HUMAN PHYSIOLOGICAL RESPONSES TO SHELTER ENVIRONMENT
STANFORD RESEARCH INST MENLO PARK CA
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Three studies were conducted in simulated shelter environments. In Study A two experiments were conducted to determine the effects of subject- packing on changes in body temperature. Four pack conditions were studied using 8, 18, 32 and 48 subjects, respectively. In Experiment I the groups were exposed to 95, 98, 100 and 105FDB at 80RH for 4 hours. Experiment II examined the physiological responses of these groups at 95 and 98FDB and 60, 70, 80 and 90RH for 8 hours. The results of the first experiment supported the hypothesis that under crowded conditions the body temperature will rise faster than under less-crowded conditions. There is also support for this hypothesis in the second experiment however, the results were not as conclusive. In Study B, experiments were conducted to establish upper limits non-stress shelter environments for men operating a Package Ventilation Kit PVK. Eight subjects were exposed to DBTs ranging from 80F to 100F at 5F increments when the RH was 80. Exposure was for a maximum of 8 hours and the subjects worked pedaled 15 minutes and rested 15 minutes. The upper limits of the non-stressful environments were 90F DB at 0.05 hpman 85F DB at 0.10 hpman and 80F DB at 0.15 hpman. The purpose of Study C was to determine the acceptability of stored water and to establish ad lib. water consumption at various thermal environments. Six 24 hour tests at ETs of 82.0, 85.0 and 88.0 were conducted with 3 groups of 8 male subjects. The results showed that the mean water intake was independent of the type of water.
- Stress Physiology