1. Assoc. Prof. Dr. Abdul Nasir B. Matori Department of Civil Eng. Universiti Teknologi PETRONAS, Ser Iskandar, 31750 Tronoh, Perak Darul Ridzuan, Malaysia

Tel: Office: +6053687291

H.P: +60124371617

E-mail: nasrat@petronas.com.my

2. Assoc.Prof. Dr. El Kamil H. Tola Precision Agriculture Research Chair (PARC), King Saud University, Saudi Arabia.

Tel: Office: +966530290846

E-mail: etola@ksu.edu.sa

3. Assoc. Prof. Abdelmotalab F. kheiralla Vice Dean, Faculty of Engineering, University of Khartoum, Sudan

Tel: +249-923212871

E-mail: Kheiralla65@yahoo.com

4. Prof. Gamal M. Abdo Department of Civil Engineering, Faculty of Engineering, University of Khartoum

Tel: 00249 122 12 38 25

Fax: 00249 38 77 96 04

Email:gabdo2000@yahoo.com