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Aproximadamente 601 registro(s) hasta el momento: (journal)

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Recurso libre

A Combined TOPSIS and FA Based Strategic Analysis of Technical Condition of High Power Transformers
Bartlomeijczyk, Mikolaj - Gutten, Miroslav - Hamacek, Stefan

Formato:	,
Enlaces:	The paper presents mathematical model - TOPSIS method, which was utilized on insulating state of distribution transformer to analyze and sensibility of individual measurements methods mutual comparison. We can uniquely determine the importance of these measurements methods with this mathematical…
Fecha:	2013-09-24
Recurso:	Advances in Electrical and Electronic Engineering

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Surface Effect on Three Phase Lines of Low-Ohmic Furnaces
Novak, Pavel

Formato:	,
Enlaces:	The article another option of using numerical method of elementary conductors in surface effect three-phase supply linesfor low-ohmic furnaces. Impedance asymmetry of three-phase supply lines of different conductor profiles and various spaceconfigurations is analysed following to the author`s article published…
Fecha:	2011-06-29
Recurso:	Advances in Electrical and Electronic Engineering

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Design of Fuzzy Based Virtual Actuator for a Class of Nonlinear Systems
Filasova, Anna; Technical University of Kosice - Serbak, Vladimir; Technical University of Kosice

Formato:	,
Enlaces:	The paper presents new conditions suitable in design of a virtual actuator for a class of continuous-time nonlinear systems represented by Takagi-Sugeno models, and measurable premise variables. Simulation results illustrate the design procedure and demonstrate the basic performances of the…
Fecha:	2012-06-30
Recurso:	Advances in Electrical and Electronic Engineering

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A Single MO-CFTA Based Electronically/Temperature Insensitive Current-mode Half-wave and Full-wave Rectifiers
Kongnun, Weerapon - Silapan, Phamorn

Formato:	,
Enlaces:	The article presents a current-mode full-wave rectifier employing multiple output current follower transconductance amplifier (MO-CFTA). The both circuits description is very simple, it merely comprises only single MO-CFTA, without external passive element. In addition, the magnitude and direction of output…
Fecha:	2013-09-24
Recurso:	Advances in Electrical and Electronic Engineering

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Fabrication and Properties of Er-Doped Nanocrystalline Phase-Seperated Optical Fibers
Dhar, Anirban; Institute of Photonics & Electronics, ASCR v.v.i, - Kasik, Ivan; Institute of Photonics & Electronics, ASCR v.v.i, - Podrazky, Ondrej; Institute of Photonics & Electronics, ASCR v.v.i, - Matejec, Vlastimil; Institute of Photonics & Electronics, ASCR v.v.i,

Formato:	,
Enlaces:	The fabrication of Er-doped ZrO2-based nanocrystalline phase-separated optical fiber preforms using the MCVD and solution doping techniques is presented and discussed in details in the paper. Preforms with nearly transparent cores containing Er-doped nanocrystals with dimensions mainly within 20-80 nm…
Fecha:	2013-03-30
Recurso:	Advances in Electrical and Electronic Engineering

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Optical Properties of Microstructured Fibre Tuned by Filling with Magnetic Liquids
Vanda, Jan; HiLASE project, Institute of Physics, Acadamy of Sciences of the Czech Republic - Candiani, Alessandro; Information Engineering Department, University of Parma, Area Parco delle Scienze 181/A 43124, Parma, Italy

Formato:	,
Enlaces:	Alternative for adjust optical fiber light-guiding properties by bulk glass doping is provided by microstructured optical fibers, which allows access directly to the light guiding core via their microstructure. Following paper will report utilizing of suspended-core, so-called high-delta, microstructured optical…
Fecha:	2013-09-24
Recurso:	Advances in Electrical and Electronic Engineering

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Permanent Magnet Flux-Switching Machine, Optimal Design and Performance Analysis
Somesan, Liviu Emilian; Technical University of Cluj-Napoca, Romania - Padurariu, Emil; Technical University of Cluj-Napoca, Romania - Viorel, Ioan Adrian; Technical University of Cluj-Napoca, Romania

Formato:	,
Enlaces:	In this paper an analytical sizing-design procedure for a typical permanent magnet flux-switching machine (PMFSM) with 12 stator and respectively 10 rotor poles is presented. An optimal design, based on Hooke-Jeeves method with the objective functions of maximum torque density,…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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Evaluation of the Harmonic Impedance of Frydlant (Line 53) Power Network
Ali, Shehab Abdulwadood; University of Aden - Bodor, Alfred; EnerGoConsult CB, s.r.o.

