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An empirical investigation of the influence of age, gender, and occupational level on stress perceptions, job satisfaction, organizational commitment, and turnover.
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.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Keywords in the mist: Automated keyword extraction for very large documents and back of the book indexing.
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 …
Date:
May 2008
Creator:
Csomai, Andras
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Supplementing Annual School District Budgets: Partnerships, Fundraisers, Foundations, and Local Support Venues
School finance is the topic of numerous research studies; printed in newspapers and magazines, heard on the radio and television, and frequently spoken among educators throughout the nation. Anyone dealing with education is searching for methods of obtaining additional funds for projects and supplies; and even adding money directly to school districts' budgets. To better understand the importance of searching for additional funds to supplement the annual school districts' budgets, this study examines four sources for obtaining financial assistance: partnerships, fundraising, foundations, and local source venues. Participants include 10 school districts in the state of Texas having only a single high school campus; five Chapter 41 school districts and five Chapter 42 school districts. Two school districts are selected from each classification level: A, AA, AAA, AAAA, and AAAAA. One Chapter 41 (wealthy) district will be compared with one Chapter 42 (poor) school district within the same classification level. The five selected Chapter 41 school districts are above the equalized wealth limit of $305,000 per weighted average daily attendance. Data gathering procedures utilize a purposive case study by interviewing administrators in each of the school districts; studying Texas Education Agency's School Report Card, each school district's Actual Financial Data Report; …
Date:
May 2008
Creator:
Culbertson, Betty Kathryn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Birth of a Modern Concerto: An Explication of Musical Design and Intention in Journey: Concerto for Contrabass Tuba and Orchestra
John Stevens was commissioned by the Chicago Symphony Orchestra (CSO) and the Edward F. Schmidt Family Commissioning Fund to compose a concerto for its principal tubist, Gene Pokorny. The piece began with multiple conversations between composer and performer and from these meetings actualized the influences that shaped the work. The most important influences that the performer mentioned were his passions for American steam locomotives and the Three Stooges, both of which were used by Stevens in his rendering of the composition. This concerto was designed to be played on the famous CC York tuba that was played by the former principal tubist of the CSO, Arnold Jacobs, the same instrument used today. Insight into the history of the York tuba will be given as well as their influence on contemporary manufacturing and design. Focus is given to how Stevens writes the piece idiomatically to the CC tuba and potential performance problems when a performer uses tubas of a different key. Conversations with both gentlemen will display the non-musical influences on Journey and how this effects the composition. Stevens' compositional language is explored and discussed in respect to the challenges and idiosyncrasies within the work. Collegiate tuba professors provide explanation for …
Date:
May 2008
Creator:
Daussat, David M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Matter of Due Process: An Examination of How State Mandated Accreditation has Impacted Texas Crime Laboratories
Mandated accreditation of crime laboratories is a fairly new phenomenon. The state of Texas was the first to require that crime laboratories be accredited in order to be able to present evidence in a criminal proceeding. The laws that govern this are Texas House Bill 2703 and Texas House Bill 1068. The goal of this study is see how the enactment of these laws impacted crime laboratories. There are 42 crime laboratories that are accredited in the state of Texas. This study was conducted by the use of telephone survey interviews. Results indicated that mandated accreditation is a step in the right direction to ensure that objectivity is maintained during the processing and evaluation of physical evidence.
Date:
May 2008
Creator:
DeLillo, Sandy Dawn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Measuring indices of happiness in a parent-training program.
Behavior analysts have long recognized the need for direct and reliable measurement of complex behaviors that are important to society. Recently investigators have approached one of the singular most complex behaviors: happiness. Limited research, however, has explored happiness in parent-training programs with children with autism and their families. The current study applied the definitions and data systems used in Broome's 2007 study to obtain indices of happiness within a parent training program for parents of toddlers with autism. Direct measures of smiles and laughs were collected from videotaped assessments. Results suggest that the program increased behaviors associated with happiness. Results are discussed in terms of program development and future research.
