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A Comparison of the Effectiveness of an Abstract and a Concrete Approach in Teaching Selected Algebraic Concepts to Ninth and Tenth Grade Students

Description: One purpose of this study was to determine whether any differences in immediate achievement or retention existed between students using manipulatives and students not using manipulatives. Also addressed in this study is whether or not the use of manipulatives is more beneficial for girls than boys and whether the use of manipulatives is more beneficial for low-ability students than for high-ability students. Students selected for this study were from a large suburban school district in Texas. The students were from eight intact classes, four of which were designated as the experimental group and the other four as the control group. The sample consisted of one hundred eighty-seven students. All students were tested with a test developed by the researcher. This same test was administered as a pretest, posttest, and retention test. The following supplemental data were also gathered on the students: mathematics scores from the California Test of Basic Skills and scores from the mathematics section of the Texas Educational Assessment of Minimum Skills test. Analysis of the data revealed no statistical difference in the mean scores of students instructed with or without manipulatives when the test was administered immediately after instruction. Nor was there any statistical difference in the mean scores when the test was administered two months after instruction. There was no statistical difference in the mean gain scores from the pretest to the posttest between boys and girls or between high- and low-achieving students. Nor was there any statistical difference between the mean gain scores from the pretest to the retention test between boys and girls or between high- and low-achieving students. It is recommended that further studies be conducted to investigate achievement and retention of students using manipulatives at the secondary level. It is also recommended that variables other than achievement be studied to determine the …
Date: May 1989
Creator: Wohlgehagen, James L. (James Lee)
Partner: UNT Libraries
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The Voice of the Composer: Theory and Practice in the Works of Pietro Pontio, Volume 1

Description: The life, music, and theoretical writings of Pietro Pontio (1532-1596) yield considerable insight into questions of theory and practice in the late sixteenth century. The dissertation places Pontio within his musical and cultural milieu, and assesses his role as both theorist and composer. Volume Two presents an annotated works list for Pontio's compositions, transcriptions of archival documents used in the study, and transcriptions of representative musical compositions.
Date: December 1989
Creator: Murray, Russell Eugene
Partner: UNT Libraries
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A Study of College Stress and Its Measurement

Description: The purpose of the study was to compare the academic stress of freshmen in a community college with that of freshmen in a university. An additional purpose was to determine if gender, ethnicity, or semester course load was related to perceived academic stress. The sample consisted of a total of 303 university and community college freshmen from English and Psychology classes at the University of North Texas and Richland Community College during the spring semester, 1989. The instrument that was administered to these volunteer students was the Academic Stress Test, a 35-item checklist of possible academic stressors. The students were asked to check the items which were perceived by them to be stressful and had occurred during the current semester. The T-statistic was used to analyze the total mean stress score for each variable being considered. Multiple regression was used to determine if there was any possibility that the variables might have a predictive effect for academic stress. It was found that for these freshmen students there was a significant difference between the perceived academic stress of community college freshmen and university freshmen. The mean academic stress score for university freshmen was higher than the mean for community college freshmen. Likewise, the perceived academic stress of females was significantly higher than that of males, and higher for those taking more semester hours than for those taking fewer semester hours. There was found to be no significant difference in the perceived academic stress of white and non-white freshmen college students.
Date: August 1989
Creator: Garrett, Sandy, 1945-
Partner: UNT Libraries
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The Political and Administrative Role of Planning and Budgeting in Saudi Arabia: Adaptation for Rapid Change

Description: This study examines the political and administrative role of planning and budgeting in Saudi Arabia. It demonstrates how they have contributed to lessening the political crises of distribution, participation, and penetration that confront developing countries. The study also investigates how these two bureaucratic processes have helped adapt rapid changes in a manner acceptable to the cultural milieu. In addition, the study explores the politics of planning and budgeting and identifies the roles various actors play. The evolution and institutionalization of planning and budgeting are examined through printed materials and interviews with planners and budgeters in the Ministries of Planning and Finance. In addition, a number of the Ulama, businessmen, former government bureaucrats, officials of key ministries and agencies, and media were interviewed in an attempt to understand how they interact in the politics of planning and budgeting.
Date: December 1989
Creator: Al-Kahtani, Mohammed S. A. (Mohammed Saeed A.)
Partner: UNT Libraries
open access

