Efstathios Stamatatos

Associate Professor
Dept. of Information and Communication Systems Engineering
University of the Aegean
83200 - Karlovassi, Samos, Greece
Tel. +30-22730-82260


GREEK


 Contents: [ Courses | Short CV | Projects | Publications | Activities]

 My profile in: [ Google Scholar | DBLP | Academic Search | ResearcherID ]

 Research interests: [ Text mining, Intelligent information retrieval, Natural language processing, Machine learning, Computer music ]
 

 

Recent Activities:
 

  • Author clustering task at at PAN-2017 (in preparation)
    help in conjunction with CLEF-2017, 11-14 September 2017, Dublin, Ireland.
  • "Who Wrote the Web?": Summer academy of the German National Academic Foundation
    20 Sept. - 3 Oct. 2015, La-Colle-sur-Loup, France.
    Paper in Proc. of the 38th European Conference on Information Retrieval (ECIR-2016).
    Code of 14 re-implemented authorship attribution approaches.

 

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 Courses

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 Short CV
 
Efstathios Stamatatos received the diploma degree in electrical engineering (1994) and the doctoral degree in electrical and computer engineering (2000), both from the University of Patras, Greece. He was a research associate of the Wire Communications Lab. of the University of Patras from 1995 to 2003. He also joined the Polytechnic University of Madrid (1998) as a visiting researcher, the Austrian Research Institute for Artificial Intelligence as a post-doc researcher (2001-2002), and the TEI of Ionian Islands as an adjunct professor (2002-2004). Since 2004 he is a faculty member of the Dept. of Information and Communication Systems Engineering, University of the Aegean.
   

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 Recent Projects
 
  • WIQ-EI (FP7-PEOPLE-2010-IRSES): Web Information Quality Evaluation Initiative
 

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 Publications
 

[ Google Scholar | DBLP | Mendeley | Academic Search | ResearcherID ]

 
 
Dissertations:
 
  • Statistical Identification of Genre and Author in Unrestricted Modern Greek Text
    University of Patras (PDF in Greek)
 
Journals:
 
  • A. Rocha, W.J. Scheirer, C.W. Forstall, T. Cavalcante, A. Theophilo, B. Shen, A.R.B. Carvalho, and E. Stamatatos
    Authorship Attribution for Social Media Forensics
    IEEE Transactions on Information Forensics and Security, Article number 7555393, IEEE, 2016. (DOI)
  • A. Pastor López-Monroy, M. Montes-y-Gómez, H.J. Escalante, L. Villaseñor-Pineda, E. Stamatatos
    Discriminative Subprofile-Specific Representations for Author Profiling in Social Media
    Knowledge-Based Systems, 89, pp. 134–147, Elsevier, 2015. (DOI)
  • Sidorov, G., F. Velasquez, E.Stamatatos, A. Gelbukh, and L. Chanona-Hernández
    Syntactic N-grams as Machine Learning Features for Natural Language Processing

    Expert Systems with Applications
    , 41(3), pp. 853-860, Elsevier, 2014. (DOI)
  • Stamatatos, E.
    On the Robustness of Authorship Attribution Based on Character n-gram Features

