Results 1 to 10 of about 11,976 (273)
Characterizing the Solar Activity Using the Visibility Graph Method [PDF]
Entropy, 2023 In this paper, the Sun and its behavior are studied by means of complex networks. The complex network was built using the Visibility Graph algorithm. This method maps time series into graphs in which every element of the time series is considered as a ...
Tomás Zurita-Valencia, Víctor Muñoz
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Complex Network Study of Solar Magnetograms [PDF]
Entropy, 2022 In this paper, we study solar magnetic activity by means of a complex network approach. A complex network was built based on information on the space and time evolution of sunspots provided by image recognition algorithms on solar magnetograms taken ...
Víctor Muñoz, Eduardo Flández
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Locally weighted regression for sunspots estimation and prediction [PDF]
المجلة العراقية للعلوم الاحصائية, 2022 Locally weighted regression (LOESS) is a modern non-parametric regression method designed for treating cases where classical procedures are not highly efficient or cannot applied efficiently.
Ibtehal Fadel, Muzahem Al-Hashimi
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Relations Among Sunspots, CMEs and Geomagnetic Storms in Solar Cycle 23 [PDF]
Journal of Astronomy and Space Sciences, 2009 We compare the relation among the annual distribution of sunspots: coronal mass ejections (CMEs) and geomagnetic storms and North-South asymmetry during solar cycle 23.
Su-Lyun Rho, Heon-Young Chang
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Symposium - International Astronomical Union, 1988 The 5 minute oscillations in a sunspot umbra are the response of the sunspot to forcing by the 5 minute p-modes in the surrounding convection zone (Thomas 1981). This interaction of solar p-modes with a sunspot can be used to probe the structure of a sunspot beneath the visible surface of the Sun (Thomas, Cram, and Nye 1982). Here we report briefly the
John H. Thomas +2 more
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SIPNet & SAHI: Multiscale Sunspot Extraction for High-Resolution Full Solar Images
Applied Sciences, 2023 Photospheric magnetic fields are manifested as sunspots, which cover various sizes over high-resolution, full-disk, solar continuum images. This paper proposes a novel deep learning method named SIPNet, which is designed to extract and segment multiscale
Dongxin Fan +5 more
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Functional sunspot equilibria [PDF]
Journal of Mathematical Economics, 2006 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CHATTERJI, Shurojit +1 more
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Relationship between Solar Flux and Sunspot Activity Using Several Regression Models
JIF (Jurnal Ilmu Fisika), 2023 This study examines the correlation and prediction between sunspots and solar flux, two closely related factors associated with solar activity, covering the period from 2005 to 2022. The study utilizes a combination of linear regression analysis and the
Ruben Cornelius Siagian +6 more
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Sensors, 2021 Strong flares and coronal mass ejections (CMEs), launched from δ-sunspots, are the most catastrophic energy-releasing events in the solar system. The formations of δ-sunspots and relevant polarity inversion lines (PILs) are crucial for the understanding ...
Che-Jui Chang, Jean-Fu Kiang
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Evolutions of various solar indices around sunspot maximum and sunspot minimum years [PDF]
Annales Geophysicae, 2002 The smoothed monthly sunspot numbers showed that in many solar cycles, (a) during years around sunspot maxima, there was only one prominent maximum, but in some cycles there was a broad plateau. If the beginning and end of these are termed as first
R. P. Kane, R. P. Kane
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