The aim of the study was to identify the factors that have an influence on the completion rates of undergraduate students in the fields of science, technology, engineering and mathematics (STEM). Using Tinto's retention rate theory as the theoretical foundation, data were collected from freshman who were enrolled in the years 2005 to 2008. Results showed gender and first-generation status were significant predictors of STEM completion and time taken to complete the degree. Institutional bias played a role in race/ethnicity not being a factor affecting completion rates, as this study was conducted at a Predominantly White Institution. SAT scores and first and second-year college GPA showed to have the most prominent influence on both STEM completion rate and time taken to complete the degree. Females with higher first-year college GPA and higher high school rank finished faster. Similar results were found with first-generation students as well. Students belonging to ethnic minority groups with higher SAT scores and college GPA had greater success in STEM fields as well. The study results can be used to increase completion rates of underrepresented students in the STEM fields, given what we know about the interactions between underrepresented student groups and the most important predictors.

To supplement earnings reported under generally accepted accounting principles (GAAP), public companies often voluntarily report alternative measures of earnings called non-GAAP earnings (NGE). These companies assert that NGE exclude the effect of non-recurring transactions, thereby helping users of financial information to better assess the company's past performance and prospects. Because NGE measures are not well defined, managers can exploit the inherent discretion in calculating NGE to mislead users. Prior studies provide arguments and evidence on the informative as well as opportunistic use of NGE. However, the studies have examined the characteristics and informativeness of NGE with a focus on U.S. companies. The results of studies that consider the NGE disclosure by U.S. companies may not be generalizable to the cross-listed companies because foreign financial reporting standards are different from the U.S. GAAP. Further, prior studies report a difference in earnings quality of U.S. firms and cross-listed firms, which can also result in a difference in the informativeness of their NGE. To fill this gap in literature, I examine whether the informativeness of NGE of cross-listed companies is different from that of U.S. companies. This study contributes to the debate on the informativeness of NGE. It provides evidence that in general, …

Although the recent annual growth rate in the US paramedic field has been 4%, Latino and African American men have been significantly underrepresented in the field compared to their proportion in the US population at large. This problem threatens both the quality and quantity of available emergency health care. The purpose of this study was to describe how men of color (MOC) in community college paramedical programs experienced their awareness, interest, and proactive choice of paramedicine as a course of study. Using a qualitative phenomenological approach and social cognitive career theory as a theoretical framework, I interviewed 23 MOC enrolled during one semester across three community college paramedical programs in the southwestern US: 9 Latino and 14 African American, aged 18-29 with mean age 22 years. The focus of the interviews was the participants' lived experiences at various career points, as well as the enablers and disablers they had encountered. I identified three primary themes for possible use in enhancing recruitment of MOC to the paramedic field: strategic use of new digital media, promotion of the vocation's quasi-familial characteristics, and augmentation of neighborhood-based outreach. Identified areas for further research included recruitment dynamics of female paramedics, MOC persistence issues, and MOC …

The purpose of this study was to ascertain student and teacher perceptions of the environment in which student learning takes place and their perceptions of how it has helped them in the cognitive and social domains. Data collected were through student and teacher perception surveys, student and teacher perception questionnaires, classroom observations, student focus group discussions, and teacher interviews. Themes that emerged from the data sources were student interactions, students' autonomy in personalizing their learning space, teacher perceptions of comfort in the classroom, and student perceptions of comfort in the classroom. The findings of this study point to four recommendations for educational leaders to ensure the effective implementation of new and dynamic learning spaces: (1) consult and support teacher and students, (2) provide professional development, (3) visit campuses and other learning spaces, and (4) add color. In order for real change to take place, teachers need to enquire about and embrace student preferences and allow for the discomfort that will be present when trying something new. Teachers must be willing to relinquish control of the learning experience for the student in order to allow for possibilities in personalized learning on the part of the student. They must risk initial failure …

Given the diversity found in today's Japanese culture and the size of the country's population, it is easy to see why the understanding of Japanese wind band repertoire must be multi-faceted. Alongside Western elements, many Japanese composers have intentionally sought to maintain their cultural identity through the addition of Japanese musical elements or concepts. These added elements provide a historical and cultural context from which to frame a composition or, in some cases, a composer's compositional output. The employment of these elements serve as a means to categorize the Japanese wind band repertoire. In his studies on cultural identities found in Japanese music, Gordon Matthews suggests there are three genres found within Japanese culture. He explains these as "senses of 'Japaneseness' among Japanese musicians." They include Fence, Flavor, and Phantasm. Bringing a new perspective to the idea of Japanese influence, I trace the implementation of these facets of Japanese music through the wind band music of Japanese composers. I demonstrate that Japanese wind band genres are the result of a combination of Japanese musical elements and Western influence and argue that the varying levels of this combination, balanced with historical and cultural context, create three distinct genres within the Japanese …

