Operational considerations for the use of loran-C skywaves for time synchronization
Time synchronization of loran C navigation system and characteristics of sky wave reception operation
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Time synchronization of loran C navigation system and characteristics of sky wave reception operation
Synchronous dc direct-drive system comprising multiple-loop hybrid control system controlling load directly connected to actuator
Rectification efficiency and reliability of driven transistor synchronous rectifiers
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Low cost TV ground receiving systems for signals transmitted from synchronous satellites, describing reception techniques, manufacturing and performance characteristics
The electron spectrum predicted for the synchronous orbit was simulated to determine the effects that might occur to astroscientists exposed to such irradiation while on a prolonged space station mission in that region. Miniature pigs were exposed to monoenergetic and spectral-fractionated irradiations with 0.5 to 2.1 MeV electrons. Clinical and pathological alterations observed in biopsies were correlated with depth-dose pattern and length of post irradiation period up to one year. With monoenergetic electrons, the lowest dose causing a recognizable lesion was 1450 rad and with increasing dose lesions appeared earlier and were more severe. At the highest dose given, 2650 rad, ulceration extending into the dermis was present by twenty one days and required about four months for complete healing. Spectral-fractionated irradiations, in which the total dose range was essentially comparable to that of the monoenergetic series, resulted in very minimal outer dermis edema at 1790 rad and at no dose employed did necrosis of epidermis or ulceration into dermis occur.