First Author:   Mahmood -ur- Rahman GSICS, Kobe University, Japan mahmood_gsics_ku@yahoo.com   Kobe University International Residence B501, 2-4-2, Minatojima-Nakamachi, Chuo-Ku, GSICS, Kobe University Kobe-Shi, 650-0046, Japan   8061402008(Phone) 8061402008(Fax) Second Author: Zakaria Zoundi GSICS, Kobe University, Japan zakariazoundi@yahoo.fr   2-1 Rokkodai, 2-1 Rokkodai, Nada Kobe, 657-8501, Japan   08038242662(Phone)