Thesis advisor: Henry Braun / Given the call for greater understanding of racial inequality in student achievement in K-12 education, this study contributes a comprehensive, quantitative, longitudinal examination of the achievement gap phenomenon, with particular attention to the organization characteristics of schools and school districts. Employing data from a large number of districts in a single state, it examines the trends in achievement and the growth in achievement after the passage of NCLB. It focuses on mathematics performance from grade 6 to grade 8. Both a traditional descriptive approach and one employing Hierarchical Linear Models were applied and compared. The purpose was not to determine which methodology is superior but to provide complementary perspectives. The comparison between the two approaches revealed similar trends in achievement gaps, but the HLM approach offered a more nuanced description. Nonetheless the results suggest that it is useful to employ both approaches. As to the main question regarding ethnicity, it appears that even if student ethnicity is confounded with other indicators, such as initial score and socio-economic status, it is still an important predictor of both achievement gaps and achievement growth gaps. Moreover, demographic profiles at the school and district levels were also associated with these gaps. / Thesis (PhD) — Boston College, 2009. / Submitted to: Boston College. Lynch School of Education. / Discipline: Educational Research, Measurement, and Evaluation.

Thesis advisor: Hong Ding / Thesis advisor: Vidya Madhavan / High temperature superconductivity has been one of the most challenging problems in condensed matter physics since its discovery. This dissertation presents systematic studies on the single layer high temperature superconductor Bi2Sr2-xLaxCuO6+delta by scanning tunneling microscopy. The STM results have been compared to Angle-resolved photoemission spectroscopy (ARPES) data. Using STM spectroscopy and ARPES we observed two distinct gaps that coexist both in real space and in the antinodal region of momentum space, below the superconducting transition temperature. By looking at the energy scale of these two gaps along with the temperature dependence data, we fnd that the small gap is associated with superconductivity. The large gap persists above Tc, and seems linked to observed charge ordering. We also find a strong correlation between the large and small gaps suggesting that they are affected by similar physical processes. This is the first time that two coexisting and competing energy scales have been directly observed in STM spectroscopy. Combining this with ARPES data, we show that the pseudogap may be a diffferent order parameter from the superconducting phase. This provides support to the recently proposed "two gaps scenario" and should lead to more experimental discovery and theoretical discussions. In this dissertation we also discuss the spatial properties of the scanning tunneling microscopy conductance maps, as well as the charge ordering pattern at high energies. We observe interesting periodic patterns at low energies which can not be explained by a simple charge density wave picture. We also fnd the surprising bias dependence in terms of the contrast reversal. We propose a model of STM measuring effect to explain these phenomena. / Thesis (PhD) — Boston College, 2009. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Physics.

The need for governance institutions in Ghana to focus on policy results that impact directly on citizen's wellbeing rather than results that are achieved immediately after implementing program of activities has become more relevant than ever before due to widening policy gaps (the difference between policy intention and policy outcome) in Ghana. Defective policy implementation by the Ghanaian Civil Service is widening policy gaps in Ghana. With the aid of the institutional analysis and development framework, this quantitative study examined the relationship between policy gaps and governance in Ghana. Empirical data were collected from 539 Civil Servants in Ghana using a web-based survey. The 539 Civil Service participants in this study were chosen from a list of all Civil Servants obtained from the Office of the Head of Civil Service in Ghana. Multiple linear regression was employed to test the extent to which 6 governance indicators affected policy gaps. Findings showed a significant negative relationship between the regulatory quality governance indicator and policy gaps. The study also found no significant relationship between policy gaps and other governance indicators, namely voice and accountability, political stability, regulatory quality, rule of law, governance effectiveness, and control of corruption. These results suggest that implementing public policies relating to trade and investment, taxes, tariffs, and other regulatory issues that seek to enhance the development of the private sector significantly reduces policy gaps. This study leads to positive social change by helping the civil service improve policies and procedures to services for the citizens it serves.

Syftet med föreliggande studie var att försöka reda i litteraturen kring två välkända begrepp inom Affective Forecasting nämligen Impact Bias, som innebär att människor har en tendens att överskatta i vilken utsträckning de kommer att uppleva en viss känsla i en framtida situation än vad som senare visar sig vara fallet, och Empathy Gaps, som innebär att människor har en tendens att underskatta i vilken grad känslotillstånd kommer att påverka deras preferenser i en framtida situation samt pröva dessa begrepp i en och samma enkätundersökning. Etthundra sextiotvå studenter, slumpvist uppdelade i två grupper, Känslogrupp och Preferensgrupp, deltog frivilligt i undersökningen. Enkätundersökningen var en mixad design med grupp (känsla kontra preferens) som mellangruppsfaktor och förtest kontra eftertest som inomgruppsfaktor. I studien visade samtliga gruppers resultat i linje med Impact Bias teorin, dvs. att deltagarna i både Känslogrupp och Preferensgrupp skattade lägre i eftertest (actual) än pretest (forecasting). Resultatet diskuteras bla. utifrån Construal Level Theory, CLT. Förslag på vidare forskning ges.

