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A Fully Coupled Monte Carlo/Discrete Ordinates Solution to the Neutron Transport Equation. Final Report
The neutron transport equation is solved by a hybrid method that iteratively couples regions where deterministic (S{sub N}) and stochastic (Monte Carlo) methods are applied. Unlike previous hybrid methods, the Monte Carlo and S{sub N} regions are fully coupled in the sense that no assumption is made about geometrical separation or decoupling. The hybrid method provides a new means of solving problems involving both optically thick and optically thin regions that neither Monte Carlo nor S{sub N} is well suited for by themselves. The fully coupled Monte Carlo/S{sub N} technique consists of defining spatial and/or energy regions of a problem in which either a Monte Carlo calculation or an S{sub N} calculation is to be performed. The Monte Carlo region may comprise the entire spatial region for selected energy groups, or may consist of a rectangular area that is either completely or partially embedded in an arbitrary S{sub N} region. The Monte Carlo and S{sub N} regions are then connected through the common angular boundary fluxes, which are determined iteratively using the response matrix technique, and volumetric sources. The hybrid method has been implemented in the S{sub N} code TWODANT by adding special-purpose Monte Carlo subroutines to calculate the response …
Date:
December 31, 1990
Creator:
Filippone, W. L. & Baker, R. S.
System:
The UNT Digital Library
Transverse liquid fuel jet breakup, burning, and ignition
An analytical/numerical study of the breakup, burning, and ignition of liquid fuels injected transversely into a hot air stream is conducted. The non-reacting liquid jet breakup location is determined by the local sonic point criterion first proposed by Schetz, et al. (1980). Two models, one employing analysis of an elliptical jet cross-section and the other employing a two-dimensional blunt body to represent the transverse jet, have been used for sonic point calculations. An auxiliary criterion based on surface tension stability is used as a separate means of determining the breakup location. For the reacting liquid jet problem, a diffusion flame supported by a one-step chemical reaction within the gaseous boundary layer is solved along the ellipse surface in subsonic crossflow. Typical flame structures and concentration profiles have been calculated for various locations along the jet cross-section as a function of upstream Mach numbers. The integrated reaction rate along the jet cross-section is used to predict ignition position, which is found to be situated near the stagnation point. While a multi-step reaction is needed to represent the ignition process more accurately, the present calculation does yield reasonable predictions concerning ignition along a curved surface.
Date:
December 31, 1990
Creator:
Li, H.
System:
The UNT Digital Library
AIDS: a survey of selected college and university students
In this study, a survey instrument measuring knowledge and attitudes about AIDS, information sources about AIDS, and personal behavior was administered to college students. Students completed the survey during a single class period.
Date:
December 1990
Creator:
Trammell, Rebecca
System:
The UNT Digital Library
Analysis of Reporting Compliance of Labor Relations Consultants Under Section 203 (b) of the Labor-Management Reporting and Disclosure Act, 1959
This study examines the reporting compliance, as defined by section 203(b) of the Labor -Management Reporting and Disclosure Act (LMRDA), 1959, of labor relations consultants who engage in persuader activity. Organized labor suggests that the loss in union strength results, in large part, from management's use of labor relations consultants and their failure to file required reports with the U.S. Department of Labor. Two samples of labor relations consultants known to have engaged in persuader activity and two samples of those who could be engaged in persuader activity are identified. A research questionnaire is mailed to 779 of the total of 887 labor relations consultants for whom an address could be developed. Discriminant analysis using 16 variables correctly classifies 93.8 percent of the responding labor relations consultants grouped according to whether they had filed required reports. Other discriminant analyses using selected variables are also conducted. Three associated questions are answered. First, there are an estimated 850 labor relations consultants who have engaged in persuader activity or who can be presumed to have engaged in persuader activity. Of this number, almost 500 are estimated to have engaged in persuader activity and only 30 percent of these are estimated to have filed …
Date:
December 1990
Creator:
Asdorian, Martin
System:
The UNT Digital Library
An analysis of the role of women in Texas Baptist higher education administration
This study addressed the role of women in higher education administration in the eight Baptist universities in Texas. The purposes of this study were to examine the standards and practices of general administration as viewed by administrators within Baptist higher education and to analyze the influences upon the role of women in administration in the eight Texas Baptist universities.
