Self sealing disconnect for tubing forms metal seal after breakaway

Disconnect fittings form a positive metal seal when the fill tube pulls against a metal sleeve when disconnected by force. A specially designed sleeve surrounds the fill tube. O-rings in the shoulder of the sleeve and near the outer end of the fill tube seal against leakage

Trace levels of metallic corrosion in water determined by emission spectrography

Emission spectrographic method determines trace amounts of inorganic impurities in potable water. The capability of this innovation should arouse considerable interest among plant biologists, chemists working in organic synthesis, and pathologists

Grain growth inhibitor for porous tungsten materials

Boron, either uncombined or combined with nitrogen or carbon added to tungsten powder prior to processing, effectively inhibits grain growth. The tungsten material is stable up to 1800 degrees C

Thermofield Dynamics of the Heterotic String - Physical Aspects of the Thermal Duality -

The thermofield dynamics of the D = 10 heterotic thermal string theory is described in proper reference to the thermal duality symmetry as well as the thermal stability of modular invariance in association with the global phase structure of the D = 10 heterotic thermal string ensemble.Comment: 8 pages, LaTeX, Minor correction

How to capture active particles

For many applications, it is important to catch collections of autonomously navigating microbes and man-made microswimmers in a controlled way. Here we propose an efficient trap to collectively capture self-propelled colloidal rods. By means of computer simulation in two dimensions, we show that a static chevron-shaped wall represents an optimal boundary for a trapping device. Its catching efficiency can be tuned by varying the opening angle of the trap. For increasing angles, there is a sequence of three emergent states corresponding to partial, complete, and no trapping. A trapping `phase diagram' maps out the trap conditions under which the capture of self-propelled particles at a given density is rendered optimal.Comment: 5 pages, 4 figure

Telemetry word forming unit

Telemetry data unit to form multibit words for use between demodulator and compute

Evolution of Earth-Lunar Transportation Systems

Space science - earth-lunar missions - high-energy propellants and nuclear propulsion systems in manned space fligh

Method of producing refractory bodies having controlled porosity Patent

Production of refractory bodies with controlled porosity by pressing and heating mixtures of refractory and inert metal powder