Theodora Tsikrika

Publications

2016

George Kalpakis, Theodora Tsikrika, Neil Cunningham, Christos Iliou, Stefanos Vrochidis, Jonathan Middleton, and Ioannis Kompatsiaris. OSINT and the Dark Web. In "Open Source Intelligence Investigation - From Strategy to Implementation", B. Akhgar, P. S. Bayerl, F. Sampson (Eds.), Springer, 2016.

Theodora Tsikrika and Yannis Manolopoulos. A Retrospective Study on the 20 Years of the ADBIS Conference. In Proceedings of the 20th East-European Conference on Advances in Databases and Information Systems (ADBIS 2016), August 28-31, Prague, Czech Republic, 2016.

Christos Iliou, George Kalpakis, Theodora Tsikrika, Stefanos Vrochidis, Ioannis Kompatsiaris. Hybrid Focused Crawling for Homemade Explosives Discovery on Surface and Dark Web. In Proceedings of the 11th International Conference on Availability, Reliability and Security (ARES 2016), Salzburg, Austria, Aug 2016.

Ilias Gialampoulidis, George Kalpakis, Theodora Tsikrika, Stefanos Vrochidis, Ioannis Kompatsiaris. Key player identification in terrorism-related social media networks using centrality measures. In Proceedings of the European Intelligence and Security Informatics Conference (EISIC 2016), August 17-19, Uppsala, Sweden, 2016.

George Kalpakis, Theodora Tsikrika, Christos Iliou, Theodore Mironidis, Stefanos Vrochidis, Jonathan Middleton, Una Williamson, and Ioannis Kompatsiaris. Interactive Discovery and Retrieval of Web Resources Containing Home Made Explosive Recipes. In Proceedings of the 4th International Conference on Human Aspects of Information Security, Privacy and Trust, Toronto, Canada, 17 - 22 July 2016.

Ilias Gialampoukidis, Anastasia Moumtzidou, Theodora Tsikrika, Stefanos Vrochidis, and Ioannis Kompatsiaris. Retrieval of Multimedia objects by Fusing Multiple Modalities. In Proceedings of the International Conference on Multimedia Retrieval (ICMR), New York, USA, June 6-9, 2016.

Theodora Tsikrika, Symeon Papadopoulos, Stefanos Vrochidis, and Yiannis Kompatsiaris. 10th European Summer School in Information Retrieval (ESSIR 2015). SIGIR Forum 49, 2 (January 2016), 57-66. DOI=http://dx.doi.org/10.1145/2888422.2888430.

2015

Theodora Tsikrika, Anstastia Moumtzidou, Stefanos Vrochidis, and Ioannis Kompatsiaris. Focussed Crawling of Environmental Web Resources Based on the Combination of Multimedia Evidence. Multimedia Tools and Applications, May 2015.

Theodora Tsikrika, George Kalpakis, Stefanos Vrochidis, Ioannis Kompatsiaris, Iraklis Paraskakis, Isaak Kavasidis, Jonathan Middleton, and Una Williamson. A Framework for the Discovery, Analysis, and Retrieval of Multimedia Homemade Explosives Information on the Web. In Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015.

George Kalpakis, Theodora Tsikrika, Foteini Markatopoulou, Nikiforos Pittaras, Stefanos Vrochidis, Vasileios Mezaris, Ioannis Patras, and Ioannis Kompatsiaris. Concept Detection on Multimedia Web Resources about Home Made Explosives. In Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015.

Theodora Tsikrika, Antonis Latas, Anastasia Moumtzidou, Elisavet Chatzilari, Stefanos Vrochidis and Ioannis Kompatsiaris. Discovery of Environmental Web Resources Based on the Combination of Multimedia Evidence. In Proceedings of the 2nd International Workshop on Environmental Multimedia Retrieval (EMR 2015), Shanghai, China, June 23, 2015.

