First Author:   Hakan M. Berument Bilkent University berument@bilkent.edu.tr         Second Author: Zulal S Denaux Valdosta State University zsdenaux@valdosta.edu   Valdosta, 31602, USA   229-2191217(Phone) 229-2452238(Fax) Third Author: Yeliz Yalcin Gazi University yyeliz@gazi.edu.tr