Results 91 to 100 of about 4,843 (209)

Eikonal Approximation for Coupled Equations for Multichannel Scattering

, 1972
It is well known that the Glauber approximation for scattering amplitudes is obtained by applying the eikonal approximation to the Fourier transform of the transition operator.
Peacher, Jerry, Watson, Kenneth M., Ling, Rung T., Chen, Joseph C.Y.   +3 more
core   +1 more source

Parametrization of activation based cardiac electrophysiology models using bidomain model simulations

Current Directions in Biomedical Engineering, 2016
Eikonal models are useful to compute approximate solutions of cardiac excitation propagation in a computationally efficient way. In this work the underlying conduction velocities for different cell types were computed solving the classical bidomain model
Stender Birgit
doaj   +1 more source

Bounded-From-Below Solutions of the Hamilton-Jacobi Equation for Optimal Control Problems with Exit Times: Vanishing Lagrangians,

, 2008
We study the Hamilton-Jacobi equation for undiscounted exit time control problems with general nonnegative Lagrangians using the dynamic programming approach.
Eikonal Equations
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Eikonal slant helices and Eikonal Darboux helices in 3-dimensional Riemannian manifold

In this study, we give the definitions and characterizations of Eikonal slant helices, Eikonal Darboux helices and non-modified Eikonal Darboux helices in 3-dimensional Riemannian manifold M-3.
Önder, M, Kaya, O, Ziplar, E
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Numerical analysis of eikonal equation

The Maxwell equations have a fairly simple form. However, finding solutions of Maxwell's equations is an extremely difficult task. Therefore, various simplifying approaches are often used in optics.
Korolkova A.V., Velieva T.R., Kulyabov D.S., Gevorkyan M.N.   +3 more
core   +1 more source

Eikonal amplitudes on the celestial sphere

Journal of High Energy Physics
Celestial scattering amplitudes for massless particles are Mellin transforms of momentum-space scattering amplitudes with respect to the energies of the external particles, and behave as conformal correlators on the celestial sphere.
Tim Adamo, Wei Bu, Piotr Tourkine, Bin Zhu   +3 more
doaj   +1 more source

Positronium-formation cross sections in the eikonal approximation

, 1988
Positronium-formation cross sections have been studied in the framework of the eikonal approximation, where the boundary condition has been properly satisfied, taking consistent account of the internuclear potential term both in the eikonal phase and in
N. C. Sil, C. Sinha, S. Tripathi
core   +1 more source

Integral of the double-emission eikonal function for a massive and a massless emitter at an arbitrary angle

Journal of High Energy Physics
We present an analytic calculation of the integrated double-emission eikonal function of a massive and a massless emitter whose momenta are at an arbitrary angle to each other.
Dennis Horstmann, Kirill Melnikov, Ming-Ming Long, Andrey Pikelner   +3 more
doaj   +1 more source

Eikonal Equation 0.1

, 2023
We provide a review of some symmetry-related literature on the eikonal equations $u_\mu u_\mu =0$,$u_\mu u_\mu =1$, where lower indices at dependent variables designate derivatives, $\mu=0,1,2,..,n$ and summation is implied over the repeated indices.
Yehorchenko, Iryna
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Eikonal approximation in the transition radiation theory

, 2020
yesSimple variant of eikonal approximation in transition radiation theory is proposed. Spectral-angular density of radiation on fiber-like targets and nanotubes is calculated using Born and eikonal approximations.
Syshchenko, V. V., Shulga, N. F.
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