Advances in Informatics : 10th Panhellenic Conference on Informatics, PCI 2005, Volas, Greece, November 11-13, 2005, Proceedings

This volume contains a subset of the papers presented at the 10th Panhellenic Conference in Informatics (PCI 2005), which took place at the City of Volos, Greece, during November 11–13, 2005. After an international call for papers, 252 full papers were submitted. The number of the submitted papers constitutes a record number for the conf- ence and reveals its growing dynamics. The authors represented universities and institutes from the following countries: Algeria, Bulgaria, China, Cyprus, Czech Republic, Finland, Greece, The Netherlands, Hungary, Italy, Japan, Korea, The Kingdom of Saudi Arabia, Lebanon, Lithuania, Malaysia, Poland, Romania, Spain, Taiwan, Turkey, Ukraine, UK, and USA. Of the submitted papers, 81 were accepted for inclusion in this volume, giving an acceptance ratio of appr- imately 32. 2%. The papers are classi?ed into 17 thematic sections as follows: – data bases and data mining – algorithms and theoretical foundations – cultural and museum information systems – Internet-scale software/information systems – wearable and mobile computing – computer graphics, virtual reality and visualization – AI, machine learning and knowledge bases – languages, text and speech processing – bioinformatics – software engineering – educational technologies – e-business – computer and sensor hardware and architecture – computer security – image and video processing – signal processing and telecommunications – computer and sensor networks We would like to thank all the ProgramCommittee members and the additional reviewers for devoting time, e?ort and expertise so bounteously.

Data Bases and Data Mining.- Closest Pair Queries with Spatial Constraints.- Database Support for Data Mining Patterns.- Visual Techniques for the Interpretation of Data Mining Outcomes.- Towards In-Situ Data Storage in Sensor Databases.- Algorithms and Theoretical Foundations.- A Primal-Dual Algorithm for Online Non-uniform Facility Location.- Routing and Wavelength Assignment in Generalized WDM Tree Networks of Bounded Degree.- Maximum-Size Subgraphs of P4-Sparse Graphs Admitting a Perfect Matching.- Boundary Labelling of Optimal Total Leader Length.- Successive Linear Programs for Computing All Integral Points in a Minkowski Sum.- The Contribution of Game Theory to Complex Systems.- Estimated Path Selection for the Delay Constrained Least Cost Path.- Finding Feasible Pathways in Metabolic Networks.- One-Dimensional Finger Searching in RAM Model Revisited.- How to Place Efficiently Guards and Paintings in an Art Gallery.- Cultural and Museum Information Systems.- Virtual Reality Systems and Applications: The Ancient Olympic Games.- Auction Scenarios of Cultural Products over the WWW.- Exploring Cultural Information Interaction Design: A Case Study of a Multimedia Exhibition Based on Customizable User Interfaces.- Using Personal Digital Assistants (PDAs) to Enhance the Museum Visit Experience.- Trial Evaluation of Wireless Info-communication and Indoor Location-Based Services in Exhibition Shows.- Internet-Scale Software/Information Systems.- Epidemic Collaborative Geocast for Reliable Segmented File Sharing in Mobile Peer-to-Peer Devices.- Investigating Factors Influencing the Response Time in ASP.NET Web Applications.- Storing and Locating Mutable Data in Structured Peer-to-Peer Overlay Networks.- Performance Analysis of Overheads for Matrix – Vector Multiplication in Cluster Environment.- Wearable and Mobile Computing.- Middleware for Building Ubiquitous Computing Applications Using Distributed Objects.- A Suffix Tree Based Prediction Scheme for Pervasive Computing Environments.- Factors That Influence the Effectiveness of Mobile Advertising: The Case of SMS.- An Improved HCI Method and Information Input Device Using Gloves for Wearable Computers.- Computer Graphics, Virtual Reality and Visualization.- Efficient Parameterization of 3D Point-Sets Using Recursive Dynamic Base Surfaces.- Interactive Dynamics for Large Virtual Reality Applications.- A Pictorial Human Computer Interaction to Query Geographical Data.- AI, Machine Learning and Knowledge Bases.- Bagging Model Trees for Classification Problems.