نتایج جستجو برای: electro magnetic waves cell phone

تعداد نتایج: 2159331  

Journal: :JAMA otolaryngology-- head & neck surgery 2013
Michael D Seidman Bianca Siegel Priyanka Shah Susan M Bowyer

IMPORTANCE A thorough understanding of why we hold a cell phone to a particular ear may be of importance when studying the impact of cell phone safety. OBJECTIVE To determine if there is an obvious association between sidedness of cell phone use and auditory hemispheric dominance (AHD) or language hemispheric dominance (LHD). It is known that 70% to 95% of the population are right-handed, and...

2011
L. K. Lai T. S. Liu

Endowed with Hall-effect sensors and voice coil motors, cell phone cameras as intelligent systems are capable to execute auto-focusing for acquiring sharp image. For the use of cell phone cameras, this study presents an innovative auto-focusing module. When coils are powered, induced magnetic fields generate N and S poles around iron cores in the actuator. Unlike voice coil motors that employ L...

Journal: :Optica 2021

Since the advent of laser, acousto-optic modulators have been an important tool for controlling light. Recent advances in on-chip lithium niobate waveguide technology present new opportunities these devices. We demonstrate a collinear modulator suspended film employing high-confinement, wavelength-scale waveguide. By strongly confining optical and mechanical waves, this improves figure-of-merit...

Journal: :Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie 2008
Ashok Agarwal Nisarg R Desai Riccardo Ruffoli Angelo Carpi

The incidence of testicular cancer, cryptorchidism and defective spermatogenesis is increasing probably due to environmental and lifestyle-related factors. The aim of this review is to briefly describe and comment on the principal lifestyle factors. The recent findings that the electromagnetic waves following the use of the cell phone and the prolonged exposure to the noise stress cause relevan...

Journal: :Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 2023

This work presents a detailed investigation of the effect auxeticity synergised with pyro-coupling behaviour multiphase magneto-electro-elastic (M-MEE) composites using finite element (FE) framework. The nonlinear deflection and bending problems sandwich plates auxetic core M-MEE skins subjected to multi-physics load (electric, magnetic thermal) are probed. plate kinematics is governed by Reddy...

ژورنال: دانشور پزشکی 2008
اصیلیان, حسن , اکبری, مهدی , خوانین, علی , قدس, شیوا , نجفی, پروین , پیله‌وریان, علی‌اصغر ,

  Background: Increase in mobile phone users cause extensive consideration of researchers to biological effects of mobile phone waves. As the mobile set, is held near the ear and temporal lobe, and whereas distance of antenna from the inner ear is few centimeters, this study is the first research in our country to assess potential changes in auditory brain stem response of rabbit after exposure...

2004
Shyh-Lin Tsao

No.1, Roosevelt Rd,. Sec. 4, TaGei, Taiwan 106, R.O.C. Phone: 886-2-2363525 1, Fax: 886-2-23678254, E-mail: [email protected] Shyh-Lin Tsao Institute of Electro-Optical Science and Technology, National Taiwan Normal University, No.88, Ting-ChouiRd,. Sec. 4, Taipei, Taiwan 116, R.O.C. Phone: 886-2-29350349, FAX: 886-2-29350382, E-mail: [email protected],tw Abstract Analysis of rhe minim...

In this study, waves instability in free electron laser with background plasma, under the influence of self-electric and self-magnetic fields, are analyzed. A dispersion relation in the Raman regime for free electron laser with a helical wiggler magnetic field and an axial magnetic field derived in which all possible wave modes can have unstable couplings with each other. This dispersion relati...

Journal: :The Journal of Experimental Medicine 2003
Ronald V. Christie Alfred L. Loomis

1. Biological effects of electromagnetic waves emitted by a vacuum tube oscillator have been studied at frequencis ranging from 8,300,000 to 158,000,000 cycles per second (1.9 to 38 meters wave-length). 2. The effects produced on animals can be fully explained on the basis of the heat generated by high frequency currents which are induced in them. 3. No evidence was obtained to support the theo...

2016
Ajanta Barh M. A. Rahman

Terahertz (THz) frequency range, lying between the optical and microwave range covers a significant portion of the electro-magnetic spectrum. Though its initial usage started in the 1960s, active research in the THz field started only in the 1990s by researchers from both optics and microwaves disciplines. The use of optical fibers for THz application has attracted considerable attention in rec...

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