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Usability of the Sip Protocol Within Smart Home Solutions 4 55 Jakub Hrabovsky - Pavel Segec - Peter Paluch Peter Czimmermann - Stefan Pesko - Jan Cerny Marek Moravcik - Jozef Papan USABILITY OF THE SIP PROTOCOL UNIFORM WORKLOAD DISTRIBUTION WITHIN SMART HOME SOLUTIONS PROBLEMS 13 59 Ivan Cimrak - Katarina Bachrata - Hynek Bachraty Lubos Kucera, Igor Gajdac, Martin Mruzek Iveta Jancigova - Renata Tothova - Martin Busik SIMULATION OF PARAMETERS Martin Slavik - Markus Gusenbauer OBJECT-IN-FLUID FRAMEWORK INFLUENCING THE ELECTRIC VEHICLE IN MODELING OF BLOOD FLOW RANGE IN MICROFLUIDIC CHANNELS 64 21 Peter Pechac - Milan Saga - Ardeshir Guran Jaroslav Janacek - Peter Marton - Matyas Koniorczyk Leszek Radziszewski THE COLUMN GENERATION AND TRAIN IMPLEMENTATION OF MEMETIC CREW SCHEDULING ALGORITHMS INTO STRUCTURAL OPTIMIZATION 28 Martina Blaskova - Rudolf Blasko Stanislaw Borkowski - Joanna Rosak-Szyrocka 70 SEARCHING CORRELATIONS BETWEEN Marek Bruna - Dana Bolibruchova - Petr Prochazka COMMUNICATION AND MOTIVATION NUMERICAL SIMULATION OF MELT FILTRATION PROCESS 36 Michal Varmus - Viliam Lendel - Jakub Soviar Josef Vodak - Milan Kubina 75 SPORTS SPONSORING – PART Radoslav Konar - Marek Patek - Michal Sventek OF CORPORATE STRATEGY NUMERICAL SIMULATION OF RESIDUAL STRESSES AND DISTORTIONS 42 OF T-JOINT WELDING FOR BRIDGE Viliam Lendel - Stefan Hittmar - Wlodzimierz Sroka CONSTRUCTION APPLICATION Eva Siantova IDENTIFICATION OF THE MAIN ASPECTS OF INNOVATION MANAGEMENT 81 AND THE PROBLEMS ARISING Alexander Rengevic – Darina Kumicakova FROM THEIR MISUNDERSTANDING NEW POSSIBILITIES OF ROBOT ARM MOTION SIMULATION 49 Alzbeta Kucharcikova - Lubica Konusikova Emese Tokarcikova 87 APPROACHES TO THE QUANTIFICATION Martin Krajcovic - Andrej Stefanik - Luboslav Dulina OF THE HUMAN CAPITAL EFFICIENCY LOGISTICS PROCESSES AND SYSTEMS IN ENTERPRISES DESIGN USING COMPUTER SIMULATION 95 108 Andrej Czan - Michal Sajgalik - Jozef Holubjak Slavomir Hrcek - Robert Kohar - Stefan Medvecky Marianna Piesova - Tatiana Czanova Branislav Krchnavy - Marcel Caco SIMULATION OF RESIDUAL STRESSES DETERMINATION OF THE OPTIMUM IN SURFACE AND SUBSURFACE LAYER PRELOAD OF ROLLER BEARINGS IN TERMS AFTER MACHINING OF THEIR LIFE USING FEM 101 115 Alzbeta Sapietova - Vladimir Dekys Milan Malcho - Jozef Jandacka - Richard Lenhard USE OF MSC.ADAMS SOFTWARE PRODUCT Stanislav Gavlas - Tadeas Ochodek IN MODELLING VIBRATION SOURCES NUMERICAL SIMULATION OF HEAT TRANSPORT FROM THE ELECTRIC ARC FURNACE TO THE HEAT RECOVERY SYSTEM Dear Readers, It is a great honor for me to write an introduction to this issue of “Communications - Scientific Letters of the University of Zilina”. This is a special edition compiled on the occasion of the 25th anni- versary of the Faculty of Management Science and Informatics. Are 25 years of existence of the faculty many or few? I‘ll try to express the ratio. Let me start by comparing the age of humanity to the age of our planet. If we compressed the age of the Earth, which is about 4.5 billion years, into one day, the first man on the Earth would appear one second before midnight. Similarly, if we compare the age of the faculty and the length of the existence of higher education on the Earth, the launch of which can be dated somewhere around the year 800, when Charlemagne established the requirement for clergy to be educated, to learn and to teach, and compressed this time to one day, the age of the faculty could be 30 minutes. When we realize what humans managed to accomplish in this 1 second of their existence, notional 30 minute existence of the faculty is the sufficient reason for a brief evaluation. In these imaginary 30 minutes the faculty has produced nearly 3,400 engineers and more than 150 PhD graduates. Of course, History of informatics and control at the University of Zilina is much older and dates back to 1972, when the Department of Technical Cybernetics was established. Information and communication technology in the field of science and research is booming, although it is still a young science. This edition of the journal brings the latest knowledge in the field of informatics, information and communication systems, management, optimization, simulation, etc. Informatics has been successful also because it helps to solve problems in other areas of research. Thanks to applied informatics, many difficult questions in economics, mechanical engineering, civil engineering, physics, etc. have been solved. Many questions are still open and waiting for our solutions mainly in an interdisciplinary approach and joint research projects. This edition is an example of the connection of informatics and mechanical engineering. In the journal you will find articles from the field of machines and equipment, material research, production technologies, etc. This edition