Date:
December 1990
Creator:
Ward, Linda Gail
System:
The UNT Digital Library
Anomalous Behavior in the Rotational Spectra of the v₈=2 and the v₈=3 Vibrations for the ¹³C and ¹⁵N Tagged Isotopes of the CH₃CN Molecule in the Frequency Range 17-95 GHz
The rotational microwave spectra of the three isotopes (^13CH_3^12C^15N, ^12CH_3^13C^15N, and ^13CH_3^13C^15N) of the methyl cyanide molecule in the v_8=3, v_8=2, v_7=1 and v_4=1 vibrational energy levels for the rotational components 1£J£5 (for a range of frequency 17-95 GHz.) were experimentally and theoretically examined. Rotational components in each vibration were measured to determine the mutual interactions in each vibration between any of the vibrational levels investigated. The method of isotopic substitution was employed for internal tuning of each vibrational level by single and double substitution of ^13C in the two sites of the molecule. It was found that relative frequencies within each vibration with respect to another vibration were shifted in a systematic way. The results given in this work were interpreted on the basis of these energy shifts. Large departure between experimentally measured and theoretically predicted frequency for the quantum sets (J, K=±l, ϑ=±1), Kϑ-l in the v_8=3 vibrational states for the ^13c and ^15N tagged isotopes of CH_3CN showed anomalous behavior which was explained as being due to Fermi resonance. Accidently strong resonances (ASR) were introduced to account for some departures which were not explained by Fermi resonance.
Date:
December 1990
Creator:
Al-Share, Mohammad A. (Mohammad Abdel)
System:
The UNT Digital Library
The Association Between Postmodernistic Trends and Historical Scholarship With Implications for the College-Level Teaching of History
The debates among historians regarding the "crisis in history" have been directed to various problems. The fragmentation of historical scholarship and writing embodied in the "new history," the alleged overspecialization of historical scholarship, and recent challenges to the objectivity of historical fact and interpretation receive attention. Successive chapters attend to a general background study and description of postmodernism, the association between postmodernistic trends and historical scholarship as seen in poststructuralism and deconstruction, and the implications of postmodernistic criticism for post-secondary history instruction. Deconstruction, or the hermeneutical challenge of poetics, is a criticism of historical epistemological presuppositions and practices. Deconstruction yields insights that are useful to judge historical knowing. However, deconstruction does not present a compelling alternative to accepted standards of historical scholarship and practice
Date:
December 1990
Creator:
Summers, Jerry L. (Jerry Lynn)
System:
The UNT Digital Library
The association between reading ability and test performance among adults of limited reading ability
This study examined adult students of limited reading ability, determining the extent to which their performance on a standardized examination was a function of their reading ability, rather than function of their knowledge of the material tested by the examination.
Date:
December 1990
Creator:
Fuller, Frank D. (Frank Davidson)
System:
The UNT Digital Library
Attitudes of Faculty Members Toward the Integration of Faith and Discipline at Selected Southern Baptist Colleges and Universities
The attitudes toward the integration of faith and discipline of full-time faculty members at five selected Southern Baptist colleges and universities which are members of the Christian College Coalition were explored for this study. The integration of faith and discipline is a concept unique to Southern Baptist higher education. Arthur Walker, Jr., of the Education Commission of the Southern Baptist Convention defines the concept as referring to the mission of the institution, the personal faith of faculty members, and the professional involvement and interaction of faculty members with their students, regardless of disciplines. Since little information exists on faculty attitudes toward this concept, data were collected through a survey instrument on three dimensions of integration: professorial integration in the classroom, professorial integration in and out of the classroom, and institutional integration of faith and discipline.
Date:
December 1990
Creator:
Cooper, Monte Vaughan
System:
The UNT Digital Library
Cardiovascular and Hormonal Responses to Orthostasis Following Four Hours of Head-Down Rest in Endurance-Exercise-Trained and Untrained Subjects
Cardiovascular and hormonal responses to +700 head-up tilt (HUT: orthostatic challenge) were compared between six endurance exercise trained (ET) and six untrained (UT) subjects prior to and immediately following 4 hours of -60 head-down rest (HDR). The ET subjects showed a significant (P < 0.05) decrease in orthostatic tolerance time (pre syncopal symptoms) during post-HDR HUT, while no difference was observed between ET and UT groups in pre-HDR HUT. The volume regulatory hormonal responses were similar between ET and UT groups whether during HUT or HDR. The pre-syncopal subjects had a greater increase in plasma arginine vasopressin and less increase in plasma renin activity and plasma aldosterone during HUT than was observed in non syncopal subjects. These data suggest that HDR deconditioning was more effective in the ET subjects.
