Results 31 to 40 of about 10,254,059 (313)
Antea Group Archeologie 2020/159
, 2021 In augustus 2020 – maart 2021 heeft Antea Group een archeologisch bureauonderzoek en inventariserend veldonderzoek uitgevoerd ter voorbereiding op het verleggen van een DN400 drinkwaterleiding in Ewijk, gemeente Beuningen.
Fens, R.L. (Antea Group) +1 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
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
doaj +1 more source
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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Some Theorems in Group Velocity [PDF]
Proceedings of the Edinburgh Mathematical Society, 1956 We consider a medium in which the equation satisfied by a disturbance ø(x,t) is capable of solutions of the form sin(vx—wt), with v and ω real but not necessarily of the same sign. If the phase velocity U = ω/v is not of constant magnitude the medium is said to be dispersive, and the group velocity V may conveniently be defined as dω/v, an expression ...
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Study on the ultra-wide band gap characteristics of novel star-shaped chiral metamaterials
Hangkong gongcheng jinzhanThe suppression of vibration and noise has always been an important issue in engineering，and metamaterials have shown significant application value in vibration and noise reduction.
WANG Shuo +7 more
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Group velocity mismatch at ultrashort electromagnetic pulse propagation in nonlinear metamaterials
Open Physics, 2019 The parametric interaction of optical wave pulses in metamaterials is considered in the first approximation of the theory of dispersion. The interaction between the quasi-monochromatic pump wave and the wave pulse at the total frequency with quadratic ...
Kasumova Rena J. +2 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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Antea Group Archeologie 2019/164
, 2020 projectnummer 456639 rapportvolgnummer 2019/164 De aanleiding tot het uitvoeren van dit bureauonderzoek en inventariserend veldonderzoek door middel van boringen is de voorgenomen sanering c.q.
Fens, R. (Antea Group) +9 more
core +1 more source