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 Collection: UNT Theses and Dissertations
Measurement and Utility of Functional Behavioral Assessments and Behavior Intervention Plans in Classrooms for Students with Emotional and Behavioral Disorders
This research study examined how education service providers conduct functional behavioral assessments and utilize behavior intervention plans to address the social and emotional needs of students with challenging behaviors. The data are based on a 20-item survey administered to educators who identified themselves as working with students diagnosed with emotional and behavioral disorders. The results and implications of the survey are discussed and evaluated to the review of literature conducted prior to the study. Recommendations for future research are also explored. digital.library.unt.edu/ark:/67531/metadc5469/
Timing and Congestion Driven Algorithms for FPGA Placement
Placement is one of the most important steps in physical design for VLSI circuits. For field programmable gate arrays (FPGAs), the placement step determines the location of each logic block. I present novel timing and congestion driven placement algorithms for FPGAs with minimal runtime overhead. By predicting the post-routing timing-critical edges and estimating congestion accurately, this algorithm is able to simultaneously reduce the critical path delay and the minimum number of routing tracks. The core of the algorithm consists of a criticality-history record of connection edges and a congestion map. This approach is applied to the 20 largest Microelectronics Center of North Carolina (MCNC) benchmark circuits. Experimental results show that compared with the state-of-the-art FPGA place and route package, the Versatile Place and Route (VPR) suite, this algorithm yields an average of 8.1% reduction (maximum 30.5%) in the critical path delay and 5% reduction in channel width. Meanwhile, the average runtime of the algorithm is only 2.3X as of VPR. digital.library.unt.edu/ark:/67531/metadc5423/
Descriptive Analysis of the Association for the Study of Higher Education Dissertation of the Year Award Winning Dissertation and Recipients, 1979 - 2004
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This mixed-methodology study examined a set of award winning dissertations to determine what factors may have led to their receiving recognition by the Association for the Study of Higher Education (ASHE). The study addressed seven specific research questions which were answered via two different research designs: 1) a survey administered to the 27 recipients of the dissertation award, and 2) through the qualitative assessment of a sample of the winning dissertations. The quantitative survey was distributed to recipients of the Association for the Study of Higher Education Dissertation of the Year award from 1979 through 2004. The survey collected specific information on the personal attributes and characteristics of the award recipients, descriptive information about the award winning dissertations, information concerning the quality of the winner's doctoral experiences, the quality of their relationship with their dissertations advisors and the progression of their careers after winning the award. The qualitative assessment involved applying a set of evaluative questions provided by Gall, Gall and Borg to describe a sample of the award winning documents. The results indicated that recipients of the ASHE award were not representative of education doctoral students as indicated by 2004 data. The results of the study also indicated that, as a group, these dissertations winners were full-time doctoral students, likely recipients of some form of financial assistance (assistantship and fellowships) and were able to complete their dissertations and degrees in substantially less time than typical education doctoral students. The findings also suggest that Gall, Gall and Borg's procedure for evaluating educational research can be used to assess doctoral dissertations. digital.library.unt.edu/ark:/67531/metadc5400/
A Tuscan Lawyer, His Farms and His Family: The Ledger of Andrea di Gherardo Casoli, 1387-1412
This is a study of a ledger written by Andrea di Gherardo Casoli between the years 1387 and 1412. Andrea was a lawyer in the Tuscan city of Arezzo, shortly after the city lost its sovereignty to the expanding Florentine state. While Andrea associated his identity with his legal practice, he engaged in many other, diverse enterprises, such as wine making, livestock commerce, and agricultural management. This thesis systematically examines each major facet of Andrea's life, with a detailed assessment of his involvement in rural commerce. Andrea's actions revolved around a central theme of maintaining and expanding the fortunes, both financial and social, of the Casoli family. digital.library.unt.edu/ark:/67531/metadc11041/
The Sacred and the Profane: Nin, Barnes, and the Aesthetics of Amorality
Barnes's Vagaries Malicieux, and Nin's Delta of Venus, are examples the developing vision of female sex, and both authors use their literary techniques to accomplish their aesthetic vision of amorality. Nin's visions are based on her and her friends' extreme experiences. Her primary concern was expressing her erotic and amorally aesthetic gaze, and the results of her efforts are found in her aesthetic vision of Paris and the amoral lifestyle. Barnes uses metaphor and linguistics to fashion her aesthetic vision. Her technique in "Run, Girls, Run!" both subverts any sense of morality, and offers an interesting and challenging read for its audience. In "Vagaries Malicieux" Barnes's Paris is dark while bright, and creates a sense of nothingness, indicated only by Barnes's aesthetic appreciation. digital.library.unt.edu/ark:/67531/metadc11047/
Correlates of Texas Standard AP Charter Campuses and How They Compare with Standard AP Traditional Public Campuses
The research sought to objectively evaluate the effectiveness of Texas standard AP open-enrollment charter school campuses and to discover independent variables that may be utilized to predict effective charter school campuses. The literature review was designed to enhance the current understanding of charter schools and therefore facilitate a more effective evaluation of them. A basic knowledge and understanding of the origins, characteristics and purposes of charters allow for a more objective analysis. The literature review covered the history of charters including their founders, characteristics, and growth patterns. The data items used in the analyses were downloaded from the 2007-2008 Academic Excellence Indicator System (AEIS), which contains a variety of data from all Texas public schools. Multiple statistical analyses were utilized including chi-square, ANOVA, multiple regression and discriminate analysis. In order to evaluate Texas standard AP open enrollment charter campuses, their accountability ratings were compared with those of standard AP traditional public school campuses. The research evaluated twelve independent variables for charter schools to determine their relationship to accountability ratings, thereby providing charter operators indicators or predictors of accountability ratings to facilitate better academic quality. By analyzing the same variables for traditional public schools as charter schools, a baseline model was developed to compare the similarities and differences with the results of the charter school analyses. digital.library.unt.edu/ark:/67531/metadc11042/
Always Painting the Future: Utopian Desire and the Women's Movement in Selected Works by United States Female Writers at the Turn of the Twentieth Century
This study explores six utopias by female authors written at the turn of the twentieth century: Mary Bradley Lane's Mizora (1881), Alice Ilgenfritz Jones and Ella Merchant's Unveiling Parallel (1893), Eloise O. Richberg's Reinstern (1900), Lena J. Fry's Other Worlds (1905), Charlotte Perkins Gilman's Herland (1915), and Martha Bensley Bruère's Mildred Carver, USA (1919). While the right to vote had become the central, most important point of the movement, women were concerned with many other issues affecting their lives. Positioned within the context of the late nineteenth century women's rights movement, this study examines these "sideline" concerns of the movement such as home and gender-determined spheres, motherhood, work, marriage, independence, and self-sufficiency and relates them to the transforming character of female identity at the time. The study focuses primarily on analyzing the expression of female historical desire through utopian genre and on explicating the contradictory nature of utopian production. digital.library.unt.edu/ark:/67531/metadc11060/
Characterizing Storm Water Runoff from Natural Gas Well Sites in Denton County, Texas