Formato:	,
Enlaces:	The harmonic impedance of the power system is an important quantity, which describes the behaviour of the power system with the existence of different frequencies beside the fundamental. The harmonic study belongs to the most difficult part of the electrical…
Fecha:	2013-09-24
Recurso:	Advances in Electrical and Electronic Engineering

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Common-cause Failures as Major Issue in Safety of Control Systems
Ilavsky, Juraj; Siemens s.r.o., CEE RU-SK IC-MOL RA ECZ - Rastocny, Karol; University of Zilina - Zdansky, Juraj; University of Zilina

Formato:	,
Enlaces:	In order to gain an improvement of safety or availability measures of the safety-relevant control system through employment of redundancy a redundant system has to comply with the requirement on independence of redundant parts. If the requirements on the independence…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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10.

Modelling of H.264 MPEG2 TS Traffic Source
Klucik, Stanislav; Institute of Telecommunications Faculty of Electrical Engineering and Information Technology Slovak University of Technology in Bratislava Ilkovicova 3 Bratislava 812 19 Slovakia - Lackovic, Martin

Formato:	,
Enlaces:	This paper deals with IPTV traffic source modelling. Traffic sources are used for simulation, emulation and real network testing. This model is made as a derivation of known recorded traffic sources that are analysed and statistically processed. As the results…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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11.

Modeling of Telecommunication Cables for Gigabit DSL Application
Nevosad, Marek; Department of Telecommunication Engineering Faculty of Electrical Engineering, Czech Technical University in Prague Prague - Lafata, Pavel - Jares, Petr

Formato:	,
Enlaces:	The first part of our paper brings the description and analysis of method used for modeling of metallic cable’s parameters according to the modified KPN model. Moreover we were able to perform measurements and estimations for real metallic cable’s with…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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12.

Admission Control in IMS Networks
Chromy, Erik; Slovak University of Technology - Jadron, Marcel - Kavacky, Matej - Klucik, Stanislav

Formato:	,
Enlaces:	In our paper there is an emphasis on simulations of admission control methods in MATLAB environment. The main task of admission control method is to make a decision if the connection requiring network access should be accepted to the network…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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13.

Small Cell Network Topology Comparison
Oppolzer, Jan; Department of Telecommunication Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technicka 2 Prague 166 27 Czech Republic - Bestak, Robert

Formato:	,
Enlaces:	One of the essential problems in a mobile network with small cells is that there is only a limited number of (PCIs) available. Due to this fact, operators face the inevitable need for reusing (PCIs). In our contribution, we are…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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14.

Room Thermostat with Servo Controlled by PIC Microcontroller
Skapa, Jan; VSB-Technical University of Ostrava - Kramar, Petr

Formato:	,
Enlaces:	This paper describes the design of room thermostat with Microchip PIC microcontroller. Thermostat is designated for two-pipe heating system. The microprocessor controls thermostatic valve via electric actuator with mechanical gear unit. The room thermostat uses for its activity measurements of…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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15.

Influence of Thermal Treatment on Magnetic Properties of Steel Sheet Material Utilised in Cable Routing System
Usak, Elemir

Formato:	,
Enlaces:	The influence of relax annealing aimed at removal of the residual stresses (so-called stress-relief annealing) on various magnetic parameters, such as the relative magnetic amplitude permeability, coercivity, remanent flux density, etc. is discussed. Samples of steel cable tray material which…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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16.

Determination of Error Probability of Cryptography and Safety Codes for Safety-Related Railway Applications
Franekova, Maria; University of Zilina - Vyrostko, Marek; University of Zilina - Luley, Peter; University of Zilina

Formato:	,
Enlaces:	The paper deals with the problem of determination of error probability of cryptography and safety codes used within the safety-related railway applications with increasing safety integrity level (SIL). In the paper are also described requirements for cryptographic block code and…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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17.

Second Order Low-Pass and High-Pass Filter Designs Using Method of Synthetic Immitance Elements
Brandstetter, Pavel; VSB-Technical university of Ostrava - Klein, Lukas; VSB-Technical university of Ostrava

Formato:	,
Enlaces:	The paper briefly describes the basics of frequency filter design method using synthetic immittance elements with current conveyors. An introduction of the paper explains the advantages and also disadvantages of using this method. Other chapters briefly introduce a design process…
Fecha:	2013-03-30
Recurso:	Advances in Electrical and Electronic Engineering

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18.

