Results 111 to 120 of about 2,864,935 (371)

Design and Development of Multi-mode Control System for Beam Pumping Unit

Shiyou jixie, 2018
In order to deal with the complicated and variable working conditions in the production process of the pumping unit, a multi-mode control system of the beam pumping unit is designed.
Ren Xuhu, Su Jiannan, Li Xu, Li Dewen, Sun Xiao, Ai Jie   +5 more
doaj  

Optical Gain in AlGaN Quantum Wells: Impact of Higher Energy States

IEEE Photonics Journal
Simulations of optical gain in aluminum gallium nitride (AlGaN) quantum wells are extended to the high charge carrier density regime required for achieving gain at 275 nm for UV laser diodes.
Sebastian Kolle, Friedhard Romer, Giulia Cardinali, Alexander Schulz, Norman Susilo, Daniel Hauer Vidal, Tim Wernicke, Michael Kneissl, Bernd Witzigmann   +8 more
doaj   +1 more source

Electrically pumped silicon waveguide light sources

Optics Express, 2011
We report simulations of electrically pumped waveguide emitters in which the emissive layer contains silicon nanoclusters and erbium ions. Plasmonic coupling to metallic or semi-metallic overlayers provides enhancement of the radiative rate of erbium ions, enabling high quantum efficiency emission.
Jayatilleka, H, Nasrollahy-Shiraz, A, Kenyon, AJ   +2 more
openaire   +3 more sources

Additive Manufacturing of NiTi Shape Memory Alloys for Elastocaloric Applications: A Review

Advanced Functional Materials, EarlyView.
Additive manufacturing enables complex NiTi architectures that overcome key limitations in elastocaloric refrigeration, including poor heat transfer and high mechanical work input. This review surveys recent advances in LPBF‐ and DED‐fabricated NiTi shape memory alloys for elastocaloric applications, highlighting process–structure–performance ...
Ignatius Andre Setiawan, Mohammad Mehrali, Jaka Tušek, Shiva Mohajerani, Xiebin Wang, Dermot Brabazon, Mohammad Elahinia, Mehrshad Mehrpouya   +7 more
wiley   +1 more source

Realizing efficient topological temporal pumping in electrical circuits

Physical Review Research
Quantized adiabatic transport can occur when a system is slowly modulated over time. In most realizations, however, the efficiency of such transport is reduced by unwanted dissipation, back-scattering, and nonadiabatic effects.
Alexander Stegmaier, Hauke Brand, Stefan Imhof, Alexander Fritzsche, Tobias Helbig, Tobias Hofmann, Igor Boettcher, Martin Greiter, Ching Hua Lee, Gaurav Bahl, Alexander Szameit, Tobias Kießling, Ronny Thomale, Lavi K. Upreti   +13 more
doaj   +1 more source

Methods to determine pumped irrigation-water withdrawals from the Snake River between Upper Salmon Falls and Swan Falls Dams, Idaho, using electrical power data, 1990-95 [PDF]

, 1999
Molly A. Maupin
openalex   +1 more source

Shaping of Biohybrid Functional Living Materials

Advanced Functional Materials, EarlyView.
This work demonstrates a strategy for shaping living mycelium into functional materials by directing its natural growth. Nanoparticles armor hyphae, micron‐scale particles entangle within the network, and printed hydrogel architectures steer expansion, creating defined geometries.
Sarah Schyck, Mark Ablonczy, Sourav Patranabish, Kunal Masania   +3 more
wiley   +1 more source

Laser enhancements for Lunar Laser Ranging at 532 nm

Results in Physics, 2016
This article exposes how we improved (by more than a factor of four) the green Lunar Laser Ranging instrumental sensitivity of the French telemetric station of the “Observatoire de la Côte d’Azur” in 2012.
G. Martinot-Lagarde, M. Aimar, D. Albanèse, C. Courde, P. Exertier, A. Fienga, H. Mariey, G. Métris, R. Rigard-Cerison, E. Samain, J.-M. Torre, H. Viot   +11 more
doaj   +1 more source

Fabrication of Pyridinic Nitrogen‐Functionalized Carbon Cloth for High‐Performance Iron‐Chromium Flow Batteries

Advanced Functional Materials, EarlyView.
The carbon cloth electrode with targeted pyridinic nitrogen doping, achieved via urea pyrolysis, effectively modulates the adsorption of Cr(II) species and enhances electron transfer, leading to significantly improved kinetics of the Cr(II)/Cr(III) reaction. The material demonstrates a high discharge capacity of 689.3 mAh and an energy efficiency of 72.
Jinfeng Yi, Senwei Zeng, Runfa Zhao, Guangfu Wu, Zhi Liu, Tianhang Zhou, Chunming Xu, Jia Guo, Quan Xu, Yingchun Niu   +9 more
wiley   +1 more source

Energy–exergy and entropy generation analysis of a PVT-TEG module using a sinusoidal channel combined with jet-impingement cooling

Case Studies in Thermal Engineering
This study investigates the thermo-electrical performance and entropy generation of a hybrid PVT-TEG system cooled by a Jet Impingement Module (JIM) across four channel geometries and Re numbers (400–1600).
Hatem Gasmi, Khalil Hajlaoui, Ali M. Mohsen, As'ad Alizadeh, Mujtaba A. Flayyih, Mohamed Shaban, Walid Aich, Karim Kriaa   +7 more
doaj   +1 more source