Results 81 to 90 of about 2,184,733 (309)

Turbulence-generated proton-scale structures in the terrestrial magnetosheath [PDF]

open access: yes, 2016
Recent results of numerical magnetohydrodynamic simulations suggest that in collisionless space plasmas turbulence can spontaneously generate thin current sheets.
Consolini, Giuseppe   +4 more
core   +3 more sources

IMPALAS: Investigation of MagnetoPause Activity using Longitudinally-Aligned Satellites—a mission concept proposed for the ESA M3 2020/2022 launch [PDF]

open access: yes, 2012
The dayside magnetopause is the primary site of energy transfer from the solar wind into the magnetosphere, and modulates the activity observed within the magnetosphere itself.
Amm, O.   +19 more
core   +3 more sources

Ionic Liquid‐Based Reversible Metal Electrodeposition for Adaptive Radiative Thermoregulation Under Extreme Environments

open access: yesAdvanced Functional Materials, EarlyView.
A wideband tunable electrochromic device with dynamic thermal emissivity control is demonstrated. The system enables adaptive heat regulation via electrochemically modulated silver deposition, achieving efficient cooling and heating states. The flexible design ensures mechanical robustness under bending conditions, making it promising for portable and ...
Jiawei Liang   +10 more
wiley   +1 more source

Analysis of three-spacecraft data using planar reciprocal vectors: methodological framework and spatial gradient estimation [PDF]

open access: yesAnnales Geophysicae, 2009
In the context of ESA's Cluster mission, four-point array techniques are widely used to analyze space plasma phenomena such as shocks and discontinuities, waves and turbulence, and spatial gradients.
J. Vogt, A. Albert, O. Marghitu
doaj   +1 more source

Can Planet Nine Be Detected Gravitationally by a Sub-Relativistic Spacecraft? [PDF]

open access: yes, 2020
Planet 9 was proposed as an explanation for the clustering of orbits for some trans-Neuptunian objects. Recently, the use of a sub-relativistic spacecraft was proposed to indirectly probe Planet 9's gravitational influence. Here we study the effects of the drag and electromagnetic forces exerted on a sub-relativistic spacecraft by the interstellar ...
arxiv   +1 more source

Solar cycle variations of the Cluster spacecraft potential and its use for electron density estimations

open access: yes, 2012
[1] A sunlit conductive spacecraft, immersed in tenuous plasma, will attain a positive potential relative to the ambient plasma. This potential is primarily governed by solar irradiation, which causes escape of photoelectrons from the surface of the ...
B. Lybekk   +7 more
semanticscholar   +1 more source

Electric Field Driven Soft Morphing Matter

open access: yesAdvanced Materials, EarlyView.
This study presents soft morphing matter robots that exhibit extremely high morphological adaptability and complex multimodal electric field response. They can undergo large, controlled body deformation and show complex locomotion on different terrains under the manipulation of external electric fields, making a significant step beyond current ...
Ciqun Xu   +3 more
wiley   +1 more source

Temporal and spatial evolution of discrete auroral arcs as seen by Cluster [PDF]

open access: yesAnnales Geophysicae, 2005
Two event studies are presented in this paper where intense convergent electric fields, with mapped intensities up to 1350 mV/m, are measured in the auroral upward current region by the Cluster spacecraft, at altitudes between 3 and 5 Earth radii ...
S. Figueiredo   +9 more
doaj   +1 more source

On the Conditions of Aliasing Effects in Constellations with More than Four Spacecraft [PDF]

open access: yesarXiv, 2020
The k-filtering/wave telescope method has been successfully applied to the four-spacecraft measurements from Cluster II and MMS, revealing the four-dimensional power spectral density $\textrm{PSD}(\omega, \mathbf k)$. As the number of spacecraft within a constellation increases, the geometry becomes more complicated, and it is harder to find the first ...
arxiv  

Star scanner [PDF]

open access: yes, 1974
A star scanner on a spin stabilized spacecraft is described which includes a reticle with a pair of slits having different separations as a function of the spacecraft vertical plane, to form a V slit.
Gutshall, R. L.   +2 more
core   +1 more source

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