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21
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504 Matching Results
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A Description of Sixth Grade Choir Programs: Student Grouping According to Gender and Teacher Perception of Adolescent Behavior and Vocal Physiology
The purpose of this study was to provide a description of teacher perceptions concerning behavioral and physiological vocal issues among current gender groupings in sixth-grade choir classrooms through the collection of survey research data. Participants selected for this study consisted of registered Dallas-Fort Worth metropolitan area choral directors of the Texas Music Educators Association. Results of the study indicated that more girls were enrolled in sixth-grade choir than boys and that mixed choirs were more common than gender-specific choirs in sixth grade. Results also indicated that teachers perceived evidence of early voice change among both sixth grade boys and girls, and that there was a difference in behavior as students showed signs of puberty.
Date:
May 2013
Creator:
Kotara, Tammy G.
System:
The UNT Digital Library
Consistency, Consolidation, and Cognition in Autobiographical Memories: a Flashbulb Memory Approach
Flashbulb memories are highly vivid and long-lasting memories for events that are emotionally significant and personally important. These memories are held in very high confidence in accuracy over an extended period. In particular, individuals believe that they can remember the personal details surrounding the event such as where they were and what they were doing at the time the event occurred. Evidence from research, however, indicates that this may not be the case. The study of flashbulb memories has typically been confined to negative events such as September 11, 2001. In the current study, we employ the methods of Talarico and Rubin (2003) to investigate flashbulb memory formation to a positive event. The event is the assassination of Osama bin Laden, which resonated as a highly positive event for many Americans evidenced by the thousands of people flooding the streets of Washington, D.C. and New York City to celebrate. We examined various memory properties over a one-year period, including vividness, rehearsal, belief in accuracy, and consistency. Results confirm the formation of flashbulb memories to the assassination event, but results did not support many of the proposed hypotheses. Some differences were found for different testing groups (i.e., immediate versus one week …
Date:
May 2013
Creator:
Kraha, Amanda
System:
The UNT Digital Library
A Legal Analysis of Litigation Against Mississippi Educators and School Systems Under the Mississippi Tort Claims Act
This dissertation analyzes court cases involving tort claims filed against Mississippi public schools and their employees under the Mississippi Tort Claims Act. The question addressed was: How have the Mississippi courts interpreted the Mississippi Tort Claims Act in litigation against Mississippi school districts and their employees? The intent of this dissertation is to add to the understanding of the legal concept of sovereign immunity as it has been applied to public schools and their employees. This study's focus centers on litigation in the state of Mississippi involving school districts. Chapter 2 provides a historical summary of sovereign immunity (also known as governmental immunity) in the United States and the state of Mississippi up to the enactment of the Mississippi Tort Claims Act as well as an overview of general legal concepts involved in tort claims. Chapter 3 explains the research design and methodology used. This dissertation relied on legal principles of research and document analysis used in the legal profession. Chapter 4 consists of a thorough analysis of published case law brought before the Mississippi courts pertaining to the Mississippi Tort Claims Act and public school systems and their employees. Finally, chapter 5 describes the key findings of the analysis …
Date:
May 2013
Creator:
Kriesel-Hall, Sara B.
