some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Purpose: Since information storage and retrieval is among fundamental tasks of libraries and information dissemination centers, finding proper software in this field is of high significance. The purpose of the present study is to evaluate web-based librarianship software Pars azarakhsh, Nosa, and Namayeh in information retrieval. Methodology: The present study is an applied one. Its methodolog...

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

even though, to date, a lot of studies have been conducted on the subject of politeness theory, there are very few studies regarding the applicability of this theory to translation between english and persian which shows the reason behind conducting the present study. this study was carried out with the aim of highlighting whether there is any difference between english and persian methods of u...

Man-made caves or troglodytic spaces are special kinds of architecture in which no materials are applied for creating the spaces and in turn they are created through decreasing the rocky mass in the ground and rock’s bed by human being. The Man-made caves or troglodytic spaces have been identified and introduced in different parts of the country so far. Maragheh County which is located in the n...

Columns are structural elements that transfer the vertical forces from beams and vaults. They have undergone major changes in terms of form in the course of time. The formal analysis of different parts of columns may reveal valuable geometric information about them. Recognizing the geometric forms of stone columns can be one of the proper strategies for restoring these valuable elements. The si...