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Analysis of ultra-relativistic charged particle beam and stretched wire measurement interactions with cylindrically symmetric structures
The beam impedance and wakefield are quantities which describe the stability of charged particles in their trajectory within an accelerator. The stretched wire measurement technique is a method which estimates the beam impedance and wakefield. Definitions for the beam impedance, the wakefield, and the stretched wire measurement are presented. A pillbox resonator with circular beampipes is studied for its relatively simple profile and mode structure. Theoretical predictions and measurement data are presented for the interaction of various charged particle beams and center conductor geometries between the cavity and beampipe. Time domain predictions for the stretched wire measurement and wakefield are presented and are shown to be a linear interaction.
Date:
December 31, 1996
Creator:
Deibele, C.E.
System:
The UNT Digital Library
A Precision Measurement of the Z{sup 0} Lineshape Parameters for the Process Z{sup 0} {r_arrow} {tau}{sup +}{tau}{sup {minus}}
In this dissertation, a measurement of the partial decay width of the process Z{sup 0} {r_arrow} {tau}{sup +}{tau}{sup {minus}} using data collected during 1993 and 1994 at the OPAL detector at CERN is described. The cross sections of this process at three center-of-mass energies near the Z{sup 0} resonance were determined, and from a fit to those cross sections, the mass of the Z{sup 0}, its total decay width and its partial decay width into {tau}{sup +}{tau}{sup {minus}} final states were determined as M{sub Z} = 91.183 {+-} 0.020 GeV, {Lambda}{sub tot} = 2.514 {+-} 0.018 GeV and {Lambda}{sub {tau}{tau}} = 84.54 {+-} 0.59 MeV. Using published results for M{sub Z}, and {Lambda}{sub tot} with higher accuracy, a value for the partial decay width of {Lambda}{sub {tau}{tau}} = 84.02 {+-} 0.20 MeV was obtained. Further using published results for the decay width of the Z{sup 0} into quark pair final states, the invisible decay width of the Z{sup 0} was determined as {Lambda}{sub inv} = 496.9 {+-} 4.1 MeV, and the number of neutrino generations was determined as N{sub {nu}} = 2.974 {+-} 0.025(exp) {+-} 0.007 (m{sub top}, M{sub Higgs}). All results were found to be in good agreement with …
Date:
December 31, 1996
Creator:
Lahmann, R.
System:
The UNT Digital Library
Spatio-temporal statistical models with applications to atmospheric processes
This doctoral dissertation is presented as three self-contained papers. An introductory chapter considers traditional spatio-temporal statistical methods used in the atmospheric sciences from a statistical perspective. Although this section is primarily a review, many of the statistical issues considered have not been considered in the context of these methods and several open questions are posed. The first paper attempts to determine a means of characterizing the semiannual oscillation (SAO) spatial variation in the northern hemisphere extratropical height field. It was discovered that the midlatitude SAO in 500hPa geopotential height could be explained almost entirely as a result of spatial and temporal asymmetries in the annual variation of stationary eddies. It was concluded that the mechanism for the SAO in the northern hemisphere is a result of land-sea contrasts. The second paper examines the seasonal variability of mixed Rossby-gravity waves (MRGW) in lower stratospheric over the equatorial Pacific. Advanced cyclostationary time series techniques were used for analysis. It was found that there are significant twice-yearly peaks in MRGW activity. Analyses also suggested a convergence of horizontal momentum flux associated with these waves. In the third paper, a new spatio-temporal statistical model is proposed that attempts to consider the influence of both …
Date:
December 31, 1996
Creator:
Wikle, C.K.
System:
The UNT Digital Library
Synthesis of organosilicon compounds
Silicon-containing polymers have been a focus of synthesis and study in Dr. Barton`s group because of their chemistry and properties which are not offered by other systems or materials. For example, the polymer -[-SiMe{sub 2}C{triple_bond}C-]{sub n}-can be easily processed to films or fibers from melt or solution, and thermally converted to a SiC-containing ceramic in high yield at high temperature. In recent years, carbosilane dendritic polymers have been of great interests in many research groups. However, no synthesis of carbosilane dendrimers with functionalties both inside and outside the dendrimer has been reported. Functionality is very important in the synthesis of preceramic polymers. This thesis will be devoted to exploring several new organosilicon polymer systems.
