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Understanding spaced-receiver zonal velocity estimation
(American Geophysical Union, 2004-10-27)
Spaced-receiver analysis can be used to estimate the ionospheric zonal irregularity velocity. This involves first measuring the scintillation pattern velocity and then estimating the zonal irregularity velocity. A ...
Single-shot velocity mapping by rewinding of velocity encoding with Echo-Planar Imaging
(Academic Press Inc Elsevier Science, 2019-10)
The ability of single-shot NMR imaging methods to follow the time evolution of a velocity distribution within an object is strongly limited by the phase errors accumulated as velocity maps are acquired. In the particular ...
A new condition to identify isotropic dielectric-magnetic materials displaying negative phase velocity
(John Wiley & Sons Inc, 2004-12)
A new condition for characterizing isotropic materials with negative phase velocity was derived. The equivalence between this condition and its predecessors was also studied. A linear isotropic dielectric-magnetic medium ...
The impact of electronic payment systems on the velocity of money circulation
(Universidad del Zulia, 2019)
Theoretical relationship between maximum value of the post-sunset drift velocity and peak-to-valley ratio of anomaly TEC
(American Geophysical Union, 2004-02-11)
Theoretical study of electron density distribution in the nighttime equatorial ionosphere shows that linear relationships with statistically significant correlation coefficients exist between the maximum value of the ...
Effect of radial velocity profiles on axial dispersion in packed beds: asymptotic behaviour
(Brazilian Society of Chemical Engineering, 2021-09)
Axial dispersion of a solute in a flow through packed beds arises from molecular diffusion, velocity variations at the interstitial-pore scale and systematic radial velocity profiles. Currently, there is not a widely ...
Finite-velocity diffusion in the presence of a force
(IOP Publishing, 2021-03)
We have studied a Cattaneo-Fick diffusion process in the presence of a deterministic force. Specifically, analytic results for the stationary probability distribution are solved for stable and unstable potentials. It is ...
Diffraction gratings of isotropic negative-phase velocity materials
(Elsevier Gmbh, 2005-12)
Diffraction of electromagnetic plane waves by the gratings made by periodically corrugating the exposed planar boundaries of homogeneous, isotropic, linear dielectric-magnetic half-spaces is examined. The phase velocity ...
Fermi velocity reduction in graphene due to enhanced vacuum fluctuations
(IOP Publishing, 2021-09)
It is well known that the confinement of matter inside a microcavity can significantly enhance the light-matter interactions. As a result the vacuum fluctuations, induced by virtual photons, can occur in a volume much lower ...