Joseph HellersteinJoseph M. Hellerstein is an Assistant Professor of Computer Science at the University of California, Berkeley who earned his Ph.D. at the University of Wisconsin. His research interests include query processing, query optimization, indexing, ad active databases, especially as applied to object database systems and on-line data analysis. He is on the ACM SIGMOD advisory board and is an associate editor of the IEEE Data Engineering Bulletin. Read More Read Less