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Nektarios KozyrisView profile

Professor

• Parallel and Distributed Systems
• Computer Architecture
• High-Performance Computing
• +5 more

Nektarios Kozyris is a Professor of Computer Science and former Dean of the School of Electrical and Computer Engineering at the National Technical University of Athens (NTUA). He holds a PhD and Diploma in Electrical and Computer Engineering from NTUA. His research focuses on parallel and distributed systems, computer architecture, high-performance computing, and cloud infrastructure. He has authored over 180 papers and contributed to major projects like the Okeanos public cloud and Synnefo open-source software. Kozyris has led EU initiatives such as ACTiCLOUD and EuroEXA, and advises startups like Arrikto. He is a senior member of the ACM, IEEE Computer Society, and co-founder of the Greek Free/Open Source Software Society (GFOSS). His academic roles include teaching courses on computer architecture, operating systems, and distributed systems. Awards include Best Paper Awards at IPDPS 2001 and CCGRID 2013, and Intel's recognition for research in transactional memory. He actively contributes to conferences as a PC member and co-chair, and has supervised numerous PhD students in areas like distributed systems and sparse matrix computations. Kozyris pioneered the ~okeanos cloud infrastructure and advanced storage systems like Pithos. His work on GridTorrent and XOROS demonstrates innovation in data management and peer-to-peer systems. Current research includes elastic resource provisioning, quantum machine learning, and FPGA-based acceleration. His labs at NTUA and collaborations with institutions like ICCS and IMIS drive advancements in computing systems and software engineering.

Vasilis SamoladasView profile

Associate Professor

• Computational Geometry
• Complexity Theory
• Database Complexity
• +3 more

Vasilis Samoladas is an Associate Professor at the School of Electrical and Computer Engineering of the Technical University of Crete. He holds a PhD (2001) and an MSc (1995) in Computer Science from the University of Texas at Austin, and a Diploma in Electrical Engineering from Aristotle University of Thessaloniki (1992). His research focuses on computational geometry, complexity theory, database systems, distributed systems, and quantum computation. He has published in leading journals such as JACM and Algorithmica, and conferences like PODS and VLDB. He received a Best Paper Award at PODS'98 and has served on program committees for SIM, AAMAS, and others. He coordinates High-Performance Computing initiatives at TU Crete and leads the Software and Networked Systems Lab (Softnet). Education: Ph.D. in Computer Science, University of Texas at Austin, 2001 M.Sc. in Computer Science, University of Texas at Austin, 1995 Diploma in Electrical Engineering, Aristotle University of Thessaloniki, 1992 Research interests include distributed information systems, parallel programming, and multidimensional range searching. He teaches courses on operating systems, distributed systems, computational geometry, and algorithms. Awards: Best Paper Award at PODS'98 Grants: Attracted funding from national and EU sources. Labs/Teams: Scientific coordinator of High-Performance Computing at TU Crete; member of the Software Technology and Network Applications Laboratory and Softnet Lab.

• Distributed Computing
• Parallel Computing
• Peer-to-Peer Systems
• +3 more

Prof. Paraskevi Fragopoulou is a Professor of Computer Science at the Department of Electrical & Computer Engineering, Hellenic Mediterranean University, Greece. She holds a diploma from the University of Crete (1989), M.S. and Ph.D. from Queen’s University, Canada (1990, 1995). Her research focuses on Distributed and Parallel Computing , Peer-to-Peer Systems , Grid Computing , and Computer Networks . She has co-authored over 70 publications and participated in projects funded by the European Commission and Greek Government. Education Computer Science Diploma, University of Crete (1989) M.S. in Computer Science, Queen’s University, Canada (1990) Ph.D. in Computer Science, Queen’s University, Canada (1995) Scientific Awards Marie-Curie European Fellowship Research & Collaborations She has conducted research at École Normale Supérieure de Lyon, UNI-C (Denmark), Université Paris-Sud, and Université de Versailles. Her work spans distributed systems , parallel computing , and network technologies , with participation in numerous European and national projects.