In order to better understand runoff characteristics from natural gas well sites in north central Texas, the City of Denton, with assistance through an EPA funded 104b3 Water Quality Cooperative Agreement, monitored storm water runoff from local natural gas well sites. Storm water runoff was found to contain high concentrations of total suspended solids (TSS). Observed TSS concentrations resulted in sediment loading rates that are similar to those observed from typical construction activities. Petroleum hydrocarbons, in contrast, were rarely detected in runoff samples. Heavy metals were detected in concentrations similar to those observed in typical urban runoff. However, the concentrations observed at the gas well sites were higher than those measured at nearby reference sites. Storm water runoff data collected from these sites were used to evaluate the effectiveness of the water erosion prediction project (WEPP) model for predicting runoff and sediment from these sites. Runoff and sediment predictions were adequate; however, rainfall simulation experiments were used to further characterize the portion of the site where drilling and extraction operations are performed, referred to as the "pad site." These experiments were used to develop specific pad site erosion parameters for the WEPP model. Finally, version 2 of the revised universal soil loss equation (RUSLE 2.0) was used to evaluate the efficiency of best management practices (BMPs) for natural gas well sites. BMP efficiency ratings, which ranged from 52 to 93%, were also evaluated in the context of site management goals and implementation cost, demonstrating a practical approach for managing soil loss and understanding the importance of selecting appropriate site-specific BMPs. digital.library.unt.edu/ark:/67531/metadc11064/
Correlates of a Past Behavior Interview for the Business Unit Leader: Experience, Motivation, Personality and Cognitive Ability
This research evaluates the relationship between various individual differences constructs and performance on a past behavior interview (PBI)-one of the most popular forms of personnel selection interviews used today-within a sample of business unit leader level incumbents and applicants from organizations across the United States. Correlation analysis is conducted on the relationship between overall performance on a PBI and four work-related constructs: Experience, Motivation, Personality, and Cognitive Ability. The existing literature on PBIs and the four independent variables is critically reviewed. As limited research has been conducted on the influence of Experience and Motivation on PBI performance, this study makes unique contributions to the literature regarding impact of these two constructs. The major hypotheses stated that Experience and Motivation would yield significant, positive correlations with PBI performance while Personality and Cognitive Ability would not be significantly correlated with PBIs. Results partially supported the hypotheses-Experience, Motivation, and Personality were significantly related to overall PBI score, while Cognitive Ability was not. Implications for the findings as well as suggestions for future research are discussed. digital.library.unt.edu/ark:/67531/metadc11066/
An investigation of factors affecting Omani faculty members' adoption of information and computing technology.
The purpose of this study was to explore the factors influencing information and computing technology (ICT) adoption for Omani faculty members from a framework of Rogers' theory of diffusion of innovation. Three hundred Omani faculty members from Sultan Qaboos University (SQU) participated in the study. The survey consisted of five parts: (a) an 18-item questionnaire on ICT uses and skills, (b) a 1-item questionnaire on adopter category, (c) a 44-item self-constructed questionnaire on perception of barriers to adopting ICT, (d) a 50-item questionnaire on ICT attributes adapted from Moore and Benbasat, and (e) a 15-item questionnaire on demographic and job-related variables. Descriptive statistics indicated that the faculty members overall used ICT at the "Sometimes" level and had ICT skills at the "Intermediate" level. The most frequently used and skillful ICT functional areas were Website browsing, Internet search engine, and word processing. One-way ANOVAs found significant group differences of ICT uses and skills, perception of barriers, and perception of ICT attributes in the category of adopter. Early adopters used ICT more, had higher ICT skills, perceived fewer barriers in the adopting process, and recognized higher values of ICT attributes than later adopters did. Multiple regression analysis showed the level of ICT uses could be predicted by ICT skills, adopter category, perception of barriers, ICT attributes, and the selected demographic and job-rated background variables, to a large magnitude with an adjusted R2 value of .70. The level of ICT skills was the most salient predictor. Perception of ICT attributes and the number of traditional classes taught appeared to be important as well. Results supported Rogers' theory at the macro level but not at the micro level. digital.library.unt.edu/ark:/67531/metadc11063/
The War for Peace: George H. W. Bush and Palestine, 1989-1992
The administration of President George H. W. Bush from 1989 to 1992 saw several firsts in both American foreign policy towards the Middle East, and in the Palestinian-Israeli conflict. At the beginning of the Bush Presidency, the intifada was raging in the West Bank and Gaza Strip, and by the time it was over negotiations were already in progress for the most comprehensive agreement brokered in the history of the conflict to that point, the Oslo Accords. This paper will serve two purposes. First, it will delineate the relationships between the players in the Middle East and President Bush during the first year of his presidency. It will also explore his foreign policy towards the Middle East, and argue that it was the efforts of George H. W. Bush, and his diplomatic team that enabled the signing of the historic agreement at Oslo. digital.library.unt.edu/ark:/67531/metadc11061/
Exploring Thai EFL University Students' Awareness of Their Knowledge, Use, and Control of Strategies in Reading and Writing
The purpose of this research was to conduct case studies to explore and describe Thai university students' awareness and application of cognitive and metacognitive strategies when reading and writing in English-as-a-foreign-language (EFL). Four participants, including two high and two low English language proficiency learners, were selected from 14 students enrolled in a five-week course called English for Social Sciences offered at Kasetsart University in Bangkok, Thailand in 2005. The major sources of data for the analyses included the transcripts of the participants' pair discussions, think-aloud protocols, interviews, and daily journal entries. In addition, field work observations, reading and writing strategy checklists, participants' written work, and the comparison of the pretest and posttest results were also instrumental to the analyses. The interpretive approach of content analysis was employed for these four case studies. Findings were initially derived from the single-case analyses, and then from cross-case analyses. Major findings revealed that strategic knowledge enhanced these English-as-a-foreign- language (EFL) learners' proficiency in English reading and writing. However, applying elaborative strategies for higher-level reading was challenging for most of the participants. Two crucial factors that impeded their development were the learners' uncertain procedural and conditional knowledge of strategy uses and their limited English language proficiency due to limited exposure to the second language (L2). The teacher's explanations and modeling of strategies, the participants' opportunities to discuss strategy use with peers, and extensive practice positively enhanced their development. Additionally, the learners' schema and knowledge of text structures played significant roles in their development of the two skills. These English-as-a-foreign-language (EFL) learners also developed metacognitive awareness and strategy applications, but not to the level that always enhanced effective regulation and control of their reading and writing behaviors. Combining reading and writing in English-as-a-foreign-language (EFL) instruction promoted the learners' awareness of the relationships of certain strategies for the two skills, and developed their literacy skills holistically. digital.library.unt.edu/ark:/67531/metadc5429/
The Effects of Labeling and Stigma on the Social Rejection of Striptease Performers
This study uses survey data collected from a convenience sample of undergraduate students (N=89). A vignette survey design is employed to measure social rejection of striptease performers compared to a control group. Data is also collected on negative stereotypes held about striptease performers, which are correlated with social rejection. Link and Phelan's conceptualization of the stigma process provides the theoretical framework for this analysis. Findings suggest that striptease performers experience higher levels of social rejection and are perceived more negatively than the control group and that endorsement of negative stereotypes is associated with social rejection. digital.library.unt.edu/ark:/67531/metadc5466/
An empirical investigation of manufacturing flexibility and organizational performance as moderated by strategic integration and organizational infrastructure.