The Abraham Solvation Parameter Model (ASPM) is a linear, free-energy relationship that can be used to predict various solute properties based on solute-solvent interactions. The ASPM has been used to predict log (K or Cs,organic/Cs,gas) values, as well as log (P or Cs,organic/Cs,water) values for solute transfer into the following organic solvents: 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-isopropoxyethanol and 2-butoxyethanol. The derived log (K or Cs,organic/Cs,gas) correlations describe the experimental data to within 0.14 log units (or less). The derived log (P or Cs,organic/Cs,water) correlations describe the experimental data to within 0.16 log units (or less). The ASPM has also been used to predict the enthalpies of solvation of organic solutes dissolved in the following solvents: acetic acid, dimethyl carbonate, diethyl carbonate, 1-butanol, 1-pentanol, 1-hexanol. The derived enthalpy of solvation correlations, using the L solute descriptor, describe the experimental data to within 2.50 log units (or less). The derived enthalpy of solvation correlations, using the V solute descriptor, describe the experimental data to within 3.10 log units (or less). Validation analyses have been performed on several of the correlations; and, as long as the solute descriptors fall within the given ranges as reported, the original correlations show good predictive ability for determining …

Genomic integrity is important for living cells' correct functioning and propagation. Deoxyribonucleic acid as a molecule is a subject to chemical reactions with agents that can come from environment as well as from internal metabolism processes. These reactions can induce damage to DNA and thus compromise the genetic information, and result in disease and death of an organism. To mitigate the damage to DNA, cells have evolved to have multiple DNA repair pathways. Presented here is a computational study of DNA repair genes. The structure of the Homo sapiens direct DNA repair gene ALKBH1 is predicted utilizing homology modeling methods and using AlkB and DBL proteins as templates. Analysis of the obtained structure and molecular dynamics simulations give insights into potentially functionally important residues of the protein. In particular, zinc finger domains are predicted, and lysines that could perform catalytic activities are investigated. Subsequent mutagenesis experiments revealed the effect of the residues predicted to form zinc fingers on activity of ALKBH1. Structure and dynamics of AlkD, a Bascillus cereus base excision DNA repair protein is also studied. This protein has been shown to bind DNA with large alkyl adducts and perform excision catalysis without base flipping which is characteristic to …

Biological emergency response planning plays a critical role in protecting the public from possible devastating results of sudden disease outbreaks. These plans describe the distribution of medical countermeasures across a region using limited resources within a restricted time window. Thus, the ability to determine that such a plan will be feasible, i.e. successfully provide service to affected populations within the time limit, is crucial. Many of the current efforts to validate plans are in the form of live drills and training, but those may not test plan activation at the appropriate scale or with sufficient numbers of participants. Thus, this necessitates the use of computational resources to aid emergency managers and planners in developing and evaluating plans before they must be used. Current emergency response plan generation software packages such as RE-PLAN or RealOpt, provide rate-based validation analyses. However, these types of analysis may neglect details of real-world traffic dynamics. Therefore, this dissertation presents Validating Emergency Response Plan Execution Through Simulation (VERPETS), a novel, computational system for the agent-based simulation of biological emergency response plan activation. This system converts raw road network, population distribution, and emergency response plan data into a format suitable for simulation, and then performs these simulations …

This exploratory, mixed-methods study investigated the relationship between information literacy and critical thinking. The research question guiding the first portion of the study was: How do information literacy and critical thinking relate in undergraduate students conducting academic research? Using two standardized assessments, the study assessed the information literacy and critical thinking skills of a small population of college students from a private, university in Texas. The correlational analysis of the scores from the two assessments showed a statistically significant, positive, moderate correlation. The study also explored the likelihood of gender differences in cognitive processing using information literacy and critical think skills assessments. The independent samples t-tests for both assessments demonstrated no statistically significant differences between female and male participants. Finally, a qualitative component comprised of a questionnaire provided context to the assessment scores through items requesting information on participant source selection priorities via the three middle stages of Kuhlthau's information search process model as well as their criteria for selecting sources of information. Though only a small number of the participants completed the questionnaire, the responses highlighted areas of interest for future research.

