George Kokkinakis

Also published as: G. Kokkinakis, George K. Kokkinakis


2004

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A Bayesian Model for Shallow Syntactic Parsing of Natural Language Texts
Manolis Maragoudakis | Nikos Fakotakis | George Kokkinakis
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

For the present work, we introduce and evaluate a novel Bayesian syntactic shallow parser that is able to perform robust detection of pairs of subject-object and subject-direct object-indirect object for a given verb, in a natural language sentence. The shallow parser infers on the correct subject-object pairs based on knowledge provided by Bayesian network learning from annotated text corpora. The DELOS corpus, a collection of economic domain texts that has been automatically annotated using various morphological and syntactic tools was used as training material. Our shallow parser makes use of limited linguistic input. More specifically, we consider only part of speech tagging, the voice and the mood of the verb as well as the head word of a noun phrase. For the task of detecting the head word of a phrase we used a sentence boundary detector. Identifying the head word of a noun phrase, i.e. the word that holds the morphological information (case, number) of the whole phrase, also proves to be very helpful for our task as its morphological tag is all the information that is needed regarding the phrase. The evaluation of the proposed method was performed against three other machine learning techniques, namely naive Bayes, k-Nearest Neighbor and Support Vector Machines, methods that have been previously applied to natural language processing tasks with satisfactory results. The experimental outcomes portray a satisfactory performance of our proposed shallow parser, which reaches almost 92 per cent in terms of precision.

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Learning to Predict Pitch Accents Using Bayesian Belief Networks for Greek Language
Panagiotis Zervas | Manolis Maragoudakis | Nikos Fakotakis | George Kokkinakis
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

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A graphical Tool for Handling Rule Grammars in Java Speech Grammar Format
Kallirroi Georgila | Nikos Fakotakis | George Kokkinakis
Proceedings of the Fourth International Conference on Language Resources and Evaluation (LREC’04)

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Learning Greek Verb Complements: Addressing the Class Imbalance
Katia Kermanidis | Manolis Maragoudakis | Nikos Fakotakis | George Kokkinakis
COLING 2004: Proceedings of the 20th International Conference on Computational Linguistics

2003

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Text Tokenization for Knowledge-free Automatic Extraction of Lexical Similarities
Aristomenis Thanopoulos | Nikos Fakotakis | George Kokkinakis
Actes de la 10ème conférence sur le Traitement Automatique des Langues Naturelles. Posters

Previous studies on automatic extraction of lexical similarities have considered as semantic unit of text the word. However, the theory of contextual lexical semantics implies that larger segments of text, namely non-compositional multiwords, are more appropriate for this role. We experimentally tested the applicability of this notion applying automatic collocation extraction to identify and merge such multiwords prior to the similarity estimation process. Employing an automatic WordNet-based comparative evaluation scheme along with a manual evaluation procedure, we ascertain improvement of the extracted similarity relations.

2002

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Combining Bayesian and Support Vector Machines Learning to automatically complete Syntactical Information for HPSG-like Formalisms
Manolis Maragoudakis | Katia Kermanidis | Nikos Fakotakis | George Kokkinakis
Proceedings of the Third International Conference on Language Resources and Evaluation (LREC’02)

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Comparative Evaluation of Collocation Extraction Metrics
Aristomenis Thanopoulos | Nikos Fakotakis | George Kokkinakis
Proceedings of the Third International Conference on Language Resources and Evaluation (LREC’02)

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DELOS: An Automatically Tagged Economic Corpus for Modern Greek
Katia Lida Kermanidis | Nikos Fakotakis | George Kokkinakis
Proceedings of the Third International Conference on Language Resources and Evaluation (LREC’02)

2001

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Incremental Construction of Compact Acyclic NFAs
Kyriakos N. Sgarbas | Nikos D. Fakotakis | George K. Kokkinakis
Proceedings of the 39th Annual Meeting of the Association for Computational Linguistics

2000

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GRUHD: A Greek database of Unconstrained Handwriting
E. Kavallieratou | N. Liolios | E. Koutsogeorgos | N. Fakotakis | G. Kokkinakis
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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Automatic Extraction of Semantic Similarity of Words from Raw Technical Texts
Aristomenis Thanopoulos | Nikos Fakotakis | George Kokkinakis
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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A Graphical Parametric Language-Independent Tool for the Annotation of Speech Corpora
Kallirroi Georgila | Nikos Fakotakis | George Kokkinakis
Proceedings of the Second International Conference on Language Resources and Evaluation (LREC’00)

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Text Genre Detection Using Common Word Frequencies
E. Stamatatos | N. Fakotakis | G. Kokkinakis
COLING 2000 Volume 2: The 18th International Conference on Computational Linguistics

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Automatic Extraction of Semantic Relations from Specialized Corpora
Aristomenis Thanopoulos | Nikos Fakotakis | George Kokkinakis
COLING 2000 Volume 2: The 18th International Conference on Computational Linguistics

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Automatic Text Categorization In Terms Of Genre and Author
Efstathios Stamatatos | Nikos Fakotakis | George Kokkinakis
Computational Linguistics, Volume 26, Number 4, December 2000

1999

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Automatic Authorship Attribution
E. Stamatatos | N. Fakotakis | G. Kokkinakis
Ninth Conference of the European Chapter of the Association for Computational Linguistics

1996

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Efficient Multilingual Phoneme-to-Grapheme Conversion Based on HMM
Panagiotis A. Rentzepopoulos | George K. Kokkinakis
Computational Linguistics, Volume 22, Number 3, September 1996

1995

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Automatic Stochastic Tagging of Natural Language Texts
Evangelos Dermatas | George Kokkinakis
Computational Linguistics, Volume 21, Number 2, June 1995