Results 21 to 30 of about 1,175,457 (250)

Volcanic ash infrared signature: porous non-spherical ash particle shapes compared to homogeneous spherical ash particles [PDF]

Atmospheric Measurement Techniques, 2014
The reverse absorption technique is often used to detect volcanic ash clouds from thermal infrared satellite measurements. From these measurements effective particle radius and mass loading may be estimated using radiative transfer modelling.
A. Kylling, M. Kahnert, H. Lindqvist, T. Nousiainen   +3 more
doaj   +1 more source

Range of spherical equivalent power dispensed.

, 2022
Range of spherical equivalent power dispensed.
Frederick Afum Asare (12008835), Priya Morjaria (3913609)   +1 more
core   +1 more source

Predictors of Unwanted Prismatic Effect Among Bespectacled Symptomatic Ammetropes (Refractive Error Less Than 4D) With Displaced Optical Centre

Delhi Journal of Ophthalmology, 2018
Aim and objectives:- This study tries to estimate the relationship between alignment of spectacle, decentration, spherical equivalent and type of lens with induced prism in spectacles. Design:- Descriptive cross sectional study.
Babitha Valiyaveettil, Padma B. Prabhu, P.T. Asmin, Raju Kuzhippally Vallon   +3 more
doaj   +1 more source

Spherical equivalent distribution in UK Biobank cohort (N = 50,893).

, 2022
The distribution of the spherical equivalent (x-axis) in the samples; the number of participants for each spherical equivalent bin is given in the y-axis. (PNG)
Anthony M. Musolf (12759712), Mario Falchi (120130), Virginie J. M. Verhoeven (13844405), Alison Klein (709483), Jeremy A. Guggenheim (8667063), Omar A. Mahroo (13844402), Caroline C. W. Klaver (7252217), Jugnoo S. Rahi (7735868), Karina Patasova (13844399), Chris J. Hammond (7693748), Annechien E. G. Haarman (7252202), Joan E. Bailey-Wilson (9282573), Pirro G. Hysi (7634090), Priya Duggal (73718)   +13 more
core   +1 more source

Utility of orthokeratology contact lenses; efficacy of myopia correction and level of patient satisfaction in Iranian myopic/myope-astigmatic patients

Journal of Current Ophthalmology, 2015
Purpose: To investigate the medical profiles of patients referred to Iran Lens Clinic with myopic/myope-astigmatic refractive errors. Methods: Medical records of 182 patients (364 eyes) with myopic/myope-astigmatic refractive errors that underwent ...
Mohammad Taher Rajabi, Seyedeh Simindokht Hosseini, Zahra Ghorbani, Fereshteh Nobahari, Fatemeh Bazvand, Askar Doostdar, Parviz Zarrinbakhsh, Mohammad Bagher Rajabi   +7 more
doaj   +1 more source

Concepts of microdosimetry [PDF]

, 1975
This is the first part of an investigation of microdosimetric concepts relevant to numerical calculations. The definitions of the microdosimetric quantities are reviewed and formalized, and some additional conventions are adopted.
Kellerer, Albrecht M., Chmelevsky, D.
core   +1 more source

Plan with equivalent spherical volume.

, 2020
(A) Contribution parameters to define using algorithm TMR 10. (B) Calculation of equivalent spherical volume for target. (C) equivalent spherical target and phantom.
Simone Coutinho Cardoso (8283012), Antônio Afonso Ferreira De Salles (8283018), Luiz Fernando de Ávila (8283021), Daniela Piai Groppo (8283015), Luiz Antonio Ribeiro da Rosa (8283024), Crystian Wilian Chagas Saraiva (8283009)   +5 more
core   +1 more source

Comparison of Autorefraction and Photorefraction with and without Cycloplegia Using 1% Tropicamide in Preschool Children

Journal of Ophthalmology, 2019
Purpose. We aimed to investigate whether the accuracy of the Plusoptix A09 photorefractor in children with ametropia is enhanced by cycloplegia with 1% tropicamide. Methods. A total of 70 eyes (70 children) were retrospectively reviewed.
Ertuğrul Tan Yassa, Cihan Ünlü
doaj   +1 more source

Ratio of torus and equivalent power to refractive cylinder and spherical equivalent in phakic lenses – a Monte‐Carlo simulation study [PDF]

, 2021
Background: Spherical and astigmatic powers for phakic intraocular lenses are frequently calculated using fixed ratios of phakic lens refractive power to refractive spherical equivalent, and of phakic lens astigmatism to refractive cylinder.
Jens Schrecker, Timo Eppig, Schröder, Simon, Zoltán Nagy, Langenbucher, Achim, Schrecker, Jens, Nagy, Zoltán, Achim Langenbucher, Michael Schwemm, Simon Schröder, Alan Cayless, Nóra Szentmáry, Schwemm, Michael, Szentmáry, Nóra, Cayless, Alan, Eppig, Timo   +15 more
core   +1 more source

Compatibility of high-altitude aeromagnetic and satellite-altitude magnetic anomalies over Canada [PDF]

, 2002
Results from equivalent-source distributions derived jointly from high-altitude (average 4 km) aeromagnetic and Magsat-derived (average 400 km) magnetic anomalies over Canada indicate that long-wavelength components (500–2500 km) in these fields are ...
Ravat, D., Pilkington, M., Purucker, M., Whaler, K.; id_orcid, Sabaka, T.   +4 more
core   +1 more source