SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Measurement of fission products from Star Fish high-altitude nuclear explosion with recording gamma-ray spectrometer
Standard test procedures for initiators of explosive devices
Explosion hazards associated with hydrogen-oxygen system ignition at various pressures and fuel- oxidant ratios, solid and liquid state
Dynamic properties of explosion in medium consisting of condensed phase fuel particles dispersed in gaseous oxidizer
Mechanical and physical properties determined for explosive bonded refractory/austenitic metal combinations
Annotated abstracts of materials science technical memorandum - plastic, composite, explosive, lubricant, engineering, propellant, alloy, and heat carrying materials
Active lunar seismological experiment utilizing explosive charge source
Plasma thermodynamic properties under hydrostatic pressure and explosively increased hydrostatic pressure
Electrohydraulic, explosive, and other high energy rate forming processes compared to conventional methods denoting influence of strain rate on mechanical properties
Hydrogen and oxygen sensors to detect explosive forming gases leaking from liquid propellant systems
Wall vibrations and amplitude attenuations measured in tunnel and cavity formed by underground nuclear explosion
Analysis of data obtained from satellites concerning artificial radiation belt formed by July 9, 1962 high-altitude nuclear explosion
Measurement of plasma density generated by underwater explosions, noting modes of electrical discharge and shock front role
Computation of impact densities and velocity distribution of debris from lunar surface explosions
Influence of shock or stress events induced by underground nuclear explosions on low temperature thermoluminescence of halite
Structure and decay of artificial radiation belt produced by high altitude nuclear explosion
The beginning of the Phanerozoic saw two biological events that set the stage for all life that was to come: (a) the Cambrian Explosion (the appearance of most marine invertebrate phyla) and (b) the Great Ordovician Biodiversification Event (GOBE), the subsequent substantial accumulation of marine biodiversity. Here, we examine the current state of understanding of marine environments and ecosystems from the late Ediacaran through the Early Ordovician, which spans this biologically important interval. Through a compilation and review of the existing geochemical, mineralogical, sedimentological, and fossil records, we argue that this interval was one of sustained low and variable marine oxygen levels that both led to animal extinction and fostered biodiversification events throughout the Cambrian and Early Ordovician. Therefore, marine ecosystems of this interval existed on the edge—with enough oxygen to sustain them but with the perennial risk of environmental stressors that could overwhelm them.
Fundamental explosive testing was conducted by the NASA/MSFC Blast Team (N2L) to determine yields produced from cryogenic liquid mixtures of methane and oxygen for a range of oxygen-to-fuel ratios. The blast wave overpressure and high-speed video data were processed by the NASA led multi-agency data analysis team. This document serves to provide a summary of the optimized data analysis produced and the resulting conclusions regarding the yields achieved during this test program.