UNT Theses and Dissertations - 210 Matching Results

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Proteomic Responses in the Gill of Zebrafish Following Exposure to Ibuprofen and Naproxen

Description: Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most abundant environmental pharmaceutical contaminants. In this study, a proteomic analysis was conducted to identify proteins differentially expressed in gill tissue of zebrafish (Danio rerio) after a 14-day exposure to the NSAIDs ibuprofen or naproxen. A total of 104 proteins with altered expression as indicated by 2-dimensional electrophoresis were analyzed by liquid chromatography with ion trap mass spectrometry (MS/MS). A total of 14 proteins fulfilled our requirements for identification which included consistency among replicate gels as well as successful MS/MS ion searches with the MASCOT database. The most prominent feature of the differential protein expression observed after NSAID exposure was an up-regulation of proteins belonging to the globin family which are involved in the transport of oxygen from gills and availability of heme molecules required for synthesis of cyclooxygenase. Differential expression was observed at exposure concentrations as low as 1-10 µg/L indicating that altered gene expression may occur in fish subjected to environmentally realistic levels of NSAID exposure.
Date: August 2012
Creator: Adhikari, Prem R.
Partner: UNT Libraries

General Satisfaction of Students in 100% Online Courses in the Department of Learning Technologies at the University of North Texas

Description: The purpose of this study was to examine whether there are significant relationships between the general satisfaction of students and learner-content interaction, learner-instructor interaction, learner-learner interaction, and learner-technology interaction in 100% online courses. There were 310 responses from the students. This study did not use data from duplicate students and instructors. Excel was used to find duplicate students and instructors; therefore, 128 responses were deleted. After examination of box plots, an additional four cases were removed because they were outliers on seven or more variables. Nineteen responses were deleted because they did not answer all questions of interest, resulting in a total sample of 159 students. Multiple regression analysis was used to examine the relationship between the four independent variables and the dependent variable. In addition to tests for statistical significance, practical significance was evaluated with the multiple R2 , which reported the common variance between independent variables and dependent variable. The two variables of learner-content and learner-instructor interaction play a significant role in predicting online satisfaction. Minimally, the variable learner-technology can predict online satisfaction and is an important construct that must be considered when offering online courses. Results of this study provide help in establishing a valid and reliable survey instrument and in developing an online best learning environment, as well as recommendations for institutions offering online learning or considering the development of online learning courses.
Date: May 2012
Creator: Ahn, Byungmun
Partner: UNT Libraries

Real Analyticity of Hausdorff Dimension of Disconnected Julia Sets of Cubic Parabolic Polynomials

Description: Consider a family of cubic parabolic polynomials given by for non-zero complex parameters such that for each the polynomial is a parabolic polynomial, that is, the polynomial has a parabolic fixed point and the Julia set of , denoted by , does not contain any critical points of . We also assumed that for each , one finite critical point of the polynomial escapes to the super-attracting fixed point infinity. So, the Julia sets are disconnected. The concern about the family is that the members of this family are generally not even bi-Lipschitz conjugate on their Julia sets. We have proved that the parameter set is open and contains a deleted neighborhood of the origin 0. Our main result is that the Hausdorff dimension function defined by is real analytic. To prove this we have constructed a holomorphic family of holomorphic parabolic graph directed Markov systems whose limit sets coincide with the Julia sets of polynomials up to a countable set, and hence have the same Hausdorff dimension. Then we associate to this holomorphic family of holomorphic parabolic graph directed Markov systems an analytic family, call it , of conformal graph directed Markov systems with infinite number of edges in order to reduce the problem of real analyticity of Hausdorff dimension for the given family of polynomials to prove the corresponding statement for the family .
Date: August 2012
Creator: Akter, Hasina
Partner: UNT Libraries

Conductor Awareness of, Knowledge of, and Attitude Toward Sound Intensity Levels Generated During Ensemble-based Instructional Activities in College-level Schools of Music

