نتایج جستجو برای: electro magnetic waves cell phone

تعداد نتایج: 2159331  

In this research, analysis of nonlocal magneto-electro-thermo-elastic of a functionally graded nanobeamdue to magneto-electro-elastic loads has been done. In order to formulate the problem the Timoshenko theory of beams is utilized. The principle of virtual work, Hamilton’s principle as well as nonlocal magneto-electro-thermo-elastic relations has been recruited to derive the governing eq...

2016
Ernest Dore

"jwould be impossible to deal exhaustively with a comprehensive subject as that indicated by 6 ^le of this paper, I propose to discuss some general con.siderations first, and then refer to the cutaneous ctions to which, in my experience, one or other ?r?up of radiations are especially adapted for treatment. ^v?uld remind you that we have the choice of a long ' ?ale of electro-magnetic vibration...

2017
Daniel-André Duecker Andreas Rene Geist Michael Hengeler Edwin Kreuzer Marc-André Pick Viktor Rausch Eugen Solowjow

Self-localization is one of the most challenging problems for deploying micro autonomous underwater vehicles ( μ AUV) in confined underwater environments. This paper extends a recently-developed self-localization method that is based on the attenuation of electro-magnetic waves, to the μ AUV domain. We demonstrate a compact, low-cost architecture that is able to perform all signal processing st...

Journal: :Circulation 1967
F D Johnston

THE concept of listening to the electro-cardiogram brings up an interesting question and one that most cardiologists, even ones with long experience in electro-cardiography, have largely ignored. What would you expect to hear if any of the usual leads were amplified by a suitable electronic device and the output were connected to a loud speaker or to head phones? Since the QRS complexes are the...

A Ghorbanpour Arani, J Jafari Fesharaki M Mohammadimehr S Golabi

In this study an analytical method is developed to obtain the response of electro-magneto-thermo-elastic stress and perturbation of a magnetic field vector for a thick-walled spherical functionally graded piezoelectric material (FGPM). The hollow sphere, which is placed in a uniform magnetic field, is subjected to a temperature gradient, inner and outer pressures and a constant electric potenti...

Journal: :Optics express 2007
Gabriele Ferrari

Diode lasers enable one to continuously cover the 730 to 1100 nm range as well as the 370 to 550 nm range by frequency doubling, but a large part of the electro-magnetic spectrum spanning from green to red remains accessible only through expensive and unpractical optically pumped dye lasers. Here we devise a method to multiply the frequency of optical waves by a factor 3/2 with a conversion tha...

2009
Riccardo M.G. Ferrari

The acoustoelastic effect relates the change in the speed of an acoustic wave travelling in a solid, to the pre-stress of the propagation medium. In this work the possibility of assessing nondestructively the stress status in metal sheets, by using the acoustoelastic effect, is investigated. As the effect turns out to be very small for practical values of applied stress, the proposed technique ...

لویی منفرد, علی , هامون نورد, سحر ,

    Background & Aims : Electromagnetic waves, such as mobile wave and microwave radiation have been used in the contemporary world for many years. Considerably, the rapidly increasing use of mobile phones has led to pay more attention to the possible effects of being exposed to mobile phone radiation on lymphatic organs . This study was conducted to investigate the mentioned effects on mice.  ...

This paper deals with the propagation of magneto-thermo Rayleigh waves in a homogeneous viscoelastic half-space under initial stress. It has been observed that velocity of Rayleigh waves depends on viscosity, magnetic field, temperature and initial stress of the half-space. The frequency equation for Rayleigh waves under the effect of magnetic field, stress and temperature for both viscoelastic...

ژورنال: دانشور پزشکی 2015
احمدی, رحیم, خاکپور, بهروز, محمدی, سارا,

Background and Objective: Widespread use of cell phones and increased noise pollution in surrounding environment are the most important risk factors of human health in the age of technology. The aim of this study was to investigate the effects of mobile phone radiation and noise stress on serum levels of T3 and T4 in male rats. Materials and Methods: In this experimental study, the male Wist...

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