1. Department of Computer Science, National Chiao Tung University, Hsinchu, Taiwan, Province of China
2. Department of Electrical Engineering, National Chiao Tung University, Hsinchu, Taiwan Australia
3. Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, Australia
4. Department of Electrical Engineering, National Chiao Tung University, Hsinchu, Taiwan, Province of China
5. School of Computing, National University of Singapore, Singapore
6. Faculty of Computing, Universiti Teknologi Malaysia, Skudai Johor, Malaysia