XLV INTERNATIONAL SCIENTIFIC CONFERENCE ON

INFORMATION, COMMUNICATION

AND ENERGY SYSTEMS AND TECHNOLOGIES

www.icestconf.org

ICEST2010

23 - 26 June, Ohrid, Macedonia

Proceedings of Papers

VOLUME 2

Bitola, 2010

TABLE OF CONTENTS

VOLUME 2

POSTER SESSION II - Telecommunications Systems and TechnologyPO II.1 Hybrid ARQ Schemes Using Diagonally Interleaved Turbo Product Codes 493

Nikolay Kostov, Slava Yordanova and Ginka Marinova

PO 11.2 Comparison Studies on Path Recovery Schemes in MPLS Network 497

Veneta Aleksieva

PO 11.3 An Application for Geospatial Visualization of Optical Networks 501

Boban Joksimoski, Tomislav Lazarevski, Dejan Konevski, llija Jolevski and Dragan

MihajlovPO 11.4 Analysis of the Physical Layer in IEEE 802.16fe) Standard 505

Grigor Mihaylov, Teodor Iliev and Georgi Hristov

PO 11.5 Analysis of Reed-Solomon Codes: Application to Digital Video Broadcasting Systems ... 509

Teodor Iliev and Georgi Hristov

PO 11.6 Comparative Study on Asymmetric Key Cryptography Algorithms for HeterogeneousNetwork

,.513

Maria Nenova, Georgi Iliev and Kiril KassevPO 11.7 Forecasting the Number of IPTV Subscribers in Serbia 517

Valentina Radojicic, Goran Markovic and Marijana Vukasinovic

PO 11.8 Express Mail Service Quality Improvement Using TETRA Communication System 521

Momcilo Dobrodolac, Dejan Markovic, Bojan Stanivukovic and Mladenka Blagojevic

PO 11.9 Sequential Symbol Synchronizers based on Pulse Comparation by Positive

Transitions at a Quater Rate 525

Antonio Reis, Jose Rocha, Atilio Gameiro and Jose Carvalho

PO 11.10 Prefilter Bandwidth Effects in Sequential Symbol Synchronizers based on Pulse

Comparation by Positive Transitions at a Quater Rate 529Antonio Reis, Jose Rocha, Atilio Gameiro and Jose Carvalho

PO 11.11 Throughput Improvement in Gigabit DSL Communications 533

Vladimir Poulkov, Miglen Ovcharov and Pavlina Koleva

PO 11.12 Performance Analysis of SC Diversity System with Different Correlation Models in a

-H fading Environment 537

Jelena Anastasov, Mihajlo Stefanovic, Stefan Panic, Ivana Petrovic and Edis Mekic

PO 11.13 Application of MPPT controller for hybrid alternative electrical power grid

independent source 541Vladimir Smiljakovic and Zoran Zivanovic

PO 11.14 Wideband Receiver for Signal Detection in Frequency Range from 15 to 19GHz 545

Sinisa PJovanovic, Predrag S.Manojlovic, Dragan D.Obradovic and NemanjaM.Mitrovic

PO 11.15 Casse Grain Antenna of 0.9m at 10.5GHZ 549

Zoran Micic, Vladimir Smiljakovic and Ivan Jovanovic

POSTER SESSION III - Radio Communications, Microwave Technique

and Antennas

PO lll.l Comparative Study of Circularly Polarized Microstrip Arrays Distinguished by their

Feeding System 555

Georgi Kirov and Desislava Mihaylova

485

PO 111.2 Smart Antennas with Patch Elements. Modeling with Matlab 559

Vyara Vasileva

PO 111.3 Design of a Compact Hexagonal Monopole Antenna for Ultra-Wideband 563

A. A. Shaalan and M. 1. Ramadan

PO 111.4 Design of an Anechoic Chamber at the Faculty of Electronic Engineering in Nis 567

Zoran Stankovic, Bratislav Milovanovic, Nebojsa Doncov, Marija Agatonovic

POSTER SESSION IV - Signal Processing

PO IV.l Extracting Cuts From Video Streams in Real Time 575

Jugoslav Jokovic, Danilo Oordevic

PO IV.2 Shape Similarity for Biomedical Analyses 579

Mariana Tsv. Stoeva

PO IV.3 Digital FIR Filter with Improved Selectivity 583

Peter ApostolovPO IV.4 Identification and Clusterization of Images with Neuron Networks 587

