نتایج جستجو برای: electro magnetic waves cell phone

تعداد نتایج: 2159331  

2014
Algirdas Antano Maknickas

The article describes communication system working on base of gravity waves. Such system of devices should work if the electromagnetic field curves space-time. Theoretical results shows that the artificial change of gravity of space-time curvature should observes in the distance much more bigger than dimension of transmitter antenna. The article end with discussion of details of technical prope...

Journal: :Astronomy and Astrophysics 2021

The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is designed to measure in situ magnetic electric fields waves from continuum up several hundred kHz. RPW also observes solar heliospheric radio emissions 16 MHz. It was switched its antennae were successfully deployed two days after launch of February 10, 2020. Since then, has acquired enough data make it possible asse...

Journal: :Mechanical Systems and Signal Processing 2022

This paper evaluates the benefits of using ultrasonic guided waves for mapping a structure, when implemented on mobile magnetic robotic platform. It considers specific problem geometric features waves, which enables localisation edges and/or welded joints. Shear Horizontal (SH) generated by Electro-Magnetic Acoustic Transducers (EMATs) are used steel samples with nominal thickness 10 mm. A Baye...

Journal: :Electromagnetic biology and medicine 2012
Saadet D Celikozlu M Sabri Ozyurt Ali Cimbiz Melda Y Yardimoglu M Kasim Cayci Yusuf Ozay

The aim of this study is to determine the effects of magnetic field via cell phones on some blood parameters and neurons in the brain of rats. Animals have been classified into three groups: control, Magnetic Field (MF), and F2 groups. Throughout this study, cell phones were placed on the wall of the cages. Rats were exposed to the effects of cell phones during prenatal and postnatal periods un...

2013
Mohammad Reza Bigdeli Mehdi Rahnama

Abstract Objective: Electro-magnetic radiation (EMR) is emitted from mobile phones. Various researches have shown relationships between mobile phone EMR exposure to cancer and neurologic damages. This study aims to investigate the effects of mobile phone EMR on brain antioxidant enzyme activity and the learning process. Methods: Rat pups and their dames were exposed to EMR for 3 h per day from ...

Journal: :iranian journal of medical physics 0
mehri kaviani moghadam ph.d. student in medical physics, tarbiat modares university, tehran, iran , seyed mohammad jafar pourmir firoozabadi associate professor, medical physics dept., tarbiat modares university, tehran, iran m. lak m.sc. student in biomedical engineering (bioelectric), science and research campus, islamic azad university, member of young researchers club, tehran, iran m. janahmadi professor, physiology and neuroscience research center, shahid beheshti medical sciences university, tehran, iran

introduction:  the  use  of  mobile  communication  systems  has  dramatically  increased  over  the  past  decade. although many studies have been performed to determine the effect of radio frequency (rf) but  less attention has been paid to the possible biological impact of exposure to extremely low frequency  (elf) components.   the objective of this study is two folds. one is to design the ...

2016
Bing Li Mingzhu Lei Meiyuan Chen Lanyong Zhang

High-frequency digital signal processors are increasingly suffering from electro-magnetic interference, due to its ever-increasing integration level and operation speed. The accurate prediction of its electro-magnetic effects require less effort to be spared in the design procedures to obtain better electro-magnetic compatibility and to avoid later modifications that are lengthy and expensive. ...

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