Results 21 to 30 of about 1,057 (192)
Long-term solar activity explored with wavelet methods [PDF]
Annales Geophysicae, 2006 Long-term solar activity has been studied with a set of wavelet methods. The following indicators of long-term solar activity were used; the group sunspot number, the sunspot number, and the 14C production rate.
H. Lundstedt +3 more
doaj +1 more source
Active Days around Solar Minimum and Solar Cycle Parameter
Journal of Astronomy and Space Sciences, 2021 Utilizing a new version of the sunspot number and group sunspot number dataset available since 2015, we have statistically studied the relationship between solar activity parameters describing solar cycles and the slope of the linear relationship ...
Heon-Young Chang
doaj +1 more source
Sunspot numbers: Implications on Eastern African rainfall
South African Journal of Science, 2014 Following NASA’s prediction of sunspot numbers for the current sunspot cycle, Cycle 24, we now include sunspot numbers as an explanatory variable in a statistical model. This model is based on fitting monthly rainfall values with factors and covariates
Francis Gachari +2 more
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Time variations of the ionosphere at the northern tropical crest of ionization at Phu Thuy, Vietnam [PDF]
Annales Geophysicae, 2011 This study is the first which gives the climatology of the ionosphere at the northern tropical crest of ionization in the Asian sector. We use the data from Phu Thuy station, in Vietnam, through three solar cycles (20, 21 and 22), showing the complete
H. Pham Thi Thu +3 more
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PROGNOSES AND ANOMALY OF 24TH CYCLE OF SOLAR ACTIVITY
Odessa Astronomical Publications, 2014 Development of solar activity in 24th cycle has specific peculiarity – non-monotonous increasing of solar activity on grown phase which occurs for 1/3 number of all cycles.
V. G. Lozitsky, V. M. Efimenko
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2023 Sunspot records reveal that whilst the Sun has an approximately 11 year cycle of activity, no two cycles are of the same duration. Since this activity is a direct driver of space weather at Earth, this presents an operational challenge to quantifying ...
S. C. Chapman, S. C. Chapman
doaj +1 more source
The Astrophysical Journal LettersTelescopic sunspot observations began in 1610 and captured subsequent solar cycles. In combination with proxy reconstructions on an annual scale, these data sets indicate a gradual transition between regular solar cycles and the Maunder Minimum.
Hisashi Hayakawa +4 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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Modulation of the sunspot cycle [PDF]
Astronomy & Geophysics, 2010 Solar activity has been abnormally high for the last half-century, but the extremely feeble start of the latest 11-year cycle suggests that this episode is probably coming to an end. This prospect raises some fascinating and important issues, involving an extremely wide range of timescales, writes Nigel Weiss.
openaire +1 more source
Molecular and Cellular Hallmarks of Age‐Related Vestibular Hair Cell Degeneration
Advanced Science, EarlyView.This study utilizes single‐cell RNA‐seq transcriptomes, advanced imaging, and electrophysiology to examine universal and cell‐type‐specific aging signatures of vestibular hair cells. The study shows that impaired hair bundle function is a key driver of age‐related vestibular dysfunction.
Samadhi Kulasooriya +10 more
wiley +1 more source