Thesis (Ph. D.)--School of Electrical and Computer Engineering, Georgia Institute of Technology, 2004. Directed by Gary S. May. / Includes bibliographical references (leaves 109-113).

Proefschrift--Groningen. / "Stellingen" and tables inserted in pocket.

Thesis (Ph. D.)--University of Missouri-Columbia, 2002. / Typescript. Vita. Includes bibliographical references (leaves 88-90). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2002. / Typescript. Vita. Includes bibliographical references (leaves 88-90). Also available on the Internet.

This thesis examines how 18 University of Canterbury students based in Christchurch experienced housing insecurity during the three years after a series of major earthquakes from late 2010 and throughout 2011. I adopted a qualitative exploratory approach to gather students’ accounts and examine their experiences which were analysed using constructivist grounded theory methods. Three core categories were identified from the data: mobility, recreating security, and loss. Mobility included the effects of relocation and dislocation, as well as how the students searched for stability. Recreating security required a renewed sense of belonging and also addressed the need to feel physically safe. Lastly, loss included the loss of material possessions and also the loss of voice and political representation. The theory that emerged from these findings is that the extent to which students were able to control their mobility largely explained their experiences of housing insecurity. When students experienced a loss of control over their mobility they effectively addressed this by being resourceful and drawing on existing forms of capital. This resourcefulness generated a new form of capital, here called security capital, which represents a conceptual contribution to existing debates on students’ experiences of homelessness in a disaster context.

CO₂ enhanced oil recovery (CO₂-EOR) in residual oil zones has emerged as a viable technique to maximize both the oil production and carbon storage. Most CO₂ field projects suffer from inadequate sweep because of high mobility of CO₂ compared to the oil. Gas conformance techniques have the potential to further improve the effectiveness of CO₂-EOR projects. The choice of mobility control to improve the sweep efficiency is critical and simulation studies with hysteretic relative permeability and mechanistic foam model can assist in the choice of technique and optimization of the process for each reservoir. Two promising mobility control practices of Water Alternating Gas (WAG) and foam are evaluated using the in-house compositional gas reservoir simulator (DOE-CO₂). The effect of hysteresis and cycle dependent relative permeability on WAG and foam injections incorporating a new three-phase hysteresis model has been investigated. Simulations are performed with and without hysteresis to assess the impact of the saturation history and saturation path on gas entrapment, fluid injectivity and oil recovery. The foam assisted technique in CO₂-EOR processes has also been investigated. Here foam is generated in-situ by injecting surfactant solution with CO₂ rather than directly injecting foam. A simplified yet mechanistic population-balance model implemented in the in-house simulator has been applied to test the impact of foam. The results have been compared with an empirical foam model which is the standard model in commercial simulators. Simulations have been performed on actual field models for selection and optimization of the CO₂ injection scheme, quantifying the impact of hysteresis, depicting the effectiveness of CO₂-EOR process as against a surfactant flood, the effectiveness of foam assisted floods and insights into low tension gas flooding process. All the above analyses have also been performed on layer cake models with properties replicating the Permian Basin carbonate reservoirs and Gulf Coast sandstone reservoirs. Hysteresis shows an improvement in oil recovery of gas injection schemes where flow reversal takes place. Foam has been found to be effective and the models show lower CO₂ utilizations factors compared to the case without foam. / text

This report examines Hip Hop performance in Africa –with a focus on Nigeria- and analyzes how questions of race, racial identity, class and nationality feature in the works of African artists. The Nigerian/African artists themselves label their works “African Hip Hop” and they employ the aesthetics of the US and those of their local communities in their performances. Lately however, a couple of Nigerian artists –D’Banj and P Square- troubled the “African” in “African Hip Hop” by performing with popular African American Hip Hop artists, Snoop Dogg and Akon. It was a transnationalistic move that among other issues reflects the fluidity of identity. The performances in the videos of “Mr Endowed Remix” and “Chop My Money” also reflect identity (re)negotiation in postcolonial performances like Hip Hop. African Hip Hop, already, borrows the spectacles of US Hip Hop to express itself to African audiences. However, its collaboration with the US brings it in contact with various sociological issues -such as the conflation of race, class, gender and social mobility- that surround US Hip Hop. This report attempts a close reading of the meeting of “African Hip Hop” and “US Hip Hop” to understand how race, identity, and agency are negotiated in “African Hip Hop” / text

published_or_final_version / Dental Surgery / Master / Master of Dental Surgery

No description available.

This dissertation comprises three chapters. The first chapter develops a research design to estimate the causal effect of parental layoffs and income during adolescence on children's college outcomes, and implements this design on administrative data for the United States. The design compares outcomes of children whose fathers lose jobs before college decisions with outcomes of children whose fathers lose jobs after college decisions. I find that layoffs and unanticipated income losses during adolescence have very small adverse effects on future college outcomes. These effects are smaller than estimates in prior work based on firm closures rather than timing of layoffs. I replicate these larger estimates and show they are driven by selection of workers into closing firms. The findings suggest that relaxing parental liquidity constraints during adolescence will do little to increase enrollment compared to improvements in financial aid, especially for low-income children. The second chapter, written with my advisor and other colleagues, shows that classroom quality in early childhood has large causal impacts on adult outcomes, and that test score gains can help to identify classroom quality even when these gains fade out over time. We first link administrative data to records from Project STAR, in which 11,571 students in Tennessee and their teachers were randomly assigned to classrooms within their schools from kindergarten to third grade. We then document four sets of experimental impacts. First, students in small classes are more likely to attend college and exhibit improvements on other outcomes. Second, students who had a more experienced teacher in kindergarten have higher earnings. Third, students who were randomly assigned to higher quality classrooms in grades K-3 -- as measured by classmates' end-of-class test scores -- have higher earnings, college attendance rates, and other outcomes. Finally, the effects of class quality fade out on test scores in later grades but gains in non-cognitive measures persist. The third chapter explores theoretical properties of markets for "credence goods." Credence goods such as health care involve consumer reliance on expert diagnosis. When consumers observe expert cost functions, competitive markets tend strongly toward efficiency. I argue that consumers do not observe expert cost functions and extend an existing model to incorporate this insight. The key result is that prices and competition no longer eliminate mistreatment. / Economics