The research question that I posed for this investigation is how the principles of Foucault’s governmentality can shed light on the political discourse on the achievement gaps (AGs) at the federal level. The AGs have been for some years now an actively researched phenomenon in education in the U.S. as well as in the rest of the world. Many in the education profession community, politicians, social activists, researchers and others have considered the differences in educational outcomes an indication of a grave deficiency of the educational process and even of the society at large. I began this work with a review of the educational research relevant to the above mentioned research question. Then I presented my research methodology and de- scribed how obtained my data and analyzed them both qualitatively and quantitatively. The results of the analysis were discussed in the light of federal legislation, the work of Foucault on governmentality, and the relevant literature and woven into a series of narratives. Finally, I abstracted these narratives into a model for under- standing the federal policy discourse. This model consists of an intersection of eight antitheses: (1) the rgime of discipline versus the apparatuses of security, (2) the appeal to danger versus assurances of progress or even success, (3) the acknowledgement of the association between the AGs and the “disadvantage” of the students and the disregard and even prohibition of the equalization of school funding, (4) the desire for all students to be “equal,” but they have to be dis-aggregated, the (5) injunction of research based instruction practices imposed by an ideology-driven reform policy, (6) we expect equal outcomes by using market forces, which are known to produce a diversity of results, (7) the teacher is a “highly qualified” professional, but also a functionary of the government, and finally (8) the claim to honor local control and school flexibility versus the unprecedented federalization and bureaucratization of the schools, which is a mirror of the contrast between the desire to establish apparatuses of security in schools and the means to establishing them through rgimes of discipline.

Videogrammetry is an affordable and easy-to-use technology for spatial 3D scene recovery. When applied to the civil engineering domain, a number of issues have to be taken into account. First, videotaping large scale civil infrastructure scenes usually results in large video files filled with blurry, noisy, or simply redundant frames. This is often due to higher frame rate over camera speed ratio than necessary, camera and lens imperfections, and uncontrolled motions of the camera that results in motion blur. Only a small percentage of the collected video frames are required to achieve robust results. However, choosing the right frames is a tough challenge. Second, the generated point cloud using a monocular videogrammetric pipeline is up to scale, i.e. the user has to know at least one dimension of an object in the scene to scale up the entire scene. This issue significantly narrows applications of generated point clouds in civil engineering domain since measurement is an essential part of every as-built documentation technology. Finally, due to various reasons including the lack of sufficient coverage during videotaping of the scene or existence of texture-less areas which are common in most indoor/outdoor civil engineering scenes, quality of the generated point clouds are sometimes poor. This deficiency appears in the form of outliers or existence of holes or gaps on surfaces of point clouds. Several researchers have focused on this particular problem; however, the major issue with all of the currently existing algorithms is that they basically treat holes and gaps as part of a smooth surface. This approach is not robust enough at the intersections of different surfaces or corners while there are sharp edges. A robust algorithm for filling holes/gaps should be able to maintain sharp edges/corners since they usually contain useful information specifically for applications in the civil and infrastructure engineering domain. To tackle these issues, this research presents and validates an improved videogrammetric pipeline for as built documentation of indoor/outdoor applications in civil engineering areas. The research consists of three main components: 1. Optimized selection of key frames for processing. It is necessary to choose a number of informative key frames to get the best results from the videogrammetric pipeline. This step is particularly important for outdoor environments as it is impossible to process a large number of frames existing in a large video clip. 2. Automated calculation of absolute scale of the scene. In this research, a novel approach for the process of obtaining absolute scale of points cloud by using 2D and 3D patterns is proposed and validated. 3. Point cloud data cleaning and filling holes on the surfaces of generated point clouds. The proposed algorithm to achieve this goal is able to fill holes/gaps on surfaces of point cloud data while maintaining sharp edges. In order to narrow the scope of the research, the main focus will be on two specific applications: 1. As built documentation of bridges and building as outdoor case studies. 2. As built documentation of offices and rooms as indoor case studies. Other potential applications of monocular videogrammetry in the civil engineering domain are out of scope of this research. Two important metrics, i.e. accuracy, completeness and processing time, are utilized for evaluation of the proposed algorithms.

