Past Activities

Journal Editor #

• Online Information Review (2017 – 2019)
  • Special Issue on Social and Cultural Biases in Information, Algorithms, and Systems

PC/Workshop Chair #

• Workshop “Knowledge Discovery, Data Mining, Maschinelles Lernen 2015” der GI-Fachgruppe KDML, 7. - 9. Oktober 2015, Trier
• 21st International Conference on Conceptual Structures (ICCS 2014), July 27 - 30, 2014, Iasi, Romania
• 22nd Conference on User Modeling, Adaptation and Personalization, July 7 - 14, 2014, Aalborg, Denmark
• ECML PKDD Discovery Challenge 2013, September 23 - 27, 2013, Prague, Czech Republic
• 9th International Conference on Formal Concept Analysis (ICFCA 2011), May 2 - 6, 2011, Nicosia, Cyprus
• ECML PKDD Discovery Challenge 2009, September 7, 2009, Bled, Slovenia
• Fourth Conceptual Structures Tool Interoperability Workshop (CS-TIW 2009), July 25, 2009, Moscow, Russia
• Viszards Session at Sunbelt 2009, March 10 - 15, 2009, San Diego, California,
• Workshop “Knowledge Discovery, Data Mining, Maschinelles Lernen 2008” der Fachgruppe KDML, 6. - 8. Oktober 2008, Würzburg
• ECML PKDD Discovery Challenge 2008, September 15, 2008, Antwerp, Belgium
• Third Conceptual Structures Tool Interoperability Workshop (CS-TIW 2008), July 7, 2008, Toulouse, France (Proceedings)

