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African-American Senior Administrators of Colleges and Universities in American Higher Education: Identification of Characteristics in Their Career Progression
This study identified and compared characteristics in the career progression of African-American college presidents of institutions in the continental United States. The study was concerned with personal, educational and professional characteristics of these senior level administrators. From a population of 141 individuals, 73 presidents participated in this study. Frequencies, means, percentages, chi-square, crosstabulations and analysis of variance (ANOVA) were employed in the analysis of data. The level of significance was set at 0.05.
Date:
May 1992
Creator:
Marbury, R. Kevin (Robert Kevin)
System:
The UNT Digital Library
Enzyme Assays Using Earthworms for Assessing Innate and Nonspecific Immunotoxicity of Xenobiotics
Principal objectives of my research were to: (1) report for the first time that coelomocytes are able to reduce NBT dye and confirm the presence of lysozyme-like activity in earthworm; (2) develop a standard methodology for determination of NBT reduction and lysozyme-like activity in earthworms; (3) compare NBT reduction and lysozyme-like activity in earthworms with those of murine and human cells and fluids; and (4) demonstrate the sensitivity of earthworm NBT reduction and lysozyme-like activity as the assays using matrics in refuse-derived fuel fly ash (RDFF) and CuSO4.
Date:
May 1992
Creator:
Chen, Shing-Chong
System:
The UNT Digital Library
The Incest Taboo in Wuthering Heights : A Modern Appraisal
A modern interpretation of Wuthering Heights suggests that an unconscious incest taboo impeded Catherine and her foster brother, Heathcliff, from achieving normal sexual union and led them to seek union after death. Insights from anthropology, psychology, and sociology provide a key to many of the subtleties of the novel by broadening our perspectives on the causes of incest, its manifestations, and its consequences. Anthropology links the incest taboo to primitive systems of totemism and rules of exogamy, under which the two lovers' marriage would have been disallowed because they are members of the same clan. Psychological studies provide insight into Heathcliff and Catherine's abnormal relationship—emotionally passionate but sexually dispassionate—and their even more bizarre behavior—sadistic, necrophilic, and vampiristic—all of which can be linked to incest. The psychological manifestations merge with the moral consequences in Bronte's inverted image of paradise; as in Milton's Paradise, incest is both a metaphor for evil and a symbol of pre-Lapsarian innocence. The psychological and moral consequences of incest in the first generation carry over into the second generation, resulting in a complex doubling of characters, names, situations, narration, and time sequences that is characteristic of the self-enclosed, circular nature of incest. An examination of Emily Bronte's …
Date:
August 1992
Creator:
McGuire, Kathryn B. (Kathryn Bezard)
System:
The UNT Digital Library
Integration of Students with Disabilities into a Contemporary Technology Education Program: a Case Study
The impacts resulting from the integration of students with moderate-to-severe disabilities into a contemporary technology education program are described in this study. The research centered around questions that addressed impacts on students with disabilities, on regular students, on teachers, and on parents of students with disabilities. The study took place in a ninth-grade technology education class and involved two students with moderate-to-severe disabilities. One subject was a 15-year-old male student who was autistic, had a speech handicap, and was mildly retarded. The other student was a 17-year-old male who was emotionally disturbed and learning disabled. Data were collected through classroom observations, videotaped sessions, and interviews with teachers and parents. Notes taken during observations and from videotaped sessions were transcribed, coded, and analyzed. Interviews were also transcribed. The transcripts were reviewed, and significant data were transferred to interview synopsis sheets for incorporation with the other findings. No major problems were found with the integration of the students with disabilities into the technology education program. The students with disabilities caused no discipline problems and were readily accepted by the regular students. However, because the students with disabilities were not actively involved in many of the activities of the class, much of their …
Date:
December 1992
Creator:
Pullias, David T. (David Terrell)
System:
The UNT Digital Library
The Scope and Methods of Citizen Participation in Planning and Designing Public library Facilities
A questionnaire survey was conducted to ascertain the scope and methods used to involve citizens in public library facility planning and design. Because of the paucity of written material on this subject in the literatures of both library science and architecture, this descriptive study was undertaken.
