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Aproximadamente 21588 registro(s) hasta el momento: (journal)

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Recurso libre

Istanbul University Econometrics and Statistics e-Journal

Formato:	journal
Enlaces:	Descripción completa.
Fecha:	2011-07-21
Recurso:	Directory of Open Access Journals - DOAJ

Recurso libre

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

Recurso libre

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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10.

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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11.

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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12.

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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13.

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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14.

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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15.

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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16.

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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17.

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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18.

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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19.

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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20.

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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21.

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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22.

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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23.

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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24.

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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25.

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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26.

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

Recurso libre

27.

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

Recurso libre

28.

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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29.

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

Recurso libre

30.

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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31.

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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32.

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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33.

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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34.

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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35.

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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36.

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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37.

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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38.

Imagination, Geometry, and Substance Dualism in Descartes’s Rules
Norton, Michael Barnes; Villanova University

Formato:	Peer-reviewed Article
Enlaces:	In his Rules for the Direction of the Mind, Descartes elevates arithmetic and geometry to the status of paradigms for all the sciences, because of the potential for certainty in their results. This emphasis on certainty is present throughout the Cartesian…
Fecha:	2011-06-22
Recurso:	Gnosis: journal of Philosphy

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39.

Kant’s Critique of Judgment and Its Political Potential
Mills-Knutsen, Joshua; University of Kentucky

Formato:	Peer-reviewed Article
Enlaces:	Rousseau’s influence on Kant in the realm of ethical theory is well established. Just as Kant credits Hume with inspiring his critique of metaphysics, Kant admits a debt to Rousseau as an inspiration for his egalitarian approach to ethics. There…
Fecha:	2011-06-22
Recurso:	Gnosis: journal of Philosphy

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40.

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

Recurso libre

41.

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

Recurso libre

42.

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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43.

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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44.

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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45.

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

Recurso libre

46.

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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47.

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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48.

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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49.

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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50.

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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51.

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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52.

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

Recurso libre

53.

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

Recurso libre

54.

Protected Microcomputers from VUVT-Engineering
Sec, Martin - Misuth, Jan - Cuntala, Josef - Hargas, Libor - Kondelova, Anna

Formato:	,
Enlaces:	The paper presents properties of new protected microcomputer prototypes that recently developed VÚVTEngineering a.s. Žilina. The five new prototypes of protected microcomputers and displays provide users with important protection against radiated information leaking from a computer and suppress unfavorable effects…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

55.

New Possibilities of Power Electronic Structures Using SiC Technology
Sul, Robert - Dobrucky, Brano; University of Zilina, Faculty of Electrical Engineering, Dpt. of Mechatronics and Electronics - Ovcarcik, Radovan

Formato:	,
Enlaces:	This paper is dedicated to the recent unprecedented boom of SiC electronic technology. The contribution deals with brief survey of those properties. In particular, the differences (both good and bad) between SiC electronics technology and well-known silicon VLSI technology are…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

56.

Properties of the Si-SiO2 Interfaces in MOS Structures with Nitrogen Doped Silicon
Harmatha, Ladislav - Ballo, Peter - Breza, Juraj - Pisecny, Pavol - Tapajna, Milan

Formato:	,
Enlaces:	The article presents the results of capacitance measurements on MOS structures with a silicon substrate that wasdoped by nitrogen during the growth of the single crystal by Czochralski’s method. Attention is paid to the energydistribution of the trap density at…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

57.

Dielectric Spectroscopy of Ionic Glasses of the System CuI-CuBr-Cu2O-P2O5
Hockicko, Peter - Bury, Peter - Jamnicky, Miroslav - Jamnicky, Igor

Formato:	,
Enlaces:	We have used dielectric relaxation spectroscopy to measure frequency and temperature dependence of complexdielectric functions ε(ω), ε(T) of ion conductive glasses of the system CuI-CuBr-Cu2O-P2O5. The observation, analysis andinterpretation of the temperature and frequency dependences of real and imaginary part…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

58.

Thin Film Solar Cells and their Optical Properties
Jurecka, Stanislav - Pincik, Emil - Brunner, Robert

Formato:	,
Enlaces:	In this work we report on the optical parameters of the semiconductor thin film for solar cell applications determination. The method is based on the dynamical modeling of the spectral reflectance function combined with the stochastic optimization of the initial…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

59.

