Areas of interest

• Machine Learning
• Machine Translation
• Distributed Systems
• Object-oriented programming, design and modelling

CV data

• December 2005 – now: National Technical University of Athens School of Electrical and Computer Engineering: PhD candidate, Thesis title: “Language Modelling for Machine Translation Systems” 
• October 2002 - October 2003: Heriot-Watt University, Edinburgh, United Kingdom: MSc in Distributed and Multimedia Information Systems Dissertation title: “Adding Stream Republishers to a GRID monitoring environment.” 
• October 1997 - January 2002: University Of Ioannina, Degree in Computer Science
• March 2005 – now: Institute for Language and Speech Processing, Machine Translation Department: Part of the design team and implementation of the METIS Machine Translation System for the IST program "METIS II: Statistical Machine Translation using Monolingual Corpora: from Concept to Implementation"
• August 2003 - February 2004: Interlingua foreign languages group: 280 hours teaching advanced courses in Java, HTML, relational databases, Visual Basic. Scientific supervisor of training program: «Στελέχη ανάπτυξης λογισμικού εφαρμογών με εξειδίκευση σε Visual Basic 6.0 και SQL Server 2000»
• October 2001 - September 2002: Unit of Medical Technology and Intelligent Information Systems, University of Ioannina (Medlab – IBRI): Distant Learning Editor Implementation in Delphi & creation of help system. Design & implementation of User Interface and database for project US-Bone (IST-2000-26350). Design & implementation of User Web Interface for project H-Life (IST-2000-26353)
• June 2000 – September 2000: Systema Informatics: Design & implementation of the Linguaphone web-based e-learning platform (ASP, SQL Server)