The non-resonant bounded uniserial representations of Vec(R) form a certain class of extensions composed of tensor density modules, all of whose subquotients are indecomposable. The problem of classifying the extensions with a given composition series is reduced via cohomological methods to computing the solution of a certain system of polynomial equations in several variables derived from the cup equations for the extension. Using this method, we classify all non-resonant bounded uniserial extensions of Vec(R) up to length 6. Beyond this length, all such extensions appear to arise as subquotients of extensions of arbitrary length, many of which are explained by the psuedodifferential operator modules. Others are explained by a wedge construction and by the pseudodifferential operator cocycle discovered by Khesin and Kravchenko.

In 1980 Feigin and Fuchs classified the length 2 bounded representations of Vec(R), the Lie algebra of polynomial vector fields on the line, as a result of their work on the cohomology of Vec(R). This dissertation is concerned mainly with the uniserial (completely indecomposable) representations of Vec(R) with a single Casimir eigenvalue and weights bounded below. Such representations are composed of irreducible representations with semisimple Euler operator action, bounded weight space dimensions, and weights bounded below. These are known to be the tensor density modules with lowest weight λ, for any non-zero complex number λ, and the trivial module C, with Vec(R) actions π_λ and π_C, respectively. Our proofs are cohomology arguments involving the first cohomology groups of Vec(R) with values in the space of homomorphisms between two irreducible representations. These results classify the finite length uniserial extensions, with a single Casimir eigenvalue, of admissible irreducible Vec(R) representations with weights bounded below. In almost every case there is at most one uniserial representation with a given composition series. However, in the case of an odd length extension with composition series {π_1,π_C,π_1,…,π_C,π_1}, there is a one-parameter family of extensions. We also give preliminary results on uniserial representations of the Virasoro Lie …

The objective of this dissertation is to review the discrepancies between Concert Sans Orchestre and Grande Sonate edited by Ernst Herttrich, Grosse Sonate No.3 Op.14 Erste and Zweite Ausgabe edited by Clara Schumann of Robert Schumann's No.3 Op.14, providing assistance for performers by clarifying inconsistencies between the three editions. Information in reference to major aspects such as notes, rhythms, metronome marking and expression signs is presented. Examples of discrepancies found throughout the first movement are discussed in Chapter 3. Suggested solutions are followed by each example.

Opera concert performed at the UNT College of Music Lyric Theater.

Ensemble concert presented at the UNT College of Music Winspear Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree for both Joshua R. Brown -- conducting the UNT Men's Chorus -- and Charlotte Botha, conducting the UNT Women's Chorus.

Concert performed at the UNT College of Music Winspear Hall, as well as recitals presented in partial fulfillment of the Doctor of Musical Arts (DMA) degree for both Charlotte Botha (conducting the UNT Women's Chorus) and Gideon Burrows (conducting the UNT Men's Chorus).

Choral concert performed at the UNT College of Music Winspear Hall, featuring Charlotte Botha (conducting) in partial fulfillment of the Doctor of Musical Arts (DMA) degree.

According to a recent United Nations report, China's population of 1.4 billion represents 19% of the world's entire population of 7.6 billion. As the distance between east and west contracts in business, so too do the arts. This dissertation focuses on six selected contemporary Chinese art songs composed by Nan-Chang Chien. By providing the references of musical facts, synopsis of the poems, word-for-word translation, IPA transcription, poetic translation, and interpretive and performance guides, singers and pianists will have an overall understanding and detailed directions for learning the Chinese language and Chinese art songs. This dissertation also provides the foundation and model for further exploration and research into Chinese art sing literature by scholars in the west.

NiTi-based shape memory alloys (SMAs) offer a good combination of high-strength, ductility, corrosion resistance, and biocompatibility that has served them well and attracted the attention of many researchers and industries. The alloys unique thermo-mechanical ability to recover their initial shape after relatively large deformations by heating or upon unloading due to a characteristic reversible phase transformation makes them useful as damping devices, solid state actuators, couplings, etc. However, there is a need to increase the temperature of the characteristic phase transformation above 150 °C, especially in the aerospace industry where high temperatures are often seen. Prior researchers have shown that adding ternary elements (Pt, Pd, Au, Hf and Zr) to NiTi can increase transformation temperatures but most of these additions are extremely expensive, creating a need to produce cost-effective high temperature shape memory alloys (HTSMAs). Thus, the main objective of this research is to examine the relatively unstudied NiTiZr system for the ability to produce a cost effective and formable HTSMA. Transformation temperatures, precipitation paths, processability, and high-temperature oxidation are examined, specifically using high energy X-ray Diffraction (XRD) measurements, in NiTi-20 at.% Zr. This is followed by an in situ XRD study of the phase growth kinetics of the favorable …

