UNT Theses and Dissertations - 59 Matching Results

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Biogeographic Relationships of Pocket Gophers (Geomys breviceps and Geomys bursarius) in the Southeastern Portion of Their Ranges

Description: This research utilized population genetic analyses (protein starch-gel electrophoresis and DNA sequencing of the cytochrome b mtDNA gene), host-parasite specificity (lice coevolution), remote sensing of satellite data, and geographic information systems (GIS) to characterize newly discovered populations of pocket gophers (genus: Geomys) in Arkansas. These populations are isolated and occur in seemingly unsuitable habitat in the Ozark Mountains of Arkansas. Analyses of electrophoretic and ectoparasite data suggested the populations in the Ozark Mountains represented isolates allied to Geomys bursarius, a species not known to occur in Arkansas. Comparison of mitochondrial DNA sequence data of the cytochrome b gene with that of other taxa and morphometric analyses confirmed that these populations are most closely allied to G. bursarius occurring to the north in Missouri. Moreover, these mtDNA sequence analyses indicated a degree of differentiation typical of that between other subspecies of pocket gophers. Therefore, these populations represent a distinct genetic entity in an intermediate stage of speciation and should be designated as a new subspecies, Geomys bursarius ozarkensis. Molecular clock analysis revealed a time of lineage divergence for this new subspecies as approximately 511,000 YBP. Due to the isolated nature and limited distribution of this subspecies, an evaluation of critical habitat needs was initiated. Remote sensing and GIS technologies were used to identify and describe suitable habitat Computerized classification of satellite imagery of suitable vegetation, integrated with ancillary digital information on soil associations, roads, and water systems, revealed that human activity had played a positive role in the establishment and dispersal of pocket gophers in this area. This research represents an initial combination of classical systematic tools with remote sensing and GIS to investigate biogeographic patterns and evolution. This project establishes a framework for using an interdisciplinary approach to studying organisms with limited distributions, determining evolutionary status, and providing recommendations for ...
Date: August 1998
Creator: Elrod, Douglas Allen
Partner: UNT Libraries

Analyses of Particulate Contaminants in Semiconductor Processing Fluids

Description: Particle contamination control is a critical issue for the semiconductor industry. In the near future, this industry will be concerned with the chemical identities of contaminant particles as small as 0.01 pm in size. Therefore, analytical techniques with both high chemical sensitivity and spatial resolution are required. Transmission electron microscopy (TEM) provides excellent spatial resolution and yields structural and compositional information. It is rarely used, however, due to the difficulty of sample preparation. The goals of this research are to promote the use of TEM as an ultrafine particle analysis tool by developing new sample preparation methods, and to exploit the new TEM techniques for analysis of particles in semiconductor processing fluids. A TEM methodology for the analysis of particulate contaminants in fluids with an elemental detectability limit as low as 0.1 part per trillion (ppt), and a particle concentration detectability limit as low as 1 particle/ml for particles greater than 0.2 pm was developed and successfully applied to the analysis of particles in HF, H202, de-ionized (DI) water, and on the surface of an electronic device. HF samples from three manufacturers were examined. For HF (B), the maximum particle concentration was 8.3 x 103 particles/ml. Both a viscous material and lath-shaped particles were observed. The Sb concentration was less than 0.6 part per billion (ppb). HF (C) was the cleanest. CaF2 and TiO2 particles were identified in HF (D). For H2 02, iron and tin oxides and hydroxides were identified. The maximum particle concentration was 990 particles/ml. The Sn and Fe concentrations were less than 0.3 ppb. Spherical and dendritic particles were observed. For DI water, spherical and dendritic particles (<2 particles/ml), and particles containing Fe or Si with concentrations less than 0.1 ppt were observed. Contaminants on an electronic device surface were also analyzed. Clusters of small particles ...
Date: August 1998
Creator: Xu, Daxue
Partner: UNT Libraries

Non-Academic Institutional Variables Related to Degree Completion of Non-Traditional Age Undergraduate Students

Description: A study was conducted at The University of Texas at Arlington to obtain measurements of non-traditional age undergraduate students using the Mattering Scales for Adult Students in Higher Education (MHE). The MHE is designed to assess the perceptions of adult students on how much they matter to the institution they are attending. The study also sought to determine if "mattering" and other selected nonacademic variables associated with the university environment are perceived by nontraditional age students to effect their likelihood of completing their baccalaureate degree. Of the five subscales surveyed by the MHE, significant statistical differences were found to exist in the Administration, Interaction With Peers, Multiple Roles, and Faculty subscales denoting an interaction between gender and minority status. Significant statistical differences were also found by gender on the Advising subscale and by minority status on the Faculty subscale.
Date: August 1998
Creator: Walts, Rebecca Ann.
Partner: UNT Libraries

