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ray recorder—a moving paper camera that recorded images from a cathoderay tube. it was later used in cardiac catheterization labs. by the early s, dr. gilson developed an electroencephalograph (eeg), a device that records the brain's electrical signals for diagnosing epilepsy, strokes, and tumors....
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these are also used for zero emission and hybrid vehicles, back-up power (for example for computers and telephone systems), and energy storage in remote power applications. figure uses of lead. the rest is used in a wide range of applications: radiation screening, either as metal sheet (when using x-ray...
are all suitable measurement devices. for mid-range vacuum requirements, those in the + torr to - torr range there are several choices including the capacitance manometer, for more accurate measurements, or the thermocouple or pirani type gauges. for high vacuum, from - torr to - torr, either cold cathode...
designed the sigsaly system became aware of the use of pcm binary coding as already proposed by reeves. in , for the canadian navy's datar system, ferranti canada built a working pcm radio system that was able to transmit digitized radar data over long distances. [ ] pcm in the late s and early s used a cathode-ray...
designed the sigsaly system became aware of the use of pcm binary coding as already proposed by reeves. in , for the canadian navy's datar system, ferranti canada built a working pcm radio system that was able to transmit digitized radar data over long distances. [ ] pcm in the late s and early s used a cathode-ray...