Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1524 for “"Dissertations, Academic"”.
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Chemoprotective action of natural products on cultured human epithelial cells exposed to aflatoxin B1
Submitted in fulfilment of the requirements for the Degree of Doctorate of Technology: Biotechnology, Durban Institute of Technology, Durban, South Africa, 200.
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An in vitro investigation of the effects of surface corrosion on the metal element content and tensile strength of orthodontic silver brazed stainless steel joints arising from varying exposure periods in Fusayama's artificial saliva
Thesis (Masters in Technology: Dental Technology), Durban Institute of Technology, Durban, South Africa, 2004
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Three Studies Examining Nonprofessional Investors' Decision Making
This dissertation consists of three studies exploring nonprofessional investors' decision making. Technological advancements witnessed by the capital markets in recent years have caused significant changes to the dissemination and use of information, particularly by nonprofessional investors. Among …
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Homogeneous equilibria in hydrothermal fluids at near critical conditions.
The activities of aqueous entities in fluids from active hydrothermal systems can provide detailed fluid-mineral equilibria information. Numerical integration of the equations describing homogeneous equilibria as a function of temperature and pressure is the best way to determine ion activities at …
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The moderating effect of problem characteristics on the expertise-decision-making link.
The goal of this research was to demonstrate that there are benefits to expertise when solving complex problems that have ambiguous characteristics. This research effort was motivated by the expertise-performance paradox (Camerer and Johnson 1991), a counter-intuitive finding that despite greater …
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Three essays on ownership structure and firm focus: The impact of ownership structure on the corporate sell-off decision; The long term impact on the firm from large sell-offs; The relationship between ownership structure, firm focus, and Tobin's Q.
Three essays relating to ownership structure and firm focus are presented. The first study analyzes the relationship between ownership by officers and directors and the corporate sell-off decision. The relationship is formalized in a simple theoretical model; the analysis suggests a negative …
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A comparative study of putative melanogenic and melanogenesis inhibiting substances in the vertebrate integument.
It has been suggested that vertebrate pigment patterns are determined and maintained by factors which are present in the integument. The research reported in this dissertation provides some evidence in favor of this supposition. Examination of the deer mouse, Peromyscus boylei, demonstrated that …
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Kinematics and stellar populations of the galactic bulge.
In order to measure radial and/or rotation velocities and obtain metallicities for the stellar population of the Galactic bulge, several hundred spectra of giants have been obtained. These include three bulge fields at projected distances from the Galactic center of 1.5, 1.7 and 1.7 kpc, and 33 …
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Microscopic Theory of the Knight Shift
This dissertation is the beginning of the development of a microscopic theory of the Knight shift. The Knight shift experiment has been used in superconductivity research throughout history, however, a complete understanding of the Knight shift in conventional as well as unconventional …
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The evaluation of liquid hydrocarbon contamination of soil around petrochemical tank farms at a Durban refinery
Submitted in fulfilment of the requirements for the Degree of Master of Technology: Chemistry, Durban Institute of Technology, Durban, South Africa, 2004.
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Women and Time: Food Work Politics of Self Defined Healthy Men
This study examined the way gender operates in relation to time within the food work spectrum discussed in 19 narratives. The 19 narratives came from individual open ended face-to-face interviews with self-defined healthy men who shop at healthy food stores. This study's examination of how gender …
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Functional Identification of Nucleus Tractus Solitarius (NTS) Barosensitive Neurons: Effect of Chronic Intermittent Hypoxia (CIH)
Chronic Intermittent Hypoxia (CIH) is a model used to study obstructive sleep apnea (OSA). Previously, we showed that baroreflex control of heart rate (HR) (baroreflex sensitivity) is reduced in CIH rats. While afferent function and HR in response to vagal efferent stimulation are enhanced, the …
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Synthesis and electrochemistry of 1,2,4,6-thiatriazine radicals
1,2,4,6-thiatriazine radicals can be neutral radical conductors in the context of molecular metal design. After initial investigations they were ignored in favor of other prospective ring systems. A more general route to 1,2,6-thiatriazine radicals herein is reported. Two crystal structures were …
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Parameter estimation in reconstructing temperature fields during hyperthermia.
In this dissertation, a state and parameter estimation algorithm is implemented and modified to predict the blood perfusions and thus the complete steady-state temperature fields based on input from a limited number of temperature measurements taken during simulated hyperthermia treatments. Several …
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The behavior of water at the modified silica interface.
The behavior of water at the modified silica interface was studied with Differential Scanning Calorimetry. A model for the interaction of water with the surface of silica was evolved to include the influence of the silica surface, the modification of the surface with hydrophobic and hydrophilic …
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Soviet advanced technology: The case of high-performance computing.
… immature technologies, had an industrial vs. academic orientation, and were developed in conjunction with production facilities. The benefits of the reforms--direct contacts between organizations, increased local control of finances and research, greater flexibility in the management of R&D, …
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