Results 241 to 250 of about 4,611,274 (296)

The solar cycle: predicting the peak of solar cycle 25

Astrophysics and Space Science, 2020
Motivated by a successful prediction on the peak of solar cycle 24 (81.7, comparable to the observed 81.9, Du in Astrophys. Space Sci. 338:9, 2012), based on the logarithmic relationship between the maximum amplitude ( $R_{ \mathrm{m}}$ ) of a solar cycle and the preceding minimum $aa$ geomagnetic index ( $aa_{\mathrm{min}}$ ), we perform a ...
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The solar cycle

Physics Today, 1982
Nearly 140 years have elapsed since the German apothecary and amateur astronomer Samuel Heinrich Schwabe reported discovery of the solar cycle. “From my earlier observations,” Schwabe wrote in 1843, “it appears that there is a certain periodicity in the appearance of sunspots and this theory seems more and more probable from the results of this year ...
Gordon Newkirk, Kendrick Frazier
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Enhancement of pyramid solar distiller performance using reflectors, cooling cycle, and dangled cords of wicks

Desalination, 2021
A new working mechanism of the wick in the pyramid solar distiller was proposed. The cords wick pyramid solar still (CWPSS) had a parallel upper basin liner with a number of cracks above the original basin liner by 3.0 cm.
F. Essa, W. Alawee, S. Mohammed, A. S. Abdullah, Z. Omara   +4 more
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Theory of the solar cycle

Solar Physics, 1981
The properties of kinematic αω -dynamos are briefly reviewed. The mean field concept, including turbulent diffusivity, is defended against recent criticism. It is pointed out that although the Maunder minimum cannot be explained by kinematic dynamo theory alone, this does not invalidate dynamo theory in general.
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Change of Solar Oscillation Eigenfrequencies with the Solar Cycle

Nature, 1985
Solar p-mode eigenfrequencies depend on the radial stratification of the solar interior and this stratification may be perturbed by the mechanism of the 11-year magnetic activity cycle. Observations of long-term changes in p-mode oscillation frequencies may therefore help to identify the cause of the solar cycle.
Martin F. Woodard, Robert W. Noyes
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Thermoeconomic analysis of a novel combined cooling, heating and power system based on solar organic Rankine cycle and cascade refrigeration cycle

, 2021
This paper proposes a solar organic Rankine cycle integrated cascade refrigeration system to meet a hospital’s heating, cooling (each in two temperature levels) and electricity demands.
Zeinab Aghaziarati, A. H. Aghdam
semanticscholar   +1 more source

Solar Wind Variation with the Cycle

International Astronomical Union Colloquium, 2000
AbstractThe cyclic evolution of the heliospheric plasma parameters is related to the time-dependent boundary conditions in the solar corona. “Minimal” coronal configurations correspond to the regular appearance of the tenuous, but hot and fast plasma streams from the large polar coronal holes. The denser, but cooler and slower solar wind is adjacent to
I. S. Veselovsky, A. V. Dmitriev, A. V. Suvorova, M. V. Tarsina   +3 more
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Solar cycle characteristics and their application in the prediction of cycle 25

Journal of Atmospheric and Solar-Terrestrial Physics, 2018
The Solar Influences Data Analysis Center (SIDC) issued a new version (version 2) of the sunspot number data in July 2015. The 13-month smoothed monthly sunspot number from the new version is used for the first time to research the relations among the ...
F. Y. Li, D. Kong, J. L. Xie, N. Xiang, J. Xu   +4 more
semanticscholar   +1 more source

Solar cycles and malignant melanoma

Medical Hypotheses, 1979
There has been a sixfold increase in the incidence of malignant melanoma in the State of Connecticut during the past forty years. Superimposed on a steady incidence rise are cycles of markedly increased incidence rates which follow periods of maximum sunspot activity. We propose that the effect of sunspot cycles on human melanoma occurrence is mediated
M V, Viola, A, Houghton, E W, Munster
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A Simple Model for the Solar Cycle

Solar Physics, 2003
A simple nonlinear model which describes the 11-year solar cycle can be derived from the usual α−ω dynamo theory in the form of a Van der Pol equation. Solar activity displays also small-scale inter-cycle persistent stochastic oscillations with a Hurst exponent of the order of H≃0.76±0.01.
PONTIERI A, LEPRETI, Fabio, SORRISO VALVO L, VECCHIO A, CARBONE V.   +4 more
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