1. Ph.D. Candidate, Dept. of Mechanical Engineering, Univ. of Minnesota, Minneapolis, MN 55455, US, e-mail: sing0550@umn.edu
2. Research Assistant Professor, Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, Univ. of Minnesota, Minneapolis, MN 55455, US.
3. Professor and Director, Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, Univ. of Minnesota, Minneapolis, MN 55455, US.
4. Professor and Associate Head, Dept. of Mechanical Engineering, Univ. of Minnesota, Minneapolis, MN 55455, US.