Phone: +49-341-97 / 32263
Department: Automatische Sprachverarbeitung (NLP)
Room: 3-31
e-mail: witschel@informatik.uni-leipzig.de 

Address:
Hans Friedrich Witschel
Institut für Informatik
Universität Leipzig
Johannisgasse 26
04103 Leipzig

Postal Address:
Hans Friedrich Witschel
Universität Leipzig
Institut für Informatik
PF 100920
D-04009 Leipzig
Germany

Hans Friedrich Witschel

Areas of Research:

 
Teaching:

SS'06:
Seminar Information Retrieval
Mi, 11:15, SG 3-11

SS'05
Vorlesung "Inhaltsbasierte Suche in P2P-Systemen"
Di, 15:15, HS 9

Theses:

PhD thesis (submitted 08/04/2008): pdf
Diploma thesis: pdf

Publications:

Sandro Emmenegger, Knut Hinkelmann, Barbara Thönssen, and Hans FriedrichWitschel. KPIs 4 Workplace Learning. In Proceedings of the 8th International Conference on Knowledge Management and Information Sharing (KMIS), 2016.
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Sandro Emmenegger, Knut Hinkelmann, Emanuele Laurenzi, Barbara Thönssen, Hans Friedrich Witschel, and Congyu Zhang. Workplace Learning - Providing Recommendations of Experts and Learning Resources in a Context-sensitive and Personalized Manner. In Proceedings of Special Session on Learning Modeling in Complex Organizations (LCMO) at MODELSWARD'16, 2016.
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Ulf Sanne, Hans Friedrich Witschel, Alessio Ferrari, and Stefania Gnesi. Ensuring Action: Identifying Unclear Actor Specifications in Textual Business Process Descriptions. In Proceedings of the 8th International Conference on Knowledge Management and Information Sharing (KMIS), 2016.
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Daniel Schweizer, Michael Zehnder, Holger Wache, Hans Friedrich Witschel, Danilo Zanatta, and Miguel Rodriguez. Using consumer behavior data to reduce energy consumption in smart homes. In IEEE 2015 International Conference on Machine Learning and Applications, 2015.
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Michael Zehnder, Holger Wache, Hans Friedrich Witschel, Danilo Zanatta, and Miguel Rodriguez. Energy saving in smart homes based on consumer behavior: A case study . In The First IEEE International Smart Cities Conference, 2015.
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Pascal von Bergen, Knut Hinkelmann, and Hans Friedrich Witschel. Adapting an Enterprise Architecture for Business Intelligence. In 8th IFIP WG 8.1 working conference on the Practice of Enterprise Modelling, 2015.
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K. Riesen H.F. Witschel, E. Galie. A Graph-Based Recommender for Enhancing the Assortment of Web Shops. In Proceedings of Workshop on Data Mining in Marketing DMM'2015, 2015.
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S. Emmenegger J. Lutz H.F. Witschel, A. Martin. A new Retrieval Function for Ontology-Based Complex Case Descriptions. In Proceedings of CBR-MD'15, 2015.
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H.F. Witschel, S. Loo, and K. Riesen. How to Support Customer Segmentation with Useful Cluster Descriptions. In Proc. of Industrial Conference on Data Mining ICDM'15, 2015.
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B. Thönssen, H. F. Witschel and J. Lutz. Where Did I(t) put it? A holistic solution to the automatic construction of topic trees for navigation. In Proceedings of KMIS'14, 2014.
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H.F. Witschel, S. Emmenegger, T. Czekala, and A. Rossi. Index für den IT-Markt. UnternehmerZeitung, 7/8:30-31, 2014.
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B. Mühleisen, C. Schneider, H. F. Witschel, and C. Gutknecht. Success Factors of Enterprise 2.0. In Proceedings of I-KNOW 2013, 2013.
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J. Lutz, B. Thönssen, and H. F. Witschel. Breaking free from your information prison - A recommender based on semantically enriched context descriptions. In Proceedings of the First International Conference on Enterprise Systems (accepted for publication), 2013.
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V. Rivera Pelayo, S. Braun, U. V. Riss, H. F. Witschel, and B. Hu. Building Expert Recommenders from Email-Based Personal Social Networks. In T. Ozyer, editor, Advanced Social Networking Analysis and Mining. Springer, 2012 to appear.
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H. F. Witschel, T. Q. Nguyen, and K. Hinkelmann. Learning business rules for adaptive process models. In BUSTECH 2012 (Second International Conference on Business Intelligence and Technology, July 22-27, 2012, Nice, France), 2012.
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S. Brander, K. Hinkelmann, B. Hu, A. Martin, U.V. Riss, B. Thönssen, and H.F. Witschel. Refining process models through the analysis of informal work practice. In Proceedings of the 9th international conference on Business process management, pages 116-131, 2011.
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Hans Friedrich Witschel. Learning profiles for heterogeneous distributed information sources. Computing and Informatics, 29(4):571-584, 2010.
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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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