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2012 Volume 15 Issue 3-4

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Guest editorial: Special issue on information retrieval for social media
Fei Wang | Peng Cui | Gordon Sun | Tat-Seng Chua | Shiqiang Yang

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#nowplaying Madonna: a large-scale evaluation on estimating similarities between music artists and between movies from microblogs
Markus Schedl

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Improving search via personalized query expansion using social media
Dong Zhou | Séamus Lawless | Vincent Wade

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Credibility-inspired ranking for blog post retrieval
Wouter Weerkamp | Maarten de Rijke

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Recommending Flickr groups with social topic model
Jingdong Wang | Zhe Zhao | Jiazhen Zhou | Hao Wang | Bin Cui | Guojun Qi

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A deniable and efficient question and answer service over ad hoc social networks
Simon Fleming | Dan Chalmers | Ian Wakeman

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Finding similar questions in collaborative question answering archives: toward bootstrapping-based equivalent pattern learning
Tianyong Hao | Eugene Agichtein

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Conversation retrieval for microblogging sites
Matteo Magnani | Danilo Montesi | Luca Rossi

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Sentiment detection with auxiliary data
Dan Zhang | Luo Si | Vernon Rego

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Gateway finder in large graphs: problem definitions and fast solutions
Hanghang Tong | Spiros Papadimitriou | Christos Faloutsos | Philip S. Yu | Tina Eliassi-Rad