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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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Description of Continuum Spectrum States of Light Nuclei in the Shell Model
The SS-HORSE method is applied to describe the scattering of nucleons by light nuclei based on calculations within the No-Core Shell Model with JISP16 and Daejeon16 NN interactions. The resonant states in {sup 5}He, {sup 5}Li, and {sup 7}He nuclei have been investigated. The SS-HORSE method generalized to the case of the democratic decay is also applied to study a four-neutron system (tetraneutron). The calculations with JISP16 and Daejeon16 and with chiral NN interactions indicate the existence of a rather narrow low-energy tetraneutron resonance.
Oak Ridge National Laboratory Support of Non-light Water Reactor Technologies: Capabilities Assessment for NRC Near-term Implementation Action Plans for Non-light Water Reactors
The Oak Ridge National Laboratory (ORNL) has a rich history of support for light water reactor (LWR) and non-LWR technologies. The ORNL history involves operation of 13 reactors at ORNL including the graphite reactor dating back to World War II, two aqueous homogeneous reactors, two molten salt reactors (MSRs), a fast-burst health physics reactor, and seven LWRs. Operation of the High Flux Isotope Reactor (HFIR) has been ongoing since 1965. Expertise exists amongst the ORNL staff to provide non-LWR training; support evaluation of non-LWR licensing and safety issues; perform modeling and simulation using advanced computational tools; run laboratory experiments using equipment such as the liquid salt component test facility; and perform in-depth fuel performance and thermal-hydraulic technology reviews using a vast suite of computer codes and tools. Summaries of this expertise are included in this paper.
Neural ODEs for Light Curves: Classifying and Approximating Light Curves
Neural differential equations are a increasingly popular neural network framework. Neural ODEs remove discretizations that traditional layer based neural networks necessarily have. Neural ODEs are a continuous depth model that can trade precision and speed. I show that neural ODEs can estimate light curve time series using LSST Kaggle data.
Changes in Lighting to achieve 30% or 40% less than ANSI/ASHRAE/IES Standard 90.1-2019 Lighting Power Density Values
A white paper on the changes in lighting inputs to achieve a 30% or 40% reduction below ANSI/ASHRAE/IES Standard 90.1-2019.
Chemical Crystallography at the Advanced Light Source
Chemical crystallography at synchrotrons was pioneered at the Daresbury SRS station 9.8. The chemical crystallography beamlines at the Advanced Light Source seek to follow that example, with orders of magnitude more flux than a lab source, and various in situ experiments. This article thus attempts to answer why a chemist would require synchrotron X-rays, to describe the techniques available at the ALS chemical crystallography beamlines, and place the current facilities in a historical context.
Point-source light sensor circuit is insensitive to background light
Circuit incorporating a bisynchronous demodulator for an electro-optical star-tracking sensor provides a signal proportional to star intensity without interference from background light in the field of view. The system works best on a sharply focused star image and requires a 50 percent duty cycle.
Responses of heterotrophic cultures of Chlorella vulgaris Beyerinck to darkness and light. II - Action spectrum for and mechanism of the light requirement for heterotrophic growth.
Photoillumination effect on growth rate of Chlorella vulgaris, discussing action spectrum and mechanism of light requirement for heterotrophic growth
Environmental lighting and neuroendocrine function - Relationship between spectrum of light source and gonadal growth
Broad spectrum light sources effects on mammalian endocrine apparatus development and function determined in rats
The light airplane : modern theoretical aerodynamics as applied to light airplane design with a series of charts
T.M. 311 gave a short outline of modern theoretical aerodynamics as applied to light airplane design. This discussion may have been somewhat obscure to the nontechnical reader. A series of charts or curves should serve to clear up such obscurity as well as to more definitely emphasize those quantities most important for each flight characteristic.
Fiber optic probes for laser light scattering: Ground based evaluation for micgrogravity flight experimentation. Integrated coherent imaging fiber optic systems for laser light scattering and other applications
The research work presented in this report has established a new class of backscatter fiber optics probes for remote dynamic light scattering capability over a range of scattering angles from 94 degrees to 175 degrees. The fiber optic probes provide remote access to scattering systems, and can be utilized in either a noninvasive or invasive configuration. The fiber optics create an interference free data channel to inaccessible and harsh environments. Results from several studies of concentrated suspension, microemulsions, and protein systems are presented. The second part of the report describes the development of a new technology of wavefront processing within the optical fiber, that is, integrated fiber optics. Results have been very encouraging and the technology promises to have significant impact on the development of fiber optic sensors in a variety of fields ranging from environmental monitoring to optical recording, from biomedical sensing to photolithography.
Analysis and Design of Phase Change Thermal Control for Light Emitting Diode (LED) Spacesuit Helmet Lights
LED Helmet Extravehicular Activity Helmet Interchangeable Portable (LEHIP) lights for the Extravehicular Mobility Unit (EMU) have been built and tested and are currently being used on the International Space Station. A design is presented of the passive thermal control system consisting of a chamber filled with aluminum foam and wax. A thermal math model of LEHIP was built and correlated by test to show that the thermal design maintains electronic components within hot and cold limits for a 7 hour spacewalk in the most extreme EVA average environments, and do not pose a hazard to the crew or to components of the EMU.
ULTRA-HIGH PERFORMANCE LED LIGHTING SHEETS EMPLOYING PHOTOLUMINESCENT LIGHT GUIDES
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Toward Smart and Ultra-efficient Solid-State Lighting
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Light Trapping in Ultrathin Monocrystalline Silicon Solar Cells
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Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at s NN = 5.02 TeV
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Coherent Exciton Dynamics in Supramolecular Light-Harvesting Nanotubes Revealed by Ultrafast Quantum Process Tomography
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