UNT College of Engineering - 233 Matching Results

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Metastability-assisted fatigue behavior in a friction stir processed dual-phase high entropy alloy

Description: This article explores metastability-based high entropy alloy design which can open a new strategic path for designing high strength materials. However, high strength is always coupled with poor damage tolerance under cyclic loading conditions (fatigue). To overcome this drawback, the articles presents grain-refined Fe42Mn28Cr15Co10Si5 exhibiting significantly high fatigue strength as compared with leading transformation induced plasticity steels upon friction stir processing.
Date: unknown
Creator: Liu, K; Nene, S. S.; Frank, M.; Sinha, S. & Mishra, R. S.
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Fabrication of wide-IF 200–300GHz superconductor–insulator–superconductor mixers with suspended metal beam leads formed on silicon-on-insulator

Description: This article reports on a fabrication process that uses silicon-oninsulator (SOI) substrates and micromachining techniques to form wide-IF superconductor–insulator–superconductor (SIS) mixer devices that have suspended metal beam leads for rf grounding. Aside from a description of the fabrication process, electrical measurements of these Nb/Al–AlNₓ /Nb trilayer devices will also be presented.
Date: October 7, 2004
Creator: Kaul, Anupama; Bumble, Bruce; Lee, Karen A.; LeDuc, Henry G.; Rice, Frank & Zmuidzinas, Jonas
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open access

Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling

Description: Article on the characterization of noise in a flux qubit using macroscopic resonant tunneling between the two lowest lying states of a bistable rf SQUID. Analysis of these results indicates that the dominant source of low energy flux noise in this device is a quantum mechanical environment in thermal equilibrium.
Date: September 10, 2008
Creator: Harris, R.; Johnson, M. W.; Han, S.; Berkley, A. J.; Johansson, J.; Bunyk, P. et al.
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open access

Geometrical dependence of the low-frequency noise in superconducting flux qubits

Description: Article reporting on a study of a series of 85 devices of vary design using a general method for directly measuring the low-frequency flux noise (below 10 Hz) in compound Josephson-junction superconducting flux qubits. The results support the hypothesis that local impurities in the vicinity of the qubit wiring are a key source of low-frequency flux noise in superconducting devices.
Date: February 26, 2009
Creator: Lanting, T.; Berkley, A. J.; Bumble, B.; Bunyk, P.; Fung, A.; Johansson, J. et al.
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Interrogating vertically oriented carbon nanofibers with nanomanipulation for nanoelectromechanical switching applications

Description: Article demonstrates electrostatic switching in vertically oriented carbon nanofibers synthesized on refractory metallic nitride substrates, where pull-in voltages Vpi ranged from 10 to 40 V. A finite element model was also developed to determine a theoretical Vpi and results were compared to experiment.
Date: August 31, 2009
Creator: Kaul, Anupama; Khan, Abdur R.; Bagge, Leif; Megerian, Krikor G.; LeDuc, Henry G. & Epp, Larry
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open access

Synchronization of multiple coupled rf-SQUID flux qubits

Description: Article demonstrating a practical strategy for synchronizing the properties of compound Josephson junction (CJJ) radio frequency monitored superconducting quantum interference device (rf-SQUID) qubits on a multi-qubit chip.
Date: December 21, 2009
Creator: Harris, R.; Brito, F.; Berkley, A. J.; Johansson, J.; Johnson, M. W.; Lanting, T. et al.
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Plasma Treated Multi-Walled Carbon Nanotubes (MWCNTs) for Epoxy Nanocomposites

Description: This article describes the depositing of plasma nanocoating of allylamine on the surfaces of multi-walled carbon nanotubes to provide desirable functionalities and thus to tailor the surface characteristics of multi-walled carbon nanotubes for improved dispersion and interfacial adhesion in epoxy matrices.
Date: December 19, 2011
Creator: Ritts, Andrew C.; Yu, Qingsong; Li, Hao; Lombardo, Stephen J.; Han, Xu; Xia, Zhenhai et al.
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open access

Carbon Nanomaterials for Optical Absorber Applications

Description: Article describing optical absorbers based on vertically aligned multi-walled carbon nanotubes (MWCNTs), synthesized using electric-field assisted growth that show an ultra-low reflectance, 100X lower compared to the benchmark, a diffuse metal black - Au-black - from wavelength λ ~ 350 nm – 2500 nm.
Date: December 28, 2011
Creator: Kaul, Anupama; Coles, James; Megerian, Krikor; Eastwood, Michael; Green, Robert; Pagano, Thomas et al.
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