@conference {17883, title = {Active Proxy-G: Optimizing the query execution process in the Grid}, booktitle = {Proceedings of the 2002 ACM/IEEE conference on Supercomputing}, year = {2002}, month = {2002///}, pages = {1 - 15}, author = {Andrade,H. and Kurc, T. and Sussman, Alan and Saltz, J.} }