| Vol-1036 urn:nbn:de:0074-1036-1 Copyright © 2013 for the individual papers by the papers' authors. Copying permitted only for private and academic purposes. This volume is published and copyrighted by its editors.

# BCI-LOCAL 2013
Local Papers of the Balkan Conference in Informatics

### Local Proceedings of the Sixth Balkan Conference in Informatics

### Thessaloniki, Greece, September 19-21, 2013.

Edited by

### Christos K. Georgiadis *
Petros Kefalas **
Demosthenes Stamatis ***

* University of Macedonia, Department of Applied Informatics, Greece
** The University of Sheffield International Faculty, City College, Greece
*** ATEI of Thessaloniki, Department of Information Technology, Greece

## Table of Contents

- Preface

### Session 1: Algorithms and Theoretical Foundations

- Representing a Relational Database as a Directed Graph and Some Applications 1
  Radoslav Radev
- Decomposition of verification of machine programs based on control-state Abstract State Machines 9
  Werner Gabrisch

### Session 2: Artificial Intelligence

- Profiling Social Network Users With Machine Learning 14
  Evis Trandafili, Marenglen Biba, Aleksander Xhuvani

### Session 3: Computer Graphics, GUI, Visualization &GIS

- Native browser support for 3D rendering and physics using WebGL, HTML5 and Javascript 21
  Rovshen Nazarov, John Galletly
- Development of a Finite Element Method Mode Solver Application for Optical Waveguides 25
  Anastasios Kichidis, Nikolaos Pleros, Amalia Miliou
- Visualizing the research profile of an IT Department 32
  Simos Lazaridis, Manolis Vozalis
- Investigating the Performance of Motion Estimation Block-Matching Algorithms on GPU Cards 39
  Eralda Nishani, Betim Cico, Neki Frasheri Frasheri

### Session 4: Computer Networks and Operating Systems

- Optical Wdm Networks and Multicasting 47
  Pinar Kirci, A.Halim Zaim
- Improving RAID-5 performance by reducing data redistribution time 52
  Genti Daci, Mirela Ndreu
- Separating network control from routers with Software Defined Networking 59
  Shpetim Latifi, Arjan Durresi, Betim Cico

### Session 5: Computer Security

- Graphical User Authentication in Mobile Device using the web RGB color palette 65
  Ilias Krikelas, Ioannis Xydas, Pierre-Francois Bonnefoi

### Session 6: Informatics Applications

- Implementing the CROP Reference Architecture: The CROP Learning Object Editor 72
  Maria Tsiakmaki, Chrysafis Hartonas

- An Overview of Smart Home Environments: Architectures, Technologies and Applications 78
  Costin Badica, Marius Brezovan, Amelia Badica

- Using CQRS Pattern for Improving Performances in Medical Information Systems 86
  Petar Rajkovic, Dragan Jankovic, Aleksandar Milenkovic

- Design and Development of Educational Platform in Augmented Reality Environment using Gamification to enhance Traditional, Electronic and Lifelong Learning Experience. 92
  Athanasia Eleftheria Chantzi, Charikleia Plessa, Iason Chatziparadeisis Gkanas, Dimitrios Tsolis, Athanasios Tsakalidis

### Session 7: Informatics Education and e-Learning

- Blended Learning in Tertiary Education: A Case Study 96
  Veljko Aleksic, Mirjana Ivanovic

- Towards the Creation of a New Program in Informatics 104
  John Galletly, Volin Karagiozov, Dimitar Christozov, Stoyan Bonev

- Student achievement in paper, computer/web and mobile based assessment 107
  Stavros Nikou, Anastasios Economides

- Constructing µLearning Content 115
  Pavel Boytchev

### Session 8: Software Engineering

- BuCo Reporter: Mining Software and Bug Repositories 121
  Elvis Ligu, Theodore Chaikalis, Alexander Chatzigeorgiou

- Know Thy Source Code. Is it mostly dead or alive? 128
  Vladimir Markovets, Robert Dabrowski, Grzegorz Timoszuk, Krzysztof Stencel

### Session 9: Web Systems/Applications

- Semantic Web Tools for Categorization Greek Texts on the Internet: the MeDa13 standard and TeGO ontology 132
  Chrystalla Neofytou

- Enriching scientific publications with semantically related data 140
  Arben Hajra, Klaus Tochtermann, Vladimir Radevski

- The Increase of the Web Application Reliability to the End Users 145
  Isak Shabani, Betim Cico, Dhuratë Hyseni, Fatos Halilaj

- An Approach to Evaluate the Reliability of Web Applications in Cloud Computing Using Dynamic Fault Trees 150
  Elinda Kajo Mece, Eneida Driza

- B2B or Not B2B? The future of B2B and the role of Small and Medium-sized Enterprises from SEE 158
  Adrian Besimi, Zamir Dika

- Desktop Gateway: Semantic Desktop Integration with Cloud Services 162
  Aleksandar Kareski, Milos Jovanovik, Dimitar Trajanov

2013-09-13: Submitted by Christos K. Georgiadis
2013-09-13: published on CEUR-WS.org