Aviat Space Envir Md
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We analyzed 884 moderately severe and severe casualties evacuated by the aeromedical evacuation unit of the Israel Air Force. Of these, 452 were evacuated during the "Yom Kippur" War in 1973, and 432 during 1974-76. ⋯ The advantages of small helicopters for aeromedical evacuation purposes are outlined. The suitability of the aeromedical evacuation system in Israel for wartime as well as for peacetime is pointed out.
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Aviat Space Envir Md · Apr 1979
Saccadic velocity characteristics: intrinsic variability and fatigue.
Saccadic eye movements exhibit a characteristic peak velocity vs. amplitude relationship. As with all quantifications of biological function, there exists and associated intra- and intersubject variability of this relationship. This paper documents this variability and demonstrates both the absence of a predictable short-term "muscle fatigue" effect and the presence of a generalized "mental fatigue" (i.e. tiredness) effect.
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Asian, European, and American Indian men were subjected to craniofacial cooling to determine relative ranking and temperature curves for various facial skin sites. Moving and still air 0 degrees C to -35 degrees C in both laboratory and subarctic outdoor settings were used. The objective was to examine resistance to facial frostbite. ⋯ Racial differences in face temperatures were clearly shown at only the malar eminence, and there was some evidence that exercise can be used to enhance facial circulation. These results and those of other studies reviewed demonstrate that facial sites cooled by convection are usually ranked from forehead (warmest) through malar, cheek, and chin, to nose (coldest). When cooled by still air, the sites tend to retain that same ranking, but there is more variation in ranking.
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Aviat Space Envir Md · Jan 1979
Application of a bubble formation model to decompression sickness in rats and humans.
Although decompression sickness results from bubble formation in blood or tissue, pressure schedules currently in use are essentially empirical and contain little input from cavitation theory. The recent convergence of three lines of investigation suggests that a synthesis of practice and theory may now be possible. ⋯ We demonstrate that the model is also in good agreement with data on rats and humans over a wide range of pressures and that the model parameters assume sensible values in each case. This suggests that cavitation theory can provide a rationale for current diving practice and can serve to secure, consolidate, and extend this practice.