UNT Theses and Dissertations - 4,300 Matching Results

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Incorporating Flow for a Comic [Book] Corrective of Rhetcon
In this essay, I examined the significance of graphic novels as polyvalent texts that hold the potential for creating an aesthetic sense of flow for readers and consumers. In building a justification for the rhetorical examination of comic book culture, I looked at Kenneth Burke's critique of art under capitalism in order to explore the dimensions between comic book creation, distribution, consumption, and reaction from fandom. I also examined Victor Turner's theoretical scope of flow, as an aesthetic related to ritual, communitas, and the liminoid. I analyzed the graphic novels Green Lantern: Rebirth and Y: The Last Man as case studies toward the rhetorical significance of retroactive continuity and the somatic potential of comic books to serve as equipment for living. These conclusions lay groundwork for multiple directions of future research.
Living-learning communities and ethnicity: A study on closing the achievement gap at Regional University
This quasi-experimental study examined the impact of living-learning communities on GPA and fall-to-fall retention rates for college freshmen at Regional University (RU). The specific focus of this study was the effect of these communities on students of different ethnic groups and on the potential of these communities to reduce the academic performance gap. RU was a small public university that offered both undergraduate and graduate degree programs. RU required all freshman students to live on campus in living-learning communities beginning with the 2007-2008 academic year. This study utilized the 343 student freshman cohort class of 2008 in the living-learning communities as the treatment group. This treatment group was compared against the 193 student freshman cohort class of 2008 living off campus and against the 643 student freshman cohort class of 2006 living on campus prior to the implementation of living-learning communities. In addition, the statistics were analyzed by ethnicity to examine the impact of these communities on White, Hispanic, African American, and Native American students and their ability to reduce the academic performance gap. The research revealed that the communities implemented at RU were not statistically significant at improving academic performance or at reducing the achievement gap. The results of this study were not consistent with the literature available on living-learning communities. Current research identifies six fundamental factors critical to the success of living-learning communities: positive working relationship between academic affairs and student affairs, involvement of faculty in the residence halls, appropriate funding, assessment strategies, university wide buy-in to implementing these communities, and commitment from institutional leadership. Examination of the inputs and processes on which these learning communities developed and operated indicated that the majority of these were not well developed to sustain these communities. The divergence of these findings from the literature may be attributed to key departures from …
QEEG and LORETA findings in children with histories of relational trauma.
Abuse and neglect occurring in childhood have been associated with a number of functional and physiological effects on the brain. This study extends previous research that investigated the quantitative electroencephalogram (qEEG) patterns in children with histories of relational trauma through the inclusion of additional participants and measures. As in previous studies, the relative power, absolute power, and coherence values in children with histories of abuse were compared to the Neuroguide database. Results did not show any significant differences in relative or absolute power in the theta range. Similarly, there were no significant coherence differences. Database comparisons were also made using low resolution electromagnetic tomography (LORETA) in order to determine which sub-cortical brain structures may be affected by abuse or trauma, though there were no significant differences in any frequency (0-30Hz). A review of the literature suggests that the prevalence of mu in normal adults and children ranges from 0 to 19%. The present study found a mu prevalence rate of 60.6% in the children who experienced abuse or neglect. Finally, comparisons were made between participants who demonstrate a mu pattern and those who do not to determine if this pattern is associated with certain behavioral and/or attention problems as assessed by the Child Behavior Checklist (CBCL) and the Tests of Variables of Attention (TOVA), respectively. There were no significant differences between children with a mu pattern versus children who did not exhibit a mu pattern on the Social Problems, Thought Problems, or Attention subscale scores on the CBCL or on the Commission subscale score on the TOVA.
This Creature, Bride of Christ
This Creature, Bride of Christ is a composition for soprano, alto flute, viola, marimba, and computer running custom software for live interactive performance in the Max/MSP environment. The work is a setting of excerpts from The Book of Margery Kempe, an early autobiographical manuscript depicting the life of a Christian mystic. The thesis discusses the historical, sociological, and musical context of the text and its musical setting; the use of borrowed materials from music of John Dunstable, Richard Wagner, and the tradition of change ringing; and the technologies used to realize the computer accompaniment. A score of the work is also included in the appendix.
Portraits: A Collection
This collection consists of a critical preface and five short stories. The preface analyzes what it terms 'fringe fiction,' or stories dealing with elements that are improbable or unusual, though not impossible, as it distinguishes this category from magical realism and offers guidelines for writing this kind of fiction. The short stories explore themes of attachment, loss, guilt, and hope. Collection includes the stories "Portrait," "Dress Up," "Change," "Drawn Onward, We Few, Drawn Onward," and "Broker."
An Annotated Bibliography of Selected Music for Saxophone by Charles Ruggiero with an Analysis of Interplay for Soprano Saxophone and Piano
Ruggiero's contributions to contemporary music are noteworthy. They include 27 works written for solo instruments, voice, as well as chamber groups and large ensembles. This study serves as an annotated bibliography of selected works written for saxophone by Charles Ruggiero. They include a piece for large chamber ensemble, Dig: From Tunes My Grandmother Heard (2009), a trio for flute, clarinet, and alto saxophone titled Echoes of "Piano Red" (2006), two saxophone quartets, Dig: JSB 1 (2003), and Three Blues for Saxophone Quartet (1981), two works for alto saxophone and piano, Night Songs and Flights of Fancy (2005), and Strayhorn (1999-2000), one piece for soprano saxophone and piano, Interplay for Soprano Saxophone and Piano (1988), a single movement work for alto saxophone, piano, winds, and percussion, Dance Complusions (2004), one duo for tenor saxophone and percussion, Sizzlesax II (2001), one concerto for soprano saxophone and piano, Concerto for Soprano Saxophone and Orchestra (1995, rev. 1999), and a trio for violin, alto saxophone, and piano, Dances and Other Movements (1983, rev. 1984). In addition, an analysis of Ruggiero's composition Interplay for Soprano Saxophone and Piano offers an insight into the compositional style of the composer.
