Results 71 to 80 of about 30,979 (263)

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

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

Annales 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, G. T. Marklund, T. Karlsson, T. Johansson, Y. Ebihara, M. Ejiri, N. Ivchenko, P.-A. Lindqvist, H. Nilsson, A. Fazakerley   +9 more
doaj   +1 more source

All‐In‐One Thermal Protection: Multifunctional Synergy in Hierarchically Structured Dual‐Oxide Nanofiber Aerogel

Advanced Science, EarlyView.
Through a cross‐scale structural design, a lightweight, heat‐resistant, and thermal‐insulating streamlined dual‐oxide nanofiber aerogel is prepared to achieve exceptional thermomechanical stability. Structural design of ceramic fibrous aerogel toward thermal protection, illustrating thermal insulation and stress dissipation.
Zijian Zhao, Shujing Li, Han Ma, Zhou Zhou, Wentao Zhao, Zichen Wei, Yanbin Li, Qingguo Fei, Yueming Sun, Yunqian Dai   +9 more
wiley   +1 more source

South-north asymmetry of field-aligned currents in the magnetotail observed by Cluster [PDF]

, 2010
We statistically investigated features of the field-aligned current (FAC) distribution in plasma sheet boundary layers between 17 and 19 RE in the magnetotail using the curlometer technique to calculate the current from four-point magnetic field ...
Cheng, Z. W., Dandouras, I., Dunlop, M., Fazakerley, A., Grocott, A., Kistler, L. M., Lahiff, A. D., Lester, M., Liu, Z. X., Lucek, E., Lui, A. T. Y., Mouikis, C., Pu, Z. Y., Rème, H., Shen, C., Shi, J. K., Taylor, M. G. G. T., Torkar, K., Volwerk, M., Walsh, A. P., Zhang, T. L.   +20 more
core   +1 more source

In Situ X‐Ray Tomography and Acoustic Emission Monitoring of Damage Evolution in C/C‐SiC Composites Fabricated by Liquid Silicon Infiltration

Advanced Science, EarlyView.
This study investigates how the internal structure of fiber‐reinforced ceramic composites affects their resistance to damage. By combining 3D X‐ray imaging with acoustic emission monitoring during mechanical testing, it reveals how silicon distribution influences crack formation.
Yang Chen, Renato S. M. Almeida, Stefan Flauder, Guillaume Couégnat, Kamen Tushtev, Jürgen Horvath, Peter Wriggers, Kurosch Rezwan   +7 more
wiley   +1 more source

Locations of Auroral Kilometric Radiation Bursts Inferred From Multi-Spacecraft Wideband Cluster VLBI Observations i: Description of Technique and Initial Results

, 2003
The Cluster Wideband Data instrument has been used to determine the locations of auroral kilometric radiation (AKR) using very long baseline interferometry.
Alexander, Alexander, Alexander, Barton, Burns, Ergun, Feldstein, Frank, Gaelzer, Gaelzer, Gallagher, Gallagher, Gurnett, Gurnett, Huff, Kaiser, Kaiser, Kurth, Louarn, R. L. Mutel, Schreiber, Wu   +21 more
core   +1 more source

Pattern transition in spacecraft formation flying using bifurcating potential field [PDF]

, 2012
Many new and exciting space mission concepts have developed around spacecraft formation flying, allowing for autonomous distributed systems that can be robust, scalable and flexible.
Bennet, Derek James, McInnes, Colin
core   +1 more source

First Cluster results of the magnetic field structure of the mid- and high-altitude cusps [PDF]

Annales Geophysicae, 2001
Magnetic field measurements from the four Cluster spacecraft from the mid- and high-altitude cusp are presented. Cluster underwent two encounters with the mid-altitude cusp during its commissioning phase (24 August 2000). Evidence for field-aligned
P. J. Cargill, M. W. Dunlop, A. Balogh, the FGM team   +3 more
doaj   +1 more source

Application Status and Prospect of Digital Twin for On-Orbit Spacecraft

IEEE Access, 2021
With cloud computing, big data, artificial intelligence and other new information technologies going into space, the era of space intelligence is coming. The spacecraft is facing more frequent and multi-task tests in an unprecedented complex environment,
Wenqiang Yang, Yu Zheng, Shaoyang Li
doaj   +1 more source

Piezo‐Phototronic PVDF/HfO2/Nano‐Cu Heterostructured Thin Film for Flexible Self‐Powered Multimodal Sensing

Advanced Science, EarlyView.
Electrospinning a composite of PVDF, HfO2, and nano‐Cu transforms the discrete precursors into a continuous nanofiber mesh, forming a multi‐interface heterostructure with embedded nanoparticles. The presence of HfO2 and nano‐Cu at the fiber interfaces induces a highly aligned β‐phase, which enhances piezoelectric crystallinity and improves the material'
Jiawei Gu, Qiongle Peng, Xuanqi Zhong, Yi Zheng, Zhiqiang Ma, Xiaoxian Song, Ruihuan Zhang, Bao Liu, Yanhu Zhang, Zhengbao Yang   +9 more
wiley   +1 more source