presented in The First International Conference on Interdisciplinary Research and Development Theme: Interdisciplinary Approach to Research and DevelopmentOrganized by the Interdisciplinary Network of the Royal Institute of Thailand Under the Royal Patronage of HRH Princess Maha Chakri SirindhornSupported by Thailand Chapter of the Internet Society, Thailand Chapter of the Association for Computing Machinery, Thailand Chapter of the Computer Society of the IEEE,and The College of Internet Distance Education of Assumption University Sapphire Rooms, IMPACT Exhibition Center, Muang Thong Thani, Bangkok Metro, Thailand31 May - 1 June 2011