نتایج جستجو برای: material evaluation
تعداد نتایج: 1163396 فیلتر نتایج به سال:
the synthesis of nano- structured cobalt through a controlled chemical process followed by heat treating at various temperatures is studied. the product is characterized by icp, xrd, fesem , and tem, indicating that the as- synthesized particles have an amorphous structure with 1.76 for co/b ratio, an average size of 50 nm. the transformation of intermediate phases into single phase nano- cryst...
The gelatin/gum Arabic microcapsules encapsulating peppermint oil were prepared by complex coacervation using tannic acid as hardening agent. The effects of various parameters, including concentration of wall material, core material, tannic acid and tween80 were investigated on particle size and encapsulation efficiency. For statistical evaluation of the parameters, Taguchi method has been used...
Background and objective: Teacher evaluation by students has been done for a long time. This study was conducted to learn more about students ' views. Material and Methods : This is a descriptive-analytical study which was carried out at Zanjan Medical Sciences University. 250 students were selected in each faculty and questionnaires were distributed among them. Later,...
the purpose of this study was to examine the status of supervision on departments’ heads at ferdowsi university of mashhad (fum) and realize some applied themes to provide a fit model for supervising departments’ heads in fum. the method was case study under a research category aimed for applied one. using purposive sampling, interviews were conducted with top fum managers, head departments, an...
Abstract The present study aims to evaluate EFL course contents used in language schools and institutes in Teh-ran. To that end, 230 participants in Tehran were conveniently sampled. At the outset of the study, two questionnaires were given to all groups, and according to their responses, the data were analyzed. Each of the questionnaires was given to participants individually. Each group ...
Background and Objective: Pain and sickness are undeniable facts in the material life. This study was aimed to evaluate Imam Sadjad's points of view about sickness. We would like to know if sickness can be an enjoyable or disgusting phenomenon. Materials and Methods: With respect to the objectives of our study, research material comprised of Imam Sadjad trainings and Sahife Sajadieh worships...
A solution to the single level Shockley-Read-Hall rate equations developed recently is applied to two multiple level systems. The two systems considered are the multiple discrete level system and the ground excited state or coupled level system. It is shown that the solution to the differential rate equations for the two multiple level systems derived without an approximation lead to a consiste...
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