Date:
December 31, 1996
Creator:
Zhao, G.
System:
The UNT Digital Library
Adult Discouragement: Traditonal College Students
This study resulted in the development of the Discouragement Scale for Adults (DSA), an assessment instrument for the Adlerian construct of discouragement in adults more than 18 years of age. The DSA is a 60-item instrument that contains five sub-scales corresponding to five life tasks identified in Adlerian literature as work, love, society, self, and spirituality. Age, gender, and ethnicity norms were established for the DSA using a diverse sample (N=586). Additional normative data was developed with a presumed discouraged sample (N=47), and a special sample of traditional college students aged 18-27 years (N=531). Findings on the norm sample indicated that females are less discouraged than males on the Total DSA and on society and spirituality sub-scales. The 18-34 year old group was more discouraged than other age groups on the Total DSA and on work, society, and spirituality sub-scales. Presumed discouraged sample findings indicated that females were less discouraged than males on the society sub-scale. College student findings indicated that females were less discouraged than males on the Total DSA and sub-scales of love, society, spirituality, and work. A significant difference was found among ethnic groups in self sub-scales. Students with no absences per week were less discouraged than …
Date:
December 1996
Creator:
Haggan, Paul S. (Paul Stephen)
System:
The UNT Digital Library
The Agolmirth Conspiracy
Written in the tradition of the classic spy novels of Ian Fleming and the detective novels of Raymond Chandler, The Agolmirth Conspiracy represents the return to the thriller of its traditional elements of romanticism, humanism, fast-moving action, and taut suspense, and a move away from its cynicism and dehumanization as currently practiced by authors such as John Le Carre' and Tom Clancy. Stanford Torrance, an ex-cop raised on "old-fashioned" notions of uncompromising good and naked evil and largely ignorant of computer systems and high-tech ordinance, finds himself lost in a "modern" world of shadowy operatives, hidden agendas, and numerous double-crosses. He is nevertheless able to triumph over that world when he puts his own honor, his own dignity, and his very life on the line, proving to himself and to his adversaries that such things can still make things easier to see amid today's swirling moral fog.
Date:
December 1996
Creator:
Elston, James C. (James Cary)
System:
The UNT Digital Library
An Analysis of the Determinants of Recovery of Businesses After a Natural Disaster Using a Multi-Paradigm Approach
This study examines the recovery process of businesses in Homestead, Florida after Hurricane Andrew in 1992. The goal of this study was to determine which organizational characteristics were useful in predicting the level of physical damage and the length of time to reopen for affected businesses. The organizational characteristics examined were age, size, pre-disaster gross sales, ownership of the business location, membership in the Chamber of Commerce, and property insurance. Three-hundred and fifty businesses in the area were surveyed. Because of the complexity of the recovery process, the disaster experiences of businesses were examined using three paradigms, organizational ecology, contingency theory, and configuration theory. Models were developed and tested for each paradigm. The models used the contextual variables to explain the outcome variables; level of physical damage and length of time to reopen. The SIC was modified so that it could form the framework for a taxonomic examination of the businesses. The organizations were examined at the level of division, class, subclass, and order. While the taxa and consistent levels of physical damage, the length of time needed to reopen varied greatly. The homogeneous level of damage within the groups is linked to similarity in assets and transformation processes. When …
Date:
December 1996
Creator:
Flott, Phyllis (Phyllis L.)
System:
The UNT Digital Library
The application of solid-state NMR spectroscopy to electrochemical systems: CO adsorption on Pt electrocatalysts at the aqueous-electrode interface
A fuel cell is an electrochemical energy conversion device, the continuous-flow analogue of the popular electrochemical storage device known as the battery. While the potential of fuel cells as power sources was recognized well over a century ago, they have since found limited application; a myriad of chemical, engineering and materials issues can be cited for this disappointing showing. Recent growing concern over the fate of the environment, however, has helped to renew interest in fuel cell research. This paper describes the methanol fuel cell and catalytic problems associated with the anode. On this task, the adsorption of carbon monoxide on platinum has been investigated.
Date:
December 1, 1996
Creator:
Yahnke, M. S.; Reimer, J. A. & Cairns, E. J.
System:
The UNT Digital Library
An Attitude Assessment of Amateur Musicians in Adult Community Bands
The purpose of this study was to ascertain certain factors which lead adults to participate in community band activity. This study attempted to answer the following questions: 1. What are the factors of rewards for community band participants based on the responses of a selected sample to validated attitude statements? 2. What are the relationships that might exist between certain demographic characteristics of the sample such as age, gender, education, occupation, musical training, geographic region (independent variables) and factors of participation (dependent variables) determined by principal components analysis? 3. What are the relationships that might exist between the findings of this study using member generated attitude statements and the findings of other attitude studies using researcher generated attitude statements? A 179-item survey was developed from an initital pool of 839 attitude statements after two pilot studies and an expert review. A randomly selected, stratified cluster sample of 74 organizational members of the Association of Concert Bands participated in the study. The average number of band members present during the survey process was 35. The average number of surveys returned per band was 23.66 for a return rate of 65.9% One thousand seven hundred twenty five individuals participated in the study. …
Date:
December 1996
Creator:
Spencer, William David, 1952-
System:
The UNT Digital Library
Bias in the Diagnosis and Treatment of Gay Males
The purpose of this study was to explore heterosexual bias in the diagnosis and treatment of gay males. Two hundred-fifty (134 males and 116 females) mental health professionals from the Division of Psychotherapy (29) of the American Psychological Association participated in the study. Participants were randomly assigned to one of two case history conditions, which presented a 35-year-old male seeking therapy. Both conditions were equivalent with regards to the presenting problem (i.e., diagnostic symptoms) with the exception of his significant other (i.e., gay vs. non-gay condition). Potential bias was measured through a diagnostic rating Likert scale and a treatment plan questionnaire. Other independent variables that could potentially have an effect on diagnostic ratings were explored, such as gender, year of graduation, and theoretical orientation of the respondents. Results of the statistical analyses failed to confirm evidence of heterosexual bias. Implications for further research and training are discussed.
Date:
December 1996
Creator:
Adams, Pamela (Pamela Ann)
System:
The UNT Digital Library
A Case Study of Faculty and Student Perceptions of a Campuswide Computer Network at a Small Liberal Arts College
This study was an examination of faculty and student perceptions of a campus-wide computer network at Cedarville College in Cedarville, Ohio. The most important conclusion of this study is that the computer network at Cedarville College has significantly impacted interactions between faculty and peers and faculty and students. It is recommended that a longitudinal study be conducted to explore the possibilities of the computer network and its importance to and impact on the teaching/learning process. It is also recommended that an evaluation program be set up to monitor the usefulness of the computer network to the teaching/learning process.
