1. Associate Professor, Oregon State Univ., 101 Kearney Hall, Corvallis, OR 97331 (corresponding author).
2. Associate Professor, Lafayette College, 319 Acopian Engineering Center, Easton, PA 18042.
3. Associate Professor, Auburn Univ., 238 Harbert Engineering Center, Auburn, AL 36849.
4. Associate Professor, Gonzaga Univ., Herak 212, Spokane, WA 99203.