Results 31 to 40 of about 16,466,590 (349)
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
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Experimental verification of stress-wave bands and negative phase velocity in layered media [PDF]
Theoretical and Applied Mechanics, 2011 Based on a robust numerical method for calculation of band structure for stress-waves in heterogeneous media, a layered composite was designed and fabricated.
Amirkhizi Alireza V., Nemat-Nasser Sia
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Ionospheric D Region Remote Sensing Using ELF Sferic Group Velocity
Geophysical Research Letters, 2018 The lowest region of the ionosphere, the D region, plays an important role in magnetosphere‐ionosphere coupling but is challenging to directly observe.
M. Gołkowski +7 more
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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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Foreshadowing elastic instabilities by negative group velocity in soft composites
Applied Physics Letters, 2018 We reveal the existence of a state in soft composites, characterized by the omni-directional negative group velocity in the vicinity of elastic instability.
V. Slesarenko +4 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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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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Differential Kernels for Group Velocity [PDF]
Geophysical Journal International, 1976 Summary It is shown that the wavenumber dcrivative of the dispersion relation, dω(k)/dk, is a Frkchet differentiable gross Earth datum. The differential kernel functions are given explicitly as expressions quadratic in the normal mode eigenfknctions and their wavenumber derivatives.
openaire +2 more sources
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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Manipulation of Group-Velocity-Locked Vector Solitons From Fiber Lasers
IEEE Photonics Journal, 2016 Manipulation of group-velocity-locked vector solitons (GVLVSs) is numerically proposed and experimentally demonstrated. A pseudo-high-order GVLVS could be generated from a fundamental GVLVS with the help of a polarization-resolved system. Specifically, a
Xinxin Jin +8 more
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