This paper presents a novel RF MEMS (Micro Electromechanical System) fixed-fixed switch for very fast switching. Using the obtained equations, the switching time depends on the stiffness and effective mass of the switch beam so that the switching time will be decreased by higher stiffness (spring constant) and lower effective mass. In new design, the suspension bridge is a three-layer beam so t...

Objective- Radiological and anatomical study of the Lacrimal apparatus system in one-humped camel of Iran (Camelus Dromedarius).Design- Prospective studyAnimals- Five heads (cut above the third cervical vertebra) of adult Dromedary camels' cadavers were collected from the slaughterhouse of the Najafabad area of Isfahan Province, Iran. Procedures- The anatomy of the nasolacrimal duct of one- hum...

purpose: this study aims to investigate influencial factors on accepting audio archive by radio program makers of irib in north west of  iran. methodology: this research is based on davis’ technology acceptance model which has been done via analytical survey method. the population of this research are 100 radio program makers in north west of iran who are from uramia, tabriz, ardabil, zanjan, q...

The fast growth of the wireless communication industry poses severe limitations on radio astronomical observations. Two such examples are the Iridium system which will probably cause problems within bands reserved to radio astronomy and the GSM system which became ubiquitous and thus prevents observation in its band. In this paper we present the results of blanking of interfering signals measur...

Interference and delay are considered as the major reasons limiting the capacity and increasing the new call blocking probability in cellular system. In this paper we introduce a novel strategy based on cognitive radio. Cognitive radio is defined as a radio or system that senses its environment and can dynamically and autonomously change its transmitter parameters based on interaction with the ...

Recently many plants' pipes and drains became old and many robots to inspect these pipes were developed in the past. Wired robots were put to practical use, but they had a heavy power supply and a signal wire. Therefore, new inspection robots using wireless radio communication system are considered useful for long complex pipes and long distance pipes including straight, vertical and bend line....

background and objectives: there are different types of vascular access. we compared the patency rate for six months in ulnar-basilic fistula and radio-cephalic fistula for vascular access in hemodialysis patients.   methods: the study was performed on 60 patients of 50.6±13.5 years of age with end-stage renal failure undergoing hemodialysis from 2012-2014 in imam ali hospital in zahedan. patie...

in this paper, a new propagation model based on utd for multiple diffraction paths in cellular mobile radio communications in urban environments is proposed. moreover, the most rigorous novel utd-based expressions for multiple diffractions by buildings and excess path losses are d - rived and analyzed. for this purpose, building rows are supposed to have rectangular cross-sections with the same...

XM radio service is an emerging satellite digital audio radio service suitable for automotive environment, it offers users high-quality radio programs with better signal coverage by adopting communication satellite broadcasting technology. In order to incorporate XM radio function into a digital car audio system based on the embedded system industry standard ITRON, we analyze both software and ...