 Li Meng is a visiting-student of Department of Mechanical Engineering at MIT. * Corresponding author, Email: [email protected]. ABSTRACT In a Solar Power Tower (SPT) system, the ideal shape of a heliostat concentrator is a section of paraboloid which is a function of the location in the array and the incidence sun angle. This shape is difficult to achieve and limits the system efficiency. A sh...

Iran's Islamic revolution had so many effects on political, social, cultural and economic conditions of Shiites outside of Iran and caused a special formation of Muslims identity beliefs in the world, especially shia Muslims. Islamic revolution was a turning point in the Saudi Shia movement to get their spoiled rights by governance structure in Saudi Arabia and helped Shia movements to revive a...

Iran's Islamic revolution had so many effects on political, social, cultural and economic conditions of Shiites outside of Iran and caused a special formation of Muslims identity beliefs in the world, especially Shia Muslims. Islamic revolution was a turning point in the Saudi Shia movement to get their spoiled rights by governance structure in Saudi Arabia and helped Shia movements to revive a...

The yield map is generated by fitting the yield surface shape of yield monitor data mainly using paraboloid cones on floating neighborhoods. Each yield map value is determined by the fit of such a cone on an elliptical neighborhood that is wider across the harvest tracks than it is along them. The coefficients of regression for modeling the paraboloid cones and the scale parameter are estimated...

ARTICLE HISTORY: Received 04 March 2015 Revised 22 March 2015 Accepted 22 March 2015 Studying Gaussian beam is a method to investigate laser beam propagation and ABCD matrix is a fast and simple method to simulate Gaussian beam propagation in different mediums. Of the ABCD matrices studied so far, reflection and refraction matrices at various surfaces have attracted a lot of researches. However...

this article is an inquiry into the causes of the failure of the iranian constitutional revolution of 1906 in achieving its aims and objectives, as the triumphant revolution faced many difficulties shortly after victory. in the period, iran was integrated into the international system, therefore, without noting international issues, understanding its internal developments cannot be possible. th...