The purpose of this study is empirically investigating four research questions related to manufacturing flexibility. 1) What are the components of manufacturing flexibility? 2) Is there a relationship between manufacturing flexibility and organizational performance? 3) Do integrated strategies strengthen the relationship between manufacturing flexibility and organizational performance? 4) Are there organizational characteristics that strengthen the relationship between manufacturing flexibility and organizational performance? This study used a cross-sectional survey design to collect data from manufacturing organizations in multiple industries. Organizational performance was quantified using common manufacturing measures. Strategic integration and organizational infrastructure were also measured. Data were collected using a self-administered questionnaire. Factor analysis, correlation analysis, and regression were used to analyze the data. The results indicate the variables and expected relationships exist as hypothesized. This study contributes to the manufacturing flexibility body of knowledge by identifying relationships between the manufacturing flexibility component, performance, strategic integration, and organizational infrastructure. The instrument development in this study is of particular value as there are few rigorously developed and validated instruments to measure the manufacturing flexibility components and performance. Understanding these relationships will help practitioners make better decisions in manufacturing organizations as well as enable application of the concepts in this study to other contexts such as service organizations. digital.library.unt.edu/ark:/67531/metadc11065/
Between the Waves: Truth-Telling, Feminism, and Silence in the Modernist Era Poetics of Laura Riding Jackson and Muriel Rukeyser
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This paper presents the lives and early feminist works of two modernist era poets, Laura Riding Jackson and Muriel Rukeyser. Despite differences of style, the two poets shared a common theme of essentialist feminism before its popularization by 1950s and 60s second wave feminists. The two poets also endured periods of poetic silence or self censorship which can be attributed to modernism, McCarthyism, and rising conservatism. Analysis of their poems helps to remedy their exclusion from the common canon. digital.library.unt.edu/ark:/67531/metadc5419/
It's a Different World: Gender Variations in the Satisfaction of African American College Students
The purpose of this research study was to explore gender variances in the satisfaction levels of African American students at UNT toward the goal of increasing the retention of these students. Variances in satisfaction levels were measured using information obtained from African American students that participated in the fall 2004 administration of the Noel Levitz Student Satisfaction Inventory (SSI). In addition, the UNT Customer Satisfaction Survey (UNT-CSS), which applies Hom's Basic Model of Customer Satisfaction, was used to further examine areas of interest identified by the Noel Levitz SSI. Analysis of the SSI data indicated that no statistical significance existed amongst any of the correlates of satisfaction as a function of gender. In fact, African American students appeared to have very similar ideas on what services were important to them and on how satisfied they were with the services provided to them by the university. African American males and females were most satisfied with Campus Support Services, Academic Advising/Counseling, and Instructional Effectiveness at UNT. The UNT-CSS further examined the above areas. African American males and females were measured against each other to discern if differences occur in how African American students process the customer service model as a function of gender. African American males demonstrated strong positive correlations between their expectation of customer service and their consequent evaluation of that service. African American females were more influenced by their perception of the service received. digital.library.unt.edu/ark:/67531/metadc5487/
The impact of child teacher relationship training on teachers' and aides' use of relationship-building skills and the effect on student classroom behavior.
This study examined the impact of child teacher relationship training (CTRT) on teachers' and aides' use of relationship- building skills in the classroom and the correlation between teachers' and aides' demonstration of relationship- building skills and the effect on student behavior. CTRT was modeled after Landreth and Bratton's (2006) 10-session filial therapy model titled child parent relationship therapy (CPRT) which is based on the principles and procedures of child -centered play therapy. The CPRT manual was adapted slightly for use with teachers and aides for this project. In this quasi-experimental design, 12 teacher aide dyads (n = 24) were assigned to the experimental (n = 12) or active control groups (n = 12). Children who scored in the Borderline/Clinical range on at least one scale of the Child Behavior Checklist-Caregiver/Teacher Report Form (C-TRF) at pretest qualified for the study (N = 32). During the first phase of treatment, teachers and aides participated in the equivalent of 10 training/supervision sessions consistent with the principles and procedures of CPRT. During CTRT Phase II, teachers and aides participated in 10 weeks of coaching/modeling to facilitate the use of CTRT skills in the classroom environment and continued to participate in weekly 1-hour group training/supervision sessions. Eight hypotheses were analyzed. Different analyses were conducted based on the hypotheses. Analyses of covariance and repeated measures analysis of variance were conducted. Correlation coefficients were also calculated. Additionally, effect sizes were calculated to determine practical significance. Two hypotheses were retained at the .05 level of significance. Children in the experimental group (n = 19) demonstrated a significant decrease (p = .04) in Externalizing Problems between Measurements 1 and 3 when compared to the children in the active control group (n = 13). A statistically significant relationship was found between teachers' and aides' higher use of relationship-building skills and students' decrease in externalizing behaviors (p < .05). No statistically significant results were found on the remaining hypotheses. digital.library.unt.edu/ark:/67531/metadc5457/
Beethoven's Opus 18 String Quartets: Selected First Movements in Consideration of the Formal Theories of Heinrich Koch as Expressed in Versuch Einer Anleitung Zur Composition
Heinrich Koch completed his treatise in 1793, a pioneering work regarding the musical phrase as well as a sonata form description (lacking that term). Composition of Opus 18 began in 1798, a momentous project for several reasons in Beethoven's early career. Here, the theories expressed in Koch's Versuch are taken as an analytic springboard into a thorough analysis of the first movement of the quartet published no. 3, which was the first composed; additionally, nos. 1 and 6 are explored to a lesser degree. This study in phrase-analysis demonstrates significance in the fundamental ideas of Koch as applied to a masterwork of the turn of the 19th century. digital.library.unt.edu/ark:/67531/metadc5427/
Knowledge Management and Law Enforcement: An Examination of Knowledge Management Strategies of the Police Information System (POLNET) in the Turkish National Police
This research study explores knowledge management (KM) in law enforcement, focusing on the POLNET system established by the Turkish National Police as a knowledge-sharing tool. This study employs a qualitative case study for exploratory and descriptive purposes. The qualitative data set came from semi-structured face-to-face and telephone interviews, as well as self-administered e-mail questionnaires. The sample was composed of police administrators who created POLNET, working under the Department of Information Technologies and the Department of Communication. A content analysis method is used to analyze the data. This study finds that law enforcement organizations' KM strategies have several differences from Handzic and Zhou's integrated KM model. Especially, organizational culture and structure of law enforcement agencies differently affect knowledge creation, conversion, retrieval, and sharing processes. Accordingly, this study offers a new model which is dynamic and suggests that outcomes always affect drivers. digital.library.unt.edu/ark:/67531/metadc11040/
Commercial Motor Vehicle Driver Safety: An Application of Ethics Theory
