Advances in Electrical and Computer Engineering 1/2006

Advances in Electrical and Computer Engineering
ISSN 1582-7445 - Volume 6 (13), Number 1 (25), 2006

Journal of the Romanian Academy of Technical Science of Romania and ‘Stefan cel Mare’ University of Suceava

Publisher ‘Stefan cel Mare’ University of Suceava

Topics: computers science, control systems, electronics, electrotechnics, drive systems

Information for Authors

Advances In Electrical And Computer Engineering is a peer-reviewed publication. It is published biannually by the Academy of Technical Sciences of Romania and the "Stefan cel Mare" University of Suceava, Romania.
All articles must be in English. They must not be under consideration for publication elsewhere and they must not have been previously published.

The scope of the journal covers: computer science, artificial intelligence, pattern recognition, knowledge engineering, process control theory and applications, distributed systems and computer networks, microcontroller-based industrial networks, electronics, telecommunications, data transmission, software engineering, energy converters, electrotechnics, electric machines modeling and design, control of electric drive systems, non-conventional energy conversion, optimization techniques in electrical power systems, sensors, transducers modeling and design.

Copyright. It is the policy of the journal to own the copyright of the articles it publishes. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations.
No part of this publication may be reproduced, stored in a retrieval system or photocopied without the written permission from the editor.

Disclaimer. Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that all information and opinions formulated in the articles, as well as linguistic accuracy, are the sole responsibility of the author.

The papers may be requested by e-mail directly to their authors with respect of the above copyright conditions !

[TABLE OF CONTENTS] [Issues on Internet] [DISTRIBUTION NETWORK][EDITORIAL BOARD] [(e)MAIL]

Advances in Electrical and Computer Engineering
ISSN 1582-7445 - Volume 6 (13), Number 1 (25), 2006

EDITOR-IN-CHIEF

Adrian GRAUR - “Stefan cel Mare” University of Suceava, Romania

ASSOCIATE EDITORS

Ştefan Gh. PENTIUC - “Stefan cel Mare” University of Suceava, Romania
Leon MANDICI - “Stefan cel Mare” University of Suceava, Romania
Dorel CERNOMAZU - “Stefan cel Mare” University of Suceava, Romania

EDITORIAL BOARD

Tudor AMBROS   - Technical University of Chişinău, Moldavia
Dumitru N. ALEXANDRU   - Technical University Iasi, Romania
Oleg BREKHOV   - Moscow Aviation Institute, Russia
Mihai CERNAT - "Transilvania" University Brasov, Romania
Cristophe CHAILLOU   - Universite des Sciences et Technologies de Lille, France
Mihai CRETU   - Technical University Iaşi, Romania
Luc DE BACKER   - Katholieke Hogeschool Sint-Lieven Gent, Belgium
Timothy HALL   - University of Limerick, Ireland
Ileana HAMBURG   -Institute for Technology Gelsenkirchen, Germany
Stefan HOLBAN   - "Politehnica" University Timisoara, Romania
Maria G. IOANNIDES   - National Technical University of Athens, Greece
Ioan JURCA   - "Politehnica" University Timisoara, Romania
Vladimir KATIC - University of Novi Sad, Serbia
Eleftherios A. KAYAFAS   - National Technical University of Athens, Greece
Mykola KIRICHENKO   - Institute of Cybernetics Kiev, Ukraine
Valeriu KRAPIVIN   - Moscow Institute of Radioengineering and ELectronics, Russia
Ioan LETIA   - Technical University Cluj-Napoca, Romania
Vladimir MESYURA   - State Technical University of Vinnitsa, Ukraine
John MILNER   - City University London - Great Britain
Radu MUNTEANU - Technical University Cluj-Napoca, Romania
Jose OLIVEIRA e SA - Instituto Politecnico do Porto, Portugal
Costică NITU   - "Politehnica" University Bucureşti, Romania
Adrian PETRESCU   - "Politehnica" University Bucureşti, Romania
Mircea PETRESCU - "Politehnica" University Bucureşti, Romania
Nicola PITRONE - Universita degli Studi Catania, Italia
Radu Emil PRECUP - "Politehnica" University Timisoara, Romania
Jean Paul SIX   - Université des Sciences et Technologies de Lille, France
Fedir SOPRONIUC   - University of Cernăuţi, Ukraine
Mircea STRATULAT - "Politehnica" University Timisoara, Romania
Gavril TODEREAN - Technical University Cluj-Napoca, Romania
Petru TODOS   - Technical University of Chisinau, Moldavia
Bernard TOURSEL   - Université des Sciences et Technologies de Lille, France

