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Full-Text Articles in Engineering
Local Structure And Dynamic Studies Of Mixed Ch4-Co2 Gas Hydrates Via Computational Simulation And Neutron Scattering, Bernadette Rita Cladek
Local Structure And Dynamic Studies Of Mixed Ch4-Co2 Gas Hydrates Via Computational Simulation And Neutron Scattering, Bernadette Rita Cladek
Doctoral Dissertations
Permeated throughout the ocean floor and arctic permafrost, natural gas hydrates contain an estimated 3000 trillion cubic meters, over three times that of traditional shale deposits, of CH4 that is accessible for extraction. Gas hydrates are a crystal structure in which water molecules form a cage network, the host, through hydrogen bonds while trapping a guest molecule such as CH4 in the cavities. These compounds form naturally where the appropriate low temperature and high pressure conditions occur. A promising and tested method of methane recovery is through exchange with CO2, which energetically takes place of the …
Characterization Of A Digital Holography Diagnostic For In Situ Erosion Measurement Of Plasma-Facing Components In Fusion Devices, Cary Dean Smith
Characterization Of A Digital Holography Diagnostic For In Situ Erosion Measurement Of Plasma-Facing Components In Fusion Devices, Cary Dean Smith
Doctoral Dissertations
Fusion energy devices, particularly tokamaks, face the challenge of interior surface damage occurring over time from the heat flux of the high-energy plasma they generate. The ability to monitor the rate of surface modification is therefore imperative, but to date no proven technique exists for real-time erosion measurement of planar regions of interest on plasma-facing components in fusion devices. In order to fill this diagnostic gap, a digital holography system has been established at ORNL [Oak Ridge National Laboratory] for the purpose of measuring the erosion effects of plasma-material interaction in situ.
The diagnostic has been designed with the …
Exploration Of Thin Films For Neuromorphic, Electrofluidic, And Magneto-Plasmonic Applications, Walker L. Boldman
Exploration Of Thin Films For Neuromorphic, Electrofluidic, And Magneto-Plasmonic Applications, Walker L. Boldman
Doctoral Dissertations
Due to the limit in computing power arising from the Von Neumann bottleneck, computational devices are being developed that mimic neuro-biological processing in the brain by correlating the device characteristics with the synaptic weight of neurons. We demonstrate a platform that combines ionic liquid gating of amorphous indium gallium zinc oxide (aIGZO) thin film transistors and electrowetting for programmable placement/connectivity of the of the ionic liquid. In this platform, both short term potentiation (STP) and long-term potentiation (LTP) are realized via electrostatic and electrochemical doping of the aIGZO, respectively, and pulsed bias measurements are demonstrated for low power considerations. Using …