there is no doubt that human being needs to become integrated with industry and industry needs to be progressed, daily. on the other hand, serious events in industrial units specially in oil industries has been shown that such damages and events are industry related ones. the consequence of such events and damages which resulted in chemical and poisoned explosions and loss of life and property ...

in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...

Abstract. The dramatic growth of urbanization with the expansion of cities in terms of size and population has led to the creation of a variety of administrative structures to provide different types of administrative services and combinations. And bureaucratic and social mismatches cause corruption and unequal distribution of income and class fault. The main purpose of this study is to invest...

among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...

Objectives: The aging of the population in recent years in Iran has raised concerns among policymakers in various fields. Some economic theories consider the changes in the age structure and population aging as one of the important issues affecting the income inequality of societies. This study aims to assess the effect of population aging on the income inequality in Iran. Methods & Materials:...

Nowadays violence can be widely observed in many societies and one of these cases is domestic violence, the effect of which can be seen both on individuals and the society as a whole. If domestic violence persists it can result in divorce and in the long run may even result in murder, the effect of which both on the individual and the society is obvious. Disorder, homelessness and orphaned chil...

the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...