Results 111 to 120 of about 3,439,333 (263)

Solar sunspot cycle analysis

, 2021
A 93-year long cycle seems to be lurking in the solar sunspot activity data.
openaire   +1 more source

Bilateral simultaneous cataract surgery and intraocular lens implantation in an adult female chimpanzee (Pan troglodytes) inducing monovision

Veterinary Ophthalmology, Volume 28, Issue 2, Page 457-464, March 2025.
Abstract Background Cataract is the major cause of visual impairment in humans. Phacoemulsification with intraocular lens (IOL) implantation is the standard technique for cataract treatment with a high success rate. In a few cases, the surgical cataract procedure and lens implantation have been applied in non‐human primates.
F. Notting, Y. Cheng, M. Marinkovic, H. van Bolhuis, I. Notting   +4 more
wiley   +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

Investigation of HZE particle fluxes as a space radiation hazard for future Mars missions

Heliyon, 2019
Manned Mars missions planned in the near future of very low solar activity period and hence higher than acceptable radiation doses due mainly to the Galactic Cosmic Rays (GCR), would require special techniques and technological development for ...
Nagaraja Kamsali, S.C. Chakravarty, Praveen Kumar Basuvaraj   +2 more
doaj   +1 more source

Solar activity prediction of sunspot numbers (verification). Predicted solar radio flux; predicted geomagnetic indices Ap and Kp [PDF]

Efforts to further verify a previously reported technique for predicting monthly sunspot numbers over a period of years (1979 to 1989) involved the application of the technique over the period for the maximum epoch of solar cycle 19. Results obtained are
Newman, S. R.
core   +1 more source

North South Asymmetry of Different Solar Activity Features During Solar Cycle 23

, 2009
A study on North South (NS) asymmetry of different solar activity features (DSAF) such as solar proton events, solar active prominences, H alpha flare index, soft X ray flares, monthly mean sunspot area and monthly mean sunspot number were carried out ...
Ataç, Ataç, Bai, Ballester, Bell, Bimal Pande, Carbonell, Chang, Choudhuri, Gao, Goel, Haber, Hathaway, Howard, Joshi, Joshi, Joshi, Joshi, Kavita Pandey, Li, Li, Li, Li, Maunder, Navin Chandra Joshi, Neeraj Singh Bankoti, Oliver, Pulkkinen, Roy, Seema Pande, Temmer, Temmer, Verma, Verma, Verma, Verma, Vizoso, Vizoso, Waldmeier, Zaatri, Zhao   +40 more
core   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +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

Periodicities in sunspot activity during solar cycle 23

, 2006
The data of sunspot numbers, sunspot areas and solar flare index during cycle 23 are analyzed to investigate the intermediate-term periodicities. Power spectral analysis has been performed separately for the data of the whole disk, northern and southern ...
Bai, Bai, Bai, Bai, Ballester, Ballester, Ballester, Bhuwan Joshi, Bogart, Carbonell, Carbonell, Horne, Ichimoto, Joshi, Joshi, Kile, Krivova, Lean, Lean, Lomb, Oliver, Oliver, Oliver, P. K. Manoharan, P. Pant, Richardson, Rieger, Scargle, Özgüç, Özgüç   +29 more
core   +1 more source

First Results of a New Inversion Tool for Thermospheric Neutral Mass Density Computations During Severe Geomagnetic Storms

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract In Low Earth Orbit (LEO), atmospheric drag is the dominant source of trajectory prediction error below approximately 700 km altitude, primarily due to inaccuracies in thermospheric density models. This work presents a method for temporally deconvolving Energy Dissipation Rates (EDRs) to produce single‐satellite density estimates, which can be ...
S. Mutschler, M. Pilinski, E. Zesta, D. M. Oliveira, K. Delano, K. Garcia‐Sage, W. K. Tobiska   +6 more
wiley   +1 more source