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Anxiety in the Career Exploration Process
This paper discusses the causes behind anxiety in the career exploration process and explains the findings of a study conducted with 200 undergraduate college students at the University of North Texas. Nancy E. Polk explores related literature and topics such as psychological separation/attachment and self-efficacy that are involved in the creation of anxiety.
Date:
1990
Creator:
Polk, Nancy E.
System:
The UNT Digital Library
Theoretical studies of non-Newtonian and Newtonian fluid flow through porous media
A comprehensive theoretical study has been carried out on the flow behavior of both single and multiple phase non-Newtonian fluids in porous media. This work is divided into three parts: development of numerical and analytical solutions; theoretical studies of transient flow of non-Newtonian fluids in porous media; and applications of well test analysis and displacement efficiency evaluation to field problems. A fully implicit, integral finite difference model has been developed for simulation of non-Newtonian and Newtonian fluid flow through porous media. Several commonly-used rheological models of power-law and Bingham plastic non-Newtonian fluids have been incorporated in the simulator. A Buckley-Leverett type analytical solution for one-dimensional, immiscible displacement involving non-Newtonian fluids in porous media has been developed. An integral method is also presented for the study of transient flow of Bingham fluids in porous media. In addition, two well test analysis methods have been developed for analyzing pressure transient tests of power-law and Bingham fluids, respectively. Applications are included to demonstrate this new technology. The physical mechanisms involved in immiscible displacement with non-Newtonian fluids in porous media have been studied using the Buckley-Leverett type analytical solution. In another study, an idealized fracture model has been used to obtain some insights into …
Date:
February 1, 1990
Creator:
Wu, Yu-Shu.
System:
The UNT Digital Library
Theoretical Studies of Non-Newtonian and Newtonian Fluid Flowthrough Porous Media
A comprehensive theoretical study has been carried out on the flow behavior of both single and multiple phase non-Newtonian fluids in porous media. This work is divided into three parts: (1) development of numerical and analytical solutions; (2) theoretical studies of transient flow of non-Newtonian fluids in porous media; and (3) applications of well test analysis and displacement efficiency evaluation to field problems. A fully implicit, integral finite difference model has been developed for simulation of non-Newtonian and Newtonian fluid flow through porous media. Several commonly-used rheological models of power-law and Bingham plastic non-Newtonian fluids have been incorporated in the simulator. A Buckley-Leverett type analytical solution for one-dimensional, immiscible displacement involving non-Newtonian fluids in porous media has been developed. Based on this solution, a graphic approach for evaluating non-Newtonian displacement efficiency has been developed. The Buckley-Leverett-Welge theory is extended to flow problems with non-Newtonian fluids. An integral method is also presented for the study of transient flow of Bingham fluids in porous media. In addition, two well test analysis methods have been developed for analyzing pressure transient tests of power-law and Bingham fluids, respectively. Applications are included to demonstrate this new technology. The physical mechanisms involved in immiscible displacement with …
Date:
February 1, 1990
Creator:
Wu, Y.S.
System:
The UNT Digital Library
Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part I. Regeneration of Amine-Carboxylic Acid Extracts
Two novel regenerated solvent extraction processes are examined. The first process has the potential to reduce the energy costs inherent in the recovery of low-volatility carboxylic acids from dilute aqueous solutions. The second process has the potential for reducing the energy costs required for separate recovery of ammonia and acid gases (e.g. CO{sub 2} and H{sub 2}S) from industrial sour waters. The recovery of carboxylic acids from dilute aqueous solution can be achieved by extraction with tertiary amines. An approach for regeneration and product recovery from such extracts is to back-extract the carboxylic acid with a water-soluble, volatile tertiary amine, such as trimethylamine. The resulting trimethylammonium carboxylate solution can be concentrated and thermally decomposed, yielding the product acid and the volatile amine for recycle. Experimental work was performed with lactic acid, succinic acid, and fumaric acid. Equilibrium data show near-stoichiometric recovery of the carboxylic acids from an organic solution of Alamine 336 into aqueous solutions of trimethylamine. For fumaric and succinic acids, partial evaporation of the aqueous back extract decomposes the carboxylate and yields the acid product in crystalline form. The decomposition of aqueous solutions of trimethylammonium lactates was not carried out to completion, due to the high water solubility …
Date:
March 1, 1990
Creator:
Poole, L. J. & King, C. J.
