1. Assistant Professor, Dept. of Civil and Mechanical Engineering, Alabama A and M Univ., 4900 Meridian St. North, Huntsville, AL 35762; formerly, Postdoctoral Research Associate, Dept. of Biological and Agricultural Engineering, Univ. of Idaho, 322 E. Front St., Boise, ID 83702.
2. Assistant Professor, Dept. of Biological and Agricultural Engineering, Univ. of Idaho, 322 E. Front St., Boise, ID 83702 (corresponding author).