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 Collection: UNT Theses and Dissertations
The Influence of Extraversion, Religiosity, and Spirituality on Health Behaviors
Religion and spirituality are thought to be of great importance for the meaning and quality of life for many individuals, and research suggests that there may be important health benefits associated with religion and spirituality. Religion and spirituality should be related to health behaviors for a number of reasons. Health behaviors are important contributors to an individual's overall health, illness and mortality. Major negative health behaviors related to health outcomes are smoking, excessive alcohol consumption, obesity, risky driving, and high risk sexual behaviors. Health behaviors may also be linked to personality traits. The key trait examined for this study was extraversion. It includes adjectives such as being active, assertive, energetic, outgoing, and talkative. In this thesis, I take several hypotheses and explore the influence of extraversion, religiosity, and spirituality on health behaviors. digital.library.unt.edu/ark:/67531/metadc271834/
Homeless Predictors in the Older Adult Population
This secondary research study uses data from two convenience samples of homeless persons in Central Arkansas collected during 2004 and 2011 Point in Time Counts. The prevalence of predictors of homelessness are compared across years, and also compared by age (<50 and > 50) controlling for year of survey. The number of older adults increased significantly between 2004 and 2011 surveys, and reporting serious mental illness and veteran status significantly decreased from 2004 to 2011. Age differences were noted in 2004 with older adults more likely to report serious mental illness in comparison to younger adults. Older adults were also more likely to report veteran status in comparison to younger adults during both the 2004 and 2011 surveys. The predictors of homelessness -- including serious health problems, substance abuse, race, age, and developmental disabilities-- remained fairly consistent from 2004 to 2011 and across "age groups". In addition to Point in Time data, qualitative surveys and interviews of providers were performed for their observations of the older homeless population. Providers indicated their belief that the older homeless population is increasing. Providers suggested possible challenges and reasons for the increase among older adults who are homeless. In central Arkansas, service providers feel the current economy, programs, and agencies that provide homeless services and funding sources are adequate at this time as evidenced by no increase in numbers. Due to new funding, improvement has occurred with the veteran population through VA programs. Even though this research did not find any change in gender, the providers feel that for future homeless, trends in gender (women in poverty), as well as older adults becoming homeless for the first time, should be watched in addition to other predictive factors such as the economy, increase in substance abuse, and physical and mental health concerns. digital.library.unt.edu/ark:/67531/metadc271855/
An Analysis of Pitch Organization in Villa-lobos's Rudepoêma
Heitor Villa-Lobos (1887-1959) stands central to the music history of the Brazilian twentieth century. His music represents a synthesis of the European art influences he absorbed and his quest to find a true Brazilian identity, which was not rooted in the deliberate imitation of Brazilian folk elements, but rather in the natural assimilation of them in his compositional style. His early compositions embody strong post-romantic, impressionistic tendencies, especially in regard to their harmonies and use of tone color, whereas the works from the 1920's and onwards show Villa-Lobos increasingly asserting his unusual and strong voice. Villa-Lobos's large-scale composition for piano, Rudepoêma, was composed between 1921 and 1926, and stands as one of the most significant contributions to the Latin-American piano literature. Despite of its importance in Villa-Lobos's oeuvre, it has largely eluded analytical attention. Discourse on Villa-Lobos is often marked by a somewhat one-dimensional approach that identifies the folk and rhythmic elements as the most important characteristics of his compositional style, and displays a certain reticence with regard to in-depth analysis of other parameters of his works. This study redresses the imbalance in the general approach to analytical assessment of Villa-Lobos's oeuvre by illustrating that pitch organization plays an indispensable role in establishing formal unity between the multiple sections of this complex work. digital.library.unt.edu/ark:/67531/metadc271848/
Reinforcement Sensitivity Theory and Proposed Personality Traits for the Dsm-v: Association with Mood Disorder Symptoms
The current work assesses the relationship between reinforcement sensitivity theory (RST) and Personality Traits for the DSM-5 (PID-5), to explore the degree to which they are associated with mood disorder symptoms. Participants (N = 138) from a large public university in the South were administered a semi-structured interview to assess for current mood disorder and anxiety symptoms. They were also administered self-report inventories, including the Behavioral Inhibition System (BIS) and Behavioral Approach System (BAS) scales and the Personality Inventory for DSM-5 (PID-5). Results indicate that both the BIS/BAS scales and the PID-5 scales were strongly associated with current mood symptoms. However, the maladaptive personality traits demonstrated significantly greater associations with symptoms compared to the BIS/BAS scales. Results also indicated support for using a 2-factor model of BIS as opposed to a single factor model. Personality models (such as the five factor model) are strongly associated with mood symptoms. Results from this study add to the literature by demonstrating credibility of an alternative five-factor model of personality focused on maladaptive traits. Knowledge of individual maladaptive personality profiles can be easily obtained and used to influence case conceptualizations and create treatment plans in clinical settings. digital.library.unt.edu/ark:/67531/metadc271842/
The Ho Chi Minh Trail and Operation Commando Hunt: the Failure of an Aerial Interdiction Campaign
In November 1968, the United States 7th Air Force began a year-round bombing campaign of southeastern Laos to slow the infiltration of Vietnamese troops and supplies into South Vietnam. Despite the massive amount of bombs dropped, the campaigns of Operation Commando Hunt were unable to stop the Communists from sending men and materiel down the Ho Chi Minh Trail to support their operations in the south. This thesis seeks to show that President Lyndon Johnson's decision to stop bombing North Vietnam and President Richard Nixon's Vietnamization policy, along with the North Vietnamese's determination to keep their supply route open, combined to prevent Operation Commando Hunt from achieving its goal. digital.library.unt.edu/ark:/67531/metadc271824/
The Use of a Real Life Simulated Problem Based Learning Activity in a Corporate Environment
This narrative study examines using a real life simulated problem base learning activity during education of clinical staff, which is expected to design and develop clinically correct electronic charting systems. Expertise in healthcare does not readily transcend to the realm of manipulating software to collect patient data that is pertinent to the care of patients. To gain the expertise, troubleshooting abilities and knowledge required to maintain their clinical system, each participant in this study has gone through the RLSPBL activity. Education in the corporate world must be effective and efficient while providing a good return on the educational investment. Corporate education must use material contextually similar to a workplace, and the techniques for education must provide both near and far transfer of the material. Ten individuals (eight clinical, two non-clinical) who work across the United States were interviewed; their reflections on their career as a clinical interface designer are told here. The participants varied in their age, educational background, and current work responsibility and computer experience. Their insights revealed four major themes which summarize their stories: problem-based learning, collaboration, hands-on activities and the use of a real-life simulated problem-based learning activity.The clinical environment requires patient safety as a paramount parameter in building a clinical charting system. Up to the moment information along with trending capabilities is critical to a clinician caring for a patient. Adhering to best practices and maintaining an efficient data entry system must seamlessly blend technology into the clinician's practice. An understanding of the education of individuals who have created such charting systems is presented here in hopes that what these participants have found to be significant can be shared with others in similar situations. digital.library.unt.edu/ark:/67531/metadc271852/
Some Soundwalks (Denton, Tx)
some soundwalks (Denton, TX) is an audio portrait of the Denton square - the area in downtown Denton bordered by the streets Oak, Hickory, Elm, and Locust. For three months (June - August, 2012), I went on soundwalks in this area, recording the soundscape and collecting material from each hour of the twenty-four hours of the day. The resulting work is presented as a layered montage of this gathered material that takes the listener on a twenty-four hour journey through the Denton square in about eighteen minutes. Ultimately, this sonic portrait of the Denton square is my subjective reaction to the daily soundscape of an area of Denton that embodies a strong sense of tradition combined with a newer presence of a growing population. digital.library.unt.edu/ark:/67531/metadc271833/