Date:
August 1992
Creator:
Washington-Blair, Angela
System:
The UNT Digital Library
A Study of Anxiety Reducing Teaching Methods and Computer Anxiety among Community College Students
The purpose of this study was to evaluate the relationship between anxiety reducing teaching methods and computer anxiety levels and learning gain of students in a college level introductory computer course. Areas examined were the computer anxiety levels of students categorized by selected demographic variables, the learning gain of students categorized by selected demographic variables, and anxiety levels and learning gain of students after completion of the course. Data for the investigation were collected via the Standardized Test of Computer Literacy (STCL) and the Computer Opinion Survey (CAIN), developed by Michael Simonson et al. at Iowa State University. The nonequivalent pretest/posttest control group design was used. The statistical procedure was the t test for independent groups, with the level of significance set at the .05 level. The data analysis was accomplished using the StatPac Gold statistical analysis package for the microcomputer. Based upon the analysis of the data, both hypotheses of the study were rejected. Research hypothesis number one was that students in a class using computer anxiety reducing teaching methods would show a greater reduction in computer anxiety levels than students in a traditional class. Hypothesis number two was that students in a class using computer anxiety reducing methods …
Date:
August 1992
Creator:
Taylor, Bernard Wayne
System:
The UNT Digital Library
Expulsion of Carriers from the Double-Barrier Quantum Well and Investigation of Its Spectral and Transport Consequences
In this work I investigate the expulsion of carriers from nanostructures using the double-barrier quantum well (DBQW) as an example and discuss manifestations of this effect in the spectrum of the DBQW in absence of bias, and in the tunneling current in presence of bias. Assuming equality of the Fermi energy in all regions of the considered system, I compute the relative density of carriers localized in the DBQW and conclude that a fraction of carriers is expelled from this nanostructure.
Date:
March 1992
Creator:
Chyla, Wojciech Tadeusz
System:
The UNT Digital Library
A Study of Korean Kindergarten Teachers' Concerns
The problem of this study was to identify some concerns of Korean kindergarten teachers at different points in their careers, based on the conceptual framework of Katz's (1972, 1977, 1985) theory of preschool teacher development. This study also described the variations in these concerns on the basis of some teacher characteristics including teaching experience, certification, educational background, inservice training, and teaching assignment. The subjects for this study were 174 volunteers who were Korean kindergarten teachers in Seoul, Korea. The concerns of the teachers were expressed through the Kindergarten Teacher Concerns Questionnaire, consisting of two parts: (a) background information, and (b) the Kindergarten Teacher Concern Rating Scale (KTCRS), consisting of a list of 54 items developed by Tsai (1990), reflecting the four areas of concerns—Survival, Consolidation, Renewal, and Maturity—formulated by Katz. A Likert type 5-point scale indicating the degree of concerns was used in the questionnaire as the scoring system. The following conclusions were drawn from this study: 1. The concerns of the Korean kindergarten teachers were developmental in nature in terms of preoccupation with a specific area of concerns at different points in the teachers' careers. This result tended to follow a sequence of stages as posited by Katz (1972, …
Date:
December 1992
Creator:
Park, Guen K.
System:
The UNT Digital Library
The Association between Attitudes toward Computers and Understanding of Ethical Issues Affecting Their Use
This study examines the association between the attitudes of students toward computers and their knowledge of the ethical uses of computers. The focus for this research was undergraduate students in the Colleges of Arts and Sciences (Department of Computer Science), Business and Education at the University of North Texas in Denton, Texas.
