1. Engineer, FYRA Engineering, 3925 S, 147th St., Suite No. 117, Omaha, NE 68114.
2. Professor, Dept. of Civil Engineering, Univ. of Nebraska-Lincoln, 205D, PKI, 1110 S, 67th St., Omaha, NE 68106 (corresponding author).
3. Associate Professor, Dept. of Civil Engineering, Univ. of Nebraska-Lincoln, 1110 S, 67th St., Omaha, NE 68106.
4. Assistant Professor, Dept. of Chemistry, Univ. of Nebraska at Omaha, 6001 Dodge St., Omaha, NE 68182.