Results 81 to 90 of about 169,085 (298)
A 99%-efficiency GaN converter for 6.78 MHz magnetic resonant wireless power transfer system
The Journal of Engineering, 2014 The authors developed a high-efficiency gallium-nitride (GaN) Class-E converter for a 6.78 MHz magnetic resonant wireless power transfer system. A negative-bias gate driver circuit made it possible to use a depletion mode GaN high-electron-mobility ...
Yoshiyuki Akuzawa +3 more
doaj +1 more source
A quantum-dot heat engine operating close to the thermodynamic efficiency limits
, 2018 Cyclical heat engines are a paradigm of classical thermodynamics, but are impractical for miniaturization because they rely on moving parts. A more recent concept is particle-exchange (PE) heat engines, which uses energy filtering to control a thermally ...
Burke, Adam M., +9 more
core +1 more source
Chemoselective Sequential Polymerization: An Approach Toward Mixed Plastic Waste Recycling
Advanced Functional Materials, EarlyView.Inspired by biological protein metabolism, this study demonstrates the closed‐loop recycling of mixed synthetic polymers via ring‐closing depolymerization followed by a chemoselective sequential polymerizations process. The approach recovers pure polymers from mixed feedstocks, even in multilayer formats, highlighting a promising strategy to overcome a
Gadi Slor +5 more
wiley +1 more source
IET Power ElectronicsIn environments with numerous converters, there is a need for highly efficient. The LLC resonant converter is a good candidate for microgrid applications, as it features low switching losses and a wide voltage regulation range.
Andre de Souza Leone +4 more
doaj +1 more source
The Journal of Engineering, 2019 This article presents an extended backstepping control method to reduce the grid-side current harmonics caused by grid voltage distortion. A dynamic model considering the grid voltage as an external disturbance is derived in the stationary reference ...
Hang Yin +3 more
doaj +1 more source
Method and apparatus for analyzing material properties using reflected ultrasound [PDF]
, 1991 A method and apparatus which assesses the mechanical properties of a material by launching an ultrasound signal at the material while varying the angle of incidence and analyzing the amplitude of the ultrasound wave reflected by the material.
Antich, Pietro P. +2 more
core +1 more source
Advanced Functional Materials, EarlyView.This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari +4 more
wiley +1 more source
Advanced Functional Materials, EarlyView.In this strategy, a conductive nano‐probe is employed to induce nanoscale phase transitions and map the nanoscale conductivity and trap density of GST films. By utilizing the contrasting properties of phase‐change states, nano‐resonators are fabricated that exhibit plasmonic conduction and dramatically different transport characteristics.
Sunwoo Bang +4 more
wiley +1 more source
Supporting Technology at GRC to Mitigate Risk as Stirling Power Conversion Transitions to Flight [PDF]
Stirling power conversion technology has been reaching more advanced levels of maturity during its development for space power applications. The current effort is in support of the Advanced Stirling Radioisotope Generator (ASRG), which is being developed
Schreiber, Jeffrey G. +2 more
core +1 more source
UV Plasmonic Metamaterial from Vertical Non-Conventional Nanoantennas [PDF]
, 2016 Boston, Massachusetts, November 29-December 4, 2015Metallic nanoantennas have been used as nanophotonic detectors of infrared and visible radiation [1] [2].
Alda, J. +3 more
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