A Comparison of Academically At-Risk Students in Coordinated Vocational Academic Education Cooperative Education Programs With Non-Vocational Academically At-Risk Students

Description: The research problem was to determine the perceived mean self-concept attitudes of academically at-risk students in Coordinated Vocational Academic Education (CVAE) cooperative education programs with at-risk students in regular academic programs as measured by the Piers-Harris Children's Self-Concept Scale.
Date: December 1989
Creator: Mosier, Virginia L. (Virginia Lou)
Partner: UNT Libraries
open access

The Relationship between Personality Type and Marital Satisfaction Using the Myers Briggs Type Indicator and the Marital Satisfaction Inventory

Description: The relationship between personality type as measured by the Myers Briggs Type Indicator (MBTI) and marital satisfaction as measured by the Marital Satisfaction Inventory (MSI) was examined in this research. Subjects were 100 volunteer couples from a southwestern urban area who were given the MBTI and the MSI. These couples were divided into three groups: 40 were in marital therapy; 30 had satisfactory marriages and had been married seven years or less; 30 also had satisfactory marriages, but had been married more than seven years. The therapy group and the satisfactorily married groups were compared as to the number of MBTI preferences held in common, the strength of these preferences and the length of time married. The extraversion-introversion (E-I) scale and the sensing-judging (S-J) temperament of the MBTI were examined by comparing the spousal combinations in each of the groups. Chi square analysis and a Pearson correlation were used. A one-way analysis of variance was run between six of the scales of the MSI and each of the four MBTI dimensions. A MANOVA was attempted on the relationship between the spousal MBTI combinations and the six MSI scales, but the population was too small for this analysis to be conclusive. There were no significant differences between the groups as far as number of preferences held in common, length of time married, and the sensing-judging temperament. There were significantly more couples in the therapy group who had differences of 40 or more points on the four MBTI scales. The extent of the difference on the sensing-intuitive (S-N) scale was found to discriminate between satisfactory and unsatisfactory marriages. Differences on the E-I scale were found to effect couples' satisfaction in the MSI scales of Time Together and Affective Communication with the combination of introvert with introvert having the most difficulty in these …
Date: December 1989
Creator: Hicks, Mary E. (Mary Elizabeth)
Partner: UNT Libraries
open access

The Prediction of Homophobic Attitudes among College Students

Description: A review of the literature on homophobia indicates that negative attitudes toward homosexuals and homosexuality have been empirically related to numerous socio-demographic and attitudinal variables. Research to this date has focused on the relationship between individual variables and homophobia rather than examining multiple variables simultaneously. The purpose of the present investigation was to identify the factors which are predictive of homophobia. One hundred and ninety-four female and 115 male participants completed a biographical information questionnaire requesting socio-demographic information, self-proclaimed religiosity, frequency of church attendance, self-proclaimed political orientation, and political party identification. Participants also completed measures of attitudes toward male homosexuality, attitudes toward lesbianism, attitudes toward women, authoritarianism, sex anxiety, sexual attitudes, and socio-economic status. Statistical treatment of the data through principal components analysis indicated that homophobic attitudes are best predicted by a factor identified as "conservatism". Other factors were identified which predicted homophobia to a lesser extent. Male participant gender was determined to predict homophobia toward male homosexuals, but gender was not found to predict homophobic attitudes toward lesbians.
Date: August 1989
Creator: Schatman, Michael E. (Michael Edward)
Partner: UNT Libraries
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The Curricular Content of Elementary Music in China Between 1912 and 1982