PC Member #

• 22nd Conference LWDA – Learning. Knowledge. Data. Analytics., October 5 – 7, 2022, Hildesheim, Germany
• 26th International Conference on Theory and Practice of Digital Libraries, September 20 – 23, 2022, Padua, Italy
• 16th ACM Conference on Recommender Systems, September 18 – 23, 2022, Seattle, USA
• 33rd ACM Conference on Hypertext and Social Media, June 28 – July 1, 2022, Barcelona, Spain
• The Web Conference, April 25 – 29 2022, Lyon, France
• 8. Jahrestagung des Verbands »Digital Humanities im deutschsprachigen Raum«, March 7 – 11, Potsdam, Germany
• 3rd International Symposium on Open Search Technology, October 11 – 13 2021, Online
• 15th ACM Conference on Recommender Systems, September 27th – October 1st 2021, Amsterdam, Netherlands
• 25th International Conference on Theory and Practice of Digital Libraries, September 3 – 17 2021, Online
• 32nd ACM Conference on Hypertext and Social Media, 30 August – 2 September 2021, Online
• 16th International Conference on Formal Concept Analysis, June 29 – July 2 2021, Strasbourg, France
• 29th ACM International Conference on Information and Knowledge Management, October 19 – 23, 2020, Online
• 24th International Conference on Theory and Practice of Digital Libraries, August 25 – 27, 2020, Lyon, France
• 31st ACM Conference on Hypertext and Social Media, July 13 – 15 2020, Online
• 7th International Open Science Conference, March 11 – 12 2020, Berlin, Germany
• The Web Conference, April 20 – 24 2020, Taipei, Taiwan
• The Web Conference, May 13 - 17, 2019, San Francisco, CA, USA
• The Web Conference, April 23 - 27, 2018, Lyon, France
• 11th ACM Conference on Recommender Systems (RecSys), August 27 - 31, 2017, Como, Italy
• European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), September 19 - 23, 2016, Riva del Garda, Italy
• 10th ACM Conference on Recommender Systems (RecSys), September 15 - 19, 2016, Boston, MA, USA
• 25th International World Wide Web Conference (WWW), April 11 - 15, 2016, Montréal, Canada
• 8th International Conference on Knowledge Capture (K-CAP), October 7 - 10, 2015, Palisades, NY, USA
• 9th ACM Conference on Recommender Systems (RecSys), September 16 - 20, 2015, Vienna, Austria
• 2nd International Workshop on Machine Learning for Urban Sensor Data (SenseML) at RecSys 2015, September 16 - 20, 2015, Vienna, Austria
• 7th ACM Web Science Conference, June 28 - July 1, 2015, Oxford, UK
• 23rd Conference on User Modeling, Adaptation and Personalization (UMAP), June 29 - July 3, 2015, Dublin, Ireland
• 13th International Conference on Formal Concept Analysis (ICFCA), June 23 - 26, 2015, Málaga, Spain
• 12th European Semantic Web Conference (ESWC), May 31 - June 4th, 2015, Portoroz, Slovenia
• 24th International World Wide Web Conference (WWW), May 18 - 22, 2015, Florence, Italy
• 8th ACM International Conference on Recommender Systems (RecSys), October 6 - 10, 2014, Foster City, California
• 6th ACM RecSys Workshop on Recommender Systems & The Social Web, October 6 - 10, 2014, Foster City, California
• European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), September 15 - 19, 2014, Nancy, France
• 8th Russian Summer School in Information Retrieval (RuSSIR), August 18 - 22, 2014, Nizhny Novgorod, Russia
• 22nd Conference on User Modeling, Adaptation and Personalization (UMAP), July 7 - 14, 2014, Aalborg, Denmark
• ACM Web Science Conference, June 23 - 26, 2014, Bloomington, Indiana
• 12th International Conference on Formal Concept Analysis (ICFCA), June 10 - 13, 2014, Cluj-Napoca, Romania
• 8th International AAAI Conference on Weblogs and Social Media (ICWSM), June 2 - 4, Ann Arbor, Michigan
• 11th European Semantic Web Conference (ESWC), May 25 - 29, 2014, Crete, Greece
• 23rd International World Wide Web Conference (WWW), April 7 - 11, 2014, Seoul, Korea
• 4th Making Sense of Microposts Workshop (#Microposts2014) at WWW 2014, April 7, 2014, Seoul, Korea
• 7th ACM International Conference on Recommender Systems (RecSys), October 12th - 16th, 2013, Hong Kong, China
• European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), September 23 - 27, 2013, Prague, Czech Republic
• ESWC PhD Symposium, May 26 - 30, 2013, Montpellier, France
• Seventh International Conference on Knowledge Capture (K-CAP), June 23 - 26, 2013, Banff, Canada
• 11th International Conference on Formal Concept Analysis (ICFCA 2013), May 21 - 24, 2013, Dresden, Germany
• Making Sense of Microposts Workshop (#MSM2013) at WWW 2013, May 13, 2013, Rio de Janeiro, Brazil
• Hypertext 2013: 24th ACM Conference on Hypertext and Hypermedia, May 1 - 3 2013, Paris, France
• Formal Concept Analysis meets Information Retrieval Workshop (FCAIR) at ECIR, March 24, 2013, Moscow, Russia
• 6th ACM International Conference on Recommender Systems - RecSys 2012, September 9th - 13th, 2012, Dublin, Ireland
• 13th International Conference on Electronic Commerce and Web Technologies - EC-Web 2012, September 3 - 7, 2012, Vienna, Austria
• First Workshop on the Social Web of Intelligent Things & People (SWITP 2012) at ECAI, August 27 - 31, 2012, Montpellier, France
• 10th International Conference on Formal Concept Analysis (ICFCA 2012), May 6 - 10, 2012, Leuven, Belgium
• 21st World Wide Web Conference - WWW 2012, April 16th - 20th, 2012, Lyon, France
• 5th ACM International Conference on Recommender Systems - RecSys 2011, October 23rd - 27th, 2011, Chicago, Illinois
• 2nd Challenge on Context-aware Movie Recommendation, October 27, Chicago, Illinois
• 12th International Conference on Electronic Commerce and Web Technologies - EC-Web 2011, August 29 - September 2, 2011, Toulouse, France
• Sixth International Conference on Knowledge Capture K-CAP, June 25th - 29th, 2011, Banff, Canada
• Hypertext 2011: 22nd ACM Conference on Hypertext and Hypermedia, June 6th - June 9th 2011, Eindhoven, The Netherlands
• Making Sense of Microposts Workshop (#MSM2011) at ESWC 2011, May 29/30, 2011, Heraklion, Crete
• Workshop “Knowledge Discovery, Data Mining, Maschinelles Lernen 2010” der Fachgruppe KDML, 4.-6. Oktober 2010, Kassel, Germany
• Personal Semantic Data Workshop, October 2010, Lisbon, Portugal
• Challenge on Context-aware Movie Recommendation, September 30, 2010, Barcelona, Spain
• 34th Annual Conference of the German Classification Society (GfKl 2010), July 21 - 23, 2010, Karlsruhe
• Extended Semantic Web Conference, May 30 - June 3 2010, Heraklion, Greece
• Workshop “Knowledge Discovery, Data Mining, Maschinelles Lernen 2009” der Fachgruppe KDML (21. - 23. September 2009, Darmstadt)
• K-CAP 2009: The Fifth International Conference on Knowledge Capture, September 1 – 4, 2009, Redondo Beach, California
• Hypertext 2009: 20th ACM Conference on Hypertext and Hypermedia, June 29th - July 1st 2009, Torino, Italy
• AAAI-SSS-09: Social Semantic Web: Where Web 2.0 Meets Web 3.0, 23 - 25 March 2009, Stanford, California
• Viszards Session at Sunbelt 2009, 10 - 15 March 2009, San Diego, California
• Mining Social Data (MSoDa), a satellite workshop of the 18th European Conference on Artificial Intelligence (ECAI 2008)