Corresponding Author

Paper:	idn473
Name:	Oh-Yang Kwon
Company:	Inha University Dept. of Mechanical Engr.
Address:	253 Yonghyun-dong Inchon 402-751
Country:	South Korea
Phone:	+82 32 860 7324
Fax:	+82 32 868 1716
Email:	okwon@dragon.inha.ac.kr