Description: In 2011, the National Association of Schools of Music (NASM) took an official position to recognize the importance of hearing health and injury prevention as a standard for all member-accredited institutions. This is the largest national acknowledgement promoting hearing health and safety within the music discipline and among students seeking a music degree in the United States. The purpose of the study is to describe what conductors (i.e., instructors) of college-based ensembles know about hearing health and the generation of sound intensity levels. The study aimed to describe the 1) current state of conductors’ awareness and knowledge of sound intensity levels, 2) current attitudes of conductors toward learning and sharing knowledge of sound intensity levels, and 3) current teaching practices of conductors in regard to equipment usage (e.g. sound level meter, noise dosimeter, hearing protection devices) relating to sound measurement and exposure. Findings indicate 80.2% of conductors (N = 162, 66% employed by NASM-accredited institutions) agree that sounds generated during ensemble-based instructional activities (EBIAs) in college-level schools of music are capable of harming human hearing, but 24.1% “do not know” if EBIAs they conduct ever exceed sound intensity levels capable of harming human hearing, 54.9% do not know “what services or resources” their home institutions offer/refer to students, 93% are never using a noise dosimeter, 40% have never had an audiology exam, and 70% have never used hearing protection during an EBIA. Conductors have a strong openness to change current teaching practices and inform themselves about hearing health, but few are personally informing and educating their students during the EBIA. The study serves to assist conductors and foster a new dialogue among their students, colleagues, staff, and administrators to revise current curriculum, explore sound measurement technologies, and evaluate current hearing health and safety issues inherent in the practice, performance, and ...
Date: August 2012
Creator: Albin, Aaron J.
Partner: UNT Libraries

British Labour Government Policy in Iraq, 1945-1950

Description: Britain during the Labour government's administration took a major step toward developing Iraq primarily due to the decision of Ernest Bevin, the Foreign Minister, to start a new British policy toward the Iraqi regimes that would increase the British influence in the area. This led to Bevin's strategy of depending on guiding the Iraqi regime to make economic and political reforms that would lead to social justice.
Date: December 2012
Creator: Alburaas, Theyab
Partner: UNT Libraries

The Rise of the Republicans: Party Realignment in Twentieth Century Texas

Description: This dissertation is a study of the political transformation of Texas during the twentieth century from a predominantly Democratic to a two-party state. It is commonly asserted that the fundamental conservatism of Texas voters led them to abandon the national Democratic Party as it embraced more liberal reforms. This shift led to a rise in support in Texas for the Republican Party, which continued to advocate a more conservative agenda. But this change demands a more thorough explanation at the local level, in part because such a study can also reveal other factors at work. This dissertation first examines how prohibition impacted the state's political status quo and provided an opportunity for the Republican Party to increase its numbers. It then discusses the New Deal and the growth of Texas's oil industry, and how government regulation shaped political developments. The impact of urbanization and suburbanization on Republican growth are also addressed, along with numerous campaigns that reflected the changes occurring in Texas's electorate during this time. Although Dwight D. Eisenhower's 1952 and 1956 wins in Texas were a strong indication of the realignment among Texas voters, it was John G. Tower's election to the United States Senate that served as the first catalyst for the Republicans' dream of a two-party state. Following the election of Tower, the Republicans faced setbacks from the landslide victory of Lyndon B. Johnson after the assassination of John F. Kennedy, followed by the Watergate scandal, but they managed to rebound effectively. Thus, in addition to addressing the question of what spurred the rise of the Republican Party in Texas during the first half of the twentieth century, this dissertation provides more nuanced answers to the question of how Texas became a two-party state by 1988, which of course paved the way for a Republican triumph ...
Date: December 2012
Creator: Antle, Michael L.
Partner: UNT Libraries

The Peer Created Motivational Climate in Youth Sport and Its Relationship to Psychological Outcomes and Intention to Continue in Sport Among Male Adolescents

Description: Social agents in the youth sport domain (coaches, parents, and peers) play a crucial role in developing the motivational approaches of youth sport athletes. One theory which has been useful in explaining the important role of such social agents has been Achievement Goal Theory (Nicholls, 1989). Specifically, Achievement Goal Theory was used to delineate various peer behaviors as being task-involving (Ntoumanis & Vazou, 2005) and was used to predict subsequent relationships relationship between the task-involving motivational-climate created by teammates and athletes’ mastery goal orientations and self-esteem, sport competence, enjoyment, and intention to continue playing sport. Participants were 405 boys aged 12-15 years. Using structural equation modeling, an exploratory analysis and confirmatory analysis revealed that higher levels of task-involving behaviors from peers predicted mastery goal orientation. Participants with higher mastery goal orientation reported greater sport competence, self-esteem, and more enjoyment; enjoyment was the strongest predictor of intention to continue. These findings both emphasize the importance of peer relationships within sport on a variety of motivationally and psychologically salient outcomes and provide direction for the development of training programs targeted to create positive and healthy sport experiences.
Date: August 2012
Creator: Atkins, Matthew R.
Partner: UNT Libraries

