1 - International Conference on Mechanical Engineering Advanced Technology For Industrial Production (MEATIP4), Assiut University, Assiut, Egypt, Dec. 2006.

2 - The 2nd international conference on control, robotics, and informatics (ICCRI 2013), Kuala Lumpur, Malaysia, Dec. 2013.

3 - 8th Vienna International Conference on Mathematical Modelling (MATHMOOD 2015), Vienna University of technology, Vienna, Austria, Feb. 2015.

4 - Malaysian International Tribology Conference (MITC 2015), Penang, Malaysia, Nov. 2015.