    Journal of Law and Policy
    , 21(2), pp. 421-439, Brooklyn Law School, 2013. (PDF)
  • Stamatatos, E.
    Plagiarism Detection Using Stopword n-grams
    Journal of the American Society for Information Science and Technology
    , 62(12), pp. 2512-2527, Wiley, 2011. (DOI, PDF preprint)
  • Kanaris, I. and E. Stamatatos
    Learning to Recognize Webpage Genres
    Information Processing and Management, 45(5), pp. 499-512, Elsevier, 2009. (DOI, PDF preprint)
  • Stamatatos, E.
    A Survey of Modern Authorship Attribution Methods
    Journal of the American Society for Information Science and Technology, 60(3), pp. 538-556, 2009, Wiley. (DOI, PDF preprint
  • Stamatatos, E.
    Author Identification: Using Text Sampling to Handle the Class Imbalance Problem
    Information Processing and Management, 44(2), pp. 790-799, Elsevier, 2008. (DOI, PDF preprint)
  • Frantzeskou, G., S. MacDonell, E. Stamatatos, and S. Gritzalis
    Examining the Significance of High-level Programming Features in Source Code Author Classification
    The Journal of Systems and Software, 81(3), pp.447-460, Elsevier, 2008. (DOI, PDF)
  • Kanaris, I., K. Kanaris, I. Houvardas, and E. Stamatatos
    Words vs. Character N-grams for Anti-spam Filtering
    Int. Journal on Artificial Intelligence Tools, World Scientific, 16(6), pp. 1047-1067, 2007. (PDF)
  • Frantzeskou, G., E. Stamatatos, S. Gritzalis, C.E. Chaski, and B.S. Howald
    Identifying Authorship by Byte-Level N-Grams: The Source Code Author Profile (SCAP) Method
    Int. Journal of Digital Evidence, 6(1), 2007. (PDF)
  • Stamatatos, E.
    Authorship Attribution Based on Feature Set Subspacing Ensembles
    Int. Journal on Artificial Intelligence Tools, 15(5), pp. 823-838, World Scientific, 2006 (PDF)
  • Stamatatos, E. and G. Widmer
    Automatic Identification of Music Performers with Learning Ensembles
    Artificial Intelligence
    , 165(1), pp. 37-56, Elsevier, 2005. (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis.
    Computer-Based Authorship Attribution without Lexical Measures
    Computers and the Humanities, 35(2), pp. 193-214, Kluwer, 2001. (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis.
    Automatic Text Categorization in Terms of Genre and Author
    Computational Linguistics, 26(4), pp. 461-485, MIT Press, 2000. (PDF)
  • Michos, S., E. Stamatatos, and N. Fakotakis.
    Supporting Multilinguality in Library Automation Systems Using AI Tools
    Applied Artificial Intelligence, 13(7), pp. 679-704, Taylor & Francis, 1999. (PDF)
 
Conferences and chapters in books:
 