Speed Estimation of Induction Motor Using Model Reference Adaptive System with Kalman Filter
Brandstetter, Pavel; VSB - Technical University of Ostrava Department of Electronics - Dobrovsky, Marek; VSB - Technical University of Ostrava Department of Electronics

Formato:	,
Enlaces:	The paper deals with a speed estimation of the induction motor using observer with Model Reference Adaptive System and Kalman Filter. For simulation, Hardware in Loop Simulation method is used. The first part of the paper includes the mathematical description…
Fecha:	2013-03-30
Recurso:	Advances in Electrical and Electronic Engineering

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19.

The Test of Organic Solvents Vapours Based on Commercial Tin Dioxide Gas Sensors
Gajdosik, Libor; VSB-technical university of Ostrava

Formato:	,
Enlaces:	This article describes the experiments carried out with the system of three tin dioxide gas sensors MQR 1003, TGS 822 and TGS 813, as well as the achieved results. Vapours of five industrial organic solvents were tested. The measurement values…
Fecha:	2013-06-30
Recurso:	Advances in Electrical and Electronic Engineering

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20.

Unsupervised Spelling Correction for Slovak
Hladek, Daniel; Department of Electronics and Multimedia Communications Faculty of Electrical Engineering Technical University of Kosice Park Komenskeho 13 042 00 Kosice Slovak Republic - Stas, Jan - Juhar, Jozef

Formato:	,
Enlaces:	This paper introduces a method to automatically propose and choose a correction for an incorrectly written word in a large text corpus written in Slovak. This task can be described as a process of finding the best matching sequence of…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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21.

Comparison among Models to Estimate the Shielding Effectiveness Applied to Conductive Textiles
Lopez, Alberto; Department of Telecommunication Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technicka 2 Prague 166 27 Czech Republic - Vojtech, Lukas - Neruda, Marek

Formato:	,
Enlaces:	The purpose of this paper is to present a comparison among two models and its measurement to calculate the shielding effectiveness of electromagnetic barriers, applying it to conductive textiles. Each one, models a conductive textile as either a (1) wire…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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22.

Availability Model for Virtualized Platforms
Hlavacek, Jiri; Department of Telecommunication Engineering Faculty of Electrical Engineering Czech technical university in Prague Prague - Bestak, Robert

Formato:	,
Enlaces:	Network virtualization is a method of providing virtual instances of physical networks. Virtualized networks are widely used with virtualized servers, forming a powerful dynamically reconfigurable platform. In this paper we discuss the impact of network virtualization on the overall system…
Fecha:	2013-11-19
Recurso:	Advances in Electrical and Electronic Engineering

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23.

Optimisation of Video-Data Transmission in Telematic System
Bubenikova, Emilia; University of Zilina - Holecko, Peter; University of Zilina - Pirnik, Rastislav; University of Zilina

Formato:	,
Enlaces:	The goal of this paper is to analyse, define, and summarise the requirements on networks connecting telematic technologies based on Intelligent Transport Systems (ITS). The paper describes the methodics of setting and a general concept of technological networks interface based…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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24.

Correlation between Objective and Subjective Methods Used for Video Quality Evaluation
Uhrina, Miroslav; Department of Telecommunications and Multimedia Faculty of Electrical Engineering, University of Zilina Zilina - Hlubik, Jan - Vaculik, Martin

Formato:	,
Enlaces:	The article deals with the correlation between the objective and the subjective methods. In the first part the short characteristic of the MPEG compression standards is written. The second part focuses on the objective metrics and the third part on…
Fecha:	2013-04-27
Recurso:	Advances in Electrical and Electronic Engineering

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25.

Semi-Smooth Newton Method for Solving 2D Contact Problems with Tresca and Coulomb Friction
Motyckova, Kristina; Ph.D. student Department of Applied Mathematics, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava - Kucera, Radek; Associated professor Centre of Excellence IT4I, VSB-Technical University of Ostrava

Formato:	,
Enlaces:	The contribution deals with contact problems for two elastic bodies with friction. After the description of the problem we present its discretization based on linear or bilinear finite elements. The semi--smooth Newton method is used to find the solution, from…
Fecha:	2013-06-30
Recurso:	Advances in Electrical and Electronic Engineering

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26.

WDM in Courses of Communication Technologies
Filka, Miloslav - Bernkopf, Miroslav

Formato:	,
Enlaces:	This conference paper shows and demonstrates how modern technologies (such as WDM – Wavelength Division Multiplex) were introduced to students of Optical Networks lectured at Brno University of Technology, Faculty of Electrical Engineering and Communication, Dept. of Telecommunications.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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27.