Description: The purpose of this study was to investigate the curricular content of elementary music in China between 1912 and 1982. The questions addressed were: (1) What changes in elementary music resulted from China's becoming a republic in 1912? (2) What changes in elementary music resulted from China's becoming a socialist country in 1949? (3) What changes in elementary music in the People's Republic of China resulted from the Anti—Rightist Struggle Movement in 1957? (4) What changes in elementary music in the People's Republic of China resulted from the Cultural Revolution (1966-1976)? (5) Have changes occurred in elementary music in the People's Republic of China since the beginning of the reform movement in 1978? (6) Did any of the changes affect curricular goals, contents, methods, required materials, and instruction time allotted in a like manner, or did some of these components remain the same while others changed? (7) Were the changes important enough to attribute them to a changed political ideology? After translating all pertinent documents, the goals, contents, methods, materials, and time allotted for the elementary music curricula between 1912 and 1982 were listed and identified. Subsequently, the areas of focus within those categories as well as changes in focus were identified and their importance determined. The findings were: (1) all important curricular changes occurred after 1950; and (2) changed goals resulted in changed teaching techniques; however, changed teaching techniques did not result in the changing of goals.
Date: December 1989
Creator: Ma, Shuhui
Partner: UNT Libraries
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Factors Influencing Student Achievement in Texas

Description: This study examines the relationships among student socioeconomic status, school district enrollment, minority enrollment, district expenditure per pupil, and the teaching experience of faculty as these variables influence the achievement scores of secondary students in Texas. Data from a total of 1,061 Texas school districts were used to determine the effects of the indicated district-level predictor variables on three criterion variables: reading, mathematics, and writing scores for the 11th-grade Texas Education Assessment of Minimum Skills (TEAMS). The study led to the following conclusions: 1. Low socioeconomic status of students in Texas, as in the rest of the United States, insures that test scores will be lower if all other variables are held constant. 2. Large minority populations are strong predictors of low test scores, especially in mathematics and reading. 3. Students in districts whose faculty had a high average of years of teaching experience also scored high in achievement tests, especially in mathematics and writing. 4. High average district expenditure per pupil predicts high test scores, especially in reading. 5. School district size or enrollment has low predictive value of test scores. Among several specific recommendations, this study advises that further study be done concerning the most effective ways to educate minority and socioeconomically disadvantaged student populations. The study also recommends that better ways be found to retain experienced teachers in the classroom, including monetary compensation, extra allowances for staff development, and additional resources. The study cautions against simply adding money to a district's budget to increase student achievement scores, asserting that districts should make thorough studies before higher expenditures per pupil are alone used to increase test scores.
Date: May 1989
Creator: Pickering, Sarah Kelley
Partner: UNT Libraries
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A Historical Study of the Impact of the Christian Development on the Contributions of Frank C. Laubach in Literacy Education

Description: Frank C. Laubach made substantial contributions both to literacy education and the Christian life. There were between sixty and one hundred million people who learned to read through his literacy campaigns. He traveled to 130 countries developing literacy primers in 312 languages. At the same time, Laubach was a missionary mystic, spiritual experimenter and leader among Protestant Christians. The purpose of this study was to examine the relationship between two important parts of Laubach's life: his Christian development and literacy education. The study presents an overview of the family and social background of Frank C. Laubach from a chronological framework. Additional chapters examine: the importance of i-he Christian disciplines in Laubach's life, the impact of the missionary call and Laubach's concern for Christian social responsibility. The final chapter summarizes and evaluates the research. Both the Laubach collection, found in the George Arents Research Library at Syracuse University in Syracuse, New York, and the library at Laubach Literacy International in Syracuse, provided the resources for comprehensive research in the life of Frank C. Laubach.
Date: December 1989
Creator: Lawson, J. Gregory (James Gregory)
Partner: UNT Libraries
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The Development of the University of the Thai Chamber of Commerce, Bangkok, Thailand

