1. Assistant Professor, Dept. of Biological Systems Engineering, Univ. of Nebraska-Lincoln, 234 L.W. Chase Hall, Lincoln, NE 68583-0726.
2. Assistant Professor, Dept. of Agricultural and Biological Engineering, Univ. of Florida, 107 Frazier Rogers Hall, P.O. Box 110570, Gainesville, FL 32611.
3. Assistant Professor, Civil Engineering Dept., Univ. of New Hampshire, 240 Environmental Tech. Building, Durham, NH 03824.