Consumer Perception of Brand Equity Measurement: a New Scale

Description: Brand equity is perhaps the most important marketing concept in both academia and practice. The term came into use during the late 1980s; and the importance of conceptualizing, measuring, and managing brand equity has grown rapidly in the eyes of practitioners and academics alike. This has resulted in several often-divergent view-points on the dimensions of brand equity, the factors that influence it, the perspectives from which it should be studied, and the ways to measure it. Many different definitions and ways to measure brand equity have been proposed, and most of them are based upon the definition: the added value with which a given brand endows a product. The two most influential conceptualizations of brand equity are Aaker and Keller. Aaker defines brand equity as a set of brand assets and liabilities linked to a brand, its name and symbol, that add to or subtract from the value provided by a product or service to a firm and/or to that firm’s customers. Keller defines consumer-based brand equity (CBBE) as the differential effect of brand knowledge on consumer response to the marketing of the brand. Currently, all research on brand equity has used the same conceptualization of the construct based on previously determined dimensions with no attempt to argue their validity. Given the importance of the concept of brand equity in marketing, as well as the need for the measurement of brand equity, the literature lacks an empirically based consumer-perceived brand equity scale. Since the brand is the consumer’s idea, the consumer is an active participant in the creation of equity for the brand. So if we want to understand and manage the intangible equity directly, we have to have the consumer’s help. This dissertation enriches and strengthens the current knowledge on brand equity by developing a new conceptualization and scale ...
Date: May 2012
Creator: Baalbaki, Sally Samih
Partner: UNT Libraries

The Creation of a Performance Edition of Gustav Mahler's Lieder Und Gesänge Aus Der Jungendzeit and Its Role in Bass Tuba Pedagogy

Description: When the tubist is first introduced to the bass tuba, Mahler's songs can be used as effective solo material. Through transcription, practice, and performance of art songs, novice bass tubists focus primarily on fundamental musical components such as tone quality, intonation, breathing, and musicianship. By identifying deficiencies in the current solo repertoire as related to the early stages of development on the bass tuba, I intend to address the need for more solo works through the transcription and performance of Mahler's Lieder und Gesänge aus der Jugendzeit.
Date: December 2012
Creator: Baker, Jeffrey T.
Partner: UNT Libraries

Multi-perspective, Multi-modal Image Registration and Fusion

Description: Multi-modal image fusion is an active research area with many civilian and military applications. Fusion is defined as strategic combination of information collected by various sensors from different locations or different types in order to obtain a better understanding of an observed scene or situation. Fusion of multi-modal images cannot be completed unless these two modalities are spatially aligned. In this research, I consider two important problems. Multi-modal, multi-perspective image registration and decision level fusion of multi-modal images. In particular, LiDAR and visual imagery. Multi-modal image registration is a difficult task due to the different semantic interpretation of features extracted from each modality. This problem is decoupled into three sub-problems. The first step is identification and extraction of common features. The second step is the determination of corresponding points. The third step consists of determining the registration transformation parameters. Traditional registration methods use low level features such as lines and corners. Using these features require an extensive optimization search in order to determine the corresponding points. Many methods use global positioning systems (GPS), and a calibrated camera in order to obtain an initial estimate of the camera parameters. The advantages of our work over the previous works are the following. First, I used high level-features, which significantly reduce the search space for the optimization process. Second, the determination of corresponding points is modeled as an assignment problem between a small numbers of objects. On the other side, fusing LiDAR and visual images is beneficial, due to the different and rich characteristics of both modalities. LiDAR data contain 3D information, while images contain visual information. Developing a fusion technique that uses the characteristics of both modalities is very important. I establish a decision-level fusion technique using manifold models.
Date: August 2012
Creator: Belkhouche, Mohammed Yassine
Partner: UNT Libraries

