First Author:   Jennjou Chen National Chengchi University jennjou@nccu.edu.tw   Wenshan District Taipei City, 11605, Taiwan   886-2-2939-3091(Phone) 886-2-2939-3091(Fax) Second Author: Tsui-Fang Lin National Taipei University tflin@gm.ntpu.edu.tw   San Shia District, 151 University Road New Taipei City, 23741, Taiwan   886-2-8674-1111(Phone)