Results 91 to 100 of about 3,105 (240)

Regression Analysis of Sunspot Numbers for the Solar Cycle 24 in Comparison to Previous Three Cycles [PDF]

open access: yes, 2014
Sunspots are temporary phenomena on the photosphere of the Sun which appear visibly as dark spots compared to surrounding regions. Sunspot populations usually rise fast but fall more slowly when observed for any particular solar cycle.
Halder, Debojyoti
core   +1 more source

A 51‐year‐old female presenting with headache and vision loss

open access: yes
Headache: The Journal of Head and Face Pain, EarlyView.
Laurel Ovrom   +3 more
wiley   +1 more source

Comparative Cochlear–Vestibular Aging Reveals Age‐Aligned Mitochondrial Ultrastructural Burden, Mitophagy–Autophagy Remodeling, Synaptic Uncoupling, and Sensory Functional Decline

open access: yesAging Cell, Volume 25, Issue 7, July 2026.
This study maps age‐aligned cochlear and vestibular decline in SAMP8 mice, linking functional impairment with synaptic vulnerability, mitochondrial ultrastructural injury, and autophagy/mitophagy–lysosome transcriptional remodeling. The findings provide an integrated framework for understanding shared inner‐ear aging trajectories.
Jingyi Xie   +14 more
wiley   +1 more source

Influence of the sunspot cycle on the Northern Hemisphere wintertime circulation from long upper-air data sets [PDF]

open access: yes, 2012
Here we present a study of the 11 yr sunspot cycle's imprint on the Northern Hemisphere atmospheric circulation, using three recently developed gridded upper-air data sets that extend back to the early twentieth century.
E. Rozanov   +8 more
core   +1 more source

Comparison between variations in solar UV radiation and sunspot parameters with Mg II daily index as a proxy

open access: yesPhysics Open
Solar UV radiation influence the Earth's climate and upper atmosphere. The UV emission from the Sun modulates with the sunspot cycle with an 11-year periodicity.
(G) Chandrika   +2 more
doaj   +1 more source

The technical and practical implementation of fundus photography in equids

open access: yesEquine Veterinary Education, Volume 38, Issue 7, Page 371-381, July 2026.
Summary Background Fundus photography is an important diagnostic tool in human and veterinary medicine. Advances in research are increasing its accessibility in human medicine. However, there is a lack of studies on modern fundus photography in animals, particularly in horses. Objectives To assess the use of a portable fundus camera developed for human
I. Vierling, B. Wollanke, V. Franzen
wiley   +1 more source

The sunspot cycle revisited [PDF]

open access: yesJournal of Physics: Conference Series, 2013
The set of sunspot numbers observed since the invention of the telescope is one of the most studied time series in astronomy and yet it is also one of the most complex. Fourteen frequencies are found in the yearly mean sunspot numbers from 1700 to 2011using the Lomb-Scargle periodogram and prewhitening.
openaire   +1 more source

Spatiotemporal Evolution of Hydroclimatic Variables in the Brazilian Semi‐Arid Region Through the Aridity Index and Susceptibility to Desertification

open access: yesInternational Journal of Climatology, Volume 46, Issue 8, 30 June 2026.
Over the past 60 years, noticeable changes have been observed in the main hydroclimatological variables, driven by both natural and anthropogenic factors. In the context of climate change, such behaviour may adversely affect the state's economic activities, as well as increase the recurrence of extreme events in the region.
Ronaldo Guilherme Santos Lima   +4 more
wiley   +1 more source

On the Importance of Cycle Minimum in Sunspot Cycle Prediction

open access: yes, 1996
The characteristics of the minima between sunspot cycles are found to provide important information for predicting the amplitude and timing of the following cycle. For example, the time of the occurrence of sunspot minimum sets the length of the previous
Hathaway, David H.   +2 more
core  

The heliospheric Hale cycle over the last 300 years and its implications for a “lost” late 18th century solar cycle

open access: yesJournal of Space Weather and Space Climate, 2015
A Hale cycle, one complete magnetic cycle of the Sun, spans two complete Schwabe cycles (also referred to as sunspot and, more generally, solar cycles). The approximately 22-year Hale cycle is seen in magnetic polarities of both sunspots and polar fields,
Owens Mathew J.   +3 more
doaj   +1 more source

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