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The Turbulent Telecommunications
Kuchar, Anton

Formato:	,
Enlaces:	The paper depicts the rapidly changing scene in the telecommunications arena. It provides an overview of recentkey developments in technologies that enable access to broadband Internet, describes the trends in provisioning services onthe IP platform and discusses policy, regulatory and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Location Based Services in GSM Networks and New Possibilities for their Application in Transport
Dubovan, Jozef - Dado, Milan

Formato:	,
Enlaces:	An enormous growth of mobile communication gives new challenges for new services creation. One of the possibilities is to focus attention on the localisation and localisation based services. It gives for mobile networks customers new information about position of another…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Measuring of Block Error Rates in High-Speed Digital Networks
Ivaniga, Petr - Mikus, Ludovit

Formato:	,
Enlaces:	Error characteristics is a decisive factor for the digital networks transmission quality definition. The ITU – TG.826 and G.828 recommendations identify error parameters for high – speed digital networks in relation to G.821 recommendation. The paper describes the relations between…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Wireless Local Networks to Record the Railway Traffic Control Equipment Data
Gorczyca, Przemyslaw - Mikulski, Jerzy - Bialon, Andrzej

Formato:	,
Enlaces:	Article presents a concept of a distributed diagnostic railway traffic control system using the short – range wireless networks as a main communication medium.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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IT Security Aspects of Industrial Control Systems
Holecko, Peter - Krbilova, Izabela

Formato:	,
Enlaces:	This paper discusses a set of general network system architectures for industrial process control systems as well as vulnerabilities related to these systems and the IT threats these systems are exposed to from the point of view of Common Criteria…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Modeling of Current Transformers Under Saturation Conditions
Prochazka, Martin; University of West Bohemia

Formato:	,
Enlaces:	During a short circuit the input signal of the relay can be distort by the magnetic core saturation of the current transformer. It is useful to verify the behavior of CT by a mathematical model. The paper describes one phase…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Programmable Logic Controllers for Systems of Automatic of the Level Crossing
Kornaszewski, Mieczyslaw

Formato:	,
Enlaces:	The railway crossings are vulnerable to incidence of high number of accidents often deadly. In order to face this problem, the modern systems of automatic of the level crossing have been introduced. These systems are based on Programmable Logic Controllers,…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Modelling of Signal - Level Crossing System
Novak, Daniel

Formato:	,
Enlaces:	The author presents an object-oriented model of a railway level-crossing system created for the purpose of functional requirements specification. Unified Modelling Language (UML), version 1.4, which enables specification, visualisation, construction and documentation of software system artefacts, was used. The main…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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Primary Factors Affecting Safety of Control System
Rastocny, Karol; University of Zilina - Foltan, Michal

Formato:	,
Enlaces:	Aim of the paper is to point out some of the factors that affect safety of control system. Already in initial stages of the control system life-cycle it is necessary to analyze the effect of each of these factors on…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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10.

Functional Safety Specification of Communication Profile PROFIsafe
Rofar, Jan - Franekova, Maria

Formato:	,
Enlaces:	Paper maps the trends in area of safety-related communication within PROFIBUS and PROFINET industry networks. There are analyses safety measures and Fail-safe parameters of PROFIsafe profile in version V2 and their localisation in Safety Communication Layer SCL, which guarantees Safety…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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11.

Increasing of RFID System Read Range
Vestenicky, Peter

Formato:	,
Enlaces:	This paper describes some computations needed to increase RFID system read range twice without any changes in RFID reader. The increasing of read range is done only by proper selection of RFID marker parameters – coil diameter and number of…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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12.

Development and Analysis of Train Brake Curve Calculation Methods with Complex Simulation
Vincze, Bela - Tarnai, Geza

Formato:	,
Enlaces:	This paper describes an efficient method using simulation for developing and analyzing train brake curve calculation methods for the on-board computer of the ETCS system. An application example with actual measurements is also presented.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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13.

Safety of Transport Process
Zahradnik, Jiri - Janota, Ales

Formato:	,
Enlaces:	The paper deals with formulation of general rules and principles needed for ensuring safety of the transport process.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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14.

Three Phase Soft Commutation Auxilary Resonant Pole Inverter
Sladecek, Vaclav

Formato:	,
Enlaces:	This paper covers the circuit modification of the power part of the inverter with auxiliary resonant poles utilising configuration of switches realised with routinely produced IGBT modules. Covered is also the control optimisation which goal is the minimisation of switching…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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15.

