1. Research Assistant Department of Mechanical Engineering, Clemson University, 134 EIB, Clemson, SC 29634-0921 e-mail:
2. Research Assistant Department of Industrial Engineering, Clemson University, 104A Freeman Hall, Clemson, SC 29634 e-mail:
3. Professor Department of Mechanical Engineering, Clemson University, EIB 203, Clemson, SC 29634-0921 e-mail:
4. Associate Professor Department of Industrial Engineering, Clemson University, 104A Freeman Hall, Clemson, SC 29634 e-mail: