You limited your search to:

  Access Rights: Public
  Partner: UNT Libraries
 Language: English
 Collection: UNT Theses and Dissertations
Analysis of Biological Materials Using a Nuclear Microprobe

Analysis of Biological Materials Using a Nuclear Microprobe

Date: December 2014
Creator: Mulware, Stephen Juma
Description: The use of nuclear microprobe techniques including: Particle induced x-ray emission (PIXE) and Rutherford backscattering spectrometry (RBS) for elemental analysis and quantitative elemental imaging of biological samples is especially useful in biological and biomedical research because of its high sensitivity for physiologically important trace elements or toxic heavy metals. The nuclear microprobe of the Ion Beam Modification and Analysis Laboratory (IBMAL) has been used to study the enhancement in metal uptake of two different plants. The roots of corn (Zea mays) have been analyzed to study the enhancement of iron uptake by adding Fe (II) or Fe (III) of different concentrations to the germinating medium of the seeds. The Fe uptake enhancement effect produced by lacing the germinating medium with carbon nanotubes has also been investigated. The aim of this investigation is to ensure not only high crop yield but also Fe-rich food products especially from calcareous soil which covers 30% of world’s agricultural land. The result will help reduce iron deficiency anemia, which has been identified as the leading nutritional disorder especially in developing countries by the World Health Organization. For the second plant, Mexican marigold (Tagetes erecta), the effect of an arbuscular mycorrhizal fungi (Glomus intraradices) for the ...
Contributing Partner: UNT Libraries
Analysis of Texas Education Agency Commissioner of Education Decisions Regarding Superintendent, Associate Superintendent, School Administrator, Athletic Director and Central Office Administrator Term Contract Nonrenewal Appeals From 1983 to 2013

Analysis of Texas Education Agency Commissioner of Education Decisions Regarding Superintendent, Associate Superintendent, School Administrator, Athletic Director and Central Office Administrator Term Contract Nonrenewal Appeals From 1983 to 2013

Date: December 2014
Creator: Ramirez, Carlos
Description: I conducted a legal analysis of decisions by Texas Commissioners of Education in appeals by Texas school administrators from nonrenewal decisions made by Texas school districts from 1983 to 2013. I analyzed the findings of fact and conclusions of law described in the commissioners’ rulings to determine the legal basis of school districts’ decisions to nonrenew school administrators’ term employment contracts. I also examined the legal rationale for commissioners’ rulings and determined which party most commonly prevailed in these administrative proceedings—the respondent school district or the petitioner school administrator. In particular, the study determined factors that contributed to commissioners’ decisions to overrule or support school districts’ nonrenewal decisions. A careful review of commissioner decisions, which are accessible on the Texas Education Association website, identified 44 commissioner decisions involving appeals by superintendents, associate superintendents, public school administrators, athletic directors, or central office administrators concerning school districts’ term contract nonrenewal decisions from 1983 to 2013. Commissioners’ decisions in these cases were surveyed using legal research methods. This study provides recommendations to assist local education agencies to refine current policies and regulations regarding the nonrenewal of administrators’ term contracts, and provides insight on Texas Commissioners’ rulings on term contract nonrenewal appeals brought by ...
Contributing Partner: UNT Libraries
Analytical Model for Lateral Deflection in Cold-formed Steel Framed Shear Walls with Steel Sheathing

Analytical Model for Lateral Deflection in Cold-formed Steel Framed Shear Walls with Steel Sheathing

Date: December 2014
Creator: Yousof, Mohamad
Description: An analytical model for lateral deflection in cold-formed steel shear walls sheathed with steel is developed in this research. The model is based on the four factors: fastener displacement, steel sheet deformation, and hold-down deformation, which are from the effective strip concept and a complexity factor, which accounts for the additional influential factors not considered in the previous three terms. The model uses design equations based on the actual material and mechanical properties of the shear wall. Furthermore, the model accounts for aggressive and conservative designers by predicting deflection at different shear strength degrees.
Contributing Partner: UNT Libraries
The Application of Common-practice Elements in Modern Music: Examining Examples of Musical Continuity in Selected Piano Works of James R Wintle

The Application of Common-practice Elements in Modern Music: Examining Examples of Musical Continuity in Selected Piano Works of James R Wintle

