UNT Theses and Dissertations - 336 Matching Results

Search Results

The Effects of Interactive Reviews and Learning Style on Student Learning Outcomes at a Texas State University

Description: This study investigated the effects of interactive lessons and learning style on student learning outcomes in self-defense education classes. The study utilized an experimental design that incorporated four self-defense education classes at the University of North Texas (UNT) during the fall semester 2007 (N = 87). A pre-test was administered during the first week of class to determine prior knowledge of the participants. The Visual Auditory Reading/Kinesthetic Inventory (VARK) was used to assess the learning styles of the students and was completed after the pre-test of knowledge was administered. The treatment group received the interactive lesson and the control received a paper review. The difference between the pre and posttest was used as a measure of improvement of the student's learning outcomes. A 2 (treatment/control) by 2 (pretest/posttest) ANOVA with repeated measures was conducted to examine the differential improvement in knowledge across the intervention. Based on the 2-way ANOVA there was a significant difference between the treatment group and the control group based on their learning outcomes. A repeated measures ANOVA was conducted to determine if there was a significant difference between the groups based on the pre and post test scores. Based on the results of a one week study it was determined that interactive lessons do make a significant impact on learning outcomes compared to traditional reviews.
Date: May 2008
Creator: Adams, Wesley
Partner: UNT Libraries

Critical Theory and Preservice Art Education: One Art Teacher Educator's Journey of Equipping Art Teachers for Inclusion.

Description: This qualitative action research study examines how critical theory defined and guided my practice as an art teacher educator while I provided inclusion training for seven preservice art teachers during their student teaching. Sources of data included a personal journal, the inclusion curriculum I created for the preservice teachers and questionnaires and interviews. Primary findings indicated that critical theory had a substantive impact on the evolving development of my teaching philosophy, in particular my attention to issues of power redistribution in the classroom and my developing notion of teaching as form of artistry. The findings of this study also indicate that the primary impact of critical theory upon the preservice teachers was the articulation of their personal narratives and its relation to the development of their teaching identities. Further, mentoring these preservice art teachers in critical theory increased their competence in solving educational dilemmas. A primary finding of this study was how significant of a role the supervising or mentor teacher plays in developing preservice teachers' identity. As this is acknowledged, valued and utilized, more collaborative relationships among these stakeholders in the education of the preservice art teacher can be forged. The study provides implications for art teacher educators as they provide inclusion training to preservice teachers. These include honoring narratives, articulating a broader notion of inclusion, and using context-specific instructional tools while preservice teachers are completing fieldwork with students with disabilities. One suggestion for future research is to conduct longitudinal studies which explore and validate the impact of critical theory upon art teacher educators and preservice art teachers during the student teaching semester and several years beyond.
Date: May 2008
Creator: Allison, Amanda
Partner: UNT Libraries

Perturbation of renewal processes

Description: Renewal theory began development in the early 1940s, as the need for it in the industrial engineering sub-discipline operations research had risen. In time, the theory found applications in many stochastic processes. In this thesis I investigated the effect of seasonal effects on Poisson and non-Poisson renewal processes in the form of perturbations. It was determined that the statistical analysis methods developed at UNT Center for Nonlinear Science can be used to detect the effects of seasonality on the data obtained from Poisson/non-Poisson renewal systems. It is proved that a perturbed Poisson process can serve as a paradigmatic model for a case where seasonality is correlated to the noise and that diffusion entropy method can be utilized in revealing this relation. A renewal model making a connection with the stochastic resonance phenomena is used to analyze a previous neurological experiment, and it was shown that under the effect of a nonlinear perturbation, a non-Poisson system statistics may make a transition and end up in the of Poisson basin of statistics. I determine that nonlinear perturbation of the power index for a complex system will lead to a change in the complexity characteristics of the system, i.e., the system will reach a new form of complexity.
Date: May 2008
Creator: Akin, Osman Caglar
Partner: UNT Libraries

24, Lost, and Six Feet Under: Post-traumatic television in the post-9/11 era.

