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Needs of familial caregivers of cancer patients across the advanced cancer disease trajectory. (open access)

Needs of familial caregivers of cancer patients across the advanced cancer disease trajectory.

Familial caregivers are providing increasing amounts of care to advanced cancer patients. Increased understanding of caregivers' needs is vital in providing necessary support to lessen caregiver burden and comorbidity. This study examines particular information needs across a variety of specific events in the advanced cancer disease trajectory. A cross-sectional sample of 107 familial caregivers (24 current and 83 bereaved) of people with advanced cancer completed a needs assessment survey along with a measure of health information-seeking behavior. Analyses extend current research by including more specific disease-related events along the advanced cancer trajectory through bereavement. In all information categories, endorsement of wanted information differed across broad stages of Cancer Progression, Treatment, End of Life, and Post-Patient Death. For all information categories, except Dying and Spirituality, greatest information was wanted at the Cancer Progression stage. Information need also differed across specific events within broad stages. The categories of Disease/Medical and Relating to the Patient were the most endorsed at events involving patient care. Spirituality was least endorsed. At patient death, Caregiver Well-being has the highest endorsement. For events thereafter, information on Caregiver Well-being, Spirituality, Future Outlook, and Family and Close Others was most endorsed. Information needs did not differ based on age …
Date: August 2004
Creator: Bernard, Lori Lynn
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Maladaptive appraisals and intrusive thoughts associated with obsessive compulsive disorder: A semiidiographic approach. (open access)

Maladaptive appraisals and intrusive thoughts associated with obsessive compulsive disorder: A semiidiographic approach.

This project investigated the metacognitive strategies used to appraise obsessive thoughts employed by individuals with different anxiety symptoms. Two hundred eighty-seven undergraduate students completed two repertory grids and three anxiety scales. The repertory grids respectively examined the appraisal process of intrusive thoughts both from the perspective of the rater and the rater's imagined average person. Variables quantified from the rep grid related to the construal process of raters' own intrusions, failed to demonstrate robust differences between OCD, non-OCD anxious, and non-anxious individuals. However, it appears that anxious individuals, not just those with OCD, use metacognitive strategies to suppress rigid constructions under perceived social evaluation. Future studies may wish to use related grid variables to explore the relation between obsessions and social anxiety.
Date: August 2004
Creator: Hutchinson, Geoffrey
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Impact of Texas Counselors' Network on students: A preliminary study. (open access)

Impact of Texas Counselors' Network on students: A preliminary study.

This study assessed the impact of the Texas Counselors' Network (TCN) on students of counselors who attended TCN workshops. TCN is a professional organization created in 1996 for the professional development of counselors. TCN impacts primary and secondary school students by providing counselors with selected skills to assist them in helping students. In theory, TCN thus impacts these students by improving overall skills of participating counselors. This study assessed the progress of students before and after implementation of TCN. Students' progress was considered in four areas: Texas Accountability Assessment Scores (TAAS), attendance rates, dropout rates, and high school student enrollment in technical programs. The current study compared student performance in the above four areas during a two to three year period prior to the establishment of TCN, with the initial six years of TCN existence. This study examined data attained through the Texas Educational Agency (TEA) Website using their Academic Excellence Indicator System (AEIS) for four regional TCN groups. The study used a paired t-test to compare the performance of students before versus after counselor participation in network workshops. The findings indicated that overall, counselor participation in TCN could have a significant effect on student performance. In fact, eight tests …
Date: August 2004
Creator: Holmes, Janet
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Internet Use Among African American College Students: Psychosocial Correlates of the Digital Divide (open access)

Internet Use Among African American College Students: Psychosocial Correlates of the Digital Divide

An exploratory study was conducted examining Internet usage among African-American college students. The study examined both psychosocial correlates, including technological anxiety and racial identity as well as socioeconomic measures, as they impacted Internet usage. Additionally, three distinct measures of Internet usage, thin access, thick access and the Internet Connectedness Index (ICI), were used as criterion variables in three separate multiple regression analysis (MRA) models. The results of the study found differences in predictive validity based on the criterion variable used, with the ICI accounting for the greatest amount of variance (54%). Racial identity, in terms of internal beliefs and feelings about being African American and internalization of Afrocentric values in a political context were found to be predictive of Internet usage as measured by the ICI.
Date: August 2004
Creator: Harvey, Pejcharat Jane
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Development and Psychometric Validation of the State-Trait Spirituality Inventory (open access)