Description: The purpose of this study was to describe the development of Thailand's oldest private university, the University of the Thai Chamber of Commerce, Bangkok, Thailand, from 1963 to 1987. This historical research used records and documents which are primary sources from the University of the Thai Chamber of Commerce and the Association of Private Higher Education Institutions of Thailand together with interviews with the chairman of the Thai Chamber of Commerce, president, faculty and staff of the University of the Thai Chamber of Commerce. Secondary sources were reports and publications from the Ministry of University Affairs and libraries in Thailand. The areas of emphasis in the study were government policies on private higher education, legislation that initiated the founding of the University, the founder, the university's goals, the university's organizational structure, financial sources, admission policies, physical plants, programs, faculty and students. It was found that the Thai government encourages the establishment of private higher education institutions. The Private Higher Educational Institution Act of 1979 was enacted to allow Private universities to be equal to government universities. The university of the Thai Chamber of Commerce was founded by the Thai Chamber of Commerce with the purpose of training Thai students for the business sector and promoting the economic stability of the nation. The university's organizational structure is centralized and is self-supporting. The university strives for academic excellence, and thus supports the development of the nation. Suggestions for further study include: (a) the study of private higher education institutions which were established with all of the various fields of study in place, and (b) a study to identify factors that will contribute to the future development of the university of the Thai Chamber of Commerce and other private universities in Thailand.
Date: December 1989
Creator: Orachorn Arthabowornpisan
Partner: UNT Libraries
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An Exploratory Investigation of Socio-Economic Phenomena that May Influence Accounting Differences in Three Diverse Countries

Description: This dissertation attempts to provide an exploratory structure to respond to, and tries to resolve, an existing void in international accounting research. The void is a lack of coherently structured, nation-specific, descriptive research to investigate socio-economic phenomena which may influence financial accounting. This dissertation's salient features include a political economy theory, an exploratory, sociological method, and a case study format. The political economy of accounting, introduced by Tinker [1980] and refined by Cooper and Sherer [1984], emphasizes a persuasive social relations dimension. This theory motivates selection of three countries (the United States, France, and Japan) that appear to have divergent socio-cultural environments. An exploratory and analytical approach of modified (enlarged) exogenism, developed by Smith [1973, 1976] and adapted to accounting by McKinnon [1986], provides an analytic structure for this exploratory investigation. Modified exogenism focuses upon an open, dynamic social system (the process of financial accounting), and provides analysis reflecting four major areas (the environment, intrusive events, intra-system activity, and trans-system activity). After examining the nation-specific financial accounting (socio-economic) structures for each country, an analysis of selected financial disclosures attempts to gain a better understanding of how socio-economic factors have influenced the development of financial accounting. My primary objective is to attempt to provide some insight about ,how diverse socio-political factors have impacted the development of financial accounting in three countries. Library research of nation-specific literature attempts to extract a relatively accurate picture of social, political, and economic institutions and policies, and relates such findings to financial accounting processes for each nation. This dissertation attempts to provide a necessary foundation for future theoretical international accounting harmonization studies.
Date: August 1989
Creator: Hudack, Lawrence R. (Lawrence Ralph)
Partner: UNT Libraries
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Job Satisfaction among Faculty Members at Six Metropolitan Area Teachers Colleges in Bangkok, Thailand

