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Article 15, Publication date: October 2011
Latent Subject-Centered Modeling of Collaborative Tagging: An Application in Social Search JING PENG, Chinese Academy of Sciences DANIEL D. ZENG, Chinese Academy of Sciences and University of Arizona ZAN HUANG, The Pennsylvania State University Collaborative tagging or social bookmarking is a main component of Web 2.0 systems and has been widely recognized as one of the key technologies underpinning next-generation knowledge management platforms. In this article, we propose a subject-centered model of collaborative tagging to account for the ternary cooccurrences involving users, items, and tags in such systems. Extending the well-established probabilistic latent semantic analysis theory for knowledge representation, our model maps the user, item, and tag entities into a common latent subject space that captures the wisdom of the crowd resulted from the collaborative tagging process. To put this model into action, we have developed a novel way to estimate the probabilistic subject-centered model approximately in a highly ef cient manner taking advantage of a matrix factorization method. Our empirical evaluation shows that our proposed approach delivers substantial performance improvement on the knowledge resource recommendation task over the state-of-the-art standard and tag-aware resource recommendation algorithms. Categories and Subject Descriptors: H.3.3 [Information Storage and Retrieval]: Information Search
ACM Transactions on Management Information Systems (TMIS) – Association for Computing Machinery
Published: Oct 1, 2011
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