MMPI-2 Patterns of Adults with Attention-Deficit Hyperactivity Disorder

Description: Recent literature suggests that not only does Attention-deficit Hyperactivity Disorder (ADHD/ADD) persist into adulthood, but it can also be accompanied by personality characteristics which cause emotional difficulties. In fact, adults diagnosed with ADHD can present with a profusion of difficulties. Several constructs appear to accumulate dynamically throughout development to place the adult with ADHD at risk for multiple emotional problems. These interwoven influences include familial characteristics, childhood emotional and academic difficulties, and inadequate coping skills to respond to adulthood pressures. This document, first, describes a developmental model for conceptualizing negative trajectories leading to nonadaptive coping and psychopathology and identifies personality factors of adults diagnosed with ADHD. This model provides clinicians and researchers with a better understanding of the complexity and challenges of adulthood ADHD in order to aid in diagnosis, treatment, and prevention. The purpose of this study is to examine personality factors common to adults diagnosed with ADHD and compares these characteristics with a group of adults diagnosed with a depressive disorder. Adults responding to a community advertisement who provided documentation of the diagnosis of Attention-deficit Hyperactivity Disorder were administered the MMPI-2. This ADHD group was compared with MMPI-2 profiles of a group of adults diagnosed with Major Depressive Disorder or Dysthymic Disorder. A cluster analysis procedure was performed and results are discussed.
Date: August 1998
Creator: Campbell, Catherine Elaine
Partner: UNT Libraries

The Effects of an Experimentally-Induced Bodily Focus Experience on a Psychotherapist during a Psychotherapy Session

Description: The purpose of this study is to contribute to the current process research by investigating a psychotherapist's experience during psychotherapy. Massage therapy and relaxation therapy were used to manipulate psychotherapist's bodily focus, physiology, and affective state. Topics discussed include: the bodily focus of the therapist, neurobiological models of experience, mind-body boundary issues, and a present-time focus. Doctoral level Counseling and Clinical graduate students were used as participants.
Date: August 1998
Creator: Koehler, Gregory C. (Gregory Charles)
Partner: UNT Libraries

Pedagogical and Andragogical Principles of John Wesley's Anthology

Description: This study is a historical and philosophical analysis of significant educational concepts John Wesley espoused during his lifetime from 1703-1791. Specifically this document examines Wesley's use of pedagogical and andragogical principles through the educational undertakings of the early Methodist movement.
Date: August 1998
Creator: Hall, Elaine Friedrich
Partner: UNT Libraries

Hormones, Distress, and Immune Functioning in Women

Description: The present study set out to investigate the biopsychosocial model of illness using variables previously identified as directly impacting illness or as mediating the relationship between other variables and illness. Oral contraceptive use, stress, and negative affect were investigated as predictors of immunological competence, measured by the level of Immunoglobulin G antibodies to Epstein-Barr Virus Viral Capsid Antigen (EBV-VCA IgG).
Date: August 1998
Creator: Rubino-Watkins, Maria Francesca
Partner: UNT Libraries

Use of Stufflebeam's CIPP Model to Assess a Change Effort in a Division of a University Library

Description: Reorganization efforts within colleges and universities are increasingly considered as institutions look for ways to streamline operations for financial cost savings or competitive advantage. The purpose of this study was to assess a particular change effort in a university library which took place between August, 1996 and July, 1997. A team was formed to manage the change effort, and an outside consultant was hired to facilitate the process and guide the team. Stufflebeam's evaluation model was used as a conceptual framework to evaluate the entire process which included a particular change management model brought in by the consultant. The entire change effort was described by the author as a participating member of the team and assessed by gathering feedback from team members, library staff members affected by the effort, and members of the library administration.
Date: August 1998
Creator: Dworaczyk, William J.
Partner: UNT Libraries

