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John Buchan (1875-1940) and the First World War: A Scot's Career in Imperial Britain

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This dissertation examines the political career of Scottish-born John Buchan (1875-1940) who, through the avenue of the British Empire, formed political alliances that enabled him to enter into the power circles of the British government. Buchan's involvement in governmental service is illustrative of the political and financial advantages Scots sought in Imperial service. Sources include Buchan's published works, collections of correspondence, personal papers, and diaries in the holdings of the National Library of Scotland, Edinburgh. Letters and other documents pertaining to Buchan's life and career are also available in the Beaverbrook papers, Lloyd George papers, and Strachey papers at the House of Lords Record Office, London, and in the Liddle Hart Collection at King's College, London. Documents concerning Buchan's association with the War Cabinet, the Foreign Office, and the Department of Information are among those preserved at the Public Record Office, London. References to Buchan's association with the British Expeditionary Force in France are included in the holdings of the Intelligence Corps Museum, Ashford, Kent. The study is arranged chronologically, and discusses Buchan's Scottish heritage, his education, his assignment on Lord Alfred Milner's staff in South Africa, and his appointment as Director of the Department of Information during World War …
Date: December 1999
Creator: Mann, Georgia A.
System: The UNT Digital Library

Measuring Change in University Counseling Center Students: Using Symptom Reduction and Satisfaction with Services to Propose a Model for Effective Outcome Research

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Abstract This study proposes a model for meeting increasingly mandated outcome research objectives in a university counseling center setting. It is proposed that counseling centers utilize their existing intake forms, along with an annual satisfaction survey to determine the effectiveness of counseling services. Effectiveness is defined as improvement and measured by the reduction of the symptoms or presenting concerns with which the client initially presented. It also introduces the Relative-Change Index (R-Chi) as an objective way to quantify intra-individual change occurring as a result of therapy. This new mathematical procedure allows for a more meaningful assessment of the client's degree of improvement, relative to their potential for improvement. By re-administering the problem checklist, routinely included as part of the initial paperwork for each client at intake, again post-therapy, it is possible to quantify improvement by measuring the difference in distressing concerns. Additionally, including a subjective, retrospective survey question asking the client to indicate their perceived rate if improvement at follow-up provides construct validity and allows for correlational comparisons with R-Chi. Results suggest that student/client ratings of the degree to which the services they received satisfactorily addressed their presenting concerns were significantly rated to their R-Chi score. This model suggests that …
Date: December 1999
Creator: Quick, Cynthia L.
System: The UNT Digital Library

As Darkness Falls: A Composition for Wind Ensemble

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As Darkness Falls is a composition that explores our interaction with several aspects of darkness through the use of musical imagery. The imagery attempts to reflect the moods, feelings, and impressions of a person as he or she interacts with darkness. The non-programmatic character of the composition allows listeners to superimpose their own experiences onto the musical tapestry in order to manifest a personal connection between the listener and the music. As Darkness Falls is a composition scored for a minimum instrumentation of piccolo, 6 flutes, 3 oboes, 3 bassoons, 9 B-flat clarinets, B-flat bass clarinet, 2 E-flat alto saxophones, B-flat tenor saxophone, E-flat baritone saxophone, 4 B-flat trumpets, 4 horns in F, 3 tenor trombones, bass trombone, 2 euphoniums, 2 tubas, timpani, and 4 percussionists. The music consists of three movements (slow-slow-fast) lasting a total of approximately seventeen minutes. The duration of each of the three movements is six minutes, four and one-half minutes, and six and one-half minutes, respectively. The document also contains an analysis of the work by the composer. The analysis explores the compositional style of the work, focusing on musical aspects within each movement that were governing parameters in the compositional process.
Date: December 1999
Creator: Prinz, Kendall R.
System: The UNT Digital Library