Solution Concept of Modular Single Phase Active Power Filters
Roch, Marek; University of Zilina - Bracinik, Peter; University of Zilina - Hrebenak, Anton

Formato:	,
Enlaces:	This paper investigates a modular or a decentralised single-phase active power filter control strategy. It is based on the evaluation of the harmonic reference load currents for the active power filter blocks operating under specific harmonic frequencies. The underlying principle…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

60.

Numerical Modelling of Electric Conductance of a thin Sheet
Kollar, Mojmir - Franek, Jaroslav

Formato:	,
Enlaces:	In this paper the numeric modelling of total resistance of a thin sheet, with local conductivity in randomlydistributed grains higher then is that of the basic matrix, is presented. The 2D model is formed by a structure of longitudinaland transversal…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

61.

Power Control Delay in WCDMA Mobile Radio Networks
Wieser, Vladimir - Psenak, Vladimir

Formato:	,
Enlaces:	This article presents the basic theory of power control and deals with the mutual interference among mobile subscribers (basic stations) in uplink (downlink). Considering the SIR requirements, each transmitter in the WCDMA network have to use minimum output power, which…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

62.

Special Asynchronous Dynamometer Designed for Fast Transient Phenomena
Skala, Bohumil; University of West Bohemia in Plzen - Fort, Jiri; University of West Bohemia in Plzen - Sykorova, Lucie; University of West Bohemia in Plzen

Formato:	,
Enlaces:	This paper is focused on measurement of output of the rotary electromechanic machines, i.e. torque and speed. Special attention is paid to the torque measurement under transient phenomena. The paper is also concentrated on the optimization and interference of the…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

63.

Infrared Insight into the Network of Hydrogenated Amorphous and Polycrystalline Silicon thin Films
Mullerova, Jarmila

Formato:	,
Enlaces:	IR measurements were carried out on both amorphous and polycrystalline silicon samples deposited by PECVDon glass substrate. The transition from amorphous to polycrystalline phase was achieved by increasing dilution of silaneplasma at the deposition process. The samples were found to…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

64.

Ordered thin Films of Magnetic Nanoparticles
Roschlova, Jana - Weis, Martin - Satka, Alexander - Plecenik, Tomas - Pistora, Jaromir - Petridis, Dimitris - Barancok, Drahoslav - Cirak, Julius

Formato:	,
Enlaces:	The investigation of physical properties of bulk materials is a traditional approach in materials science. Duringlast decades the interest has been focused on two-dimensional ordered systems of nanometer-size particles with unusualmechanical, electrical, magnetic, optical, chemical properties, which are perspective for…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

65.

On the Segmented Rotor Reluctance Synchronous Motor Saliency Ratio Calculation
Viorel, Ioan Adrian; Technical University of Cluj-Napoca - Banyai, Attila; Technical University of Cluj-Napoca - Martis, Claudia Steluta; Technical University of Cluj-Napoca - Tataranu, Bogdan; Technical University of Cluj-Napoca - Vintiloiu, Ioana; Technical University of Cluj-Napoca

Formato:	,
Enlaces:	The reluctance synchronous motor performance highly depends on its saliency ratio. Therefore an accurate analytical calculation of the motor’s saliency is quite a necessity within the designing procedure. In this paper an analytical method to calculate the main motor inductances…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

66.

Modelling of a Serial Wound DC Motor Supplied by a Semi-Controlled Rectifier
Zaskalicky, Pavel; Technical university of Kosice

Formato:	,
Enlaces:	A serial wound DC motor is one of most used electrical machines in a small electrical instruments and home equipments by reason, that its speed is easily controlled by a supply voltage. Suppose that the motor is supplied by a…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

67.

The Influence of Particle Size and Substituent Contents on the Magnetic Properties of Be or Cu Substituted NiZn Ferrites
Slama, Jozef - Usak, Elemir - Dosoudil, Rastislav - Gruskova, Anna - Usakova, Marianna - Jancarik, Vladimir

Formato:	,
Enlaces:	Polycrystalline NiZn ferrites with the chemical formula (Ni0.3Zn0.7)1−xMexFe2O4 where Me being Be or Cu andx=0.05, 0.1 and 0.25 have been prepared by a ceramic method. Certain magnetic properties such as the coercivity Hc, initialpermeability mi, real part of the complex…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

68.

The Symmetry of Optical Field in Photonic Crystal Fibre with Trigonal Symmetry
Turek, Ivan - Kacik, Daniel - Martincek, Ivan

Formato:	,
Enlaces:	Some photographs of intensity of optical field of a photonic crystal fibre are presented in the contribution. Presented photographs document that the symmetry of photonic crystal creating the cladding of fibre is manifested in the symmetry of distribution of the…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

69.

