Results 11 to 20 of about 21,069 (265)
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
doaj +2 more sources
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
doaj +2 more sources
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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First Principles Rovibronic Absorption Spectra of HF Molecule [PDF]
Journal of Computational Chemistry, Volume 47, Issue 6, March 5, 2026.Hydrogen fluoride (HF) is astrophysically important, as it has been detected in sunspots, Venus, red giants, and the interstellar medium, serving as a probe of exoplanet atmospheres. This article presents an ab initio investigation of HF rovibronic spectroscopy, combining high‐level electronic‐structure data with nuclear‐motion solutions and refinement
Nariman Abu El Kher +5 more
wiley +2 more sources
Journal of Water and Climate Change, 2023 The Haihe River basin is the main grain production base and the highland of economic strategic development in China. Based on daily meteorological data during 1960–2020, the characteristics of drought evolution in the Haihe River basin were analyzed by ...
Minhua Ling +4 more
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Helicity of the solar magnetic field [PDF]
, 2010 Helicity measures complexity in the field. Magnetic helicity is given by a volume integral over the scalar product of magnetic field {\bf B} and its vector potential {\bf A}.
Tiwari, Sanjiv Kumar
core +1 more source
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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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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Effect of suppressed excitation on the amplitude distribution of 5-min oscillations in sunspots [PDF]
, 2007 Five-minute oscillations on the Sun (acoustic and surface gravity waves) are excited by subsurface turbulent convection. However, in sunspots the excitation is suppressed because strong magnetic field inhibits convection.
Kosovichev, A. G., Parchevsky, K. V.
core +1 more source
The transition region above sunspots
Geoscience Letters, 2018 Over decades, sunspots and their fine structures have been studied in detail at the photospheric level with different ground-based telescopes, as the surface of the Sun primarily emits light in the visible wavelengths.
Hui Tian, Tanmoy Samanta, Jingwen Zhang
doaj +1 more source