Date:
December 1996
Creator:
Morgan, Peter R. (Peter Ronald)
System:
The UNT Digital Library
Characterization of Aspartate Transcarbamoylase in the Archaebacterium Methanococcus Jannaschii
Asparate transcarbamoylase catalyzes the first committed step in the de novo synthesis of pyrmidine nucleotides UMP, UDP, UTP, and CTP. The archetype enzyme found in Escherichia coli (310 kDa) exhibits sigmodial substrate binding kinetics with positive control by ATP and negative control with CTP and UTP. The ATCase characterized in this study is from the extreme thermophilic Archaebacterium, Methanococcus jannaschii. The enzyme was very stable at elevated temperatures and possessed activity from 20 degrees Celsius to 90 degrees Celsius. M. Jannaschii ATCase retained 75% of its activity after incubation at 100 degrees Celsius for a period of 90 minutes. No sigmodial allosteric response to substrate for the enzyme was observed. Velocity substrate plots gave Michaelis-Menten (hyperbolic) kinetics. The Km for aspartate was 7 mM at 30 degrees Celsius and the KM for carbamoylphosphate was .125 mM. The enzyme from M. jannaschii had a broad pH response with an optimum above pH 9. Kinetic measurements were significantly affected by changes in pH and temperature. The enzyme catalyzed reaction had an energy of activation of 10,300 calories per mole. ATCase from M. jannaschii was partially purified. The enzyme was shown to have a molecular weight of 110,000 Da., with a subunit molecular …
Date:
December 1996
Creator:
Stewart, John E. B. (John Edward Bakos)
System:
The UNT Digital Library
Childhood Cancer: Maternal Stress and Coping
Sixty-two mothers of childhood cancer patients completed questionnaires on family demographics, parental stress, sense of parenting competence, self esteem, health locus of control, attitudes toward cancer, life events, social support, and psychological symptomatology. Correlation and regression procedures were used. Time since diagnosis and the severity rate of a child's illness did not predict the mother's sense of parenting competence, but a negative correlation at the $p<.01$ level between mothers' report of self esteem and their distress was revealed. Social support was negatively correlated at the $p<.01$ level with psychological distress, but life events were positively correlated at the $p<.01$ level. Internal locus of control was positively correlated with psychological distress, but attitudes toward cancer did not correlate with psychological distress.
Date:
December 1996
Creator:
Buenrostro, Martha
System:
The UNT Digital Library
Cognitive Complexity in Group Performance and Satisfaction
In this study, a comparison was made between the various levels of group cognitive complexity and its relationship to task performance and task satisfaction. The goal of this research is to answer the general question, "Should decision-making groups consist of individuals who are similar in the way they differentiate and/or integrate various stimuli in order to increase performance and satisfaction?" The preceding research problem was analyzed in a laboratory setting using a 2 X 2 factorial design blocked on the variable, cognitive complexity. The Repertory Grid was used to measure the cognitive complexity of 228 student subjects. These subjects were stratified into groups of three based on their cognitive complexity score on the Repertory Grid (Kelly, 1955). Each group was treated randomly with one of two levels of task complexity (complex or not complex). Moreover, the groups received an imposedgroup structure that incorporated centralized or decentralized decision-making. Results indicated that groups consisting of cognitively complex members outperformed groups consisting of noncomplex members. No support was obtained for the two-way interaction between group cognitive complexity and either task complexity or group structure. Support was obtained for the interaction between task complexity and group structure on both task satisfaction measures. The highest …
Date:
December 1996
Creator:
Mayer, Bradley Wayne
System:
The UNT Digital Library
A Critical Evaluation of the Religious Education Curriculum for Secondary School Students in Uganda
This study documents a critical evaluation of the religious education curriculum used in Uganda's secondary schools. The study focused on goals and objectives, methods, content, and public perception of religious education instruction. The evaluation was based on a qualitative investigation that employed three methods to collect data: document analysis, classroom observation, and interviews. The investigation was guided by a series of research questions that included the following: What are the overall goals and objectives of religious education instruction? What are the attitudes from the community regarding religious education? What are the roles of religious leaders during implementation of this curriculum? How does the curriculum prepare students for the pluralistic nature of the society? What qualifications and training do the teachers have? What are the politics involved in curriculum implementation? What is the philosophy of religious education instruction as defined by policy makers and how is it implemented?
Date:
December 1996
Creator:
Musiime, Reuben
System:
The UNT Digital Library
Dealignment Decades on: Partisanship and Party Support in Great Britain, 1979-1996
This dissertation surveys electoral change in Great Britain during the period between 1979 and 1996. It analyzes the long-term factors and the short-term dynamics underlying the evolution of three aspects of the electorate: party identification, voting intentions and party support in inter-election periods. Drawing on cross-sectional and panel data from the British Election Studies and public opinion polls, I investigate the impacts of long-term socialization and short-term perceptions on voters' political decisions. I hypothesize that, over the last four elections, perceptual factors such as evaluations of party leaders and issues, particularly economic concerns, emerged as the major forces that account for the volatility in electoral behavior in Britain. Accordingly, this study is divided into three sections: Part I probes into the evolution in party identification across age cohorts and social classes as illustrated in trends in partisanship. Part II focuses on changes in voting intentions as affected by perceptual factors and party identification. Part III investigates the public's support for governing parties by analyzing the dynamics of aggregate party support during inter-election periods.