'...and one of time.': A Composition for Full Orchestra with Narration

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‘...and one of time.' is a reinterpretation of a small musical moment from Philip Glass' opera, Einstein on the Beach, centered around the phrase "Berne, Switzerland 1905." This reinterpretation is realized through the use of several different compositional techniques including spectral composition, micropolyphony and dodecaphony, as well as the application of extra-musical models developed by Alan Lightman, John Gardner, Italo Calvino and Albert Einstein.
Date: December 1999
Creator: Rinker, John Thomas
System: The UNT Digital Library

Structural Analysis of the TOL pDK1 xylGFJQK Region and Partial Characterization of the xylF and xylG Gene Products

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TOL plasmids encode enzymes responsible for utilization of toluene and related aromatic compounds by Pseudomonas putida, ultimately converting them to central metabolic intermediates. The nucleotide sequence for the 5.6 kb xylGFJQK region of the pDK1 TOL meta operon was determined. DNA sequence analysis revealed the presence of five open reading frames corresponding to xylG (1458 bp), xylF (846 bp), xylJ (783 bp), xylQ (936 bp) and xylK (1047 bp), encoding predicted protein products of 51.6, 31.3, 27.8, 32.8, and 36.6 kDa in size, respectively. The average G+C content of the xylLTEGFJQK region was 65.7%, somewhat higher than the 58.9% seen in the immediately upstream xylXYZ region and substantially more than the 50% G+C content reported for the upper TOL operon of this plasmid. Homology comparisons were made with genes and proteins of related catabolic plasmids. The dmpCDEFG and pWWO xylGFJQK regions exhibit consistently high levels of nucleotide and amino acid homology to pDK1 xylGFJQK throughout the entire region. In contrast, although the nucleotide sequence homology of the Acinetobacter atdCDE region to xylGFJ is high, the homology of atdFG to xylQK is markedly less. Such radical changes in homology between corresponding regions of different operons, combined with variable base and codon …
Date: December 1999
Creator: Poulter, Melinda D.
System: The UNT Digital Library
Benchmarks in American Higher Education: Selected Approaches for Distance Education Copyright and Intellectual Property Policies (open access)

Benchmarks in American Higher Education: Selected Approaches for Distance Education Copyright and Intellectual Property Policies

An evaluation of American higher education distance education programs was conducted to explore how they approach intellectual property, copyright and information sharing/antitrust policy concerns for Internet-based programs. An evaluation of the current status of distance education and Internet-based training in higher education was conducted through a pilot study that included a random sample of 223 accredited institutions. Seventy-seven institutions responded to a survey, of which there were 14 Research I&II, 17 Doctorate I&II, and 46 Master's I&II institutions included in this study. A review of institutional policy approaches for these 77 institutions was conducted via Internet Web site and bulletin review. A multiple-case study was also conducted which included 10 of the top 30 accredited distance education institutions in America. Policy approaches were examined for all institutions and differences were discussed for public and private institutions as well as the following Carnegie Class institutions- Research I&II, Doctorate I&II and Master's I&II. Ten percent of all institutions that responded to the pilot study developed a written policy addressing antitrust/information-sharing concerns. Additionally, the data indicated that 22% of institutions in these Carnegie Class ranges published copyright and intellectual property policy on their institutions' Internet Web site. Ninety percent of the institutions in …
Date: December 1999
Creator: Smith, Kenneth D.
System: The UNT Digital Library

Personality Characteristics of Counselor Education Graduate Students as Measured by the Myers-Briggs Type Indicator and the Bem Sex Role Inventory