Date:
May 1992
Creator:
Gottleber, Timothy Theodore
System:
The UNT Digital Library
L-Shell X-Ray Production Cross Sections for ₂₀Ca, ₂₆Fe, ₂₈Ni, ₂₉Cu, ₃₀Zn, ₃₁Ga, and ₃₂Ge by Hydrogen, Helium, and Lithium Ions
L-shell x-ray production cross sections are presented for Fe, Ni, Cu, Zn, Ga, and Ge by 0.5- to 5.0-MeV protons and by 0.5- to 8.0-MeV helium ions and Ca, Fe, Ni, Cu, and Ge by 0.75- to 4.5-MeV lithium ions. These measurements are compared to the first Born theory and the perturbed-stationary- state theory with energy-loss, Coulomb deflection, and relativistic corrections (ECPSSR). The results are also compared to previous experimental investigations. The high precision x-ray measurements were performed with a windowless Si(Li) detector. The efficiency of the detector was determined by the use of thin target atomic-field bremsstrahlung produced by 66.5 keV electrons. The measured bremsstrahlung spectra were compared to theoretical bremsstrahlung distributions in order to obtain an efficiency versus energy curve. The targets for the measurement were manufactured by the vacuum evaporation of the target element onto thin foils of carbon. Impurities in the carbon caused interferences inthe L-shell x-ray peaks. Special cleansing procedures were developed that reduced the impurity concentrations in the carbon foil, making the use of less than 5 μg/cm^2 targets possible. The first Born theory is seen to greatly overpredict the data at low ion energies. The ECPSSR theory matches the data very well at …
Date:
May 1992
Creator:
McNeir, Michael Ridge
System:
The UNT Digital Library
Naloxone Potentiation of Epinephrine Induced Vasoconstriction in Canine Skeletal Muscle Arteries
Naloxone (NX) potentiated epinephrine (EPI) induced submaximal vasoconstriction in canine renal and skeletal muscle arterial segments, yet had no vasoconstrictor action alone. Developed tension generated in-vitro by 4 x 1mm. O.D. rings from 1st degree branches of canine femoral arteries was expressed as % of KCI induced maximum response. NX (10^-5 M) potentiated EPI induced submaximal contractions (34.2%) significantly more than contractions induced by norepinephrine, phenylephrine, lofexidine, ADH, KCI and serotonin (13.8,13.4,4.7,13.5,14.4 and 11.4% respectively). The NX response was unaffected by beta-adrenergic blockade and NX did not reverse an isoproterenol mediated vasodilation. Alphaadrenergic blockade with phentolamine completely eliminated EPI plus NX induced vasoconstriction. After washout, vessels exposed to EPI plus NX relaxed by 50% significantly faster than vessels exposed to EPI alone (18.5 and 27.9 min respectively). EPI induced vasoconstrictions were potentiated by 10^-5 M corticosterone (49.0%) which inhibits extraneuronal catecholamine uptake, but not by 10^-7 M desipramine (1.1%) which inhibits neuronal uptake. EPI induced vasoconstrictions were also potentiated by 10^-4 M pyrogallol (33.0%) which inhibits catechol-o-methyl transferase activity, but not by 10^-5 M pargyline (-1.1%) which inhibits monoamine oxidase activity. The NX effect was endothelium independent. The dose-response of various opioid receptor agonists and antagonists were compared to the …
Date:
August 1992
Creator:
Stoll, Scott Thomas
System:
The UNT Digital Library
The Effects of Using Integrated Testing and Skills Software in Reading Instruction for At-risk Students
The purpose of this study was to determine the effects of using computer-managed, integrated testing and skills software with individualized homework packets on the reading achievement and attitudes of at-risk students in a low achieving urban school. An additional purpose was to determine teacher attitudes toward using technology to deliver, measure, and manage instruction.
Date:
December 1992
Creator:
Pitre, Barbara J. (Barbara Jean)
System:
The UNT Digital Library
Locational Determinants of Real Estate Valuation: an Analysis of Spatial Autocorrelation in the Hedonic Pricing of Real Estate
Recent studies of the valuation of real estate have concentrated on the use of hedonic pricing techniques in which the implicit prices of the component characteristics of an asset are inferred from the observed sale price using regression analysis. All of these studies include as explanatory variables one or more locational factors, such as distance to the central business district, as proxies for the effect that location has on the utility of land. In this research, the explicit consideration of the location of real estate in terms of the geographic or Cartesian coordinates (spatial attributes) of observed sales is shown to be a potential substitute for such proxies, either wholly or in part. Such use of spatial attributes could improve the usefulness of the hedonic methodology while at the same time significantly reducing cost and eliminating sources of error.