Development and Psychometric Validation of the State-Trait Spirituality Inventory

The present study contributes to the widening body of spirituality research by conceptualizing it as a state-trait construct. A new measure of spirituality, the State-Trait Spirituality Inventory (STSI), was created and validated according to psychometric methods of test construction. In its current form, the STSI contains seven state spirituality items and six trait spirituality items. A thorough review of the literature identified common themes in spirituality definitions and assisted in developing definitions of trait and state spirituality. Internal consistency for the trait scale was .88 and for the state scale, .68. Good test-retest reliability was found with coefficients of .84 for trait spirituality and .81 for state spirituality. Results from a preliminary undergraduate sample as well as from the validation sample yielded a two-factor solution. In general, items determined by expert panels as trait items loaded on one factor and items deemed to be state items loaded on the second factor. Multitrait multimethod analysis yielded mixed findings for convergent, divergent, and concurrent validity for the spirituality and religiosity traits. Methods consisted of paper-and-pencil cognitive and behavioral measures. Cognitive measures were more likely to support convergent/divergent validity than were behavioral measures. A major emphasis in the study was to determine whether …
Date: August 2004
Creator: Harvey, Michelle B.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Naturalist (open access)

The Naturalist

The Naturalist is a collection of poems with a critical preface. In this preface, titled "'Death is the mother of beauty': The Contemporary Elegy and the Search for the Dead," I examine contemporary alterations and manifestations of the traditional genre of elegy. I explore the idea that the contemporary mourner is aware of the need to search for meaning despite living in a world without a centrally believed mythology. This search exposes the mourner's need to remain connected to the dead and, by proxy, to grace. I conclude that the contemporary elegy, through metaphorical figuration, personal memory, and traditional symbolism, simultaneously employs and denies the traditional elegiac conventions of apotheosis and resurrection by reconceiving them as methods not of achieving transcendence but of embracing desire with an acceptance of the inability to transcend. The poems of The Naturalist are a collection of elegies that reflect many of the ideas brought forth in the preface.
Date: August 2004
Creator: Harvell, Elizabeth A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Development of a Trauma Play Scale: An Observation-Based Assessment of the Impact of Trauma on the Play Therapy Behaviors of Young Children (open access)

Development of a Trauma Play Scale: An Observation-Based Assessment of the Impact of Trauma on the Play Therapy Behaviors of Young Children

children
Date: August 2004
Creator: Findling, Jennifer Hudson
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Social Support, Depression, and Cardiovascular Disease in Married, Middle-Aged/Older Adults (open access)

Social Support, Depression, and Cardiovascular Disease in Married, Middle-Aged/Older Adults

This study examined the relationship between physical health, social support, and depression in a married, middle-aged/older adult sample in which at least one partner has heart disease. The data was obtained from a national longitudinal study the Health and Retirement Survey (HRS) and is composed of selected respondents and their spouses. The HRS Wave 1 data that was used for these analyses was collected in 1992 and 1993. This study tested a stress buffer model predicting the relationship between physical health, social support, and depression. For study inclusion, participants must have been diagnosed with cardiovascular disease and received treatment in the last year. A heart disease construct was developed by calculating the level of disease by the number of conditions and medical treatments received within the last year. A second health category for other chronic health conditions included diabetes, arthritis, cancer, and chronic pain. These constructs were combined into a total disease construct, which provided a broad measure of health problems typical of an older adult population. Social support was determined by respondents' satisfaction with friends, neighbors, family, their marriage, and enjoyable time spent with their spouse. Social support was subdivided into two constructs separating spousal support from social support …
Date: August 2004
Creator: Hargett Thompson, Candace L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Symphonic Fantasia  Han-Kook Oui Ja-Yeon (Nature in Korea): Score and Critical Commentary (open access)

Symphonic Fantasia Han-Kook Oui Ja-Yeon (Nature in Korea): Score and Critical Commentary

