Results 141 to 150 of about 3,521 (274)

Update on Extended Operation of Stirling Convertors in Thermal Vacuum at NASA Glenn Research Center [PDF]

open access: yes
The U.S. Department of Energy (DOE), Lockheed Martin Space Systems (LMSS), Infinia Corporation, and NASA Glenn Research Center (GRC) have been developing a Stirling Radioisotope Generator (SRG) for use as a power system on space science missions.
Oriti, Salvatore M.
core   +1 more source

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

open access: yes
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.   +1 more
core   +1 more source

Light‐Induced Entropy for Secure Vision

open access: yesAdvanced Materials, EarlyView.
This work realized a ternary true random number generator by exploiting stochastic traps emerging within multiple junction interfaces, and quantitatively validated the generation of high‐quality random numbers. Furthermore, it successfully demonstrated diverse applications, including AI‐resilient image security, thereby providing a valuable guide for ...
Juhyung Seo   +9 more
wiley   +1 more source

Data‐driven Buck converter model identification method with missing outputs

open access: yesIET Control Theory & Applications
A data‐driven Buck converter model identification method is proposed to deal with missing (incomplete) outputs, which is robust to the data length and percentage of missing data.
Jie Hou   +3 more
doaj   +1 more source

Lunar Surface Stirling Power Systems Using Isotope Heat Sources [PDF]

open access: yes
For many years, NASA has used the decay of plutonium-238 (Pu-238) (in the form of the General Purpose Heat Source (GPHS)) as a heat source for Radioisotope Thermoelectric Generators (RTGs), which have provided electrical power for many NASA missions ...
Penswick, L. Barry   +2 more
core   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

open access: yesAdvanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

Development of NASA's Small Fission Power System for Science and Human Exploration [PDF]

open access: yes
Exploration of our solar system has brought many exciting challenges to our nations scientific and engineering community over the past several decades.
Bowman, Cheryl L.   +6 more
core   +2 more sources

Long-Lived Venus Lander Conceptual Design: How To Keep It Cool [PDF]

open access: yes, 2009
Surprisingly little is known about Venus, our neighboring sister planet in the solar system, due to the challenges of operating in its extremely hot, corrosive, and dense environment.
Bruder, Geoffrey A.   +3 more
core   +1 more source

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

open access: yesAdvanced Materials, EarlyView.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho   +3 more
wiley   +1 more source

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