About

News

• November 2024: Togehter with Johannes Breuer, we gave a talk part of the GESIS Meet the Expeerts Series on "Collecting and Providing Web Data for the Social Sciences" (video)
• June 2024: I gave a talk on "AI methods for detecting and understanding scientific/health online discourse." at 2024 Frühjahrstagung des AK Demokratie, DeGEval
• May 2024: Togehter with Hajira Jabeen, we gave a talk part of the GESIS Meet the Expeerts Series on "Large Langauge Models: Opportunites and Challenges for the Social Sciences" (video)
• October 2023: I will be serving as a program chair for "Sustainable Archiving of Social Media Data - Twitter and Beyond" organized by German National Library
• March 2023: I authored a blog article on preserving Twitter data for the Social Sciences
• June 2022: I gave a guest lecture titled "Extracting, linking, and analyzing Discourse Data," part of the NLP course in the Master Program Digital Sciences at TH Köln, Germany
• October 2020: I gave a talk titled "Beyond research data infrastructures - exploiting artificial and crowd intelligence for building research knowledge graphs" at the 4th Open Research Knowledge Graphs Workshop at INFORMATIK2020
• August 2020: I gave a talk in the August 2020 edition of the Wikimedia Research Showcase (video)
• June 2020: COVID-19 Retweet Prediction Challenge I am co-organizing started officially
• August 2019: I was a visiting researcher at the eXascale Infolab at University of Fribourg, Fribourg, Switzerland
• May 2019: I gave a talk at CSSH at RWTH Aachen University, Aachen, Germany
• April 2019: I co-organized the Doctoral Consortium at ECIR 2019, Cologne, Germany
• February 2019: I was a finalist in the NYU Coleridge Initiative's Rich Context Competition, New York, USA ★
• December 2018: I successfully defended my Ph.D. thesis at WeST Insitute University of Koblenz-Landau, Germany
• July 2018: I submitted my Ph.D. thesis to WeST Institute at University of Koblenz-Landau, Germany
• May 2018: I gave a talk at WebSci'18 in Amsterdam, Netherlands

