Proceedings of the Eleventh International Conference on Informatics '11 INFORMATICS '11 i 2011 Editors i Valerie Novitzká Štefan Hudák General sponsor Sponsors Organized by: Slovak Society for Applied Cybernetics and Informatics Faculty of Electrical Engineering and Informatics, Technical University of Košice ISBN 978-80-89284-94-8 ČOV A TA IN ČÍ F O O P R M A A R T D I K E Y T A F K November 16-18, 2011 E I H T C U A I V C I Š K Rožňava, Slovakia O informatics 2011 informatics 2011 Proceedings of the Eleventh International Conference on Informatics INFORMATICS 2011 Editors Valerie Novitzká Štefan Hudák International Scientifi c Conference INFORMATICS 2011, November 16-18, 2011, Rožňava, Slovakia Proceedings of the Eleventh International Conference on Informatics INFORMATICS’2011 Rožňava, Slovakia, November 16-18, 2011 Editors Valerie Novitzká Štefan Hudák Technical University of Košice Košice, Slovakia Organized by Slovak Society for Applied Cybernetics and Informatics and Faculty of Electrical Engineering and Informatics, Technical University of Košice Partners Central European Journal of Computer Science Acta Electrotechnica et Informatica Copyright © Department of Computers and Informatics, FEEI TU of Košice, 2011 Department of Computers and Informatics Faculty of Electrical Engineering and Informatics Technical University of Košice Letná 9, 042 00 Košice, Slovakia Phone: +421-55-63 353 13 Fax: +421-55-602 2746 URL http://kpi.fei.tuke.sk ISBN 978-80-89284-94-8 International Scientifi c Conference INFORMATICS 2011, November 16-18, 2011, Rožňava, Slovakia GENERAL CHAIR Liberios Vokorokos, Dean of Faculty of Electrical Engineering and Informatics, Technical University of Košice, Slovakia HONORARY COMMITTEE Ivan Plander, Slovak Society for Applied Cybernetics and Informatics Bratislava, Slovakia PROGRAMME CHAIRS Valerie Novitzká, Technical University of Košice, Slovakia Štefan Hudák, Technical University of Košice, Slovakia PROGRAMME COMMITEE Mikuláš Alexík, University of Žilina, Slovakia Igor Bandurič, University of Economics in Bratislava, Slovakia Andreas Bollin, University of Klagenfurt, Austria Dmitriy B. Buy, National University of Taras Shevchenko, Ukraine Svetlana Cicmil, University of the West England, Great Britain František Čapkovič, Slovak Academy of Sciences, Slovakia Maciej Czyżak, Gdansk University of Technology, Poland Erik Duval, Katholieke Universiteit Leuven, Belgium Gianina Gábor, University of Oradea, Romania Buchaev Yakhua Gamidovich, Dagestan State Institute of National Economy, Russia Elena Gramatová, Slovak University of Technology, Slovakia Andrzej Grzybowski, Częstochowa University of Technology, Poland Klaus Haenssgen, Leipzig University of Applied Sciences, Germany Aboul Ella Hassanien, Cairo University, Egypt Zdeněk Havlice, Technical University of Košice, Slovakia Pedro Rangel Henriques, University of Minho, Portugal Ladislav Hluchý, Slovak Academy of Sciences, Slovakia Zoltán Horváth, Lóránd Eötvös University, Hungary Ladislav Hudec, Slovak University of Technology, Slovakia František Jakab, Technical University of Košice, Slovakia Zoltán Kása, Sapientia University, Romania Jozef Kelemen, VSM School of Management, Slovakia Milan Kolesár, Slovak University of Technology, Slovakia Jiří Kunovský, Brno University of Technology, Czech Republic Vladimír Kvasnička, Slovak University of Technology, Slovakia Mária Lucká, University of Trnava, Slovakia Ivan Luković, University of Novi Sad, Serbia Karol Matiaško, University of Žilina, Slovakia Marjan Mernik, University of Maribor, Slovenia Ľudovít Molnár, Slovak University of Technology, Slovakia Igor Mokriš, Slovak Academy of Sciences, Slovakia Hanspeter Mössenböck, Johannes Kepler University Linz, Austria Hiroshi Nakano, Kumamoto University, Japan Mykola S. Nikitchenko, National University of Taras Shevchenko, Ukraine Rinus Plasmeijer, Radboud University Nijmegen, Netherlands Jaroslav Porubän, Technical University of Košice, Slovakia Stanislav Racek, University of West Bohemia, Czech Republic Imre J. Rudas, Óbuda University, Hungary Gábor Sági, Hungarian Academy of Sciences, Hungary Abdel-Badeeh M. Salem, Ain Shams University, Egypt Ladislav Samuelis, Technical University of Košice, Slovakia Elena Somova, University of Plovdiv, Bulgaria International Scientifi c Conference INFORMATICS 2011, November 16-18, 2011, Rožňava, Slovakia Jiří Šafařík, University of West Bohemia, Czech Republic Petr Šaloun, University of Ostrava, Czech Republic Miroslav Šnorek, Czech Technical University in Prague, Czech Republic Milan Šujanský, Technical University of Košice, Slovakia Georgiy O. Tseytlin, Ukrainian Academy of Sciences, Ukraine Tsuyoshi Usagawa, Kumamoto University, Japan Neven Vrček, University of Zagreb, Croatia František Zbořil, Brno University of Technology, Czech Republic Jaroslav