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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Deformation mechanism and load transfer in an in-situ NiTi–Nb composite
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Image-based Stokes flow modeling in bulk proppant packs and propped fractures under high loading stresses
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Tribology review of blended bulk polymers and their coatings for high-load bearing applications
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Impact of Ni and Mg Loadings on Dry Reforming Performance of Pt/Ceria-Zirconia Catalysts
The isolated effects of Ni and Mg on a series of Pt/Ce 0.6 Zr 0.4 O 2 (CZO) reforming catalysts were evaluated and used to formulate an improved catalyst with both Ni and Mg present. The dry reforming reaction results indicate that Ni enhances the CH 4 conversion at low temperatures while Mg improves the H 2 :CO ratio and stability, but requires high temperatures to reach similar conversions. The detection of coke (5.5 X 10 -4 g/g cat •h) over the 2.7Ni-CZO sample led to the examination of the 2.7Ni-0.50Mg-CZO sample. The catalyst activity results and the absence of coke formation over the 2.7Ni-0.50Mg-CZO sample confirmed that both Ni and Mg are needed to obtain a balance between catalyst activity and stability. The catalysts tested yielded low temperature activity with 10 % CH 4 conversions at temperature <500 °C. Furthermore, this work provides key insights into the proper design of low temperature reforming catalysts.
Effect of Co Loading on the Activity and Selectivity of PtCo Aqueous Phase Reforming Catalysts
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Instabilities of Jammed Packings of Frictionless Spheres Under Load
In this work, we consider the contribution to the density of vibrational states and the distribution of energy barrier heights of incipient instabilities in a glass modeled by a jammed packing of spheres. On approaching an instability, the frequency of a normal mode and the height of the energy barrier to cross into a new ground state both vanish. These instabilities produce a contribution to the density of vibrational states that scales as ω 3 at low frequencies ω, and a contribution to the distribution of energy barriers ΔH that scales as ΔH -1/3 at low barrier heights.
Evaluation of power flow control for an all-electric warship power system with pulsed load applications.
Abstract not provided.
Optimizing Distributed Load Balancing for Workloads with Time-Varying Imbalance.
Abstract not provided.
Exploration of Fine-Grained Parallelism for Load Balancing Eager K-truss on GPU and CPU.
Abstract not provided.