The Annals of the "Stefan cel Mare" University Electrical Section ISSN 1222-4316  -  No. 10 / 1998

Journal of the Faculty of Electrical  Engineering
Topics: computers science, control systems, electronics, electrotechnics, drive systems

Copyright © 1998 Faculty of Electrical Engineering "Stefan cel Mare" University of Suceava, Romania All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, photocopied, recorded or other wise, without written permission from the editor. When authors submit their papers for publication, they agree that the copyright for their article be transferred to the Faculty of Electrical Engineering, the "Stefan cel Mare" University of Suceava, Romania, if and only if the articles are accepted for publication. The copyright covers the exclusive rights to reproduce and distribute the article, including reprints and translations permission for other use. The copyright owner’s consent does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific written permission must be obtained from the Editor for such copying. Disclaimer. Whilst every effort is made by the publishers and editorial board to see that no inaccurate or misleading data, opinion or statement appear in this journal, they wish to make it clear that the data and opinions appearing 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]

 The Annals of the "Stefan cel Mare" University Electrical Section,  ISSN 1222-4316,   No. 10 / 1998
   EDITOR
  Adrian GRAUR   - Dean of the Faculty of Electrical Engineering
 
   ASSOCIATE  EDITORS
  ªtefan Gh. PENTIUC  - Scientific Secretary of the Faculty of Electrical Engineering
  Leon MANDICI   - Head of the Electrotechnique Dept.,Faculty of Electrical Engineering
  Dorel CERNOMAZU  - Faculty of Electrical Engineering
 
   EDITORIAL  BOARD
International
 Tudor AMBROS   - Chiºinãu Polytechnical Institute - MOLDAVIA
 Jao Paulo BAPTISTA  - Instituto Politecnico do Porto - PORTUGAL
 Oleg BREKHOV  - Moscow Aviation Institute - RUSSIA
 Luc DE BACKER  - Katholieke Hogeschool Sint-Lieven Gent - BELGIUM
 Liévin DEVOS     - Ecole Universitaire d'Ingénieurs de Lille - FRANCE
 H. EHRLICH                - Technical University Leipzig - GERMANY
 Eleftherios A. KAYAFAS - National Technical University of Athens - GREECE
 V. KRAPIVIN         - Moscow Institute of Radioengineering and Electronics - RUSSIA
 Vladimir MESYURA  - The State Technical University of Vinnitsa - UKRAINE
 Jean MIGNOT   - Université Franche - Comté, Besançon - FRANCE
 John MILNER         - City University London - GREAT BRITAIN
 Jose OLIVEIRA e SA  - Instituto Politecnico do Porto - PORTUGAL
 Carine NAESSENS  - Katholieke Hogeschool Sint-Lieven Gent - BELGIUM
 Yves PERRIARD   - Swiss Federal Institute of Technology - Lausanne - SWITZERLAND
 Nicola PITRONE  - Universita degli Studi Catania - ITALIA
 Jean Paul SIX       - Université des Sciences et Technologies de Lille - FRANCE
 F. SOPRONIUC          - University of Cernãuþi - UKRAINE
 Bernard TOURSEL   - Université des Sciences et Technologies de Lille - FRANCE
 Rodger ZIEMER  - Colorado Spring University - USA

National
 Dumitru N. ALEXANDRU - Technical University Iaºi
 Lorin CANTEMIR  - Technical University Iaºi
 Mihai CRETU   - Technical University Iaºi
 Ionel HAIDUC   - Technical University Cluj-Napoca
 Ioan JURCA   - University Tehnica Timiºoara
 Petru LEONTE   - Technical University Iaºi
 Ioan LETIA   - Technical University Cluj-Napoca
 Radu MUNTEANU  - Technical University Cluj-Napoca
 Costicã NITU      - University Politehnica Bucureºti
 Adrian PETRESCU - University Politehnica Bucureºti
 Mircea PETRESCU  - University Politehnica Bucureºti
 Alexandru VALACHI  - Technical University Iaºi
 

