Results 311 to 320 of about 12,501,323 (353)
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Solar activity and the solar cycle
Advances in Space Research, 2003Abstract Solar activity prediction methods have been wide-ranging, mostly numerical, and essentially curve fitting. Thus for many years the search for physically based methods has remained elusive. Surprisingly, a new class of methods does seem to be making progress, and it relates to the structure of the field within the Sun and heliosphere.
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Solar activity and the solar wind
Reviews of Geophysics, 1979The availability of in situ solar wind observations from the complete sunspot cycle 20 (1964–1976) suggests an examination of the changes in the character of the solar wind related to the solar cycle and comparison of these observed changes with those expected from earlier studies of solar‐terrestrial physics.
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, 2020
Solar-driven distillation is now considered as a rising technology for the supply of fresh water in the rare areas. As the crucial part of solar distillation, photothermal materials have been flourished investigated.
Yingli Xu +6 more
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Solar-driven distillation is now considered as a rising technology for the supply of fresh water in the rare areas. As the crucial part of solar distillation, photothermal materials have been flourished investigated.
Yingli Xu +6 more
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, 2020
Introducing oxygen vacancies (Vo) into TiO2 photocatalyst has been considered an effective strategy for improving co-catalyst-free solar photocatalytic activity.
M. Esmat +6 more
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Introducing oxygen vacancies (Vo) into TiO2 photocatalyst has been considered an effective strategy for improving co-catalyst-free solar photocatalytic activity.
M. Esmat +6 more
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Reviews of Geophysics, 1973
The changes in the sun's surface and atmosphere, normally referred to as solar activity, are intimately linked to the production, transport, and dissipation of magnetic fields. The most obvious manifestations of the changes are sunspots, flares, and the changing corona. The complex of solar activity can be divided into two parts: (1) the problem of the
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The changes in the sun's surface and atmosphere, normally referred to as solar activity, are intimately linked to the production, transport, and dissipation of magnetic fields. The most obvious manifestations of the changes are sunspots, flares, and the changing corona. The complex of solar activity can be divided into two parts: (1) the problem of the
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Critical Analysis of a Hypothesis of the Planetary Tidal Influence on Solar Activity
Solar Physics, 2014The present work is a critical revision of the hypothesis of the planetary tidal influence on solar activity published by Abreu et al. (Astron. Astrophys.548, A88, 2012; called A12 here).
S. Poluianov, I. Usoskin
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IS THE SOLAR ACTIVITY CYCLE SYNCHRONIZED WITH THE SOLAR INERTIAL MOTION?
International Journal of Bifurcation and Chaos, 2000The 300 year record of the yearly sunspot numbers and numerically generated trajectory of the solar inertial motion (SIM) were subjects of a synchronization analysis. Phase synchronization of the sunspot cycle and a fast component of the SIM have been found and confirmed with statistical significance in three epochs (1727–1757, 1802–1832 and 1863–1922)
Milan Palus +4 more
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Solar Energy, 2018
Photocatalytic semiconductors have attracted much attention due to their effective harvesting of solar energy for chemical synthesis and wastewater treatment.
Xinzhi Wang +5 more
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Photocatalytic semiconductors have attracted much attention due to their effective harvesting of solar energy for chemical synthesis and wastewater treatment.
Xinzhi Wang +5 more
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Reviews of Geophysics, 1983
During the past four years, the emphasis in much of the solar research in the United States gradually shifted from the structure of active regions to the nature of the impulsive phase of flares. The first two years of the review interval were dominated by completion of the Skylab data analyses, and especially by the Skylab Workshops on Solar Active ...
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During the past four years, the emphasis in much of the solar research in the United States gradually shifted from the structure of active regions to the nature of the impulsive phase of flares. The first two years of the review interval were dominated by completion of the Skylab data analyses, and especially by the Skylab Workshops on Solar Active ...
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1992
The magnetic cycle lasts 22 years, reversing polarity in each 11-year half. Spots reach the surface in emerging flux regions (EFR) and grow in complexity. Ephemeral regions bring considerable flux to the surface, but play no great role. Diffusion models of the cycle are discussed, but the low observed diffusion constant makes them a poor fit to reality.
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The magnetic cycle lasts 22 years, reversing polarity in each 11-year half. Spots reach the surface in emerging flux regions (EFR) and grow in complexity. Ephemeral regions bring considerable flux to the surface, but play no great role. Diffusion models of the cycle are discussed, but the low observed diffusion constant makes them a poor fit to reality.
openaire +2 more sources