LDA IR

http://www.datalab.uci.edu/papers/fastLDA_2008.pdf said that http://www.datalab.uci.edu/papers/special_words_NIPS06.pdf and http://maroo.cs.umass.edu/pdf/IR-464.pdf have successfully applied the LDA model
to information retrieval and shown that it can significantly
outperform – in terms of precision-recall – alternative methods
such as latent semantic analysis.