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Infinite Hallways: “Parabola Heretica” and Other Journeys

Description: This creative thesis collects five fictional stories, as well as a critical preface entitled “Fractals and the Gestalt: the Hybridization of Genre.” The critical preface discusses genre as a literary element and explores techniques for effective genre hybridization. The stories range from psychological fiction to science fiction and fantasy fiction. Each story also employs elements from other genres as well. These stories collectively explore the concept of the other and themes of connection and ostracization.
Date: December 2013
Creator: Garay, Christopher

The Effects of Brief Exposure to Non Traditional Media Messages on Female Body Image

Description: Body image may be defined as the perception or attitude one has regarding the appearance of his or her body. Body image concerns are not only central to the diagnostic criteria of eating disorders, but also create distress for nonclinical populations. Females (n = 167) from three universities participated in a study by completing the Eating Disorder Inventory - 2 (Garner, 1991) and the Figure Rating Scale (Stunkard, Sorenson, & Schulsinger, 1983); watching a video; and then completing the instruments again. Subjects in the treatment group (n = 89) viewed a video designed to increase awareness of unrealistic body sizes and shapes seen in the media (Kilbourne, 1995). Subjects in the comparison group (n = 77) viewed a video unrelated to female body image.
Date: August 1999
Creator: Garber, Carla F.

Identification of a Potential Factor Affecting Graduation Rates in STEM for Hispanic Students at the University of North Texas, via Analysis of Nonfiction Science Books in Spanish Language for ELLs in the Dallas ISD Schools

Description: Latinos are the largest minority group in the U.S.; however despite the continuous growth of the Hispanic population, Latinos are severely underrepresented in STEM fields. One of the reasons that might explain why Latinos do not major in STEM is the way they encounter science curriculum in primary school. Students' limited proficiency in English may constrain their science achievement when instruction is delivered exclusively in English. A quantitative analysis with graduation rates in STEM from 2009 to 2014 at the University of North Texas was conducted, finding that there is a significant difference (p<0.05) in the number of bachelor's degrees in STEM between Hispanic, White, African American and other student populations. Interviews with teachers, librarians and publishing companies were performed to describe the limited science literature in Spanish at the Dallas ISD schools. Improving science literacy by teaching according to ELLs' linguistic skills and culture may lead to a better understanding of science curriculum throughout their education, which may translate into higher college graduation rates by Hispanic recipients in STEM.
Date: August 2016
Creator: Garcia Colin, Monica

Glucose Induces Sensitivity to Oxygen Deprivation and Alters Gene Expression in Caenorhabditis Elegans

Description: An organisms’ diet represents an exogenous influence that often yields colossal effects on long-term health and disease risk. The overconsumption of dietary sugars for example, has contributed to significant increases in obesity and type-2 diabetes; health issues that are costly both economically and in terms of human life. Individuals who are obese or are type-2 diabetic often have compromised oxygen delivery and an increased vulnerability to oxygen-deprivation related complications, such as ischemic strokes, peripheral arterial disease and myocardial infarction. Thus, it is of interest to identify the molecular changes glucose supplementation or hyperglycemia can induce, which ultimately compromise oxygen deprivation responses. By utilizing the Caenorhabditis elegans genetic model system, which is anoxia tolerant, I determined that a glucose-supplemented diet negatively impacts responses to anoxia and that the insulin-like signaling pathway, through fatty acid and ceramide biosynthesis and antioxidant activity, modulates anoxia survival. Additionally, a glucose-supplemented diet induces lipid accumulation. Use of RNA-sequencing analysis to compare gene expression responses in animals fed either a standard or glucose-supplemented diet revealed that glucose impacts the expression of genes involved with multiple cellular processes including lipid and carbohydrate metabolism, stress responses, cell division, and extracellular functions. Several of the genes we identified are homologous to human genes that are differentially regulated in response to metabolic diseases, suggesting that there may be conserved gene expression responses between C. elegans supplemented with glucose and a diabetic and/or obese state observed in humans. These findings support the utility of C. elegans to model specific aspects of the T2D disease process (e.g., glucose-induced sensitivity to oxygen deprivation) and identify potentially novel regulators of common complications seen in hyperglycemic and T2D patients (e.g., macrovascular complications).
Date: August 2015
Creator: Garcia, Anastacia M.

