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Thermoregulatory models of mature adults have been developed using the well established theory of hypothalmic temperature control about a set point. Experimental investigations have indicated that thermoregulation in newborn infants is different than that of mature adults. Thermoregulatory models require precise repeatable hypothalmic temperature data to which they can be compared and improved. The 0.1C or less oscillations of the hypothalmic temperature about its set point indicates the precision of temperature sensing and control in the human body. Measurement capabilities of 0.02C change in hypothalmic temperature are considered adequate to verify sophisticated adult models and to generate dependable data for development of newborn infant thermoregulatory control models. The purpose of this thesis is to document the precision of the prototype temperature telemetry system developed. This will be accomplished by exploring the physiological and experimental background of thermoregulation, describing the prototype device which was developed and finally by evaluating its performance as a method of precise physiological temperature measurement. / Master of Science

A thesis submitted to the faculty of engineering university of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy Johannesburg 1991 / Analysis of temperatures measured in an experimental coal bed (using the classical conductive-convective approach) confirm previously published permeabilities of similar beds, and furthermore validate the use of heat- transfer coefficients at exposed surfaces of coal stockpiles, The range of the estimated heat transfer coefficients is similar to natural convective coefficients at flat horizontal surfaces, which is expected. [Abbreviated Abstract. Open document to view full version] / GR2017

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Water and R-134a sprays as they impinge on the flat endplate of a circle are studied experimentally. In order to optimize water and R-134a sprays cooling efficiency, a detailed characterization and understanding of the spray formation is essentially needed. The effects of the jet exit velocity and Weber number on spray segregation are investigated. An optical image system was used to quantify the droplet size and distribution. LDV measurements were used to characterize the local velocity and velocity fluctuation distribution from a commercial available nozzle in both axial and radial directions. It is found in the water spray that local mean droplet diameter (SMD) decreases as jet exit velocity increases and as jet proceeds further downstream as well. Furthermore, the SMD and radial velocity are found to be the largest at the outer edges of the water spray. In contrast, the radial velocity is found to be the smallest at the outer edges of the R-134a spray. The SMD and radial velocity continuously decrease across both the water spray and R-134a spray toward the jet axis; while the corresponding axial velocity is the maximum there. Moreover, the R-134a spray jet heat transfer in non-boiling regime was shown to be dependent on the velocity of the impinging jets in terms of Weber number and other related parameters which are in good agreement with those of previous studies.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 112-113). Also available on the Internet.

Thesis (M.S.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 61-63). Also available on the Internet.

Thesis (M.S.)--University of Missouri-Columbia, 2003. / Typescript. Includes bibliographical references (leaves 61-63). Also available on the Internet.

Thesis (Ph. D. in engineering science)--Washington State University. / Includes bibliographical references.