- On the Utility of Incremental Feature Selection for the Classification of Textual Data Streams.- Gossip-Based Greedy Gaussian Mixture Learning.- A Knowledge Management Architecture for 3D Shapes and Applications.- Using Fuzzy Cognitive Maps as a Decision Support System for Political Decisions: The Case of Turkey’s Integration into the European Union.- Languages, Text and Speech Processing.- Developing a Robust Part-of-Speech Tagger for Biomedical Text.- Weaving Aspect-Oriented Constraints into Metamodel-Based Model Transformation Steps.- A Graphical Rule Authoring Tool for Defeasible Reasoning in the Semantic Web.- Bioinformatics.- Initial Experiences Porting a Bioinformatics Application to a Graphics Processor.- Improving the Accuracy of Classifiers for the Prediction of Translation Initiation Sites in Genomic Sequences.- A New Test System for Stability Measurement of Marker Gene Selection in DNA Microarray Data Analysis.- Protein Classification with Multiple Algorithms.- Computational Identification of Regulatory Factors Involved in MicroRNA Transcription.- Web Service-Enabled Grid-Based Platform for Drug Resistance Management.- Software Engineering.- The Enhancement of Class Model Development Using Business Rules.- Scenario Networks: Specifying User Interfaces with Extended Use Cases.- Educational Technologies.- Teaching Programming with Robots: A Case Study on Greek Secondary Education.- ASPIS: An Automated Information System for Certification and Analysis of Examination Process.- Bridging the Contextual Distance: The e-CASE Learning Environment for Supporting Students’ Context Awareness.- Designing Mobile Learning Experiences.- E-Business.- From e-Business to Business Transformation.- Trust, Privacy and Security in E-Business: Requirements and Solutions.- Adoption of Enterprise Resource Planning Systems in Greece.- Supply Chains of the Future and Emerging Consumer-Based Electronic Services.- Computer and Sensor Hardware and Architecture.- A Quantum Computer Architecture Based on Semiconductor Recombination Statistics.- TSIC: Thermal Scheduling Simulator for Chip Multiprocessors.- Tuning Blocked Array Layouts to Exploit Memory Hierarchy in SMT Architectures.- A Tool for Calculating Energy Consumption in Wireless Sensor Networks.- Hardware Support for Multithreaded Execution of Loops with Limited Parallelism.- A Low – Power VLSI Architecture for Intra Prediction in H.264.- Reducing TPC-H Benchmarking Time.- Computer Security.- CryptoPalm: A Cryptographic Library for PalmOS.- On the Importance of Header Classification in HW/SW Network Intrusion Detection Systems.- NGCE – Network Graphs for Computer Epidemiologists.- Workflow Based Security Incident Management.- A Deterministic Approach to Balancedness and Run Quantification in Pseudorandom Pattern Generators.- Image and Video Processing.- Protecting Intellectual Property Rights and the JPEG2000 Coding Standard.- Computationally Efficient Image Mosaicing Using Spanning Tree Representations.- An MPEG-7 Based Description Scheme for Video Analysis Using Anthropocentric Video Content Descriptors.- Detecting Abnormalities in Capsule Endoscopic Images by Textural Description and Neural Networks.- Unsupervised Learning of Multiple Aspects of Moving Objects from Video.- The Feature Vector Selection for Robust Multiple Face Detection.- Signal Processing and Telecommunications.- A Low Complexity Turbo Equalizer.- Bit Error Rate Calculation for DS-CDMA Systems with WDS in the Presence of Rayleigh Fading and Power-Control Error.- Multivariate AR Model Order Estimation with Unknown Process Order.- Cortical Lateralization Analysis by Kolmogorov Entropy of EEG.- Computer and Sensor Networks.- Source-Based Minimum Cost Multicasting: Intermediate-Node Selection with Potentially Low Cost.- Efficient Active Clustering of Mobile Ad-Hoc Networks.- Evaluation of Audio Streaming in Secure Wireless Access Network.- Reliable Transmission Using Intermediate Sink or Source Nodes in Sensor Networks.- A Novel Heuristic Routing Algorithm Using Simulated Annealing in Ad Hoc Networks.- Balancing HTTP Traffic Using Dynamically Updated Weights, an Implementation Approach.- Industrial Exhibition Paper.- A Review of Microsoft Products, Strategy and Technologies.