System:
The UNT Digital Library
An Analysis of Pitch Organization in Villa-lobos's Rudepoêma
Heitor Villa-Lobos (1887-1959) stands central to the music history of the Brazilian twentieth century. His music represents a synthesis of the European art influences he absorbed and his quest to find a true Brazilian identity, which was not rooted in the deliberate imitation of Brazilian folk elements, but rather in the natural assimilation of them in his compositional style. His early compositions embody strong post-romantic, impressionistic tendencies, especially in regard to their harmonies and use of tone color, whereas the works from the 1920's and onwards show Villa-Lobos increasingly asserting his unusual and strong voice. Villa-Lobos's large-scale composition for piano, Rudepoêma, was composed between 1921 and 1926, and stands as one of the most significant contributions to the Latin-American piano literature. Despite of its importance in Villa-Lobos's oeuvre, it has largely eluded analytical attention. Discourse on Villa-Lobos is often marked by a somewhat one-dimensional approach that identifies the folk and rhythmic elements as the most important characteristics of his compositional style, and displays a certain reticence with regard to in-depth analysis of other parameters of his works. This study redresses the imbalance in the general approach to analytical assessment of Villa-Lobos's oeuvre by illustrating that pitch organization plays an indispensable …
Date:
May 2013
Creator:
Kruger, Esthea
System:
The UNT Digital Library
A New Approach for Transition Metal Free Magnetic Sic: Defect Induced Magnetism After Self-ion Implantation
SiC has become an attractive wide bandgap semiconductor due to its unique physical and electronic properties and is widely used in high temperature, high frequency, high power and radiation resistant applications. SiC has been used as an alternative to Si in harsh environments such as in the oil industry, nuclear power systems, aeronautical, and space applications. SiC is also known for its polytypism and among them 3C-SiC, 4H-SiC and 6H-SiC are the most common polytypes used for research purposes. Among these polytypes 4H-SiC is gaining importance due to its easy commercial availability with a large bandgap of 3.26 eV at room temperature. Controlled creation of defects in materials is an approach to modify the electronic properties in a way that new functionality may result. SiC is a promising candidate for defect-induced magnetism on which spintronic devices could be developed. The defects considered are of room temperature stable vacancy types, eliminating the need for magnetic impurities, which easily diffuse at room temperature. Impurity free vacancy type defects can be created by implanting the host atoms of silicon or carbon. The implantation fluence determines the defect density, which is a critical parameter for defect induced magnetism. Therefore, we have studied the influence …
Date:
May 2013
Creator:
Kummari, Venkata Chandra Sekhar
System:
The UNT Digital Library
A Descriptive Analysis of the Use and Effect of a Self-management Project in an Undergraduate Course in Behavior Analysis
Undergraduate male and female students enrolled in an introductory behavior analysis course with minimal instruction on self-management were given modified exploratory logs to use in a self-management project. Students self-monitored behavior via the log, constructed their own interventions, and reported changes in behavior and extent of success in a write up at course end. Changes in self-reported descriptions in the logs as well as the written results of a pre and post survey of emotional responses were counted. Successful self-management project interventions were reported by most students. Correspondence between planned and actual events increased. Negative reinforcement procedures characterized most students' intervention. Correspondence between events at pre and post and actual log reports was highest at post.
Date:
May 2013
Creator:
Lamancusa, Michelle
System:
The UNT Digital Library
Transcription of Baroque Works for Classical Guitar: J S Bach's Sonata in D Minor (Bwv 964) As Model
Continuing the common practice of composers of the Baroque period to transcribe their own or other composers' works for a different instrument, this dissertation contributes to studies of J. S. Bach's repertory as the source of program material for the classical guitar. It is from differences revealed through a comparative analysis of Bach's Violin Sonata No. 2 (BWV 1003) and his harpsichord arrangement thereof – Sonata in D minor (BWV 964) – that principles of transcription are derived and organized according to descriptive categories. Emulating the composer-transcriber with knowledge of the capabilities and limitations of the instruments involved, the arrangement procedures are applied to the classical guitar. In so doing, this study addresses the emerging challenges and complexities in creating an idiomatic arrangement.
Date:
May 2013
Creator:
Lang, Matthias
System:
The UNT Digital Library
The Use of a Real Life Simulated Problem Based Learning Activity in a Corporate Environment
This narrative study examines using a real life simulated problem base learning activity during education of clinical staff, which is expected to design and develop clinically correct electronic charting systems. Expertise in healthcare does not readily transcend to the realm of manipulating software to collect patient data that is pertinent to the care of patients. To gain the expertise, troubleshooting abilities and knowledge required to maintain their clinical system, each participant in this study has gone through the RLSPBL activity. Education in the corporate world must be effective and efficient while providing a good return on the educational investment. Corporate education must use material contextually similar to a workplace, and the techniques for education must provide both near and far transfer of the material. Ten individuals (eight clinical, two non-clinical) who work across the United States were interviewed; their reflections on their career as a clinical interface designer are told here. The participants varied in their age, educational background, and current work responsibility and computer experience. Their insights revealed four major themes which summarize their stories: problem-based learning, collaboration, hands-on activities and the use of a real-life simulated problem-based learning activity.The clinical environment requires patient safety as a paramount parameter …
Date:
May 2013
Creator:
Laurent, Mark A.
