Observations of lower hybrid resonance phenomena on the OGO 2 spacecraft.
Continuous and triggered audio frequency noise bands associated with ionospheric lower hybrid resonance frequency observed on OGO 2
Johnson, W. C.↗
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Results for “Trigger”
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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Analytic solutions of limit cycles in a feedback-regulated converter system with hysteresis.
Mathematical model for voltage step-down DC to DC converter with hysteretic bistable trigger circuit regulating output voltage
Babaa, I. M. H.↗
A vacuum spark light source for the extreme ultraviolet region.
Vacuum spark light source for extreme UV noting mechanical trigger, compatibility with clean vacuum system and magnetic confinement of ions
Rudisill, J. E.↗
A precision frequency measurement technique for a moving signal with a low signal-to-noise ratio.
Frequency measurement of moving spacecraft RF carrier waves at low SNR by analog recording of noisy signal and HF trigger tone, noting data processing and signal fading rate
Kendall, W. B.↗
Controlled release of free-falling test models
Releasing device, powered by a drill motor through an adjustable speed reducer, has a spinning release head with three retractable spring-loaded fingers. The fingers are retracted by manual triggering of a cable at the motor end of the unit.
Fife, W. J.↗
High-powered automatic latching device
Latches automatically lock together two remotely controlled bodies when their triggers are engaged by the docking ring of the lesser body. Latches are disengaged by manual actuation of the handle of each latch through two complete cycles. Emergency locking by manual actuation is also provided.
Cobin, J. C.↗
High-accuracy detector for laser radar
Signal processing technique permits accurate timing of pulse position independent of pulse amplitude. Technique utilizes differentiator, limiter amplifier, Schmitt trigger, and monostable multivibrator to produce standard-width pulse whose leading edge corresponds with the maximum of the received signal. This pulse stops the range counter.
Ammon, G.↗
A universal multistable device
Functional diagram of transistorized multistable trigger circuit
Andrianov, E. M.↗
Large-scale shock formation in spiral galaxies and its implications on star formation
Two armed spiral galactic shock waves as triggering mechanism for gravitational collapse leading to star formation, considering gaseous disk motion using Schmidt model
Roberts, W. W.↗
Development and application of a spark source for multiply charged carbon ions
Triggered spark source for multiply charged carbon ions applied to collision cross section measurements
Koopman, D. W.↗
A high speed spectrograph shutter
Event-triggered high speed spectrograph shutter, studying shock tube plasmas
Miller, M. H.↗
Spark gap power switching for conical theta- pinch plasma gun
Air spark gap to switch stored charge in LC circuit, using auxiliary triggering circuit to clamp magnetic flux
Kuswa, G.↗
Intensity and energy spectrum of energetic cosmic ray electrons
Cosmic ray electron intensity and energy spectrum from nuclear emulsion-spark chamber combination detector triggered by scintillation and Cerenkov counters on high altitude balloon
Freier, P. S.↗
TRAPATT oscillations in a p-i-n avalanche diode
P-i-n avalanche diode trapped plasma avalanche triggered transit /TRAPATT/ oscillations characteristics and voltage waveform under square wave driving current, using computer program
Parker, D.↗
A superposition model of the spontaneous activity of cerebellar Purkinje cells
Superposition model of spontaneous activity of cerebellar Purkinje cells for spike triggering
Murphy, J. T.↗
Peak acceleration limiter
Device is described that limits accelerations by shutting off shaker table power very rapidly in acceleration tests. Absolute value of accelerometer signal is used to trigger electronic switch which terminates test and sounds alarm.
Chapman, C. P.↗
Amplifier for signal from thin film transducer
Electronic circuitry is devised to raise low level signal from platinum film type transducer to sufficient amplitude to trigger oscilloscope or time interval counter. Circuit can be used wherever it is necessary to raise level of low amplitude, low impedance positive polarity pulse source to a 5 or 6 volt level.
Jensen, K. A.↗
Stimulation of cardiovascular adaptability during prolonged space exposure
The deconditioning effects of weightlessness on the cardiovascular system of astronauts are discussed. It is believed that man cannot tolerate indefinite exposure to weightlessness without considerable circulatory deterioration. Analyses of data collected from space flights to date substantiate these beliefs, and confirm the fact that some form of compensation must be provided to keep the cardiovascular system of space travelers properly conditioned. Sequential pulsatile devices were investigated to produce periodic hydrostatic pressure gradients in the venous system of eight subhuman primates. Intermittent venous pooling of blood in the extremities triggers and stimulates the vascular reflex mechanisms of the cardiovascular system that may have significant benefits in maintaining the circulatory system in proper tone under weightless conditions. Electrocardiograms, blood pressure measurements, cardiac output and stroke volume determinations were used to evaluate the efficiency of the described technique. Results were amazingly consistent to indicate an efficient system for intermittently exercising the heart within safe and medically acceptable limits.
Gorman, H. A.↗