Results 21 to 30 of about 445,110 (284)

Conservation Laws for a Variable Coefficient Variant Boussinesq System

open access: yesAbstract and Applied Analysis, 2014
We construct the conservation laws for a variable coefficient variant Boussinesq system, which is a third-order system of two partial differential equations. This system does not have a Lagrangian and so we transform it to a system of fourth-order, which
Ben Muatjetjeja, Chaudry Masood Khalique
doaj   +1 more source

Searching for Conservation Laws in Brain Dynamics—BOLD Flux and Source Imaging

open access: yesEntropy, 2014
Blood-oxygen-level-dependent (BOLD) imaging is the most important noninvasive tool to map human brain function. It relies on local blood-flow changes controlled by neurovascular coupling effects, usually in response to some cognitive or perceptual task ...
Henning U. Voss, Nicholas D. Schiff
doaj   +1 more source

Conservation Laws for Some Systems of Nonlinear Partial Differential Equations via Multiplier Approach

open access: yesJournal of Applied Mathematics, 2012
The conservation laws for the integrable coupled KDV type system, complexly coupled kdv system, coupled system arising from complex-valued KDV in magnetized plasma, Ito integrable system, and Navier stokes equations of gas dynamics are computed by ...
Rehana Naz
doaj   +1 more source

Local Conservation Laws and the Structure of the Many-Body Localized States [PDF]

open access: yesPhysical Review Letters, 2013
We construct a complete set of local integrals of motion that characterize the many-body localized (MBL) phase. Our approach relies on the assumption that local perturbations act locally on the eigenstates in the MBL phase, which is supported by numerical simulations of the random-field XXZ spin chain.
Serbyn, Maksym   +2 more
openaire   +4 more sources

Exponentially fitted methods with a local energy conservation law

open access: yesAdvances in Computational Mathematics, 2023
AbstractA new exponentially fitted version of the discrete variational derivative method for the efficient solution of oscillatory complex Hamiltonian partial differential equations is proposed. When applied to the nonlinear Schrödinger equation, this scheme has discrete conservation laws of charge and energy.
Conte D., Frasca Caccia G.
openaire   +4 more sources

Laws that Protect Florida’s Wildlife

open access: yesEDIS, 2012
Endangered species are not the only wildlife protected by the legal system. All of Florida’s wildlife is more or less safeguarded by a variety of laws. Laws addressing wildlife can be found at the federal, state, regional, and local levels of government.
Joe Schaefer, John Tucker, Maia McGuire
doaj   +5 more sources

Conservation laws for a viscoelastic medium

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2019
In this paper we consider a first order quasilinear non homogenoeus hyperbolic system describing viscoelastic processes. A full classification of first order local conservation laws admitted by such a rate-type model has been given.
Natale Manganaro
doaj   +1 more source

A Godunov type scheme for a class of LWR traffic flow models with non-local flux

open access: yesNetworks and Heterogeneous Media, 2018
We present a Godunov type numerical scheme for a class of scalar conservation laws with non-local flux arising for example in traffic flow models. The proposed scheme delivers more accurate solutions than the widely used Lax-Friedrichs type scheme.
Jan Friedrich   +2 more
doaj   +1 more source

Scalar conservation laws with rough (stochastic) fluxes [PDF]

open access: yes, 2013
We develop a pathwise theory for scalar conservation laws with quasilinear multiplicative rough path dependence, a special case being stochastic conservation laws with quasilinear stochastic dependence.
Lions, Pierre-Louis   +2 more
core   +4 more sources

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