1. Assistant Research Professor, Earthquake Engineering Research Center, Univ. of Iceland, Austurvegur 2A, IS-800 Selfoss, Iceland.formerly, Adjunct Professor, Dept. of Environmental and Civil Eng., Faculty of Eng. and Natural Sciences, Univ. of Iceland, Austurvegur 2A, IS-800 Selfoss, Iceland.
2. Assistant Professor, Dept. of Civil Eng., The Catholic University of America, Washington, DC 20064.
3. Professor, Dept. of Civil Eng., Univ. of Patras, Patras 26500, Greece.