Music Career Opportunities and Career Compatibility: Interviews with University Music Faculty Members and Professional Musicians
This study used a semistructured interview schedule to identify the music career opportunities available to students who graduate with an undergraduate music degree, and the skills, interests, work values, and personal characteristics that may determine a person's suitability for these music careers. Six university faculty members from each of the 11 NASM-accredited undergraduate music degree fields participated in the study (n = 66). Fourteen professional musicians who were recommended by these faculty members also participated in the study. Concerning the musical and non-musical skills that may determine a person's suitability for a music career, participants consistently noted the importance of performance skills in their respective fields. Participants also consistently cited people skills, and noted that most musicians interact with people on a daily basis, and use people skills to build social networks that may lead to employment. When asked about the interests that may lead someone to a music career, participants commonly cited the importance of good high school ensemble experiences in students' music career decisions. Concerning the rewarding aspects of music careers, many participants noted that they were more rewarded by the ability to support themselves doing what they loved, than by fame or wealth. Concerning the personal characteristics that may determine music career compatibility, participants noted that tenacity is essential to contend with intense competition, extended periods of unemployment, and other common struggles of professional musicians. When asked about music career opportunities in their respective fields, participants reported numerous music careers, some of which were excluded from previous music career inventories. In addition, participants noted that there may be careers for non-musicians in some music career fields. Participants also noted that some music careers may be listed in more than one music career field, creating potential confusion for music career advisors. Finally, participants noted transitions in many music …
An Exploration of the Relationship Between Principal Leadership Efficacy, Principal Computer Self-Efficacy, and Student Achievement
The purpose of this study was to examine whether or not relationships exist between principals' technology proficiency and student achievement as indicated by 2008 Texas Assessment of Knowledge and Skills (TAKS) ninth grade reading scaled scores. Secondly, the study examined whether or not relationships exist between principals' leadership self efficacy and student achievement as indicated in the 2008 Texas Assessment of Knowledge and Skills (TAKS) ninth grade reading scaled scores. Lastly, the select principal's personal and school demographic variables (principal gender, total years of experience as a professional, total years as principal at current school, total years of principal experience, highest degree earned, school economic status, school size) were considered within the study. The survey instruments used in this study were the Technology Proficiency Self Assessment Scale (TPSA) developed by Ropp in 2000 and the Principal's Self-Efficacy Scale (PSES) developed by Tschannen-Moran and Garies in 2004. A total of 129 Texas principal's participated in the study. Multiple regressions were utilized and effect size was considered to determine the strength of the relationship between variables. A statistical significance was found relating to the school's social economic status only when using both the PSES and the TPSA instruments. The effect sizes reported were all moderate, which acknowledged that relationships did exist between all predictor variables tested. Based on the information provided for B weights, School's SES was found to be the best predictor of reading TAKS achievement, preceded by Principal's Highest Degree Earned and Gender. SPSS 16.0 was used to analyze all data. This study adds to the literature on principals' technology efficacy and principal's self efficacy.
Easter Seals North Texas Autism Treatment Program Evaluation: Child Progress
This study reports and evaluates child outcome measures at a non-profit autism treatment program providing applied behavior analysis (ABA) based services to children age 3 to 8. To accomplish this, a review was conducted of available outcome data for a 1 year period. Several categories of outcome measures have been reported in the autism treatment literature (post-intervention educational placement, cognitive status, developmental and achievement status and/or progress, autism symptom reduction, and diagnostic reclassification). This study found that the program relied on 2 sources of data to evaluate child outcome: Hawaii Early Learning Profile® and program goal mastery. Children are making progress as indicated by these measures. The findings are discussed in relation to broader outcome recommendations.
Rediscovering Fernande Decruck's Sonate en ut# pour saxophone alto (ou alto) et orchestre: A Performance Analysis
French composer Fernande Decruck (1896-1954) composed over forty works for the saxophone, but her music fell into obscurity soon after her death. In recent years, the Sonate en ut# pour saxophone alto (ou alto) et orchestre (1943) has been rediscovered, performed, and recorded by prominent concert saxophonists. This document takes a historical approach by examining Decruck's biography, as well as a theoretical approach to provide a deeper understanding and appreciation of her work through analysis. The first four chapters of this document provide biographical background on Decruck, her career, professional associations, and her husband, Maurice Decruck, saxophonist and music publisher. Additionally, an examination of her saxophone output includes a brief discussion of her compositional development. Fernande Decruck dedicated her sonata to French saxophone virtuoso Marcel Mule, but a version for solo viola also exists. From the discrepancies between the versions, one might infer that portions of the work were composed originally for the viola. There are also two versions of the accompaniment: one for full orchestra and the other for piano. Analysis comprises the bulk of this study. The work is composed in a traditional four-movement setting: a sonata-form opening movement, a slow second movement, a movement entitled "Fileuse" (spinning song), substituting for the traditional scherzo, and a rondo-like finale. The work incorporates trends of Impressionism through its harmonic vocabulary, chordal planing, and pentatonic scales. It also demonstrates a sophisticated application of polytonal techniques in several passages. In addition to analysis of each movement, common interpretive practices are discussed, based upon available commercial recorded performances, and performance suggestions are given. There are several notation errors within the parts, as well as some significant differences between the two accompaniments. These errata and discrepancies between the solo parts are listed and discussed.
The Creative Process in Cross-Influential Composition
This dissertation describes a compositional model rooted in cross-influential methodology between complementary musical compositions that share generative source material. In their simultaneous construction, two composition pairs presented challenges that influenced and mediated the other's development with respect to timbre, transposition, pitch material, effects processing, and form. A working prototype first provides a model that is later developed. The first work Thema is for piano alone, and the companion piece Am3ht is for piano and live computer processing via the graphical programming environment Max/MSP. Compositional processes used in the prototype solidify the cross-influential model, demanding flexibility and a dialectic approach. Ideas set forth in the prototype are then explored through a second pair of compositions rooted in cross-influential methodology. The first work Lusmore is scored for solo contrabass and Max/MSP. The second composition Knockgrafton is scored for string orchestra. The flexibility of the cross-influential model is revealed more fully through a discussion of each work's musical development. The utility of the cross-influential compositional model is discussed, particularly within higher academia.
