@inproceedings{krause2008antisocial, title = {The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems}, author = {Beate Krause and Andreas Hotho and Gerd Stumme}, booktitle = {Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web}, year = 2008, url = {http://airweb.cse.lehigh.edu/2008/submissions/krause_2008_anti_social_tagger.pdf}, biburl = {http://www.bibsonomy.org/bibtex/203d349d70b578ca9ac3155f661151868/stumme}, keywords = {2008 systems bookmarking myown web tagger 2.0 social web2.0 folksonomy folksonomies tagorapub spam} } @inproceedings{cattuto08-semantic, title = {Semantic Analysis of Tag Similarity Measures in Collaborative Tagging Systems}, address = {Patras, Greece}, author = {Ciro Cattuto and Dominik Benz and Andreas Hotho and Gerd Stumme}, booktitle = {Proceedings of the 3rd Workshop on Ontology Learning and Population (OLP3)}, month = {July}, year = 2008, url = {http://olp.dfki.de/olp3/}, abstract = {Social bookmarking systems allow users to organise collections of resources on the Web in a collaborative fashion. The increasing popularity of these systems as well as first insights into their emergent semantics have made them relevant to disciplines like knowledge extraction and ontology learning. The problem of devising methods to measure the semantic relatedness between tags and characterizing it semantically is still largely open. Here we analyze three measures of tag relatedness: tag co-occurrence, cosine similarity of co-occurrence distributions, and FolkRank, an adaptation of the PageRank algorithm to folksonomies. Each measure is computed on tags from a large-scale dataset crawled from the social bookmarking system del.icio.us. To provide a semantic grounding of our findings, a connection to WordNet (a semantic lexicon for the English language) is established by mapping tags into synonym sets of WordNet, and applying there well-known metrics of semantic similarity. Our results clearly expose different characteristics of the selected measures of relatedness, making them applicable to different subtasks of knowledge extraction such as synonym detection or discovery of concept hierarchies.}, biburl = {http://www.bibsonomy.org/bibtex/23b0aca61b24e4343bd80390614e3066e/stumme}, keywords = {systems 2008 collaborative tagging web2.0 semantic web myown folksonomy folksonomies 2.0} } @proceedings{themenheft2007webmining, title = {Themenheft Web Mining}, editor = {Andreas Hotho and Gerd Stumme}, journal = {Künstliche Intelligenz}, number = 3, pages = {5-8}, year = 2007, url = {http://www.kuenstliche-intelligenz.de/index.php?id=7758}, biburl = {http://www.bibsonomy.org/bibtex/2e053389338dafde2946ec585bc35a48e/stumme}, keywords = {mining ki ir 2007 web myown ml introduction} } @article{themenheft2007webmining, title = {Mining the World Wide Web -- Methods, Ap- plications, and Perspectives}, author = {Andreas Hotho and Gerd Stumme}, journal = {Künstliche Intelligenz}, number = 3, pages = {5-8}, year = 2007, url = {http://www.kuenstliche-intelligenz.de/index.php?id=7758}, biburl = {http://www.bibsonomy.org/bibtex/2e9535ec82afa53f44a1b37704aa9a71f/stumme}, keywords = {mining ki ir 2007 web myown ml introduction} } @inproceedings{grahl07conceptualKdml, title = {Conceptual Clustering of Social Bookmark Sites}, author = {Miranda Grahl and Andreas Hotho and Gerd Stumme}, booktitle = {Workshop Proceedings of Lernen - Wissensentdeckung - Adaptivität (LWA 2007)}, editor = {Alexander Hinneburg}, month = {sep}, pages = {50-54}, publisher = {Martin-Luther-Universität Halle-Wittenberg}, year = 2007, url = {http://www.kde.cs.uni-kassel.de/hotho/pub/2007/kdml_recommender_final.pdf}, isbn = {978-3-86010-907-6}, vgwort = {14}, biburl = {http://www.bibsonomy.org/bibtex/26d5188d66564fe4ed7386e28868504de/stumme}, keywords = {2007 bookmark bookmarking collaborative tagging myown Social social folksonomy folksonomies tagorapub conceptual clustering} } @inproceedings{Jaeschke2008logsonomy, title = {Logsonomy — A Search Engine Folksonomy}, author = {Robert Jäschke and Beate Krause and Andreas Hotho and Gerd Stumme}, booktitle = {Proceedings of the Second International Conference on Weblogs and Social Media(ICWSM 2008)}, publisher = {AAAI Press}, year = 2008, url = {http://www.kde.cs.uni-kassel.de/hotho/pub/2008/Krause2008logsonomy_short.pdf}, abstract = {In social bookmarking systems users describe bookmarks by keywords called tags. The structure behind these social systems, called folksonomies, can be viewed as a tripartite hypergraph of user, tag and resource nodes. This underlying network shows specific structural properties that explain its growth and the possibility of serendipitous exploration. Search engines filter the vast information of the web. Queries describe a user’s information need. In response to the displayed results of the search engine, users click on the links of the result page as they expect the answer to be of relevance. The clickdata can be represented as a folksonomy in which queries are descriptions of clicked URLs. This poster analyzes the topological characteristics of the resulting tripartite hypergraph of queries, users and bookmarks of two query logs and compares it two a snapshot of the folksonomy del.icio.us.