Research

Publications

• S. Gangopadhyay, D. Dessi, D. Dimitrov, S. Dietze. TeleScope: A Longitudinal Dataset for Investigating Online Discourse andInformation Interaction on Telegram. In Proceedings of the Nineteenth International AAAI Conference on Web and Social Media (ICWSM2025) 19(1), 2423-2433. (pdf) (poster)
• L. Birkenmaier, J. Daikeler, L. Fröhling, T. Gummer, C. Lechner, V. Lux, J. Schwalbach, H. Silber, B. Weiß, K. Weller, C. Wolf, D. Abel, J. Breuer, S. Dietze, D. Dimitrov, H. Döring, A. Hebel, O. Hochman, S., A. Katsanidou, J. Kohne, T. Kunz, F. Mangold, B. Mathiak, J. G. Piepenburg, R. Pollak, M. Quandt, B. Rammstedt, J. Rossmann, S. Schellhammer, A. Stroppe, F. Soldner, S. Stier, C. Wagner, O. Watteler, J. Weiß, B. Zapilko, and S. Ziaja. Defining and Evaluating Data Quality for the Social Sciences: Position Paper. 2024. Cologne, Germany. (GESIS Papers, 2024|06). GESIS – Leibniz Institute for the Social Sciences. (pdf)
• J. Nevin, P. Zhang, P. Groth, M. Lees, D. Dimitrov, S. Dietze. Understanding the impact of entity linking on the topology of entity co-occurrence networks for social media analysis: online first. In Knowledge Engineering and Knowledge Management: 24th International Conference (EKAW 2024), November 26–28, 2024, Amsterdam, The Netherlands.Lecture Notes in Computer Science(), vol 15370. Springer, Cham. (pdf)
• S. Linzbach, D. Dimitrov, L. Kallmeyer, K. Evang, H. Jabeen, S. Dietze. Dissecting Paraphrases: The Impact of Prompt Syntax and supplementary Information on Knowledge Retrieval from Pretrained Language Models. In Proceedings of the 2024 Conference of the North American Chapter of the Association for Computational Linguistics (NAACL2024), June 16–21, 2024, Mexico City, Mexico, Association for Computational Linguistics, ACL2024. (preprint)
• J. Schmüser, H. S. Ramulu, N. Wöhler, C. Stransky, F. Bensmann, D. Dimitrov, S. Schellhammer, D. Wermke, S. Dietze, Y. Acar, S. Fahl. Analyzing Security and Privacy Advice During the 2022 Russian Invasion of Ukraine on Twitter. In Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI '24), May 11-16, 2024, Honolulu, HI, USA (pdf), (video), Honorable Mention Award ★
• D. Biswas, S. Linzbach, D. Dimitrov, H. Jabeen, S. Dietze. Broadening BERT vocabulary for Knowledge Graph Construction using Wikipedia2Vec. In KBC-LM’23: Knowledge Base Construction from Pre-trained Language Models workshop at ISWC , Novermber 6-10, 2023, Athens, Greece (pdf)
• A. Katsanidou, M. Kneuer, F. Bensmann, D. Dimitrov, S. Dietze. Limitations of democratic rights during the Covid-19 pandemic—exploring the citizens’ perception and discussions on dangers to democracy in Germany. Zeitschrift für Vergleichende Politikwissenschaft 16 (4), 635-661 (pdf)
• D. Dimitrov, D. Segeth, and S. Dietze. Geotagging TweetsCOV19: Enriching a COVID-19 Twitter Discourse Knowledge Base with Geographic Information. In Companion Proceedings of the Web Conference 2022 (WWW ’22 Companion), April 25–29, 2022, Virtual Event, Lyon, France. (pdf), (slides)
• W. Otto, A. Zielinski, B. Ghavimi, D. Dimitrov, N. Tavakolpoursaleh, K. Abdulahhad, K. Boland, and S. Dietze. Knowledge extraction from scholarly publications: The GESIS contribution to the rich context competition. In Rich search and discovery for research datasets eds. Julia Lane, Ian Mulvany, and Paco Nathan, 107-127. Los Angeles u.a.: Sage. 2020.
• D. Dimitrov, E. Baran, P. Fafalios, R. Yu, X. Zhu, M. Zloch, and S. Dietze. TweetsCOV19 - A Knowledge Base of Semantically Annotated Tweets about the COVID-19 Pandemic. In the 29th ACM International Conference on Information and Knowledge Management (CIKM’2020), October 19–23, 2020, Virtual Event, Ireland. (pdf), (website)
• D. Dimitrov, F. Lemmerich, F. Flöck and M. Strohmaier. Different Topic, Different Traffic: How Search and Navigation Interplay on Wikipedia. The Journal of Web Science online first (1), 2019. (pdf)
• D. Dimitrov. Aspects of Information Access: Modeling Navigation on Wikipedia. Universität Koblenz-Landau, Universitätsbibliothek, 2018, Koblenz, Germany. (pdf)
• D. Dimitrov, F. Lemmerich, F. Flöck and M. Strohmaier. Query for Architecture, Click through Military: Comparing the Roles of Search and Navigation on Wikipedia. In 10th ACM Conference on Web Science (WebSci'18), May 27–30, 2018, Amsterdam, Netherlands. (pdf)
• D. Dimitrov, D. Helic and M. Strohmaier. Tag-based Navigation and Visualization. In: Peter Brusilovsky, Daqing He (eds) Social Information Access: Systems and Technologies, LNCS, vol 10100, Springer International Publishing, 2018. (Springer website)
• F. Lemmerich, P. Singer, M. Becker, L. Espin-Noboa, D. Dimitrov, D. Helic, A. Hotho, M. Strohmaier. Comparing hypotheses about sequential data: A Bayesian approach and its applications. In Joint European Conference on Machine Learning and Knowledge Discovery in Databases (ECML/PKDD'2017), September 18-22, 2017, Skopje, Macedonia.
• D. Dimitrov*, P. Singer*, F. Lemmerich and M. Strohmaier. What Makes a Link Successful on Wikipedia? In 26th International World Wide Web Conference (WWW'2017), April 3-7, 2017, Perth, Australia. (pdf) (code) (* equal contribution)
• D. Dimitrov. Modeling Navigation in Information Networks. In Doctoral Consortium at the 10th ACM International Conference on Web Search and Data Mining (WSDM'2017), February 6-10, 2017, Cambridge, United Kingdom. (pdf)
• D. Lamprecht, D. Dimitrov, D. Helic and M. Strohmaier. Evaluating and Improving Navigability of Wikipedia: A Comparative Study of Eight Language Editions. In 12th International Symposium on Open Collaboration (OpenSym'2016), August 17-19, 2016, Berlin, Germany. (pdf)
• M. Becker, H. Mewes, A. Hotho, D. Dimitrov, F. Lemmerich and M. Strohmaier. SparkTrails: A MapReduce Implementation of HypTrails for Comparing Hypotheses About Human Trails. In 25th International World Wide Web Conference (WWW'2016), April 11-15, 2016, Montreal, Canada. Poster submission. (pdf)
• D. Dimitrov, P. Singer, F. Lemmerich and M. Strohmaier. Visual Positions of Links and Clicks on Wikipedia. In 25th International World Wide Web Conference (WWW'2016), April 11-15, 2016, Montreal, Canada. Poster submission. (pdf) (code) (poster)
• D. Dimitrov, P. Singer, D. Helic and M. Strohmaier. The Role of Structural Information for Designing Navigational User Interfaces. In 26th ACM Conference on Hypertext and Social Media (HT'2015), September 1-4, 2015, Middle East Technical University Northern Cyprus Campus, Cyprus. (pdf)(pdf with corrected stretch)

