Purpose: In this research, we aim to identify differences in important characteristics of the web portals of the Iran Public Libraries Foundation (IPLF) and Art and Cultural Organization of Tehran Municipality (ACOTM) according to the assessment criteria that extracted and formulated by researchers. Methodology: We used descriptive survey method. Participants include 646 librarians of IPLF and...

Desertification phenomenon is not devoted to an especial climate, although its role in arid and semi-arid areas is clearer than other regions. In this research, four criterions of the wind erosion, soil, vegetation cover and climate have been considered for evaluating desertification potential and mapping of desertification intensity using to IMDPA model in ZAHAK Sistan region. Considering to e...