Georgios Athanasopoulos Title: Data Driven Adaptation of Heterogeneous Service Oriented Processes. Advisor: Aphrodite Tsalgatidou, Associate Professor Angelos Charalambidis Title: Proof Procedures for Extensional Higher-Order Logic Programming. Advisor: Panos Rondogiannis, Associate Professor Haroula Delopoulos Title: Development of a Conceptual and Methodological Framework for the Identification and Management of Barriers and Opportunities in the Adoption of e-Government services. Advisor: Panayiotis Georgiadis, Emeritus Professor Vissarion Fisikopoulos Title: High-dimensional polytopes defined by oracles: algorithms, computations and applications. Advisor: Ioannis Z. Emiris, Professor Antonios Kargas Title: Organizational Structure, Operational Strategy, Indexes and Forecasting in the Telecommunication Market. Advisor: Dimitrios Varoutas, Assistant Professor Evangelia Kokolaki Title: Information dissemination and consumption in competitive networking urban environments. Advisor: Ioannis Stavrakakis, Professor Dimitrios Kontaxis Title: Rate-Optimum Beamforming Transmission in MIMO Rician Fading Channels. Advisor: Serafim Karaboyas, Assistant Professor Efthymios Koufogiannis Title: Algorithms for the Analysis and Processing of Autostereoscopic Images. Advisors: Manolis Sangriotis, Associate Professor John Liaperdos Title: Testing and Performance Calibration Techniques for Integrated RF Circuits. Advisors: Angela Arapoyanni, Professor Anastasia Lygizou Title: Interconnection between a Satellite Interactive Network and wireless broadband networks. Advisor: Lazaros Merakos, Professor Dimitris Manatakis Title: Distributed Signal Processing and Data Fusion Methods for Large Scale Wireless Sensor Network Applications. Advisor: Elias S. Manolakos, Associate Professor Dionisios Margaris Title: Advance BPEL execution adaptation using QoS parameters and collaborative filtering techniques. Advisor: Panayiotis Georgiadis, Emeritus Professor Eleftheria Mylona Title: Image Analysis and Processing with Applications in Proteomics and Medicine. Advisor: Dimitris Maroulis, Professor Panagiotis Pantazopoulos Title: Internet Content Management using Complex Network Analysis techniques. Advisor: Ioannis Stavrakakis, Professor Evangelos Pikasis Title: Advanced modulation schemes and signal processing techniques for transmission in highly multimode fibers. Advisor: Dimitris Syvridis, Professor Konstantinos Sfikas Title: Retrieval of 3-Dimensional Rigid and Non-Rigid Objects. Advisor: Theoharis Theoharis, Professor Dimitrios Tsolkas Title: Spatial spectrum reuse in heterogeneous wireless networks: interference management and access control. Advisor: Lazaros Merakos, Professor Georgios Valkanas Title: Mining and Managing User-Generated Content and Preferences. Advisor: Dimitrios Gunopulos, Professor Dionysis Xenakis Title: Localization and Mobility Management in Heterogeneous Wireless Networks with Network-Assistance. Advisor: Lazaros Merakos, Professor