I work on machine learning and statistical data analysis. This includes application areas ranging from document analysis, bioinformatics, computer vision to the analysis of internet data. In my work I have supervised numerous PhD students and researchers and I have written over 200 papers, written one book and edited 5 books. My specialties are deep learning, kernel methods, unsupervised models, fast samplers, user models, etc. This includes highly scalable models which work on many TB of data and hundreds of millions of users.