  • Stamatatos, E.
    Universality of Stylistic Traits in Texts
    In M. Degli Esposti, G. E. Altmann, and F. Pachet (eds.), Creativity and Universality in Language, Lecture Notes in Morphogenesis, pp. 143-155, Springer, 2016. (DOI, PDF preprint)
  • Rosso, P., F.M. Rangel Pardo, M. Potthast, E. Stamatatos, M. Tschuggnall, and B. Stein
    Overview of PAN'16 - New Challenges for Authorship Analysis: Cross-Genre Profiling, Clustering, Diarization, and Obfuscation
    In Experimental IR Meets Multilinguality, Multimodality, and Interaction - Proceedings of the 7th International Conference of the CLEF Association (CLEF 2016), LNCS 9822, pp. 332-350, Springer, 2016. (PDF)
  • Stamatatos, E., M. Tschuggnall, B. Verhoeven, W. Daelemans, G. Specht, B. Stein, and M. Potthast
    Clustering by Authorship Within and Across Documents
    Working Notes of CLEF 2016, pp. 691-715, CEUR-WS, 2016. (PDF)
  • Potthast, M., S. Braun, T. Buz, F. Duffhauss, F. Friedrich, J.M. Gülzow, J. Köhler, W. Lötzsch, F. Müller, M.E. Müller, R. Paßmann, B. Reinke, L. Rettenmeier, T. Rometsch, T. Sommer, M. Träger, S. Wilhelm, B. Stein, E. Stamatatos, and M. Hagen
    Who Wrote the Web? Revisiting Influential Author Identification Research Applicable to Information Retrieval
    Advances in Information Retrieval - Proc. of the 38th European Conference on IR Research (ECIR 2016), LNCS 9626, pp. 393-407, Springer, 2016. (PDF)
  • Stamatatos, E., M. Potthast, F. Rangel, P. Rosso, and B. Stein
    Overview of the PAN/CLEF 2015 Evaluation Lab
    In Proceedings of the 6th International Conference of the CLEF Association (CLEF-2015), Springer LNCS 9283, Springer, pp. 518-538, 2015. (PDF)
  • Pritsos, D. and E. Stamatatos
    The Impact of Noise in Web Genre Identification
    In Proceedings of the 6th International Conference of the CLEF Association (CLEF-2015), Springer LNCS 9283, pp. 268-273, 2015. (PDF)
  • Stamatatos, E., W. Daelemans, B. Verhoeven, P. Juola, A. López López, M. Potthast, and B. Stein
    Overview of the Author Identification Task at PAN 2015
    In L. Cappellato, N. Ferro, J. Gareth, E. San Juan (eds.) Working Notes Papers of the CLEF 2015 Evaluation Labs, 2015. (PDF)
  • Potthast, M., T. Gollub, F. M. Rangel Pardo, P. Rosso, E. Stamatatos, and B. Stein
    Improving the Reproducibility of PAN's Shared Tasks: Plagiarism Detection, Author Identification, and Author Profiling
    In Proceedings of the 5th International Conference of the CLEF Initiative, LNCS, 8685, pp. 268-299, Springer, 2014. (PDF)
  • Stamatatos, E. W. Daelemans, B. Verhoeven, B. Stein, M. Potthast, P. Juola, M.A. Sánchez-Pérez, and A. Barrón-Cedeño
    Overview of the Author Identification Task at PAN 2014
    In L. Cappellato, N. Ferro, M. Halvey, and W. Kraaij (Eds.) Working Notes for CLEF 2014 Conference, pp. 877-897, 2014. (PDF)
  • Potha, N. and E. Stamatatos
    A Profile-based Method for Authorship Verification
    In Proc. of the 8th Hellenic Conference on Artificial Intelligence (SETN), LNCS, 8445, pp. 313-326, 2014. (PDF)
  • Vijay Sundar Ram R., E. Stamatatos, and Sobha Lalitha Devi
    Identification of Plagiarism Using Syntactic and Semantic Filters
    In Proceedings of the 15th International Conference on Computational Linguistics and Intelligent Text Processing (CICLing), Part II, LNCS 8404, pp. 495-506, Springer, 2014. (PDF)
  • Gollub, T., M. Potthast, A. Beyer, M. Busse, F. Rangel, P. Rosso, E. Stamatatos, and B. Stein
    Recent Trends in Digital Text Forensics and its Evaluation: Plagiarism Detection, Author Identification, and Author Profiling
    In Proc. of the 4th Int. Conf. of the CLEF Intiative: Information Access Evaluation. Multilinguality, Multimodality, and Visualization
    Springer LNCS, 8138, pp. 282-301, 2013. (PDF)
  • Juola P. and E. Stamatatos
    Overview of the Author Identification Task at PAN 2013
    In P. Forner, R. Navigli, and D. Tufis (eds) CLEF 2013 Evaluation Labs and Workshop –Working Notes Papers, 2013. (PDF)
  • Rangel, F., P. Rosso, M. Koppel, E. Stamatatos, and G. Inches
    Overview of the Author Profiling Task at PAN 2013
    In P. Forner, R. Navigli, and D. Tufis (eds) CLEF 2013 Evaluation Labs and Workshop –Working Notes Papers, 2013. (PDF)
  • Potthast, M., M. Hagen, T. Gollub, M. Tippmann, J. Kiesel, P. Rosso, E. Stamatatos, and B. Stein
    Overview of the 5th International Competition on Plagiarism Detection
    In P. Forner, R. Navigli, and D. Tufis (eds) CLEF 2013 Evaluation Labs and Workshop –Working Notes Papers, 2013. (PDF)
  • Prokopiou, K., E. Kavallieratou, and E. Stamatatos
    An Image Processing Self-training System for Ruling Line Removal Algorithms
    In Proc. of the 18th Int. Conf. on Digital Signal Processing (DSP), IEEE, 2013. (PDF)
  • D.A. Pritsos and E. Stamatatos
    Open-Set Classification for Automated Genre Identification
    In Proc. of the 35th European Conference on IR Research (ECIR-2013), Springer LNCS, 7814, pp. 207-217, 2013. (PDF)
  • Pappas, N., G. Katsimpras, and E. Stamatatos
    Distinguishing the Popularity between Topics: A System for Up-to-Date Opinion Retrieval and Mining in the Web
    In Proc. of the 14th International Conference on Computational Linguistics and Intelligent Text Processing (CICLing-2013), Springer LNCS, 7817, pp. 197-209, 2013. (PDF)
  • Sidorov, G., F. Velasquez, E. Stamatatos, A.F. Gelbukh, and L. Chanona-Hernández
    Syntactic Dependency-Based n-grams: More Evidence of Usefulness in Classification
    In Proc. of the 14th International Conference on Computational Linguistics and Intelligent Text Processing (CICLing-2013), Springer LNCS, 7817, pp. 13-24, 2013. (PDF)
  • Sidorov, G., F. Velasquez, E.Stamatatos, A.F. Gelbukh, and L. Chanona-Hernández
    Syntactic Dependency-Based n-grams as Classification Features