Christos DoulkeridisView profile

Professor

• Parallel and Distributed Query Processing
• Large-Scale Data Management
• Spatio-Temporal Data Management
• +4 more

Christos Doulkeridis is a Professor at the Department of Digital Systems, University of Piraeus, Greece. He specializes in parallel and distributed query processing, large-scale data management, and spatio-temporal data systems. His work focuses on optimizing big data frameworks for mobility analytics and distributed knowledge discovery. He holds a PhD from Athens University of Economics and Business (2007) and has been involved in several EU-funded projects like EMERALDS, Green.DAT.AI, and MobiSpaces as Principal Investigator or Coordinator. Education: PhD in Informatics (2007), Athens University of Economics and Business M.Sc. in Information Systems (2003), Athens University of Economics and Business Diploma in Electrical and Computer Engineering (2001), National Technical University of Athens Awards: Best Paper Awards at SIGSPATIAL, SSTD, EuroVA Marie-Curie and ERCIM Fellowships SemEval 2017 Task 4 & 6 competition wins His research interests include scalable data processing frameworks, mobility data analytics, and spatio-temporal query optimization. He leads projects like MobiSpaces (Horizon Europe), aiming to create energy-efficient data spaces for mobility data. He has published over 100 papers in top venues like EDBT, SIGMOD, and ICDE, focusing on distributed systems, query processing, and machine learning applications in data management. Teaching: He teaches undergraduate and graduate courses in data structures, data analysis, big data processing, and database systems at the University of Piraeus. His courses integrate practical tools like Spark and Hadoop for real-world data challenges.

Nikos PelekisView profile

Lecturer

• Data Mining
• Spatiotemporal Databases
• Mobility Data Analysis
• +2 more

Nikos Pelekis is a Lecturer at the Department of Statistics and Insurance Science and a researcher at the Information Management Group in the Department of Informatics at the University of Piraeus. His research specializes in mobility data management, spatiotemporal databases, and knowledge discovery from moving objects. Research Focus: Design of trajectory database engines (HERMES) Semantic-aware mobility data mining Privacy-preserving techniques for sensitive trajectory data Key Achievements: Best Paper Award at ER'13 and IEEE ICDM'09 Author of "Mobility Data Management and Exploration" monograph Principal researcher in EU projects including GeoPKDD and MODAP

• Parallel Algorithms & Architectures
• Distributed Systems & Databases
• Multiprocessor Operating Systems
• +5 more

Vassilios Mamalis is a full Professor at the University of West Attica (UniWA) in the Department of Informatics and Computer Engineering, and an external academic partner at the Hellenic Open University (HOU). He holds a Diploma and Ph.D. in Computer Engineering and Informatics from the University of Patras (1993 and 1998). His career includes over 25 years of academic and research experience, with roles at the Technological Educational Institute of Athens and RACTI. His research focuses on parallel algorithms, distributed systems, wireless sensor networks, cloud computing, and information retrieval. Education: 1988-1993: Diploma in Computer Engineering & Informatics, University of Patras 1994-1998: Ph.D. in Computer Engineering & Informatics, University of Patras Research Interests include: Parallel Algorithms & Architectures Distributed Systems & Databases Wireless Sensor Networks Cloud Computing & IoT Information Retrieval He has authored 15+ journal articles , contributed to 2 books, and participated in numerous EU and Greek government-funded research programs. His teaching spans undergraduate and postgraduate courses in Operating Systems, Parallel Computing, and Distributed Systems. Current doctoral advisees include Vasiliki Giannou and Leontios Sotiriadis. Research contributions include work on energy-efficient WSN clustering, hybrid GPU-CPU parallelization, and cloud task scheduling. He has led projects like the PROSENS and PROTEAS initiatives, and serves on editorial boards and conference committees.