}, biburl = {http://www.bibsonomy.org/bibtex/2359e1eccdc524334d4a2ad51330f76ae/stumme}, keywords = {2008 search engine logsonomy logsonomies myown folksonomy tagorapub folksonomies} } @inproceedings{krause2008comparison, title = {A Comparison of Social Bookmarking with Traditional Search}, author = {Beate Krause and Andreas Hotho and Gerd Stumme}, booktitle = {Advances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008}, editor = {Craig Macdonald and Iadh Ounis and Vassilis Plachouras and Ian Ruthven and Ryen W. White}, pages = {101-113}, year = 2008, abstract = {Social bookmarking systems allow users to store links to internet resources on a web page. As social bookmarking systems are growing in popularity, search algorithms have been developed that transfer the idea of link-based rankings in the Web to a social bookmarking system’s data structure. These rankings differ from traditional search engine rankings in that they incorporate the rating of users. In this study, we compare search in social bookmarking systems with traditionalWeb search. In the first part, we compare the user activity and behaviour in both kinds of systems, as well as the overlap of the underlying sets of URLs. In the second part,we compare graph-based and vector space rankings for social bookmarking systems with commercial search engine rankings. Our experiments are performed on data of the social bookmarking system Del.icio.us and on rankings and log data from Google, MSN, and AOL. We will show that part of the difference between the systems is due to different behaviour (e. g., the concatenation of multi-word lexems to single terms in Del.icio.us), and that real-world events may trigger similar behaviour in both kinds of systems. We will also show that a graph-based ranking approach on folksonomies yields results that are closer to the rankings of the commercial search engines than vector space retrieval, and that the correlation is high in particular for the domains that are well covered by the social bookmarking system.}, biburl = {http://www.bibsonomy.org/bibtex/2a412eda2e397f691b5581e0622c50eeb/stumme}, keywords = {2008 bookmarking search social myown folksonomy tagorapub folksonomies comparison} } @article{jaeschke08discovering, title = {Discovering Shared Conceptualizations in Folksonomies}, author = {Robert Jäschke and Andreas Hotho and Christoph Schmitz and Bernhard Ganter and Gerd Stumme}, journal = {Journal of Web Semantics}, number = 1, pages = {38-53}, volume = 6, year = 2008, url = {http://dx.doi.org/10.1016/j.websem.2007.11.004}, biburl = {http://www.bibsonomy.org/bibtex/2eb0bdaeab0aa5d4c528c97e2b10770b9/stumme}, keywords = {shared 2008 formal discovering concept triadic bibsonomy myown folksonomies l3s analysis fca} } @proceedings{ganter05formal, title = {Formal Concept Analysis -- Foundations and Applications}, address = {Heidelberg}, editor = {B. Ganter and G. Stumme and R. Wille}, publisher = {Springer}, series = {LNAI}, volume = 3626, year = 2005, comment = {alpha}, biburl = {http://www.bibsonomy.org/bibtex/27aa55e01ef34b4ce2b364ae7f169b078/stumme}, keywords = {2005 OntologyHandbook FCA myown} } @incollection{Stumme95, title = {A geometrical heuristic for drawing concept lattices}, author = {G. Stumme and R. Wille}, booktitle = {Graph Drawing}, editor = {R. Tamassia and I.G. Tollis}, pages = {452--459}, publisher = {Springer-Verlag}, series = {Lecture Notes in Computer Science, Vol. 894}, year = 1995, biburl = {http://www.bibsonomy.org/bibtex/2e2ae749ca645c1526e7c76f752b03c87/stumme}, keywords = {1995 OntologyHandbook FCA myown} } @inproceedings{Stum00fast, title = {Fast computation of concept lattices using data mining techniques.}, address = {Berlin}, author = {G. Stumme and R. Taouil and Y. Bastide and N. Pasquier and L. Lakhal}, booktitle = {Proc. 7th Intl. Workshop on Knowledge Representation Meets Databases}, month = {21--22.August}, note = {{http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/}}, publisher = {CEUR-Workshop Proceeding.}, year = 2000, biburl = {http://www.bibsonomy.org/bibtex/2a17891b3a55b119d0b8ca5d398a9fe1b/stumme}, keywords = {OntologyHandbook FCA myown 2000} } @inproceedings{stumme01intelligent, title = {Intelligent Structuring and Reducing of Association Rules with Formal Concept Analysis.}, author = {G. Stumme and R. Taouil and Y. Bastide and N. Pasquier and L. Lakhal}, booktitle = {KI 2001: Advances in Artificial Intelligence}, editor = {F. Baader and G. Brewker and T. Eiter}, pages = {335--350}, publisher = {Springer, Heidelberg}, series = {LNAI}, volume = 2174, year = 2001, biburl = {http://www.bibsonomy.org/bibtex/2e32d86d6f87076bb385aae401d3d0c73/stumme}, keywords = {OntologyHandbook FCA myown 2001} } @article{Stumme02computing, title = {Computing Iceberg Concept Lattices with Titanic.