Results 1 to 10 of about 13,447,510 (348)

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.
Lozanov, Kaloian D.   +9 more
core   +7 more sources

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

Almost sure subexponential decay rates of scalar Itô-Volterra equations [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2004
The paper studies the subexponential convergence of solutions of scalar Itô-Volterra equations. First, we consider linear equations with an instantaneous multiplicative noise term with intensity $\sigma$. If the kernel obeys \[ \lim_{t \rightarrow\infty}
John Appleby
doaj   +2 more sources

Beta-decay rates [PDF]

open access: yesNuclear Physics A, 2006
Major astrophysical applications involve a huge number of exotic nuclei. Their beta-decay properties play a crucial role in stellar explosive events. An important effort has been developed in last decades to measure the masses and β-decay properties of ...
Borzov, Ivan
core   +2 more sources

Spontaneous Decay Rates In Active Waveguides. [PDF]

open access: yesOptics Letters, 2015
We present a new method of measuring the guided, radiated, and total decay rates in uniform waveguides. It is also shown theoretically that large modifications of the total decay rate can be achieved in realistic erbium-doped fiber amplifiers and erbium ...
Rieznik, Andrés Anibal   +1 more
core   +6 more sources

Decay rates of Volterra equations on ℝN

open access: yesOpen Mathematics, 2007
This note is concerned with the linear Volterra equation of hyperbolic type $$\partial _{tt} u(t) - \alpha \Delta u(t) + \int_0^t {\mu (s)\Delta u(t - s)} ds = 0$$ on the whole space ℝN. New results concerning the decay of the associated energy as time goes to infinity were established.
Conti Monica   +2 more
doaj   +3 more sources

Inverse method for estimating respiration rates from decay time series [PDF]

open access: yesBiogeosciences, 2012
Long-term organic matter decomposition experiments typically measure the mass lost from decaying organic matter as a function of time. These experiments can provide information about the dynamics of carbon dioxide input to the atmosphere and controls ...
D. C. Forney, D. H. Rothman
doaj   +3 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

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