Community Resilience in Thailand: a Case Study of Flood Response in Nakhonsawan City Municipality
Natural disasters such as flooding often affect vast areas and create infinite demands that need to be addressed in the same time. The wide scopes and severe impacts of such catastrophes often exceed, if not overwhelm, capacity of the national government to handle. In such a situation, communities such as cities and neighborhoods need to rely on their own capacity (resources, strategies, and expertise) to respond to disaster impacts at least until external assistance can be reached. Thus, studying how communities can be resilient to the impacts of natural disasters is important because this would enhance their ability to respond to the next disaster better. Within the context of great flooding in Thailand in 2011, this dissertation investigated the factors that generated or enhanced resilience of flood stricken-communities in Thailand. Nakhonswan City Municipality was selected as the research site. Qualitative research methods were employed in this study. Data were collected using in-depth interview and focus group. Thirty-six participants (28 for in-depth interview and 8 for focus group interview) from various organizations were recruited using snowball and purposive sampling strategies. Interview data from the field research were transcribed, translated from Thai language to English, and then analyzed using open coding and focused coding strategies. Analyses of in-depth interview data revealed eight conceptual themes representing factors that constituted resilience of Nakhonsawan City Municipality, as the leading organization responded to the flood. These factors are: availability of resources for resilience; managerial adaptability; crisis leadership; quality workforce; knowledge sharing and learning; organizational preparedness; organizational integration; and sectoral integration. In addition, findings from the focus group interview with members of three strong neighborhoods found eight factors that helped these neighborhoods respond effectively to the flood crisis. They included: self-reliance; cooperation; local wisdom; preparedness; internal support; external support; crisis adaptability; and pre-disaster social cohesion. This dissertation ended with the discussion of implications, limitations and suggestions for future research. digital.library.unt.edu/ark:/67531/metadc271841/
Connecting the Circuit: Analyzing Jurors' Cognitive Gaps and Damage Awards in Patent Infringement Trials
Patent litigation is notorious for the technicality of evidence and the rhetoric of experts. Citizens selected to serve on the jury have no specialized training and have rarely been exposed to the technology or the patent process. This study provides insight into the field of jury decision-making in complex patent cases by analyzing the cognitive gaps and the tactics used by jurors to minimize them. Additionally, the study examines the justifications for the damage awards jurors provide. This analysis focused on jurors engaged in mock trial patent deliberations. The story model and sensemaking theory serve as the theoretical framework of this research and provide a structure for support and a lens for analysis. The results indicate that jurors rely on three distinct and dichotomous topologies when navigating cognitive gaps. Searching for answers either individually or as a group, relying on lists or stories, and turning to facts or emotions, jurors navigate through their uncertainty. Through the line-by-line analysis of mock jury transcriptions, three continuums regarding damage justifications emerged. Jury members found themselves navigating uncertainty versus certainty, rationality versus irrationality, and facts versus emotions. The theoretical implications broaden the story model to include cognitive gaps in all phases and increase the model's efficacy in patent litigation through the addition of a fourth phase. This study also confirms and enhances the use of sensemaking to describe the jury decision-making process. The results of this study should be applied practically to the field of patent litigation. Results should be used to create a user-friendly environment where the high stakes of litigation demand increased juror understanding and are critical to justice. digital.library.unt.edu/ark:/67531/metadc271808/
Effect of Retting on Surface Chemistry and Mechanical Performance Interactions in Natural Fibers for High Performance Polymer Composites
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Sustainability through replacement of non-renewable fibers with renewable fibers is an ecological need. Impact of transportation costs from South-east Asia on the life cycle analysis of the composite is detrimental. Kenaf is an easily grown crop in America. Farm based processing involves placing the harvested crop in rivers and ponds, where retting of the fibers from the plant (separation into fibers) can take 2 weeks or more. The objective of this thesis is to analyze industrially viable processes for generating fibers and examine their synergistic impact on mechanical performance, surface topography and chemistry for functional composites. Comparison has been made with commercial and conventional retting process, including alkali retting, enzymatic retting, retting in river and pond water (retting occurs by natural microbial population) with controlled microbial retting. The resulting kenaf fibers were characterized by dynamic mechanical analysis (DMA), Raman spectroscopy (FT-Raman), Fourier transform infrared spectroscopy (FT-IR), polarized optical microscopy (POM), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) optical fluorescence microscopy, atomic force microscopy (AFM) and carbohydrate analysis. DMA results showed that pectinase and microbe treated fibers have superior viscoelastic properties compared to alkali retting. XPS, Raman, FT-IR and biochemical analysis indicated that the controlled microbial and pectinase retting was effective in removing pectin, hemicellulose and lignin. SEM, optical microscopy and AFM analysis showed the surface morphology and cross sectional architecture were preserved in pectinase retting. Experimental results showed that enzymatic retting at 48 hours and controlled microbial retting at 72 hours yield uniform and superior quality fibers compared to alkali and natural retting process. Controlled microbial retting is an inexpensive way to produce quality fibers for polymer composite reinforcement. digital.library.unt.edu/ark:/67531/metadc271883/
Dario Castello's Music for Sackbut: the Sonate Concertate in Stil Moderno (1629)
Dario Castello's Sonate concertate in stil moderno is a collection of 29 trio sonatas in two volumes, with 10 of them employing the sackbut. These works represent a significant repertoire for the sackbut in an era where specific instrumentation was only starting to become a convention. While these pieces are often studied, performed and recorded in Europe, most American trombonists are not aware of their existence. This study seeks to acquaint the American trombonist with the sonatas of Castello and to provide performance suggestions for those less familiar with this genre. Chapter 1 presents a survey of the current literature on Castello. Chapter 2 provides an historical background for music in Venice in the early 17th century, while Chpater 3 focuses on the composer and his music for sackbut. Chapter 4 investigages the sonata in early 17th century Venice. Chapter 5 provides an insight into early baroque performance practice by discussing principles such as affect, tempo, ornamentation, diminution and articulation. Examples from the ten sonatas are used to illustrate these principles, providing the modern trombonist with a framework in which to study Castello's music. The final chapter discusses the implications of this study on the American trombone curriculum. digital.library.unt.edu/ark:/67531/metadc271830/
Direct Strength Method for Web Crippling of Cold-formed Steel C-sections
Web crippling is a form of localized buckling that occurs at points of transverse concentrated loading or supports of thin-walled structural members. The theoretical computation of web crippling strength is quite complex as it involves a large number of factors such as initial imperfections, local yielding at load application and instability of web. The existing design provision in North American specification for cold-formed steel C-sections (AISI S100, 2007) to calculate the web-crippling strength is based on the experimental investigation. The objective of this research is to extend the direct strength method to the web crippling strength of cold-formed steel C-sections. ABAQUS is used as a main tool to apply finite element analysis and is used to do the elastic buckling analysis. The work was carried out on C-sections under interior two flange (ITF) loading, end two flange (ETF) loading cases. Total of 128 (58 ITF, 70 ETF) sections were analyzed. Sections with various heights (3.5 in.to 6 in.) and various lengths (21 in. to 36 in.) were considered. Data is collected from the tests conducted in laboratory and the data from the previous researches is used, to extend the direct strength method to cold formed steel sections. Proposing a new design for both the loading cases and calculation of the resistance factors under (AISI S100, 2007) standards is done. digital.library.unt.edu/ark:/67531/metadc271893/
Recidivism Among Juvenile Sex Offenders in Texas