Description: The purpose of study was to compare job satisfaction and job dissatisfaction among faculty members at six teachers colleges in the Bangkok metropolitan area with respect to age, gender, length of experience, level of education, administrative position, academic rank, department, faculties, and salary. The findings of this research were compared with previous studies of Vatthaisong (1982) and Karoonlanjakorn (1986), which measured job satisfaction among faculty members in the Northeastern part and in the non-metropolitan areas of Central Thailand. Additionally, this inquiry expanded the two previous studies and speculated on the possibility that Herzberg's two-factor theory is adaptable to Thai faculty members in Thailand. The instrument consisted of ten demographic items and a 67-statement questionnaire. The questionnaire was based on Herzberg's two-factor theory, and used a five-point rating scale for ten facets of job satisfaction/dissatisfaction. The total stratified random sampling population was made up of 400 faculty members from six teachers colleges in the Bangkok metropolitan area. The returned rate for questionnaires was 383 (95.75%). Frequency, percentage, mean, t-test, one-way analysis of variance, and Scheffe method were used for analyses. The level of significance was set at .05. The findings of this study indicated that faculty members with high ages, high work, experiences, high salaries, high academic ranks, high levels of education, and high administrative positions were more satisfied with their jobs than faculty members with lower rankings in these demographic variables. Male faculty members were more satisfied than female faculty members. The results of this research were similar to Vatthaisong's and different from Karoonlanjakorn's. The faculty members of Vatthaisong's inquiry and those of the present study were satisfied with their jobs in every facet except salary, while Karoonlanjakorn's findings reported that no areas of dissatisfaction were revealed. Because the factors described in Herzberg's theory were not the same as those …
Date: May 1989
Creator: Suntharin Thanagosai
Partner: UNT Libraries
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Developing Social Interest in Juvenile Delinquents

Description: Male youths ages 13-18 incarcerated at two minimum security detention facilities participated in a program to determine if Alfred Adler's concept of social interest could be developed through group interactions led by non-professionals. The youths answered a self-report attitudinal scale, the Sulliman Scale of Social Interest and were rated by their classroom teachers on the Behavior Dimensions Rating Scale as pre-test measures. Volunteers from a liberal arts college sociology classes were randomly assigned to work in male-female pairs over a ten week period of time with the experimental population. These pairs led their constant group of incarcerated youths in ninety minute discussion sessions once per week for the duration of the program. Structured human relations exercises specifically designed to encourage elements of social interest; belonging, cooperation, and significance were assigned for each of the sessions. At the end of ten weeks, the youths in the experimental groups and the control population were tested again on the two scales. The results of Pearson Product Moment Correlations Test indicated no relationship between attitude and behavior for either the experimental or control groups on the pre-test and the post-test. A Mann Whitney U t-test indicated a highly significant increase in the social interest of the experimental group at the end of the program. While the control group showed no change over the course of the ten weeks, those who participated in the developmental groups increased their scores on the Sulliman Scale of Social Interest by an average of 12 points. Another Mann Whitney U t-test indicated that there was no difference between the social interest of Caucasian and non-Caucasian youths.
Date: August 1989
Creator: Eldridge, Connie
Partner: UNT Libraries
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The Nineteenth-Century German Tradition of Solo Trombone Playing: A Lecture Recital, Together with Three Recitals of Selected Works of E. Bozza, W. Hartley, A. Frackenpohl, A. Pryor. G. Frescobaldi. L. Grondahl, P. Bonneau and Others

Description: This study deals with trombone soloists and music of nineteenth-century Germany. Much of the discussion is based on the influence of two trombone virtuosos, Carl Traugott Queisser (1800-1846) and Friedrich August Belcke (1795- 1874) . Finally, a style and form analysis is given of several representative trombone compositions of the period. These include Ferdinand David's Concertino. Op. 4, Friedebald Grafe's Concerto. and Josef Serafin Alschausky's Concerto No. I.
Date: August 1989
Creator: Wolfinbarger, Steve M.
Partner: UNT Libraries
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The Stoneflies (Plecoptera) of the Ozark and Ouachita Mountains

Description: Collections of stoneflies (Plecoptera) were made at 603 stream sites from Nov. 1983 - May 1988 in the Ozark-Ouachita Mountain region, in relation to physiographic and vegetational characteristics. Examination of approximately 9000 vials from these collections, supplemented with material from major museums and other collectors, revealed 88 stonefly species in 8 families and 24 genera. Pearson's measure of association (R) showed there was a significant association between species present and each of the tested variables.
Date: December 1989
Creator: Poulton, Barry C. (Barry Charles)
Partner: UNT Libraries
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Analysis of Critical Skills Used By Educators of Students With Autism

