Georgios Petasis - Personal Information...

Curriculum Vitae

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Georgios Petasis

Software and Knowledge Engineering Laboratory,
Institute of Informatics and Telecommunications,
National Centre for Scientific Research "Demokritos",
PO. BOX 60228, Ag. Paraskevi, 153 10 Athens, Greece.

Tel:	+30 210 6503158
Fax:	+30 210 6532175
e-mail:	petasis@iit.demokritos.gr petasisg@yahoo.gr
URL:	http://www.iit.demokritos.gr/~petasis/ http://www.ellogon.org/petasis/ http://www.ellogon.org/

INTERESTS

· Natural language processing, mainly with the use of machine learning algorithms.

· Development of named-entity recognition systems based on machine learning algorithms that can be easily adapted to new thematical domains and languages.

· Automated extraction of language resources, like morphological lexicons, rules for part-of-speech tagging, lists for recognising entities, ontologies, etc.

· Development of user friendly graphical interfaces for the development of tagged corpora.

· Development – exploitation of electronic lexicons.

· Natural Language Processing Platforms.

· Design and implementation of integrated infrastructures for natural language processing.

· Machine Learning Algorithms.

· Named-entity recognition with the use of grammatical inference.

· Development of new machine learning algorithms specialised for natural language processing.

EDUCATION

Jul. 1997:

B.Sc. in Physics, University of Crete, Greece. (Oct. 1992 - Jul. 1997)

PUBLICATIONS

1. G. Petasis, G. Paliouras, C.D. Spyropoulos and C. Halatsis, “eg-GRIDS: Context-Free Grammatical Inference from Positive Examples using Genetic Search”. In Proceedings of the 7th International Colloquium on Grammatical Inference (ICGI 2004), Lecture Notes in Artificial Intelligence 3264, pp. 223 – 234, Springer, 2004.

2. G. Petasis, V. Karkaletsis, C. Grover, B. Hachey, M. T. Pazienza, M. Vindigni, J. Coch: “Adaptive, Multilingual Named Entity Recognition in Web Pages”. In Proceedings of the 16^th European Conference on Artificial Intelligence (ECAI 2004), pp. 1073 – 1074, Valencia, Spain, August 22 – 27, 2004.

3. G. Petasis, G. Paliouras, V. Karkaletsis, C. Halatsis, and C.D. Spyropoulos, “e-GRIDS: Computationally Efficient Grammatical Inference from Positive Examples”. GRAMMARS, 2004. (to appear)

4. B. Gatos, S. J. Perantonis, V. Maragos, V. Karkaletsis and G. Petasis, “Text Area Identification in Web Images”. In Proceedings of the Panhellenic Conference in Artificial Intelligence (SETN 04), Lecture Notes in Artificial Intelligence 3025, Springer Verlag, Samos, Greece, May 2004.

5. G. Petasis, V. Karkaletsis, D. Farmakiotou, I. Androutsopoulos, and C.D. Spyropoulos. “A Greek Morphological Lexicon and its Exploitation by Natural Language Processing Applications”. In Lecture Notes on Computer Science (LNCS), vol.2563, "Advances in Informatics - Post-proceedings of the 8th Panhellenic Conference in Informatics", Springer Verlag, 2003.

6. G. Petasis, V. Karkaletsis, G. Paliouras and C. D. Spyropoulos, “Using the Ellogon Natural Language Engineering Infrastructure”. In Proceedings of the Workshop on Balkan Language Resources and Tools, 1^st Balkan Conference in Informatics (BCI’2003), Thessaloniki, Greece, November 21, 2003. (http://www.iit.demokritos.gr/skel/bci03_workshop/papers/SESSION5_2-23_Petasis.pdf)

7. G. Petasis, V. Karkaletsis, and C. D. Spyropoulos, “Cross-lingual Information Extraction from Web pages: the use of a general-purpose Text Engineering Platform”. In Proceedings of the 4^th International Conference on Recent Advances in Natural Language Processing (RANLP 2003), Borovets, Bulgaria, pp 381–388, September 10 – 12, 2003.

8. G. Petasis, V. Karkaletsis, G. Paliouras, I. Androutsopoulos and C. D. Spyropoulos, “Ellogon: A New Text Engineering Platform”. In Proceedings of the 3^rd International Conference on Language Resources and Evaluation (LREC 2002), Las Palmas, Canary Islands, Spain, pp. 72-78, May 2002.

9. C. Grover, S. McDonald, D. N. Gearailt, V. Karkaletsis, D. Farmakiotou, G. Samaritakis, G. Petasis, M. T. Pazienza, M. Vindigni, F. Vichot and F. Wolinski, “Multilingual XML-Based Named Entity Recognition for E-Retail Domains”. In Proceedings of the 3^rd International Conference on Language Resources and Evaluation (LREC 2002), Las Palmas, Canary Islands, Spain, May 2002.

