15. PCI 2011: Kastoria, Greece
Pantelis Angelidis, Angelos Michalas (Eds.): 15th Panhellenic Conference on Informatics, PCI 2011, Kastoria, Greece, September 30 - Oct. 2, 2011. IEEE 2011 ISBN 978-1-61284-962-1
Information Systems
Constantinos T. Delistavrou, Konstantinos G. Margaritis: Towards an Integrated Teaching Environment for Parallel Programming. 3-7
Ioannis Stamelos, Dimitrios Settas, Despoina Mallini: Teaching Software Project Management through Management Antipatterns. 8-12
Stergios Tegos, Stavros N. Demetriadis, Anastasios Karakostas: MentorChat: Introducing a Configurable Conversational Agent as a Tool for Adaptive Online Collaboration Support. 13-17
Theodoros Iliou, Georgios Paschalidis: Using an Automated Speech Emotion Recognition Technique to Explore the Impact of Bullying on Pupils Social Life. 18-22
O. Papadopoulou: Evaluation of Four, Free and Open Source DICOM Software Tools. 23-27
Anastasios Tsolakidis, Cleo Sgouropoulou, Ioannis Xydas, Olivier Terraz, Georgios Miaoulis: Academic Research Policy-Making and Evaluation Using Graph Visualisation. 28-32
Nicholaos Petalidis, Gregory Gregoriadis, Alexandros Theodoridis, Antonios Chronakis: ProMaSI - A Project Management Simulator. 33-37
Databases and Data Mining
Nikolaos Kouiroukidis, Georgios Evangelidis: The Effects of Dimensionality Curse in High Dimensional kNN Search. 41-45
Evangelos Outsios, Georgios Evangelidis: Data Node Splitting Policies for Improved Range Query Efficiency in k-dimensional Point Data Indexes. 46-50
George Roumelis, Michael Vassilakopoulos, Antonio Corral: Nearest Neighbor Algorithms Using xBR-Trees. 51-55
Georgia S. Latsiou, Apostolos N. Papadopoulos: Incremental Discovery of Top-k Correlative Subgraphs. 56-60
Education Technologies
Katerina Georgouli: Virtual Learning Environments - An Overview. 63-67
Alexandros Papanikolaou, Vassilios Karakoidas, Vasileios Vlachos, Andreas Venieris, Christos Ilioudis, Georgios Zouganelis: A Hacker's Perspective on Educating Future Security Experts. 68-72
Apostolos Mavridis, Thrasyvoulos Tsiatsos, Stergios Tegos: Exploiting Web Conferencing to Support Collaborative Learning. 78-82
Algorithms and Data Structures
Charalampos S. Kouzinopoulos, Konstantinos G. Margaritis: A Performance Evaluation of the Preprocessing Phase of Multiple Keyword Matching Algorithms. 85-89
Dimitris Antoniou, Ioannis Kampouris, Evangelos Theodoridis, Athanasios K. Tsakalidis: Splaying for Compression: An Experimental Study. 90-94
Michalis Vafopoulos: A Framework for Linked Data Business Models. 95-99
Konstantinos Patakakis, Loukas Georgiadis, Vasileios A. Tatsis: Dynamic Dominators in Practice. 100-104
Networking
Dimitrios Sisiaridis, B. Nick Rossiter: Applying Categorical Logic on a Holistic Security Architecture across Distributed Systems. 107-111
I. P. Mavridis, A.-I. E. Androulakis, A. B. Halkias, Ph. Mylonas: Real-Life Paradigms of Wireless Network Security Attacks. 112-116
George Kadas, Periklis Chatzimisios: Collaborative Efforts for Safety and Security in Vehicular Communication Networks. 117-121
Stefanos Harhalakis, Nikolaos Samaras, Vasileios Vitsas: An Experimental Study of the Efficiency of Explicit Congestion Notification. 122-126
Marie-Aurelie Nef, Sophia Karagiorgou, George I. Stamoulis, Panayotis Kikiras: Supporting Service Differentiation in Wireless Sensor Networks. 127-133
