You limited your search to:

  Partner: UNT Libraries
 Decade: 2010-2019
 Collection: UNT Theses and Dissertations
Carrier Mobility, Charge Trapping Effects on the Efficiency of Heavily Doped Organic Light-Emitting Diodes, and EU(lll) Based Red OLEDs
Transient electroluminescence (EL) was used to measure the onset of emission delay in OLEDs based on transition metal, phosphorescent bis[3,5-bis(2-pyridyl)-1,2,4-triazolato] platinum(ΙΙ) and rare earth, phosphorescent Eu(hfa)3 with 4'-(p-tolyl)-2,2":6',2" terpyridine (ttrpy) doped into 4,4'-bis(carbazol-9-yl) triphenylamine (CBP), from which the carrier mobility was determined. For the Pt(ptp)2 doped CBP films in OLEDs with the structure: ITO/NPB (40nm)/mcp (10nm)/65% Pt(ptp)2:CBP (25nm)/TPBI (30nm)/Mg:Ag (100nm), where NPB=N, N'-bis(1-naphthyl)-N-N'-biphenyl-1, 1'-biphenyl-4, MCP= N, N'-dicarbazolyl-3,5-benzene, TPBI=1,3,5-tris(phenyl-2-benzimidazolyl)-benzene, delayed recombination was observed and based on its dependence on frequency and duty cycle, ascribed to trapping and de-trapping processes at the interface of the emissive layer and electron blocker. The result suggests that the exciton recombination zone is at, or close to the interface between the emissive layer and electron blocker. The lifetime of the thin films of phosphorescent emitter Pt(ptp)2 were studied for comparison with rare earth emitter Eu(hfa)3. The lifetime of 65% Pt(ptp)2:CBP co-film was around 638 nanoseconds at the emission peak of 572nm, and the lifetime of neat Eu(hfa)3 film was obtained around 1 millisecond at 616 nm, which supports the enhanced efficiency obtained from the Pt(ptp)2 devices. The long lifetime and narrow emission of the rare earth dopant Eu(hfa)3 is a fundamental factor limiting device performance. Red organic light emitting diodes (OLEDs) based on the rare earth emitter Eu(hfa)3 with 4'-(p-tolyl)-2,2":6',2" terpyridine (ttrpy) complex have been studied and improved with respect performance. The 4.5% Eu(hfa)3 doped into CBP device produced the best power efficiency of 0.53 lm/W, and current efficiency of 1.09 cd/A. The data suggests that the long lifetime of the f-f transition of the Eu ion is a principal limiting factor irrespective of how efficient the energy transfer from the host to the dopant and the antenna effect are. digital.library.unt.edu/ark:/67531/metadc30483/
A Case Study of the Impact of the Middle School Data Coach on Teacher Use of Educational Test Data to Change Instruction
With the advent of No Child Left Behind (NCLB) legislation in 2002 and its attendant increases in accountability pressure, many districts and schools currently embrace data analysis as an essential part of the instructional decision making process. In their attempts to overcome low achievement on state-mandated tests, some districts have begun employing data coaches. The study reported here, which was set in three middle schools in a northeast Texas school district, assessed the influence of the campus data coach on a middle school mathematics teachers' use of analyzed data to make instructional decisions. It also examined the extent to which the Data Coach/teacher relationship resolved teacher concerns about data-driven decision making. Phenomenological interviews with data coaches were guided by Seidman's (2006) three-series interview. Measurement of teacher use of data to make decisions was based on the concerns-based adoption model's levels of use interview protocol, stages of concern questionnaire, and innovation configuration map. By the end of one school year, two out of the three teachers never used data to make instructional decisions, although the non-users both had moved closer toward employing the innovation in their classroom. Data indicated all teachers were aware of the innovation, but all three ended the study with high personal concerns, signifying that the minimal efforts made by the data coaches to resolve concerns were not successful. This study's small sample gave the research paradigm of data-based decision making an in-depth glimpse into the process of implementing data-based instructional decision making and the Data Coach position on three middle school campuses in one large northeast Texas district. digital.library.unt.edu/ark:/67531/metadc33164/
A Case Study of tu and Vous Use in the French Dubbing and Subtitling in an American Film
Translation and subtitling has always been a complicated dimension of the motion picture industry for years. The problem of dealing with linguistic elements in films and conveying them to audiences of different languages across the globe encompasses many difficulties regarding forms and structures of other languages. One of the more highly researched topics in French linguistic studies has been the use of address pronouns and a range of aspects related to their use and interpretation. Many studies have been conducted over the last sixty years in order to determine and understand these variables. An analysis of several of these studies reveals the many complexities involved in second-person pronoun choice in the French language and the development of the idea of pronoun choice as an act of social identity. The focus of this study is to provide an analysis of the use of formal and informal address pronoun use in the French subtitling and dubbing of an American film, Maid in Manhattan, in order to add, on a broader level, a way to differentially examine perceived norms in a variety of contexts within this medium. digital.library.unt.edu/ark:/67531/metadc68037/
A Case Study of Undergraduate Course Syllabi in Taiwan
Higher education in Taiwan has been influenced by U.S. and Western practices, and syllabi represent one means to verify this. However, limited research exists in Taiwan on course syllabi and on similarities of syllabi with practices in other countries. In the U.S. as the paradigm shifted from teaching to learning and to the learning-centered context, scholars argued that syllabi should be learning-centered. Given the assumption that higher education in Taiwan is similar to U.S. higher education and the call for a learning-centered context, this qualitative research examined 180 undergraduate syllabi at a public university in Taiwan with a (traditional) syllabus component template and a learning-centered syllabus component template derived from the literature in the U.S. to describe (1) the contents of syllabi, and (2) the extent that syllabi in Taiwan were congruent to U. S. syllabus component templates. Syllabi at this university were highly congruent with the (traditional) syllabus component template and were congruent at the medium level with the learning-centered component template. About 90% of syllabi included 8 of 10 major components. Additional findings included: 70% of faculty were male, and 30% were female; more than 75% of the faculty earned their doctoral degrees from the United States or Europe; gender made no difference on inclusion of major components for both templates; there was no difference in inclusion of components on both templates for faculty who earned their doctoral degrees from the U.S. or Taiwan; a high percentage (80%) of college courses adopted English textbooks published in the U.S.; some differences existed and use of English in the syllabus and on components included in the syllabi. Based on these syllabi, it is evident that syllabi in Taiwan represent course planning and organization congruent to recommended practices in the United States. digital.library.unt.edu/ark:/67531/metadc28487/
Cattle Capitol: Misrepresented Environments, Nineteenth Century Symbols of Power, and the Construction of the Texas State House, 1879-1888
State officials, between 1882 and 1888, exchanged three million acres of Texas Panhandle property for construction of the monumental Capitol that continues to house Texas government today. The project and the land went to a Chicago syndicate led by men influential in business and politics. The red granite Austin State House is a recognizable symbol of Texas around the world. So too, the massive tract given in exchange for the building, what became the "fabulous" XIT Ranch, also has come to symbolize the height of the nineteenth century cattle industry. That eastern and foreign capital dominated the cattle business during this period is lesser known, absorbed by the mythology built around the Texas cattle-trail period - all but at an end in 1885. This study examines the interaction of Illinois Republicans and Texas Democrats in their actions and efforts to create what have become two of Texas's most treasured symbols. digital.library.unt.edu/ark:/67531/metadc68017/
Centers of Invariant Differential Operator Algebras for Jacobi Groups of Higher Rank
Let G be a Lie group acting on a homogeneous space G/K. The center of the universal enveloping algebra of the Lie algebra of G maps homomorphically into the center of the algebra of differential operators on G/K invariant under the action of G. In the case that G is a Jacobi Lie group of rank 2, we prove that this homomorphism is surjective and hence that the center of the invariant differential operator algebra is the image of the center of the universal enveloping algebra. This is an extension of work of Bringmann, Conley, and Richter in the rank 1case. digital.library.unt.edu/ark:/67531/metadc283833/
Central Office Administrators' Perceptions of the Professional Learning Community Process
This study provides a qualitative interpretation of the work done by central office administrators in a school district in Texas as they supported and built capacity for the professional learning community (PLC) process over a five year time period. Literature by PLC scholars, especially R. DuFour, R.B. DuFour, Eaker, Hord, Hipp, Huffman, and Olivier, informed development of the study. In a school district of 19,000 students and 2,000 staff members, ten central office administrators were interviewed to gain their perceptions of their roles in the PLC process. Interviews were analyzed through the processes of initial, focused, and theoretical coding. Documents were examined and used as supplemental sources of data to corroborate the perspectives provided. Findings revealed the story of central office administrators who worked interdependently to support and build capacity in the implementation and sustainment of the PLC process. A thick description of the work based on their perceptions offers actions and behaviors of administrators specific to their roles and practices and protocols developed to hold the work together. A grounded theory was developed with regard to central office administrators' support and capacity-building for the PLC process. From the administrators' perceptions, six theoretical categories relating to central office support and capacity building of the PLC process emerged: 1) establishment, 2) deployment, 3) accountability for implementation, 4) adult learning, 5) collaboration, and 6) leadership development. The study contributes an interpretivist description of the involvement of central office in the PLC process and confirms the importance of the change process in the implementation of the PLC framework. digital.library.unt.edu/ark:/67531/metadc283851/
Challenge the Silence
Access: Use of this item is restricted to the UNT Community.
