UNT Theses and Dissertations - 18,439 Matching Results

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Current Developments in the Exploitation of the Sea as a Source of Food

Description: The chronic problem of protein deficiency that prevails in many parts of the world today poses a great challenge to modern technology. Current production of protein food of animal origin is insufficient to meet the needs of an increasing world population. From this fact arises the possibility of a world in which the majority of people will never have enough to eat,
Date: June 1970
Creator: Goodman, Lonnie E.
Partner: UNT Libraries

Depression in Sixth-Grade Early Adolescents: Effects of Intimate Support, Relationship Conflict, and Self-Efficacy

Description: Depressive symptomology was examined in this study as a function of conflict and intimate support with parents, friends, and siblings among a non-clinical sample of 223 predominately white sixth-grade early adolescents. Moreover, sixth-graders' depressive symptomology was examined as a function of conflict management self-efficacy and intimate support self-efficacy. The purpose of the present study was twofold: 1) to explore the effects of intimate support and conflict in family and friend relationships on sixth-grade early adolescent depressive symptomology, 2) to determine whether poor conflict management skills self-efficacy and poor intimate support self-efficacy are linked with depressive symptomology in sixth-grade early adolescents. Friend relationship qualities had little impact on depression in sixth-graders. However, the presence of conflict and deficits in family intimate support, especially from parents, was associated with increased depression. Increased levels of depression also corresponded with lower ratings of conflict management self-efficacy and intimate support self-efficacy. Moreover, relationship difficulties combined with self-efficacy deficits to affect depression.
Date: August 1996
Creator: Goodness, Kelly R.
Partner: UNT Libraries

Retrospective Evaluation of Malingering: A Validational Study of the R-SIRS and CT-SIRS

Description: Empirically based methods of detecting retrospective malingering (i.e., the false assertion or exaggeration of physical or psychological symptoms reportedly experienced during a prior time period) are needed given that retrospective evaluations are commonplace in forensic assessments. This study's main objective was to develop and validate a focused, standardized measure of retrospective malingering. This objective was addressed by revising the Structured Interview of Reported Symptoms (SIRS), an established measure of current feigning. The SIRS' strategies were retained and its items modified to produce two new SIRS versions: The Retrospective Structured Interview of Reported Symptoms (R-SIRS) and The Concurrent-Time Structured Interview of Reported Symptoms (CT-SIRS). Forensic inpatients were used to test the R-SIRS (n = 25) and CT-SIRS (n = 26) which both showed good internal consistency and interrater reliability. The overall effectiveness of the R-SIRS and the CT-SIRS in the classification of malingerers and genuine patients was established in this initial validation study. Moreover, their classification rates were similar to those obtained by the SIRS. Pending additional validation, these measures are expected to increase the quality of forensic evaluations by providing the first standardized methods of assessing retrospective malingering.
Date: August 1999
Creator: Goodness, Kelly R.
Partner: UNT Libraries

Evaluation of Text-Based and Image-Based Representations for Moving Image Documents

Description: Document representation is a fundamental concept in information retrieval (IR), and has been relied upon in textual IR systems since the advent of library catalogs. The reliance upon text-based representations of stored information has been perpetuated in conventional systems for the retrieval of moving images as well. Although newer systems have added image-based representations of moving image documents as aids to retrieval, there has been little research examining how humans interpret these different types of representations. Such basic research has the potential to inform IR system designers about how best to aid users of their systems in retrieving moving images. One key requirement for the effective use of document representations in either textual or image form is thedegree to which these representations are congruent with the original documents. A measure of congruence is the degree to which human responses to representations are similar to responses produced by the document being represented. The aim of this study was to develop a model for the representation of moving images based upon human judgements of representativeness. The study measured the degree of congruence between moving image documents and their representations, both text and image based, in a non-retrieval environment with and without task constraints. Multidimensional scaling (MDS) was used to examine the dimensional dispersions of human judgements for the full moving images and their representations.
Date: August 1997
Creator: Goodrum, Abby A. (Abby Ann)
Partner: UNT Libraries

A Descriptive Law and Policy Analysis of Corporal Punishment in Florida Public School Districts

