الملخص

Open Access PolicyTishreen University Journal is an open access journal, therefore there are no fees required for downloading any publication from the journal website by authors, readers and institutions. The journal applies the license of CC BY (a Creative Commons Attribution 4.0 International license). For more information please follow the link https://creativecommons.org/licenses/by/4.0/This license allows authors  to keep ownership f the copyright of their papers. But this license permits any user to download , print out, extract, reuse, archive, and distribute the article, so long as appropriate credit is given to the authors and the source of the work. The license ensures that the article will be available as widely as possible and that the article can be included in any scientific archive.