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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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The scientific inferential relationships between statistical estimation, decision theory, and modern filter theory.
Scientific inferential relationships between statistical estimation, decision theory and modern filter theory
Process reduces pore diameters to produce superior filters
Porous metal structure with very small pore diameters is produced by heating the structure in oxygen for an oxidized surface layer, cooling it, and heating it in hydrogen to deoxidize the oxidized portion. Such structures are superior catalyst beds and filters.
Ultrasonic cleaning restores depth-type filters
Cleaning process uses a nonionic surfactant and ultrasonic agitation to restore depth-type fibrous filters to maximum effectiveness.
Exposure Value /EV/ system expanded to include filter factors and transmittance
Application of the exposure value system requires that the system be extended to high brightness level and expanded to include filter factors. A minimum of four photographic factors are involved in the evaluation of an exposure which, when determined from tables of 1-stop interval, could introduce noticeable error.
Statistical Filtering of Space Navigation Measurements
Statistical filtering of space navigation measurements
Effect of reduced computer precision on a midcourse navigation and guidance system using optimal filtering and linear prediction
Reduced computer precision effect on midcourse navigation and guidance system using optimal filtering and linear prediction
Electronic filter discriminates between true and false reflections
Electronic filtering system discriminates between true corneal and false reflections, solving the problem of spurious reflections of the CRT light in newly designed oculometer.
Midcourse navigation using statistical filter theory, a manual theodolite, and symbolic computer control
Midcourse navigation using statistical filter theory, manual theodolite, and symbolic computer control applied to manned spacecraft
Calculation of control gains with filters for rigid body motion of a space vehicle
Equations for calculating control gains with filters for rigid body motion of space vehicle
Investigations in space communications theory, including topics related to random processes, filtering, telemetry Semiannual status report, 1 Oct. 1966 - 31 Mar. 1967
Random processes, filtering, and telemetry problems in space communications theory
Filter Wedge Spectrometer for Field Use
Spectrometers, utilizing interference filter wedges, for field use, especially in hostile environments
Flow and filtration performance of wire cloth filter media.
Mathematical models of flow and filtration performance of wire cloth filter media in series and parallel configuration
Digital filter suppresses effects of nonstatistical noise bursts on multichannel scaler digital averaging systems
Digital filter suppresses the effects of nonstatistical noise bursts on data averaged over multichannel scaler. Interposed between the sampled channels and the digital averaging system, it uses binary logic circuitry to compare the number of counts per channel with the average number of counts per channel.
Electron beam selectively seals porous metal filters
Electron beam welding selectively seals the outer surfaces of porous metal filters and impedances used in fluid flow systems. The outer surface can be sealed by melting a thin outer layer of the porous material with an electron beam so that the melted material fills all surface pores.
Coolants with selective optical filtering characteristics for ruby laser applications
Coolant-filtering medium developed consists of a solution of copper sulfate in a 4-1 volumetric mixture of ethanol and methanol. This solution should be a useful addition to ruby laser systems, particularily in large pulse or Q switching applications.
Design study report for infrared filter wedge spectrometer instrument for Nimbus D satellite Quarterly report, 6 Apr. - 1 Jul. 1967
Design criteria for Nimbus D infrared filter wedge spectrometer
Evaluation of optical thin-film filters with a digital computer and display
Multilayer, dielectric, thin film optical filter evaluation using cathode ray tube display device