ibyan Journal of Engineering Science and Technology (LJEST) is a peer reviewed journal publishing high quality articles dedicated to all aspects of engineering. The Journal considers only manuscripts that have not been published (or submitted simultaneously), at any language, elsewhere. Contributions are in English. The Journal is published by Bright Star University, El-Brega, Libya. All articles published in LJEST is copyright referred to the publisher(Bright Star University, El-Brega, Libya).