Description: A review of the literature indicated that critical skills needed by educators of students with autism had not been sufficiently identified. Research efforts using survey instruments appeared to offer a method for gathering data in order to develop and analyze a comprehensive list of critical skills for educators of students with autism. A survey instrument was developed in bifurcate format that required respondents to rate 118 skill items according to Importance and Proficiency. Two Likert-type scales were provided to enable respondents to record their perceptions of Importance and Proficiency. The instrument was mailed to a nationwide stratified sample of educators of students with autism. A total of 90 surveys were mailed with 52 (57%) returned. Four hypotheses and two research questions were developed. Data were analyzed using MANOVA to test for significant differences among the four geographic regions of the United States and within ten skill areas. The findings did not support the hypotheses; therefore, all hypotheses were rejected. In further analysis utilizing the ANOVA and Chi-Square procedures, significant differences among some regions and within some of the skill areas were found. The findings suggest that educators from the four regions tended to differ in regard to Importance and Proficiency for certain skill items. Findings led to recommendations being given relevant to future research on critical skills needed for teachers in the field of autism.
Date: August 1989
Creator: Bunsen, Teresa Dawn
Partner: UNT Libraries
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A Descriptive Study of Personnel Decisions Appealed to the Texas State Commissioner of Education August 1981 - August 1986

Description: The problem. --The problem in this study was to describe the issues arising in employment decisions appealed to the Texas Commissioner of Education. Decisions made in courts are binding on school officials, and they are published in law reporters found in most libraries. The Commissioner's decisions are also binding on school officials, but they are not published or widely reported. Thus, this important body of information may not reach those who are responsible for its application. Methods. --The decisions of the Commissioner were examined to determine the issues and the underlying rationale used by the Commissioner in the process of deciding the appeals. A series of data reductions allowed a determination of patterns found in the outcomes of the decisions which favored the employee and those which favored the school districts. The analysis produced a set of data from which implications for decision making could be drawn.
Date: May 1989
Creator: Hughes, N. Sue Cothran
Partner: UNT Libraries
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Historic Sites in Texas: the Use of Local History in Texas Public Schools

Description: This research study examined the perceptions of school administrators and of historic site directors toward the function of the sites in the public school curriculum. In-depth, personal interviews were conducted, tape-recorded, and transcribed at six selected sites, representing the various ethnic historic settlements of Texas, a variety of population densities, each of the major physical geographic regions, and different economic levels in the state. Data analysis involved careful study of the taped interviews, comparisons of responses given by people of similar roles, and comparisons of responses regarding the same site. Documentation of elements of the historic sites, of programs offered, of participation of the local school district in programs, and of written school policies were examined. The perceptions of the interviewees along with recommendations for changes were noted. Responses varied from expressed impression of students who are steeped in local history and are bored with their heritage, to enthusiastic positive opinions that the prosperity of the community is directly related to the strong identification of the citizens with its local history. The role of local history and of specific sites in the curriculum of the public schools is not consistent in Texas. This research study suggests that positive gains are possible if communication between local historic site/park/museum personnel and professional educators who are responsible for planning and implementation of school curriculum can be improved. Professional educators tend either to value local history and historic sites as part of the curriculum, or to avoid the question of meeting state mandates for classtime through the use of off-campus visits to historic sites by interpreting recent reforms to prohibit them. Professional personnel who oversee the historic sites tend to offer programs to the public schools that will meet the mandated curriculum, while adhering to the scheduling constraints of school reform legislation.
Date: May 1989
Creator: Pitchford, Anita
Partner: UNT Libraries
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Thermionic converter emitter support arrangement