Date: December 2014
Creator: Kim, Sung-Yun
Description: The purpose of this dissertation is to analyze the ways in which distinguished American composer James RayWintle (1942-2013) addresses the problem of formal unity and incorporates previous musical styles in his post-tonal compositions. Because post-tonal music lacks many of the pillars that create tonal structure, it can be difficult for a composer to maintain a sense of form when writing in this style. Wintle attempts to circumvent this issue by incorporating common-practice elements, such as formal sections, familiar stylistic gestures, and referential-pitch organization into his works. For this analysis, the author has selected three of Wintle’s piano compositions that best represent his compositional approach and diverse techniques: Album Leaves - A Set of Five Character Pieces for Piano (2001), Scherzino (Street Scenes of Ovada) for Solo Piano (2010), and Four Miniatures for Piano Four Hands (2003). Wintle’s artistic style borrows extensively from Western classical music, encompassing various historical periods and quoting several major composers. Additionally, he incorporates a variety of musical styles into his chamber works and those for solo piano. These range from the dance suites of the French Baroque and Brahmsian-character pieces to American ragtime. This research also describes Wintle’s compositional style and his borrowing of 18th- and ...
Contributing Partner: UNT Libraries
An Assessment of a Hospice and Palliative Care Partnership Program

An Assessment of a Hospice and Palliative Care Partnership Program

Date: December 2014
Creator: Munene, Grace N
Description: This project attempts to describe how a hospice and palliative care partnership program works. Through the assessment of one such program, the researcher sought to find out the essential components of the partnership including how the two partner organizations interact and work together. Data was collected using various methods: document review of organization documents such as newsletters, annual or quarterly reports, brochures and other available literature e.g. materials on organizations’ website and on social media; in-depth interviews with stakeholders of both organizations that included staff and board members; observation of staff working; and participant observation during organization events. The findings of the research shows that in order for organizations to have an effective partnership program in place, both partners need to have strong leadership in place, possess a willingness to learn from each other, maintain regular communication, and visit each other regularly. With this in place, several outcomes of the program are likely such as: increasing advocacy for hospice and palliative care, increasing visibility of the organizations both nationally and internationally, and provides an opportunity for organizations to network with other organizations in their locality in order to achieve partnership objectives. The study further reveals that global collaborations in the ...
Contributing Partner: UNT Libraries
The Behavioral Economics of Effort

The Behavioral Economics of Effort

Date: December 2014
Creator: Nord, Christina M
Description: Although response effort is considered a dimension of the cost to obtain reinforcement, little research has examined the economic impact of effort on demand for food. The goal of the present study was to explore the relationship between effort and demand. Three Sprague Dawley rats were trained to press a force transducer under a series of fixed-ratio schedules (1, 10, 18, 32, 56, 100, 180, 320, and 560) under different force requirements (5.6 g and 56 g). Thus, nominal unit price (responses / food) remained constant while minimal response force requirements varied. Using a force transducer allowed the measurement of responses failing to meet the minimal force requirement (i.e. “subcriterion responses”), an advantage over prior approaches using weighted levers to manipulate effort. Consistent with prior research, increasing the unit price decreased food consumption, and raising minimum force requirements further reduced demand for food. Additionally, increasing the force requirement produced subcriterion responses. Analysis indicated that subcriterion responses did not create incidental changes in unit price. Obtained force data revealed that including obtained forces in unit price calculations provided better predictions of consumption when compared to using criterion force requirements.
Contributing Partner: UNT Libraries
Béla Bartók’s Editorial Input As Seen in His Edition of Piano Sonata Hobxvi:49 in E Flat Major by Joseph Haydn

Béla Bartók’s Editorial Input As Seen in His Edition of Piano Sonata Hobxvi:49 in E Flat Major by Joseph Haydn

Date: December 2014
Creator: Cho, So Young
Description: Béla Bartók (1881-1945), one of the twentieth century’s most significant composers, is also well known as an ethnomusicologist and concert pianist. However, Bartók’s work as a pedagogue and as an editor has received relatively little scholarly attention, despite famous pupils and despite his preparation of numerous critical and educational editions of his own and others’ works. While the critical editions are few, a significant number of Bartók’s editions of piano works have an educational purpose; these editions contain highly detailed performing indications and hold substantial potential for investigating Bartók’s ideas on the performance of works by other composers. Bartók edited nineteen piano sonatas by Haydn for educational purposes between 1911 and 1920. Bartók’s edition of Haydn’s Piano Sonata Hob.XVI:49 in E-flat Major is compared with both the first edition and the facsimile of the manuscript, with a focus on articulation, pedaling, dynamics, fingering, and other significant markings such as indications of expression and ornamentations. This document examines Bartók’s editorial input in this edition as an exemplar of his stylistic principles, and explores the value of Bartók’s Haydn editions as performing editions by critically examining both his editorial contributions and possible execution issues. This study thus provides an understanding of Bartók’s ...
Contributing Partner: UNT Libraries
Breaking the Doubler Barrier: Using Sy Brandon’sDivertissement to Demonstrate a Practical Approach to Performing Multiple WoodwindWorks

