Results 91 to 100 of about 75,411 (347)

Waveguides, bends and Y-junctions with improved transmission and bandwidth in hexagon-type SOI photonic crystal slabs [PDF]

, 2005
This paper presents novel ways of implementing waveguide components in photonic crystal slabs based on silicon-on-insulator (SOI). The integration platform we consider consists of hexa¬gonal holes arranged in a triangular lattice (‘hexagon-type’ photonic
Bostan, Cazimir G., Driessen, Alfred, Kelderman, Henry, Ridder, René M. de   +3 more
core   +2 more sources

Contact Lens with Moiré Patterns for High‐Precision Eye Tracking

Advanced Functional Materials, EarlyView.
This work presents a passive contact lens for high‐precision eye tracking, integrating a microscopic moiré grating label. The parallax‐induced shift of macroscopic moiré patterns enables angle measurement with 0.28° precision using a standard camera under ambient light.
Ilia M. Fradkin, Roman V. Kirtaev, Mikhail S. Mironov, Dmitriy V. Grudinin, Alexander A. Marchenko, Marina M. Chugunova, Valentin R. Solovei, Alexander V. Syuy, Andrey A. Vyshnevyy, Ilya P. Radko, Aleksey V. Arsenin, Valentyn S. Volkov   +11 more
wiley   +1 more source

Infinite slabs and other weird plane symmetric space-times with constant positive density

, 2007
We present the exact solution of Einstein's equation corresponding to a static and plane symmetric distribution of matter with constant positive density located below $z=0$.
A.H. Taub, A.H. Taub, H. Stephani, I.S. Gradshteyn, J. Novotný, J. Novotný, R.E. Gamboa Saraví, R.E. Gamboa Saraví, Ricardo E. Gamboa Saraví   +8 more
core   +1 more source

Flat slab strengthening techniques against punching-shear

Engineering Structures, 2019
Abstract Over the years, the flat slab system has become a popular form of construction in many countries, particularly for multi-storey buildings such as offices or carparks. Nowadays, a considerable number of flat slab buildings requires strengthening against punching. Reasons are several, like design or construction errors, poor quality materials,
Massimo Lapi, António Pinho Ramos, Maurizio Orlando   +2 more
openaire   +3 more sources

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Dynamic Disproportionate Collapse in Flat-Slab Structures

Journal of Performance of Constructed Facilities, 2015
AbstractDisproportionate collapse of structures can lead to catastrophic economic loss and casualties, and thus, it is of utmost concern to mitigate the risks of such events. Flat-slab structures are much more vulnerable to disproportionate collapse than moment-frame structures as there are no beams to redistribute the loads initially resisted by the ...
Qian, Kai, Li, Bing
openaire   +2 more sources

Geometrically‐Screened, Sterically‐Hindered Additive for Wide‐Temperature Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
A molecular‑engineering strategy combining steric hindrance tuning with geometric optimization identifies cellobiose as an ideal additive for aqueous zinc‑ion batteries, enabling stable Zn deposition across a wide temperature range from −30 to 50 °C. Abstract Aqueous zinc‐ion batteries (AZIBs) are emerging as a highly promising alternative to lithium ...
Sida Zhang, Shengyang Huang, Weigen Chen, Zuyang Hu, Dong Hyun Min, Jun Su Kim, Hao Fu, Young Soo Yun, Won‐Chul Cho, Byung‐Hyun Kim, Baoyu Li, Chengchao Li, Jingyu Sun, Ho Seok Park   +13 more
wiley   +1 more source

Punching strength of reinforced concrete flat slabs without shear reinforcement

Revista IBRACON de Estruturas e Materiais
Punching strength is a critical point in the design of flat slabs and due to the lack of a theoretical method capable of explaining this phenomenon, empirical formulations presented by codes of practice are still the most used method to check the bearing
P. V. P. Sacramento, M. P. Ferreira, D. R. C. Oliveira, G. S. S. A. Melo   +3 more
doaj   +1 more source

Dual‐Atom Dopants Activated Ruthenium Single‐Atom Alloy Boosting Hydrogen Evolution Electrocatalysis in Proton Exchange Membrane Water Electrolyzer

Advanced Functional Materials, EarlyView.
Ni1‐Bi1 dual‐atom dopants are achieved for activating Ru lattices without blocking noble atoms. This model exhibits an ultralow overpotential of 11.4 mV and superb stability at 10 mA cm−2 toward hydrogen evolution reaction, enabling a proton exchange membrane water electrolyzer that needs only 2.233 V to reach 3.0 A cm−2 and operates stably at 1.0 A cm−
Shuiping Luo, Zhichao Yang, Xinyi Cai, Peiling Hu, Lei Xie, Junhao Qiu, Wen Chen, Tianou He, Yong Li, Tangting Li, Yuehan Li, Hong Zhu, Fenghao Jiang, Ke Liu, Jinliang Zhu, Shao‐Qing Liu, Xian‐Zhu Fu, Jing‐Li Luo   +17 more
wiley   +1 more source

Punching of reinforced concrete flat slabs with holes and shear reinforcement

REM: International Engineering Journal
Punching shear is a possible type of failure that occurs in reinforced concrete flat slabs, which can develop with an ultimate load below flexural capacity.
Jales Almeida Silva, Marília Gonçalves Marques, Leandro Mouta Trautwein, Ronaldo Barros Gomes, Gilson Natal Guimarães   +4 more
doaj   +1 more source