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Quantization Dimension for Probability Definitions
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The term quantization refers to the process of estimating a given probability by a discrete probability supported on a finite set. The quantization dimension Dr of a probability is related to the asymptotic rate at which the expected distance (raised to the rth power) to the support of the quantized version of the probability goes to zero as the size of the support is allowed to go to infinity. This assumes that the quantized versions are in some sense ``optimal'' in that the expected distances have been minimized. In this dissertation we give a short history of quantization as well as some basic facts. We develop a generalized framework for the quantization dimension which extends the current theory to include a wider range of probability measures. This framework uses the theory of thermodynamic formalism and the multifractal spectrum. It is shown that at least in certain cases the quantization dimension function D(r)=Dr is a transform of the temperature function b(q), which is already known to be the Legendre transform of the multifractal spectrum f(a). Hence, these ideas are all closely related and it would be expected that progress in one area could lead to new results in another. It would …
Date:
December 2001
Creator:
Lindsay, Larry J.
System:
The UNT Digital Library
An Etiology of Juvenile Homicide in Dallas, Texas: 1988-1997
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Use of this item is restricted to the UNT Community
This research analyzed all juveniles involved in a homicide, both victims and offenders, in the city of Dallas, Texas from the years 1988 through 1997. This study addressed several research questions including the identification of risk factors common to both victims and offenders. Data for this study was obtained from the homicide files of the Dallas Police Department. The findings in part identify specific profiles of the victims and offenders, as well as identifying comparisons of risk factors between the two groups. Also identified are the relationships between the offenders and victims. Conclusions from this research present implications for law enforcement agencies, as well as furthering the etiology of juvenile homicide.
Date:
December 2001
Creator:
Haynes, Joseph
System:
The UNT Digital Library
Summer Rain Part I Summer Rain - Dawn for Two-channel Tape; Part II After the Summer Rain for Piano and Two-channel Tape
This dissertation contains five chapters: 1. Introduction, 2. Basic Digital Processing Used in Summer Rain, 3. Part I Summer Rain - Dawn, 4. Part II After the Summer Rain and 5. Conclusion. Introduction contains a brief historical background of musique concrète, Electronische Musik, acousmatic music and music for instruments and tape, followed by basic descriptions of digital technique used in both parts of Summer Rain in Chapter 2. Also Chapter 2 describes software used in Summer Rain including "Kawamoto's VST," which is based on MAX/MSP, to create new sounds from the recorded samples using a Macintosh computer. In both Chapter 3 and 4, Kawamoto discusses a great deal of the pre-compositional stage of each piece including inspirational sources, especially Rainer Maria Rilke's poems and Olidon Redon's paintings, as well as her visual and sound imageries. In addition Chapter 3 she talks about sound sources, pitch, form and soundscape. Chapter 4 contains analysis on pitch in the piano part, rhythm, form and the general performance practice. Chapter 5 is a short conclusion of her aesthetics regarding Summer Rain, which is connected to literature, visual art and her Japanese cultural background.
Date:
December 2001
Creator:
Kawamoto, Hideko
System:
The UNT Digital Library
Two Fingers: Michael's Struggle
This written thesis gives an account of the creative production of Two Fingers: Michael's Struggle, a twenty-nine minute documentary video that explores the life of Michael Alan Rasch who suffers from Duchenne Muscular Dystrophy. It explains in detail the process of pre-production, production, and post-production of the documentary. It also discuses the integration of theories applied in the documentary. Two Fingers shows that although Michael has lived with the disease almost his entire life, his perspective and attitude are more about living and enjoying life. Through it, the filmmaker intends the viewer to gain a tremendously important lesson about the human spirit.
Date:
December 2001
Creator:
Youm, Mi-jung
System:
The UNT Digital Library
Electroencephalographic (EEG) biofeedback treatment for children with attention deficit disorders in a school setting.
