav Rozman, Romana Vajde Horvat, Ivan Rozman, “"Srebrni metek" za modeliranje in izvajanje poslovnih procesov?,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 94-100.

Boštjan Šumak, Marjan Heričko, Matjaž B. Jurič, Maja Pušnik, “Izzivi pri zasnovi arhitekture portalne rešitve,” Informacijska družba IS 2003, Oct. 2003, B, pp. 170-173.

Boštjan Šumak, Marjan Heričko, Ivan Rozman, Maja Pušnik, “Avtomatizacija elektronskega poslovanja s pomočjo povezovalnih strežnikov,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 468-473.

Boštjan Šumak, Marjan Heričko, Ivan Rozman, Maja Pušnik, “E-business integration servers,” Proceedings of the Conference Digital Economy, MIPRO 2003, Opatija, Croatia, May 2003, pp. 25-30.

Aleš Živkovič, Marjan Heričko, Ivan Rozman, “Function points in object oriented analysis and design,” 21st IASTED International Multi-Conference Applied Informatics, Innsbruck, Austria, Feb. 2003, pp. 986-990.

Aleš Živkovič, Tomaž Kralj, “Empirical assessment of function points method's family,” Informacijska družba IS 2003, Oct. 2003, pp. 154-157.

PRESENTATIONS BY THE LABORATORY MEMBERS

Marjan Heričko, Aleš Živkovič: “Modeliranje sodobnih aplikacij z jezikom UML (Modern Application Modeling with UML),“ presentation on NT conference 2003, Portorož, Slovenia, May 6, 2003. IN - 16 Information Systems Laboratory

Matjaž B. Jurič: “Primerjava arhitektur .NET in J2EE (J2EE and .NET Comparison),“ presentation on NT conference 2003, Portorož, Slovenija, May 8, 2003.

Matjaž B. Jurič: “Vloga in pregled jezika J# (Role and Overview of J#),“ presentation on NT conference 2003, Portorož, Slovenija, May 8, 2003.

Marjan Heričko: “Načrtovalski vzorci in C# (Design Patterns and C#),“ presentation on NT conference 2003, Portorož, Slovenija, May 8, 2003.

Boštjan Kežmah: “Architecture and guidelines for mobile devices software development,” techNet and MSDN lecture, Ljubljana, Slovenia, Sept. 30, 2003.

Vili Podgorelec: “Using Chaos to Imply Order in Software Engineering: Evaluating software metrics and intelligent systems,” invited lecture on conference SEA'2003, United States, Nov. 5, 2003.

Katja Harej, Romana Vajde Horvat, Ivan Rozman: “A Virtual Team Establishment Process,” paper on the conference IBIMA 2003, Cairo, Egypt, Dec. 18, 2003.

Tomislav Rozman, Romana Vajde Horvat, Ivan Rozman: “Experiences with Business Process Modeling Notation in Educational Process,” paper on the conference IBIMA 2003, Cairo, Egypt, Dec. 18, 2003.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Ivan Rozman: Member of programme board, expert consultation, 10th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 16–18, 2003.

Aleš Živkovič, MSc, Programme committee member, conference, Assoc. Prof. Dr. Marjan Heričko, Object Technology in Slovenia, Maribor, Slovenia, Prof. Dr. Ivan Rozman, June 18–19, 2003. Asst. Prof. Dr. Branko-Matjaž Jurič:

Prof. Dr. Ivan Rozman: Member of international programme board, international conference, 14th International Conference on Information and Intelligent Systems, Varaždin, Croatia, Sept. 24–26, 2003.

Prof. Dr. Ivan Rozman: Chairman, conference, Development and reingeneering of information system, Ljubljana, Information Systems Laboratory IN - 17

Slovenia, Oct. 13–17, 2003.

Asst. Prof. Dr. Branko-Matjaž Jurič, Programme committee member, conference, Assoc. Prof. Dr. Marjan Heričko, Collaboration and Information Society, Ljubljana, Aleš Živkovič, MSc: Slovenia, Oct. 13–17, 2003.

Prof. Dr. Ivan Rozman: Programme committee member, arrangement, INFOS 2003, Ljubljana, Slovenia, Oct. 21–24, 2003.

Assoc. Prof. Dr. Marjan Heričko: Programme committee member, arrangement, INFOS 2003, Ljubljana, Slovenia, Oct. 21–24, 2003.

Asst. Prof. Dr. Vili Podgorelec: Co-ordinated organisation and implementation, international conference, 7th IASTED International Conference on Software Engineering and Applications, Marina del Rey, United States, Nov. 3–5, 2003.

Prof. Dr. Ivan Rozman, Member of international programme board, Assoc. Prof. Dr. Marjan Heričko: international conference, Information Society 2002, Ljubljana, Slovenia, Nov. 13–17, 2003.

