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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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Data demodulator for automatic sync acquisition provides an automatic means for obtaining initial word and bit synchronization in a pulse-code-modulated/phase-shift-keyed digital communications system.
Center-tap push-pull transformer with toroidal core helically wound with a single coaxial cable creates a high frequency wideband transformer. This transformer has a high-turn ratio, a high coupling coefficient, and a flat broadband response.
Memory circuit maintains the signal voltage at the output of an analog signal amplifier when the input signal is interrupted or removed. The circuit uses MOSFET /Metal Oxide Semiconductor Field Effect Transistor/ devices as voltage-controlled switches, triggered by an external voltage-sensing device.
NASA space biology program - exobiology, environmental and behavioral biology, molecular biology and instrumentation, flight programs, and manned space flight
Communications satellite development and technology, and review of United States objectives
Optimization techniques in computing minimum-fuel multistage trajectories for space missions
Systems compatability and testing for Ariel satellite
Computational mathematics, perturbed orbit three-body problem, and periodic trajectories solutions through computer methods
Reliability engineering for Saturn launch vehicles
Space astronomy developments in X-ray, gamma-ray, ultraviolet, infrared, and low-frequency radio spectra
Improvements in space vehicle stage checkout, structural nondestructive testing, and electronic component testing within quality control program
Manufacturing research in support of Saturn V - time-temperature as common denominator in welding, pink ruby laser for drilling and welding, and magnetic-field tools
Research on thermal space environment, computer programs for thermal control, emissivity, space effects on thermal control coatings, infrared physics, and thermal flight experiments
Space flight posture of U.S. at completion of AES program and alternate approaches for further lunar exploration and exploitation
First half of Gemini program noting design, prelaunch operations, astronaut training, EVA, ETC
Lamb-wave sample orientation technique minimizes the interference from standing waves in continuous wave ultrasonic television imaging techniques used with thin metallic samples. The sample under investigation is oriented such that the wave incident upon it is not normal, but slightly angled.
Series of mathematical relationships predicts compact densities of spherical shapes in a cylinder as a function of particle dimension, and compact density of angular shapes as a function of particle shape and absolute size.