The Symphonic Fantasia Han-Kook oui Ja-Yeon (Nature in Korea ) is a single-movement orchestral piece, which is divided into 5 characteristic sections - each section has programmatic subtitles (Rocks, River, Sea, Wind, and Mountain) and its own idée fixe motive. The degree of texture (homophonic/polyphonic), dynamics (strong/weak), density (thick/thin), velocity (fast/slow), and orchestration (emphasizing various sections of the orchestra) is determined by depiction of the subtitles. The critical commentary of the Symphonic Fantasia Han-Kook oui Ja-Yeon (Nature in Korea ) includes a discussion of form, pitch content (melodic and harmonic), and texture of the piece. The commentary also includes a discussion of the use of programmatic subtitles (Rocks, River, Sea, Wind, and Mountain) and depiction of these concepts in the orchestration of the work. A comparison with other orchestral works is added for explanation and support of the composer's concept. Some of the other composers who are discussed in this paper include Richard Strauss (Alpine Symphony), Gustav Holst (The Planets), Frank Bridge (The Sea), Aaron Copland (Billy the Kid), and Joseph Klein (Pathways: Interior Shadows).
Date: August 2004
Creator: Han, Sang-Eun
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Anatomy of Academic Dishonesty: Cognitive Development, Self-Concept, Neutralization Techniques, and Attitudes Toward Cheating (open access)

The Anatomy of Academic Dishonesty: Cognitive Development, Self-Concept, Neutralization Techniques, and Attitudes Toward Cheating

This study explored the relationship between cheating among university students and their cognitive developmental levels, use of neutralization techniques, self-concept as a multifaceted cognitive construct, and attitude toward cheating. The purposes of this study were to investigate: (1) The relationships between academic dishonesty and each of the following overall independent variables: cognitive development, use of neutralization techniques, self-concept as a multifaceted cognitive construct, and attitude toward cheating, and (2) the reasons behind college student academic cheating behaviors. The study used data from anonymous, self-report surveys administered to undergraduate students in-class and at supplemental sessions. Student participation was voluntary. The study was correlational. The five hypotheses were: (1) Self-concept is significantly and negatively related to academic dishonesty; (2) Cognitive development is significantly and negatively related to academic dishonesty; (3) Attitude toward cheating is significantly and negatively related to academic dishonesty; (4) The use of neutralization techniques is significantly and positively related to academic dishonesty; (5) Cognitive development, self-concept, and attitude toward cheating will make significant contributions to the regression model for the dependent variables of academic dishonesty. The data supported the first, third, and fourth hypotheses. However, the second and fifth hypotheses were supported under certain conditions. The roles of cognitive …
Date: August 2004
Creator: Arvidson, Cody Jean
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Perceptions and attributions of child, spousal, and elder abuse. (open access)

Perceptions and attributions of child, spousal, and elder abuse.

Although researchers have studied perceptions regarding sexually abused children, little was known about how other types of abusive events were perceived. This study examined 480 college students' abuse history and perceptions of child, spousal, and elder abuse by varying the respondent, victim, and perpetrator genders. Physical abuse, psychological abuse, and neglect were investigated. Perceptions of abusiveness, seriousness, harm, and responsibility were examined, along with the extent of identification with the victims/perpetrators. Participants viewed spousal abuse as less serious and harmful than other abuse types, especially when perpetrated against a male or by a female. Although able to recognize psychological abuse, students did not fully understand what other abuse types entailed. Individuals also showed a considerable amount of blame toward victims. Results further demonstrated important findings about how ethnic identity/orientation, religious affiliation, and history of abuse related to perceptions of abusive events.
Date: August 2004
Creator: Altman, Adrianne
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Evaluation of the Economic, Social, and Biological Feasibility of Bioconverting Food Wastes with the Black Soldier Fly (Hermetia illucens) (open access)

Evaluation of the Economic, Social, and Biological Feasibility of Bioconverting Food Wastes with the Black Soldier Fly (Hermetia illucens)

