1. Department of Civil and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
2. Department of Civil, Environmental, and Geo-Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
3. Department of Civil and Environmental Engineering, University of Toledo, Toledo, Ohio 43606-339, United States
4. BioTechnology Institute, University of Minnesota, St. Paul, Minnesota 55108, United States
5. Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway