For several years, Pinton has been trying to develop better ultrasound imaging techniques for tracking
shear waves in living tissue.
Hernandez, S., Wiens, D., Anandakrishnan, S., Aster, R., Huerta, A., Nyblade, A., Wilson, T., Seismic anisotropy of the Antarctic upper mantle
from shear wave splitting analysis of POLENET and AGAP seismograms, Eos Trans.
Upper mantle seismic anisotropy of Antarctica from
shear wave splitting analysis, 11th International Symposium on Antarctic Earth Sciences, Edinburgh, Scotland, 10 - 16 July, 2011.
Ultrasound imaging technology is already available for
tracking shear waves in tissue but only relatively small and weak ones.
Acoustic energy from earthquakes can travel though Earth as different types of waves,
including shear waves, which oscillate perpendicular to the direction of propagation, and compressional waves, which oscillate in the same direction as they propagate.
Sun, Xinlei, Wiens, D., Anandakrishnan, S., Aster, R., Huerta, A., Nyblade, A., Wilson, T., An, M., Kanao, M., Crust and upper
mantle shear wave structure of Antarctica from seismic ambient noise, Eos Trans.
More than 15 years ago, Ehman began experimenting with mechanically produced seismic waves —
called shear waves — that could travel through human tissue.
Though the shock waves didn't last long, they delivered almost ten times the tissue - ripping acceleration seen in the
initial shear wave.
He's been focused on the study of impact -
induced shear waves, which jostle tissue with relatively slow, side - to - side forces, in contrast to the better - studied compression waves that travel in the direction of impact at the speed of sound.
Pinton and colleagues, with help from recent advances in a technology called ultrasound elastography, developed an ultrasound imaging device and data - processing algorithms to track the larger, more
powerful shear waves that they and other researchers suspect cause tissue damage after head injuries.
By analyzing the extent to
which shear waves convert to compression waves when they hit a contrast in rock properties, the researchers could create a seismic image of the subsurface crust.
At the end of the 4 - week study, the skin was evaluated using the speed of propagation of
ultrasound shear waves, and self - evaluations were collected from each of the study participants.
Perform shear wave / straight beam ultrasonic inspection of weld area / other areas with automated and handheld UT equipment for imperfections or other non-conformances.
Acoustic energy from earthquakes can travel though the Earth as different types of waves,
including shear waves, which oscillate perpendicular to the direction of propagation, and compressional waves, which oscillate in the same direction as they propagate.
«Upper mantle seismic anisotropy beneath the West Antarctic Rift System and surrounding region
from shear wave splitting analysis.»
Pinton's team found that impacts resulted in
shear waves that sometimes bunched up and intensified deep within the brain tissue to form short - lived shock waves.
Also called a secondary wave or
shear wave.
Candidate must have a minimum qualification of Level II... Certified Welding Inspection (AWS - CWI) and / or Ultrasonic -
shear wave (UT) and / or PT (Liquid...