Aleš Živkovič, MSc, OTS'2003 Object technology in Slovenia, Boštjan Šumak, conference, organisation and implementation, Maja Pušnik, Maribor, Slovenia, June 18–19, 2003. Simon Beloglavec, Boštjan Kežmah, MSc, Miha Strehar, Regina Stajnko:

Boštjan Kežmah, MSc, Microsoft .NET Framework Summer School, Miha Strehar, creative workshop for students, co-ordinated Andrej Krajnc: organisation and implementation, Maribor, Slovenia, July 21–25, 2003.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer for International Journal of Distance Education Technologies.

Asst. Prof. Dr. Vili Podgorelec: Reviewer for IEEE Transactions on Evolutionary Computation. IN - 18 Information Systems Laboratory

Asst. Prof. Dr. Vili Podgorelec: Reviewer for Artificial Intelligence in Medicine.

Asst. Prof. Dr. Vili Podgorelec: Reviewer for Informatica Medica Slovenica.

Asst. Prof. Dr. Vili Podgorelec: Reviewer for International Journal of Medical Informatics.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer for Elsevier Information and Software Technology Journal.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer for John Wiley & Sons.

Asst. Prof. Dr. Branko-Matjaž Jurič: Reviewer for Performance Evaluation.

Assoc. Prof. Dr. Marjan Heričko, Reviewer for Uporabna informatika. Asst. Prof. Dr. Branko-Matjaž Jurič:

Asst. Prof. Dr. Branko-Matjaž Jurič: Program committee member, international conference, SCI'2003: World multiconference on systemics, cybernetics and informatics, Orlando, Florida, USA, Jul. 27-30 2003.

GUESTS AND VISITORS

Javier Berlinches Casanova Study visit through the Socrates - Erasmus (Rovira i Virgili University, Taragona, programme, research work, Feb. 6 to May 6, 2003. Spain):

Antonio Martinez de Castro Study visit through the Socrates - Erasmus (Rovira i Virgili University, Taragona, programme, research work, Feb. 10 to June 10, Spain): 2003.

Bran Selic Invited lecture on the conference OTS'2003, visit, (IBM Rational software Canada, June 16–22, 2003. (undefined), Canada):

Jose Luis Sanches de la Rosa, Scientific cooperation, formal call, Oct. 15–19, Lorenzo Moreno Ruiz 2003. (University of La Laguna, Tenerife, La Laguna, Spain): Database Technologies Laboratory IN - 19

DATABASE TECHNOLOGIES LABORATORY

Head: Assoc. Prof. Dr. Tatjana Welzer Družovec Phone: +386 2 235 51 30 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

CRP-OEDSDM Optimalno izkoriščanje podatkovnih virov pri podatkovnem rudarjenju (Optimal explotation of data sources for data mining) Leader: Assoc. Prof. Dr. Tatjana Welzer Družovec Participants: Dr. Izidor Golob, Dr. Boštjan Brumen, Prof. Emeritus Dr. Bruno Stiglic, Asst. Prof. Dr. Marjan Družovec, Asst. Prof. Dr. Tomaž Mohorič Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Ministry of the Information Society

The optimal exploitation of data resources for data mining is the problem we are addressing within the research area of GRID technology. Data mining is one of the most important research areas for knowledge discovery. Data mining is defined as »nontrivial identification process of valid, new, potentially applicable, and in the final phase, understandable patterns in data«. The knowledge discovery process is a combination of machine learning, statistics, artificial intelligence, and recently distributed computing (and many other areas). Databases or data resources are required for successful knowledge discovery. Data resources are mostly distributed; it is the required integration of data resources into one (virtual) data resource, from which data mining application take data, process it and try to find patterns. In the project we will use new technologies for the optimal usage of available data for development of a predictive model to satisfy users' expectations and needs. IN - 20 Database Technologies Laboratory

Research and development projects

TMIKT-ItTk Tehnološka mreža Informacijsko komunikacijske tehnologije (Technology network of information-communications technology) Leader: Prof. Dr. Ivan Rozman Participants: Assoc. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Assoc. Prof. Dr. Tatjana Welzer Družovec; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Aleš Živkovič, MSc; Davor Bonačić, MSc; Boštjan Kežmah, MSc; Andrej Bregar, MSc; Tomislav Rozman; Gregor Polančič; Katja Harej; Simon Beloglavec; Regina Stajnko; Boštjan Šumak; Maja Pušnik; Miha Strehar; Boris Lahovnik Project partners: Faculty for Electrical Engineering in cooperation with companies and institutions - network members, Institute for Economic Research The vision of the technology network originates from the recognizable common benefits of network members, and from the indicated opportunities in the field of information- communications technologies. The major advantages are related to the predicted high growth rates in certain areas of information-communications technologies usage, and with faster economic growth in the states of Central and South-eastern Europe. The key goals of the technology network are development of new technologies, services and contents aimed at reaching higher added value, introduction of an innovatory development environment, generation of new knowledge contributed to network member organizations, and a positive influence in other economic areas.

