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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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Heuristic optimization of group structure using Physics-Based Fitness Approximation
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Physical anomaly detection and identification using Cerenkov radiation
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Influence of soil chemical and physical characteristics on willow yield in Connecticut
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Environmental Calcium Controls Alternate Physical States of the Caulobacter Surface Layer
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Dehydration-induced physical strains of cellulose microfibrils in plant cell walls
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Augmented Physics-Informed Neural Networks (APINNs): A gating network-based soft domain decomposition methodology
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Enrichment of rare earth elements from coal and coal by-products by physical separations
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Chemical and physical controls on the transformation of amorphous calcium carbonate into crystalline CaCO3 polymorphs
Calcite and other crystalline polymorphs of CaCO3 can form by pathways involving amorphous calcium carbonate (ACC). Apparent inconsistencies in the literature indicate the relationships between ACC composition, local conditions, and the subsequent crystalline polymorphs are not yet established. This experimental study quantifies the control of solution composition on the transformation of ACC into crystalline polymorphs in the presence of magnesium. Using a mixed flow reactor to control solution chemistry, ACC was synthesized with variable Mg contents by tuning input pH, Mg/Ca, and total carbonate concentration. ACC products were allowed to transform within the output suspension under stirred or quiescent conditions while characterizing the evolving solutions and solids. As the ACC transforms into a crystalline phase, the solutions record a polymorph-specific evolution of pH and Mg/Ca.
Geologic CO2 Storage Optimization under Geomechanical Risk Using Coupled-Physics Models
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