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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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For several years we, at JPL, have been working on how to select safety measures for space missions in an optimal way. The main limitation on the measures that can be performed is, of course, cost.
In many modern communication applications there is a need for simple circularly polarized antennas for hemispherical coverage with good axial ratio or low value of cross polarization. We revisited the crooked wire antenna because of its simplicity. This paper presents results of our investigation on the crooked wire antennas and other elements.
With adaptive problem solving, we take a biologically-inspired approach to both stochastic optimization and search in order to enable a spacecraft to adapt its environment-specific bevahior in-situ.
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Quantum mechanical simulations of carrier transport in Si require an accurate model of the complicated Si bandstructure. Tight-binding models are an attractive method of choice since they bear the full electronic structure symmetry in them and they can discretize a realistic device on an atomic scale.
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We describe a genome compiler which complies s-expressions to machine code, resulting in significant speedup of individual evaluations over standard GP systems.
The problem of tuning trajectory determination models for interplanetary navigation is a complex task requiring an intensive search of multiple dynamical and nondynamical models that yield trajectory solutions with minimal errors.
The Nanoelectronic Modeling Tool (NEMO) is a general-purpose quantum device design and analysis tool based on a fundamental non-equilibrium electron transport theory.
In recent years, pressure to reduce the costs of interplanetary missions has led to a heighted emphasis on designing missions with shorter flight times, smaller launch vehicles, and simpler flight systems.
Material variations on an atomic scale enable the quantum mechanical functionality of devices such as resonant tunneling diodes (RTDs), quantum well infrared photodetectors (QWIPs), quantum well lasers, and heterostructure field effect transistors (HFETs).
Kelly Matzen of OXITEC speaks at the 9th Annual Genomics of Energy & Environment Meeting on March 20, 2014 in Walnut Creek, CA.
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