Results 61 to 70 of about 2,979 (136)

Global Validation of the Data‐Assimilative VERB‐3D Code for the Radiation Belts

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract Electrons within Earth's radiation belts exhibit large variability in space and time during geomagnetic storms, which could potentially damage satellites and harm astronauts in space. Physics‐based models describe the evolution of energetic electrons in the radiation belts, but they may suffer from uncertainties and errors, particularly in the
Marina García Peñaranda   +12 more
wiley   +1 more source

The Range‐Resident Logistic Model: A New Framework to Formalise the Population‐Dynamics Consequences of Range Residency

open access: yesEcology Letters, Volume 28, Issue 12, December 2025.
We introduce the range‐resident logistic model, an extension of the spatial logistic model that incorporates empirically supported range‐resident movement, showing that neglecting range residency can lead to under‐ or overestimating population carrying capacity.
Rafael Menezes   +4 more
wiley   +1 more source

Subspace Approximations to the Focused Transport Equation of Energetic Particles, I. The Standard Form

open access: yesThe Open Journal of Astrophysics
The Fokker-Planck equation describing the transport of energetic particles interacting with turbulence is difficult to solve analytically. Numerical solutions are of course possible but they are not always useful for applications.
B. Klippenstein, A. Shalchi
doaj   +1 more source

Keller–Segel type approximation for nonlocal Fokker–Planck equations in one-dimensional bounded domain

open access: yesEuropean Journal of Applied Mathematics
Numerous evolution equations with nonlocal convolution-type interactions have been proposed. In some cases, a convolution was imposed as the velocity in the advection term.
Hideki Murakawa, Yoshitaro Tanaka
doaj   +1 more source

Interpolating Electron Diffusion Coefficients in Earth's Radiation Belts: A Neural Network Model Inspired by Video Frame Interpolation

open access: yesSpace Weather, Volume 23, Issue 11, November 2025.
Abstract Many numerical models have been built to uncover the physical mechanisms governing radiation belt dynamics and enable real‐time forecasting. The diffusion coefficient, as a critical input for these models, is usually obtained through linear interpolation from precomputed diffusion coefficient libraries.
Jianhang Wang   +7 more
wiley   +1 more source

Generalized Fokker-Planck Equation for the Modified Landau-Lifshitz Equation with Poisson White Noise [PDF]

open access: yesЖурнал нано- та електронної фізики, 2013
Using the modified stochastic Landau-Lifshitz equation driven by Poisson white noise, we derive the generalized Fokker-Planck equation for the probability density function of the nanoparticle magnetic moment.
S.I. Denisov, O.O. Bondar
doaj  

Quantum transport equations for Bose systems taking into account nonlinear hydrodynamic processes

open access: yesCondensed Matter Physics, 2014
sing the method of nonequilibrium statistical operator by Zubarev, an approach is proposed for the description of kinetics which takes into account the nonlinear hydrodynamic fluctuations for a quantum Bose system. Non-equilibrium statistical operator is
P.A. Hlushak, M.V. Tokarchuk
doaj   +1 more source

Analyzing and forecasting the dynamics of Internet resource user sentiments based on the Fokker–Planck equation

open access: yesРоссийский технологический журнал
Objectives. The study aims to theoretically derive the power law observed in practice for the distribution of characteristics of sociodynamic processes from the stationary Fokker–Planck equation and apply the non-stationary Fokker–Planck equation to ...
J. P. Perova, S. A. Lesko, A. A. Ivanov
doaj   +1 more source

Brownian motion of grains and negative friction in dusty plasmas

open access: yesCondensed Matter Physics, 2004
Within the approximation of dominant charging collisions the explicit microscopic calculations of the Fokker-Planck kinetic coefficients for highly-charged grains moving in plasma are performed.
S.A.Trigger, A.G.Zagorodny
doaj   +1 more source

Numerical Solution of Fokker-Planck-Kolmogorov Time Fractional Differential Equations Using Legendre Wavelet Method Along with convergence and error analysis [PDF]

open access: yesمدل‌سازی پیشرفته ریاضی
The purpose of this paper is to present an efficient numerical method for finding numerical solutions Fokker-Planck-Kolmogorov time-fractional differential equations.The Legendre wavelet approach was employed for this objective. The Legendre wave was the
شعبان محمدی   +1 more
doaj   +1 more source

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