Conference/Workshop Organizing

• Organizer and General Chair of the CLEF 2023 Conference which will take place at Information Technologies Institute (ITI), Center for Research and Technology Hellas (CERTH), Thessaloniki, Greece.
• Organizer and General Chair of the CLEF 2020 Conference. Held online due to Covid-19.

Editorial Boards

• Editor for the Special Issue "Federated and Transfer Learning Applications", Applied Sciences, 2022. MDPI.
• International Journal on Digital Libraries, Springer.
• Journal on Data Mining & Digital Humanities, EPIsciences.
• International Journal on Advances in Intelligent Systems, IARIA.

Chairing

• The 11th CLEF Conference, CLEF 2020 (held online due to Covid-19). Chair for the Lab Overviews II session.
• The 6th International Conference on Information, Intelligence, Systems and Applications, IISA 2015 (Corfu, Greece). Chair for the the Hybrid Systems in Portfolio Selection session.
• The BCS-IRSG 33rd European Conference on Information Retrieval, ECIR 2011 (Dublin). Chair for the the IR Theory II session.
• The 18th ACM Conference on Information and Knowledge Management, CIKM 2009 (Hong Kong). Chair for the Personalization and Social Search II session.

Member of Programme Commitees

• IEEE CSR Workshop on Data Science for Cyber Security, DS4CS 2022, held online.
• ACM-SIGIR 2022 (Madrid, Spain). [Short Papers PC]
• ACM-SIGIR 2021, held online.
• IEEE CSR Workshop on Data Science for Cyber Security, DS4CS 2021, held online.
• ACM-SIGIR 2020 (Xi'an, China).
• ECIR 2020, held online.
• The 10th International Conference on Web Intelligence, Mining and Semantics, WIMS 2020 (Biarritz, France).
• First Workshop on Privacy in Natural Language Processing, PrivateNLP 2020, colocated with WSDM 2020 (Houston, Texas).
• ACM-SIGIR 2019 (Paris, France).
• ACM-CIKM 2019 (Beijing, China).
• The 9th International Conference on Web Intelligence, Mining and Semantics, WIMS 2019 (Seoul, Korea).
• The First Workshop on Financial Technology and Natural Language Processing, FinNLP 2019 (Macao, China).
• ECIR 2019 (Cologne, Germany).
• CIKM 2018 (Turin, Italy).
• The 40th European Conference on Information Retrieval, ECIR 2018 (Grenoble, France).
• The 8th International Conference on Web Intelligence, Mining and Semantics, WIMS 2018 (Novi Sad, Serbia).
• The 27th International World Wide Web Conference, WWW 2018 (Lyon, France).
• The 41st Annual ACM SIGIR Conference, SIGIR 2018 (Ann Arbor Michigan, USA).
• The 26th ACM Conference on Information and Knowledge Management, CIKM 2017 (Singapore).
• The 39th European Conference on Information Retrieval, ECIR 2017 (Aberdeen, Scotland UK).
• The 40th Annual ACM SIGIR Conference, SIGIR 2017 (Tokyo, Japan).
• The 6th International Conference on Data Science, Technology and Applications, DATA 2017 (Madrid, Spain).
• The 25th ACM Conference on Information and Knowledge Management, CIKM 2016 (Indianapolis, USA).
• The 38th European Conference on Information Retrieval, ECIR 2016 (Padua, Italy).
• The 39th Annual ACM SIGIR Conference, SIGIR 2016 (Pisa, Italy).
• The 38th Annual ACM SIGIR Conference, SIGIR 2015 (Santiago, Chile).
• The 5th International Conference on Advances in Information Mining and Management, IMMM 2015 (Brussels, Belgium). [Technical PC]
• The 37th European Conference on Information Retrieval, ECIR 2015 (Vienna, Austria).
• The 24th ACM Conference on Information and Knowledge Management, CIKM 2015 (Melbourne, Australia).
• The 37th Annual ACM SIGIR Conference, SIGIR 2014 (Gold Coast, Australia).
• The 4th International Conference on Advances in Information Mining and Management, IMMM 2014 (Paris, France). [Technical PC]
• The 36th European Conference on Information Retrieval, ECIR 2014 (Amsterdam).
• The 3nd International Conference on Advances in Information Mining and Management, IMMM 2013 (Lisbon, Portugal). [Technical PC]
• The 6th Information Retrieval Facility (IRF) Conference for Science and Industry, IRFC 2013 (Limassol, Cyprus).
• The 4th International Conference on the Theory of Information Retrieval, ICTIR 2013 (Copenhagen, Denmark). [Posters PC]
• The 13th Dutch-Belgian Information Retrieval Workshop, DIR 2013 (Delft, The Netherlands).
• The 36th Annual ACM SIGIR Conference, SIGIR 2013 (Dublin).
• The BCS-IRSG 35th European Conference on Information Retrieval, ECIR 2013 (Moscow).
• The 2nd International Conference on Advances in Information Mining and Management, IMMM 2012 (Venice, Italy).
• The 35th Annual International ACM SIGIR Conference, SIGIR 2012 (Portland, Oregon).
• The 12th Dutch-Belgian Information Retrieval Workshop, DIR 2012 (Ghent, Belgium).
• The BCS-IRSG 34th European Conference on Information Retrieval, ECIR 2012 (Barcelona).
• The 20th ACM Conference on Information and Knowledge Management, CIKM 2011 (Glasgow). Also, reviewer for Posters.
• The SIGIR 2011 Information Retrieval for E-Discovery Workshop, SIRE 2011 (Beijing).
• The 34th Annual International ACM SIGIR Conference, SIGIR 2011 (Beijing).
• The 11th Dutch-Belgian Information Retrieval Workshop, DIR 2011 (Amsterdam).
• The First International Conference on Advances in Information Mining and Management, IMMM 2011 (Barcelona).
• The BCS-IRSG 33rd European Conference on Information Retrieval, ECIR 2011 (Dublin). [Tutorials PC member]
• The 19th ACM Conference on Information and Knowledge Management, CIKM 2010 (Toronto).
• The 33rd Annual International ACM SIGIR Conference, SIGIR 2010 (Geneva).
• The 18th ACM Conference on Information and Knowledge Management, CIKM 2009 (Hong Kong).
• The BCS-IRSG 26th European Conference on Information Retrieval, ECIR 2004 (Sunderland).
• The 27th Annual International ACM SIGIR Conference, SIGIR 2004 (Sheffield).
• The BCS-IRSG 25th European Conference on Information Retrieval, ECIR 2003 (Pisa).
• The 26th Annual International ACM SIGIR Conference, SIGIR 2003 (Toronto).