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Use of this item is restricted to the UNT Community
The purpose of this study was to explore the use of EEG biofeedback in a school setting to assist students who had attentional challenges. The equipment for implementing biofeedback was relatively inexpensive and was easily integrated into the school setting. Twenty students ranging in age from 7 to 17 were recruited for this study. Data was used from 14 subjects, 12 males (2 Hispanic, 1 African American, and 10 Caucasian) and 2 females (1 Hispanic, 1 Caucasian.) The subject pool was reduced due to non-compliance or the students. moving from the school district. Significant effect size was obtained in the treatment group in areas pertaining to visual perception and motor coordination. However, significant effect sizes in other areas were obtained when the control group scores worsened. The inclusion of student subjects who, perhaps, did not meet stringent criterion of attention deficit may have skewed the results. The small number of students in the study may have hindered accurate measures of statistical significance. Conversely, the information obtained from this study may offer insight to school districts in providing their students an alternate/adjunct to psychopharmacological medication and a non- invasive method of helping students with psycho-social challenges.
Date:
December 2001
Creator:
Mosse, Leah Kathryn
System:
The UNT Digital Library
Development of a Pre-Impact Environmental Site Characterization for the Bryan Mound, Texas Strategic Petroleum Reserve
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Use of this item is restricted to the UNT Community
This thesis presents a model for developing site-specific contingency plans to be used during spill response, remediation, and post-spill monitoring using the Strategic Petroleum Reserve's Bryan Mound site as a case study. Bird and vegetation observations provide baseline data for biological conditions, and sediment sampling for total petroleum hydrocarbons serves as a chemical component of the model. Results demonstrate previously unknown conditions that would hinder remediation and affect the persistence of petroleum contaminants. Results also established previously unmapped dominant bird and vegetation types likely to be impacted by a spill at the site. This model points to a reconsideration of individual facilities' responsibilities when planning for large-scale disasters and protecting the sensitive ecosystems surrounding their sites.
Date:
December 2001
Creator:
Hernandez, Sylvia A.
System:
The UNT Digital Library
Characterization of Moraxella bovis Aspartate Transcarbamoylase
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Use of this item is restricted to the UNT Community
Aspartate transcarbamoylase (ATCase) catalyzes the first committed step in the pyrimidine biosynthetic pathway. Bacterial ATCases have been divided into three classes, class A, B, and C, based on their molecular weight, holoenzyme architecture, and enzyme kinetics. Moraxella bovis is a fastidious organism, the etiologic agent of infectious bovine keratoconjunctivitis (IBK). The M. bovis ATCase was purified and characterized for the first time. It is a class A enzyme with a molecular mass of 480 to 520 kDa. It has a pH optimum of 9.5 and is stable at high temperatures. The ATCase holoenzyme is inhibited by CTP > ATP > UTP. The Km for aspartate is 1.8 mM and the Vmax 1.04 µmol per min, where the Km for carbamoylphosphate is 1.05 mM and the Vmax 1.74 µmol per min.
Date:
December 2001
Creator:
Hooshdaran, Sahar
System:
The UNT Digital Library
Effects of Teaching Reading Through Discussion of Text Structures.
The purpose of this study was to investigate the effectiveness of teaching reading through discussion of text structures on students' reading comprehension. The design of the study was a Pretest-Posttest Control-Group Design. One hundred twenty-six sophomore and senior Thai college students majoring in English and attending afternoon English classes participated in the 10-week study and were randomly assigned to an experimental group and a control group. The experimental group received reading instruction in the characteristics of narrative and expository text structures and how to discuss the details of story by applying knowledge of text structures. The control group, on the other hand, read each story silently by themselves and answered comprehension questions. The posttest means of the two groups were compared, and a t test was used to test the significance difference of the means. The results did not reveal any differences between the means. The short time of the intervention may be a crucial factor that made the two strategies yield the same effects. However, the survey responses showed the participants liked reading through discussion of text structures more than reading by themselves.