}, author = {G. Stumme and R. Taouil and Y. Bastide and N. Pasqier and L. Lakhal}, journal = {J. on Data and Knowledge Engineering}, number = 2, pages = {189--222}, volume = 42, year = 2002, biburl = {http://www.bibsonomy.org/bibtex/20238a6582da13957c5f5a919f0c0fa24/stumme}, keywords = {2002 OntologyHandbook FCA myown} } @article{stumme02computing, title = {Computing Iceberg Concept Lattices with Titanic}, author = {G. Stumme and R. Taouil and Y. Bastide and N. Pasqier and L. Lakhal}, journal = {J. on Knowledge and Data Engineering}, number = 2, pages = {189--222}, volume = 42, year = 2002, biburl = {http://www.bibsonomy.org/bibtex/254a98970c6aad7936e6f246b3cc414a7/stumme}, keywords = {2002 OntologyHandbook FCA myown} } @book{Stumm02formal, title = {Formal Concept Analysis on its Way from Mathematics to Computer Science.}, author = {G. Stumme}, journal = {\emph{Proc. 10th Intl. Conf. on Conceptual Structures (ICCS 2002)}}, publisher = {Springer, Heidelberg}, volume = {LNCS}, year = 2002, biburl = {http://www.bibsonomy.org/bibtex/276d2cce14c1594df0d5f8350ab2d254d/stumme}, keywords = {2002 OntologyHandbook FCA myown} } @article{stumme03off, title = {Off to New Shores -- Conceptual Knowledge Discovery and Processing}, author = {G. Stumme}, journal = {Intl. J. Human-Comuter Studies (IJHCS)}, month = {September}, number = 3, pages = {287-325}, volume = 59, year = 2003, url = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/stumme2003off.pdf}, comment = {alpha}, abstract = {In the last years, the main orientation of Formal Concept Analysis (FCA) has turned from mathematics towards computer science. This article provides a review of this new orientation and analyzes why and how FCA and computer science attracted each other. It discusses FCA as a knowledge representation formalism using five knowledge representation principles provided by Davis, Shrobe, and Szolovits (1993). It then studies how and why mathematics-based researchers got attracted by computer science. We will argue for continuing this trend by integrating the two research areas FCA and Ontology Engineering. The second part of the article discusses three lines of research which witness the new orientation of Formal Concept Analysis: FCA as a conceptual clustering technique and its application for supporting the merging of ontologies; the efficient computation of association rules and the structuring of the results; and the visualization and management of conceptual hierarchies and ontologies including its application in an email management system.}, biburl = {http://www.bibsonomy.org/bibtex/23ad5183ad5e15d93898a798bd5063194/stumme}, keywords = {Conceptual concept knowledge 2003 OntologyHandbook myown analysis Knowledge formal Processing processing FCA habilitation conceptual discovery fca} } @inproceedings{stumme1998online, title = {On-Line Analytical Processing with Conceptual Information Systems.}, author = {G. Stumme}, booktitle = {Proc. 5th Intl. Conf. on Foundations of Data Organization (FODO'98)}, editor = {K. Tanaka and S. Ghandeharizadeh}, month = {November 12-13,}, pages = {117-126}, year = 1998, biburl = {http://www.bibsonomy.org/bibtex/21b6838b57badf34405213780371dd062/stumme}, keywords = {1998 OntologyHandbook FCA myown} } @book{Stumme00begriffliche, title = {Begriffliche Wissensverarbeitung--Methoden und Anwendungen}, author = {G. Stumme}, editor = {G. Stumme and R. Wille}, publisher = {Springer, Heidelberg}, year = 2000, biburl = {http://www.bibsonomy.org/bibtex/2d1b5aad86df06acac6ddd756dd7b8b60/stumme}, keywords = {OntologyHandbook FCA myown 2000} } @incollection{Stumme97, title = {Concept exploration - A tool for creating and exploring conceptual hierarchies}, author = {G. Stumme}, booktitle = {Conceptual structures : Fulfilling Peirce's dream}, editor = {D. Lukose and H. Delugach and M. Keeler and L. Searle and J. F. Sowa}, pages = {318--331}, publisher = {Springer-Verlag}, series = {Lecture Notes in Artificial Intelligence, Vol. 1257}, year = 1997, biburl = {http://www.bibsonomy.org/bibtex/22b76a80970db4955fea486544279a555/stumme}, keywords = {1997 OntologyHandbook FCA myown} } @inproceedings{hotho2006information, title = {Information Retrieval in Folksonomies: Search and Ranking}, address = {Heidelberg}, author = {Andreas Hotho and Robert J�schke and Christoph Schmitz and Gerd Stumme}, booktitle = {The Semantic Web: Research and Applications}, editor = {York Sure and John Domingue}, month = {June}, pages = {411-426}, publisher = {Springer}, series = {LNAI}, volume = 4011, year = 2006, biburl = {http://www.bibsonomy.org/bibtex/2b1e4dabc5b558aeea1b839a7f123eef1/stumme}, keywords = {information 2006 pagerank IR OntologyHandbook myown retrieval informationretrieval mimose FCA folksonomy folkrank ranking} }