Results 21 to 30 of about 5,860 (269)
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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Multiple-scale Temporal Variability of Climatic Time Series in the Western Region of Iran [PDF]
Sustainable Earth Trends, 2023 The current research aims to carry out a multi-timescale variability analysis for the time series of sunspots (SN), precipitation (Pr), and maximum temperature (Tmax) in four main stations in the western area of Iran.
Abolfazl Neyestani
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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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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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PENGEMBANGAN ALAT PERAGA BINTIK MATAHARI MENGGUNAKAN LED BERBASIS ARDUINO
Spektra: Jurnal Fisika dan Aplikasinya, 2017 Abstrak Bintik matahari yang terjadi dalam kehidupan sehari-hari merupakan hal menarik untuk divisualisasikan melalui alat peraga dalam proses belajar menganjar.
Yoky Novra Silta, Yudhiakto Pramudya
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