Ilias SakellariouView profile

Assistant Professor

• Constraint Logic Programming
• Multi-Agent Systems
• Artificial Intelligence
• +3 more

Ilias Sakellariou is an Assistant Professor in the Department of Applied Informatics at the University of Macedonia. He holds a BSc in Physics from Aristotle University of Thessaloniki, an MSc in Knowledge-Based Systems from the University of Edinburgh, and a PhD in Distributed Constraint Logic Programming from Aristotle University of Thessaloniki. Education: BSc in Physics, Aristotle University of Thessaloniki MSc in Knowledge-Based Systems, University of Edinburgh PhD in Distributed Constraint Logic Programming, Aristotle University of Thessaloniki Research Interests: Constraint Logic Programming, Multi-Agent Systems (BDI, Agent-Based Simulation), AI applications in 5G networks, cloud/network slicing, and distributed systems. His work includes projects like NECOS (cloud slicing) and UNIC (5G network infrastructure). Publications: His research spans agent-based modeling, network slicing, and AI-driven systems. Recent works focus on emotional agents in simulations and 5G infrastructure optimization. Projects & Grants: Participated in EU-funded projects such as NECOS (H2020) and UNIC (FED4FIRE+), contributing to cloud slicing and network architecture design. His work includes software tools like TXStates (NetLogo extensions for state machines) and eX-Machines for evacuation simulations. Labs/Teams: Develops simulation tools for agent-based systems, emphasizing NetLogo extensions for complex agent modeling and validation.

Doulkeridis ChristosView profile

Professor

• Big Data
• Data Management in Cloud Computing
• Query Processing
• +5 more

Christos Doulkeridis is a Professor at the Department of Digital Systems, University of Piraeus. Specializing in big data management, distributed systems, and mobility analytics, he has led projects such as CHOROLOGOS (ELIDEK-funded) and contributed to EU initiatives like datAcron and Track&Know. He holds Marie-Curie and ERCIM fellowships, and his work emphasizes energy-efficient data architectures and semantic trajectory analysis. Education: PhD in Informatics, Athens University of Economics and Business (2007) MSc in Informatics, Athens University of Economics and Business (2003) Diploma in Electrical & Computer Engineering, National Technical University of Athens (2001) Research Interests: Big data analytics, cloud computing, spatiotemporal query processing, mobility forecasting (e.g., traffic patterns, maritime monitoring), and semantic trajectory modeling. His work bridges theory with practical applications in smart cities and environmental sustainability. Awards: Winner of SemEval’17 Task4 (sentiment analysis) Best Paper Award at EuroVA’19 Michalis Dertouzos Award (2004) for Human Face of Computing Grants & Projects: Principal Investigator for CHOROLOGOS (semantic spatiotemporal data) Core contributor to datAcron (maritime data ontology) European projects: BigDataStack, RoadRunner (ARISTEIA II) Labs & Teams: Leads research teams developing frameworks like SPARTAN (semantic integration) and ARGO (trajectory prediction). Collaborates on open-source tools like ST_VISIONS (spatiotemporal visualization) and NoDA (unified NoSQL access).

Christos NomikosView profile

Associate Professor

• Algorithm Design and Analysis
• Approximation Algorithms
• Computational Complexity
• +3 more

Christos Nomikos is an Associate Professor at the Department of Computer Science and Engineering, University of Ioannina. He holds a PhD from the National Technical University of Athens (NTUA) and has been a faculty member since 2003. His roles include teaching and research supervision in computer science disciplines. Education: Diploma in Electrical Engineering, NTUA, 1992 PhD in Computer Science, NTUA, 1997 Research Interests: Christos Nomikos focuses on theoretical computer science and logic, including algorithm design and analysis, computational complexity, formal languages, logic programming, and graph theory. His work explores foundational aspects of programming languages and their semantics, as well as applications in knowledge representation and automated reasoning. Teaching: In the 2024-25 academic year, he teaches Discrete Mathematics II , Principles of Programming Languages , Computational Complexity , and Approximation Algorithms . He emphasizes structured learning approaches and maintains a dedicated ecourse page for students. Advising & Grants: He supervises undergraduate thesis projects in computer science, with a focus on theoretical topics like Turing machine transformations and Boolean grammar algorithms. No explicit grant information is provided in the texts. His advising process involves rigorous academic evaluation and prefers candidates with strong performance in core computer science courses. Labs/Teams: While no specific lab or team affiliations are mentioned, his research collaborations include work with international conferences and journals, indicating active participation in academic networks.

