Authors
Chao-Chan Wu
Department of Cooperative Economics, Feng Chia University, 100, Wen-Hwa Road, Seatwen, Taichung 40724, Taiwan
Ching-Bang Yao
Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Road, Taipei 106, Taiwan .
Department of Information Management, Chinese Culture University, 55, Hwa-Kang Road, Yang-Ming-Shan, Taipei 11114, Taiwan