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Tailoring edge and interface states in topological metastructures exhibiting the acoustic valley Hall effect
In this study, we investigate the acoustic topological insulator or topological metastructure, where an acoustic wave can exist only in an edge or...
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Precise simulation of surface acoustic wave devices using frequency-dependent coupling-of-modes parameters
Herein we extract all the frequency-dependent coupling-of-modes (COM) parameters, which will be used to the rapid simulation and optimal design of...
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Joint spectrogram segmentation and ridge-extraction method for separating multimodal guided waves in long bones
Ultrasonic guided waves (GWs) can be used to evaluate long bones effectively because of the ability to provide the information of the whole bone. In...
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Effect of selected signals of interest on ultrasonic backscattering measurement in cancellous bones
This study examined how the signals of interest (SOI) effect on the backscattering measurement numerically based on 3-D finite-difference time-domain...
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SATI algorithm — the calculation of stress aligned HTI stiffness tensor for sandstone reservoir from wireline data
I present an algorithm that uses cross-dipole wireline data only in order to estimate the HTI stiffness tensor for sandstone formations under in-situ ...
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Acoustic wave propagation in Ni3
R (R = Mo, Nb, Ta) compoundsThe ultrasonic properties of the hexagonal closed packed structured Ni 3 Mo, Ni 3 Nb and Ni 3 Ta compounds were studied at room temperature for their...
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A model for strong attenuation and dispersion of seismic P-waves in a partially saturated fractured reservoir
In this work we interpret the data showing unusually strong velocity dispersion of P-waves (up to 30%) and attenuation in a relatively narrow...
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Acoustic response characteristics of unsaturated porous media
By employing the plane wave analysis method, the dispersion equations associated with compressional and shear waves using Santos’s three-phase...
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Piezoelastic properties of retgersite determined by ultrasonic measurements
The elastic tensor of the tetragonal NiSO 4 . 6H2O (retgersite) was measured with a resonant ultrasonic plane parallel plate technique at room...
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The propagation of linear waves in humid, gas-saturated media
The process of propagation of acoustic waves in humid, gas-saturated porous media is investigated in a two-velocity approximation. A dispersion...
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Parametric excitation of shear waves in soft solids
One of the possible mechanisms that may underlie ultrasound-induced damage of soft solids is discussed. The model of three-wave interaction in a...
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Reconstruction of the Green function in problems of resonance acoustic spectroscopy
A possibility for reconstruction of the Green function for a three-dimensional elastic body (resonator) is considered. The initial data are the...
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Ultrasonic investigations in intermetallics
Ultrasonic attenuation for the longitudinal and shear waves due to phonon-phonon interaction and thermoelastic mechanism have been evaluated in B2...
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Resonance blocking of traveling waves by a system of cracks in an elastic layer
Wave processes that occur in an elastic layer when waves traveling in it are diffracted by a system of horizontal cracks are investigated. Integral...
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Helical waves in a fluid-filled cylindrical elastic shell
Helical normal waves of a waveguide that has the form of a fluid-filled thin elastic shell are considered. A dispersion equation for this kind of...
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Optodynamic description of a linear momentum transfer from a laser induced ultrasonic wave to a rod
We present a new optodynamic experimental technique to measure the linear momentum obtained by a rod during a nanosecond laser pulse ablation of the...
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Measurement of velocity distribution for longitudinal acoustic waves in welds by a laser optoacoustic technique
An optoacoustic technique for diagnostics of residual stress in metals is proposed. The theoretical part of the technique employs acoustoelastic...
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Simultaneous Measurements of an Ultrasound and a Torsional Oscillator for 4He in a Nanoporous Glass
Previously, we carried out ultrasonic measurements for liquid 4 He filled in a nanoporous glass (Gelsil), and observed an increase in the sound...