Advances in Electrical and Computer Engineering
ISSN 1582-7445 - Volume 6 (13), Number 1 (25), 2006

TABLE OF CONTENTS


Simulation Analyses of Pattern Formation Processes of Chemotactic Bacterial Colonies in Semi-Solid Media, Masaaki ISHIKAWA	2-7
Magnetism in Two Dimensions: An Important Step for the Study of Superconductors and Magnetic Semiconductors, Jacques CURÉLY	8-14
Study of Magnetic and Electronic Ballasts, WimDE GEEST, Jean-Pierre GOEMAERE	15-14
EMC of Electrical Systems – Electromagnetic Coupling ( Part I. ), Irena KOVÁČOVÁ, Dobroslav KOVÁČ	20-26
A New Method for Lamp’s Radiated Disturbances Emission Measurement in 30 MHz - 300 MHz Bandwidth, Robert ISTOK	27-29
Model-Based Development of Embedded Software Systems with Components, Nicolae MARIAN	30-38
A System for Monitoring Well Logging Parameters, Daniel MIHAJLOVIĆ, Ivan MEZEI, Miodrag BRKIĆ, Miloš ŽIVANOV, Miloš SLANKAMENAC	39-41
A Survey of Inverse Differential Manchester Coding, Nicolae Dumitru ALEXANDRU	42-44
Advances in Perceptual Quality Measurements Applied to Voice Over Ip (Voip) Networks, Dorel PICOVICI, John NELSON	45-50
Development of a Universal Hardware Platform for Wireless Communication, Luc DE BACKER, Lieven DE STRYCKER, Jean-Pierre GOEMAERE, Koen VANDECASTEELE, Wim VAN HOUCKE	51-53
A Hardware Implementation Of Safe Petri Net Models, Viorica SUDACEVSCHI, Victor ABABII, Valentin NEGURA	54-58
Semantic Web Technologies in the Context of Agent Applications. From Design to Practical Deployment, Sabin-Corneliu BURAGA	59-65
Intelligent Resource Management in Mobile Computing, Mihai Horia ZAHARIA, LeonFLORIN, Cristian BUŢINCU	66-69
Shaping Mobile Wireless Services for Disabled: The Role of Scenarios and Foresight Studies, Ileana HAMBURG, Thorsten BUSSE	70-74
Simulation of Two-Rate Neural Network Control for Stochastic Model of an Experimental Aircraft, Igor ASTROV, Sergei TATARLY, Svetlana TATARLY	75-83
The Role of e-Learning and Higher Education Institutions in Development of Competencies for SMEs in Europe, Ileana HAMBURG, Oleg CERNIAN	84-88

Simulation Analyses of Pattern Formation Processes of Chemotactic Bacterial Colonies in Semi-Solid Media

MasaakiISHIKAWA
YamaguchiUniversity
2-16-1 Tokiwadai, Ube, Yamaguchi, Japan
ishi@yamaguchi-u.ac.jp

Abstract—Many kinds of spatio-temporal patterns appear in various fields of engineering including chemical and biological engineering. Among such spatio-temporal patterns, analyses of patterns created by the so-called self-organization are very important as basic problems in engineering, mainly because analyses of the spatio-temporal patterns in phase transitions of polymeric materials are essential to develop new materials and the analyses of epidermal patterns of animals and seashell patterns shed light on mystery in biology. In this paper, focusing on the chemotactic bacterial colony patterns as the spatio-temporal patterns created by the self-organization, we study the influence of the random disturbance on the colony formations.
Index Terms—Chemotaxis, colony formations, E. coli, numerical simulations, semi-solid media, stochastic reaction diffusion systems, S. typhimurium.

Magnetism in Two Dimensions: An Important Step for the Study of Superconductors
and Magnetic Semiconductors

Jacques CURÉLY
Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux 1
351 Cours de la Libération, F-33405 Talence Cedex, France
j.curely@cpmoh.u-bordeaux1.fr

Abstract—We use a general formalism previously developed for the 2D classical Heisenberg square lattice. We recall the closed-form expressions derived for the thermodynamic quanti-ties of main interest, notably the correlation length and the dy-namic and static susceptibilities. The theoretical model allows one to fit correctly the experimental correlation length of the well-known compound Rb2MnF4 and the experimental suscep-tibility data of the recently synthetized antiferromagnet ??Mn(minc)2(N3)2?n? characterized by a 2D classical square lattice (where “minc” is the abbreviation for the ligand methyl isonicotinate).

