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A modified thickness extensional disk transducer

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1988
Photolithography and chemical etching were investigated as a means of patterning miniature piezoelectric devices. Using a processing procedure analogous to that utilized in the production of integrated circuitry, concentrated hydrochloric acid and a commercially available photoresist were used to fabricate a number of complex structures from soft lead ...
S E, Trolier, Q C, Xu, R E, Newnham
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Disk Galaxies with Finite Thickness

Astrophysics and Space Science, 2002
The effect of finite thickness on the properties of disk galaxies is calculated on the basis of a rigorous mathematical treatment in terms of Green function and Bessel Fourier transformation. In our approach, the mass of the galactic halo is determined by fitting the observed rotation curve with a five-component model.
Qiu-He Peng   +3 more
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The Galactic Thick Disk – Status

Astrophysics and Space Science, 1999
The status of the Galactic thick disk is reviewed. Consideration of the recent literature suggests that its vertical scale height and normalisation with respect to the thin disk remain uncertain to within a factor two, with values reported in the ranges 750–1500 pc, and 0.02–0.13, respectively.
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