Date:
December 2001
Creator:
Piyanukool, Surachai
System:
The UNT Digital Library
Fifth Grade Students as Emotional Helpers with Kindergarten Children, Using Play Therapy Procedures and Skills
This research study investigated the effectiveness of a filial therapy training model as a method to train fifth grade students in child-centered play therapy skills and procedures. Filial therapy is an intervention that focuses on strengthening and enhancing adult-child relationships. The fifth grade students were trained to be a therapeutic change agent for kindergarten children identified as having adjustment difficulties, by utilizing basic child-centered play therapy skills in weekly play sessions with the kindergarten children. Specifically, this research determined the effectiveness of filial therapy in increasing the fifth grade students': 1) empathic responses with kindergarten children; 2) communication of acceptance with kindergarten children; 3) allowance of self-direction with kindergarten children, and 4) involvement in play activities of kindergarten children. The experimental group of fifth grade students (N=12) received thirty-five minutes of training twice a week for 5 weeks and then once a week for the duration of the 10 weeks of play sessions. The control group (N=11) received no training during the 15 weeks of the project. Fifth grade student participants were videotaped playing with a kindergarten child identified as having adjustment difficulties in 20-minute play sessions before and after the training to measure empathic behavior in adult-child interactions. Analysis …
Date:
December 2001
Creator:
Robinson, Julianna M. Ziegler
System:
The UNT Digital Library
Death and Ethnicity: A Psychocultural Study-Twenty-Five Years Later.
his study compares ethnic, age, and gender differences concerning attitudes and behaviors toward death, dying, and bereavement among Caucasian, African, Hispanic, and Asian American adult participants in north Texas with the results of a 1976 study by Kalish and Reynolds on death attitudes and behaviors of Caucasian, African, Mexican, and Japanese American adult participants in Los Angeles, California. A modified version of Kalish and Reynolds' study questionnaire was administered to 526 respondents (164 Caucasian, 100 African, 205 Hispanic, and 57 Asian Americans) recruited from community and church groups. Findings of this study were compared with those of Kalish and Reynolds in specific areas, including experience with death, attitudes toward one's own death, dying, and afterlife, and attitudes toward the dying, death, or grief of someone else. Data was analyzed employing the same statistical tools as those used by Kalish and Reynolds, i.e., chi square calculations, frequencies, percentages, averages, and analyses of variance. As compared with the earlier study, results indicated that this study's participants were less likely to have known as many persons who had died recently or to state they would try very hard to control grief emotions in public. Present study participants were more likely to have visited …
Date:
December 2001
Creator:
Peveto, Cynthia A.
System:
The UNT Digital Library
The Relationship Between Classroom Climate and Student Achievement
The purpose of this study was to determine the relationship between sixth grade students' academic achievement levels in math and their perceptions of school climate. Student characteristics of socioeconomic status and gender were used to identify groups for the purpose of data analysis. Data was gathered using the five independent variables of the My Class Inventory (satisfaction, friction, competitiveness, difficulty, and cohesiveness) and the dependent variable of the Stanford Achievement Total Math scores. The results of the data collection were tested using a Pearson product-moment analysis and a backward multiple regression analysis. A univariate analysis of variance was also used to compare the five independent variables of the My Class Inventory as well as to compare socioeconomic status and gender with the Stanford Achievement Total Math scores. The schools selected for this study were from a city in Texas with a population of approximately 100,000. The sample consisted of 262 sixth grade mathematics students. The findings of this study are as follows: (a) The Pearson product-moment correlation analysis revealed little, if any, correlation for any of the five subscale predictor variables; (b) the multiple regression analysis revealed that all five classroom climate indicators combined together could explain only 10.5% of …
Date:
December 2001
Creator:
Bennett, Jan
System:
The UNT Digital Library
Supporting Computer-Mediated Collaboration through User Customized Agents
This research investigated a neglected problem - interruption of groups by agent advisory systems. The question was whether interruption by the agent advisory system was beneficial. A survey of literature in four areas is included in this dissertation. The areas surveyed were Agents, Online Help, Computer Supported Cooperative Work(CSCW) and Awareness in CSCW. Based on the review, a human subject experiment was conducted. The study investigated whether the style of agent advisory interface improved the performance of group members. There were three sets of groups, a control set that did not have advisory agents, a set that had system provided advisory agents and a set that had group customized advisory agents. The groups worked together using a CSCW application developed with GroupKit, a CSCW toolkit. The groups with group customized advisory agents used an Agent Manager application to define advisory agents that would give them advice as they worked in the CSCW application. The findings showed that the type of advisory agents did not significantly influence the performance of the groups. The groups with customized agents performed slightly better than the other groups but the difference was not statistically significant. When notified that advice was issued, groups with customized agents …
Date:
December 2001
Creator:
Ducksworth, Letatia Bright
System:
The UNT Digital Library
An Analysis of Sales People's Perceptions of Performance Appraisal Criteria at a Telecommunications Corporation.