Description: This study sought to determine if and how television texts produced since September 11, 2001, reflect and address cultural concerns by analyzing patterns in their theme and narrative style. Three American television serials were examined as case studies. Each text addressed a common cluster of contemporary issues such as trauma, death, and loss.
Date: May 2008
Creator: Anderson, Tonya
Partner: UNT Libraries

The Impact of Visceral Influences on Consumers' Evaluation of Weight Loss Advertising

Description: The weight loss industry has come under fire from the Federal Trade Commission (FTC) in recent years due to consumer claims that many firms, marketing weight loss products, are using advertisements in an attempt to deceive consumers. Illegitimate weight loss claims have created so much concern that a White Paper call-to-action to investigate misleading weight loss advertisements has been filed. Despite recent interest, little attention has been garnered concerning the understanding of why consumers respond to potentially misleading weight loss claims. Intuitively, an understanding of why consumers fall prey to weight loss claims may aid academics, practitioners, and policy makers as they make important decisions relative to the weight loss industry and its practices. This study fills that void by applying a theory of visceral influences (TVI) to the context of weight loss advertising. Loewenstein's TVI was developed to aid in explaining why consumers make decisions contrary to their long-term self-interest. Visceral influences are drive states that have a direct hedonic impact, have an effect on the relative desirability of various goods and activities, and consequently, have a strong influence over the decisions consumers make. Common visceral cues (cues associated with any reward linked to a visceral factor) include proximity of reward, vividness of reward, and visual priming. To adequately test TVI in the context of weight loss advertising, a two step approach was used. First, advertiser intent was assessed through content analysis of weight loss advertisements. Second, composite advertisements were created from the content analysis to assess subject response to visceral cues common in weight loss advertising. MANOVA results show that the presence of visceral cues affected subjects' thoughts, buying impulse, affective reaction, intentions, and product evaluation. This research makes the following contributions. First, it addresses an area of public policy where there is a need for research to ...
Date: May 2008
Creator: Amos, Clinton L.
Partner: UNT Libraries

Uniqueness Results for the Infinite Unitary, Orthogonal and Associated Groups

Description: Let H be a separable infinite dimensional complex Hilbert space, let U(H) be the Polish topological group of unitary operators on H, let G be a Polish topological group and φ:G→U(H) an algebraic isomorphism. Then φ is a topological isomorphism. The same theorem holds for the projective unitary group, for the group of *-automorphisms of L(H) and for the complex isometry group. If H is a separable real Hilbert space with dim(H)≥3, the theorem is also true for the orthogonal group O(H), for the projective orthogonal group and for the real isometry group. The theorem fails for U(H) if H is finite dimensional complex Hilbert space.
Date: May 2008
Creator: Atim, Alexandru Gabriel
Partner: UNT Libraries

Michael Nyman: The Man Who Mistook His Wife for a Hat

Description: Composer Michael Nyman wrote the one-act, minimalist opera The Man Who Mistook His Wife for a Hat, based off the neurological case study written by Oliver Sacks under the same title. The opera is about a professional singer and professor whom suffers from visual agnosia. In chapter 1, the plot and history of the opera are discussed. Chapter 2 places The Man Who Mistook His Wife for a Hat alongside a selection of minimalist operas from Philip Glass and John Adams. Chapter 3 contains a history of the Fluxus art movement and shows where Fluxus-like examples appear in the opera. Chapter 4 includes Nyman's usage of minimalism, vocal congruencies, and Robert Schumann as musical elements that convey the drama.
Date: May 2008
Creator: Avant-Rossi, Joan
Partner: UNT Libraries

Street Chords and the Truth: A Street Level View of Country Music

Description: Singers and songwriters come to Nashville, Tennessee because they consider it the center of the country music universe and the best place to perform their songs as they try and break into the music business. Though few ever experience success in this competitive field, artists continue to arrive in Nashville and many don't have the commercial potential that would allow them the opportunity to perform anywhere but on the city's streets. The film, Street Chords and the Truth: A Street Level View of Country Music, focuses on these interesting performers and their music. Country music has been examined by a handful of ethnomusicologists and is often called the music of everyday life. Many recognize its dependence on ordinary singing styles, common phrasings, southern accents and traditional costuming as central to its identity and critical source of its value as a commodity. While many studies have been conducted focusing commercially popular country music singers and the music industry, few studies been conducted on singers who meet all the critical criteria for country music except commercial viability. This documentary examines country music more as a critical element of cultural identity and less as a commodity.
Date: May 2008
Creator: Bevins, Thomas
Partner: UNT Libraries

Women's career success: The contributions of human capital, individual, organizational, and power variables.

