نتایج جستجو برای: longitudinal wave

تعداد نتایج: 340307  

2015
Feng MIAO Yun-ping WANG

Abstract—The seismic response of special-shaped arch bridge was different from conventional arch bridge with obviously spatial coupling effect, researched the spatial seismic behavior of Tongtai bridge which in Zhangjiakou by finite element theory, analyzed the effect of seismic response peak on this bridge under longitudinal, horizontal and vertical three directions seismic wave propagation, p...

Journal: :archives of cardiovascular imaging 0
ikram kammoun department of cardiology, ariana hospital, tunis, tunisia; department of cardiology, ariana hospital, tunis, tunisia. tel: +216-98644048 lemone houchinne department of cardiology, ariana hospital, tunis, tunisia sonia marrakchi department of cardiology, ariana hospital, tunis, tunisia wael ben amara department of cardiology, ariana hospital, tunis, tunisia zied ibn elhaj department of cardiology, ariana hospital, tunis, tunisia souha mokrani department of cardiology, ariana hospital, tunis, tunisia

conclusions according to our multimodality imaging approach, hypertrophic cardiomyopathy was the most probable diagnosis. case presentation we describe a 73-year-old woman referred to us for consultation because of a giant negative t wave on her electrocardiography. echocardiography revealed diffuse severe hypertrophy associated with hypertrophied anterolateral papillary muscles with a bifid he...

Alireza Abdikian, GHahraman Solookinejad Zahra Safi,

In this paper, we investigated the corrected plasmon dispersion relation for graphene in presence of a constant magnetic field which it includes a quantum term arising from the collective electron density wave interference effects. By using quantum hydrodynamic plasma model which incorporates the important quantum statistical pressure and electron diffraction force, the longitudinal plasmons ar...

Journal: :int. j. lignocellulosic products 2014
m. madhoushi m. hashemi m.p. ansell

the aim of this study was to evaluate sound and decayed wood of iranianbeech (fagus orientalis) with a nondestructive stress wave method. wood samples,with dimensions of 9 by 19 by 200 mm were decayed in laboratory soil-bed tests,based on european pre-standard env-807. the decay was evaluated by measuringbending dynamic modulus of elasticity (moed) and longitudinal dynamicmodulus of elasticity ...

In this paper, free longitudinal vibration of nanorods is investigated from the wave viewpoint. The Eringen’s nonlocal elasticity theory is used for nanorods modelling. Wave propagation in a medium has a similar formulation as vibrations and thus,  it can be used to describe the vibration behavior. Boundaries reflect the propagating waves after incident. Firstly, the governing quation of nanoro...

Journal: :Applied physics letters 2017
Jiang Zhu Yusi Miao Li Qi Yueqiao Qu Youmin He Qiang Yang Zhongping Chen

Shear wave measurements for the determination of tissue elastic properties have been used in clinical diagnosis and soft tissue assessment. A shear wave propagates as a transverse wave where vibration is perpendicular to the wave propagation direction. Previous transverse shear wave measurements could detect the shear modulus in the lateral region of the force; however, they could not provide t...

2005
A. J. W HITTLE

Calibration and Reference Blocks ................................................................. 7 Longitudinal Wave Probes ............................................................................. 7 Transverse Wave Probes ............................................................................. 10 Measurement of Steel Thickness ...........................................................

Journal: :Journal of applied physiology 2006
Matt M Riordan Sándor J Kovács

For diastolic function (DF) quantification, transmitral flow velocity has been characterized in terms of the geometric features of a triangle (heights, widths, areas, durations) approximating the E-wave contour, whereas mitral annular velocity has only been characterized by E'-wave peak amplitude. The fact that E-waves convey global DF information, whereas annular E'-waves provide longitudinal ...

Journal: :The Journal of the Acoustical Society of America 2013
Igor I Lyapilin

The interaction of conduction electrons with a longitudinal sound wave propagating in a crystal in a constant magnetic field is investigated. It is shown that the transverse spin current arises when the longitudinal sound wave propagation through the system. The average power absorbed by the spin subsystem of the conduction electrons and the spin-Hall conductivity have a resonant character.

2017
J. E. Gubernatis

Several Padé methods were used to try to accelerate the convergence of partial wave sums for scattering amplitudes. A specific test problem of longitudinal-to-longitudinal scattering from a spherical void was studied in detail. Results for this test case and the behavior of partial wave amplitudes for general cases are presented and discussed.

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