Degree Level

477 Matching Results

Results open in a new window/tab.

Doctoral Recital: 2015-04-19 – Mia Detwiler, violin

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: April 19, 2015
Creator: Detwiler, Mia
Object Type: Sound
System: The UNT Digital Library
Nonlinear and Quantum Optics Near Nanoparticles (open access)

Nonlinear and Quantum Optics Near Nanoparticles

We study the behavior of electric fields in and around dielectric and metal nanoparticles, and prepare the ground for their applications to a variety of systems viz. photovoltaics, imaging and detection techniques, and molecular spectroscopy. We exploit the property of nanoparticles being able to focus the radiation field into small regions and study some of the interesting nonlinear, and quantum coherence and interference phenomena near them. The traditional approach to study the nonlinear light-matter interactions involves the use of the slowly varying amplitude approximation (SVAA) as it simplifies the theoretical analysis. However, SVVA cannot be used for systems which are of the order of the wavelength of the light. We use the exact solutions of the Maxwell's equations to obtain the fields created due to metal and dielectric nanoparticles, and study nonlinear and quantum optical phenomena near these nanoparticles. We begin with the theoretical description of the electromagnetic fields created due to the nonlinear wavemixing process, namely, second-order nonlinearity in an nonlinear sphere. The phase-matching condition has been revisited in such particles and we found that it is not satisfied in the sphere. We have suggested a way to obtain optimal conditions for any type and size of material medium. …
Date: December 2015
Creator: Dhayal, Suman
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Synthesis and Characterization of Ion Beam Assisted Silver Nanosystems in Silicon Based Materials for Enhanced Photocurrent Collection Efficiency (open access)

Synthesis and Characterization of Ion Beam Assisted Silver Nanosystems in Silicon Based Materials for Enhanced Photocurrent Collection Efficiency

In recent years a great deal of interest has been focused on the synthesis of transitional metal (e.g. Ag, Cu, Fe, Au) nanosystems at the surface to sub-surface regions of Si and SiO2 matrices for fundamental understanding of their structures as well as for development of technological applications with enhanced electronic and optical properties. The applications of the metal nanoparticle or nanocluster (NC) systems range from plasmonics, photovoltaic devices, medical, and biosensors. In all of these applications; the size, shape and distribution of the metallic NCs in the silicon matrix play a key role. Low energy ion implantation followed by thermal annealing (in vacuum or gas environment) is one of the most suitable methods for synthesis of NCs at near surfaces to buried layers below the surfaces of the substrates. This technique can provide control over depth and concentration of the implanted ions in the host matrix. The implanted low energy metal ions initially amorphizes the Si substrates while being distributed at a shallow depth near the substrate surface. When subject to thermal annealing, the implanted ions agglomerate to form clusters of different sizes at different depths depending upon the fluence. However, for the heavier ions implanted with high fluences …
Date: May 2015
Creator: Dhoubhadel, Mangal S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
First Movement of the Beethoven Third Piano Concerto: An Argument for the Alkan Cadenza (open access)

First Movement of the Beethoven Third Piano Concerto: An Argument for the Alkan Cadenza

The goal of this dissertation is not only to introduce the unique cadenza by Alkan but also to offer an argument from the performer’s point of view, for why Alkan’s cadenza should be considered when there exists a cadenza by Beethoven himself, not to mention those by a number of other composers, both contemporaries of Beethoven and later. Information in reference to the brief history of the cadenza and the pianoforte in the time of Mozart and Beethoven is presented in Chapter 2. A brief bibliography about Alkan is presented in Chapter 3. Chapter 4 describes not only the cadenza in the era of Alkan, but also a comparison which is presented between Beethoven and Alkan's cadenzas. Examples of the keyboard range, dynamic contrast, use of pedal and alternating notes or octaves, and creative quote are presented in Chapter 4. In conclusion, the revival of Alkan's cadenza is mentioned, and the author's hope to promote the Alkan's cadenza is presented in Chapter 5.
Date: May 2015
Creator: Ding, Yang
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Doctoral Recital: 2015-05-20 - Ha Na Do, piano

Recital presented at the UNT College of Music Voertman Hall.
Date: May 20, 2015
Creator: Do, Ha Na
Object Type: Sound
System: The UNT Digital Library
A Seventeenth-century Musiklehrbuch in Context: Heinrich Baryphonus and Heinrich Grimm’s Pleiades Musicae (open access)

