Results 1 to 10 of about 1,048,104 (202)
Plane Wave Imaging through Interfaces [PDF]
Sensors, 2021 Plane Wave Imaging (PWI) has been recently proposed for fast ultrasound inspections in the Non-Destructive-Testing (NDT) field. By using a single (or a reduced number) of plane wave emissions and parallel beamforming in reception, frame rates of hundreds
Guillermo Cosarinsky +2 more
doaj +2 more sources
Investigation of ultrasound plane-wave imaging for optimal synthetic focusing [PDF]
Scientific ReportsPlane-wave imaging for ultrafast ultrasound, revolutionized by substantially enhancing frame rates, has paved the way for numerous applications in medical ultrasound.
Doyoung Jang +4 more
doaj +2 more sources
A note on plane-wave approximation
Soil Dynamics and Earthquake Engineering, 2013 It is shown that the plane-wave assumption for incident SH waves is a good approximation for cylindrical waves radiated from a finite source even when it is as close as twice the size of inhomogeneity. It is concluded that for out-of-plane SH waves the plane-wave approximation should be adequate for many earthquake engineering studies.
Hasan Faïk Kara, Mihailo D Trifunac
exaly +3 more sources
Propagation of waves in an incompressible rotating transversely isotropic nonlocal elastic solid
Vietnam Journal of Mechanics, 2021 In this paper, the nonlocal elasticity theory is applied to study the propagation of plane wave and Rayleigh-type surface wave in an incompressible, rotating and transversely isotropic material.
Baljeet Singh
doaj +1 more source
Multi Spherical Wave Imaging Method Based on Ultrasonic Array
Sensors, 2022 The imaging range of traditional plane wave imaging is usually limited by the directivity of the plane wave. In this paper, a multi spherical wave imaging method based on an ultrasonic array is proposed, which radiates both compression and shear waves in
Zhi-Ying Liu +3 more
doaj +1 more source
Interpolated Plane Wave Imaging: IPWI
e-Journal of Nondestructive Testing, 2023 This paper offers a solution to the problems caused by sub-Nyquist spatial sampling in ultrasound image generation, which can result in aliasing and grating lobes in Full Matrix Capture (FMC) and Plane Wave Imaging (PWI). Neglecting the spatial sampling
Roberto Henry Herrera +3 more
doaj +1 more source
On horizons and plane waves [PDF]
Classical and Quantum Gravity, 2003 We investigate the possibility of having an event horizon within several classes of metrics that asymptote to the maximally supersymmetric IIB plane wave. We show that the presence of a null Killing vector (not necessarily covariantly constant) implies an effective separation of the Einstein equations into a standard and a wave component.
Liu, James T. +2 more
openaire +4 more sources
Lukash plane waves, revisited [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 The Lukash metric is a homogeneous gravitational wave which at late times approximates the behaviour of a generic class of spatially homogenous cosmological models with monotonically decreasing energy density. The transcription from Brinkmann to Baldwin-Jeffery-Rosen (BJR) to Bianchi coordinates is presented and the relation to a Sturm-Liouville ...
Elbistan, M. +3 more
openaire +5 more sources
AN OPERATOR METHOD FOR THE PROBLEM OF PLANE WAVE DIFFRACTION BY INFINITELY THIN, PERFECTLY CONDUCTING HALF-PLANE AND TWO DISKS [PDF]
Radio Physics and Radio Astronomy, 2022 Subject and Purpose. Considered in the paper is diffraction of a plane wave by a structure involving a half-plane and two disks. The disks and the half-plane, lying within parallel planes, are assumed to be infinitely thin and perfectly conducting.
M. E. Kaliberda +2 more
doaj +1 more source
Nuclear Physics B, 2003 48 pages, LaTeX2e, v2: additional references and cosmetic ...
Blau, Matthias, O'Loughlin, Martin
openaire +3 more sources