Low work function cathode development Summary report
Low work function cathode configurations and nickel encapsulated powder for withstanding intensive ion bombardment
ION BOMBARDMENT↗
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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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Part III - The effects of thermal stresses on the aerobic and anaerobic work capacities of men Final scientific report
Effects of hyperthermia and hypothermia on aerobic and anaerobic work capacities of men
HYPOTHERMIA↗
Investigations of electron emission characteristics of low work function surfaces Final report, 27 Sep. 1964 - 28 Sep. 1966
Electron emission characteristics of low work function surfaces
WORK FUNCTION↗
Literature search of physical property data and of composite surface work function models Semiannual report, 1 May - 1 Nov. 1966
Literature search of physical property data and composite surface work function models
MATHEMATICAL MODEL↗
Evaluation of the effect of cold work on dispersion-strengthened nickel-base alloys Summary report, 13 Jun. - 13 Dec. 1966
Cold working effects on dispersion strengthened nickel alloys containing thorium dioxide
DISPERSION HARDENING↗
Investigations of electron emission characteristics of low work function surfaces Quarterly report, 28 Sep. - 27 Dec. 1966
Coadsorption of cesium and fluorine on tungsten, and analysis of mechanisms leading to decay of field emission current from low work function zirconium/oxygen coated tungsten emitter
OXYGEN↗
Chronology of work stoppages and related events KSC/NASA and AFETR, July 1965 - July 1967
Chronology of work stoppages and statistics on man-days lost by construction contractors at KSC/NASA and AFETR
WORK↗
The influence of a second-phase interface on the work hardening behavior of an aluminum-5 atomic percent silver alloy.
Second phase interface influence on work-hardening behavior of aluminum-5 atomic percent silver alloy, examining substructure development and flow stress behavior
ALUMINUM↗
An electron microscopy and X-ray study of the recovery on annealing of cold-worked, dispersion-strengthened alloys.
X-ray diffraction-Fourier series analysis and electron microscopy analysis of annealing effects on structural properties of cold worked dispersion-strengthened alloys
ELECTRON MICROSCOPY↗
Dissociation of heat production and heat loss in working men.
Heat metabolism in working men while isolated from environment by water-cooled suit and environmental chamber
OXYGEN CONSUMPTION↗
Improved surface ionization efficiency by high work function refractory metals and alloys.
Refractory metals and metal alloys analyzed regarding electron work function and threshold temperature for surface ionization in all-metal guard ring diode with directly heated wire
REFRACTORY METAL↗
The influence of CsF on the work function of a tungsten surface.
Impurity free CsF effect on work function of tungsten surface, discussing amount of impurities, type and control
WORK FUNCTION↗
Anisotropy of metal work functions measured by field emission and thermionic techniques.
Anisotropy of electronic metal work functions for zero and high electric fields perpendicular to surface measured by field emission and thermionic techniques
WORK FUNCTION↗
Cardiac output in man in rest and work during and after acclimatization to 3,800 M.
Cardiac output during rest and work determined via carbon dioxide method at 3800 m altitude
WORK-REST CYCLE↗
Effect of high altitude on maximal working capacity.
High altitude effect on work capacity, discussing bicycle ergometer test results on physiological response of human subjects
HIGH ALTITUDE BREATHING↗
Vacuum thermionic work functions and thermal stability of TaB sub 2, ZrC, Mo sub 2 C, MoSi sub 2, TaSi sub 2, and WSi sub 2.
Vacuum thermionic work function and thermal stability measurements on crystal surfaces, discussing results on carbides, diborides and disilicades
THERMIONIC EMISSION↗
Least-work analysis of the problem of shear lag in box beams
The distribution of stress in the cover sheets of thin-wall box beams is analyzed, with regard to the effect of shear deformation in the cover sheets, by the method of least work. Explicit results are obtained for a number of representative cases that show the influence of the following factors on the stress patterns. (1) Variation of stress in spanwise direction as given by elementary beam theory. (2) Value of a parameter called shear-lag aspect ratio which designates the product of span-width ratio of the beam and of the square root of the ratio of effective shear modulus and tensing modulus of the cover sheets. (3) Value of ratio of cover-sheet stiffness to side-web stiffness. (4) Variation of beam height in span direction. (5) Variation of beam width in span direction. (6) Variation of cover-sheet thickness in span direction. General conclusions are drawn from the results obtained. Among them the most important one appears to be the fact that the shear-lag effect depends primarily on the following tow quantities: (1) the value of the shear-lag aspect ratio. (2) the shape of the curve representing the product of the stress of elementary beam theory and of the cover-sheet thickness.
STRESS CALCULATIONS, LEAST-WORK↗
Beyond knowledge capture: creating useful work-centric systems
Once you have successfully captured knowledge, the challenge then becomes one of creating an affective way to use that knowledge. Two high knowledge content systems developed at the Jet Propulsion Laboratory are presented as examples of work-centric systems, where the primary value to the user is in the content.
knowledge management environment knowledge capture↗