Results 91 to 100 of about 1,100 (241)

Whistler Chorus Amplification in the Magnetosphere: The Nonlinear Free‐Electron Laser Model and the Ginzburg‐Landau Equation

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We present a novel nonlinear model for whistler‐mode chorus amplification based on the free‐electron laser (FEL) mechanism. First, we derive the nonlinear collective variable equations for the whistler‐electron interaction. Consistent with in situ satellite observations, these equations predict that a small seed wave can undergo exponential ...
Brandon Bonham, Amitava Bhattacharjee
wiley   +1 more source

Resonant Scattering of Radiation Belt Electrons by Off‐Equatorial Magnetosonic Waves

Geophysical Research Letters, 2018
Fast magnetosonic (MS) waves are commonly regarded as electromagnetic waves that are characteristically confined within ±3° of the geomagnetic equator. We report two typical off‐equatorial MS events observed by Van Allen Probes, that is, the 8 May 2014 ...
Binbin Ni, Zhengyang Zou, Song Fu, Xing Cao, Xudong Gu, Zheng Xiang   +5 more
doaj   +1 more source

Imperial systems and local landscapes of Buldan Yayla in Western Anatolia (Türkiye) during the last 4000 years: An integrated palynological, historical, and archaeological approach

Journal of Quaternary Science, Volume 40, Issue 7, Page 1285-1304, October 2025.
ABSTRACT This study investigates long‐term impacts of empires on local socio‐ecosystems in western Anatolia (modern western Türkiye) over the past four millennia. We focus on Buldan Yayla Lake, located in a small mountain basin north of the Büyük Menderes (Great Meander) River valley.
Sabina Fiołna, Mustafa Doğan, Warren Eastwood, John Haldon, Georgios C. Liakopoulos, Dilek Şenkul, Çetin Şenkul, Adam Izdebski   +7 more
wiley   +1 more source

Explaining the dynamics of the sub-relativistic electron third belt in the Earth’s radiation belts by using medium Earth orbit satellite observations

Earth and Planetary Physics
The Earth’s electron radiation belts typically exhibit a two-belt structure. However, observations from the Van Allen Probes revealed the existence of a three-belt structure.
JiaLi Chen, Hong Zou, YuGuang Ye
doaj   +1 more source

Mixing regimes in tropical high‐mountain Andean lakes

Limnology and Oceanography, Volume 70, Issue 10, Page 2872-2892, October 2025.
Abstract Lowland tropical lakes deeper than 15 m are typically warm monomictic, but whether the regime may switch to polymixis at high elevations remains uncertain. Using a year‐long high‐frequency dataset from thermistor chains from 10 deep lakes and occasional temperature profiles from 202 lakes in Ecuador's Cajas Massif, this study examines the ...
Pablo V. Mosquera, Meritxell Batalla, Henrietta Hampel, Raúl F. Vázquez, Jordi Catalan   +4 more
wiley   +1 more source

Margins to account for cardiac and respiratory motion in cardiac radioablation

Medical Physics, Volume 52, Issue 10, October 2025.
Abstract Background Cardiac radioablation (CR) is an emerging treatment for ventricular tachycardia, a rapid abnormal heart rhythm. Effectively delivering radiation to CR targets requires understanding and accounting for geometric uncertainties. One important uncertainty is motion induced by the cardiac and respiratory cycles, which can be accounted ...
Jakob Marshall, Justin Poon, Alanah Bergman, Tania Karan, Marc W. Deyell, Devin Schellenberg, Richard B. Thompson, Steven Thomas   +7 more
wiley   +1 more source

Statistical properties of plasmaspheric hiss derived from Van Allen Probes data and their effects on radiation belt electron dynamics [PDF]

, 2015
Wen Li, Qianli Ma, R. M. Thorne, Jacob Bortnik, C. Kletzing, W. S. Kŭrth, G. B. Hospodarsky, Y. Nishimura   +7 more
openalex   +1 more source

Correlation Between Radiation Enhancements at Aviation Altitudes and Energetic Precipitating Electrons

Space Weather, Volume 23, Issue 10, October 2025.
Abstract The campaign of Automated Radiation Measurements for Aerospace Safety (ARMAS) has revealed that relativistic electron precipitation (REP) from the radiation belts can significantly enhance the radiation environment at aviation altitudes, in addition to the well‐known sources of galactic cosmic rays and solar energetic particles. Recent studies
Wei Xu, Haotian Xu, Xudong Gu, Binbin Ni, Jingyuan Feng, Joshua Pettit, Hilde Nesse, W. Kent Tobiska, Wen Cheng, Wenchen Ma, Yudi Pan, Jacob Bortnik   +11 more
wiley   +1 more source

The Van Allen Radiation Belts: How their discovery worried lay scientists hungry for human spaceflight.

, 2022
Andrew Porwitzky
openalex   +2 more sources

Influence of Mine Dewatering‐Effluent Cycling on Arsenic Loading in a Gold Mine Tailings Containment Area

Water Resources Research, Volume 61, Issue 10, October 2025.
Abstract The Giant Mine (1948–1999) generated 16 Mt of Au‐bearing mill tailings (2800 mg kg−1) originating from a mixture of flotation tailings (84.8 wt%), calcine residues (14.4 wt.%), and arsenic trioxide roaster waste (0.8 wt.%). A water treatment system for high As mine dewatering effluent has operated since the end of mine operations, with the ...
David M. Hilger, David W. Blowes, Andrea E. Brookfield, Jeff G. Bain, Carol J. Ptacek   +4 more
wiley   +1 more source