نتایج جستجو برای: electromagnetic radiation

تعداد نتایج: 286933  

2013
Dimitris J. Panagopoulos Olle Johansson George L. Carlo

PURPOSE To evaluate SAR as a dosimetric quantity for EMF bioeffects, and identify ways for increasing the precision in EMF dosimetry and bioactivity assessment. METHODS We discuss the interaction of man-made electromagnetic waves with biological matter and calculate the energy transferred to a single free ion within a cell. We analyze the physics and biology of SAR and evaluate the methods of...

Journal: :Physical review letters 2012
Mehmet Mutlu Ahmet E Akosman Andriy E Serebryannikov Ekmel Ozbay

An asymmetric, reciprocal, diffraction-free transmission of linearly polarized waves in a new diodelike, three-layer, ultrathin, chiral structure is studied theoretically and experimentally. The exploited physical mechanism is based on the maximization of the cross-polarized transmission in one direction due to the polarization selectivity dictated by the peculiar eigenstate combination, which ...

2017
Saleha A. Shaikh Ami A. Desai Amit A. Deshmukh

The electromagnetic band gap structures are widely used to suppress pronounced surface waves in antennas with thicker substrate and higher dielectric constant. This paper reviews various application of Electromagnetic band gap structure in microstrip antenna, a band gap characterization of an electromagnetic bandgap structure along with the explanation of various reported configurations of comp...

Journal: :Journal of radiological protection : official journal of the Society for Radiological Protection 2001
Z O Alhekail

Electromagnetic radiation from microwave ovens in Saudi Arabia was investigated by means of a field measurement survey. The survey was carried out for 106 ovens used in households and restaurants in Riyadh city. Ovens were between 1 month and 14 years old with operating power ranging from 0.5 to 4.4 kW. One oven was found to leak more than the 5 mW cm(-2) limit specified in the standard. Fiftee...

2006
John W. Norbury Khin Maung Maung

Relativistic nucleus-nucleus reactions occur mainly through the Strong or Electromagnetic (EM) interactions. Transport codes often neglect the latter. This work shows the importance of including EM interactions for space radiation applications.

Journal: :Journal of Radiation Research and Applied Sciences 2015

Journal: :Optics express 2005
Ilya Shadrivov Nina Zharova Alexander Zharov Yuri Kivshar

We study one- and two-dimensional transmission of electromagnetic waves through a finite slab of a dielectric material with negative refraction. In the case when the dielectric slab possesses an intensitydependent nonlinear response, we observe the nonlinearity-induced wave transmission through an opaque slab accompanied by the generation of spatiotemporal solitons. We solve this problem numeri...

Journal: :Physical review letters 2003
E Cubukcu K Aydin E Ozbay S Foteinopoulou C M Soukoulis

We experimentally and theoretically demonstrate single-beam negative refraction and superlensing in the valence band of a two-dimensional photonic crystal operating in the microwave regime. By measuring the refracted electromagnetic waves from a slab shaped photonic crystal, we find a refractive index of -1.94 that is very close to the theoretical value of -2.06. A scanning transmission measure...

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