Epitaxial Layers of InP Doped With Rare Elements for Use in Radiation Detector
Kozak, Halyna - Sopko, Bruno - Zdansky, Karel

Formato:	,
Enlaces:	We have focused on the investigation of the impact of Ce, Eu, Tm, Eu2O3 and Tm2O3 addition in LPE growth process on the properties of InP layers in the context of their application in detector structures.
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

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28.

Science is a Part of the Culture
Turek, Ivan

Formato:	,
Enlaces:	The contribution points on relation between sciences and various aspects of the life of a society. The relation of physics and mathematics with technical disciplines is stressed. It is accented that technical education should be based on a mathematical and…
Fecha:	2011-06-29
Recurso:	Advances in Electrical and Electronic Engineering

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29.

Note on the Methodology of Measuring the Attenuation of Acustic Waves in Solid State
Sidor, Peter - Vajda, Drahoslav

Formato:	,
Enlaces:	The presented paper is a note on the methodology of measuring the attenuation of ultrasonic waves in the case of observation device not facilitating a direct measurement of the attenuation based on the definition of the ratio of amplitudes. Instead…
Fecha:	2011-06-29
Recurso:	Advances in Electrical and Electronic Engineering

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30.

Intermodal Interference as a Source of Information on Optical Fibres
Kacik, Daniel - Turek, Ivan - Martinecek, Ivan - Grendár, Drahomír

Formato:	,
Enlaces:	A basic description of intermodal interference which follows possibility investigation of intermodal interference in spectral and space region. There is also a brief description of equipments used for such investigation and some illustrations of obtained results. There is pointed in the…
Fecha:	2011-06-29
Recurso:	Advances in Electrical and Electronic Engineering

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31.

Four-Wave Mixing Aplication in Semiconductor Optical Amplifier
Odrobinak, Radoslav

Formato:	,
Enlaces:	Four-Wave Mixing (FWM) in semiconductor optical amplifiers is an attrative mechanism for wavelenght coversion in wavelenght-division multiplexed (WDM) systems since it provides modulation format and bit rate transparency over wide tuning ranges. A series of systems experiments evaluating several aspects…
Fecha:	2011-07-07
Recurso:	Advances in Electrical and Electronic Engineering

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32.

Diagnostics and Reconfiguration of Control Systems
Krokavec, Dusan - Filasova, Anna

Formato:	,
Enlaces:	This contribution summarizes some of the major trends, as well as real opportunities for the application of system fault diagnosis and reconfiguration control structures in automatic control systems. There are referenced ongoing concepts for residual generation, described design approaches in virtual reconfiguration…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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33.

Mathematical Model of Thyristor Inverter Including a Series-parallel Resonant Circuit
Luft, Miroslaw; Technical University of Radom - Szychta, Elzbieta

Formato:	,
Enlaces:	The article presents a mathematical model of thyristor inverter including a series-parallel resonant circuit with theaid of state variable method. Maple procedures are used to compute current and voltage waveforms in the inverter.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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34.

Possibilities of Genetic Algorithm Application in the Calculation of Power Networks Operation,
Rapsik, Miroslav - Altus, Juraj

Formato:	,
Enlaces:	The paper describes the possibilities of genetic algorithm application by the reactive power flows’ optimization in Slovak power transmission system. The methods of reactive power flow calculation and the utilization of genetic algorithms for their minimalization are indicated in the…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

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35.

Location in Mobile Networks Using Database Correlation (DCM)
Mada, Michal - Duha, Jan

Formato:	,
Enlaces:	The article presents one of the methods of location (DCM), which is suitable for using in urban environments, where other methods are less accurate. The principle of this method is in comparison of measured samples of signal with samples stored…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

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36.

High-Freqeuncy Analysis of Three-Winding Autotransformers 400/121/34 kV
Gutten, Miroslav - Brandt, Martin - Polansky, Roman - Prosr, Pavel

Formato:	,
Enlaces:	This article deals with a description of methods of an experimental analysis concerning the actual condition of windings and magnetic circuit of the autotransformer, which is required in power transmission companies all over the world.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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37.

Analysis of PMMT Operation for Renewable (PV/FC) Energy Source
Sul, Robert - Fibich, Peter - Frivaldsky, Michal

Formato:	,
Enlaces:	Utilization and construction of renewable energy sources require complexity of whole system. It is considered touse a set of devices that are necessary for energy conversion, accumulation, preparation and its distribution into electrical power supply network. The way of realization…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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38.