A Seventeenth-century Musiklehrbuch in Context: Heinrich Baryphonus and Heinrich Grimm’s Pleiades Musicae

Heinrich Baryphonus (1581-1655) and Heinrich Grimm’s (1592/3-1637) didactic treatise, Pleiades musicae (1615/1630), provides a vivid testimony to the state of music education and music theory pedagogy in Protestant Germany in the early seventeenth century. Published initially by Baryphonus for use at the Gymnasium in Quedlinburg and reissued in an expanded format by Grimm for use at the Gymnasium in Magdeburg, the text examines the fundamentals of pitch, intervals, counterpoint, and, in the second edition, triadic theory and composition. Throughout the remainder of the seventeenth century and into the eighteenth century, music theorists including Johann Andreas Herbst (1588-1666), Otto Gibel (1612-1682), and Andreas Werckmeister (1645-1706), used the document as a source for their own musical writings, solidifying its status as a significant contribution to the field of music theory. Recently, scholars such as Carl Dahlhaus, Benito Rivera, and Joel Lester have found value in Pleiades musicae for its role in the early stages of the development of triadic theory and the emergence of harmonic tonality. However, with the exception of the passages on triadic theory, the treatise continues to be relatively unknown. In order to understand the full extent of Baryphonus and Grimm’s contributions to the history of music theory, and …
Date: August 2015
Creator: Dobbs, Benjamin M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Intuitive Eating in Adolescents: Testing a Psychosocial Model (open access)

Intuitive Eating in Adolescents: Testing a Psychosocial Model

Intuitive eating is defined as an adaptive eating process that involves focusing on internal hunger and satiety to guide eating behavior, using those physiological cues rather than emotions to determine when to eat, and choosing what to eat based upon preference and not external rules and expectations. The purpose of this study was to examine intuitive eating within the context of contemporary sociocultural models of eating in 701 early adolescent boys and 769 early adolescent girls. Support was found for the model and suggested that pressures to lose weight or gain muscle, restrictive messages about food from caregivers, and internalization of the thin ideal were related to the early adolescents’ intuitive eating behaviors, suggesting that many of the sociocultural variables that have been found to impact disordered eating are salient for understanding healthy eating behaviors. However, the relations among many of the variables, as well as the model’s ability to explain intuitive eating overall, were stronger in girls than in boys. These findings can be used to help parents and schools begin to teach early adolescents about intuitive eating and how they can resist external pressures that may negatively influence their eating behaviors.
Date: August 2015
Creator: Dockendorff, Sally A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Doctoral Recital: 2015-10-09 – Mark Douglass, percussion

Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: October 9, 2015
Creator: Douglass, Mark
Object Type: Sound
System: The UNT Digital Library
Dynamics of Stream Fish Metacommunities in Response to Drought and Re-connectivity (open access)

Dynamics of Stream Fish Metacommunities in Response to Drought and Re-connectivity

This dissertation investigates the spatio-temporal dynamics of intermittent stream fish metacommunities in response drought-induced fragmentation and re-connectivity using both field and experimental approaches. A detailed field study was conducted in two streams and included pre-drought, drought, and post-drought hydrological periods. Fish assemblages and metacommunity structure responded strongly to changes in hydrological conditions with dramatic declines in species richness and abundance during prolonged drought. Return of stream flows resulted in a trend toward recovery but ultimately assemblages failed to fully recover. Differential mortality, dispersal, recruitment among species indicates species specific responses to hydrologic fragmentation, connectivity, and habitat refugia. Two manipulative experiments tested the effects of drought conditions on realistic fish assemblages. Fishes responded strongly to drought conditions in which deeper pools acted as refugia, harboring greater numbers of fish. Variability in assemblage structure and movement patterns among stream pools indicated species specific habitat preferences in response predation, resource competition, and desiccation. Connecting stream flows mediated the impacts of drought conditions and metacommunity dynamics in both experiments. Results from field and experimental studies indicate that stream fish metacommunities are influenced by changes in hydrological conditions and that the timing, duration, and magnitude of drought-induced fragmentation and reconnecting stream flows have important consequences …
Date: August 2015
Creator: Driver, Lucas J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Montesquieu, Diversity, and the American Constitutional Debate (open access)