This qualitative case study examined the effect of PLCs on teacher self-efficacy, and whether the type of PLC structure on each campus affected efficacy. The overarching research question that guided the study was, to what extent does perceived teacher self-efficacy change as a result of the practice of PLCs? Participants were selected using purposive and convenience sampling. Ten teachers and two principals on two different campuses participated in teacher focus groups and one-on-one principal interviews, respectively. The available literature on the topics of professional development, professional learning, teacher collaboration, and teacher self-efficacy yielded the discovery that collaborative practices can be used to improve a school and/or district or used to enhance positive practices that already occur. This study adds to the body of research as it develops the area of teacher efficacy and influence of PLCs. Using the coding software, NVivo, focus group data were coded into themes and further comparisons were made with categories derived and saturated until conclusions were drawn. The data show teacher self-efficacy increases as a result of PLCs when teachers are able to experience positive feedback from teammates, shared leadership, trust and honesty, and a freedom to fail. For those teachers who are not on …

The purpose of this research was to explore how the personal and professional experiences of school leaders strengthened or hindered their ability to engage in social justice leadership to advance educational equity and encourage culturally proficient practices in their schools. I employed a descriptive multi-case study and the research was viewed through a conceptual framework that included social justice, equity, and the five elements of cultural proficiency. Five principals from three different school districts were selected as participants. They represented elementary, middle and high schools. Interviews consisted of semi-structured face to face interviews with each principal participant and one focus group interview with five participants. Each participant also provided a cultural autobiography. Findings revealed while principals may care deeply about providing equitable opportunities for students, the interest does not supplement knowledge, skills, experience, and support. The information gained from this study can inform the practice of school leaders, and the way in which districts and programs of educational leadership prepare school leaders to serve and address the needs of all students as public schools become more culturally diverse.

The aging experience of men and women in rural America is different than that of their urban counterparts. In this study, I identified key disparities in access to health care, mortality, and utilization of health care that result from geographic location. Foundational theories are discussed to illustrate that disparities can originate from historical societal behaviors. Secondary data and literary reviews create a combined qualitative and quantitative approach to explore the rural/urban divide, concluding that the potential for increased disparities as the aging population grows is very real and rural residents remain vulnerable to a poor(er) aging experience. Recommendations for policy and practice, as well as additional research, are made to address the conclusion.

John Ireland is one of the most important British composers of the twentieth century. Many scholars believe the works of his early period were deeply influenced by Brahms. After graduating from the Royal College of Music, Ireland went on to develop a much more individual musical language, with influence from contemporary French composers. However, the young composer found himself confronted with the challenge of finding a new and personal style without turning wholly to impressionism or to chromaticism. In Ireland's Piano Sonata, Ireland adopted several of Brahms' compositional techniques. This piano sonata is an excellent example of one of Ireland's mature works that still demonstrates Brahms' influence.

For decades, urban public schools have been plagued by systemic and structural challenges that continue today. Scholars, policymakers, and the general public have pointed to problems of learning in urban schools and to low expectations for urban students' learning, but little attention has been given to how urban students themselves conceptualize learning. This study sought to fill the void by asking a group of urban students about their views of learning. A phenomenographic approach was employed to examine the qualitatively different ways in which 20 urban elementary fifth-grade students expressed their conceptions of learning and of their learning approaches. Consistent with phenomenography, the study was intended to understand the collective expressions of individuals' conceptions regarding a phenomenon, and emphasis was on the mapping of variation across the conceptions. Semi-structured interviews with open-ended questions, conducted individually, elicited the students' conceptions of the meaning of learning and their learning approaches. In a "search for meaning" approach, analyses were based on students' transcribed responses forming a pool of quotations. These quotations were divided first into "what" and "how" categories—"what" is learning and "how" does learning occur—and then into subcategories. The results were a set of categories organized in a two-level hierarchy. The three …

The recent breakthroughs in the research of brain trauma as it relates to athletics has revealed never before seen damage linked with football participation. Known as chronic traumatic encephalopathy (CTE), it is caused by activities inherent to the sport of football. School sponsored football has been granted immunity through case law and legislation in Texas. Recent research however indicates a different type of injury than those that school districts have been protected of liability from. This will provide a challenge to the immunity school districts have enjoyed regarding football. One route to abrogation of immunity is the state created danger provision established by the Supreme Court. The Fifth Circuit Court whose jurisdiction includes Texas has yet to officially adopt the state created danger theory. This research examined legal precedent to determine the challenge CTE may present the various layers of immunity surrounding school sponsored football in Texas.