Stefan Siersdorfer

Contact Dr. Stefan Siersdorfer (Senior Researcher) L3S Research Center Appelstr. 9a 30167 Hannover, Germany siersdorfer

“Get me on my feet.”…- “How're you doing?” - “Am I on my feet?”

Terry Malloy

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Research Interests

• Social Web / Web 2.0
• Subjectivity on the Web
• Multimedia Retrieval
• Text Mining and Retrieval
• Ensemble-based and Distributed Machine Learning
• Classification and Clustering
• Crawling and Analysis of Web Data
  
  

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Publications

• Stefan Siersdorfer, Jose San Pedro, Mark Sanderson
  Content Redundancy in YouTube and its Application to Video Tagging
  ACM Transactions on Information Systems (TOIS), 2011
  
  
  
• Paul Clough, Andrew Cox, Stefan Siersdorfer
  Developing Metrics to Characterize Flickr Groups
  Journal of the American Society for Information Science and Technology (JASIST), 2011
  
  
  
• Stefan Siersdorfer, Jonathon Hare, Enrico Minack, Fan Deng
  Analyzing and Predicting Sentiment of Images on the Social Web (Short Paper)
  18th ACM Multimedia Conference (MM 2010), Florence, Italy
  
  
  
• Odysseas Papapetrou, Sukriti Ramesh, Stefan Siersdorfer, Wolfgang Nejdl
  Optimizing Near Duplicate Detection for P2P Networks
  10th IEEE International Conference on Peer-to-Peer Computing (IEEE P2P'10), Delft, The Netherlands
  
  
  
• Stefan Siersdorfer, Jose San Pedro, Sergiu Chelaru, Wolfgang Nejdl
  How useful are your comments?- Analyzing and Predicting YouTube Comments and Comment Ratings
  19th International World Wide Web Conference, WWW 2010, Raleigh, USA
  
  
  
• Stefan Siersdorfer, Jose San Pedro, Mark Sanderson
  Automatic Video Tagging using Content Redundancy
  32nd ACM SIGIR Conference, Boston, USA, 2009
  
  
  
• Stefan Siersdorfer, Sergej Sizov
  Social Recommender Systems for Web 2.0 Folksonomies
  20th ACM Conference on Hypertext and Hypermedia, Hypertext 2009, Torino, Italy
  
  
  
• Stefan Siersdorfer, Jose San Pedro
  Ranking and Classifying Attractiveness of Photos in Folksonomies
  18th International World Wide Web Conference, WWW 2009, Madrid, Spain
  

• Stefan Siersdorfer, Sergej Sizov
  Meta Methods for Model Sharing in Personal Information Systems
  ACM Transactions on Information Systems (TOIS), 2008.
  (preprint)

• Stefan Siersdorfer, Sergej Sizov
  Restrictive Methods and Meta Methods for Thematically Focused Web Search
  In Handbook of Research on Web Information Systems Quality.
  Edited by Coral Calero, Angeles Moraga, Mario Piattini. IGI Global, 2008.

• Paul Clough, Rob Pasely, Stefan Siersdorfer, Jose San Pedro, Mark Sanderson
  Visualising the South Yorkshire Floods of '07
  Workshop on Geographic Information Retrieval
  at ACM Conference on Information and Knowledge Management (CIKM), Lisbon, Portugal, 2007.
  

• Stefan Siersdorfer, Sergej Sizov, Paul Clough
  Know the Right People? Recommender Systems for Web 2.0
  GI Knowledge Management Workshop (FGWM) at LWA, Halle, Germany, 2007.
  

• Stefan Siersdorfer, Gerard de Melo
  Multilingual Text Classification using Ontologies
  29th European Conference on Information Retrieval (ECIR),  Rome, Italy, 2007.
  

• Stefan Siersdorfer, Ralitsa Angelova
  A Neighborhood-Based Approach for Clustering of Linked Document Collections (Poster Paper)
  15th Conference on Information and Knowledge Management (CIKM), Arlington, VA, USA, 2006.
  

• Stefan Siersdorfer, Sergej Sizov
  Automatic Document Organization in a P2P Environment
  28th European Conference on Information Retrieval (ECIR),  London, UK, 2006.
  
