1. Mechanical and Industrial Engineering Department, The University of Minnesota Duluth, 1305 Ordean Court, VKH 105, Duluth, MN 55805
2. Department of Mechanical Engineering, Northern Arizona University, P.O. Box 15600, Flagstaff, AZ 86011
3. Mechanical, Industrial and Manufacturing Engineering Department, The University of Toledo, 2801 West Bancroft Street, Mailstop 312, Toledo, OH 43606