MEVSVKID Metodologija enotnega vzpostavljanja sistemov vodenja kakovosti v informacijski družbi (Methodology for Unified Quality Management System Establishment in Information Society) Leader: Asst. Prof. Dr. Romana Vajde Horvat Participants: Asst. Prof. Dr. Romana Vajde Horvat, Prof. Dr. Ivan Rozman, Katja Harej, Tomislav Rozman, Gregor Polančič, Boris Lahovnik Financed by: Ministry of the Information Society, Ministry of Education, Science and Sport of the Republic of Slovenia

The goal of this project is the development of the unified methodology for quality management system (QMS) establishment in organizations. The methodology should be applicable for all sizes and types of organizations (also for software development organizations). The project is divided into two phases. Database Technologies Laboratory IN - 21

Knowledge gathering and analysis of existing models was performed within the first phase. Models for process management, process modelling, quality management systems and resource management were studied and common characteristics were defined. In the second phase the methodology for a quality management system establishment is being developed, using the information provided within the first phase. This methodology provides optimal definition and documentation of the processes. It also considers the involvement of personnel and required training for efficient QMS establishment.

International projects

DaMiMTa Data Mining Methods and Their Application Leader: Assoc. Prof. Dr. Tatjana Welzer Družovec, Jiri Lazansky (Czech Technical University Prague) Participants: Dr. Boštjan Brumen, Dr. Izidor Golob, Jiři Kubalík, Jiǿi Palouš, Aida Kamišalić Project partners: Tehnical university of Prague Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia, Czech Ministry of Education, Youth and Sport

This project is aimed at promoting the existing data mining methods into daily usage in different fields, ranging from individuals to large organisations such as hospitals and governmental agencies. The cooperation between the two institutions (from Slovenia and Czech Republic) enables the access to a variety of data sources and possibility to perform more complex experiments not possible without collaboration. The research contributes to the integration of developed techniques for data mining. Partners will work on the applications of data mining methods in various areas; especially in medical information systems. The aim is to promote the sharing and dissemination of information and state-of-the-art on current data mining and knowledge discovery methods. The goal is to incorporate the research results into the daily usage.

V-PPSPDIE Valeurtech - Highlitighting professional experience in Europe in undergraduate curricula Leader: Jacques Fleck (I.U.T. Robert Schuman) Participants: Assoc. Prof. Dr. Tatjana Welzer Družovec, Dr. Boštjan Brumen, Regina Stajnko, Aida Kamišalić Financed by: European Union IN - 22 Database Technologies Laboratory

Participants in this project have a task to coordinate Slovenian partners in their execution of the student's industrial placements abroad programme. First of all a survey will be developed and carried out within the project. Then, the survey will cover the involved enterprises. An Internet Web page will be developed, containing all the data for the partners involved as well as for the coordinator's needs. The survey's results will be analyses. Based on the survey's results, the criteria for the evaluation of the students' results and progress through industrial placements and for international recognition will be developed.

Completed research projects 2003

International project

TEAMWork IST- Technology Exploatation and Adaptable Methodologies 2000-28162 offering new Organisational Models and Practices for e-Working Teams Participants: Prof. Dr. Ivan Rozman, Asst. Prof. Dr. Romana Vajde Horvat, Assoc. Prof. Dr. Tatjana Welzer Družovec, Gregor Polančič, Tomislav Rozman, Regina Stajnko, Dr. Boštjan Brumen, Katja Harej Financed by: European Union

Duration: July 2001 to Mar. 2003

- Evaluation of business analysis methodology BestregIT. - Evaluation and improvement of document flow modelling method NQA, - Improvement of existing software for document flow management in an organization (NGA system) - Modelling of Socrates Programme document flow support The NQA and BESTREGIT methodology were tested and reviewed by Institute of Informatics. Reviews were based on the usage of NQA and BESTREGIT for modelling and automatization of Socrates Erasmus student exchange program.Using BESTREGIT and NQA: - Roles, involved in SE were defined, - Document flow of SE student exchange was defined, - Document flow was implemented in NQA, - The review report was produced for NQA and BESTREGIT. Database Technologies Laboratory IN - 23

PUBLICATIONS

Boštjan Brumen, Izidor Golob, Tatjana Welzer-Družovec, Marjan Družovec, Hannu Jaakkola, “Postopek ocenitve napake klasifikacijskih algoritmov,” Electrotechnical Review, Vol. 70, No. 1/2, pp. 34-39, 2003.

Boštjan Brumen, Izidor Golob, Tatjana Welzer-Družovec, Ivan Rozman, Marjan Družovec, Hannu Jaakkola, “An algorithm for protecting knowledge discovery data,” Informatica, Vol. 14, No. 3, pp. 277-288, 2003.

Izidor Golob, Tatjana Welzer-Družovec, Boštjan Brumen, “Analiza in primerjava pristopov pri gradnji podatkovnih skladišč,” Uporab. inform. (Ljubl.), Vol. 11, No. 1, pp. 12-22, 2003.

Matjaž Jaušovec, Boštjan Brumen, Tatjana Welzer-Družovec, “Analiza varnostne ogroženosti,” Uporab. inform. (Ljubl.), Vol. 11, No. 2, pp. 61-67, 2003.

Jasmin Malkić, Tatjana Welzer-Družovec, Boštjan Brumen, “Učinkovitost kriptografskih funkcij v spletnih aplikacijah,” Uporab. inform. (Ljubl.), Vol. 11, No. 4, pp. 173-179, 2003.

