UNT Theses and Dissertations - 218 Matching Results

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Aspartate Transcarbamoylase of Aeromonas Hydrophila

Description: This study focused on the enzyme, aspartate transcarbamoylase (ATCase) from A. hydrophila, a Gram-negative bacterium found in fresh water. The molecular mass of the ATCase holoenzyme from A. hydrophila is 310 kDa. The enzyme is likely composed of 6 catalytic polypeptides of 34 kDa each and 6 regulatory polypeptides of 17 kDa each. The velocity-substrate curve for A. hydrophila ATCase is sigmoidal for both aspartate and carbamoylphosphate. The Km for aspartate was the highest to date for an ente… more
Date: December 2000
Creator: Higginbotham, Leah
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Assessment of the Effects of Interpersonal Openness and Coping Resources on the Psychological Sequelae of Traumatic Victimization

Description: The present study tested a model addressing whether interpersonal Openness and interpersonal and intrapersonal Coping Resources mediated the relationship between interpersonal Victimization and the Psychological Symptoms women experience as a result of these traumas. Victimization indicators (physical violence, sexual assault, psychological abuse, and revictimization), Coping indicators (optimism, self-esteem, private self-consciousness, social network and therapy), Openness indicators (self-si… more
Date: December 2000
Creator: Sedillo, Diane Marie
Item Type: Refine your search to only Thesis or Dissertation
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Assessment of the Efficacy of a Constructed Wetland to Reduce or Remove Wastewater Effluent Estrogenicity and Toxicity Using Biomarkers in Male Fathead Minnows (Pimephales Promelas Rafinesque, 1820)

Description: Vitellogenin in Pimephales promelas was used to assess estrogenicity of a local municipal effluent. Vitellogenin induction in male P. promelas increased in frequency and magnitude with increased exposure duration and was greater ("=0.05) than controls after 2 and 3 weeks of exposure. The level of vitellogenesis induced by effluent exposure was high compared to similar studies. A spring season evaluation followed. Biomarkers in P. promelas were used to assess the efficacy of a treatment wetland … more
Date: December 2000
Creator: Hemming, Jon M.
Item Type: Refine your search to only Thesis or Dissertation
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Attitudes and Behaviors Toward Weight, Body Shape and Eating in Male and Female College Students

Description: The purpose of this investigation was to assess the association between body mass index as well as race/ethnicity and established correlates of disordered eating including drive for thinness, body dissatisfaction, bulimia, dietary restraint and social physique anxiety in male and female college students. Difference between actual, desirable and perceived body weight was also assessed. ANOVA suggested that as actual body mass index increased, in general, attitudes and behavior toward weight, bod… more
Date: December 2000
Creator: Lofton, Stacy L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Behavioral Economic Analysis of Different Reinforcers: Sound-Clips Versus Points Exchangeable for Money

Description: Human operant studies frequently use points exchangeable for money as reinforcers. Some studies employ more immediately consumable reinforcers to emulate properties of food reinforcers. This study examined demand for points/money and for sound-clips to compare their economic characteristics. Across four participants, demand was often higher and less elastic for points/money than for sounds. During subsequent exposures at each response requirement, demand for sounds often decreased to a greater … more
Date: December 2000
Creator: Alvey, Debi A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Behavioral Economic Analysis of the Demand for Money in Humans

Description: This study investigated the effects of unit price structure, unit price descriptions, and unit price sequence on the demand for money in humans. Six groups of 3 participants solved multiplication problems in exchange for money under various unit prices. Consumption of money decreased as the unit price increased across all conditions. However, the data also showed that: (a) fixed price structures produced slightly more elastic demand than did variable price structures, (b) price descriptions pro… more
Date: December 2000
Creator: Reyes, Jorge R.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Challenges of China's Economic Reform: State Enterprise Reform and Financial Liberalization

Description: This thesis examines China's state-owned enterprise reform and financial reform in the last two decades. I characterize the progress of China's state-owned enterprises reform in two areas: privatization of small SOEs and mass layoffs. I argue that privatization rests on the political economy of China. I also discuss the evolution of the financial system and come up with some strategies of financial liberalization in China. Result from this study suggests that if the necessary reforms of the fin… more
Date: December 2000
Creator: Zhou, Haoming
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Comparative Analysis of Intensive Filial Therapy with Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with Child Witnesses of Domestic Violence

Description: The purpose of this study was to determine the effectiveness of Intensive Filial Therapy in: (a) improving the self-concept of child witnesses of domestic violence; (b) reducing internalizing behavior problems, such as withdrawal, somatic complaints, anxiety and depression, of child witnesses of domestic violence; (c) reducing externalizing behavior problems, such as aggression and delinquency, of child witnesses of domestic violence; (d) reducing overall behavior problems of child witnesses of… more
Date: December 2000
Creator: Smith, Nancy Renfer
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Comparison of 2-Year and 4-Year Telecommunications Technicians' Training Programs Against the Industry Standards