Juvenile sex offenders represent a serious and violent group of delinquents. Despite the severity of their crimes, the literature focusing on risk factors that influence recidivism and the types of re-arrest after incarceration is lacking. This research study examined 499 determinately sentenced juvenile sex offenders that were released from the Texas Juvenile Justice Department. This sample was then followed for three years upon their release. This analysis revealed that 51.5 percent were re-arrested for any offense while 45.91 percent were re-arrested for a felony offense. This study identified a number of risk factors relative to JSO recidivism. These factors include having a history of emotional abuse, race being African American, being gang affiliated, having a larger number of previous adjudications, and having higher counts of institutional misconduct infractions. Those JSOs older at intake and release, and those who were incarcerated for longer periods of time were less likely to re-offend upon release. Lastly, this study ends with suggestions for future research as well as policy implications geared toward juvenile sex offenders. digital.library.unt.edu/ark:/67531/metadc271862/
The Effects of Homework Sessions on Undergraduate Students' Homework Performance
Experimenters evaluated the effects of a homework session on undergraduate students' homework performance through an adapted alternating treatments design in two introduction to behavior analysis courses. Several participants attended homework sessions; however, homework submission and homework mastery did not vary as a function of homework session attendance or availability. Homework submission remained high throughout the experiment regardless of attendance at or availability of a homework session. Many participants responded that they were not interested in or did not need homework sessions. Participants who attended homework sessions rated them as neutral or helpful overall, with longer time and different time as the most common suggestions for improvement. digital.library.unt.edu/ark:/67531/metadc271826/
An Examination of How 4-8 Preservice Teachers Understand and Implement Multicultural Concepts
Preparing teachers to teach in the diverse classroom has become one of the most important goals for universities and teacher training programs. The main purposes of this study included to examine what type of multicultural concepts were taught preservice teachers who sought certification in Grades 4-8 and how these preservice teachers understood and implemented multicultural concepts in their educational portfolios and coursework, field experiences, and student teaching. The population of the study consisted of 53 undergraduate, preservice teachers enrolled in the last two years of a 4-8 teacher certification program. A modified grounded theory methodology and interpretive approach was used in the analysis of the course syllabi, required readings and student coursework. The study found that this particular program exposed the preservice teachers to a significant number of multicultural concepts in preparation for teaching in the ethnically diverse schools in the area. In addition, the study looked at which of Grant and Sleeter's five multicultural approaches were found most often in the course syllabi and required readings, as well as the preservice teachers' portfolio artifacts, key assessments, and reflective writing samples. The research found the majority of the course syllabi and assigned readings covered concepts in the human relations and multicultural education approaches. The majority of the preservice teachers in this study identified most often with the multicultural education approach, although all five multicultural approaches were found in various portfolio artifacts, key assessments, and reflective writing samples. The study further indicates it was a combination of the multicultural courses, the field experiences, the student teaching, and the preservice teachers' adaptability to ethnic diversity that helped the preservice teachers experience successful opportunities with the students. The adaptability of the preservice teachers in the study also appears to match recent research that suggests that university students in general may be growing more accustomed to the ethnic diversity in the communities around them as the population demographics changes. digital.library.unt.edu/ark:/67531/metadc271892/
Modeling Transition Metal Catalysts for Small Molecule Activation and Functionalization
There is a high demand for the development of processes for the conversion of ubiquitous molecules into industrially useful commodities. Transition metal catalysts are often utilized for the activation and functionalization of small organic molecules due to their diverse nature and proven utility with a myriad of chemical transformations. The functionalization of methane (CH4) and dinitrogen (N2) to methanol (CH3OH) and ammonia (NH3) respectively is of particular interest; however, both methane and dinitrogen are essentially inert due to the inherit strength of their bonds. In this dissertation a series of computational studies is performed to better understand the fundamental chemistry behind the functionalization of methane and the activation of dinitrogen in a homogeneous environment. A catalytic cycle is proposed for the oxy-functionalization of methane to methanol. The cycle consists of two key steps: (1) C-H activation across a metal-alkoxide bond (M-OR), and (2) regeneration of the M-OR species through an oxy-insertion step utilizing external oxidants. The C-H activation step has been extensively studied; however, the latter step is not as well understood with limited examples. For this work, we focus on the oxy-insertion step starting with a class of compounds known to do C-H activation (i.e., Pt(II) systems). Computational studies have been carried out in an attempt to guide experimental collaborators to promising new systems. Thus, the majority of this dissertation is an attempt to extend transition metal mediated C-O bond forming reactions to complexes known to perform C-H activation chemistry. The last chapter involves a computational study of the homogeneous cleavage of N2 utilizing iron-?-diketiminate fragments. This reaction has been studied experimentally, however, the reactive intermediates were not isolated and the mechanism of this reaction was unknown. Density functional theory (DFT) calculations are carried out to elucidate the mechanism of the reductive cleavage of N2 via the sequential addition of iron- ?-diketiminate fragments to N2 to form a bis-nitride (N3-) intermediate. The role of potassium promoters on the dinitrogen and bis-nitride species is also investigated. digital.library.unt.edu/ark:/67531/metadc271814/
Graev Metrics and Isometry Groups of Polish Ultrametric Spaces
This dissertation presents results about computations of Graev metrics on free groups and characterizes isometry groups of countable noncompact Heine-Borel Polish ultrametric spaces. In Chapter 2, computations of Graev metrics are performed on free groups. One of the related results answers an open question of Van Den Dries and Gao. In Chapter 3, isometry groups of countable noncompact Heine-Borel Polish ultrametric spaces are characterized. The notion of generalized tree is defined and a correspondence between the isomorphism group of a generalized tree and the isometry group of a Heine-Borel Polish ultrametric space is established. The concept of a weak inverse limit is introduced to capture the characterization of isomorphism groups of generalized trees. In Chapter 4, partial results of isometry groups of uncountable compact ultrametric spaces are given. It turns out that every compact ultrametric space has a unique countable orbital decomposition. An orbital space consists of disjoint orbits. An orbit subspace of an orbital space is actually a compact homogeneous ultrametric subspace. digital.library.unt.edu/ark:/67531/metadc271898/
The Separation of Rehabilitation from Production Costs in the Vocational Rehabilitation Workshop
The problem with which this study is concerned is the separation of rehabilitation from production costs in vocational rehabilitation workshops. Within workshops there are those functions and tasks—testing, counseling, and the administration thereof—which clearly are rehabilitative. The costs of these activities, therefore, are solely rehabilitation costs. In the production area of workshop operations, however, where production and rehabilitation efforts are intertwined, two kinds of costs are incurred simultaneously: (l) rehabilitation or training costs and (2) production costs. As yet, no generally accepted procedures exist for separating these joint costs. digital.library.unt.edu/ark:/67531/metadc278160/
The Relationship of Developmentally Appropriate Beliefs and Practices of Greek Kindergarten Teachers
Sixty Greek kindergarten teachers were surveyed regarding their teaching beliefs and practices using the Teachers Questionnaire based on guidelines recommended by the National Association for the Education of Young Children. A Varimax factor analysis produced four factors for the Teacher Belief Scale and five factors for the Instructional Activities Scale. Scores on developmentally appropriate factors were consistently higher than factors classified developmentally inappropriate. Correlation between appropriate beliefs and activities was significant (r = .470); correlation between inappropriate beliefs and practices was significant (r = .475). However, developmentally inappropriate beliefs were also positively correlated with developmentally appropriate practices (r = .537). Developmentally appropriate beliefs were not correlated with inappropriate practices. Results were discussed with possible theoretical and practical implications for future research and teacher development. digital.library.unt.edu/ark:/67531/metadc278118/
Comparative Study of the Bel Canto Teaching Styles and their Effects on Vocal Agility
