Results 21 to 30 of about 1,274,578 (287)
Surface-wave group-delay and attenuation kernels [PDF]
, 2006 We derive both 3-D and 2-D Fréchet sensitivity kernels for surface-wave group-delay and anelastic attenuation measurements. A finite-frequency group-delay exhibits 2-D off-ray sensitivity either to the local phase-velocity perturbation δc/c or to its ...
Dahlen, F. A., Zhou, Ying
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About the envelope of the wave packet (pulse) [PDF]
Известия Саратовского университета. Новая серия: ФизикаBackground and Objectives: The methodological work considers the issues of the velocities and times of propagation of wave packets (pulses) through a medium layer of thickness d with dispersion.
Davidovich, Mikhail Vladimirovich
doaj +1 more source
Applied Sciences, 2021 Nonlinear Lamb waves have attracted increasing attention for detecting and identifying microstructural changes in structural health monitoring. However, most identification methods that determine the damage locations based on the intersections of the ...
Jichao Xu +4 more
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Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides [PDF]
, 2009 We investigate the nonlinear response of photonic crystal waveguides with suppressed two-photon absorption. A moderate decrease of the group velocity (~ c/6 to c/15, a factor of 2.5) results in a dramatic (30x) enhancement of three-photon absorption well
Aitchison +42 more
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VLF/LF Lightning Location Based on LWPC and IRI Models: A Quantitative Study
Remote Sensing, 2022 The group velocity of lightning electromagnetic signals plays an important role in lightning location systems using the time difference of arrival (TDOA) method.
Xin Xu +5 more
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M31 Transverse Velocity and Local Group Mass from Satellite Kinematics [PDF]
, 2008 We present several different statistical methods to determine the transverse velocity vector of M31. The underlying assumptions are that the M31 satellites on average follow the motion of M31 through space, and that the galaxies in the outer parts of the
Dunn A. M. +8 more
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Frontiers in Physics, 2021 Shear wave dispersion (variation of phase velocity with frequency) occurs in tissues with layered and anisotropic microstructure and viscous components, such as the uterine cervix.
Abel Torres +4 more
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Laser Ion Acceleration in a Near Critical Density Trap
Photonics, 2022 In order to accelerate ions by a laser, we go back to the original and the fundamental idea of how longitudinal field structure generation can be carried out in an ionized media and how particles may be trapped by the created wakefield.
Ales Necas +3 more
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On the motion of the Local Group and its substructures [PDF]
, 1998 The problem of the relative motion of the substructures of the Local Group of galaxies revealed via S-tree method, as well as of the velocity of the Local Group itself, is considered.
Gurzadyan, V. G., Rauzy, S.
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Alfvén waves: To the 80th anniversary of discovery
Solar-Terrestrial Physics, 2022 The article is dedicated to the anniversary of the discovery of Alfvén waves. The concept of Alfvén waves has played an outstanding role in the formation and development of cosmic electrodynamics.
Guglielmi A. V. +2 more
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