Description: The study focused on the academic programs offered for telecommunications technicians provided by 16 two-year and four-year higher education institutions and the ways in which the programs compared to the established telecommunications technicians' skill standards. Six specific research questions concerned the training programs for telecommunications technicians. The first verified the validity of the information in Peterson's 2000: 2 Year Colleges and Peterson's 2000: 4 Year Colleges identifyi… more
Date: December 2000
Creator: Houdashell-Riegel, Karen Marie
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Comparison of the Leadership Styles Of Occupational Therapy Education Program Directors and Clinic Administrators

Description: Are there differences in leadership styles among occupational therapy clinic administrators and program directors in professional and technical education programs? This study investigated transformational and transactional leadership behaviors and effectiveness as measured by the Multifactor Leadership Questionnaire (MLQ) Form 5x-Short behaviors and demographic characteristics of leaders and their organizations using a questionnaire designed by the researcher. MLQ Leader Forms were received fro… more
Date: December 2000
Creator: Reiss, Rhona G.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Concurrent Validity of the Wide Range Assessment of Memory and Learning and the Woodcock-Johnson Tests of Cognitive Ability-Revised with a Neurologically Compromised Pediatric Population

Description: The Wide Range Assessment of Memory and Learning (WRAML) is a relatively new instrument used in the assessment of memory in children. The purpose of this study was to examine the validity of the WRAML by comparing the performance of children on both the WRAML and the Woodcock-Johnson Tests of Cognitive Ability- Revised (WJTCA-R). Subjects for the study were children in treatment for a brain tumor at a regional children's medical center. Fifty children participated in the study ranging from ages… more
Date: December 2000
Creator: Rochelle, Gary B.
Item Type: Refine your search to only Thesis or Dissertation
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A Confirmatory Factor Analysis of WRAML Scores in a Group of Academically Talented Students

Description: The purpose of this study was to confirm the original factor structure of the Wide Range Assessment of Memory and Learning (WRAML) utilizing a non-clinical adolescent population. Additional analysis examined the relationship between SAT-M scores and spatial relations ability. Exploratory analyses were conducted to determine ethnic and gender differences on the WRAML and subtests from the DAT. Sixty-four academically talented adolescents completed the WRAML and the mechanical reasoning and spat… more
Date: December 2000
Creator: Johnson, Patricia R.
Item Type: Refine your search to only Thesis or Dissertation
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Dark Houses: Navigating Space and Negotiating Silence in the Novels of Faulkner, Warren and Morrison

Description: Poe's "The Fall of the House of Usher," as early as 1839, reveals an uneasiness about the space of the house. Most literary scholars accept that this anxiety exists and causes some tension, since it seems antithetical to another dominant motif, that of the power of place and the home as sanctuary. My critical persona, like Poe's narrator in "The House of Usher," looks into a dark, silent tarn and shudders to see in it not only the reflection of the House of Usher, but perhaps the whole of what … more
Date: December 2000
Creator: Berger, Aimee E.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Differentiation of Central Auditory Processing Disorder and Attention-Deficit Hyperactivity Disorder in Children and Adolescents

Description: The purpose of this study was to determine whether or not children diagnosed with Attention-Deficit Hyperactivity Disorder (ADHD) or Central Auditory Processing Disorder (CAPD) can be distinguished from one another on the basis of both objective and subjective assessment of attention and behavior. First, children and adolescents diagnosed with ADHD, CAPD, and concomitant ADHD/CAPD were compared to participants with emotional problems on measures of attention/concentration, depression, anxiety,… more
Date: December 2000
Creator: Austin, Laura J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Dynamic Grid-Based Data Distribution Management in Large Scale Distributed Simulations

Description: Distributed simulation is an enabling concept to support the networked interaction of models and real world elements that are geographically distributed. This technology has brought a new set of challenging problems to solve, such as Data Distribution Management (DDM). The aim of DDM is to limit and control the volume of the data exchanged during a distributed simulation, and reduce the processing requirements of the simulation hosts by relaying events and state information only to those applic… more
Date: December 2000
Creator: Roy, Amber Joyce
Item Type: Refine your search to only Thesis or Dissertation
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Economic Development, Social Dislocation and Political Turmoil in Sub-Saharan Africa: A Pooled Time-Series Analysis and a Test of Causality

Description: This study focuses on economic development and political turmoil in post-independence Sub-Saharan Africa. There has been a resurgence of interest in the region following the end of the Cold War. In 1997 U.S. president Bill Clinton took a 12-day tour of the region. In 1999 the U.S. Congress (106th Congress) passed the Growth and Opportunity Act and the Hope for Africa Act, designed to encourage political stability and economic development in the region. Although most Sub-Saharan African countrie… more
Date: December 2000
Creator: Obi, Zion Ikechukwu
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effect of Leadership Training on Manufacturing Productivity of Informal Leaders

