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AIR COUPLED ACOUSTIC THERMOGRAPHY (ACAT) INSPECTION TECHNIQUE

Autor: J. N. Zalameda, W. P. Winfree, W. T. Yost, Donald O. Thompson, Dale E. Chimenti

Publikováno v: AIP Conference Proceedings.

The scope of this effort is to determine the viability of a new heating technique using a noncontact acoustic excitation source. Because of low coupling between air and the structure, a synchronous detection method is employed. Any reduction in the o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c7a096fde2e9170132d299f60593f747
https://doi.org/10.1063/1.2902697

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Development of a noninvasive technique for the measurement of intracranial pressure

Autor: T, Ueno, L M, Shuer, W T, Yost, A R, Hargens

Publikováno v: Uchu Seibutsu Kagaku. 12(3)

Intracranial pressure (ICP) dynamics are important for understanding adjustments to altered gravity. Previous flight observations document significant facial edema during exposure to microgravity, which suggests that ICP is elevated during microgravi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::4b079ab26a5323d27c14c0a70b596d26
https://pubmed.ncbi.nlm.nih.gov/11542486

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Intracranial pressure dynamics during simulated microgravity using a new noninvasive ultrasonic technique

Autor: T, Ueno, R E, Ballard, L M, Shuer, W T, Yost, J H, Cantrell, A R, Hargens

Publikováno v: Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology. 5(1)

It is believed that intracranial pressure (ICP) may be elevated in microgravity because a fluid shift toward the head occurs due to loss of gravitational blood pressures. Elevated ICP may contribute to space adaptation syndrome, because as widely obs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::70273db8525002ca55ded57afbdf306f
https://pubmed.ncbi.nlm.nih.gov/11542357

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Noninvasive measurement of pulsatile intracranial pressure using ultrasound

Autor: T, Ueno, R E, Ballard, L M, Shuer, J H, Cantrell, W T, Yost, A R, Hargens

Publikováno v: Acta neurochirurgica. Supplement. 71

The present study was designed to validate our noninvasive ultrasonic technique (pulse phase locked loop: PPLL) for measuring intracranial pressure (ICP) waveforms. The technique is based upon detecting skull movements which are known to occur in con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::35438cdb104d814aad819571cec118da
https://pubmed.ncbi.nlm.nih.gov/9779147

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A Comparison of Three Techniques to Determine the Nonlinear Ultrasonic Parameter β

Autor: D. C. Hurley, E. S. Boltz, W. T. Yost, C. M. Fortunko

Publikováno v: Review of Progress in Quantitative Nondestructive Evaluation ISBN: 9781461377252

In this paper, we describe experiments to evaluate the use of a laser interferometer as a quantitative probe of nonlinear ultrasonic propagation. Although other detection methods for nonlinear ultrasonics have been in use for several years — most n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8fa59fd7bfce8d6692a88d5d722caa47
https://doi.org/10.1007/978-1-4615-5947-4_180

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Enhancements and Extensions to OSEE Contamination Inspection

Autor: W. T. Yost, C. S. Welch

Publikováno v: Review of Progress in Quantitative Nondestructive Evaluation ISBN: 9781461358190

Optically Stimulated Electron Emission (OSEE) is a non-contacting method found to be very sensitive to some contaminants on metal surfaces. It has been developed in the aerospace community as an inspection tool for verifying cleanliness of surfaces p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e5b0456c27cd7557b627f95cdbb5e6c
https://doi.org/10.1007/978-1-4615-1987-4_210

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