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 Resource Type: Thesis or Dissertation
Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs

Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs

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Date: August 2010
Creator: Li, Minghang
Description: Phosphorescent organic light emitting diodes (PHOLEDs) based on efficient electrophosphorescent dopant, platinum(II)-pyridyltriazolate complex, bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) have been studied and improved with respect to power efficiency, external efficiency, chromacity and efficiency roll-off. By studying the electrical and optical behavior of the doped devices and functionality of the various constituent layers, devices with a maximum EQE of 20.8±0.2 % and power efficiency of 45.1±0.9 lm/W (77lm/W with luminaries) have been engineered. This improvement compares to devices whose emission initially could only be detected by a photomultiplier tube in a darkened environment. These devices consisted of a 65 % bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) doped into 4,4'-bis(carbazol-9-yl)triphenylamine (CBP) an EML layer, a hole transporting layer/electron blocker of 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), an electron transport layer of 1,3,5-tris(phenyl-2-benzimidazolyl)-benzene (TPBI), and a LiF/Al cathode. These devices show the acceptable range for warm white light quadrants and qualify to be called "warm white" even w/o adding another emissive layer. Dual EML devices composed of neat Pt(ptp)2 films emitting orange and CBP: Pt(ptp)2 film emitting blue-green produced a color rendering index (CRI) of 59 and color coordinates (CIE) of (0.47,0.49) at 1000Cd/m² with power efficiency of 12.6±0.2 lm/W and EQE of 10.8±0.2 %. Devices with two blue fluorescent emission layers as singlet ...
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Wind Energy-related Wildlife Impacts: Analysis and Potential Implications for Rare, Threatened and Endangered Species of Birds and Bats in Texas

Wind Energy-related Wildlife Impacts: Analysis and Potential Implications for Rare, Threatened and Endangered Species of Birds and Bats in Texas

Date: August 2010
Creator: Graham, Tara L.
Description: Texas currently maintains the highest installed nameplate capacity and does not require publicly available post-construction monitoring studies that examine the impacts of wind energy production on surrounding fauna. This thesis examines potential wind energy impacts on avian and bat species in Texas through a three-part objective. The first two objectives synthesize literature on variables attractive to species within wind development areas and estimate impacted ranges outside of Texas, based on studies examining wind energy's environmental impacts. The third objective focuses on Texas wind development potential for interaction with rare, threatened and endangered species of birds and bats using GIS analysis with a potential hazard index (PHI) model, which addresses broad-spectrum, high risk variables examined within the first two objectives. Assuming areas with higher wind speeds have potential for wind development, PHI values were calculated for 31 avian and ten bat species, based on an analysis of species range data obtained from the Texas Parks and Wildlife Department and wind data obtained from the National Renewable Energy Laboratory. Results indicate one avian species, Tympanuchus pallidicinctus, is at high risk for wind development interaction on an annual basis, with 20 species of birds and nine species of bats at higher risk during ...
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Adlerian Play Therapy: Effectiveness on Disruptive Behaviors of Early Elementary-Aged Children

Adlerian Play Therapy: Effectiveness on Disruptive Behaviors of Early Elementary-Aged Children

Date: August 2010
Creator: Meany-Walen, Kristin K.
Description: Approximately 20% of children experience serious mental health problems severe enough to meet diagnosis criteria, and less than one third of these children receive the services they need. Identifying effective school-based counseling interventions provides a viable and accessible solution, especially for families with financial barriers. This randomized, controlled outcome study examined the effectiveness of Adlerian play therapy (AdPT) compared to reading mentoring (RM) with 58 kindergarten through third grade students who qualified with clinical levels of disruptive behavior in the classroom. Participants were identified as 48% Latino, 33% European American, and 19% African American. Approximately four-fifths of participants were male. Children were randomly assigned to AdPT (experimental group) or RM (active control group) for 16 sessions of treatment. Children in both groups participated in twice weekly, individual, 30-minute interventions that took place in their schools. Results from a two (group) by two (repeated measures) split plot ANOVA indicated that, compared to the RM group over time, the AdPT group demonstrated statistically significant improvement on (a) disruptive behaviors in the classroom, as directly observed by objective raters and as reported by teachers, and (b) stress in the teacher-child relationship, as reported by teachers. Teachers and observers were blinded to children's treatment ...
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The Dichotomy of Congressional Approval

The Dichotomy of Congressional Approval

Date: August 2010
Creator: Moti, Danish Saleem
Description: This thesis seeks to understand how political awareness affects what information one uses to indicate their approval or disapproval of Congress and its members. More concisely, do more and less aware individuals rely on the same pieces of political information to mold their opinions of Congress? The second question of concern is what role does media consumption play in informing survey respondents about Congress. Third, I consider how survey respondents use cues like the condition of the economy and presidential job performance to help formulate their opinion of Congress Finally, by applying the Congressional approval literature to incumbent level approval, I seek to advance the theory and literature on what motivates the approval of incumbents.
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International Distance Learning in Special Education: A Program Evaluation of a US-Ecuador Collaboration

International Distance Learning in Special Education: A Program Evaluation of a US-Ecuador Collaboration

