-- Mohammed Awad Ahmed DAAD Ph.D. Full Award scholarship holder Institute of Geology and Geochmistry of Petroleum and Coal RWTH-Aachen University Lochnerstr. 4-20, Hause B 52056 Aachen Telephone:+49-0241-8095905 Handy: +49 -176 25466170 E-mail: awad4@daad-alumni.de