Recent Roles

>> General Chair of ESSIR 2011 - 8th European Summer School on Information Retrieval

>> Co-Director ACM SIGWEB - Special Interest Group on Hypertext, Hypermedia and the Web (publicity Europe)

>> WebScienceTrust network - co-investigator, Chief Editor of the "Handbook of Web Science" (Springer)

>> PhD Committee member at the Dept. of Computer Science, University of Koblenz

Workshop/Conference organization

General Chair of the International Workshop on DETecting and Exploiting Cultural diversiTy on the Social Web (DETECT'11, in conjunction with CIKM 2011)

Program Chair of the Cross-lingual Expert Search (CriES) Pilot Challenge at CLEF 2010

Program Chair des International Workshop on Recommendation and Collaboration ( ReColl'08, in conjunction with IUI 2008)

Program Chair des International Workshop on Collaborative Knowledge Management for Web Information Systems (WE.Know'07, in conjunction with WISE'07)

Last but not least, co-organizer in the local team of conferences

  • Informatik 2013: 43rd Annual Symposium of the German Association of Computer Science (GI), Koblenz, Germany, 2013
  • WebSci 2011: 3rd ACM Web Science Conference, Koblenz, Germany, 2011
  • ISWC 2011: 10th International Semantic Web Conference, Bonn, Germany, 2011

See also..

  • Editorial activities for journals, conferences, and workshops
  • Projects: coordinator and co-investigator of several projects
  • Lectures + seminars: teaching, professional education offers, etc.