1. Bridge Designer, Arizona Dept. of Transportation, 205 S. 17th Ave., Room 289E, Phoenix, AZ 85007; formerly, Graduate Research Assistant, Dept. of Civil Engineering and Engineering Mechanics, Univ. of Arizona, Tucson, AZ 85721.
2. Professor, Dept. of Civil Engineering and Engineering Mechanics, Univ. of Arizona, Tucson, AZ 85721.