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Calculation of transport coefficients in an axisymmetric plasma (open access)

Calculation of transport coefficients in an axisymmetric plasma

A method of calculating the transport coefficient in an axisymmetric toroidal plasma is presented. This method is useful in calculating the transport coefficients in a Tokamak plasma confinement device. The particle density and temperature are shown to be a constant on a magnetic flux surface. Transport equations are given for the total particle flux and total energy flux crossing a closed toroidal surface. Also transport equations are given for the toroidal magnetic flux. A computer code was written to calculate the transport coefficients for a three species plasma, electrons and two species of ions. This is useful for calculating the transport coefficients of a plasma which contains impurities. It was found that the particle and energy transport coefficients are increased by a large amount, and the transport coefficients for the toroidal magnetic field are reduced by a small amount.
Date: January 1977
Creator: Shumaker, Dana E.
System: The UNT Digital Library
Development and evaluation of a hydride technique for As, Sb, and Se determinations by inductively coupled plasma-atomic emission spectroscopy (open access)

Development and evaluation of a hydride technique for As, Sb, and Se determinations by inductively coupled plasma-atomic emission spectroscopy

A literature review of hydride techniques, experimental facilities, development and evaluation of a hydride technique, and interelement effects are covered. Suggestions for future work are given. (LK)
Date: January 1, 1977
Creator: Sloat, S. S.
System: The UNT Digital Library
Two-state and two-state plus continuum problems associated with the interaction of intense laser pulses with atoms (open access)

Two-state and two-state plus continuum problems associated with the interaction of intense laser pulses with atoms

Two mathematical methods are utilized (one a form of adiabatic approximation, and the other closely related to the Zener method from collision theory) in order to calculate the probability of three-photon ionization when strong counter propagating pulses are tuned very near a two-photon resonant state. In this case the inverted populations predicted by Grischkowsky and Loy for smooth laser pulses lead to larger ionization probabilities than would be obtained for a square pulse of equal peak power and energy per pulse. The line shape of the ionization probability is also quite unusual in this problem. A sharp onset in the ionization probability occurs as the lasers are tuned through the exact unperturbed two-photon resonance. Under proper conditions, the change can be from a very small value to one near unity. It occurs in a very small frequency range determined by the larger of the residual Doppler effect and the reciprocal duration of the pulse. Thus, the line shape retains a Doppler-free aspect even at power levels such that power broadening would dwarf even the full Doppler effect in the case of a square pulse of equal energy and peak power. The same mathematical methods have been used to calculate line …
Date: February 1, 1977
Creator: Choi, C. W. & Payne, M. G.
System: The UNT Digital Library
Electron Transfer at Sensitized Semiconductor Electrodes (open access)

Electron Transfer at Sensitized Semiconductor Electrodes

Electron transfer from the excited state of sensitizing dyes to the conduction band of semiconductors has been studied through photoelectrochemical techniques. Two systems were analyzed in detail: rhodamine B on ZnO and rose bengal on TiO/sub 2/. Prior to electrochemical experimentation, the adsorption characteristics of these dyes were investigated using ZnO, ZnS, and TiO/sub 2/ single crystals as substrates. Absorbance measurements of the adsorbed dye were taken as a function of the solution concentration of the dye. Adsorption isotherms heats of adsorption were also established; they were similar to literature data reported for adsorption of these dyes on powdered substrates. Using the absorbance data, the quantum efficiency for photoinjection of electrons from rhodamine B into a ZnO electrode was determined to be 2.7 x 10/sup -2/. This value was independent of the dye surface concentration down to 50% coverage of the electrode. With the assumption that not all of the rhodamine B adsorbed on the electrode has the same rate of electron injection, a kinetic model for the time decay of the photocurrent was developed; data were analyzed according to this theory. A rate constant for photoreduction of the adsorbed dye was determined for the reducing agents. 86 references.
Date: March 1977
Creator: Spitler, Mark Thomas
System: The UNT Digital Library
Nucleation and dynamics of vortices in type-II superconductors (open access)