    In Proc. of the 11th Mexican International Conference on Artificial Intelligence (MICAI-2012), Springer LNCS, 7630, pp. 1-11, 2013. (PDF)
  • Chatzicharalampous, E., G. Frantzeskou, and E. Stamatatos
    Author Identification in Imbalanced Sets of Source Code Samples
    In Proc. of the IEEE 24th International Conference on Tools with Artificial Intelligence (ICTAI-2012), pp. 790-797, 2012. (PDF)
  • Pappas, N., G. Katsimpras, and E. Stamatatos
    An Agent-Based Focused Crawling Framework for Topic- and Genre-Related Web Document Discovery
    In Proc. of the IEEE 24th International Conference on Tools with Artificial Intelligence (ICTAI-2012), pp. 508-515, 2012. (PDF)

  • Pappas, N., G. Katsimpras, and E. Stamatatos
    Extracting Informative Textual Parts from Web Pages Containing User-generated Content
    In Proc. of the 12th International Conference on Knowledge Management and Knowledge Technologies (I-KNOW-12), Paper 4, 2012. (PDF)
  • Stamatatos, E.
    Plagiarism Detection Based on Structural Information
    In Proc. of the 20th ACM Conference on Information and Knowledge Management (CIKM-11), pp. 1221-1230, 2011. (PDF)
  • Kourtis, I and E. Stamatatos
    Author Identification Using Semi-supervised Learning
    In Proc. of the 5th Int. Workshop on Uncovering Plagiarism, Authorship, and Social Software Misuse (PAN-11), 2011. (PDF)
  • Stamatatos, E.
    Intrinsic Plagiarism Detection Using Character n-gram Profiles
    In Proc. of the 3rd Int. Workshop on Uncovering Plagiarism, Authorship, and Social Software Misuse, 2009. (PDF)
  • Stamatatos, E and K. Stergiou
    Learning How to Propagate Using Random Probing
    In Proc. of the 6th Int. Conf. on Integration of Artificial Intelligence and Operations Research techniques in Constraint Programming for Combinatorial Optimization Problems (CPAIOR’09), 2009. (PDF)
  • Plakias, S. and E. Stamatatos
    Author Identification Using a Tensor Space Representation
    In Proc. of the 18th European Conference on Artificial Intelligence (ECAI'08), pp. 833-834, 2008 (PDF)
  • Plakias, S. and E. Stamatatos
    Tensor Space Models for Authorship Identification
    In Proc. of the 5th Hellenic Conference on Artificial Intelligence (SETN'08), pp. 239-249, 2008 (PDF)
  • Kanaris, I. and E. Stamatatos
    Webpage Genre Identification Using Variable-length Character n-grams
    In Proc. of the 19th IEEE Int. Conf. on Tools with Artificial Intelligence (ICTAI'07), 2007 (PDF)
  • Stamatatos, E.
    Author Identification Using Imbalanced and Limited Training Texts
    In Proc. of the 4th International Workshop on Text-based Information Retrieval, 2007 (PDF)
  • Houvardas, J. and E. Stamatatos
    N-gram Feature Selection for Authorship Identification
    In J. Euzenat, and J. Domingue (Eds.) Proc. of the 12th Int. Conf. on Artificial Intelligence: Methodology, Systems, Applications (AIMSA'06), LNCS 4183, pp. 77-86, 2006 (PDF)
  • Stamatatos, E.
    Ensemble-based Author Identification Using Character N-grams
    In Proc. of the 3rd Int. Workshop on Text-based Information Retrieval (TIR'06),
    pp. 41-46, 2006. (PDF)
  • Stamatatos, E.
    Text Sampling and Re-Sampling for Imbalanced Author Identification Cases
    In Proc. of the 17th European Conference on Artificial Intelligence (ECAI'06), 2006, (PDF)
  • Kanaris, I., K. Kanaris, and E. Stamatatos
    Spam Detection Using Character N-grams
    In  G. Antoniou, G. Potamias, C. Spyropoulos, D. Plexousakis (Eds): Advances in Artificial Intelligence: Proceedings  of the 4th Hellenic Conference on AI (SETN 2006),
    Springer
    LNCS, 3955, pp. 95–104, 2006. (PDF)
  • Kavallieratou, E. and E. Stamatatos
    Adaptive Binarization of Historical Document Images
    In Proc. of the 18th Int. Conf. on Pattern Recognition, pp. 742-745.
  • Kavallieratou, E. and E. Stamatatos
    Improving the Quality of Degraded Document Images
    In Proc. of 2nd IEEE Int. Conf. on Document Image Analysis for Libraries (DIAL'06),
    pp.340-349, 2006. (PDF)
  • Frantzeskou, G., E. Stamatatos, S. Gritzalis, and S. Katsikas