You are what you wear: The examination of fashion leadership and general leadership among African American and Caucasian American college students.
The purpose of this study was twofold. First, the study compared fashion personality characteristics and shopping behaviors of African-American and Caucasian-American college students. Secondly, this study examined characteristics of leadership in general, and fashion leadership specifically, on fashion personality characteristics. The fashion personality characteristics studied included fashion leadership, fashion involvement, shopping enjoyment, and fashion consciousness. The participants consisted of 268 African Americans and 239 Caucasian Americans from two universities in the United States. Ethnicity was found to be an influence on fashion personality characteristics and shopping behaviors in this study. African Americans in the sample were found to have higher levels of fashion personality characteristics and shopping behaviors than Caucasian Americans. Fashion leadership was found to be positively related to general leadership, fashion involvement, shopping enjoyment and fashion consciousness. General leadership was found to be positively related to fashion involvement, shopping enjoyment, fashion consciousness, academic classification level. However, there was no significant difference found between general leadership and age.
Overgeneral Memory and Posttraumatic Stress Disorder in Adults Exposed to Family Violence
Childhood exposure to familial violence increases risk for adult pathology, namely posttraumatic stress disorder (PTSD) and depression. Primary PTSD symptoms of hyperarousal and avoidance are implicated in overgeneral memory (OGM) theory in prior research. Individuals with trauma history tend to report OGMs, or non-specific autobiographical memories, perhaps to avoid unpleasant arousal elicited by recalling specific events. OGM, PTSD, depression, and arousal were assessed in adults with and without familial violence history. Arousal was measured via galvanic skin response (GSR) during an autobiographical memory task (AMT), requiring memory recall in response to emotionally-valenced cue words. Familial violence history was linked to higher incidence of PTSD symptoms. Childhood psychological violence was predictive of adult PTSD. Rates of depression, OGM, and arousal did not significantly vary by violence history. Significant gender differences were found relating to type of violence exposure and adult functioning. Research limitations, clinical implications, and future research suggestions are discussed.
Comparing Indices of Happiness during Teaching Interactions
The measurement of happiness has received increasing attention in behavior analytic literature. Happiness in individuals with developmental disabilities has been assessed by 1) counting a specific behavior, or 2) sampling constellations of behaviors. The purpose of this study was to examine the two approaches while observing nine child and teacher dyads at an autism treatment center. Results showed that, overall, a constellation of behaviors can yield similar patterns when compared to a specific behavior count. However, the affect of one person did not predict the affect of the other and similar instructional conditions did not predict affect either. The implications of these results and future directions are discussed.
To Date or Not to Date? Religious and Racial Dating Choices Among Conservative Christians
This study focuses on exploring the reasons behind dating choices concerning religion and race. Studies report that race is more important than religion in choosing dating partners. Understanding religious and racial dating preferences and choices can help uncover group relations in the larger society. The present study examines the reasons why someone may be willing to date a group outside their religion but not a group outside their race. A pre-interview survey questionnaire was used to locate interview participants. The first 20 respondents who met the specific criteria of being White, single, and a conservative Christian were selected for a qualitative phone interview. To qualify, the respondents needed to be willing to date at least one group that was not Christian, but unwilling to date certain groups outside their race. The interviews were transcribed and the content was analyzed for patterns and themes using the Grounded theory. The results revealed that all the respondents except one were unwilling to date a Black individual and five were unwilling to date any race but White. The least likely to be considered as dating partners for religious groups were the Muslims and atheists. For race, many of the participants viewed Hispanics and Asians as more culturally or physically similar to them than Blacks. The main reasons why the respondents indicated they were willing to date Jewish and agnostic individuals were that they perceived them as similar to themselves in their belief systems. For both religion and race, the respondents were more willing to consider dating groups that were considered to have less stigma in society. The concept of stigma provides a framework for examining the respondents dating choices.
Determining the Relation Between the Moments of Acquisition of Baseline Conditional Discriminations and the Emergence of Equivalence Relations
The experiment was an attempt to gain a more precise understanding of the temporal relation between the development of analytic units and equivalence relations. Two prompting procedures were used during training to pinpoint when eight subjects learned the conditional discriminations. Near simultaneous presentation of probe and training trials allowed for examination of the temporal relation between conditional discrimination acquisition and derived performances on stimulus equivalence probes. The data show that, for seven of eight subjects, a decreased reliance on prompts was coincident with the development of equivalence-consistent choices on either all or some probe trials, which suggests that the development of analytic units is sufficient to give rise to equivalence relations among stimuli.
Antonín Dvořák’s Piano Concerto in G Minor, Opus 33: A Discussion of Musical Intent and Pianistic Effectiveness in Vilém Kurz's Version of the Solo Piano Part
Since its premiere in 1878, Antonín Dvořák’s Piano Concerto in G Minor has been underrated and held in low regard by musicologists, critics, performers and audiences alike. Vilém Kurz (1872-1945), a Czech pianist and pedagogue, revised and reworked the piano solo part to incorporate what he considered to be added brilliance and pianistic effectiveness. However, the revised version has not increased the popularity of the work. In recent decades, this concerto has begun to appear more often in the programs and recordings are currently available, utilizing either the original piano part or Kurz's revision or a combination of both. In order to gain a broader analytical perspective and achieve a more authentic interpretation of the piece, a thorough understanding of the relation between Dvořák’s work and Kurz's revisions is indispensable. This study examines these adaptations and compares them with Dvořák’s scoring in order to gain further insight to Kurz's musical intent and pianistic aims. Examples from all movements are evaluated vis-à-vis the original to determine their purpose and musical validity.
