Results 71 to 80 of about 658,110 (323)

Effect of Parental Myopia on Change in Refraction in Shanghai Preschoolers: A 1-Year Prospective Study

Frontiers in Pediatrics, 2022
BackgroundTo investigate the risk factors for change in refraction and refractive components in preschoolers.MethodsPreschool children aged 3–5 years old, from the junior and the middle grades of seven randomly selected kindergartens in Jia Ding District,
Yingyan Ma, Yingyan Ma, Senlin Lin, Jianfeng Zhu, Rong Zhao, Bo Zhang, Yao Yin, Yueqin Shao, Xiangui He, Xun Xu, Xun Xu, Haidong Zou, Haidong Zou   +12 more
doaj   +1 more source

Refraction of Electromagnetic Energy for Wave Packets Incident on a Negative Index Medium is Always Negative

, 2003
We analyze refraction of electromagnetic wave packets on passing from an isotropic positive to an isotropic negative refractive index medium. We definitively show that in all cases the energy is always refracted negatively.
A.A. Houck, C.G. Parazzoli, D.R. Smith, D.R. Smith, J. B. Sokoloff, J. Pacheco, Jr., J.A. Kong, J.A. Kong, P.M. Valanju, P.M. Valanju, R.A. Shelby, S. Sridhar, V.G. Veselago, W. T. Lu   +13 more
core   +1 more source

Numerical Model and Experimental Validation of Composite Metal Foam in Protecting Carbon Steel Against Puncture

Advanced Engineering Materials, EarlyView.
The puncture prevention and energy absorption performance of composite metal foam (CMF) are studied experimentally and numerically for hazardous materials transportation protection. The numerical model implementing air within the CMF (nonhomogeneous model using fluid cavity technique) predicts puncture more accurately compared to the homogeneous CMF ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

A Novel Vision-Based Pose Measurement Method Considering the Refraction of Light

Sensors, 2018
Nowadays, due to the advantages of non-contact and high-speed, vision-based pose measurements have been widely used for aircraft performance testing in a wind tunnel. However, usually glass ports are used to protect cameras against the high-speed airflow
Wei Liu, Xin Ma, Xiao Li, Yi Pan, Fuji Wang, Zhenyuan Jia   +5 more
doaj   +1 more source

Efficient and Scalable Radiative Cooling for Photovoltaics Using Solution‐Processable and Solar‐Transparent Mesoporous Nanoparticles

Advanced Functional Materials, EarlyView.
Graded refractive index (GRI) structures are prepared from the layer‐by‐layer spray coating of the mesoporous SiO2 nanoparticles, showing high solar transparency and thermal emissivity. Under outdoor conditions, after 50 days, the GRI‐coated photovoltaics show on average 6.65 ± 1.48 °C lower than that of the non‐coated references, maintaining 80.9 ± 8 ...
Heesuk Jung, Sung Yoon Min, Byungsoo Kang, Yongseok Yoo, Jihun Jang, Yeoun‐Woo Jang, Hyojeong Choi, Hyeong Won Lee, Swarup Biswas, Yongju Lee, Mansoo Choi, Phillip Lee, Min Seok Jang, Hyeok Kim, Shu Yang   +14 more
wiley   +1 more source

The effect of differential refraction on wave propagation in rotating pulsar magnetospheres

, 2004
Refraction of wave propagation in a corotating pulsar magnetospheric plasma is considered as a possible interpretation for observed asymmetric pulse profiles with multiple components. The pulsar radio emission produced inside the magnetosphere propagates
Arendt, Arons, Arons, Asseo, Barnard, Blandford, Blaskiewicz, D. Fussell, Daugherty, Fussell, Gangadhara, Gupta, Hibschman, Hirano, Kennett, Luo, Lyne, Lyubarskii, McKinnon, Melrose, Melrose, Melrose, Mikhailovskii, Petrova, Q. Luo, Rankin, Ruderman, Stinebring, Sturrock, Usov, Weinberg, Weltevrede, Zhang   +32 more
core   +2 more sources

Large negative lateral shifts due to negative refraction [PDF]

, 2011
When a thin structure in which negative refraction occurs (a metallo-dielectric or a photonic crystal) is illuminated by a beam, the reflected and transmitted beam can undergo a large negative lateral shift.
Antoine Moreau, Benedicto, Bretenaker, Emmanuel Centeno, Felbacq, Gralak, He, Jessica Benedicto, Kong, Krayzel, Laroche, Moreau, Moreau, Paul, Pillon, Rémi Pollès, Scalora, Shadrivov, Tamir, Wang   +19 more
core   +3 more sources

In‐Situ Growth of 2D MOFs as a Molecular Sieving Layer on SnS2 Nanoflakes for Realizing Ultraselective H2S Detection

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
The ultraselective H2S detection of the ZIF‐L/SnS2 heterostructure is demonstrated. The introduction of 2‐dimensional (2D) breathable ZIF‐L results in a substantial increase in H2S selectivity attributable to the molecular sieving effect, which impedes the permeation of gases with large kinetic diameters and high polarity.
Soo Min Lee, Yeong Jae Kim, Seon Ju Park, Woo Seok Cheon, Jaehyun Kim, Gi Baek Nam, Youngeun Kim, Ho Won Jang   +7 more
wiley   +1 more source

Associations between anthropometric indicators and refraction in school-age children during the post-COVID-19 era

Frontiers in Public Health, 2023
PurposeTo explore the associations between anthropometric indicators and refraction in school-aged children in the post-COVID-19 era.MethodsData were collected from 25,644 children aged 7 to 12 years in 48 elementary schools in Tianjin. The comprehensive
Wenzheng Du, Gang Ding, Xiying Guo, Kadiya Abudukeyimu, Yanzhu Wang, Lijun Wang, Xiaoli Qi, Yuxian Ning, Ning Hua, Linlin Song, Xue Li, Jing Li, Ying Zhang, Nan Wei, Xuehan Qian   +14 more
doaj   +1 more source

Nonlinear Negative Refraction by Difference Frequency Generation

, 2015
Negative refraction has attracted much interest for its promising capability in imaging applications. Such an effect can be implemented by negative index meta-materials, however, which are usually accompanied by high loss and demanding fabrication ...
Cao, Jianjun, Feng, Yaming, Shen, Dongyi, Wan, Wenjie   +3 more
core   +1 more source