Yujin Nam, PhD Professor Department of Architectural Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea Tel. +82-51-510-7652 Fax. +82-51-514-2230 Home Page: http://bees.pusan.ac.kr/ E-mail: namyujin@pusan.ac.kr