Corresponding Author

Paper:	idn511
Name:	H.J. Shin
Company:	Sungkyunkwan University
Address:	310 Chumchum-dong Chang-an-gu Suwon 440-764
Country:	South Korea
Phone:	0082 0331 290 7457
Fax:
Email:	hjshin@nature.skku.ac.kr