Food waste in the waste stream is becoming an important aspect of integrated waste management systems. Current efforts are composting and animal feeding. However, these food waste disposal practices rely on slow thermodynamic processes of composting or finding farmers with domestic animals capable of consuming the food wastes. Bioconversion, a potential alternative, is a waste management practice that converts food waste to insect larval biomass and organic residue. This project uses a native and common non-pest insect in Texas, the black soldier fly, which processes large quantities of food wastes, as well as animal wastes and sewage in its larval stage. The goal of this research is to facilitate the identification and development of the practical parameters of bioconversion methods at a large cafeteria. Three major factors were selected to evaluate the practicality of a bioconversion system: (1) the biological constraints on the species; (2) the economic costs and benefits for the local community; (3) the perception of and interaction between the public and management agencies with respect to the bioconversion process. Results indicate that bioconversion is feasible on all levels. Larvae tolerate and consume food waste as well as used cooking grease, reducing the overall waste volume by 30-70% …
Date: August 2004
Creator: Barry, Tami
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A National Overview of Intercollegiate Athletics at Public Community Colleges (open access)

A National Overview of Intercollegiate Athletics at Public Community Colleges

This dissertation explores the topic of intercollegiate athletics at public community colleges in the United States. This study is national in scope and includes members of the three major community college athletic associations: the National Junior College Athletic Association (NJCAA), Commission on Athletics (COA), and the Northwest Athletic Association for Community Colleges (NWAACC). Community colleges that were not members of any of these organizations are also included. The sources of data are the Institutional Postsecondary Educational Data System (IPEDS) surveys as well as Equity in Athletic Disclosure Act (EADA) survey data and the Katsinas Community College Classification Scheme. The population for this study was the 567 public community colleges which submitted IPEDS data in 2001 and 2002 and EADA data in 2002. The geographic classification scheme for public community colleges used in this study revealed differences in the role of athletics in rural, suburban, and urban colleges. Rural community colleges place a larger emphasis on intercollegiate athletics. Urban colleges had a lesser emphasis on intercollegiate athletics. Topics that are examined include the extent of college sponsorship of athletics, athletic associations, student participation, sport sponsorship, athletically-related aid, divisions of competition, athletic revenues and expenses, state reimbursement, recruitment expenses, and staffing requirements. …
Date: August 2004
Creator: Castañeda, Cindy
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Survey of Texas Public Universities and University Systems Involvement in State Public Policy Making

Access: Use of this item is restricted to the UNT Community
This study investigated the perceptions of influential relationships between Texas public university presidents, university system chancellors, and state legislators. The study's purpose was to examine Texas public universities engagement in lobbying type behaviors and whether public policy is affected through interaction and communication with legislative leaders. Moreover, of importance for this study was to identifying if Texas public universities actively work to influence the Texas legislature and if lobbying behavior exists whether or not that behavior influences public policy formation within the Texas legislative process. Lastly, this study focused on perceptions dealing with the Texas statute prohibiting state governmental agencies, including public universities and university systems, from influencing legislation through use of state funds. The study was conducted in the winter of 2003 and had 29 president / chancellor respondents and 88 legislator respondents. Three survey instruments were developed by the researcher to determine Texas public university president, system chancellor, and state legislator perceptions and attitudes concerning lobbying type activities, influence, and state statute compliance. Data reported consist of percentages, t-Test of significance, and Cohen's d effect size measure. Results from the study show agreement between the groups in areas of activities utilized to influence the legislative process and actual …
Date: August 2004
Creator: Wolf, David Fletcher
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The utility of the McCarron-Dial System in determining location of brain lesion. (open access)

The utility of the McCarron-Dial System in determining location of brain lesion.

Among the goals of neuropsychological assessment are to detect the presence of brain damage, localize which areas of the brain may be dysfunctional, and describe subsequent functional impairments. The sensitivity of neuropsychological instruments in carrying out these functions has long been a question of debate. The purpose of the present study was to determine the utility of various performance level indictors and lateralizing indicators from the McCarron-Dial System Neuropsychological Assessment Battery (MDS) in ascertaining the presence or absence of brain damage as well as location of lesion. Models used in the present study appear to provide increased classification accuracy compared to other studies utilizing the MDS. The MDS was also shown to be comparable to other well-known neuropsychological batteries, including the Halstead-Reitan Neuropsychological Test Battery (HRB) and the Luria-Nebraska Neuropsychological Battery (LNNB) with regard to distinguishing between those with brain damage and normal controls, and also localizing brain lesion. The results of this study offer clinicians parsimonious models to evaluate for presence of lesion and its location so this information may be used to make accurate, thorough diagnoses and appropriate treatment and rehabilitation recommendations.
Date: August 2004
Creator: Taylor, Erin Kathleen
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Reasons for attrition from a smoking cessation program. (open access)

Reasons for attrition from a smoking cessation program.