Description: Women are a significant presence in today's workforce; however, few rise to the top management ranks. Therefore, there is a critical need to better understand the factors that facilitate their success. This study examined several variables that may contribute to women's objective (income, span of control, promotions) and subjective (self-reported satisfaction) success. Predictive variables include human capital (training, experience), individual (perception of promotability, motivation for training), organizational (supervisor gender, percentage of male subordinates) and power (extent of supervisory authority) factors. Participants were members of the National Longitudinal Surveys Young Women cohort, conducted by the Bureau of Labor Statistics. Data were analyzed through simultaneous multiple regression analysis, and the results indicated that education was significantly related to income for all women. For women in management positions, their degree of supervisory power was also predictive of higher income, yet negatively associated with job satisfaction. Further, their span of control was positively influenced by the amount of time they spent in on-the-job training. The implications for women's career advancement, study limitations, and future research possibilities are also discussed.
Date: May 2008
Creator: Blansett, Karen D.
Partner: UNT Libraries

The Road to Development is Paved With Good Institutions: The Political and Economic Implications of Financial Markets

Description: This research seeks to identify the factors that account for the variation in development levels across nations by focusing on the institutional components of development, especially the effects of financial market development on economic and political development. I argue that financial market institutions are critical to economic and political development, and provide a partial explanation for the variation in development observed across nations. Financial market development affects political development indirectly through greater economic efficiency and growth and directly by reducing poverty, increasing economic equality, strengthening the middle class and increasing political participation. Increased financial market development also produces more efficient institutions and eliminates certain perverse incentives in government that result in corruption. The action mechanisms rest largely on the idea that increasing access to financial services allows the lower and middle- income segments of society to smooth their income and invest in high return activities that can lift people out of poverty. These improvements distribute both economic and intellectual resources throughout society and provide greater opportunities for political entrepreneurship from all societal groups. This, along with greater ability to participate either through monetary means or greater time, increases political participation and democratic development. Using a variety of econometric techniques to analyze data on 190 countries over 28 years (1975-2003), I show that financial market development has a significant effect in several areas of development. Specifically, I find that financial market development reduces poverty and income inequality and reduces the level of corruption. Increasing financial market development also increases political competition and civil rights protection in addition to increasing the effectiveness of government and regulatory levels. Ultimately, I assert that while financial market factors have not been previously targeted as sources for development, they may provide an effective policy tool for fostering equitable development in a variety of economic and political ...
Date: May 2008
Creator: Brown, Chelsea Denise
Partner: UNT Libraries

Imagined Sounds: Their Role in the Strict and Free Compositional Practice of Anton Bruckner

Description: The present study develops a dynamic model of strict and free composition that views them as relative to a specific historical context. The dynamic view espoused here regards free embellishments of an earlier compositional generation as becoming the models for a strict compositional theory in a later one. From the newly established strict compositional models, succeeding generations of composers produce new free embellishments. The first part of the study develops the dynamic conception of a continuously emerging strict composition as the context necessary for understanding Anton Bruckner's compositional methodology with respect to the harmonic instruction of his teacher, Simon Sechter. In other words, I view Sechter's harmonic theories as a strict compositional platform for Bruckner's free compositional applications. Many theoretical treatises of the seventeenth, eighteenth and nineteenth centuries such as those by Christoph Bernhard, Johann Philipp Kirnberger and Sechter acknowledged that strict composition must provide the structural framework for free composition. The above procedure becomes a manner of justifying a free embellishment since a "theorist" can demonstrate or assert the steps necessary to connect it with an accepted model from a contrapuntal or harmonic theory. The present study demonstrates that the justification relationship is a necessary component for understanding any theory as a strict/free one. By examining Sechter as a strict methodology for Bruckner, we can view the free applications that the latter develops. Bruckner's own theoretical documents-the marginalia in his personal copy of Sechter's Die Grundsätze der musikalischen Komposition and his lecture notes, Vorlesungen über Harmonie und Kontrapunkt an der Universität Wien, taken by Ernst Schwanzara-provide extensions and elaborations to Sechter's theories. In addition, theorists sympathetic to Sechter's approach and Bruckner's personal students provide further material for understanding Bruckner's free application of Sechter's strict harmonic perspective. The study uses my own observations, as well as the extensions indicated above, ...
Date: May 2008
Creator: Brooks, Jonathan
Partner: UNT Libraries