Nucleation and dynamics of vortices in type-II superconductors

The one- and two-dimensional Ginzburg-Landau equations are numerically integrated in a slab geometry, which is appropriate for comparison to experimental work done on films. When two-dimensional variations become energetically favorable, a vortex is found to nucleate and move to the center of the film with the Gibbs free energy decreasing during the process. An important process by which the energy is lowered during this nucleation procedure is found to be the savings in condensation energy arising from the shrinking size of the vortex core as it moves to the center of the film. The solutions of the Ginzburg-Landau equations are used to explain anomalies observed experimentally in the tunneling characteristics of thin films of PbIn. Excellent agreement between theory and experiment is found with the Ginzburg-Landau equations correctly predicting the field at which flux would first enter the films. We then use the Clem model of an isolated vortex to model vortex nucleation and dynamics under the influence of a transport current. The entry fields predicted by the model are found to be off by almost a factor of two but have the advantage of requiring simple computer programs for their solution, while the Ginzburg-Landau solutions require substantially more numerical …
Date: March 1, 1977
Creator: Balley, R. E.
System: The UNT Digital Library
Admission of foreign graduate students: an analysis of judgments by selected faculty and administrators at North Texas State University (open access)

Admission of foreign graduate students: an analysis of judgments by selected faculty and administrators at North Texas State University

The problem of this study was to determine by means of Judgment Analysis (JAN) Technique the admission policies of selected faculty and administrators for foreign graduate students at North Texas State University.
Date: May 1977
Creator: Gharavi, Ebrahim
System: The UNT Digital Library
Alternate coupling routes in carbon-13--carbon-13 coupling (open access)

Alternate coupling routes in carbon-13--carbon-13 coupling

With a large number of carbon-carbon spin-spin coupling constants now determined and the dihedral angle dependence of vicinal coupling constants reported, application of this coupling constants data was attempted to a conformational study.
Date: May 1977
Creator: Faehl, Larry G.
System: The UNT Digital Library
El amor como fuerza motivadora en la vida y obra poética y dramática de Gertrudis Gómez de Avellaneda (open access)

El amor como fuerza motivadora en la vida y obra poética y dramática de Gertrudis Gómez de Avellaneda

This thesis presents a study of events in the life of Gertrudis Gómez de Avellaneda, a lyric poetess and dramatist during the Romantic period, as motivating forces in her literary career. As might be expected in the case of a true representative of the Romantic period, Avellaneda's passions and personal life are reflected in all of her works. She uses human and divine love as the main themes throughout all of her literary production, especially in her lyric poetry and the four tragedies chosen for this study: Munio Alfonso (1844), El Príncipe de Viana (1844), Saúl (1849), and Baltasar (1858).
Date: May 1977
Creator: Milián, Marta Lucrecia
System: The UNT Digital Library
Analysis and Evaluation of the Role of Public Relations in Leasing Dallas Petroleum Center (open access)

Analysis and Evaluation of the Role of Public Relations in Leasing Dallas Petroleum Center

The problem in this study was to discover if the public relations program of the Dallas Petroleum Center was useful in leasing and if the program played a significant role in a leasing increase. The study was carried out by describing the development of the building project, by analyzing the planning and execution of the public relations program, by testing the program's effectiveness, and by drawing conclusions about the program and by making recommendations for this specific program and for office leasing in general. The effectiveness of the program was tested by questionnaires and interviews. The public relations program proved to be an effective tool in leasing office space; and a similar program was recommended for other buildings.
Date: May 1977
Creator: Ainsworth, Doris Stewart
System: The UNT Digital Library
Analysis for Performance of the Song Cycle Songs of Travel, by Ralph Vaughan Williams (open access)

Analysis for Performance of the Song Cycle Songs of Travel, by Ralph Vaughan Williams

This paper analyzes Ralph Vaughan Williams' Songs of Travel and asserts that the songs are a song cycle rather than just a collection of songs set to to the poetry of Robert Louis Stevenson. Richard Porter Cole performs a musical and poetic analysis of the songs and makes suggestions to aid performers of the piece.
Date: May 1977
Creator: Cole, Richard Porter
System: The UNT Digital Library
An Analysis of Community Attitudes Toward the "Bowie News" as a News-Advertising Medium (open access)