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 The Annals of the "Stefan cel Mare" University Electrical Section, ISSN 1222-4316,  No. 10 / 1998
 TABLE OF CONTENTS


FEE Info, Adrian GRAUR
4
Some Application Architectures for Realistic Image Synthesis in a Distributed Environment, Marius Dorian ZAHARIA 
5-9
L' Enseignement dans une environnement virtuel, Adina Magda FLOREA 
10-16
Générateur des systemes basés sur la représentation des connaissances par regles de production, Stefan-Gheorghe PENTIUC
17-22
SDFM - Multifunctional Distributed System for Control Process II, Cornel TURCU, Cristina TURCU, Vasile GAITAN, Valentin POPA
23-27
The Virtual Enterprise: Structuring and Revitalising the Corporation for the 21st Century, Beatrice STEFANESCU, Stefan ELIAN, Horaþiu COIFAN, Ciprian PAVEL,Daniel BLUMENFELD
28-33
Temperature Measurement by Measuring a Capacitor Charging Time , Alin Dan POTORAC 
34-38
A New Algorithm for Computing the Free Euclidian Distance of Trellis-Codes, Luminiþa SCRIPCARIU
39-42
A Variable Frequency Converter for High Operating Frequencies, Liviu TIGAERU,  Valentin POPA
43-46
Contributions en Réalisation des nouveaux Vibromoteurs, Dorel CERNOMAZU 
47-50
Monofazic Inverter with Switch - Off of Static Switch Through Break - Off of Power Flux 
and Sinewave Referen, Cornel PREPELIUC, M. LUCANU 
51
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FEE  Info

CONFERENCE ON  “DEVELOPMENT AND APPLICATION SYSTEMS”, SUCEAVA, 21 – 23 MAY 1998
 
 

The Faculty of Electrical Engineering organized the Fourth International Conference on “Development and Application Systems” attended by distinguished scholars from Romania, Germany, the United States of America, France, Russia, Italy, Belgium, Iran, Portugal and Moldavia. The papers presented covered the following areas:
 


The number of articles published in 1998 has increased by 10% as compared to 1996. To put it differently, 52 articles were written by Romanian scholars and 33 articles by foreign collaborators. Two articles were written in co-authorship.
The papers were published in the two volumes of our biennial publication entitled “Development and Application Systems” (ISSN 1222-7234).
 
 

                  Adrian GRAUR
 Dean of the Faculty of Electrical Engineering
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SOME APPLICATION ARCHITECTURES FOR REALISTIC IMAGE SYNTHESIS IN A DISTRIBUTED ENVIRONMENT

Marius Dorian ZAHARIA
POLITEHNICA University Bucharest
str. Splaiul Independentei, nr. 313, 77206 Bucharest
E-mail: zaharia@cs.pub.ro

Abstract. The classical methods used to realistically render 3D scenes are “ray tracing” and “radiosity”. These methods are known for the huge amount of processor time they require in order to obtain high resolution, true colour images. The paper describes three application architectures suitable to be used to accelerate the image synthesis process. This study will be used to build an adequate application architecture for a distributed realistic image synthesis system that will be developed at the Computer Science Department of POLITEHNICA University Bucharest.
Keywords: image synthesis, global illumination algorithms, ray tracing, radiosity, parallel algorithms, distributed computing.

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L' ENSEIGNEMENT DANS UNE ENVIRONEMENT VIRTUEL

Adina Magda FLOREA

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GÉNÉRATEUR DES SYSTEMES BASÉS SUR LA REPRÉSENTATION DES CONNAISSANCES PAR REGLES DE PRODUCTION

Stefan - Gheorghe PENTIUC
"Stefan cel Mare" University of Suceava
str. Universitatii nr.1. RO-5800,Suceava
E-mail: pentiuc@eed.usv.ro
 

