نتایج جستجو برای: transmitted waves

تعداد نتایج: 171258  

2003
Kasper van Wijk Matthew Haney Roel Snieder John A. Scales

There is a growing interest in incorporating multiply scattered waves into modeling the Earth’s interior using radiative transfer theory. For thin beds, we derive the equivalence of the exponential decay of the transmitted wave predicted by the O’Doherty-Anstey formula with the coherent wave obtained from radiative transfer. This shows an underlying relationship between mean field theory and ra...

Journal: :Physical review letters 2008
U Kuhl F M Izrailev A A Krokhin

We experimentally study the effect of enhancement of localization in weak one-dimensional random potentials. Our experimental setup is a single-mode waveguide with 100 tunable scatterers periodically inserted into the waveguide. By measuring the amplitudes of transmitted and reflected waves in the spacing between each pair of scatterers, we observe a strong decrease of the localization length w...

2007
P. N. Guzdar N. A. Gondarenko A. S. Sharma P. Rodriguez

High frequency (HF) radiation from the HAARP and SURA ionospheric heaters transmitted through the underdense ionosphere and received by the WIND satellite show the presence of strong spatial structure in the radiation pattern. A simple model based on the combination of ionospheric irregularities and interference effects has been developed to account for the observations. The analysis demonstrat...

Journal: :Optics express 2007
Alexander B Kozyrev Chao Qin Ilya V Shadrivov Yuri S Kivshar Isaac L Chuang Daniel W van der Weide

We study experimentally propagation of electromagnetic waves through a slab of uniaxial magnetic metamaterial. We observe a range of novel phenomena including partial focusing and splitting into multiple transmitted beams.We demonstrate that while some of these experimentally observed effects can be described within the approximation of an effective medium, a deeper understanding of the experim...

Journal: :iranian journal of public health 0
t zandieh b babaahmadi a pourfathollah h galedari j emam ma jalalifar

ttv was first isolated from the serum of a japanese patient with post transfusion hepatitis of unknown etiology in 1977. ttv has been visualized by electron microscopy and was found to be an unenveloped, small, spherical particle with a diameter of 30-32 nm, and is a member of family related to circovridae family. the exact role of ttv in the pathogenesis of liver disease is yet to be establish...

Journal: :Physical review letters 2001
B R Bulka P Stefański

Electronic transport through a quantum dot strongly coupled to electrodes is studied within a model with two conduction channels. It is shown that multiple scattering and interference of transmitted waves through both channels lead to Fano resonance associated with Kondo resonance. Interference effects are also pronouncedly seen in transport through the Aharonov-Bohm ring with the Kondo dot, wh...

2004
W. D. MCKEE

Equations are derived to approximately describe the propagation of small amplitude surface and interfacial waves across small irregularities in depth in a two-layer fluid. When the irregularities are sinusoidal, Bragg interaction effects between an incident surface wave and the bottom corrugations can lead to a large-amplitude reflected interfacial wave or a large-amplitude transmitted interfac...

Journal: :Circulation research 1963
J J FABER

• A number of investigators" have recently studied liow heart sounds and murmurs spread through the various tissues of men and dogs. For instance, Magri et al. studied the transmission of heart sounds over the surface of the exposed human heart. Ken and Harp, Iverr et al. and ourselves"' investigated the velocity and the damping with which sound is transmitted through arteries, and showed that ...

2009
Andrey V. Novitsky Denis V. Novitsky

In this Letter we propose the concept of the evanescent Airy beam. We analyze the structure of the ideal evanescent Airy beam, which initial profile has the Airy form, while the spectral decomposition consists of only evanescent partial waves. Also, we discuss the refraction of the Airy beam through the interface and investigate the field of the transmitted evanescent Airy beam. c © 2009 Optica...

Journal: :Nano Letters 2021

Implementing on-chip information processing systems through photonic–phononic interactions has attracted considerable interest owing to its potential for storing, sensing, and signal processing, but the generation extinction of acoustic waves are determined by existence pump power phonon lifetime. Here, we demonstrate acoustic-wave interference active manipulation optically driven in a silicon ...

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