Petra Povalej, Mitja Lenič, Tatjana Welzer-Družovec, Marjan Družovec, Peter Kokol, “Multi- agent construction of hybrid intelligent systems,” Informacijska družba IS 2003, Ljubljana, Slovenia, Oct. 2003, A, pp. 117-120.

Boštjan Brumen, Izidor Golob, Tatjana Welzer-Družovec, Hannu Jaakkola, Jiřy Palouš, “On estimation of learning capability,” IEEE International conference on computational cybernetics [also] ICCC 2003, Siófok, Hungary, Aug. 2003.

Izidor Golob, Tatjana Welzer-Družovec, Boštjan Brumen, “Koncept podatka pri raziskovanju kakovosti podatkov v podatkovnih bazah,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 349-352.

CONGRESSES, MEETINGS, AND COMMITTEES

Assoc. Prof. Dr. Tatjana Welzer Programme committee member, expert Družovec: consultation, 10th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 16–18, 2003.

Assoc. Prof. Dr. Tatjana Welzer Section chair of Information Technologies and Družovec: Internet, expert consultation, 10th Conference Days of Slovenian Informatics, Portorož, Slovenia, Apr. 16–18, 2003. IN - 24 Database Technologies Laboratory

Assoc. Prof. Dr. Tatjana Welzer Programme committee member, international Družovec: conference, 6th International Conference on Information Systems Implementation and Modelling, Brno, Czech Republic, Apr. 28–30, 2003.

Assoc. Prof. Dr. Tatjana Welzer Organising committee member, international Družovec, conference, The 15th Conference On Advanced Dr. Boštjan Brumen: Information Systems Engineering, Klagenfurt, Austria, June 16–20, 2003.

Assoc. Prof. Dr. Tatjana Welzer Programme committee member, international Družovec: workshop, Web Based Collaboration, Praga, Czech Republic, Sept. 1–5, 2003.

Assoc. Prof. Dr. Tatjana Welzer Programme committee member, international Družovec: conference, Advances in Databases and Information Systems, Dresden, Germany, Sept. 3– 6, 2003.

Aleš Vrabič: OTS'2003 Object technology in Slovenia, conference, organisation and implementation, Maribor, Slovenia, June 18–19, 2003.

VISITS TO OTHER INSTITUTIONS

Assoc. Prof. Dr. Tatjana Welzer Visit through the Valeurtech project, formal call, Družovec: Heraklion, Greece, Jan. 21–26, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Valeurtech project, member of Družovec: expert group, formal call, Newcastle, United Kingdom, April 27 to May 1, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Valeurtech project, member of Družovec: expert group, formal call, Edinburgh, United Kingdom, May 1–3, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Socrates - Erasmus program, Družovec: formal call, Athen, Greece, May 23–25, 2003. Database Technologies Laboratory IN - 25

Assoc. Prof. Dr. Tatjana Welzer Visit through the IFIP TC 11 program, Družovec: representative of Slovenia, formal call, Athen, Greece, May 23–25, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Socrates - Erasmus program, Družovec: formal call, Vaasa, Finland, June 1–4, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Socrates - Erasmus program, Družovec: formal call, Tampere, Finland, June 4–8, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Socrates - Erasmus program, Družovec: formal call, Pori, Finland, June 8–10, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the CAiSE 2003 conference, formal Družovec: call, Klagenfurt, Austria, June 16–20, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Socrates - Erasmus program, Družovec: formal call, Tarragona, Spain, July 11–17, 2003.

Aleš Vrabič: Visit through the MS SQL Server 2000 Summer Academy, visit, Dubrovnik, Croatia, July 14–16, 2003.

Dr. Izidor Golob, Visit through the DaMiMTa project, formal call, Assoc. Prof. Dr. Tatjana Welzer Prague, Czech Republic, Aug. 27 to Sept. 2, 2003. Družovec:

Assoc. Prof. Dr. Tatjana Welzer Visit with the intention of preparing the bilateral Družovec: project, London, United Kingdom, Sept. 29 to Oct. 1, 2003.

Assoc. Prof. Dr. Tatjana Welzer Visit through the Valeurtech project, member of Družovec: expert group, formal call, Newcastle, United Kingdom, Oct. 2–5, 2003.

GUESTS AND VISITORS

Liisa Saikunen Study visit through the Socrates - Erasmus (Tampere University of Technology, program, research work, Jan. 1 to June 30, 2003. Tampere, Finland), IN - 26 Database Technologies Laboratory

Juha Luopa (University of Vaasa, Vaasa, Finland):

Hannu Jaakkola Working visit through the Socrates - Erasmus (Tampere University of Technology, program, formal call, Jan. 26–31, 2003. Tampere, Finland):

Javier Berlinches Casanova Study visit through the Socrates - Erasmus (Rovira i Virgili University, Taragona, program, preparation of final grade project, Spain): research work, Feb. 6 to May 6, 2003.

