Marilena Bourdakou Title: Bioinformatics methods for the discovery of network signatures towards understanding of underlying molecular mechanisms and investigation of candidate drugs. Advisor: Emmanouil Sagkriotis, Associate Professor Konstantinos Chatzikokolakis Title: Spectrum sharing and management techniques in mobile networks. Advisor: Nancy Alonistioti, Assistant Professor Nikos Chondros Title: Byzantine fault-tolerant vote collection for D-DEMOS, a distributed e-voting system. Advisor: Mema Roussopoulos, Associate Professor Antonios Danelakis Title: Facial Expression Retrieval Using 3-Dimensional Mesh Sequences. Advisor: Theoharis Theoharis, Professor Christos Filippidis Title: Scaling storage systems for future eXascale environments. Advisor: Yiannis Cotronis, Associate Professor Dimitrios Kotsakos Title: Temporal Search in Document Streams. Advisor: Dimitrios Gunopoulos, Professor Eleni Koutrouli Title: Credible Reputation Systems for P2P e-Communities. Advisor: Aphrodite Tsalgatidou, Associate Professor George Papageorgiou Title: Robust Algorithms for Linear and Nonlinear Regression via Spare Modeling Methods: Theory, Algorithms and Applications to Image Denoising. Advisor: Sergios Theodoridis, Professor Archimedes Pavlidis Title: Design and Synthesis of Efficient Circuits for Quantum Computers. Advisor: Dimitris Gizopoulos, Professor Kosmas–Christos Tsilipanos Title: Tools and Methods for System of Systems Applications in Telecommunication Networks. Advisor: Dimitris Varoutas, Assistant Professor Stefanos Valadimas Title: Timing Error Detection and Correction for Reliable Integrated Circuits in Nanometer Technologies. Advisor: Angela Arapoyanni, Professor Thomas Zacharias Title: The DEMOS family of e-voting systems: End-to-end verifiable elections in the standard model. Advisor: Aggelos Kiayias, Associate Professor