This dissertation comprises two essays. While the topics of both essays are different both are interrelated on the base of economic development. The first essay examines ethnic wage gaps on segmented labor markets with evidence from Latin American countries. The second essay revisits the determinants of fiscal decentralization with an emphasis on the role that geography plays in determining fiscal decentralization. The first essay contributes to limited literature on ethnic wage gaps in Latin America. It examines ethnic wage gaps for workers in formal and informal labor markets. Using data from Latin American countries we estimate and examine across-ethnic wage gaps for informal and formal markets, their changes over time, factors that explain their differences, and the wage gap distribution. More specifically, we verify that different ethnic wage gaps do exist across formal and informal markets; they behave differently not only at their means but also along the wage distribution. The results indicate that higher ethnic wage gaps in informal sectors exist not only on average but also throughout the distribution. In addition, we find that wage gaps have declined significantly over the last 10 years. we explain this by examining changes in the prices of institutional factors and changes in human capital endowments. The distributional analysis shows a decrease in the unexplained component, especially in the top part of the distribution. The second essay contributes to the existing literature on the determinants of fiscal decentralization by motivating theoretically and exploiting in depth the empirical relevance that geography has as a determinant of fiscal decentralization. The relationship between decentralization and geography is based on the logic that more geographically diverse countries show greater heterogeneity among their citizens, including their preferences and needs for public goods and services provisions. Communications and physical distance are also a very important issue and play a key role on the effect of geography over time. (Lora et. al., 2003) argue geography plays a key role in economic and social development, as well as in the institutional design of the countries; yet, this effect could be enhanced (or diminished) in the presence of better physical infrastructure or communications. The theoretical model in this paper builds on the work by Arzaghi and Henderson (2002) and Panizza (1999). For the empirical estimation, we use a panel data set for approximately 91 countries for the period 1960-2005. Physical geography is measured along several dimensions, including elevation, land area and climate. We construct a geographical fragmentation index and test its effect on fiscal decentralization. In addition, we interact the geographical fragmentation index with time-variant infrastructure variables in order to test the effect that infrastructure and communications have on the relationship between geography and fiscal decentralization. For robustness, we construct Gini coefficients for in-country elevation and climate. We find a positive and strong correlation between geographical factors and fiscal decentralization. We also find that while the development of infrastructure (in transportation, communications, etc.) tends to reduce the effect of geography on decentralization, this effect is rather small and mostly statistically insignificant, meaning that the impact of geography survives over time. The strategy has additional value because geography may be used as an instrument for decentralization in future econometric estimations where decentralization is used as an explanatory variable, but may be suspected to be endogenous to the economic process being studied (economic growth, political instability, macroeconomic stability, income distribution, etc.).

This thesis is concerned with the challenge truth-value gaps pose to the principle of bivalence. The central question addressed is: are truth-value gaps counterexamples to bivalence and is the supposition of counterexamples coherent? My aim is to examine putative cases of truth-value gaps against an argument by Timothy Williamson, which shows that the supposition of counterexamples to bivalence is contradictory. The upshot of his argument is that either problematic utterances say nothing, or they cannot be neither true nor false. I start by identifying truth-bearers: an utterance, for instance, is a truth-bearer if it says that something is the case. Truth-bearers are evaluable items, with truth- and falsity-conditions statable in corresponding instances of schemas for truth and falsehood. A genuine case of a truth-value gap should be an utterance that is neither true nor false but says something to be the case. But it is inconsistent to accept the schemas for truth and falsehood and the existence of genuine cases of truth-value gaps. Secondly, I expound Williamson’s argument, which explores this inconsistency, and I identify two kinds of strategy to disarm his argument: those that preserve the schemas for truth and falsehood, and those that do not. Neither strategy is found to be persuasive. Thirdly, I argue that cases of reference failure causing truth-value gaps illustrate the upshot of Williamson’s argument. Fourthly, I examine Scott Soames’s account of liar sentences as counterexamples to bivalence. Soames adopts a strategy of the first kind to avoid contradictions. I argue that his solution allows some contradictions to be true, and that he fails to show that liar sentences are truth-bearers. Finally, I examine Charles Travis’s case for isostheneia: an equal balancing of reasons to evaluate a statement as true or as false, in which case a statement is neither. Travis avoids contradictions by adopting a strategy of the second kind. I argue that the schemas for truth and falsehood are immune to Travis’s objections, and that isostheneia fails to identify evaluable items. The cases examined confirm that utterances that are neither true nor false say nothing. My claim is thus that truth-value gaps are not counterexamples to bivalence.

Thesis (M.S.)--West Virginia University, 2009. / Title from document title page. Document formatted into pages; contains vi, 68 p. : ill. (some col.), col. maps. Vita. Includes abstract. Includes bibliographical references (p. 61-67).

Thesis (M.S.)--University of Missouri-Columbia, 2005. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 11, 2007) Includes bibliographical references.