1. Postdoctoral Researcher, Swiss Competence Center for Energy Research, Eidgenössische Technische Hochschule Zürich, 8006 Zürich, Switzerland (corresponding author).
2. President, American Univ. of Armenia, Yerevan 0019, Armenia; Taisei Professor of Civil Engineering Emeritus, Dept. of Civil and Environmental Engineering, Univ. of California, Berkeley, CA 94720-1710.