Is Mattering what Matters: A Validation Study of the Meta-Valuing Measure of Flexible Valuing
Freely choosing a life direction, or flexible valuing, is a core component of acceptance and commitment therapy (ACT). Initial research suggests that valuing behavior may contribute to psychological well-being, but has been stymied by a lack of an efficient measure. The current study examined the psychometric characteristics of a new measure of flexible valuing, the Meta-Valuing Measure (MVM), in a sample of 532 undergraduates. Exploratory factors analysis revealed 3 orthogonal factors, Valuing (α = .94), Freedom from Values Conflict (α = .92), and Flexibility in Valuing (α = .73). The majority of expected relationships with other constructs were significant including those with measures of values, mindfulness, quality of life, experiential avoidance, and psychological distress.
The Relationship between Physical Activity and Sleep
The current study aimed to examine the naturalistic relationship between physical activity and sleep by exploring frequency, type, and timing of exercise and their association with a variety of sleep variables (e.g., sleep onset latency, wake after sleep onset, sleep efficiency). Young adults (n = 1003) completed a variety of self-report questionnaires, including a week-long sleep diary and a survey of typical frequency, type, and timing of exercise completed in the past week. Increased frequency of physical activity was related to increased sleep efficiency (total sleep time/time in bed), decreased time in bed, and decreased time spent awake in bed in the morning. Greater amounts of exercise energy expenditure (i.e., metabolic equivalents) per week was related to increased sleep efficiency, and decreased time in bed and time spent awake in bed in the morning. After controlling for other factors, this relationship remained true only for time spent awake in bed in the morning. Early morning exercisers reported shorter total sleep time and time in bed than those who typically exercised at other times. No exercise differences were found between those who met the research diagnostic criteria for insomnia and those who did not. This study provides valuable information to help guide future experimental and intervention studies.
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.
Affordances of Instrumentation in General Chemistry Laboratories
The purpose of this study is to find out what students in the first chemistry course at the undergraduate level (general chemistry for science majors) know about the affordances of instrumentation used in the general chemistry laboratory and how their knowledge develops over time. Overall, students see the PASCO™ system as a useful and accurate measuring tool for general chemistry labs. They see the probeware as easy to use, portable, and able to interact with computers. Students find that the PASCO™ probeware system is useful in their general chemistry labs, more advanced chemistry labs, and in other science classes, and can be used in a variety of labs done in general chemistry. Students learn the affordances of the probeware through the lab manual, the laboratory teaching assistant, by trial and error, and from each other. The use of probeware systems provides lab instructors the opportunity to focus on the concepts illustrated by experiments and the opportunity to spend time discussing the results. In order to teach effectively, the instructor must know the correct name of the components involved, how to assemble and disassemble it correctly, how to troubleshoot the software, and must be able to replace broken or missing components quickly. The use of podcasts or Web-based videos should increase student understanding of affordances of the probeware.
Literature in the Age of Science: Technology and Scientists in the Mid-Twentieth Century Works of Isaac Asimov, John Barth, Arthur C. Clarke, Thomas Pynchon, and Kurt Vonnegut
This study explores the depictions of technology and scientists in the literature of five writers during the 1960s. Scientists and technology associated with nuclear, computer, and space science are examined, focusing on their respective treatments by the following writers: John Barth, Kurt Vonnegut, Thomas Pynchon, Isaac Asimov, and Arthur C. Clarke. Despite the close connections between the abovementioned sciences, space science is largely spared from negative critiques during the sixties. Through an analysis of Barth's Giles Goat-boy, Vonnegut's Cat's Cradle, Pynchon's The Crying of Lot 49, Asimov's short stories "Key Item," "The Last Question," "The Machine That Won the War," "My Son, the Physicist," and Clarke's 2001: A Space Odyssey, it is argued that altruistic goals of space science during the 1960s protect it from the satirical treatments that surround the other sciences.
Optimism, Delay Discounting, and Physical Exercise: The Role of Delay Discounting on Individual Levels of Exercise
Deciding to exercise requires trade-offs between immediate and delayed benefits. These momentary decisions may be moderated by personality such that patterns of individual behavior emerge. The aim of the current study was to determine if higher levels of optimism and lower levels of delay discounting were related to exercise frequency. A sample of 360 undergraduate students completed a survey study related to understanding the choices made by undergraduates and how other factors relate to their decision-making. The survey included measures of optimism, delayed discounting, and self-reported exercise frequency in four domains: cardiovascular, resistance, sports, active lifestyle. Hierarchical linear regression was used to examine optimism and delay discounting as predictors of exercise frequency. Optimism and delay discounting were negatively correlated, but neither was related to exercise frequency. Furthermore, optimism and delay discounting were not significantly related to frequency spent in cardiovascular, resistance, or active lifestyle exercise. However, women scoring higher in delay discounting were more likely to participate in physical sports. The present study helps inform future research by showing potentially important psychosocial variables related to optimism, delay discounting, and exercise.
Rebecca Clarke: A Viola Duo Transcription of the Prelude, Allegro, and Pastorale
Throughout centuries of great classical music, many viola compositions have been crafted from a wealth of literature for instruments of similar range. Clarinet, violin, and cello concerti and ensemble literature often adapt into challenging literature for the viola. In November 2009, Oxford Music Publishing gave me permission to transcribe and perform the Prelude, Allegro, and Pastorale by Rebecca Clarke in New York's famed Carnegie Hall - Weill Recital Hall. This dissertation explains the process by which I transcribed the Prelude, Allegro, and Pastorale from an original Bb-clarinet/viola duo, to a new arrangement for two violas (approved by Oxford Music Press arrangement license #7007940), and discusses challenges faced throughout the transcription process.
Evolution, Not Revolution: The Effect of New Deal Legislation on Industrial Growth and Union Development in Dallas, Texas
The New Deal legislation of the 1930s would threaten Dallas' peaceful industrial appearance. In fact, New Deal programs and legislation did have an effect on the city, albeit an unbalanced mixture of positive and negative outcomes characterized by frustrated workers and industrial intimidation. To summarize, the New Deal did not bring a revolution, but it did continue an evolutionary change for reform. This dissertation investigated several issues pertaining to the development of the textile industry, cement industry, and the Ford automobile factory in Dallas and its labor history before, during, and after the New Deal. New Deal legislation not only created an avenue for industrial workers to achieve better representation but also improved their working conditions. Specifically focusing on the textile, cement, and automobile industries illustrates that the development of union representation is a spectrum, with one end being the passive but successful cement industry experience and the other end being the automobile industry union efforts, which were characterized by violence and intimidation. These case studies illustrate the changing relationship between Dallas labor and the federal government as well as their local management. Challenges to the open shop movement in Dallas occurred before the creation of the New Deal, but it was New Deal legislation that encouraged union developers to recruit workers actively in Dallas. Workers' demands, New Deal industrial regulations, and union activism created a more urban, modern Dallas that would be solidified through the industrial demands for World War II.
