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The effects of alterations in barometric pressure on human beings are described. Human tolerances for gaseous environments and low and high barometric pressure are discussed, including effects on specific areas, such as the ear, lungs, teeth, and sinuses. Problems due to trapped gas within the body, high dynamic pressures on the body, and blasts are also considered.
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An analysis of the electronic simulation of barometric pressure used to self-test the counter electronics of the digital barometer is presented. The barometer is part of the Meteorological Monitor Assembly that supports navigation in deep space communication. The theory of operation of the digital barometer, the design details, and the verification procedure used with the barometric pressure simulator are presented.
Reaction of blood system of dog to reduced barometric pressure
Low barometric pressure, high carbon dioxide concentration and water availability on simulated Mars environment related to survival and growth of bacillus cereus
Effect of gas expansion in gastrointestinal tract during barometric pressure changes on respiratory and cardiovascular reflexes
Pressure chamber experiments on mice to determine barometric pressure effects on susceptibility and resistance to infection
Changes in respiratory and cardiovascular functions after prolonged exposure to low barometric pressure
NASA Marshall Space Flight Center (MSFC) in collaboration with DLA Land and Maritime-VAC support is conducting a survey to obtain feedback on the device electrical bias procedures specified in method 1001 of MIL-STD-750-1, Barometric Pressure (reduced)’. The purpose of this survey is to obtain input from the DLA Land and Maritime qualified manufacturer community to determine whether additional bias details or information should be specified within the test method. The survey results will be used to improve any test method deficiencies and result in consistent test results.
High and low barometric pressure effects on susceptibility and resistance to infection
High and low barometric pressure effects on susceptibility and resistance to infection
Effects of high and low barometric pressures on susceptibility and resistance to infection in mice
Effects of high and low barometric pressures on susceptibility and resistance to infection
Many factors affecting artificial gas atmosphere, which is used to maintain life during space flight, are considered. The wide variability of barometric pressure in spacecraft, due in large measure to spacecraft design is discussed. Explosive decompression is described; this develops from instantaneous depressurization of the cabin. Decompression sickness is reviewed, including bubble growth and evolution of gas bubbles in organisms. Dysbarism, hypoxia, and hypercapnia are also discussed.
Altimeter and sea level pressure data from the Geosat mission are analyzed for evidence of inverted barometer responses of sea level to atmospheric pressure forcing. Estimates of the inverted barometer coefficient are given for a variety of geographic regions and time scales using various orbit error removal strategies. There is some sensitivity to the orbit error removal method, but the estimated coefficients show a clear latitudinal dependence and are generally between -0.5 cm/mbar and -0.9 cm/mbar. The southern oceans respond slightly more like an inverted barometer than the northern oceans for similar latitudes. The regression exhibits significant geographic variability, particularly near major circulation features and in the northern hemisphere. The results suggest that the inverted barometer approximation is resonable over much of the oceans, but that some sea level variability may be correlated with barometric pressure by means other than the inverted barometer effect.
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Human performance during prolonged stay in low pressure chamber
Higher nervous activity changes in stimulus response for dogs under rarefied air and anoxic conditions