Vladimir Yanakiev and Milena Lazarova

PO IV.5 Algorithm for Image Recognition on FPGA 591

Rosen Spirov

PO IV.6 Revisiting the Fractional-Order Hold Device 595

Milica Naumovic

POSTER SESSION V - Robotics

PO V.l Transfer Line for Manufacturing of Armatures for Electric Hand-Held Tools 601

Tchakarsky D., T. Vakarelska P. Tomov, R. Dimitrova, I. YanakievPO V.2 Object-Oriented Engineering Test-Stand for a Double- Sided Co-Axial Processing of

Openings in Products of a "Column" Type 607

Vakarelska T., D. Tchakarsky, P Tomov, R. Dimitrova, I. Yanakiev

PO V.3 Gesture-based Human-Robot Interaction and Control 611

Saso Koceski, Natasa Koceska and Predrag KoceskiPO V.4 Exploration of Algorithms to Control a Maze Robot 615

N. Nikolov, S. Ivanov, S. Mustafa, M. TodorovaPO V.5 Path Control with Input Saturation for Reversing a Car-Like Mobile Robot 619

Plamen Petrov and Lubomir Dimitrov

POSTER SESSION VI - Power Transmission and Distribution SystemsPO VI.1 Simulation Models of the Automatic Transfer Switch in the Electrical Power

Distribution Network 625

Medina Mehmed-Hamza

PO VI.2 Assessment of the Safety Conditions from High Touch and Step Voltages in the

Grounding Systems of Distribution Network 629Nikolce Acevski, Kire Mijoski, Tomce Mijoski

PO VI.3 Potential Characteristics of Single and Group Earthing Devices 633Marinela Yordanova, Borislav Hr. Dimitrov

PO VI.4 Analysis of the Residual Current Devices operation in IT and TT systems 635Marinela Yordanova, Mediha Mehmed-Hamza

PO VI.5 Overvoltage Protection of a Cable Part in an Electrical Grid 20 Kv 639

Margreta P. Vasileva

486

POSTER SESSION VII - Computer Systems and Internet Technologies I

PO VII.1 Specific Characteristics of Computer Criminal Offenses With Regard to the Law

Regulations 643

Jelena Matijasevic and Zaklina Spalevic

PO VII.2 A Modular System for Solving Optimization Problems by Testing Them with Genetic

Algorithms 647

Hristo Toshev, Stefan Koynov and Chavdar Korsemov

POVII.3 Ontology-Based Deep Web Search For E-Science 651

Tatyana Ivanova

PO VII.4 RDB to RDF or Ontology Mapping - Approaches, Tools and Problems 655

Tatyana Ivanova

PO VII.5 Software Cost Estimation - a Practical Approach 659

Violeta Bozhikova

PO VII.6 Web-based Interactive System for Multicriteria Decision Analysis 663

Mariana Vassileva, Krassimira Genova and Boris Staykov

PO VII.7 Constructing Data Cube as an Object Oriented Class 667

Antoaneta Ivanova

POVII.8 Virtual System for Generating Analog and Digital Signals 671

Tsvetozar Georgiev and Georgi Krastev

PO VII.9 Asynchronous Micro-Pipeline With Multi-Stage Sections 675

Dimita'r.Tyanev, Stefka Popova

POSTER SESSION VIII - Computer Systems and Internet Technologies II

PO VIII.1 Collaborative Environment Aimed to Promote Knowledge Creation 681

Tania Vasileva and Vassiliy Tchoumatchenko

PO VIII.2 Programming Environment for Management of Parallel Jobs with Concurrent Access

to a Common Data Source 685

Ivaylo Penev

PO VIII.3 Creating Applications With PHP & AJAX 689

Ljupcho Apostolov

PO VIII.4 Performance Assessment of Metrics for Video Quality Estimation 693

Zoran Kotevski and Pece Mitrevski

POVIII.5 PageRank Algorithm Overview 697

llija Jolevski, Gjorgi Mikarovski and Aleksandar Kotevski

PO VIII.6 Impact of the Number of Chromosomes on the Fitness Value Improvement in

Standard GA Applications 701

Ivana Stojanovska, Agni Dika and Blerta Prevalla

PO VIII.7 Performance Analysis of Sorting Algorithms Through Time Complexity 705

Blerta Prevalla, Ivana Stojanovska and Agni Dika

PO VIII.8 DBpedia as Entry Point in the Web of Data (Semantic Web) 709

Mile Gjorgjioski, Dijana Capeska-Bogatinoska and Mirjana Trompeska

POSTER SESSION IX - Computer Systems and Internet Technologies III

PO IX.l System Architecture for Capital Budgeting in Non-Financial Institution 715

