Synthetic Metallic Spherules in a Philippine Tektite
Metal spherules synthesized by melting philippine tektites
TEKTITE↗
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Results for “Synthesizers”
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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Digital Distributed Parameter Model for Analysis of Unsteady Flow in Liquid-Filled Lines
A distributed parameter model for computing unsteady flow conditions in liquid systems is presented. The model is adapted for use in conjunction with a digital computer. The analytical method employed is essentially a solution synthesized from the effects of incremental step pressure pulses. The pressure pulses are generated because of incremental flow-rate changes that originate in a fluid system from a variety of sources, including the mechanical motion of the system structure. The pressure pulses propagate throughout the system at sonic velocity and are partially transmitted and reflected at each discontinuity. The velocity change caused by each pressure pulse is obtained from the relation for the characteristic acoustic impedance. Pressure and velocity time histories at any point in the system are obtained by a timewise summation of the contributions of the incremental pressure pulses passing that point. The analysis is presented in a form general enough to be applied to a variety of liquid-filled fluid systems. To illustrate the application of the method to a specific system, the response of a long, straight propellant line to a sinusoidal inlet flow and pressure perturbation is computed. Both a constant-cross-section line and a tapered line are analyzed in the example.
UNSTEADY FLOW↗
Fundamental studies on the synthesis of heat- resistant polymers progress report no. 4, 1 feb. 1963 - 1 jun. 1964
Syntheses of conjugated polymeric Shiff bases and azo-methines
POLYMER CHEMISTRY↗
Reproducible magnetic field sweep.
Reproducible magnetic field sweep consisting of phase-locked system with digital frequency synthesizer
FREQUENCY SYNTHESIS↗
A natural first approximation to low-thrust trajectories between satellite orbits of the earth and moon.
Low thrust satellite transfer between Earth and Moon orbits based on two-body trajectories and systematic synthesizing process
ORBITAL TRANSFER↗
Energy dissipating structures - a structures- materials-design synthesis.
Ideal energy dissipating mechanisms to synthesize weight or mass index in terms of pertinent design indices, structural efficiency and material efficiency parameters
CYLINDRICAL SHELL↗
Phase detector with internal reference.
Phase detection circuit synthesizes phase reference signal from phase modulated input signal without using external reference signal
PHASE DETECTOR↗
A natural first approximation to low-thrust trajectories between satellite orbits of the earth and moon.
Low thrust satellite transfer between Earth and Moon orbits based on two-body trajectories and systematic synthesizing process
ORBITAL TRANSFER↗
Substituted silane-diol polymers have improved thermal stability
Organosilicon polymers were synthesized to produce improved physical and chemical properties, including high thermal stability. Of the polymers produced, poly/4, 4 prime-bisoxybi- phenylene/diphenylsilane, formed from bis/anilino/diphenylsilane and p, p prime-biphenol, was found to have the most desirable properties.
Byrd, J. D.↗
Dynamic stability of a flexible booster subjected to a gimbled, periodically-varying end thrust Technical memorandum no. 104
Dynamic structural behavior of large rocket booster synthesized by two thin-walled cylinders and subjected to periodically varying end thrust
THIN WALLED SHELL↗
Wave-Plan Analysis of Unsteady Flow
An analytical method for computing unsteady flow conditions in liquid-filled flow systems is developed. The method which is called the wave plan incorporates distributed parameter and nonlinear effects including the effects of viscous resistance. The wave plan is essentially a solution synthesized from the effects of incremental step pressure pulses. The pressure pulses are generated because of incremental flow-rate changes that originate in a hydraulic system from a variety of sources, including the mechanical motion of the system structure. The pressure pulses propagate throughout the system at sonic velocity and are partially transmitted and reflected at each discontinuity. The velocity change caused by each pressure pulse is obtained from the Joukowski relation. Pressure and velocity time histories at any point in the system are obtained by a timewise summation of the contributions of the incremental pressure pulses passing that point. The analysis is presented in a form general enough to be applied to a variety of hydraulic systems. To illustrate the application of the method to a specific system, the response of a straight hydraulic line to a sinusoidal orifice-area variation of an upstream valve is computed. Both a constant-cross- section line and a tapered line are analyzed in the examples, and various nonlinear effects evaluated. Comparisons are carried out with experimental data obtained for the constant-diameter line and good agreement is shown to exist.
UNSTEADY FLOW↗
Research and development of an optimized laboratory speech-compression system for spacecraft application Final report, 25 May 1965 - 25 May 1966
Optimized laboratory narrow-band speech compression system for spacecraft application - single-equivalent formant concept, two-formant synthesizer, multiplexing and circuitry
SPACECRAFT COMMUNICATIONS SYSTEM↗
Energy dissipating structures - A structures- materials-design synthesis.
Ideal energy dissipating mechanisms to synthesize weight or mass index in terms of pertinent design indices, structural efficiency and material efficiency parameters
STRUCTURAL DESIGN↗
Synthesis of low frequency transfer functions with microelectronic circuits.
LF transfer functions synthesized with microelectronic circuits
NETWORK SYNTHESIS↗
Arylenesiloxane copolymers
Arylenesiloxane copolymers with regularly ordered structures were discovered during efforts to develop organosilicon polymers. Arylenesilane and siloxane monomers were both synthesized in these experiments.
Breed, L. W.↗
Synthesis of various highly halogenated monomers and polymers
Halogenated polyurethane and polycarbonate are synthesized and found to be LOX compatible but dependent upon the type nitrogen bonding.
Hollander, J.↗
Uranyl phthalocyanines show promise in the treatment of brain tumors
Processes synthesize sulfonated and nonsulfonated uranyl phthalocyanines for application in neutron therapy of brain tumors. Tests indicate that the compounds are advantageous over the previously used boron and lithium compounds.
Frigerio, N. A.↗
Computer program for network synthesis by frequency response fit
Computer program synthesizes a passive network by minimizing the difference in desired and actual frequency response. The program solves for the critical points of the error function /weighted least squares fit between calculated and desired frequency response/ by the multivariable Newton-Raphson method with components constrained to an admissible region.
Green, S.↗