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Three Topics in Descriptive Set Theory
This dissertation deals with three topics in descriptive set theory. First, the order topology is a natural topology on ordinals. In Chapter 2, a complete classification of order topologies on ordinals up to Borel isomorphism is given, answering a question of Benedikt Löwe. Second, a map between separable metrizable spaces X and Y preserves complete metrizability if Y is completely metrizable whenever X is; the map is resolvable if the image of every open (closed) set in X is resolvable in Y. In Chapter 3, it is proven that resolvable maps preserve complete metrizability, generalizing results of Sierpiński, Vaintein, and Ostrovsky. Third, an equivalence relation on a Polish space has the Laczkovich-Komjáth property if the following holds: for every sequence of analytic sets such that the limit superior along any infinite set of indices meets uncountably many equivalence classes, there is an infinite subsequence such that the intersection of these sets contains a perfect set of pairwise inequivalent elements. In Chapter 4, it is shown that every coanalytic equivalence relation has the Laczkovich-Komjáth property, extending a theorem of Balcerzak and Głąb.
Date:
May 2010
Creator:
Kieftenbeld, Vincent
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Vocal Pedagogy of Frederic Woodman Root
Frederic Woodman Root was a vocal pedagogue and writer of the late nineteenth century. He wrote over eighteen books on vocal pedagogy, and numerous articles on singing. Since his death, most of his works have fallen into obscurity. The purpose of this document was to codify the vocal pedagogy of Frederic Woodman Root, discussing his particularly thorough methodology, and to bring his methods back into the public eye. His method is broken down into the various components of basic musicianship, the General Principle, the Three Vowel Forms, registers, breathing, and agility. Examples from Root's exercises are included and discussed.
Date:
May 2010
Creator:
Grogan, David Christopher
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Speaking up: Applying the Theory of Planned Behavior to Bystander Intervention in Racism
Because racism remains a significant issue in society, and many victims of racism do not speak up for themselves when faced with racism, it is important to explore how witnesses to racist events may react and intervene upon observing racism toward others. Thus, the current study explored how participants (bystanders) reacted verbally to racist comments made by a confederate during a partner activity, as well as how participants discussed their reactions in post-interviews. Forty college students participated in the study, and three of the participants verbally intervened upon hearing the racist statements. Ajzen's theory of planned behavior was utilized as a framework, and examination of the results indicated that components of the theory as well as social constructions of racism and appropriateness of intervention behaviors affect intervention outcomes. Theoretical, methodological, and practical implications, as well as suggestions for future research are included.
Date:
May 2010
Creator:
Hall, Camille Ashley
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Influence of Japanese Composers on the Development of the Repertoire for the Saxophone and the Significance of the Fuzzy Bird Sonata by Takashi Yoshimatsu
The history of the saxophone and its development as a performance medium in Japan is short when compared with other European countries and the United States. In this short history, the saxophone performance level in Japan has increased dramatically. At the same time, compositions for the saxophone by Japanese composers have gained more popularity in the world as can be seen in the program of the World Saxophone Congress and the North American Saxophone Alliance conference. The saxophone history in Japan, including contributions of Arata Sakaguchi (1910-1997), Ryo Noda (b.1948), and Nobuya Sugawa (b.1961), is discussed in order to understand the increase of performances of pieces for saxophone by Japanese composers. The success of many original compositions, especially those that incorporate the synthesis of Eastern and Western music, is another significant element examined in this document. Yoshimatsu approaches music for classical saxophone as a new genre. He seeks all possible sounds that the saxophone can create - beautiful tone to "noise like" - in his compositions. The blending of other musical styles in one piece is one of Yoshimatsu's compositional styles, which can be observed in Fuzzy Bird Sonata; however, he does not limit himself to a single style. This …
Date:
May 2010
Creator:
Hanafusa, Chiaki
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comparison of Heteranthera Dubia (Jacq.) MacM.-associated Macroinvertebrates Between Georgraphical Regions in the United States
Macroinvertebrates associated with the aquatic plant, water stargrass (Heteranthera dubia), were sampled from 12 waterbodies in four regions of the United States from June to August 2005. Taxa richness, evenness, and diversity were lowest in the Lower Midwest (LMW) region, and higher in Northern sites, especially the Upper Midwest (UMW), and Northeast (NE). While relative abundance varied from site to site and region to region, utilization of the plant by functional groups remained fairly constant. Collector-gatherers consistently comprised the largest portion of invertebrates sampled. The shredder/ herbivore functional group comprised an average of 17 % of total groups. Through an exhaustive literature review, it was found that shredder/ herbivores of water stargrass have not been reported in the literature. Because of this, the herbivore group was analyzed separately and consisted of 2,383 specimens representing 23 species. The most common groups were Rhopalosiphum sp., Nectopsyche spp. and chironomids. No differences were found in herbivore diversity or evenness between sampling regions, but species richness was significantly different.