Design and Manufacture of Molding Compounds for High Reliability Microelectronics in Extreme Conditions

Description: The widespread use of electronics in more avenues of consumer use is increasing. Applications range from medical instrumentation that directly can affect someone's life, down hole sensors for oil and gas, aerospace, aeronautics, and automotive electronics. The increased power density and harsh environment makes the reliability of the packaging a vital part of the reliability of the device. The increased importance of analog devices in these applications, their high voltage and high temperature resilience is resulting in challenges that have not been dealt with before. In particular packaging where insulative properties are vital use polymer resins modified by ceramic fillers. The distinct dielectric properties of the resin and the filler result in charge storage and release of the polarization currents in the composite that have had unpredictable consequences on reliability. The objective of this effort is therefore to investigate a technique that can be used to measure the polarization in filled polymer resins and evaluate reliable molding compounds. A valuable approach to measure polarization in polymers where charge release is tied to the glass transition in the polymer is referred to as thermally stimulated depolarization current (TSDC) technique. In this dissertation a new TSDC measurement system was designed and fabricated. The instrument is an assembly of several components that are automated via a LabVIEW program that gives the user flexibility to test different dielectric compounds at high temperatures and high voltage. The temperature control is enabled through the use of dry air convection heating at a very slow rate enabling controlled heating and cooling. Charge trapping and de-trapping processes were investigated in order to obtain information on insulating polymeric composites and how to optimize it. A number of material properties were investigated. First, polarization due to charges on the filer were investigated using composites containing charged and uncharged particles using ...
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Date: December 2016
Creator: Garcia, Andres

The Legislative Origins of the Marshall Plan

Description: With a deep conviction that this study will be useful to those who would better understand contemporary foreign policy, "The Legislative Origins of the Marshall Plan" is written with the following purposes: (1) to discover the origin and motives of the Marshall plan, (2) to discover the effect of the world-wide tours made by Congressmen in 1947 upon the legislative processes in the Marshall plan, (3) to compare and evaluate the respective contributions of the two houses of Congress to the Marshall plan, (4) to ascertain whether the Marshall plan is an economic, political, or humanitarian instrument, and (5) to evaluate the domestic effects, both governmental and economic, and to project them into the future.
Date: August 1949
Creator: Garcia, Antonio

Exploring Student Learning on a Short-term, Faculty-led Study Abroad Course Through a Student Development Lens

Description: Embarking on a study abroad experience is thought to be a transformational experience for students, and previous researchers have tended to find that the potential benefits of study abroad experiences, including greater conceptual and behavioral intercultural competence, are greater with longer periods abroad. The purpose of this study was to create an intentional learning experience for students who embarked on a short-term study abroad in rural areas of China and to apply faculty intervention of a student development approach to student learning to create a high-impact learning environment for students centered on a service-learning project. This qualitative study gathered primary data from students and instructors during the course through a collection of observation and field notes, student journals, pre- and post-construct tests, and final presentation. Follow-up interviews were conducted 10 months after course completion. Six students participated in this course and study who were from a variety of disciplines and classifications. Five students were female; one was male. Four students were undergraduates; two were graduate students. Student ethnicities included three Caucasians and African American, along with two international students from Mexico and Iran. Key outcomes of this study were that when short-term study abroad faculty members applied creative interventions, students were transformed with regard to their beliefs, perspectives, and behaviors and that when they guided students through a process of reflection and analysis, students exhibited exponential personal development. In addition, the ability to challenge or support students in reaching higher levels of personal development is a privilege that faculty must earn over time and through an authentic demonstration of care for students’ wellbeing. Short-term study abroad faculty members can use the results of this study to maximize the developmental impact of such programs on student participants.
Date: December 2015
Creator: Garcia, Hope F.

