Results 1 to 10 of about 342,556 (321)
Generalized laws of reflection and refraction from transformation optics
, 2012 Based on transformation optics, we introduce another set of generalized laws of reflection and refraction (differs from that of [Science 334, 333 (2011)]), through which a transformation media slab is derived as a meta-surface, producing anomalous ...
Chen, Huanyang, Xu, Yadong, Yao, Kan
core +1 more source
ON THE PROPAGATION OF RADIO EMISSION IN THE CROWN OF THE QUIET SUN WITH MAGNETIC FIELD
Odessa Astronomical Publications, 2013 There are searching for factors that influence on the brightness temperature distribution of the quiet Sun at decameter radio waves which may explain the ellipsoidal shape and other features in the radio brightness profile.
N. Tsvyk
doaj +1 more source
MODELING PROCESS OF DISTRIBUTION OF LIGHT FLOW IN THE ENVIRONMENT WITH DIFFUSING CENTERS
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2019 A mathematical model is developed for calculating parameters of light fluxes propagating through a light-scattering and absorbing medium. Single crystals of paratellurite and germanium with known optical parameters and densities of various absorbing and ...
S.S. Rybina, S.A. Tretyakov
doaj +1 more source
An exact Riemann solver based solution for regular shock refraction
, 2009 We study the classical problem of planar shock refraction at an oblique density discontinuity, separating two gases at rest. When the shock impinges on the density discontinuity, it refracts and in the hydrodynamical case 3 signals arise.
B. VAN DER HOLST +6 more
core +2 more sources
Impact of physical indicators on ocular development in preschool children
Frontiers in MedicineObjectiveUnderstanding the impact of early childhood physical growth on visual development is crucial, as this period marks a critical phase for foundational physical and ocular maturation. The aim of the current study was to investigate the associations
Xiangxiang Liu +9 more
doaj +1 more source
Does cycloplegia have a role in accurate estimation of refraction in highly myopic children
Delta Journal of Ophthalmology, 2018 Aim The aim of this study was to determine whether there is any difference between manifest and cycloplegic refractions in highly myopic children.
Ali A Ghali, Mohamed Altaher A AbdelAtty
doaj +1 more source
Predicted and measured boundary layer refraction for advanced turboprop propeller noise [PDF]
Currently, boundary layer refraction presents a limitation to the measurement of forward arc propeller noise measured on an acoustic plate in the NASA Lewis 8- by 6-Foot Supersonic Wind Tunnel.
Dittmar, James H., Krejsa, Eugene A.
core +1 more source
African Vision and Eye Health, 2009 Purpose: The optometry degree programme in South Africa currently includes a combination of both theoretical and clinical modules. The optometric skills required by graduates are often achieved by students’ involvement in clinical training at both in ...
R. Hansraj
doaj +1 more source
Conical diffraction and the dispersion surface of hyperbolic metamaterials
, 2014 Hyperbolic metamaterials are materials in which at least one principal dielectric constant is negative. We describe the refractive index surface, and the resulting refraction effects, for a biaxial hyperbolic metamaterial, with principal dielectric ...
Ballantine, K. E. +2 more
core +1 more source