Results 61 to 70 of about 356 (177)

Differential Laguerre geometry of plane curves

open access: yesJapanese journal of mathematics :transactions and abstracts, 1941
Not ...
openaire   +3 more sources

On convergence of the close-coupling method for calculating electron–hydrogen ionization

open access: yes, 2003
Substantially larger calculations than previously possible are performed to examine how the convergent close-coupling method converges in the case of electron-impact ionization of atomic hydrogen. By studying the case of 27.2 eV incident electron energy,
Bray, I.
core  

On the Liouvillian solutions to the perturbation equations of the Schwarzschild black hole

open access: yes, 2018
It is well known that the equations governing the evolution of scalar, electromagnetic, and gravitational perturbations of the background geometry of a Schwarzschild black hole can be reduced to a single master equation.
Evangelos Melas, Melas, E.
core   +1 more source

Non-representable hyperbolic matroids

open access: yes, 2018
The generalized Lax conjecture asserts that each hyperbolicity cone is a linear slice of the cone of positive semidefinite matrices. Hyperbolic polynomials give rise to a class of (hyperbolic) matroids which properly contains the class of matroids ...
Amini, Nima,, Brändén, Petter,
core   +1 more source

Coupled atomic wires in a synthetic magnetic field

open access: yes, 2017
We propose and study systems of coupled atomic wires in a perpendicular synthetic magnetic field as a platform to realize exotic phases of quantum matter.
Budich, J.   +13 more
core   +1 more source

Spatiooral coherence mapping of few-cycle vortex pulses

open access: yes, 2014
Light carrying an orbital angular momentum (OAM) displays an optical phase front rotating in space and time and a vanishing intensity, a so-called vortex, in the center.
Elsaesser, T., Bock, M., Grunwald, R.
core   +1 more source

Performance improvement of meshless methods for practical time domain electromagnetic analyses.

open access: yes, 2021
Solution of Maxwell's equations for practical antennas, filters, waveguides and other microwave devices requires use of numerical methods. Popular numerical methods include the finite difference time domain method (FDTD), finite element method (FEM),
Sripada, Aditya Sivaram
core  

A Finite Element Interior Penalty Method for MHD in heterogeneous domains

open access: yes, 2006
The Maxwell equations in the MHD limit in heterogeneous domains composed of conducting and nonconducting regions are solved by using Lagrange finite elements and by enforcing continuities across interfaces using an interior penalty technique.
Nore, C. (author)   +3 more
core  

Use of surface waves and seismic refraction for the inspection of circular concrete structures

open access: yes, 2006
International audienceIn this paper, the propagation of both longitudinal and surface waves will be investigated within the scope of seismic measurements recorded along the circumference of concave structures.
Abraham, Odile   +6 more
core   +1 more source

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