The Role of Learning in Emergency Physicians' Process of Changing Practice Behavior

Description: The sequence of events leading to the implementation of a change in emergency physicians' practice and the learning activities and processes undertaken are examined and described in this study. A qualitative case study design was utilized and semi-structured interviews were employed as the primary means of data collection. Thirty emergency physicians were interviewed in face-to-face or telephone interviews. One change that required learning was selected per physician for an in-depth interview. The following factors were examined: motivation to change a practice behavior, time to implementation of changes, source of awareness, barriers to change, use of learning resources, stages in the change process, and method of learning.
Date: May 1994
Creator: Garcia, Rebecca, 1953-

Acculturation and Sociocultural Influences as Predictors of Family Relationships and Body Image Dissatisfaction in African American, Hispanic American, and European American Women

Description: Ethnic differences in etiological factors linked to body image dissatisfaction and eating disorders were examined. In addition, the interaction of acculturation and body image dissatisfaction in influencing minority women's relationships with their parents was investigated. Participants consisted of 302 undergraduates from three ethnic groups: Caucasian, Hispanic American, and African American women who were administered self-report measures. Differences were not found between the groups in body image dissatisfaction. Low self-esteem, internalization of the thin ideal, and family emphasis on weight and appearance were all related to more body image dissatisfaction for each of these groups; however, differences in degree of endorsement were also noted between the ethnic groups on these factors. Based on the interaction findings (body image x acculturation) separation from one's mother was found in the area of attitudes and emotions for the Hispanic sample but not for the African American sample on any of the parent scales. Areas for future research and implications for diagnosis and treatment of minority populations are also discussed.
Date: December 2006
Creator: Garcia-Rea, Elizabeth Ann

Analysis of School Discipline with a Focus on Characteristics of Hispanic Adolescents with Learning Disabilities from a Low-Socioeconomic Area

Description: The research reported herein examined the emotional and behavioral characteristics of adolescent Hispanic students with and without learning disabilities from a middle school in north central Texas. The data were based on all students enrolled at the campus (N = 986), but focused on 55 students of Hispanic descent with learning disabilities and 55 students without. The data accrued for this study utilized a school discipline database. In addition, a 43-item behavioral rating scale was completed on each student of the more focused group. Methods of data analysis were derived from descriptive statistics, one-way analysis of variance, and multiple regression measurements. The results indicate that Hispanic students with learning disabilities often exhibit more disruptive behaviors.
Date: December 2009
Creator: Garcia-Rodriguez, Gina D.

Simulation of physical and chemical processes in reservoirs: Two case studies.

Description: Managing water quality aspects requires the use of integrative tools that allow a holistic approach to this problem. Water quality models coupled to hydrodynamic models are these tools. This study presents the application of the water quality model WASP coupled to the hydrodynamic model DYNHYD for two distinct reservoirs: Lake Texoma and Tocoma Reservoir. Modeling the former included simulations of water velocities, water level, and four chemical and physical compounds: chlorides, dissolved oxygen (DO), biochemical oxygen demand (BOD), and total suspended solids (TSS); and validation of the results by comparing with observed values during March - May, 1997. The latter is still under project status and the simulation was performed in a prospective way. The analysis included simulations of water velocities under current and for expected conditions, DO and BOD. Both models, DYNHYD and WASP, fitted pretty well to observed conditions for Lake Texoma and for where Tocoma Reservoir has been planned. Considering management and decision support purposes, the role of boundary and loading conditions also was tested. For Lake Texoma, controlling boundary conditions for chlorides is a determinant factor for water quality of the system. However, DO and TSS in the reservoir are governed by additional process besides the condition of the boundary. Estimated loadings for this system did not provided significant effects, even though the allocation of a load for chlorides resulted in significant changes in the trend for expected chloride concentrations at the Washita River Arm of Lake Texoma. For Tocoma Reservoir, the expected concentration of DO all over the reservoir is going to driven by boundary conditions, as well as by the management of autochthonous BOD loadings provided by vegetation decomposition. These two factors will be determinant for the resulting water quality of the future reservoir.
Date: December 2005
Creator: García Iturbe, Selma L.