Breaking the Doubler Barrier: Using Sy Brandon’sDivertissement to Demonstrate a Practical Approach to Performing Multiple WoodwindWorks

Date: December 2014
Creator: Levels, Brian Eugene
Description: Multiple woodwind training is ideal for securing certain types of employment; however, with so many different instruments, performance standards on each are difficult to maintain. Furthermore, for many multiple woodwind players, proficiency on all woodwinds ceases to be a top priority after graduation, even though they continue to market themselves as highly proficient on all of these instruments. The problem for most begins with what it means to be proficient on each instrument. The technical demands of multiple woodwind performance vary widely, but often a performance calls for complete proficiency on a variety of instruments. Multiple woodwind players who lack in professional level proficiency damage the credibility of the field and jeopardize employment opportunities for others. This study aims to address the common problems involving proficiency and to help multiple woodwind players, band directors, and doublers become familiar with and overcome these common pitfalls. Sy Brandon’s Divertissement provides an outstanding platform to address problems and provide solutions for multiple wind players, band directors, and doublers. This dissertation serves as a multiple woodwind specialist’s resource for maximum efficiency in learning and playing repertoire that involves multiple woodwinds, such as musicals, and other multiple woodwind genres.
Contributing Partner: UNT Libraries
Caring for Cancer: Understanding the Access and Perceptions of Psychosocial Cancer Services in North Texas

Caring for Cancer: Understanding the Access and Perceptions of Psychosocial Cancer Services in North Texas

Date: December 2014
Creator: Quirk, Lisa E.
Description: It is estimated that nearly 14.5 million Americans are living with cancer today. A commonly overlooked component to quality cancer care, as defined by the Institute of Medicine, is the role of psychological and social support. Better known as psychosocial support, these needs reflect a broad spectrum of obstacles or assets in an individual’s personal life that may help or hinder their healing experience. Some psychosocial examples include coping skills, transportation to medical appointments, or appropriate knowledge to mitigate the physical impacts of the cancer process. Research has shown that by addressing these potential needs, a better health outcome may be achieved for cancer patients. Through participant observation at local psychosocial service establishments and through semi-structured interviews with service providers and adults diagnosed with cancer living in the Dallas-Fort Worth region, this thesis research seeks to explore how local cancer patients are learning of psychosocial services available to them, what barriers may exist in accessing these services, and what individuals may be doing to address their psychosocial needs, both formally or informally. Results yielded recommendations for local psychosocial providers to adjust their marketing of services and kinds of services offered as well as yielded recommendations for future academic research.
Contributing Partner: UNT Libraries
Characterization of Ionic Liquid Solvents Using a Temperature Independent, Ion-specific Abraham Parameter Model

Characterization of Ionic Liquid Solvents Using a Temperature Independent, Ion-specific Abraham Parameter Model

Date: December 2014
Creator: Stephens, Timothy W.
Description: Experimental data for the logarithm of the gas-to-ionic liquid partition coefficient (log K) have been compiled from the published literature for over 40 ionic liquids over a wide temperature range. Temperature independent correlations based on the Gibbs free energy equation utilizing known Abraham solvation model parameters have been derived for the prediction of log K for 12 ionic liquids to within a standard deviation of 0.114 log units over a temperature range of over 60 K. Temperature independent log K correlations have also been derived from correlations of molar enthalpies of solvation and molar entropies of solvation, each within standard deviations of 4.044 kJ mol-1 and 5.338 J mol-1 K-1, respectively. In addition, molar enthalpies of solvation and molar entropies of solvation can be predicted from the Abraham coefficients in the temperature independent log K correlations to within similar standard deviations. Temperature independent, ion specific coefficients have been determined for 26 cations and 15 anions for the prediction of log K over a temperature range of at least 60 K to within a standard deviation of 0.159 log units.
Contributing Partner: UNT Libraries
FIRST PREV 1 2 3 4 5 NEXT LAST