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Shear‐wave birefringence and ultrasonic shear‐wave attenuation measurements
SEG Technical Program Expanded Abstracts 1988, 1988Extensive laboratory measurements of acoustic wave attenuation in rocks have been carried out in sonic and ultrasonic frequency ranges. Surprising strong ultrasonic shear wave attenuation values, even under high confining pressure, have led us to assume that shear wave birefringence could be responsible for such a behavior.
Nathalie M. Lucet, Pierre A. Tarif
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IEEE Transactions on Magnetics, 1988
A method of measuring low magnetic fields based on the magnetoelastic effect in amorphous magnetic materials is described. Preliminary results indicate a sensitivity of order 2.5 nT in the frequency range 0-1.6 Hz. The potential sensitivity is estimated to be better than 1 pT.
P.T. Squire, M.R.J. Gibbs
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A method of measuring low magnetic fields based on the magnetoelastic effect in amorphous magnetic materials is described. Preliminary results indicate a sensitivity of order 2.5 nT in the frequency range 0-1.6 Hz. The potential sensitivity is estimated to be better than 1 pT.
P.T. Squire, M.R.J. Gibbs
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Predictors of shear wave propagation speed assessed by shear wave elastography
European Heart Journal, 2022Abstract Background Cardiac shear wave elastography (SWE) is a novel ultrasound-based method that assesses the propagation speed of shear waves travelling in the myocardium induced by e.g. mitral valve closure (MVC).
S Bezy +7 more
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Abdominal Radiology, 2017
Chronic liver disease is a substantial world-wide problem. Its major consequence is increasing deposition of fibrous tissue within the liver leading to the development of cirrhosis with its consequences of portal hypertension, hepatic insufficiency, and hepatocellular carcinoma.
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Chronic liver disease is a substantial world-wide problem. Its major consequence is increasing deposition of fibrous tissue within the liver leading to the development of cirrhosis with its consequences of portal hypertension, hepatic insufficiency, and hepatocellular carcinoma.
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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1987
A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides
F, Cohen-Tenoudji +4 more
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A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides
F, Cohen-Tenoudji +4 more
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Three-wave radial shearing interferometer
Optics Letters, 2019We propose a simple and compact three-wave radial shearing interferometer (TWRSI). This interferometer is constructed by a Gabor zone plate (GZP) and a charge-coupled device (CCD). The nominal plane wavefront under test is diffracted by the GZP into three orders (i.e., a parallel beam, a converging spherical beam, and a diverging spherical beam ...
Zhongyu, Wang +3 more
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Journal of the Hydraulics Division, 1974
Two examples of steep very large amplitude waves are described. One occurs on flows below weirs or sluices and is known as the wave hydraulic jump. A simple analysis is presented to describe its main features. The other example occurs in backwash from surf and has not previously been described.
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Two examples of steep very large amplitude waves are described. One occurs on flows below weirs or sluices and is known as the wave hydraulic jump. A simple analysis is presented to describe its main features. The other example occurs in backwash from surf and has not previously been described.
openaire +1 more source