Theodora Tsikrika, Katerina Andreadou, Anastasia Moumtzidou, Emmanouil Schinas, Symeon Papadopoulos, Stefanos Vrochidis, and Yiannis Kompatsiaris A Unified Model for Socially Interconnected Multimedia-Enriched Objects. In Proceedings of the 21st International Conference on MultiMedia Modeling (MMM 2015), 5-7 January, Sydney, Australia, 2015.
The final publication is available at Springer via http://dx.doi.org/.

2014

Ioannis Sarafis, Christos Diou, Theodora Tsikrika, and Anastasios Delopoulos. Weighted SVM from Clickthrough Data for Image Retrieval. In Proceedings of the IEEE International Conference on Image Processing (ICIP 2014), 27-30 October, Paris, France, 2014.

Theodora Tsikrika and Christos Diou. Multi-evidence User Group Discovery in Professional Image Search. In Proceedings of the 36th European Conference on Information Retrieval (ECIR 2014), 13-16 April, Amsterdam, The Netherlands, 2014.
The final publication is available at Springer via http://dx.doi.org/.

Marco Angelini, Nicola Ferro, Birger Larsen, Henning Müuller, Giuseppe Santucci, Gianmaria Silvello, Theodora Tsikrika. Measuring and Analyzing the Scholarly Impact of Experimental Evaluation Initiatives. Procedia Computer Science, Volume 38, pages 133-137, 2014.

Theodora Tsikrika, Anastasia Moumtzidou, Stefanos Vrochidis, and Ioannis Kompatsiaris. Focussed Crawling of Environmental Web Resources: A Pilot Study on the Combination of Multimedia Evidence. In Proceedings of the 2014 International Workshop on Environmental Multimedia Retrieval (EMR 2014), in conjunction with the ACM Conference on Multimedia Retrieval (ICMR 2014), 1 April, Glasgow, UK, 2014.

Marco Angelini, Nicola Ferro, Birger Larsen, Henning Mueller, Giuseppe Santucci, Gianmaria Silvello and Theodora Tsikrika. Measuring and Analyzing the Scholarly Impact of Experimental Evaluation Initiatives. In Proceedings of the 10th Italian Research Conference on Digital Libraries (IRCDL 2014), 30-31 January, Padua, Italy, 2014.

2013

Theodora Tsikrika, Birger Larsen, Henning Müller, Stefan Endrullis, and Erhard Rahm. The Scholarly Impact of CLEF (2000-2009). In Information Access Evaluation. Multilinguality, Multimodality, and Visualization - Proceedings of the 4th International Conference of the CLEF Initiative (CLEF 2013), pages 1-12, 23-26 September, Valencia, Spain, 2013.

Theodora Tsikrika. Discovering user groups in professional image search. In Proceedings of the ECIR 2013 workshop on Integrating IR technologies for Professional Search, 24 March, Moscow, Russia, 2013.

Donn Morrison, Theodora Tsikrika, Vera Hollink, Arjen P. de Vries, Éric Bruno, Stéphane Marchand-Maillet. Topic modelling of clickthrough data in image search. Multimedia Tools & Applications, Volume 66, Number 3, pages 493-515, Springer, 2013.
The final publication is available at link.springer.com.

2012

Theodora Tsikrika, Henning Müller, and Charles E. Kahn. Log Analysis to Understand Medical Professionals' Image Searching Behaviour. In Proceedings of the 24th European Medical Informatics Conference (MIE2012), 26-29 August,Pisa, Italy, 2012.

Theodora Tsikrika, Jana Kludas, and Adrian Popescu. Building reliable and reusable test collections for image retrieval:The Wikipedia task at ImageCLEF. IEEE Multimedia, Special Issue on Large-Scale Multimedia Data Collections, 19(3):24-33, July-September 2012.