Date:
December 1996
Creator:
Ho, Karl Ka-yiu
System:
The UNT Digital Library
Death and the Concept of Woman's Value in the Novels of Jane Austen
Jane Austen sprinkles deaths throughout her novels as plot devices and character indicators, but she does not tackle death directly. Yet death pervades her novels, in a subtle yet brutal way, in the lives of her female characters. Austen reveals that death was the definition and the destiny of women; it was the driving force behind the social and economic constructs that ruled the eighteenth-century woman's life, manifested in language, literature, religion, art, and even in a woman's doubts about herself. In Northanger Abbey Catherine Morland discovers that women, like female characters in gothic texts, are written and rewritten by the men whose language dominates them. Catherine herself becomes an example of real gothic when she is silenced and her spirit murdered by Henry Tilney. Marianne Dashwood barely escapes the powerful male constructs of language and literature in Sense and Sensibility. Marianne finds that the literal, maternal, wordless language of women counts for nothing in the social world, where patriarchal,figurative language rules, and in her attempt to channel her literal language into the social language of sensibility, she is placed in a position of more deadly nothingness, cast by society as a scorned woman and expected to die. Fanny Price …
Date:
December 1996
Creator:
Moring, Meg Montgomery, 1961-
System:
The UNT Digital Library
Design, Development, and Implementation of a Computer-Based Graphics Presentation for the Undergraduate Teaching of Functions and Graphing
The problems with which this study was concerned were threefold: (a) to design a computer-based graphics presentation on the topics of functions and graphing, (b) to develop the presentation, and (c) to determine the instructional effectiveness of this computer-based graphics instruction. The computerized presentation was written in Authorware for the Macintosh computer. The population of this study consisted of three intermediate algebra classes at Collin County Community College (n = 51). A standardized examination, the Descriptive Tests of Mathematics Skills for Functions and Graphs, was used for pretest and posttest purposes. Means were calculated on these scores and compared using a t-test for correlated means. The level of significance was set at .01. The results of the data analysis indicated: 1. There was a significant difference between the pretest and posttest performance after exposure to the computer-based graphics presentation. 2. There was no significant gender difference between the pretest and posttest performance after exposure to the computer-based graphics presentation. 3. There was no significant difference between the pretest and posttest performance of the traditional and nontraditional age students after exposure to the computer-based graphics presentation. Females had a lower posttest score than the mean male posttest score, but an analysis …
Date:
December 1996
Creator:
Karr, Rosemary McCroskey
System:
The UNT Digital Library
Development of a Discouragement Scale for Adults with Normative Data for Gay Males
According to Alfred Adler, founder of Individual Psychology, a feeling of inferiority is in some degree common to all people. People who are unable to overcome these inferiority feelings by striving for cooperation may become discouraged. Although there are three scales to measure social interest, no scales measuring discouragement for adults was found. Additionally, Adler held basic assumptions regarding homosexuality, and the findings suggest that the assumptions should be reexamined. The purpose of this study was twofold. First, three University of North Texas candidates developed a discouragement scale for adults 18 years of age and older, known as the Discouragement Scale for Adults (DSA). Discouragement was examined relative to the five life tasks. Second, this candidate normed the instrument for the scores of gay male subjects and compared it to the scores of the other subject groups. Since the emphasis was on developing the instrument and norming it for various subject groups, no hypothesis was developed. Data was collected on three subject groups, known as the general norm subjects, the discouraged subjects, and the gay male subjects. Analyses were performed on the scores. Among the analyses, it was found that gay male subjects were slightly more discouraged than the general …
Date:
December 1996
Creator:
Chernin, Jeffrey N.