of the journal will bring interesting information to all readers and will open new hori- zons in science and research. Emil Krsak COMMUNICATIONS 1A/2016 ● 3 Jakub Hrabovsky - Pavel Segec - Peter Paluch - Marek Moravcik - Jozef Papan * USABILITY OF THE SIP PROTOCOL WITHIN SMART HOME SOLUTIONS A smart home is being an important part of research due to its impact on the life of many people, who decide to try this partially known concept of building and controlling their houses. In this paper we present a little different approach to the implementation of a smart home structure and its methods in real environment. As a part of the work we specify main requirements on the architectural design, which should be considered in final solution. Our research is focused primarily on the use of open standards and tools. This approach became popular because it provides an alternative view in comparison to commercial ones, where mostly proprietary and publicly unknown protocols are used. According to this, three theoretical architectures are proposed and presented with their pros and cons. In the paper we concentrate mainly on the usage of SIP protocol and issues related to the communication between a remote user and a smart home. We are proposing two logical communication models. Each model describes the type of used SIP messages and their message flows. In addition, we consider financial aspects of simple and illustrative smart home solution, which as well pose issues to end users. Our solution offers implementation with minimal operational costs and high facility control of the smart home. The paper also includes a survey of potentially usable protocols for smart homes and the list of software (SW) and hardware (HW) components, which have been used to build a testing environment. Keywords: Home automation, smart home, SIP, session initiation protocol, central management. 1. Introduction In the heart of the system is the main controller, known as the central control unit. End users, using for example their The development of new technologies influences almost all mobile devices, are able to manage controller activities. Users fields of human life including home environment. By using new send commands to the controller and as an answer they receive inventions and communication standards, we are able to automate requested information about actual situation in their home. operation of whole buildings, control their parts and achieve With this approach they are able to remotely access their houses their optimal usage. The optimization causes a huge reduction of independent of their actual place and time of day. The controller operational costs and time needed for flawless run of automated is also responsible for the management and interaction of each buildings. subsystem inside the smart home. This central control unit An example of intelligent building is the smart home, provides unified control of all electronic devices, which are where all core functions are controlled by special entity that is members of the smart home. To ensure this, usually a special manageable by end users. Common functions are heating, lighting purpose software program is running inside the central control control, security and functions related to danger detection. The unit. It receives data from all connected devices, processes them term “smart home” comes from the idea of automating actions of and performs appropriate actions depending on actual situation. common house devices and interconnecting them to be capable There are other devices beside controller, which play a role of co-operation without user interaction. within an architecture. They build a group where they are all The smart home has to be seen as a functional cluster of interconnected via a special network. This way they are able to subsystems, which correspond with mentioned functions. Each exchange information about different parts of home environment subsystem is required to make its specified functionality and and so create its overall view available for end users. This service co-operate with other subsystems. They all together make one together with the remote access highly increases comfort of end complex system. users. * Jakub Hrabovsky, Pavel Segec, Peter Paluch, Marek Moravcik, Jozef Papan Faculty of Management Science and Informatics, University of Zilina, Slovakia E-mail: [email protected] 4 ● COMMUNICATIONS 1A/2016 In our proposal we are relying only on open communication protocols like SIP, some approaches are using SIP infrastructures standards, mainly the Session Initiation Protocol (SIP) [1]. and applications already in existence to implement a smart home This approach is different in comparison to methods used in model. Such approach is presented in [4], where existing IP commercial sphere,
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