An Analysis of Community Attitudes Toward the "Bowie News" as a News-Advertising Medium

This study measured attitudes of newspaper staff members, advertisers, subscribers, and power structure members toward the Bowie News as a news and advertising medium. Three hypotheses were tested: that members of the power structure would have a more favorable attitude toward the Bowie News than other readers; that the Bowie News would play an active role as an instrument of the power structure; and that all four publics would differ in their perception of the newspaper's role in getting information to the community. The hypotheses were tested by a t test and rejected. Publics' attitudes were homogeneous. It was concluded that the Bowie News reflects consensus opinion within the community and is a trusted news source.
Date: May 1977
Creator: Whitfield, James Daniel
System: The UNT Digital Library
An Analysis of Strength Retention During an Eight-Week Walk/Jog Training Program (open access)

An Analysis of Strength Retention During an Eight-Week Walk/Jog Training Program

The purpose of this study was to determine the effects of an eight-week walk/jog program upon strength retention. Twenty-four male executives from Dallas, Texas represented the sample size Following eight weeks of resistive training, all subjects were pretested for strength and endurance measures. After the eight-week walk/jog program, all subjects were then retested adhering to the same pretest protocol. A two-way analysis of variance with repeated measures was used to test for mean group differences between pretest and posttest strength measures. A t-test for dependent means was utilized to ascertain differences in cardiovascular measurements. The alpha chosen to test the null hypotheses was the 0.05 level of significance. Results indicated that muscular strength was retained during the eight-week walk/jog program. No change in upper or lower extremity strength occurred, but significant improvements in maximal oxygen consumption and treadmill time were evidenced.
Date: May 1977
Creator: Grantham, William C., 1950-
System: The UNT Digital Library
The Applications of Regression Analysis in Auditing and Computer Systems (open access)

The Applications of Regression Analysis in Auditing and Computer Systems

This thesis describes regression analysis and shows how it can be used in account auditing and in computer system performance analysis. The study first introduces regression analysis techniques and statistics. Then, the use of regression analysis in auditing to detect "out of line" accounts and to determine audit sample size is discussed. These applications led to the concept of using regression analysis to predict job completion times in a computer system. The feasibility of this application of regression analysis was tested by constructing a predictive model to estimate job completion times using a computer system simulator. The predictive model's performance for the various job streams simulated shows that job completion time prediction is a feasible application for regression analysis.
Date: May 1977
Creator: Hubbard, Larry D.
System: The UNT Digital Library
Association of Masculinity Scores with Five Measures of Adjustment at the Gainesville State School for Delinquent Youths (open access)

Association of Masculinity Scores with Five Measures of Adjustment at the Gainesville State School for Delinquent Youths

The problem with which this investigation is concerned is that of determining the effects of masculinity on achievement. The California Psychological Inventory Fe Scale is used to measure masculinity. Results from this scale are compared with results on five measures of adjustment; Wechsler I.Q. scores, the Gainesville State School point system, and three scales constructed for this study to measure aspects of adjustment. The findings of this study fail to support the proposition that masculinity affects adjustment. The instrument used in this study to measure masculinity may be culturally biased. Further research is needed in this area using a number of measures of masculinity to determine masculinity's effects on adjustment.
Date: May 1977
Creator: Kurtz, Howard A.
System: The UNT Digital Library
Automated Testing of Interactive Systems (open access)

Automated Testing of Interactive Systems

Computer systems which interact with human users to collect, update or provide information are growing more complex. Additionally, users are demanding more thorough testing of all computer systems. Because of the complexity and thoroughness required, automation of interactive systems testing is desirable, especially for functional testing. Many currently available testing tools, like program proving, are impractical for testing large systems. The solution presented here is the development of an automated test system which simulates human users. This system incorporates a high-level programming language, ATLIS. ATLIS programs are compiled and interpretively executed. Programs are selected for execution by operator command, and failures are reported to the operator's console. An audit trail of all activity is provided. This solution provides improved efficiency and effectiveness over conventional testing methods.
Date: May 1977
Creator: Cartwright, Stephen C.
System: The UNT Digital Library
Cigarette Smoking Behavior: Self-Managed Change (open access)

