Results 21 to 30 of about 243,543 (330)

Thermal Effect on Elastic Waves of Anisotropic Saturated Porous Solid

open access: yesModelling and Simulation in Engineering, 2011
The motion equations of anisotropic media, coupled to the mass conservation and thermoequilibrium equations of fluid, are studied here based on the standard space of physical presentation for thermoelastic dynamics of anisotropic saturated porous solids.
S. H. Guo
doaj   +1 more source

Gravitational decoupled anisotropies in compact stars

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
Simple generic extensions of isotropic Durgapal–Fuloria stars to the anisotropic domain are presented. These anisotropic solutions are obtained by guided minimal deformations over the isotropic system.
Luciano Gabbanelli   +2 more
doaj   +1 more source

Large-scale cosmological perturbations on the brane [PDF]

open access: yes, 2000
In brane-world cosmologies of Randall-Sundrum type, we show that evolution of large-scale curvature perturbations may be determined on the brane, without solving the bulk perturbation equations.
A. Lukas   +38 more
core   +3 more sources

A Liouville type theorem for a class of anisotropic equations

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016
In this paper we are dealing with entire solutions of a general class of anisotropic equations. Under some appropriate conditions on the data, we show that the corresponding equations cannot have non-trivial positive solutions bounded from above.
Barbu Luminiţa, Enache Cristian
doaj   +1 more source

Propagation of electromagnetic waves in anisotropic magnetoelectric medium

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2019
In the article we consider porpagation and interaction of electromagnetic waves of different polarization, in anisotropic medium that is inhomogeneous along the Z axis with magnetoelectric effect of tetragonal, trigonal, and hexagonal symmetries are ...
S.K. Tleukenov   +2 more
doaj   +1 more source

Maximum principles, Liouville-type theorems and symmetry results for a general class of quasilinear anisotropic equations

open access: yesAdvances in Nonlinear Analysis, 2016
This paper is concerned with a general class of quasilinear anisotropic equations. We first derive some maximum principles for two appropriate P-functions, in the sense of Payne (see the book of Sperb [18]).
Barbu Luminita, Enache Cristian
doaj   +1 more source

Minimal Geometric Deformation: the inverse problem

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
In this paper we show that any static and spherically symmetric anisotropic solution of the Einstein field equations can be thought as a system sourced by certain deformed isotropic system in the context of Minimal Geometric Deformation-decoupling ...
Ernesto Contreras
doaj   +1 more source

Reflectionless anisotropic multilayers for both polarisations at grazing incidence

open access: yesEPJ Applied Metamaterials, 2022
We find a method for designing anisotropic multilayer profiles that are reflectionless at grazing incidence, for both electromagnetic polarisations.
Patient Dean A., Horsley Simon A.R.
doaj   +1 more source

Compact anisotropic models in general relativity by gravitational decoupling

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
Durgapal’s fifth isotropic solution describing spherically symmetric and static matter distribution is extended to an anisotropic scenario. To do so we employ the gravitational decoupling through the minimal geometric deformation scheme.
E. Morales, Francisco Tello-Ortiz
doaj   +1 more source

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