This collection of personal essays about incest, abuse, and depression explores the lasting effects of an invisible childhood. The essays follow the protagonist from the age of five to her early twenties. Her brother, at a young age, becomes sexually abusive of her and her sisters, and her parents fail to protect their daughters. The family is divided as the older girls strive to defend their little sisters, while their parents attempt to excuse their son. When her brother is finally sent away, the protagonist is left to salvage what remains of her relationships with her parents. digital.library.unt.edu/ark:/67531/metadc283840/
A Champion for the Chicano Community: Anita N. Martínez and Her Contributions to the City of Dallas, 1969-1973
Much has been published in Chicano studies over the past thirty to forty years; lacking in the historiography are the roles that Chicanas have played, specifically concerning politics in Dallas, Texas. How were Chicanas able to advance El Movimiento (the Mexican American civil rights movement)? Anita Martínez was the first woman to serve on the Dallas City Council and the first Mexican American woman to be elected to the city council in any major U.S. city. She served on the council from 1969 to 1973 and remained active on various state and local boards until 1984. Although the political system of Dallas has systematically marginalized Mexican American political voices and eradicated Mexican American barrios, some Mexican Americans fought the status quo and actively sought out the improvement of Mexican barrios and an increase in Mexican American political representation, Anita N. Martínez was one of these advocates. Long before she was elected to office, she began her activism with efforts to improve her children’s access to education and efforts to improve the safety of her community. Martinez was a champion for the Chicano community, especially for the youth. Her work for and with young Chicanos has earned her the moniker, “Defender of Dreams.” She created a chicano recreation center in Dallas, as well as various poverty programs and neighborhood beautification projects. Although she has remained relatively unknown, during her tenure on the Dallas City Council, between the years 1969 and 1973, Anita Martínez made invaluable, lasting contributions to the Chicano community in Dallas. digital.library.unt.edu/ark:/67531/metadc84190/
Changes in Gene Expression Levels of the Ecf Sigma Factor Bov1605 Under Ph Shift and Oxidative Stress in the Sheep Pathogen Brucella Ovis
Brucella ovis is a sexually transmitted, facultatively anaerobic, intracellular bacterial pathogen of sheep (Ovis aries) and red deer (Cervus elaphus). Brucella spp. infect primarily by penetrating the mucosa and are phagocytized by host macrophages, where survival and replication occurs. At least in some species, it has been shown that entry into stationary phase is necessary for successful infection. Brucella, like other alphaproteobacteria, lack the canonical stationary phase sigma factor ?s. Research on diverse members of this large phylogenetic group indicate the widespread presence of a conserved four-gene set including an alternative ECF sigma factor, an anti-sigma factor, a response regulator (RR), and a histidine kinase (HK). The first description of the system was made in Methylobacterium extorquens where the RR, named PhyR, was found to regulate the sigma factor activity by sequestering the anti-sigma factor in a process termed "sigma factor mimicry." These systems have been associated with various types of extracellular stress responses in a number of environmental bacteria. I hypothesized that homologous genetic sequences (Bov_1604-1607), which are similarly found among all Brucella species, may regulate survival functions during pathogenesis. To further explore the involvement of this system to conditions analogous to those occurring during infection, pure cultures of B. ovis cells were subjected to environments of pH (5 and 7) for 15, 30, and 45 minutes and oxidative (50mM H2O2) stress, or Spermine NONOate for 60 minutes. RNA was extracted and converted to cDNA andchanges in transcript levels of the sigma factor Bov1605 were measured using qPCR. Preliminary results indicate that under the exposure to Spermine NONOate there was little change in expression, but under oxidative stress expression of the sigma factor Bov1605 was 4.68-fold higher than that expressed under normal conditions. These results suggest that the sigma factor Bov1605 may be involved in oxidative stress defense during infection. Under acid stress (pH5), Bov1605 was found to be upregulated at 15 and 30 minutes, but after 45 and 60 minutes the time decreased. digital.library.unt.edu/ark:/67531/metadc177218/
The Changing Role and Responsibilities of Audit Committees in the United States
The corporate form that developed in the early 20th century created enormous pressure for corporate governance mechanisms to curb the power of corporate managers. Berle and Means, legal pluralists, warned about concentrating economic power in the hands of a small but powerful class of professional managers. They claimed this "new form of absolutism" required governmental oversight and viewed boards of directors as part of management, rather than monitors for shareholders. The Securities and Exchange Commission (SEC) proposed that corporations establish a special board committee, made up of "nonofficer members" in response to the McKesson & Robbins scandal of the late 1930s. My dissertation examines the evolution of the U.S. corporate audit committee through three specific time periods: (1) 1920-1954; (2) 1955-1986; and (3) 1987 to the passage of the Sarbanes-Oxley Act of 2002. My purpose is to determine if evolution of the audit committee throughout these periods has been a reform continually couched in symbolism or whether the audit committee concept has evolved into real reform, allowing proper corporate governance and mitigation of unchecked corporate power. My analysis is a traditional empirical analysis, relying on both primary and secondary sources to develop a coherent ordering of facts. I use narrative in a narrow sense as my historical methodology, examining patterns that emerge and interpreting facts to develop a clear understanding of demands for and uses of audit committees. I use a holistic approach in studying the data, using narrative to show how these patterns ensue from the historical data. digital.library.unt.edu/ark:/67531/metadc30519/
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 play, as well as the inclusion of physical and outdoor activities, etc. Furthermore, habituation constitutes the basis for the acquisition of good habits, and as such it requires the application of rewards and punishment by a caring tutor, who at the same time can serve as a role model for virtuous behavior. Finally, I extrapolate if and how character education can be employed to make people more environmentally conscious citizens. I conclude that environmental virtue or character education is the most effective method of environmental education, since it affects how an individual understands, views, and subsequently interacts with the natural environment. digital.library.unt.edu/ark:/67531/metadc271857/
The Characteristics of a Community of Practice in a National Writing Project Invitational Summer Institute
This qualitative naturalistic descriptive case study provides an understanding of the characteristics of a community of practice within a National Writing Project Invitational Summer Institute. This study utilized naturalistic, descriptive case study methodology to answer the research question: What characteristics of a community of practice are revealed by the perceptions and experiences of the fellows of a National Writing Project Invitational Summer Institute? Data were gathered in the form of interviews, focus group, observations, field notes, and participant reflective pieces. Peer debriefing, triangulation, thick rich description, as well as member checking served to establish credibility and trustworthiness in the study. Bracketing, a phenomenological process of reflecting on one's own experiences of the phenomenon under investigation was utilized as well. The findings of this study point to five analytic themes. These themes, ownership and autonomy, asset-based environment, relationships, socially constructed knowledge and practices, and experiential learning, intertwine to illuminate the three essential components which must be present for a community of practice to exist: joint enterprise, mutual engagement, and shared repertoire. Participants' portraits provide a description of their unique experiences as they moved fluidly between the periphery and core of the community of practice. digital.library.unt.edu/ark:/67531/metadc28461/
