Results 21 to 30 of about 391,786 (268)

Minimality conditions for wave speed in anisotropic smectic C liquid crystals [PDF]

open access: yesMathematical Methods in the Applied Sciences, 2017
We discuss minimality conditions for the speed of monotone travelling waves in a sample of smectic C∗ liquid crystal subject to a constant electric field, dealing with both isotropic and anisotropic cases. Such conditions are important in understanding the properties of domain wall switching across a smectic layer, and our focus here is on examining ...
Elaine C. M. Crooks   +2 more
openaire   +3 more sources

Spreading Speed, Traveling Waves, and Minimal Domain Size in Impulsive Reaction–Diffusion Models [PDF]

open access: yesBulletin of Mathematical Biology, 2012
How growth, mortality, and dispersal in a species affect the species' spread and persistence constitutes a central problem in spatial ecology. We propose impulsive reaction-diffusion equation models for species with distinct repro- ductive and dispersal stages.
Lewis, Mark A., Li, Bingtuan
openaire   +4 more sources

Generalized Horndeski-like Einstein Gauss-Bonnet inflation with massless primordial gravitons

open access: yesNuclear Physics B, 2021
In this work we shall introduce a theoretical framework comprised by a non-minimal coupled canonical scalar field, a non-minimal coupling to the Gauss-Bonnet invariant and a non-minimal kinetic coupling.
V.K. Oikonomou, F.P. Fronimos
doaj   +1 more source

Travelling waves in a nonlocal reaction-diffusion equation as a model for a population structured by a space variable and a phenotypical trait [PDF]

open access: yes, 2012
We consider a nonlocal reaction-diffusion equation as a model for a population structured by a space variable and a phenotypical trait. To sustain the possibility of invasion in the case where an underlying principal eigenvalue is negative, we ...
Alfaro, Matthieu   +2 more
core   +3 more sources

A weakly nonlinear Alfvénic pulse in a transversely inhomogeneous medium [PDF]

open access: yes, 2001
The interaction of a weakly nonlinear Alfvénic pulse with an Alfvén speed inhomogeneity in the direction perpendicular to the magnetic field is investigated.
Abdelatif   +28 more
core   +4 more sources

Sensitivity limitations in optical speed meter topology of gravitational-wave antennae [PDF]

open access: yes, 2003
The possible design of QND gravitational-wave detector based on speed meter principle is considered with respect to optical losses. The detailed analysis of speed meter interferometer is performed and the ultimate sensitivity that can be achieved is ...
B. Huttner   +20 more
core   +1 more source

Wave propagation in a diffusive SEIR epidemic model with nonlocal transmission and a general nonlinear incidence rate

open access: yesBoundary Value Problems, 2021
We introduce a diffusive SEIR model with nonlocal delayed transmission between the infected subpopulation and the susceptible subpopulation with a general nonlinear incidence.
Xin Wu, Zhaohai Ma
doaj   +1 more source

Spreading Speed in A Nonmonotone Equation with Dispersal and Delay

open access: yesMathematics, 2019
This paper is concerned with the estimation of spreading speed of a nonmonotone equation, which involves time delay and nonlocal dispersal. Due to the time delay, this equation does not generate monotone semiflows when the positive initial value is given.
Xi-Lan Liu, Shuxia Pan
doaj   +1 more source

Existence and Nonexistence of Traveling Wave Solutions for a Reaction–Diffusion Preys–Predator System with Switching Effect

open access: yesAdvances in Mathematical Physics, 2023
In this paper, we are concerned with traveling wave solutions for two preys–one predator system with switching effect. First, we discuss that there is no traveling wave solution for this system by using linearization method.
Hang Zhang, Yujuan Jiao, Jinmiao Yang
doaj   +1 more source

Travelling-wave analysis of a model describing tissue degradation by bacteria

open access: yes, 2007
We study travelling-wave solutions for a reaction-diffusion system arising as a model for host-tissue degradation by bacteria. This system consists of a parabolic equation coupled with an ordinary differential equation.
Hilhorst, Danielle   +2 more
core   +1 more source

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