Proceedings of the 3rd international workshop on Search and mining user-generated contents

The International Workshop on Search and Mining User-generated Contents (SMUC) have evolved as one of the main multidisciplinary forums for researchers and practitioners who work on knowledge extraction, management and exploitation in Social Media, and belong to different, but complementary fields such as Web (content/structure/usage) mining, information retrieval, opinion mining and sentiment analysis, user modeling, personalization and recommendation, and multimedia processing and retrieval. Following the previous editions of SMUC workshop (at CAEPIA-TTIA 2009 and CIKM 2010), the 3rd edition of the workshop (SMUC 2011) was held in conjunction with the 20th ACM Conference on Information and Knowledge Management (CIKM 2011), in Glasgow (UK) on the 28th of October 2011. SMUC 2011 received a total of 17 submissions from which the program committee selected 11 for oral presentation, which represents an acceptance rate of 64.7%. In addition, it featured 3 keynote talks. They were given by David E. Losada, from Universidad de Santiago de Compostela (Spain), on "The challenge of understanding the flow of sentiments in social media documents", Joemon M. Jose, from University of Glasgow (UK), on "Information retrieval techniques for social media", and Martin Atzmüller, from University of Kassel (Germany), on "Analysis of communities in social media."