Thorsten Joachims is a Professor in the Department of Computer Science and in the Department of Information Science at Cornell University. He joined Cornell in 2001 after finishing his Ph. D. as a student of Prof. Morik at the AI-unit of the University of Dortmund, from where he also received a Diplom in Computer Science in 1997. Between 2000 and 2001 he worked as a PostDoc at the GMD in the Knowledge Discovery Team of the Institute for Autonomous Intelligent Systems. From 1994 to 1996 he spent one and a half years at Carnegie Mellon University as a visiting scholar of Prof. Tom Mitchell. Working with his students and collaborators, his papers won 7 Best Paper Awards and 3 Test-of-Time Awards. Thorsten Joachims is an ACM Fellow, AAAI Fellow, and Humboldt Fellow.