Safety is an important aspect of ethical, socially responsible logistics. Current U.S. motor carrier (MC) safety research topical coverage includes the effects of individual and environmental influences, carrier safety management, and regulatory compliance on carrier safety and driver fatigue/safety performance. Interestingly, little research on the subject of truck drivers' safety attitudes and behaviors exists and the underlying decision-making processes that guide drivers' safety-related behaviors have received little attention. Furthermore, researchers have not provided an integrated framework that explains individual, organizational, and regulatory factors' impact on drivers' safety decision-making and performance. Truck drivers' safety judgments, decisions, and actions must adhere to societal safety norms. To that end, ethical decision-making theory that draws from the deontological and teleological traditions in moral philosophy provides a theoretical foundation and integrated framework necessary to better understand drivers' safety decision-making processes. The current research sought to determine how drivers rely on safety norms and perceived consequences in forming safety judgments and behavioral intentions. Furthermore, the study was designed to explore how various factors (i.e., individual, organizational, and regulatory) influence drivers' safety decision-making processes. Specifically, the study sought to answer the broad question, "How do commercial motor vehicle drivers make safety-related decisions, and how do individual, organizational, and regulatory factors influence drivers' safety decision-making processes?" An experimental two-factor design (2×2) was used to manipulate safety norms (i.e., "deontologically unsafe situation" and "deontologically safe situation") and consequences (i.e., "positive consequences" and "negative consequences"). Multivariate statistical analysis revealed that drivers primarily rely on deontological evaluations in forming safety judgments. Furthermore, drivers primarily relied on safety judgments when forming behavioral intentions. Drivers' attitudes toward unsafe actions and the effectiveness of driver-related safety regulations were also influential to drivers' judgments and intentions, respectively. The empirical findings demonstrate to managers that communication and education of safety norms may be highly effective to improve safety in unique occupational contexts where employees are given high levels of responsibility with little physical supervision, and where judgment errors can have devastating consequences for multiple stakeholders. digital.library.unt.edu/ark:/67531/metadc11048/
Barriers Limiting Access to Hospice Care for Elderly African Americans in Amarillo, Texas
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This study examines barriers limiting access to hospice care for elderly African Americans. Ethnic background plays a critical role in the development of attitudes, beliefs and expectations related to death and issues surrounding hospice care. The purpose of this study was to identify barriers that may limit access to hospice care for African Americans. A questionnaire was administered to 56 elderly African Americans in three religious settings and an African American senior citizens center. The questionnaire was designed to obtain information concerning African Americans' attitudes toward death and dying; religious beliefs; health beliefs; familiarity with hospice and prospective use of hospice. The results of the study indicate a number of barriers in access to hospice care for African Americans including: hospice knowledge barriers; education/outreach barriers; cultural knowledge barriers related to death/dying values; family/social support barriers; hospice organizational/provider barriers; health care organizational/provider barriers; and reimbursement barriers. digital.library.unt.edu/ark:/67531/metadc2855/
Anne Brontë's New Women: Agnes Grey and The Tenant of Wildfell Hall as Precursors of New Woman Fiction
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Anne Brontë's Agnes Grey and The Tenant of Wildfell Hall were published more than forty years before the appearance of the feminist type that the Victorians called the “New Woman;” yet, both novels contain characteristics of New Woman fiction. By considering how Brontë's novels foreshadow New Woman fiction, the reader of these novels can re-enact the “gentlest” Brontë as an influential feminist whose ideology informed the construction of the radical New Woman. Brontë, like the New Woman writers, incorporated autobiographical dilemmas into her fiction. By using her own experiences as a governess, Brontë constructs Agnes Grey's incongruent social status and a morally corrupt gentry and aristocracy through her depiction of not only Agnes's second employers, the Murrays, but also the morally debauched world that Helen enters upon her marriage to Arthur Huntingdon in The Tenant of Wildfell Hall. Moreover, Brontë incorporates her observations of Branwell's alcoholism and her own religious beliefs into The Tenant of Wildfell Hall. Although Brontë's novels contain autobiographical material, her heroines are fictional constructions that she uses to engage her readers with the woman question. Brontë accomplishes this engagement through her heroines' narrative re-enactments of fictional autobiographical dilemmas. Helen's diary and Agnes's diary-based narrative produce the pattern of development of the Bildungsroman and foreshadow the New Woman novelists' Kunstlerromans. Brontë's heroines anticipate the female artist as the protagonist of the New Woman Kunstlerromans. Agnes and Helen both invade the masculine domain of economic motive and are feminists who profess gender definitions that conflict with dominant Victorian ideology. Agnes questions her own femininity by internalizing the governess's status incongruence, and Helen's femininity is questioned by those around her. The paradoxical position of both heroines anticipates the debate about the nature and function of art in which the New Woman writers engaged. Through her reconciliation of the aesthetic and the political, Brontë, like the New Woman novelists who will follow, explores the contradiction between art and activism. digital.library.unt.edu/ark:/67531/metadc2834/
Political Identity of First-Year College Students: An Analysis of Student Characteristics Using Cooperative Institutional Research Program (CIRP) Data
This quantitative study utilized secondary self-reported data from the 2008 administration of the Cooperative Institutional Research Program (CIRP) Freshman Survey from two Texas public universities to investigate the pre-college demographic, academic, attitude, behavioral, and familial factors that may relate to students' self-reported political identities. The study design was correlational regarding the relationship of the demographic, academic, attitude, behavioral, and familial independent variables to the dependent variable of the students' political identities. ANOVA main effects for the independent variables were calculated, and statistical significance required the p < .05 level. The statistically significant demographic factors were native English-speaking status; enrollment status; citizenship status; religious preference; and race. The statistically significant academic factor was intended major. The statistically significant attitude factors were opinions regarding social issues such as criminal rights; abortion rights; the death penalty; the legalization of marijuana; homosexual relationships and same-sex marriage; racial discrimination; income taxes; affirmative action; military spending and voluntary military service; gun control; the environment; national health care; immigration; personal success; political dissent; and free speech. Other statistically significant attitude factors related to personal goals of making artistic and scientific contributions; being politically influential and politically knowledgeable; raising a family; participating in environmental programs and community action programs; developing a life purpose; promoting racial understanding; and promoting cultural understanding. The statistically significant behavioral factors were the frequency with which students participated in activities such as attending religious services; smoking; feeling overwhelmed or depressed; playing a musical instrument; discussing politics; and being involved in political campaigns. Other statistically significant behavioral factors were the frequency with which students participated in critical thinking activities such as using logical arguments to support their opinions; seeking alternative solutions to problems; researching scientific articles; exploring topics of personal interest; and accepting mistakes. The statistically significant familial factors were the religious preferences of the students' fathers and mothers. The results can give insight into the political characteristics of the students with whom student affairs professionals work. They can be used to inform the planning and implementation of educational programs that aid in students' political identity development. digital.library.unt.edu/ark:/67531/metadc28457/
Virulence Factor Production in PyrE Mutants of Pseudomonas Aeruginosa
It has been shown previously in our lab that mutations in the pyrimidine pathway reduced the ability of Pseudomonas aeruginosa to produce virulence factors. Knockout mutations in pyrB, pyrC and pyrD genes of the pyrimidine pathway showed that virulence factor production was decreased. Pyoverdin, pyocyanin, hemolysin, iron chelation, motility, and adherence are all considered virulence factors. Here I further investigate the effects of mutations in the pyrimidine pathway by studying a pyrE mutant. I studied the effect of the pyrE mutation on the production of the above virulence factors. Just like the effect of pyrB, pyrC and pyrD mutations,the pyrE mutation also showed that the bacteria were deficient in producing virulence factors when compared to the wild type. The broader impact of this research would be the possibility of finding drugs that could treat patients infected with P. aeruginosa and possibly extend the lives of chronically infected patients with cystic fibrosis. digital.library.unt.edu/ark:/67531/metadc28458/
The Determinants and Consequences of Empathic Parenting: Testing an Expansion of Belsky's Model of Parenting Using SEM