2011

Theodora Tsikrika, Adrian Popescu, and Jana Kludas. Overview of the Wikipedia Image Retrieval task at ImageCLEF 2011. In the Working Notes for the CLEF 2011 Labs and Workshop, 19-22 September, Amsterdam, The Netherlands, 2011.

Jayashree Kalpathy-Cramer, Henning Müller, Steven Bedrick, Ivan Eggel, Alba G. Seco de Herrera, and Theodora Tsikrika. Overview of the CLEF 2011 Medical Image Classification and Retrieval Tasks. In the Working Notes for the CLEF 2011 Labs and Workshop, 19-22 September, Amsterdam, The Netherlands, 2011.

Theodora Tsikrika, Alba G. Seco de Herrera, and Henning Müller. Assessing the Scholarly Impact of ImageCLEF. In Proceedings of the Conference on Multilingual and Multimodal Information Access Evaluation (CLEF 2011), 19-22 September, Amsterdam, The Netherlands, 2011.

Vera Hollink, Theodora Tsikrika, and Arjen P. de Vries. Semantic search log analysis: a method and a study on professional image search. Journal of the American Society for Information Science and Technology, Volume 62, Issue 4, pages 691-713, 2011.

Theodora Tsikrika, Christos Diou, Arjen P. de Vries, and Anastasios Delopoulos. Reliability and Effectiveness of Clickthrough Data for Automatic Image Annotation. Multimedia Tools & Applications, Special issue on Image and Video Retrieval: Theory and Applications, Volume 55, Number 1, pages 27-52, Springer, 2011.
The final publication is available at link.springer.com.
The experimental results presented in the paper and the accompanying data can be accessed here.

2010

Adrian Popescu, Theodora Tsikrika and Jana Kludas. Overview of the wikipedia retrieval task at ImageCLEF 2010. In the Working Notes for the CLEF 2010 Workshop, 20-23 September, Padova, Italy, 2010.

Theodora Tsikrika and Jana Kludas. The Wikipedia Image Retrieval Task. In: ImageCLEF - Experimental evaluation in visual information retrieval. The Information Retrieval Series, Vol. 32, Springer, 2010.

Henning Rode, Theodora Tsikrika, and Arjen P. de Vries. Differences in Video Search Behaviour between Novices and Archivists. In Proceedings of the 8th International Workshop on Adaptive Multimedia Retrieval (AMR 2010), August 17-18, Linz, Austria, 2010.

Vera Hollink, Theodora Tsikrika, and Arjen P. de Vries. The semantics of query modification. In Proceedings of the 9th International Conference on Adaptivity, Personalization and Fusion of Heterogeneous Information (RIAO 2010), April 28-30, Paris, France, 2010.

Vera Hollink, Theodora Tsikrika, and Arjen P. de Vries. Semantic vs term-based query modification analysis. In Proceedings of the 10th Dutch-Belgian Information Retrieval Workshop (DIR 2010), 25 January, Nijmegen, the Netherlands, 2010.

Henning Müller and Theodora Tsikrika. Global Pattern Recognition: The ImageCLEF Benchmark. In IAPR Newsletter, vol. 32 no. 1, pp.3-6, January, 2010.

Theodora Tsikrika and Jana Kludas. Overview of the wikipediaMM task at ImageCLEF 2009. In Multilingual Information Access Evaluation Vol. II Multimedia Experiments -- Proceedings of the 10th Workshop of the Cross-Language Evaluation Forum (CLEF 2009), Revised Selected Papers, Lecture Notes in Computer Science, Springer, 2010.

Carol Peters, Barbara Caputo, Julio Gonzalo, Gareth J.F. Jones, Jayashree Kalpathy-Cramer, Henning Müller, and Theodora Tsikrika (eds.). Multilingual Information Access Evaluation II -- Multimedia Experiments, Proceedings of the 10th Workshop of the Cross-Language Evaluation Forum (CLEF 2009), Revised Selected Papers, Lecture Notes in Computer Science, vol. 6242, Springer, 2010.

