1. Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
2. Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, QC H3A 0E9, Canada
3. Department of Mechanical Engineering, University of Colorado, 427 UCB, 1111 Engineering Dr., Boulder, Colorado 80309, United States
4. Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, QC H3A 0C5, Canada