Yu-Pap Tsai1,3, Ching-Che Kao1,2, Yi-Ping Hung1,2
and Zen_Chung Shih3
1Institute of Information Science
Academia Sinica
Taipei, 115 Taiwan
2Department of Computer Science and Information Engineering
National Taiwan University
Taipei, 106 Taiwan
E-mail: hung@csie.ntu.edu.tw
3Department of Computer and Information Science
National Chiao Tung University
Hsinchu, 300 Taiwan