Gezira Journal of Engineering and Applied Sciences is a refereed biannual journal published by Deanship of scientific Research, University of Gezira and was established in 2002. It aims at publishing reports of original research in all aspects of engineering and applied sciences in the areas of mathematics, computer, chemistry, physics and biotechnology. Articles will be accepted either in Arabic or English. Manuscripts submission can be electronic, by Email or paper. All rights reserved. No part of this publication may be produced, stored in a retrieval system or transmitted in any form or by any means, electronic photocopying, and recording or otherwise without permission in writing from the editor.