Vincent K.N. Lau, PhD, is Associate Professor in the Department of Electrical Engineering at the Hong Kong University of Science and Technology.  He is also a technology consultant and senior manager of ASTRI, leading the Advanced Technology Team of the Wireless Access Group in wireless LAN systems.  Additionally, Dr. Lau was the chief technical officer and co-founder of DAX Group Ltd.  He is a Senior IEEE Member, has published more than 42 papers in IEEE Transactions and journals, and has received two best paper awards (IEE and HKIE). Dr. Lau's current research focus is on the cross layer optimization between the wireless MAC (scheduling) layer and adaptive physical layer. Yu-Kwong Ricky Kwok, PhD, is Associate Professor in the Department of Electrical and Electronic Engineering at the University of Hong Kong. He holds additional positions including Program Director of the Master of Science and Director of the High Performance Computing Research Laboratory.  A Senior Member of the IEEE, he has published more than 130 technical papers in various leading journals, research books, and refereed international conference proceedings on topics including parallel and distributed computing research, mobile computing, wireless networking, grid computing infrastructure technologies, and analysis of distributed algorithms.