Results 21 to 30 of about 28,762 (292)
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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Lifetime of Sunspots and Pores
Solar Physics, 2023 The lifetime of individual sunspots and pores is analyzed according to Solar Dynamics Observatory/Helioseismic and Magnetic Imager (SDO/HMI) data from the period 2010 – 2022. It is found that the lifetime of individual sunspots and pores differs from the
A. Tlatov
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On rising magnetic flux tube and formation of sunspots in a deep domain [PDF]
, 2020 We investigate the rising flux tube and the formation of sunspots in an unprecedentedly deep computational domain that covers the whole convection zone with a radiative magnetohydrodynamics simulation.
Hideyuki Hotta, H. Iijima
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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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Investigation of the sunspots and GDP nexus: The case of Balkan countries [PDF]
Ekonomski Anali, 2023 The phenomenon known as sunspots refers to regions of the Sun’s photosphere that are darker than their surroundings because their surface temperature is lower.
Žmuk Berislav, Jošić Hrvoje
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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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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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Non-standard magnetohydrodynamics equations and their implications in sunspots
Proceedings of the Royal Society A, 2020 In this work, we study the physics of plasma waves and magnetohydrodynamic (MHD) equilibrium of sunspots based on the concept of non-standard Lagrangians which play an important role in several branches of science. We derived the modified fluid equations
R. El-Nabulsi
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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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