Kruskal space and the uniformly accelerated frame.
Kruskal space in general relativity and uniform accelerated rigid rod in special relativity show striking formal similarities
SIMILARITY HYPOTHESIS↗
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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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Glassy materials investigated for nuclear reactor applications
Studies determine the feasibility of preparing fuel-bearing glasses and glasses bearing neutron-absorbing materials for use as crystalline fuel and control rods for reactors. Properties investigated were devitrification resistance, urania solubility, and density.
Lynch, E. D.↗
One hundred angstrom niobium wire
Composite of fine niobium wires in copper is used to study the size and proximity effects of a superconductor in a normal matrix. The niobium rod was drawn to a 100 angstrom diameter wire on a copper tubing.
Cline, H. E.↗
Modified sine bar device measures small angles with high accuracy
Modified sine bar device measures small angles with enough accuracy to calibrate precision optical autocollimators. The sine bar is a massive bar of steel supported by two cylindrical rods at one end and one at the other.
Thekaekara, M.↗
Consolidation and fabrication techniques for vanadium-20 w/o titanium /TV-20/
Tests of the mechanical properties, fuel compatibility, sodium corrosion and irradiation behavior were made for vanadium and vanadium alloy. Improved methods for consolidation and fabrication of bar, rod, sheet, and high-quality, small diameter, thin-wall tubing of vanadium-20 without titanium are reported.
Burt, W. R.↗
Analysis of notches and cracks - A numerical procedure for solving the equations of elasto-plastic flow in three independent variables
Equations for solving initial and boundary value problems in elastoplastic flow in longitudinally stressed, axisymmetric notched rods
Swedlow, J. L.↗
Trapped modes in plasma slabs and cylinders
Trapped modes in uniform, cold magnetoplasma slabs and rods
Weil, A. J.↗
One-dimensional wave motion in prismatic bars due to impulse loads with and without Coulomb damping
Friction induced one dimensional wave propagation in rods
Tomlin, D. D., Jr.↗
Basic research on liquid-drop-impact erosion Quarterly report, 8 Dec. 1966 - 8 Mar. 1967
Liquid drop impact erosion - single impact helium driven gas gun, target materials, and elastic wave theory applied to impact of rods
Engel, O. G.↗
Damping of thermoelastic structures
Damping of longitudinal waves traveling in thermoelastic cylindrical rod
Gillis, W. M.↗
Gaseous control system for spaceborne reactors.
Gaseous control systems for spaceborne nuclear reactors noting advantages over traditional control rods
Davison, H. W.↗
An ultrasonic method for studying elastic moduli as a function of temperature
Ultrasonic method is used to determine the elastic moduli of materials used in components of high-temperature nuclear reactors. An ultrasonic, pulse-echo technique determines the velocity of sound waves propogating in a heated region of rod-shaped specimens. From these velocities, the elastic moduli are calculated.
Peterson, R. G.↗
Damping of thermoelastic structures
Report ascertains the effects of thermoelastic damping on the propagation of longitudinal waves in cylindrical rods. Review of results of wave propagation in unbounded elastic solids and in elastic cylinders precedes consideration of thermal modification of elastic properties.
Gillis, W. M.↗
Monopole mass spectrometer with improved sensitivity and reduced background
Monopole mass spectrometer is increased by nearly an order of magnitude when a weak external magnetic field is applied so that the ion beam is deflected towards the rod. This magnetic field eliminates background noise at the low end of the mass scale.
Herzog, R. F.↗
Long term operations of in-pile and out-of- pile thermionic converters, parts 1 and 2
In-pile life tests of cylindrical thermionic converter rods for Mark 6
Holland, J. W.↗
Analysis of two alternate damping systems for GEOS gravity gradient stabilized satellite
Magnetically anchored eddy current and eddy current rod dampers for GEOS gravity gradient stabilized satellite
Source record↗
Trapped modes in plasma slabs and cylinders.
Trapped modes in cold magnetoplasma slabs and rods in free space analyzed by Maxwell equation, assuming DC magnetic field and homogeneous electrons distribution
Klevans, E. H.↗
Superconducting ''transistor'' acts as high-speed switch
Cryogenic, three-terminal device yields current-voltage characteristics of ordinary transistor. Device consists of two superconducting tin rods in a crossed-wire geometry, separated by a thin gold film. New construction technique is described and possible applications are discussed.
Meissner, H.↗