Benjamin Lesenfans, Study visit through the Socrates - Erasmus Nicolas Noe, program, preparation of final grade project, Vincent Loeckx research work, Feb. 10 to June 6, 2003. (Haute École Rennwquin Sualem, Liege, Belgium):

Viorel Popa Visit through the Valeurtech project, formal call, (University of Galati, Galati, Romania), Mar. 23–30, 2003. Dominique Mazard (IUT Consultant, Montrouge, France), Karli Ruh, Joseph Barsics (Haute École Rennwquin Sualem, Liege, Belgium):

Joseph Barsics Working visit through the Socrates - Erasmus (Haute École Rennwquin Sualem, program, formal call, Mar. 27, 2003. Liege, Belgium):

Hannu Jaakkola Working visit, scientific collaboration, July 22–27, (Tampere University of Technology, 2003. Tampere, Finland):

Jose Luis Sanches de la Rosa, Visit through the Socrates - Erasmus project, Lorenzo Moreno Ruiz research work, Oct. 15–19, 2003. (University of La Laguna, Tenerife, La Laguna, Spain):

Lenka Novakova Visit through a bilateral project, formal call, Nov. (Czech Technical University of Prague, 27–30, 2003. Prague, Czech Republic): Database Technologies Laboratory IN - 27

DECORATIONS, AWARDS, AND HONOURS

Petra Grm, Marko Hölbl: 1st place for a student article, under the mentorship of Assoc. Prof. dr. Tatjana Welzer Družovec and Boštjan Brumen, Ljubljana, Slovenia, Apr. 18, 2003.

Petra Grm, Marko Hölbl: honour for student research work, under mentorship of Assoc. Prof. dr. Tatjana Welzer Družovec and Boštjan Brumen, Maribor, Slovenia, Oct. 27, 2003. IN - 28 Computer Mediated Communication Laboratory

COMPUTER MEDIATED COMMUNICATION LABORATORY

Head: Prof. Dr. Jozsef Györkös Phone: +386 2 235 51 25 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Research and development projects

TMIKT-ItTk Tehnološka mreža Informacijsko komunikacijske tehnologije (Technology network of information-communications technology) Participants: Prof. Dr. Ivan Rozman, Assoc. Prof. Dr. Marjan Heričko; Assoc. Prof. Dr. Bojan Novak; Assoc. Prof. Dr. Tatjana Welzer Družovec; Asst. Prof. Dr. Romana Vajde Horvat; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Vili Podgorelec; Aleš Živkovič, MSc; Davor Bonačić, MSc; Boštjan Kežmah, MSc; Andrej Bregar, MSc; Tomislav Rozman; Gregor Polančič; Katja Harej; Simon Beloglavec; Regina Stajnko; Boštjan Šumak; Maja Pušnik; Miha Strehar; Boris Lahovnik Project partners: Faculty for Electrical Engineering in cooperation with companies and institutions - network members, Institute for Economic Research The vision of the technology network originates from the recognizable common benefits of network members, and from the indicated opportunities in the field of information- communications technologies. The major advantages are related with the predicted high growth rates in certain areas of information-communications technologies usage, and with faster economic growth in the states of Central and South-eastern Europe. The key goals of the technology network are development of new technologies, services and contents aimed at reaching higher added value, introduction of an innovatory development environment, generation of new knowledge contributed to network member organizations, and a positive Computer Mediated Communication Laboratory IN - 29

influence on other economic areas.

Industrial projects

TPS COBISS Tehnološka prenova sistema COBISS (Technological Reengineering of COBISS System) Participants: Prof. Dr. Ivan Rozman; Assoc. Prof. Dr. Marjan Heričko; Asst. Prof. Dr. Branko-Matjaž Jurič; Asst. Prof. Dr. Romana Vajde Horvat; Aleš Živkovič, MSc; Simon Beloglavec; Boštjan Kežmah, MSc; Boštjan Šumak; Miha Strehar; Maja Pušnik; Katja Harej; Gregor Polančič; Tomislav Rozman; Boris Lahovnik Financed by: IZUM

Institute of Informatics ensures advisement services, object technology education and qualifications and quality for the needs of COBISS information system reengineering respectively COBISS 3 information system reengineering, with the emphasis on information system development based on the Java platform and XML technologies, web services, distributed object architectures, unified modelling language (UML), and object process models. Other more important goals of collaboration are creating standard procedure and reestablishment of quality management system. In the project, the Institute of Informatics has researched certain parts of the remote method evocation security in more detail and searched for suitable solutions through the pilot solutions development.

PUBLICATIONS

Andrej Bregar, József Györkös, Ivan Rozman, “An alternative sorting procedure for interactive group decision support based on the pseudo-criterion concept,” Journal of systemics, cybernetics and informatics, 2003.

Andrej Bregar, József Györkös, Ivan Rozman, Matjaž B. Jurič, Marjan Heričko, “Pseudo- criterion based group consensus seeking,” 2003 Americas conference on information systems [also] AMCIS 2003, Tampa, Florida, USA, Aug. 2003, pp. 2293-2301.