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)
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 changes, positive behavioral changes in child, and positive changes in discipline.
The Impact of Training on the Frequency of Internal Promotions of Employees and Managers
In this study, the relationship between formal training opportunities and internal promotions in organizations was examined in order to support the value of organizations investing in employees through training opportunities, as training is often seen as an expense to be cut in difficult times. Differences between general and specific training topics on the impact of frequency of promotion in an organization were addressed, as well as assessing differences between employees and managers. Training allows for a more capable workforce and pool of employees to pull from when an organization needs to hire. Hiring from within can save time, money, and allow for a proven person-organization fit that hiring from the external workforce cannot provide. The archival data used in the study were from the National Organizations Survey, 1996-1997 which included organizations of all sizes and forms. The analyses produced mixed support for the hypotheses. Significant relationships were found between hours of formal training and frequency of promotions of employees, and between importance of training in promotions and frequency of promotions for managers. Multiple regressions revealed that the hypothesis predicting that increased hours of training focused on general skills would positively contribute to promotion rates was not supported for either employees or managers. Exploratory analyses were also conducted to further investigate training and promotion practices. Significant contributions to hours and importance of training in promotion were discovered for certain types of skills training for both the employee and manager groups. Comparison between the employee and manager groups across variables found significant differences in certain skill type training. Practical implications of the findings and future study considerations are discussed.
The Utility of the Spatial Span from the Wechsler Memory Scales in a Geriatric Population with Cognitive Impairments
Performance on the Spatial Span subtest of the Wechsler Memory Scale has been viewed as an indicator of working memory and visuospatial processing. A number of factors including age and gender have been posited to effect performance on Spatial Span by older adults. The current study examined the impact of various forms of cognitive impairment and severity of impairment on Spatial Span performance. Five hundred thirty-eight individuals between the ages of 65 and 89 were evaluated in a university memory disorders clinic using a battery of neuropsychological tests that included Spatial Span. Participants were grouped by consensus diagnosis into type of cognitive impairment (Alzheimer's disease, vascular disease, amnestic mild cognitive impairment or non-amnestic mild cognitive impairment) or cognitively normal. As expected, an increase in severity of impairment results in a decrease in Spatial Span Total Score. Other findings included a weak relationship between age and Spatial Span Total Score. Gender, as well as age, did not fully account for the decline in Spatial Span Total Score. Spatial Span Forward score was not as good a predictor of severity in that reduction in score for Spatial Span Forward remains relatively stable regardless of level of impairment. Spatial Span Backward performance was found to be more sensitive to severity. No significant differences were found between performance of Alzheimer's disease and vascular disease suggesting they share similar deficit patterns with regard to the cognitive abilities measured by the Spatial Span subtest. A comparison between those diagnosed with mild cognitive impairment and individuals without such a diagnosis showed no significant difference suggesting that visuospatial processes are not affected early in the dementing process.
Attenuation of the Squared Canonical Correlation Coefficient Under Varying Estimates of Score Reliability
Research pertaining to the distortion of the squared canonical correlation coefficient has traditionally been limited to the effects of sampling error and associated correction formulas. The purpose of this study was to compare the degree of attenuation of the squared canonical correlation coefficient under varying conditions of score reliability. Monte Carlo simulation methodology was used to fulfill the purpose of this study. Initially, data populations with various manipulated conditions were generated (N = 100,000). Subsequently, 500 random samples were drawn with replacement from each population, and data was subjected to canonical correlation analyses. The canonical correlation results were then analyzed using descriptive statistics and an ANOVA design to determine under which condition(s) the squared canonical correlation coefficient was most attenuated when compared to population Rc2 values. This information was analyzed and used to determine what effect, if any, the different conditions considered in this study had on Rc2. The results from this Monte Carlo investigation clearly illustrated the importance of score reliability when interpreting study results. As evidenced by the outcomes presented, the more measurement error (lower reliability) present in the variables included in an analysis, the more attenuation experienced by the effect size(s) produced in the analysis, in this case Rc2. These results also demonstrated the role between and within set correlation, variable set size, and sample size played in the attenuation levels of the squared canonical correlation coefficient.
An Investigation of the Perceptions of Christian Seminary Counseling Students Regarding Play Therapy
The threefold purpose of this study was to assess the extent to which counseling seminary students' beliefs corresponded to the tenets of child-centered play therapy, the amount of training seminary counseling students received in the area of child counseling and play therapy, and the applicability of child-centered play therapy courses in seminary counselor education programs. The researcher pursued this purpose through administration of a survey instrument she developed. The instrument consisted of 22 demographic items and 23 5-point Likert scale items based on the tenets of child-centered play therapy. The sample was comprised of 206 seminary counseling students from 12 Christian seminaries across the United States: 155 female and 51 male participants ranging in age from 21 to 60 years old and including 5.3% African American, 3.9% Asian, 1.5% Biracial/Multiracial, 3.4% Hispanic, 83% White (Non-Hispanic), 2.4% Other. Multiple regression analysis was utilized to determine which demographic variables were significant predictors of respondents' beliefs regarding child-centered play therapy. Results indicated significance at p < .05 level. Specifically, respondents who reported feeling more prepared to counsel children reported beliefs more congruent with child-centered play therapy, and respondents from the Southwestern and Southeastern portions of the United States exhibited beliefs less congruent with child-centered play therapy. Respondents' reports of their gender, age, denominational grouping, counseling theory, previous training to work with children, parental status, and future plans to counsel children did not significantly predict beliefs corresponding to child-centered play therapy. Descriptive data revealed that 83.5% of respondents intended to counsel children after completing their graduate studies, yet only 20.4% of respondents reported having completed coursework in child counseling; thus, they appeared inadequately prepared to work with this specialized population. Implications for seminary counselor education programs are discussed.