Interpersonal Decentering and Psychopathology in a University Clinic Sample

Description: This study examined the relationship between interpersonal decentering and symptoms of psychopathology among 48 clients from the Psychology Clinic at the University of North Texas. The Thematic Apperception Test (TAT) and the Symptom Checklist 90-Revised (SCL-90-R®) instrument were administered to clients along with demographic packets. Interpersonal decentering was assessed using Melvin Feffer's Interpersonal Decentering Scoring System for the TAT. It was hypothesized that higher scores of global symptom severity would be associated with lower scores of interpersonal decentering. Higher scores of paranoid ideation, psychoticism, and hostility were also hypothesized to be associated with lower scores of interpersonal decentering. Results did not support these hypotheses. However, exploratory analyses revealed a significant correlation between higher scores of phobic anxiety and lower scores of interpersonal decentering. Results also provided information regarding the three methods for calculating interpersonal decentering summary scores.
Date: May 2008
Creator: Burkman, Summer D.
Partner: UNT Libraries

Taking Steps toward Recidivism Prevention: Examining the Impact of Cognitive Behavioral Therapy on Juvenile Delinquency

Description: Researchers within the criminal justice field have examined recidivism to discover effective methods to deter criminals from re-offending. Typically, incarceration provided specific deterrence for offenders but recidivism after release proved problematic. Using secondary data analysis, the present study evaluates a cognitive behavioral therapy [CBT] program, Reasoning and Rehabilitation, which the state of Colorado implemented in 1995 among juveniles on intensive probation. The original research team collected the data through pre- and post-questionnaires and interviews with probation officers. The pre- and post-test data are utilized to specifically analyze certain variables including self-control, empathy and problemsolving abilities. The focus of the present study is to determine the level of change in these particular variables as an outcome of completing the CBT program. This analysis also explores the value of CBT programs and examines how the programs alter an offender's level of selfcontrol, empathy and problem-solving abilities thus reducing recidivism after completion.
Date: May 2008
Creator: Cain, Stefanie A.
Partner: UNT Libraries

Microscopic Foundations of Thermodynamics and Generalized Statistical Ensembles

Description: This dissertation aims at addressing two important theoretical questions which are still debated in the statistical mechanical community. The first question has to do with the outstanding problem of how to reconcile time-reversal asymmetric macroscopic laws with the time-reversal symmetric laws of microscopic dynamics. This problem is addressed by developing a novel mechanical approach inspired by the work of Helmholtz on monocyclic systems and the Heat Theorem, i.e., the Helmholtz Theorem. By following a line of investigation initiated by Boltzmann, a Generalized Helmholtz Theorem is stated and proved. This theorem provides us with a good microscopic analogue of thermodynamic entropy. This is the volume entropy, namely the logarithm of the volume of phase space enclosed by the constant energy hyper-surface. By using quantum mechanics only, it is shown that such entropy can only increase. This can be seen as a novel rigorous proof of the Second Law of Thermodynamics that sheds new light onto the arrow of time problem. The volume entropy behaves in a thermodynamic-like way independent of the number of degrees of freedom of the system, indicating that a whole thermodynamic-like world exists at the microscopic level. It is also shown that breaking of ergodicity leads to microcanonical phase transitions associated with nonanalyticities of volume entropy. The second part of the dissertation deals with the problem of the foundations of generalized ensembles in statistical mechanics. The starting point is Boltzmann's work on statistical ensembles and its relation with the Heat Theorem. We first focus on the nonextensive thermostatistics of Tsallis and the associated deformed exponential ensembles. These ensembles are analyzed in detail and proved (a) to comply with the requirements posed by the Heat Theorem, and (b) to interpolate between canonical and microcanonical ensembles. Further they are showed to describe finite systems in contact with finite heat baths. ...
Date: May 2008
Creator: Campisi, Michele
Partner: UNT Libraries

Minimum levels of physical activity and perceived quality of life.