Field and Laboratory Fish Tissue Accumulation of Carbamazepine and Amiodarone

Description: The goals of this dissertation work were to assess the bioaccumulation potential of carbamazepine and amiodarone, two widely used ionizable pharmaceutical compounds that possess mid-range and high LogD values, respectively, and to evaluate alternative methods to assess chemical accumulation in bluntnose minnows, catfish, and tilapia. Results indicated that carbamazepine does not appreciably bioaccumulate in fish tissue with BCFk and BAF carbamazepine values < 10. Amiodarone, however, with a log D of 5.87 at pH 7.4, accumulated in fish tissues with kinetic BCF values <2,400. Collectively, the data suggest that full and abbreviated laboratory-derived BCFs, BCFMs derived from S9 loss-of-parent assays, as well as field BAF values are similar for each of the two drugs. In summary, the results from this dissertation indicated: 1) The reduced design BCF test is a good estimate for the traditional OECD 305 test. 2) In vitro S9 metabolism assays provide comparable BCF estimates to the OECD 305 test. 3) Metabolism may play a large role in the accumulation of drugs in fish. 4) Reduced BCF tests and in vitro assays are cost effective and can reduce vertebrate testing.
Date: December 2013
Creator: García Martínez, Santos Noé

Racial/ethnic Differences in Hospital Utilization for Cardiovascular-related Events: Evidence of a Survival and Recovery Advantage for Latinos?

Description: Evidence continues to demonstrate that racial/ethnic minority groups experience a disproportionate burden of disease and mortality in cardiovascular-related diseases (CVDs). However, emerging evidence suggests a health advantage for Latinos despite a high risk profile. The current study explored the hospital utilization trends of Latino and non-Latino patients and examined the possibility of an advantage for Latinos within the context of CVD-related events with retrospective data collected over a 12-month period from a local safety-net hospital. Contrary to my hypotheses, there was no advantage for in-hospital mortality, length of stay or re-admission in Latinos compared to non-Latinos; rather, Latinos hospitalized for a CVD-related event had a significantly longer length of stay and had greater odds for re-admission when compared to non-Latinos. Despite data suggesting a general health advantage, Latinos may experience a relative disparity within the context of hospital utilization for CVD-related events. Findings have implications for understanding the hospital utilization trends of Latinos following a CVD-related event and suggest a call for action to advance understanding of Latino cardiovascular health.
Date: May 2014
Creator: García, James J.

The impact of the Home Instruction for Parents of Preschool Youngsters (HIPPY) program on reading, mathematics, and language achievement of Hispanic English language learners.

Description: This study sought to answer if the Home Instruction for Parents of Preschool Youngsters (HIPPY) program had a positive academic impact on Hispanic English language learners (ELL). HIPPY is a free, 2-year, home-based early intervention program for 4-and 5-year-old children. The program is intended to provide educational enrichment to at-risk children from poor and immigrant families, increase school readiness, and foster parent involvement in their children's education. A quasi-experimental design and quantitative measures were used to measure the academic success of Hispanic ELL students in reading, mathematics, and language arts. The sample included an experimental group and a purposeful control group. Hispanic students who attended an early childhood school as 4 year olds and participated in the HIPPY 4 and 5 programs were compared to Hispanic students who attended an early childhood school as 4 year olds and did not participate in HIPPY. Results from the Texas-mandated criterion referenced Texas Assessment Knowledge and Skills (TAKS™) Test and the TerraNova® and TerraNova SUPERA® norm referenced tests were used in this study. Results from the TAKS Reading and TAKS Mathematics Grade 3 and the TerraNova reading, language, mathematics, and total composite scores were analyzed using a one-way analysis of variance. The treatment group and control group results from both assessments were measured and compared. A statistically significant difference was found in 5 out of the 6 null hypotheses tested. The treatment group statistically significantly outperformed the control group in the TAKS Reading and the TerraNova and TerraNova SUPERA reading, language, mathematics, and total composite assessments. This study substantiates that the HIPPY program works and can have a positive impact on a child's school readiness. Additionally, a significant range of sustainability was also established since the results were measured from assessments administered in the third grade and 5 years after the treatment group ...
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Date: May 2006
Creator: García, Maria G.