Date:
May 2008
Creator:
Ewing, Sarah A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Just Intonation and the Revitalization of Neoclassicism: Three Works for Baroque Instruments
For a composer of today, the relationship between new music and music from many centuries past remains problematic. In order to create something new, it is necessary to go beyond previous techniques of composition in some way. At the same time, new music that has no connection with music of the past runs the risk of irrelevance. Just tuning offers one possibility for reconciling this problem. By effectively warping music of the past through the lens of altered tuning and contemporary composition techniques, music of the past may be understood in previously unknown ways. Part I, the critical essay, presents historical background and analysis of a cycle of three works in altered/just tuning. Part II presents scores of the works.
Date:
May 2008
Creator:
Figg, Graham Elliot
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
General Purpose Programming on Modern Graphics Hardware
I start with a brief introduction to the graphics processing unit (GPU) as well as general-purpose computation on modern graphics hardware (GPGPU). Next, I explore the motivations for GPGPU programming, and the capabilities of modern GPUs (including advantages and disadvantages). Also, I give the background required for further exploring GPU programming, including the terminology used and the resources available. Finally, I include a comprehensive survey of previous and current GPGPU work, and end with a look at the future of GPU programming.
Date:
May 2008
Creator:
Fleming, Robert
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Breast implants for graduation? Parent and adolescent narratives.
The purpose of this research is to examine through sociological and psychological theories how women make sense of the desire and attainment of breast implants for graduation. The study used a qualitative approach and focused on women ages 18-35 in the state of Texas who have received breast implants for graduation. The sample size in this study included 10 high-school graduates receiving implants as a gift and their 10 mothers. Seven theoretical paradigms provided a better understanding for why the daughters asked for breast implants and why the parent(s) paid for them. Symbolic interaction theory explained why the daughters wished to replace their "fake" cotton padded self with their augmented self, to become the most authentic woman possible. Social construction of reality theory explained why both mothers and daughters wanted to conform to the social construction of gender, and to accomplish their gender well. Conspicuous consumption theory demonstrated how cosmetic surgery practices allow women to appear wealthy, gain status, and "flash" their assets. Feminist theory explained why some women were motivated to capture the attention of men and others altered the body out of empowerment. Reference group and social comparison theories explained how the women in this study were influenced …
Date:
May 2008
Creator:
Fowler, Lori Ann
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Paradox and Balance in the Anglo-Saxon Mind of Beowulf
This essay argues that the Anglo-Saxon poet of Beowulf presents the reader with a series of paradoxes and attempts to find a balance within these paradoxes. At the forefront is the paradox of past and present, explored through the influence of the past on the characters in the poem as well as the poet. Additionally, the poem offers the paradox of light and dark, which ultimately suggests light and dark as symbols of Christianity and paganism. Finally, the land and the sea offer the third primary paradox, indicating the relationship that the characters and poet had with land and sea, while also reflecting the other paradoxes in the poem. The result is the desire to find balance within the paradoxes through the recognition of ongoing tension.
Date:
May 2008
Creator:
Fox, Bonnie L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
John Harbison's The Flight into Egypt: An Analysis for Performance
John Harbison's status as a significant contemporary American composer is confirmed by his numerous appointments, honorary degrees, and awards. He is the recipient of nearly every major composition award, with works performed by major orchestras and in important opera houses spanning the world. This paper examines in detail Harbison's most acclaimed choral work, the 1987 Pulitzer Prize-winning The Flight into Egypt. This study of the score is a "conductor's analysis," offering a musical guide for the conductor who seeks to perform this work. To provide a context for the discussion, Chapter 1 offers a brief biographical sketch of Harbison's life and career. Chapter 2 provides the analysis of the work and includes a history from commission to premier, a discussion of Harbison's selection of text, and an examination of the pitch organization which informs the piece. In Chapter 3, I present important rehearsal and performance implications to consider when undertaking a performance of the work. Interviews with two well-regarded conductors who have performed The Flight into Egypt, David Hoose and Patrick Gardner, and the composer himself, provide valuable insight into this discourse.