Investigating the Effects of Polypharmacy Among Elderly Patients with Diabetes on Glycemic Control and Clinical Outcomes in Home Health Care

Description: The focus of this research study is glycemic control in the presence of multiple morbidities and polypharmacy in homebound individuals with Type 2 diabetes aged 65 years and older. The research method is a quantitative retrospective cohort study of discharged patients of a nonprofit community-based home health agency from January 1, 2010, to December 31, 2011, using OASIS data. Glycemic control is assessed using the hA1C laboratory test following the recommendation of the American Diabetes Association. The study documents a moderate significant association between glycemic control, polypharmacy and comorbid conditions, indicating that homebound individuals with Type 2 diabetes aged 65 years and older are less likely to have optimal glycemic control in the presence of multiple morbidities and polypharmacy. There continues to be a need for scientific research in this population cohort; and the dose-response association between antidiabetic therapy interventions designed to lower blood glucose levels in the presence of chronic disease and polypharmacy.
Date: December 2012
Creator: Bernier, Shelia Alathia
Partner: UNT Libraries

Impacts of Postmodernity Factors on the Association Between Maternal Distress and Children's Delinquency Among Low-income Families

Description: This study investigates the effects of postmodern factors on the relationship between maternal distress and children's delinquency. It seeks to understand the factors associated with distress levels of mothers whose children exhibit delinquency in order to potentially decrease the cost associated with mental health problems especially in mothers. Another goal of this study is to contribute to the sociological analysis of mental health problems which seem to be the reserved domain of the discipline of psychology and related subfields. The data came from the third wave of the 3-city study with N = 1835. The ages of the children range from 5 to 18 years old. The analysis of the data using regression analysis suggests children's delinquency significantly affects maternal distress in mothers. The study also indicates postmodernity factors did not moderate the association between maternal distress and children's delinquency. However, postmodern factors have significant, separate, and direct effects on maternal distress. For example, employment and religion have positive influences on maternal distress. The research points toward weakness in the postmodern perspective. It also underlines the importance of a sociological approach to the assessment and treatment of distress problems among mothers with low-income. Agencies working with low-income families should integrate the sociological approach in their intervention programs. Additionally, the study uncovers possible problems with assessment criteria used by these agencies to determine eligibility for assistance among low-income families such as education levels; and consequently calls for further investigation.
Date: December 2012
Creator: Bessa, Yawo
Partner: UNT Libraries

Between Comancheros and Comanchería: a History of Fort Bascom, New Mexico

Description: In 1863, Fort Bascom was built along the Canadian River in the Eroded Plains of Territorial New Mexico. Its unique location placed it between the Comanches of Texas and the Comancheros of the Sangre de Cristo Mountains. This post was situated within Comanchería during the height of the United States Army's war against the Southern Plains Indians, yet it has garnered little attention. This study broadens the scholarly understanding of how the United States Army gained control of the Southwest by examining the role Fort Bascom played in this mission. This includes an exploration of the Canadian River Valley environment, an examination of the economic relationship that existed between the Southern Plains Indians and the mountain people of New Mexico, and an account of the daily life of soldiers posted to Fort Bascom. This dissertation thus provides an environmental and cultural history of the Canadian River Valley in New Mexico, a social history of the men stationed at Fort Bascom, and proof that the post played a key role in the Army's efforts to gain control of the Southern Plains Indians. This study argues that Fort Bascom should be recognized as Texas' northern-most frontier fort. Its men were closer to the Comanche homeland than any Texas post of the period. Its records clearly show that the Army used Fort Bascom as a key forward base of operations against Comanches and Kiowas. An examination of Bascom's post returns, daily patrols, and major expeditions allows its history to provide a useful perspective on the nineteenth-century American Southwest.
Date: August 2012
Creator: Blackshear, James Bailey
Partner: UNT Libraries

Impact of Video Presentation Features on Instructional Achievement and Intrinsic Motivation in Secondary School Learners