Index Terms—Ferrimagnetism, Heisenberg coupling, magnetic semiconductors, superconductors.

Study of Magnetic and Electronic Ballasts

WimDE GEEST¹, Jean-Pierre GOEMAERE²
“KaHo Sint Lieven” Department Industrieel Ingenieur G.Desmetstraat.1, B-9000 GENT
¹ wim.degeest@kahosl.be, ²jeanpierre.goemaere@kahosl.be

Abstract—This study compares the working principal and properties of magnetic and electronic ballasts used for fluorescent lamp lighting. A circuit simulation illustrates the benefit of a Power Factor Controller in electronic ballasts. Some comments are made on basic porperties as dimmability and efficiency.

Index Terms—Dimming, electronic ballasts, fluorescent lamp, magnetic ballasts, Power Factor Controller.

EMC of Electrical Systems – Electromagnetic Coupling ( Part I. )

Irena KOVÁČOVÁ¹, Dobroslav KOVÁČ ²
¹ Department of Electrical Drives and Mechatronics, Technical University of Košice
Letná 9, 042 00 Košice, SlovakRepublic
Irena.Kovacova@tuke.sk

² Department of Theoretical Electrical Engineering and Electrical Measurement,
TechnicalUniversity of Košice
Park Komenského 3, 042 00 Košice, SlovakRepublic
Dobroslav.Kovac@tuke.sk

Abstract—The paper deals with the general analysis of one part of the electromagnetic compatibility (EMC) problem - the electromagnetic coupling applied in the field of power electrical systems. Theoretical analysis of above mentioned problem, based on the impact investigation of the electromagnetic wave propagation, is described in part I. Obtained results can be used for predictive stating of EMC quality of individual new electrotechnical products.

Index Terms—Electromagnetic compatibility, electromagnetic coupling, electrical drives, electrical systems.

A New Method for Lamp’s Radiated Disturbances Emission Measurement
in 30 MHz - 300 MHz Bandwidth

RobertISTOK
BudapestUniversity of Technology and Economics
Group of High Voltage Engineering and Equipment
1111 Budapest, Egry József u. 18.
V1. épület I em.
ristok@freemail.hu

Abstract—This paper presents a new method for lamp’s radiated disturbance emission measurement in 30 MHz – 300 MHz bandwidth.This method is based on the CDN method which uses the corelation between radiated and conducted RF emission. The method which is presented in this paper eliminates every measurement mistake which is produced by the electromagnetic environment.

Index Terms—Coupling decoupling network method, lamps, lighting equipment, radiated disturbance emission.

Model-Based Development of Embedded Software Systems with Components

Nicolae MARIAN
"Mads Clausen Institute for Product Innovation", University of Southern Denmark
Grundtvigs Alle 150, DK-6400, S?nderborg, Denmark
nicolae@mci.sdu.dk

Abstract—The widespread use of control, or recently coined mechatronic, systems mandates a rigorous engineering approach towards embedded software development, i.e. model-based development using repositories of prefabricated software components. The main problem that has to be addressed in this context is to systematically develop the software framework for mechatronic applications, taking into account the true nature of them, which are predominantly continuous-time/discrete-event processes, hierarchical and concurrent systems. The implications of the adopted modelling technique by integration of component-based design and verification are discussed in the context of mechatronic domain systems. The result is a hierarchical-modular signal flow metamodel in which process and control tasks are clearly differentiated. The results have been used to formulate the guidelines used to develop COMDES - a software development framework for distributed component modelling of mechatronic real-time applications.

Index Terms—Distributed control, modelling, real-time systems, software engineering.