Date:
May 2008
Creator:
Galante, Brian Edward, 1974-
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Multifunctional Organic-Inorganic Hybrid Nanophotonic Devices
The emergence of optical applications, such as lasers, fiber optics, and semiconductor based sources and detectors, has created a drive for smaller and more specialized devices. Nanophotonics is an emerging field of study that encompasses the disciplines of physics, engineering, chemistry, biology, applied sciences and biomedical technology. In particular, nanophotonics explores optical processes on a nanoscale. This dissertation presents nanophotonic applications that incorporate various forms of the organic polymer N-isopropylacrylamide (NIPA) with inorganic semiconductors. This includes the material characterization of NIPA, with such techniques as ellipsometry and dynamic light scattering. Two devices were constructed incorporating the NIPA hydrogel with semiconductors. The first device comprises a PNIPAM-CdTe hybrid material. The PNIPAM is a means for the control of distances between CdTe quantum dots encapsulated within the hydrogel. Controlling the distance between the quantum dots allows for the control of resonant energy transfer between neighboring quantum dots. Whereby, providing a means for controlling the temperature dependent red-shifts in photoluminescent peaks and FWHM. Further, enhancement of photoluminescent due to increased scattering in the medium is shown as a function of temperature. The second device incorporates NIPA into a 2D photonic crystal patterned on GaAs. The refractive index change of the NIPA hydrogel as …
Date:
May 2008
Creator:
Garner, Brett William
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Analysis of Gay/Lesbian Instructor Identity in the Classroom
In this project I explore the connection between cultural and personal identity in the college classroom. Respondent interviews were conducted using open-ended questions, which began with a broad picture of the role the instructor played in the classroom and then focused more specifically on the issue of sexual orientation and the choices to disclose or not disclose orientation in the classroom. Thematic analysis was used to examine the interviews, upon the completion of the interviews being transcribed. RQ1: Do gay and lesbian instructors disclose their sexual orientation in the classroom? From this question, four themes emerged. These themes were disclosure not relevant, out of the classroom disclosure, students just know, and disclosure in the classroom. RQ2: What reasons do gay and lesbian instructors give for disclosing their sexual orientation in the classroom? Two themes, fears of disclosure and holding back, transpired from this question. RQ3: How do gay and lesbian instructors foster diversity in the classroom related to sexual orientation? Four themes were exposed from the question, and these themes were paradox of diversity, passing, mentoring, and identity not sexuality.
Date:
May 2008
Creator:
Giovanini, Heather
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Emergence of Complexity from Synchronization and Cooperation
The dynamical origin of complexity is an object of intense debate and, up to moment of writing this manuscript, no unified approach exists as to how it should be properly addressed. This research work adopts the perspective of complexity as characterized by the emergence of non-Poisson renewal processes. In particular I introduce two new complex system models, namely the two-state stochastic clocks and the integrate-and-fire stochastic neurons, and investigate its coupled dynamics in different network topologies. Based on the foundations of renewal theory, I show how complexity, as manifested by the occurrence of non-exponential distribution of events, emerges from the interaction of the units of the system. Conclusion is made on the work's applicability to explaining the dynamics of blinking nanocrystals, neuron interaction in the human brain, and synchronization processes in complex networks.
Date:
May 2008
Creator:
Geneston, Elvis L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The impact of the core knowledge curriculum at the junior high level as it relates to performance on the Texas Assessment of Knowledge and Skills.
The purpose of this study was to determine the impact of the comprehensive school reform model core knowledge on the reading achievement of eighth grade students located in a suburban north Texas school district. The data compared the mean scores on the Texas Assessment of Knowledge and Skills of students attending the experimental core knowledge school with the control school that did not use the core knowledge curriculum. Students from both schools were compared for student achievement gains overall as well as several other categories. The study also used a qualitative survey that asked key faculty members at both schools questions regarding levels of curriculum implementation, staff knowledge of curriculum, etc. The data showed no significant differences between student achievement scores at the experimental school compared with students at the control school. However, the study found that the type of standardized test seems to have an impact on whether students in a core knowledge curriculum show higher achievement than students in a traditional curriculum. Students in a core knowledge curriculum show higher achievement on norm-referenced standardized tests when compared with students not attending a core knowledge school. When taking a criterion-referenced test such as the Texas Assessment of Knowledge and …
Date:
May 2008
Creator:
Givens, Toby D.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The emergence of joint attention in a naturalistic parent training program.