Characterization of Arthrobacter Globiformis Aspartate Transcarbamylase Concentrations of Substrates
This thesis consists of one major section with two subsections. The first subsection investigates the activity of Arthrobacter globiformis aspartate transcarbamylase's specific activity with increasing concentrations of the enzyme's substrate. Dihydroorotase (DHOase) activity was also measured with increasing concentrations of the substrate dihydroorotate. The second subsection collected data in order to classify the enzyme, resulting in a classification into the category of class A ATCases with bifunctional ATCase-DHOase complexes. The thesis provides evidence to broaden understanding of the ATCase and DHOase enzymes for members of the family that Arthrobacter belongs to. digital.library.unt.edu/ark:/67531/metadc271918/
Characterization of Ecg Signal Using Programmable System on Chip
Electrocardiography (ECG) monitor is a medical device for recording the electrical activities of the heart using electrodes placed on the body. There are many ECG monitors in the market but it is essential to find the accuracy with which they generate results. Accuracy depends on the processing of the ECG signal which contains several noises and the algorithms used for detecting peaks. Based on these peaks the abnormality in the functioning of the heart can be estimated. Hence this thesis characterizes the ECG signal which helps to detect the abnormalities and determine the accuracy of the system. digital.library.unt.edu/ark:/67531/metadc177242/
Characterization of Ionic Liquid As a Charge Carrier for the Detection of Neutral Organometallic Complexes Using Electrospray Ionization Mass Spectrometry
A novel application of ionic liquid as a charge carrier for the analysis and detection of neutral organometallic complexes using a mass spectrometer has been presented. The mass spectrometer detects only charged compounds which raise a difficulty in analyzing a neutral molecule that lacks a basic site to associate with charge. Therefore, an effective way of providing charge has always been an area of keen interest in the field of mass spectrometry. Ionic liquids have a very fascinating property of forming a cation-? interaction with other molecules to give a charged complex. In order to take advantage of this, it is important to know the geometric structure of the complex. Advanced methodologies like hydrogen-deuterium exchange and computational calculations have been used assisting in better understanding of the structure of the ionic liquid complexes. digital.library.unt.edu/ark:/67531/metadc149615/
A Characterization Of Jackson Blue Spring, Jackson County, Florida
Jackson Blue is a first magnitude spring in the karst terrane of northeast Florida. Previous studies have identified inorganic fertilizer as the source of high nitrate levels in the spring. Agricultural land use and karst vulnerability make Jackson Blue a good model for conservation concerns. This work offers an aggregation of studies relating to the springshed, providing a valuable tool for planning and conservation efforts in the region. An analysis of nitrate levels and other water quality parameters within the springshed did not reveal significantly different values between agricultural and forested land use areas. Confounding factors include: high transmissivity in the aquifer, interspersed land use parcels, and fertilizer application in forested areas due to commercial pine stand activity. digital.library.unt.edu/ark:/67531/metadc103381/
Characterization of Novel Solvents and Absorbents for Chemical Separations
Predictive methods have been employed to characterize chemical separation mediums including solvents and absorbents. These studies included creating Abraham solvation parameter models for room-temperature ionic liquids (RTILs) utilizing novel ion-specific and group contribution methodologies, polydimethyl siloxane (PDMS) utilizing standard methodology, and the micelles cetyltrimethylammonium bromide (CTAB) and sodium dodecylsulfate (SDS) utilizing a combined experimental setup methodology with indicator variables. These predictive models allows for the characterization of both standard and new chemicals for use in chemical separations including gas chromatography (GC), solid phase microextraction (SPME), and micellar electrokinetic chromatography (MEKC). Gas-to-RTIL and water-to-RTIL predictive models were created with a standard deviation of 0.112 and 0.139 log units, respectively, for the ion-specific model and with a standard deviation of 0.155 and 0.177 log units, respectively, for the group contribution fragment method. Enthalpy of solvation for solutes dissolved into ionic liquids predictive models were created with ion-specific coefficients to within standard deviations of 1.7 kJ/mol. These models allow for the characterization of studied ionic liquids as well as prediction of solute-solvent properties of previously unstudied ionic liquids. Predictive models were created for the logarithm of solute's gas-to-fiber sorption and water-to-fiber sorption coefficient for polydimethyl siloxane for wet and dry conditions. These models were created to standard deviations of 0.198 and 0.122 logunits for gas-to-PDMS wet and dry, respectively, as well as 0.164 and 0.134 log units for water-to-PDMS wet and dry, respectively. These models are particularly useful in solid phase microextraction separations. Micelles were studied to create predictive models of the measured micelle-water partition coefficient as well as models of measured MEKC chromatographic retention factors for CTAB and SDS. The resultant predictive models were created with standard deviations of 0.190 log units for the logarithm of the mole fraction concentration of water-to-CTAB, 0.171 log units for the combined logarithms of both the mole fraction concentration of water-to-CTAB and measured MEKC chromatographic retention factors for CTAB, and 0.153 log units for the combined logarithms of both the mole fraction concentration of water-to-SDS and measured MEKC chromatographic retention factors for SDS. digital.library.unt.edu/ark:/67531/metadc67989/
Characterization of Triclocarban, Methyl- Triclosan, and Triclosan in Water, Sediment, and Corbicula Fluminea (Müller, 1774) Using Laboratory, in Situ, and Field Assessments
In the last decade emerging contaminants research has intensified in a bid to answer questions about fate, transport, and effects as these chemicals as they get released into the environment. The chemicals of interest were the antimicrobials; triclocarban (TCC) and triclosan (TCS), and a metabolite of triclosan, methyl triclosan (MTCS). This research was designed to answer the question: what is the fate of these chemicals once they are released from the waste water treatment plant into receiving streams. Three different assessment methods; field monitoring, in-situ experiments, and laboratory studies were used to answer the overall question. TCS, TCC, and MTCS levels were measured in surface water, sediment and the Asiatic clam Corbicula fluminea. Field studies were conducted using four sites at Pecan Creek, Denton TX. Levels of all three chemicals in clams were up to fives orders of magnitude the water concentrations but an order of magnitude lower than in sediment. Highest sediment levels of chemicals were measured in samples from the mouth of Pecan Creek (highest organic matter). TCC was the most and TCS was the least accumulated chemicals. In-situ and lab studies both indicated that uptake of these chemicals into the clams was very rapid and measurable within 24hours of exposure. The after clams were transferred into clean water most of the compounds were depurated within 14 days. digital.library.unt.edu/ark:/67531/metadc67978/
Characterizing Noise and Harmonicity: The Structural Function of Contrasting Sonic Components in Electronic Composition
This dissertation examines the role of noise in shaping the form of several recent musical compositions. This study demonstrates how the contrast of noisy sounds and harmonic sounds can impact the structure of compositions. Depending on context, however, the specific use and function of noise can vary substantially from one work to the next. The first portion of this paper describes methods for quantifying noise content using FFT analysis procedures. A number of tests on instrumental and synthetic sound sources are described in order to demonstrate how the analysis system may react to certain sounds. The second part of this document consists of several analyses of whole musical works. Works for acoustic instruments are examined first, followed by works for electronic media. During these analyses, it becomes clear that while the use of noise in each work is based largely upon context, some common patterns do exist across different works. The final portion of the paper examines an original work which was written with the function of noise specifically in mind. The original work is put through the same analysis procedures as works seen earlier in the paper, and some conclusions are drawn regarding both the possibilities and limitations of noise analysis as a compositional tool. digital.library.unt.edu/ark:/67531/metadc30427/
