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Negative Refraction and Left-handed electromagnetism in Microwave Photonic Crystals [PDF]
, 2004 We demonstrate negative refraction of microwaves in metallic photonic crystals. The spectral response of the photonic crystal, which manifests both positive and negative refraction, is in complete agreement with band-structure calculations and numerical ...
E. Cubukcu +9 more
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Folia Medica Indonesiana, 2021 Introduction: Management of low vision in pediatric patients with greater result can affect their quality of life than in adult low vision patients.. Retinopathy of Prematurity is the main cause of blindness in children.
Christina Aritonang
doaj +1 more source
RBF-Based Camera Model Based on a Ray Constraint to Compensate for Refraction Error
Sensors, 2023 A camera equipped with a transparent shield can be modeled using the pinhole camera model and residual error vectors defined by the difference between the estimated ray from the pinhole camera model and the actual three-dimensional (3D) point.
Jaehyun Kim +4 more
doaj +1 more source
Indian Journal of Ophthalmology, 2021 Purpose: To develop predictive models to identify cataract surgery patients who are more likely to benefit from refraction at a four-week postoperative exam. Methods: In this retrospective study, we used data of all 86,776 cataract surgeries performed in
Sachin Gupta +3 more
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Depth perception on fundus images using a single-channel stereomicroscopy
Journal of Innovative Optical Health Sciences, 2021 Typical fundus photography produces a two-dimensional image. This makes it difficult to observe the microvascular and neural abnormalities, because the depth of the image is missing. To provide depth appreciation, we develop a single-channel stereoscopic
Edalat Radfar +4 more
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Developing Flipped Classroom-based Mobile Learning Media to Teach Optical Physics
Scientiae Educatia: Jurnal Pendidikan Sains, 2020 The application of flipped classrooms-based M-learning media will make learning more planned and systematic. Therefore, students will be more enthusiastic and independent in the learning process. The study aims to design a flipped classrooms-based mobile
Setya Fery Widyastuti +1 more
doaj +1 more source
Ocular Refraction at Birth and Its Development During the First Year of Life in a Large Cohort of Babies in a Single Center in Northern Italy [PDF]
, 2020 The purpose of this study was to investigate refraction at birth and during the first year of life in a large cohort of babies born in a single center in Northern Italy.
Bartollino S. +7 more
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Taiwan Journal of Ophthalmology, 2020 PURPOSE: There is a need to understand the requirement for the post-mydriatic test (PMT) among adults for the final prescription of spectacles as this test increases the cost of eye care and causes inconvenience to the patient because of the additional ...
Nagarajan Theruveethi +2 more
doaj +1 more source
Study on the Polarization Pattern Induced by Wavy Water Surfaces
Remote Sensing, 2023 In nature, the wavy ocean surface is a common polarizer, which can change the polarization state of incident light by refraction and reflection and form a new polarization pattern different from the atmosphere.
Haoyuan Cheng +4 more
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Education Sciences, 2023 Spectroscopy is the basis of many applications in chemistry; however, the basic principles of light, light–matter interaction, and the operation of spectrophotometers are rarely present in chemistry curricula at the high-school level, or they are only ...
Maria Antonietta Carpentieri +3 more
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