Dr. Belle Tseng is the Senior Manager of the Audience Science group in Yahoo. She leads a R&D team of researchers with strong background in data mining and machine learning to improve the audience-facing properties at Yahoo. Belle received her B.S. and M.S. in Mathematics and Electrical Engineering from MIT, and her Ph.D. from Columbia University. Before joining Yahoo, Belle spent four years as a Senior Research Staff Member at NEC Laboratories America where she manages research projects on relational data mining and social network analysis. Prior to joining NEC, she spent seven years as a Research Staff Member at IBM T. J. Watson Research Center working on multimedia retrieval, personalization, and summarization. Dr. Tseng published over 100 technical papers, holds 8 US patents, and has more than 20 patents pending in the areas of web search, multimedia understanding, stereoscopic video system, and social information analysis. She serves on the Organizing Committees of ICME 2009, ICWSM 2008, ICDE 2008, and on several Technical Program Committees. She is a receipt of the NSF Fellowship, the IBM Invention Achievement Awards, and the NEC Technology Commercialization Award.