The purpose of this study was to identify and analyze sales people's perceptions of performance appraisal criteria in a telecommunications corporation. The study was prompted by the perceived disillusionment of the sales people with the current performance appraisal criteria. The perceptions of 67 sales people were assessed using a questionnaire developed by the researcher. One-way analysis of variance procedures (ANOVA) were used to determine if there were statistically significant differences in premise and telemarketing sales people's perceptions of performance appraisal criteria. Findings indicated that there were no statistically significant difference in premise and telemarketing sales people's perceptions of the 38 performance appraisal criteria statements. Findings did not indicate a statistically significant difference in premise and telemarketing sales people's perceptions of the performance criteria statements, the attitude or satisfaction statements, and the peripheral issue statements. Based on this study, the sales people appear to have clear perceptions of the performance appraisal criteria.
Date:
December 2001
Creator:
Harris, Ellen L.
System:
The UNT Digital Library
Form and Lyricism as Elements of Neo-Romanticism in Summer Music Op. 31 by Samuel Barber (1957) with three recitals of selected works by Bach, Mozart, Hindemith, Handel, Gaubert, and others
The music of Samuel Barber is well known in the vocal, piano, and string literature; however, little of his chamber music involves woodwinds, and in particular, only one work involves the woodwind quintet. Summer Music, originally commissioned as a septet, developed after the premiere of the work into the woodwind quintet version, with the assistance of the New York Woodwind Quintet. Barber is considered a contemporary .romantic. composer, evidenced through his use of lyricism. Summer Music, a standard in the woodwind quintet literature, should be included in every professional flutist's repertoire. The intent of this dissertation is to consider Barber's use of lyricism as a determinant of the form of Summer Music, as well as to compare the differences between the manuscript and the published edition.
Date:
December 2001
Creator:
Grosklos, Hollie Jo
System:
The UNT Digital Library
The relationships between insight, psychopathological symptoms, and neurocognitive function in psychotic disorders.
Many psychotic patients fail to admit they are mentally ill. The current study evaluated the associations between insight, specific symptoms, and neurocognitive impairments. Thirty-three acute inpatients with a schizophrenia, schizoaffective disorder, or psychotic disorder NOS diagnosis were rated on the SAIE, Birchwood's IS, and the BPRS. Neurocognitive assessments of attention and frontal lobe functioning were also conducted. Stepwise multiple regression analyses found composites representing delusions, disorganization, and anxiety/depression, as well as CPT-IP shapes hit rate, served as significant predictors of total insight or the specific insight dimensions. At least for acute patients, symptoms tended to have stronger relationships with and were more regularly predictive of insight than neurocognitive measures, though the attentional task associated with right hemisphere functioning, contributed significantly.
Date:
December 2001
Creator:
Gonterman, Andrea R.
System:
The UNT Digital Library
The Characteristics of Teacher-Directed Modeling Evidenced in the Practices of Three Experienced High School Choral Directors.
The purpose of this study was to analyze the characteristics of teacher directed modeling evidenced in the practices of three experienced high school choral directors. Research questions were: 1. What modeling activities were exhibited in each teacher's rehearsals? 2. When viewing a 45-minute composite tape of each teacher's instructional activities representative of all rehearsals, what instructional behaviors did each choral director recognize and identify as modeling? 3. What instructional episodes on the composite tape not identified by the teachers contained elements of modeling? 4. What other episodes from the remainder of each choral director's rehearsal practice contributed to an understanding of modeling? Videotapes of three high school choral directors were recorded over the course of one semester. Excerpts from rehearsals were combined to form a 45-minute composite tape of each choral director. A text transcription was made of the composite tape. Participant directors viewed their tape and identified instructional episodes that they recognized as examples of modeling. Identifications were analyzed, and descriptive categories of modeling behaviors were established. Modeling was found to be a teacher generated or delegated act of demonstration. Demonstrations were musical or non-musical and belonging to either of three distinct categories: audible, visible, or process modeling. Subdivisions …
Date:
December 2001
Creator:
Grimland, Fredna H.
