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Research Area: Machine Learning |
Profile
Since October 2009, I am a researcher at Yahoo! Research in Barcelona. Prior to joining Yahoo!, I was a postdoc in the machine learning group at Technische Universität Berlin and worked for Max Planck Institute for Computer Science in Saarbrücken and at Humboldt-Universität zu Berlin. I received a Diploma in Computer Science in 2003 from Technische Universität Berlin and a Ph.D. (Dr. rer. nat.) in 2008 from Humboldt-Universität zu Berlin. I am interested in statistical machine learning and data mining. This includes learning from structured data, kernel methods, semi-supervised techniques, information extraction/retrieval, and applications in natural language processing and computational biology.
Recent Publications, Projects and News
- Document assignment in multi-site search engines U. Brefeld; B. B. Cambazoglu; F. P. Junqueira, Proceedings of the 4th International Conference on Web Search and Data Mining, 2011 [view abstract]
- lp-Norm Multiple Kernel Learning Marius Kloft; Ulf Brefeld; Soeren Sonnenburg; Alexander Zien, Journal of Machine Learning Research, 2011 [view abstract]
- Approximate Tree Kernels K. Rieck; T. Krueger; U. Brefeld; K.-R. Mueller, Journal of Machine Learning Research, 2010 [view abstract]
- Efficient and Accurate Lp-norm Multiple Kernel Learning M. Kloft; U. Brefeld; S. Sonnenburg; P. Laskov; K.-R. Müller; A. Zien, NIPS, 2009 [view abstract]