Date:
May 2010
Creator:
Harms, Nathan Earl
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Modulation of the Coelomic Fluid Protein Profile in the Earthworm, Lumbricus Terrestris, After Exposure to Copper as Copper Sulfate
Proteomic techniques were used to analyze the protein profile of earthworm, Lumbricus terrestris, coelomic fluid collected by either whole body dissection method or the coelomic cavity puncture method. Data demonstrated that collection of coelomic fluid using the coelomic cavity puncture method protocol resulted in a 32% reduction, 377 +/- 4.5 vs 253+/- 19.9 (p=0.0007), in the number of individual proteins. It was determined that the coelomic cavity puncture method yielded a "cleaner" preparation, one less contaminated with extraneous proteins from intestinal tissue, gut contents, and body wall materials. This protocol was used in all later studies. The same proteomic techniques were used to evaluate the effects that exposure to Cu (1.0 μg/cm2) as CuSO4 had on the earthworm coelomic fluid profile. Comparison of protein profile from exposed earthworms demonstrated a significant reduction in the number of proteins expressed (184 ± 2.64 vs 253 ±19.9 p=0.0192) when compared to control organisms. Cu exposure also resulted in a modulation of the protein profile with treated earthworms expressing 47 new proteins that were not identified in unexposed worm coelomic fluid. Additionally, 116 proteins found in coelomic fluid collected from normal worms were absent in Cu exposed organisms. Finally, 137 proteins were conserved or …
Date:
May 2010
Creator:
Herring, Reese
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Teaching Points in Comparing the Great Depression to the 2008-2009 Recession in the United States
For an introductory macroeconomics course, the discussion of historical relevance helps foster important learning connections. By comparing the Great Depression to the 2008-2009 recession, a macroeconomics instructor can provide students with connections to history. This paper discusses the major causes of each recession, major fiscal policy and monetary policy decisions of both recessions, and the respective relevance in teaching the relationship of each policy to gross domestic product. The teaching points addressed in this paper are directed towards an introductory college-level macroeconomics course, incorporating a variety of theories from historical and economic writers and data from government and central bank sources. A lesson plan is included in an appendix to assist the instructor in implementing the material.
Date:
May 2010
Creator:
Killian, Tiffany Noel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A study of the Violin Concerto in D Minor by Ralph Vaughan Williams
The focus of this study is to provide a clear understanding of Vaughan Williams' Violin Concerto in D Minor. In terms of form and compositional technique, this concerto is particularly challenging, because of Vaughan Williams' use of rhythmic motives and modes. This study is undertaken through an analysis. For a better understanding, a historical background, including overall form of each movement and key relationships, is explored and discussed. Then, Vaughan Williams' use of a ritornello-like motive, melody and modality as unifying elements is also identified and examined. In identifying the major features of Vaughan Williams' compositional style of this violin concerto, musicians will be able to understand better his unique musical expression. This study may serve as an introduction to the music of Vaughan Williams for musicians and society worldwide. It is hoped that it will motivate all violinists to perform this concerto more frequently.
