Login New user?   Water, Energy, Food and Environment An International Journal   WEFE Home   Aim and Scope   For Reviewers   For Authors   Editorial Board   Publication Ethics   Submit an Article   Content   Forthcoming Papers   Subscription Author     Name : Hamiden Abd El- Wahed Khalifa Address : 1Operations Research Department, Faculty of Graduate Studies for Statistical Research, Cairo, University, Giza, Egypt.2Present Address: Mathematics Department, College of Science and Arts, Al- Badaya, Qassim University, Saudi Arabia. Email : hamiden@cu.edu .eg Telephone :   Home   About us   News   Journals   Conferences Contact us Copyright naturalspublishing.com. All Rights Reserved