    Effective Identification of Source Code Authors Using Byte-level Information
    In Proc. of 28th Int. Conf. on Software Engineering (ICSE'06), 2006. (PDF)
  • Frantzeskou, G., E. Stamatatos, S. Gritzalis, and S. Katsikas
    Source Code Author Identification Based on N-gram Author Profiles
    In Proc. of 3rd IFIP Conference on Artificial Intelligence Applications & Innovations (AIAI'06), 2006, pp. 508-515. (PDF)
  • Frantzeskou, G., E. Stamatatos, and S. Gritzalis
    Supporting the Cybercrime Investigation Process: Effective Discrimination of Source Code Authors Based on Byte-level Information
    In Proc. of 2nd Int. Conf. on E-Business and Telecommunication Networks, 2005. (PDF)
  • Stamatatos, E. and E. Kavallieratou
    Music Performer Verification Based on Learning Ensembles
    In G. Vouros (Ed.)
    Methods and Applications of Artificial Intelligence
    Lecture Notes in Computer Science, 3025, pp. 122 – 131, 2004. (PDF)
  • Kavallieratou E. and E. Stamatatos
    Discrimination of Machine-Printed from Handwritten Text Using Simple Structural Characteristics
    In Proc. of the 17th International Conference on Pattern Recognition (ICPR 2004)
    Volume 1., 2004. (PDF)
  • Stamatatos, E. and G. Widmer
    Music Performer Recognition Using an Ensemble of Simple Classifiers
    In Proc. of the 15th European Conference on Artificial Intelligence (ECAI’02)
    pp. 335-339, 2002. (PDF)
  • Stamatatos, E.
    Quantifying the Differences Between Music Performers: Score vs. Norm.
    In Proc. of the International Computer Music Conference (ICMC’02)
    pp. 376-382, 2002. (PDF)
  • Stamatatos, E.
    A Computational Model for Discriminating Music Performers
    In Proc. of the MOSART Workshop on Current Research Directions in Computer Music
    pp. 65-69, 2001. (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis
    A Practical Chunker for Unrestricted Text
    In D. Christodoulakis (Ed.) Natural Language Processing
    Lecture Notes on Computer Science, 1835, pp.
    139-150, 2000.
    (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis
    Text Genre Detection Using Common Word Frequencies
    In Proc. of the 18th Int. Conf. on Computational Linguistics (COLING2000)
    pp. 808-814, 2000. (PDF)
  • Kavallieratou Å., E. Stamatatos, N. Fakotakis, and G. Kokkinakis
    Handwritten Character Segmentation Using Transformation-Based Learning
    In Proc. of the 15th Int. Conf. on Pattern Recognition (ICPR2000)
    pp. 634-637, 2000. (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis
    Automatic Authorship Attribution
    In Proc. of the 9th Conf. ïf the European Chapter of the Association for Computational Linguistics (EACL’99)
    pp. 158-164, 1999. (PDF)
  • Stamatatos, E., N. Fakotakis, and G. Kokkinakis
    Automatic Extraction of Rules for Sentence Boundary Disambiguation
    In Proc. of the Workshop in Machine Learning in Human Language Technology, Advance Course on Artificial Intelligence (ACAI’99)
    pp. 88-92, 1999. (PDF)
  • Stamatatos, E., S. Michos, N. Fakotakis, and G. Kokkinakis
    A User-Assisted Business Letter Generetor Dealing with Text’s Stylistic Variations
    In Proc. of the 9th IEEE Conference on Tools with Artificial Intelligence (ICTAI’97)
    pp. 182-189, 1997. (PDF)
  • Stamatatos, E., S. Michos, C. Patelodimou, and N. Fakotakis
    TRANSLIB: An Advanced Tool for Supporting Multilingual Access to Library Catalogues
    In Proc. of the 2nd Workshop on Multilinguality in Software Industry (MULSAIC’97)
    pp. 33-40, 1997.
    (PDF)
  • Michos S., E. Stamatatos, N. Fakotakis, and G. Kokkinakis
    Categorising Texts by Using a Three-Level Functional Style Description
    In A. Ramsay (ed.) Artificial Intelligence: Methodology, Systems, Applications
    Frontiers in Artificial Intelligence and Applications
    , 35, IOS press, pp
    . 191-198, 1996. (PDF)
  • Michos S., E. Stamatatos, N. Fakotakis, and G. Kokkinakis
    An Empirical Text Categorizing Computational Model Based on Stylistic Aspects
    In Proc. of the 8th IEEE Conference on Tools with Artificial Intelligence (ICTAI’96)
    pp. 71-77, 1996. (PDF)
 

