Results 91 to 100 of about 9,553 (254)

Characteristics of the Solar Differential Rotation and Activity During Solar Cycle No. 24

Universe
An analysis of the solar differential rotation (DR) during solar cycle No. 24 (SC24) (2009–2019), based on the Kanzelhöhe Observatory for Solar and Environmental Research (KSO) data set, is presented.
Ivana Poljančić Beljan, Luka Šibenik, Klaudija Lončarić, Tomislav Jurkić, Rajka Jurdana-Šepić, Werner Pötzi, Damir Hržina, Roman Brajša, Astrid M. Veronig, Arnold Hanslmeier   +9 more
doaj   +1 more source

A Recount of Sunspot Groups on Staudach’s Drawings [PDF]

Solar Physics, 2016
We have examined the more than 1100 drawings of the solar disk made by the German astronomy amateur Johann Caspar Staudach during 1749-1799 and counted the spots on each image. Using the modern perception of how to group spots into active regions we regrouped the spots as a modern observer would.
openaire   +2 more sources

Randomized, single‐centre, double‐blinded repeated dose investigation of safety and tolerability of ocular administrations of a novel silica eye drop product in healthy volunteers

Acta Ophthalmologica, EarlyView.
Abstract Purpose Managing ocular diseases often requires frequent eye drop administration, which can challenge patient compliance. A long‐acting eye drop technology using an amorphous synthetic silica composite was developed to address this. Our study aimed to assess the safety and tolerability of the Silica Eye Drop platform in healthy volunteers over
Aleksandra Poluianova, Marceline N. Akieh‐Pirkanniemi, Arto Hartikainen, Hanna Arstila, Kai Kaarniranta, Lasse Leino   +5 more
wiley   +1 more source

Tilt Angles of Sunspot Groups in Different Latitude Bands and the Amplitude of the Next Solar Cycle

The Astrophysical Journal
In the Babcock–Leighton and Parker dynamo models, the tilt angle of a sunspot group (SG) and the turbulence in the solar convection zone (one widely accepted generation mechanism responsible for the scatter of the tilt angles of SGs around the mean ...
P. X. Gao
doaj   +1 more source

Harmonizing Sunspot Datasets Consistency: Focusing on SOHO/MDI and SDO/HMI Data

Universe
To ensure the long-term consistency of sunspot group data, it is essential to harmonize measurements from SOHO/MDI and SDO/HMI, two major solar observatories with overlapping coverage.
Barbara Góra-Gálik, Emese Forgács-Dajka, Istvan Ballai   +2 more
doaj   +1 more source

Prognostic factors of optical coherence tomography angiography in intermediate and advanced primary open‐angle glaucoma: A systematic review and meta‐analysis

Acta Ophthalmologica, EarlyView.
Abstract Conventional optical coherence tomography (OCT) has a floor effect in patients with severe visual field loss, such as seen in advanced primary open‐angle glaucoma (POAG). OCT angiography (OCTA) does not suffer from such a floor effect. However, which OCTA parameters are most useful for monitoring longitudinal progression is unclear.
Kamya Katarya, Victor A. de Vries, João Barbosa‐Breda, Luisa Sanchez Brea, Danilo Andrade De Jesus, Wishal D. Ramdas   +5 more
wiley   +1 more source

Solar Observations by Angelo Secchi: An Analysis of His Diary and Annotations in His Sunspot Drawings

The Astrophysical Journal
Angelo Secchi, a pioneer in solar physics, provided an extensive and regular record of sunspot observations spanning the period 1858–1878. This study analyzes the handwritten records by Secchi and collaborators in the form of drawings and an observation ...
V. M. S. Carrasco, I. Ermolli, A. J. P. Aparicio, T. Chatzistergos   +3 more
doaj   +1 more source

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

Physics 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, Belur Ravindra, Vijay Kumar Doddamani   +2 more
doaj   +1 more source

Outcomes and complications of sponges versus tires for scleral buckling in primary rhegmatogenous retinal detachment: The Manchester Buckle Study

Acta Ophthalmologica, EarlyView.
Abstract Purpose To compare preoperative characteristics and postoperative anatomical and functional outcomes of scleral buckle surgery using sponges versus tires, as well as explant‐related complications and the frequency of explant removal. Methods This retrospective study included patients with primary rhegmatogenous retinal detachment (RRD) who ...
Peter Kiraly, Myrta Lippera, Naseer Ally, Ritu Agarwal, George Moussa, Tsveta Ivanova, Felipe Dhawahir‐Scala, Niall Patton, George Turner, Stephen Charles, Assad Jalil, Kirti M. Jasani   +11 more
wiley   +1 more source

Analyses of Johannes Kepler’s Sunspot Drawings in 1607: A Revised Scenario for the Solar Cycles in the Early 17th Century

The Astrophysical Journal Letters
Telescopic 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, Koji Murata, E. Thomas H. Teague, Sabrina Bechet, Mitsuru Sôma   +4 more
doaj   +1 more source