W
William T. Yost
Researcher at Langley Research Center
Publications - 131
Citations - 2121
William T. Yost is an academic researcher from Langley Research Center. The author has contributed to research in topics: Ultrasonic sensor & Intracranial pressure. The author has an hindex of 23, co-authored 131 publications receiving 1996 citations. Previous affiliations of William T. Yost include Government of the United States of America.
Papers
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Journal ArticleDOI
Nonlinear ultrasonic characterization of fatigue microstructures
John H. Cantrell,William T. Yost +1 more
TL;DR: In this article, a model of ultrasonic wave-dislocation dipole interactions is developed that quantifies the wave distortion by means of a material nonlinearity parameter (beta).
Journal ArticleDOI
Acoustic harmonic generation from fatigue-induced dislocation dipoles
John H. Cantrell,William T. Yost +1 more
TL;DR: In this paper, a model of the interaction of an acoustic wave with dislocation dipoles and dipole-array approximations to veins and persistent slip bands (substructures) formed during metal fatigue is presented.
Journal ArticleDOI
Effect of precipitate coherency strains on acoustic harmonic generation
John H. Cantrell,William T. Yost +1 more
TL;DR: In this article, a model of the dependence of acoustic harmonic generation in polycrystalline solids on the coherency strains resulting from the lattice mismatch at the interface between the matrix material and a precipitated second phase in the material was presented.
Journal ArticleDOI
Determination of precipitate nucleation and growth rates from ultrasonic harmonic generation
John H. Cantrell,William T. Yost +1 more
TL;DR: In this article, an analytical model based on precipitate-dislocation interactions is presented that predicts a decrease in ultrasonic harmonic generation during the nucleation of precipitates and an increase during precipitate growth up to the point of precipitatematrix coherency loss.
Patent
Non-invasive method and apparatus for monitoring intracranial pressure and pressure volume index in humans
William T. Yost,John H. Cantrell +1 more
TL;DR: In this article, a non-invasive measuring device is calibrated for monitoring purposes by providing known changes in intracranial pressure (ICP) by noninvasive methods such as placing the patient on a tilting bed and calculating a change in ICP from the tilt angle and the length of the patient's cerebrospinal column, or by placing a pressurized skull cap on the patient and measuring the inflation pressure.