Date: August 2010
Creator: McPherson, Rebekah
Description: The internationalization of distance learning in special education is at a pivotal point in expansion. Even with concerted efforts through traditional means to increase the supply of special educators, shortages persist; therefore, teacher preparation programs are turning to online education. This dissertation study was a formative program evaluation of a bilingual, two-course sequence within a web-based special education master's program offered at the University of North Texas (UNT), in Denton, Texas, and at the Universidad Casa Grande (UCG) in Guayaquil, Ecuador. The research design was based on the unfolding model of program evaluation, and it included mixed-methods of data collection. The model focused attention on (1) scientific evidence, (2) cost-benefit differential, (3) underlying values, and, (4) unintended consequences. Data came from archived documents as well as six semi-structured interviews with stakeholders and survey data from 23 student participants. The findings for the general-orientation course, Special Education Programs and Practices, revealed mixed results concerning multicultural awareness on the part of student participants. However, it seemed to have influenced their lesson design and made a difference in other areas. Some multicultural awareness concepts frequented the discussion board. The specialized course, Assistive Technology, which had more frequent communication between UNT and UCG on ...
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The Green Horizon: An (Environmental) Hermeneutics of Identification with Nature through Literature

The Green Horizon: An (Environmental) Hermeneutics of Identification with Nature through Literature

Date: August 2010
Creator: Bell, Nathan M.
Description: This thesis is an examination of transformative effects of literature on environmental identity. The work begins by examining and expanding the Deep Ecology concept of identification-with-nature. The potential problems with identification through direct encounters are used to argue for the relevance of the possibility of identification-through-literature. Identification-through-literature is then argued for using the hermeneutic and narrative theories of Hans-Georg Gadamer and Paul Ricoeur, as well as various examples of nature writing and fiction.
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An Analysis of Performance Differences Between Self-Directed and Teacher-Directed Alternative Education Campuses in Texas

An Analysis of Performance Differences Between Self-Directed and Teacher-Directed Alternative Education Campuses in Texas

Date: May 2010
Creator: Wimberley, Alan
Description: This study was conducted to analyze the performance differences between alternative education campuses in Texas that used teacher-directed strategies and those that used self-directed strategies. The study was also conducted to inform educators of the results these two strategies had achieved with at-risk students during the three years of 2006-2008. The study used the results from the Texas Assessment of Knowledge and Skills test as reported in the AEIS annual reports from the Texas Education Agency. Alternative education schools were grouped according to the strategy used to educate at-risk students. The results of the statistical tests showed the two strategies had similar performance results and there was no statistical difference between the two. The results offered several implications concerning the ability of at-risk students to achieve in alternative education schools including possible reasons why students who were previously unsuccessful became successful in alternative settings. The report also addressed the number of students who continued to be unsuccessful even when placed on an alternative education campus. Possible reasons for this continued inability to succeed are discussed. Recommendations for further research were listed at the conclusion of the study.
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The Keyboard Music of Peter Philips

The Keyboard Music of Peter Philips

Date: August 2010
Creator: Bennight, Bradley J.
Description: The keyboard works of the English virginalist Peter Philips have been little studied in comparison with his more famous contemporaries, William Byrd, John Bull and Jan Pieterszoon Sweelinck. While Philips left comparatively fewer keyboard works than these composers, his music contains very unique attributes. This study compiles the latest research of Philips' life as well as an analysis of representative works showing many of the individual and uncommon features to be found in Philips' works for keyboard. Pieces from all genres of Philips' keyboard output are represented and discussed, including Pavanes and Galliards, Fantasias and Intabulations of madrigals. Musical examples of each of these works are provided. A description of the instruments needed for the performance of the music and an illustration of the rare type of keyboard instrument required in the Pavana and Galliarda Dolorosa is included. A discussion of Philips' style, particularly regarding ornamentation, is included with a comparison to the works of his contemporaries.
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College Student Resilience: Selected Effects of Service-Learning

College Student Resilience: Selected Effects of Service-Learning

Date: August 2010
Creator: Mercer, J. Carol
Description: 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, η2=.00). However significant results were found between the experimental and control groups (p=.00, η2 =.09). Examination of mean score differences among demographic variable yielded interesting findings across the three disciplines as well as ...
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A Mixed-Methods Approach to the Experiences of Non-Offending Parents of Children who have Experienced Sexual Abuse Participating in Child Parent Relationship Therapy (CPRT)

A Mixed-Methods Approach to the Experiences of Non-Offending Parents of Children who have Experienced Sexual Abuse Participating in Child Parent Relationship Therapy (CPRT)

Date: August 2010
Creator: West, Brooke E.
Description: When a child has been sexually abused, the non-offending parent and child may benefit from an intervention aimed at enhancing the parent child relationship. This mixed-methods study examined the process of child parent relationship therapy (CPRT) with non-offending parents of children who had been sexually abused. One purpose of the present study was to examine change in parent-child relationship, child behavior, and parent empathy of non-offending parents whose children have been sexually abused after participation in CPRT. A secondary purpose of this study was to explore subjective experiences of non-offending parents who participate in CPRT. Participants (N = 8) completed 11 weeks of CPRT in either Spanish speaking (n = 4) or English speaking (n = 4) groups. All participants completed pretest and posttest instruments including Child Behavior Checklist, Parenting Stress Index, and Measurement of Empathy in Adult-Child Interaction. Pretest and posttest means were reported but because of small sample size, only descriptive statistics are reported. Possible trends in pretest/posttest mean scores of the quantitative instruments are discussed. All participants also completed a post semi-structured interview to account for the experience of participants qualitatively. Analysis of the qualitative data revealed enhanced parent-child relationships, improved communication, greater acceptance, positive parental internal ...
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