Reviews

I refereed articles for all the above events (as a member of their Programme Commitees), as well as for the following journals:

• Information Processing Letters, Elsevier.
  
• Journal on Data Mining & Digital Humanities, EPIsciences.
  
• Transactions on Knowledge and Data Engineering (TKDE), IEEE.
  
• International Journal on Digital Libraries (IJDL), Springer.
  
• Journal of Parallel and Distributed Computing (JPDC), Elsevier.
  
• Transactions on the Web (TWEB), ACM.
  
• Transactions on Information Systems (TOIS), ACM.
  
• World Wide Web, Springer.
  
• Journal of Classification, Springer.
  
• Transactions on Speech and Language Processing, ACM.
• The Computer Journal, Oxford University Press.
• Journal of Machine Learning Research (JMLR), MIT Press.
• Information Processing & Management (IP&M), Elsevier.
• Information Retrieval, Springer.
  

Projects

I have been involved in the following research projects:

• "ILIAD: INTEGRATED DigitaL Framework FOR Comprehensive MARITIME DATA AND INFORMATION SERVICES", EU Horizon 2020, Grant Agreement No 101037643.
  56 international partners, 19 countries, budget €18.9m.
  Started on February 2022, duration: 3 years.
• "EcoScope: Ecocentric management for sustainable fisheries and healthy marine ecosystems", EU Horizon 2020, Grant Agreement No 101000302. 24 international partners, budget €7.9m.
  Started on September 2021, duration 4 years.
• "ODYSSEA: OPERATING A NETWORK OF INTEGRATED OBSERVATORY SYSTEMS IN THE MEDITERRANEAN SEA", Horizon 2020 grant agreement No 727277. 28 international partners, 14 countries, budget €8.4m. Started on 1st June 2017, end date: 30 November 2021.
• "CARRE: Personalized patient empowerment and shared decision support for cardiorenal disease and comorbidities", FP7-ICT-2013-611140, started on 1st November 2013, end date: 31 October 2016.
• “Content-based Image Retrieval Services for Breast Cancer Computer-aided Diagnosis (CBIR-4-CAD)”, a 30-month “Synergasia” project funded by the Greek Ministry of Education, kicked off in January 2013.
• "ATLAS: Advanced Tourism Planning System”, a 24-month “Synergasia” project funded by the Greek Ministry of Education, kicked off in January 2013.
• "SPICE: SPace Internetworking CEnter", FP7-REGPOT-2010-1, Grant Agreement No 264226, kicked off on 1st September 2010.
• "CATCH: Continuous Access to Cultural Heritage", Netherlands Organization for Scientific Research (NWO) project number 640.001.501, 2006-2009.
• "SPIRIT: Spatially-aware Information Retrieval on the Internet", EU-IST Project No. IST-2001-35047, 2003-2005.
• "PROFILE: A Pro-active Information Filter", internally funded by University of Nijmegen, 1996-2000.

Presentations

I personally presented my work in the following venues (thus, presentations by my co-authors are not included in the list):

• Talks in conferences:
  ECIR 2013 (Moscow), IMMM 2012 (Venice), ECIR 2011 (Dublin), ACM-CIKM 2009 (Hong Kong), ICTIR 2009 (Cambridge), ACM-SIGIR 2009 (Boston), ACM-SIGIR 2001 (New Orleans), ECIR 2001 (Darmstadt), RIAO 2000 (Paris), BCS-IRSG 2000 (Cambridge), RIAO 1997 (Montreal)
• Talks in workshops:
  DIR 2001, Infomatiewetenschap 1997 (Eindhoven)
• Poster presentations in workshops & conferences:
  ECIR 2013 (Moscow), ECIR 2011 (Dublin), DIR 2010 (Nijmegen), ACM-SIGIR 2008 (Singapore), DIR 2007 (Leuven)
• Invited talks:
  
  • Qatar Computing Research Institute, QCRI (Doha, Qatar, May 2013)
  • Google Research - EMEA Faculty Summit (Zurich, Feb 2009)
  • Microsoft Research (Cambridge, UK, Dec 2002)
  • TREC 2000 & 2008 conferences @ NIST (after Speaker's proposal)

Teaching

• Search Engines, Master's course at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: full course in 2014-2023 (9 years).
• Information Retrieval & Data Mining, undergraduate course (8th semester) at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: full course in 2010-2013 & 2014-2023 (12 years)
• Databases, undergraduate course (7th semester) at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: full course in 2009-2011 & 2012-2023 (13 years)
• Advanced Databases, undergraduate course (9th semester) at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: full course in 2013-2015 (2 years).
• Database Design, Master's course at Systems Engineering and Management, a joint Postgraduate Program by Democritus University of Thrace and University of Macedonia, Greece: 1/3rd of the course for 2 years, 2014-2016.
• Object-oriented Programming (C++), undergraduate course (2nd semester) at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: full course in 2010-2013 (1/2 of the cource in 2012-2013) & 2015-2023 (11 years).
• Introduction to Computer Science, undergraduate course (1st semester) at the department of Electrical Engineering & Computer Engineering, Democritus University of Thrace, Greece: 1/6th of the course in 2010-2014 (4 years).
• Information Retrieval, Master’s course at the department of Media Studies, Faculty of Humanities, University of Amsterdam: taught significant parts of the course (1/3 to 1/2) for the 3 academic years 2006-2009.
• Internet Distributed E-Commerce Applications, undergraduate course at the department of Computing Science and Informatics, University of Nijmegen, 2002-2003: taught half the lectures.
• Information Retrieval 1 & 2, undergraduate courses at the department of Computing Science and Informatics, University of Nijmegen: teaching support including lectures during the years 1996-2003.

Other Activities

An active member of the SemEval community (2017-2021), ImageCLEF community (2010, 2011, 2016), CLEF eRisk community (2021), as well as the TREC community (2000, 2001, 2007, 2008, 2010, 2013, 2015, 2016, 2020), participating to controlled IR experiments and contributing to the shaping of the tasks.

