Results 81 to 90 of about 129,844 (334)

Can We Intercalibrate Satellite Measurements by Means of Data Assimilation? An Attempt on LEO Satellites

Space Weather
Low Earth Orbit satellites offer extensive data of the radiation belt region, but utilizing these observations is challenging due to potential contamination and difficulty of intercalibration with spacecraft measurements at Highly Elliptic Orbit that can
Angélica M. Castillo, Yuri Y. Shprits, Nikita A. Aseev, Artem Smirnov, Alexander Drozdov, Sebastian Cervantes, Ingo Michaelis, Marina García Peñaranda, Dedong Wang   +8 more
doaj   +1 more source

Propagation and Dispersion of Lightning-Generated Whistlers Measured From the Van Allen Probes

Frontiers in Physics, 2021
We study the propagation and attenuation of lightning-generated whistler (LGW) waves in near-Earth space (L ≤ 3) through the statistical study of three specific quantities extracted from data recorded by NASA’s Van Allen Probes mission, from 2012 to 2019:
J.-F. Ripoll, J.-F. Ripoll, T. Farges, D. M. Malaspina, D. M. Malaspina, G. S. Cunningham, G. B. Hospodarsky, C. A. Kletzing, J. R. Wygant   +8 more
doaj   +1 more source

Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time [PDF]

, 2015
Although most studies of the effects of EMIC waves on Earth's outer radiation belt have focused on events in the afternoon sector in the outer plasmasphere or plume region, strong magnetospheric compressions provide an additional stimulus for EMIC wave ...
Baker, D. N., Engebretson, M. J., Gkioulidou, M., Horne, R. B., Huang, C.-L., Kletzing, C. A., Lessard, M. R., Mann, I. R., Oksavik, K., Omura, Y., Posch, J. L., Raita, T ., Reeves, G. D., Shiokawa, K., Singer, H. J., Smith, C. W., Spence, H. E., Wygant, J. R.   +17 more
core   +1 more source

Low‐harmonic magnetosonic waves observed by the Van Allen Probes [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractPurely compressional electromagnetic waves (fast magnetosonic waves), generated at multiple harmonics of the local proton gyrofrequency, have been observed by various types of satellite instruments (fluxgate and search coil magnetometers and electric field sensors), but most recent studies have used data from search coil sensors, and many have ...
J. L Posch, M. J. Engebretson, C. N. Olson, S. A. Thaller, A. W. Breneman, J. R. Wygant, S. A. Boardsen, C. A. Kletzing, C. W. Smith, G. D. Reeves   +9 more
openaire   +1 more source

Liquid biopsy epigenetics: establishing a molecular profile based on cell‐free DNA

Molecular Oncology, EarlyView.
Cell‐free DNA (cfDNA) fragments in plasma from cancer patients carry epigenetic signatures reflecting their cells of origin. These epigenetic features include DNA methylation, nucleosome modifications, and variations in fragmentation. This review describes the biological properties of each feature and explores optimal strategies for harnessing cfDNA ...
Christoffer Trier Maansson, Anders Lade Nielsen, Boe Sandahl Sorensen   +2 more
wiley   +1 more source

MHD‐Test Particles Simulations of Moderate CME and CIR‐Driven Geomagnetic Storms at Solar Minimum

Space Weather, 2021
As part of the Whole Heliosphere and Planetary Interactions initiative, contrasting drivers of radiation belt electron response at solar minimum have been investigated with MHD‐test particle simulations for the May 13–14, 2019 Coronal Mass Ejection (CME)‐
Mary K. Hudson, Scot R. Elkington, Zhao Li, Maulik Patel, Kevin Pham, Kareem Sorathia, Alex Boyd, Allison Jaynes, Alexis Leali   +8 more
doaj   +1 more source

A machine-learning-based electron density (MLED) model in the inner magnetosphere

Earth and Planetary Physics, 2022
Plasma density is an important factor in determining wave-particle interactions in the magnetosphere. We develop a machine-learning-based electron density (MLED) model in the inner magnetosphere using electron density data from Van Allen Probes between ...
QingHua Zhou, YunXiang Chen, FuLiang Xiao, Sai Zhang, Si Liu, Chang Yang, YiHua He, ZhongLei Gao   +7 more
doaj   +1 more source

Shock-induced prompt relativistic electron acceleration in the inner magnetosphere [PDF]

, 2015
We present twin Van Allen Probes spacecraft observations of the effects of a solar wind shock impacting the magnetosphere on 8 October 2013. The event provides details both of the accelerating electric fields associated with the shock and the response of
Baker, D. N., Boyd, A. J., Erickson, P. J., Foster, J. C., Hudson, M. K., Spence, Harlan E., Wygant, J. R.   +6 more
core   +3 more sources

Semiannual Variation in radiation belts particle fluxes: Van Allen probes observations [PDF]

, 2018
Abstract. The Semiannual Variation (SAV) is an annual pattern characterized by maxima around the equinoxes and minima near solstices observed in many space weather parameters. Several authors have studied this variation in the electron fluxes of the magnetosphere, focusing only in a few energy levels.
Facundo L. Poblet, Francisco Azpilicueta
openaire   +3 more sources

Class IIa HDACs forced degradation allows resensitization of oxaliplatin‐resistant FBXW7‐mutated colorectal cancer

Molecular Oncology, EarlyView.
HDAC4 is degraded by the E3 ligase FBXW7. In colorectal cancer, FBXW7 mutations prevent HDAC4 degradation, leading to oxaliplatin resistance. Forced degradation of HDAC4 using a PROTAC compound restores drug sensitivity by resetting the super‐enhancer landscape, reprogramming the epigenetic state of FBXW7‐mutated cells to resemble oxaliplatin ...
Vanessa Tolotto, Nicolò Gualandi, Ylenia Cortolezzis, Raffaella Picco, Monica Colitti, Francesca D'Este, Mariachiara Gani, Wayne W. Hancock, Giovanni Terrosu, Cristina Degrassi, Francesca Agostini, Claudio Brancolini, Luigi E. Xodo, Eros Di Giorgio   +13 more
wiley   +1 more source