Zisimopoulos VassiliosView profile

Associate Professor

• Combinatorial Optimization
• Operations Research
• Algorithms
• +3 more

Zisimopoulos Vassilios is an Associate Professor at the Department of Informatics, National and Kapodistrian University of Athens. He holds an Emeritus Professor capacity and has held roles including Professor at the University of Paris-Nord and Maitre de Conferences at ORSAY University. His research focuses on Combinatorial Optimization, Algorithms, Graph Theory, and Parallel Systems. He has led research initiatives such as the 'Parallel and Distributed Algorithms' axis at LRI, ORSAY. Education: Habilitation (1996, ORSAY), PhD (1984), DEA (1982) in Computer Science from ORSAY; Master's (1980) and Mathematics Degree (1978) from Athens University. His professional career includes roles at ALFA S.A., Army General Staff (HERMES Program), and EDF. He teaches courses on Algorithmic Operations Research and Complexity. No awards or recent publications are explicitly listed in the provided text.

Ioannis T. ChristouView profile

Associate Professor

• Scalable Data Mining
• Parallel and Distributed Computing
• Optimization
• +3 more

Ioannis T. Christou is an Associate Professor of Information Technology at Deree – The American College of Greece (ACG). He concurrently serves as Senior Research Data Scientist at INTRASOFT Intl, Lux. With over 25 years of combined academic and industrial experience, his roles include teaching at multiple institutions and research leadership. Education: MBA in Business Administration, Athens University of Economics and Business (2004–2006) MSc & PhD in Computer Science, University of Wisconsin – Madison (1991–1996) Engineer’s Degree in Electrical Engineering, National Technical University of Athens (1985–1991) His research focuses on Scalable Data Mining , Parallel and Distributed Computing , Optimization , and Computational Intelligence . He has authored over 90 publications and a book, and serves as Academic Editor for the Mathematical Problems in Engineering journal. Dr. Christou has taught as Full Professor at AIT (Greece), Adjunct Professor at Carnegie-Mellon University (USA), Aalborg University (Denmark), Democritus University of Thrace, and the University of Patras (Greece).

• Computational Geometry
• Algorithmic Complexity in Multidimensional Problems
• Database Complexity
• +5 more

Vasilis Samoladas is an Associate Professor at the School of Electrical and Computer Engineering, Technical University of Crete. His research spans computational geometry, database complexity, distributed systems, and parallel programming, with a focus on algorithmic challenges in multidimensional problems and quantum computing. PhD and MSc in Computer Science from University of Texas at Austin Diploma in Electrical Engineering from Aristotle University of Thessaloniki Research Interests: His work addresses fundamental issues in computational geometry, database complexity, and distributed information systems. He has contributed to external memory data structures and multidimensional algorithmic complexity. Scientific Contributions: He has published in top-tier venues like JACM, Algorithmica, PODS, and VLDB, and served on numerous international conference program committees, including roles as chairman for HDMS'08. Best publication award winner at PODS'98 Scientific director for TUC's High Performance Computing Infrastructure Laboratory Affiliation: Member of the Software Systems and Network Applications Technology Laboratory.

• Parallel Computing
• Distributed Systems
• Multiprocessor Operating Systems
• +5 more

Vasilios Mamalis is a Professor at the Department of Informatics and Computer Engineering, University of West Attica, and a member of the Collaborating Scientific Staff at the Hellenic Open University's Informatics program. His academic career spans decades with significant contributions to parallel and distributed computing, wireless sensor networks, and cloud technologies. Education: Diploma in Computer Engineering and Informatics, University of Patras (1993) PhD in Computer Engineering and Informatics, University of Patras (1998) Research Interests focus on parallel algorithms, distributed systems, wireless sensor networks, cloud computing, and information retrieval. His work addresses energy efficiency in ad-hoc networks, optimization techniques, and educational technology applications. Publication Trends show extensive work on WSN clustering, cloud task scheduling, parallel simplex methods, and fog computing applications in education and urban systems. He combines metaheuristics with infrastructure optimization in large-scale networks. Scientific Contributions include editorial roles in the Journal of Balkan Libraries Union and program committee memberships in international conferences. He actively reviews for journals and conferences in computing. Teaching Expertise covers operating systems, parallel computing, distributed systems, and cloud technologies at both undergraduate and postgraduate levels. His Research Leadership involves EU/Greek-funded projects on communication protocols, parallel content-based retrieval, and wireless sensor networks.