Group Decision-Making in Computer-Supported Cooperative Work Environments

Description: Computer-Support Cooperative Work (CSCW) reflects the change in emphasis from using computers to solve problems to using computers to facilitate human interactions. Most studies, however, have focused on the use of the technology rather than on the human-human interaction (HHI) in these environments due to: the varied perspectives of the investigators; and the lack of a consistent variables. Although numerous studies exist on a variety of products, only limited research has been conducted with the most prevalent of the technologies in the marketplace, Lotus Notes™. This field study, conducted using Lotus Notes™, operationalizes a model proposed, but not tested, for the study of group decision-making in CSCW environments put forth by Kraemer and Pinsonneault (1990). This study examines the use of CSCW in the group decision-making process, the participation rate for group decision-making in CSCW environments, and the criteria for determining quality in group decisions in CSCW environments. The study also proposes a new perspective for examining technology using the human context, recommends extensions for the group study framework and explores areas for future research.
Date: August 1998
Creator: Ayala-Bush, Mary T. (Mary Theresa)
Partner: UNT Libraries

Peer Mediation: an Empirical Exploration Empowering Elementary School Children to Resolve Conflicts Constructively

Description: Conflict is inevitable in school and in life. Many children lack skills necessary to resolve daily conflicts constructively. Without knowledge of positive ways to manage conflicts, violence may result. Limited research suggests that involvement in a peer mediation program may have a positive influence on children. This study assessed effects peer mediation training and mediation experience had on student mediators. The pretest-posttest, control-group, and quasi-experimental study investigated the effects of a year long peer mediation program implemented in a suburban elementary school.
Date: August 1998
Creator: Link, Kathleen Elizabeth Barbieri
Partner: UNT Libraries

A Study of Relationships Between University Interscholastic League Participation and Selected School Characteristics

Description: The problem of this study was to determine whether differences exist between elementary and middle school campuses that participate in University Interscholastic League (UIL) academic activities and similar campuses that do not participate. The Texas Education Agency Academic Excellence Indicator System (AEIS) furnished data from 1993 through 1997 for this ex post facto comparative research. Using all Texas Assessment of Academic Skills (TAAS) scores for grades 3 through 8, economically disadvantaged population data, attendance rates and campus accountability ratings, 12 hypotheses and 4 research questions were addressed.
Date: August 1998
Creator: Wisdom-Walters, Patricia Bowen
Partner: UNT Libraries

Circumfusion: a Composition for Real-Time Computer Music Spatialization System

Description: Two of the leading methodologies for spatializing audio over multiple channels include non-real-time multi-track tape and variations of real-time systems that often involve complex configurations of hardware. Of the latter, composers relying on MIDI as a control source have used pairs of sound modules, effects units and automation capable mixers to achieve spatialization over four loudspeakers. These systems typically employ intensity panning, Doppler shifts and reverberation. The present research details the development of a compact spatialization system using a MAX patch controlling a Kurzweil K2500 sampler. This system supports real-time diffusion of up to six simultaneous sound files over eight loudspeakers while incorporating intensity panning, Doppler shifts, delays and filtering. The MAX patch allows composers to choose from several automatic sound spatialization trajectories or to use the mouse to draw and store their own trajectories for later playback. The piece, Circumfusion, is an eighteen-minute composition of electroacoustic music utilizing this spatialization system.
Date: August 1998
Creator: Morgan, Christopher R. (Christopher Robert)
Partner: UNT Libraries

An Empirical Investigation of Personal and Situational Factors That Relate to the Formation of Entrepreneurial Intentions

Description: New entrepreneurial organizations emerge as a result of careful thought and action. Therefore, entrepreneurship may be considered an example of planned behavior. Previous research suggests that intentions are the single best predictor of planned behavior. Given the significance of intentions, the purpose of this study was to investigate the relationships between the personal characteristics of the entrepreneur and perceived environmental factors, and entrepreneurial intentions.
Date: August 1998
Creator: Summers, David F. (David Frederic), 1948-
Partner: UNT Libraries

Prediction of Achievement Scores for Adult Learners Using the Productivity Environmental Preference Survey (PEPS): an Exploratory Study

Description: This study attempted to determine, given an individual's learning environment preference as determined by Alone/Peer Oriented scale of the Productivity Environmental Preference Survey (PEPS), if achievement scores could be predicted when given either an individual or a peer-group teaching environment. Participants were graduate students (n = 18) enrolled in a graduate course.
Date: August 1998
Creator: Ison, William T. (William Travis)
Partner: UNT Libraries

Adult Attention Deficit Hyperactivity Disorder Personality Characteristics and Comorbidity

Description: Attention-deficit/hyperactivity disorder (ADHD) is surrounded by confusion and controversy regarding its definition, course, etiology and treatment. Among adults, ADHD is rarely considered a diagnostic reality of primary importance and is often overlooked. This study provides descriptive validity for adult ADHD in distinguishing it from controls, and identifying both a pure condition and one wrought with comorbidity.
Date: August 1998
Creator: Austin, Karla Michele
Partner: UNT Libraries

