U- and E-Service, Science and Technology : International Conference, UNESST 2009, Held as Part of the Future Generation Information Technology Conference, FGIT 2009, Jeju Island, Korea, December 10-12, 2009, Proceedings - Dominik .l.zak, Tai-hoon Kim, Jianhua Ma, Wai-Chi Fang, Frode Eika Sandnes, Byeong-Ho Kang, Bongen Gu ((Communications in Computer and Information Science))