H.F. Witschel, T. Leidig, V. Kaufman, M. Ostertag, U. Brecht, O. Grebner. Optimisation of Knowledge Work in the Public Sector by Means of Digital Metaphors. In Proceedings of I-KNOW 2010, 2010.
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H.F. Witschel, B. Hu, U.V. Riss, B. Thönssen, R. Brun, A. Martin, K. Hinkelmann. A Collaborative Approach to Maturing Process-Related Knowledge. In Richard Hull, Jan Mendling, and Stefan Tai, editors, Business Process Management, volume 6336 of Lecture Notes in Computer Science, pages 343-358. Springer Berlin / Heidelberg, 2010.
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M. Ramezani, H.F. Witschel, S. Braun, V. Zacharias. Using Machine Learning to Support Continuous Ontology Development. In Proceedings of 17th International Conference on Knowledge Engineering and Knowledge Management, EKAW 2010, 2010.
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M. Ramezani, H.F. Witschel. An Intelligent System for Semi-Automatic Evolution of Ontologies. In IEEE Conference on Intelligent Systems, pages 73-78, 2010.
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B. Hu, Y. Du, L. Cheng, U. V. Riss, H.F. Witschel. Utilising Task Patterns in Organisational Process Knowledge Sharing. In Proccedings of ASWC'09), 2009.
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U. V. Riss, H.F. Witschel, R. Brun, B. Thönssen. What is Organizational Knowledge Maturing and How can it be Assessed? In Proccedings of the 9th International Conference on Knowledge Management (I'Know'09), 2009.
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Mario Kubek, H.F. Witschel. A System for Automatic Query Expansion in a Browser-based Environment. In Proccedings of the 6th International Workshop for Technical, Economic and Legal Aspects of Business Models for Virtual Goods (VG'08), 2008.
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H.F. Witschel. Ranking Information Resources in Peer-to-Peer Text Retrieval: an Experimental Study. In Proccedings of the 6th Workshop on Large-Scale Distributed Systems for Information Retrieval (LSDS-IR'08), 2008.
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H.F. Witschel, F. Holz, G. Heinrich, and S. Teresniak. An Evaluation Measure for Distributed Information Retrieval Systems. In Proccedings of the 30th European Conference on Information Retrieval (ECIR), 2008.
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H.F. Witschel. Global Term Weights in Distributed Environments. Information Processing and Management, 44(3):1049–1061, 2008.
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A.-C. Ngonga Ngomo and H.F. Witschel. A Framework for Adaptive Information Retrieval. In Proceedings of the First International Conference on the Theory of Information Retrieval (ICTIR), 2007.
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C. Biemann and H.F. Witschel. Webspam Detection via Semi-Supervised Graph Partitioning. In Proc. of GraphLab'07, Workshop on Graph Labelling at ECML/PKDD, 2007.
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R. Baeza-Yates, F. Junqueira, V. Plachouras, and H. F. Witschel. Admission Policies for Caches of Search Engine Results. In Proceedings of SPIRE'07, 2007.
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F. Holz, H. F. Witschel, G. Heinrich, G. Heyer, and S. Teresniak. An evaluation framework for semantic search in P2P networks. In Proceedings of I2CS'07, 2007.
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H.F. Witschel. Global Resources for Peer-to-Peer Text Retrieval. In SIGIR'07 Doctoral Consortium, 2007. [Only abstract will be published].
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H. F. Witschel. Multi-level Association Graphs - A New Graph-Based Model for Information Retrieval. In Proceedings of the HLT-NAACL-07 Workshop on Textgraphs-07, Rochester, NY, USA, 2007.
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G. Heinrich, S. Teresniak, and H. F. Witschel. Entwicklung von Testkollektionen für P2P Information Retrieval. In Christian Hochberger and Rdiger Liskowsky, editors, Workshop P2P Information Retrieval, 36. Jahrestagung der Gesellschaft fr Informatik, volume P-93 of Lecture Notes in Computer Science (LNI), pages 20-27, 2006.
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H.F. Witschel. Carrot and Stick - Combining Information Retrieval Models. In DocEng '06: Proceedings of the 2006 ACM symposium on Document engineering, 2006.
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H.F. Witschel. Estimation of global term weights for distributed and ubiquitous IR. In Proc. of Ubiquitous Knowledge Discovery for users, Workshop at ECML/PKDD'06, 2006.
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H.F. Witschel and F. Schmidt. Information Structuring and Product Classification. In TSTT '06: Proceedings of the International Conference on Terminology, Standardization and Technology Transfer, Beijing, 2006.
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U. C. Eiken, A. T. Liseth, H. F. Witschel, M. Richter, and C. Biemann. Ord i Dag: Mining Norwegian Daily Newswire. In Advances in Natural Language Processing, pages 512-523. Springer, Berlin/Heidelberg, 2006.
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H.F. Witschel and T. Böhme. Evaluating profiling and query expansion methods for p2p information retrieval. In Proc. of the 2005 ACM Workshop on Information Retrieval in Peer-to-Peer Networks (P2PIR), 2005.
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H.F. Witschel and C. Biemann. Rigorous dimensionality reduction through linguistically motivated feature selection for text categorization. In Proceedings of NODALIDA'05, 2005.
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H.F. Witschel and H. Unger. Vernetzung virtueller Gemeinschaften mit P2P-Technologien. In Proceedings of GeNeMe'05, 2005.
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H.F. Witschel. Using decision trees and text mining techniques for extending taxonomies. In Proc. of Learning and Extending Lexical Ontologies by using Machine Learning Methods, Workshop at ICML-05, 2005.
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H.F. Witschel. Terminology extraction and automatic indexing - comparison and qualitative evaluation of methods. In Proc. of Terminology and Knowledge Engineering (TKE), 2005.
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H.F. Witschel. Text, Wörter, Morpheme - Möglichkeiten einer automatischen Terminologie-Extraktion. In B. Fisseni, H.-C. Schmitz, B. Schröder, and P. Wagner, editors, Proc. of GLDV-Tagung 2005, pages 659-672, Frankfurt, 2005. Peter Lang.
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S. Bordag, H.F. Witschel, and T. Wittig. Evaluation of Lexical Acquisition Algorithms. In B. Fisseni, H.-C. Schmitz, B. Schröder, and P. Wagner, editors, Proc. of GLDV-Tagung 2005, pages 449-461, Frankfurt, 2005. Peter Lang.
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H.F. Witschel. Content-oriented Topology Restructuring for Search in P2P Networks. Technical report, University of Leipzig, 2005.
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H.F. Witschel. Terminologie-Extraktion: Möglichkeiten der Kombination statistischer und musterbasierter Verfahren. Content and Communication: Terminology, Language Resources and Semantic Interoperability. Ergon Verlag, Würzburg, 2004.
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L. Maicher, K. Böhm, H.F. Witschel, and A. Carradori. Moving Topic Maps to Mainstream - Integration of Topic Map Generation in the User's Working Environment. In Proceedings of I-KNOW'04, pages 241-251, 2004.
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C. Biemann, G. Heyer, H.F. Witschel, and F. Schmidt. Eine Wissenslandkarte der Knowtech. In T. Schildhauer N. Gronau, B. Petkoff, editor, Wissensmanagement - Wandel, Wertschöfung, Wachstum, pages 207-216. GITO, Berlin, 2004.
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