Charlotte Perkins Gilman: Naturalist Playwright
This study explores Charlotte Perkins Gilman’s use of the dramatic form to challenge Herbert Spencer’s social Darwinism by offering feminist adaptations of Darwin’s theories of natural and sexual selection. As she does in her career-defining manifesto, Women & Economics (1898), Gilman in her lesser-known plays deploys her own brand of reform Darwinism to serve the feminist cause. Despite her absence in histories of modern drama, Gilman actively participated in the establishment and development of this literary, historical, and cultural movement. After situating Gilman in the context of nineteenth-century naturalist theater, this thesis examines two short dramatic dialogues she published in 1890, “The Quarrel,” and “Dame Nature Interviewed,” as well as two full-length plays, Interrupted (1909) and the Balsam Fir (1910). These plays demonstrate Gilman’s efforts to use the dramatic form in her early plays to “rehearse” for Women & Economics, and in her later drama, to “stage” the theories she presents in that book. digital.library.unt.edu/ark:/67531/metadc115172/
Child-Parent Relationship Therapy (CPRT) with Adoptive Families: Effects on Child Behavior, Parent-Child Relationship Stress, and Parental Empathy
This randomized controlled study is a preliminary investigation on the effects of Child-Parent Relationship Therapy (CPRT) with 61 adoptive parents. The participants in this study identified themselves as the following: 54 European American, 3 Black American, 3 Hispanic/Latino, and 1 individual who chose not to indicate ethnicity. The study included 23 couples and 15 individual mothers. The CPRT is a structured, time limited approach that trains caregivers to be an active participant as a therapeutic change agent in their child's life. Results from a two (group) by two (measures) split plot ANOVA indicated that adoptive parents who participated in 10 weeks of CPRT reported statistically significant decreases in child behavior problems and parent child-relationship stress. Statistically significant increases in parent empathy were also reported by raters blinded to the study. CPRT demonstrated a medium to large treatment effect on reducing children's behavior problems and parent-child relationship stress. In addition, CPRT demonstrated a large treatment effect on increasing parental empathy. The results of the study provide preliminary support for CPRT as a responsive intervention for adoptive parents and their children. digital.library.unt.edu/ark:/67531/metadc28403/
Child Rescue As Survival Resistance: Hidden Children in Nazi-occupied Western Europe
Access: Use of this item is restricted to the UNT Community.
The phenomenon of rescue organizations that devoted themselves specifically to hiding and saving Jewish children appeared throughout Nazi-occupied Western Europe (France, Belgium, and the Netherlands). Jewish and non-Jewish rescuers risked their lives to save thousands of children from extermination. This dissertation adds to the historiographical understanding of Holocaust resistance by analyzing the efforts of these child rescue organizations as a form of “survival resistance.” Researching the key aspects of traditional resistance (conscious intent, extensive organization, and effective turn-out) demonstrates that, while child rescue did not present armed resistance, it still was a form of active resistance against the Nazi Final Solution. By looking at rescuers’ testimonies and archival sources (from Yad Vashem, United States Holocaust Memorial Museum, Centre de documentation juive contemporaine, and Kazerne Dossin), this dissertation first outlines the extensive organization and intent of Jewish rescue groups, such as the Oeuvre de Secours aux Enfants (OSE) and Comité de défense des Juifs (CDJ), in France, Belgium, and the Netherlands. The second part looks at rescue organization and intent by Catholic, Protestant, and humanitarian groups. The dissertation concludes by discussing the effectiveness of organized child rescue. In the end, the rescue groups saved thousands of children and proofs that Child rescue in Nazi-occupied Western Europe was a valid--not to mention heroic--form of survival resistance. digital.library.unt.edu/ark:/67531/metadc149581/
Child Teacher Relationship Training As a Head Start Early Mental Health Intervention for Children Exhibiting Disruptive Behavior: an Exploratory Study
This exploratory study examined the effectiveness of child teacher relationship training (CTRT) with at-risk preschool children exhibiting disruptive behavior. The participants included a total of 23 Head Start teachers and their aides, and children identified by their teachers as exhibiting clinical or borderline levels of externalizing behavior problems. Teacher participants included 22 females and 1 male; demographics were reported as 56% Hispanic ethnicity, 17% Black American, and 22% European American. Child participants included 15 males and 5 females; demographics were reported as 60% Hispanic, 30% Black American, and 10% European American. A 2 by 3 (Group x Repeated Measures) split plot ANOVA was used to analyze the data. According to teacher reports using the Teacher Report Form (C-TRF) and blinded raters’ reports using the Direct Observation Form (DOF) to assess disruptive behaviors, children whose teachers received the CTRT intervention demonstrated statistically significant decreases (p < .05) in externalizing behaviors on the C-TRF and total problems on the DOF from pre- to mid- to post-test, compared to children whose teachers participated in the active control group. The CTRT intervention demonstrated large treatment effects on both measures (C-TRF: ?p2 =.173; DOF: ?p2=.164) when compared to CD, revealing the practical significance of the findings on reducing disruptive behaviors. According to independent raters on the DOF, 90% of children receiving the CTRT intervention moved from clinical levels of behavioral concern to more normative levels of functioning following treatment, establishing the clinical significance of CTRT as an early mental health intervention for preschool children in Head start exhibiting disruptive behavior. digital.library.unt.edu/ark:/67531/metadc149553/
Child Teacher Relationship Training (Ctrt) with Children Exhibiting Disruptive Behavior: Effects on Teachers’ Ability to Provide Emotional and Relational Support to Students and on Student-teacher Relationship Stress
This study investigated the impact of child teacher relationship training (CTRT) on teachers’ ability to provide emotional support in the classroom, teachers’ use of relationship-building skills, and teachers’ level of stress related to the student-child relationship. Teachers and aides from one Head Start school were randomly assigned to the experimental group CTRT (n = 11) or an active control Conscious Discipline group (CD; n = 12). Overall, 21 females, 11 (CTRT) and 11 (CD), and one male (CD) participated in the study. Participating teachers and aides identified themselves as the following: 13 Hispanic/Latino, 5 Black American, and 5 European American. Teachers and aides identified children with clinical levels of disruptive behavior problems for the purpose of selecting children of focus for the study. The children’s mean age was 3.63 for CTRT group and 3.36 for CD group. Overall, 9 females, 2 (CTRT) and 7 (CD), and 10 males, 6 (CTRT) and 4 (CD) participated in the study. Teachers reported children’s ethnicity: 13 Hispanic/Latino, 5 African American, and 1 other. A two-factor (Treatment x Group) repeated measures split plot ANOVA was utilized to analyze the data with an alpha level of .05. According to objective raters blinded to the study using the Classroom Assessment Scoring System (CLASS) and the Child Teacher Relationship Skills Checklist (CTRT-SC) and teacher reports using Index of Teaching Stress (ITS), results revealed a statistically significant interaction effect for the experimental teachers’ use of child-teacher relationship skills (CTRT-SC: p = .036), a non-statistically significant interaction effect for the experimental teachers’ ability to provide emotional support (CLASS: p = .50), and a non-statistically significant interaction effect on teacher stress (ITS: p = .997). Partial eta squared effect sizes were calculated to determine the practical significance of the findings. Compared to the active control, CTRT demonstrated large treatment effects over time on the CTRT-SC (?p2 = .19) and the CLASS (?p2 = .16). Study findings provide support for CTRT as an effective intervention for increasing Head Start teachers’ ability to provide emotional and relational support to at-risk students. digital.library.unt.edu/ark:/67531/metadc149655/