Advanced Ceramics Electronics Application
Trnka, Pavel - Bujalobokova, Magdalena

Formato:	,
Enlaces:	Ceramics materials infringe human life from early years of the humankind. Together with the progress of the science and engineering, various materials and technologies have been used. Suitable materials and technologies have been used in the proper applications. This paper…
Fecha:	2011-06-20
Recurso:	Advances in Electrical and Electronic Engineering

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39.

Using of the Modern Semiconductor Devices Based on the SiC
Drabek, Pavel

Formato:	,
Enlaces:	This paper deals with possibility of application of the semiconductor devices based on the SiC (Silicon Carbide) inthe power electronics. Basic synopsis of SiC based materials problems are presented, appreciation of their properties incomparison with current using power semiconductor devices…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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40.

The Assessment of Working Conditions of Traction Substation for Power and Reactive Energy
Wojciechowski, Jerzy - Lukasik, Zbigniew

Formato:	,
Enlaces:	In this paper, problems concerning the management of reactive power of DC traction substation have been discussed. The structure of traction system and its main elements has been sketched. Reactive power issue with respect to rectifier sets has been presented.…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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41.

Quality of Power Supply in European View
Prokop, Lukas - Hradilek, Zdenek

Formato:	,
Enlaces:	This paper deals with comparisons of situation in quality of power supply regulation in some of European countries, which are interested in CEER (Council of European Energy Regulators). Especially we focused our analysis on reliability indices, relationship between supplier and…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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42.

Estimates of Quantities in a Hall Effect Geodynamo Theory
de Paor, Annraoi M; NUI Dublin

Formato:	,
Enlaces:	Currents, resistances, dynamo constant, Hall voltage coefficient and inductances are estimated for the author’s geodynamo theory incorporating the Hall Effect. It is concluded that the Hall Coefficient in the bulk liquid core of the Earth is approximately 1.512x10-1, orders of…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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43.

Estimation of Energy Not Supply
Medvec, Zdenek - Prokop, Lukas

Formato:	,
Enlaces:	Damages in industrial company are raising during electrical interruption of power supply. These damages have usually different character and financial damages are most usual. Value of damage is nearly pertinent to type of industrial branch and working load of production…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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44.

Analysis of Setups of the Control of Rail Microprocessor Systems
Kornaszewski, Mieczyslaw - Lukasik, Zbigniew

Formato:	,
Enlaces:	In the article will have been introduced possibilities following from the application of the microprocessor technology in rail systems of the control of traffic will remain for example of modern signalling on railway crossings. Introduction to microcomputer and microprocessor systems…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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45.

Numerical Solution of Magnetostatic Field of Maglev System
Sobotka, Jaroslav

Formato:	,
Enlaces:	The paper deals with the design of the levitation and guidance system of the levitation train Transrapid 08 by means of QuickField 5.0 – a 2D program formagnetic electromagnetic fields solutions.
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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46.

Calculation of Forces Acting on Bars of Induction Machina
Hruska, Karel

Formato:	,
Enlaces:	This calculation is based on calculation of torque components of induction machines. Basic torque components are expanded, using knowledge of machine’s geometry, to the periphery of machine’s rotor. Using Fourier analysis of torque components it is possible to calculate forces…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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47.

Principles of Audio Watermarking
Hrncar, Martin - Krajcovic, Jan

Formato:	,
Enlaces:	The article contains a brief overview of modern methods for embedding additional data in audio signals. It could have many reasons - for the purposes of access control or identification related to particular type of audio. This secret information is…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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48.

Triple Play Service and IPTV Services Offered within it
Pajdusakova, Dagmar - Adamec, Bohumil

Formato:	,
Enlaces:	This paper deals with Triple Play multimedia service and figures its architecture. Triple Play offers voice, video and data services together in one customer connection. There is offered IPTV (Internet Protocol Television) service within this service, where we can include…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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49.

Influence of Electric Discharges on Bearings of Electric Machina
Foldyna, Jiri - Chmelik, Karel - Misak, Stanislav

Formato:	,
Enlaces:	Bearing currents are one of cause’s bearings faults. The character of a lubricator belongs to main factor influencing an inception of bearing currents. We have analyzed the electric character variety kind of lubricators; the influence of lubricators on a bearing…
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering

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50.

Overview of Distributed Control Systems Formalisms
Holecko, Peter

Formato:	,
Enlaces:	This paper discusses a chosen set of mainly object-oriented formal and semiformal methods, methodics, environments and tools for specification, analysis, modeling, simulation, verification, development and synthesis of distributed control systems (DCS).
Fecha:	2011-06-17
Recurso:	Advances in Electrical and Electronic Engineering