Description: This study analyzed instructional achievement and intrinsic motivation among 21st century secondary students utilizing a video lecture incorporating both student reaction cutaway images and immediate content interaction within the lecture. Respondents (n = 155) were from multiple classes and grade levels at a suburban Texas high school. Four groups of students viewed the identical lecture with differing video and content interaction treatments. Students responded to a pretest/posttest survey to assess academic achievement in addition to an intrinsic motivation instrument to assess student interest. Group one (the control group) viewed the 12 minute lecture without enhancement. A second group viewed the identical lecture with student reaction shots inserted in the video. Another group viewed the lecture with content question intervention inserted into the video. The final group saw the lecture with the student reaction shots and content question intervention combined in the video. A repeated measures multivariate analysis of variance (MANOVA) was used to compare results from a 14 item pretest/posttest. Combined, the groups showed no significance (p = .069) indicating no associations were identified by the experiment. Although no association was identified, this may be a reflection of the generic nature of the video lecture and the lack of association with the experiment and actual classroom content within their courses. Students also completed the Intrinsic Motivation Instrument which was analyzed using a MANOVA. Although no significant findings were present in either group viewing the student reaction or the content question interaction treatments individually, the group viewing the combined treatment showed significance in three scales: Interest/Enjoyment (p = .007), Perceived Competence (p = .027) and Effort/Importance (p = .035) Recommendations for refinement of the current experiment as well as future studies are provided.
Date: December 2012
Creator: Bland, Ronald B.
Partner: UNT Libraries

A Study of the Technological, Instructional, and Motivational Factors Affecting Phr Certification Exam Outcomes

Description: Although previous studies have considered the factors affecting other certification exam outcomes, they have not examined those that are related to performance on the Professional in Human Resources (PHR) exam. In response to that need, this study specifically investigates technology and training factors that affect self-efficacy and self-set goals, and through them, influence PHR certification exam results. The target population for the study consisted of recent examinees who had taken a formal PHR examination preparation class or used another form of exam preparation training. The survey results were analyzed using partial least squares modeling techniques, and mediation effects were then tested. The results demonstrated that PHR training self-efficacy affected PHR exam self-efficacy and self-set goals. These factors then had an impact on PHR exam scores. Also, the results of task-technology fit were indirectly related to PHR training self-efficacy through a multiple mediation model that included the instructional factor of time on task and the technology factor of perceived usefulness. Surprisingly, time spent on practice exam questions was found to be negatively related to PHR certification exam scores. Finally, instructional feedback indirectly affected outcomes through its positive relationship to self-set goals. The results of the research should help training professionals and examinees in structuring PHR exam training and preparation activities. They also suggest avenues for improving outcomes in other similar types of training.
Date: May 2012
Creator: Bonner, David M.
Partner: UNT Libraries

Knowledge Discovery of Nanotube Mechanical Properties With an Informatics-Molecular Dynamics Approach

Description: Carbon nanotubes (CNT) have unparalleled mechanical properties, spanning several orders of magnitude over both length and time scales. Computational and experimental results vary greatly, partly due to the multitude of variables. Coupling physics-based molecular dynamics (MD) with informatics methodologies is proposed to navigate the large problem space. The adaptive intermolecular reactive empirical bond order (AIREBO) is used to model short range, long range and torsional interactions. A powerful approach that has not been used to study CNT mechanical properties is the derivation of descriptors and quantitative structure property relationships (QSPRs). For the study of defected single-walled CNTs (SWCNT), two descriptors were identified as critical: the density of non-sp2 hybridized carbons and the density of methyl groups functionalizing the surface. It is believed that both of these descriptors can be experimentally measured, paving the way for closed-loop computational-experimental development. Informatics can facilitate discovery of hidden knowledge. Further evaluation of the critical descriptors selected for Poisson’s ratio lead to the discovery that Poisson’s ratio has strain-varying nonlinear elastic behavior. CNT effectiveness in composites is based both on intrinsic mechanical properties and interfacial load transfer. In double-walled CNTs, inter-wall bonds are surface defects that decrease the intrinsic properties but also improve load transfer. QSPRs can be used to model these inverse effects and pinpoint the optimal amount of inter-wall bonds.
Date: May 2012
Creator: Borders, Tammie L.
Partner: UNT Libraries

