1. Department of Library and Information Science, Fu Jen Catholic University, N510 Jhongjheng Rd., Sinjhuang City, Taipei County 24205, Taiwan, R.O.C.
2. Department of Photonics and Communication Engineering, Asia University, No. 500, Lioufeng Raod, Wufeng Shiang, Taichung, Taiwan, R. O. C.
3. Department of Information Management, Tainan University of Technology, 529 Jhong Jheng Road, Yongkang, 710 Tainan, Taiwan, R.O.C.