Date:
May 2010
Creator:
Kim, Si Hyung
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Adaptive Advantages of Carotenoid Pigments in Alpine and Subalpine Copepod Responses to Polycyclic Aromatic Hydrocarbon Induced Phototoxicity
Alpine zooplankton are exposed to a variety of stressors in their natural environment including ultraviolet radiation. Physiological coping mechanisms such as the accumulation of photoprotective compounds provide these zooplankton protection from many of these stressors. Elevated levels of carotenoid compounds such as astaxanthin have been shown to help zooplankton survive longer when exposed to ultraviolet radiation presumably due to the strong antioxidant properties of carotenoid compounds. This antioxidant capacity is important because it may ameliorate natural and anthropogenic stressor-induced oxidative stress. While previous researchers have shown carotenoid compounds impart increased resistance to ultraviolet radiation in populations of zooplankton, little work has focused on the toxicological implications of PAH induced phototoxicity on zooplankton containing high levels of carotenoid compounds. This thesis discusses research studying the role that carotenoid compounds play in reducing PAH induced phototoxicity. By sampling different lakes at elevations ranging from 9,500' to 12,700' in the front range of the Colorado Rocky Mountains, copepod populations containing different levels of carotenoid compounds were obtained. These populations were then challenged with fluoranthene and ultraviolet radiation. Results discussed include differences in survival and levels of lipid peroxidation among populations exhibiting different levels of carotenoid compounds, and the toxicological and ecological implications of …
Date:
May 2010
Creator:
Kovach, Matthew James
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
X, An Analytical Approach to John Chowning's Phoné
The analysis of computer music presents new challenges to the field of music theory. This study examines the fixed media composition Phoné by John Chowning from its aesthetic perspective, compositional theory and computer sound synthesis techniques. Fast Fourier Transform analyses are used to create spectrograms. The findings from the spectrograms are juxtaposed with compositional philosophies of John Chowning, Jean-Claude Risset, Pierre Schaeffer and Arnold Schoenberg and the techniques are represented via PureData patches.
Date:
May 2010
Creator:
Krämer, Reiner
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Legal Analysis of Litigation Against Oklahoma Educators and School Districts under the Oklahoma Governmental Tort Claims Act
This dissertation analyzed public court decisions in cases against Oklahoma school districts and their employees involving sovereign immunity claims filed under Oklahoma's Governmental Tort Claims Act. The questions addressed were: (1) How have the Oklahoma courts interpreted the Governmental Tort Claims Act, (Okla. Stat. tit. 51 § 151 et seq.) in litigation against school districts and their employees? (2) What are the limits of immunity protection for Oklahoma school districts and their employees? (3) How has the statute of limitations in Okla. Stat. tit. 51 § 156 and Okla. Stat. tit. 51 § 157 been applied to Oklahoma educators in tort litigation? This dissertation utilized legal research as the methodology to answer the research questions. Chapter II provides a review of existing literature regarding sovereign immunity in the United States. Chapter III is a comprehensive study of Oklahoma sovereign immunity cases filed against Oklahoma school districts and educators under the Governmental Tort Claims Act with regard to negligence, corporal punishment and the statute of limitations. Chapter IV discusses the findings of the analysis of cases in Oklahoma and the amount of protection afforded to Oklahoma school districts and educators.
Date:
May 2010
Creator:
Lacefield, Kevin Lee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Role of Brand Equity in Reputational Rankings of Specialty Graduate Programs in Colleges of Education: Variables Considered by College of Education Deans and Associate Deans Ranking the Programs
Seeking to identify and further understand the variables considered when ranking specialty programs in colleges of education, this research study surveyed all deans, and associate deans responsible for graduate education, at United States institutions that offer the terminal degree in at least one of the ten education specialty areas. The study utilized a three-dimension model of brand equity from the marketing literature, which included the elaboration likelihood model of persuasion. Descriptive statistics determined that research by the faculty of the specialty program is the variable most widely considered by deans and associate deans when determining reputation. In order to determine what predicts a person's motivation to correctly rank programs, a principal components analysis was utilized as a data reduction technique, with parallel analysis determining component retention. The model identified five components which explained 66.224% of total variance. A multiple regression analysis determined that characteristics of a specialty program was the only statistically significant predictor component of motivation to correctly rank programs (β = .317, p = .008, rs2 = .865); however, a large squared structure coefficient was observed on perceived quality (rs2 = .623). Using descriptive discriminant analyses, the study found there is little evidence that marketing efforts have differing …
Date:
May 2010
Creator:
Lamb, Keith Whitaker
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"Among Waitresses": Stories and Essays
The following collection represents the critical and creative work produced during my doctoral program in English. The dissertation consists of Part I, a critical preface, and Part II, a collection of seven short stories and two nonfiction essays. Part I, which contains the critical preface entitled "What to Say and How to Say It," examines the role of voice in discussions of contemporary literature. The critical preface presents a definition of voice and identifies examples of voice-driven writing in contemporary literature, particularly from the work of Mary Robison, Dorothy Allison, and Kathy Acker. In addition, the critical preface also discusses how the use of flavor, tone, and content contribute to voice, both in work of famous authors and in my own writing. In Part II of my dissertation, I present the creative portion of my work. Part II contains seven works of short fiction, titled "Among Waitresses," "The Lion Tamer," "Restoration Services," "Hospitality," "Blood Relation," "Managerial Timber," and "Velma A Cappella." Each work develops a voice-driven narrative through the use of flavor, tone, and content. Also, two nonfiction essays, titled "Fentanyl and Happy Meals" and "Tracks," close out the collection. "Fentanyl and Happy Meals" describes the impact of methamphetamine addiction …
Date:
May 2010
Creator:
Hobbs, Jessica
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"Being" a Stickist: A Phenomenological Consideration of "Dwelling" in a Virtual Music Scene
Musical instruments are not static, unchanging objects. They are, instead, things that materially evolve in symmetry with human practices. Alterations to an instrument's design often attend to its ergonomic or expressive capacity, but sometimes an innovator causes an entirely new instrument to arise. One such instrument is the Chapman Stick. This instrument's history is closely intertwined with global currents that have evolved into virtual, online scenes. Virtuality obfuscates embodiment, but the Stick's world, like any instrument's, is optimally related in intercorporeal exchanges. Stickists circumvent real and virtual obstacles to engage the Stick world. Using an organology informed by the work of Heidegger and Merleau-Ponty, this study examines how the Chapman Stick, as a material "thing," speaks in and through a virtual, representational environment.