Andrej Bregar, “Iskanje skupinskega konsenza s sortiranjem alternativ na osnovi koncepta psevdo kriterija,” Slovenska informatika za tretje tisočletje: v družbi najrazvitejših: zbornik posvetovanja, Dnevi slovenske informatike, Portorož, Slovenia, Apr. 2003, pp. 395-401.

Andrej Bregar, József Györkös, “Semiautomatic determination of criteria weights according to veto thresholds in the case of the localized alternative sorting analysis,” 7th International IN - 30 Computer Mediated Communication Laboratory

Symposium on Operational Research in Slovenia, Podčetrtek, Slovenia, Sep. 2003, pp. 267- 274.

Andrej Bregar, József Györkös, Ivan Rozman, “An alternative sorting procedure for interactive group decision support based on the pseudo-criterion concept,” 7th World Multiconference on Systemics, Cybernetics and Informatics [also] SCI 2003, Orlando, Florida, USA, Jul. 2003, pp. 353-358.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Jozsef Györkös: Programme committee member, conference, Object Technology in Slovenia, Maribor, Slovenia, June 18–19, 2003.

Prof. Dr. Jozsef Györkös: Programme committee member, conference, Development and reingeneering of information system, Ljubljana, Slovenia, Oct. 13–17, 2003.

Prof. Dr. Jozsef Györkös: Vice-chairman, international conference, Information Society 2002, Ljubljana, Slovenia, Nov. 13–17, 2003.

Boris Lahovnik: OTS'2003 Object technology in Slovenia, conference, organisation and implementation, Maribor, Slovenia, June 18–19, 2003.

DECORATIONS, AWARDS, AND HONOURS

Andrej Bregar, MSc, Prof. Dr. Jozsef Györkös, Prof. Dr. Ivan Rozman: honour for the best paper in the session Management Information Systems on the SCI 2003 Conference, Orlando, Florida, USA, July 30, 2003.

Andrej Bregar, MSc, Prof. Dr. Jozsef Györkös, Prof. Dr. Ivan Rozman, Asst. Prof. Dr. Branko-Matjaž Jurič, Assoc. Prof. Dr. Marjan Heričko: best Paper Award in the Decision Support and Knowledge Management Track on the AMCIS 2003 Conference, Tampa, Florida, USA, Aug. 5, 2003.

Andrej Bregar, MSc: faculty Honour for the best papers on the conferences AMCIS 2003 and SCI 2003, Maribor, Slovenia, Nov. 27, 2003. Real-Time Systems Laboratory IN - 31

REAL-TIME SYSTEMS LABORATORY

Head: Prof. Dr. Matjaž Colnarič Phone: +386 2 220 74 30 E-mail: [email protected]

RESEARCH PROJECTS

Current research projects

Basic research project

Z2-3493-0796 Celostno snovanje vgrajenih krmilnih sistemov (Holistic Embedded Control Systems Design) Leader: Dr. Roman Gumzej Financed by: Ministry of Education, Science and Sport of the Republic of Slovenia

In the past research year the work was mainly devoted to the realisation of concepts from the previous research year. The final picture of the integral environment, based on the Specification PEARL methodology, became clear through the realisation of individual components. The concepts of HW/SW architecture co-design and specification have been integrated within the concepts of temporal feasibility verification by co-simulation. The RTOS concept is based on the PEARL standard (DIN 66253, Parts 1 and 2), which defines the task model with the system calls to manage them as well as for inter-task synchronisation and communication. The concepts of inter-task communication in a distributed environment as well as dynamical reconfiguration of the programme part due to the changes of processing unit's state have been included in the concept of the configuration manager (CMM). These concepts are parts of the Specification PEARL methodology and are based on a feature from the standard Multiprocessor PEARL (DIN 66253, Part 3). Currently the integration of the following tools is underway: (1) GEdit - archiecture and programme task design tool represents a unified interface for target code generation and co-simulation; (2) CMM – configuration manager. Two implementation variants are foreseen: (i) for target platform implementation and (ii) for the simulation environment; (3) GSim – simulation environment for the evaluation of temporal feasibility. It is foreseen that the integration phase will end in May 2004. The project deadline is in July 2004. Any residual time will be used for module and IN - 32 Real-Time Systems Laboratory

integration testing. The ideas, which emerged from the project, have been presented in international scientific meetings and conferences in the organisation of IFAC, IFIP, IEEE, IEE in Montreal (Canada), Zielona Gora (Poland) in Porto (Portugal) and in the PEARL-News journal published by the VDI GI 4.4.2 (Germany). The feedback from scientific and technical circles was very good.

Applied projects

L2-3446-0796 Zanesljivost vgrajenih krmilnih sistemov (Dependability of Embedded Control Systems) Leader: Asst. Prof. Dr. Domen Verber Participants: Aleksander Polutnik, MSc; Bor Prihavec Financed by: ULTRA Company, Ministry of Education, Science and Sport of the Republic of Slovenia

In this year an experimental multiprocessor control system was implemented together with supporting system software. The system supports the survival of the application even in the case of a total failure of one of the processing nodes and/or partial failure of the communication channels. In such cases the system automatically reconfigures itself and rearranges the remaining resources for the completion of given tasks.

