Results 251 to 260 of about 1,478,939 (299)
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Surface Wave Momentum and Energy Velocities
Nature, 1971REYNOLDS1 defined the energy velocity associated with a simple periodic wave train on the surface of deep water as the phase velocity multiplied by the ratio of the energy transmitted across a fixed vertical plane during one wave period to the energy of the waves per wavelength.
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InP surface states and reduced surface recombination velocity
Applied Physics Letters, 1983Surface photovoltage and Auger electron spectroscopy studies of ultrahigh vacuum cleaved (110) and chemically treated (110) InP reveal direct optical transitions to and from surface states in the band gap for a wide variety of surface conditions.
L. J. Brillson, Y. Shapira, A. Heller
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The surface temperature of electromagnetic velocity probes
Cardiovascular Research, 1970The surface temperature rise of Mills's velometer and of a dummy velometer thermally similar to that described by Warbasse, Hellman, Gillilan, Hawley, and Babitt (1969) have been calculated and experimentally determined under various conditions. The results are in satisfactory agreement.
M A, Jones, D G, Wyatt
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Acoustic Velocity Formulation for Kirchhoff Data Surfaces
International Journal of Aeroacoustics, 2015This paper deals with the derivation of an analytical time-domain formulation for the prediction of the acoustic velocity field generated by moving bodies in a medium at rest, according to the Kirchhoff method. The present formulation can be implemented in acoustic pressure codes based on the Farassat's Kirchhoff formula for arbitrary moving bodies ...
Ghorbaniasl, Ghader +3 more
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THE GROUP VELOCITY OF PLANE SURFACE WAVES
Canadian Journal of Physics, 1960The velocity of transmission of a modulated microwave signal over a dielectric-covered plane conductor has been measured over a range of dielectric thicknesses for which the first order TM surface wave mode is known to propagate. An exact theoretical treatment of plane surface wave group velocity for both TM and TE surface wave modes of any order has ...
Mungall, A. G., Morris, D.
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Eos, Transactions American Geophysical Union, 1929
The paper (published in full in Bull. Seis. Soc Amer., v. 19, 63–76, 1929) deals with methods of interpreting instrumental records of seismic surface‐waves to determine the velocities of the several wave‐groups. Current methods of identifying surface‐waves depend upon characteristics of period and amplitude only and generally no attempt is made to ...
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The paper (published in full in Bull. Seis. Soc Amer., v. 19, 63–76, 1929) deals with methods of interpreting instrumental records of seismic surface‐waves to determine the velocities of the several wave‐groups. Current methods of identifying surface‐waves depend upon characteristics of period and amplitude only and generally no attempt is made to ...
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Downwash-velocity potential method for oscillating surfaces.
AIAA Journal, 1973The application of the downwash-velocity potential method to the case of oscillating surfaces is developed, and calculated forces are given on rectangular airfoils of aspect ratio two rotating about midchord in subsonic flows. These are compared with other results published in the literature for reduced frequencies up to nine-tenths, and for Mach ...
Haviland, John Kenneth, Yoo, Young Sik
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Unusually Low Surface-Recombination Velocity on Silicon and Germanium Surfaces
Physical Review Letters, 1986We have found that a standard, widespread, chemical-preparation method for silicon, oxidation followed by an HF etch, results in a surface which from an electronic point of view is remarkably inactive. With preparation in this manner, the surface-recombination velocity on Si111g is only 0.25 cm/sec, which is the lowest value ever reported for any ...
, Yablonovitch +4 more
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SEISMIC VELOCITIES FROM SURFACE MEASUREMENTS
GEOPHYSICS, 1955The purpose of this paper is to discuss field and interpretive techniques which permit, in favorable cases, the quite accurate determination of seismic interval velocities prior to drilling. A simple but accurate formula is developed for the quick calculation of interval velocities from “average velocities” determined by the known [Formula: see text ...
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Free-surface velocity measurements using an optically recording velocity interferometer
SPIE Proceedings, 2007An optically recording velocity interferometer system (ORVIS) was developed for the free-surface velocity measurements in the equation of state experiments. The time history of free-surface velocity and the particle velocity in laser deduced shockwaves experiments can be recorded by the electronic streak camera in ORVIS.
Jian-xin Lu +7 more
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