Childhood Bereavement and Parents’ Relationship With Children
It has long been recognized that childhood bereavement is a risk factor for depression in adulthood. Research also has consistently demonstrated that parental depression is linked to poor parent-child relationship quality. The current study examined whether bereavement in childhood increases likelihood of current depressive symptoms among parents and explored whether this vulnerability in the parent then alters the quality of the parent-child relationship. Archival data for a sample of 86 families (N=176 parents) are drawn from the Family & Kid Connection project led by Dr. Shelley Riggs. Instruments utilized include the Background Information Questionnaire, the Symptom Assessment-45 Questionnaire, and the Parenting Relationship Questionnaire. Using the Actor-Partner Interdependence Model, Multilevel Modeling procedures explored the hypothesis that parental depression mediates the association between parents’ childhood bereavement and their perception of the parent-child relationship. Results show a significant relationship between parental (actor) depressive symptoms and parent-child attachment, indicating the need for therapeutic interventions targeting the parent-child relationship, and not just parents, for parents suffering from depression. digital.library.unt.edu/ark:/67531/metadc115046/
Children with Autism in Taiwan and the United States: Parental Stress, Parent-child Relationships, and the Reliability of a Child Development Inventory
Autism is one of the fastest growing childhood disorders in the world, and the families that have children with autism experience frustration and stress due to many practical problems. with the increase in the prevalence of autism, it is urgent to raise awareness of autism and to provide services and support for children with autism and their parents to improve the parent-child relationship and moderate the parental stress. with regard to families with children diagnosed as autistic, the purposes of this study are to: (a) examine the group differences in parental stress and parent-child relationship between Taiwan and the United States based on racial and cultural differences; (b) identify factors, if any, that influence the parental stress and parent-children relationship; (c) investigate if there are differences in the results of child development when children are diagnosed with autism in these two countries; (d) establish the Battelle Development Inventory-II in Mandarin Chinese version for use of evaluation with development delays in Taiwan. Findings revealed that: (a) the Battelle Developmental Inventory, Second Edition (BDI-II), is highly reliable with a great value of internal consistency in the use with parents and children with autism in Taiwan; (b) there is no significant difference in child development and parent-child relationship based on geographic region (Taiwan and the United States); (c) parents of children with autism in the United States overall have a more positive parent-child relationship and parenting attitude than parents of children with autism in Taiwan; (d) Children with autism who have a positive relationship with their parents have a higher pass rate on the evaluation of child development; (e) fathers reported higher pass rate on BDI-II than mothers in one of the standard deviations of over BDI-II performance; (f) parent-child relationships are positively correlated with parental stress; (g) parents who received services and support from a government agency or school in Taiwan have significantly lower scores on the parent-child relationship inventory; (h) fathers of children with autism have higher stress level than mothers; (i) parents who received services and support from parent groups (such as PTA or parent association) and from a government agency or school feel less stress than parents that did not receive those supports in Taiwan. digital.library.unt.edu/ark:/67531/metadc115114/
Chirped-Pulse Fourier Transform Microwave Spectroscopy of Fluoroiodoacetonitrile and Chloropentafluoroacetone
This work focuses on finding the complete iodine and nitrogen nuclear electric quadrupole coupling tensors for fluoroiodoacetonitrile using chirped-pulse Fourier transform microwave spectroscopy. Fluoroiodoacetonitrile contains two hyperfine nuclei, iodine (I=5/2) and nitrogen (I=1) and the spectra were observed with great resolution. A total of 499 transitions were observed for this molecule. The a, b and c rotational constants were obtained. A study of chloropentafluoroacetone was also done using chirped-pulse Fourier transform microwave spectroscopy. The two chlorine isotopes for this molecule, Cl-35 and Cl-37 were observed and 326 and 170 transitions were recorded, respectively. digital.library.unt.edu/ark:/67531/metadc84230/
The Chopin Etudes: a Study Guide for Teaching and Learning Opus 10 and Opus 25
Access: Use of this item is restricted to the UNT Community.
The etudes of Chopin are masterworks of the piano literature and are designed to go beyond mere technical exercises; moreover, each etude represents not only a technical study but also has a distinct musical character. Alarmingly, the current trend seems to be to assign the Chopin etudes at an increasingly young age to students who are not yet equipped either technically or musically to handle them. As Chopin’s pupil, Carl Mikuli, commented in the preface to his Chopin edition, the etudes were meant for “more advanced students.” If Chopin had intended his etudes for students at an intermediate level, he would have assigned them to most of his students; however, only a limited number of students had his permission to work on their master’s etudes. As a teacher, I have always felt the need to devise a systematic teaching plan to guide students to handle the challenges of these pieces both physically and musically. This study examines the repertoire which might help prepare a student to learn the etudes without overstraining his/her muscular and mental ability. Rooted in Chopin’s teaching and his recommendation of the pieces to learn before tackling the etudes themselves, this pedagogical study guide intends to help students and teachers to work progressively towards the study of these works. While pinpointing some exercises and simple pieces to assign to a student in preparation for studying the individual etudes, helpful works of later composers are also liberally incorporated, as well as some suggestions for practicing the etudes themselves. Finally, I shall provide my own “re-ordering” of the etudes, with a progressive degree of difficulty, as an additional aid to a young pianist who may eventually want to learn the entire opus 10 and opus 25. digital.library.unt.edu/ark:/67531/metadc115039/
The Choral Music of Ola Gjeilo: a New Vision of the Choral Instrument in the 21St Century
The choral music of Norwegian composer Ola Gjeilo (pronounced “yay-loh”) is gaining international acclaim and is widely performed and commissioned by prominent high school, university, and professional choirs. It represents a philosophical approach and vision of the choral instrument for which the conductor must have a clear understanding in order to prepare a meaningful performance. in particular, his music merges diverse musical influences, which results in a product of unique character among choral compositions in the late 20th and early 21st centuries. Gjeilo draws inspiration from a text but then uses its sonic qualities (the sounds of vowels and consonants) to create an atmosphere of sound instead of following the traditions in choral and vocal music of using musical mechanisms (melody, rhythm, and harmony) to reinforce the text poetically. This study provides an overview of Gjeilo’s background, in Chapter 1, and discusses its influence on his compositional philosophy. Chapter 2 contains musical examples from selected works, which are used to illuminate unique attributes found in Gjeilo’s music. Chapter 3 presents important implications to consider aiding choral conductors in their preparation of future performances of Gjeilo’s music. digital.library.unt.edu/ark:/67531/metadc115152/
A Chorus of Trees
Access: Use of this item is restricted to the UNT Community.