This thesis examines the historical significance of the vocal methods employed from the middle of the seventeenth century to the beginning of the nineteenth century in what became known as the bel canto era. It provides further exploration into the pedagogical procedures of the bel canto technique through a study of the premier instructors and singers from this period. The resurgence of interest in this tradition is addressed along with its impact on current vocal pedagogy. The vital role that vocal agility played as one of its most distinguishing traits is the primary factor under investigation. A discussion of the bel canto teaching styles in relation to their approach to agility is a major point of inquiry. By maintaining a link between present artists and pedagogues and the old Italian school, it helps the singer understand the historical implications of vocal agility as an integral part of healthy vocal development. digital.library.unt.edu/ark:/67531/metadc278170/
A Readership Survey of the Denton Record-Chronicle
The purposes of this study were to determine the characteristics of the subscribers to the local community newspaper, to determine what the subscribers read most and what they read the least in the local publication, and to determine the role of the small newspaper within the metropolitan area. digital.library.unt.edu/ark:/67531/metadc278732/
Women in Higher Education Administration: An Analysis for 1983-1998
The objective of this study was to identify if women have made statistically significant increases as top-level administrators in institutions of higher education during the period 1983-98. The research focused on the following areas: (1) Have women made significant increases as administrators during 1983-98? (2) Have women made significant increases in their proportion of total administrators during 1983-98 in the following areas: (a) comprehensive institutions, (b) doctoral institutions, (c) liberal arts institutions, and (d) research institutions? (3) Has the proportion of women administrators in private institutions increased significantly more than the proportion of women administrators in public institutions for 1983-98? digital.library.unt.edu/ark:/67531/metadc278718/
Sampling Plan for Incoming Material Inspection at Sanden
Sanden international, an automobile air conditioning compressor manufacturer, was facing a problem in its incoming material inspection procedures. Although the company had designed and was using its own sampling plan, some managers and supervisors where not confident of its reliability. Sanden recently established a goal for its total number of defects per supplier as one part per million. Achievement of this target required reviews of the existing sampling plan. The purpose of this project was to help Sandra identify the best alternatives for its incoming material inspection procedures. To do that considerations were made about the usefulness of sampling inspections, theoretical aspects of inspection sampling plans were examined, current sampling plans were analyzed and recommendations were made. digital.library.unt.edu/ark:/67531/metadc278774/
Political Culture in West and East Germany at the TIme of Reunification: Revisiting the Civic Culture
Studies of political culture have often focused on the impact of political institutions on political culture in a society. The scientific community has accepted the position that institutions shape beliefs and attitudes among the citizens towards the system they live in. This study tests this hypothesis by using survey data collected during the fall of 1990 in the United States, Great Britain, Italy, West, and East Germany. digital.library.unt.edu/ark:/67531/metadc278781/
Three-dimensional Information Space : An Exploration of a World Wide Web-based, Three-dimensional, Hierarchical Information Retrieval Interface Using Virtual Reality Modeling Language
This study examined the differences between a 3-D, VRML search interface, similar to Cone Trees, as a front-end to Yahoo on the World Wide Web and a conventional text-based, 1-Dinterface to the same database. The study sought to determine how quickly users could find information using both interfaces, their degree of satisfaction with both search interfaces, and which interface they preferred. digital.library.unt.edu/ark:/67531/metadc278715/
Jules Massenet's Musical Prosody Focusing on His Eight Song Cycles And A Collection, Expressions Lyriques: A Lecture Recital, Together with Recitals of Selected Works of W. A. Mozart, F. Schubert, C. Debussy, R. Strauss, D. Argento, V. Bellini, J. Marx, W. Walton, C. Gounod, A. Scarlatti, G. Fauré, J. Rodrigo, H. Wolf, and Others
Jules Massenet's mélodies feature a distinct vocal treatment regarding musical prosody through his eight song cycles, including Poëme d'Avril, Poëme Pastoral, Poëme du Souvenir, Poëme d'Amour, Poëme d'Hiver, Poëme d'un Soir, and Quelques Chansons Mauves, and a collection, Expressions Lyriques. These mélodies show the influence of the trend of salon music and the high-level poetry from the poetic movements of romanticism, Parnassianism, and symbolism. This study deals with Massenet's mélodies relating to the prosody idea, which is conspicuous in his vocal treatment. His melodic styles feature four distinct aspects of vocal treatment including lyrical, recitative or parlando, melodramatic, and déclamation rhythmée, and represent the idea of musical prosody of phonetic, syntactic, and semantic aspects. Massenet's other musical idioms such as harmony, form, and piano treatment, are also closely related to the prosody matter as a semantic aspect, reinforcing the poetic mood and content. In this study, each melodic style related to French versification is examined in detail. The musical analysis regarding the other musical idioms on selected examples presents the semantic feature of prosody idea. The brief review of French versification and opinions regarding the performance are included. Massenet's contribution to the genre of mélodie, with the prose melody and treatment of piano as an equal partner of voice line, is clearly demonstrated. With this contribution, Massenet should be recognized as the most influential composer to the climatic time of French mélodie led by Fauré, and Debussy, and Duparc. digital.library.unt.edu/ark:/67531/metadc2727/
The Stabat Mater of Herbert Howells: The Agony and the Ecstasy
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Herbert Howells composed three large works for chorus and orchestra: a requiem (Hymnus Paradisi), Latin mass (Missa Sabrinensis) and finally a Stabat Mater. Writings, performances and recordings of the Stabat Mater, however, have been few. As the Stabat Mater is believed to be the culmination of his musical prowess, it is important to bring this major work to light. Chapter 1 begins with a brief introduction to Herbert Howells, then continues as a brief biographical sketch. Howells's life is discussed from birth, as organ scholar, student at the Royal College of Music, his teaching professorship at the same institution, and important compositions by decade until his death. Chapter 2 is an overview of the Hymnus Paradisi and Missa Sabrinensis. The chapter gives historical information on each work, including reasons for commission, dates of composition and performance, orchestration and choral composition, type of soloists, conductor and recordings. Chapter 3 is an in depth study of the Stabat Mater. The chapter includes reasons for the genesis of the work, current and past events that affected the composition, musical influences, and the death of his son Michael Kendrick Howells. A second section to this chapter addresses the text of the Stabat Mater, including the history of the poem, liturgical use from the 11th century to the present, the rhythmic scheme of the poem, and variant stanzas used in the Howells's setting. Chapter 4 is a thorough musical analysis of the Stabat Mater. After a short introduction explaining the architecture of the work as a whole, each of seven movements is examined, including the introduction, main themes, musical elements and use of Latin text. A concluding final chapter restates the importance of Herbert Howells as a composer in the British musical renaissance of the 20th century, in addition to a supposition that this final large orchestral/choral work be considered the culmination of his life's work. digital.library.unt.edu/ark:/67531/metadc5791/
Riparian Forest Width and the Avian Community in a Greenbelt Corridor Setting
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The forest avian community of the Ray Roberts Greenbelt (Denton Co., Texas) was characterized for two years using point count station sampling, from fall 1998 to summer 2000. Richness data for both breeding seasons were correlated with two-spatial metrics: width of the riparian forest and distance to the nearest edge. There were significant correlations between forest interior species richness and both spatial metrics, for both breeding seasons. Based on these data, a minimum riparian forest width threshold of 400-meters is suggested to provide habitat for forest interior species, which have lost considerable habitat through forest fragmentation. Partners in Flight breeding bird priority concern scores were used to create a habitat priority index for the Trinity River bottomland hardwood forest system digital.library.unt.edu/ark:/67531/metadc2757/
A Qualitative Research Study of How Extended Field Experience Prepares Special Education Teachers of Students with Emotional and Behavioral Disorders
A well-prepared and qualified special education teacher is crucial to the performance of students with emotional and behavioral disorders (EBD). The prominent educators and federal government encourage the use of extended field experiences in preparing qualified special education teachers. The study examined the strengths and weaknesses of extended field experience in terms of the perceptions of the prospective teachers and teachers of students with EBD. Both individual interviews and a focus group were used to collect data. The results revealed that extended field experience benefits prospective teachers in showing the reality of the teachers' world, self-motivation assessment, and professional development. However, there were some improvements that could be made, including more placement selections and more practical knowledge. digital.library.unt.edu/ark:/67531/metadc5795/