Date:
May 1992
Creator:
Shampton, John F.
System:
The UNT Digital Library
The Relationship between Educators' Global Perspective and Their Receptivity to the Inclusion of Elements of Global Education in the Curriculum
The purpose of this study was to determine if a significant relationship exists between teachers' and administrators' global perspective and their receptivity to the inclusion of elements of global education in the curriculum.
Date:
August 1992
Creator:
Meeks, Gregory B. (Gregory Brent)
System:
The UNT Digital Library
Construct Use and Self-Aspect Change in Recovery From Coronary Artery Bypass Graft Surgery: a Personal Construct Analysis
Cognitive ratings that use bipolar constructs based upon similarity and contrast have been shown to be biased towards the similarity pole in approximately a 62/38 ratio. This bias has also been known to shift in the contrastive direction for individuals who have psychiatric problems. This quantitative measure of cognitive change has a potential for characterizing cognitive changes that occur during the disease process, including recovery from disease. The present study investigated changes in self-aspect ratings and bipolar construct use in adult male veterans who had undergone coronary artery bypass graft surgery. Results indicated that treatment subjects' self-aspect and construct ratings were more negative than controls'. Results also indicated that all subjects rated core interpersonal self-aspects closest to the expected bias, while self-aspects related to cardiac recovery problems were rated in the most contrastive direction. The results finally suggested that the greatest degree of change for the treatment subjects were in emotionally generated constructs. The results suggested a preliminary validation for characterizing cognitive changes in the disease process by measuring shifts in bipolar construct ratings.
Date:
May 1992
Creator:
Zolten, Avram J. (Avram Jeffery)
System:
The UNT Digital Library
Nonlinear Optical Absorption and Refraction Study of Metallophthalocyanine Dyes
This dissertation deals with the characterization of the nonlinear absorption and refraction of two representative metallophthalocyanine dyes: chloro aluminum phthalocyanine dissolved in methanol, referred to as CAP, and a silicon naphthalocyanine derivative dissolved in toluene, referred to as SiNc. Using the Z-scan technique, the experiments are performed on both the picosecond and nanosecond timescales at a wavelength of 0.532 μm.
Date:
December 1992
Creator:
Wei, Tai-Huei
System:
The UNT Digital Library
A Quasi-Experimental Study of 5th-Graders' Use of Selected Self-Directing Perceptions and Learning Strategies
A major change being advocated in education is that of making students more self-directing; that is, helping them become more responsible for their own learning. The focus of this investigation was on fifth grade students' use of self-directed learning strategies and self-directed perceptual skills. An experimental study was conducted using the nested design for analyzing data obtained from the Guglielmino Self-Directed Learning Readiness Scale, the Zimmerman and Martinez-Pons1 Self-Regulated Learning Interview Schedule, and the Bradley-Lane Self-Directing Perceptual Scale. One hundred fifty-two fifth graders were involved in the eight week study along with their six teachers. Both students and teachers were immersed in a module of training that included emphasis upon self-directing behaviors and learning strategies. Two striking findings emerged; namely, (a) in comparing the average number of learning strategies acquired after treatment, the experimental group (low, middle, and high IQ levels) scored 40%, 50% and 29% higher respectively, than did the control group; (b) in comparing the fifth grade students use of learning strategies it was found that most students nearly doubled the number of learning strategies they had previously acquired. Thus, it was concluded that children who do not have actual teaching of information or data concerning learning strategies …
Date:
December 1992
Creator:
Lane, Pam S.
System:
The UNT Digital Library
Cardiorespiratory Responses to Graded Levels of Lower-body Positive Pressure During Dynamic Exercise in Man
Cardiorespiratory responses to incremental dynamic exercise were assessed across four different levels of lower-body positive pressure (LBPP) and, as a separate study, during constant load (i.e constant work rate) exercise below and above each subject's ventilatory threshold (VT), both with and without 45 torr of LBPP.