Montesquieu, Diversity, and the American Constitutional Debate

It has become something of a cliché for contemporary scholars to assert that Madison turned Montesquieu on his head and thereafter give little thought to the Frenchman’s theory that republics must remain limited in territorial size. Madison did indeed present a formidable challenge to Montesquieu’s theory, but I will demonstrate in this dissertation that the authors of the Federalist Papers arrived at the extended sphere by following a theoretical pathway already cemented by the French philosopher. I will also show that Madison’s “practical sphere” ultimately concedes to Montesquieu that excessive territorial size and high levels of heterogeneity will overwhelm the citizens of a republic and enable the few to oppress the many. The importance of this dissertation is its finding that the principal mechanism devised by the Federalists for dealing with factions—the enlargement of the sphere—was crafted specifically for the purpose of moderating interests, classes, and sects within an otherwise relatively homogeneous nation. Consequently, the diverse republic that is America today may be exposed to the existential threat anticipated by Montesquieu’s theory of size—the plutocratic oppression of society by an elite class that employs the strategy of divide et impera.
Date: December 2015
Creator: Drummond, Nicholas W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Effect of Acute Alcohol Ingestion on Resistance Exercise Induced mTORC1 Signaling in Human Muscle (open access)

Effect of Acute Alcohol Ingestion on Resistance Exercise Induced mTORC1 Signaling in Human Muscle

The purpose of this project was to further elucidate the effects post-exercise alcohol ingestion. This project had many novel aspects including using a resistance exercise (RE) only exercise design and the inclusion of women. To our knowledge, we are the first to investigate the effect of post-RE alcohol ingestion in women. In the first chapter of this project, information on the prevalence of alcohol use and the importance of skeletal muscle as a dynamic and metabolic tissue was provided. In chapter two, the effects of post-RE alcohol ingestion in men and women are detailed. The major findings of this study was that although RE elicited similar mTORC1 signaling both in men and in women, alcohol ingestion appeared to only attenuate RE-induced phosphorylation of the mTORC1 signaling pathway in men. The third chapter focused on examining the effects of post-RE alcohol ingestion on acute testosterone bioavailability. The primary findings of this study was that alcohol substantially elevated serum total and free testosterone concentrations during recovery from a bout of resistance exercise. The fourth chapter detailed factors that contribute to bone density in men. The major findings of this study was that young adult male long-distance runners who participated in resistance training …
Date: August 2015
Creator: Duplanty, Anthony A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Impact of a Genetically Engineered Probiotic Therapy and IGF-1 Genomics in the PAHenu2 Mouse Model of PKU (open access)

Impact of a Genetically Engineered Probiotic Therapy and IGF-1 Genomics in the PAHenu2 Mouse Model of PKU

Absence of functional phenylalanine hydroxylase results in phenylketonuria (PKU). Viable treatments remain few, expensive and secondary conditions such as osteopenia occur in most PKU patients. Objective 1: Given the recently described roles of gut microbes to aid host digestion, an orally administered genetically engineered probiotic as the delivery vehicle for enzyme replacement therapy was created. The engineered probiotic, pHENOMMenal, produced phenylalanine ammonia lyase with significant production of trans-cinnamate (phenylalanine cleavage product) in vitro and resulted in a reduction of 515 μM in blood phenylalanine when fed to PKU animals for 14 days (from 2307µM ± 264µM to 1792µM ± 261µM, n = 6, P < 0.05). The control probiotic produced no change in blood phenylalanine. Thus, pHENOMMenal treatment in PKU mice demonstrated engineered microbes could compensate for a metabolic deficiency of the host. Objective 2: Evaluate the PAHenu2 mouse model of PKU for a genetic discrepancy causing ocular enlargement and delayed development observed only after the PAHenu2 mutation was crossed to the C57BL/6J mouse. When compared to healthy littermates, ELISA indicated a consistent but insignificant decrease in plasma IGF-1 and an increase in ocular IGF-1 in PKU animals. SNP screening demonstrated a differential inheritance of IGF-1 alleles in healthy and …
Date: December 2015
Creator: Durrer, Katherine Elaine
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Cross-culture Choral Music Education: Issues for Western Choral Conductors Related to the Performance of Arabic Choral Music (open access)

Cross-culture Choral Music Education: Issues for Western Choral Conductors Related to the Performance of Arabic Choral Music

