Results 121 to 130 of about 142,277 (291)

Recent Stirling Conversion Technology Developments and Operational Measurements at NASA Glenn Research Center [PDF]

In support of the Advanced Stirling Radioisotope Generator (ASRG) project and other potential applications, NASA Glenn Research Center (GRC) has initiated convertor technology development efforts in the areas of acoustic emission, electromagnetic field ...
Oriti, Salvatore M., Schifer, Nicholas A.   +1 more
core   +1 more source

Lateral Profile of Doping Concentration Extracted From the C‐V Characteristics in Self‐Aligned Top‐Gate Coplanar InGaZnO Thin‐Film Transistors

Advanced Electronic Materials, EarlyView.
For self‐aligned top‐gate amorphous InGaZnO thin‐film transistors (TFTs), a capacitance‐voltage‐based extraction technique that directly reconstructs a lateral doping profile and key parameters is proposed. The extracted profiles are validated by direct comparison with the transfer‐length method.
Seung Joo Myoung, Chang Il Ryoo, Jingyu Park, Dong Hyeop Shin, Su Han Noh, Sae Him Jung, Soohong Eo, Wonjung Kim, Sung Jun Yun, Jae Moon Soh, Yoo Seok Park, Changwook Kim, Dong Myong Kim, Sung‐Jin Choi, Yoon Jung Lee, Ickhyun Song, Dae Hwan Kim   +16 more
wiley   +1 more source

Optimal control set expansion method for three‐phase voltage source converter with slip window selection and online parameter modification

IET Power Electronics
Finite control set model predictive control (FCS‐MPC) has been widely used in the control of three‐phase voltage source converter (VSC), but its control performance declines sharply at low sampling frequencies.
Linqiang Hu, Wanjun Lei, Zhongxiu Xiao, Xing Sun   +3 more
doaj   +1 more source

Piezoelectric Energy Harvesting Solutions: A Review. [PDF]

Sensors (Basel), 2020
Covaci C, Gontean A.
europepmc   +1 more source

Testing of the Advanced Stirling Radioisotope Generator Engineering Unit at NASA Glenn Research Center [PDF]

The Advanced Stirling Radioisotope Generator (ASRG) is a high-efficiency generator being developed for potential use on a Discovery 12 space mission. Lockheed Martin designed and fabricated the ASRG Engineering Unit (EU) under contract to the Department ...
Lewandowski, Edward J.
core   +1 more source

Research Progress and Applications of Non‐Carrier‐Injection Electroluminescence

Advanced Electronic Materials, EarlyView.
Non‐carrier‐injection electroluminescence (NCI‐EL) uses AC fields and displacement currents to trigger light from internal charge reservoirs, enabling minimalist emitters with remotely coupled terminals. This review maps shared mechanisms across organics, GaN, quantum dots, and TMDCs, compares planar, interdigital, single‐terminal, and coaxial designs,
Wei Huang, Jianbi Le, Rong Chen, Zhixian Lin, Xiongtu Zhou, Yongai Zhang, Chaoxing Wu   +6 more
wiley   +1 more source

Enhanced Secondary Control for Power/Current Sharing in DC Microgrids Considering Communication‐Links Failures and Current and Voltage‐Controlled Converters

IET Renewable Power Generation
The stable operation of DC microgrids requires robust secondary control strategies capable of ensuring accurate power sharing and bus voltage regulation, even under adverse conditions.
Juliana C. Neves, Rafaela D. Silveira, Sergio A. O. da Silva, Leonardo P. Sampaio, Sebastián de J. Manrique Machado   +4 more
doaj   +1 more source

Overview of Stirling Technology Research at NASA Glenn Research Center [PDF]

Stirling Radioisotope Power Systems (RPS) are under development to provide power on future space science missions where robotic spacecraft will orbit, flyby, land or rove using less than a quarter of the plutonium the currently available RPS uses to ...
Metscher, Jonathan F., Schifer, Nicholas A., Williams, Zachary D., Wilson, Scott D.   +3 more
core   +1 more source

Acoustic Impedance‐Tailored High‐Performance Ultrasound‐Driven Triboelectric Nanogenerators

Advanced Energy Materials, EarlyView.
An acoustic impedance–mismatched triboelectric nanogenerator is presented for efficient ultrasound energy harvesting in implantable medical devices. Concave and convex membrane patterning induces controlled acoustic impedance mismatch, which boosts output by ∼200% and ensures stable operation over 100 million cycles and six weeks in vivo, highlighting ...
Young‐Jun Kim, Youngwook Chung, Joon‐Ha Hwang, Jang‐Mook Jeong, Bosung Kim, Donghyun Kang, Byung‐Ok Choi, Hong‐Joon Yoon, Sang‐Woo Kim   +8 more
wiley   +1 more source

A CC/VC‐based power tracking method for photovoltaic inverter operated in voltage control mode

IET Power Electronics
The active power control of photovoltaic (PV) inverters without energy storage can flatten the fluctuating power and support the voltage amplitude and frequency of the grid.
ZhenXiong Wang, Yingjie Peng, Hao Yi, Wei Zhang, Jingting Wu, Qiru Li, Fang Zhuo   +6 more
doaj   +1 more source