Trivia

My Erdös number is 3 via the link:

Selected Publications

2022

Exploring Climate Change on Twitter using Seven Aspects: Stance, Sentiment, Aggressiveness, Temperature, Gender, Topics, and Disasters. Dimitrios Effrosynidis, Georgios Sylaios, Avi Arampatzis.
PLOS ONE 17(9): e0274213, September 2022.
Public Library of Science.
DOI | 2021 Impact Factor: 3.752

User Profiling Using Keystroke Dynamics and Rotation Forest.
Ioannis Tsimperidis, Avi Arampatzis.
In: Applications of Machine Learning and Deep Learning for Privacy and Cybersecurity, pages 1-24, 2022.
© IGI Global.
DOI, PDF, BibTeX

The climate change Twitter dataset. Dimitrios Effrosynidis, Alexandros I. Karasakalidis, Georgios Sylaios, Avi Arampatzis.
Expert Systems with Applications, Volume 204, 117541, October 2022.
© Elsevier.
DOI | 2021 Impact Factor: 8.665

Unsupervised consumer intention and sentiment mining from microblogging data as a business intelligence tool.
Symeon Symeonidis, Georgios Peikos, Avi Arampatzis.
Oper Res Int J, May 2022.
© Springer.
DOI | 2021 Impact Factor: 2.708; 5-Year Impact Factor: 2.841

2021

Pseudo relevance feedback optimization.
Avi Arampatzis, Georgios Peikos, Symeon Symeonidis.
Inf Retrieval J, Volume 24, pages 269-297, October 2021.
© Springer.
DOI | 2021 Impact Factor: 2.024; 5-Year Impact Factor: 2.356

Classifying Users Through Keystroke Dynamics.
Ioannis Tsimperidis, Georgios Peikos, Avi Arampatzis.
In: Data Analysis and Rationality in a Complex World, IFCS 2019. Studies in Classification, Data Analysis, and Knowledge Organization. Volume 5, pages 311-319, 2021.
© Springer, Cham.
DOI, BibTeX

An Evaluation of Feature Selection Methods for Environmental Data.
Dimitrios Effrosynidis, Avi Arampatzis.
Ecological Informatics, Volume 61, March 2021.
© Elsevier.
DOI, BibTeX | 2021 Impact Factor: 4.498

What we see in a photograph: content selection for image captioning. Georgios Barlas, Christos Veinidis, Avi Arampatzis.
The Visual Computer, Volume 37, pages 1309-1326, 2021.
© Springer Nature.
DOI, BibTeX | 2021 Impact Factor: 2.835; 5-Year Impact Factor: 2.302

Report on CLEF 2020. Avi Arampatzis, Linda Cappellato, Carsten Eickhoff, Nicola Ferro, Hideo Joho, Evangelos Kanoulas, Christina Lioma, Aurélie Névéol, Theodora Tsikrika, and Stefanos Vrochidis. SIGIR Forum, Volume 54, Number 2, Article 11 (December 2020), 10 pages, 2021.
ACM.
DOI

DUTH at SemEval-2021 Task 7: Is Conventional Machine Learning for Humorous and Offensive Tasks enough in 2021?
Alexandros Karasakalidis, Dimitrios Effrosynidis, Avi Arampatzis.
In: Proceedings of the 15th International Workshop on Semantic Evaluation (SemEval-2021), pp. 1125-1129, online, 2021.
Association for Computational Linguistics.
PDF, BibTeX

Transfer Learning for Automated Responses to the BDI Questionnaire.
Christoforos Spartalis, George Drosatos, Avi Arampatzis.
In: Working Notes of CLEF 2021 - Conference and Labs of the Evaluation forum, pages 1046-1058, Bucharest, Romania, 21-24 September, 2021.
PDF, BibTeX

2020

Species Distribution Modelling via Feature Engineering and Machine Learning for Pelagic Fishes in the Mediterranean Sea.
Dimitrios Effrosynidis, Athanassios Tsikliras, Avi Arampatzis, Georgios Sylaios.
Applied Sciences, 10(24):8900, 13 December 2020.
MDPI.
DOI, PDF, BibTeX | 2021 Impact Factor: 2.838; 5-Year Impact Factor: 2.921

DUTH at SemEval-2020 Task 11: BERT with Entity Mapping for Propaganda Classification. Anastasios Bairaktaris, Symeon Symeonidis, Avi Arampatzis. In: Proceedings of the Fourteenth Workshop on Semantic Evaluation, SemEval@COLING 2020, pp. 1732-1738, Barcelona, December 12-13, 2020.
International Committee for Computational Linguistics.
PDF, BibTeX

Experimental IR Meets Multilinguality, Multimodality, and Interaction - 11th International Conference of the CLEF Association, CLEF 2020, Thessaloniki, Greece, September 22-25, 2020, Proceedings. Avi Arampatzis, Evangelos Kanoulas, Theodora Tsikrika, Stefanos Vrochidis, Hideo Joho, Christina Lioma, Carsten Eickhoff, Aurélie Névéol, Linda Cappellato, Nicola Ferro. Lecture Notes in Computer Science 12260. ISBN 978-3-030-58218-0
© Springer.
DOI, BibTeX

DUTh at TREC 2020 Conversational Assistance Track.
Michalis Fotiadis, Georgios Peikos, Symeon Symeonidis, Avi Arampatzis.
In: Proceedings of The Twenty-Ninth Text REtrieval Conference, TREC 2020, Gaithersburg, Maryland, USA, November 16-20, 2020. National Institute of Standards and Technology (NIST), Special Publication, Volume 1266.
PDF, BibTeX

The Keyboard Knows About You: Revealing User Characteristics via Keystroke Dynamics. Ioannis Tsimperidis, Avi Arampatzis. International Journal of Technoethics, Volume 11, Issue 2, pages 34-51, 2020.
© IGI Global.
DOI, PDF, BibTeX | 2021 CiteScore: 1.4

2019

Language Models and Fusion for Authorship Attribution.
Olga Fourkioti, Symeon Symeonidis, Avi Arampatzis.
Information Processing & Management, 56(6), November 2019.
© Elsevier.
DOI, BibTeX | 2021 Impact Factor: 7.466