A System for Monitoring well Logging Parameters

Daniel MIHAJLOVIĆ¹, Ivan MEZEI², Miodrag BRKIĆ³, Miloš ŽIVANOV⁴, Miloš SLANKAMENAC⁵
"Faculty of Technical Sciences" University of Novi Sad, Department of electronics,
Trg D. Obradovića 6, 21000 Novi Sad, Serbia & Montenegro
¹dmihajlovic@uns.ns.ac.yu, ²imezei@uns.ns.ac.yu, ³mbrkic@uns.ns.ac.yu, ⁴mzivanov@uns.ns.ac.yu, ⁵miloss@uns.ns.ac.yu

Abstract—Borehole measurement systems are used for measuring parameters in borehole exploration facilities. Measuring methods include the use of various sophisticated tools that are descended into boreholes. Various parameters are to be monitored in order to avoid damaging expensive equipment. These parameters include tool speed, depth, cable tension and tool tip differential tension. These parameters can be analized offline using log file. This paper presents a solution which meets the requirements for monitoring and displaying these parameters on the borehole site.

Index Terms—Acquisition, logging, measurement system, monitoring, well.

A Survey of Inverse Differential Manchester Coding

Nicolae Dumitru ALEXANDRU
“Gh. Asachi” Technical University of Iaşi
Department of Telecommunications
Bd. Carol I no 11, 700506 - Iaşi, ROMANIA
nalex@etc.tuiasi.ro

Abstract—An improved encoder circuit that operates at any frequency is presented. As no one shot circuits are used, its operation is extended to higher values of the frequency, as compared with a previous approach [1]. This results in improved reliability of the circuit operation. An exact formula describing the coding factor of inverse differential Manchester code in terms of normalized frequency and probability p of a mark at the coder input is derived using a Mealy-type finite-state-machine approach. The low-frequency asymptote is determined as a function of the probability p.

Index Terms—Encoder circuit, inverse differential Manchester, line code, low-frequency asymptote, power spectral density, practical implementation.

Advances in Perceptual Quality Measurements Applied to Voice Over IP (Voip) Networks

Dorel PICOVICI¹, John NELSON²
WirelessAccessResearchCentre
University of Limerick
Ireland
¹Dorel.Picovici@ul.ie, ²John.Nelson@ul.ie

Abstract—In a highly competitive telecommunication market where price differences have been minimised, quality of service (QoS) has become a critical differentiating factor. In the context of telecommunication systems, QoS is defined as the collective effect of service performance, which determines the degree of a user’s satisfaction with the service. Voice communication quality is one of the most visible and important aspects for QoS. Since voice quality is not generally guaranteed in an IP network, the ability to monitor and design for this quality is a top priority. From the point of view of ensuring quality design and management, methodologies for perceptual measurements for voice over IP (VoIP) networks are essential. This article reviews the development of perceptual quality measurements as mainly applied to VoIP networks.

Index Terms—Perceptual quality measurements, voice quality, VoIP networks.

Development of a Universal Hardware Platform for Wireless Communication

Luc DE BACKER¹, Lieven DE STRYCKER², Jean-Pierre GOEMAERE³, Koen VANDECASTEELE⁴, Wim VAN HOUCKE⁵
"KaHo Sint-Lieven" Technical University
Gebroeders Desmetstraat nr. 1, B-9000 Gent,
¹luc.debacker@kahosl.be, ²lieven.destrycker@kahosl.be, ³jeanpierre.goemaere@kahosl.be
⁴dramco@kahosl.be, ⁵wim.vanhoucke@kahosl.be

Abstract—As Wireless Personal Area Network (WPAN) standards, such as Bluetooth, Zigbee, RFID become more common, it might be interesting to improve the functionality of existing products by adding a wireless interface. To test the possibilities and limitations of the different standards, a universal hardware platform which supports different wireless standards is a handy tool. In this work a hardware platform that allows rapid prototyping and fast evaluation is described. The platform allows implementing both the functionality of the existing product and the wireless standard of interest. For the implementation of the standardized wireless interface, RF extension boards are plugged onto the universal hardware platform and the required software libraries are provided.

Index Terms—Development platform, FPGA, microcontroller, WPAN.

A Hardware Implementation of Safe Petri Net Models

Viorica SUDACEVSCHI¹, Victor ABABII², Valentin NEGURA³
Technical University of Moldova
Str. Stefan cel Mare, 168, Chisinau
Republic of Moldova
¹ svm@mail.utm.md, ²avv@mail.utm.md, ³vnegura_md@yahoo.fr

Abstract—In this work is proposed a hardware implementation method of Safe Petri Net model (SaPN). The processing structure presents an interaction between homogeny processing elements functional defined. On dependence of interconnections of elements, there can be implemented any complexity of Safe Petri Net model. The processing elements represent a flexible architecture, which permit to adjust them to Safe Petri Net model. Using this architecture and interactions of elements we obtained a reduced time of processing to checking Safe Petri Net to reachability, viability and other behavior properties.