Description: The purpose of this study was to examine the association between engaging in minimum levels of physical activity as defined by ACSM and perceived quality of life. A total of 43 college students were included in a repeated measures, quasi-experimental design research study that produced an overall retention rate of 65%, which resulted in 15 students being placed in the treatment group, and 28 students being placed in the control group. Analysis of variance with repeated measures was used to compare the quality of life mean scores over three administrations of the Quality of Life Inventory (QOLI), which resulted in no significant main effects for either the time measure or the group measure, but did produce a significant interaction effect. Post hoc analyses showed there was a significant difference between the treatment and control groups' quality of life mean scores only during the second administration of the instrument. Further analysis showed that the control group had significantly higher quality of life domain scores for six of the 16 quality of life domains. There were no significant differences between groups across any of the physiological measures. These findings did not support previous research that increasing individuals' level of physical activity will enhance their perceived quality of life. Instead, this study only provokes more questions about the connection between physical activity and perceived quality of life.
Date: May 2008
Creator: Carothers, Cathleen de Souza Lourenco
Partner: UNT Libraries

School-based child parent relationship therapy (CPRT) with low income first generation immigrant Hispanic parents: Effects on child behavior and parent-child relationship stress.

Description: This quasi-experimental study examined the effects of child-parent relationship therapy (CPRT) with low income first generation immigrant Hispanic parents. Forty-eight parents were randomly assigned by school site to the experimental group (n=24) and to the no treatment control group (n=24). A two factor (Time x Group) repeated measures analysis of variance was performed to examine the effects of group membership (experimental, control) and time (pretest, posttest) on each of the six hypotheses. Dependent variables for the Spanish version of the Child Behavior Checklist (CBCL) included Externalizing Problems, Internalizing Problems, and Total Problems. Dependent variables for the Spanish version of the Parenting Stress Index (PSI) included Child Domain, Parent Domain, and Total Stress. Results indicated that from pre-test to post-test, parents who participated in the CPRT treatment group reported a statistically significant improvement on their children's behaviors at the alpha .025 level (Internalizing Problems p< .001; Externalizing Problems p< .001; Total Problems p<.001) when compared to children whose parents did not participate in CPRT. Partial eta squared (ηp2) further indicated that the effects of CPRT treatment on the experimental group compared to the control group from pre-test to post-test was large (ηp2 = .56; ηp2 = .59; and ηp2 = .68, respectively). Similarly, results indicated that from pre-test to post-test, parents who participated in the CPRT treatment group reported a statistically significant improvement on parent-child relationship stress at the alpha .025 level (Child Domain p< .001; Parent Domain p< .001; Total Stress p< .001) when compared to parents who did not participate in CPRT. Partial eta squared (ηp2) further indicated that the effects of CPRT treatment on the experimental group compared to the control group from pre-test to post-test was large (ηp2 = .39; ηp2 = .51; and ηp2 = .42, respectively).
Date: May 2008
Creator: Ceballos, Peggy
Partner: UNT Libraries

Immediate and subsequent effects of response-independent food delivery on problem behavior maintained by food.

Description: The immediate and subsequent effects of response-independent food delivery on problem behavior maintained by food were investigated. A functional analysis indicated that the participant's problem behavior was maintained by tangible (food) reinforcement. In a subsequent analysis, each occurrence of problem behavior produced a bite of wafer in the first and third components of mixed and multiple schedules, while either response-independent food or extinction was presented in the second component. Dense and lean schedules of food delivery were assessed. Results indicated that a very dense schedule of food nearly eliminated problem behavior, a very lean schedule of food and extinction produced substantial decreases in problem behavior, and intermediate schedules did not decrease problem behavior. Response patterns were differentiated across mixed and multiple schedule arrangements, with signaled changes in the schedules (multiple schedule) generally showing more immediate and sustained effects throughout the intervention component. Implications for interpretations of the effects of the intervention are discussed.
Date: May 2008
Creator: Cherryholmes, Lauren A.
Partner: UNT Libraries

