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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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TWM /Traveling Wave Master/ comb structure serves as a highly stable microwave delay line for determining the short-term stability of the hydrogen maser frequency standards used in the deep space network. Cryogenic cooling is used to minimize signal attenuation and thermal noise.
Measurement of effective delayed neutron fraction for Zero Power Reactor I
Hydrogen effect on delayed cracking tendency of titanium alloys
Delayed failures and crack formations during welding of titanium alloys and steels
Cislunar electron density determined by radar group delay measurements
Closed-loop compensatory tracking for measuring operator delay time in control action
Crack propagation, delayed failure, and residual static strength of titanium, aluminum, and stainless steel alloys in air, three percent salt solution, and sea water
Optimal control problems for systems described by delay differential equations
Delayed fracture tests and brittle properties of titanium aluminum zirconium alloy
Optimal type of strategy of remote control and force sensitive and stable feedback presentation in master-slave manipulators with transmission delay
Radar measurement of differential group delay to moon, showing large differences in total cislunar electron content above 1000 km in solar and antisolar directions
Uranium content of chondrites measured by thermal neutron activation and delayed neutron counting
Visual and gravitational factors in delay in perception of oculogravic illusion
Adaptation to displaced and delayed visual feedback during hand movement
Time optimal control study of second-order linear system with delay
Controllability type applicable to optimal control problems for systems described by delay differential equations
Necessary conditions for optimal control systems with adjustable delay time obtained from first order variation of performance index
Asymptotic stability of feedback systems involving time delays and time varying nonlinearity, demonstrating Popov frequency condition