Date:
December 1990
Creator:
Chen, Jia-Jen
System:
The UNT Digital Library
A Case Study of an Information System Developed to Generate Competitive Advantage
The purpose of this study was to examine the effect of information technology (IT) on the competitive position of a firm. The problem motivating this study is the potential for misallocation of scarce resources on new technology without realizing the level of competitive advantage (CA) expected. This study was a single-site case study. It examined the factors related to the selection, design, development, implementation, use, and effects of an information system (IS) intended to generate CA. The study examined all these factors within the organizational and industrial contexts of the subject firm.
Date:
December 1990
Creator:
Platt, Richard G. (Richard Gordon)
System:
The UNT Digital Library
A Challenge to Charles Lamb's "On the Tragedies of Shakespeare"
This study challenges Charles Lamb's 1811 essay "On the Tragedies of Shakespeare, Considered with Reference to their Fitness for Stage Representation," which argues that Shakespeare's plays are better suited for reading than stage production. Each of the four chapters considers a specific argument Lamb raises against the theatre and the particular Shakespearean tragedy used to illustrate his point. The Hamlet chapter examines the supposed concessions involved in the actor/audience relationship. The Macbeth chapter challenges Lamb's Platonic view of Shakespearean characterization. The Othello chapter considers whether some characters and images, while acceptable to the reader's imagination, are improper on stage. Finally, the King Lear chapter considers the portrayal of the mind in the theatre, employing semiotic principles to examine the actor's expressive resources.
Date:
December 1990
Creator:
Walworth, Alan M. (Alan Marshall)
System:
The UNT Digital Library
Characterization of Aquatic Fulvic Acids by Chromatographic Methods
Several chromatographic and spectroscopic techniques were applied to Suwanne River reference fulvic acids (FA) and their permethylated derivatives. Retention mechanisms, structural characteristics, and thermal stabilities of FA and its derivatives and fractions were evaluated.
Date:
December 1990
Creator:
Ong, Wen-ching
System:
The UNT Digital Library
Characterizations of optical nonlinearities in carbon black suspension in liquids
A complete study was conducted on optical limiting characterization in samples of carbon black microparticles in a mixture of deionized water and ethylene glyccol using nanosecodn and picosecond later pulses at 532 nm and 1064 nm.
Date:
December 1990
Creator:
Mansour, Kamjou
System:
The UNT Digital Library
A Comparative Study of Junior High School General Music Programs Between Korea and the United States
iv, 126 leaves.
Date:
December 1990
Creator:
Kim, Do Soo
System:
The UNT Digital Library
A comparative study of metacognitive strategies in eighth grade reading improvement students
The purposes of this study are to determine the level of growth by reading improvement students when metacognitive skills are taught and to determine which instructional approach is the most effective in maximizing reading comprehension.
Date:
December 1990
Creator:
Jeffers, Bernadette T.
System:
The UNT Digital Library
A Comparison of Adult Children of Alcoholic Families with Adult Children From Non-Alcoholic Families on Depression, Self-Esteem, and Anxiety
The problem of this study was to test the differences between adult children from alcoholic families with adult children from non-alcoholic families on levels of depression, self-esteem, and anxiety. The sample consisted of 203 volunteers, all from the Counselor Education Department, 150 females and 53 males, ages 19 and older. Volunteers who were noted as being adult children of alcoholic families numbered 60. Measures used were the Children of Alcoholics Screening Test (CAST), the Beck Depression Inventory (BDI), the State-Trait Anxiety Inventory (STAI), and the Coopersmith Adult Self-Esteem Inventory (SEI). Multivariate Analysis of Variance was used to test for differences between groups. In addition, a secondary analysis using a one-way MANOVA was used to test for differences between dysfunctional and functional family of origin status on the dependent variables of depression, self-esteem, and anxiety.