System:
The UNT Digital Library
Characterization of the Aspartate Transcarbamoylase that is Found in the pyrBC Complex of Bordetella Pertussis
An aspartate transcarbamoylase (ATCase) gene from Bordetella pertussis was amplified by PCR and ligated into pT-ADV for expression in Escherichia coli. This particular ATCase (pyrB) was an inactive gene found adjacent to an inactive dihydroorotase (DHOase) gene (pyrC'). This experiment was undertaken to determine whether this pyrB gene was capable of expression alone or if it was capable of expression only when cotransformed with a functional pyrC'. When transformed into E. coli TB2 pyrB-, the gene did not produce any ATCase activity. The gene was then co-transformed into E. coli TB2 pyrB- along with a plasmid containing the pyrC' gene from Pseudomonas aeruginosa and assayed for ATCase activity. Negative results were again recorded.
Date:
December 2001
Creator:
Dill, Michael T
System:
The UNT Digital Library
Technology Standards for the Improvement of Teaching and Learning in Community College Music Programs
Providing standards for music technology use in community college music programs presents both challenges and opportunities for educators in American higher education. A need exists to assess the current use of technology at the community college level for the purpose of improving instruction. Although limited research has been done on the use of technology to support music education K- 12 and in four-year universities, little research on the problem in the community college setting was found. This research employed a Delphi study, a method for the systematic solicitation and collection of professional judgments on a particular subject, to examine existing criteria, “best practices”, and standards, in an effort to develop a set of standards specifically for the community college level. All aspects of a complete music program were considered including: curriculum, staffing, equipment, materials/software, facilities and workforce competencies. The panel of experts, comprised of community college educators from throughout the nation, reached consensus on 50 of the 57 standards. Forty-one or 82%, were identified as minimal standards for the application of music technology in music education. Community college music educators, planning to successfully utilize music technology to improve teaching and learning should implement the 41 standards determined as minimal by …
Date:
December 2001
Creator:
Crawford, Michael
System:
The UNT Digital Library
Spatial Analysis of Teen Births in North Central Texas
The United States has the highest teen birth rate among western industrialized countries and the highest levels of pregnancy among adolescents (Alan Guttmacher Institute, 1994). While the rate of teen births is high throughout the country, considerable variations exist between and within regions. Texas is one of the 5 leading states with the highest teen birth rates to mothers less than 18 years of age. This research provides a detailed analysis of births to mothers aged between 10 and 19 years in North Central Texas counties. Due to the modifiable area unit problem and to provide a finer geographical scale of analysis, teen births in Dallas County zip codes were examined as a special case study. Statistical and Geographic Information System (GIS) analysis reveal that race/ethnicity, education and income are significant factors in teen births in the region. Single parent households and receipt of public assistance were not statistically significant. Suggestions for reducing vulnerability to teen births are presented.
Date:
December 2001
Creator:
Donkor, Faustina Fosua
System:
The UNT Digital Library
Dynamic Resource Management in RSVP- Controlled Unicast Networks
Resources are said to be fragmented in the network when they are available in non-contiguous blocks, and calls are dropped as they may not end sufficient resources. Hence, available resources may remain unutilized. In this thesis, the effect of resource fragmentation (RF) on RSVP-controlled networks was studied and new algorithms were proposed to reduce the effect of RF. In order to minimize the effect of RF, resources in the network are dynamically redistributed on different paths to make them available in contiguous blocks. Extra protocol messages are introduced to facilitate resource redistribution in the network. The Dynamic Resource Redistribution (DRR) algorithm when used in conjunction with RSVP, not only increased the number of calls accommodated into the network but also increased the overall resource utilization of the network. Issues such as how many resources need to be redistributed and of which call(s), and how these choices affect the redistribution process were investigated. Further, various simulation experiments were conducted to study the performance of the DRR algorithm on different network topologies with varying traffic characteristics.
