Chih-Yung Tsai1*, Shuo-Yan Chou2 and Shih-Wei Lin3
1National Formosa University No. 64, Wen-Hua Road, Huwei City, 632 Yunlin, Taiwan, R. O. C.
2National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan, R. O. C.
3Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan Tao-Yuan, Taiwan 333, R. O. C.
Email: [email protected]