CHAO-CHUN CHEN1, DING-CHAU WANG2 AND YONG-MING HUANG3
1Department of Computer Science and Information Engineering
2Department of Information Management
3Department of Information and Communication
Southern Taiwan University
Tainan, 710 Taiwan
E-mail: {chencc, zh9}@mail.stut.edu.tw; m95f0213@webmail.stut.edu.tw