Results 91 to 100 of about 5,511 (281)

Spacecraft Flight in the Atmosphere [PDF]

, 2014
Spacecraft that orbit in Low Earth Orbit travel through a tenuous atmosphere and hence experience aerodynamic forces that can become quite significant, specially at low altitudes. The presence of these forces can become a major design driver for missions
Virgili Llop, Josep
core  

Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause [PDF]

, 2012
The Kelvin-Helmholtz Instability (KHI) can drive waves at the magnetopause. These waves can grow to form rolled-up vortices and facilitate transfer of plasma into the magnetosphere.
C. P. Escoubet, Pu ZY, Borg, A. L., Soucek, J., Y. V. Bogdanova, Bogdanova YV, J. P. Eastwood, Sibeck DG, Shen C, Wang, J., Panov EV, Wang J, M. G. G. T. Taylor, Borg AL, Fazakerley, A. N., J. Berchem, Bogdanova, Y. V., Shen, C., M. W. Dunlop, Lavraud, B., Dunlop, M. W., Phan, T., A. L. Borg, Volwerk, M., H. Laakso, Berchem, J., Wild JA, J. K. Shi, Constantinescu OD, Eastwood JP, J. A. Wild, A. N. Fazakerley, Laakso H, T. Phan, C. Shen, Lavraud B, Taylor, M. G. G. T., Frey, H. U., Sibeck, D. G., Z. Y. Pu, Berchem J, Taylor MGGT, Shi JK, Laakso, H., H. U. Frey, Hasegawa, H., Soucek J, Panov, E. V., Pu, Z. Y., E. V. Panov, Frey HU, Masson, A., Hasegawa H, Phan T, J. Soucek, D. G. Sibeck, Escoubet CP, Dunlop MW, J. Wang, M. Volwerk, Masson A, H. Hasegawa, A. Masson, Wild, J. A., Constantinescu, O. D., O. D. Constantinescu, Volwerk M, Eastwood, J. P., Shi, J. K., Escoubet, C. P., Fazakerley AN, B. Lavraud   +71 more
core   +1 more source

Coupling Anodic Activity and Stability at Ni‐Based Non‐Oxide Catalysts via Coordinating Alcohol Oxidation and Oxygen Evolution

Advanced Functional Materials, EarlyView.
A cooperative and competitive interrelationship between alcohol oxidation (AOR) and water oxidation (OER) was observed on a typical anode catalyst of Ni2P. In situ Raman spectroscopy and electrochemical analyses revealed a specific complementary mechanism between them, in which OER and AOR critically contribute to the activity and stability of anodic ...
Yong Yan, Xinyu Liu, Yuguo Zhao, Hanwen Jian, Huan Zhou, Riyi Zhang, Dong Wang, Peter Schaaf, Lihua Wang, Guangsheng Guo, Xiayan Wang   +10 more
wiley   +1 more source

A coordinated ground-based and IMAGE satellite study of quiet-time plasmaspheric density profiles [PDF]

, 2003
Cold plasma mass density profiles in the plasmasphere have been determined for the geomagnetically quiet day of 19th August 2000 using the cross-phase technique applied to ground-based magnetometer data from the SAMNET, IMAGE and BGS magnetometer arrays.
Ozeke, L.G., Dent, Zoë C., Menk, F.W., Mann, I.R., Goldstein, J., Clilverd, M.A., Wilford, C.R., Dent, Zoë C   +7 more
core   +1 more source

Weakened Magnetic Braking in the Exoplanet Host Star 51 Peg

The Astrophysical Journal Letters
The consistently low activity level of the old solar analog 51 Peg not only facilitated the discovery of the first hot Jupiter, but also led to the suggestion that the star could be experiencing a magnetic grand minimum.
Travis S. Metcalfe, Klaus G. Strassmeier, Ilya V. Ilyin, Derek Buzasi, Oleg Kochukhov, Thomas R. Ayres, Sarbani Basu, Ashley Chontos, Adam J. Finley, Victor See, Keivan G. Stassun, Jennifer L. van Saders, Aldo G. Sepulveda, George R. Ricker   +13 more
doaj   +1 more source

Giant Magnetic Coercivity Driven by Spin‐Bag Ferromagnetism in Epitaxial Sr3YCo4O10+δ Films with Engineered 2D Oxygen Vacancy Ordering

Advanced Functional Materials, EarlyView.
A giant magnetic coercivity and a vertical shift of hysteresis loops are demonstrated in Sr3YCo4O10+δ epitaxial films. The hard magnetic behavior originates from ferromagnetic spin bags stabilized within a long‐range ordered oxygen‐vacancy structure.
Yanbin Chen, Roger Guzman, Xiaomin Jia, Jialu Wu, Xing Xu, Li Sun, Jinbo Pan, Shixuan Du, Myung‐Hwan Whangbo, Wu Zhou, Jing Ma, Ce‐wen Nan, Chonglin Chen   +12 more
wiley   +1 more source

General Synthesis of Amorphous Pd‐Based Nanoparticles Towards Highly Efficient Nitrate‐to‐Ammonia Electrocatalysis

Advanced Functional Materials, EarlyView.
A family of amorphous palladium‐based multi‐component phosphides nanoparticles, synthesized via a robust one‐step wet‐chemical method, overcoming the immiscibility of different elements and the difficulty in forming a stable, disordered structure. When applied in the electrochemical nitrate reduction reaction, these nanocatalysts effectively suppress ...
Lei Xu, Chuhao Luan, Mingzi Sun, Weiwei Chen, Xiaozhi Liu, Chen Ma, Long Zheng, Gang Wang, Peng Han, Ping Gu, Xiao Wang, Chenhao Shu, Cheng Lyu, Zhenyu Zhang, Nailiang Yang, Hongyan He, Xiaohong Li, Dong Su, Bolong Huang, Wenjun Zhang, Ye Chen   +20 more
wiley   +1 more source

Cenozoic Plate Tectonic Reconstructions and Plate Boundary Processes in the Southwest Pacific [PDF]

, 2005
The Australia-Pacific-Antarctic plate circuit has long been a weak link in global plate reconstruction models for Cenozoic time. The time period spanning chron 20 to chron 7 (43-25 Ma) is particularly problematic for global plate models because seafloor
Keller, William R.
core   +1 more source

Magnetic Fields in a Sample of Planet-hosting M Dwarf Stars from Kepler, K2, and TESS Observed by APOGEE

The Astrophysical Journal
Stellar magnetic fields have a major impact on space weather around exoplanets orbiting low-mass stars. From an analysis of Zeeman-broadened Fe i lines measured in near-infrared SDSS/APOGEE spectra, mean magnetic fields are determined for a sample of 29 ...
Fábio Wanderley, Katia Cunha, Verne V. Smith, Oleg Kochukhov, Diogo Souto, C. Allende Prieto, Suvrath Mahadevan, Steven R. Majewski, Philip S. Muirhead, Marc Pinsonneault, Ryan Terrien   +10 more
doaj   +1 more source

Simulation of Vector Magnetic Field In-orbit Calibration Algorithm for Geomagnetic Survey Satellite

Chinese Journal of Space Science, 2022
Wen DU, He HUANG, Jun ZHOU
openaire   +1 more source