Insights into the physical processes controlling correlations between snow distribution and terrain properties
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Brian T. Anderson↗
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Results for “processes control processes”
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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Test and inspection for process control of monolithic circuits Final report, 25 Aug. - 25 Nov. 1966
Fabrication quality control of monolithic microcircuits
MICROCIRCUIT↗
Liquid rocket combustion - An aerodynamically controlled process.
Liquid rocket propellant combustion processes covering liquid phase mixing, vaporization, spray formation, atomization, gas-phase mixing and chemical reaction
PROPELLANT COMBUSTION↗
Methods of measurement for semiconductor materials, process control, and devices Quarterly report, 1 Jan. - 31 Mar. 1969
Electrical resistivity, carrier lifetime, and electrical inhomogeneities in semiconductor devices
Bullis, W. M.↗
Methods of measurement for semiconductor materials, process control, and devices Quarterly report, 1 Apr. - 30 Jun. 1970
Measurement methods for semiconductor devices, materials, and production control
Baroody, A. J., Jr.↗
Study to development process controls for line certification on hybrid microcircuits Final report
Manufacturing quality controls for line certification of thin film and thick film hybrid microcircuits for NASA use
Keister, F.↗
An approach to real-time process control of semiconductor wire-bonding
Thermal probe using infrared-transparent optical fiber attached to tip of collet with resin to prevent movement during bonding is used to accurately measure temperature during wire bonding on semiconductors for use in large scale integrated circuits.
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Saturn S-2 quality assurance techniques, critical process control. Volume 7: Metallic materials
The special skills developed during the Saturn S-2 Program are documented to enable qualified personnel to carry out efficient operations in future S-2 production. Skills covered include: acceptance testing of fusion-welding equipment, weld operators and inspector certification, machine certification, preweld operations, and repair weld certification.
Ross, W. D., Jr.↗
Multi-processing control system for the SEL 840MP (MPCS/1) users guide. Volume 1: Programming guide
A programmer's manual is presented for the SEL 840MP multiprocessing control system MPCS. The topics discussed include task control; defining displays; MPCS calls for task control functions; MPCS calls and system interfaces for display functions; MPCS calls for input/output functions and services, file management, and utility services; and MPCS assembly language call sequence summary.
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Multi-processing control system for the SEL 840MP (MPCS/1) users guide. Volume 2: Operations guide
The generation and operational use of the SEL 840MP multiprocessing control system (MPCS) are considered. System initialization, job task table generation, the MPCS command language, display library generation, and system error summary are reviewed.
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Methods of measurement for semiconductor materials, process control, and devices
Significant accomplishments include development of a procedure to correct for the substantial differences of transistor delay time as measured with different instruments or with the same instrument at different frequencies; association of infrared response spectra of poor quality germanium gamma ray detectors with spectra of detectors fabricated from portions of a good crystal that had been degraded in known ways; and confirmation of the excellent quality and cosmetic appearance of ultrasonic bonds made with aluminum ribbon wire. Work is continuing on measurement of resistivity of semiconductor crystals; study of gold-doped silicon, development of the infrared response technique; evaluation of wire bonds and die attachment; and measurement of thermal properties of semiconductor devices, delay time and related carrier transport properties in junction devices, and noise properties of microwave diodes.
Bullis, W. M.↗
Recrystallization as a controlling process in the wear of some f.c.c. metals
Detailed examination of copper specimens after sliding against 440 C steel in liquid methane at speeds up to 25 m/s and loads of up to 2 kg showed the metal comprising the wear surface to possess a fine cell recrystallized structure. Wear proceeded by the plastic shearing of metal in this near surface region without the occurrence of visible metal transfer. A dynamic balance between the intense shear process at the surface and the nucleation of recrystallized grains was proposed to account for the behavior of the metal at the wear surface. Sliding wear experiments were also conducted on Ag, Cu-10% Al, Cu-10% Sn, Ni and Al. It was found that low wear and the absence of heavy metal transfer were associated with those metals observed to undergo recrystallization nucleation without prior recovery.
Bill, R. C.↗
Development of a process control computer device for the adaptation of flexible wind tunnel walls
In wind tunnel tests, the problems arise of determining the wall pressure distribution, calculating the wall contour, and controlling adjustment of the walls. This report shows how these problems have been solved for the high speed wind tunnel of the Technical University of Berlin.
Barg, J.↗
Atmospheric Ozone 1985. Assessment of Our Understanding of the Processes Controlling Its Present Distribution and Change, Volume 2: Global Ozone Research and Monitoring Project - Report No. 16
Observations and interpretation of oxygen, hydrogen, nitrogen, and halogenated species are discussed.
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Atmospheric Ozone 1985. Assessment of our understanding of the processes controlling its present distribution and change, volume 3
Topics addressed include: assessment models; model predictions of ozone changes; ozone and temperature trends; trace gas effects on climate; kinetics and photchemical data base; spectroscopic data base (infrared to microwave); instrument intercomparisons and assessments; and monthly mean distribution of ozone and temperature.
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Calculating Percent Gel For Process Control
Reaction state of thermosetting resin tracked to assure desired properties. Rate of gel determined as function of temperature by measuring time to gel of part of graphite fabric impregnated with Hexcel R120 (or equivalent) phenolic resin.
Webster, Charles Neal↗
Dynamic dielectric analysis for nondestructive cure monitoring and process control
Dynamic dielectric analysis (DDA) is an effective in situ NDE method that can monitor the reaction status in thermosets and the phase changes in thermoplastics, including slow reactions occuring late in the cure cycle and recrystallization during annealing. The effects of moisture and resin history on reaction rate can also be determined, as can ionic and dipolar contributions. The ionic mobility parameter is noted to be an excellent monitor of viscosity above the glass transition temperature. The ability of DDA to monitor cure rate variations in a thick section during autoclaving has been demonstrated.
Kranbuehl, D. E.↗
Artificial intelligence in process control: Knowledge base for the shuttle ECS model
The general operation of KATE, an artificial intelligence controller, is outlined. A shuttle environmental control system (ECS) demonstration system for KATE is explained. The knowledge base model for this system is derived. An experimental test procedure is given to verify parameters in the model.
Stiffler, A. Kent↗