2009

Christos Diou, George Stephanopoulos, Nikos Dimitriou, Panagiotis Panagiotopoulos, Christos Papachristou, Anastasios Delopoulos, Henning Rode, Theodora Tsikrika, Arjen P. de Vries, et al. VITALAS at TRECVID-2009. In Proceedings of the 7th TREC Video Retrieval Evaluation Workshop, 16-17 November, Gaithersburg, USA (TRECVID-2009), 2009.

Theodora Tsikrika and Jana Kludas. Overview of the wikipediaMM task at ImageCLEF 2009. In the Working Notes for the CLEF 2009 Workshop, 30 September - 2 October, Corfu, Greece, 2009.

Theodora Tsikrika and Arjen P. de Vries. CWI at the Photo Retrieval Task of ImageCLEF 2009. In the Working Notes for the CLEF 2009 Workshop, 30 September - 2 October, Corfu, Greece, 2009.

Theodora Tsikrika, Christos Diou, Arjen P. de Vries, and Anastasios Delopoulos. Are clickthrough data reliable as image annotations? In Proceedings of the Theseus/ImageCLEF workshop on visual information retrieval evaluation, 29 September, Corfu, Greece, 2009.

Theodora Tsikrika, Christos Diou, Arjen P. de Vries, and Anastasios Delopoulos. Image annotation using clickthrough data. In Proceedings of the 8th ACM International Conference on Image and Video Retrieval, 8-10 July, Santorini, Greece, 2009.
The experimental results presented in the paper and the accompanying data can be accessed here.

Theodora Tsikrika and Jana Kludas. Overview of the wikipediaMM task at ImageCLEF 2008. In Evaluating Systems for Multilingual and Multimodal Information Access -- Proceedings of the 9th Workshop of the Cross-Language Evaluation Forum (CLEF 2008), Revised Selected Papers, Lecture Notes in Computer Science, volume 5706, pp. 539-550, Springer, 2009.

Theodora Tsikrika. Aggregation-based Structured Text Retrieval. Encyclopedia of Database Systems, Editors-in-chief: Liu, Ling; Özsu, M. Tamer, Springer, 2009.

2008

Christos Diou, Christos Papachristou, Panagiotis Panagiotopoulos, George Stephanopoulos, Nikos Dimitriou, Anastasios Delopoulos, Henning Rode, Robin Aly, Arjen P. de Vries, and Theodora Tsikrika. VITALAS at TRECVID-2008. In Proceedings of the 6th TREC Video Retrieval Evaluation Workshop, 17-18 November, Gaithersburg, USA (TRECVID-2008).

Theodora Tsikrika and Jana Kludas. Overview of the wikipediaMM task at ImageCLEF 2008. In the Working Notes for the CLEF 2008 Workshop, 17-19 September, Aarhus, Denmark.

Theodora Tsikrika, Henning Rode and Arjen P. de Vries. CWI at ImageCLEF 2008. In the Working Notes for the CLEF 2008 Workshop, 17-19 September, Aarhus, Denmark.

Theodora Tsikrika and Thijs Westerveld. Multimedia Retrieval at INEX 2007. In SIGIR Forum, vol. 42 no. 1, pp.16-21, June, 2008.

Theodora Tsikrika and Thijs Westerveld. The INEX 2007 Multimedia Track. In Focused access to XML documents, Proceedings of the 6th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2007), Revised and Selected papers. Lecture Notes in Computer Science, vol. 4862, pp. 440-453, Springer, 2008.

Theodora Tsikrika, Pavel Serdyukov, Henning Rode, Thijs Westerveld, Robin Aly, Djoerd Hiemstra and Arjen P. de Vries. Structured Document Retrieval, Multimedia Retrieval, and Entity Ranking Using PF/Tijah. In Focused access to XML documents, Proceedings of the 6th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2007), Revised and Selected papers. Lecture Notes in Computer Science, vol. 4862, pp. 306-320, Springer, 2008.

