1. M.A.Sc. Candidate, School of Engineering, Univ. of British Columbia, 1137 Alumni Ave., EME 3211, Kelowna, BC V1V 1V7, Canada.
2. Associate Professor, School of Engineering, Univ. of British Columbia, 1137 Alumni Ave., EME 4225, Kelowna, BC V1V 1V7, Canada (corresponding author).