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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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DOE OSTI2018

Designing Denuclearization Regimes: Agreement, Declarations, Objectives, and Inspections

In this paper, the question is asked, how should a country plan a new denuclearization verification regime? Should it concentrate on accounting for fissile material, should it try to "verify" a declaration of the program's history, or,as some analysts have suggested, should it simply redirect the weapons scientists toward peaceful purposes after dismantling the weapons infrastructure and monitor their activity?

98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
DOE OSTI2019

System and method for inspecting parts using frequency response function

A system and method for the non-destructive testing of additively manufactured parts. An input mechanism excites with an excitation force (e.g., a vibration) an additive manufacturing build platform on which the part is located to induce a dynamic response in the part. An output mechanism (e.g., a non-contact transducer) senses the induced dynamic response in the part. A processor determines and examines the relationship between the response and excitation to identify an indication of a defect in the part, and communicates an alert if the indication is identified. The processor may compare the phase, magnitude, coherence, or time delay of the relationship to a reference relationship and/or may compare the modal frequency or the modal damping to a reference to identify a deviation greater than a pre-established threshold.

47 OTHER INSTRUMENTATION↗