2007

Theodora Tsikrika and Thijs Westerveld. Report on the INEX 2007 Multimedia Track. In Preproceedings of the 6th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2007), pp. 410-422, Dagstuhl, Germany, 2007.

Theodora Tsikrika, Pavel Serdyukov, Henning Rode, Thijs Westerveld, Robin Aly, Djoerd Hiemstra and Arjen P. de Vries. Structured Document Retrieval, Multimedia Retrieval, and Entity Ranking Using PF/Tijah. In Preproceedings of the 6th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2007), pp. 273-286, Dagstuhl, Germany, 2007.

Elham Ashoori, Mounia Lalmas and Theodora Tsikrika. Examining Topic Shifts in Content-Oriented XML Retrieval. International Journal on Digital Libraries, vol. 8, no. 1, pp. 39-60, 2007.

Theodora Tsikrika and Mounia Lalmas. Combining evidence for relevance criteria: a framework and experiments in Web retrieval. In Proceedings of the 29th European Conference on Information Retrieval (ECIR 2007), Rome, Italy, 2007.

2006

Stamatina Betsi, Mounia Lalmas, Anastasios Tombros and Theodora Tsikrika. User Expectations from XML Element Retrieval. In Proceedings of the 29th ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2006), Seattle, USA (Poster), 2006.

Mounia Lalmas, Stefan Rueger, Theodora Tsikrika and Alexei Yavlinsky. Progress in Information Retrieval. In Advances in Information Retrieval - Proceedings of the 28th European Conference on IR Research (ECIR 2006), London, UK, Lecture Notes in Computer Science, vol. 3936, Springer, 2006.

Mounia Lalmas, Andy MacFarlane, Stefan Rueger, Anastasios Tombros, Theodora Tsikrika and Alexei Yavlinsky (eds). Advances in Information Retrieval - Proceedings of the 28th European Conference on IR Research (ECIR 2006), London, UK, Lecture Notes in Computer Science, vol. 3936, Springer, 2006.

Thomas Roelleke, Theodora Tsikrika and Gabriella Kazai. A General Matrix Framework for Modelling Information Retrieval. Information Processing and Management, Special Issue: Formal Methods in Information Retrieval, vol. 42, no. 1, pp. 4-30, 2006.

2005

Theodora Tsikrika and Mounia Lalmas. Best Entry Pages for the Topic Distillation Task. Research Report (RR-05-02), Department of Computer Science, University of London, London E1 4NS, UK, May, 2005.

Theodora Tsikrika and Mounia Lalmas. Modelling Good Entry Pages on the Web. In Proceedings of the 15th International Symposium on Methodologies for Intelligent Systems (ISMIS 2005), Saratoga Springs, New York, USA, 2005.

2004

Theodora Tsikrika and Mounia Lalmas. Combining evidence for Web retrieval using the inference network model - an experimental study. Information Processing and Management, Special Issue: Bayesian Networks and Information Retrieval, vol. 40, no. 5, pp. 751-772, 2004.

2003

Thomas Roelleke, Theodora Tsikrika and Gabriella Kazai. A General Matrix Framework for Modelling Information Retrieval. In ACM SIGIR Workshop on Mathematical/Formal Methods in Information Retrieval (MF/IR 2003), Toronto, Canada, 2003.

2002

Theodora Tsikrika and Mounia Lalmas. Combining Web Document Representations in a Bayesian Inference Network Model Using Link and Content-Based Evidence. In Proceedings of the 24th European Colloquium on Information retrieval Research (ECIR 2002), Glasgow, Scotland, 2002.

2001

Theodora Tsikrika and Mounia Lalmas. Merging Techniques for Performing Data Fusion on the Web. In Proceedings of the 10th ACM International Conference on Information and Knowledge Management (CIKM 2001), Atlanta, Georgia, USA, 2001.