2022

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Leaf: Multiple-Choice Question Generation
Kristiyan Vachev | Momchil Hardalov | Georgi Karadzhov | Georgi Georgiev | Ivan Koychev | Preslav Nakov
Advances in Information Retrieval - 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part II

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DuoSearch: A Novel Search Engine for Bulgarian Historical Documents
Angel Beshirov | Suzan Hadzhieva | Ivan Koychev | Milena Dobreva
Advances in Information Retrieval - 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part II

2020

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Team Alex at CLEF CheckThat! 2020: Identifying Check-Worthy Tweets With Transformer Models
Alex Nikolov | Giovanni Da San Martino | Ivan Koychev | Preslav Nakov
Working Notes of CLEF 2020 - Conference and Labs of the Evaluation Forum, Thessaloniki, Greece, September 22-25, 2020

2018

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An Ensemble-Rich Multi-Aspect Approach Towards Robust Style Change Detection: Notebook for PAN at CLEF 2018
Dimitrina Zlatkova | Daniel Kopev | Kristiyan Mitov | Atanas Atanasov | Momchil Hardalov | Ivan Koychev | Preslav Nakov
Working Notes of CLEF 2018 - Conference and Labs of the Evaluation Forum, Avignon, France, September 10-14, 2018

2017

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Large-Scale Goodness Polarity Lexicons for Community Question Answering
Todor Mihaylov | Daniel Balchev | Yasen Kiprov | Ivan Koychev | Preslav Nakov
Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval, Shinjuku, Tokyo, Japan, August 7-11, 2017

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The Case for Being Average: A Mediocrity Approach to Style Masking and Author Obfuscation - (Best of the Labs Track at CLEF-2017)
Georgi Karadzhov | Tsvetomila Mihaylova | Yasen Kiprov | Georgi Georgiev | Ivan Koychev | Preslav Nakov
Experimental IR Meets Multilinguality, Multimodality, and Interaction - 8th International Conference of the CLEF Association, CLEF 2017, Dublin, Ireland, September 11-14, 2017, Proceedings

2016

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Experiments in Authorship-Link Ranking and Complete Author Clustering
Valentin Zmiycharov | Dimitar Alexandrov | Hristo Georgiev | Yasen Kiprov | Georgi Georgiev | Ivan Koychev | Preslav Nakov
Working Notes of CLEF 2016 - Conference and Labs of the Evaluation forum, Évora, Portugal, 5-8 September, 2016

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SU@PAN'2016: Author Obfuscation
Tsvetomila Mihaylova | Georgi Karadjov | Yasen Kiprov | Georgi Georgiev | Ivan Koychev | Preslav Nakov
Working Notes of CLEF 2016 - Conference and Labs of the Evaluation forum, Évora, Portugal, 5-8 September, 2016

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PANcakes Team: A Composite System of Domain-Agnostic Features For Author Profiling
Pepa Gencheva | Martin Boyanov | Elena Deneva | Preslav Nakov | Georgi Georgiev | Yasen Kiprov | Ivan Koychev
Working Notes of CLEF 2016 - Conference and Labs of the Evaluation forum, Évora, Portugal, 5-8 September, 2016

2015

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SU@PAN'2015: Experiments in Author Profiling
Yasen Kiprov | Momchil Hardalov | Preslav Nakov | Ivan Koychev
Working Notes of CLEF 2015 - Conference and Labs of the Evaluation forum, Toulouse, France, September 8-11, 2015

2004

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Within-Document Retrieval: A User-Centred Evaluation of Relevance Profiling
David J. Harper | Ivan Koychev | Sun Yixing | Iain Pirie
2004 Volume 7 Issue 3-4

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The Robert Gordon University's HARD Track Experiments at TREC 2004
David J. Harper | Gheorghe Muresan | Bicheng Liu | Ivan Koychev | Dietrich Wettschereck | Nirmalie Wiratunga
Proceedings of the Thirteenth Text REtrieval Conference, TREC 2004, Gaithersburg, Maryland, USA, November 16-19, 2004

2003

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Query-Based Document Skimming: A User-Centred Evaluation of Relevance Profiling
David J. Harper | Ivan Koychev | Sun Yixing
Advances in Information Retrieval, 25th European Conference on IR Research, ECIR 2003, Pisa, Italy, April 14-16, 2003, Proceedings