Behaviors related to joint attention have been described by behavior analysts and developmental psychologists alike as having a distinctly social function. Children with autism often do not emit these behaviors. Research on the collateral effects of teaching joint attention suggests far reaching consequences. Given the reported benefits of using these behaviors, and the theoretical descriptions of their function, we assessed joint attention as a collateral effect of a naturalistic parent training program. Data suggest that although these behaviors were not directly targeted, they increased in all 3 children. Implications of parent training goals and child intervention targets are discussed in terms of a behavior analysis of joint attention and child development.
Date:
May 2008
Creator:
Goettl, Elizabeth J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Immediate and generalized effects of one component (Stay Close Tool) of a behavioral parenting curriculum.
The Essential Tools for Positive Behavior Change is a behavioral parenting curriculum that is currently being disseminated throughout the state and Florida and is now being utilized in Texas to teach parents who are at risk or are founded of abuse and neglect. Research on the curriculum thus far has focused on large scale outcomes, skill acquisition of caregivers during analog role-play assessments, and scores on a written quiz. Little research has focused on generalization of classroom performance to the home. The measurement systems that have been used to evaluate positive outcomes also were in need of improvement. The current study was designed to determine whether teaching a component (Stay Close) to typical parents resulted in immediate improvements in written exam scores and on a role-play assessment and if those skills could be seen in a home setting. The results indicated that small improvements were seen across quiz scores in all but one family and some improvements across behavior was seen in both the role-play and home observations. Additionally, a reliable measurement system was created that captured both home observations and role-play assessment data.
Date:
May 2008
Creator:
Greenspan, Michelle S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Deviant Behavior Among Young Adults: Turkish Case with an Emphasis on Family Rituals, Self-esteem and Religiosity.
The conduct of young adults has long been a concern in societies. The primary objective of this study was to gain greater understanding of what influences the deviant behavior of young adults in Turkey. Factors assessed in their background included family rituals, self-esteem, religiosity and deviant behavior. It was expected that levels of family rituals, religiosity, self-esteem and other risk factors would be significantly different between incarcerated youth and youth not incarcerated. Overall, these higher levels of family rituals, religiosity, and self-esteem plus lower levels of other risk factors were expected to negatively affect young people's engagement in deviant behavior in Turkey. Walter Reckless' containment theory provided a framework for this study. The non-probability sample of Turkish youths consisted of 205 incarcerated respondents and 200 college students. Each responded to four survey instruments, the Family Rituals Questionnaire, the Culture Free Self-Esteem Inventory, the Religious Background and Behavior Questionnaire, and a Family Information Inventory. Data were gathered cross-sectionally from January through March of 2007. The incarcerated respondents significantly practices less family rituals and had lower levels of religiosity than the college students but they did not differ significantly on self-esteem. Furthermore, overall participation in family rituals was associated with decreased likelihood …
Date:
May 2008
Creator:
Gunes, Ismail Dincer
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Exploring Trusted Platform Module Capabilities: A Theoretical and Experimental Study
Trusted platform modules (TPMs) are hardware modules that are bound to a computer's motherboard, that are being included in many desktops and laptops. Augmenting computers with these hardware modules adds powerful functionality in distributed settings, allowing us to reason about the security of these systems in new ways. In this dissertation, I study the functionality of TPMs from a theoretical as well as an experimental perspective. On the theoretical front, I leverage various features of TPMs to construct applications like random oracles that are impossible to implement in a standard model of computation. Apart from random oracles, I construct a new cryptographic primitive which is basically a non-interactive form of the standard cryptographic primitive of oblivious transfer. I apply this new primitive to secure mobile agent computations, where interaction between various entities is typically required to ensure security. I prove these constructions are secure using standard cryptographic techniques and assumptions. To test the practicability of these constructions and their applications, I performed an experimental study, both on an actual TPM and a software TPM simulator which has been enhanced to make it reflect timings from a real TPM. This allowed me to benchmark the performance of the applications and test …
Date:
May 2008
Creator:
Gunupudi, Vandana
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Negotiation, communication, and decision strategies used by hostage/crisis negotiators.
