Thesis (M.A.)--University of South Florida, 2002. / Title from PDF of title page. Includes bibliographical references.

As a result of the current interest in theories designed to explain the processes whereby precipitation originates in clouds and, if possible, to devise methods of causing or initiating precipitation at times or places more desirable than those chosen by Nature, and particularly in view of certain assumptions made in the formulation of some of these theories, experiments are in progress to study the behaviour of water particles in a region of moist air and small water droplets such as is found in a cloud. For such experiments, some means of producing a cloud, preferably of controlled characteristics, in the laboratory is needed.

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Thesis (Ph. D.)--University of Toronto, 2004. / Adviser: Frank Wania. Includes bibliographical references (p. 154-163).

Thesis (M. Eng.)--Victoria University (Melbourne, Vic.), 2009. / Submitted in fulfilment of the requirements for the degree of Master of Engineering in Mechanical Engineering. Includes bibliographical references.

A timed exposure diffusive sampler (TEDS) sensitive enough to measure hourly averages of nitrogen dioxide (NO2) at low parts per billion levels was developed for use in epidemiological studies. TEDS can be used for a variety of atmospheric pollutants. TEDS was tested in the laboratory against known concentrations of NO2 and against well established NO2 measurement systems. It was then tested in the field against the Environmental Protection Agency's reference method for measuring NO2. The TEDS method appears well suited to epidemiological investigations of air quality and extends previous work in this area by offering improved time resolution of changes in pollutant concentration at a cost sufficiently low to permit its use in large scale studies. The TEDS method also shows potential for miniaturization for use in personal sampling.

In February 1994, EPA proposed to "refine" its carbon monoxide (CO) hot spot model, CAL3QHC, to increase its accuracy and reliability. Currently, this proposal includes using hourly meteorological data recorded at airports near the modeling sites instead of the worst case conditions now recommended as a modeling default. The analysis in this study has shown that airport data should be used only on a situational basis as discrepancies exist between airports and local intersections. It is unclear if the added meteorological data will improve CAL3QHC's performance. This study also compares actual CO concentrations and their corresponding meteorology with the worst case modeling defaults. The highest CO levels are occurring at calms (wind speed less than one meter per second) which are not able to be modeled with the current Gaussian dispersion equation in CAL3QHC. Given the findings of this analysis and the lack of other scientific evidence supporting the proposed refinements, recommendations for developing an alternative model improvement plan are outlined. / Graduation date: 1995

Thesis (Ph. D.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains xv, 134 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 133-134).

Typescript (photocopy). / Digitized by Kansas Correctional Industries