Seagrass and hydrographic data for the Mediterranean Sea.
Dimitrios Effrosynidis, Avi Arampatzis, Georgios Sylaios.
Data in Brief, Volume 25, 104286, August 2019.
© Elsevier.
DOI, BibTeX | 2021 CiteScore: 2.4

DUTH at SemEval-2019 Task 8: Part-Of-Speech Features for Question Classification. Anastasios Bairaktaris, Symeon Symeonidis, Avi Arampatzis. In: Proceedings of the 13th International Workshop on Semantic Evaluation, SemEval@ACL 2019, pp. 1155-1159, Minneapolis, Minnesota, USA, June 6–7, 2019.
© Association for Computational Linguistics.
PDF, BibTeX

2018

Seagrass Detection in the Mediterranean: A Supervised Learning Approach.
Dimitrios Effrosynidis, Avi Arampatzis, Georgios Sylaios.
Ecological Informatics, Volume 48, pages 158-170, 2018.
© Elsevier.
DOI, BibTeX | 2021 Impact Factor: 4.498

A Comparative Evaluation of Pre-Processing Techniques and their Interactions for Twitter Sentiment Analysis. Symeon Symeonidis, Dimitrios Effrosynidis, Avi Arampatzis. Expert Systems with Applications, Volume 110, pages 298-310, November 2018.
© Elsevier.
DOI, BibTeX | 2021 Impact Factor: 8.665

Keystroke Dynamics Features for Gender Recognition.
Ioannis Tsimperidis, Avi Arampatzis, Alexandros Karakos.
Digital Investigation, Volume 24, pages 4-10, ISSN 1742-2876, 2018.
© Elsevier.
DOI, BibTeX | 2021 Impact Factor: 2.192

Towards the Creation of an Emotion Lexicon for Microblogging.
Georgios Kalamatianos, Symeon Symeonidis, Dimitrios Mallis, Avi Arampatzis. Journal of Systems and Information Technology, Vol. 20, Issue: 2, pp. 130-151, 2018.
© Emerald Publishing Limited 2018.
DOI, BibTeX | 2021 CiteScore: 3.8

Suggesting Points-of-Interest via Content-Based, Collaborative, and Hybrid Fusion Methods in Mobile Devices. Avi Arampatzis and Georgios Kalamatianos. ACM Transactions on Information Systems (TOIS), Volume 36, Issue 3, Article 23, April 2018.
© ACM.
DOI, BibTeX | 2021 Impact Factor: 4.657

DUTH at SemEval-2018 Task 2: Emoji Prediction in Tweets. Dimitrios Effrosynidis, Georgios Peikos, Symeon Symeonidis, Avi Arampatzis.
In: Proceedings of the 12th International Workshop on Semantic Evaluation, SemEval@ACL 2018, pp. 466-469, New Orleans, Louisiana, June 5-6, 2018.
© Association for Computational Linguistics.
PDF, BibTeX

2017

A Half-Life Decaying Model for Recommender Systems with Matrix Factorization. Panagiotis Ardagelou and Avi Arampatzis. In: Joint Proceedings of the 1st Workshop on Temporal Dynamics in Digital Libraries (TDDL 2017), the (Meta)-Data Quality Workshop (MDQual 2017) and the Workshop on Modeling Societal Future (Futurity 2017) co-located with 21st International Conference on Theory and Practice of Digital Libraries (TPLD 2017), Thessaloniki, Greece, September 21, 2017. CEUR Workshop Proceedings, Volume 2038, CEUR-WS.org
PDF, BibTeX

A Comparative Study of Language Modeling to Instance-Based Methods, and Feature Combinations for Authorship Attribution. Olga Fourkioti, Symeon Symeonidis, Avi Arampatzis. In: Research and Advanced Technology for Digital Libraries - 21st International Conference on Theory and Practice of Digital Libraries , TPDL 2017, pp. 274-286, Thessaloniki, Greece, September 18-21, 2017. LNCS 10450
© Springer
DOI, BibTeX | 24% acceptance rate

A Comparison of Pre-processing Techniques for Twitter Sentiment Analysis. Dimitrios Effrosynidis, Symeon Symeonidis, Avi Arampatzis. In: Research and Advanced Technology for Digital Libraries - 21st International Conference on Theory and Practice of Digital Libraries , TPDL 2017, pp. 394-406, Thessaloniki, Greece, September 18-21, 2017. LNCS 10450
© Springer
DOI, BibTeX

Παράμετροι για τον εντοπισμό φύλου αγνώστων χρηστών του Διαδικτύου.
Ι. Τσιμπερίδης, Α. Αραμπατζής, Α. Καράκος.
9ο Πανελλήνιο Συνέδριο Ανάλυσης Δεδομένων με Διεθνή Συμμετοχή, σελ. 208-215, 28-30 Σεπτεμβρίου, Θεσσαλονίκη, 2017.
PDF

DUTH at SemEval-2017 Task 4: A Voting Classification Approach for Twitter Sentiment Analysis. Symeon Symeonidis, Dimitrios Effrosynidis, John Kordonis, Avi Arampatzis. In: Proceedings of the 11th International Workshop on Semantic Evaluation, SemEval@ACL 2017, pp. 704-708, Vancouver, Canada, August 3-4, 2017.
© Association for Computational Linguistics
DOI, BibTeX

DUTH at SemEval-2017 Task 5: Sentiment Predictability in Financial Microblogging and News Articles. Symeon Symeonidis, John Kordonis, Dimitrios Effrosynidis, Avi Arampatzis. In: Proceedings of the 11th International Workshop on Semantic Evaluation, SemEval@ACL 2017, pp. 861-865, Vancouver, Canada, August 3-4, 2017.
© Association for Computational Linguistics
DOI, BibTeX

2016

Recommending Points-of-Interest via Weighted kNN, Rated Rocchio, and Borda Count Fusion. Georgios Kalamatianos and Avi Arampatzis. In: Proceedings of The Twenty-Fifth Text REtrieval Conference, TREC 2016, Gaithersburg, Maryland, USA, November 15-18, 2016. National Institute of Standards and Technology (NIST), Special Publication 500-321.
PDF, BibTeX

Augmenting Medical Queries with UMLS Concepts via MetaMap. Christopher Agrafiotes and Avi Arampatzis. In: Proceedings of The Twenty-Fifth Text REtrieval Conference, TREC 2016, Gaithersburg, Maryland, USA, November 15-18, 2016. National Institute of Standards and Technology (NIST), Special Publication 500-321.
PDF, BibTeX

