Results 51 to 60 of about 986,682 (175)

Analysis of the Solar Flare Index for Solar Cycles 18-24: Extremely Deep Gnevyshev Gap in the Chromosphere [PDF]

open access: yes, 2023
We study the solar flare index (SFI) for the solar cycles 18\,--\,24. We find that SFI has deeper Gnevyshev gap (GG) in its first principal component than other atmospheric parameters. The GG is extremely clear especially in the even cycles.
Takalo, Jouni J.   +2 more
core   +1 more source

SCATTERING POLARIZATION IN SOLAR FLARES [PDF]

open access: yesThe Astrophysical Journal, 2013
There is an ongoing debate about the origin and even the very existence of a high degree of linear polarization of some chromospheric spectral lines observed in solar flares. The standard explanation of these measurements is in terms of the impact polarization caused by non-thermal proton and/or electron beams.
Stepan, Jiri, Heinzel, Petr
openaire   +2 more sources

Management of chronic urticaria: Current status and future prospect

open access: yesJournal of the European Academy of Dermatology and Venereology, EarlyView.
Chronic urticaria is driven by mast cell activation through autoimmune, inflammatory, and neuroimmune pathways. A structured approach combining diagnosis, patient‐reported outcomes, stepwise therapy, treatment optimization, monitoring and emerging targeted agents may improve disease control and enable more personalized management.
Andaç Salman   +15 more
wiley   +1 more source

The effect of colour on the thermal performance of building integrated solar collectors [PDF]

open access: yes, 2010
The use of solar collectors with coloured absorbers for water heating is an area of particular interest when considering their integration with buildings.
Carson, James K.   +2 more
core   +1 more source

High-resolution Observations of a C9.3 White-light Flare and Its Impact on the Solar Photosphere

open access: yesThe Astrophysical Journal Letters
We present a detailed analysis of a C9.3 white-light flare using high-resolution observations from the New Vacuum Solar Telescope. The flare occurred near the eastern solar limb on 2023 September 11, within NOAA AR 13431, and produced beam electrons with
Zhe Xu   +6 more
doaj   +1 more source

Photochemical effects of Mars‐like UV irradiation on carboxylic acids in carbonaceous chondrites and expectations for abiotic background organics on Mars

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner   +7 more
wiley   +1 more source

The White-light Emissions in Two X-class Flares Observed by ASO-S and CHASE

open access: yesThe Astrophysical Journal Letters
The white-light continuum emissions in solar flares (i.e., white-light flares) are usually observed on the solar disk but, in a few cases, off the limb.
Ying Li   +11 more
doaj   +1 more source

Mapping Oil Spills and Offshore Industrial Activities in the Northwest Atlantic for Marine Conservation and Management

open access: yesGeoscience Data Journal, Volume 13, Issue 4, October 2026.
An integrated, high‐resolution map of cumulative anthropogenic pressures in the Northwest Atlantic, combining oil pollution, offshore infrastructure, vessel traffic and artificial light. This harmonized dataset supports reproducible assessments of cumulative risk and informs marine spatial planning, conservation and management across Canada's EEZ and ...
David Beauchesne   +7 more
wiley   +1 more source

Solar Flare Intensity Prediction With Machine Learning Models

open access: yesSpace Weather, 2020
We develop a mixed long short‐term memory (LSTM) regression model to predict the maximum solar flare intensity within a 24‐hr time window 0–24, 6–30, 12–36, and 24–48 hr ahead of time using 6, 12, 24, and 48 hr of data (predictors) for each Helioseismic ...
Zhenbang Jiao   +6 more
doaj   +1 more source

FEATURES OF THE DEVELOPMENT OF A CIRCULAR SOLAR FLARE

open access: yesOdessa Astronomical Publications, 2020
We present the results of the analysis of morphology and evolution of the circular solar flare using H-alpha images. H-alpha filtergrams were obtained with the Meudon spectroheliograph.
S N. Chornogor, N. N. Kondrashova
doaj   +1 more source

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