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This study was designed to investigate the correlation of the variables of gender, Myers-Briggs Type Indicator (MBTI) personality preferences, and androgyny as measured by the Bem Sex Role Inventory (BSRI) in Counselor Education graduate students. Instruments were administered to Counselor Education graduate students at nine institutions in five national regions. A total of 172 participants (18 males and 154 females) who were enrolled in Master's level theories courses or practicum courses completed a student information sheet, informed consent, MBTI, and BSRI. Instruments were hand scored and chi-square test was used to determine significance of the hypotheses; the saturated model of log linear analysis was the statistic used for the research question. As predicted, of the sixteen MBTI types, the most common for Counselor Education graduate students emerged as ENFP: extraversion, intuition, feeling, and perception. Additionally, this MBTI type was found to be significantly more common among the population of Counselor Education graduate students than is found among the general population. The expectation that more male Counselor Education graduate students would score higher on the androgyny scale of the BSRI was unsupported; low sample size for male Counselor Education graduate students prevented use of chi-square; however, it was apparent through the …
Date: December 1999
Creator: VanPelt-Tess, Pamela
System: The UNT Digital Library

A Sensory Tour of Cape Cod: Thoreau's Transcendental Journey to Spiritual Renewal

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Predominantly darker than his other works, Cape Cod depicts Henry David Thoreau's interpretation of life as a struggle for survival and a search for salvation in a stark New England setting. Representing Thoreau's greatest test of the goodness of God and nature, the book illustrates the centrality of the subject of death to Thoreau's philosophy of life. Contending that Thoreau's journey to the Cape originated from an intensely personal transcendental impulse connected with his brother's death, this study provides the first in-depth examination of Thoreau's use of the five senses in Cape Cod to reveal both the eccentricities inherent in his relationship with nature and his method of resolving his fears of mortality. Some of the sense impressions in Cape Cod--particularly those that center around human death and those that involve tactile sensations--suggest that Thoreau sometimes tried to master his fears by subconsciously altering painful historical facts or by avoiding the type of sensual contact that aggravated the repressed guilt he suffered from his brother's death. Despite his personal idiosyncrasies, however, Thoreau persisted in his search for truth, and the written record of his journey in Cape Cod documents how his dedication to the transcendental process enabled him to surmount …
Date: December 1999
Creator: Talley, Sharon
System: The UNT Digital Library
An Examination of David Maslanka's Marimba Concerti: Arcadia II for Marimba and Percussion Ensemble and Concerto for Marimba and Band, A Lecture Recital, Together With Three Recitals of Selected Works of K.Abe, M. Burritt, J. Serry, and Others (open access)

An Examination of David Maslanka's Marimba Concerti: Arcadia II for Marimba and Percussion Ensemble and Concerto for Marimba and Band, A Lecture Recital, Together With Three Recitals of Selected Works of K.Abe, M. Burritt, J. Serry, and Others

Although David Maslanka is not a percussionist, his writing for marimba shows a solid appreciation of the idiomatic possibilities developed by recent innovations for the instrument. The marimba is included in at least eighteen of his major compositions, and in most of those it is featured prominently. Both Arcadia II: Concerto for Marimba and Percussion Ensemble and Concerto for Marimba and Band display the techniques and influences that have become characteristic of his compositional style. However, they express radically different approaches to composition due primarily to Maslanka's growth as a composer. Maslanka's traditional musical training, the clear influence of diverse composers, and his sensitivity to extra-musical influences such as geographic location have resulted in a very distinct musical style. His exemplary attention to detail and sound timbres give his works an individualized stamp. The evolution of motivic gestures is the most distinctive characteristic of Maslanka's compositional process. Maslanka freely incorporates forms and structural principles of the baroque and classical periods, but these principles are not applied in a strict sense. These factors combine to produce two works that are both unique and significant in the literature for marimba. They exhibit a sensitivity to sound timbres while maintaining a mature approach …
Date: December 1999
Creator: Varner, Michael L.
System: The UNT Digital Library

Ecological Enhancement of Timber Growth: Applying Compost to Loblolly Pine Plantations

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This study explored the application of compost onto a small loblolly pine tree forest in northeast Texas. Its purpose was to determine if the application of various amounts of compost would provide for accelerated rates of growth for the trees. Soil parameters were also monitored. A total of 270 trees were planted and studied in a northeast Texas forest ecosystem. Compost rates of 5, 25, and 50 tons per acre with either soil or compost backfill were utilized and compared to a control without compost. Nonparametric and parametric ANOVA and Chi-Square tests were utilized. The results indicated that greater application rates retained greater moisture and higher pH levels in the soil. Compost applications also yielded a greater survival rate as well as larger tree height and diameter when compared to the control. The 25 ton/acre application backfilled in native soil achieved the greatest average in height and diameter when compared to the averages for the control plot. Greater growth differences for the 25S application can be attributed to additional nutrients coupled with a stable pH consistent with native soil acidity.
Date: December 1999
Creator: Stuckey, Harold Troy
System: The UNT Digital Library
Use of the College Student Inventory to Predict At-Risk Student Success and Persistence at a Metropolitan University (open access)

Use of the College Student Inventory to Predict At-Risk Student Success and Persistence at a Metropolitan University

Using Tinto's longitudinal model of institutional departure as the theoretical basis for this research, the purpose was to determine what extent selected motivational factors measured by the College Student Inventory (CSI) predict academic success and persistence of at-risk students at the University of North Texas (UNT). The study focused on United States citizens and permanent residents entering UNT as at-risk first-time freshmen admitted via individual approval for the fall 1994 semester. The 409 subjects were enrolled in a developmental course titled Personal and Academic Effectiveness where the CSI was administered during the first 2 weeks of class. Selected predictor variables were tested in relation to the separate criterion variables of grade point average and enrolled status during the 2nd and 4th years of the study. Grade point averages and enrollment data for the 1995-96 and 1997-98 academic years were extracted from the student information management system. The research design employed appropriate multiple regressions, multiple correlations, multiple discriminant analyses, and bivariate correlations. Findings confirmed the ability of five CSI factors to predict grade point average (p < .05) of at-risk students over the time frames used in this study. Nine factors predicting enrolled status were also significant at the .05 level; …
Date: December 1999
Creator: Harris, Joneel J.
System: The UNT Digital Library
The Response of a Public School District to Charter School Competition: An Examination of Free-Market Effects (open access)

The Response of a Public School District to Charter School Competition: An Examination of Free-Market Effects

The purpose of this study was to examine a school district's responses to charter schools operating within its boundaries. The selected district was the only one in the state with two large academically competitive charter schools for at least two years. Four questions guided the research: In terms of instruction, finance, communication, and leadership, how has the traditional district been impacted due to charter school existence? The exploratory research was timely since charter schools are proliferating as tax-supported public choice schools. While many have speculated about free-market effects of charter school competition on systemic educational reform, the debate has been chiefly along ideological lines; therefore, little empirical research addresses this issue. Quantitative and qualitative methodologies were used to present a comprehensive case study. Twenty-six school officials and teachers were interviewed; 159 teachers and 1576 parents were surveyed. District, community, and state education department documents were analyzed. Since charter schools have existed in the district, numerous activities have taken place. Instructional initiatives included a high school academy, expanded technology, gifted and talented, tutoring, and dropout prevention. All elementary and middle schools required uniforms. The district's state accountability rating improved from acceptable to recognized. A leadership void was perceived due to students …
Date: December 1999
Creator: Patrick, Diane Porter
System: The UNT Digital Library
The Effects of a Tactile Prompting Device on the Requesting Behavior of a Child with Autism (open access)

The Effects of a Tactile Prompting Device on the Requesting Behavior of a Child with Autism

In the present experiment, a remote control tactile prompting device (RCT) was utilized to prompt a child with autism to recruit teacher models and play suggestions. A multiple baseline and reversal was used to assess the effects of the RCT across three play contexts. The results showed increases in the number of requests for models and suggestions as well as increases in the duration of interactive play between the child and therapist, the number of contextual statements emitted by the child, and the topography and contexts of the play behaviors emitted by the child. Findings are discussed in terms of the effectiveness and generality of the RCT and the issue of teaching a child to recruit versus teaching a child activity-specific behaviors.
Date: December 1999
Creator: Russo, Lori A.
System: The UNT Digital Library
Reconstructions: Nine Movements for Solo Soprano, Chorus, and Wind Ensemble (open access)

Reconstructions: Nine Movements for Solo Soprano, Chorus, and Wind Ensemble

Reconstructions is a nine-movement composition for solo soprano, chorus, and wind ensemble using texts from several of Emily Dickinson's poems. The soloist represents the main character in this dramatic work, and the narrative structure portrays abstract moments in this character's life. While the narrative structure of the reconstructed fragments is important to the form of the composition, other elements are also significant. Pitch structures generated from set theoretical systems, in addition to cyclic and palindromic structures are utilized throughout. Timbre also delineates the form, as various combinations of instruments and chorus create an evolving environment in which the soloist resides.
Date: December 1999
Creator: Makela, Steven L.
System: The UNT Digital Library
Toward a Rhetoric of Marketing for High-Tech Services (open access)

Toward a Rhetoric of Marketing for High-Tech Services

The market for high-tech services is expanding, and writers will have to create more documents to market these services. Researchers note marked differences between traditional goods marketing and services marketing. A rhetorical framework for high-tech services marketing will give writers a tool for creating effective marketing messages. This study examines the five canons of rhetoric in their classical context, and then examines how the first professional teachers, the Sophists, used rhetoric to promote their services. The canons of rhetoric are then analyzed to show their modern significance. This study also considers visual rhetoric and how writers can use it effectively. This study shows that companies should promote service quality and strong service relationships through the rhetorical element of ethos. This study examines services marketing samples through a visual and verbal rhetorical framework, providing rhetorical insights that writers can use in their work.
Date: December 1999
Creator: Willerton, David Russell
System: The UNT Digital Library
Revealing What Urban Early Childhood Teachers Think About Mathematics and How They Teach It: Implications for Practice (open access)

Revealing What Urban Early Childhood Teachers Think About Mathematics and How They Teach It: Implications for Practice

Hersh (1986) states, "One's conception of what mathematics is affects one's conception of how it should be presented. One's manner of presenting it is an indication of what one believes to be most essential in it." In this research study, three hundred ninety-seven urban early childhood teachers were given a survey that examined their attitudes toward mathematics and mathematics teaching, their views of mathematics, views of teaching mathematics, and views of children learning mathematics. The purpose of this study was to identify the attitudes and beliefs of early childhood teachers in two urban school districts to determine if mathematics reform efforts made a difference in teachers' attitudes and beliefs about mathematics and its teaching. Questionnaires were mailed directly to teachers in one school district and principals distributed questionnaires in the other. Summary scores were calculated for parts of the instrument. The researcher performed descriptive statistics, comparative analysis, and conducted frequency distributions, t-tests, ANOVA, and Pearson Correlations. Findings revealed that teachers with 30 or more years of teaching experience had more positive attitudes toward mathematics than teachers with 1-3 years of experience. African American teachers had more positive attitudes toward mathematics and its teaching than other ethnic groups. Teachers who held …
Date: December 1999
Creator: Hare, Addie Y. V. McGriff
System: The UNT Digital Library
The Effects of Extinction on Human Performance Following Exposure to Fixed Ratio Schedules of Reinforcement (open access)

The Effects of Extinction on Human Performance Following Exposure to Fixed Ratio Schedules of Reinforcement

This experiment examined the effects of extinction on rate of responding and several topographical and temporal measures in adult humans. Three college students were trained to type the sequence 1•5•3 on a numeric keypad on a computer. The subjects were exposed to different fixed-ratio schedules of reinforcement (FR1, FR 5, and FR10 respectively) and extinction. Subjects displayed typical schedule performances during the maintenance phase of the experiment. During extinction the performances were disrupted, they showed a "break and run" pattern and a general decrease in responding. Also, new topographical and temporal patterns emerged. These data are consistent with those reported for non-human species and special human populations.
Date: May 2000
Creator: Anderson, Richard L.
System: The UNT Digital Library
An Analytical Study of the Variations on the Theme of Paganini's Twenty-Fourth Caprice, Op. 1 by Busoni, Friedman, and Muczynski (open access)