Parameters Evaluation of PLC Dependability and Safety
Zdansky, Juraj - Rastocny, Karol

Formato:	,
Enlaces:	This paper is focused on evaluation of dependability and safety parameters of PLC (Programmable Logic Controller). Achievement of requested level of these parameters is an application assumption for using PLC in control of safety critical processes. Evaluation of these parameters…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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16.

ZnO Nanostructures Prepared by RF Sputtering
Flickyngerova, Sona - Tvarozek, Vladimir - Novotny, Ivan - Satka, Alexander - Sutta, Pavol

Formato:	,
Enlaces:	ZnO is shortly reviewed as significant material for nanotechnology. Sputtered ZnO thin films showed colummarpolycrystalline structure with preffered orientation in <002> direction, resistivity ~ 1 Wcm and optical bandgap Eg = 3,33 eV. Nanoclusters of Au and ZnO were formed…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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17.

Calculation of S11 Parameter of Coplanar Strip and Influence of Technology Process
Heindl, Karel - Blecha, Tomas - Skocil, Vlastimil - Braun, Jaromir

Formato:	,
Enlaces:	The paper is focused on a calculation of the S11 parameter of the coplanar strips. The primary parameterscalculations of the coplanar strips are described in the first part. The scattering parameters are defined. The calculation of the S11 parameter and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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18.

Electric Power Systems - EMC
Kovacova, Irena - Kovac, Dobroslav

Formato:	,
Enlaces:	The paper is dealing with some electromagnetic compatibility (EMC) problems of converters and inverters, which are utilized for feeding of electric machines.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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19.

Operation Analysis of the Series-Parallel Resonant Converter Working above Resonance Frequency
Dzurko, Peter - Dudrik, Jaroslav

Formato:	,
Enlaces:	The present article deals with theoretical analysis of operation of a series-parallel converter working above resonance frequency. Derived are principal equations for individual operation intervals. Based on these made out are waveforms of individual quantities during both the inverter operation…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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20.

On the Stability of Average Effective Wage Rate in Enterprise
Balciar, Andrej

Formato:	,
Enlaces:	In the article a model of the investment activity of an enterprise including financing of investment from new loans, from net profit and with the help of depreciation is designed. Equilibrium of average effective wage rate is defined and its…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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21.

Construction of Lukasiewicz Filters
Kalina, Martin - Havranova, Zuzana

Formato:	,
Enlaces:	The paper deals with Łukasiewicz filters, based on aggregating of weights. Some Łukasiewicz filters are constructed and conditions to be put on the values of the weights are given.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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22.

T-Norm-Based Orderings on Y[0,1]n
Kyselova, Darina

Formato:	,
Enlaces:	In this paper we recall orderings based on t-norms, which could help to select the best suited decision procedure in many practical situations. We discuss several refinements of t-norm based orderings which break some of possible ties.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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23.

Hamilton´s Principle and Electric Circuits Tudory
Mayer, Daniel

Formato:	,
Enlaces:	In the theory of electrical or electromechanical circuits different methods are known for construction of mathematical model. In this paper another, alternative method is introduced that is based on Hamilton variational principle that is generally valid in physics.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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24.

Energy Balance and Operating Features of the Heat Accumulator
Fiala, Pavel; Brno University of Technology - Behunek, Ivo - Kadlecova, Eva

Formato:	,
Enlaces:	There are described design and realization of a heat accumulator in the article which joins advantages and eliminates disadvantages of water and gravel accumulators. Inside the accumulator there are suppressed heat convection and conduction between layers of storage matter, so…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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25.

Numerical Solution of the Heat Accumulator Layer by Means of FEM
Fiala, Pavel; Brno University of Technology - Behunek, Ivo - Kadlecova, Eva

Formato:	,
Enlaces:	The article deals with one layer of a heat accumulator which is suitable for solar systems. There is a description of the air turbulence, heat transfer, conduction and also phase change of CaCl2.6H2O which is used to increase the density…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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26.

Investigation of Magnetic Field in the Subway Station
Henzl, Ctibor - Kacor, Petr - Palecek, Josef

Formato:	,
Enlaces:	Paper deals with computing of magnetic field in the rails surroundings of subway (underground). The calculation of field is made by using of an analytical method in Excel VBA. There is also used commercial FEM software ANSYS and finite element…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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27.

Levitation of Superconductive Cable in Earth Magnetic Field
Karban, Pavel - Dolezel, Ivo - Ulrych, Bohus

Formato:	,
Enlaces:	The paper represents an introductory study about a superconductive cable levitating in Earth’s magnetic field. Built are two mathematical models of the problem providing both the shape of the arc of the cable and forces acting along it. The theoretical…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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28.

