Results 91 to 100 of about 257,877 (269)
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
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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.
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Negative refraction and plano-concave lens focusing in one-dimensional photonic crystals
, 2006 Negative refraction is demonstrated in one-dimensional (1D) dielectric photonic crystals (PCs) at microwave frequencies. Focusing by plano-concave lens made of 1D PC due to negative refraction is also demonstrated.
Huang, Y. +3 more
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Advanced Functional Materials, EarlyView.A food‐grade cooling composite made from starch and recycled eggshell powder offers a scalable, ultra‐low‐cost solution for passive daytime radiative cooling. Easily prepared using basic kitchen tools, this material empowers communities, even in areas with limited infrastructure, to stay cooler during worsening summer heat waves.
Qimeng Song +3 more
wiley +1 more source
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
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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
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Inverse Prism based on Temporal Discontinuity and Spatial Dispersion
, 2017 We introduce the concept of the inverse prism as the dual of the conventional prism and deduce from this duality an implementation of it based on temporal discontinuity and spatial dispersion provided by anisotropy.
Akbarzadeh, Alireza +2 more
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Advanced Functional Materials, EarlyView.Guided by the golden ratio, a class of aperiodic architected metamaterials is introduced to address the intrinsic trade‐off between strength and toughness. By unifying local geometric heterogeneity with global order, the golden‐ratio‐guided aperiodic architecture promotes spatial delocalization of damage tolerence regions, leading to more tortuous ...
Junjie Deng +9 more
wiley +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
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