1. Department of Computer Engineering, Konkuk University, Chungju, Chungbuk 380-701, Republic of Korea
2. Division of Industry Development, Korea Internet & Security Agency, Seoul 138-950, Republic of Korea
3. Division of Constitutional Medicine Research, Korea Institute of Oriental Medicine, Deajeon 305-811, Republic of Korea
4. Division of Technology and Science, BNU-HKBU United International College, Zhuhai, Guangdong 519085, China