Role of N-Acylethanolamines in Plant Defense Responses: Modulation by Pathogens and Commercial Antimicrobial Stressors
N-acyl ethanolamines (NAEs) are a class of lipids recently recognized as signaling molecules which are controlled, in part, by their degradation by fatty acid amide hydrolase (FAAH). On the basis of previous studies indicating increased NAE levels in a tobacco cell suspension-xylanase elicitor exposure system and the availability of FAAH mutants, overexpressor and knockout (OE and KO) genotypes in Arabidopsis thaliana, further roles of NAEs in A. thaliana plant defense was investigated. The commonly occurring urban antimicrobial contaminant triclosan (TCS) has been shown to suppress lipid signaling associated with plant defense responses. Thus, a second objective of this study was to determine if TCS exposure specifically interferes with NAE levels. No changes in steady state NAE profiles in A. thaliana-Pseudomonas syringae pv. syringae and A. thaliana-flagellin (bacterial peptide, flg22) challenge systems were seen despite evidence that defense responses were activated in these systems. There was a significant drop in enoyl-ACP reductase (ENR) enzyme activity, which catalyzes the last step in the fatty acid biosynthesis pathway in plants, on exposure of the seedlings to TCS at 10 ppm for 24 h and decreased reactive oxygen species (ROS) production due to flg22 in long term exposure of 0.1 ppm and short term exposure of 5 ppm. However, these responses were not accompanied by significant changes in steady state NAE profiles.
Aesthetic and Technical Analysis on Soar!
Soar! is a musical composition written for wind ensemble and computer music. The total duration of the work is approximately 10 minutes. Flocking behavior of migratory birds serves as the most prominent influence on the imagery and local structure of the composition. The cyclical nature of the birds' journey inspires palindromic designs in the temporal domain. Aesthetically, Soar! portrays the fluid shapes of the flocks with numerous grains in the sounds. This effect is achieved by giving individual parts high degree of independence, especially in regards to rhythm. Technically, Soar! explores various interactions among instrumental lines in a wind ensemble, constructs overarching symmetrical structures, and integrates a large ensemble with computer music. The conductor acts as the leader at several improvisational moments in Soar! The use of conductor-initiated musical events in the piece can be traced back through the historic lineage of aleatoric compositions since the middle of the twentieth century. [Score is on p. 54-92.]
DNA Degradation as an Indicator of Post-Mortem Interval
The question of post-mortem interval (PMI) or time since death is often the most sought after piece of information associated with a medical death investigation. Based on the observation that DNA degradation disproportionately affects the analysis of larger genetic loci, it was proposed that DNA degradation, as a result of autolysis or putrefaction, could prove suitable as a potential rate-of-change indicator of PMI. Nine randomly amplified polymorphic DNA (RAPD) analysis primers and three sets of directed amplification primers were evaluated to determine their suitability for use in assessing the degree of DNA fragmentation in tissue samples. They were assessed for amplicon specificity, total DNA target sensitivity, allele monomorphism and the observance of degradation-based profile changes. Markers meeting the requisite criteria were then used to assess a range samples degraded under controlled and uncontrolled conditions. Tissue samples collected from seven domestic pigs (Sus scrofa) were incubated under controlled laboratory or uncontrolled field conditions to produce samples simulating those potentially collected in a forensic case. DNA samples isolated from these specimens were then analyzed at those loci which had been determined to meet the requisite criteria. Collectively, data generated from these analyses indicate that genetic profiles generated by this approach can provide information useful for estimating the post-mortem interval, with the locus and amplicons used being most useful during the first 72 hours after death.
Middle School Students in Virtual Learning Environments
This ethnographic study examined middle school students engaged in a virtual learning environment used in concert with face-to-face instruction in order to complete a collaborative research project. Thirty-eight students from three eighth grade classes participated in this study where data were collected through observation of student work within the virtual learning environment, an online survey, and focus group sessions with students involved in the project. Results indicated students found the virtual learning environment to be valuable as a platform to complete a collaborative research assignment because of portability, ease of use, and organization. Embedded resources within the environment were helpful because of the convenience. Other people, including peers and teachers, were the preferred source of help when problems navigating the environment or finding information arose. Students communicated within the virtual learning environment as a social outlet, a way to check in, and a means to offer content related comments. Ideally the study's findings will give insight into student experiences in a virtual learning environment in order to help educators design more effective learning experiences and incorporate useful supports within such environments.
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.
Ecological Sustainability and Peace: The Effect of Ecological Sustainability on Interstate and Intrastate Environmental Conflict
This study examines the relationship between ecological sustainability and violent conflict at both the interstate and intrastate level. In particular, this study explores the effect of ecological sustainability of a society on the initiation and the occurrence of violent conflict. By developing a theory, which is named "Eco-peace," this study hypothesizes that the more ecologically sustainable the socioeconomic system of societies, the less likely the society is to initiate interstate conflict. Regarding intrastate conflict, it is hypothesized that the more ecologically sustainable the mode of development pursued by the Third World society is, the more likely that society is to experience intrastate conflicts. To test the hypotheses, this study conducts cross-national time-series analyses for 97-127 countries. Negative binomial and Poisson models are used for interstate conflict during 1960-2001, and logit and rare event logit models are used for intrastate conflict during 1960-1999. Militarized interstate dispute dataset and Uppsala Armed Conflict Program dataset are employed for interstate and intrastate conflict. For ecological sustainability, Ecological sustainability factor index and Environmental sustainability index are used. Through the analyses, this study found the supports for the theoretical argument that the ecologically unsustainable modes of development cause the initiation of interstate conflict and the incidence of intra-state conflict in the Third World.
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.
