Abdelgadir, Abdelkarim Mohammed; Supervisor, - Nafie Abd Al-latif; CO - Supervisor, - Osman Mohammed Dafallah(sudan university of scince and technology, 2006-08-05)
Abd-Elgalil, Hysam Hassan; Supervisor, - Abdel rasoul Jabar Alzubidi
Co-Supervisor, - Ahmed sabah Elkher(sudan university of scince and technology, 2005-12-05)