نتایج جستجو برای: ism magnetic fields

تعداد نتایج: 541421  

Journal: :Proceedings of the International Astronomical Union 2017

Alfvén waves dissipation is an extensively studied mechanism for the coronal heating problem. These waves can be generated by magnetic reconnection and propagated along the reconnected field lines. Here, we study the generation of Alfvén waves at the presence of both steady flow and sheared magnetic field in the longitudinally density stratified of solar spicules. The initial flow is assumed to...

2009
T. P. Downes S. O’Sullivan

It is well known that non-ideal magnetohydrodynamic effects are important in the dynamics of molecular clouds: both ambipolar diffusion and possibly the Hall effect have been identified as significant. We present the results of a suite of simulations with a resolution of 512 of turbulent decay in molecular clouds incorporating a simplified form of both ambipolar diffusion and the Hall effect si...

Journal: :iranian journal of medical physics 0
farshid ghorbani shahna assistant professor, occupational health dept., faculty of public health and research center for health science, hamedan university of medical sciences, hamedan, iran. mahboobeh eshaghi ph.d. student of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran. tahereh dehghanpour b.sc. of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran. zohre karami b.sc. of occupational health, faculty of public health, hamedan university of medical sciences, shiraz, iran.

introduction: public and occupational exposure to extremely low frequency (elf) electric and magnetic fields induced by electrical equipment is a significant issue in the environment and at the workplace due to their potential health effects on public health. the purpose of this study was assessment of the electric and magnetic fields intensities and determination of mental and psychological ef...

Journal: :iranian journal of medical physics 0
seyed ali saiedi zadeh ms.c. in occupational hygiene , tehran university of medical sciences, tehran, iran parvin nassiri professor, occupational health dept., tehran university of medical sciences, tehran, iran hojjat zeraati assistant professor, epidemiology and biostatistics dept.,tehran university of medical sciences, tehran, iran rahmatollah jahangiri assistant professor, school of medicine, army university of medical sciences, tehran, iran

introduction: it has been reported that cardiovascular effects are among the possible health effects of being exposed to extremely low frequency electromagnetic fields (elf emss). material and methods: this study has been conducted to evaluate the long term effects of exposure to magnetic and electric fields on electrocardiogram signal changes. nine power transmission posts having different vol...

2008
Katarzyna Otmianowska-Mazur Grzegorz Kowal Harald Lesch

Aims. We present a parameter study of the magnetohydrodynamical dynamo driven by cosmic rays in the interstellar medium (ISM) focusing on the efficiency of magnetic field amplification and the issue of energy equipartition between magnetic, kinetic and cosmic

Introduction Over the last decades, considerable levels of electromagnetic fields (EMFs) have been characterized in the living environment. Recent epidemiological studies on occupational and residential exposure to EMF have shown that 50/60 Hz fields, known as extremely low frequencies (ELF), have various biological effects, such as angiogenesis. This study aimed to investigate the effect of en...

ژورنال: سنجش و ایمنی پرتو 2017

The technology used in energy-saving compact fluorescent lamps (CFLs), provides a quarter of the energy consumption of incandescent lamps to produce equivalent light energy while CLFs shelf life is up to ten times of incandescent lamps. So the incandescent lamps in homes and workplaces are replaced with CFLs. Due to the use of ballast in the structure of CFLs, electric and magnetic fields are g...

Journal: :iranian journal of public health 0
f. akbar khanzadeh

the exposure of workers to magnetic field that occur in aluminum reduction potrooms has been studied. the pattern of magnetic field intensity has been demonstrated along the shop. it has clearly been shown that the personnel working near the pots are exposed to 20-to 1000-gauss magnetic field. to set limits of exposure to magnetic fields, the literature on the biological effects of stationary m...

During the past decade considerable evidence has been accumulated with regard to the biological effects, both in vivo and in vitro, of extremely low frequency electric and magnetic fields, such as those originating from residentially proximate power lines, household electrical wiring and diagnostic apparatus and therapy devices. Also, during the evolution process, all living organisms experienc...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید