John Harbison's The Flight into Egypt: An Analysis for Performance (open access)

John Harbison's The Flight into Egypt: An Analysis for Performance

John Harbison's status as a significant contemporary American composer is confirmed by his numerous appointments, honorary degrees, and awards. He is the recipient of nearly every major composition award, with works performed by major orchestras and in important opera houses spanning the world. This paper examines in detail Harbison's most acclaimed choral work, the 1987 Pulitzer Prize-winning The Flight into Egypt. This study of the score is a "conductor's analysis," offering a musical guide for the conductor who seeks to perform this work. To provide a context for the discussion, Chapter 1 offers a brief biographical sketch of Harbison's life and career. Chapter 2 provides the analysis of the work and includes a history from commission to premier, a discussion of Harbison's selection of text, and an examination of the pitch organization which informs the piece. In Chapter 3, I present important rehearsal and performance implications to consider when undertaking a performance of the work. Interviews with two well-regarded conductors who have performed The Flight into Egypt, David Hoose and Patrick Gardner, and the composer himself, provide valuable insight into this discourse.
Date: May 2008
Creator: Galante, Brian Edward, 1974-
System: The UNT Digital Library
A Comparative Analysis of the Effectiveness of Three Different GED Preparation Programs (open access)

A Comparative Analysis of the Effectiveness of Three Different GED Preparation Programs

The purpose of this study was to identify effective instructional programs for GED tests preparation for students in a large suburban school district. Three different nonrandom, unequal naturally occurring instructional groups at three different locations were examined. One group participated in a traditional instruction program, a second group in a test/retest program, and a third group in a computer-assisted program. The demographics of the district population, the GED population, and the individual study groups were catalogued and analyzed. The demographics of the GED population were similar to the district population but different from the GED passers. Student characteristics did affect GED success. Both quantitative and qualitative data were gathered. Random students in each of the three groups were interviewed about their experiences in GED preparation using a questionnaire. Quantitative data were analyzed using frequencies, means, correlations, and a multiple regression analysis. Since the GED credential is an alternative to the high school diploma, its use as a dropout alternative is important to every school district. The study found that instructional methods had little impact on students' success in receiving the GED credential. The overall success rate of students was low in each group. The student's reading achievement score, GPA, and …
Date: May 2001
Creator: Gardner, Marlene K.
System: The UNT Digital Library
Experiencing the interdependent nature of musicianship and educatorship as defined by David J. Elliott in the context of the collegiate level vocal jazz ensemble. (open access)

Experiencing the interdependent nature of musicianship and educatorship as defined by David J. Elliott in the context of the collegiate level vocal jazz ensemble.

Examination of the relationship of musicianship and educatorship of teacher and students as interacting partners in a specific musical context proceeded with investigation of how formal, informal, impressionistic, and supervisory musical and educational knowledge were evidenced in rehearsal. Attention was also given to how the teaching strategies of modeling, coaching, scaffolding, fading, articulating, reflecting comparatively, and exploring were used to develop student musicianship. The research methodology may best be described as an inductive analytical case study approach. Multiple data sources included: videotaped observations of 19 bi-weekly rehearsals, audio taped interviews of the 12 participants, supplemental materials, (a published interview, journal articles, rehearsal schedules), and member checking with the teacher and David Elliott. Rehearsal data were initially organized into categories identified in David J. Elliott's (1995) model. The relationship of teacher and student musicianship, and teacher educatorship emerged during analysis. Musical details of problem finding, reducing and solving were also identified. Three themes emerged from the student interviews: their perceptions of the teacher's musicianship, general rehearsal strategies, and the teacher's use of specific teaching strategies. Interviews with the teacher illuminated his perception of musicianship and teaching strategies employed in the context. The findings confirmed that as music making transpired in the …
Date: August 2005
Creator: Jensen-Hole, Catherine
System: The UNT Digital Library
Authentic Transformational Leadership and Implicit Leadership Theories. (open access)

Authentic Transformational Leadership and Implicit Leadership Theories.

Transformational leadership describes a leader who motivates followers to performance beyond expectations, but it has often been attacked for its potential to be abused. A newer form of leadership has been proposed, that of authentic leadership. Authentic leadership is an over-arching concept that proposes to include transformational leadership and all positive forms of leadership. At the heart of authentic leadership is the concept of ethicality. The concept of authenticity may contribute to the transformational leadership paradigm, producing an ideal form of leadership. Authentic leadership may not be an over-arching form of leadership, but one suited particularly to transformational leadership. I propose that authentic transformational leadership resides in leaders' and followers' implicit leadership theories. This experiment addresses authentic transformational leadership and the role of implicit leadership theories in directing leader behavior. A model is developed that outlines the relationship between authentic transformational leadership and implicit leadership theories, including the separate implicit theories of leader and follower, leader-member exchange (LMX), and leader effectiveness. Hypotheses concerning these relationships are developed. The study is experimental, using WebCT as a delivery tool. Scenario-based surveys were developed to collect data, using both known measures and measures developed specifically for this experiment. Two pilot studies were conducted …
Date: August 2008
Creator: Nichols, Thomas W.
System: The UNT Digital Library
Ecotoxicological Investigations in Effluent-Dominated Stream Mesocosms (open access)

Ecotoxicological Investigations in Effluent-Dominated Stream Mesocosms

The University of North Texas Stream Research Facility (UNTSRF) was designed to examine contaminant impacts on effluent-dominated stream ecosystems. Stream mesocosms, fed municipal effluent from the City of Denton, TX, Pecan Creek Water Reclamation Plant (PCWRP), were treated with 0, 15 or 140 µg/L cadmium for a 10-day study in August 2000. Laboratory toxicity test and stream macroinvertebrate responses indicated that cadmium bioavailability was reduced by constituents of effluent-dominated streams. The Biotic Ligand Model (BLM) for Cd was used to predict a 48 hour Cd EC50 for Ceriodaphnia dubia of 280 µg/L in these effluent-dominated streams. This value is higher that an EC50 of 38.3 µg/L Cd and a 7-day reproduction effect level of 3.3 µg/L Cd generated for C. dubia in reconstituted laboratory hard water. These results support use of a cadmium BLM for establishing site-specific acute water quality criteria in effluent-dominated streams. Although not affected by 15 µg/L treatments, organisms accumulated Cd in 15 µg/L treated streams. Hence, over longer exposure periods, Cd accumulation may increase and a no effect level may be lower than the observed 10-day no effect level of 15 µg/L. A toxicity identification evaluation procedure was utilized with in vitro and in vivo bioassays …
Date: December 2002
Creator: Brooks, Bryan W.
System: The UNT Digital Library
A Comparison of Quantitative Skills in Texas Year-round Schools with Texas Traditional Calendar Schools (open access)

A Comparison of Quantitative Skills in Texas Year-round Schools with Texas Traditional Calendar Schools

This study analyzed the academic impact of year-round calendar schools as compared with the academic achievement of traditional calendar schools. The population studied was the 1998 public elementary schools in Texas. The academic impact was based upon the 1998 Texas Assessment of Academic Skills (TAAS) test administrated by the Texas Education Agency. The two groups of schools studied were Texas elementary schools that were on a year-round calendar schedule, and the Texas elementary schools on a traditional calendar schedule. Multiple regression statistics were used, in addition to means, and differences between the means of variables. Year-round schools (YRE), when compared to the means of traditional schools, have means lower in math scores (6.16 percent) than traditional schools. Year-round schools have fewer African Americans students (2.78%), White students (21.06%), and special education students (.25%). Year-round schools are higher in population size (72.72students), Economic Disadvantaged students (15.87%), Hispanic students (23.46%), and Mobility (3.23%).
Date: May 2001
Creator: Cole, Homer W.
System: The UNT Digital Library
Opening the Door to Meaning-Making in Secondary Art History Instruction (open access)

Opening the Door to Meaning-Making in Secondary Art History Instruction

Each day countless numbers of high school students remain standing at the threshold of the door to meaningful learning in art history because of traditional authoritative instructional methods and content. With the keys of feminist pedagogy, interactive teaching methods, and the new art histories, the teacher can now unlock that door and lead students to personally relevant learning on the other side. A case study using both qualitative and quantitative research methods was conducted in a secondary art history classroom to examine the teacher's pedagogical choices and the degree to which they enable meaningful and relevant student learning. The analysis of multiple sources of data, including classroom observations, revealed statistically significant correlations between the teacher's instructional methods and the content, as well as their impact on student meaning-making.
Date: May 2006
Creator: Stroud, Elizabeth J.
System: The UNT Digital Library
Integration of field-based analysis of plant community dynamics with quantitative analysis of landscape change in the Ray Roberts Lake area, 1987—1997 (open access)