Cigarette Smoking Behavior: Self-Managed Change

In the present study, three self-managed treatment programs were compared with respect to their ability to effect and maintain change in the cigarette smoking behavior of 27 subject volunteers from the population of employees of a Veterans Administration hospital. Subjects were randomly assigned to a self—imposed delay group, a self-directed relaxation group, and a self-monitoring group. The experimental program lasted 6 weeks with a 20-minute individual meeting each week. Three months following treatment, subjects were contacted by mail and were asked to monitor their smoking behavior for one week, and to return their average daily smoking rate by mail. The results provide support for the effectiveness of the self-management technique of self-imposed delay as a durability—enhancing treatment procedure. The effectiveness of self-management techniques as a general class of treatment strategies was not supported. A task for future research would be to establish the effectiveness of the delay technique implemented earlier in the cigarette smoking chain, as well as to determine whether effectiveness is increased or decreased by a specification of the content of a delay interval.
Date: May 1977
Creator: Taylor, Paul Wesley
System: The UNT Digital Library
The Common-Man Theme in the Plays of Miller and Wilder (open access)

The Common-Man Theme in the Plays of Miller and Wilder

This study emphasizes the private and public struggles of the common man as portrayed in two representative plays by Arthur Miller, Death of a Salesman and The Price, and two by Thornton Wilder, Our Town and The Skin of Our Teeth. These plays demonstrate man's struggle because of failures in responsibility toward self and family and because of his inability to fully appreciate life. Miller concentrates on the pathetic part of Man's nature, caused by a breakdown in human communication. Wilder, however, focuses on the resilient part which allows man to overcome natural disasters and moral transgressions. The timelessness of man's conflict explains the motivations of symbolic character types in these plays and reveals a marked applicability to all average citizens in American society.
Date: May 1977
Creator: Hastings, Robert M.
System: The UNT Digital Library
A Comparative Study of the Effects of Two In-Service Training Programs on Attitude Change in Rehabilitation Practitioners (open access)

A Comparative Study of the Effects of Two In-Service Training Programs on Attitude Change in Rehabilitation Practitioners

The problem of this study was to investigate the comparative effects of two in-service training programs on the attitudes of rehabilitation practitioners. There were two experimental groups, the consecutive three-day program and the two-week program, and one control group in the study. The two-week program was staggered, having training for five days, a three-week interval, and the remaining five days of training. The two programs were compared to determine which was more effective in altering rehabilitation practitioner attitudes. Conclusions were drawn from the experimental study and related literature review. They were that in-service training programs of two days and less will probably not produce significant attitude changes; in-service programs of three days to five days have a higher probability of producing significant attitude changes; in-service programs of two weeks to six weeks will probably produce less of a positive change than a program of less than two weeks but longer than two days; an in-service program of ten weeks to one year will probably produce less significant changes in attitudes than a shorter program; the shorter the in-service program (i.e., less than ten weeks and more than two days) the greater the probability of gaining significant attitude changes; the critical …
Date: May 1977
Creator: Welch, David U.
System: The UNT Digital Library
A Comparison of Environmental Climates in Elementary Schools (open access)

A Comparison of Environmental Climates in Elementary Schools

The problem of this study was to compare schools that utilize individualized instruction with schools that utilize a traditional or group-oriented approach to instruction. Comparisons were made relative to student perceptions of the schools' environmental climates, expectancy for school success, and promotion and non-promotion practices. The sources of data included a review of the literature related to traditional elementary education, the history and development of individualized instruction, humanistic aspects of individualized instruction, and the role of school personnel expectancy in individualized instruction. The Elementary School Environment Survey was used to collect the perceptions of 1,600 fifth-grade students about their school environments. A teacher self-report questionnaire, as well as a principal self-report questionnaire, provided data pertaining to expectancy for school success and non-promotion practices. Sixty-two fifth-grade teachers and twenty elementary principals responded to the questionnaire. The data gathered in this study indicated that fifth-grade students have similar perceptions of their school climate related to involvement, independence, morale, equity, and resources. Students in the traditional or group-oriented schools perceived their schools as being more humanistic. Elementary principals and teachers in individualized instruction schools and in traditional group-oriented schools do not differ in their expectations for school success. Schools utilizing individualized instruction non-promote …
Date: May 1977
Creator: Bean, Joe C.
System: The UNT Digital Library
A comparison of the academic achievements of seventh grade students in the semester unit plan with those in the quarter unit plan (open access)

