We have released over a million images onto Flickr Commons for anyone to use, remix and repurpose. These images were taken from the pages of 17th, 18th and 19th century books digitised by Microsoft who then generously gifted the scanned images to us, allowing us to release them back into...
Mahout currently has
Collaborative Filtering
User and Item based recommenders
K-Means, Fuzzy K-Means clustering
Mean Shift clustering
Dirichlet process clustering
Latent Dirichlet Allocation
Singular value decomposition
Parallel Frequent Pattern mining
Complementary Naive Bayes classifier
Random forest decision tree based classifier
High performance java collections (previously colt collections)
A vibrant community
and many more cool stuff to come by this summer thanks to Google summer of code
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W. Martins, M. Goncalves, A. Laender, and G. Pappa. Proceedings of the 9th ACM/IEEE-CS Joint Conference on Digital Libraries, page 193--202. New York, NY, USA, ACM, (2009)
P. O'Brien, D. Carral, J. Mixter, and P. Hitzler. Proceedings of the 6th Workshop on Ontology and Semantic Web Patterns (WOP 2015) co-located with the 14th International Semantic Web Conference (ISWC 2015), Bethlehem, Pensylvania, USA., volume 1461 of CEUR Workshop Proceedings, CEUR-WS.org, (October 2015)