Automated Low-cost Instrument for Measuring Total Column Ozone
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Networks of ground-based and satellite borne instruments to measure ultraviolet (UV) sunlight and total column ozone have greatly contributed to an understanding of increased amounts of UV reaching the surface of the Earth caused by stratospheric ozone depletion. Increased UV radiation has important potential effects on human health, and agricultural and ecological systems. Observations from these networks make it possible to monitor total ozone decreases and to predict ozone recovery trends due to global efforts to curb the use of products releasing chemicals harmful to the ozone layer. Thus, continued and expanded global monitoring of ozone and UV is needed. However, existing automatic stratospheric ozone monitors are complex and expensive instruments. The main objective of this research was the development of a low-cost fully automated total column ozone monitoring instrument which, because of its affordability, will increase the number of instruments available for ground-based observations. The new instrument is based on a high-resolution fiber optic spectrometer, coupled with fiber optics that are precisely aimed by a pan and tilt positioning mechanism and with controlling programs written in commonly available software platforms which run on a personal computer. This project makes use of novel low-cost fiber optic spectrometer technology. A cost advantage is gained over available units by placing one end of the fiber outdoors to collect sunlight and convey it indoors, thereby allowing the spectrometer and computer to be placed in a controlled environment. This reduces the cost of weatherproofing and thermal compensation. Cost savings also result from a simplified sun targeting system, because only a small pan and tilt device is required to aim the lightweight fiber optic ends. Precision sun-targeting algorithms, optical filter selection, and software to derive ozone from spectral measurements by the spectrometer are a major contribution of this project. This system is a flexible platform which may be adapted to study other atmospheric constituents such as sulfur dioxide, nitrous oxides, and haze. digital.library.unt.edu/ark:/67531/metadc5792/
Mechanical Properties of Polymer Modified Mortar
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The mechanical properties of the polymer-modified mortar are markedly improved over conventional cement mortar. We utilized recycled ABS in powder form and a polymer latex emulsion, polymer percentage ranges from 0 to 25 percent by polymer/cement ratio were investigated. The mechanical properties investigated were compression strength and adhesion strength. Compression strength effects did not have an impact on adhesion strength. Adhesion strength was calculated with pullout testing apparatus designed by the author. Results indicate that recycled ABS had a lower adhesive strength than the acrylic latex emulsion and the base mortar, but did increase in adhesive strength when mixed with maleic-anhydride. The adhesive strength was investigated for a Fiber Reinforced Polymer (FRP) made of an "E" glass fiber that is a continuous strand roving oriented and pre-tensioned longitudinally in an isopthalic polyester matrix material. The FRP rebar was compared to standard steel rebars, and found that the standard steel corrugated rebar had a higher adhesive strength, due to mechanical interlocking. This was clarified by measurements using a smooth steel rebar. Characterization of the polymer-modified mortar was conducted by pore analysis and scanning electron microscopy. Scanning Electron Microscopy was implemented to view the polymer particles, the cement fibrils formed by the hydration, and to prove Ohama's theory of network structure. digital.library.unt.edu/ark:/67531/metadc3173/
The impact of US-China relations on Taiwan's military spending (1966-1992).
Previous research has shown that Taiwan's military spending is affected either by China's military buildup or the US's military pipeline. This study investigates whether it is also true an ongoing US-China relationship has dynamic effects. Three major findings are obtained from the statistical analyses. First and foremost, the level of US-China conflict has a contemporaneous positive effect on Taiwan's military spending. Second, the analyses also indicate that the volatility of US-China relations has negative effects on Taiwan's military spending. This finding suggests that instability in US-China relations will prompt Taiwan to decrease its military spending due to a higher amount of perceived security on the one hand, and Taiwan wants to avoid further provoking China on the other. Third, analyses indicate that an error correction model fares better than a simple budgetary incremental model in explaining the re-equilibrating effects of GNP growth on Taiwan's military spending. Overall, the results demonstrate the interplay of domestic and international constraints and may help to predict what will be the expected military spending when Taiwan's economy changes. I suggest that Taiwan's military spending is likely to be influenced by US-China relations as well as by foreign investment and domestic economic constraints as long as the United States policy toward the Taiwan problem remains unchanged. digital.library.unt.edu/ark:/67531/metadc3100/
Kinetic Studies of Hydroxyl and Hydrogen Atom Reactions
Gas phase kinetics of the reactions involving hydroxyl radical and hydrogen atom were studied using experimental and ab initio theoretical techniques. The rate constant for the H + H2S reaction has been measured from 298 to 598 K by the laser photolysis/resonance fluorescence (LP-RF) technique. The transition state theory (TST) analysis coupled with the measurements support the suggestion that the reaction shows significant curvature in the Arrhenius plot. The LP-RF technique was also used to measure the rate constant of the H + CH3Br reaction over the temperature range 400-813 K. TST and density functional theory (DFT) calculations show that the dominant reaction channel is Br-abstraction. The reaction H + CF2=CF-CF=CF2 was first studied by flash photolysis/resonance fluorescence (FP-RF) method. The experiments of this work revealed distinctly non-Arrhenius behavior, which was interpreted in terms of a change in mechanism. DFT calculations suggest that the adduct is CF2H-CF•-CF=CF2. At lower temperatures a mixture of this molecule and CF2•-CFH-CF=CF2 is likely. The theoretical calculations show that H atom migrates in the fluoroethyl radicals through a bridging intermediate, and the barrier height for this process is lower in the less fluorinated ethyl radical. High level computations were also employed in studies of the rate constants of OH + chloroethylenes reactions. VTST calculations indicate that, except the reaction of OH + C2Cl4, these reactions present a complex behavior. For OH + C2Cl4, conventional TST calculation shows a simple positive temperature-dependence behavior. digital.library.unt.edu/ark:/67531/metadc3137/
The Use of Genetic Polymorphisms and Discriminant Analysis in Evaluating Genetic Polymorphisms as a Predictor of Population
Discriminant analysis is a procedure for identifying the relationships between qualitative criterion variables and quantitative predictor variables. Data bases of genetic polymorphisms are currently available that group such polymorphisms by ethnic origin or nationality. Such information could be useful to entities that base financial determinations upon predictions of disease or to medical researchers who wish to target prevention and treatment to population groups. While the use of genetic information to make such determinations is unlawful in states and confidentiality and privacy concerns abound, methods for human “redlining” may occur. Thus, it is necessary to investigate the efficacy of the relationship of certain genetic information to ethnicity to determine if a statistical analysis can provide information concerning such relationship. The use of the statistical technique of discriminant analysis provides a tool for examining such relationship. digital.library.unt.edu/ark:/67531/metadc3138/
Peter Lieberson's First Piano Concerto: A Buddhist-inspired poetic vision realized through twelve-tone language, other contemporary compositional techniques, together with three recitals of works by Bach, Chopin, Mozart, Albéniz, Grieg, Ginastera and Paderecki
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The main objective of this document is to explore the life and spiritual convictions of composer Peter Lieberson, and the creation of his Piano Concerto. Lieberson is a sought after composer who has won many awards and commissions. His works have been premiered and performed by some of the best musical artists of the late twentieth- and early twenty-first-century, such as Peter Serkin, Emmanuel Ax, Yo-Yo Ma, and Pierre Boulez. This study is divided into six chapters. After the Introduction, a biographical summary of Peter Lieberson's life, his spiritual beliefs and compositional style is presented. Chapter II contains background information on the Piano Concerto, along with biographical sketches of Peter Serkin, for whom the work was written, and Seiji Ozawa, music director of the Boston Symphony Orchestra and conductor of both the premier performance and Serkin's recording of the piece. Chapter III is a selective survey of the compositional techniques used in Lieberson's Concerto, in terms of the application of twelve-tone theory and the resulting octatonic, pentatonic, and whole-tone scales. Chapter IV introduces a general overview of the influence of Buddhism as a source of inspiration in the Piano Concerto. Chapter V examines aspects of performance practice issues. Chapter VI provides conclusions. The aim of this study is to further establish Peter Lieberson's stature as an important modern American composer. It is hoped that this study will encourage further research and interest in his works. digital.library.unt.edu/ark:/67531/metadc3175/
