Ali Sharafi Chegeni, Behrouz Ezatpour*, Mohammad Saki, Hamid Mokhayeri, Siavash Adavi, Elham Nasiri, Mehdi Azami Department of Communicable Disease Control and Prevention, Deputy of Health, Lorestan University of Medical Sciences, Khorramabad, Iran Razi Herbal Medicines Research Center, Lorestan University of Medical Science, Khorramabad, Iran Aligoudarz health network, Lorestan University of M...

This paper surveys experimental and empirical evidence which demonstrates that users of full service networks will not be happy with less than TV quality images, especially for personal communication. The paper briefly examines the technical consequences of these findings, and the implications for mature broadcast networks looking towards new service opportunities. The conclusions of this paper...

In this paper, a logical three-layer design of Iran data network is presented using the hierarchical model. The results show that by applying the static routing approach to Iran data network, the topology of the network is changed when parameters of the initial configuration vary. In other words, using the static routing may not properly direct the data packets. Consequently, performance of the...

Previous studies have shown the unprecedented absolute pixel localization accuracy of the German SAR (Synthetic Aperture Radar) satellites TerraSAR-X and TanDEM-X. Now, by thoroughly correcting the atmospheric signal path delays and geodynamic effects like tides, loadings and plate movements, range accuracies of about 1 centimeter are demonstrated to be attainable. While Global Navigation Satel...

We present a general modeling scheme for investigating the possibility of photosynthesis-based life on extrasolar planets. The scheme focuses on the identification of the habitable zone in main-sequence-star planetary systems with planets of Earth mass and size. Our definition of habitability is based on the long-term possibility of photosynthetic biomass production as a function of mean planet...

[1] A constraint on the rheology of oceanic mantle is derived on the basis of a recently established scaling law for the onset of convection with temperature-dependent viscosity. Our approach is free from the assumption of statistically steady-state convection, which has commonly been employed in previous studies. The estimated range of asthenospheric viscosity is 1–4 10 Pa s if the activation ...