System:
The UNT Digital Library
Development of a Personal Style
With this project I explored pottery forms of Bernard Leach and his apprentices. By exploring this work, it was my intention to expand my forms and address the following questions: 1. What Leach pottery forms were most compatible with my work methods and decoration? 2. What significant changes could I make to these Leach forms to adapt them to my own style of working character? 3. Would producing these adapted forms in two different clay bodies and using different methods to reflect landscape imagery lead to a style that I could call my own?
Date:
December 1996
Creator:
McKee, Joe Frank S.
System:
The UNT Digital Library
Development of a Watershed Prioritization Strategy Using Remote Sensing and the Geographic Resource Analysis Support System. Case study: City of Carrollton, Texas
This study used a geographic information system (GIS) and an empirical pollutant load model to estimate average annual pollutant loads contained in storm water charges from the City of Carrollton, Texas. The Geographic Resource Analyses Support System (GRASS) was used to create a number of spatial data layers as input variables to a model that estimates loads in Kilograms/Hectare/Year, and Kilogram/Basin/Year. Average annual pollutant loads for twelve pollutants were derived from average annual rainfall/runoff volumes, coupled with Local Dallas/Fort Worth Metroplex storm water Event Mean Concentrations.
Date:
December 1996
Creator:
Coffey, Jeffery M. (Jeffery Morgan)
System:
The UNT Digital Library
Development of an Intercultural Sensitizer for Cross-Cultural Training of American and Japanese Business Professionals
Increasing globalization and transnational trends in business have resulted in greater contact with people from different cultures. However, in any cross-cultural encounter, miscommunication and misunderstandings are likely to occur. In a workplace setting, these can seriously undermine job performance and employee relations. The Intercultural Sensitizer is a cross-cultural training tool that is designed to increase the likelihood that trained individuals will make accurate interpretations concerning behavior observed in individuals from other cultural groups (Albert, 1983) . The purpose of this study was two-fold: (1) to identify cultural differences between Americans and Japanese that can lead to misunderstandings in the workplace and hinder communication, and (2) to construct an intercultural sensitizer that will enable the two cultural groups to interact more effectively with each other. The study's five-phase research design was based on Albert's (1983) delineation of the construction of an intercultural sensitizer. Twenty-four episodes were constructed and statistically analyzed to determine if there was a difference in the way the two cultural groups responded to a given situation. Nine episodes yielded critical values significant at the .05 level. The study concluded that there while there are differences in the cultural perspectives of American and Japanese business professionals, the two groups …
Date:
December 1996
Creator:
Mehta, Gopika
System:
The UNT Digital Library
Differences in Anxiety Symptoms in First-Time and Multiple Incarcerates
This paper presents a study of the anxiety symptoms of first-time and multiple time incarcerates and the differences in number of symptoms. Vianey Reinhardt discusses the findings of the study conduced with 129 male offenders who were assessed through a series of tests.
Date:
December 1996
Creator:
Reinhardt, Vianey R.
System:
The UNT Digital Library
Discipline-Based Art Education as the Structural Support of a Language-Arts Intervention Program: Documentation of Cognitive Changes in Certain Elementary-Age Students
This study follows the progress of 11 elementary students who exhibited similar language-arts deficiencies and were treated with traditional and non-traditional language-arts remediation methods. Non-traditional methods were exclusively Discipline-Based Art Education (DBAE) lessons that required students to observe, talk about, and write about art images using a DBAE framework. Portfolios maintained by the students during one complete school year included writings and art production. Writings were marked using a color-coding system developed for the research project and designed to track growth in art cognition. Interviews for affective measure and the Test of Non-Verbal Intelligence, Edition II were administered as pre- and post-tests. Evidence indicated art understanding improved as cognition in language arts improved. Change in attitudes toward art and artists demonstrated a slight positive change. No significant difference was detected in non-verbal intelligence.
Date:
December 1996
Creator:
Stephens, Pamela Geiger
System:
The UNT Digital Library