نتایج جستجو برای: electromagnetic field measurement
تعداد نتایج: 1247827 فیلتر نتایج به سال:
Alfvén waves are fundamental plasma wave modes that permeate the universe. At small kinetic scales, they provide a critical mechanism for the transfer of energy between electromagnetic fields and charged particles. These waves are important not only in planetary magnetospheres, heliospheres and astrophysical systems but also in laboratory plasma experiments and fusion reactors. Through measurem...
An important property of electromagnetic fields, which arises from the interaction between fields and chiral molecules, is called optical chirality. By enhancing this field property, while maintaining constant input power, we are able to increase absorption of circularly polarized light by chiral molecules of a certain handedness. This enhancement is achieved through the use of achiral plasmoni...
The analyze of the electromagnetic field emitted by a source of opportunity (GNSS signals for instance) and scattered by the sea surface is a very active research field for the ocean-monitoring activity. For example, the project MOPSMarine Opportunity Passive Systems [1] was very recently launched to evaluate the performance of different GNSS receivers (L-Band) at dozens meters above the sea su...
Correction factors are presented for estimating the RF electromagnetic field strength in the compliance assessment of human exposure from an indoor RF radio source in the frequency range from 800 MHz to 3.5 GHz. The correction factors are derived from the increase in the spatial average electric field strength distribution, which is dependent on the building materials. The spatial average elect...
The article presents the concept of an electromagnetic circuit generator with permanent magnets mounted on the surface rotor core designed for single phase work. Computation field-circuit model was shown. The spectrum of time course of voltages in the idle work was presented. The cross section with graphically presentation of magnetic induction in particular parts of electromagnetic circuits wa...
چکیده ندارد.
We experimentally investigate the influence of an alternating electromagnetic field on the surface and internal qualities of Incoloy800H superalloy billets. The electromagnetic continuous casting experiments for Incoloy800H superalloy were successfully conducted and the billets (0.1 m ˆ 0.1 m ˆ 1.2 m) were obtained. We figure out that the high frequency (20.4 kHz) electromagnetic field which is...
One of the interesting Laser-Plasma phenomena, when the laser power is high and ultra intense, is the generation of large amplitude plasma waves (Wakefield) and electron acceleration. An intense electromagnetic laser pulse can create plasma oscillations through the action of the nonlinear pondermotive force. electrons trapped in the wake can be accelerated to high energies, more than 1 TW. Of t...
Introduction: Physical factors such as electromagnetic fields and chemical agents such as aluminum compounds can act as oxidative stress inducer. In the present study synergistic and toxic effects of aluminum in the presence of an alternating electromagnetic field is investigated. In order to make the protection the extract of Myrtus Communis was used Materials and Met...
background: with increased use of computers, exposure to electric and magnetic fields is increasing, the main objective of this study was to evaluate the electric and magnetic field strength in portable computers (laptops) and its relation with eyestrain users. methods: in this cross – sectional study, magnetic and electric fields in 125 laptop computers were measured from 30 cm and 50 cm dista...
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