Advances in Informatics

Processing Distance-Based Queries in Multidimensional Data Spaces Using R-trees.- A Simple, Compact and Dynamic Partition Scheme Based on Co-centric Spheres.- Design of the ERATOSTHENES OLAP Server.- Spatio-temporal SQL.- The Opsis Project: Materialized Views for Data Warehouses and the Web.- Two-Phase Commit Processing with Restructured Commit Tree.- On the Use of Matrices for Belief Revision.- Efficiently Maintaining Structural Associations of Semistructured Data.- Identification of Lead Compounds in Pharmaceutical Data Using Data Mining Techniques.- Adaptive Classification of Web Documents to Users Interests.- Seismo-Surfer: A Prototype for Collecting, Querying, and Mining Seismic Data.- Using Fuzzy Cognitive Maps as a Decision Support System for Political Decisions.- An Architecture for Open Learning Management Systems.- A Knowledge Based Approach on Educational Metadata Use.- Website Evaluation: A Usability-Based Perspective.- Concepts to Consider when Studying Computer-Mediated Communication and Online Learning.- Website Content Accessibility of the Cyprus Domain.- An Information Hiding Method Based on Computational Intractable Problems.- An Experimental Evaluation of a Monte-Carlo Algorithm for Singular Value Decomposition.- PROSOPO - A Face Image Synthesis System.- Communicating X-Machines: From Theory to Practice.- TOPPER: An Integrated Environment for Task Allocation and Execution of MPI Applications onto Parallel Architectures.- Communication Assist for Data Driven Multithreading.- A Framework for Mobility and QoS Provisioning in IPv6 DECT Networks.- High Level Timed Petri Net Templates for the Temporal Verification of Real-Time Multiprocessor Applications.- A Greek Morphological Lexicon and Its Exploitation by Natural Language Processing Applications.- A Comparison of Design Patterns and Roles in the Context of Behavioural Evolution.- A New Randomized Data Structure for the 1 1/2-dimensional Range Query Problem.- Acceptor-Definable Counting Classes.- Stability Behavior of FIFO Protocol in the Adversarial Queuing Model.- Sphendamnœ: A Proof that k-Splay Fails to Achieve logk N Behaviour.