National
 Lorin CANTEMIR  - Technical University Iaşi
 Mihai CRETU   - Technical University Iaşi
 Ionel HAIDUC   - Technical University Cluj-Napoca
 Ioan JURCA   - University Tehnica Timişoara
 Petru LEONTE   - Technical University Iaşi
 Ioan LETIA   - Technical University Cluj-Napoca
 Radu MUNTEANU  - Technical University Cluj-Napoca
 Costică NITU      - University Politehnica Bucureşti
 Adrian PETRESCU - University Politehnica Bucureşti
 Mircea PETRESCU  - University Politehnica Bucureşti
 Alexandru VALACHI  - Technical University Iaşi
 

  Back to top

Abstract. The paper describes the main concepts and tools used by scientific visualisation, a technology for improving the man machine interface. It is a field of application that was rapidly growing in the last years through the development of new algorithms, new theoretical approaches and interface technologies.
Keywords: scientific visualisation, data models, visualisation pipeline, data visualisation.

  Back to top

Beatrice STEFANESCU
IT Services Group S.A. Suceava, Romania,
 E-mail: ssi.sv@bx.logicnet.ro

Stefan ELIAN
Research Institute for Informatics, Bucharest, Romania
E-mail: elian@u3.ici.ro

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

Abstract. Virtual Reality (VR) makes a relatively new realm in Information Technology (IT), a realm where computer science, optics, robotics and other scientific disciplines intertwine with each other to create a world which runs parallel to reality. To penetrate the virtual world is to acces a realm given birth by a lot of information witch is represented by the numerical data stored in a computer.

The virtual world elements of this application are either images of real, digitized elements (archives or recent photos, etches or drawings in archives documents, topographical maps, cadastre etc.) or files generated by a special purpose software. The VR uses computer to take man farther in the endless realm of knowledge. It makes him-at last -be almost instantly anywhere and anytime in space and time. The VR has the capability of compacting time and space, and of rendering them to every human being, to those who are willing to or must be back or aheadof time.

This paper aimed to present some of the VR applications. These applications are concerned with the virtual worlds synthesis and exploration. The paper is to make a modest contribution to the VR application to the cultural monuments restorement, namely the virtual restorement of the Princely Citadel of Suceava.

Keywords: virtual reality, interaction, immertion, reconstruction, 3D modeling.

   Back to top

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

Daniel AGA, Robert HALIUC, Marinela P. AGA, Mihaela CIUTAC
The Informatics Services Company S.A. Suceava

Abstract. The Open Distance Education System (ODES) represents an adequate answer to the educational needs of enterprises and individuals. Based on Information and Communication Technologies this form of education ensure a long live education, not simple cycles of work and up-date period. The main features of the ODES consist in the quasi-free organisation of training process (curriculum, scheduling, evaluation) and a personalised schedule of each student.
The aim of this paper is to present an auto-evaluation instrument that permits to the students to evaluate himself the quantity of knowledge that they acquired and receiving grades and rights to pass to the following step of their training trajectory. This instrument may be used in various domains, and was tested in a C programming language virtual class.

Keywords: Open Distance Learning, Distributed Systems

  Back to top

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

Abstract. This paper deals with a way of approaching a distributed control problemfrom a multi-agent system point view. Agents are autonomous entities capable of carryng out specific tasks by themselves or in  co-operation with other agents. Multi-agent systems offer a descentralised control model, use the mechanism of message passing for communications purposes, and are usually implemented from an object-oriented perspective. This is useful when the process is distributed on a large geographic area.

Keywords: Multi-agent system, Agents, Process control.

  Back to top

Valentin POPA
Cristina TURCU
Cornel TURCU
"Stefan Cel Mare" University of Suceava
str. Universitatii nr.1. RO-5800-Suceava
E-mail: valentin@eed.usv.ro
 

Abstract. This paper proposes the most performant unidimensional constellations for two-states Trellis-Coded Modulation (TCM) schemes for a bit rate R_b 1-4-bits/symbol. To obtain the rest schemes symmetric, asymetric unidimensional constellations have been compared and partially overlapped signal constellations have been introduced. For all these schemes simulation results are presented.

Keywords: TCM, asymmetric constellation, partially overlapped signals.