Edited Proceedings

• K. Todorov, P. Fafalios, S. Dietze, D. Dimitrov, Proceedings of the 5th International Workshop on Computational Methods for Online Discourse Analysis (KnOD 2025), Companion Proceedings of the ACM Web Conference 2025, ACM 2025. (website)
• K. Todorov, P. Fafalios, S. Dietze, D. Dimitrov, Proceedings of the 4th International Workshop on Computational Methods for Online Discourse Analysis (KnOD 2024), Companion Proceedings of the ACM Web Conference 2024, ACM 2024. (website)
• K. Todorov, P. Fafalios, D. Dimitrov, S. Dietze, Proceedings of the 3th International Workshop on Knowledge Graphs for Online Discourse Analysis (KnOD 2023), Companion Proceedings of the ACM Web Conference 2023, ACM 2023. (website)
• D. Dimitrov, X. Zhu, Proceedings of the CIKM AnalytiCup 2020 co-located with 29th ACM International Conference on Information and Knowledge Management (CIKM 2020) Gawlay (Virtual Event), Ireland, October, 2020. CEUR Workshop Proceedings 2881.

Datasets

• S. Schellhammer, E. Baran, F. Bensmann, D. Dimitrov, S. Dietze, and Y. Zhang. 2024. TweetsKB: A Public and Large-Scale RDF Corpus of Annotated Tweets (Part 12, Sep 2022 - Jun 2023). (data)
• E. Baran, S. Schellhammer, D. Dimitrov, and S. Dietze. 2022. TweetsCOV19 - A Semantically Annotated Corpus of Tweets About the COVID-19 Pandemic (Part 4, January 2021 - August 2022). (data)
• S. Dennis, and D. Dimitrov. 2022. TweetsCOV19 - Geolocation Data (Part 1, October 2019 - April 2020) . (data)
• E. Baran, S. Schellhammer, D. Dimitrov, and S. Dietze. 2022. TweetsKB: A Public and Large-Scale RDF Corpus of Annotated Tweets (Part 10, Jan 2021 - Dec 2021). (data)
• E. Baran, S. Schellhammer, D. Dimitrov, and S. Dietze. 2022. TweetsKB: A Public and Large-Scale RDF Corpus of Annotated Tweets (Part 11, Jan 2022 - Aug 2022). (data)
• E. Baran, and D. Dimitrov. 2021. TweetsCOV19 - A semantically annotated corpus of tweets about the COVID-19 pandemic (Part 2, May 2020). (data)
• E. Baran, and D. Dimitrov. 2021. TweetsCOV19 - A semantically annotated corpus of tweets about the COVID-19 pandemic (Part 3, June 2020 - December 2020). (data)
• E. Baran, and D. Dimitrov. 2020. TweetsCOV19 - A Semantically Annotated Corpus of Tweets About the COVID-19 Pandemic (Part 1, October 2019 - April 2020). (data)
• E. Baran, and D. Dimitrov. 2020. TweetsKB - A Public and Large-Scale RDF Corpus of Annotated Tweets (Part 7, April 2018 - April 2019). (data)
• E. Baran, and D. Dimitrov. 2020. TweetsKB - A Public and Large-Scale RDF Corpus of Annotated Tweets (Part 8, May 2019 - April 2020). (data)

Reviewing Activities

Conferences and Workshops

• International Semantic Web Conference (ISWC'2024), PC Member of Resource Track
• Extended Semantic Web Conference (ESWC'2024), PC Member of Resource Track
• ACM Hypertext Conference (HT'2023), PC Member
• ACM Hypertext Conference (HT'2022), PC Member
• ACM Hypertext Conference (HT'2021), PC Member
• International Semantic Web Conference (ISWC'2021), PC Member of Resource Track
• International ACM SIGIR Conference on Research and Development in Information Retrieval(SIGIR'2021), PC Member of Resource Track
• ACM Hypertext Conference (HT'2020), PC Member of Social Media Analysis & Recommender Systems Track
• International Conference on Web and Social Media (ICWSM'2020), Dataset Track
• International World Wide Web Conference (WWW'2020), Subreviewer
• International Conference on Information and Knowledge Management (CIKM'2020), PC Member of Resource Track
• International Conference on Information and Knowledge Management (CIKM'2020), AnalytiCup Co-chair
• Extended Semantic Web Conference (ESWC'2020), PC Member of Machine Learning Track
• International Conference on Web Search and Data Mining (WSDM'2020), Subreviewer
• Doctoral Consortium at European Conference on Information Retrieval (DC@ECIR'2019), PC Member
• ACM Hypertext Conference (HT'2019), PC Member of Web and Social Media Track
• ACM Hypertext Conference (HT'2019), PC Member of Poster Track (Late-Breaking/Demos)
• Extended Semantic Web Conference (ESWC'2019), PC Member of Machine Learning Track, Best Reviewer Nomination ★
• International Semantic Web Conference (ISWC'2019), Subreviewer
• International Semantic Web Conference (ISWC'2017), Subreviewer
• International Conference on Web and Social Media (ICWSM'2016), Subreviewer
• Computational Social Science Winter Symposium (CSSWS'2015), PC Member
• International World Wide Web Conference (WWW'2015), Subreviewer
• ACM Web Science Conference (WebSci'2015), Subreviewer

Journals

• Transactions on the Web (2017)
• Information Processing and Management (2015)

Contact