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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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Multichannel telemetry system is used for chronic implantation in animals to monitor a variety of physiological parameters. A hermetically sealed unit, the system uses a time-sharing multiplex scheme to commutate between various sensor inputs and enables the number of channels to be increased or decreased.
System design and fabrication methods for multiple channel, physiologically implantable, telemetering systems
Implantable multi-channel temperature transmitter
Operation and maintenance of multichannel, physiologically implantable telemetering systems for biological measurements
Multichannel, physiologically implantable telemetering system for biological measurements
Ion implantation process for fabricating active devices in high bandgap semiconductor materials for high temperature operation
Multichannel telemetry system for chronic implantation in animals to monitor physiological parameters
Ion implantation techniques for p-n junction diodes of silicon carbide and gallium arsenide
High temperature ion source developed for implantation and surface reactions of Ar, Pb, and Ga ions
Ion implantation for reducing space charge buildup in thermal oxides on silicon exposed to ionizing radiation
N-type layer formation with ion implanted nitrogen or Sb in p-type alpha-SiC, evaluating electrical characteristics, discussing junction devices formed
Ion-implanted GaAs junction diodes anneal behavior and defect nature
Heart dimension measurement by miniature implantable ultrasonic sonomicrometer, describing system design and operation
Heart diameter is derived from measured transit time of 2.25 MHz ultrasonic pulse between two piezoelectric crystals attached to diametrically opposite heart surfaces. Miniature instrument implanted in chest telemeters information to external receiver-converter. System permits continual dimensional data recording taken from awake animals during long-term experiments.
Implanting nitrogen ions improves hardening of silicon oxides 30 percent to 60 percent against ionizing radiation effects. Process reduces sensitivity, but retains stability normally shown by interfaces between silicon and thermally grown oxides.
Miniature, totally implantable, solid state RF-controlled switching circuit for biotelemetry systems consumes zero power in off condition and turns on or off by pulse of RF energy. Switch, the size of small coin, is reducible by integrated circuit techniques.
Biotelemetry apparatus with dual voltage generators for implanting in animals
Ion implantation forming of conducting layers and p-n junctions in gallium arsenide and silicon carbide