An Analytical Study of the Variations on the Theme of Paganini's Twenty-Fourth Caprice, Op. 1 by Busoni, Friedman, and Muczynski

The purpose of this study is to analyze sets of variations on Paganini's theme by three twentieth-century composers: Ferruccio Busoni, Ignaz Friedman, and Robert Muczynski, in order to examine, identify, and trace different variation techniques and their applications. Chapter 1 presents the purpose and scope of this study. Chapter 2 provides background information on the musical form "theme and variations" and the theme of Paganini's Twenty-fourth Caprice, Op. 1. Chapter 2 also deals with the question of which elements have made this theme so popular. Chapters 3,4, and 5 examine each of the three sets of variations in detail using the following format: theme, structure of each variation, harmony and key, rhythm and meter, tempo and dynamics, motivic development, grouping of variations, and technical problems. Chapter 6 summarizes the findings from this study and attempts to compare those elements among the three variations. Special attention is given to the application of the motivic cells, which are drawn from the original Paganini theme, in the development of succeeding variations. This study shows how these motivic cells contribute to the construction of new motives and melodies in each variation. Additionally, this study attempts to examine each composer's efforts in expanding variation procedure …
Date: May 2000
Creator: Ahn, Kwang Sun
System: The UNT Digital Library
Infinite Planar Graphs (open access)

Infinite Planar Graphs

How many equivalence classes of geodesic rays does a graph contain? How many bounded automorphisms does a planar graph have? Neimayer and Watkins studied these two questions and answered them for a certain class of graphs. Using the concept of excess of a vertex, the class of graphs that Neimayer and Watkins studied are extended to include graphs with positive excess at each vertex. The results of this paper show that there are an uncountable number of geodesic fibers for graphs in this extended class and that for any graph in this extended class the only bounded automorphism is the identity automorphism.
Date: May 2000
Creator: Aurand, Eric William
System: The UNT Digital Library
Beyond the Human Voice: Francis Poulenc's Psychological Drama La Voix humaine (1958) (open access)

Beyond the Human Voice: Francis Poulenc's Psychological Drama La Voix humaine (1958)

Francis Poulenc's one-character opera La Voix humaine (1958), a setting of the homonymous play by Jean Cocteau, explores the psychological complexities of an unnamed woman as she experiences the end of a romantic relationship. During the forty-minute work, she sings in a declamatory manner into a telephone, which serves as a sign of the unrevealed man at the other end. Poulenc uses musical motives to underscore the woman's changing emotional states as she recalls her past relationship. The musical dramaturgy in this work resignifies Debussy's impressionist symbolism by collapsing devices used in Pelléas et Mélisande in a language that shifts between octatonicism, chromaticism, harmonic and melodic whole tone passages, and diatonicism. This late work recontextualizes elements in Poulenc's Dialogues des Carmélites (1953-56), and the end of the opera provides a theme for his Sonate pour Clarinet et Piano(1962), as Poulenc reflects on his youthful encounters with Cocteau, Erik Satie, and Les Six.
Date: May 2000
Creator: Beard, Cynthia C.
System: The UNT Digital Library
Heart of the Fathers, for Wind Symphony (open access)

Heart of the Fathers, for Wind Symphony

Heart of the Fathers is a programmatic, seven movement work for wind symphony depicting my ancestors and their role as part of the history of The Church of Jesus Christ of Latter-day Saints. The movements represent their spiritual experiences, labors, times of joy, persecution, migration, and finally their arrival and success in their new homeland. The piece is organized in seven movements. Each movement represents a different portion of history leading to the western migration of my ancestors. The programmatic music contains a variety of symbols depicting the experiences of the pioneers. In the paper, each chapter addresses an individual movement. For each movement, the following information is provided: the historical events that inspired the piece, the musical symbols that characterize the program, and an analysis of the function of the music.
Date: May 2000
Creator: Anderson, Stephen Reg
System: The UNT Digital Library
Husband's and Daughter's Role Strain During Breast Cancer Hospice Patient Caregiving and Bereavement Adjustment (open access)

Husband's and Daughter's Role Strain During Breast Cancer Hospice Patient Caregiving and Bereavement Adjustment

Current literature regarding caregiver bereavement adjustment has advanced two competing models explaining adjustment in relation to caregiver interrole conflict: the Relief Model and Complicated Grief Model. This research has primarily focused on the experience of those providing care to dementia patients. This study tests these competing models of bereavement adjustment for husband and daughter caregivers of breast cancer hospice patients. For husbands, greater psychological strain and health strain were predictive of greater difficulty with bereavement adjustment, supporting the Complicated Grief Model of bereavement adjustment. For daughters, strain was not a significant predictor of bereavement adjustment, and thus did not support either bereavement adjustment model. While daughter caregivers experienced more role strain than husband caregivers during patient care, the degree of role strain was predictive of bereavement adjustment for husbands but not for daughters, suggesting that relationship type (husbands versus daughters) between caregiver and patient impacts which factors influence bereavement adjustment.
Date: May 2000
Creator: Bernard, Lori Lynn
System: The UNT Digital Library
The Effect of Three Different Levels of Skill Training in Musical Timbre Discrimination on Alphabet Sound Discrimination in Pre-Kindergarten and Kindergarten Children (open access)

The Effect of Three Different Levels of Skill Training in Musical Timbre Discrimination on Alphabet Sound Discrimination in Pre-Kindergarten and Kindergarten Children

The purpose of this study was to investigate the effects of three different levels of skill training in musical timbre discrimination on alphabet sound discrimination in pre-kindergarten and kindergarten children. The findings of prior investigations indicated similarities between aural music and language perception. Psychoacoustic and neurological findings have reported the discrimination of alphabet quality and musical timbre to be similar perceptual functions and have provided, through imaging technology, physical evidence of music learning simultaneously stimulating non-musical areas of the brain. This investigator hypothesized that timbre discrimination, the process of differentiating the characteristic quality of one complex sound from another of identical pitch and loudness, may have been a common factor between music and alphabet sound discrimination. Existing studies had not explored this relationship or the effects of directly teaching for transfer on learning generalization between skills used for the discrimination of musical timbre and alphabet sounds. Variables identified as similar from the literature were the discrimination of same- different musical and alphabet sounds, visual recognition of musical and alphabet pictures as sound sources, and association of alphabet and musical sounds with matching symbols. A randomized pre-post test design with intermittent measures was used to implement the study. There were 5 …
Date: May 2000
Creator: Battle, Julia Blair
System: The UNT Digital Library
Linearity and monotonicity of a 10-bit, 125 MHz, segmented current steering digital to analog converter (open access)

Linearity and monotonicity of a 10-bit, 125 MHz, segmented current steering digital to analog converter

The purpose of this research is to determine the linearity and monotonicity of the THS5651IDW digital to analog converter (DAC), a prototype of the future Texas Instruments TLV5651, 10-bit, 125 MHz communication DAC. Testing was conducted at the Texas Instruments facility on Forest Lane, Dallas, Texas. Texas Instruments provided test equipment, software and laboratory space to obtain test data. Analysis of the data found the DAC to be monotonic since the magnitude of the differential nonlinearity (DNL) was less than ± 1 least significant bit (LSB) and the integral nonlinearity (INL) was less than ± 0.5 LSB. The study also showed that the DAC has primarily negative DNL although the DNL is well within the desired specification.
Date: May 2000
Creator: Bittle, Charles C.
System: The UNT Digital Library