Results 41 to 50 of about 532,284 (336)

Group Line Energy in Phase-Resolved Ocean Surface Wave Orbital Velocity Reconstructions from X-band Doppler Radar Measurements of the Sea Surface

open access: yesRemote Sensing, 2019
The wavenumber-frequency spectra of many radar measurements of the sea surface contain a linear feature at frequencies lower than the first order dispersion relationship commonly referred to as the “group line”.
Andrew J. Kammerer, Erin E. Hackett
doaj   +1 more source

Direct Calculation of the Group Velocity for Two-Dimensional Complex, Composite and Periodic Structures Using a Wave and Finite Element Scheme

open access: yesApplied Sciences, 2021
Guided waves have immense potential for structural health monitoring applications in numerous industries including aerospace. It is necessary to evaluate guided wave dispersion characteristics, i.e., group velocity and phase velocity profiles, for using ...
Muhammad Khalid Malik   +2 more
doaj   +1 more source

Optical tsunamis: shoaling of shallow water rogue waves in nonlinear fibers with normal dispersion [PDF]

open access: yes, 2013
In analogy with ocean waves running up towards the beach, shoaling of prechirped optical pulses may occur in the normal group-velocity dispersion regime of optical fibers. We present exact Riemann wave solutions of the optical shallow water equations and
Wabnitz, Stefan
core   +2 more sources

IMAGING DISPERSION CURVE OF DISPERSIVE WAVES USING SHORT-TIME FOURIER TRANSFORM: 2025 MYANMAR EARTHQUAKE M 7.7

open access: yesJGE
Understanding of Earth's subsurface is crucial for mitigating geological hazards, particularly earthquakes. A key parameter for subsurface characterization is the surface wave dispersion curve, which strongly reflects shear wave velocity (Vs) at various ...
Muhammad Fachrul Rozi Kurniawan   +2 more
doaj   +1 more source

Understanding Dispersion of Revolver-Type Anti-Resonant Hollow Core Fibers

open access: yesFibers, 2018
Here, we analyze the dispersion behavior of revolver-type anti-resonant hollow core fibers, revealing that the chromatic dispersion of this type of fiber geometry is dominated by the resonances of the glass annuluses, whereas the actual arrangement of ...
Matthias Zeisberger   +2 more
doaj   +1 more source

S‐Wave Velocity Structure of the Sichuan‐Yunnan Region, China: Implications for Extrusion of Tibet Plateau and Seismic Activities

open access: yesEarth and Space Science, 2021
The Sichuan‐Yunnan region is located at the intersection between the South China Block, the Indian plate, and the Tibet Plateau and is crisscrossed with deep and large faults and is characterized by strong seismic activities and the extrusion of the ...
Haoyu Tian, Chuansong He, M. Santosh
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

Subluminal group velocity and dispersion of Laguerre Gauss beams in free space

open access: yesScientific Reports, 2016
That the speed of light in free space c is constant has been a pillar of modern physics since the derivation of Maxwell and in Einstein’s postulate in special relativity. This has been a basic assumption in light’s various applications.
N. Bareza, N. Hermosa
semanticscholar   +1 more source

Velocity Fields in Non--Gaussian Cold Dark Matter Models [PDF]

open access: yes, 1994
We analyse the large--scale velocity field obtained by N--body simulations of cold dark matter (CDM) models with non--Gaussian primordial density fluctuations, considering models with both positive and negative primordial skewness in the density ...
Lucchin, F.   +4 more
core   +3 more sources

Identification of microstructured materials by phase and group velocities

open access: yesMathematical Modelling and Analysis, 2009
An inverse problem to determine parameters of microstructured solids by means of group and phase velocities of wave packets is studied. It is proved that in the case of normal dispersion the physical solution is unique and in the case of anomalous ...
Jaan Janno, Jüri Engelbrecht
doaj   +1 more source

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