Stock Price Forecasting via Sentiment Analysis on Twitter. John Kordonis, Symeon Symeonidis, Avi Arampatzis. In: Proceedings of the 20th Pan-Hellenic Conference on Informatics, PCI 2016, Patras, Greece, November 10-12, 2016. ACM
PDF, BibTeX

A Privacy-by-Design Contextual Suggestion System for Tourism. Pavlos Efraimidis, George Drosatos, Avi Arampatzis, Giorgos Stamatelatos, Ioannis Athanasiadis. Journal of Sensor and Actuator Networks, 2016, 5(2), 10; doi:10.3390/jsan5020010 MDPI
PDF, BibTeX

DUTh at the ImageCLEF 2016 Image Annotation Task: Content Selection. Georgios Barlas, Maria Ntonti, Avi Arampatzis. In: Working Notes of CLEF 2016 - Conference and Labs of the Evaluation forum, pages 279-287, Evora, Portugal, 5-8 September, 2016.
PDF, BibTeX

2015

DUTH at TREC 2015 Clinical Decision Support Track.
George Drosatos, Stefanos Roumeliotis, Avi Arampatzis, Eleni Kaldoudi.
In: Proceedings of the Twenty-Fourth Text REtrieval Conference (TREC 2015), Gaithersburg, Maryland, November 17-20, 2015.
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-319.
PDF, BibTeX

Sentiment Analysis of Greek Tweets and Hashtags using a Sentiment Lexicon. Georgios Kalamatianos, Dimitrios Mallis, Symeon Symeonidis, Avi Arampatzis. In: Proceedings of the 19th Pan-Hellenic Conference on Informatics, PCI 2015, pages 63-68, October 1-3, Athens, Greece, 2015. ACM
PDF, BibTeX

Social Network Analysis of Public Lists of POIs. Ioannis Karagiannis, Pavlos Efraimidis, Georgios Stamatelatos, Avi Arampatzis. In: Proceedings of the 19th Pan-Hellenic Conference on Informatics, PCI 2015, pages 61-62, October 1-3, Athens, Greece, 2015. ACM
PDF, BibTeX

Pythia: A Privacy-enhanced Personalized Contextual Suggestion System for Tourism. George Drosatos, Pavlos Efraimidis, Avi Arampatzis, Giorgos Stamatelatos, Ioannis Athanasiadis. In: Proceedings of the 39th Annual IEEE International Computers, Software & Applications Conference, COMPSAC 2015, pages 822-827, July 1-5, Taichung, Taiwan, 2015. IEEE
PDF, BibTeX

Extracting Intention from Web Queries: Application in eHealth Personalization. George Drosatos, Avi Arampatzis, Eleni Kaldoudi. In: Proceedings of World Congress on Medical Physics & Biomedical Engineering, IUPESM 2015, pages 1435-1438, June 7-12, Toronto, Canada, 2015.
© Springer International Publishing Switzerland
PDF, BibTeX

Versatile Query Scrambling for Private Web Search.
Avi Arampatzis, George Drosatos, Pavlos S. Efraimidis.
Information Retrieval Journal 18(4):331-358 (2015).
DOI: http://link.springer.com/article/10.1007/s10791-015-9256-0
© Springer. BibTeX

2014

Improving Digital Forensics through Data Mining. Chrysoula Tsochataridou, Avi Arampatzis, Vasilios Katos. In: Proceedings of the 4th International Conference on Advances in Information Mining and Management, IMMM 2014, pages 45-52, July 20-24, Paris, France, 2014.
PDF | 31% acceptance rate.

2013

DUTH at TREC 2013 Contextual Suggestion Track.
George Drosatos, Giorgos Stamatelatos, Avi Arampatzis, Pavlos S. Efraimidis.
In: Proceedings of the Twenty-Second Text REtrieval Conference (TREC 2013), Gaithersburg, Maryland, November 19-22, 2013.
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-302.
PDF, BibTeX

A Query Scrambler for Search Privacy on the Internet.
Avi Arampatzis, Pavlos Efraimidis, and George Drosatos.
Information Retrieval, volume 16, issue 6, pages 657-679, December 2013.
© Springer Netherlands.
PDF, BibTeX | 2009 Impact Factor: 1.841

Entity Ranking as a Search Engine Front-End.
Alexandros Komninos and Avi Arampatzis.
International Journal On Advances in Internet Technology, Volume 6, Numbers 1 and 2, pages 68-78, 2013. IARIA.
PDF, BibTeX

A Versatile Tool for Privacy-Enhanced Web Search.
Avi Arampatzis, George Drosatos, and Pavlos Efraimidis.
In: P. Serdyukov et al. (Eds.): ECIR 2013, LNCS 7814, pp. 368–379, 2013.
© Springer-Verlag Berlin Heidelberg 2013
PDF, BibTeX | 191 full-length papers submitted, 55 accepted, about 29% acceptance rate.

On CORI Results Merging. Ilya Markov, Avi Arampatzis, and Fabio Crestani.
In: P. Serdyukov et al. (Eds.): ECIR 2013, LNCS 7814, pp. 753–756, 2013.
© Springer-Verlag Berlin Heidelberg 2013
PDF, BibTeX | 78 short papers submitted, 39 accepted, 50% acceptance rate.

Dynamic two-stage image retrieval from large multimedia databases.
Avi Arampatzis, Konstantinos Zagoris, and Savvas A. Chatzichristofis. Information Processing & Management,
volume 49, number 1, pages 274-285, 2013.
© Elsevier.
PDF, BibTeX | 2010 Impact Factor: 1.783; 5-Year Impact Factor: 2.106

2012

ListCreator: Entity Ranking on the Web. Alexandros Komninos and Avi Arampatzis. In: Proceedings of the 2nd International Conference on Advances in Information Mining and Management, IMMM 2012, pages 141-146, October 21-26, Venice, Italy, 2012.
PDF | 29% acceptance rate.

Unsupervised Linear Score Normalization Revisited. Ilya Markov, Avi Arampatzis, and Fabio Crestani. In: Proceedings of the 35th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2012, August 12-16, Portland, Oregon, 2012.
PDF, BibTeX | 208 posters submitted, 76 accepted, about a 36.5% acceptance rate.