Validation of the Expanded McCarron-Dial System for Diagnosis of Neuropsychological Dysfunction in Adults

Description: The McCarron-Dial System (MDS) has successfully predicted vocational and independent living outcomes with neuropsychologically disabled individuals receiving rehabilitation services. In addition, preliminary validation studies suggest that the abbreviated MDS is useful for clinical neuropsychological diagnosis. The present study represents part of an ongoing research project aimed at validating the expanded version of the MDS for diagnosis of neuropsychological dysfunction. Specifically, it was hypothesized that the expanded MDS would be able to accurately discriminate between brain-damaged and non-brain-damaged individuals. Accurate diagnosis facilitates rehabilitation efforts for individuals with neuropsychological disabilities and the data profile provided by the expanded version of the MDS can consequently form the basis from which more complete individual treatment and rehabilitation plans can be conceptualized.
Date: August 1998
Creator: Colaluca, Beth
Partner: UNT Libraries

Organizational Support Systems for Team-Based Organizations: Employee Collaboration through Organizational Structures

Description: The purpose of this study was to examine relationships between organizational support and Effectiveness, Empowerment, and team characteristics. Support was operationalized by nine systems: Executive Management, Direct Supervision, Group Design, Performance Definition, Performance Review, Training, Rewards, Information, and Integration. Support was rated in two ways: how important is support for performing work (Importance scales), and how does support describe work environments (Presence scales).
Date: August 1998
Creator: Hall, Christopher Aaron, 1964-
Partner: UNT Libraries

Conceptual Structure of HIV+ Women With PTSD: Trauma Construct Elaboration

Description: Human immunodeficiency virus (HIV) can result in posttraumatic stress disorder (PTSD) as events related to illness act as traumatic stressors. This study tested some basic hypotheses of Sewell and Cromwell's personal construct model of PTSD in HIV+ women both with and without diagnoses of PTSD. Trauma-related constructs of HIV+ women with PTSD with HIV+ non-PTSD controls at varying stages of illness were compared. The elaboration, rankings, and valence of trauma-related constructs were examined using the Life Events Repertory Grid (LERG) procedure. Findings provided evidence that a clinical diagnosis of PTSD in women was not associated with the degree of construct elaboration. These findings may imply a qualitative difference in cognitive processing of social stressors and violent stressors.
Date: August 1998
Creator: Jones, Deborah (Deborah Lynne), 1958-
Partner: UNT Libraries

Filial Therapy with Non-Offending Parents of Children Who Have Been Sexually Abused

Description: This study was designed to determine the effectiveness of filial therapy as a method of intervention for non-offending parents and their children who have experienced sexual abuse. Filial therapy is a didactic/dynamic approach used by play therapists to train parents to be therapeutic agents with their children. Parents are taught basic child-centered play therapy skills and the utilization of these skills in weekly play sessions with their children. Parents learn to create a special environment which enhances and strengthens the parent-child relationship, thus assisting in personal growth and change for both the parent and child. The purpose of this study was to determine if filial therapy is effective in: (a) increasing the acceptance of non-offending parents of their sexually abused children; (b) reducing the stress level of non-offending parents; (c) improving empathic behaviors of non-offending parents toward their sexually abused child; (d) decreasing the anxiety of sexually abused children; (e) enhancing the self-concept of sexually abused children; (f) decreasing behavior problems of sexually abused children as reported by their non-offending parents; and (g) enhancing the emotional adjustment of sexually abused children.
Date: August 1998
Creator: Costas, Mary Bassett
Partner: UNT Libraries

The Apostasy (and Return) of Lenny Gorsuch

Description: This comic romantic novel engages the question of how the Christianity of the southern, fundamentalist world of the Texas bible belt, finding its primary cultural assumptions about human existence challenged by the more confusing elements of a modern sensibility, a sensibility over-laden with strange-attractors, mechanistic psychologies, relativistic physics and ethics, evolutionary premises, newly proclaimed rights and freedoms, a deterioration in cultural political naivete, and the advent of an increasingly incomprehensible set of technologies, can survive. The "central" character is a young, slightly deformed man raised by his ostensibly "Christian" grandparents who, through a rather odd set of legal circumstances and physical events, not only become wealthy, but somewhat powerful in their immediate community. He finds himself involved with a young woman, raised in an equally "Christian" household, but, as is true of any romantic plot, the relationship between the two is destined, by virtue of circumstance and the meddling of other characters, to struggle and mishap. In the end, the text, in its own fashion, asserts that the Christian impulse can survive the modern era by virtue of one of its central tenets: faith, in the Christian world, is very much the same as life itself, a process of waiting and expecting. Its greatest threat, rather than something intrinsic to the modern period, is perhaps that of the dogmatism and misunderstanding of the characters who most loudly proclaim it to others.
Date: August 1998
Creator: Guidici, Guy R.
Partner: UNT Libraries

