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Shear wave velocity in surface sediments
Jökull, 2011Surface sediments of different nature are common in Iceland. Natural soil sites and man-made fillings commonly serve as foundations for different types of structures. In Civil engineering work it is fundamental to know the geotechnical properties of these materials in the upper 20–30 m.
Bjarni Bessason, Sigurður Erlingsson
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Shear wave velocities in the Earth's mantle
Physics of the Earth and Planetary Interiors, 1972Direct measurement of the travel time gradient for S waves together with travel time data are used to derive a shear velocity model for the earth's mantle. In order to satisfy the data it is necessary to discard the usual assumption of lateral homogeneity below shallow depths.
Russell Robinson, Robert L. Kovach
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Shear Wave Velocity in Marine Sediment
Japanese Journal of Applied Physics, 2006The shear wave velocity in surficial marine sediment is important evaluating the physical properties of such sediment. In this study, the dispersion of the shear wave velocity is investigated using the Biot–Stoll model. Next, the shear wave velocities of air- and water-saturated beach sands are measured at a low overburden stress, and the shear moduli ...
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Means for obtaining shear wave velocities
The Journal of the Acoustical Society of America, 1989The present invention provides a method of logging a subterranean formation through a wellbore containing a fluid, wherein no shear wave signal is obtainable utilizing conventional sonic well logging tools suspended in the wellbore. The shear wave signal is not obtainable usually because the acoustic velocity of the wellbore fluid is greater than the ...
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Measuring Shear Wave Velocity Using Bender Elements
Geotechnical Testing Journal, 2005Abstract The use of bender element to measure shear wave velocity is popular due to its simplicity. However, there are still some uncertainties in the interpretation of the bender element test. In this paper, the use of bender elements in the determination of shear wave velocities of dry, unsaturated, and saturated soil specimens is ...
Leong, Eng Choon +2 more
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Seafloor shear wave velocity variability.
The Journal of the Acoustical Society of America, 1992In gross classification, sediments of the deep seafloor may be of terrigenous or marine origin. Those of marine origin are classified as oozes (generally calcareous) or clays (generally siliceous) depending largely on whether their CaCO3 content is greater or less than 30%.
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Estimation of shear wave velocity in shallow marine sediments
IEEE Journal of Oceanic Engineering, 1994A method for estimating shear wave velocity in shallow marine sediments from the dispersive characteristics of seismic interface waves traveling at the water/sediment boundary is presented. Interface waves are recorded using an array of geophones placed on the seafloor, and the shear wave velocity is estimated by a nonlinear least-square inversion ...
CAITI, ANDREA, Akal T, Stoll RD
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Shear wave velocity measurement of upper trapezius muscle by color Doppler shear wave imaging
Journal of Medical Ultrasonics, 2017Skeletal muscle stiffness is thought to be the result of increased tissue hardness, but measurement accuracy has been dependent on operator technique. We have proposed a novel shear wave real-time imaging method (color Doppler shear wave imaging: CD SWI) with continuous shear waves excited from the tissue surface by a mechanical vibrator.Using the ...
Atsushi, Yamamoto +9 more
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Shear wave velocities in the lower mantle
Bulletin of the Seismological Society of America, 1969abstract The Large Aperture Seismic Array in eastern Montana was used to measure the travel times and dT/dΔ of earthquake-generated shear waves for the purpose of determining lower-mantle shear velocities. The data were limited to epicentral distances between 27 and 95 degrees.
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Shear Wave Velocities of Campanian Tuffs (Southern Italy)
1st EEGS Meeting, 1995Shear wave velocities of Campanian tuffs were measured both in the laboratory (ultrasonic pulse and resonant column) and in the field (Rayleigh wave spectral analysis). It resulted that it is not sufficient to recognize the tuff basement for computing the site amplification effects, but the dynamic parameters have to be measured because of hardening ...
Guadagno F. M. +2 more
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