Galina Naydenova

PO IX.2 Graph-Based Analytical Approach to Testing Programs 719

Mitko Mitev and Pavlina Vladimirova

PO IX.3 A Study of Information Technology Use Among Students at South East European

University 723

Marika Trpkovska

487

PO IX.4 Virtual Infrastructures in Education 727

Hristo Valchanov, Nadezhda Ruskova and Trifon Ruskov

PO IX.5 An Approach to Factorization and Attack Against the Asymmetric Cryptographic

Algorithm RSA 731

Petar Antonov and Valentina Antonova

PO IX.6 Secure Authentication Protocol for Distant Access 735

Petar Antonov and Valentina Antonova

PO IX.7 Java-Based Systems for Analysis and Estimation, with Application in Diagnostics of

Complex Objects 737

Hristo Nenov

PO IX.8 Innovation in Systems for Analyze and Estimation 739

Hristo Nenov and Geo Kunev

PO IX.9 Fuzzy Based Approach for Decision Support System 743

Pavlina Vladimirova and Daniela llieva

PO IX.10 Information Technology Influence on Bank For Business 747

Ramaj Vehbi, Hasani Vjollca and Shabani Enver

POSTER SESSION X - Computer Graphics

PO X.l Video Surveillance using Augmented Virtual Environments 753

Aleksandar Milosavljevic, Aleksandar Dimitrijevic and Dejan Rancic

PO X.2 Application of Listed Data Structures in Knitting Industry CAD/CAM Systems

Development , 757

Elena Zaharieva-StoyanovaPO X.3. A Fast Template Matching Algorithm 761

Yulka Petkova, Nuri Nuri and Milena^Karova

PO X.4 Cost Effective 3D Architectural Visualisation 765

Igor Nedelkovski and Vladimir GjorgjieskiPO X.5 Creating Panoramas and Eliminating Ghosting 769

Svetlana Vrskova and Igor Nedelkovski

PO X.6 Optimization of Laser Marking Process with the Help of Stimulation Models 773

Lyubomir Lazov, Nikolaj AngelovPOX.7 3D Graphic Images of Laser Induction Temperature Fields 777

Lyubomir Lazov and Nikolaj AngelovPO X.8 A Low Cost Method for 3-D Documentation of Cultural Heritage Objects 781

Jove Pargovski

POSTER SESSION XI - Electronic Components, Systems and

TechnologiesPO Xl.l Realization of Direct Digital Synthesis Generators Based on FPGA and PSoC

Integrated Circuits 787

EltimirStoimenov, Georgi Mihov and Ivailo Pandiev

PO XI.2 Modeling and Simulation of Hall Elements 791

A.T.AIeksandrov, P.D. Petrova, N. D. DraganovPO XI.3 Optoelectronic Devices Characterization Using Low Cost Data Acquisition System 795

Georgi Nikolov and Todor DjamiykovPO XI.4 Experimental Galvanomagnetic Transdusers of Linear Offset - Part 1 799

Nikola Draganov and Anatolii Aleksandrov

PO XI.5 Experimental Galvanomagnetic Transducers of Linear and Angular Offset - Part II 803

Anatolii Aleksandrov and Nikola DraganovPOXI.6 Modeling FPGA Logic Architecture 807

Petar Minev and Valentina Kukenska

488

PO XI.7 Behavioural VHDL-AMS Model for the Current- Feedback Operational Amplifier 811

Ivailo Pandiev

PO XI.8 Voltage-mode Lowpass, Bandpass, and Bandstop Programmable Filter using Four-

terminal CFOAs 815

Ivailo Pandiev

PO XI.9 Recombination Process in Bilayer Polymer Electroluminescent Structures 819

Mariya Aleksandrova, Milka Rassovska, Georgy Dobrikov

PO XI.10 Modeling of a Discharge Pulse in a Circuit With Two Discharge Gaps 823

Stefan Bamdovand Milena Dicheva

POXI.ll Image Quality of Planar InP Detector 827

Maja Dekic and Hasna Samic

PO XI.12 Investigations of Power Losses in Off-Chip and On-Chip Inductors 831

Tihomir Brusev and Boyanka Nikolova

PO XI.13 Behavioural VHDL-AMS Model for Monolithic Programmable Gain Amplifiers 835