Michail Tolkas, Michail Bletsas, Pantelis Angelidis: Handling Multicast Video over Non Multicast Networks. 134-138
Panagiotis G. Sarigiannidis, Malamati D. Louta, Angelos Michalas: On Effectively Determining the Downlink-to-Uplink Sub-frame Width Ratio for Mobile WiMAX Networks Using Spline Extrapolation. 139-143
Pavlos Paraskevopoulos, Anastasios Gounaris: Optimal Tradeoff between Energy Consumption and Response Time in Large-Scale MapReduce Clusters. 144-148
Spiridoula V. Margariti, Vassilios V. Dimakopoulos: A Novel Probabilistic Flooding Strategy for Unstructured Peer-to-Peer Networks. 149-153
Nikolaos A. Pantazis, Stefanos A. Nikolidakis, Dionisis Kandris, Dimitrios D. Vergados: An Automated System for Integrated Service Management in Emergency Situations. 154-157
Open Source Software
Apostolos Kritikos, Fragkiskos Chatziasimidis: SFparser: A Tool for Selectively Parsing SourceForge. 161-165
Eleni Constantinou, George Kakarontzas, Ioannis Stamelos: Towards Open Source Software System Architecture Recovery Using Design Metrics. 166-170
Skordas Ioannis, George F. Fragulis, Athanassios G. Triantafyllou: e-AirQuality: A Dynamic Web Based Application for Evaluating the Air Quality Index for the City of Kozani, Hellas. 171-174
Sotirios Kontogiannis, Alexandros Karakos, G. Kokkonis, P. Kitsos: Snmp for Ethernet Networks SETH: A Network Benchmark Toolkit for Managing Routers Statistical Information. 175-179
Multimedia Services
Dimitrios Amanatidis, Michael Dossis: Use of Behavioral Synthesis to Implement a Cellular Neural Network for Image Processing Applications. 183-187

Emmanouil Skondras, Malamati D. Louta, Panagiotis G. Sarigiannidis: A Personalized Audio Web Service Using MPEG-7 and MPEG-21 Standards. 199-204
e-Services: Empirical Studies
Evanthia Faliagka, Athanasios K. Tsakalidis, Danae Vaikousi: Teenagers' Use of Social Network Websites and Privacy Concerns: A Survey. 207-211
Artemios G. Voyiatzis, Christos Fidas, Dimitrios N. Serpanos, Nikolaos M. Avouris: An Empirical Study on the Web Password Strength in Greece. 212-216
Georgios Lappas: Social Multimedia Mining: A Social Informatics Perspective. 217-221
Constantine J. Aivalis, Anthony C. Boucouvalas: Log File Analysis of E-commerce Systems in Rich Internet Web 2.0 Applications. 222-226
Information Retrieval
Nikitas N. Karanikolas: Search Culture. 229-234
Ioannis Charalampopoulos, Ioannis Anagnostopoulos: A Comparable Study Employing WEKA Clustering/Classification Algorithms for Web Page Classification. 235-239
Agis Papantoniou, Vassilis Loumos, Miltos Poulizos, Gregory Rigas: A Framework for Visualizing the Web of Data: Combining DBpedia and Open APIs. 240-244
Numerical and Scientific Computations
C. K. Filelis-Papadopoulos, George A. Gravvanis, Elias A. Lipitakis: Higher Order Finite Difference Preconditioned Scheme: A Multithreaded Approach. 253-258
P. I. Matskanidis, George A. Gravvanis, Konstantinos M. Giannoutakis: A Note on Parallel Finite Element Approximate Inverses Using OpenMP on Multicore Systems. 259-264
Spiros N. Agathos, Panagiotis E. Hadjidoukas, Vassilios V. Dimakopoulos: Design and Implementation of OpenMP Tasks in the OMPi Compiler. 265-269
George Kakarontzas, Vassilis C. Gerogiannis, Ioannis Stamelos, Panagiotis Katsaros: Elastic Component Characterization with Respect to Quality Properties: An Intuitionistic Fuzzy-Based Approach. 270-274