Longitudinal Study of Loneliness and Depression as Predictors of Health in Mid- to Later Life

Description: The longitudinal relationship between loneliness and depression as predictors of chronic health conditions in middle-aged to older adults was investigated utilizing data collected by the Health and Retirement Study (HRS), a national representative longitudinal study of health, retirement, and aging, conducted by the Institute for Social Research (ISR) Survey Research Center (SRC) at the University of Michigan, funded by the National Institute on Aging and the Social Security Administration. The correlation between these loneliness and depression was moderate (r = .32 to r = 51). The single-item subjective self-report of loneliness was found to be an adequate measure of loneliness. A cross-lagged panel correlation and regression design was used to examine the longitudinal relationship between loneliness, depression, and chronic health conditions. A temporal precedence was indicated implying a causal relationship with depression leading to subsequent loneliness. The relationship between recurring loneliness and chronic health conditions was weak (r = .13).
Date: May 2008
Creator: Chlipala, M. Linda
Partner: UNT Libraries

The employment of historically-informed performance practices in present-day tuba performances of two Italian baroque violoncello transcriptions.

Description: As several Italian baroque violoncello transcriptions have entered the standard performance repertory for both high school and collegiate tubists, and as numerous texts, articles, and baroque performance instruction courses have illuminated a new realm of performance possibilities, no published document has provided specific, thorough, and sample approaches to performance on the tuba of a given piece (or pieces) through a detailed application of materials found in any singular source or combination of sources. Many of the existing articles and texts that approach the subject focus largely on ornamentation, while limiting the discussion and application of the following topics: tempo, spirit, affect, notation, rhythm, dynamics, and articulation. This document examines such topics and provides detailed explanations and suggestions of historically-informed characteristics applicable to two movements each from the R. Winston Morris transcription of Antonio Vivaldi's Sonata No. 3 in A Minor and the Donald C. Little/Richard B. Nelson transcription of Benedetto Marcello's Sonata No. V in C Major.
Date: May 2008
Creator: Coker, Bradley Gene
Partner: UNT Libraries

Modifications of epoxy resins for improved mechanical and tribological performances and their effects on curing kinetics.

Description: A commercial epoxy, diglycidyl ether of bisphenol-A, was modified by two different routes. One was the addition of silica to produce epoxy composites. Three different silane coupling agents, glycidyloxypropyl trimethoxy silane (GPS), -methacryloxypropyl trimethoxy silane (MAMS) and 3-mercaptopropyltriethoxy silane (MPS), were used as silica-surface modifiers. The effects of silica content, together with the effects of chemical surface treatment of silica, were studied. The results indicate that epoxy composites with silica exhibit mechanical and tribological properties as well as curing kinetics different than the pure epoxy. The optimum silica content for improved mechanical and tribological properties (low friction coefficient and wear rate) was different for each type of silane coupling agent. An unequivocal correlation between good mechanical and improved tribological properties was not found. Activation energy of overall reactions was affected by the addition of silica modified with MAMS and MPS, but not with GPS. The second route was modification by fluorination. A new fluoro-epoxy oligomer was synthesized and incorporated into a commercial epoxy by a conventional blending method. The oligomer functioned as a catalyst in the curing of epoxy and polyamine. Thermal stability of the blends decreased slightly at a high oligomer content. Higher wear resistance, lower friction coefficient and higher toughness were found with increasing oligomer content; thus in this case there was a correlation between good mechanical and improved tribological properties. The results indicated that increasing toughness and formation of a transfer film contribute to improved tribological performances.
Date: May 2008
Creator: Chonkaew, Wunpen
Partner: UNT Libraries