The concept of choral music as defined by the Western world was foreign to Arab cultures until the colonization of the Arab world began in the seventeenth century when we began to see the Western choral style emerging in the churches of the Arab world. Group singing of traditional music was done in unison or heterophonic textures. Notated part-singing is a product of colonization, Westernization, Christianization, and now globalization. In recent years, singing music in mixed or multiple voicings not of a heterophonic nature has spread beyond the churches to the secular Arab world. As choral singing has increased in the Arab world, a new genre of Arabic choral music has emerged. In order for Western conductors to effectively teach, conduct, or perform these new works, it is important for them to develop a basic understanding of traditional Arabic musical styles and pronunciation of the language, thereby making Arabic choral music more accessible and enabling it to become a part of the larger world’s musical vocabulary. This study serves as an introductory resource for non-Arab choral conductors concerning key elements related to performing Arabic choral music and provides a context for how these elements relate to this evolving choral genre. …
Date: August 2015
Creator: Earnhart, Cari L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Doctoral Recital: 2015-09-18 – Dave Ekstrum, tenor

Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: September 18, 2015
Creator: Ekstrum, Dave
Object Type: Sound
System: The UNT Digital Library

Doctoral Recital: 2015-09-18 – Dave Ekstrum, tenor

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: September 18, 2015
Creator: Ekstrum, Dave
Object Type: Video
System: The UNT Digital Library

Doctoral Recital - 2015-05-01- Julianna Emanski, soprano

Recital presented at the UNT College of Music Voertman Hall.
Date: May 1, 2015
Creator: Emanski, Julianna
Object Type: Sound
System: The UNT Digital Library

Doctoral Recital: 2015-05-01 – Julianna Emanski, soprano

Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: May 1, 2015
Creator: Emanski, Julianna
Object Type: Video
System: The UNT Digital Library
A Canonical Correlational Analysis Exploring Characteristics of Children Presenting to Counseling for Grief and Loss (open access)

A Canonical Correlational Analysis Exploring Characteristics of Children Presenting to Counseling for Grief and Loss

To date, researchers who have explored the complexity of childhood bereavement have utilized unstandardized assessment instruments and/or have independently evaluated specific constructs rather than factoring in the dimensionality of loss. The purpose of this study was to use parents' completion of established instruments--the Child Behavior Checklist and the Parenting Stress Index--to examine the multivariate shared relationship between characteristics of bereaved children referred for counseling--their ages, genders, ethnicities, types of loss, and life stressors--and their behavioral manifestations as well as the relationship between these characteristics and levels of parent-child relational stress. Utilizing archival clinical files, I examined these characteristics from bereaved children (N = 98) whose parents sought counseling services from two university-based counseling clinics. The sample consisted of 67 boys and 31 girls between the ages 3 and 11 years old (M = 6.28). The majority of participants (67%, n = 66) identified as Caucasian, 10% (n = 10) as African American, 10% (n = 10) as Hispanic/Latino, 6% as Bi-racial (n = 6), 4% as Native American (n = 4), and 2% as Asian (n = 2). A canonical correlational analyses (CCA) was conducted to examine relationship between characteristics of children and their subsequent behavioral manifestations. The full model …
Date: August 2015
Creator: Ener, Liz D.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Megachurches and Economic Development: A Theoretical Understanding of Church Involvement at the Local Level (open access)

Megachurches and Economic Development: A Theoretical Understanding of Church Involvement at the Local Level

Why do megachurches participate in economic development, and who benefits from their participation? Frumkin's framework for understanding nonprofit and voluntary action and extra-role behavior are theories tested to answer these questions. My research employs a mixed-methods research design conducted in two phases. In phase one, I analyze 42 responses to an online survey to provide data about the prevalence and nature of economic development activities offered by megachurches in the Dallas-Fort Worth and Houston-Sugar Land-Baytown Metropolitan Statistical Areas. Phase two involved 23 semi-structured telephone interviews with megachurch leadership to provide data that explains the rationale for why megachurches offer economic development activities and who benefits. Evidence from this research demonstrates that megachurches are participating in economic development for reasons consistent with both demand-side and supply-side arguments. Findings also show that megachurches take on extra-role behaviors for in response to community expectations and the values of members and staff. Implications for understanding partnership decisions and collaborations between faith-based organizations and local governments are discussed.
Date: December 2015
Creator: English, Ashley E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Form in Popular Song, 1990-2009 (open access)