An understanding of factors that enhance empathic parenting behaviors is of considerable importance to the study of child development and to the development of parenting interventions to promote child adjustment. Moreover, gaining a better understanding of the factors that predict empathic parenting with older children is of interest since most research examining parental empathy focuses on infants. These were the goals of the current study. Guided by Belsky's 1984 process model of the determinants of parenting that impact child development, an expanded model of the determinants of parenting is proposed that includes various parent, child, and contextual factors of influence. Using data from a community sample, a partial least squares path analysis approach was employed to test the model's strength in predicting empathically attuned parenting with children ages 5 to 10 years and, ultimately, the child's psychoemotional functioning. Results support the expanded model; however, a reduced model was found to be superior and revealed unique relationships between the determinants of parenting. Specifically, a parent's psychoemotional functioning and childrearing beliefs and attitudes were found to be critical to the parent's ability to engage in empathic parenting behaviors. Other parent factors such as the parent's developmental history of abuse, maladaptive personality traits, and age, along with contextual factors and child characteristics, were found to influence parenting only indirectly through their impact on the parent's level of psychoemotional distress or childrearing beliefs and attitudes. Ultimately, the current findings support Belsky's claim that parent factors are the strongest predictors of empathic parenting. Implications of these findings are many. The results highlight the importance of assessing a parent's childrearing beliefs and attitudes and level of distress in conjunction with characteristics of the child when a family comes in for treatment. Moreover, the results identify many points of intervention to stopping the cycle of abuse. digital.library.unt.edu/ark:/67531/metadc28454/
A Comparative Analysis of the 1915 and 1919 Versions of Symphony No. 5 in E-flat Major, op. 82 by Jean Sibelius
The initial composition of the Fifth Symphony in E-flat Major, Op. 82 was undertaken as a commission to celebrate the composer's fiftieth birthday. Unhappy with the initial efforts, two revisions were then performed; the first was in 1916 and the final revision in 1919. Despite the larger form of the work seeming to have been changed between the 1915 and 1919 versions, the smaller gestures of thematic expression in both versions remained similar. On the surface, it had appeared that the composer had eliminated a movement, changing the 1919 version into a three movement form. This view was not challenged by the composer at the time, and since the earlier versions had either been withdrawn or destroyed, there was no way to compare the original efforts to the final product until recently. In comparing the 1919 version to the original, a definite strong parallel can be seen between the two - despite the changes to form, rearrangement of melodic material, and the seemingly different number of movements. However, the parallel is enough that the 1915 version can be a guide to classifying the 1919 version, an act that has eluded many scholars since the 1920s. Most importantly, comparing the two versions shows that the 1919 version is not a three movement form at all; it is a four movement form that is obscured by the connection of the first and second movements by a thematic bridge that contains elements from both movements, but is not placed within either structure. digital.library.unt.edu/ark:/67531/metadc28459/
The Effects of Jackpots on Responding and Choice in Two Domestic Dogs
The current study investigated the impact of delivering a jackpot on response rate and response allocation in two domestic dogs. For the purpose of this research, a jackpot was defined as a one-time, within-session increase in the magnitude of reinforcement. Two experiments were conducted to investigate the effects of delivering a jackpot in both single-operant and concurrent schedule procedures. Experiment 1 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response rate in a single-operant procedure. Results of Experiment 1 showed no clear change in response rate after the delivery of the jackpot. Experiment 2 investigated the impact of a one-time, within-session increase in the magnitude of reinforcement on response allocation in a concurrent schedule procedure. Results of Experiment 2 showed an increase in response allocation to the jackpotted contingency in both subjects. These results suggest that a jackpot, as defined here, has no effect in single-operant procedures while having an effect in concurrent schedule procedures. These effects are similar to those reported in the magnitude of reinforcement literature. digital.library.unt.edu/ark:/67531/metadc28456/
Maleic anhydride grafted polypropylene coatings on steel: Adhesion and wear.
Polymeric coatings are being used in a growing number of applications, contributing to protection against weather conditions and localized corrosion, reducing the friction and erosion wear on the substrate. In this study, various polypropylene (PP) coatings were applied onto steel substrates by compression molding. Chemical modification of PP has been performed to increase its adhesion to metallic surfaces by grafting of maleic anhydride (MAH) onto PP in the presence of dicumyl peroxide (DCP). Influence of different concentrations of MAH and DCP on the properties of resulting materials have been examined. The coated steel samples are characterized by scanning electron microscopy (SEM), shear adhesion testing, FTIR and tribometry. The coatings with 3 wt. % MAH have shown the maximum adhesion strength due to maximum amount of grafting. The wear rates increased with increasing the amount of MAH due to simultaneous increase in un-reacted MAH. digital.library.unt.edu/ark:/67531/metadc28452/
An Assessment of Undergraduate Course Syllabi in the Departments of English at Universities in Taiwan
This exploratory, qualitative research explored the extent that course syllabi in the Departments of English in 13 public and 9 private universities in Taiwan reflect the inclusion of syllabus components to promote learning as recommended in the literature in the United States. Research questions included: what components can be inferred from the literature in the U.S. for the recommended components of a course syllabus, for the components for a learning-centered syllabus, and for a model to analyze Bloom's cognitive level of learning? And when these are applied to analyze course syllabi in English courses, are syllabi in these universities congruent with the models? The research identified and analyzed 235 course syllabi from the core courses listed online at these universities. The findings indicated that these syllabi are highly congruent with the syllabus components template; 68% of the syllabi included seven or more of the ten components. Additionally, these syllabi reflect medium congruency with the learning-centered syllabus template. Verbs used in objectives and learning outcomes in different English courses indicate different levels of cognitive learning goals as identified by Bloom's cognitive domain. Additional findings indicate that there was no difference in inclusion of components based on where faculty earned their doctoral degree. This research assumed similarities between higher education in Taiwan and the U.S., conclusions indicate that the course syllabi in Departments of English in Taiwan are congruent with the models recommended in the literature in the U.S. digital.library.unt.edu/ark:/67531/metadc28451/
A Performer's Analysis of Dominick Argento's Miss Havisham's Wedding Night
Dominick Argento's Miss Havisham's Wedding Night is the least explored of his artistic output. A monodrama in one act for soprano, Miss Havisham's Wedding Night contains some of Argento's most beautiful and challenging music of his compositional output. The purpose of a detailed analysis of the structure and content of Argento's Miss Havisham's Wedding Night is to facilitate the solo vocal performer's interpretation. Argento's setting of Miss Havisham's Wedding Night is unique in that he musically translates the manic psychological state of the literary character. Argento structured the one act opera in such a manner that the music would illuminate the text and the audience might connect with the unstable psychological episodes and outbursts demonstrated by Miss Havisham. To that end, each section and phrase has its own psychological motivation, which in turn demands a varied musical and dramatic interpretation. Utilizing selected scenes from Miss Havisham's Wedding Night, the researcher will analyze Argento's musical manifestation of Dickens's literary work. This research will include an investigation into the manner in which Argento uses the shape of melody and the musical phrase along with the harmonic materials to enhance the text and dramatic content. The author will explore the musical nuances Argento incorporates in an effort to develop and portray Miss Havisham's psychological state. Through an analysis of the orchestral writing the author will show how Argento's aesthetic balance between the music and text represents the emotional and psychological implications of the monodrama. digital.library.unt.edu/ark:/67531/metadc28455/
Optimal design of Dutch auctions with discrete bid levels.
