1. Postdoctoral Researcher, Faculty of Engineering, Univ. of Bologna, Via del Risorgimento 2, 40136 Bologna, Italy.
2. Associate Professor, Faculty of Engineering, DISTART, Univ. of Bologna, Via del Risorgimento 2, 40136 Bologna, Italy.
3. Professor, Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
4. Assistant Professor, Dept. of Environmental Sciences, Univ. of Virginia, Charlottesville, VA 22904-4123.