This two-part thesis includes a critical preface and a collection of my poems. Using three poems-Louise Glück's "Lullaby," Bob Hicok's "Poem for My Mother's Hysterectomy," and Nick Flynn's "Memento Mori"-the critical preface examines how, in poetry, the transformation of a body negotiates trauma and triggers a conceptual shift, the creation and revision of identity, and the release of the duende's inspirational force. The collection of poetry that follows seeks to transfigure the body as a way to explore the nuanced traumas of human experience. digital.library.unt.edu/ark:/67531/metadc30485/
Chronic Hypoxia and Hyperoxia Modifies Morphology and Vegf Expression of the Lungs of the Developing Chicken (Gallus Gallus Domesticus)
This study determines effects of oxygen levels on morphology and VEGF expression of developing chicken lungs following incubation in normoxia (21% O2), hypoxia (15% O2) or hyperoxia (30% O2), until developmental days 16 or 18. Lung morphology was assessed using light microscopy, while VEGF expression was determined with ELISA. In hypoxia, the proportion of parabronchial tissue and parabronchi including lumina increased from day 16 to 18 (61 to 68% and 74.2 to 82.2%, respectively). Non-parabronchial tissue was higher in hypoxia than in hyperoxia on day 16 (26 to 20%). However, by day 18, there were no differences between groups. VEGF expression was 33% higher in hypoxia than in hyperoxia on day 16 (736 vs. 492 pg/ml). On day 18, VEGF expression was 43% higher in hyperoxia than in normoxia (673 to 381pg/ml), and remained elevated by 40% in hypoxia over normoxia (631 pg/ml). VEGF may be a mechanism by which parabronchial tissue is stimulated from day 16 to 18 following exposure to chronic hypoxia. digital.library.unt.edu/ark:/67531/metadc177224/
Chronic Insomnia and Healthcare Utilization in Young Adults
Chronic insomnia is a highly prevalent disorder in general and young adult populations, and contributes a significant economic burden on society. Previous studies have shown healthcare utilization (HCU) is significantly higher for people with insomnia than people without insomnia. One limitation with previous research is accurate measurement of HCU in people with insomnia is difficult due to a high co-morbidity of medical and mental health problems as well as varying operational definitions of insomnia. Assessing HCU in people with insomnia can be improved by applying research diagnostic criteria (RDC) for insomnia, using a population with low rates of co-morbid medical/mental health problems, and measuring HCU with subjective, objective, and predictive methods. The current study found young adults with chronic insomnia had greater HCU than normal sleepers, specifically on number of medications, and chronic disease score (CDS) estimates of total healthcare costs, outpatient costs, and predicted number of primary care visits. The presence of a medical and/or mental health problem acted as a moderating variable between chronic insomnia and HCU. Simple effects testing found young adults with chronic insomnia and a medical/mental health problem had the greatest HCU followed by normal sleepers with a medical/mental health problem, chronic insomnia, and normal sleepers. Exploratory analyses found young adults with chronic insomnia had a greater likelihood of emergency room visits and overnight hospital admissions. More efforts for early identification and intervention of insomnia are necessary to help reduce costs associated with chronic insomnia co-morbid with medical and/or mental health problems. digital.library.unt.edu/ark:/67531/metadc84179/
Chronic Myopia: Foundations of Contemporary Western Perspectives on the Balkans
The construction of Southeastern Europe in Western imagination is the result of assertions of imperial power from some of the first recorded histories onward to modern time. Instead of providing alternative narratives gaping differences in time period, literary genres and geographical origins ballast stereotypical racist tropes and derogatory images of the countries of Southeastern Europe. For example, Roman histories, secondary historical works, twentieth century travel literature, and Central Intelligence Agency estimates all exhibit the same perception. The narrative created by these accounts is limited, remarkably racist and counterfactual. While there has been an abundance of new scholarship aimed at debunking the myths surrounding the area, much of the revisionist histories focus on placing blame, proving ethnogenesis, and serving political purposes. Understanding how the sources continue to influence perception is a pivotal step to understanding Southeastern Europe. digital.library.unt.edu/ark:/67531/metadc149619/
The Cimbasso and Tuba in the Operatic Works of Giuseppe Verdi: A Pedagogical and Aesthetic Comparison
In recent years, the use of the cimbasso has gained popularity in Giuseppe Verdi opera performances throughout the world. In the past, the tuba or the bass trombone was used regularly instead of the cimbasso because less regard was given to what Verdi may have intended. Today, one expects more attention to historical precedent, which is evident in many contemporary Verdi opera performances. However, the tuba continues to be used commonly in performances of Verdi opera productions throughout the United States. The use of the tuba in the U.S. is due to a lack of awareness and a limited availability of the cimbasso. This paper demonstrates the pedagogical and aesthetic differences between the use of the tuba and the modern cimbasso when performing the works of Giuseppe Verdi operas. digital.library.unt.edu/ark:/67531/metadc31531/
Civility Matters
While the proliferation of literature on the subject of growing incivility in society demonstrates the increasing importance given to civility by corporate America, there has been little academic investigation of the concept. The limited number of academic studies on civility reveals immense negative consequences for uncivil behavior. One question for marketers of businesses is whether lack of civility among front-end personnel can negatively influence sales. This dissertation is an attempt to fill this research gap by exploring responses to uncivil behavior under the theoretical framework of attribution theory. Using the CDSII scale based on attribution theory, experimental research design was used with current civil and uncivil behavior by the store employees and past experiences (positive, negative, and no-experience) with the store as stimulus. The consumers' perception of civility, attributions and behavioral intentions were measured and used as dependent variables. The results of the experiment showed that when a customer discerns employee behavior to be uncivil, the customer's perception of the level of the ability of the employee to control his own behavior decreases. The results of the study enhance the knowledge of two important consumer behaviors, namely complaining and switching behaviors by empirically studying their antecedents in a particular market interaction context. The results imply that it is important to eliminate or minimize any experience that the customer may construe as negative at a store. If practitioners can work towards eliminating or decreasing certain attributions of consumers, they can reduce the switching behaviors and thus impact customer retention rates and future sales. Though this study contributes to marketing theory and provides vital insights to practitioners, this study is but a starting point for further examination of the role of civility in consumer behavior and decision making. digital.library.unt.edu/ark:/67531/metadc68057/
“Civilizations without Boats”: Stories
This collection consists of a critical preface and nine short stories. Extrapolating from the work and legacy of Michel Foucault, the preface theorizes a genre of “heterotopian fiction” as constitutive of a fundamentally ethical approach to narrative creativity, distinguishing its functional and methodological characteristics from works that privilege aesthetic, thematic, or technical artistry. The stories explore spaces of madness, alterity, incomprehensibility, and liminal experience. Collection includes the stories “Mexico,” “Civilizations without Boats,” The Widow’s Mother,” “Guys Like Us,” “Everything You’d Hoped It Would Be,” “A Concerned Friend,” “Crisis Hotline,” “Coast to Coast,” and “The Ghosts of Rich Men.” digital.library.unt.edu/ark:/67531/metadc84222/
Classless: on Being Middle Class in America