The Historical Development and Future of the Southern Bible Institute

Description: This study represents qualitative, historical research. The study documented the origins, milestones, and development of the Southern Bible Institute in Dallas, Texas. This study provided data leading to a better understanding of the impact of segregation on the African American religious community in Dallas, Texas. Data from this study also shows how African Americans responded to segregation in the area of theological higher education through the establishment of the Southern Bible Institute. The research methodology was heavily dependent on oral data from various sources and pertinent data were extrapolated from oral history interviews and historical, internal and external institutional documents. Analysis was based on accuracy, consistency and authenticity. Triangulation was the method used to determine the accuracy and authenticity of the oral interviews. The data were also analyzed for extrapolating factors that lend themselves to inclusion on an institutional assessment. Based on the factors extrapolated from the data and from a strengths, weaknesses, opportunities, and threats (SWOT) analysis, an internal institutional assessment checklist was created to assist the leadership in evaluating various aspects of the school. It was concluded that the future seems bright for the Southern Bible Institute, but it is recommended that the administration leverage off identified strengths and establish a plan for addressing the weaknesses noted as a result of this study. The Southern Bible Institute warrants further research that will use the factors identified in this study as the basis for quantitative studies that will clarify the impact of particular factors on institutional growth.
Date: May 2008
Creator: Cooks, Michael J.F.
Partner: UNT Libraries

What Went Wrong? How Arrogant Ignorance and Cultural Misconceptions Turned Deadly at the San Antonio Courthouse, March 19, 1840

Description: Although the Council House Fight is well written about in the annals of early Texas history, this all-encompassing study will reveal a whole new picture. Unlike previous works that maintained one point of view, multiple perspectives were analyzed and explored to allow a more comprehensive view of the Council House Fight to emerge. Primary focus on social and cultural misunderstandings, as well as the mounting hostility between the Penateka Comanche and Texians across the frontier, will demonstrate their general distrust and hatred of the other. Detailing their complicated relationship will prove that neither the Texians nor the Comanche were without blame, and both shared responsibility for the deterioration of events on and before March 19, 1840.
Date: May 2008
Creator: Copeland, Cristen Paige
Partner: UNT Libraries

An empirical investigation of the influence of age, gender, and occupational level on stress perceptions, job satisfaction, organizational commitment, and turnover.

Description: This study investigated relationships of age, gender, and supervisor level with job satisfaction, organizational commitment, stress perception, and turnover intention. The demographics were hypothesized to moderate the stress-satisfaction and commitment-turnover relationships. Hypotheses were tested using both parametric and non-parametric bootstrap methods. Subjects were taken from a national survey of 2,663 public sector IT workers. Missing data were imputed using NORM software. Ordinary least squares (OLS) regression indicated a significant direct effect from all main variables and covariates, except for age on turnover intent. No mediating effects were found. Age-Commitment was the only significant higher order modifier relationship, although Gender-Commitment explained substantial variance. LMG statistic results enabled the predictors to be rank ordered with confidence intervals. Best subset bootstrap regression explored all possible predictor orders to confirm which model explained the most variance. The original model and predictor sequence were confirmed. The bootstrap AIC statistic provided a model which maximized explained variance while optimizing parsimony. Since only age had a mediating effect, Hypotheses 1 and 2 were not supported. All other hypotheses were partially confirmed.
Date: May 2008
Creator: Cordas, Jon D.
Partner: UNT Libraries

Keywords in the mist: Automated keyword extraction for very large documents and back of the book indexing.

Description: This research addresses the problem of automatic keyphrase extraction from large documents and back of the book indexing. The potential benefits of automating this process are far reaching, from improving information retrieval in digital libraries, to saving countless man-hours by helping professional indexers creating back of the book indexes. The dissertation introduces a new methodology to evaluate automated systems, which allows for a detailed, comparative analysis of several techniques for keyphrase extraction. We introduce and evaluate both supervised and unsupervised techniques, designed to balance the resource requirements of an automated system and the best achievable performance. Additionally, a number of novel features are proposed, including a statistical informativeness measure based on chi statistics; an encyclopedic feature that taps into the vast knowledge base of Wikipedia to establish the likelihood of a phrase referring to an informative concept; and a linguistic feature based on sophisticated semantic analysis of the text using current theories of discourse comprehension. The resulting keyphrase extraction system is shown to outperform the current state of the art in supervised keyphrase extraction by a large margin. Moreover, a fully automated back of the book indexing system based on the keyphrase extraction system was shown to lead to back of the book indexes closely resembling those created by human experts.
Date: May 2008
Creator: Csomai, Andras
Partner: UNT Libraries