Date:
December 1992
Creator:
Williamson, Jon W. (Jon Whitney)
System:
The UNT Digital Library
Perceptions of Exemplary Teaching Attributes of Adjunct Faculty in the Dallas County Community College District: a Case Study
The problem of this study involved identifying and ranking perceptions of the attributes of exemplary teaching of adjunct faculty of the Dallas County Community College District. Data was collected by a 75 item opinionnaire and a demographic data sheet which was sent to a population of 3,000 employees of the Dallas County Community College District and 100 exemplary faculty from 39 of the 50 United States. The five chapters were titled Introduction, Review of Literature, Methods, Presentation and Analysis of Findings, and Summary, Discussion, Conclusions, and Recommendations. Revealed through the findings of Chapter 4 was the order of attributes as a Grand grand rank found through the combining of the grand rank order of the Dallas County Community Colleges' employees and the rank order of the nationally recognized exemplary faculty. Findings disclosed that a rank ordering of items represented by Kendall's W at .9654 with a chi-square of 142.8815 at the .001 level of significance. These findings led to the rejection of three null hypotheses and the following related conclusions: (1) perceptions of importance of teaching attributes, can be rank ordered, (2) while a high level of significant values of W may be interpreted as meaning that the observers and …
Date:
August 1992
Creator:
Picquet, James Philip
System:
The UNT Digital Library
Construction of a Cloning Vector Based upon a Rhizobium Plasmid Origin of Replication and its Application to Genetic Engineering of Rhizobium Strains
Rhizobia are Gram-negative, rod-shaped, soil bacteria with the ability to fix atmospheric nitrogen into ammonia as symbiont bacteroids within nodules of leguminous plant roots. Here, resident Rhizobium plasmids were studied as possible sources of components for the construction of a cloning vector for Rhizobium species.
Date:
May 1992
Creator:
Jeong, Pyengsoo
System:
The UNT Digital Library
The Developmental Characteristics of Young Children Prenatally Substance-exposed
The purpose of this study was to explore the developmental characteristics of young children (ages 11-60 months) with prenatal substance-exposure. A developmental rating scale, the Developmental Checklist (DC) of the Developmental Observation Checklists (DOCs) was utilized. The DC measures the domains of language, motor, social/behavioral, and cognition, as well as overall developmental status.
Date:
December 1992
Creator:
Taylor, Diane L. (Diane Louise)
System:
The UNT Digital Library
Structure and Form in Two Late Works for Flute and Orchestra by Ernest Bloch (1880-1959): Suite Modale (1956) and Two Last Poems (Maybe. . .) (1958) -- a Lecture Recital, Together With Three Recitals of Selected Works of J.S. Bach, Jolivet, Mozart,and Others
The lecture was presented on November 18, 1991. This presentation focused on the only two compositions for solo flute and orchestra by Ernest Bloch. Written during the last three years of the composer's life, the pieces are representative of his last style period. While Suite Modale is neobaroque in style, Two Last Poems is much more subjective. Together they represent a synthesis of many of the stylistic characteristics of Ernest Bloch. The musical parameters discussed included form, melody, texture, rhythm, harmony, and expressive devices.
Date:
May 1992
Creator:
Stirzaker, Kim E. (Kim Elizabeth)
System:
The UNT Digital Library
Factors Involved in the Selection of Medical Technology as a Major Field
The problem of this study concerned the factors involved in the selection of medical technology as a major. The purposes of the study were to determine (a) the most influential factors in the selection of medical technology as a career, (b) which sources of career information were the most frequently utilized and most influential in the choice of medical technology as a major, (c) the most common misperceptions of the field at the time of selection of the major, and (d) the relationship between accurate perceptions of the field at the time of major selection and satisfaction with the choice of major after employment.
Date:
December 1992
Creator:
Jones, Gail A. (Gail Ann)
System:
The UNT Digital Library
Senate Bill 351's Effect on School Finance Equity in Texas
The purpose of this study was to determine the impact of Senate Bill 351 on public school finance equity in Texas and to provide information to those concerned with the financing of schools in this state. Data provided by the Texas Education Agency were used to determine differences in expenditures per student and local tax rates before and after the implementation of Senate Bill 351.
Date:
December 1992
Creator:
Henry, John Mark
System:
The UNT Digital Library