1. Senior Research Engineer, Emerging Technologies, Advanced Engineering, Volvo Construction Equipment, 112 Volvo Way, Shippensburg, PA 17257 (corresponding author).
2. Gerald Tuma Presidential Professor, School of Electrical and Computer Engineering, Univ. of Oklahoma, 110 W. Boyd St., DEH 432, Norman, OK 73019.
3. Associate Dean for Research and Graduate Programs, College of Engineering, David Ross Boyd Professor and Aaron Alexander Professor, School of Civil Engineering and Environmental Sciences, Univ. of Oklahoma, 202 W. Boyd St., CEC 107, Norman, OK 73019.