• Papavassiliou, V., Sofianopoulos, S., Prokopidis, P. & Piperidis, S. (2018). The ILSP/ARC submission to the WMT 2018 Parallel Corpus Filtering Shared Task. In Proceedings of the Third Conference on Machine Translation: Shared Task Papers, pages 928-933. Belgium, Brussels : Association for Computational Linguistics. [...] 
• Tambouratzis, G., Vassiliou, M. & Sofianopoulos, S (2016). Language-independent hybrid MT: Comparative evaluation of translation quality. Hybrid Approaches to Machine Translation. Springer. [...] 
• Piperidis, S., Galanis, D., Juli Bakagianni & Sofianopoulos, S. (2015). A Data Sharing and Annotation Service Infrastructure. Proceedings of ACL-IJCNLP 2015 System Demonstrations, 97-102. [...] 
• Piperidis, S., Galanis, D., Juli Bakagianni & Sofianopoulos, S. (2015). Combining and extending data infrastructures with linguistic annotation services. In International Workshop on Worldwide Language Service Infrastructure, pages 3-17. [...] 
• Tambouratzis, G., Vassiliou, M. & Sofianopoulos, S. (2014). PRESEMT: A hybrid machine translation system based on large monolingual corpora. In selected papers of the 11th International Conference on Greek Linguistics, pages pp. 1642-1654. Rhodes. [...] 
• Tambouratzis, G., Vassiliou, M. & Sofianopoulos, S. (2013). Hybrid Machine Translation EL-EN system based on large monolingual corpora. In Proceedings of ICGL-2013 Conference, pages 180. Rhodos, Greece. [...] 
• Tambouratzis, G., Sofianopoulos, S. & Vassiliou, M. (2013). Language-independent hybrid MT with PRESEMT. In Proceedings of HYTRA-2013 Workshop, held within the ACL-2013 Conference, pages 123-130. Sofia, Bulgaria. [...] 
• Tambouratzis, G., Vassiliou, M. & Sofianopoulos, S. (2013). A Review of the PRESEMT project.. In Sima'an, K., Forcada, M.L., Grasmick, D. et al (editors), Proceedings of the XIV Machine Translation Summit, pages 437. Nice, France. [...] 
• Tambouratzis, G., Vassiliou, M. & Sofianopoulos, S. (2012). PRESEMT: Pattern Recognition-based Statistically Enhanced MT. In Proceedings of the Joint Workshop on Exploiting Synergies between Information Retrieval and Machine Translation (ESIRMT) and Hybrid Approaches to Machine Translation (HyTra) at EACL-2012, pages 65-68. Avignon, France. [...] 
• Tambouratzis, G., Troullinos, M., Vassiliou, M. & Sofianopoulos, S. (2012). Accurate phrase alignment in a bilingual corpus for EBMT systems. In Reinhard Rapp, Marko Tadić, Serge Sharoff & Pierre Zweigenbaum (editors), Proceedings of the 5th Workshop on Building and Using Comparable Corpora at LREC 2012, pages 104-111. Istanbul, Turkey. [...] 
• Sofianopoulos, S., Vassiliou, M. & Tambouratzis, G. (2012). Implementing a language-independent MT Methodology. In Jagadeesh Jagarlamudi, Sujith Ravi, Xiaojun Wan & Hal Daume III (editors), Proceedings of the First Workshop on Multilingual Modeling (ACL 2012), pages 1-10. Jeju, Republic of Korea : Association for Computational Linguistics. [...] 
• Tambouratzis, G., Sofianopoulos, S. & Vassiliou, M. (2012). Evaluating the translation accuracy of a novel language-independent MT methodology. In Martin Kay & Christian Boitet (editors), Proceedings of the 24th International Conference on Computational Linguistics (COLING 2012), pages 2569-2584. Mumbai, India : The COLING 2012 Organizing Committee. [...] 
• Tambouratzis, G., Sofianopoulos, S., Vassiliou, M., Simistira, F. & Tsimboukakis, N. (2011). A resource-light phrase scheme for language-portable MT. In M.L. Forcada, H. Depraetere & V. Vadeghinste (editors), Proceedings of the 15th International Conferecne of the European Association for Machine Translation, pages 185-192. Leuven, Belgium. [...] 
• Sofianopoulos, S. & Tambouratzis, G. (2011). Studying the SPEA2 Algorithm for Optimising a Pattern-Recognition Based Machine Translation System. In Proceedings of the 2011 IEEE Symposium on Computational Intelligence in Multicriteria Decision-Making (MCDM 2011), pages 97-104. Paris, France : IEEE PRESS. [...] 
• Sofianopoulos, S. & Tambouratzis, G. (2010). Multi-objective optimisation of real-valued parameters of a hybrid MT system using Genetic Algorithms. Pattern Recognition Letters, 31(12), 1672-1682. [...] 
• Markantonatou, S., Sofianopoulos, S., Yannoutsou, O. & Vassiliou, M (2009). Hybrid Machine Translation for Low- and Middle- Density Languages. In S. Nirenburg (editor), Language Engineering for Lesser-studied Languages, NATO Science for Peace and Security Series - D: Information and Communication Security 21. [...] 
• Schmidt, P., Vandeghinste, V., Dirix, P., Schuurman, I., Markantonatou, S., Sofianopoulos, S. et al. (2008). Evaluation of a Machine Translation System for Low Resource Languages: METIS-II. In Calzolari N., Choukri K., Maegaard B., Mariani J., Odjik J., Piperidis S. et al (editors), Proceedings of the Sixth International Language Resources and Evaluation (LREC'08), pages 449-456. Marrakech, Morocco. [...] 
• Sofianopoulos, S., Tambouratzis, G. & Carayannis, G. (2008). Parameter Optimisation of MT Systems Operating on Monolingual Corpora Employing a Genetic Algorithm. In Marik V., Bradshaw J.M., Meyer J., Gruver W.A. & Benda P. (editors), Proceedings of the IEEE International Conference on Distributed Human-Machine Systems (DHMS’08), pages 260-265. Αθήνα, Ελλάδα : IEEE PRESS. [...] 
• Carl, M., Melero, M., Badia, T., Vandeghinste, V., Dirix, P., Schuurman, I. et al. (2008). METIS-II: low resource machine translation. Machine Translation, 22(1-2), 67-99. [...] 
• Markantonatou, S., Sofianopoulos, S., Spilioti, V., Tambouratzis, G., Vassiliou, M. & Yannoutsou, O. (2007). An MT System Embedding Pattern Knowledge. In Van Eynde F., V, Eghinste V. & Schuurman I. (editors), Proceedings of the 'New Approaches to Machine Translation' workshop held in conjunction with the 17th Meeting of Computational Linguistics in the Netherlands (CLIN 2007), pages 11-18. Leuven, Belgium. [...] 
• Sofianopoulos, S., Spilioti, V., Vassiliou, M., Yannoutsou, O. & Markantonatou, S. (2007). Demonstration of the Greek to English METIS-II MT System. In Way A. & Gawronska B. (editors), Proceedings of the 11th International Conference on Theoretical and Methodological Issues in Machine Translation (TMI-07), pages 199-205. Skovde, Sweden,. [...] 
• Markantonatou, S., Sofianopoulos, S., Spilioti, V., Tambouratzis, G., Vassiliou, M. & Yannoutsou, O. (2006). Using Patterns for Machine Translation (MT). In George Potamias, Lonning J.T. & Oepen S. (editors), Proceedings of EAMT 11th Annual Conference, pages 239-246. Oslo, Norway. [...] 
• Tambouratzis, G., Sofianopoulos, S., Spilioti, V., Vassiliou, M., Yannoutsou, O. & Markantonatou, S. (2006). Pattern Matching-Based System for Machine Translation (MT). In G. Antoniou, G. Potamias, C. Spyropoulos & D. Plexousakis (editors), Advances in Artificial Intelligence: 4th Hellenic Conference on AI, pages 345-355. Heraklion, Greece : Springer-Verlag. [...] 
• Markantonatou, S., Sofianopoulos, S., Spilioti, V., Tambouratzis, G., Vassiliou, M., Yannoutsou, O. et al. (2005). Monolingual Corpus-based MT using Chunks. In Proceedings of the Workshop on EBMT, held within the MT Summit X, pages 91-98. Phuket, Thailand,. [...]