Classless: On Being Middle Class in America is a documentary film that explores what it means to be middle class in America. The film combines personal narrative, folksy reporting, and comedy as the film's director— Joe Brown, tries to reconcile his own status anxiety with everyday understandings of social class. Classless takes the form of a journey; the film travels through the American South, Northeast, and the Mountain West while trying to get at the heart of our middle class American Dream. Classless forwards three main arguments: (1) the American middle class is not as all-encompassing as seems; (2) Americans are more concerned about inequality than both politicians and the media suggest; and (3) many Americans are not actually middle class, economically speaking. digital.library.unt.edu/ark:/67531/metadc271785/
Claude Bolling’s Toot Suite for Trumpet and Jazz Piano: a Performance Guide
Claude Bolling’s Toot Suite for Trumpet and Jazz Piano that was premiered by French virtuoso trumpeter Maurice Andre in 1980 is an important work in the trumpet repertoire. At present, there is limited research regarding Toot Suite. Almost all of the six movements within Toot Suite are performed on a different instrument: C trumpet for Allegre, Eb trumpet for Mystique, Bb cornet for Rag-Polka, Bb piccolo trumpet for Marche, Bb flugelhorn for Vesperale and Bb piccolo for Spirituelle. Chapter 1 examines the life and musical background of the composer. It also exposes the history surrounding the origin of Toot Suite. Chapter 2 discusses the musical influences of the composer that are found in Toot Suite. Chapter 3 provides an analysis of existing studio recordings. Chapter 4 offers specific suggestions regarding preparation and performance of Toot Suite. Chapters 5 and 6 conclude the guide with interviews with the composer and prominent trumpet performers and pedagogues that have recorded and/or have performed Toot Suite live. digital.library.unt.edu/ark:/67531/metadc149650/
Clustering Algorithms for Time Series Gene Expression in Microarray Data
Clustering techniques are important for gene expression data analysis. However, efficient computational algorithms for clustering time-series data are still lacking. This work documents two improvements on an existing profile-based greedy algorithm for short time-series data; the first one is implementation of a scaling method on the pre-processing of the raw data to handle some extreme cases; the second improvement is modifying the strategy to generate better clusters. Simulation data and real microarray data were used to evaluate these improvements; this approach could efficiently generate more accurate clusters. A new feature-based algorithm was also developed in which steady state value; overshoot, rise time, settling time and peak time are generated by the 2nd order control system for the clustering purpose. This feature-based approach is much faster and more accurate than the existing profile-based algorithm for long time-series data. digital.library.unt.edu/ark:/67531/metadc177269/
Coaches’ Influence on Male Adolescents’ Achievement Motivation, Psychological Factors, and Sport Participation
The motivational climate, as created by coaches, and athletes’ goal orientations are key constructs in understanding children’s experiences with sport. In this study, the relationship between the perceived motivational climates, male adolescents’ goal orientation, and their experiences of self-esteem, sport competence, enjoyment, and ultimately, intention to continue participating in sport was examined. Participants were 405 male adolescents (Sample A: n = 200; Sample B: n = 205) aged 13-15 years old. Structural equation modeling indicated an overall good fit to the structural model for both data sets. A task goal orientation was predicted by higher levels of coach-created task climate. Participants with higher task goal orientation had greater sport competence, self-esteem, and more enjoyment in sport; enjoyment was the only significant predictor of their intention to continue playing the sport they believe is most important over the next three years. digital.library.unt.edu/ark:/67531/metadc84226/
Cold-Formed Steel Bolted Connections Using Oversized and Slotted Holes without Washers
In cold-formed steel (CFS) construction, bolted connections without washers for either oversized or slotted holes may significantly expedite the installation process and lower the cost. However, the North American Specification (AISI S100, 2007) for the Design of Cold-Formed Steel Structural Members requires washers to be installed in bolted connections with oversized or slotted holes. A research project (Phase 1) sponsored by American Iron and Steel Institute (AISI) was recently completed at the University of North Texas (UNT) that investigated the performance and strength of bolted CFS connections with oversized and slotted holes without using washers. The research presented in this thesis is the Phase 2 project in which the bolted CFS connections were studied in a broader respect in terms of the failure mechanism, the material thickness, and the hole configurations. Single shear and double shear connections without washers using oversized holes, oversized combined with standard or slotted holes were experimentally examined. Combined with Phase 1 results, the Phase 2 gives a comprehensive evaluation of the behavior and strength of bolted CFS connections with oversized and slotted holes without using washers. Revisions to the existing AISI North American Specification requirements for bolted connections are proposed to account for the reduction in the connection strength caused by the oversized and slotted hole configurations without washers. Specific LRFD and LSD resistance factors and ASD safety factors for different hole configurations in terms of the new proposed methods were presented. digital.library.unt.edu/ark:/67531/metadc30530/
Cold-formed Steel Framed Shear Wall Sheathed with Corrugated Sheet Steel
Incombustibility is one important advantage of the sheet steel sheathed shear wall over wood panel sheathed shear wall. Compared to shear wall sheathed with plywood and OSB panel, shear wall sheathed with flat sheet steel behaved lower shear strength. Although shear wall sheathed with corrugated sheet steel exhibited high nominal strength and high stiffness, the shear wall usually behaved lower ductility resulting from brittle failure at the connection between the sheathing to frames. This research is aimed at developing modifications on the corrugated sheathing to improve the ductility of the shear wall as well as derive practical response modification factor by establishing correct relationship between ductility factor ? and response modification factor R. Totally 21 monotonic and cyclic full-scale shear wall tests were conducted during the winter break in 2012 by the author in NUCONSTEEL Materials Testing Laboratory in the University of North Texas. The research investigated nineteen 8 ft. × 4 ft. shear walls with 68 mil frames and 27 mil corrugation sheet steel in 11 configurations and two more shear walls sheathed with 6/17-in.OSB and 15/32-in. plywood respectively for comparison. The shear walls, which were in some special cutting arrangement patterns, performed better under lateral load conditions according to the behavior of ductility and shear strength and could be used as lateral system in construction. digital.library.unt.edu/ark:/67531/metadc271921/
A Collaborative Affair: The Building of Museum and School Partnerships
This study examined two art museum and school partnerships in order to learn how partnerships enable an integration of goals, participants' beliefs and values, and learning objectives. This study examined the partnerships through a social constructivist lens and used narrative analysis as way to interpret participants' stories about collaboration. The research found three major themes among participants' stories. Participants: a) valued good communication to establish relationships between partners, b) believed partnership offered students experiences that educated the whole person, and c) felt that students making meaning by interacting in the museum environment was an indicator of success. The study closes with discussion of the researchers' own constructions as they developed throughout the study. digital.library.unt.edu/ark:/67531/metadc30532/
A Collective Case Study of Veterans Inside an Arts and Crafts Room and Their Perceptions Regarding Empowerment