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The theory of auction has become an active research area spanning multiple disciplines such as economics, finance, marketing and management science. But a close examination of it reveals that most of the existing studies deal with ascending (i.e., English) auctions in which it is assumed that the bid increments are continuous. There is a clear lack of research on optimal descending (i.e., Dutch) auction design with discrete bid levels. This dissertation aims to fill this void by considering single-unit, open-bid, first price Dutch auctions in which the bid levels are restricted to a finite set of values, the number of bidders may be certain or uncertain, and a secret reserve price may be present or absent. These types of auctions are most attractive for selling products that are perishable (e.g., flowers) or whose value decreases with time (e.g., air flight seats and concert tickets) (Carare and Rothkopf, 2005). I began by conducting a comprehensive survey of the current literature to identify the key dimensions of an auction model. I then zeroed in on the particular combination of parameters that characterize the Dutch auctions of interest. As a significant departure from the traditional methods employed by applied economists and game theorists, a novel approach is taken by formulating the auctioning problem as a constrained mathematical program and applying standard nonlinear optimization techniques to solve it. In each of the basic Dutch auction model and its two extensions, interesting properties possessed by the optimal bid levels and the auctioneer's maximum expected revenue are uncovered. Numerical examples are provided to illustrate the major propositions where appropriate. The superiority of the optimal strategy recommended in this study over two commonly-used heuristic procedures for setting bid levels is also demonstrated both theoretically and empirically. Finally, economic as well as managerial implications of the findings reported in this dissertation research are discussed. digital.library.unt.edu/ark:/67531/metadc28450/
Luke's Mama
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A creative nonfiction thesis, Luke's Mama is a memoir of personal essays that explore how the birth of my son has affected the ways that I relate within and interpret different areas of my life. Chapter I, Introduction, identifies personal and ethical concerns involved in telling my story and explores how others have handled similar issues. Chapter II, Family, illustrates how my relationship with my family of origin has changed since I've become a parent and also how my new family and I interact with society. Chapter III, Calling, depicts my struggle in finding a balance between work and family priorities. Chapter IV, Partner, presents a contrast between my relationship with my partner before and after my son's birth. Chapter V, Parent, displays the beginning of my ever-growing relationship with my son and sense of parenthood. digital.library.unt.edu/ark:/67531/metadc2845/
Identification of highly gifted 5- and 6-year-old children: Measures to predict academic achievement.
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Studies indicate the educational needs of highly gifted students are best met through accelerated learning. It is difficult to recognize very young children that are suited for an accelerated curriculum because younger students frequently lack school records or portfolios used to identify gifted students. This study examined the accuracy of cognitive ability and achievement tests in predicting academic achievement by the end of second grade, correlating test results and final grade averages collected from sixteen children ages five to six who entered a public school program for high-ability learners in kindergarten. A multiple regression analysis indicated the Wechsler Preschool and Primary Scale of Intelligence produced the highest mean IQ score and a strong correlation with reading achievement. The Wechsler Individual Achievement Test contributed in small part to the prediction of academic achievement. The Naglieri Nonverbal Ability Test and the Kaufman Brief Intelligence Test-Second Edition had negative correlations with final grade averages, indicating they are not predictors of academic achievement for these students. digital.library.unt.edu/ark:/67531/metadc28471/
An Analysis of Interrater Agreement Between the Motivation Assessment Scale (MAS), Questions About Behavioral Function (QABF), and Analog Assessment Outcomes
An analysis of interrater agreement across multiple respondents on anecdotal assessments was compared with experimental functional analysis outcomes for correspondence. Experiment 1 evaluated the agreement of multiple respondents on the function of problem behavior for 22 individuals across 42 target behaviors using the Motivation Assessment Scale (MAS) and the Questions About Behavioral Function (QABF). Results showed agreement on the primary maintaining consequence for 4 or 5 of the 5 respondents in 52% (22/42) of the individual's target behaviors with the MAS and 57% (24/42) with the QABF. Experiment 2 examined whether correspondence occurred between the anecdotal assessment results and experimental functional analysis (EFA) results for 7 individuals selected from Experiment 1. Correspondence between the QABF assessment and the EFA was found for 6 of 7 participants, and 4 of the 7 showed correspondence between the EFA and the MAS. This study showed that the QABF had higher correspondence with analog assessments than the MAS thus, supporting the previous findings of Paclawskyj et al. (2001). digital.library.unt.edu/ark:/67531/metadc28477/
Rail Transit and Its Influence on Land Use: A Dallas Case Study
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Mass transit investments continue to be utilized in many cities as means of dealing with various transportation issues. In Dallas Texas, light rail transit was developed with the hopes of encouraging compact and orderly growth. This research uses the DART system as a case study in examining transportation/land use relationships in Dallas. As such, this thesis reviews past research that examined transit systems impacts on urban areas, analyzes historical changes in land use pattern development around the existing twenty stations of the DART light rail starter system, and summarizes the progression of land use trends in the transit corridor as they relate to DART impacts. Results of this study suggest that DART's light rail system has been an effective tool used in achieving the transportation and land use goals for the region. Finally, recommendations are presented with respect to what can be expected for future light rail development in Dallas. digital.library.unt.edu/ark:/67531/metadc2847/
Daughters of the King and Founders of a Nation: Les Filles du Roi in New France
The late seventeenth century was a crucial era in establishing territorial claims on the North American continent. In order to strengthen France's hold on the Quebec colony, Louis XIV sent 770 women across the Atlantic at royal expense in order to populate New France. Since that time, these women known as the filles du roi, have often been reduced to a footnote in history books, or else mistakenly slandered as women of questionable morals. This work seeks to clearly identify the filles du roi through a study of their socioeconomic status, educational background, and various demographic factors, and compare the living conditions they had in France with those that awaited them in Canada. The aim of this undertaking is to better understand these pioneer women and their reasons for leaving France, as well as to identify the lasting contributions they made to French-Canadian culture and society. digital.library.unt.edu/ark:/67531/metadc28470/
Examining the Origins of Sociology: Continuities and Divergences Between Ibn Khaldun, Giambattista Vico, August Comte, Ludwig Gumplowicz, and Emile Durkheim
This thesis examines the extent to which Ibn Khaldun can legitimately be considered a founding father of sociology. To pursue this research, Khaldun's theoretical framework will be compared with four Western scholars: Auguste Comte, Emile Durkheim, Giambattista Vico, and Ludwig Gumplowicz. This paper begins with an Introduction (Chapter I), followed by a general overview of Khaldun's work (Chapter II). Next, Khaldun's work is compared to that of Auguste Comte (Chapter III), Emile Durkheim (Chapter IV), Ludwig Gumplowicz (Chapter V) and Giambattista Vico (Chapter VI). In each of these chapters, Khaldun is compared and contrasted to the other social theorist, illustrating their similarities and considering their differences. Finally, in Chapter VII, I put forth conclusions that consider the extent to which Khaldun can validly be considered a founding father of sociology. digital.library.unt.edu/ark:/67531/metadc28478/