Simulation of Heat Transfer and Electromagnetic Fields of Protected Microcomputers
Lakatos, Josef - Cuntala, Josef - Kondelova, Anna

Formato:	,
Enlaces:	The paper presents results of collaboration between Department of mechatronics and electronics at University of Žilina and VÚVT Engineering a.s. Žilina in area of heat transfer simulations and disturbing electromagnetic radiation simulations in computer construction. The simulations results were used…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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29.

General Approach to Computation of Self- and Mutual Inductances of Iron-free Coils
Mayer, Daniel - Jedlicka, Martin

Formato:	,
Enlaces:	The paper discusses various ways of computation of self- and mutual inductance of massive iron-free coils. These inductances are expressed by a multiple definite integral whose calculation is realized by the Monte Carlo (MC) method. The theoretical analysis is illustrated…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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30.

Analysis of an Electromagnetic Actuator with Permanent Magnet
Mayer, Daniel - Ulrych, Bohus

Formato:	,
Enlaces:	The paper deals with an electromagnetic actuator with permanent magnet. Starting from solution of its mathematical model we determined its basic operation parameters and characteristics. The theoretical analysis is illustrated on two typical examples whose results are discussed.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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31.

Visualisation of Magnetic Fields Generated by Helmholtz Coils
Suriansky, Jozef - Frank, Tibor

Formato:	,
Enlaces:	This article deals with a method of a homogenous magnetic field generation using Helmholtz coils. There is also an experiment of a magnetic field visualisation with a digital image processing performed with a magneto-resistive sensor described. At the end of…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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32.

Implementation of Information Systems in Manufacturing Area
Peniak, Peter

Formato:	,
Enlaces:	Paper deals with new trends regarding implementation of Information systems as one of the most important parts of manufacturing infrastructure. The main attention is paid to Manufacturing Execution Systems and Shop Floor integration regarded from the viewpoint of their implementation,…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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33.

System Failure Rate Calculation
Hanusova, Nadenda - Zahradnik, Jiri

Formato:	,
Enlaces:	The article deals with methodology of a system failure rate calculation that is based on the adoption of the condition l.t<<1. Assuming that the condition is satisfied, the serial-parallel system failure rate calculation is easier and the results are either…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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34.

Identification and Modelling of Linear Dynamic Systems
Kocur, Stanislav

Formato:	,
Enlaces:	System identification and modelling are very important parts of system control theory. System control is only as good as good is created model of system. So this article deals with identification and modelling problems. There are simple classification and evolution…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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35.

Formal Specification in “Z” Language by Software Z/EVES
Svec, Josef - Zahradnik, Jiri

Formato:	,
Enlaces:	The paper shows a short overview of representation formalisms, which can be used for specification of technical system functional requirements. Some basic model schemas of function called User Identification of ITS are presented by formal specification “Z” language and software…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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36.

Quantitative Hazard and Risk Analysis
Tarnai, Geza - Saghi, Balazs - Krbilova, Izabela

Formato:	,
Enlaces:	In this paper a quantitative method for hazard and risk analysis is discussed. The method was developed and introduced for the allocation of safety requirements to the functions of a railway signaling remote control system.
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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37.

New method of LCD display viewing angle designation
Hargas, Libor - Cuntala, Jozef

Formato:	,
Enlaces:	Most people think that LCD monitors are low or zero in radiation. That is not true. The backlighting uses thousand volts for fluorescence and carries an electromagnetic field. Zero radiation LCD monitors use e.g. clear metallic grating in front of…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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38.

CATV Network Evolution
Hlubik, Jan - Schwartz, Ladislav - Hottmar, Vladimir

Formato:	,
Enlaces:	Cable television (CATV) distributions are transmissions systems assigned for received and distribution televisions(TV) and radios (R) signals. This paragraph is about individual stages of evolution of this distribution. It begins by classic CATVnetwork by using coaxial cable then it continues…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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39.

Implementation of Hybrid DCT/DPCM Video-Encoder in the DM642 EVM for Educational Purposes
Huska, Jozef - Kulla, Peter

Formato:	,
Enlaces:	There is presented implementation of hybrid DCT/DPCM video-encoder in the power ful TI’s media processor TMS320DM642 embed in evaluation module DM642 EVM. Code Composer Studio 3 is used as working space. Videoencoder is implemented with use of C code so…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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40.