System:
The UNT Digital Library
Utilizing Traditional Environmental Knowledge in Industrialized Nations to Assist in Disaster Evacuations
Using traditional ecological knowledge (TEK), which is typically reserved for understanding how indigenous societies function successfully, and applying this to developed countries' ideas of disaster planning and response, emergency planners, public officials, and lay-persons can gain an understanding of their environment. Stories, history, education, and The waterborne evacuation of Lower Manhattan on September 11, 2001 provides a backdrop with which to test the tenets of TEK in a developed nation setting. This dissertation has found that TEK was effective when used by a developed nation and should be integrated into the current disaster system in the US.
Date:
May 2013
Creator:
Lea, Brandi M.
System:
The UNT Digital Library
Graduate Students' Collaborative Information Seeking in a Group-based Learning Setting
Working with others within an organization can have a variety of positive effects, and the benefits of collaboration have been discussed in various disciplines. In information science, interest in collaborative information seeking, including collaborative information seeking by students in an online learning environment is expanding. This study was aimed at understanding graduate students' collaborative information seeking behaviors through the process of a group project, including factors that affected students' perceptions of collaborative work and their difficulties during the collaborative process. The research was based on Yue and He's model, which describes information users' collaborative communication and information behaviors, and Kuhlthau's model, which describes users' individual information seeking behaviors. The participants were 43 students enrolled in a master's level course delivered primarily online. The students were required to work together in groups to complete a research project. Data were collected through a background survey, behavior survey, and online communication texts and analyzed using descriptive statistics, statistical tests, and content analyses. The results showed significant changes in collaborative and information seeking behaviors and perceptions across three stages of the project during the semester. Theoretical, practical, and methodological implications for future research are discussed.
Date:
May 2013
Creator:
Lee, Jisu
System:
The UNT Digital Library
Homeless Predictors in the Older Adult Population
This secondary research study uses data from two convenience samples of homeless persons in Central Arkansas collected during 2004 and 2011 Point in Time Counts. The prevalence of predictors of homelessness are compared across years, and also compared by age (<50 and > 50) controlling for year of survey. The number of older adults increased significantly between 2004 and 2011 surveys, and reporting serious mental illness and veteran status significantly decreased from 2004 to 2011. Age differences were noted in 2004 with older adults more likely to report serious mental illness in comparison to younger adults. Older adults were also more likely to report veteran status in comparison to younger adults during both the 2004 and 2011 surveys. The predictors of homelessness -- including serious health problems, substance abuse, race, age, and developmental disabilities-- remained fairly consistent from 2004 to 2011 and across "age groups". In addition to Point in Time data, qualitative surveys and interviews of providers were performed for their observations of the older homeless population. Providers indicated their belief that the older homeless population is increasing. Providers suggested possible challenges and reasons for the increase among older adults who are homeless. In central Arkansas, service providers feel …
Date:
May 2013
Creator:
Lewallen, Jina P.
System:
The UNT Digital Library
A Survey of Four Original Works for Clarinet and Guitar and Their Effect on Compositional Output for the Repertoire
In the last three decades there has been a surge in original compositions for clarinet and guitar resulting in the repertoire virtually doubling in size. However, documentation and research of original works in published sources remains limited and is quickly becoming outdated. This document reviews the current resources and reviews the newer published materials. Early chamber music works for guitar and clarinet typically required the guitar to supply harmonic support to the clarinet's upper voice, which carried the themes. An examination of the earliest works, which date from the early nineteenth century, suggests, in other words, that the two parts were not treated equally, in contrast to modern-day chamber music, in which melodic elements are proportionally balanced between the two instruments. A critical survey and comparison of four significant works from the repertoire reveals a development toward motivic balance, a progression towards melodic equality that continued in subsequent compositions. The four works surveyed are: Heinrich Neumann's Serenata Svizzera Op.29, Ferdinand Rebay's Sonata for Clarinet and Guitar No.2 in A minor, Libby Larsen's Blue Third Piece, and Gernot Wolfgang's Four Miniatures. An extensive compilation of over 300 original published and unpublished works for clarinet and guitar, bass clarinet and guitar, and …
Date:
May 2013
Creator:
Lignitz, Kellie
System:
The UNT Digital Library
The Character of Environmental Citizenship: Virtue Education for Raising Morally Responsible Individuals
Surely, moral education is not merely intended to result in theoretical knowledge, but instead attempts to change people's behavior. However, when examining and evaluating current trends in moral education, it appears that hitherto moral education has fallen short of its goal to make people better. In this paper, I try to determine what has caused this perceived failure of moral education and conclude that approaches that focus on teaching moral reasoning skills rather than on teaching actual moral content, i.e., values and virtues, are generally ineffective for moral improvement. However, a more traditional form of moral education, namely character education, appears to be a viable alternative to the moral reasoning methods. Since character education can be regarded as the practical application of virtue ethics, I first describe and evaluate virtue ethics and defend it against potential criticisms. I then examine what methods are effective for teaching virtues, and how such methods can potentially be incorporated into the curriculum. Since virtues cannot be taught through theoretical instruction, the acquisition of good habits constitutes the necessary foundation for the establishment of good moral character. Some methods that have been suggested for laying the foundation for virtue are the use of stories, role …
Date:
May 2013
Creator:
Lindemann, Monica A.