After the Planes

Description: The dissertation consists of a critical preface and a novel. The preface analyzes what it terms “polyvocal” novels, or novels employing multiple points of view, as well as “layered storytelling,” or layers of textuality within novels, such as stories within stories. Specifically, the first part of the preface discusses polyvocality in twenty-first century American novels, while the second part explores layered storytelling in novels responding to World War II or the terrorist attacks of 9/11. The preface analyzes the advantages and difficulties connected to these techniques, as well as their aptitude for reflecting the fractured, disconnected, and subjective nature of the narratives we construct to interpret traumatic experiences. It also acknowledges the necessity—despite its inherent limitations—of using language to engage with this fragmentation and cope with its challenges. The preface uses numerous novels as examples and case studies, and it also explores these concepts and techniques in relation to the process of writing the novel After the Planes. After the Planes depicts multiple generations of a family who utilize storytelling as a means to work through grief, hurt, misunderstanding, and loss—whether from interpersonal conflicts or from war. Against her father’s wishes, a young woman moves in with her nearly-unknown grandfather, struggling to understand the rifts in her family and how they have shaped her own identity. She reads a book sent to her by her father, which turns out to be his story of growing up in the years following World War II. The book was intercepted and emended by her grandfather, who inserts his own commentary throughout, complicating her father’s hopes of reconciliation. The novel moves between two main narratives, one set primarily in 1951 and the other in the days and weeks immediately prior to September 11, 2001.
Date: May 2012
Creator: Boswell, Timothy
Partner: UNT Libraries

Antigravity

Description: This dissertation contains two parts: Part I, which discusses the elegy of possessive intent, a subgenre of the contemporary American elegy; and Part II, Antigravity, a collection of poems. English elegies have been closely rooted to a specific grief, making the poems closer to occasional poems. The poet—or at least the poet’s speaker—seeks some kind of public consolation for (often) a private loss. The Americanized form does stray from the traditional elegy yet retains some of its characteristics. Some American elegies memorialize failed romantic relationships rather than the dead. In their memorials, these speakers seek a completion for the lack the broken relationship has created in the speakers’ lives. What they can’t replace, they substitute with something personal. As the contemporary poem becomes further removed from tradition, it’s no surprise that the elegy has evolved as well. Discussions of elegies have never ventured into the type of elegy that concerns itself with the sort of unacknowledged loss found in some contemporary American poems of unrequited love. These poems all have speakers who willfully refuse to acknowledge the loss of their love-objects and strive to maintain control/ownership of their beloveds even in the face of rejection.
Date: August 2012
Creator: Bowen, Ashley Hamilton
Partner: UNT Libraries

“Sounds for Adventurous Listeners”: Willis Conover, the Voice of America, and the International Reception of Avant-garde Jazz in the 1960S

Description: In “Sounds for Adventurous Listeners,” I argue that Conover’s role in the dissemination of jazz through the Music USA Jazz Hour was more influential on an educational level than what literature on Conover currently provides. Chapter 2 begins with an examination of current studies regarding the role of jazz in Cold War diplomacy, the sociopolitical implications of avant-garde jazz and race, the convergence of fandom and propaganda, the promoter as facilitator of musical trends, and the influence of international radio during the Cold War. In chapter 3 I introduce the Friends of Music USA Newsletter and explain its function as a record of overseas jazz reception and a document that cohered a global network of fans. I then focus on avant-garde debates of the 1960s and discuss Conover’s role overseas and in the United States. Chapter 4 engages social purpose and jazz criticism in the 1960s. I discuss Conover’s philosophy on social responsibility, and how his contributions intersected with other relevant discourses on race on the eve of the civil rights movement. I argue that Conover embodied two personas: one as jazz critic and promoter in the United States, and the other as an international intermediary. In chapter 5 I discuss how Conover presented the avant-garde to his overseas audience. I argue that through his efforts to broadcast jazz impartially, he legitimized avant-garde and emphasized its qualities as art music. In chapter 6 I explore fandom studies as they apply to the formation of Music USA as a global fan network. I discuss the early roots of Conover’s interest in science fiction fandom as a motivation for the implementation of the Friends of Music USA (FOMUSA) groups. Chapter 7 concludes in a discussion of the deification of Conover though the medium of radio in the midst of the Cold War. ...
Date: August 2012
Creator: Breckenridge, Mark A.
Partner: UNT Libraries

