نتایج جستجو برای: electromagnetic fields radiation

تعداد نتایج: 509824  

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2006
Henk F Arnoldus

Scattering of electromagnetic radiation by an object of arbitrary shape or a structured surface, infinite in extent, is considered. When radiation is incident on an interface separating vacuum from a material medium, a current density is induced in the bulk and a surface current density may appear on the boundary surface. The electromagnetic field is then the sum of the incident field and the f...

Miranda-Filho et al. in their recently published paper entitled “Cancers of the brain and CNS: global patterns and trends in incidence” provided a global status report of the geographic and temporal variations in the incidence of brain and CNS cancers in different countries across continents worldwide. While the authors confirm the role of genetic risk factors and ionizing radiation exposur...

2005
P. Ghosh M. Kalam S. Mandal

We study the gravitational properties of a global monopole in (D = d + 2) dimensional space-time in presence of electromagnetic field.

Journal: :journal of biomedical physics and engineering 0
s a r mortazavi m haghani s zarei n rastegarian n alighanbari m haghparast

mobile phones, mobile phone base stations, cordless phones and power lines are among the main sources of our daily exposures to radiofrequency electromagnetic fields (rf-emf). today, a large proportion of children aged eight and under has used smart phones and tablets for media activities such as playing online games, watching videos or using different applications. over the past several years,...

A Rafati A Soleimani, A Talebi M Haghani S M J Mortazavi, S Rahimi

Introduction: The fast-growing telecommunication and wireless technologies has led to more dependence to these communication devices and higher levels of exposure to electromagnetic radiations propagated by cellular devices and their service towers. To disable signaling in places where silence is valued or where information quarantine measures are required, mobile phone jammers emit radiofreque...

Journal: :journal of biomedical physics and engineering 0
s zarei smj mortazavi ar mehdizadeh m jalalipour s borzou s taeb

800x600 background: nowadays, mothers are continuously exposed to different sources of electromagnetic fields before and even during pregnancy.   it has recently been shown that exposure to mobile phone radiation during pregnancy may lead to adverse effects on the brain development in offspring and cause hyperactivity. researchers have shown that behavioral problems in laboratory animals which ...

Journal: :jundishapur journal of health sciences 0
behzad fouladi dehaghi department of occupational health, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of occupational health, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel/fax: +98-6113738282 alireza ghamar department of occupational health, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran seyed mahmood latifi department of bio-statistics, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

conclusions the study results are indicative of the impact of electromagnetic fields on computer users’ health, and it is thus advisable to avoid leaving computers switched on unnecessarily in addition to observing the minimum distance of 60 cm from computer monitors to control the adverse effects of electromagnetic fields. materials and methods electric and magnetic field intensities were meas...

Introduction: Today, humans leave in a world surrounded by electromagnetic fields. Numerous studies have been carried out to discover the biological, physiological, and behavioral effects of electromagnetic fields on humans and animals. Given the biological similarities between monkeys and humans, the goal of the present research was to examine Visual Memory (VM), hormonal, genomic, and anatomi...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2004
Ihor Berezhnyy Aristide Dogariu

We present a polarimetric technique that provides a complete description of a mixture of uncorrelated optical fields with different spectral and polarization properties. The second-order coherence theory is used to describe the superposition of two random optical fields, and an imaging experiment is reported that illustrates the capability to separate radiations with different spectral composit...

Journal: :Physical review letters 2010
Yiqiao Tang Adam E Cohen

We introduce a measure of the local density of chirality of the electromagnetic field. This optical chirality determines the asymmetry in the rates of excitation between a small chiral molecule and its mirror image, and applies to molecules in electromagnetic fields with arbitrary spatial dependence. A continuity equation for optical chirality in the presence of material currents describes the ...

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