Form in Popular Song, 1990-2009

Through an examination of 402 songs that charted in the top 20 of the Billboard year-end charts between the years 1990 and 2009, this dissertation builds upon previous research in form of popular song by addressing the following questions: 1) How might formal sections be identified through melody, harmony, rhythm, instrumentation, and text? 2) How do these sections function and relate to one another and to the song as a whole? 3) How do these sections, and the resulting formal structures, relate to what has been described by previous theorists as normative? 4) What new norms and trends can be observed in popular song forms since 1990? Although many popular songs since 1990 do follow well-established forms, some songwriters and producers change and vary these forms. AAA strophic form, AABA form, Verse-Chorus form, Verse-Chorus with Prechorus and/or Postchorus sections, Verse-Chorus-Bridge form, “Other, with a Chorus” and “Other, without a Chorus” forms are addressed. An increasing number of the songs in each of the above listed forms are based on a repeating harmonic progression or no harmonic progression at all. In such songs, the traditional method of identifying sections and section-functions through harmonic analysis is less useful as an analytical tool, …
Date: December 2015
Creator: Ensign, Jeffrey S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
On City Identity and Its Moral Dimensions (open access)

On City Identity and Its Moral Dimensions

The majority of people on Earth now live in cities, and estimates hold that 60 percent of the world’s cities have yet to be built. Now is the time for philosophers to develop a philosophy of the city to address the forthcoming issues that urbanization will bring. In this dissertation, I respond to this need for a philosophy of the city by developing a theory of city identity, developing some of the theory’s normative implications, illustrating the theory with a case study, and outlining the nature and future of philosophy of the city more generally. Indeed, this dissertation is only a part of my larger project of founding and institutionalizing this new field of both academic and socially-engaged philosophical activity. Throughout the history of the discipline, other areas such a personal identity have received numerous considerations, along with the concept of identity as an abstraction. For example, there is a bounty of research addressing problems pertaining to how objects and people retain an identity over time and claims about identity in general. While one could argue that cities are not any different than any other object, such an account fails to consider that a city’s dynamic nature makes it dissimilar …
Date: December 2015
Creator: Epting, Shane Ray
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Alternative Certification Teaching Programs in Texas: A Historical Analysis (open access)

Alternative Certification Teaching Programs in Texas: A Historical Analysis

Before 1984, nearly 975 of teachers entered the teaching profession after graduating from a traditional university-based program. However, beginning in the mid-1980s, alternative routes leading to teacher certification began to emerge in the United States. As of 2010, nearly one-third of all new teachers graduated from an alternative preparation program. As alternative certification (AC) routes approach 30 years since establishment, programs continue to evolve and increase in enrollment. This study focused on the changes that have come about in the maturation of alternative certification programs in Texas since legislation was passed in 1985. The purpose of the study was to delineate the evolution of AC programs using a historical approach, the study used both primary and secondary resources as research tools and employed the use of eight interviews and the literature review for the collection of data. The prediction of future teacher shortages, the need for diversity in the profession the political view to privatize education, and economic recessions were all motivating factors for establishing alternative teacher programs. In the beginning, graduation from AC programs were perceived as not authentic teachers and not as prepared for teaching as graduates from traditional programs. AC programs have become a legitimate and viable …
Date: May 2015
Creator: Etheredge, David K.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Parenting Style, Frequency of Electronic Communication with Parents, and the Development of Independence in First Year, First Semester College Students (open access)

Parenting Style, Frequency of Electronic Communication with Parents, and the Development of Independence in First Year, First Semester College Students

During the transition to college, emerging adults are expected to develop independence and increase individual responsibility as they live away from home for the first time. Modern electronic communication has enabled emerging adults to maintain frequent, daily contact with the parent, a pattern of communication Hofer refers to as an “electronic tether.” This study examined the link between parenting style and the development of independence of first year, first semester college students. Although these students were in frequent contact with their designated parent, no correlation between frequency of communication and parenting style or independence was found. Both authoritative and helicopter parenting significantly positively predicted attitudinal independence. However, permissive parenting functioned as a significant negative predictor. Authoritarian, permissive, and helicopter parenting significantly positively predicted conflictual independence. However, authoritative parenting functioned as a significant negative predictor. Both authoritative and helicopter parenting significantly positively predicted emotional and functional independence.
Date: August 2015
Creator: Etheridge, Lauri McAfee
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Doctoral Recital: 2015-03-02 - Gabe Evens, piano, jazz arranging, and composition

Recital presented at the UNT College of Music Kenton Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date: March 2, 2015
Creator: Evens, Gabe
Object Type: Sound
System: The UNT Digital Library