Integration of field-based analysis of plant community dynamics with quantitative analysis of landscape change in the Ray Roberts Lake area, 1987—1997

This study focused on the effectiveness of integrating traditional plant community analyses with landscape ecological analyses based on remotely sensed data. A temporal analysis of plant community diversity was conducted for major plant communities of the Ray Roberts Lake area using transect monitoring data collected between 1987 and 1997. Landscape analyses were performed with FRAGSTATS*ARC using classified SPOT satellite imagery for 1987 and 1997. Although the methodology developed in this work was exploratory, it was found that characterizing the dynamics of major plant communities in the study area produced a more effective and insightful analysis of Ray Roberts Lake area landscape dynamics.
Date: May 2000
Creator: McDonough, Theresa J.
System: The UNT Digital Library
Family Rituals and Resilience: Relationship Among Measures of Religiosity, Openness to Experience, and Trait Anxiety (open access)

Family Rituals and Resilience: Relationship Among Measures of Religiosity, Openness to Experience, and Trait Anxiety

Rituals are an integral part of society. The focus of research on rituals has been shifting to highlight the effect rituals may produce on individual resilience and ability to function. This study examined the relationships between participation in family rituals and several conceptually related facets of the human experience, including religiosity, openness to experience, and anxiety. Participants responded to questions on an assessment instrument (Family Ritual Questionnaire) designed to measure participation in a broad variety of identified family rituals; they were grouped according to responses on that questionnaire, and the resulting groups were compared on their responses to questionnaires addressing religiosity (Religious Background and Behavior Questionnaire), openness to experience (Revised NEO Personality Inventory Openness to Experiences scale), and anxiety (State-Trait Anxiety Inventory). The four-group classification system did not produce significant differences on measures of religiosity, openness to experience, or trait anxiety. Nor were there any significant differences noted when the groups were examined on the basis of the demographic characteristics of age, gender, separation time from family of origin, or academic status. The demographic descriptive which was associated with specific group differences related to adult composition of family of origin: participants described the adults present in their families of origin, …
Date: August 2000
Creator: Emmett, Gloria J.
System: The UNT Digital Library
Passionate transformation in vernicle images. (open access)

Passionate transformation in vernicle images.

This thesis will examine the iconography of late-thirteenth- through fifteenth-century images of St. Veronica's veil, also known as vernicles. In the late Middle Ages, vernicle iconography changed from iconic representations of Christ's face toward graphic imagery of Christ's suffering during his Passion. These passionate transformations, as I have called them, were affected by the Roman Sudarium relic, popular devotion to Christ's suffering and humanity during his Passion, and the Catholic ritual of Mass. This thesis will consider how the function of vernicle images during Mass was reflected in their iconography throughout Europe between 1250 and 1500.
Date: December 2004
Creator: Hoffman, J. Starr
System: The UNT Digital Library

The Stabat Mater of Herbert Howells: The Agony and the Ecstasy

Access: Use of this item is restricted to the UNT Community
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 …
Date: August 2006
Creator: Childs, Kim J.
System: The UNT Digital Library
Human Rights and the Strategic Use of US Foreign Food Aid (open access)

Human Rights and the Strategic Use of US Foreign Food Aid

How does respect for human rights affect the disbursement of food aid by US foreign policymakers? Scholars analyzing foreign aid generally look at only total economic aid, military aid or a combination of both. However, for a more nuanced understanding of human rights as a determinant of foreign aid, the discrete foreign aid programs must be examined. By disentangling component-programs from total aid, this analysis demonstrates how human rights influence policymakers by allowing them to distribute food aid to human rights abusing countries. Consequently, policymakers can promote strategic objectives with food aid, while legally restricted from distributing other aid. The primary theoretical argument, which links increasing human rights abuse with increasing food aid, is supported by results from a Heckman model. This procedure models the two-stage decision-making process where foreign policymakers first, select countries for aid and then, distribute aid to those selected.
Date: December 2007
Creator: Fariss, Christopher J.
System: The UNT Digital Library