Early College High School: Hispanic Students’ Perceptions and Experiences From a Texas Campus

Description: Early college high school (ECHS) is a dual enrollment program that allows high school students to earn college credits while in high school. ECHS was developed with the intention of attracting students to pursue a 4-year college degree, especially students who might not attend college without intervention. The program targets students from low-income families, students who have low academic achievement, and students from minority groups including Hispanics, African Americans, and Native Americans. The purpose of this study was to explore the perceptions and opinions of Hispanic students about their experiences in an ECHS, and to better understand how their ECHS experiences affected motivation to engage in academics. The expectancy theory and college-going culture provided the theoretical framework for this case study. Semi-structured interviews captured the experiences of the participants. The study focused on 10 Hispanic students, 5 seniors and 5 juniors, enrolled at an ECHS located on a community college campus in Texas. The study found that students with higher motivation to work at high school and college courses had several reasons for choosing to attend ECHS. The reasons included a chance to earn a high school diploma and associate’s degree simultaneously, free college tuition, and an accelerated program to get through college. The students also identified rewarding outcomes for completing college. Those outcomes included satisfying career, personal satisfaction, ability to provide for their family and making their family proud as the first high school graduate and college attendee. One student had a lower motivation to work at high school and college work. He chose to attend ECHS to seek more freedom than a traditional high school. He was not certain about graduating from high school and doubtful about college graduation. This study contributes to the ECHS literature by providing details on students’ experiences at an ECHS. Using the qualitative ...
Date: May 2012
Creator: Brenner, Rose K.
Partner: UNT Libraries

Texas Principals’ Perceptions of Professional Development Provided By the Local School District

Description: The purpose of this study was to investigate the perceptions of Texas principals as to the degree to which their local school districts are meeting their ongoing professional development need. The study was conducted to analyze and describe the survey and interview responses of Texas principals as to their perceptions of the degree to which their local school districts provide learning experiences aligned with their needs. Texas principals’ perceptions regarding the characteristics of important and meaningful professional learning experiences were explored. The study included an analysis of the extent to which Texas principals perceive that the learning opportunities they are provided adequately meet those needs. Additionally, various factors influencing principals and their perceptions were examined. These factors included type of school, school setting, school system size, characteristics of students, and characteristics of the principals. The perceptions of school district staff development administrators were analyzed regarding topic importance, topic provision by the local district, and the usefulness of those topics. Finally, the perceptions of the principals and the staff development administrators were compared. Thirteen school districts participated in this study. Of the 273 principals surveyed, 155 completed the survey, yielding a return rate of 56.8%. One campus principal from each of the 13 districts was interviewed. Additionally, 13 district staff development administrators were surveyed and interviewed. Data analysis produced several findings. First, as a whole, principals rated the importance of each of the 22 proposed professional development topics at or above the important level. However, the degree to which local school districts provided training on those topics varied according to the size of the district and the setting of the campus. Second, the relationship between the professional development provided and the quality, or usefulness, of that school district’s training was considered strong for several of the 22 topics. Finally, principals and ...
Date: August 2012
Creator: Brockman, Mary Elizabeth
Partner: UNT Libraries

Predictors of Quality of Life (Qol): Comparing Baby Boomers, Older Adults, and Younger Adults Using Data From the 2010 National Health Interview Survey

Description: The purpose of this study was to identify factors that predict quality of life (QOL) for aging adults and to examine and compare Baby Boomers', Older Adults' and Younger Adults' responses to the 2010 National Health Interview Survey/QOL Functioning and Disability. Significant findings included several significant values based on the multivariate regression to estimate a model to predict QOL. In particular, being male, four ethnicities other than white, being older than Boomer, age in 10 years, the Functional Difficulty Index, the Functional Limitation Index scores, chronic heart disease, asthma, and arthritis all had significant p values. Adults with chronic heart disease, asthma, or arthritis scored lower on the QOL index, but cancer, stroke, or diabetes were not associated with the QOL index. Two hypotheses had strong support. Lower scores on both the Functional Difficulty Index and the Functional Limitation Index yielded lower QOL scores. Further research recommendations include establishing reliability and validity of the QOL index; running additional regressions for demographics (ethnicity, marital status, etc.) to predict possible combinations of variables predicting QOL or barriers to QOL; and investigating the viability of incorporating the QOL index into an electronic medical record (EMR) dashboard parameter to serve as a screening mechanism for those aging adults most at risk for chronicities or co-morbidities that place them at risk for losing their ability to age in place in the home of their choosing.
Date: December 2012
Creator: Bryce, Helen Roult
Partner: UNT Libraries

