Results 51 to 60 of about 29,366 (214)
Reconnecting Eye to Brain [PDF]
The Journal of Neuroscience, 2016 Although much is known about the regenerative capacity of retinal ganglion cells, very significant barriers remain in our ability to restore visual function following traumatic injury or disease-induced degeneration. Here we summarize our current understanding of the factors regulating axon guidance and target engagement in regenerating axons, and ...
Michael C. Crair, Carol A. Mason
openaire +2 more sources
Unsteady Dungey cycle from the point of view of Stokes’ theorem
Frontiers in Astronomy and Space SciencesThe Dungey cycle is considered from the formation of a magnetic barrier and necessary for dayside reconnection conditions till the electric field generation around the Birkeland current loop and magnetic flux circulation balance.
Vladimir S. Semenov +6 more
doaj +1 more source
Reconnection Rate and Transition from Ion-coupled to Electron-only Reconnection
The Astrophysical Journal, 2023 Standard collisionless magnetic reconnection couples with both electron and ion dynamics. Recently, a new type of magnetic reconnection, electron-only magnetic reconnection without ion outflow, has been observed, and its reconnection rate has been found ...
Yundan Guan +4 more
doaj +1 more source
Relationship Between Geomagnetic Storms and Auroral/Magnetospheric Substorms: Early Studies
Frontiers in Astronomy and Space Sciences, 2020 This paper describes a short story of how I learned in early days in space physics (1960–1970) that there are the direct and feed-back relationships between geomagnetic storms and auroral/magnetospheric substorms.
Syun-Ichi Akasofu
doaj +1 more source
Perspectives on magnetic reconnection [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2016 Magnetic reconnection is a topological rearrangement of magnetic field that occurs on time scales much faster than the global magnetic diffusion time. Since the field lines break on microscopic scales but energy is stored and the field is driven on macroscopic scales, reconnection is an inherently multi-scale process that often involves both ...
Ellen G. Zweibel, Masaaki Yamada
openaire +2 more sources
Model of Hall Reconnection [PDF]
Physical Review Letters, 2008 The rate of quasi-stationary, two-dimensional magnetic reconnection is calculated in the framework of incompressible Hall magnetohydrodynamics (MHD). The calculation is based on the solution of Hall-MHD equations that include Hall and electron pressure terms for electric current.
openaire +3 more sources
Three‐Dimensional Hybrid Simulation of Viscous‐Like Processes at Saturn's Magnetopause Boundary
Geophysical Research Letters, 2018 Saturn's magnetosheath flows exhibit significant dawn/dusk asymmetry. The dawnside flows are reduced from expectation, suggesting significant momentum transport through the magnetopause boundary where the flow shear is maximized.
P. A. Delamere, B. Burkholder, X. Ma
doaj +1 more source
Evolution of a long-duration transpolar arc during very quiet period
Frontiers in Astronomy and Space SciencesIn this study, we explore the evolution of long-duration transpolar arcs observed during an exceptionally quiet period by the Fengyun-3D and Defense Meteorological Satellite Program satellites on 17 January 2019. Leveraging the extensive field of view of
Fei He +9 more
doaj +1 more source
The effects of turbulence on three‐dimensional magnetic reconnection at the magnetopause
Geophysical Research Letters, 2016 Two‐ and three‐dimensional particle‐in‐cell simulations of a recent encounter of the Magnetospheric Multiscale Mission (MMS) with an electron diffusion region at the magnetopause are presented.
L. Price +5 more
doaj +1 more source
Electron scale structures and magnetic reconnection signatures in the turbulent magnetosheath
Geophysical Research Letters, 2016 Collisionless space plasma turbulence can generate reconnecting thin current sheets as suggested by recent results of numerical magnetohydrodynamic simulations.
E. Yordanova +29 more
doaj +1 more source