On determination of orthotropic material moduli from ultrasonic velocity data in nonsymmetry planes

1994 ◽  
Vol 95 (6) ◽  
pp. 3191-3203 ◽  
Author(s):  
Y. C. Chu ◽  
A. D. Degtyar ◽  
S. I. Rokhlin
Keyword(s):  
Ultrasonic Velocity ◽  
Orthotropic Material ◽  
Velocity Data

Ultrasonic velocity determination of the phase diagram of UPt3

1991 ◽  
Vol 169 (1-4) ◽  
pp. 493-494 ◽  
Author(s):  
S.W. Lin ◽  
Q.Z. Ran ◽  
S. Adenwalla ◽  
Z. Zhao ◽  
J.B. Ketterson ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Ultrasonic Velocity

scholarly journals Determination of Ethanol and Extract Concentration in Sake by Ultrasonic Velocity Meter

1988 ◽  
Vol 83 (6) ◽  
pp. 416-419 ◽  
Author(s):  
Kyoichi KONDO ◽  
Hideo MISHIMA ◽  
Shigezo TAKEMURA ◽  
Kazuo SATO ◽  
Kiyoshi YOSHIZAWA
Keyword(s):  
Ultrasonic Velocity ◽  
Extract Concentration

Determination of the Ultrasonic Velocity on a Recent and Aged Pine Wood

2021 ◽  
Author(s):  
Héctor Carreon ◽  
Mayra Carrillo
Keyword(s):  
Ultrasonic Velocity ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Degradation Process ◽  
Ultrasonic Transducers ◽  
Center Frequency ◽  
Ultrasonic Emission ◽  
Significant Mass

Abstract Aging in wood is the inevitable modification of physical and mechanical properties due to deterioration caused by different factors such as organisms that destroy wood, photodegradation, weathering or long-term loading. During the wood degradation process, significant mass, stiffness and strength are lost. Therefore, it is relevant to monitor the wood decomposition process to guarantee the structural requirements in buildings. This research work aims to report the influence of degradation in wood due to deterioration through the use of ultrasonic measurements. Longitudinal and transverse ultrasonic velocities were calculated using the ultrasonic emission-transmission technique for aged and unaged Mexican pine (Pinus Strobus) wood. The experimental measurements were carried out using longitudinal and shear wave ultrasonic transducers with a center frequency of 1.0 MHz and 0.5MHz respectively. Scanning electron microscopy (SEM) was performed to establish a direct correlation with the behavior of the ultrasonic wave developed in naturally aged and unaged wood. Measurements revealed higher ultrasonic velocity values for unaged wood samples in longitudinal, tangential and radial directions compared to aged wood samples, but no significant differences were found in all other wood directions.

scholarly journals The field luminosity function and nearby groups of galaxies

1978 ◽  
Vol 79 ◽  
pp. 271-273
Author(s):  
John Huchra
Keyword(s):  
Surface Brightness ◽  
Luminosity Function ◽  
High Surface ◽  
Homogeneous System ◽  
Velocity Data ◽  
Limited Sample ◽  
Groups Of Galaxies ◽  
Dynamical Properties ◽  
Radial Velocity Data

We have assembled a catalog of radial velocities and magnitudes on a homogeneous system (the corrected Harvard, B(o) magnitudes of de Vaucouleurs) for over 4000 galaxies. Using this catalog, we have compiled a magnitude limited sample of ~ 1000 galaxies with nearly complete radial velocity data. the magnitude limit is 13.0 and the galaxies are primarily from the Shapley-Ames catalog plus a few low and high surface brightness objects properly included in a magnitude limited sample. My colleagues, M. Davis, M. Geller and I are presently analyzing the dynamical properties of this sample. I would like to briefly describe a new determination of the field luminosity function and density plus our initial experiments with the use of a redshift catalog to select groups of galaxies.

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