International projects

IST-2001-32122 IFATIS - Intelligent Fault Tolerant Control in Integrated Systems, WP4: Fault Tolerance in Computer Systems Leader: Steven X Ding (University Duisburg - Essen, The Gerhard Mercator University), Prof. Dr. Matjaž Colnarič Participants: Asst. Prof. Dr. Domen Verber, Dr. Matej Šprogar, Dr. Roman Gumzej, Stanislav Moraus, Bojan Hadjar, Rok Ostrovršnik, Milan Čurkovič Project partners: Department of Electronics, Computer Science and Systems, University of Bologna, Universita degli Studi di Roma "La Sapienza", Université Libre de Bruxelles, Centre de Recherche en Automatique de Nancy, Universite Henri Poincare Nancy 1, University Duisburg - Essen, The Gerhard Mercator University, Yorkshire Water Services Limited, TNI, Robert Bosch Gmbh, Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E.V. Real-Time Systems Laboratory IN - 33

Financed by: European Union

In the year 2003 the major goal of the project was to establish a framework of intelligent fault- tolerant control (FTC) technology, which provides control engineers and scientists with advanced methods to approach FTC problems in complex control systems in a systematic way. It makes a basis for the future development of user-specified FTC tools and systems in all kinds of industrial sectors. The second goal of the project is the development of a novel methodology and a software tool (IFATIS tool) for the integrated design of the real time, multilevel FTC systems. The IFATIS tool will be platform independent and constructed in two levels. The main project goals of the laboratory were achieved successfully and on-time; the produced solutions were presented to project partners on a project meeting in September in Maribor.

PUBLICATIONS

Matjaž Colnarič, Domen Verber, Wolfgang A. Halang, “Improving integrity of embedded computers in control,” Annu. rev. control, Vol. 27, No. 1, pp. 47-54, 2003.

Matjaž Colnarič, Domen Verber, Stanislav Moraus, “Design of peripheral interfaces for improved toleranceto faults,” IAR Annual meeting 2003, Duisburg, Germany, Nov. 2003, pp. 131-136.

Roman Gumzej, Matjaž Colnarič, “The representation of PEARL tasks as timed state transition diagrams,” 27th IFAC/IFIP/IEEE Workshop on real time programming, WRTP'03, Łagów, Poland, May 2003, pp. 97-102.

Roman Gumzej, Wolfgang A. Halang, “A configuration manager for embedded real-time applications,” Co-design for embedded real-time systems (CERTS'03), 2003.

Shourong Lu, Wolfgang A. Halang, Roman Gumzej, “Towards a comprehensive environment for the engineering of embedded control systems based on UML,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 693-698.

Rok Ostrovršnik, Aleš Hace, Martin Terbuc, “Use of open source software for hard real-time experiments,” International conference on industrial technology [also] IEEE ICIT 2003, Hotel Habakuk Maribor, Slovenia, Dec. 2003, pp. 1243-1246.

Matej Šprogar, “Objektno ogrodje za genetsko programiranje,” The 12th Electrotechnical and Computer Science Conference ERK 2003, Ljubljana, Slovenia, Sep. 2003, pp. 501-504. IN - 34 Real-Time Systems Laboratory

Matej Šprogar, Matjaž Colnarič, “Agent-oriented framework for decision tree evolution,” IEEE/WIC International Conference on Intelligent agent technology (IAT 2003), Halifax, Canada, Oct. 2003, pp. 503-506.

Domen Verber, Matjaž Colnarič, “Communication platform for distributed fault-tolerant control systems,” 27th IFAC/IFIP/IEEE Workshop on real time programming, WRTP'03, Łagów, Poland, May 2003, pp. 161-166.

Domen Verber, Matjaž Colnarič, “Integrated fault-tolerant communication platform for embedded control systems,” ICOM 2003, International conference on Mechatronics, 2003, pp. 197-202.

Domen Verber, Matjaž Colnarič, “Issues in the implementation of a fault-toleranthardware platform,” SAFEPROCESS 2003: 5th IFAC Symposium on fault detection, supervision and safety of technical processes, Washington, D.C., USA, Jun. 2003, pp. 561-566.

Domen Verber, Matjaž Colnarič, Bojan Hadjar, “System support and diagnostics using time- triggered CAN protocol,” IAR Annual meeting 2003, Duisburg, Germany, Nov. 2003, pp. 137- 141.

Matjaž Colnarič, Wolfgang A. Halang, “Computer techniques and applications for real-time embedded control in mechatronic systems,” Computer aided and integrated manufacturing systems: a5-Volume Set. Vol. 5, Manufacturing processes, Cornelius T. Leondes, ur., 2003, pp. 199-231.

CONGRESSES, MEETINGS, AND COMMITTEES

Prof. Dr. Matjaž Colnarič: Member of strategic board, member of technical board, meeting, IFAC Technical Committee on Computers and Control, Madrid, Spain, Jan. 1 to Dec. 31, 2003.