10. G. Petasis, V. Karkaletsis, D. Farmakiotou, G. Samaritakis, I. Androutsopoulos, C. D. Spyropoulos, “A Greek Morphological Lexicon and its Exploitation by a Greek Controlled Language Checker”. In Proceedings of the 8^th Panhellenic Conference on Informatics, Nicosia, Cyprus, vol. 1, pp. 80-89, 8 – 10 November 2001.

11. G. Petasis, F. Vichot, F. Wolinski, G. Paliouras, V. Karkaletsis, C. D. Spyropoulos, “Using Machine Learning to Maintain Rule-based Named – Entity Recognition and Classification Systems”. In Proceedings of the 39^th Conference of Association for Computational Linguistics (ACL-EACL 2001), pp. 418 – 425, July 9 – 11 2001, Toulouse, France.

12. G. Petasis, S. Petridis, G. Paliouras, V. Karkaletsis, S. Perantonis, and C.D. Spyropoulos, “Symbolic and Neural Learning of Named-Entity Recognition and Classification Systems in Two Languages,” In Advances in Computational Intelligence and Learning: Methods and Applications, H–J. Zimmermann, G. Tselentis, M. van Someren and G. Dounias (eds), Kluwer Academic Publishers, 2001.

13. G. Petasis, S. Petridis, G. Paliouras, V. Karkaletsis, S. J. Perantonis, C. D. Spyropoulos, “Symbolic and Neural Learning for Named-Entity Recognition”. In Proceedings of European Best Practice Workshops and Symposium on Computational Intelligence and Learning (COIL 2000), June 19 – 23 2000, Chios, Greece.

14. G. Petasis, A. Cucchiarelli, P. Velardi, G. Paliouras, V. Karkaletsis, C. D. Spyropoulos, “Automatic adaptation of Proper Noun Dictionaries through cooperation of machine learning and probabilistic methods”. In Proceedings of the 23^rd Annual International ACM SIGIR Conference on Research and Development in information Retrieval, July 24 – 28 2000, Athens, Greece.

15. G. Paliouras, V. Karkaletsis, G. Petasis and C. D. Spyropoulos, “Learning Decision Trees for Named-Entity Recognition and Classification”. In Proceedings of the 14^th European Conference on Artificial Intelligence (ECAI 2000), August 20 – 25 2000, Berlin, Germany.

16. G. Petasis, “Machine Learning and Named-Entity Recognition”. Presentation in the 8^th ELSNET European Summer School on Language and Speech Communication on the subject of Text and Speech Triggered Information Access (TeSTIA 2000), Chios, Greece, July 15 – 30 2000.

17. G. Petasis, G. Paliouras, V. Karkaletsis, C.D. Spyropoulos and I. Androutsopoulos, “Resolving Part-of-Speech Ambiguity in the Greek Language Using Learning Techniques”. In Fakotakis, N. et al. (Eds.), Machine Learning in Human Language Technology (Proceedings of the ECCAI Advanced Course on Artificial Intelligence – ACAI ’99), pp. 29-34, July 5 – 16, 1999, Chania, Greece.

18. G. Petasis, “Exploiting Learning in Bilingual Named Entity Recognition”. In Proceedings of the ECCAI Advanced Course on Artificial Intelligence (ACAI ‘99), July 5 – 16, 1999, Chania, Greece.

19. G. Petasis, G. Paliouras, V. Karkaletsis, C. D. Spyropoulos, I. Androutsopoulos, “Using Machine Learning Techniques for Part-Of-Speech Tagging in the Greek Language”. In Proceedings of the 7^th Hellenic Conference on Informatics, August 26 – 29 1999, Ioannina, Greece.

20. V. Karkaletsis, G. Paliouras, G. Petasis, N. Manousopoulou and C. D. Spyropoulos, “Named-Entity Recognition from Greek and English Texts”. Journal of Intelligent and Robotic Systems v. 26, n.2, pp. 123 – 135, 1999.

21. V. Karkaletsis, C. D. Spyropoulos, and G. Petasis, “Named Entity Recognition from Greek texts: the GIE Project”. In “Advances in Intelligent Systems: Concepts, Tools and Applications”, ed. S. Tzafestas, Kluwer Academic Publishers, Part II – Chapter 12, pp. 131 – 142. (Presented at the 3^rd European Robotics Intelligent Systems & Control Conference (EURISCON’98), June 22 – 25 1998, Athens, Greece.)