Results 21 to 30 of about 25,373 (175)

Global bifurcations to subcritical magnetorotational dynamo action in Keplerian shear flow [PDF]

open access: yes, 2013
Magnetorotational dynamo action in Keplerian shear flow is a three-dimensional, non-linear magnetohydrodynamic process whose study is relevant to the understanding of accretion processes and magnetic field generation in astrophysics.
Cossu, Carlo   +11 more
core   +1 more source

An evolutionarily young defense metabolite influences the root growth of plants via the ancient TOR signaling pathway

open access: yeseLife, 2017
To optimize fitness a plant should monitor its metabolism to appropriately control growth and defense. Primary metabolism can be measured by the universally conserved TOR (Target of Rapamycin) pathway to balance growth and development with the available ...
Frederikke Gro Malinovsky   +6 more
doaj   +1 more source

A Long‐Lived Planetesimal Dynamo Powered by Core Crystallization

open access: yesGeophysical Research Letters, 2021
The existence of numerous iron meteorite groups indicates that some planetesimals underwent melting that led to metal‐silicate segregation, sometimes producing metallic cores.
Clara Maurel   +6 more
doaj   +1 more source

General Relativistic Magnetohydrodynamics Mean-Field Dynamos

open access: yesFluids, 2022
Large-scale, ordered magnetic fields in several astrophysical sources are supposed to be originated, and maintained against dissipation, by the combined amplifying action of rotation and small-scale turbulence. For instance, in the solar interior, the so-
Luca Del Zanna    +4 more
doaj   +1 more source

Magnetic Signatures of Large-Scale Electric Currents in the Earth’s Environment at Middle and Low Latitudes

open access: yesAtmosphere, 2022
The purpose of space weather is the systemic study of the Sun–Earth system, in order to determine the impact of solar events on the electromagnetic environment of the Earth.
Christine Amory-Mazaudier
doaj   +1 more source

Heartbeat of the sun from principal component analysis and prediction of solar activity on a millenium timescale [PDF]

open access: yes, 2015
We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21-24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling from
Shepherd, Simon J.   +10 more
core   +1 more source

Magnetic field amplification to gigagauss scale via hydrodynamic flows and dynamos driven by femtosecond lasers

open access: yesNew Journal of Physics, 2021
Reaching gigagauss magnetic fields opens new horizons both in atomic and plasma physics. At these magnetic field strengths, the electron cyclotron energy ℏω _c becomes comparable to the atomic binding energy (the Rydberg), and the cyclotron frequency ω ...
K Jiang, A Pukhov, C T Zhou
doaj   +1 more source

Prandtl-number dependence of convection-driven dynamos in rotating spherical fluid shells [PDF]

open access: yes, 2005
The value of the Prandtl number P exerts a strong influence on convection-driven dynamos in rotating spherical shells filled with electrically conducting fluids.
Simitev, R., Busse, F.H.
core   +1 more source

Dynamic Modeling of Indole Glucosinolate Hydrolysis and Its Impact on Auxin Signaling

open access: yesFrontiers in Plant Science, 2018
Plants release chemicals to deter attackers. Arabidopsis thaliana relies on multiple defense compounds, including indol-3-ylmethyl glucosinolate (I3G), which upon hydrolysis initiated by myrosinase enzymes releases a multitude of bioactive compounds ...
Daniel Vik   +4 more
doaj   +1 more source

On energetics and inertial-range scaling laws of two-dimensional magnetohydrodynamic turbulence [PDF]

open access: yes, 2012
L. Blackbourn was supported by an EPSRC post-graduate studentship.We study two-dimensional magnetohydrodynamic turbulence, with an emphasis on its energetics and inertial range scaling laws.
Tran, Chuong Van   +2 more
core   +1 more source

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