Date:
December 2001
Creator:
Iyengar Prasanna, Venkatesan
System:
The UNT Digital Library
Measuring the Effects of the TYC Gainesville Resocialization Program on Juvenile Offender Resiliency Levels
An analysis of the effects of resocialization programming on juvenile offender resiliency levels was conducted with 220 juveniles committed to a maximum security facility. Data were examined on the subjects' age, race/ethnicity, length of time at the facility, level of resocialization, and resiliency score. The resocialization programming contains cognitive and social components that would be instrumental in augmenting juvenile offender resiliency levels. Analysis of the variables did not show a significant increase in juvenile offender resiliency levels. The results did display that students who were at the facility longer and who were in the older age groups had higher levels of resocialization.
Date:
December 2001
Creator:
Kronvall, Veronica L
System:
The UNT Digital Library
Taoism and Contemporary Environmental Literature
This thesis encompasses a survey of contemporary environmental literature (1970s to the present) as it relates to the tenets of Taoist literature, specifically the Chuang Tzu and the Tao te Ching. The thesis also presents and evaluates pertinent criticisms concerning the practice of relating modern environmental problems to ancient Chinese philosophy. The thesis contains a preface that describes the historic roots of Taoism as well as an explanation of the Chinese terminology in the paper. The environmental literature is divided into three major groups and discussed in the three chapters of the paper. The three groups include mainstream environmentalists, deep ecology, and ecofeminism.
Date:
December 2001
Creator:
Kane, Virginia M.
System:
The UNT Digital Library
The Effects of Restricting the Response Space and Self-evaluation on Letter Quality in Beginning and Experienced Handwriters.
This study analyzed the effects of restricting the response space and selfevaluation on students' handwriting quality in two beginning handwriters and two experienced handwriters. Students executed letters with and without using a transparent overlay, in a multiple-baseline-across-letters design. The use of the transparent overlay included drawing letters in a space restricted by the transparency; overlaying a model letter on top of the written letter and; evaluating if the two letters matched. Letter quality immediately improved when overlays were used, and handwriting quality maintained when the writing response was not restricted by the overlay transparency. Prompting and feedback were delivered contingent on on-task behavior. Analysis was based on three different measurement systems.
Date:
December 2001
Creator:
LePage, Julia
System:
The UNT Digital Library
Metal-Aluminum Oxide Interactions: Effects of Surface Hydroxylation and High Electric Field
Metal and oxide interactions are of broad scientific and technological interest in areas such as heterogeneous catalysis, microelectronics, composite materials, and corrosion. In the real world, such interactions are often complicated by the presence of interfacial impurities and/or high electric fields that may change the thermodynamic and kinetic behaviors of the metal/oxide interfaces. This research includes: (1) the surface hydroxylation effects on the aluminum oxide interactions with copper adlayers, and (2) effects of high electric fields on the interface of thin aluminum oxide films and Ni3Al substrate. X-ray photoelectron spectroscopy (XPS) studies and first principles calculations have been carried out to compare copper adsorption on heavily hydroxylated a- Al2O3(0001) with dehydroxylated surfaces produced by Argon ion sputtering followed by annealing in oxygen. For a heavily hydroxylated surface with OH coverage of 0.47 monolayer (ML), sputter deposition of copper at 300 K results in a maximum Cu(I) coverage of ~0.35 ML, in agreement with theoretical predictions. Maximum Cu(I) coverage at 300 K decreases with decreasing surface hydroxylation. Exposure of a partially dehydroxylated a-Al2O3(0001) surface to either air or 2 Torr water vapor results in recovery of surface hydroxylation, which in turn increases the maximum Cu(I) coverage. The ability of surface hydroxyl …
Date:
December 2001
Creator:
Niu, Chengyu
System:
The UNT Digital Library