Localized vibration modes of defect pairs in silicon
Absorption bands and localized vibrational modes of silicon doped with boron compounds containing phosphorus, arsenic, antimony, or lithium
Allred, W.↗
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Localized vibrational modes of lithium and lithium-defect pairs in silicon Final report, 1 Jul. 1967 - 30 Sep. 1968
Localized vibrational modes of lithium and lithium-defect pairs in silicon
Spitzer, W. G.↗
Localized vibrational modes of Li and P impurities in germanium.
IR absorption bands due to localized vibrational modes of lithium and P impurities in germanium at liquid-nitrogen temperature
Cosand, A. E.↗
Visible and near-infrared emittance of ablation chars and carbon.
Visible and near IR spectral reflectance and emittance at high temperature of ablation chars, carbon and graphite
Spitzer, C. R.↗
Thermal instabilities limiting power dissipation in transistors.
Second breakdown and other thermal instabilities analyzed by heat flow equation, obtaining stability criteria predicting reduced power dissipation for transistor at low currents
Spitzer, S. M.↗
The effects of dielectric overcoating on electromigration in aluminum interconnections.
Dielectric overcoating effects on electromigration Al interconnections, showing dependence on thickness and surface passivation
Schwartz, S.↗
Hyperbola-generator for location of aperiodic events
Plotting device, when used in conjunction with three or more detectors and local receiver and recorder, can quickly pinpoint location of any aperiodic event. Operation requires minimal training and is readily adapted to the field. Mechanical error in device prototype is less than or equal to 3 percent.
Paucker, H. R.↗
High resolution measurements in space astronomy and the requirements for diffraction limited optics
High resolution measurements and diffraction limited optics of large space telescope
Spitzer, L., Jr.↗
A brief review of the state of the art and some recent results on electromigration in integrated circuit aluminum metallization.
Dielectric overcoatings effect on Al interconnections electromigration in IC metallization, noting longer intervals between failures
Schwartz, S.↗
Spectral and integrated emittance of ablation chars and carbon
Ablation chars, carbon and graphite spectral emittance and reflectance as function of wavelength and temperature, noting applications to atmospheric entry heat shielding
Spitzer, C. R.↗
Simulator model specification for the augmentor wing jet STOL research aircraft
The configuration and simulation studies of a C-8A (De Havilland Buffalo) aircraft are described. The modifications to STOL configuration consisted of augmentor-wing jet flaps, blown and drooped ailerons, and leading edge slats. The total simulator model includes a number of component parts for producing realistic visual, aural, tactile, vestibular, and kinesthetic cues for the pilot to assess the predicted behavior of the real airplane.
Rumsey, P. C.↗
A design support simulation of the augmentor wing jet STOL research aircraft
The modification of a C-8A (De Havilland Buffalo) aircraft to a STOL configuration is discussed. The modification consisted of the installation of an augmentor-wing jet flap system. System design requirements were investigated for the lateral and directional flight control systems, the lateral and directional axes stability augmentation systems, the engine and Pegasus nozzle control systems, and the hydraulic systems. Operational techniques for STOL landings, control of engine failures, and pilot techniques for improving engine-out go-around performance were examined. Design changes have been identified to correct deficiencies in areas of the airplane control sytems and to improve the airplane flying qualities.
Rumsey, P. C.↗
Predicted flight characteristics of the augmentor wing jet STOL research aircraft
An existing deHavilland C-8A airplane has been modified into an augmentor wing flight test vehicle. Research objectives are to verify the augmentor flap concept and to produce data for STOL airworthiness criteria. The Modified C-8A provides the means for jet-STOL flight research down to a 60 knot approach speed. The airplane has a high thrust-to-weight ratio, high-lift flap system, vectored thrust, powerful flight controls, and lateral-directional stability augmentation system. Normal performance and handling qualities are expected to be satisfactory. Analysis and piloted simulator results indicate that stability and control characteristics in conventional flight are rated satisfactory. Handling qualities in the STOL regime are also generally satisfactory, although pilot workload is high about the longitudinal axis.
Spitzer, R. E.↗
Random gravitational encounters and the evolution of spherical systems. III - Halo.
The accumulation of stars in the halo of a spherical stellar system, together with the escape of stars from the system, result from stellar encounters within a dense central core. The resultant halo structure is studied both analytically and numerically for an isolated system. On the assumption that conditions in the central core remain constant with time, a simple steady-state solution is obtained for the outermost halo, or 'fringe', defined as the region from which stars may escape after a few additional orbits through the central core of the system. In this steady-state solution the density in phase space, obtained from a simple integral equation for the fringe region, is found to vary nearly linearly with the total energy of a star per unit mass for energies which are less than the energy of escape.
Spitzer, L., Jr.↗
Use of the flight simulator in the design of a STOL research aircraft.
Piloted simulator tests on the NASA-Ames Flight Simulator for Advanced Aircraft motion base played a major role in guiding the design of the Modified C-8A 'Buffalo' augmentor wing jet flap STOL research airplane. Design results are presented for the flight control systems, lateral-directional SAS, hydraulic systems, and engine and thrust vector controls. Emphasis is given to lateral control characteristics on STOL landing approach, engine-out control and recovery techniques in the powered-lift regime, and operational flight procedures which affected airplane design.
Spitzer, R. E.↗
Exposure interlock for oscilloscope cameras
An exposure interlock has been developed for oscilloscope cameras which cuts off ambient light from the oscilloscope screen before the shutter of the camera is tripped. A flap is provided which may be selectively positioned to an open position which enables viewing of the oscilloscope screen and a closed position which cuts off the oscilloscope screen from view and simultaneously cuts off ambient light from the oscilloscope screen. A mechanical interlock is provided between the flap to be activated to its closed position before the camera shutter is tripped, thereby preventing overexposure of the film.
Spitzer, C. R.↗
Spectrophotometric results from the Copernicus satellite. I - Instrumentation and performance.
The Princeton telescope-spectrometer on the OAO spacecraft Copernicus scans stellar spectra with a resolution of about 0.05 A between 950 and 1450 A, and twice this in first order between 1650 and 3000 A. The pointing during several minutes is steady within .02 sec, and the measured photometric precision in the shorter wavelength range is limited only by the statistics of photon counts, with 14-sec counts of about 1000 on an unreddened B1 star, m(v) = 5.0, at 1100 A. In the 1650-3000 A wavelength range, phototube noise resulting from cosmic rays makes observations difficult on stars fainter than m(v) = 3.0.
Rogerson, J. B.↗
Spectrophotometric results from the Copernicus satellite. II - Composition of interstellar clouds.
A survey of selected spectral regions in five reddened stars is described. A curve-of-growth analysis of abundances indicates that the ratios of Mg, P, Cl, and Mn to hydrogen are less than in the sun by factors of about 4 to 10. Several of the other elements also are depleted in some of the stars.
Morton, D. C.↗