Socioscope: Human Relationship and Behavior Analysis in Mobile Social Networks
The widely used mobile phone, as well as its related technologies had opened opportunities for a complete change on how people interact and build relationship across geographic and time considerations. The convenience of instant communication by mobile phones that broke the barrier of space and time is evidently the key motivational point on why such technologies so important in people's life and daily activities. Mobile phones have become the most popular communication tools. Mobile phone technology is apparently changing our relationship to each other in our work and lives. The impact of new technologies on people's lives in social spaces gives us the chance to rethink the possibilities of technologies in social interaction. Accordingly, mobile phones are basically changing social relations in ways that are intricate to measure with any precision. In this dissertation I propose a socioscope model for social network, relationship and human behavior analysis based on mobile phone call detail records. Because of the diversities and complexities of human social behavior, one technique cannot detect different features of human social behaviors. Therefore I use multiple probability and statistical methods for quantifying social groups, relationships and communication patterns, for predicting social tie strengths and for detecting human behavior changes and unusual consumption events. I propose a new reciprocity index to measure the level of reciprocity between users and their communication partners. The experimental results show that this approach is effective. Among other applications, this work is useful for homeland security, detection of unwanted calls (e.g., spam), telecommunication presence, and marketing. In my future work I plan to analyze and study the social network dynamics and evolution.
Differences Among Abused and Nonabused Younger and Older Adults as Measured by the Hand Test
The purpose of this study was to explore the effects of participants' abused or nonabused status as it interacted with their age and gender in producing different patterns of Hand Test responses as a function of the age or gender of the card. Participants, 61 young adults (M age = 23) and 60 older adults (M age = 73), were presented with the original Hand Test cards, as well as four alternate versions (e.g., young male, young female, older male, and older female). Expected effects varying by age, gender, and abuse status were not found. Results indicated main effects for participant abuse status, which were largely consistent with previous Hand Test research. Significant interaction effects were also found for participant age by participant abuse status (p < .05), as well as participant age by participant gender by participant abuse status (p < .05). An interaction effect was also found for Hand Test version by participant abuse status (p < .05), Hand Test version by participant age by participant abuse status (p < .05), as well as Hand Test version by participant gender by participant abuse status (p < .05). These results suggest that the alternate forms of the cards may pull for certain responses among abused participants that would not have been identified otherwise via the standard version of the Hand Test, clinical interviews, or other projective and self-report measures of personality. Overall, the variations in Hand Test stimuli interact with participants' abuse status, and warrant the use of alternate versions of the Hand Test as a viable projective measure.
Sex and Older Americans: Exploring the Relationship Between Frequency of Sexual Activity and Happiness
The purpose of this study is two-fold: (1) to examine the correlation between frequency of sexual activity and general happiness among older Americans and (2) to examine the correlation between frequency of sexual activity and marital happiness among older married Americans. This study employed quantitative data drawn from the 2004-2008 General Social Surveys. Two samples were used. The first sample included all respondents 65 years of age and older with valid responses for the dependent, independent, and control variables. The second sample was a subset of the first and included only the married respondents. Both bivariate cross-tabulations and binary logistic regression analyses were conducted. As expected, the data support a positive association between sexual activity and general happiness in both the total elder sample and the married elder sample (p < 0.05). Also, as expected, the data support a positive association between frequency of sexual activity and marital happiness in the married elder sample (p < 0.05). Even with the introduction of control variables, frequency of sexual activity was found to be a significant predictor of both general and marital happiness (p < 0.05). This study suggests that sexual activity does indeed contribute the happiness and well-being of older Americans.
Service Matters: The Influence of Military Service on Political Behavior, Ideology and Attitudes
The objective of this research is to explore the influence of military service on political behaviors and attitudes. Existing studies of the military have long recognized the existence of a predominantly conservative political ideology with a resulting propensity for strong Republican Party support within the military community, but have failed to explain the likely causal mechanism for this. Drawing on multiple sources of data from the 2008 Presidential election cycle, I utilized a descriptive analysis of campaign contribution data and bivariate and multivariate analyses of data from the 2008 Military Times Survey and the 2008 American National Election Survey. Much of the data also permitted me to analyze the effect of an individual's service branch on their attitudes as well. I examined the behavior and attitudes of the military across several dimensions, including candidate support and positions on policies of particular relevance to the military, including the wars in Iraq and Afghanistan. This analysis found that people who serve in the military tend to be conservative but in many ways their political attitudes are reflective of those of the general population. An individual's race, ethnicity and gender appear to have more influence than military factors, with the exception of service in the Marine Corps, on ideology, partisan identification and policy preferences.
Rhythms of Interaction in Global Software Development Teams
Researchers have speculated that global software teams have activity patterns that are dictated by work-place schedules or a client's need. Similar patterns have been suggested for individuals enrolled in distant learning projects that require students to post feedback in response to questions or assignments. Researchers tend to accept the notion that students' temporal patterns adjust to academic or social calendars and are a result of choices made within these constraints. Although there is some evidence that culture do have an impact on communication activity behavior, there is not a clear how each of these factors may relate to work done in online groups. This particular study represents a new approach to studying student-group communication activities and also pursues an alternative approach by using activity data from students participating in a global software development project to generate a variety of complex measures that capture patterns about when students work. Students work habits are also often determined by where they live and what they are working on. Moreover, students tend to work on group projects in cycles, which correspond to a start, middle, and end time period. Knowledge obtained from this study should provide insight into current empirical research on global software development by defining the different time variables that can also be used to compare temporal patterns found in real-world teams. It should also inform studies about student team projects by helping instructors schedule group activities.
Self-Objectification, Body Image, Eating Behaviors, and Exercise Dependence among College Females
The purposes of this study were to examine the associations between (a) self-objectification, (b) body shame, (c) appearance anxiety, and (d) exercise dependence. Participants (N = 155) completed a demographic questionnaire and a survey packet including the Body Surveillance subscale and Body Shame subscale of the Objectified Body Consciousness Scale, Appearance Anxiety Scale, Eating Attitudes Test 26, and the Exercise Dependence Scale. Correlations were conducted revealing associations between self-objectification, body shame, appearance anxiety, and eating attitudes. Associations were also found between body shame and exercise dependence. Partial correlations were conducting revealing body shame and appearance anxiety mediated the relationship between self-objectification and eating attitudes. Body shame also mediated the relationship between self-objectification and exercise dependence.