Date:
May 2010
Creator:
Hodges, Jeff
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Can These Bones Live? A Collection of Stories
The collection concerns itself with race, gender, masculinity, marginalization, the act of violence as a means of self expression, identity and the performance of identity, love, and loss. The collection also uses historical events-more specifically, events that are central to black culture in Northeast, Ohio- to situate the characters and witness their response to these historical events. I strive to illustrate blackness as both political and fragmented with the characters in my collection. My characters believe that what they are doing-exacting violence, abusing women, disrespecting each other- is somehow the normative; that somehow what it is that they have learned is how they should perform black identity.
Date:
May 2010
Creator:
Hoey, Danny M., Jr.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Instructional Leadership Responsibilities of Assistant Principals in Large Texas High Schools
The purpose of this study was to determine the extent secondary assistant principals in large Texas high schools demonstrate behaviors consistent with what the literature describes as instructional leadership. Three hundred seventy principals and assistant principals of large Texas high schools participated in this study. The Principal Instructional Management Rating Scale (Hallinger, 1987) was used to quantify instructional leadership in 10 different job functions. The study found that (a) assistant principals perceive themselves as exhibiting instructional leadership behaviors at a high frequency, (b) principals perceive their assistant principals exhibiting instructional leadership behaviors at a high frequency, (c) the perceptions of the principals and assistant principals were similar, and (d) principals and assistant principals reported more engagement in instructional leadership responsibilities and felt more pressured over the last five years under the new accountability and rating requirements of No Child Left Behind and the state assessments. These findings suggested that the administrative roles and responsibilities in high schools should be restructured to allow assistant principals to focus on instructional leadership.
Date:
May 2010
Creator:
Howard-Schwind, Michelle
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Routine Leisure Activities and Adolescent Marijuana Use: Moderating Effects of Family Structure
How adolescents spend their time is a crucial predictor of their engagement in delinquency. Activities with peers away from direct supervision of adults are of concern as more opportunities and motivation to use marijuana exist in such situations. However, adolescents may vary in their propensity to use marijuana when faced the opportunity. Especially adolescents living with a single parent may have a higher propensity compared to those from two-parent households to use marijuana due to reduced parental monitoring and increased peer attachment. This thesis investigates the moderating effects of family structure on the routine leisure activities and adolescent marijuana use relationship, using data from Monitoring the Future Study 2007, 12th Grade Survey. The results provide partial support for the moderating effects.
Date:
May 2010
Creator:
Aksu, Gokhan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
L'emploi variable des signes diacritiques dans le français tchaté : une étude variationniste en temps apparent .
After providing an historical overview of the French spelling system and orthographic variation, this study analyzes selected internal (i.e., linguistic) factors and one external (i.e., social) factor that can influence the use of diacritics in online French-language chat sessions. From a corpus of synchronous computer-mediated communication, 3,855 tokens of graphemes capable of bearing diacritics were coded with the following scheme: Letter, Diacritic, Grapheme (i.e., Letter and Diacritic combined), Date of Participation, and Age Group of Participant. A multivariate (VARBRUL) analysis determined that Grapheme exerts the most influence on variation.
