Results 261 to 270 of about 10,332,665 (292)

Energy transport in dispersive media and superluminal group velocities

Physics Letters A, 1997
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Negative group-velocity dispersion using refraction

Journal of the Optical Society of America A, 1984
It is shown that a negative contribution to the group-velocity dispersion always accompanies angular dispersion. We describe structures, such as slabs and prisms, that use this contribution to provide adjustable group-velocity dispersion. We discuss, in particular, considerations regarding incorporation of these structures with a laser resonator.
O. E. Martinez, J. P. Gordon, R. L. Fork
openaire   +1 more source

Causality and acoustic group velocity in dispersive media

The Journal of the Acoustical Society of America, 2005
This talk examines two specific issues related to causality and the group velocity of acoustic pulses in dispersive media. First, the causal prediction of group velocity from attenuation with finite-bandwidth Kramers-Kronig (K-K) relations is discussed.
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Weakly nonlinear dispersive waves: group velocity

Journal of Plasma Physics, 1982
For slowly varying wave trains in a linear system, it is known that a quantity proportional to the square of the amplitude propagates with the group velocity. It is shown here, by considering a specific problem of longitudinal waves in a hot electron-plasma and using an asymptotic analysis, that this result continues to be valid even when weak ...
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Group velocity and nonlinear dispersive wave propagation

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1973
Abstract By the use of a Hamiltonian formulation, a basic group velocity is defined as the derivative of frequency with respect to wavenumber keeping action density constant, and is shown to represent an incremental action velocity in the general nonlinear case.
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Retrieving S-wave velocity from surface wave multimode dispersion curves with DispINet

Journal of Applied Geophysics, 2021
Lei Fu, Qingbo Ma, Lei Pan
exaly  

CWT-Based Method for Extracting Seismic Velocity Dispersion

IEEE Geoscience and Remote Sensing Letters, 2022
Yijie Zhang, Haixia Zhao
exaly  

Effects of Velocity and Permeability on Tracer Dispersion in Porous Media

Applied Sciences (Switzerland), 2021
Tongjing Liu, Pengxiang Diwu, Zhenjiang You   +2 more
exaly  

GROUP-VELOCITY DISPERSION

1989
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Estimation of the Longitudinal Dispersion Coefficient Using the Velocity Profile in Natural Streams

Journal of Hydraulic Engineering, 2004
Kyong Oh Baek, Il Won Seo
exaly