Substituent Effects on Diazeniumdiolate Anions: an AB Initio and DFT Study

Description: Nitroglycerin and isoamyl nitrate have been used as nitrovasodilators since the nineteeth century. However, not until recently has it been known that these compounds were useful since they promoted the release of NO in the body. More recently, a new class of drugs, NO donors, has been developed. These include S-nitrosothiols (RSNO), sydnonimines, and nucleophilic NO adducts.
Date: December 1997
Creator: García, Samuel A. (Samuel Anthony)

Perseveration Errors in the Performance of Dichotic Listening Tasks by Schizophrenics: The Role of Stimulus Fusion

Description: The purpose of the present study was to compare the number of perseverations on fused (no delay) versus unfused (0.5 msec delay) CV-DL tasks with measures on a battery of executive functions across three groups: Schizophrenics (SCZ), Manic-Depressives (MD), and normal controls (NC).
Date: December 1995
Creator: Gard, Diane M.

Creating a Verbal Community for Describing Emotional Responses within a Contingency Lens: The Effects of a Brief Training Workshop

Description: Observing emotional responses is recognized as a valuable clinical skill in a variety of professions, including applied behavior analysis. Emotional responses can flag possible contingencies thereby guiding a behavior analyst to better select valid measures, goals, and procedures. Additionally, emotional responses can be goals in and of themselves. The purpose of the present study was to evaluate the effects of a workshop on the observation and description of emotional responses by behavior analysts-in-training. The procedures included instructions, modeling, practice, discussion and feedback. The workshop included a blend of trainer presentation and interteaching strategies. The effects of the workshop were evaluated using a single-subject A-B design with multiple probe measures across four students. During probe assessments participants watched short video clips of family interactions and wrote a descriptive narrative in response to several questions. This created a permanent record for quantitative evaluation and analysis. The study resulted in an increase in the number of descriptions of emotional responses among all participants. The participants also increased responses tying the emotional response to external environmental events more often in the post-workshop assessment than the pre-workshop assessment. Results are discussed within the context of training applied behavior analysts, the analysis of verbal behavior, and the role of emotions in clinical practice.
Date: December 2016
Creator: Garden, Regan E.

The Preliminary Development of a Sentence Completion Inventory to Assess Psychologically Unhealthy Religious Beliefs

Description: To assess psychologically unhealthy Protestant beliefs a Religious Sentence Completion Inventory (RSCI), and scoring Manual, were developed from a pilot study. In the main study 103 undergraduate students were subjects. Interscorer reliability for the RSCI was .83. Results revealed significant positive correlations between the RSCI, and maladjustment validity criteria: a Minnesota Multiphasic Personality Inventory (MMPI) total weighted score; and MPI clinical scales 1, 2, 3, 4, 6, 7, and 8; but not validity scale F; for females. Only MMPI scale 6 correlated with the RSCI for males. These data appear to partially support the proposition that whether Protestant beliefs hinder or do not hinder mental health depends upon the particular kind of beliefs a Protestant holds.
Date: May 1975
Creator: Gardiner, Joseph R. (Joseph Rowe)

Motivating Pre-service Teachers to Incorporate Technology Into the Classroom

Description: Technology integration into the classroom is a multi-faceted and complex topic. One factor that can have an effect on a teacher's incorporation of technology into their classroom is pre-service teacher technology training. In this research study the ARCS instructional design model was applied to a pre-service teacher technology course in the hopes of motivating course attendees to both learn about technology incorporation and to incorporate technology into their future classrooms. The ARCS instructional design model that relies on the motivational sub-components of attention, relevance, confidences, and satisfaction to develop instruction that motivates to students to learn course content and goals. This study analyzed a group of pre-service teachers enrolled in a university technology training course to determine if the redesign resulted in the desired outcomes. Pre-test and post-test data was collected using both quantitative and qualitative instruments to analyze the potential effect of the redesigned course.
Date: August 2013
Creator: Gardner, David