1. Division of Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401 (corresponding author).
2. Professor, Division of Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401.
3. Associate Professor, Division of Engineering, Colorado School of Mines 1500 Illinois St., Golden, CO 80401.
4. Professor, Division of Engineering, Colorado School of Mines 1500 Illinois St., Golden, CO 80401.