The Legacy of Theodore Leschetizky as Seen through His Pedagogical Repertoire and Teaching Style
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Theodore Leschetizky's singular pianistic legacy survives to this day because of his revolutionary pedagogical methods and his compositions for the piano repertory. The amalgamation of these two aspects formed his distinctive contributions to the fields of piano and piano pedagogy and left an indelible mark on the history of the instrument. His students lead an impressive list of the greatest artists of the previous century, each influencing the evolution of pianism with their own remarkable style and personality. While Leschetizky was arguably without peer as a pedagogue, many pianists today are unaware of the vast number of compositions that he wrote. These pieces were intended not only for the concert stage, but also as a very specific pedagogical repertoire that he used within his own teaching studio. This repertoire comprises a vital component of the Leschetizky legacy, albeit one which is often slighted in comparison. It is imperative that the pianists of our current generation understand the dual aspects of his contribution to our art form, in order to fully grasp the way in which he has changed the face of pianism. The purpose of this dissertation and lecture recital is to enumerate the various aspects that constitute the dual components of Leschetizky's pianistic legacy. For pedagogues of the current generation, it is of vital importance that we understand not only our own personal pedagogical lineage, but the various other individuals that, through their contributions, have led us to where we are in our understanding of the instrument. What is needed in the current research on this subject is one individual source that not only documents the characteristics of a pedagogical genius, but explores the legacy he left for future generations through documented accounts of his students and the examination of his own unfamiliar, pedagogical repertoire for the piano. digital.library.unt.edu/ark:/67531/metadc28474/
A Study of Student's Perceptions of Blended Learning Environments at a State-Supported Postsecondary Institution
The purpose of this study was to conduct exploratory research regarding students' perceptions of blended learning environments at a state supported postsecondary institution. Specifically investigated were students' overall perceptions of blended learning environments, the reasons they chose to take a blended course, and whether generational differences existed in students' affected perceptions. An electronic survey was distributed to students enrolled in blended learning courses at the end of the spring 2009 term. digital.library.unt.edu/ark:/67531/metadc28475/
161 Glass: Site Specific Music in an Artistic Context
The composition 161 Glass is a 17-minute musical work with percussion, wind and brass instruments in which the intersection of mid-century architecture, and the art and culture of a dynamic city are inextricably linked. Through this paper, I explore the process of composing a musical work in relationship to the significance of site specific context. The paper begins by defining the concept of site specific art works; then reviews the discourse of the intersection of art, music and architecture. I then delve into the cultural and geographic context surrounding this project from the modern era through the present, and how those perspectives apply to the building and my piece. I reveal how the composition relates the musical ideas to the site. Finally, I describe the collaborative process between myself, the musicians and the Dallas Contemporary staff. digital.library.unt.edu/ark:/67531/metadc28472/
Retirees' Attitudes Toward Mental Illness Treatment: A Life-Course Perspective
This purpose of this dissertation was to examine the attitudes of retirees toward mental illness treatment. Secondary data from the Survey Research Center at the University of North Texas was utilized for this study. The focus was on the influence that gender, income, education, race/ethnicity, personal experience, fear, goodwill, and social control might have had on retirees' attitudes toward mental illness treatment. An n = 225 was selected out of the existing data to serve as the sample population. Binary logistic regression was utilized to analyze the data. Results indicated that the obtained significant findings were consistent with existing literature. digital.library.unt.edu/ark:/67531/metadc28479/
Determining Factors that Influence High School Principal Turnover Over a Five Year Period
The purpose of this study was to determine the effects of salary, compensation and benefits, accountability, job stress, increased instructional responsibilities, changes in student demographics, lack of support, politics, advancement opportunities and promotion on tenure and turnover among high school principals in the state of Texas. The participants in the study included 60 Texas high school principals who left a high school principalship for a different high school principalship within the past 5 years. The participants completed the Texas Principal Survey and data were analyzed using binary logistic regression. The data indicated that salary, compensation and benefits was a significant factor in predicting an increase in the odds of principal turnover for principals who had been in their prior principalship 5 or more years over principals who had been in their prior principalship less than 5 years. Additionally, advancement opportunities was a significant factor in predicting a decrease in the odds of principal turnover for principals who had been in their prior principalship 5 or more years over principals who had been in their prior principalship less than 5 years. Responses from an open ended question asking principals why they left their prior principalship suggested that principals left for reasons including new challenges, lack of support and family. The results of this study support the need for continued research in the area of principal turnover and provide insight to district superintendents, school boards and principals. digital.library.unt.edu/ark:/67531/metadc28476/
Microwave-Assisted Synthesis, Characterization, and Photophysical Properties of New Rhenium(I) Pyrazolyl-Triazine Complexes
The reaction of the chelating ligand 4-[4,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)-1,3,5-triazin-2-yl]-N,N-diethyl-benzenamine, L, with pentacarbonylchlororhenium by conventional heating method produces the complexes fac-[ReL(CO)3Cl2] and fac-[Re2L(CO)6Cl2] in a period of 48 hours. The use of microwaves as the source of heat and the increase in the equivalents of one of the reactants leads to a more selective reaction and also decreases the reaction time to 1 hour. After proper purification, the photophysical properties of fac-[ReL(CO)3Cl] were analyzed. The solid-state photoluminescence analysis showed an emission band at 628 nm independent of temperature. However, in the solution studies, the emission band shifted from 550 nm in frozen media to 610 nm when the matrix became fluid. These results confirm that this complex possess a phenomenon known as rigidochromism. digital.library.unt.edu/ark:/67531/metadc28473/
X, An Analytical Approach to John Chowning's Phoné
The analysis of computer music presents new challenges to the field of music theory. This study examines the fixed media composition Phoné by John Chowning from its aesthetic perspective, compositional theory and computer sound synthesis techniques. Fast Fourier Transform analyses are used to create spectrograms. The findings from the spectrograms are juxtaposed with compositional philosophies of John Chowning, Jean-Claude Risset, Pierre Schaeffer and Arnold Schoenberg and the techniques are represented via PureData patches. digital.library.unt.edu/ark:/67531/metadc28445/
Use of GIS to Identify and Delineate Areas of Fluoride, Sulfate, Chloride, and Nitrate Levels in the Woodbine Aquifer, North Central Texas, in the 1950s, 1960s, 1970s, 1980s, and 1990s