Date:
December 1990
Creator:
Dodd, David T. (David Tennyson), 1957-
System:
The UNT Digital Library
A Comparison of the Perceptions of Future Adult Functioning of Adolescents with Spina Bifida, Their Parents, and Adolescents without an Identified Disability
A study was conducted to investigate factors associated with the perceived future self-efficacy in adolescents with spina bifida. Thirteen adolescents with spina bifida and their parents were surveyed. Seventeen adolescents without an identified disability and their parents were also surveyed. The Questionnaire of Future Adult Activities (QFAA) and the Health Attribution Test (HAT) were administered. Parent responses were compared to those of adolescents and adolescent responses were compared between groups. There was no overall correlation between parent and adolescent responses. Differences were found between responses of adolescents with spina bifida and adolescents without an identified disability. Limited correlations were found between the QFAA and the HAT.
Date:
December 1990
Creator:
Cain, Hal M. (Hal Martin)
System:
The UNT Digital Library
A Comparison of the Reading and Writing Performance of Children in a Whole Language Pre-First-Grade Class and a Modified Traditional First-Grade Class
This study examined differences in literacy development between five students attending whole language pre-first-grade classes and five students eligible for pre-first-grade classes but attending modified traditional first-grade classes. Differences between whole language pre-first-grade classes and modified traditional first-grade classes in use of literacy materials, teaching procedures, and amount of time spent on literacy were also examined. The procedures involved testing the subjects on reading and writing skills, observations of the pre-first-grade and first-grade classes, and analysis of subjects' writing samples.
Date:
December 1990
Creator:
Davis, Ruth A. (Ruth Ann), 1946-
System:
The UNT Digital Library
A Comparison of Universal Soil Loss Equation Results Using a Remote Sensing/GIS Technique to Results Obtained Using a Field Survey Technique
Digital satellite remote sensing and Geographic Information Systems (GIS) have been used in conjunction with the Universal Soil Loss Equation (USLE) to model soil erosion potential within watersheds. This study compared erosion estimates calculated by the remote sensing method to results obtained in the field by soil conservationists using conventional methods.
Date:
December 1990
Creator:
Hunter, Bruce Allan
System:
The UNT Digital Library
Concept Vs. Intuition: A Study Into the Personal Understanding of Images
I was curious as to what my work was about and what images were important to me. There had to be a reason why I was driven to do what I did, whether it was a conscious, conceptual purpose or a subconscious, intuitive reason. The problem of this investigation was to discover which of these I used in the creation of my images or whether I used both.
Date:
December 1990
Creator:
Student, Cheryl L.
System:
The UNT Digital Library
Cytogenetics of Chromosome 22 and its Clinical Relevance
This investigation reorganizes and identifies chromosomal anomalies and delineates the associated clinical findings. The present investigation involved 37 individuals with anomalies of chromosome 22. The clinical profile with the corresponding cytogenetic anomalies was studied.
Date:
December 1990
Creator:
Kulharya, Anita S. (Anita Singh)
System:
The UNT Digital Library
Depressive Subtypes and Dysfunctional Attitudes: a Personal Construct View
The influence of cognitive organization, dysfunctional attitudes, and depressive "subtype" on the perceptions of negative life events is explored. BDI scores are used to delineate symptomatic and non-symptomatic groups. Construct content (sociotropic versus autonomous, as first defined by Beck) is used to identify predominant schema-type. Subjects completed a Problematic Situations Questionnaire with Dysfunctional Attitudes Scale. Results indicate that depressed individuals display more dysfunctional attitudes and negative affect in all types of negative situations; further the endorsement of dysfunctional attitudes is significantly more likely to occur in the context of schema-congruent situations. Findings are discussed a) in terms of the utility of personal constructs in the assessment of schema-type and b) in accordance with a person-event interactional model of depression.
Date:
December 1990
Creator:
Longhorn, Alison J. (Alison Jane)
System:
The UNT Digital Library
Development and termination of Bishop College between 1960 and 1988
The purposes of this study were (a) to determine the significant events leading to the relocation of Bishop College, (b) to describe the programs offered at the college, (c) to identify a president and describe his impact on policy and programs in the college, (d) to describe the student population that attended the college during the period studied, and (e) to identify the causes and subsequent events which led to the closing of the college.
Date:
December 1990
Creator:
Egar, Emmanuel Edame
System:
The UNT Digital Library