Engineering topics
Publications and source records attributed to Williams, B. A..
The potential use of local neck cooling in an area superficial to the cerebral arteries was evaluated by circulating cold or hot water through two copper disks held firmly against the neck. Subjective responses indicated that neck cooling improves the thermal comfort in a hot environment.
Attempt to determine what changes occur in the thermoregulatory control system during the simulated weightlessness of prolonged bed rest, as determined by measurement of the onset of sweating in response to an imposed heat load. The threshold for sweating occurred at a lower mean skin temperature and the normal vasodilation response appears to be impaired slightly. It is possible that the result of bed rest is to decrease the circulatory capability of the body (autonomic dysfunction) and the effect on the thermoregulatory system, therefore, is to decrease vasomotor heat loss capability.
Use of a recently developed servocontrolled infrared optometer to continuously record the state of monocular focus while subjects viewed a visual target for which the stimulus to focus was systematically varied. Calculated parameters form recorded data - e.g., speeds of accommodation to approaching and receding targets, magnitude of accommodation to step changes in target distance, and amplitude and phase lag of response to sinusoidally varying stimuli were submitted to periodicity analyses. Ear canal temperature (ECT) and heart rate (HR) rhythms were also recorded for physiological correlation with accommodation rhythms. HR demonstrated a 24-hr rhythm, but ECT data did not.
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Preoptic and environmental temperature effects on hibernator thermoregulatory responses, noting changes in metabolic rates