Ecology and Recolonization of Benthic Macroinvertebrates in a Groundwater-dependent Stream in North Central Texas During a Supra-seasonal Drought

Description: Extreme climatic events such as droughts are known to eliminate aquatic biota and alter community structure and function. Perennial headwater springs provide important drought refugia to benthic macroinvertebrates and an important source of colonists via drift or aerial adults to intermittent streams post-drought. During a supra-seasonal drought in North-central Texas summer and fall 2006, benthic macroinvertebrates from persistent groundwater-dependent macrohabitats of varying hydrological connectivity and riparian shading were studied: perennial riffles, connected pools, shaded disconnected pools, and full sun disconnected pools. Riffles were a distinct habitat with significantly higher taxa richness, proportion of lotic taxa, diversity and evenness than other macrohabitats. Macrohabitats were found to be important refugia for 106 benthic macroinvertebrates and 4 microcrustacean taxa. Throughout the extreme drought, perennially flowing habitats were refugia to 19 taxa (17.9% total taxa) not collected in disconnected pools. Shaded disconnected pools contained lotic taxa not previously known to be able to complete their lifecycles in lentic habitats, emphasizing the importance of groundwater effluent and shading. With the resumption of flow at a downstream intermittent site of Ash Creek in mid-October 2006, an annual recolonization study was conducted comparing the perennial headwaters’ benthic macroinvertebrate taxa richness, densities and community ecology with the downstream intermittent site. The headwaters supported higher mean taxa richness than the intermittent site over the duration of the study (ANOVA P < 0.001). However, the unexpected result of overall decreasing taxa richness at the perennial headwater site from August 2006 to April 2008 appears to reflect lag effects of the supra-seasonal drought combined with effects of multiple spates of 2007, which are factors confounding the point of recovery for taxa richness. Recovery of taxa richness at the intermittent site took 9 months compared to 1 to 2 months reported in other arid and semi-arid streams in the United States recovering ...
Date: May 2012
Creator: Burk, Rosemary A.
Partner: UNT Libraries

Affective Forecasting: the Effects of Immune Neglect and Surrogation

Description: Studies of affective forecasting examine people’s ability to predict (forecast) their emotional (affective) responses to future events. Affective forecasts underlie nearly all decisions people make and the actions they take. However, people engage in systematic cognitive errors when making affective forecasts and most often overestimate the intensity and duration of their emotional responses. Understanding the mechanisms that lead to affective forecasting errors (e.g., immune neglect) and examining the utility of methods for improving affective forecasting errors (e.g., surrogation) can provide highly valuable information for clinicians as they assist clients in determining their goals both for therapy and for life. The first purpose of the current study was to determine if affective forecasting errors due to immune neglect lead to misjudgments about the relative emotional impact of minor versus moderate negative experiences (i.e., trauma severity). The second purpose was to examine the utility of surrogation for improving affective forecasts. Potential interaction effects between these two variables were also examined. The current study utilized a 2 (Trauma Severity: minor, moderate) X 3 (Prediction Information: surrogation information only, simulation information only, both types of information) experimental design. Undergraduates were recruited via the SONA system and randomly assigned to one of the six experimental conditions. A preliminary study was conducted to obtain surrogation information for use in the main study. All participants in the main study predicted how they would feel 10 minutes after receiving negative personality feedback, using a 10-point scale ranging from (1) very unhappy to (10) very happy. These predictions constitute their affective forecasts. All participants then actually received the negative personality feedback (ostensibly from another participant, a peer, in a nearby room) and reported their actual affective states ten minutes later, using the same scale. These ratings constitute their affective reports. Affective forecasting error was calculated as the difference between ...
Date: August 2012
Creator: Burkman, Summer Dae
Partner: UNT Libraries