A Fuzzy Rank-Based Late Fusion Method For Image Retrieval.
Savvas Chatzichristofis, Konstantinos Zagoris, Yiannis Boutalis, and Avi Arampatzis. In: K. Schoeffmann et al. (Eds.): MMM 2012, LNCS 7131, pp. 463-472, 2012.
© Springer-Verlag Berlin Heidelberg 2012
PDF, BibTeX

2011

Fast Retrieval from Image Databases via Binary Haar Wavelet Transform on the Color and Edge Directivity Descriptor.
Savvas Chatzichristofis, Yiannis Boutalis, and Avi Arampatzis.
International Journal On Advances in Networks and Services, Volume 4, Numbers 1 and 2, pages 223-231, 2011. IARIA.
PDF, BibTeX

DUTH at ImageCLEF 2011 Wikipedia Retrieval.
Avi Arampatzis, Konstantinos Zagoris, and Savvas A. Chatzichristofis.
In: CLEF (Notebook Papers/LABs/Workshops), 19-22 September, Amsterdam, The Netherlands, 2011.
PDF, BibTeX

Bag-of-Visual-Words vs Global Image Descriptors on Two-Stage Multimodal Retrieval. Konstantinos Zagoris, Savvas Chatzichristofis, and Avi Arampatzis. In: Proceedings of the 34th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2011, July 24-28, Beijing, China, 2011.
PDF, BibTeX | 274 posters submitted, 89 accepted, about a 32.5% acceptance rate.

The TREC Files: the (ground) truth is out there. Savvas Chatzichristofis, Konstantinos Zagoris, and Avi Arampatzis. In: Proceedings of the 34rd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2011, July 24-28, Beijing, China, 2011.
PDF, BibTeX | 35 demos submitted, 15 accepted, about a 42.8% acceptance rate.

Enhancing Deniability against Query-logs.
Avi Arampatzis, Pavlos Efraimidis, and George Drosatos.
In: P. Clough et al. (Eds.): ECIR 2011, LNCS 6611, pp. 117–128, 2011.
© Springer-Verlag Berlin Heidelberg 2011
PDF, BibTeX | Acceptance rate: 45 long papers accepted, about 20% acceptance rate.

Fusion vs Two-Stage for Multimodal Retrieval.
Avi Arampatzis, Konstantinos Zagoris, and Savvas A. Chatzichristofis.
In: P. Clough et al. (Eds.): ECIR 2011, LNCS 6611, pp. 759–762, 2011.
© Springer-Verlag Berlin Heidelberg 2011
PDF, BibTeX | Acceptance rate: 25 posters accepted, about 32% acceptance rate.

Dynamic Two-Stage Image Retrieval from Large Multimodal Databases.
Avi Arampatzis, Konstantinos Zagoris, and Savvas A. Chatzichristofis.
In: P. Clough et al. (Eds.): ECIR 2011, LNCS 6611, pp. 326–337, 2011.
© Springer-Verlag Berlin Heidelberg 2011
PDF, BibTeX | Acceptance rate: 45 long papers accepted, about 20% acceptance rate.

Modeling Score Distributions in Information Retrieval.
Avi Arampatzis and Stephen Robertson.
Information Retrieval, Volume 14, Issue 1, pages 26-46, 2011.
© Springer Netherlands.
PDF, BibTeX | 2009 Impact Factor: 1.841

2010

Investigating the Behavior of Compact Composite Descriptors in Early Fusion, Late Fusion and Distributed Image Retrieval.
Savvas A. Chatzichristofis, Avi Arampatzis, and Yiannis S. Boutalis.
Radioengineering, volume 19, number 4, pages 725-733, December 2010.
PDF | 2010 Impact Factor: 0.503

DUTH does Probabilities of Relevance at the Legal Track.
Dim P. Papadopoulos, Vicky S. Kalogeiton, and Avi Arampatzis.
In: Proceedings of the Nineteenth Text REtrieval Conference (TREC 2010), Gaithersburg, Maryland, November 16-19, 2010.
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-294.
PDF, BibTeX

Multimedia Search with Noisy Modalities: Fusion and Multistage Retrieval.
Avi Arampatzis, Savvas A. Chatzichristofis, and Konstantinos Zagoris.
In: CLEF (Notebook Papers/LABs/Workshops), 22-23 September, Padua, Italy, 2010.
PDF, BibTeX

www.MMRetrieval.net: A Multimodal Search Engine.
Konstantinos Zagoris, Avi Arampatzis, and Savvas A. Chatzichristofis.
In: Proceedings of the 3rd International Conference on SImilarity Search and APplications, SISAP 2010, Istanbul, Turkey, September 18-19, 2010.
© Association for Computing Machinery (ACM).
PDF, BibTeX

Accelerating Image Retrieval using Binary Haar Wavelet Transform on the Color and Edge Directivity Descriptor.
Savvas Α. Chatzichristofis, Yiannis S. Boutalis, and Avi Arampatzis.
In: Proceedings of the Fifth International Multi-Conference on Computing in the Global Information Technology, ICCGI 2010, IEEE Computer Society, 2010.
PDF | Acceptance rate: about a 30% for full papers. BEST PAPERS AWARD!

Late Fusion of Compact Composite Descriptors for Retrieval from Heterogeneous Image Databases. Savvas A. Chatzichristofis and Avi Arampatzis. In: Proceedings of the 33rd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2010, Geneva, Switzerland, July 19-23, 2010.
PDF, BibTeX | 310 posters submitted, 99 accepted, about a 32% acceptance rate.

Simulating signal and noise queries for score normalization in distributed IR.
Avi Arampatzis and Jaap Kamps.
In: Proceedings of the 10th Dutch-Belgian Information Retrieval Workshop (DIR 2010), Radboud University Nijmegen, The Netherlands, March 25, 2010.
Online Proceedings at the DIR-2010 website

An Empirical Study of Query Specificity.
Avi Arampatzis and Jaap Kamps.
In: C. Gurrin et al. (Eds.): ECIR 2010, LNCS 5993, pp. 594–597, 2010.
© Springer-Verlag Berlin Heidelberg 2010
PDF, BibTeX | 68 posters submitted, 23 accepted, about a 34% acceptance rate.

