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 - Ślęzak, Dominik; Kim, Tai-hoon; Ma, Jianhua; Fang, Wai-Chi; Sandnes, Frode Eika; Kang, Byeong-Ho; Gu, Bongen (Springer Berlin Heidelberg, 2009)