System:
The UNT Digital Library
Automated Treetop Detection and Tree Crown Identification Using Discrete-return Lidar Data
Accurate estimates of tree and forest biomass are essential for a wide range of applications. Automated treetop detection and tree crown discrimination using LiDAR data can greatly facilitate forest biomass estimation. Previous work has focused on homogenous or single-species forests, while few studies have focused on mixed forests. In this study, a new method for treetop detection is proposed in which the treetop is the cluster center of selected points rather than the highest point. Based on treetop detection, tree crowns are discriminated through comparison of three-dimensional shape signatures. The methods are first tested using simulated LiDAR point clouds for trees, and then applied to real LiDAR data from the Soquel Demonstration State Forest, California, USA. Results from both simulated and real LiDAR data show that the proposed method has great potential for effective detection of treetops and discrimination of tree crowns.
Date:
May 2013
Creator:
Liu, Haijian
System:
The UNT Digital Library
Optimizing Non-pharmaceutical Interventions Using Multi-coaffiliation Networks
Computational modeling is of fundamental significance in mapping possible disease spread, and designing strategies for its mitigation. Conventional contact networks implement the simulation of interactions as random occurrences, presenting public health bodies with a difficult trade off between a realistic model granularity and robust design of intervention strategies. Recently, researchers have been investigating the use of agent-based models (ABMs) to embrace the complexity of real world interactions. At the same time, theoretical approaches provide epidemiologists with general optimization models in which demographics are intrinsically simplified. The emerging study of affiliation networks and co-affiliation networks provide an alternative to such trade off. Co-affiliation networks maintain the realism innate to ABMs while reducing the complexity of contact networks into distinctively smaller k-partite graphs, were each partition represent a dimension of the social model. This dissertation studies the optimization of intervention strategies for infectious diseases, mainly distributed in school systems. First, concepts of synthetic populations and affiliation networks are extended to propose a modified algorithm for the synthetic reconstruction of populations. Second, the definition of multi-coaffiliation networks is presented as the main social model in which risk is quantified and evaluated, thereby obtaining vulnerability indications for each school in the system. Finally, maximization …
Date:
May 2013
Creator:
Loza, Olivia G.
System:
The UNT Digital Library
Recidivism Among Juvenile Sex Offenders in Texas
Juvenile sex offenders represent a serious and violent group of delinquents. Despite the severity of their crimes, the literature focusing on risk factors that influence recidivism and the types of re-arrest after incarceration is lacking. This research study examined 499 determinately sentenced juvenile sex offenders that were released from the Texas Juvenile Justice Department. This sample was then followed for three years upon their release. This analysis revealed that 51.5 percent were re-arrested for any offense while 45.91 percent were re-arrested for a felony offense. This study identified a number of risk factors relative to JSO recidivism. These factors include having a history of emotional abuse, race being African American, being gang affiliated, having a larger number of previous adjudications, and having higher counts of institutional misconduct infractions. Those JSOs older at intake and release, and those who were incarcerated for longer periods of time were less likely to re-offend upon release. Lastly, this study ends with suggestions for future research as well as policy implications geared toward juvenile sex offenders.