Christos KaklamanisView profile

Professor

• Algorithm design and analysis
• Computational complexity
• Communication networks
• +7 more

Christos Kaklamanis is a Full Professor and Chair of the Department of Computer Engineering and Informatics at the University of Patras, Greece, with significant leadership roles including President of Computer Technology Institute & Press "Diophantus" (CTI) from 2016-2021. His academic career includes serving as Vice-Chair of the Department (2009-2011 and 2003-2005) and Director of the Division of Applications and Foundations of Computer Science (1997-2003). Dr. Kaklamanis earned his S.B. in Computer Science and Engineering from MIT (1986), followed by S.M. (1989) and Ph.D. (1992) from Harvard University. He completed postdoctoral work at DIMACS (Center for Discrete Mathematics and Theoretical Computer Science) and worked as a research consultant for NEC Research Institute, Princeton. His research spans theoretical and applied computer science with expertise in algorithm design, computational complexity, communication networks, parallel and distributed computing, and algorithmic game theory. He has made significant contributions to network algorithms, particularly in optical networks and wireless communication, with recent expansion into computational social choice and educational technology applications. His work bridges theoretical foundations with practical implementations, especially in developing educational tools that make complex algorithms accessible. Analysis of his publication history reveals an evolution from foundational algorithm research toward practical applications of theoretical concepts, particularly in educational technology and community-oriented computing solutions. His recent work focuses on creating web and mobile applications that address real-world challenges in campus management, cultural tourism, and community engagement while maintaining strong theoretical underpinnings. Elected member of EATCS council (2009-2021) Active in ACM, IEEE, SIAM, and Technical Chamber of Greece Program Committee Chair for WAOA (Workshop on Approximation and Online Algorithms) Conference co-chair for ICALP (International Colloquium on Automata, Languages and Programming) As an educator, Dr. Kaklamanis has taught core courses including Theory of Computation, Parallel Algorithms, Communication Algorithms, and Cryptography. He has led major research initiatives including EU-FET projects CRESCCO and AEOLUS (as coordinator), EU-ICT Project EULER, and the "DIGITAL SCHOOL" project focused on national educational platforms. His leadership extends to directing research laboratories in Combinatorial Algorithms, Distributed Systems and Telematics, and Pattern Recognition. His current work continues to bridge theoretical computer science with practical applications, particularly in educational technology, with numerous recent publications focused on developing interactive learning tools and platforms that leverage algorithmic principles for educational and community benefit.

Kontogiannis SpyridonView profile

Associate Professor

• Algorithmic Game Theory
• Direct Response Algorithms and Approximation Algorithms
• Foundations of Parallel and Distributed Computing Systems
• +1 more

Kontogiannis Spyridon serves as an Associate Professor in the Division of Applications and Foundations of Computer Science at the University of Patras, where he contributes to both teaching and research activities within the Department of Computer Engineering and Informatics. His research expertise spans theoretical computer science with particular emphasis on: Algorithmic Game Theory - analyzing strategic interactions through computational models Direct Response Algorithms and Approximation Algorithms - developing efficient computational methods Foundations of Parallel and Distributed Computing Systems - researching architectures for multi-processor and networked environments Computational Complexity - investigating the inherent difficulty of computational problems As part of the Division of Applications and Foundations of Computer Science, his work contributes to examining fundamental mathematical properties of computing systems, exploring computational boundaries, and investigating algorithm design principles across various computational models. His research aligns with the division's specialized laboratories including the Combinatorial Algorithms Laboratory and Distributed Systems and Telematics Laboratory. Professional activities include participation in academic conferences such as DOCSS and ICALP mentioned in connection with the division's research portfolio. His work supports the department's mission of bridging theoretical computer science with practical applications in evolving technological domains.