Description: The purpose of this study was to determine if leadership training, given to informal leaders, had a positive effect on manufacturing productivity. The leadership attributes of informal leaders were assessed using the Leader Attributes Inventory (LAI). Furthermore, the performance of informal leaders was measured using the Leader Effectiveness Index (LEI). Non-management employees from various departments in a manufacturing facility were placed in one of four experimental groups. A Solomon four-… more
Date: December 2000
Creator: Knox, Donald W.
Item Type: Refine your search to only Thesis or Dissertation
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The Effects of a Play Therapy Intervention Conducted by Trained High School Students on the Behavior of Maladjusted Young Children: Implications for School Counselors

Description: This research study investigated the effectiveness of a child-centered play therapy intervention conducted by trained high school students on the behavior of preschool and kindergarten children with adjustment difficulties. Specifically, this research determined if play sessions conducted by high school students trained in child-centered play therapy skills and procedures facilitated change in the children's behaviors. The experimental group children (N=14) each received 20 weekly individual p… more
Date: December 2000
Creator: Rhine, Tammy J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Effects of a Surface Engineered Metallic Coating on Elastomeric Valve Stem Seal Leakage

Description: Valve stem seal leakage is a major source of fugitive emissions, and controlling these emissions can result in added expense in leak detection and repair programs. Elastomeric O-rings can be used as valve stem seals, and O-ring manufacturers recommend lubrication of elastomeric seals to prevent damage and to assure proper sealing. In this research, a metallic coating was applied as a lubricant using a vacuum vapor deposition process to the surface of elastomeric valve stem seals. Valve stem le… more
Date: December 2000
Creator: Taylor, John Abner
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effects of a Therapeutic Play Intervention on Hispanic Students' Reading Achievement, Self-Concept, and Behavior

Description: This study employed a pretest/posttest control group design to investigate the achievement of second grade Hispanic students from a predominantly low socio-economic school in a large metropolitan city. The thirty Hispanic students with the lowest scores on the Gates MacGinitie Reading Test were randomly assigned to the experimental group (n =15) or the control group (n=15). The treatment consisted of 16, 30-minute sessions of play intervention--2 times per week for 8 weeks. The providers of pla… more
Date: December 2000
Creator: Lopez, Helen Trevino
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The Effects of Biofeedback on Task Performance

Description: This experiment attempted to study the effectiveness of biofeedback training on an individual's peak performance while performing a stress-provoking task. In a between subjects design 30 individual college students were divided into 2 groups. One group received auditory biofeedback and relaxation training, and the other group received no training. Both groups met the researcher for 1 hour a week for seven weeks. During each session the participant completed a ten-minute Competition and Coact… more
Date: December 2000
Creator: Bruce, Kurt
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The Effects of Electrochemical Therapy on Colon-25 Tumors in Balb-C Mice

Description: The purpose of the research was to treat immunodeficient mice, implanted with colon-25 tumors, with continuous and interrupted electrochemical therapy (ECT). ECT involves the placement of two electrodes, an anode near the center of the tumor and a cathode into the tumor periphery. A constant voltage is applied across the electrodes for a given period of time. The data showed that the interrupted and continuous ECT resulted in a decrease in mean tumor growth as compared to that of the sham contr… more
Date: December 2000
Creator: Gillen, Aric
Item Type: Refine your search to only Thesis or Dissertation
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The Effects of Free Play As an Instructional Tool on the Quality of Improvisation of First, Second, and Third Grade Children

Description: To look at the effect of free play on the musical improvisations of first, second and third grade children, 108 children were randomly assigned to either a control or treatment group. Subjects were tested using a researcher-designed instrument to elicit an improvisatory response. The control group then received regular music instruction (120 minutes every 2 weeks) and the treatment group received regular music instruction in conjunction with musical free play (100 minutes of instruction and 20 … more
Date: December 2000
Creator: Burger, Tammie L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effects of Media Exposure on Body Satisfaction, Beliefs About Attractiveness, Mood and Bulimic Symptomatology Among College Women

Description: The research of Stice et al. (1994) and Stice and Shaw (1994) proposed several mechanisms that may mediate the adverse effects of media exposure to the thin ideal including internalization of the thin-ideal, negative affect, and body dissatisfaction. The purpose of this study was to extend initial research of Stice and Shaw (1994) by incorporating two forms of media (e.g., TV and Magazines) to assess the effects of exposure to the media portrayal of ideal body shape on women's mood, body satisf… more
Date: December 2000
Creator: Varnado, Jessica Lea
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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