Strategies Employed by School Administrators to Prevent or Reduce Gang-Related Activity and Violence in Selected High Schools in a North Central Texas School District

Description: This research investigated the strategies used by school administrators in selected high schools to prevent or reduce gang-related activity and violence. Interviews were conducted with six high school principals, six assistant principals, fifteen staff members and eleven students. All of the students were gang members. The results of the study showed that there are gang members in all schools, but that their gang activity at school is curtailed by some specific strategies.
Date: August 1998
Creator: Wood, Sherree F.
Partner: UNT Libraries

An Investigation of Factors Affecting Test Equating in Latent Trait Theory

Description: The study investigated five factors which can affect the equating of scores from two tests onto a common score scale. The five factors studied were: (a) distribution type (i.e., normal versus uniform); (b) standard deviation of itemdifficulties (i.e., .68, .95, .99); (c) test length or number of test items (i.e., 50,100, 200); (d) number of common items (i.e., 10,20,30); and (e) sample size (i.e., 100, 300, 500). The significant two-way interaction effects were for common item length and test length, standard deviation of item difficulties and distribution type, and standard deviation of item difficulties and sample size.
Date: August 1998
Creator: Suanthong, Surintorn
Partner: UNT Libraries

Influence of Current Parent-Child Relationships on Dating Motivations in Young Adulthood

Description: The purpose of this study was to explore how supportive functions of parent-child relationships influence young adult dating motivations and involvement. Theoretical literature suggests that emotionally supportive homes provide a secure base for children to depend on as they explore themselves and other relationships. However, problematic family ties could be expected to inhibit relationship involvement due to negative past experiences or to encourage involvement as a search for intimacy. A sample of 206 single, female undergraduates completed questionnaires assessing relationships with parents and aspects of romantic involvement and development. The set of Parent-Child Relationship variables included Support, Conflict, Depth, and Affective Quality in relationships with mother and father. The Attachment Related Dating Motivation variables included measures of Anxiety, Dependency, and Closeness in relationships, Attachment Motivation, Sexual Expression, Dating Exploration, Behavioral Indicators of Romantic Involvement, Sexual Involvement, and Level, Satisfaction, and Importance of Romantic Involvement.
Date: August 1998
Creator: Butcher, Karen H. (Karen Hunt)
Partner: UNT Libraries

An Adult Educational Research Model for Developing an Evaluation System for Clergy

Description: Formal job performance evaluation of a church's pastoral staff has been almost nonexistent in many churches. While business and education have been making strides in evaluation techniques during the past three decades, the church is just beginning to notice the need for this kind of accountability and ongoing professional development. In this research, the author applied the evaluation techniques of education to church pastoral staff members. Evaluation can be understood as both a formative process and a summative decision. The steps to planning an evaluation that will be both formative and summative are discussed. Qualifying the ministerial tasks through objective job descriptions will enable the church to quantify the job performance through evaluation. Suggestions are given for developing a ministerial evaluation instrument. In this research a model from educational evaluation was adapted for use in a local church setting. One denomination was selected to demonstrate the process of evaluation development. Denominational governments differ considerably. Therefore, the key stakeholders of the church for the chosen denomination were identified as pastors and church board members. These stakeholders were used as a "panel of experts." The Delphi technique was used to develop consensus from the participants concerning (1) the core skills of ministerial effectiveness and (2) the quality indicators to measure those core skills. This required two rounds, one for identifying the core skills and one for identifying quality indicators. Each round consisted of three surveys. The research identified seven core skills for ministerial effectiveness and a number of quality indicators to measure each core skill. The results were used to demonstrate how an evaluation tool could be developed from the data. This evaluation tool was the consensus of the panel of experts in this study. While the process is a model that could be similar for any church's "panel" of participants, the ...
Date: August 1998
Creator: Burnside, Burnie R.
Partner: UNT Libraries