Dimo Martev, Ivan Panayotov and Ivailo Pandiev

POSTER SESSION XII - Industrial Electronics

PO XII.1 Adjustment and Diagnostics of the System for Gas in Motor Vehicles 841

Milan Milovanovic and Sasa Jovanovic

PO XII.2 Analysis of LCC Resonant DC-DC Converter with Capacity Filter in the Load Circuit 845

Aleksandar Vuchev, Nikolay Bankov and Georgi TerziyskiPO XII.3 Load Characteristics of LCC Resonant DC-DC Converter with Capacity Filter in the

Load Circuit 849

Aleksandar Vuchev, Nikolay Bankov and Georgi Terziyski

PO XII.4 Investigation of Power MOSFET and IGBT Gate Drivers using SPICE 853

Georgi Kunov and Elissaveta Gadjeva

POXII.5 CCTV Industry 857

Elena Koleva and Ivan Kolev

PO XII.6 PSPICE Simulations of Pulse Distributor in Industry 861

Elena Koleva andTsanko Karadzhov

PO XII.7 Generator of Synchronizing Digital Signals with Microcontroller PIC18F252 865

Tsanko Karadzhov and Ivelina Balabanova

PO XII.8 Improved Grid Connected Power Supply for Drivers in Power Electronic Converters 869

Vencislav Valchev, Dimitar Bozalakov and Angel Marinov

POSTER SESSION XIII - Renewable Energies

PO XIII.1 Preferential Tariffs and Administrative Procedures for Obtaining Licenses for Use of

Electric Power From Photovoltaics 875

Miroslav Labudovic, Vladimir Labudovic and Hristina Spasevska

PO XIII.2 Renewable Energy Technologies and Challenges for Their Applications 879

Aleksandar Malecic

PO XIII.3 Influence of the Monthly Solar Radiation Variations to the Performances of the

Hybrid Photovoltaic-Diesel Systems 883

Dimitar Dimitrov, Atanas lliev

PO XIII.4 Optimal Distribution of PV Modules According to Dynamic Optimization Methods 887

Borislav Dimitrov, HristoforTahrilov

PO XIII.5 Autonomous PV Heating System with Foil Heaters 891

Borislav Dimitrov, HristoforTahrilov

PO XIII.6 Silicon Sensors for Systems for Assessment of Sun Potential 895

Irina Pavlova, Ilia Hadzhidimov, Emilian Bekov

489

PO XIII.7 Increasing the Role of RES and Correct Assessment the Solar Potential of Bulgaria 899

Zheko Kiryakov and lliya Hadzhidimov

PO XIII.8 Investigation of an Autonomous Hybrid System for Direct Supply of an Induction

Heating Device 903

Vencislav Valchev, Hristofor Tahrilov, Borislav Dimitrov

PO XIII.9 Mathematical Model for Water Use and Transfer Between Hydro Power Plants 907

Mile Spirovski and Arsen Arsenov

POSTER SESSION XIV - Education Quality

PO XIV.l Electronic Identification of Completing the Evaluations of Students in a Database 913

Rosen Radonov, Konstantin Zaimov and Valentin Videkov

PO X1V.2 Laws for E- Learning and Copyrights 917

Elena Racheva, Slava Yordanova and Mitko Mitev

PO XIV.3 Development in Education of Electrical Measurements and Circuits Theory 919

Rosen Vasilev, Ivaylo Nedelchev, Vyara Vasileva and Miroslava Doneva

PO XIV.4 Examples for Virtual Laboratory Exercises by Electrical Measurements Based on Nl

ELVIS II 923

Rosen Vasilev and Ivaylo Nedelchev

PO X1V.5 Framework for Mapping Learner and Gamer 927

Milen Petrov and Adelina Aleksieva-Petrova

PO XIV.6 Using Student Feedback in Measuring the Quality of Teaching in Higher Education 931

Danijel Mijic

PO XIV.7 Program Library for Development and Research of Distance Learning Courses 935

Mitko Mitev and Dimitar Georgiev

PO XIV.8 The MPLS Network Simulators in the Computer Network Education 939

Veneta Aleksieva

PO XIV.9 E-content for Computer-Aided Design of Communication Circuits with PSpiceSimulator 943

Galia Marinova

PO XIV.10 On-line system fdr Testing and Certification 947

Milena Karova, Julka Petkova and Emil Kerekovski

PO XIV.ll Some Important factors for Designing Semi- Autonomous Learning Environments 951

Boyka Geadinarova

490