 Back to top

Valentin POPA
"Stefan Cel Mare" University of Suceava
str. Universitatii nr.1. RO-5800-Suceava
E-mail: valentin@eed.usv.ro

Abstract. This paper proposes the most performant bidimensional constellations for two-states Trellis-Coded Modulation (TCM) schemes, for a bit rate R_b 1-4-bits/symbol. Symmetric and asymmetric bidimensional constellations have been compared for low rates and partially overlapped signal bidimensional constellations have been introduced for high rates. For all these schemes simulation results are presented.

Keywords: TCM, two-states, bidimensional constellations, partially overlapped signals.

   Back to top

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

Keywords: linear opto-coupler, phone line interface, SPICE simulation

 Abstract. Knowing that the phone bill is an important problem of the phone users, the solution proposed here consists of a special phone line interface that allows to a processing unit to calculate the phone bill at the subscriber end. The interface is an analogic one, optical based. A particular configuration was developed in order to not disturb the phone line signals. To detect the different states of the line it is necessary to manage a special tone frequency, to "read" the dialed phone number and to have some timing information. With this data the processing unit can make the necessary calculus.
The paper focuses on the interface between the phone line and the processing unit.

Keywords: linear opto-coupler, phone line interface, SPICE simulation.

   Back to top

Dorel CERNOMAZU
Mihai RATA
Vasile ROSCA
"Stefan cel Mare" University of Suceava, 1 University Street, Romania
tel:(40) 30.214167/181, fax: (40) 30.520277

Resume. Le present ouvrage est consacre a l'etude et a la mise en oeuvre de nouvelles structures de moteurs piezo-electriques. Apres quelques considerations generales, sur la conversion d'energie par effet piezo-electrique et sur le principales structures de piezomoteurs, sont presentees les contributions des auteurs en realisations des nouveau moteurs piezo-electriques. On presente egalement les essayes experimentaux et les observations les conclusions finales.

Mots-clef: vibromotors, piezomoteurs, moteurs piezo-electriques.

   Back to top

Leon MANDICI

   Back to top

Leon MANDICI

   Back to top

  NEW  DC MOTOR SPICE MODEL
 

Ioan COJOCARIU
"Stefan cel Mare" University of Suceava
str. Universitatii nr.1, RO-5800- Suceava
E-mail: cojocaru@eed.usv.ro
 

Abstract. The paper presents a new DC Motor model achieved using Intusoft IsSPICE package. We construct this model because the IsSPICE model and SERVO model not respond in the same time to the all requirements in the electrical drive systems. In the first part we shown a simple DC Motor model where the magnetic field is constant. The second DC Motor model comprise the magnetic field simulation. The specific feature of these models is given by the fact that we can change all motor parameters in order to define the right DC Motor model behaviour.

   Back to top

Alexandru MIRON
RENEL FDTEE Suceava
str. Stefan cel Mare, nr. 24

Narcisa AIROAIEI
"Stefan cel Mare" University of Suceava
str. Universitatii nr.1, 5800 Suceava

Abstract.This paper presents some considerations as regards the medium voltage network with combined treatment neutral (arc suppression coil permanently connected at the internal services transformer ground or at neutral point coil and resistor connected in parallel with the help of a single breaker) and identification methods of the earth faults in this network.

   Back to top

ing. Eugen COCA
S.C. ELECTRICA S.A. - SD Suceava, 24, Stefan cel Mare, 5800 - Suceava, Romania
tel: +40-30-221698/3112, fax: +40-30-213974
E-mail: ecoca@suceava.iiruc.ro / ecoca@lycosmail.com

Prof. dr. ing. Dimitrie ALEXA
Technical University "Gh. Asachi" Iasi, 11, Bd. Copou, 6600 - Iasi, Romania
tel: +40-32-142283, fax: +40-32-211667
E-mail: alexa@etc.tuiasi.ro
 

Abstract: Power line filters are now present in almost all domestic and industrial applications. One major reason for installing a  filter directly at the power entry point is the suppression of the conducted emissions that would otherwise be injected directly onto the power lines. Another reason is to suppress noise entering the equipment from the power lines. The continuous development of uninterruptible power supplies implies more efficient and inexpensive line filters. This article presents a detailed description and evaluation of these "ordinary" filters.

Keywords: noise, conducted emissions, power line filter, absorption filter

  Back to top

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

 Back to top