A comparison of the academic achievements of seventh grade students in the semester unit plan with those in the quarter unit plan

The problem with which this dissertation is concerned is to determine whether the semester unit plan offers seventh grade students greater academic gain in the basic subject areas than does the quarter unit plan. Texas offers school districts a choice of the two plans. This study is unique in that the district of this study has both plans in operation at the secondary level.
Date: May 1977
Creator: Harrison, Guy T.
System: The UNT Digital Library
A comparison of the career interests, locus of control, attitude, and achievement scores of community college introduction to business "on-campus" students and "open-circuit instructional television" students (open access)

A comparison of the career interests, locus of control, attitude, and achievement scores of community college introduction to business "on-campus" students and "open-circuit instructional television" students

The problem of this study was a comparison of the career interests, locus of control, attitude, and achievement scores of community college introduction to business "on-campus" students and "open-circuit instructional television" students. The "on-campus" sample included 102 students enrolled in traditionally taught "introduction to business" classes and the "open-circuit instructional television" sample included 279 students enrolled in the "introduction to business" telecourse offered for credit in four community colleges in a multi-campus district.
Date: May 1977
Creator: Hegar, Kathryn Weige
System: The UNT Digital Library
Corporate Planning and Forecasting: An Analysis of the State of the Art in the Service Industry and Development of a Generalized Approach for the Needs of the 1970's and the 1980's (open access)

Corporate Planning and Forecasting: An Analysis of the State of the Art in the Service Industry and Development of a Generalized Approach for the Needs of the 1970's and the 1980's

This study has a twofold purpose. The first is to demonstrate the state of the art of corporate planning and forecasting activity, and the second is to determine the existence of any differences between the planning practices of the consumer service industry and the producer service industry. The study is organized into seven chapters. The introduction chapter contains background information, a description of the problem and opportunity followed by a definition of terms, the purpose of the research, hypothesis of the research. It also describes the scope of the research, methodology, significance and limitations of the study and provides a chapter bibliography. The study finds that though certain segments of the service industry have sophisticated planning capability, it is not generally widespread. The study concludes there is no significant difference in the planning methods between consumer services and producer services industries
Date: May 1977
Creator: Subramanian, Bala R.
System: The UNT Digital Library
A Critical Examination of "The Echo": Prison Publication of the Texas Department of Corrections (open access)

A Critical Examination of "The Echo": Prison Publication of the Texas Department of Corrections

The problem this investigation deals with is how The Echo functions as a communication vehicle within the TDC. Information was gathered through visits, interviews and a questionnaire. Organization is as follows: Chapter I, introduction, Chapter II, history and development; Chapter III, analysis of questionnaire data; Chapter IV, content; Chapter V, summary and conclusions. The study found that The Echo is often the sole source of TDC information to inmates, frequently aids administrators in providing inmates with information, provides an outlet for creativity, and enjoys little censorship. The report concludes that The Echo is an effective information medium, and that future study is possible in the role of the prison press in influencing rehabilitation, its contact with the outside public, and in inmate-produced magazines and journals.
Date: May 1977
Creator: Hadeler, David A.
System: The UNT Digital Library
The Cycle of Life Symphony (open access)

The Cycle of Life Symphony

This symphony is a representation of the composer's philosophy of life, which includes a belief in a pre-existent life (Beginnings), a mortal life (Searchings and Wanderings), and a life after death (Return Home). Three out of four of the cyclic elements in the Symphony are symbolic. Theme one represents the influence for good which emanates from a living God; motive one represents the influence for evil, or the Devil; motive two represents the influence of Christ. All three of these influences were present in the pre-existence, they are present in earth life and in the life after death, where good will ultimately triumph over evil. Motive three is found in both first and third movements, but has no symbolic meaning.
Date: May 1977
Creator: Dean, Lynn C.
System: The UNT Digital Library