Results 1 to 10 of about 849,846 (204)

Extracting microplastic decay rates from field data [PDF]

open access: yesScientific Reports, 2022
Being able to estimate and predict future microplastic distributions in the environment is one of the major challenges of the rapidly developing field of microplastic research.
T. Metz, M. Koch, P. Lenz
doaj   +2 more sources

Global existence and decay rates of solutions for Vlasov–Navier–Stokes–Fokker–Planck equations with magnetic field

open access: yesMathematics Open, 2023
In this paper, we consider the two-phase flow model coupled by the incompressible magnetohydrodynamic equations and the discrete-phase (particle) dynamics equation Vlasov–Fokker–Planck in [Formula: see text].
Yingcong Song
doaj   +1 more source

On the Validity of the Relationship 1/T = 1/TB+1/TS+1/TD in NMR Techniques With Regards to Permeability Estimation of Natural Porous Media

open access: yesFrontiers in Earth Science, 2021
One of the most relevant feature of geophysical techniques based on nuclear magnetic resonance is their ability to estimate the permeability of natural porous media, since other geophysical techniques, as the use of the formation factor and neutron well ...
Jesús Díaz-Curiel   +4 more
doaj   +1 more source

The decay rates of solutions to a chemotaxis-shallow water system

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
In this paper, we consider the large time behavior of solution for the chemotaxis-shallow water system in $\mathbb{R}^2$. The lower bound for time decay rates of the bacterial density and the chemoattractant concentration are proved by the method of ...
Yanqiu Huang, Qiang Tao
doaj   +1 more source

Classical decay rates of oscillons [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2020
Oscillons are extremely long-lived, spatially-localized field configurations in real-valued scalar field theories that slowly lose energy via radiation of scalar waves. Before their eventual demise, oscillons can pass through (one or more) exceptionally stable field configurations where their decay rate is highly suppressed.
Zhang, H.   +4 more
openaire   +4 more sources

Evolutions of equatorial ring current ions during a magnetic storm

open access: yesEarth and Planetary Physics, 2020
In this paper, we present evolutions of the phase space density (PSD) spectra of ring current (RC) ions based on observations made by Van Allen Probe B during a geomagnetic storm on 23–24 August 2016.
Zheng Huang, ZhiGang Yuan, XiongDong Yu
doaj   +1 more source

Differential decay rate for B → πlν semileptonic decays [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 2001
Abstract We present our study on B → π l ν semileptonic decay form factors using NRQCD action for heavy quark. In the analysis, we use the form factors f 1 (υ· k π ) and f 2 (υ· k π ) defined in the context of heavy quark effective theory by Burdman et al. .
JLQCD Collaboration   +17 more
openaire   +3 more sources

Reaction–diffusion with stochastic decay rates [PDF]

open access: yesPhysical Chemistry Chemical Physics, 2017
Microscopic physical and chemical fluctuations in a reaction–diffusion system lead to anomalous chemical kinetics and transport on the mesoscopic scale. Emergent non-Markovian effects lead to power-law reaction times and localization of reacting species.
G. John Lapeyre, Marco Dentz
openaire   +4 more sources

Classification of convergence rates of solutions of perturbed ordinary differential equations with regularly varying nonlinearity

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
In this paper we consider the rate of convergence of solutions of a scalar ordinary differential equation which is a perturbed version of an autonomous equation with a globally stable equilibrium.
John Appleby, Denis Patterson
doaj   +1 more source

Polynomial decay rate for a new class of viscoelastic Kirchhoff equation related with Balakrishnan-Taylor dissipation and logarithmic source terms

open access: yesAlexandria Engineering Journal, 2020
In this paper, a polynomial decay rate of Kirchhoff’s nonlinear viscoelastic viscoelastic equation solution related with Balakrishnan-Taylor dissipation solution and logarithmic source terms is obtained, where we obtain the result of energy decay of ...
Salah Boulaaras
doaj   +1 more source

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