Results 101 to 110 of about 1,877,814 (242)
Spot cycle reconstruction: an empirical tool:Application to the sunspot cycle
, 2015 Context. The increasing interest in understanding stellar magnetic activity cycles is a strong motivation for the development of parameterized starspot models which can be constrained observationally.Aims.
Cunha, M. S. +7 more
core +1 more source
Journal 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
Clinical Case Reports, Volume 14, Issue 9, September 2026.ABSTRACT Retinal astrocytichamartoma (RAH) is a rare benign glial neoplasm most commonly associated with tuberous sclerosis complex (TSC). Sporadic cases, occurring in the absence of systemic phakomatosis, are uncommon and may closely mimic retinoblastoma, particularly when presenting with a calcified intraocular mass, creating a diagnostic challenge ...
Mesfin Wubishet Gurmu +7 more
wiley +1 more source
Journal of Comparative Neurology, Volume 534, Issue 9, September 2026.The annual turquoise killifish (Nothobranchius furzeri) cone photoreceptor mosaic is an ordered lattice but lacks regularity of cone subtypes in adulthood. The cone mosaic differs between life stages and has characteristics observed in other fishes adapted for life in turbid water.
Nicole C. L. Noel
wiley +1 more source
, 2009 The 11-year sunspot cycle was discovered by an amateur astronomer in 1844. Visual and photographic observations of sunspots have been made by both amateurs and professionals over the last 400 years.
Hathaway, David H.
core
An Examination of Sunspot Number Rates of Growth and Decay in Relation to the Sunspot Cycle [PDF]
, 2006 On the basis of annual sunspot number averages, sunspot number rates of growth and decay are examined relative to both minimum and maximum amplitudes and the time of their occurrences using cycles 12 through present, the most reliably determined sunspot ...
Hathaway, David H., Wilson, Robert M.
core
A response model for the sunspot cycle
, 2021 The sunspot record for the time interval 1700-2001 can be considered as a sequence of independent, partly overlapping events, triggered quasi-periodically at intervals of the order of 11 years. The individual cycles are approximated by the step response
De Meyer, F.
core
Endocrinology, Diabetes &Metabolism, Volume 9, Issue 5, September 2026.This study developed and validated a machine learning‐based prognostic model for predicting long‐term visual outcomes after pars plana vitrectomy (PPV) in patients with proliferative diabetic retinopathy. ABSTRACT Introduction This study aims to develop a machine‐learning‐based risk prediction model for a long‐term visual prognosis in patients with ...
Xiaolu Wang +7 more
wiley +1 more source
Was one sunspot cycle in the 18th century really lost?
, 2002 The unusually long 4th solar cycle has recently been proposed by Usoskin et al. (2001) to be composed of two cycles. They argue that a weak and short cycle might have been lost in sparse sunspot data at the end of the 18th century.
Krivova, N. +7 more
core +1 more source
Journal of Extracellular Biology, Volume 5, Issue 9, September 2026.ABSTRACT Vision impairment caused by age‐related macular degeneration (AMD) is a global health priority. Retinal pathology is driven by ageing and exacerbated by genetic and environmental risk factors. Peripheral blood circulation is increasingly recognised as a contributor to disease initiation and progression, and a source of biomarkers to support ...
Marzena Kurzawa‐Akanbi +17 more
wiley +1 more source