Novel Materials for Molecular Electronics and their Characterization
Weis, Martin - Barancok, Drahomir - Cirak, Julius - Tomcik, Peter - Vajda, Jan

Formato:	,
Enlaces:	Defect-free diacetylene (DA) Langmuir-Blodgett films polymerized on a air/water interface have various¨applications in biosensors, membrane physics or low-dimensional physics. Polymerization of DA monolayers is in general way characterized by optical spectroscopy. In this study for evaluation of photopolymerization process for…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

70.

Optimization of Torque Sensor Input Parameters and Determination of Sensor Errors and Uncertainties
Vojtko, Jozef

Formato:	,
Enlaces:	This paper introduces the basic knowledge about magnetoelastic torque sensor designed for non-contact measurements. The paper brings results of Institutional project “The development and realization of torque sensor with appropriate equipment.” The optimization of torque sensor working conditions and sensor…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

71.

Non Destructive Testing - Identification of Defects in Materials
Bachorec, Tibor - Dedkova, Jarmila

Formato:	,
Enlaces:	In electrical impedance tomography (EIT) currents are applied through the electrodes attached on the surface of the object, and the resulting voltages are measured using the same or additional electrodes. Internal conductivity distribution is recalculated from the measured voltages and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

72.

Simulation of Material Influences in MR Tomography
Bartusek, Karel - Kadlecova, Eva - Steinbauer, Miloslav

Formato:	,
Enlaces:	Materials with different magnetic susceptibility can cause deformation of magnetic field in MR tomograph, resulting in errors in obtained image. Using simulation and experimental verification we can solve the effect of changes in homogeneity of static magnetic fields caused by…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

73.

Propagation of Surge Waves on Non-Homogeneous Transmission Lines Induced by Lightning Stroke
Benesova, Zdenka - Kotlan, Vasek

Formato:	,
Enlaces:	The paper deals with surge phenomena on non-homogeneous transmission lines. The case of surge phenomena caused by the lightning stroke is considered. The lightning is modeled as the current wave injected by the source placed at any internal point of…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

74.

An Optimization of Experimental Data Processing for the MAT Method Application
Bydzovsky, Jan - Visnovec, Tomas - Usak, Elemir

Formato:	,
Enlaces:	Magnetic adaptive testing (MAT) is a new method of magnetic non-destructive inspection of structural mechanical properties of magnetic construction materials. Principle of MAT consists in analysis of several magnetic properties I a wide range of input variables and to find…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

75.

Investigation of Brain Arterial Circle Malformations Using Electrical Modelling and Simulation
Capova, Klara; University of Zilina - Blazek, Vladimir - Cap, Ivo

Formato:	,
Enlaces:	The paper deals with the cerebral arterial system investigation by means of electrical modelling and simulations. The main attention is paid to the brain arterial circle malformations (stenoses and aneurysms) and their determination and evaluation by computer-aided methods as tools…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

76.

Preliminary Results for a Monocular Marker-Free Gait Measurement System
Courtney, Jane - de Paor, Annraoi

Formato:	,
Enlaces:	This paper presents results from a novel monocular marker-free gait measurement system. The system was designed for physical and occupational therapists to monitor the progress of patients through therapy. It is based on a novel human motion capturemethod derived from…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

77.

Methods for Free-Space Ultra-Short Solitary EMP Measurement
Drexler, Petr; Brno University of Technology - Fiala, Pavel - Kadlecova, Eva

Formato:	,
Enlaces:	There are some suitable methods for ultra-short solitary electromagnetic pulses (EMP) measurement. The EMPs are generated by high power microwave generators. The characteristic of EMPs is high power level (Pmax = 250 MW) and very short time duration (tp Î…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

78.

Basic Circuit for Silicon Cochlea
Durackova, Daniela - Kruzlic, Peter

Formato:	,
Enlaces:	Cochlear implants restore partial hearing to people with severe to profound sensorineural deafness. Low-power wide-dynamic-range systems are hard to build. The biological cochlea is one of the most awesome examples of such system. It can sense sounds over 12 orders…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

79.

Microwave Nondestructive Testing of Dielectric Materials
Faktorova, Dagmar

Formato:	,
Enlaces:	The article focuses on measurements on pertinax and polyethylene samples to obtain their material characteristics by means of microwave investigation. Evaluation of the results is performed and accuracy possibilities are discussed. The influence of free holes and longitudinal cracks in…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

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80.