Index Terms—AHDL, FPGA, parallel data processing, Petri Net models hardware implementation, Safe Petri Net.

Semantic Web Technologies in the Context of Agent Applications. From Design to Practical Deployment

Sabin C. Buraga
Faculty of Computer Science, "Al.I.Cuza" University of Iasi
Department of Theoretical Computer Science and Distributed Systems,
busaco@infoiasi.ro

Abstract—The paper presents several original studies on using semantic Web technologies in the context of agent-oriented applications. We detail two multi-agent platforms (Omega and ADF) and their pragmatic deployment for semi-structured search of documents and semantic-enriched collaboration between Web entities.

Index Terms—Cooperative systems, Distributed computing, Resource management.

Intelligent Resource Management in Mobile Computing

Mihai Horia ZAHARIA¹, Leon FLORIN², Cristian BUŢINCU³
“Gh. Asachi” Technical University
Bd.-ul D. Mangeron 53 A, RO-700050, Iaşi
¹mike@cs.tuiasi.ro, ² florinleon@gmail.com, ³cbutincu@yahoo.com

Abstract—In this paper an intelligent agents based framework for resource management in mobile computing will be presented. It consists from dedicated class of mobile agents. Those agents will handle the dynamic routing, resource costs, computing and load balancing problems. Also the security is specially managed because of increased risks that wireless communication provides.

Index Terms—Cooperative systems, resource management, distributed computing.

ShapingMobile Wireless Services for Disabled: The Role of Scenarios and Foresight Studies

Ileana HAMBURG¹, Thorsten BUSSE²
Institut Arbeit und Technik, Wissenchaftszentrum Nordrhein-Westfalen,
Gelsenkirchen, Germany
¹hamburg@iatge.de, ²jt_thorsten@yahoo.de

Abstract—Many people with disabilities are on the wrong side of the digital divide and are over-represented amongst the groups most likely to be excluded from the internet and wire-less technologies. Services based on such technologies could be an extremely useful resource for disabled people but the shape of them is a complex process. In this paper we present foresight studies and particularly scenarios as tools for shaping mobile wireless services for disabled people and give some examples.

Index Terms—Foresight studies, mobile computing, scenar-ios, services for disabled.

Simulation of Two-Rate Neural Network Control for Stochastic Model of an Experimental Aircraft

Igor ASTROV¹, Sergei TATARLY², Svetlana TATARLY³
Department of Computer Control, Tallinn University of Technology
Ehitajate tee 5, 19086 Tallinn, Estonia, EU
¹igor.astrov@dcc.ttu.ee, ²sergei.tatarly@dcc.ttu.ee, ³svetlana.tatarly@dcc.ttu.ee

Abstract—The nature of the multi-rate dynamics of the process makes it very attractive for applications, since the multi-rate phenomena are complex. This paper presents a research methodology for describing a two-rate stochastic control system as a state-space (SS) type decomposed models of multi-input/multi-output (MIMO) stochastic subsystems with the "fast" and "slow" neural networks (NNs) control structures. An illustrative example from the aircraft industry – decomposed two-rate NN control of stochastic model of a tracking system for an experimental aircraft – was carried out using the proposed two-rate SS decomposition technique. The results of decomposition of an original stochastic system on two-rate autonomous subsystems are tested with the help of the block diagrams of functioning for the given original control system with single linear-quadratic-Gaussian controller (LQGC) and for the two-rate control system with six neural network reference controllers (NNRCs). This example demonstrates that this research technique results in simplified low-order MIMO autonomous subsystems with various discretization periods and with various speeds of actuation, and shows the quality of the proposed technique. The simulation results with use of software package Simulink demonstrate that this research technique would work for real-time MIMO stochastic systems.

Index Terms—Aircraft control, models, multi-rate, neural networks, simulation.

The Role of e-Learning and Higher Education Institutions in Development of Competencies for SMEs in Europe

Ileana HAMBURG¹, Oleg CERNIAN²
¹Institut Arbeit und Technik, Wissenchaftszentrum Nordrhein-Westfalen,
Gelsenkirchen, Germany
hamburg@iatge.de

²University of Craiova,Computer Department
200585 - Romania
cernian@ucv.ro

Abstract—Many SMEs lack the time and competencies to use strategically information technologies (IT) and e-Learning platforms in order to be successful on the market. In this pa-per, after a brief presentation of some challenges in the devel-opment of competencies in European enterprises, in the use of e-Learning platforms to form competencies as well as in the role of higher education institutions for covering this necessity, there are given some examples of European projects tackling such topics.

