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Can Sunspot Activity Affect the Population Dynamics of Cotton Bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)? [PDF]
InsectsWhether there is a correlation between sunspots and an impact on insects has long been a subject of debate. As a worldwide pest, the cotton bollworm can feed on a variety of plants and cause great harm to agriculture.
Jian Huang, Xiaojun Wang
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Forecasting the number of sunspots for solar cycle 25 utilizing the facebook prophet model [PDF]
Scientific ReportsThe solar cycle, also referred to as the solar magnetic activity cycle, represents a nearly periodic change in solar activity occurring approximately every 11 years, as evidenced by the observation of sunspot numbers.
H. I. Abdel Rahman, W. A. Badawy
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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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THE SPECTROPHOTOMETRIC OBSERVATIONS OF THE SUNSPOTS
Современная наука и инновации, 2022 Observing sunspots and studying their magnetic fields is one of the daily tasks of modern heliophysics. At the end of the 19th century, Pieter Zeeman conducted a series of experiments to experimentally test whether atoms have magnetic properties.
U. P. Ibragimowa +3 more
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Journal of Space Weather and Space Climate, 2023 On a centennial timescale, solar activity oscillates quasi-periodically and also tends to occasionally get into a low-activity period. The Dalton Minimum (circa 1790s–1820s) was one of such low-activity periods that had been captured in telescopic ...
Hayakawa Hisashi +3 more
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Does Correction Factor Vary with Solar Cycle? [PDF]
Journal of Astronomy and Space Sciences, 2012 Monitoring sunspots consistently is the most basic step required to study various aspects of solar activity. To achieve this goal, the observers must regularly calculate their own correction factor k and keep it stable. Relatively recently, two observing
Heon-Young Chang, Sung-Jin Oh
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Sunspot observations at Kawaguchi Science Museum: 1972 – 2013
Geoscience Data Journal, 2023 Individual sunspot observations have formed a ground basis of international sunspot number, a unique reference for long‐term solar variability in the centennial timescale.
Hisashi Hayakawa +5 more
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When I Encountered Difficult Problems
Frontiers in Astronomy and Space Sciences, 2022 All of us encounter our unique difficulties as scientists. Although the kind of difficulty varies by scientist, I describe my own in this program, and explain how I responded, together with a sort of moral.
Syun-Ichi Akasofu
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Atmosphere, 2021 Based on the daily sunspot number (SN) data (1954–2011) from the Purple Mountain Observatory, the extreme value theory (EVT) is employed for the research of the long-term solar activity. It is the first time that the EVT is applied on the Chinese SN. Two
Yan-Qing Chen +5 more
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PENERAPAN METODE AUTOREGRESSIVE INTEGRATED MOVING AVERAGE (ARIMA) UNTUK PREDIKSI BILANGAN SUNSPOT
Barekeng, 2021 Peristiwa magnetik pada matahari ditandai dengan salah satu tanda yaitu munculnya sunspot atau bintik matahari. Sunspot terletak di fotosfer matahari yang memiliki warna lebih gelap dari pancaran sekitarnya.
Felia Dria Yuliawanti +4 more
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