Minigenerator - Analysis, Design and Tests
Fiala, Pavel; Brno University of Technology - Vojtek, Tomas - Behunek, Ivo

Formato:	,
Enlaces:	The paper presents results of the analysis of the vibrational generator. The paper deals with the design of a vibrational generator that is used as a power supply for independent electric circuits. The vibrational generator can be used in the…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

81.

Inverse Problems of Eddy Current Testing and Uncertainties Evaluation
Grondzak, Karol

Formato:	,
Enlaces:	This paper deals with the problem of uncertainties evaluation when the procedure of inverse problems is used for processing the eddy current testing data. First the general inverse problem algorithm is described. Next the influence of different types of errors…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

82.

A Simple Method of Goal-Directed Lossy Synthesis and Network Optimization
Hajek, Karel - Michal, Vratislav - Sedlacek, Jiri - Steinbauer, Miloslav

Formato:	,
Enlaces:	A simple method for synthesis of goal – directed lossy filters is described in the present paper. This method of synthesis is based on the application of optimization procedures used in usually accessible professional software for network analysis. The presented…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

83.

Influence of Electric Discharges on Bearings of Electric Machines
Chmelik, Karel - Cech, Vaclav - Foldyna, Jiri

Formato:	,
Enlaces:	I the last time many articles were found out discussed about shaft voltage, bearing currents and their influence on lifetime and reliability of electric machines bearings. This is associated with extension of use of static converters for control drives for…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

84.

Variation of Eddy Current Density Distribution and its Effect on Crack Signal in Eddy Current Non-Destructive of Testing
Janousek, Ladislav

Formato:	,
Enlaces:	The paper deals with variation of eddy current density distribution along material depth and investigates an effect of the variation on a crack signal in eddy current non-destructive testing. Four coaxial rectangular tangential coils are used to induce eddy currents…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

85.

Linear Motor for Drive of Belt Conveyor
Krasl, Milan - Ulrych, Bohus

Formato:	,
Enlaces:	This paper introduces a novel approach on the design of a linear motor for drive of belt conveyor (LMBC). The motor is a simple combination of asynchronous motor in plane. The electromagnetic forces is one of the most important parameters…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

86.

Enhancement of the Remote Field Eddy Current Testing Performed from Outside of a Magnetic Tube
Marek, Tomas - Gombarska, Daniela

Formato:	,
Enlaces:	The paper deals with design of remote field eddy current probe for non-destructive testing dedicated for inspection of ferromagnetic tubular material from outside. The remote field effect inside the tube wall is achieved by the medium of a magnetic shield…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

87.

Desigin of Synthetic Elements with Transimpedance Operational Amplifiers
Murina, Milan - Steinbauer, Miloslav

Formato:	,
Enlaces:	One way how to design active filters for wider frequency band is application of transimpedance operational amplifiers (TOAs) based on current mode. For this aim the TOAs exhibit the most suitable properties: large bandwidth, highslew rate, good linearity, high gain,…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

88.

The Potency of Optical and Augmented Reality Mirror Boxes in Amputees and People with Intact Limbs
O'Neill, Kieran - de Paor, Annraoi

Formato:	,
Enlaces:	Phantom limb pain is the distressing problem experienced by many amputees, defined as a painful sensation perceived in the area of the missing body part. Phantom limb pain can be very severe and disabling. It continues to be experienced by…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

89.

A New Eccentric Geomagnetic Dipole to Give the Correct Dip Pole Locations
de Paor, Annraoi M; NUI Dublin - Burke, Edward

Formato:	,
Enlaces:	In this paper, we describe a new eccentric dipole model of the Earth’s magnetic field. The constraints under which the conventional eccentric dipole model is defined result in predicted dip pole locations that differ significantly from the measured locations. Here,…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

90.

Numerical Modeling of Electromagnetic Field Effects on the Human Body
Psenakova, Zuzana

Formato:	,
Enlaces:	Interactions of electromagnetic field (EMF) with environment and with tissue of human beings are still under discussion and many research teams are investigating it. The human simulation models are used for biomedical research in a lot of areas, where it…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

91.

Design of Special Light Source for Biological Application
Steinbauer, Miroslav - Kadlecova, Eva

Formato:	,
Enlaces:	This paper presents information about design of special light sources, which is intended for photosynthesis process research, especially for photoinhibition effect. Required properties were continuous spectral characteristic with respect to photosynthetically active wavelength area, possibility of luminous flux regulation and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

92.

