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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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Curve fitting complex X-ray photoelectron spectra of graphite-supported copper nanoparticles using informed line shapes
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Large-eddy simulations of the NACA23012 airfoil with laser-scanned ice shapes
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The Third Coiled Coil Domain of Atg11 Is Required for Shaping Mitophagy Initiation Sites
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Pulse shape discrimination of photons and neutrons in the energy range of 0.1 – 2 GeV with the KOTO un-doped CsI calorimeter
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Electrostatic Control of Shape Selection and Nanoscale Structure in Chiral Molecular Assemblies
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Improved slit-shaped microseparator and its integration with a microreactor for modular biomanufacturing
Pictures of microseparator parts and integrated microreactor and microseparator to produce high purity streams containing platform biomass-derived chemicals.
Nonperturbative renormalization of asymmetric staple-shaped operators in twisted mass lattice QCD
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Learning Shapes on Image Sampled Points with Dynamic Graph CNNs
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How nitrogen and oxygen shape SRF cavity performance
Nitrogen and oxygen-based surface treatments have revolutionized the performance of superconducting radiofrequency (SRF) cavities, enabling them to reach higher gradients and lower losses. However, the exact mechanisms by which these treatments improve cavity performance remain largely unknown. This work provides new insights into the role of nitrogen and oxygen in SRF cavity performance by using time-of-flight secondary ion mass spectrometry (TOF-SIMS) to precisely quantify the concentrations and depth profiles of these impurities within niobium cutouts. We correlate these impurity profiles with detailed cavity performance measurements, including surface resistance and quality factor, and compare our findings with predictions from BCS theory. The results demonstrate that while both nitrogen and oxygen enhance performance, ten times more oxygen is required to achieve the same reduction in BCS resistance as interstitial nitrogen. We present a potential model in which the observed variation arises from nitrogen's greater effectiveness in trapping hydrogen, thus reducing the formation of niobium hydrides and enhancing superconducting gap.
Influence of uniaxial compression on the shape memory behavior of vitrimer composite embedded with tension‐programmed unidirectional shape memory polymer fibers
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Effects of particle shape on the shape of extinction and polarization bands in grains
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The Effects of Piston-head Shape, Cylinder-head Shape, and Exhaust Restriction, on the Performance of a Piston-ported Two-stroke Cylinder
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Comparison of Mechanical Properties of Flat Sheets, Molded Shapes, and Postformed Shapes of Cotton-fabric Phenolic Laminates
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