19,662 research outputs found
On the structure of thin4He films on solid hydrogen
We have investigated the adsorption of4He onto a quench-condensed H2 film by means of surface state electrons. Oscillations in the surface state electron conductivity clearly reveal the layerwise character of the adsorption. At temperatures below 2K we have observed an anomaly in the conductivity around the completion of the first monolayer. This new feature is interpreted as an indication of a liquid-to-solid phase transition in the first layer
White primer permits a corrosion-resistant coating of minimum weight
White primer for coating 2219 aluminum alloy supplies a base for a top coating of enamel. A formulation of pigments and vehicle results in a primer with high corrosion resistance and minimum film thickness
Structure formation by cosmic strings with a cosmological constant
Final published version.Comment: 4 Page
Development of corrosion inhibiting white primer final report, 26 jun. - 30 nov. 1964
Corrosion resisting white prime
Testing and evaluation of solid lubricants for gas bearings
The testing and results of testing solid film lubricants for gas lubricated bearing applications are reported. The tests simulated operational hazards of tilting pad gas bearings. The presence of a low coefficient of friction and the endurance of the solid film lubricant were the criteria for judging superior performance. All solid lubricants tested were applied to a plasma sprayed chrome oxide surface. Molybdenum disulfide and graphite fluoride were the solid lubricants tested; other test parameters included the method of application of the solid lubricant and the surface finish of the plasma sprayed coating. In general, the application of a solid film lubricant was found to significantly improve the coefficient of friction of the rubbing surfaces
On the singular values and eigenvalues of the FoxâLi and related operators
The FoxâLi operator is a convolution operator over a finite
interval with a special highly oscillatory kernel. It plays an important
role in laser engineering. However, the mathematical analysis of its spectrum
is still rather incomplete. In this expository paper we survey part
of the state of the art, and our emphasis is on showing how standard
WienerâHopf theory can be used to obtain insight into the behaviour of
the singular values of the FoxâLi operator. In addition, several approximations
to the spectrum of the FoxâLi operator are discussed and results
on the singular values and eigenvalues of certain related operators are
derived
Solutions to Cosmological Problems with Energy Conservation and Varying c, G and Lambda
The flatness and cosmological constant problems are solved with varying speed
of light c, gravitational coupling strength G and cosmological parameter
Lambda, by explicitly assuming energy conservation of observed matter. The
present solution to the flatness problem is the same as the previous solution
in which energy conservation was absent.Comment: 5 pages, Replaced with LaTex file with minor change
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