Results 51 to 60 of about 1,877,814 (242)
Revisiting the Question: The Cause of the Solar Cycle Variation of Total Solar Irradiance
Advances in Astronomy, 2019 The Mg II index and sunspot area are usually used to represent the intensification contribution by solar bright structures to total solar irradiance (TSI) and sunspot darkening, respectively.
N. B. Xiang
doaj +1 more source
Retinal dystrophies simulating geographic atrophy: A diagnostic challenge
Acta Ophthalmologica, EarlyView.Abstract Geographic atrophy (GA) is the chronic loss of retinal pigment epithelium, photoreceptors and choriocapillaris, marking the dry late stage of age‐related macular degeneration (AMD). GA prevalence is expected to rise in the upcoming decades. Advanced GA leads to central scotomas, reducing visual acuity and quality of life, potentially resulting
Johanna M. Colijn +3 more
wiley +1 more source
Applied Artificial Intelligence, 2022 Solar activity has significant impacts on human activities and health. One most commonly used measure of solar activity is the sunspot number. This paper compares three important non-deep learning models, four popular deep learning models, and their five
Yuchen Dang, Ziqi Chen, Heng Li, Hai Shu
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Acta Ophthalmologica, EarlyView.Abstract Purpose Early diagnosis of macular telangiectasia type 2 (MacTel) remains challenging, and the contribution of genetic variation to its clinical heterogeneity is unclear. This study investigated associations between MacTel risk variants and clinical characteristics in a Slovenian cohort.
Ajda Kunčič +4 more
wiley +1 more source
FUNCTIONAL SUNSPOT EQUILIBRIA [PDF]
Consider a one step forward looking model where agents believe that the equilibrium values of the state variable are determined by a function whose domain is the current value of the state variable and whose range is the value for the subsequent period ...
Shurojit Chatterji, Subir Chattopadhyay
core +2 more sources
Forecasting long-term sunspot numbers using the LSTM-WGAN model
Frontiers in Astronomy and Space SciencesThe sunspot number, an indicator of solar activity, is vital for forecasting variations in solar activity and predicting disturbances of the geomagnetic field.
Hao Yang +9 more
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On the periodic variations of geomagnetic activity indices Ap and ap [PDF]
Annales Geophysicae, 1998 Yearly averages of geomagnetic activity indices Ap for the years 1967–1984 are compared to the respective averages of ν2·Bs, where v is the solar wind velocity and Bs is the southward interplanetary magnetic field (IMF) component.
H. Schreiber, H. Schreiber
doaj +1 more source
Uniting the Sun’s Hale magnetic cycle and “extended solar cycle” paradigms
Frontiers in Astronomy and Space Sciences, 2022 Through meticulous daily observation of the Sun’s large-scale magnetic field the Wilcox Solar Observatory (WSO) has catalogued two magnetic (Hale) cycles of solar activity.
Scott W. McIntosh +4 more
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Legal restrictions, “sunspots,” and cycles
Journal of Economic Theory, 1989 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +3 more sources
Acta Ophthalmologica, EarlyView.Abstract Background Manual diabetic retinopathy (DR) grading may prefer certain regions and underestimate others. It is unclear if inexperienced graders' initial marking strategy reflects a specialist's marking pattern. Aims By the virtual ocular learning platform (VIOLA), we evaluated if initial DR‐lesion markings among inexperienced graders spatially
Simon Joel Ellerup Lowater +5 more
wiley +1 more source