The present study examined various psychosocial variables that may influence success in a stop smoking program (QuitSmart) used by the North Texas Veterans Health Care Service (NTVHCS). The QuitSmart program utilizes the Stages of Change Model, with its focus on the last three stages (preparation, action, and maintenance). It was proposed that factors including shame-proneness, guilt, anger/hostility, depression, self-efficacy - both global and smoking situational, neuroticism, and level of nicotine dependence might individually or in combination predict attrition from the NTVHCS smoking cessation program. Results indicate that shame-proneness, guilt, anger/hostility, and depression did not individually predict attrition. Persons with high levels of smoking situational self-efficacy tend to utilize self-change strategies leading to greater success in smoking cessation. Participants with a psychological diagnosis, when combined with neuroticism and shame-proneness, appear to have more difficulty with cessation than those with only a medical diagnosis. Clinical implications and suggestions for change to the NTVHCS smoking cessation program are discussed.
Date: August 2004
Creator: Taber, Iris
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Typology of Ethics Education in Healthcare (open access)

A Typology of Ethics Education in Healthcare

This study is a qualitative analysis of the author's previous publications, academic and operational practitioners input, the literature, and accreditation requirements for ethics education in healthcare. Two research questions were addressed: 1. Is a typology of ethics education in healthcare needed, and 2. Is more specificity of ethics education in healthcare required? Both research questions were answered in the affirmative. The results indicated that a typology of ethics education in healthcare is needed with the primary reason being the need for a focused manuscript that uses content validity to illustrate the hierarchy of ethical reasoning in healthcare. No one manuscript brings together the six ethics education domains that were identified as required for appropriate ethics education in healthcare. The second research question result indicated that there are sparse educational objectives available in the context of cognitive and affective educational domains, especially for the six ethics domains presented here: 1. Decision ethics, 2. Professional ethics, 3. Clinical ethics, 4. Business ethics, 5. Organizational ethics, and 6. Social ethics. Due to the limited specificity of the ethics education objectives identified in the literature, the author developed and presented a typology, beginning with 270 ethics educational objectives, for use in healthcare instruction. A …
Date: August 2004
Creator: Porter, Russell Dean
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Investigation of Structure and Properties of Low Temperature Deposited Diamond-Like Carbon Films (open access)

Investigation of Structure and Properties of Low Temperature Deposited Diamond-Like Carbon Films

Electrodeposition is a novel method for fabrication of diamond-like carbon (DLC) films on metal substrates. In this work, DLC was electrochemically deposited on different substrates based on an anodic oxidation cyclization of acetylene in liquid ammonia. Successfully anodic deposition was carried out for DLC onto nickel substrate at temperatures below -40°C. Comparative studies were performed on a series of different carbon sources (acetylene, sodium acetylide, and a mixture of acetylene and sodium acetylide). The films were characterized using a variety of methods including Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), XPS valence band spectra, and/or scanning electron microscopy (SEM). Raman spectroscopy is used as a bench mark technique to verify the presence of deposited DLC films, to access the films homogeneities, and to provide the ratio of the different carbon phases, mainly disordered graphite (D) and graphite (G) phases in the films. A combination of the Raman with FTIR and valence band spectra analysis allowed the distinction between hydrogenated DLC and unhydrogenated DLC films. Three different kinds of DLC [(1) hydrogenated DLC (a-C:H); (2) tetrahedral hydrogenated DLC (ta-C:H); and (3) graphitic-like DLC] were deposited depending upon the deposition conditions and substrates. Temperature and current density are …
Date: August 2004
Creator: Pingsuthiwong, Charoendee
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Adapting Filial Therapy for Families who have a Child with a Life-Threatening Illness (open access)

Adapting Filial Therapy for Families who have a Child with a Life-Threatening Illness

