Honggang Wang1, Ming C. Leu2 and Cemil Oz3
1Department of Industrial Engineering Purdue University
West Lafayette, IN 47907, U.S.A.
2Department of Mechanical and Aerospace Engineering
University of Missouri-Rolla
Rolla, MO 65409, U.S.A.
3Department of Computer Engineering
Sakarya University
54187 Sakarya, Turkey