Zendulka, Brno University of Technology, Czech Republic Doina Zmaranda, University of Oradea, Romania ORGANIZING COMMITTEE Milan Šujanský (chair) Juraj Giertl Katarína Kleinová Štefan Korečko Viliam Slodičák Csaba Szabó Martina Ľaľová Pavol Macko Technical University of Košice, Slovakia International Scientifi c Conference INFORMATICS 2011, November 16-18, 2011, Rožňava, Slovakia PREFACE The eleventh event of the international scientific conference Informatics 2011 is an international forum for presenting the original research results, for sharing the experience and to exchange the ideas transferring from theoretical concepts into real-life domains by scientist and experts working in computer science and informatics. It also provides an opportunity for young researchers to demonstrate the achievements and to discuss their results at international scientific forum. The main topics of the conference are as follows: x Computer Architectures x Computer Networks x Theoretical Informatics x Programming Paradigms, Programming Languages x Software Engineering x Distributed Systems x Computer Graphics and Virtual Reality x Artificial Intelligence x Knowledge Management x Information System Research x Applied Informatics and Simulation x Informatization of self-government in the Information Society All submitted papers have been reviewed by two members of the conference Program Committee. The proceedings also contain two invited lectures that were delivered by eminent experts in their respective fields. Selected papers will be reviewed by two independent international reviewers and printed in special issues of the following international scientific journals Acta Electrotechnica et Informatica and Central European Journal of Computer Science. We would like to express our thanks to all the authors, reviewers and, above all, our invited speakers that contributed and guaranteed the high and professional level of the conference. We are very grateful to our sponsors for the financial and material support, too. The eleventh conference event is organized by Slovak Society for Applied Cybernetics and Informatics and the Faculty of Electrical Engineering and Informatics, Technical University of Košice and it is supported and sponsored by Association of Slovak Scientific and Technological Societies. The conference Informatics 2011 is held in Rožňava, the regional capital of Gemer, the region with rich and famous historical and cultural monuments. We are confident that inside these covers you will find relevant papers in the field of your interest. We also look forward to your participation at the next events of the Informatics conference. November 2011 On the behalf of Program and Organizing Committees Valerie Novitzká, Štefan Hudák International Scientifi c Conference INFORMATICS 2011, November 16-18, 2011, Rožňava, Slovakia CONTENTS Invited Talks Pavol Návrat: From Keyword Search Towards Exploratory Information Seeking, And Beyond................................ 9 Jaroslav Zendulka: Mining Moving Object Data ....................................................................................................... 16 Section: Computer Networks and Architectures Ivan Plander: Accelerator-Based Architectures for High-Performance Computing in Science and Engineering ........ 22 Zbigniew Domański: Distribution of Manhattan Distances Between Processors within Two-Dimensional Grids ....... 26 Miloš Očkay, Martin Droppa: Embarrassingly Parallel Problem Processed on Accelerated Multi-Level Parallel Architecture .............................................................................................................................................................. 29 Juraj Giertl, Ľuboš Husivarga, Martin Révés, Adrián Pekár, Peter Feciľak: Measurement of Network Traffic Time Parameters ....................................................................................................................................................... 33 Peter Feciľak, Katarína Kleinová: New Approach to Remote Laboratory in Regard to Topology Change and Self-Repair Feature ................................................................................................................................................... 38 Jindřich Jelínek, Pavel Satrapa, Jiří Fišer: Simulation of Enhanced RADIUS Protocol in Colored Petri Nets .......... 43 Ján Bača, Peter Feciľak: Specification, Validation and Verification of Information Transfer and Processing Systems .................................................................................................................................................................... 48 Section: Theoretical Informatics Ivan Peťko: Composition of High Level Petri Nets...................................................................................................