Results 221 to 230 of about 28,230 (268)
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Seismic Shear Waves in Engineering
Journal of the Geotechnical Engineering Division, 1974Measurements of seismic shear wave velocity and absorption coefficient can find use in soil and rock mechanics, foundation studies, structures, slope stability analysis, and the determination of dynamic elastic moduli. Shear waves in engineering studies must be separated from compressional, Rayleigh, and Love wave arrivals.
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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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Sound waves and shear waves in sediments
The Journal of the Acoustical Society of America, 2006In a long and illustrious career, Joe Blue made many significant contributions to the discipline of underwater acoustics, although he is probably best known for his work on the design and calibration of hydrophones and hydrophone arrays. Such instrumentation has many applications, including measurements of the geoacoustic properties of marine sediments.
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Geophysics, 1956
Abstract A series of measurements was made to investigate some of the fundamental properties of shear waves and to explore the possibility of using horizontally polarized (SH) shear waves for reflection prospecting. A special source was devised to produce a shearing motion which was detectable as far as 400 feet vertically and 1,000 ...
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Abstract A series of measurements was made to investigate some of the fundamental properties of shear waves and to explore the possibility of using horizontally polarized (SH) shear waves for reflection prospecting. A special source was devised to produce a shearing motion which was detectable as far as 400 feet vertically and 1,000 ...
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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.
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Shear wave estimation by using Shear Wave Holography with normal vibration: Preliminary results
2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017Mechanical properties of soft human tissue are linked to their pathological state. One way to assess these properties is through the Young modulus measurement, which is related to the shear wave speed in the medium when considering tissues as nearly incompressible.
Junior Arroyo, Benjamín Castañeda
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Estimation of seabed shear-wave velocity profiles using shear-wave source data
The Journal of the Acoustical Society of America, 2013This paper estimates seabed shear-wave velocity profiles and their uncertainties using interface-wave dispersion curves extracted from data generated by a shear-wave source. The shear-wave source generated a seismic signature over a frequency range between 2 and 60 Hz and was polarized in both in-line and cross-line orientations. Low-frequency Scholte-
Hefeng, Dong +2 more
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On the effects of reflected waves in transient shear wave elastography
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2011In recent years, novel quantitative techniques have been developed to provide noninvasive and quantitative stiffness images based on shear wave propagation. Using radiation force and ultrafast ultrasound imaging, the supersonic shear imaging technique allows one to remotely generate and follow a transient plane shear wave propagating in vivo in real ...
Thomas, Deffieux +3 more
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A unifying fractional wave equation for compressional and shear waves
The Journal of the Acoustical Society of America, 2010This study has been motivated by the observed difference in the range of the power-law attenuation exponent for compressional and shear waves. Usually compressional attenuation increases with frequency to a power between 1 and 2, while shear wave attenuation often is described with powers less than 1.
Holm, Sverre, Sinkus, Ralph
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Astronomical & Astrophysical Transactions, 2003
The exact analytical solution of the extended Rayleigh equation for the case of periodic compressible shear flow is found. The dispersion relation of the problem is the Hill determinant. It is found that the sound waves in shear flow have a dispersion and its velocity field contains a solenoidal part.
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The exact analytical solution of the extended Rayleigh equation for the case of periodic compressible shear flow is found. The dispersion relation of the problem is the Hill determinant. It is found that the sound waves in shear flow have a dispersion and its velocity field contains a solenoidal part.
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