Unequal Input Voltages Distribution Between the Serial Connected Halfbridges
Ovcarcik, Radovan - Spanik, Pavol - Sul, Robert - Chimento, Filippo

Formato:	,
Enlaces:	This paper describes a topology of DC-DC converter consisting in two serial connected half-bridges. Secondary circuit is realized like a conventional full-wave rectifier. The main advantage of this topology is the possibility of dividing the input voltage between the half-bridges.…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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41.

Negative Influence of Frequency Converters on Power Distribution Network
Drabek, Pavel; University of West Bohemia - Fort, Jiri; University of West Bohemia - Pittermann, Martin; University of West Bohemia

Formato:	,
Enlaces:	This paper deals with low-frequency analysis of the phase current taken by frequency converters from a power distribution network. Problems concerning with characteristic harmonic currents are relatively well-known. Therefore the main emphasis of this work is focused on the investigation…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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42.

Comparison between FOC and DTC Strategies for Permanent Magnet Synchronous Motors
Garcia, Xavier del Toro - Zigmund, Branislav - Terlizzi, Angela A. - Pavlanin, Rastislav - Salvatore, Ligui

Formato:	,
Enlaces:	This paper presents a comparison between two control strategies for Permanent Magnet Synchronous Motors (PMSM): Field Oriented Control (FOC) and Direct Torque Control (DTC). These two strategies can be considered among the family of Vector Control (VC) methods and provide…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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43.

Neural Network Based Recognition of Signal Patterns in Application to Automatic Testing of Rails
Ciszewski, Tomasz - Lukasik, Zbigniew

Formato:	,
Enlaces:	The paper describes the application of neural network for recognition of signal patterns in measuring data gathered by the railroad ultrasound testing car. Digital conversion of the measuring signal allows to store and process large quantities of data. The elaboration…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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44.

Application of FPGA's in Flexible Analogue Electronic Image Generator Design
Kulla, Peter - Slavik, Stefan - Huska, Josef

Formato:	,
Enlaces:	This paper focuses on usage of the FPGAs (Field Programmable Gate Arrays) Xilinx as a part of our more complex workdedicated to design of flexible analogue electronic images generator for application in TV measurement technique or/and TV servicetechnique or/and education…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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45.

Different View on PQ Theory Used in the Control Algorithm of Active Power Filters
Pavlanin, Rastislav - Marinelli, Maria - Zigmund, Brano

Formato:	,
Enlaces:	The improvement of power quality is a frequently discussed issue, which still requires a considerable research effort to be devoted to the study of the problem. The aim of this paper is to describe some problems related to the control…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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46.

Determination of Test Sequence for Intrusive Measurement of VTQoS in Environment Offixed Telecommunication Network
Pocta, Peter - Vaculik, Martin

Formato:	,
Enlaces:	This paper describes simulations of test sequences transmission for intrusive measurement of VTQoS inenvironment of fixed telecommunication network. The aim of simulations was a detection on the influence of this environment on the quality of transmission sequences. Evaluation the generated…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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47.

Aplication of New Method of Multi-Criteria Analysis
Jurica, Leos; VSB - Technical University of Ostrava - Hradilek, Zdenek; VSB - Technical University of Ostrava - Dvorsky, Jiri; VSB - Technical University of Ostrava - Krejci, Petr; VSB - Technical University of Ostrava

Formato:	,
Enlaces:	The increase of reliability of electrical networks can be achieved for example by use of new components. That modernisation is considerably expensive. Therefore close attention is paid to selection of new components and place of their position. The use of…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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48.

Single Phase Current-Source Active Rectifier for Traction: Control System Design and Practical Problems
Michalik, Jan; University of West Bohemia - Molnar, Jan; University of West Bohemia - Peroutka, Zdenek; University of West Bohemia

Formato:	,
Enlaces:	This research has been motivated by industrial demand for single phase current-source active rectifier dedicated for reconstruction of older types of dc machine locomotives. This paper presents converters control structure design and simulations. The proposed converter control is based on…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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49.

Algorithms of Space Vector PWM in Overmodulation Area
Peroutka, Zdenek; University of West Bohemia - Glasberger, Tomas; University of West Bohemia

Formato:	,
Enlaces:	The aim of this paper is the comparison and evaluation of different space vector PWM (SVPWM) strategies enabling the continuous transition from the linear modulation to the six-step mode. One of the important factors to be explored is the frequency…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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50.

Bio-Signals Application in Solution of Human- Machine Interface
Muzikarova, Ludmila - Mrazova, Jana

Formato:	,
Enlaces:	The article deals with the field called Human Machine Interface. It is targeted on the characteristics of the bio signals and their evaluation. Based on the results of cerebral and cephalic bio signals analysis, it is possible to evaluate the…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering