CHIN-I LEE1, TZONG-CHEN WU1,2, BO-YIN YANG2 AND WEN-GUEY TZENG3
1Department of Information Management
National Taiwan University of Science and Technology
Taipei, 106 Taiwan
2Institute of Information Science
Academia Sinica
Taipei, 115 Taiwan
3Department of Computer Science
National Chiao Tung University
Hsinchu, 300 Taiwan