The Solo Compositions for Trumpet of Fisher Aubrey Tull: An Analysis of Structural, Technical, and Stylistic Elements for Performance Preparation, with Three Recitals of Selected Works by Bozza, Fasch, Haydn, Tomasi, and Others

Access: Use of this item is restricted to the UNT Community
The compositions of Fisher Aubrey Tull are widely performed and many have become standard repertoire. Tull's compositions encompass a multiplicity of performance media including works for orchestra, chorus, symphonic band, jazz band, brass choir, and solo and chamber works. Tull's compositional output for the trumpet is prolific and is acknowledged to be music of high quality. An examination of Trumpet and Brass Programs, compiled and published annually by the International Trumpet Guild, shows Tull's solo and ensemble works for trumpet to be frequently performed. Furthermore, his compositions for trumpet have been performed and recorded by internationally acclaimed artists including Vincent DiMartino, Terry Everson, Håkan Hardenberger, Anthony Plog, Carl "Doc" Severinsen and Allen Vizzutti.This study investigates Fisher Tull's eight solo works for trumpet, which include: Vignette for Trumpet and Piano (1954); Concerto No. 1 for Trumpet and Orchestra (1964); Concerto No. 2 for Trumpet and Band (1974); Three Bagatelles for Trumpet and Piano (1975); Eight Profiles for Solo Trumpet (1978); Rhapsody for Trumpet and Band (1980); Sonata for Trumpet and Piano (1986); and Chromutations for Solo Trumpet (1988). Histories of each composition are chronicled. An analysis of formal organization and significant style features examines musical structure, harmonic language, rhythmic character, instrumentation, …
Date: August 2002
Creator: Wenger, Alan J.
System: The UNT Digital Library
An Evaluation of the Effects of Two Different Role Play Formats on the Outcomes of a Parent Training Curriculum (open access)

An Evaluation of the Effects of Two Different Role Play Formats on the Outcomes of a Parent Training Curriculum

The current study was designed to replicate and extend previous research on the effectiveness of behavioral parent training. Specifically, the effectiveness of the Behavior Management and Parenting Services (BMAPS) curriculum in teaching parents to exhibit a set of parenting skills and respond accurately to a multiple choice examination about positive parenting techniques was evaluated. In addition, the curriculum was revised so that the relative effectiveness and acceptability of two role play formats could be assessed. The outcomes of the study showed an improvement in the participants' ability to identify correct answers on a multiple choice examination and apply the parenting skills taught in class within a role play format; results pertaining to the efficacy of each role play format were less conclusive.
Date: December 2009
Creator: Carlson Litscher, Barbara J.
System: The UNT Digital Library
History and Current State of Performance of the Literature for Solo Trombone and Organ (open access)

History and Current State of Performance of the Literature for Solo Trombone and Organ

More than 200 compositions have been written for solo trombone and organ since the nineteenth century, including contributions from notable composers such as Franz Liszt, Gustav Holst, Gardner Read, Petr Eben, and Jan Koetsier. This repertoire represents a significant part of the solo literature for the trombone, but it is largely unknown to both trombonists and organists. The purpose of this document is to provide a historical perspective of this literature from the nineteenth century to the present, to compile a complete bibliography of compositions for trombone and organ, and to determine the current state of performance of this repertoire. This current state of performance has been determined through an internet survey, a study of recital programs printed in the ITA Journal, a study of recordings of this literature, and interviews and correspondence with well-known performers of these compositions. It is the intention of this author that this document will serve to make the repertoire for trombone and organ more accessible and more widely known to both trombonists and organists.
Date: August 2008
Creator: Pinson, Jr., Donald Lynn
System: The UNT Digital Library
Problem-oriented approach to criminal investigation: implementation issues and challenges (open access)

Problem-oriented approach to criminal investigation: implementation issues and challenges

As a proactive, information-based policing approach, problem-oriented policing emphasizes the use of crime analysis techniques in the analysis of the underlying causes of the problems that police deal with. In particular, analysis applications can be powerful tools for criminal investigation, such as crime reconstruction, profiling, IAFIS, VICAP, and CODIS. The SARA Model represents a problem-solving strategy of problemoriented policing. It aims to address the underlying causes of the problems and create substantial solutions. However, implementing problem-oriented policing requires a significant change in both the philosophy and structure of police agencies. Not only American policing but also the Turkish National Police should consider problem-oriented policing as an alternative approach for solving criminal activities.
Date: August 2001
Creator: Ozeren, Suleyman
System: The UNT Digital Library
An Assessment of the Parent Orientation Program at the University of North Texas (open access)