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 Activities

Associate Editor:

Edirotial Board Member

Guest Editor:

PC Member (recent):
  • 19th International Conference on Speech and Computer (SPECOM 2017)
  • 15th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2017)
  • 15th Mexican International Conference on Artificial Intelligence (MICAI 2016)
  • 8th Annual Meeting of Forum for Information Retrieval Evaluation (FIRE 2016)
  • 20th Panhellenic Conference on Informatics (PCI-2016)
  • 7th International Conference of the CLEF Initiative (CLEF 2016)
  • 13th Workshop on Text-Based Information Retrieval (TIR-2016)
  • 4th International Conference on Statistical Language and Speech Processing (SLSP 2016)
  • 17th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing 2016)
  • International Conference on Big Data Analytics, Data Mining and Computational Intelligence (BigDaCI 2016)
  • 10th International Conference on Language Resources and Evaluation (LREC 2016)
  • 9th Hellenic Conference on Artificial Intelligence (SETN 2016)
  • 14th Mexican International Conference on Artificial Intelligence (MICAI 2015)
  • 3rd International Conference on Statistical Language and Speech Processing (SLSP 2015)
  • 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing -- System Demonstrations (ACL-IJCNLP 2015)
  • 7th Forum for Information Retrieval Evaluation Workshop (FIRE 2015)
  • 12th Workshop on Text-Based Information Retrieval (TIR-2015)
  • 6th International Conference of the CLEF Initiative (CLEF 2015)
  • 16th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing 2015)
  • 19th Panhellenic Conference on Informatics (PCI 2015)
  • 24th International Joint Conference on Artificial Intelligence (IJCAI 2015)
  • 9th IADIS International Conference on Intelligent Systems and Agents (ISA 2015)

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