WON Y. YANG, PhD, is Professor of Electrical Engineering at Chung-Ang University, Korea. WENWU CAO, PhD, is Professor of Mathematics and Materials Science at The Pennsylvania State University. TAE-SANG CHUNG, PhD, is Professor of Electrical Engineering at Chung-Ang University, Korea. JOHN MORRIS, PhD, is Associate Professor of Computer Science and Electrical and Computer Engineering at The University of Auckland, New Zealand.