  
  
• Stefan Siersdorfer
  Combination Methods for Automatic Document Organization
  PhD Thesis, Max-Planck-Institute for Computer Science (MPII), Saarbrücken, Germany, 2005.

• Stefan Siersdorfer, Gerhard Weikum
  Automated Retraining Methods for Document Classification and their Parameter Tuning
  6th International Conference on Web Information Systems Engineering (WISE),  New York City, USA, 2005.

(Technical Report Version: MPI-I-2005-5-002)

• Stefan Siersdorfer, Andreas Kaster, Gerhard Weikum
  Combining Text and Linguistic Document Representations for Authorship Attribution
  SIGIR Workshop: Stylistic Analysis of Text for Information Access (STYLE),  Salvador, Bahia, Brazil, 2005.
  
• Stefan Siersdorfer, Gerhard Weikum
  Using Restrictive Classification and Meta Classification for Junk Elimination
  27th European Conference on Information Retrieval (ECIR), Santiago de Compostela, Spain, 2005.
  

• Stefan Siersdorfer, Sergej Sizov
  Restrictive Clustering and Metaclustering for self-organizing Document Collections
  27th Annual International ACM Conference on Research and Development in Information Retrieval (SIGIR), Sheffield, UK, 2004.
  

• Stefan Siersdorfer, Sergej Sizov, Gerhard Weikum
  Goal-oriented Methods and Meta Methods for Document Classification and their Parameter Tuning
  13th Conference on Information and Knowledge Management (CIKM), Washington D.C., USA, 2004.
  

• Stefan Siersdorfer, Sergej Sizov
  Konstruktion von Featureräumen und Metaverfahren zur Klassifikation von Webdokumenten (in German)
  10th Conference on Database Systems for Business, Technology and Web (BTW), Leipzig, Germany, 2003.
  
• Sergej Sizov, Michael Biwer, Jens Graupmann, Stefan Siersdorfer,
  Martin Theobald, Gerhard Weikum, Patrick Zimmer
  The BINGO! System for Information Portal Generation and Expert Web Search.
  1st Semiannual Conference on Innovative Data Systems Research (CIDR), Asilomar(CA), 2003.
  

• Sergej Sizov, Martin Theobald, Stefan Siersdorfer, Gerhard Weikum
  BINGO!: Bookmark-Induced Gathering of Information
  3rd International Conference on Web Information Systems Engineering (WISE), Singapore, 2002.
  
• Sergej Sizov, Stefan Siersdorfer, Martin Theobald, Gerhard Weikum
  The BINGO! Focused Crawler: from Bookmarks to Archetypes (Demo Paper).
  IEEE Computer Society International Conference on Data Engineering (ICDE), San Jose, California, 2002.
  

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Reviewer

• PC Member of International World Wide Web Conference (WWW 2012)
• PC Member of ACM International Conference on Web Search and Data Mining (WSDM 2011)
• PC Member of European Conference on Machine Learning (ECML 2009)
• PC Member of IEEE/WIC/ACM International Conference on Web Intelligence (WI 2010)
• PC Member of ACM Conference on Hypertext and Hypermedia (HT 2010)
• Reviewer for ACM Transactions on Information Systems (TOIS 2011)
• Reviewer for IEEE Transactions on Knowledge and Data Engineering (TKDE 2006, 2007, 2008, 2009)
• Reviewer for IEEE Transactions on Multimedia (2009)
• Reviewer for ACM Transactions on the Web (TWEB 2009, 2010)
• Reviewer for Elsevier Journal on Data and Knowledge Engineering (DKE 2009, 2010)
• Reviewer for Elsevier Journal on Information Processing & Management (IPM 2011)
• PC Member of European Conference on Information Retrieval (ECIR 2007, 2008, 2009, 2010)
• PC Member of International Conf. on Research and Development in Information Retrieval (SIGIR 2008)
• PC Member of Workshop on Tagging, Mining and Retrieval of Human Related Activity Information 2007
• Peer Reviewer for ICDE (International Conference on Data Engineering)
• Peer Reviewer for VLDB (International Conference on Very Large Data Bases)
  
  

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