in iran, new centralization characteristic, especially during pahlavi dynasty, has been convergence and its vast use in bureaucracy. historical sociological studies have consensus on the issues of centralization, power centralization, and political sovereignty in iran; however, these issues have some divisional interruptions and different levels of strength in some parts of the history. this es...

This paper focuses on methods of rendering shadows cast by point light sources. The goal is to summarize advantages and disadvantages of methods based on shadow mapping. We compare the traditional approach that exploits cube maps with the Dual–Paraboloid mapping. All of the methods are implemented on the latest hardware and they exploit capabilities of current GPUs. We also implemented optimiza...

In the said treatise Archimedes determines the equilibrium positions of a floating paraboloid segment, but only in the case when the basis of the segment is either completely outside of the fluid or completely submerged. Here we give a mathematical model for the remaining case, i.e., two simple conditions which describe the equilibria in closed form. We provide tools for finding all equilibria ...

A design methodology for collapsible rib-tensioned surface (CRTS) reflectors is presented. Offset configurations are explicitly addressed. For a reflector with aperture of 10 m diameter and focal length of 7.8 m, a root-mean-square surface accuracy of about 2 mm is achievable; this result scales linearly with the diameter. The design of a 1.5 m diameter prototype is presented, and the accuracy ...

Ultra-high concentrator photovoltaics (UHCPV), with concentrations higher than 1000 suns, have been pointed out by different authors as having great potential for being a cost-effective PV technology. This Letter presents a UHCPV Cassegrain-based optical design in which the sunrays are concentrated and sent from four different and independent paraboloid-hyperboloid pairs optical units onto a si...

religion, as a social phenomenon, affects society and is affected by it interactively. in iran, basically with religious norms and laws, many scholars and researchers concern with religion and level of religiosity. the paper is a comparative analysis of level of religiosity based on glynn and stark’s dimensions of religiosity, in three different generations in sari city: first generation (pre-r...

there were pivotal elements in 1978's islamic revolution of iran playing such roles which led to the derogation of pahlavi government on one hand, and set the scene for evolution and revolutionary movement in different classes of iranians, on the other. recognizing and studying these factors and discovering their interactional and organic relationship as well as gaining their framework, ru...

The present article studies and analyses plan and planning in Iran with respect to parameters of the idea of formation, birth, objectives, strategy and its functioning. Iran has half-a-century record of planning, and has implemented 7 constructional and developmental plans so far (5 plans before and 2 plans after the Revolution). Right now, Iran is implementing her third developmental plan. Two...