2009

A Signal to Noise Approach to Score Normalization.
Avi Arampatzis and Jaap Kamps.
In: Proceedings of the 18th ACM Conference on Information and Knowledge
Management, CIKM 2009, Hong Kong, China, November 2-6, 2009.
© Association for Computing Machinery (ACM).
PDF, BibTeX | 847 full papers submitted, 123 accepted, about a 14% acceptance rate.

Score Distributions in Information Retrieval.
Avi Arampatzis, Stephen Robertson, and Jaap Kamps.
In: L. Azzopardi et al. (Eds.): ICTIR 2009, LNCS 5766, pp. 139–151, 2009.
© Springer-Verlag Berlin Heidelberg 2009
PDF, BibTeX | Acceptance rate: about a 21% for full papers.

Where to Stop Reading a Ranked List? Threshold Optimization using Truncated Score Distributions.
Avi Arampatzis, Jaap Kamps, and Stephen Robertson.
In: Proceedings of the 32st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2009, Boston, July 19-23, 2009.
© Association for Computing Machinery (ACM).
PDF, BibTeX | 497 full papers submitted, 85 accepted, about a 17% acceptance rate.

2008

A Study of Query Length.
Avi Arampatzis and Jaap Kamps.
In: Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, Singapore, July 20-24, 2008.
PDF, BibTeX, HTML | 173 posters submitted, 91 accepted, about a 53% acceptance rate.

Where to Stop Reading a Ranked List?
Avi Arampatzis and Jaap Kamps.
In: Proceedings of the Seventeenth Text REtrieval Conference (TREC 2008), Gaithersburg, Maryland, November 18-21, 2008.
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-277.
PDF, BibTeX, HTML

2007

The Design and Implementation of SPIRIT: a Spatially-Aware Search Engine for Information Retrieval on the Internet. R. S. Purves, P. Clough, C. B. Jones, A. Arampatzis, B. Bucher, D. Finch, G. Fu, H. Joho, A. K. Syed, S. Vaid, and B. Yang.
International Journal of Geographical Information Science,
Vol. 21, No. 7, January 2007, pp. 717-745.
© Taylor & Francis.
PDF, BibTeX | 2009 Impact Factor: 1.533; Five-Year Impact Factor: 2.303

Unified Access to Heterogeneous Data in Cultural Heritage.
M. Koolen, A. Arampatzis, J. Kamps, V. de Keijzer, N. Nussbaum.
In: Proceedings of the 8th RIAO Conference (Large-Scale Semantic Access to Content - Text, Image, Video and Sound), Pittsburgh, 2007.
PDF, BibTeX | Acceptance rate: about a 33% acceptance rate for posters.

Access to Legal Documents: Exact Match, Best Match, and Combinations.
A. Arampatzis, J. Kamps, M. Koolen, N. Nussbaum.
In: Proceedings of the Sixteenth Text REtrieval Conference (TREC 2007), Gaithersburg, Maryland, November 5-9, 2007.
Department of Commerce, National Institute of Standards and Technology (NIST) Special Publication 500-274.
PDF, BibTeX

Deriving a Domain Specific Test Collection from a Query Log.
A. Arampatzis, J. Kamps, M. Koolen, N. Nussbaum.
In: Proceedings of the ACL 2007 Workshop on Language Technology for Cultural Heritage Data (LaTeCH 2007), Prague, Czech Republic, June 28, 2007.
PDF, BibTeX

MuSeUM: Unified Access to the State of the Art.
A. Arampatzis, J. Kamps, M. Koolen, N. Nussbaum.
In: Proceedings of the 7th Dutch-Belgian Information Retrieval Workshop (DIR 2007), Katholieke Universiteit Leuven, Belgium, 28-29 March, 2007.
PDF

2006

Web-based Delineation of Imprecise Regions.
Avi Arampatzis, Marc J. van Kreveld, Iris Reinbacher, Christopher B. Jones, Subodh Vaid, Paul Clough, Hideo Joho, Mark Sanderson.
Computers, Environment and Urban Systems,
Vol. 30, No. 4. (July 2006), pp. 436-459.
© Elsevier.
PDF, BibTeX | 2010 Impact Factor: 1.147

2005

Multi-dimensional Scattered Ranking Methods for Geographic Information Retrieval. M. van Kreveld, I. Reinbacher, A. Arampatzis, R. van Zwol.
Geoinformatica, volume 9, number 1, pp. 61-84, 2005. ISSN:1384-6175.
© Springer Science & Business Media Inc.
PDF, BibTeX | 2009 Impact Factor: 1.225

2004

Distributed Ranking Methods for Geographic Information Retrieval. M. van Kreveld, I. Reinbacher, A. Arampatzis, R. van Zwol. In: Developments in Spatial Data Handling (11th International Symposium on Spatial Data Handling), Peter Fisher (editor), pages 231-243, Springer, Berlin, 2004.
© Springer-Verlag Berlin Heidelberg
PDF, BibTeX

Web-Based Delineation of Imprecise Regions.
A. Arampatzis et.al.
In: Proceedings of the Workshop on Geographic Information Retrieval, SIGIR 2004, Sheffield, UK: ACM.

Distributed Ranking Methods for Geographic Information Retrieval.
M. van Kreveld, I. Reinbacher, A. Arampatzis, R. van Zwol.
In: 20th European Workshop on Computational Geometry, Seville, Spain, March 2004.

2001

Unbiased S-D Threshold Optimization, Initial Query Degradation, Decay, and Incrementality, for Adaptive Document Filtering. Avi Arampatzis.
In: Proceedings of the Tenth Text REtrieval Conference (TREC-10),
Gaithersburg, Maryland, November, 2001. 
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-250. 
Postscript, PDF

Adaptive and Temporally-dependent Document Filtering,
Ph.D. thesis, University of Nijmegen, The Netherlands, 2001.
ISBN 90-9014891-4
Postscript, PDF

The Score-Distributional Threshold Optimization for Adaptive Binary Classification Tasks.
Avi Arampatzis and Andre van Hameren.
In: Proceedings of the 24th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, New Orleans, September 9-13, 2001.
© Association for Computing Machinery (ACM).
PDF, BibTeX | 201 full papers submitted, 47 accepted, about a 23% acceptance rate.