Date:
May 2010
Creator:
Al-Rashdan, Omar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Infrastructure for the UNT Digital Library
This presentation discusses creating workflows for digitization projects as well as data models and descriptive metadata schema. It describes the processes of creating a workable model to digitize objects.
Date:
July 15, 2010
Creator:
Phillips, Mark Edward
Object Type:
Presentation
System:
The UNT Digital Library
Infrastructure for the UNT Digital Library
This presentation discusses the University of North Texas Libraries' Digital Projects Unit workflows, how they overcame challenges, and how the use of established models and standards helped them find solutions to the workflow. It presents the editing system created for the Digital Projects Unit, the organizational structure for each object, and identifiers.
Date:
August 2, 2010
Creator:
Phillips, Mark Edward
Object Type:
Presentation
System:
The UNT Digital Library
Determination of the Optimal Number of Strata for Bias Reduction in Propensity Score Matching.
Previous research implementing stratification on the propensity score has generally relied on using five strata, based on prior theoretical groundwork and minimal empirical evidence as to the suitability of quintiles to adequately reduce bias in all cases and across all sample sizes. This study investigates bias reduction across varying number of strata and sample sizes via a large-scale simulation to determine the adequacy of quintiles for bias reduction under all conditions. Sample sizes ranged from 100 to 50,000 and strata from 3 to 20. Both the percentage of bias reduction and the standardized selection bias were examined. The results show that while the particular covariates in the simulation met certain criteria with five strata that greater bias reduction could be achieved by increasing the number of strata, especially with larger sample sizes. Simulation code written in R is included.
Date:
May 2010
Creator:
Akers, Allen
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Effects of Suspended Multi-Walled Carbon Nanotubes on Daphnid Growth and Reproduction
Multi-walled carbon nanotube aggregates can be suspended in the aqueous phase by natural organic matter. These aggregates are ingested by filter feeding zooplankton. Ingested aggregates result in decreased growth and decreased reproduction. These effects may be caused by reduction in energy input from normal feeding behavior. pH alters natural organic matter structure through changes in electrostatic repulsion. Altered natural organic matter structure changes multi-walled carbon nanotube aggregate size. This size variation with variation in pH is significant, but not large enough a change in size to alter toxicity, as the aggregate size range remains well within the particle size selection of the organisms.
Date:
May 2010
Creator:
Alloy, Matthew Michael
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Enameling Arts in Kuwaiti Pre-service Art Teacher Education
The purpose of this study was twofold: (1) to examine the knowledge, skills, and experiences in the enameling arts and the attitudes and perceptions of in-service (n = 12) and pre-service Kuwaiti art teachers (n = 170), art supervisors at the Ministry of Education (MOE) (n = 3) and art education faculty members at the College of Basic Education (CBE) and Kuwait University (KU) (n = 8) about what they believed pre-service art teachers should know and be able to do in order to teach the enameling arts, and (2) to use this information to inform and guide the development of a content outline for an enameling course for pre-service Kuwaiti art teachers that is educationally (how to perform enameling arts skills and how to teach what they know), practically (safety issues, workshop management, etc), and culturally (its relation to Islamic culture) suitable. Both quantitative and qualitative approaches were used. Most of the respondents revealed limited knowledge and skills and modest experiences in the enameling arts. All interviewees in the study expressed positive perceptions and attitudes about the enameling arts. Most agreed that a revision to the current art education curriculum at the CBE was needed and made suggestions about …
Date:
May 2010
Creator:
Darweesh, Ali Hussain
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Information Seeking Behavior of Crime Scene Investigators in the Turkish National Police
This exploratory research is the first one among occupational information seeking behavior studies that focuses on information seeking behaviors of the crime scene investigators. The data used in this dissertation were gathered via a self-administrated survey instrument from 29 cities in Turkey. Findings obtained from the data analyses show that there is a strongly positive relationship between the experience of the crime scene investigators and the use of personal knowledge and experience as a primary information source (experience is operationalized with age, service years in policing, and service years in crime scene investigation units). The findings also suggest that increasing of the level of education is negatively related to relying on immediate colleagues as an information source among the crime scene investigators. These findings are consistent with related literature and theory. The data analysis shows that crime scene investigators work in cities with higher population rates have more complaint scores than those who work in cities with lower population rates across Turkey. The findings from the data analysis may suggest valuable implications to defeat the barriers between crime scene investigators and information sources. The researcher drew a proposed theoretical framework of an information behavior concept in the context of crime …
Date:
May 2010
Creator:
Demircioglu, Mehmet
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library