Index Terms—Competencies for SME’s needs, e-Learning, European projects, vocational higher education.

Advances in Electrical and Computer Engineering
ISSN 1582-7445 - Volume 6 (13), Number 1 (25), 2006
DISTRIBUTION NETWORK
The issues of the journal are distributed in 30 University Libraries from Belgium, France, Germany, Great Britain, Greece, Ireland, Italy, Moldavia, Portugal, Romania, Russia, Ukraine, USA and Yugoslavia

Universite des Sciences et Technologies de Lille Bibliotheque Universitaire Centrale Cite Scientifique Av. Henri Poincaré BP155 59653 Villeneuve d’Ascq Cedex FRANCE

Universitatea Tehnica a Moldovei Biblioteca universitara Bd. Stefan cel Mare 168 277012 CHISINAU Republica Moldova
Laboratoire d'Informatique Fondamentale de Lille Bibliotheque Batiment M4 Cite Scientifique 59655 Villeneuve d’Ascq Cedex FRANCE	University of Cernautzi University Library Ul. Kocjubinskogo 2 274012 CERNOVCY UKRAINE
L2EP E.C. Lille Batiment P2 Cite Scientifique BP 48 59655 Villeneuve d’Ascq Cedex FRANCE	The StateTechnicalUniversity of Vinnitsa University Library 95, Khmelnitska shore 286021 VINITSA UKRAINE
KAHO Katholieke Hogeschool Sint-Lieven Gent Gebroeders Desmetstraat 1 B-9000 GENT BELGIUM	Moscow Aviation Institute Library Volo Kolamskoye chosse 4 125 871 MOSCOW RUSSIA
Universita degli Studii di Catania Dipartimento Elettrico Elettronico e Sistemistico V.le A.Doria, 6 95125 CATANIA ITALY	Moscow Institute of Radioengineering and Electronics Institute Library Pr. Vernadskogo 78 117 454 MOSCOW V454 RUSSIA
Instituto Superior de Engenharia do Porto (ISEP) Biblioteca (Library) Rua S. Tome 4200 PORTO PORTUGAL	CITY UNIVERSITY University Library Northampton Square LONDONEC1V 0HB GREAT BRITAIN
Universite de Franche Comte Bibliotheque Universitaire 30, Avenue de l’Observatoire 25030 BESANCON Cedex Belfort FRANCE	University of Colorado University Library COLORADO SPRING 1420 AustinBluffs Pkwy CO80907 USA
TexasCristianUniversity University Library BOX 32886, FORT WORTH 76 129 Texas USA	NationalTechnicalUniversity of Athens University Library ZOGRAPHON ATHENS 15773 GREECE
University of Limerick Limerick IRELAND	Institut Arbeit und Technik Gelsenkirchen GERMANY
University of Novi Sad Novi Sad YUGOSLAVIA	Institute for Cybernetics Kiev UKRAINE
Universitatea "Politehnica" Bucuresti Biblioteca universitara BUCURESTI	Biblioteca Centrala Universitara BUCURESTI
Universitatea Tehnica "Gh. Asachi" Iasi Biblioteca universitara 6600 IASI	Universitatea Tehnica Cluj-Napoca Biblioteca universitara 26, G.Baritiu RO-3400 CLUJ- NAPOCA
Universitatea Tehnica din Timisoara Biblioteca universitara TIMISOARA	Biblioteca Centrala Universitara IASI
Universitatea din Oradea Biblioteca universitara ORADEA	Universitatea din Galati Biblioteca universitara GALATI
Universitatea din Craiova Biblioteca universitara CRAIOVA	Biblioteca Centrala Universitara CLUJ - NAPOCA

Advances in Electrical and Computer Engineering
ISSN 1582-7445 - Volume 6 (13), Number 1 (25), 2006

Subscription and Paper Submission

Mail
prof. Adrian GRAUR
Faculty of Electrical Engineering
The "Stefan cel Mare" University of Suceava,
str.Universitatii nr.1
RO-5800 SUCEAVA
Romania

e-mail: adriang@eed.usv.ro