Southern Promise and Necessity: Texas, Regional Identity, and the National Woman Suffrage Movement, 1868-1920
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This study offers a concentrated view of how a national movement developed networks from the grassroots up and how regional identity can influence national campaign strategies by examining the roles Texas and Texans played in the woman suffrage movement in the United States. The interest that multiple generations of national woman suffrage leaders showed in Texas, from Reconstruction through the ratification of the Nineteenth Amendment, provides new insights into the reciprocal nature of national movements. Increasingly, from 1868 to 1920, a bilateral flow of resources existed between national women's rights leaders and woman suffrage activists in Texas. Additionally, this study nationalizes the woman suffrage movement earlier than previously thought. Cross-regional woman suffrage activity has been marginalized by the belief that campaigning in the South did not exist or had not connected with the national associations until the 1890s. This closer examination provides a different view. Early woman's rights leaders aimed at a nationwide movement from the beginning. This national goal included the South, and woman suffrage interest soon spread to the region. One of the major factors in this relationship was that the primarily northeastern-based national leadership desperately needed southern support to aid in their larger goals. Texas' ability to conform and make the congruity politically successful eventually helped the state become one of NAWSA's few southern stars. National leaders believed the state was of strategic importance because Texas activists continuously told them so by emphasizing their promotion of women's rights. Tremendously adding credibility to these claims was the sheer number of times Texas legislators introduced woman suffrage resolutions over the course of more than fifty years. This happened during at least thirteen sessions of the Texas legislature, including two of the three post-Civil War constitutional conventions. This larger pattern of interdependency often culminated in both sides-the Texas and national organizations-believing that the other was necessary for successful campaigning at the state, regional, and national levels. digital.library.unt.edu/ark:/67531/metadc31553/
Anxiety, Depression, and Sleep Disorders: Their Relationship and Reduction with Neurotherapy
This study investigated the relationship among anxiety, depression, and sleep disturbances and the treatment of these three disorders through neurotherapy. Research suggests that these conditions commonly co-occur in the general population and that central nervous system (CNS) arousal may play a primary role in the development and maintenance of these disorders. Several recent studies suggested that neurotherapy, a biofeedback-based treatment for CNS dysregulation, might be an effective treatment for comorbid conditions, particularly the ones of interest here, depression, anxiety, and sleep disturbances. This investigation used a clinical case-series design to assess pre/post neurotherapy changes on objective measures of anxiety, depression, and sleep and to determine whether changes in anxiety and depression then predict improvements in sleep quality. Data for 23 participants (10 males) were obtained from files of adults (Mage = 40.22 years, SD = 16.20) who received at least 15 neurotherapy sessions (M = 47.83 sessions, SD = 22.23) the University of North Texas Neurotherapy Lab. Matched pair t-tests revealed that symptoms of sleep disturbance, depression, and anxiety showed significant improvements following neurotherapy. Neurotherapy treatment effect sizes generally ranged from moderate to large (d = .414 - .849). Multiple regression analysis found that changes in self-reported anxiety symptoms, but not depressive symptoms, predicted observed improvements in sleep quality (adjusted R2 = .26). Last, the implications and limitations were discussed in relation to neurotherapy practice and the associated research. digital.library.unt.edu/ark:/67531/metadc31533/
La Primavera: Concertino for English Horn and Chamber Orchestra
La Primavera: Concertino for English Horn and Chamber Orchestra is a work in a traditional chamber orchestra instrumentation: single woodwinds (flute, oboe, clarinet, and bassoon), two French horns, trumpet, timpani and strings. A through-composed work of 14 minutes in duration, the Concertino is conceptually based on the idea that spring is not the first of the seasons, but rather the last. As a result, all of its motivic materials are organically linked to one another, and function as paired forces that struggle for supremacy. The introduction of the third motive functions as a motivic synthesis, since it contains intrinsic elements of previous motives. There are several important compositions based on the topic of the seasons among them we find: Vivaldi's Concerto Grosso Le Quatro Staggione, Haydn's oratorio The Seasons, and Piazzola's chamber work Las Estaciones. While researching this topic, the conceptual dilemma of spring as the last season was considered. This became a turning point in the compositional process strong enough to consider the spring as a singular topic of interest. The analysis of this work through Derrida's Deconstruction theory first came to me while reading Rose Rosengerd Subotnick's Deconstructive Variations: Music and Reason in Western Society. The Linguistic approach, was inspired in part by Leonard Bernstein's lecture “The Unanswered Question,” and Jean J. Nattiez's Music and Discourse: Toward a Semiology of Music. digital.library.unt.edu/ark:/67531/metadc3148/
Perceptions of Disaster Professionalism in Mexico: Adding a New Public Management Perspective to Emergency Management
This study investigated the perceptions of emergency managers regarding the degree of emergency management professionalism in Mexico and how it can be improved. The disaster of the Mexico City earthquake of 1985 was used as the starting point for this case study, as the prospects for more-frequent and more-intense disasters lend credence to the need for improved professionalism and, thus, effectiveness among emergency managers in the future. An expansive framework of emergency management professionalism mechanisms (or characteristics) and an additional compilation of new public management components (or values) were devised from the extant literatures found within the respective emergency management and public administration fields. The theory advanced by this study is that by integrating new public management components with emergency management mechanisms, professionalism in Mexico will improve and, thus, emergency managers will become more effective. ualitative field research was the methodology employed and it included interviews with 35 emergency managers in Mexico in corroboration with documentary evidence, to ascertain emergency managers' perceptions of professionalism in Mexico. The findings of this study determined that emergency managers in Mexico are implementing many of the mechanisms of professionalism but fewer new public management components. This study posits that by integrating new public management components with emergency management professionalism mechanisms, professionalism in Mexico will improve and will increase emergency managers' effectiveness. digital.library.unt.edu/ark:/67531/metadc31551/
Information Censorship: A Comparative Analysis of Newspaper Coverage of the Jyllands-Posten Editorial Caricatures in Cross-Cultural Settings
The identification and examination of cultural information strategies and censorship patterns used to propagate the controversial issue of the caricatures in two separate cultural contexts was the aim of this dissertation. It explored discourse used for the coverage of this topic by one newspaper in a restrictive information context and two newspapers in a liberal information context. Message propagation in a restrictive information environment was analyzed using the English daily Kuwait Times from the Middle East; the liberal information environment of the US was analyzed using two major dailies, the New York Times and the Philadelphia Inquirer. The study also concurrently identifies and elaborates on the themes and frames through which discourse was presented exposing the cultural ideologies and premises they represent. The topic was approached with an interdisciplinary position with the support and applicability testing of Chatman's insider-outsider theory within information science and Noelle-Neumann's spiral of silence theory and Herman and Chomsky's propaganda model based in the area of mass communication. The study has also presented a new model of information censorship - circle of information censorship, emphasizing conceptual issues that influence the selection and censorship of information. digital.library.unt.edu/ark:/67531/metadc31550/
Free Radical Chemistries at the Surface of Electronic Materials
The focus of the following research was to (1) understand the chemistry involved in nitriding an organosilicate glass substrate prior to tantalum deposition, as well as the effect nitrogen incorporation plays on subsequent tantalum deposition and (2) the reduction of a native oxide, the removal of surface contaminants, and the etching of a HgCdTe surface utilizing atomic hydrogen. These studies were investigated utilizing XPS, TEM and AFM. XPS data show that bombardment of an OSG substrate with NH3 and Ar ions results in the removal of carbon species and the incorporation of nitrogen into the surface. Tantalum deposition onto a nitrided OSG surface results in the initial formation of tantalum nitride with continued deposition resulting in the formation of tantalum. This process is a direct method for forming a thin TaN/Ta bilayer for use in micro- and nanoelectronic devices. Exposure to atomic hydrogen is shown to increase the surface roughness of both air exposed and etched samples. XPS results indicate that atomic hydrogen reduces tellurium oxide observed on air exposed samples via first-order kinetics. The removal of surface contaminants is an important step prior to continued device fabrication for optimum device performance. It is shown here that atomic hydrogen effectively removes adsorbed chlorine from the HgCdTe surface. digital.library.unt.edu/ark:/67531/metadc31552/