Description: This document discusses a support provided for use in a thermionic converter to support an end of an emitter to keep it out of contact with a surrounding collector while allowing the emitter end to move axially as its temperature changes. The emitter end is supported by a spring structure that includes a pair of Belleville springs, and the spring structure is supported by a support structure fixed to the housing that includes the collector. The support structure is in the form of a sandwich with a small metal spring-engaging element at the front end, a larger metal main support at the rear end that is attached to the housing, and with a ceramic layer between them that is bonded by hot isostatic pressing to the metal element and metal main support. The spring structure can include a loose wafer captured between the Belleville springs. 7 figs.
Date: July 6, 1989
Creator: Allen, D.T.
Partner: UNT Libraries Government Documents Department
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The central drift chamber for the D0 experiment: Design, construction and test

Description: A cylindrical drift chamber has been designed and built at the State University of New York at Stony Brook. This chamber is to be installed in the D0 detector which is being completed at the Fermi National Accelerator. In this dissertation the design, construction and testing of this chamber are described. The characteristic features of this chamber are cells formed by solid walls and a modular structure. Much discussion is given to the performance of and results from a chamber made from three final modules which was installed in the D0 interaction region during the 1988/1989 collider run. Using this chamber proton anti-proton interactions were measured at the D0 interaction point.
Date: August 1, 1989
Creator: Behnke, T.
Partner: UNT Libraries Government Documents Department
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A small low energy cyclotron for radioisotope measurements

Description: Direct detection of {sup 14}C by accelerator mass spectrometry has proved to be a much more sensitive method for radiocarbon dating than the decay counting method invented earlier by Libby. A small cyclotron (the cyclotrino'') was proposed for direct detection of radiocarbon in 1980. This combined the suppression of background through the use of negative ions, which had been used effectively in tandem accelerators, with the high intrinsic mass resolution of a cyclotron. Development of a small electrostatically-focused cyclotron for use as a mass spectrometer was previously reported but the sensitivity needed for detection of {sup 14}C at natural abundance was not achieved. The major contributions of this work are the integration of a high current external ion source with a small flat-field, electrostatically-focused cyclotron to comprise a system capable of measuring {sup 14}C at natural levels, and the analysis of ion motion in such a cyclotron, including a detailed analysis of phase bunching and its effect on mass resolution. A high current cesium sputter negative ion source generates a beam of carbon ions which is pre-separated with a Wien filter and is transported to the cyclotron via a series of electrostatic lenses. Beam is injected radially into the cyclotron using electrostatic deflectors and an electrostatic mirror. Axial focusing is entirely electrostatic. A microchannel plate detector is used with a phase-grated output. In its present form the system is capable of improving the sensitivity of detecting {sup 14}C in some biomedical experiments by a factor of 10{sup 4}. Modifications are discussed which could bring about an additional factor of 100 in sensitivity, which is important for archaeological and geological applications. Possibilities for measurements of other isotopes, such as {sup 3}H, and {sup 10}Be, and {sup 26}Al, are discussed. 70 refs.
Date: November 1, 1989
Creator: Bertsche, Kirk Joseph
Partner: UNT Libraries Government Documents Department
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Jet Production in the Central Rapidity Region in 1.8 TeV Proton and Antiproton Collisions

Description: In this thesis we study the jet production cross section in the central rapidity region in {bar p}p collisions at a center of mass energy of 1.8 TeV. The pseudo-rapidity {eta} is defined as {eta} {triple_bond} -ln(tan({theta}/2)), where {theta} is the angle between the directions of the jet momentum and the proton beam. We will call the region -0.7 < {eta} < 0.7 the 'central rapidity' region by definition. The goal of this thesis is to determine two kinds of differential cross sections for jet production: an inclusive jet Et distribution d{sigma}/dEt, and the distribution in invariant mass d{sigma}/dM{sub JJ} of two jet systems. These spectra serve to check the strong interaction theory, and thus to look for new phenomena, at the highest available energy. The strong interaction theory will be discussed.
Date: June 1, 1989
Creator: Tsai, Yeong-Dong
Partner: UNT Libraries Government Documents Department
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