Human-Computer Interaction
Orestis Akribopoulos, Vasileios Georgitzikis, Anastasia Protopapa, Ioannis Chatzigiannakis: Building a Platform-Agnostic Wireless Network of Interconnected Smart Objects. 277-281
Efi Papatheocharous, Panagiotis Gouvas: eTracer: An Innovative Near-Real Time Track-and-Trace Platform. 282-286
Dimitrios Kravvaris, Eleni Thanou, Konstantinos Chorianopoulos: Evaluation of Tip-Activated and Push-Button Infrared Pens for Interactive Whiteboards. 287-291
Michael N. Kalochristianakis, Kostas Grammatikakis, Manolis Saldaris, Irene Mastorakis, Grigoris Tzanodaskalakis: The Concept and Design of an Open, Integrated Print Charging System. 292-296
eCommerce, eBusiness, eGovernment, eHealth
Michalis Vafopoulos, Thomas Theodoridis, Dimitris Kontokostas: Inter-viewing the Amazon Web Salespersons: Trends, Complementarities and Competition. 299-303
Andreas Papadakis, Konstantinos Rantos, Antonis Stasis: Promoting e-Gov Services: e-Document Interoperability across EU. 304-308
Dionisis Georgopoulos: The Military Model in I.T. and Computer Studies: A Violation against Women's Rights in Work and Education. 309-314
Spyros Arvanitis, Euripidis Loukis, Vasiliki Diamantopoulou: Information Systems and Innovation in Greek Firms - An Empirical Investigation. 315-320
Athanasios Keskempes, Anthony Roussos, Nikos Tselikas, Anthony C. Boucouvalas: Seismicity Online Grid Map for Regional Earthquake Activity Studies. 321-329
Special Session: Mobile Device Software Development

Alexandros Soumplis, Eleni Chatzidaki, Eleni Koulocheri, Michalis Nik Xenos: Implementing an Open Personal Learning Environment. 345-349
Special Session: Quality in Educational Technologies
Kiriakos Patriarcheas, Spyridon Papaloukas, Michalis Nik Xenos: Analyzing the Fora: An Algorithms Combination for the Representation of Messages. 353-357
Stavros Valsamidis, Sotirios Kontogiannis, Alexandros Karakos, Ioannis Kazanidis: A Combined Algorithm for LMS Usage Assessment. 358-362
Theodosios Sapounidis, Stavros N. Demetriadis: Touch Your Program with Hands: Qualities in Tangible Programming Tools for Novice. 363-367
Nikolaos K. Tselios, Panagiota Altanopoulou, Christos Katsanos: Effectiveness of a Framed Wiki-Based Learning Activity in the Context of HCI Education. 368-372
Manolis Chalaris, Anastasios Tsolakidis, Cleo Sgouropoulou, Ioannis Chalaris: Developing an Information System for Quality Assurance in Higher Education Using the Balanced Scorecard Technique - The Case Study of TEI-A. 373-377
Special Session: Real World Internet
Christos E. Alexakos, Manos J. Georgoudakis, Athanasios P. Kalogeras, F. Andritsos, Panagiotis Konstantinopoulos, Ioannis Chatzigiannakis: Unattended Surveillance Network for After-Disaster Support in Public Transportations Sector. 381-385
Marie-Aurelie Nef, Ioannis Filippopoulos, Eleftherios Voumvourakis, Aggelos Aggelis, Leonidas Perlepes, Georgios I. Stamoulis, Panayotis Kikiras: i-Protect: An Open Source Emergency Management Framework. 386-391
Pantelis Vikatos, Evangelos Theodoridis, Georgios Mylonas, Athanasios K. Tsakalidis: PatrasSense: Participatory Monitoring of Environmental Conditions in Urban Areas Using Sensor Networks and Smartphones. 392-396
A. Tagarakis, V. Liakos, L. Perlepes, S. Fountas, T. Gemtos: Wireless Sensor Network for Precision Agriculture. 397-402