Utilizing a collective case study design, I examined and described the filial therapy (FT) process and adaptations discovered to be necessary and unnecessary in working with families who have a child with a life-threatening illness in the hospital setting. Data from a total of 7 parents was utilized, including those who terminated early, in order to gain a greater understanding of adapting FT for families who have a child with a life-threatening illness and their participation patterns. The parents attended 10 one- to two-hour FT sessions. The data was analyzed to examine for themes, patterns and relationships intrinsically with each case participant, as well as across cases. Analysis indicated that parents with a child with a life-threatening illness had great difficulty committing to attend FT; and a high rate of attrition occurred for those who did commit. A theme regarding flexibility was found to be of eminent importance in a variety of manifestations including therapeutic methods, session format, location and time of sessions, and intense vs traditional FT. Therapeutic adaptations in flexibility found to be important including openness to cathartic and personal parenting sessions, tolerance of forgetfulness, and lowering typical therapeutic concerns of dependency in the relationship. An inability for …
Date: August 2004
Creator: Steen, Rheta LeAnne
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The WASI™ as a Screening Tool for Counselors in the Referral Decision for a Neuropsychological Evaluation (open access)

The WASI™ as a Screening Tool for Counselors in the Referral Decision for a Neuropsychological Evaluation

When a client has cognitive impairment resulting from cerebral dysfunction (CD) that goes undiagnosed and, therefore, untreated, psychotherapy and rehabilitation outcome is likely to be impacted negatively. Due primarily to managed care, screening for CD has reduced substantially. Master's level counselors need a cost-efficient way to detect possible CD and, thus, justify referral for neuropsychological evaluation. This study examined the Wechsler Abbreviated Scale of Intelligence™ (WASI™) instrument's ability to screen for possible CD by examining the relationship between a) WASI Performance IQ (PIQ) and Verbal IQ (VIQ) scores and neuropsychological test scores, and b) the VIQ-PIQ discrepancy and the severity of disability. In this retrospective study, test scores were extrapolated from neuropsychological assessments conducted between 2001 and 2004 on 73 CD-diagnosed adults at a CARF accredited rehabilitation facility. Disability severity ratings of mild, moderate, and severe were assigned based on clinical judgment and interrater agreement. The assessment battery included the WASI and several neuropsychological tests: Halstead-Reitan TPT, TMT-A and B, and FOT; WMS-III VR-I and 2, LM-1 and 2, and MC; McCarron-Dial HVDT; SDMT; and SCT. Based upon a multitrait-multimethod matrix, mild to moderate convergent and discriminant validity was found with the WASI VIQ and PIQ traits among neuropsychological verbal …
Date: August 2004
Creator: Snowden, Marie Dillon
Object Type: Thesis or Dissertation
System: The UNT Digital Library
N-Acylethanolamine Metabolism During Seed Germination: Molecular Identification of a Functional N-Acylethanolamine Amidohydrolase (open access)

N-Acylethanolamine Metabolism During Seed Germination: Molecular Identification of a Functional N-Acylethanolamine Amidohydrolase

N-Acylethanolamines (NAEs) are endogenous lipid metabolites that occur in a variety of dry seeds, and their levels decline rapidly during the first few hours of imbibition (Chapman et al., 1999, Plant Physiol., 120:1157-1164). Biochemical studies supported the existence of an NAE amidohydrolase activity in seeds and seedlings, and efforts were directed toward identification of DNA sequences encoding this enzyme. Mammalian tissues metabolize NAEs via an amidase enzyme designated fatty acid amide hydrolase (FAAH). Based on the characteristic amidase signature sequence in mammalian FAAH, a candidate Arabidopsis cDNA was identified and isolated by reverse transcriptase-PCR. The Arabidopsis cDNA was expressed in E. coli and the recombinant protein indeed hydrolyzed a range of NAEs to free fatty acids and ethanolamine. Kinetic parameters for the recombinant protein were consistent with those properties of the rat FAAH, supporting identification of this Arabidopsis cDNA as a FAAH homologue. Two T-DNA insertional mutant lines with disruptions in the Arabidopsis NAE amidohydrolase gene (At5g64440) were identified. The homozygous mutant seedlings were more sensitive than the wild type to exogenously applied NAE 12:0. Transgenic seedlings overexpressing the NAE amidohydrolase enzyme showed noticeably greater tolerance to NAE 12:0 than wild type seedlings. These results together provide evidence in vitro …
Date: August 2004
Creator: Shrestha, Rhidaya
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Effects of Whisker-Trimming on GABAA Receptors in S1 Cortex (open access)