Sympathie restreinte et sympathie étendue dans le Traité de la Nature Humaine de David Hume
Blouin, Philippe; Université de Montréal

Formato:	Peer-reviewed Article
Enlaces:	Cet article consiste en une analyse critique de la notion de sympathie dansles deuxièmes et troisièmes tomes du Traité de la Nature Humaine de DavidHume. Il s’agit plus particulièrement de l’étude du passage de la sympathierestreinte à la sympathie étendue…
Fecha:	2011-06-22
Recurso:	Gnosis: journal of Philosphy

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93.

Address Translation Problems in IMS Based Next Generation Networks
Godor, Balazs

Formato:	,
Enlaces:	The development of packed based multimedia networks reached a turning point when the ITU-T and the ETSIhave incorporated the IMS to the NGN. With the fast development of mobile communication more and more services andcontent are available. In contrast with…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

94.

Market of Electronic Services in Poland as a Basis to Develop Economy Based on Knowledge - Diagnosis and Perspective of Developed
Maziarz, Wieslaw

Formato:	,
Enlaces:	Development of economy based on knowledge in Poland is determined by the market of electronic communication services that is hardly competitive and at the same time in efficient, what is expressed in a low access level tothe broad-band services and…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

95.

Application of Fuzzy Logic in Control of Switched Reluctance Motor
Brandstetter, Pavel; VSB - Technical University of Ostrava - Hrbac, Roman; VSB - Technical University of Ostrava - Polak, Martin; VSB - Technical University of Ostrava - Stepanec, Libor; Unicontrols a.s.

Formato:	,
Enlaces:	The flux linkage of switched reluctance motor (SRM) depends on the stator current and position between the rotor and stator poles. The fact determines that during control of SRM current with the help of classical PI controllers in a wide…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

96.

Characteristics of Magnetic Properties of Substituted Hexagonal Ferrites
Jancarik, Vladimir - Gruskova, Anna - Slama, Jozef - Dosoudil, Rastislav - Gonzalez, Alvaro - Mendoza, Guillermo

Formato:	,
Enlaces:	The samples of barium hexaferrite BaFe12-2x(Me1Me2)xO19 with x from 0.0 to 0.6 were prepared by variousmethods. The cationic preference of mainly divalent Me1 = Zn, Co, Ni, Sn ions and tetravalent Me2 = Ti, Zr, Ir, Sn, Ru ionsand their…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

97.

Researching of Coders Influence on Basic Measurement Signals Used in Optimal Test Sequence, Researching of Coders Influence on Basic Measurement Signals Used in Optimal Test Sequence
Pocta, Peter - Vaculik, Martin

Formato:	,
Enlaces:	This document describes processing basic measurement signals, which were used in test sequence with different coders. The determination of degradation degree of these signals and the elimination of these coders influences on these signals was the aim of this paper.…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

98.

Next Generation Networks, Next Generation Networks
Schwartz, Ladislav - Trstensky, Dusan - Cepciansky, Gustav

Formato:	,
Enlaces:	Two network types had been existing in Slovakia by the end of the year 2004 – public switched telephone network – PSTN and packet switched data network – DCN. The other network, known as the next generation network – NGN,…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

99.

Experimental Evaluation of PI Tuning Techniques for Field Oriented Control of Permanent Magnet Synchronous Motors
Zigmund, Branislav - Terlizzi, Angela A. - Garcia, Xavier del Toro - Pavlanin, Rastislav - Salvatore, Ligui

Formato:	,
Enlaces:	This paper presents the experimental evaluation of a commonly used methodology to tune the PI regulators of the Field Oriented Control (FOC) strategy for Permanent Magnet Synchronous Motors (PMSMs). The methodology used is based on the Absolute Value Optimum (AVO)…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering

Recurso libre

100.

Synchronous and Asynchronous ATM Multiplexor Properties Comparsion, Synchronous and Asynchronous ATM Multiplexor Properties Comparsion
Zabka, Jan

Formato:	,
Enlaces:	The article is aimed to ATM multiplexor computer model utilisation. Based on simulation runs we try to review aspects of use a synchronous and asynchronous ATM multiplexors. ATM multiplexor is the input queuing model with three inputs. Synchronous multiplexor works…
Fecha:	2011-06-22
Recurso:	Advances in Electrical and Electronic Engineering