this paper aims to assess the quality and accuracy aster dems and the arcgis alogorthms used for hydrologic analyses. to this end, first the plan of drainage networks in the region was extracted from aerial photographs and high resolution satellite images and was set as the real ground. in the next step, using the hydrology tool in arcgis software, raster networks of the region for the whole ca...

The rapid growth of modern long-distance communication technologiesboth in term of quality and quantity and the consequent emergenceof cyberspace in parallel with the real world, has led to new forms ofinequality which can be interpreted in three different ways. Using thethree-generation theory of social networks (Oral networks; Longdistancenetworks; and, Digital networks), one can make domesti...

a communication net is usually represented by a linear graph g whose branches represent channels for information flow and whose vertices represent sources, sinks and switching centers. the purpose of this paper is to show that for modeling digital communication nets, conventional use of the concepts of capacity and terminal capacity is inadequate . we will present an alternative to max-flow min...

Due to high speed computer networks, the use of digitally formatted data has increased many folds.The digital data can be duplicated and edited with great ease which has led to a need for effectivecopyright protection tools. Digital Watermarking is a technology of embedding watermark withintellectual property rights into images, videos, audios and other multimedia data by a certainalgorithm .Di...

political participation of citizens is an important political issue which affects the process of political development in each society. in the age of information revolution, information and communication technologies are penetrating all levels of societies and have catalyzed the process of development in every country and encourage many scholars to study how these technologies affect the social...

Contribution: A technical course in a multidisciplinary university program has to provide high-level skills, with limited lecturing hours and student background. This article investigates the principles for its design reports about study case. Background: The overall organization needs address specific learning targets teaching techniques, different from those used traditional courses on topic....