Date:
May 2013
Creator:
Martinez, Crystal G.
System:
The UNT Digital Library
Listening to the Freshman Voice: First-year Self-efficacy and College Expectations Based on High School Types
This quantitative study used Astin's I-E-O theory to explore the relationship between a college freshman's high school background and academic self-efficacy. The Beginning College Survey of Student Engagement was used to measure academic self-efficacy across four types of high schools. Student gender and precollege experiences (dual-credit and communication assertiveness) were used as control. A total of 15,400 first-year students were included in this study. An ANOVA was used to examine the differences between groups, and ordinary least-square analysis was used to study the factors that affect academic self-efficacy. Results showed statistically significant difference in academic self-efficacy between public and private religious high school graduates. Specifically, graduates of public high schools had statistically higher academic self-efficacy than graduates of private religious high schools (p < .001). Additionally, females and participants of dual-credit courses also tended to have higher academic self-efficacy. Finally, analysis revealed that a first-year student's communication confidence is highly correlated to their academic self-efficacy. Results confirm in-coming first-year students perceive higher education engagement differently based on traits attributed to their precollege experiences. Results point to criteria colleges may be able to use in identifying freshmen at risk for low academic self-efficacy and, therefore, for problems in retention and degree …
Date:
May 2013
Creator:
May, Paul B.
System:
The UNT Digital Library
Investigating Postpartum Depression in Southern Rural Egypt and Effects of Sertraline on Fsh and Lh Gene Expression on Fathead Minnows Using Rt-pcr
Postpartum depression (PPD) is a major health problem that affects many women worldwide. In Egypt, PPD is neglected despite the expected high prevalence rate among women during the transition period after the Egyptian revolution. This research investigated the prevalence, risk factors, and interventions of postpartum depression in southern rural Egypt. Interviews were conducted with 57 participants recruited from public and private hospitals. Questionnaires and the Arabic version of the Edinburgh Postnatal Depression Scale were administered. The prevalence of PPD is 73.7%. PPD is associated with low income and age at childbirth. Most participants regarded screening mothers after childbirth for PPD as effective; in comparison to, antidepressants that were regarded by most participants as ineffective. Women in southern rural Egypt prefer high number of pregnancies, so investigating the influence of sertraline, an antidepressant medication, on female hormones becomes important. In this research, fathead minnows were exposed to 3 and 10 ppb sertraline for 7 days. Real-time Polymerase Chain Reaction was used to detect the change in gene expression of the Follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Results showed that a down regulation at the 10 ppb was evident on the LH and to a lesser extent on FSH. Our results …
Date:
May 2013
Creator:
Mohamed, Hagar Abdo
System:
The UNT Digital Library
Examination of the Relationship Between Glucuronic Acid and Vascular Damage in Rats
The goal of this experiment was to examine the role of glucuronic acid in the development of vascular damage in the kidneys and retinas of diabetic individuals. Glucuronic acid was provided to rats in their water at various concentrations in order to increase plasma levels of the compound. Kidneys and retinas were excised and compared to control specimens using microscopy to determine the effect of elevated blood glucuronic acid levels on the occurrence of microaneurysms in renal capillary networks. No differences were seen between the treatment and control groups. Further study needs to be conducted to determine a more suitable time frame for this experiment.
Date:
May 2013
Creator:
Moore, Ryan
System:
The UNT Digital Library
Don Gillis's Symphony No 5½: Music for the People
Don Gillis wrote Symphony No. 5½ (1947) in order to reconcile the American public with modern art music. By synthesizing jazz (as well as other American folk idioms), singable melodies, and humor, and then couching them into symphonic language, Gillis produced a work that lay listeners could process and enjoy. The piece was an immediate success and was played by orchestras across the globe, but it did not retain this popularity and it eventually faded from relevancy. This study focuses on elements that contributed to the initial efficacy and ultimate decline of the work. Due to its pervasive popular influences, Symphony No. 5½ is a crystallized representation of time in which it was written, and it soon became dated. Don Gillis did not harbor the idea that Symphony No. 5½ would grant him great wealth or musical immortality; he had a more pragmatic goal in mind. He used every musical element at his disposal to write a symphonic work that would communicate directly with the American people via a musical language they would understand. He was successful in this regard, but the dialogue ended soon after mid-century.