An Assessment of the Parent Orientation Program at the University of North Texas

Although most institutions offer a parent program option to the orientation program, there has been little formalized research into the quality, planning or programming of parent orientation. There has been very little research into the impact parent orientation has on parents and whether or not they feel that such programs have met their needs, particularly by gender, minority status, educational background, or by geographic distance from the institution. This study seeks to determine the effectiveness of the parent orientation program at the University of North Texas to the parents who participate in this program. The study attempts to measure whether parents feel that they have adequate information about the institution to adequately support their student through the college transition; if parents feel welcomed by the UNT campus community; and if they feel that they have developed resources and institutional contacts that may be useful in the future in assisting their child to have a successful college experience at UNT. The study, conducted in the summer of 2002, had 736 respondents. An instrument developed to determine parent's perceptions of the effectiveness of the parent orientation program consisted of 31 questions using a Likert scale. A t-Test was utilized to analyze the …
Date: December 2002
Creator: With, Elizabeth
System: The UNT Digital Library
Perceptions of Faculty Development:  A Study of a North Texas Community College (open access)

Perceptions of Faculty Development: A Study of a North Texas Community College

This dissertation study deems faculty development critical to meeting challenges associated with retirement, potential professor shortages, increasing adjunct populations, unprepared faculty, and accreditation standards in the community college. The study centers on seeking a current, in-depth understanding of faculty development at Metro Community College (a pseudonym). The participants in this qualitative study consisted of adjunct and full-time faculty members and administrators who communicated their perceptions of faculty development. The analysis discovered faculty member types (progressive and hobbyist adjunct and proactive, active, and reactive full-time faculty) who invest themselves in development differently depending on their position and inclination to participate. Faculty members generally indicated a desire for collegiality and collaboration, self-direction, and individualized approaches to development whereas administrators exhibited a greater interest in meeting accreditation standards and ensuring institutional recognition. The study also discovered a need to consider development initiatives for adjunct faculty members. The dissertation proposes an improved partnership between the adjunct and full-time faculty and the administration.
Date: December 2008
Creator: Bodily, Brett Hogan
System: The UNT Digital Library
Dna Profiling of Captive Roseate Spoonbill (Ajaia Ajaja) Populations As a Mechanism of Determining Lineage in Colonial Nesting Birds. (open access)

Dna Profiling of Captive Roseate Spoonbill (Ajaia Ajaja) Populations As a Mechanism of Determining Lineage in Colonial Nesting Birds.

Roseate spoonbills are colonial nesting birds with breeding grounds extending from the United States Gulf coast to the pampas of Argentina. The U.S. population suffered a severe bottleneck from 1890 to 1920. The population's recovery was slow and partially credited to migrations from Mexican rookeries, but a gene pool reduction would be expected. Five polymorphic Spoonbill autosomal short tandem repeat (STR) loci [three (GAT)n, one (AAAG)n and one (GT)n] and one Z/W-linked microsatellite exhibiting sex-specific dimorphism were isolated and characterized. The Z/W-linked STR locus accurately confirmed the sex of each bird. Allelic profiles for 51 spoonbills obtained from Dallas (Texas), Fort Worth (Texas) and Sedgwick County (Kansas) zoos revealed a non-continuous distribution of allele frequencies, consistent with the effects of a population bottleneck. Allelic frequencies also differed significantly between the isolated zoo populations. Although extra-pair copulations were suspected and difficult to document, zoos commonly used observational studies of mating pairs to determine familial relationships among adults and offspring. STR parentage analysis of recorded family relationships excluded one or both parents in 10/25 cases studied and it was further possible to identify alternative likely parents in each case. Mistaken familial relationships quickly lead to the loss of genetic variability in captive …
Date: May 2002
Creator: Sawyer, Gregory M.
System: The UNT Digital Library
The Correctional Orientation of Juvenile Facility Directors (open access)