The Effects of Selective Serotonin Reuptake Inhibitors (SSRI) on Auditory Measures in Women
This study examined the relationship between selective serotonin reuptake inhibitor (SSRI) medication and auditory measures in clinically depressed women. Experimental subjects were tested in both a medicated and unmedicated condition. Experimental subjects were compared to a normal control group; additionally intrasubject comparison was made within the experimental group. Test measures included: audiometry, tympanometry, otoacoustic emissions, uncomfortable loudness level, masking level difference, SCAN-A, Synthetic Sentence Identification (SSI), and the low predictability section of the Revised Speech in noise (RSPIN). The unmedicated group scored significantly less favorably than the control group on the following tests; SCAN-A (composite, filtered words, and auditory figure ground), R-SPIN (0MCR condition in both the right and left ears). Additionally, the unmedicated group scored significantly less favorably than the medicated group on the SSI (-20MCR condition right ear only) and of the R-SPIN (0MCR condition right ear only). Other test measures indicated consistent trends but did reach significance. digital.library.unt.edu/ark:/67531/metadc3155/
An investigation of the current status of fund raising activities and training within student affairs divisions in Texas colleges and universities.
The primary focus of this study was to discover the depth of involvement with fundraising by student affairs professionals in Texas. It sought to determine the predominance of chief student affairs officers trained in development and the types of training that they received. Cooperation between student affairs divisions and development offices was also studied and whether there was a correlation between a cooperative relationship and the number of successful fundraising goals. This study includes a review of related literature on student affairs fundraising, a description of the methodology, results of the survey, conclusions, implications, and recommendations that may assist in future decision-making concerning future involvement in fundraising. The surveys were mailed to 149 four-year (public and private) institutions and two-year public institutions in Texas. The senior staff members of both the student affairs office and development office were asked to complete a survey. There was a 60.7% return rate consisting of responses from 72 development offices and 95 student affairs offices for a total of 167 usable responses. The study found that 59% of the student affairs officers had some formal training and/or on the job training. Involvement in fundraising was reported by 62.1% of the chief student affairs officers. Eighteen percent reported that they employed a development officer exclusively for student affairs fundraising, and another 30% had a development officer assigned to student affairs. Most development officers and student affairs officers perceived the other officer as cooperative rather than competitive in raising funds. Recommendations from this study include studying community college fundraising structures separately for more depth, conducting qualitative interviews with student affairs development officers, making a comparison of student affairs offices that have full-time development officers, and comparing the differences in fundraising success between development officers and chief student affairs officers. Recommendations for the professions include resource development training for student affairs officers and student affairs education for development officers. digital.library.unt.edu/ark:/67531/metadc3139/
Smoothing the information seeking path: Removing representational obstacles in the middle-school digital library.
Middle school student's interaction within a digital library is explored. Issues of interface features used, obstacles encountered, search strategies and search techniques used, and representation obstacles are examined. A mechanism for evaluating user's descriptors is tested and effects of augmenting the system's resource descriptions with these descriptors on retrieval is explored. Transaction log data analysis (TLA) was used, with external corroborating achievement data provided by teachers. Analysis was conducted using quantitative and qualitative methods. Coding schemes for the failure analysis, search strategies and techniques analysis, as well as extent of match analysis between terms in student's questions and their search terms, and extent of match analysis between search terms and controlled vocabulary were developed. There are five chapters with twelve supporting appendixes. Chapter One presents an introduction to the problem and reviews the pilot study. Chapter Two presents the literature review and theoretical basis for the study. Chapter Three describes the research questions, hypotheses and methods. Chapter Four presents findings. Chapter Five presents a summary of the findings and their support of the hypotheses. Unanticipated findings, limitations, speculations, and areas of further research are indicated. Findings indicate that middle school users interact with the system in various sequences of patterns. User groups' interactions and scaffold use are influenced by the teacher's objectives for using the ADL. Users preferred to use single word searches over Boolean, phrase or natural language searches. Users tended to use a strategy of repeating the same exact search, instead of using the advanced scaffolds. A high percent of users attempted at least one search that included spelling or typographical errors, punctuation, or sequentially repeated searches. Search terms matched the DQ's in some instantiation 54% of all searches. Terms used by the system to represent the resources do not adequately represent the user groups' information needs, however, using student generated keywords to augment resource descriptions can have a positive effect on retrieval. digital.library.unt.edu/ark:/67531/metadc3165/
Lucca in the Signoria of Paolo Guinigi, 1400-1430
This study analyzes the once great medieval Tuscan capital of Lucca's struggle for survival at the beginning of the fifteenth century. This was the age of the rise of regional states in Italy, and the expansionistic aims of Milan, Florence and others were a constant challenge to city-states such as Lucca which desired a political and cultural status quo. Yet, it was a challenge that was successfully met; unlike Pisa, Siena, Perugia, and various other major Tuscan cities, Lucca did not succumb to Milanese or Florentine aggression in the early Quattrocento. Why it did not is a major topic of discussion here. One of the means in which the Lucchese faced the new political and military realities of the time was the establishment of a monarchial system of government in the signoria of Paolo Guinigi (r. 1400-1430). The Guinigi Signoria was not characterized by the use of intimidation and violence, but rather by clientage, kinship and neighborhood bonds, marriage alliances, and the general consent of the people. Paolo garnered the consent of the people at first because his wealth allowed him to protect Lucca and its contado to a greater extent than would have been possible otherwise, and because of his family's long ties with the powerful Visconti of Milan; he held it later because he provided the city-state with capable leadership. This study extends the evidence of recent scholars that every Italian Renaissance city was unique based on its particular geography, alliances, civic wealth, and a number of other factors. Lucca in the period of Paolo Guinigi, a monarchy in the setting of one of the traditionally most republican cities of Italy, provides a most interesting example. “Civic humanism,” for example, has a decidedly different slant in Lucca than elsewhere, and is best exemplified in the figure of Giovanni Sercambi. This study also provides new perspectives from which to view Florence and Milan during the period of “crisis” at the beginning of the fifteenth century, and thus contributes to the mass of scholarship concerning the Baron thesis. digital.library.unt.edu/ark:/67531/metadc3134/
A Computational Study on 18+δ Organometallics
The B3LYP density functional has been used to calculate properties of organometallic complexes of Co(CO)3 and ReBr(CO)3, with the chelating ligand 2,3-bisphosphinomaleic anhydride, in 19- and 18-electron forms. The SBKJC-21G effective core potential and associated basis set was used for metals (Co/Re) and the 6-31G* basis set was used for all other elements. The differences of bond angles, bond distances, natural atomic charges and IR vibrational frequencies were compared with the available experimental parameters. The differences between the 19- and 18-electron systems have been analyzed. The results reveal that the 19th electron is mostly distributed over the ligand of 2,3-bisphosphinomaleic anhydride, although partially localized onto the metal fragment in 1 and 2*. Two different methods, IR-frequencies and natural atomic charges, were used to determine the value of δ. Present computed values of δ are compared with available experimental values, and predictions are made for unknown complexes. digital.library.unt.edu/ark:/67531/metadc3101/
Establishing the utility of a classroom effectiveness index as a teacher accountability system.