Document Filtering as an Adaptive and Temporally-dependent Process.
Avi Arampatzis and T.P. van der Weide.
In: Proceedings of BCS-IRSG European Colloquium on IR Research (ECIR01),
Darmstad, Germany, April 4-6, 2001. 
Postscript, PDF

2000

Incrementality, Half-Life, and Threshold Optimization for Adaptive Document Filtering.
Avi Arampatzis, Jean Beney, C.H.A. Koster, Th.P. van der Weide,
Proceedings of the Nineth Text REtrieval Conference (TREC-9),
Gaithersburg, Maryland, November 13-16, 2000. 
Department of Commerce, National Institute of Standards and Technology (NIST), Special Publication 500-249. 
Postscript

Profile - A Multi-Disciplinary Approach to Information Discovery. Joep Simons, Avi Arampatzis, Bernd C.M. Wondergem, Lambert R.B. Schomaker, Theo P. van der Weide, C.H.A. Koster.
In: Proceedings of the Second International Bi-Conference Workshop on Agent-Oriented Information Systems (AOIS-2000), 2000.
PDF, BibTeX

Term Selection for Filtering based on Distribution of Terms over Time. 
Avi Arampatzis, Th.P. van der Weide, C.H.A. Koster, P. van Bommel.
In: Proceedings of RIAO'2000, 12-14 April 2000, Paris.
Postscript, PDF

An Evaluation of Linguistically-motivated Indexing Schemes.
Avi Arampatzis, Th.P. van der Weide, C.H.A. Koster, P. van Bommel.
In: Proceedings of BCS-IRSG 2000 Colloquium on IR Research, 
5th-7th April 2000, Sidney Sussex College, Cambridge, England.
Postscript, HTML, BibTeX

Linguistically-motivated Information Retrieval.
Avi Arampatzis, Th.P. van der Weide, C.H.A. Koster, P. van Bommel.
Encyclopedia of Library and Information Science, 
Volume 69, pages 201-222, 
published by Marcel Dekker, Inc. - New York - Basel, 2000.
PDF (scanned), Postscript, HTML, BibTeX

1999

Text Filtering using Linguistically-motivated Indexing Terms.
Avi Arampatzis, Th.P. van der Weide, C.H.A. Koster, and P. van Bommel. 
Technical Report CSI-R9901, Computing Science Institute, University of Nijmegen, Nijmegen, The Netherlands, January 1999.

1998

Phrase-based Information Retrieval.
Avi Arampatzis, T. Tsoris, C.H.A. Koster, and Th.P. van der Weide. 
Information Processing & Management, 
volume 34, number 6, pages 693-707, December 1998.
© Elsevier.
PDF (please note the typo in the title---corrected in a later erratum), BibTeX
2010 Impact Factor: 1.783; 5-Year Impact Factor: 2.106

1997

IRENA: Information Retrieval Engine based on Natural language Analysis.
Avi Arampatzis, T. Tsoris, C.H.A. Koster.
In: Proceedings of RIAO'97 Computer-Assisted Information Searching on Internet, 
pages 159-175, McGill University, Montreal, Canada, 1997.
PDF, BibTeX

Linguistic Variation in Information Retrieval and Filtering.
Avi Arampatzis, Th.P. van der Weide, P. van Bommel, and C.H.A. Koster.
In: P. M. E. De Bra, editor, Informatiewetenschap 1997, pages 7-10,
Eindhoven University of Technology, Eindhoven, The Netherlands, 1997.

1996

A Linguistic Approach to Information Retrieval. 
Avi Arampatzis, T. Tsoris,
Diploma Thesis, Dept. of Computer Engineering and Informatics, University of Patras, Patras, Greece, 1996.

Undergraduate Student Papers

Συναισθηματική ανάλυση ελληνικών tweets και hashtags με χρήση λεξικού συναισθημάτων. Δημήτριος Μάλλης, Γεώργιος Καλαματιανός, Δημήτριος Νικολαράς, Αυγερινός Αραμπατζής. 8ο Συνέδριο Φοιτητών Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, ΣΦΗΜΜΥ 8, σελ. 56-61, 3-13 Απριλίου, Πανεπιστήμιο Πατρών, Πάτρα, 2015. PDF
Επίβλεψη της εργασίας προπτυχιακού μαθήματος από την οποία προέκυψε η δημοσίευση.

Fractal Animations με MapReduce. Ευαγγελία Παπουτσόγλου, Αριστοτέλης Φαρμάκης, Αυγερινός Αραμπατζής. 8ο Συνέδριο Φοιτητών Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, ΣΦΗΜΜΥ 8, σελ. 129-132, 3-13 Απριλίου, Πανεπιστήμιο Πατρών, Πάτρα, 2015. PDF
Επίβλεψη της εργασίας προπτυχιακού μαθήματος από την οποία προέκυψε η δημοσίευση.

Improving digital forensics through data mining.
Chrysoula Tsochataridou, Avi Arampatzis, Vasilios Katos.
Proceedings of the 7th Electrical and Computer Engineering Student Conference (ECESCON 7), pages 71-76, 11-13 April, Aristotle University of Thessaloniki, Thessaloniki, Greece, 2014.
PDF

A Cost-Benefit Analysis of Indexing Big Data with Map-Reduce.
Dimitrios Siafarikas, Argyrios Samourkasidis, Avi Arampatzis.
Proceedings of the 7th Electrical and Computer Engineering Student Conference (ECESCON 7), pages 165-170, 11-13 April, Aristotle University of Thessaloniki, Thessaloniki, Greece, 2014.
PDF

ListCreator: Κατάταξη Οντοτήτων στο ∆ιαδίκτυο. Αλέξανδρος Κομνηνός και Αυγερινός Αραμπατζής. 5ο Συνέδριο Φοιτητών Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, ΣΦΗΜΜΥ 5, 6-7 Απριλίου, Δημοκρίτειο Πανεπιστήμιο Θράκης, Ξάνθη, 2012.
PDF (in Greek)

Resources

SIGIR's mailing-list

SIGIR's Paper Acceptance Statistics

Apache's Lucene

The Lemur Toolkit

van Rijsbergen's classic, Information Retrieval

TREC's proceedings

SMART's ftp directory

Other

Interested in my past and current other activities? Check out:

Listen to my music on Spotify, YouTube, and elsewhere.
I produce mainly psychedelic dance (but not only) music in my free time.

http://www.djavi.com/
Still DJing sometimes---no website updates though.