The Correctional Orientation of Juvenile Facility Directors

Over the last 30 years, the juvenile justice system and juvenile correctional ideology shifted to become more punitive in nature. However, studies examining this shift are lacking in the literature. The present study will attempt to assess what correctional ideology, rehabilitative or punitive, is dominant within juvenile corrections by conducting a national survey to juvenile facility directors. This study will be based on prior literature, most of which has focused upon line staff in an adult correctional setting. From this prior literature, more specifically from the work of Cullen et al. (1989), scales will be created to determine the correctional orientation of the key administrators in juvenile facilities. This will allow us to assess whether the correctional ideology driving the juvenile system has in fact become punitive. The findings from this study have the opportunity to alter the current status quo in juvenile corrections.
Date: August 2001
Creator: Sifuentes-Hammer, Amy
System: The UNT Digital Library
Individual attachment styles and the correspondence/compensation hypotheses in relation to depression and depressive experiences. (open access)

Individual attachment styles and the correspondence/compensation hypotheses in relation to depression and depressive experiences.

Two hundred twenty individuals participated in the present study from a university population. The study examined the relationship among attachment styles to caregivers, relationship with God, depressive symptomology, and depressive experiences. Attachment theorists have suggested a connection between childhood attachment to caregivers and current attachment to God through the idea that individuals have "working models" that form how they interpret present relationships. For the most part, the results of the current study supported the idea of correspondence between attachment to caregiver and attachment to God. Individual attachment styles to caregivers matched their attachment style to God. However, when caregiver religiousness was included as a moderating variable, results supported the theory of combined compensation-correspondence for those with insecure attachments to caregivers. Individuals with insecure attachment to caregivers were more likely to compensate for their insecure attachment bonds through participation in religious activity, whereas their internal, private relationship with God corresponded with their previous insecure attachment bonds. Individuals with insecure attachment to caregivers were more likely to endorse symptoms of depression and report introjective, but not anaclitic, depressive experiences. With respect to attachment to God, introjective depressive experiences were positively related to both anxious and avoidant attachments, whereas, anaclitic depressive experiences were …
Date: August 2008
Creator: Hill, Mary Kathleen
System: The UNT Digital Library

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

Access: Use of this item is restricted to the UNT Community
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 …
Date: August 2002
Creator: Méndez-Flanigan, Maria Gisela
System: The UNT Digital Library
The Surface: A Synthesis (open access)

The Surface: A Synthesis

This paper examines the speech-based musical realization of "The Surface" and its attempt to assimilate the poem at the structural, sonic, and expressive level. The software and analysis/re-synthesis techniques used to create timbres heard in the composition are discussed in detail. In addition to technical and structural issues, the common elements of the two art forms are considered within the context of the digital domain.
Date: May 2001
Creator: Willis, Stephen
System: The UNT Digital Library
Effects of Triclosan, Triclocarban, and Caffeine Exposure on the Development of Amphibian Larvae. (open access)

Effects of Triclosan, Triclocarban, and Caffeine Exposure on the Development of Amphibian Larvae.

Triclosan and triclocarban are antimicrobials found in numerous consumer products, while caffeine is the most commonly consumed stimulant by humans. This study was undertaken to determine the effects of triclosan, triclocarban, and caffeine on the development and physiology of amphibian larvae. LC50 values of triclosan and triclocarban were determined after 96 hours for three North American larval species: Acris crepitans blanchardii, Bufo woodhousii woodhousii, Rana sphenocephala, and for a common amphibian developmental model: Xenopus laevis. Amphibian larvae were most sensitive to triclosan and triclocarban exposure during early development based upon 96-hour LC50 values. Heart rates for X. laevis and North American larvae exposed to triclosan were variable throughout development. However, significantly lower heart rates were observed in all larvae exposed to triclocarban. Metabolic rates of X. laevis and R. sphenocephala larvae exposed to triclosan were significantly affected in larvae exposed to ½ LC50 and the LC50 concentration. Metabolic rates of X. laevis larvae exposed to triclocarban were significantly affected by exposure to ½ LC50 concentrations in three of four stages investigated. No significant differences were observed in North American larvae exposed to triclocarban. Tissue uptake, lipid uptake, tissue bioconcentration factor (BCF) and lipid BCF of triclosan and triclocarban were investigated …
Date: August 2009
Creator: Palenske, Nicole Marie
System: The UNT Digital Library