Date:
May 2013
Creator:
Morrison, Sean
System:
The UNT Digital Library
Interspecimen Study of Bone to Relate Macromechanical, Nanomechanical and Compositional Changes Across the Femoral Cortex of Bone
Mechanics of bone is widely studied and researched, mainly for the study of fracture. This has been done mostly on a macro scale. In this work hierarchical nature of bone has been explored to investigate bone mechanics in more detail. Flexural test were done to classify the bones according to their strength and deflection. Raman spectroscopy analysis was done to map the mineralization, collagen crosslinking changes across the thickness of the bone. Nanoindentation was done to map indentation hardness and indentation modulus across femoral cortex of the bone. The results indicate that the composition of the bone changes across the thickness of the femoral cortex. The hypothesis is confirmed as increase in mineralization, carbonate to phosphate ratio and collagen crosslinking shows the effect as increased indentation hardness and modulus and decreased deflection.
Date:
May 2013
Creator:
Nar, Mangesh
System:
The UNT Digital Library
Using a Multimodal Sensing Approach to Characterize Human Responses to Affective and Deceptive States
Different ways to measure human affective and deceptive reactions to stimulus have been developed. One method is a multimodal approach using web camera, thermal imaging camera and physiological sensors data to extract different features in the human face (verbal and non-verbal behavior) such as breathing rate, heart rate, face temperature, skin conductance, eye tracking, language analysis and facial expressions among others. Human subjects from different ages and ethnicity were exposed to two different experiments were they watched videos (affection recognition) and others answered an interview session (deception recognition). With the data collected from videos (thermal and visual), different regions of interest (ROI) of the face were selected as well as the whole picture. The ROI were determined based on the most sensitive parts of the face where larger changes of temperature or other physiological features are recorded. It was also analyzed the language (written and spoken) in order to obtain the verbal modalities. The data has been compared among the subjects to determine whether the deceptive and affective reactions of a person can be predicted using multimodal approach. From the multiple data obtained, a characterization of reactions is proposed when subjects are exposed to different stimulus, positive or negative, as …
Date:
May 2013
Creator:
Narvaez-Valle, Alexis
System:
The UNT Digital Library
Convergent Validity of Variables Residualized By a Single Covariate: the Role of Correlated Error in Populations and Samples
This study examined the bias and precision of four residualized variable validity estimates (C0, C1, C2, C3) across a number of study conditions. Validity estimates that considered measurement error, correlations among error scores, and correlations between error scores and true scores (C3) performed the best, yielding no estimates that were practically significantly different than their respective population parameters, across study conditions. Validity estimates that considered measurement error and correlations among error scores (C2) did a good job in yielding unbiased, valid, and precise results. Only in a select number of study conditions were C2 estimates unable to be computed or produced results that had sufficient variance to affect interpretation of results. Validity estimates based on observed scores (C0) fared well in producing valid, precise, and unbiased results. Validity estimates based on observed scores that were only corrected for measurement error (C1) performed the worst. Not only did they not reliably produce estimates even when the level of modeled correlated error was low, C1 produced values higher than the theoretical limit of 1.0 across a number of study conditions. Estimates based on C1 also produced the greatest number of conditions that were practically significantly different than their population parameters.
Date:
May 2013
Creator:
Nimon, Kim
System:
The UNT Digital Library
Down, Set, Like? A Study of Social Networking and Sports Fandom
Sports in the 21st century have become popular across multiple industries, and a major boon to a television industry dealing with increasing audience fragmentation. So an understanding of fans' behavior is important to all parties. This study, an online survey consisting of 242 responses, examined fandom and its relationship with time spent using social networking sites and found no statistical correlation. Six uses and gratification factors obtained: human connection, network content, distraction/amusement, social integration, social surveillance, and active entertainment. The low comparative saliency of the social integration factor suggests that perhaps fandom is distinct from other ways of identifying with similarly-minded individuals (e.g. political and/or religious affiliation), or that perhaps fandom as a factor is less than sufficient to explain how/why sports fans use social networking sites.
Date:
May 2013
Creator:
Otteson, Gabe
System:
The UNT Digital Library