Results 31 to 40 of about 18,154 (212)

Energy Deposition into the Ionosphere during a Solar Flare with Extreme-ultraviolet Late Phase

The Astrophysical Journal Letters
Solar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap for ...
Jing Liu, Liying Qian, Wenbin Wang, Kevin Pham, Xiangliang Kong, Yao Chen, Wenlong Liu, Libo Liu, Xuanqing Liu   +8 more
doaj   +1 more source

Energy spectra of ions from impulsive solar flares

The Astrophysical Journal, 1992
A study of the energy spectra of ions from impulsive solar flares in the 0.1-100 MeV region is reported. Most of the events studied are dominated by He and these He spectra show a persistent steepening or break above about 10 MeV resulting in an increase in the power-law spectral indices from about 2 to about 3.5 or more.
D. V. Reames, I. G. Richardson, K.-P. Wenzel   +2 more
openaire   +1 more source

Why Autonomous Vehicles Are Not Ready Yet: A Multi‐Disciplinary Review of Problems, Attempted Solutions, and Future Directions

Journal of Field Robotics, EarlyView.
ABSTRACT Personal autonomous vehicles can sense their surrounding environment, plan their route, and drive with little or no involvement of human drivers. Despite the latest technological advancements and the hopeful announcements made by leading entrepreneurs, to date no personal vehicle is approved for road circulation in a “fully” or “semi ...
Xingshuai Dong, Massimiliano Cappuccio, Fady Alnajjar, Luqman Ali, Hamad Al Jassmi, Essam Debie, Milad Ghasrikhouzani, Alessandro Lanteri, Tate McGregor, Oleksandra Molloy, Alice Plebe, Michael Regan, Eduardo Sandoval, Dongmo Zhang   +13 more
wiley   +1 more source

Power-law Indices of EUV Intensity Power Spectrum in Flaring Coronal Active Regions

The Astrophysical Journal
Solar intensity power spectra are usually characterized by colored noise, with the spectral energy following a segmented power-law function of frequency, S ( f ) ∝ f ^− ^α , over different frequency ranges. Typically, the power-law index exceeds 1 in the
Sihui Zhong, Dmitrii Y. Kolotkov, Valery M. Nakariakov   +2 more
doaj   +1 more source

Econometrics at the Extreme: From Quantile Regression to QFAVAR1

Journal of Economic Surveys, EarlyView.
ABSTRACT This paper surveys quantile modelling from its theoretical origins to current advances. We organize the literature and present core econometric formulations and estimation methods for: (i) cross‐sectional quantile regression; (ii) quantile time series models and their time series properties; (iii) quantile vector autoregressions for ...
Stéphane Goutte, Konstantinos N. Konstantakis, Dimitris Konstantios, Panayotis G. Michaelides, Arsenios‐Georgios N. Prelorentzos   +4 more
wiley   +1 more source

Multiwavelength Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using Hα and EUV Spectra Taken by SMART/SDDI and SDO/EVE

The Astrophysical Journal
This paper presents a multiwavelength Sun-as-a-star analysis of the M8.7 flare on 2022 October 2, which was associated with a filament eruption and the subsequent coronal mass ejection.
Takato Otsu, Ayumi Asai
doaj   +1 more source

Multi-wavelength analysis of high energy electrons in solar flares: a case study of August 20, 2002 flare

, 2005
A multi-wavelength spatial and temporal analysis of solar high energy electrons is conducted using the August 20, 2002 flare of an unusually flat (gamma=1.8) hard X-ray spectrum.
A. Asai, A. Czaykowska, A. Klassen, A. Veronig, B. R. Dennis, B. R. Dennis, Brian R. Dennis, Ch. M. Johns, D. Alexander, E. Haug, E. P. Kontar, E. Rieger, Eduard P. Kontar, F. Fárník, G. D. Holman, G. D. Holman, G. J. Hurford, G. Trottet, H. Wang, J. C. Brown, J. C. Brown, J. C. Brown, J. Heyvaerts, Jana Kašparová, L. Fletcher, M. E. Machado, M. J. Aschwanden, M. Karlický, M. Lampton, M. Piana, M. Poquerusse, Marian KarlickÝ, N. Nitta, P. Démoulin, P. Heinzel, P. J. Cargill, R. A. Schwartz, R. C. Alexander, R. C. Canfield, R. C. Puetter, R. P. Lin, R. P. Lin, Richard A. Schwartz, S. G. Benka, T. Bai, T. R. Metcalf, V. N. Melnik, Y. Uchida   +47 more
core   +1 more source

Low-Energy Cutoffs in Electron Spectra of Solar Flares: Statistical Survey [PDF]

Solar Physics, 2008
9 pages, 5 figures, submitted to Solar ...
Kontar, E. P., Dickson, E., Kasparova, J.   +2 more
openaire   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Tests of a New Solar Flare Model Against D and E Region Ionosphere Data

Space Weather, 2022
We present results from a suite of models designed to simulate solar flare effects on the D and E region of the ionosphere. This suite includes models of the solar spectrum, the ionosphere and of HF radiowave propagation.
David E. Siskind, McArthur Jones Jr., Jeffrey W. Reep, Doug P. Drob, Srimoyee Samaddar, Scott M. Bailey, Shun‐Rong Zhang   +6 more
doaj   +1 more source