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SDFM - MULTIFUNCTIONAL DISTRIBUTED SYSTEM FOR CONTROL PROCESS II

Cornel TURCU
Cristina TURCU
Vasile GAITAN
Valentin POPA

"Stefan Cel Mare" University of Suceava
str. Universitatii nr.1. RO-5800-Suceava
E-mail: {cturcu, cristina, vgaitan, valentin}@eed.usv.ro
 

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  THE VIRTUAL ENTERPRISE: STRUCTURING AND REVITALIZING THE CORPORATION FOR THE 21st CENTURY
 

Beatrice ªTEFANESCU
IT Services Group S.A. Suceava, Romania,
email: ssi.sv@bx.logicnet.ro

ªtefan ELIAN
Research Institute for Informatics, Bucharest, Romania
email: elian@u3.ici.ro

Horaþiu COIFAN,
Ciprian PAVEL,
Daniel BLUMENFELD,
Research Institute for Informatics, Bucharest, Romania

Abstract. Changing market demands, globalisation of markets, and the introduction of new technologies, especially ICT lead to new ways of working. One example is collaboration between organisations for the duration of a project to be able to flexibly react to customer and market demands. Such collaborations are currently called Virtual Enterprises.
In practice, such collaboration projects often run out of time and budget. A frequently mentioned cause for this phenomenon is that collaboration and communication is far from optimal. Management tools to improve collaboration and communication are, however, still lacking often leading to ad-hoc or even wrong decisions.
 In this paper, we present an approach to developing tools to support management of Virtual Enterprises to organise, manage, and improve the work needed to achieve the goals set. We especially focus on a model to support the analysis of Virtual Organisations. The model is part of the deliverables of the Esprit project FREE (Fast Reactive Extended Enterprise). The model focuses on the creation of conditions for collaboration and communication.
The FREE project  has the goal to develop management tools which guidelines to improve the way of working in a Virtual Enterprise. An additional goal is to extensive knowledge on (human) resource requirements in a fast reactive n cultural/lingual environment, communication and collaboration requirements, and organisational arrangements in such an environment.

Keywords: virtual enterprise, management, marketing, VIVE, FREE, SME

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TEMPERATURE MEASUREMENT BY MEASURING A CAPACITOR CHARGING TIME

Alin Dan POTORAC
"Stefan Cel Mare" University of Suceava
str. Universitatii nr.1. RO-5800-Suceava
E-mail: alinp@eed.usv.ro
 

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A NEW ALGORITHM FOR COMPUTING THE FREE EUCLIDIAN DISTANCE OF TRELLIS-CODES

Luminiþa SCRIPCARIU
 

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  A VARIABLE FREQUENCY CONVERTER FOR HIGH OPERATING FREQUENCIES

Liviu TIGAERU,  Valentin POPA

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CONTRIBUTIONS EN RÉALISATION DES NOUVEAUX VIBROMOTEURS

Dorel CERNOMAZU

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MONOFAZIC INVERTER WITH SWITCH - OFF OF STATIC SWITCH THROUGH BREAK - OFF OF POWER FLUX AND SINEWAVE REFEREN

Cornel PREPELIUC, M. LUCANU

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The Annals of the "Stefan cel Mare" University Electrical Section,  ISSN 1222-4316,   No. 10 / 1998
 DISTRIBUTION NETWORK
The issues of the journal are distributed in 22 University Libraries from Belgium, France, Germany, Great Britain, Greece, Italy, Moldavia,  Portugal, Romania, Russia, Ukraine and USA


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 Informatique 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 State Technical University 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 
LONDON EC1V 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 Austin Bluffs Pkwy 
CO 80907 
USA
Texas Cristian University
University Library
BOX 32886, FORT WORTH
76 129 Texas 
USA
National Technical University of Athens
University Library 
ZOGRAPHON 
ATHENS 15773 
GREECE
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 Craiova
Biblioteca universitara 
CRAIOVA
Biblioteca Centrala Universitara
CLUJ - NAPOCA
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The Annals of the "Stefan cel Mare" University Electrical Section ISSN 1222-4316  -  No. 9 / 1998

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

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