Index Catalog // ScholarsArchive@OSU

Creator:: Gimenez, Ramon Gonzalez
Abstract:: Ultrasonic wave attenuation and velocity in the transverse direction were used to detect defects in ponderosa pine (Pinus Ponderosa) lumber previously dried from green to 9% moisture content. After ultrasonic testing the boards were visually inspected for defects and classified according to the defects present. An ANOVA with Bonferroni pairwise...
Resource Type:: Masters Thesis
Full Text:: ,-'---'-' .... "---'¥"--= ..... =·-~;II'-' --'''--~'-'-'--=-'V~-,_,., ___ _ Michael Milota Ultrasonic wave attenuation and velocity in

Creator:: Strauch, Joseph George
Abstract:: The velocity of sound in gases was measured, using an ultrasonic wave train as a diffraction grating. The fundamental problems involved in the optical technique are discussed. An apparatus utilizing an objective lens of focal length 1.5 m and aperture f/20 was constructed and used at an ultrasonic frequency close...
Resource Type:: Dissertation
Full Text:: ultrasonic wave front, this equation can be written as a grating equation; i\sin0 = X , (38) in which

Creator:: Park, Heeyong
Abstract:: The application of laser generated ultrasonics was first demonstrated in the mid-seventies and has shown good potential when applied to isotropic materials. However, its use with composite materials is still in the early stages of development. This study explores the potential for application of laser generated Rayleigh and Lamb waves...
Resource Type:: Dissertation
Full Text:: composites and an increase of Rayleigh wave attenuation could indicate damages caused by impact. Also

Creator:: Nair, Hari U.
Abstract:: Literature reports have indicated that application of sonic pressure waves enhances the rate of impregnation of preservatives in wood. However, these studies have been limited and inconclusive. The technique or process is not in commercial use. In this study a laboratory scale treating cylinder connected to a mechanical sonic wave...
Resource Type:: Masters Thesis
Full Text:: Analysis of Sonic Wave Pressure Treatment of Wood Abstract approved: Sheikh Burhanuddin Literature

Creator:: Wu, Wei-Cheng
Abstract:: The understanding and prediction how coastal wetland vegetation attenuates wave action has received renewed attention with global climate change impacts and increasing populations on coastlines. Conventional attenuation models utilize empirical drag coefficients, but these coefficients exhibit a wide range of values, and there is some uncertainty in the relative importance...
Resource Type:: Dissertation
Full Text:: Vegetation Density on Wave Attenuation AN ABSTRACT OF THE DISSERTATION OF Wei-Cheng Wu for the

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