This dissertation is "A Collective Case Study of Veterans Inside an Arts and Crafts Room and Their Perceptions Regarding Empowerment." This research examined to what degree art making, and in what ways a community of learning contributed to veterans' self-worth and empowerment through their creative activities and interactions inside an arts and crafts room at the VA hospital in Dallas, Texas. Furthermore, an essential reason for this study is to examine veterans in the arts and crafts environment to explore whether their experiences were important, meaningful, and empowering, and especially important in this regard are the interactions among veterans. Empowerment in this context is defined as gaining self-esteem and motivation within oneself. This includes becoming more confident and positive, as well as gaining the ability to learn about one's own identity. It also described how the interactions between the participants are shaped by the social contexts within which they come together. Using post-modern feminist theory, narrative inquiry and care theory, this dissertation describes the ways that the processes and products of creative activity bring empowerment through dialogue and personal stories while using the component of caring during teaching and learning. digital.library.unt.edu/ark:/67531/metadc177210/
The Collective Pedagogy Utilized By the Trombone Instructors at the Rotterdam Conservatory of the Netherlands
The Collective Pedagogy Utilized by the Trombone Instructors at the Rotterdam Conservatory of the Netherlands offers a comprehensive study of the collaboration between the various instructors of the trombone studio within the Rotterdam Conservatory and their pedagogical approach to curriculum, lesson structure, grading process, student body, and social environment. the Rotterdam Conservatory has produced some of the finest trombonists in the global music community. Alumni from the conservatory consistently win positions in professional ensembles, succeed in national and international competitions, and are often featured artists at international music festivals. the success of their alumni warrants closer scrutiny of the pedagogical approach utilized by the faculty of the conservatory. digital.library.unt.edu/ark:/67531/metadc115177/
College Student Resilience: Selected Effects of Service-Learning
Resilience implies the concept of buoyancy. Specifically, it denotes an individual's capacity to persevere and even do well in the face of adversity. Service-learning is pedagogy often used to enable students to apply classroom learning in a real world context. The goal of this study was to examine the effects of service-learning upon college student resilience. The study utilized a convenience sample of undergraduate students (N = 172) across three disciplines including counseling, social work and kinesiology. In a pre-post test design, the CD-RISC was employed to measure resilience of the experimental and control groups. Factor analysis of the CD-RISC was also conducted in order to explore interrelationship of the variables among the data. One undergraduate sample (N = 210) was used to conduct the EFA before determining a best fit factor structure for this study's population. A repeated measures analysis of variance was employed to detect any differences between pre-post test groups. No statistical significance was found across pre and post-test among the two groups (p=.49, &#951;2=.00). However significant results were found between the experimental and control groups (p=.00, &#951;2 =.09). Examination of mean score differences among demographic variable yielded interesting findings across the three disciplines as well as between age and gender of the participants. Findings indicated students given freedom of choice within service-learning logistics scored greatest gains in resilience. digital.library.unt.edu/ark:/67531/metadc30495/
College Success for all Students: An Investigation of Early Warning Indicators of College Readiness
The purpose of this quantitative study was to determine early warning indicators of college readiness among early college high school students at selected Texas institutions of higher education. Participants in this study included 134 of the class of 2010 from two early college high schools. The graduates were 86% Hispanic, 8% African American, 3% White, 2% Asian, 1% American Indian and 72% economically disadvantaged. A causal-comparative research design using multiple regression analysis of the data collected revealed that each one unit increase in world history was associated with a .470 (p < .05) increase in college GPA, while each one unit increase in Algebra I was associated with a .202 (p < .05) increase. Therefore, student grades in high school Algebra I and world history were the strongest statistically significant indicators that a student will maintain a 2.5 college GPA during the first year of college. According to the early warning indicators, students who maintain a grade of A or B in Algebra I are 10 times more likely to be college ready while having a 78% chance of maintaining a 2.5 or better in college courses. Further, the findings from this study found no significant relationship between TAKS assessment, socioeconomic status, gender or ethnicity and a student's ability to maintain a 2.5 or higher college GPA. Based on the findings from this study, the author recommends an examination of the high school curriculum with the goal of ensuring that students gain competency in courses that indicate college readiness. digital.library.unt.edu/ark:/67531/metadc33141/
Combat Near-Death Experiences: An Exploratory, Mixed-Methods Study
This mixed-methods study’s purpose was a systematic comparison of contents and aftereffects of near-death experiences (NDEs) occurring in a variety of circumstances with those occurring in combat. They completed an online survey: a demographic questionnaire, the Near-Death Experience Scale, the Life Changes Inventory-Revised (LCI-R), and four narrative response items. Survey completers were 68 participants: 20 combat near-death experiencers (cNDErs) and 48 non-NDErs (nNDErs). The 29% of participants who met NDE Scale criterion for an NDE was comparable to NDE incidence findings from previous retrospective studies. For statistical analyses, significance was set at p < .05, and effect size (Cohen’s d) was calculated. Mean total NDE Scale scores were significantly lower for cNDErs than variety-of-circumstance NDErs from one of two comparable studies (t = 5.083, p < .0001, d = -1.26), possibly suggesting cNDEs may have “less depth” than other-variety NDEs. Regarding cNDE aftereffects, absence of previous LCI-R data made comparison impossible. Cronbach’s alpha analysis yielded acceptable reliability on the total scale and seven of nine subscales, a finding that matched Schneeberger’s (2010); however, factor analytic results did not support the hypothesized subscale structure of the LCI-R. Although cNDErs did not score significantly higher than nNDErs on the total scale or subscales after Bonferroni correction, results indicated a possible trend toward greater absolute changes (p = 0.02, d = 0.74) and spirituality (p = 0.02, d = 0.67) with the latter finding substantiated by narrative responses. Informal analysis of narrative responses yielded several themes. digital.library.unt.edu/ark:/67531/metadc84208/
Combining of Korean Traditional Performance and Recent German Techniques in Isang Yun's Kontraste: Zwei Stücke für Violine Solo (1987)
Isang Yun (1917-1995) embraced a masterful combination of two elements derived from his life: his Korean cultural upbringing and Western musical traditions. This dissertation explores Yun's distinctive style through an analysis of his Kontraste: Zwei Stücke für Violine Solo. Following the introduction (Chapter 1), Chapter 2 contains a brief biography of Isang Yun, and explores the compositions of his Korean period (1917-1955) and his European period (1956-1995). It also discusses how Yun's musical styles changed during these two periods as a result of important life events and due to cultural and political influences. Chapter 3 examines Korean instruments such as Kayakem, Hae-Kem, and Pak; discusses Nonghyun (traditional string techniques of ornamentation in Korean music); and introduces Korean performance techniques. This chapter also provides explanations of these concepts, illustrated through various examples. A subsequent discussion illuminates Yin-Yang theory and Jeong-Jung-Dong, both elements of Taoist philosophy that influenced Yun's compositional style. This is followed by explanations of Hauptton and Umspielung, two compositional techniques that Yun developed and employed in Kontraste. Yun created the idea of Hauptton to reflect the Korean traditional concept of a single note. He used the term Umspielung ("playing around" in German) to describe his interpretation of the four traditional techniques of Nonghyun within a Western notational framework. In Chapter 5, analysis of Kontraste reveals how the piece's contrasting elements represent the concepts of Yin-Yang and Jeong-Jung-Dong, and shows how the violin imitates the sounds of Korean traditional instruments and instrumental technique. Yun's adaption of Korean traditional performance techniques to the violin in Kontraste is aimed at combining East and West and producing a new aesthetic. digital.library.unt.edu/ark:/67531/metadc33175/