By conducting this theory-based empirical study, gathering data from working negotiators in the US and Canada, I have determined what primary dynamic activities, communication skills, and negotiation tools are used by hostage/crisis negotiators. Negotiators implement their negotiation and decision strategies differently depending on whether the situations they deal with are instrumental or expressive. I have determined which elements of negotiations and factors affecting negotiations differ while handling instrumental and expressive hostage situations. I found that the collected data did not reveal any significant relationship between handling instrumental/expressive hostage situations differently and belief in the elements of Brenda Dervin's and Shannon-Weaver's theories. I have also determined that the belief in the elements of the Dervin's and Shannon-Weaver's theories is workable and practical for negotiators to use. Based on the above findings, the model suggested by this research adds the elements and directives of Dervin's and Shannon-Weaver's models to the common approach used by the negotiators. This revised model suggests that the negotiators pay attention to the dynamics of the interactions presented between the two parties: the negotiators themselves and hostage takers. The revised model also recommends that the negotiators focus on not only the hostage takers behavioral characteristics, psychological conditions, and …
Date:
May 2008
Creator:
Hancerli, Suleyman
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effects of a "Responsive Teaching Strategy" to Increase Toy Play in Young Children with Autism in an Inclusive Setting.
Toy play represents one of many levels of play where children can expand their repertoires and socially interact with peers. Play typically increases in complexity as the child's repertoire develops; however, children with autism often have delayed play skills. The current study investigated the effects of using a 3-component play training procedure (choices, prompting, and consequences), replicated from a previous study, to increase simple and pretend toy play in three boys with autism. Additional measures were used to observe engagement with materials, children, and adults during a 10-minute session. Observations show increased toy play for two participants and increases in overall engagement for all participants. The findings suggest that the teaching program used is replicable across multiple populations, furthering the advancement of evidence-based practices.
Date:
May 2008
Creator:
Harder, Julianne M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Extermination Warfare? The Conduct of the Second Marine Division at Saipan
Historians John W. Dower, Craig Cameron, and Ronald Takaki argue that the Pacific War was a war of extermination fueled by race hate. Therefore, the clash between the military forces of the Japanese Empire and United States of America yielded a "kill or be killed" environment across the battlefields of the Pacific. This work examines the conduct of the Second Marine Division during its campaign of conquest against the Japanese held island of Saipan from June 15, 1944-July 9, 1944. It is based upon traditional military history sources to test their theories in context of the conduct of Marines toward Japanese soldiers and civilians during the Saipan campaign. Did Marines practice a war of extermination or conduct themselves in a humane manner?
Date:
May 2008
Creator:
Hegi, Benjamin P.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Influence of pre and post testing on return on investment calculations in training and development.
When expenses become an issue, training is often one of the first budget items to be cut. There have been a number of evaluation studies about rates of return from training interventions. Most results are based on interviewing participants about the value of the intervention and its effect on their productivity. This often results in quadruple digit return on investment indications. Decision makers who control the budget often view these kinds of results with skepticism. This study proposes a methodology to evaluate training interventions without asking participants their opinions. The process involves measuring learning through a series of pre-tests and post-tests and determining if scores on pre-tests can be used as predictors of future return on investment results. The study evaluates a series of return on investment scores using analysis of variance to determine the relationship between pre-tests and final return on investment results for each participant. Data is also collected and evaluated to determine if the financial results of the organization during the period of the training intervention could be correlated to the results of the training intervention. The results of the study suggest that the proposed methodology can be used to predict future return on investment from training …
Date:
May 2008
Creator:
Hiraoka, Calvin H.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Slaveholders and Slaves of Hempstead County, Arkansas
A largely quantitative view of the institution of slavery in Hempstead County, Arkansas, this work does not describe the everyday lives of slaveholders and slaves. Chapters examine the origins, expansion, economics, and demise of slavery in the county. Slavery was established as an important institution in Hempstead County at an early date. The institution grew and expanded quickly as slaveholders moved into the area and focused the economy on cotton production. Slavery as an economic institution was profitable to masters, but it may have detracted from the overall economic development of the county. Hempstead County slaveholders sought to protect their slave property by supporting the Confederacy and housing Arkansas's Confederate government through the last half of the war.
Date:
May 2008
Creator:
Houston, Kelly E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library