Effects of Whisker-Trimming on GABAA Receptors in S1 Cortex

A number of studies have shown that sensory deprivation is associated with selective decreases in GABA, GAD, and GABA receptors, in deprived areas of visual and somatosensory cortex. Those studies focused on layer 4, a recipient of direct thalamocortical sensory input. However, supragranular layers 2/3 have been recently identified as a major locus of functional plasticity in sensory deprivation and long-term potentiation. To examine whether GABAA receptors in layers 2/3 are affected by sensory deprivation, rats had mystacial vibrissae in middle row C or rows ABDE trimmed for 6 weeks beginning in early adulthood. Layers 2/3 above the deprived and adjacent whisker barrels were located in tangential sections, using patterns of radial blood vessels as fiducial marks. In deprived whisker barrel columns, [3H]muscimol binding to GABAA receptors decreased by 12.8% ± 1.2 (P &lt; 0.001) in layers 2/3 and 11.4% ± 1.2 (P<0.001) in layer 4. Altered levels of GABAA α1 subunit (Fritschy et al., 1994) were indicated by reduced optical density of immunostaining, both in deprived layers 2/3 (6.4% ± 0.7; P&lt; 0.001) and in layer 4 (3.4% ± 1.0; P &lt; 0.005). Interestingly, Nissl staining density also decreased in deprived layers 2/3 (12.7% ± 1.8 P &lt; 0.001) …
Date: August 2004
Creator: Salazar, Eduardo
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Predicting student performance on the Texas Assessment of Academic Skills Exit Level Exam: Predictor modeling through logistic regression. (open access)

Predicting student performance on the Texas Assessment of Academic Skills Exit Level Exam: Predictor modeling through logistic regression.

The purpose of this study was to investigate predicting student success on one example of a "high stakes" test, the Texas Assessment of Academic Skills Exit Level Exam. Prediction algorithms for the mathematics, reading, and writing portions of the test were formulated using SPSS® statistical software. Student data available on all 440 students were input to logistic regression to build the algorithms. Approximately 80% of the students' results were predicted correctly by each algorithm. The data that were most predictive were the course related to the subject area of the test the student was taking, and the semester exam grade and semester average in the course related to the test. The standards of success or passing were making a 70% or higher on the mathematics, 88% or higher on the reading, and 76% or higher on the writing portion of the exam. The higher passing standards maintained a pass/fail dichotomy and simulate the standard on the new Texas Assessment of Knowledge and Skills Exit Level Exam. The use of the algorithms can assist school staff in identifying individual students, not just groups of students, who could benefit from some type of academic intervention.
Date: August 2004
Creator: Rambo, James R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Gender Differences in Child, Parent, and Teacher Perception of Social Functioning Among Children With ADHD (open access)

Gender Differences in Child, Parent, and Teacher Perception of Social Functioning Among Children With ADHD

Children with Attention Deficit Hyperactivity Disorder (ADHD) tend to experience social functioning problems, with girls more likely to encounter peer rejection than boys. The present study investigated gender differences in child, parent, and teacher perceptions of social functioning among ADHD and control children. Participants included 119 children (ages 6-11) and their parents. Sixty-one children were previously diagnosed with ADHD. Parents, teachers, and children completed measures assessing the child's social functioning. The results indicate that the relationship between ADHD status and social functioning differs as a function of rater. Teachers and parents reported that ADHD children had lower social functioning than controls, while ADHD and control children reported similar levels of social functioning. Gender differences were found on the child self-report, with girls reporting lower social functioning than boys. In ADHD children the relationship between social functioning and comorbid depression differed as a function of rater. Specifically, among ADHD children with depression, parents rated children as having lower social functioning than did children or teachers. In ADHD children without comorbid depression, however, there were no rater differences. Additionally, no rater differences in social functioning were found between ADHD children with and without a comorbid psychiatric condition. Overall, the results of the …
Date: August 2004
Creator: Tureau, Corinne C. S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library