Balby Marinho, L.; Hotho, A.; Jäschke, R.; Nanopoulos, A.; Rendle, S.; Schmidt-Thieme, L.; Stumme, G. & Symeonidis, P.: Recommender Systems for Social Tagging Systems. Springer, 2012SpringerBriefs in Electrical and Computer Engineering
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Jäschke, R.; Hotho, A.; Mitzlaff, F. & Stumme, G.: Challenges in Tag Recommendations for Collaborative Tagging Systems. In: Pazos Arias, J. J.; Fernández Vilas, A. & Díaz Redondo, R. P. (Hrsg.): Recommender Systems for the Social Web. Berlin/Heidelberg: Springer, 2012 (Intelligent Systems Reference Library 32), S. 65-87
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Krause, B.; Hotho, A. & Stumme, G.: A Comparison of Social Bookmarking with Traditional Search. In: Macdonald, C.; Ounis, I.; Plachouras, V.; Ruthven, I. & White, R. W. (Hrsg.): Advances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008. Heidelberg: Springer, 2008 (LNAI 4956), S. 101-113

n 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.

ur 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
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
trieval, and that the correlation is high in particular for the domains that are well covered by the social bookmarking system.

Krause, B.; Jäschke, R.; Hotho, A. & Stumme, G.: Logsonomy - Social Information Retrieval with Logdata. HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia. New York, NY, USA: ACM, 2008, S. 157-166
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Krause, B.; Schmitz, C.; Hotho, A. & Stumme, G.: The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems. Proc. of the Fourth International Workshop on Adversarial Information Retrieval on the Web. 2008
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Grahl, M.; Hotho, A. & Stumme, G.: Conceptual Clustering of Social Bookmark Sites. In: Hinneburg, A. (Hrsg.): Workshop Proceedings of Lernen - Wissensentdeckung - Adaptivität (LWA 2007). Martin-Luther-Universität Halle-Wittenberg, 2007, S. 50-54
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Grahl, M.; Hotho, A. & Stumme, G.: Conceptual Clustering of Social Bookmarking Sites. 7th International Conference on Knowledge Management (I-KNOW '07). Graz, Austria: Know-Center, 2007, S. 356-364

Jaeschke, R.; Marinho, L.; Hotho, A.; Schmidt-Thieme, L. & Stumme, G.: Tag Recommendations in Folksonomies. In: Hinneburg, A. (Hrsg.): Workshop Proceedings of Lernen - Wissensentdeckung - Adaptivität (LWA 2007). Martin-Luther-Universität Halle-Wittenberg, 2007, S. 13-20
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Jäschke, R.; Hotho, A.; Schmitz, C. & Stumme, G.: Analysis of the Publication Sharing Behaviour in BibSonomy. In: Priss, U.; Polovina, S. & Hill, R. (Hrsg.): Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007). Berlin, Heidelberg: Springer-Verlag, 2007 (Lecture Notes in Artificial Intelligence 4604), S. 283-295

Hotho, A.; Jäschke, R.; Schmitz, C. & Stumme, G.: BibSonomy: A Social Bookmark and Publication Sharing System. In: de Moor, A.; Polovina, S. & Delugach, H. (Hrsg.): Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures. Aalborg: Aalborg Universitetsforlag, 2006, S. 87-102
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