Sharif Digital Repository

In a coherent pulse Doppler radar, ambiguity can occur in both range and radial velocity measurements. PRF staggering has been considered as one of the most effective ways by which these consequential blind speeds can be eliminated. As it stands the optimization of such staggering has not been convincingly provided in a clear format in past studies. In this article previously reported techniques have been studied and also a comprehensive simulation tool which provides interesting results based on different techniques is developed. Furthermore a comparison of various common staggering methods has been given and a cost function has been proposed to describe a figure of merit for each of the... 

The necessity of the development of ICT in rural areas has become a major issue in the developing countries for some time now. Iran, one of the participants of this movement, plans to take some significant short-term steps in this field, steps which will revolve the situation of it's rural ICT extensively. One of the main related issues in Iran is the large number of geographical situations present in rural parts demanding distinct telecommunication solutions. Having studied thoroughly the current situation of rural telecommunication in Iran and also the available and the newly introduced technical solutions, in this article we propose a complete telecommunication plan for rural Iran that... 

The morphological characteristics and electronic structure of the BaTiO 3 films grown by pulsed-laser deposition technique have been investigated. AFM and FE-SEM images reveal columnar growth characteristic of these films. Utilizing spectrophotometer, optical band gap of the films were reckoned to be about 3.76 eV. Both dα/dE and PL vs. E plots reveal numerous luminance states in the gap. Despite the presence of many luminance faults in the gap, cations manage to preserve their electronic states  

Blood oxygenation is the main performance characteristic of capillary membrane oxygenators (CMOs). Handling of natural blood in in vitro investigations of CMOs is quite complex and time-consuming. Since the conventional blood analog fluids (e.g. water/glycerol) lack a substance with an affinity to capture oxygen comparable to hemoglobin's affinity, in this study a novel approach using modified sulfite solution is proposed to address this challenge. The solution comprises sodium sulfite as a component, simulating the role of hemoglobin in blood oxygenation. This approach is validated by OTR (oxygen transfer rate) measured using native porcine blood, in two types of commercially available...