ArcView and ArcInfo were used to identify and delineate areas contaminated by fluoride, sulfate, chloride, and nitrate in the Woodbine Aquifer. Water analysis data were obtained from the TWDB from the 1950s to 1990s covering 9 counties. 1990s land use data were obtained to determine the relationship with each contaminant. Spearman's rank correlation coefficients and Kruskal-Wallis tests were used to calculate relationships between variables. Land uses had little effect on distributions of contaminants. Sulfate and fluoride levels were most problematic in the aquifer. Depth and lithology controlled the distributions of each contaminant. Nitrate patterns were controlled mainly by land use rather than geology, but were below the maximum contaminant level. In general, contaminant concentrations have decreased since the 1950s. digital.library.unt.edu/ark:/67531/metadc2869/
Three Topics in Descriptive Set Theory
This dissertation deals with three topics in descriptive set theory. First, the order topology is a natural topology on ordinals. In Chapter 2, a complete classification of order topologies on ordinals up to Borel isomorphism is given, answering a question of Benedikt Löwe. Second, a map between separable metrizable spaces X and Y preserves complete metrizability if Y is completely metrizable whenever X is; the map is resolvable if the image of every open (closed) set in X is resolvable in Y. In Chapter 3, it is proven that resolvable maps preserve complete metrizability, generalizing results of Sierpi&#324;ski, Vainštein, and Ostrovsky. Third, an equivalence relation on a Polish space has the Laczkovich-Komjáth property if the following holds: for every sequence of analytic sets such that the limit superior along any infinite set of indices meets uncountably many equivalence classes, there is an infinite subsequence such that the intersection of these sets contains a perfect set of pairwise inequivalent elements. In Chapter 4, it is shown that every coanalytic equivalence relation has the Laczkovich-Komjáth property, extending a theorem of Balcerzak and G&#322;&#261;b. digital.library.unt.edu/ark:/67531/metadc28441/
Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity
Alpine zooplankton are exposed to a variety of stressors in their natural environment including ultraviolet radiation. Physiological coping mechanisms such as the accumulation of photoprotective compounds provide these zooplankton protection from many of these stressors. Elevated levels of carotenoid compounds such as astaxanthin have been shown to help zooplankton survive longer when exposed to ultraviolet radiation presumably due to the strong antioxidant properties of carotenoid compounds. This antioxidant capacity is important because it may ameliorate natural and anthropogenic stressor-induced oxidative stress. While previous researchers have shown carotenoid compounds impart increased resistance to ultraviolet radiation in populations of zooplankton, little work has focused on the toxicological implications of PAH induced phototoxicity on zooplankton containing high levels of carotenoid compounds. This thesis discusses research studying the role that carotenoid compounds play in reducing PAH induced phototoxicity. By sampling different lakes at elevations ranging from 9,500' to 12,700' in the front range of the Colorado Rocky Mountains, copepod populations containing different levels of carotenoid compounds were obtained. These populations were then challenged with fluoranthene and ultraviolet radiation. Results discussed include differences in survival and levels of lipid peroxidation among populations exhibiting different levels of carotenoid compounds, and the toxicological and ecological implications of these results. digital.library.unt.edu/ark:/67531/metadc28444/
A Possible Role of Ascorbate in Boron Deficient Radish (Raphanus sativa L. cv. Cherry Belle)
The most apparent symptom of boron deficiency in higher plants is a cessation of growth. Deficiency causes a reduction in ascorbate concentration and the absorption of nutrient ions. Addition of ascorbate temporarily relieves deficiency symptoms. In boron sufficient plants the addition of ascorbate to media causes an increased uptake of nutrients. In an attempt to discover if ascorbate addition to deficient plants causes increased ion uptake, radish plants were grown hydroponically in four different strengths of boron solution. A colorimetric assay for phosphorus was performed both before and after supplementation. Results, however, were inconclusive. digital.library.unt.edu/ark:/67531/metadc2867/
Similarities in the Use of Dramatic Recitative Style in the Music of Claudio Monteverdi and Giuseppe Verdi, with Some Performance-Practice Issues
The objective of this dissertation, inspired by performance experience, was to establish the similarities in the use of recitative style in the music of Claudio Monteverdi and Giuseppe Verdi. To achieve this objective, their use of recitative style was examined through comparative analysis of four scenes from their operas: “Arianna's Lament” from L'Arianna and “Disprezzata regina” from L'incoronazione di Poppea by Monteverdi, and “Condotta ell'era in ceppi” from Il trovatore and “Judgment Scene” from Aida by Verdi. The examination of the similarities included a discussion of the following: (a) the historical influences and cultural backgrounds of the composers; (b) general similarities in their compositional approaches to recitative style; (c) comparable characteristics of the dramatic recitative style in the early Baroque monody and in Verdi's operas; (d) similarities in musical characterization and expression of affective and emotional content through stylistic musical devices; (e) similarities in the composers' approaches to vocal and acting issues with special emphasis on the problems of diction; and (f) some related performance-practice issues. A discussion of the poetic lament and the influence of its form and content on musical setting was also a part of this research. The comparative research revealed numerous similarities in the historical circumstances influencing Monteverdi's and Verdi's choice of musical styles; their motivation; formal and stylistic characteristics of their dramatic recitative scenes; their choice of libretto; their use of the elements of lament; their musical treatment of emotional content of the text; and their prerogatives in vocal and acting issues. Numerous similar characteristics were also established regarding vibrato, tempo, rhythm, and ornamentation in the performance practice of the early Baroque recitative soliloquy and Verdi's dramatic recitative scenes. The similarities of the four scenes' functions, topics, form, and characterization through devices of musical style indicated a fundamental continuity in the development of Italian opera from its inception to the end of the nineteenth century. digital.library.unt.edu/ark:/67531/metadc2880/
The regulatory roles of PyrR and Crc in pyrimidine metabolism in Pseudomonas aeruginosa
The regulatory gene for pyrimidine biosynthesis has been identified and designated pyrR. The pyrR gene product was purified to homogeneity and found to have a monomeric molecular mass of 19 kDa. The pyrR gene is located directly upstream of the pyrBC' genes in the pyrRBC' operon. Insertional mutagenesis of pyrR led to a 50- 70% decrease in the expression of pyrBC', pyrD, pyrE and pyrF while pyrC was unchanged. This suggests that PyrR is a positive activator. The upstream regions of the pyrD, pyrE and pyrF genes contain a common conserved 9 bp sequence to which the purified PyrR protein is proposed to bind. This consensus sequence is absent in pyrC but is present, as an imperfect inverted repeat separated by 11 bp, within the promoter region of pyrR. Gel retardation assays using upstream DNA fragments proved PyrR binds to the DNA of pyrD, pyrE, pyrF as well as pyrR. This suggests that expression of pyrR is autoregulated; moreover, a stable stem-loop structure was determined in the pyrR promoter region such that the SD sequence and the translation start codon for pyrR is sequestered. β-galactosidase activity from transcriptional pyrR::lacZ fusion assays, showed a two-fold in increase when expressed in a pyrR- strain compared to the isogenic pyrR+ strain. Thus, pyrR is negatively regulated while the other pyr genes (except pyrC) are positively activated by PyrR. That no regulation was seen for pyrC is in keeping with the recent discovery of a second functional pyrC that is not regulated in P. aeruginosa. Gel filtration chromatography shows the PyrR protein exists in a dynamic equilibrium, and it is proposed that PyrR functions as a monomer in activating pyrD, pyrE and pyrF and as a dimeric repressor for pyrR by binding to the inverted repeat. A related study discovered that the catabolite repression control (Crc) protein was indirectly involved in pyr gene regulation, and shown to negatively regulate expression of PyrR at the posttranscriptional level. digital.library.unt.edu/ark:/67531/metadc2875/