nowadays, social networks play a key role in the study of sociology, socialpsychology and sociology. social network facebook has turned into a virtualsystem covering more than 900 million people around the world. in islamicrevolution of iran as a world revolution, universal definition, it can use as anew possibility. this paper will identify the capabilities and challenges withusing facebook. p...

Reference 1] Pavel Krsek, Tomm a s Pajdla, and VV aclav Hlavv a c. Estimation of differential structures on triangulated surfaces. Abstract: This paper presents a method for extracting diierential structures on 3D surfaces and describes an algorithm for estimation of principal curvatures and principal directions from 3D scanned data. The method serves as a base for the extracting intrinsic curv...

Ruled surface design and its applications are widely used in CAGD (Computer Aided Geometric Design) and industrial areas. The hyperbolic paraboloid, the cylinder, the cone, and the hyperboloid are ruled surfaces with particular shapes. In this paper, dual space drawing methods for these particular ruled surfaces are proposed. The underlying principles of these methods are the applications, exte...

This paper deals with yield mapping on the basis of monitor yield data. Every value of the yield map is determined by fitting paraboloid yield surface textures on floating neighbourhoods, but in a robust way so that the influence of outliers is bounded or completely annihilated. The neighbourhood used for fitting the paraboloid cone looks like a huge butterfly flying along the harvest track. In...

A Particle Swarm Optimization Toolbox (PSOt) for use with the Matlab scientific programming environment has been developed. PSO is introduced briefly and then the use of the toolbox is explained with some examples. A link to downloadable code is provided. I. GENERAL INFORMATION A. Particle Swarm Optimization Toolbox (PSOt), Summary of Included Files Main files: 1) PSO – finds min/max of arbitra...

the islamic revolution helped develop a new discourse and semantic system. one of the methods to study or analyze the political phenomena is critical discourse analysis namely, that of laclau and mouffe›s discourse, the most pertinent. this article examines its main question whether the values of the islamic revolution concepts and identity are constructed, spread and articulated according to l...