Results 41 to 50 of about 166,601 (310)

On the Effects of Bremsstrahlung Radiation During Energetic Electron Precipitation [PDF]

Geophysical Research Letters, 2018
AbstractPrecipitation of energetic particles into the Earth's atmosphere can significantly change the properties, dynamics, as well as the chemical composition of the upper and middle atmosphere. In this paper, using Monte Carlo models, we simulate, from first principles, the interaction of monoenergetic beams of precipitating electrons with the ...
Wei Xu, Robert A. Marshall, Xiaohua Fang, Esa Turunen, Antti Kero   +4 more
openaire   +2 more sources

Origin of energetic electron precipitation >30 keV into the atmosphere [PDF]

, 2010
Energetic electrons are deposited into the atmosphere from Earth's inner magnetosphere, resulting in the production of odd nitrogen (NOx). During polar night, NOx can be transported to low altitudes, where it can destroy ozone, affecting the atmospheric ...
Lam, Mai Mai, Moffat-Griffin, Tracy, Green, Janet C., Glauert, Sarah A., Horne, Richard B., Meredith, Nigel P.   +5 more
core   +1 more source

D- and E-region effects in the auroral zone during a moderately active 24-h period in July 2005 [PDF]

, 2007
International audienceThe effects of energetic electron precipitation into the auroral region at a time of enhanced solar wind have been investigated during a continuous period of 24 h, using the European Incoherent Scatter (EISCAT) radar, an imaging ...
Birch, M. J., B. J. I. Bromage, Bromage, B. J. I., Hargreaves, J. K., J. K. Hargreaves, M. J. Birch, Birch, Martin John   +6 more
core   +1 more source

Minority carrier lifetime in silicon photovoltaics : the effect of oxygen precipitation [PDF]

, 2014
Single-crystal Czochralski silicon used for photovoltaics is typically supersaturated with interstitial oxygen at temperatures just below the melting point.
McGuire, R. E., Falster, RJ, Falster, Robert J., Murphy, J. D.; id_orcid, Bothe, K, Falster, R.J., Murphy, John D., J.D. Murphy, Bothe, K., K. Bothe, McGuire, RE, R.J. Falster, Bothe, Karsten, McGuire, R.E., R.E. McGuire, Murphy, JD, Murphy, John, Murphy, J.D., Voronkov, V. V., Voronkov, VV, Falster, R. J., Voronkov, V.V., V.V. Voronkov   +22 more
core   +1 more source

Effects of energetic electrons on the electrodynamics in the ionosphere [PDF]

, 2004
International audienceFrom the observations by the PIXIE and UVI cameras on board the Polar satellite, we derive global maps of the precipitating electron energy spectra from less than 1keV to 100keV.
Rosenberg, T. J., D. L. Detrick, Aksnes, A., Detrick, D.L., Rosenberg, T.J., A. Aksnes, J. Stadsnes, N. Østgaard, G. A. Germany, Østgaard, N., T. J. Rosenberg, Lu, G., Schulz, M, M. Schulz, Detrick, D. L., Stadsnes, J., Germany, G. A., R. R. Vondrak, Vondrak, R.R., Vondrak, R. R., Germany, G.A., G. Lu   +21 more
core   +1 more source

Energetic electron precipitation into the atmosphere

, 2020
This chapter provides an overview of the impact of energetic electron precipitation from the aurora and the radiation belts on the composition, radiative balance, and dynamics of the Earth's atmosphere, from the lower thermosphere down to the surface. The primary processes related to atmospheric ionization and subsequent collision reactions that lead ...
Sinnhuber, Miriam, Funke, Bernd
openaire   +3 more sources

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

High-latitude geomagnetically induced current events observed on very low frequency radio wave receiver systems [PDF]

, 2010
Noise burst events observed at Sodankylä, Finland, in the frequency range 20–25 kHz during January–April 2005 last up to 4 s, occur more often at midnight, are associated with high geomagnetic activity, and exhibit a quasi-constant amplitude perturbation
Dietrich, Sarah, Raita, Tero, Clarke, Ellen, Thomson, Alan W.P., Rodger, Craig J., Clilverd, Mark A., Ulich, Thomas, Kavanagh, Andrew J.   +7 more
core   +1 more source

Space weather effects over SAMA during the extreme geomagnetic storm on May 10-11, 2024: disturbances of the neutral and ionized atmosphere

Frontiers in Astronomy and Space Sciences
A complex active region in the Sun’s photosphere from 8 May 2024, produced seven halo-type Coronal Mass Ejections (CMEs) following extreme solar flares. These events generated Solar Energetic Particles (SEPs) that propagated toward Earth, culminating in ...
Ligia Alves Da Silva, Ligia Alves Da Silva, Jiankui Shi, Lívia R. Alves, Laysa Cristina Araújo Resende, Laysa Cristina Araújo Resende, Luis Eduardo Antunes Vieira, Joaquim Eduardo Rezende Costa, Jose Paulo Marchezi, Oleksiy V. Agapitov, David Gary Sibeck, Angela Machado dos Santos, Angela Machado dos Santos, Vania Fatima Andrioli, Vania Fatima Andrioli, Paulo Ricardo Jauer, Paulo Ricardo Jauer, Vinicius Deggeroni, Carolina de Sousa do Carmo, Carolina de Sousa do Carmo, Prosper Kwamla Nyassor, Sony Su Chen, Toyese Tunde Ayorinde, Karen Júlia Coldebella Ferreira, Juliano Moro, Juliano Moro, Chi Wang, Hui Li, Zhengkuan Liu   +28 more
doaj   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source