JEFFREY J. P. TSAI is Associate Professor in the Department of Electrical Engineering and Computer Science at the University of Illinois. YAODONG BI is Assistant Professor in the Department of Computing Sciences at the University of Scranton. STEVE J. H. YANG is Associate Professor in the Department of Computer Science and Information Engineering at National Central University in Taiwan. ROSS A. W. SMITH is a consultant with Configured Energy Systems and former assistant professor at the University of Illinois.