How to identify effective teachers who improve student achievement despite diverse student populations and school contexts is an ongoing discussion in public education. The need to show communities and parents how well teachers and schools improve student learning has led districts and states to seek a fair, equitable and valid measure of student growth using student achievement. This study investigated a two stage hierarchical model for estimating teacher effect on student achievement. This measure was entitled a Classroom Effectiveness Index (CEI). Consistency of this model over time, outlier influences in individual CEIs, variance among CEIs across four years, and correlations of second stage student residuals with first stage student residuals were analyzed. The statistical analysis used four years of student residual data from a state-mandated mathematics assessment (n=7086) and a state-mandated reading assessment (n=7572) aggregated by teacher. The study identified the following results. Four years of district grand slopes and grand intercepts were analyzed to show consistent results over time. Repeated measures analyses of grand slopes and intercepts in mathematics were statistically significant at the .01 level. Repeated measures analyses of grand slopes and intercepts in reading were not statistically significant. The analyses indicated consistent results over time for reading but not for mathematics. Data were analyzed to assess outlier effects. Nineteen statistically significant outliers in 15,378 student residuals were identified. However, the impact on individual teachers was extreme in eight of the 19 cases. Further study is indicated. Subsets of teachers in the same assignment at the same school for four consecutive years and for three consecutive years indicated CEIs were stable over time. There were no statistically significant differences in either mathematics or reading. Correlations between Level One student residuals and HLM residuals were statistically significant in reading and in mathematics. This implied that the second stage of the model was consistent for all students. Much is still unknown concerning teacher effect on student achievement, especially when confined to teacher activity within one school year. However, results indicate the utility of using statistical modeling of student achievement within the context of teacher accountability. digital.library.unt.edu/ark:/67531/metadc3161/
Paul Hindemith's Septet (1948): A Look Back to Neue Sachlichkeit
In the early 1920s, Gustav Friedrich Hartlaub created a fine arts movement that began in Weimar, Germany, which questioned artistic Expressionism. In 1923, he formed an art exhibition to display new art works of simplicity that were of his anti-Expressionist goal. This exhibition was termed Neue Sachlichkeit, or New Objectivity, and quickly became associated with all fine arts. Music of Neue Sachlichkeit ideals during the 1920s and 1930s began to exhibit anti-Expressionist concepts of form, neoclassicism and limited instrumentation. Paul Hindemith was among the leading figures of Neue Sachlichkeit music. Although Paul Hindemith's Septet (1948) was composed during his later career, it shows many Neue Sachlichkeit traits found previously in the 1920s and 1930s. Characteristics of limited/mixed instrumentation, neoclassic instrumentation and form, and Baroque counterpoint are found in the Septet. These traits can also be head in earlier Neue Sachlichkeit pieces by Hindemith such as Hin und zuruck, op. 45a (1927), Das Marienleben (1922/23, rev. 1948) and Neues vom Tage (1929). Chapter 2 examines the Neue Sachlichkeit movement within the fine arts. Chapter 3 gives a brief biography of Paul Hindemith with a concentration on his influence of Neue Sachlichkeit music of the 1920s and 1930s. This chapter also relates this period of Hindemith's earlier career with his techniques used in later works, such as the Septet. Chapter 4 discusses how the Septet directly relates to the Neue Sachlichkeit fine arts movement. Chapter 5 gives a general analysis of the Septet. This analysis provides the reader with an understanding of the forms and tonal relationships used in the Septet. This summarizes the neoclassicism of the Septet and shows traits of Neue Sachlichkeit. Chapter 6 concludes with an examination of the mixed instrumentation of the Septet. digital.library.unt.edu/ark:/67531/metadc31545/
Free Radical Induced Oxidation, Reduction and Metallization of NiSi and Ni(Pt)Si Surfaces
NiSi and Ni(Pt)Si, and of the effects of dissociated ammonia on oxide reduction was carried out under controlled ultrahigh vacuum (UHV) conditions. X-ray photoelectron spectroscopy (XPS) has been used to characterize the evolution of surface composition. Vicinal surfaces on NiSi and Ni(Pt)Si were formed in UHV by a combination of Ar+ sputtering and thermal annealing. Oxidation of these surfaces in the presence of either O+O2 or pure O2 at room temperature results in the initial formation of a SiO2 layer ~ 7 Å thick. Subsequent exposure to O2 yields no further oxidation. Continued exposure to O+O2, however, results in rapid silicon consumption and, at higher exposures, the kinetically-driven oxidation of the transition metal(s), with oxides >35&#506; thick formed on all samples, without passivation. The addition of Pt retards but does not eliminate oxide growth or Ni oxidation. At higher exposures, in Ni(Pt)Si surface the kinetically-limited oxidation of Pt results in Pt silicate formation. Substrate dopant type has almost no effect on oxidation rate. Reduction of the silicon oxide/metal silicate is carried out by reacting with dissociated NH3 at room temperature. The reduction from dissociated ammonia (NHx+H) on silicon oxide/ metal silicate layer shows selective reduction of the metal oxide/silicate layer, but does not react with SiO2 at ambient temperature. digital.library.unt.edu/ark:/67531/metadc31542/
"I Speak, Therefore I Am:" Identity and Self-Construction as Motivation to Engage in Electronic Word of Mouth
To paraphrase an old bromide, "you are what you consume." Consumers derive their sense of self through products, brands, performances and a host of other meaning-laden materials that they consume. The marketing literature has long recognized possessions as an extension of the self-concept. Although hundreds of studies have examined the linkage between consumption and the self, surprisingly few have examined a related phenomenon - the relationship between the self-concept and word of mouth (WOM). A handful of studies have demonstrated the use of WOM to enhance the consumer's self-image, but most extant research focuses on how the act of engaging in WOM is used to build the self-concept. To date there has not been an extensive examination of the process by which WOM transfers the meaning of a product, brand, advertisement or narrative from one consumer to another as part of identity construction. This dissertation attempts to answer the following research questions: 1. Do self-concept and identity motivate consumers to engage in electronic word-of-mouth (eWOM)? 2. Is there a conceptual model to represent the effects of message characteristics, product/brand characteristics and individual personality differences on the self-enhancement value of eWOM and resulting eWOM behaviors? A conceptual model was proposed and, using an experimental research design, hypotheses were tested using structural equation modeling (SEM). The results suggest that self-concept and identity indeed motivate consumers to engage in eWOM, and a number of brand and message traits comprise eWOM's self-enhancement value. This dissertation both contributes to the theoretical understanding of eWOM and assists managers in developing marketing strategy. The use of WOM for identity construction remains an understudied area in marketing when compared to the consumption of products as self-expression. This research provides suggestions for practitioners in harnessing the potential of eWOM as a marketing strategy through message development and targeting of lucrative segments with viral campaigns. digital.library.unt.edu/ark:/67531/metadc31549/