Results 131 to 140 of about 458,052 (359)
Galaxies, 2017 We study the spin current tensor of a Dirac particle at accelerations close to the upper limit introduced by Caianiello. Continual interchange between particle spin and angular momentum is possible only when the acceleration is time-dependent.
Giorgio Papini
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Extrapolation Boundary Conditions for 2‐D Smoothed Particle Hydrodynamics
International Journal for Numerical Methods in Fluids, EarlyView.This paper introduces novel inflow, outflow, and wall boundaries for the WCSPH method. Utilising innovative concepts from finite volume methods, fluid properties of sequential dynamic particles with varying distances to boundaries are extrapolated to ghost and wall particles using first‐order Taylor series expansion.
Hossein Mahdizadeh +3 more
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Antropologìčnì Vimìri Fìlosofsʹkih Doslìdžen', 2012 The article analyzes the paradigmatic shift in contemporary basic science. Analyzed the worldview of the last discoveries in fundamenta lphysics and astrophysics.Статья посвящена анализу парадигмальных сдвигов в современной фундаментальной науке ...
T. V. Gorbatiuk
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Differential geometry of collective models
AIMS Mathematics, 2019 The classical astrophysical theory of Riemann ellipsoids and the quantum nuclear theory of Bohr and Mottelson share a common mathematical foundation in terms of the differential geometry of a principal bundle ${\cal P}$ and its associated vector bundle E,
George Rosensteel
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Linear Discontinuity Sharpening for Highly Resolved and Robust Magnetohydrodynamics Simulations
International Journal for Numerical Methods in Fluids, EarlyView.This study applies a reconstruction scheme, “hybrid MUSCL–THINC” for finite volume methods developed by Chiu et al., to magnetohydrodynamics (MHD) simulations. Furthermore, the robustness is improved by a modification that deactivates an artificial compression by THINC depending on the non‐linearity of MHD discontinuities.
Tomohiro Mamashita +2 more
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The coming of age of cosmophysics
Anais da Academia Brasileira de Ciências, 2003 ''Cosmophysics'' as reviewed is a multidisciplinary domain which brings together astroparticle physics, fundamental physics in space and topics related to the structure and evolution of the Universe.
Maurice Jacob
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On the fundamental additive modes of ocean color absorption
Limnology and Oceanography, EarlyView.Abstract Previous principal component analyses of ocean color absorption coefficient spectra aλ$$ a\left(\lambda \right) $$ have shown the variation in these data is captured by a few eigenfunctions. Here, we perform an unsupervised, non‐negative matrix factorization (NMF) of aλ$$ a\left(\lambda \right) $$ to derive their fundamental and physically ...
J. Xavier Prochaska, Patrick Gray
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Calculating the ionization rate induced by GCR and SCR protons in Earth’s atmosphere
Solar-Terrestrial Physics, 2019 This paper explores the applied use of the RUSCOSMICS software package [http://ruscosmics.ru] designed to simulate propagation of primary cosmic ray (CR) particles through Earth’s atmosphere and collect information about characteristics of their ...
Maurchev E.A. +4 more
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Materials Genome Engineering Advances, EarlyView.In conventional theories, electron‐phonon relaxation time τe‐p ${\tau }_{e\mbox{-}p}$—the average interval between two consecutive electron‐phonon collisions—is assumed to be independent of electron density. In this study, we establish a new relationship of τe−p=C∗·T−1·n−1/3 ${\tau }_{e-p}={C}^{\ast }\mathit{\cdot }{T}^{-1}\mathit{\cdot }{n}^{-1/3 ...
Ziru Wang +6 more
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