Polystylistic Features of Schnittke's Cello Sonata (1978)
Polystylism in Alfred Schnittke's music has been considered by scholars as a central aspect of his music. Although there are many published analyses of his choral music, symphonies, concerti and violin sonatas, there is no known published research for Schnittke's first cello sonata. Alfred Schnittke grew up in a culturally diverse environment influenced by many different composers and compositional styles under the restrictions of a communist Russian government. These aspects influenced the development of Schnittke's polystylism, characteristically represented by his Cello Sonata (1978). The detailed musical analysis of this sonata in this study serves the purpose to reveal Schnittke's polystylistic tendencies and his use of cyclic elements. These polystylistic elements in the sonata illustrate how Schnittke de-familiarizes listeners from rules commonly accepted as unavoidable and re-familiarizes listeners with the expressive qualities of tonal, twelve-tone and atonal music. Although Schnittke introduces polystylistic materials in de-familiarized contexts in this sonata, this study finds that Schnittke particularly re-familiarizes the audience's musical and stylistic perception through the reappearance of sections, textures and motifs. Abrupt polystylistic conflicts contrast with the repetition of previous materials, thereby forming a combination of traditional styles with features of discontinuity in 20th century music.
Developing an Integrated Supply Chain Costing Approach for Strategic Decision Making
The supply chain management discipline suggests that information sharing is paramount when attempting to achieve cost reductions and quality improvements. In many cases, the traditional accounting data used to support strategic decisions reflect inaccurate supply chain costs. This research explores the applications of managerial costing techniques, and how they can be used to improve the decision making capabilities of firms in the aerospace and transportation industries. The methodology used to address the research questions consisted of a hybrid of the grounded theory and multiple-case study methods. The objective of this research was to present the antecedents and barriers associated with implementing supply chain costing, and the impact that costing approaches have on strategic decision making. The research identifies a theoretical model that can be used to explain the relationships and themes associated with supply chain costing and strategic decision making. Evidence suggests that there is some movement to implement managerial accounting techniques within these two industries to capture supply chain costing information. However, the reliance on traditional financial accounting suggests that the overarching principles of supply chain management and information sharing amongst of partner firms has yet to be realized.
Generation Y Attitudes toward Mobile Advertising: Impacts of Modality and Culture
Mobile phone usage has grown rapidly and is widely used as an advertising channel. Both short message service (SMS) and multimedia messaging service (MMS) are typically used for mobile advertising. The goals of this study are to examine the determinants of attitudes toward mobile advertising in an apparel context and subsequent impact on behavior intention and to investigate the effects of modality and culture on attitudes toward apparel mobile advertising. Results indicate that entertainment, informativeness, irritation, and credibility are determinants of attitudes toward apparel mobile advertising, and attitudes can explain behavioral intention at least in part. Perceived entertainment is different between SMS and MMS apparel mobile advertising, and perceived entertainment, informativeness, irritation, and credibility are different between U.S. and Korea participants.
Regulation and Political Costs in the Oil and Gas Industry: An Investigation of Discretion in Reporting Earnings and Oil and Gas Reserves Estimates
This study investigates the use of discretion by oil and gas companies in reporting financial performance and oil and gas reserve estimates during times of high political scrutiny resulting from increases in energy prices. Hypotheses tested in prior literature state that companies facing the risk of increasing taxes or new regulations reduce reported earnings to reduce this risk. This study uses a measure of high profitability (rank order of return on assets relative to industry peers) to identify oil and gas companies more likely to manage earnings during the period from 2002 to 2008. Two measures of discretionary accruals (total and current discretionary accruals), and a measure of discretionary depreciation, depletion, and amortization (DDA) were used as indicators of discretion exercised in reporting earnings. Data on oil and gas reserve disclosures was also hand-collected from Forms 10-K to investigate whether managers use reserve estimate revisions to reduce reported earnings through increasing the annual depletion expense. Results suggest that both oil and gas refining and producing firms use negative discretionary accruals to reduce reported earnings. Results also indicate that profitability is an important determinant of the use of negative discretionary accruals by these companies regardless of the time period examined. There is also evidence that oil and gas producing firms opportunistically revise their oil and gas reserve estimates to increase depreciation, depletion, and amortization expense during periods of high oil prices.
Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs
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 filters and one broad yellow emission layer from CBP: Pt(ptp)2 displayed a CRI of 78 and CIE of (0.28,0.31) at 100Cd/m² with maximum power efficiency of 6.7±0.3 lm/W and EQE of 5.7±0.2 %.
Wind Energy-related Wildlife Impacts: Analysis and Potential Implications for Rare, Threatened and Endangered Species of Birds and Bats in Texas
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 the spring season. This macro-scale approach for identifying high risk species in Texas could be used as a model to apply to other conterminous states' preliminary evaluation of wind energy impacts.
The Relationship Between Sleep Variables and Headache
Headache pain impacts most of the population at some point in life, at an enormous cost to day-to-day functioning. Determination of the variables that are associated with prevalence and severity of headaches has been inconsistent. One area that deserves more attention is the relationship between headaches and sleep. For instance, several sleep parameters may precipitate or exacerbate headaches, but previous research often used inconsistent and limited assessments of both headaches and sleep, making results difficult to interpret and compare. The current study seeks to extend previous research by using more comprehensive and empirically validated assessment techniques to study the relationship between sleep and headaches in a healthy sample. Greater self-reported sleep quality is related to lower headache frequency and severity, and lower self-reported sleep quality is characteristic of individuals having migraine-type headaches. Greater sleep efficiency is related to lower headache severity and shorter headache duration. Greater sleep onset latency is related to longer headache duration and greater headache severity. Greater number of nighttime awakenings is related to greater headache severity and is characteristic of individuals having a diagnosable headache disorder (either tension-type or migraine-type). Stress appeared to be a partial mediator between self-reported sleep quality and headache severity. Further experimental studies may clarify causality between sleep and headache.
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