Description: Corporal punishment is banned by state statute in 31 of the 50 U.S states. The 19 states that still allow the practice are largely located in the South and the Rocky Mountain West. However, data indicate that the practice of corporal punishment is still largely a Southern phenomenon. In the 19 states that allow the practice to continue in schools, many have seen the use of the disciplinary technique decline. Existing research documents the negative effects and very little research supports any positive benefits of corporal punishment. This study analyzes school board policies from the 67 public school districts in the state of Florida to determine if trends in policies and incidents of corporal punishment are similar Texas and North Carolina. Research on Texas and North Carolina indicate corporal punishment is used more frequently in districts with smaller enrollments, and in more rural areas. Data from this study suggests that the decrease in the number of incidents of corporal punishment as well as the concentration of the practice among school districts in Florida school follows the same trends of declining use that exist in Texas and North Carolina public schools. Findings illustrate a need for continued research of corporal punishment on a district-by-district and potentially a school-by-school basis.
Date: December 2012
Creator: Goodson, Christopher B.
Partner: UNT Libraries

The Staging of the York Corpus Christi Play

Description: This study reaffirms the traditional theory of processional staging of the cycle of plays, collectively known as the Corpus Christi Play, that was performed at York in the fifteenth and sixteenth centuries. Because comparative studies of the various cycles are of little value, this thesis focuses on an examination of surviving civic records, as well as current scholarship, to confirm that the plays at York were performed processionally. An analysis of the relationship between the liturgical Corpus Christi procession and the Play indicates that the two, although concurrent, were separate events.
Date: May 1980
Creator: Goodspeed, Carolyn Fowlkes
Partner: UNT Libraries

Selected Characteristics of Minnie Stevens Piper Professors

Description: The problem of this study was the identification of selected characteristics of Minnie Stevens Piper Professors. Purposes of the study were: (a) to determine characteristics of Minnie Stevens Piper Professors, and (b) to determine whether these professors possess characteristics which typify outstanding college teachers as described by the Selection Research, Incorporated College Teacher Perceiver interview. Forty subjects, 20 from community colleges and 20 from senior colleges, were randomly selected from the 1978 through 1988 lists of Piper Professors. Fifteen community college and 11 senior college professors agreed to participate by being interviewed with the College Teacher Perceiver. This interview identified 13 characteristics, or themes, of excellent college teachers.
Date: May 1990
Creator: Goodwin, Gary D. (Gary Duane)
Partner: UNT Libraries

Microstructure Evolution in Laser Deposited Nickel-Titanium-Carbon in situ Metal Matrix Composite

Description: Ni/TiC metal matrix composites have been processed using the laser engineered net shaping (LENS) process. As nickel does not form an equilibrium carbide phase, addition of a strong carbide former in the form of titanium reinforces the nickel matrix resulting in a promising hybrid material for both surface engineering as well as high temperature structural applications. Changing the relative amounts of titanium and carbon in the nickel matrix, relatively low volume fraction of refined homogeneously distributed carbide precipitates, formation of in-situ carbide precipitates and the microstructural changes are investigated. The composites have been characterized in detail using x-ray diffraction, scanning electron microscopy (including energy dispersive spectroscopy (XEDS) mapping and electron backscatter diffraction (EBSD)), Auger electron spectroscopy, and transmission (including high resolution) electron microscopy. Both primary and eutectic titanium carbides, observed in this composite, exhibited the fcc-TiC structure (NaCl-type). Details of the orientation relationship between Ni and TiC have been studied using SEM-EBSD and high resolution TEM. The results of micro-hardness and tribology tests indicate that these composites have a relatively high hardness and a steady-state friction coefficient of ~0.5, both of which are improvements in comparison to LENS deposited pure Ni.
Date: December 2010
Creator: Gopagoni, Sundeep
Partner: UNT Libraries

Probabilistic Analysis of Contracting Ebola Virus Using Contextual Intelligence

Description: The outbreak of the Ebola virus was declared a Public Health Emergency of International Concern by the World Health Organisation (WHO). Due to the complex nature of the outbreak, the Centers for Disease Control and Prevention (CDC) had created interim guidance for monitoring people potentially exposed to Ebola and for evaluating their intended travel and restricting the movements of carriers when needed. Tools to evaluate the risk of individuals and groups of individuals contracting the disease could mitigate the growing anxiety and fear. The goal is to understand and analyze the nature of risk an individual would face when he/she comes in contact with a carrier. This thesis presents a tool that makes use of contextual data intelligence to predict the risk factor of individuals who come in contact with the carrier.
Date: May 2017
Creator: Gopala Krishnan, Arjun
Partner: UNT Libraries