Prof. Dr. Matjaž Colnarič: Member of strategic board, member of the committee for scientifical publishing and meetings, meeting, MŠZŠ commision, science department sector, Ljubljana, Slovenia, Jan. 1 to Dec. 31, 2003.

Prof. Dr. Matjaž Colnarič: Programme committee chairman, workshop, 27th IFAC/IFIP/IEEE Workshop on Real-Time Programming, Zielona Gora, Poland, May 14–17, 2003. Real-Time Systems Laboratory IN - 35

Prof. Dr. Matjaž Colnarič: Programme committee member, conference, Object Technology in Slovenia, Maribor, Slovenia, June 18–19, 2003.

Prof. Dr. Matjaž Colnarič: Co-ordinated organisation and implementation, meeting, Working meeting for the IFATIS project, Maribor, Slovenia, Sept. 25–26, 2003.

Prof. Dr. Matjaž Colnarič: Reviewer, international conference, IEEE International Conference on Industrial Technology, Maribor, Slovenia, Dec. 10–12, 2003.

Prof. Dr. Matjaž Colnarič: Reviewer for Journal of Computing and Information Technology, editorial board member.

Prof. Dr. Matjaž Colnarič: Reviewer for Real-Time Systems, The International Journal of Time-Critical Computing Systems, associate editor.

VISITS TO OTHER INSTITUTIONS

Rok Ostrovršnik, Education for the IFATIS project, seminar Asst. Prof. Dr. Domen Verber: participation, Nancy, France, Jan. 16–17, 2003.

Prof. Dr. Matjaž Colnarič, Working meeting for the IFATIS project, project Bojan Hadjar, meeting participation, Bertinoro, Italy, Mar. 7 to Apr. Rok Ostrovršnik, 7, 2003. Asst. Prof. Dr. Domen Verber:

Prof. Dr. Matjaž Colnarič: Consortium meeting for the EU FP6 EvoTest project proposal, formal call, Valencia, Spain, Oct. 13, 2003.

Prof. Dr. Matjaž Colnarič, Working meeting for the IFATIS project, meeting Bojan Hadjar, participation, Duisburg, Germany, Nov. 25–27, Stanislav Moraus, 2003. Rok Ostrovršnik, Asst. Prof. Dr. Domen Verber:

Prof. Dr. Matjaž Colnarič: Working meeting for the IFATIS project, project IN - 36 Real-Time Systems Laboratory

meeting participation, Rome, Italy, Dec. 4, 2003.

GUESTS AND VISITORS

Wolfgang A. Halang Visit and invited lecture from the field of real-time (Fernuniversitaet Hagen, Hagen, systems, visit, Oct. 12 to Dec. 12, 2003. Germany):

Peter Neumann Scientific collaboration, visit, Oct. 12 to Dec. 12, (Insitut fur Automation und 2003. Kommunikation e.V. Magdeburg, Barleben, Germany):

Institute of Media Communications MC – 1

INSTITUTE OF MEDIA COMMUNICATIONS

Head: Assoc. Prof. Dr. Tatjana Welzer Družovec Phone: +386 2 235 51 30 E-mail: [email protected] URL: http://www.in.feri.uni-mb.si

The main goal of the undergraduate Media Communication Studies is to graduate students who have a grasp of interdisciplinary knowledge from the areas of radio- and TV-production, information systems and graphical communication.

The program is distinctly multidisciplinary designed and provides the students with all the technological and organizational knowledge they need for their professional work and further professional development. Having in mind the development of press- and electronic-media in the future, the university level of studies in Media Communication provides the foundation not only for performing work in radio, TV and production houses, but prepares students for a career in marketing companies, in interactive media publishing companies, in Internet-service providers, in industry, especially in developing company marketing material and selling products or services on the Internet. In the first years of studies the emphasis is given on the theoretical part, while the practical work is carried out in the final years.

The program has been developed carefully, taking into account the development in the disciplines, covered by the program, considering the specifics of the Slovenia and the region. The curriculum is harmonized with similar programs from all over the world.

The knowledge, gained through leading and carrying out various projects by the institution members in the above mentioned areas, is therefore directly incorporated into the educational process.

Institute of Telecommunications TC – 1

INSTITUTE OF TELECOMMUNICATIONS

Head: Prof. Dr. Bogomir Horvat Phone: +386 2 220 72 00 E-mail: [email protected] URL: http://www.elektronika.uni-mb.si

The Faculty of Electrical Engineering and Computer Science, University of Maribor, started the academic-degree study program in Telecommunications in the academic year 2001/2002. The program has been prepared within the Institute of Electronics. In order to ensure a teaching and research base for this new academic-degree program and the existing study option of Telecommunications within the professional higher education program in Electrical Engineering, we set up the Institute of Telecommunications. It is still in the formation phase. The research and development work in the field of telecommunications has been carried out by many members already in the framework of the Institute of Electronics, wherefrom comes the majority of teachers for the new program. In 2003, they were active in development of concurrent telecommunication services and protocol stacks and in transfer of these results to the next generation networks in the Slovene telecommunication industry. These activities are described in the section, where the Institute of Electronics is presented.