The desert areas of the playas are important due to the diversity of geomorphological landforms and the great potential for geo-tourism development. These areas can be provided using statistical and quantitative models to determine the areas with a higher geomorphological diversity value to land planners for the sustainable development. This research was conducted to evaluate the geomorphodiversity in Mesileh playas in Namak Lake and Hoz-e- Sultan region. The geomorphological landforms in this area were extracted using satellite images and field studies, Fragstats software and the eight quantitative indicators of the landscape metrics include Patch Richness Density, Relative Patch Richness, Simpsons Evenness Index, Index Shannon Evenness, Shannons Diversity Index, Simpson's Diversity Index, Modified Simpson's Diversity Index, Modified Sahanon Evenness Index were exerted to evaluate the richness of geomorphological units in Masileh playas. The results indicate that the geomorphological units of alluvial fans, salt flats, salt mud flats and dunes, respectively, have the highest value among the landscape metrics. In addition, from the point of view of the landscape metrics, the northwest regions of Kashan and Abuzeydabad have the most incredible variety of geomorphology. This research showed that geomorphological units could be used as a suitable indicator in evaluating the diversity of the landscape, especially in flat areas with morphometric and geological diversity.

The purpose of this study was to design educational content of Green Chemistry metrics for undergraduate chemistry students. Based on the purpose of the research, it was an applied-development type, and in terms of collecting and analyzing the data; a descriptive-analytical type is used. The statistical sample was a collection of books, articles, journals, and dissertations related to green chemistry which were selected and analyzed up to getting theoretical saturation. By reviewing related literature and investigating various sources on how to design the educational contents of the chemistry green, and also by directions of the field experts, during several revers phases of core coding, chapters were determined, then, according to the designated chapters, objectives were written for each topic in the target-content table. The results of this study showed that for the design of the content of training green chemistry measurements, two categories of mass measurements and environmental measurements can often be quantitatively evaluated in the twelve principles of green chemistry. In these two categories, there are various methods for assessing the greenness of a reaction (organic reaction synthesis) were identified, including atomic economy, reaction mass efficiency, material recovery parameter, environmental factor, process mass intensity, and effective mass efficiency are presented in a conceptual framework.

In this paper we consider some (a, b)- metrics such as generalized Kropina, Matsumoto and F=(a+b)2/a metrics, and obtain necessary and sufficient conditions for them to be Einstein metrics when b is a constant Killing form. Then we prove with this assumption that the mentioned Einstein metrics must be Riemannian or Ricci flat.

In this paper, we study the class of C 3-like Finsler metrics which contains the class of semi-C-reducible Finsler metric. We find a condition on C 3-like metrics under which the notions of Landsberg curvature and mean Landsberg curvature are equivalent.

In this paper, we study generalized Douglas-Weyl Finsler metrics. We find some conditions under which the class of generalized Douglas-Weyl (a, b)-metric with vanishing S-curvature reduce to the class of Berwald metrics.