An Empirical Study on the Use of Promotion in Hospitals

Description: The role of marketing and marketing communication in hospitals has grown in the last decade. The need for hospitals to make careful decisions about their marketing communication efforts is mandated, given the changes taking place in the hospital industry. The purpose of this dissertation was to conduct empirical research to determine whether for-profit and non-profit hospitals perceive and utilize promotion as a marketing strategy element. The two steps taken included: identifying important factors considered by hospital administrators and marketing staff in the development of communication messages designed for patients, hospital staff and medical staff; and testing the factors developed and studying the attitudes of hospital personnel toward promotion using a national sample of hospitals. In phase 1, focus group interviews were conducted in a surrogate for-profit hospital and a surrogate non-profit hospital. In phase 2, an original mail questionnaire was used to collect data from a sample of 80 hospitals. A total of 38 hospitals participated, providing 114 usable responses. Test statistics included content analysis, Chi-Square, Pearson correlation coefficient and Analysis of Variance. The results of the focus group study indicated the practice of marketing in hospitals is in its early growth stages and marketing is viewed as nothing more than advertising and public relations. The results of the mail survey indicated that respondents in small for-profit hospitals with 20 to 30 years of experience as professionals, with key decision making authority, are favorably disposed to marketing and marketing communication. It was also found that respondents in large non-profit hospitals are very positive towards marketing. In contrast, respondents in medium and large for-profit hospitals, who are not directly involved in decision making, tend to be less positive towards marketing. The study serves as a basis for future research which may involve, (1) a larger sample frame, (2) hospitals in inner-city ...
Date: December 1988
Creator: Gopalakrishna, Pradeep
Partner: UNT Libraries

Market Reactions to Accounting Policy Deliberations the Case of Pensions (SFAS No. 87)

Description: This study had two basic objectives. The first was to determine the stock market reactions to the pension policy deliberations. The second was to further our understanding of the significance of the FASB's due process. The author selected 13 critical events that preceded passage of SFAS No. 87 and designed a quasi experiment to examine the stock market reaction around the above events. Two portfolios were constructed to test the hypotheses. The first portfolio consisted of firms in the experimental group (firms sponsoring a defined benefit pension plan) and the second portfolio consisted of firms in the control group (firms sponsoring a defined contribution pension plan). The two portfolios were matched on the basis of SIC code, debt to equity ratio and assets.
Date: December 1986
Creator: Gopalakrishnan, Venkataraman
Partner: UNT Libraries

Analysis of Thermoplastic Polyimide + Polymer Liquid Crystal Blends

Description: Thermoplastic polyimides (TPIs) exhibit high glass transition temperatures (Tgs), which make them useful in high performance applications. Amorphous and semicrystalline TPIs show sub-Tg relaxations, which can aid in improving strength characteristics through energy absorption. The a relaxation of both types of TPIs indicates a cooperative nature. The semicrystalline TPI shows thermo-irreversible cold crystallization phenomenon. The polymer liquid crystal (PLC) used in the blends is thermotropic and with longitudinal molecular structure. The small heat capacity change (ACP) associated with the glass transition indicates the PLC to be rigid rod in nature. The PLC shows a small endotherm associated with the melting. The addition of PLC to the semicrystalline TPI does not significantly affect the Tg or the melting point (Tm). The cold crystallization temperature (Tc) increases with the addition of the PLC, indicating channeling phenomenon. The addition of PLC also causes a negative deviation of the ACP, which is another evidence for channeling. The TPI, PLC and their blends show high thermal stability. The semicrystalline TPI absorbs moisture; this effect decreases with the addition of the PLC. The absorbed moisture does not show any effect on the degradation. The addition of PLC beyond 30 wt.% does not result in an improvement of properties. The amorphous TPI + PLC blends also show the negative deviation of ACP from linearity with composition. The addition of PLC causes a decrease in the thermal conductivity in the transverse direction to the PLC orientation. The thermomechanical analysis indicates isotropic expansivity for the amorphous TPI and a small anisotropy for the semicrystalline TPI. The PLC shows large anisotropy in expansivity. Even 5 wt. % concentration of PLC in the blend induces considerable anisotropy in the expansivity. Thus, blends show controllable expansivity through PLC concentration. Amorphous TPI + PLC blends also show excellent film formability. The amorphous TPI ...
Date: May 1998
Creator: Gopalanarayanan, Bhaskar
Partner: UNT Libraries

