Results 111 to 120 of about 5,646,026 (251)

Optic nerve head blood flow autoregulation during isometric exercise in primary open‐angle glaucoma assessed by laser speckle flowgraphy

Acta Ophthalmologica, EarlyView.
Abstract Purpose To assess optic nerve head blood flow (ONHBF) autoregulation in patients with early‐ to moderate‐stage primary open‐angle glaucoma (POAG) and age‐ and sex‐matched healthy controls using laser speckle flowgraphy (LSFG) and isometric handgrip exercise.
Theresa Lindner, Viktoria Pai, Patrick Janku, Nikolaus Hommer, Anton Hommer, Liudmyla Petric, Ulrich Graf, Leopold Schmetterer, Gerhard Garhöfer, Doreen Schmidl   +9 more
wiley   +1 more source

Keterkaitan Indikator Aktivitas Matahari Sunspot, F10,7) Dan Semburan Sinar X

, 2001
ABSTRAK Ada keterkaitan yang erat antara tiga parameter aktivitas matahari : bilangan sunspot (R), fluks 10,7 cm (F10,7), dan intensitas radiasi Soft X-ray (ISXR).
Suratno, Suprijatno Jasman
core  

Observed Joy’s Law of Bipolar Magnetic Region Tilts at Emergence Supports the Thin Flux Tube Model

The Astrophysical Journal Letters
Bipolar sunspots, or more generally, bipolar magnetic regions (BMRs), are the dynamic magnetic regions that appear on the solar surface and are central to solar activity. One striking feature of these regions is that they are often tilted with respect to
Anu Sreedevi, Bidya Binay Karak, Bibhuti Kumar Jha, Rambahadur Gupta, Dipankar Banerjee   +4 more
doaj   +1 more source

Impact of retinal break location on surgical outcomes in primary uncomplicated rhegmatogenous retinal detachment: Superior versus inferior breaks

Acta Ophthalmologica, EarlyView.
Abstract Purpose To compare the anatomical and functional outcomes of pars plana vitrectomy (PPV) for primary uncomplicated rhegmatogenous retinal detachment (RRD) with superior versus inferior retinal breaks. Methods This retrospective study included 675 eyes of 675 patients, of which 476 had exclusively superior breaks and 199 had at least one ...
Ioanna Dimakopoulou, Michael Georgopoulos, Philipp Toubia Scholz, Jakob Kraiger, Johannes Iby, Sam Hedo, Stefan Sacu, Georgios Mylonas   +7 more
wiley   +1 more source

A Bias-free Deep Learning Approach for Automated Sunspot Segmentation

The Astrophysical Journal
Solar activities significantly influence space weather and the Earth’s environment, necessitating accurate and efficient sunspot detection. This study explores deep learning methods to automate sunspot identification in solar satellite images, keeping ...
Jing Chen, Norbert G. Gyenge, Ye Jiang, Robertus Erdélyi, Jiajia Liu, Yimin Wang   +5 more
doaj   +1 more source

Statistical study of the equatorial F2 layer critical frequency at Ouagadougou during solar cycles 20, 21 and 22, using Legrand and Simon’s classification of geomagnetic activity

Journal of Space Weather and Space Climate, 2012
This paper presents the statistical analysis of the diurnal variations of the F layer at the equatorial station of Ouagadougou (Lat: 12.4° N; Long: 358.5° E; dip: 5.9°) from 1966 to 1998 (=> ~11 680 days).
Amory-Mazaudier Christine, Ouattara Frédéric   +1 more
doaj   +1 more source

Nearly doubled incidence of surgically treated primary rhegmatogenous retinal detachment in Southern Sweden, 2011–2025

Acta Ophthalmologica, EarlyView.
Abstract Purpose To determine the incidence of surgically treated primary rhegmatogenous retinal detachment (RRD) in Southern Sweden between 2011 and 2025, and to examine whether demographic change or risk factor trends account for any change in incidence.
Pernilla Rosenquist, Joakim Thylefors
wiley   +1 more source

Speculative attacks : unique sunspot equilibrium and transparency [PDF]

, 2005
Models with multiple equilibria are a popular way to explain currency attacks. Morris and Shin (1998) have shown that, in the context of those models, unique equilibria may prevail once noisy private information is introduced.
Illing, Gerhard, Heinemann, Frank
core  

Sunspot number recalibration: The ~1840–1920 anomaly in the observer normalization factors of the group sunspot number

Journal of Space Weather and Space Climate, 2017
We analyze the normalization factors (k′-factors) used to scale secondary observers to the Royal Greenwich Observatory (RGO) reference series of the Hoyt & Schatten (1998a, 1998b) group sunspot number (GSN).
Cliver Edward W.
doaj   +1 more source

Retinal capillary density in relation to diabetes duration and levels of glycaemia in young patients with type 1 diabetes

Acta Ophthalmologica, EarlyView.
Abstract Purpose To examine retinal capillary plexus characteristics and their correlation with diabetes duration and levels of glycaemia in young type 1 diabetes (T1D) patients. Methods Cross‐sectional analysis of baseline data from an observational, prospective cohort study of 69 patients with T1D aged 6–32 (mean 16) years in T1D duration subgroups ≤
Marie Elise Wistrup Torm, Jesper Johannesen, Jakob Lønborg Christensen, Vedrana Andersen Dahl, Javad Nouri Hajari, Oliver Niels Klefter, Michael Larsen   +6 more
wiley   +1 more source