Results 21 to 30 of about 541,779 (282)
Solar Cycle Dependence of Solar p Modes [PDF]
Symposium - International Astronomical Union, 1988 Data obtained at Izana (Tenerife) and Haleakala (Maui), using optical resonant scattering with a potassium vapour cell over the years 1980–84, are used to determine the frequencies of the low ℓ p modes. Possible variation in these frequencies with the solar cycle are investigated.
G.R. Isaak +7 more
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Solar Cycle 25 Prediction Using N-BEATS
The Astrophysical Journal, 2023 Solar activities lead to Sun variation with an 11 yr periodicity. The periodic variation affects space weather and heliophysics research. So it is important to accurately predict solar cycle variations. In this paper, we predicted the ongoing Solar Cycle
Xu Su +4 more
doaj +1 more source
Prediction of even and odd sunspot cycles
Journal of Space Weather and Space Climate, 2023 Here we study the prediction of even and odd numbered sunspot cycles separately, thereby taking into account the Hale cyclicity of solar magnetism. We first show that the temporal evolution and shape of all sunspot cycles are extremely well-described by ...
Asikainen Timo, Mantere Jani
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Earth, Planets and Space, 2019 In order to statistically investigate the relationship between the low-latitude coronal holes (CHs), the solar wind speed, and the geomagnetic activity in solar cycles 23 (1996–2008) and 24 (2009–2016), we conducted a superposed epoch analysis of the ...
Yumi Nakagawa +2 more
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Parameters estimation and life cycle economic analysis of a PV powered tri-cycle in India [PDF]
Archives of Electrical Engineering, 2018 This paper is devoted towards life cycle economic analysis (LCEA) of a solar photovoltaic (PV) powered tri-cycle. The paper is meant to propose a more systematic approach in determining the optimum use of scarce resources in order to determine the most ...
Soumya Das +4 more
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Five Solar Cycles of Solar Corona Investigations
Solar Physics, 2022 AbstractThese are the memoirs of fifty years of research in solar physics, closely related to the history of three of the major solar space missions, from the Solar Maximum Mission, SMM, to Solar Orbiter, at present in navigation toward vantage points closer and closer to the Sun.
openaire +2 more sources
Energies, 2022 This paper investigates and compares several highly efficient thermodynamic cycles that are suitable for coupling with particle-in-tube fluidized-bed solar receiver technology.
Miguel Angel Reyes-Belmonte +1 more
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Variation of Solar, Interplanetary and Geomagnetic Parameters during Solar Cycles 21-24 [PDF]
Journal of Astronomy and Space Sciences, 2013 The length of solar cycle 23 has been prolonged up to about 13 years. Many studies have speculated that the solar cycle 23/24 minimum will indicate the onset of a grand minimum of solar activity, such as the Maunder Minimum.
Suyeon Oh, Bogyeong Kim
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GONG p-mode frequency changes with solar activity [PDF]
, 1999 We present a correlation analysis of GONG p-mode frequencies with nine solar activity indices for the period 1995 August to 1997 August. This study includes spherical harmonic degree in the range 2 to 150 and the frequency range of 1500-3500 \mu Hz ...
A. Bhatnagar +4 more
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A solar cycle lost in 1793--1800: Early sunspot observations resolve the old mystery [PDF]
, 2009 Because of the lack of reliable sunspot observation, the quality of sunspot number series is poor in the late 18th century, leading to the abnormally long solar cycle (1784--1799) before the Dalton minimum. Using the newly recovered solar drawings by the
Charbonneau +12 more
core +1 more source