A Study of the Functional Competencies of Southern Baptist Missionaries Who Originate Indigenous Churches in the Philippines

Description: This study was designed to identify the functional competencies necessary for a missionary to plant churches in the Philippines, to identify how those competencies can be recognized in individual missionaries, and to determine the percentage of personnel who possess specific functional competencies.
Date: December 1993
Creator: Gopffarth, William
Partner: UNT Libraries

The Impact on Achievement from Student and Parent Attitudes towards Using Smartphones in School

Description: The purpose of this research was to determine what type of correlations existed between student and parent attitudes towards using smartphones in school and the resulting impact on achievement, specifically for low-achieving students. Participants in the study were third-grade students and their parents from a primary school in Singapore. The study employed a quantitative analysis to understand the correlations among the different participant groups. The instruments used were Likert-based surveys, along with scores from mid-year and end-of-year achievement exams in English and science. The three most relevant major findings showed that (a) low-achieving students show a positive attitude toward completing science activities, which correlates with an increase in science achievement; (b) the parents of low-achieving students appear to provide their children with autonomy in using their smartphones, which correlates with an increase in science achievement; and (c) having a smartphone and using the smartphone to complete school work is important to low-achieving students and their parents.
Date: December 2016
Creator: Gordesky, Joshua
Partner: UNT Libraries

Corporate Sale-and-Leaseback Transactions: An Examination of Corporate Incentives, Wealth Effects and Dealer Spreads

Description: There is a limited amount of research dealing with the wealth effects of sale-and-leaseback transactions, but previous research has focused predominantly on the tax effects of these transactions. The results of these studies have often been in conflict with one another. This dissertation shows that tax effects do play a role in determining the wealth effect of sale-and-leasebacks on stockholders, but there exists a framework of finance research that suggests several other factors could play a determining role as well.
Date: August 1993
Creator: Gordon, Bruce L. (Bruce Lee)
Partner: UNT Libraries

The effects of diphenylhydantoin on the lymphoreticular tissues of the rat

Description: A study was made of the effects of diphenylhydantoin (DPH) and the carrier solution on the spleen, lymph node, and thymus. DPH was injected i.p. at concentrations of 5 and 10 mg./100gm. for 30 and 60 days. Hematologic effects observed were leucocytosis, neutrophilia, eosinophilia, and lymphopenia. Respiratory measurements of lymph node tissue slices were made using the oxygen electrode method.
Date: August 1976
Creator: Gordon, Charles K.
Partner: UNT Libraries

Organizational Rhetoric in the Academy: Junior Faculty Perceptions and Roles

Description: The purpose of this project was to examine the perceptions of junior faculty members as they relate to roles and expectations related to the tenure process. The study utilized a mixed methods approach to gain a multifaceted perspective of this complex process. I employed a quantitative and qualitative survey to explore junior faculty perceptions regarding roles related to promotion and tenure policies. In addition, I conducted fantasy theme analysis (FTA) to explore the organizational rhetoric related to these policies. Findings from the study illustrate the continued presence of the "publish or perish" paradigm, as well as issues related to role conflict within the context of organizational rhetoric.
Date: December 2008
Creator: Gordon, Cynthia K.
Partner: UNT Libraries

Trade negotiations in agriculture: a comparative study of the US & the EC

Description: This study applies Destler's institutional counterweights to Putnam's two-level analysis, substituting Liberal Institutionalism and Realism for internationalism and isolationism, in a comparative case study of the roles played by the United States and the European Economic Community in multilateral trade negotiations in agriculture under the aegis of the General Agreement for Tariffs and Trade during the first half of the Uruguay round.
Date: December 1994
Creator: Gordon, H. William (Harold William)
Partner: UNT Libraries

Employment of the Rorschach Inkblot Test with the Devries Suicide Inventory

Description: This investigation represents an attempt to employ the Devries Suicide Prediction Scale and the Rorschach Inkblot Test in a two-stage predictive model which was designed to decrease the high false positive rate associated with the Devries and to design a way in which the Rorschach could be used efficiently in suicide prediction in a large mental hospital setting. The Rorschach was not found to significantly improve the predictive ability of the Devries. An unexpectedly high percentage of mental patients in the study, thirty-eight percent, admitted to previous suicide attempts, raising the question of whether suicidal behavior is not more common than is usually thought.
Date: May 1976
Creator: Gordon, James L.
Partner: UNT Libraries