Reid, J. M. | Engineering Papers

NASA NTRS1975

Processing and display techniques for Doppler flow signals

The goals of various processing and display techniques are derived from the Doppler spectrum. A meaningful measure of flow phenomenon was investigated, and this measure was presented to an operator. Important measures went beyond indication of velocity of flow or volume flow and included indications of the type of flow, i.e., laminar or turbulent, as well as geometric parameters such as depth, width or cross sectional area of the flow stream.

Reid, J. M.↗

NASA NTRS1973

Caloric balance during simulated and actual space flight

The in-flight caloric intakes of all Apollo astronauts are examined and shown to average about 25 kcal per kg per day. Measurement of weight changes following recovery indicates that about 0.15 kg of fat was lost per man per day in-flight for an average deficit of about 19 kcal per kg per day. Measurement of the caloric intake of astronauts under ground-based conditions and during hypobaric exposure indicated a caloric requirement which was not significantly different from the in-flight requirement adjusted for weight loss. Partial metabolic balance data and measurements of bone loss and body volume revealed that protein and mineral losses also occurred to an extent which would reduce the size of estimated in-flight caloric deficits.

Rambaut, P. C.↗