System:
The UNT Digital Library
Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part II. Recovery of Ammonia from Sour Waters
Two novel regenerated solvent extraction processes are examined. The first process has the potential to reduce the energy costs inherent in the recovery of low-volatility carboxylic acids from dilute aqueous solutions. The second process has the potential for reducing the energy costs required for separate recovery of ammonia and acid gases (e.g. CO{sub 2} and H{sub 2}S) from industrial sour waters. The recovery of carboxylic acids from dilute aqueous solution can be achieved by extraction with tertiary amines. An approach for regeneration and product recovery from such extracts is to back-extract the carboxylic acid with a water-soluble, volatile tertiary amine, such as trimethylamine. The resulting trimethylammonium carboxylate solution can be concentrated and thermally decomposed, yielding the product acid and the volatile amine for recycle. Experimental work was performed with lactic acid, SUCCiOlC acid, and fumaric acid. Equilibrium data show near-stoichiometric recovery of the carboxylic acids from an organic solution of Alamine 336 into aqueous solutions of trimethylamine. For fumaric and succinic acids, partial evaporation of the aqueous back extract decomposes the carboxylate and yields the acid product in crystalline form. The decomposition of aqueous solutions of trimethylammonium lactates was not carried out to completion, due to the high water solubility …
Date:
March 1, 1990
Creator:
Poole, L. J. & King, C. J.
System:
The UNT Digital Library
Perceptions of the Sudanese Professional Working in Saudi Arabia on Migration and Economic Development of the Sudan
The brain drain emerged as a phenomenon in the Sudan in the early 1970's when a change in the political system was followed by a change in the economic situation. The oil price increases created a dynamic process that led to attractive employment conditions in the petroleum producing countries such as Saudi Arabia and to depressed economic conditions in the developing countries like the Sudan. The purposes of the study are to (a) obtain information on the Sudanese professionals working in Saudi Arabia, (b) determine what major factors influence their migration, and (c) to develop policy recommendations on the flow of migration from the Sudan. The population of this study were Sudanese professionals living in Saudi Arabia. Data were generated through surveying a sample of 300 subjects selected randomly from the defined population. A survey questionnaire based on the research questions was developed for this study. Data from 263 respondents were analyzed. The findings of the study suggest that the majority of the Sudanese professionals working in Saudi Arabia are male, between 30 to 40 years of age. They have many years of experience and a high level of qualifications. The factors that led to their migration are: (a) high …
Date:
March 1990
Creator:
Hamid, Adil A. (Adil Abdelaziz)
System:
The UNT Digital Library
Keeping Good Company: A Critical View of the CIA
Thesis written by a student in the UNT Honors College discussing the Central Intelligence Agency, its operations, its standards, and its future.
Date:
Spring 1990
Creator:
Graham, Stacy
System:
The UNT Digital Library
Stability Constants Important to the Understanding of Plutonium in Environmental Waters, Hydroxy and Carbonate Complexation of Puo{Sub 2}{Sup +}
The formation constants for the reactions PuO{sub 2}{sup +} + H{sub 2}O = PuO{sub 2}(OH) + H{sup +} and PuO{sub 2}{sup +} + CO{sub 3}{sup 2} = PuO{sub 2}(CO{sub 3}){sup {minus}} were determined in aqueous sodium perchlorate solutions by laser-induced photoacoustic spectroscopy. The molar absorptivity of the PuO{sub 2}{sup +} band at 569 nm decreased with increasing hydroxide concentration. Similarly, spectral changes occurred between 540 and 580 nm as the carbonate concentration was increased. The absorption data were analyzed by the non-linear least-squares program SQUAD to yield complexation constants. Using the specific ion interaction theory, both complexation constants were extrapolated to zero ionic strength. These thermodynamic complexation constants were combined with the oxidation-reduction potentials of Pu to obtain Eh versus pH diagrams. 120 refs., 35 figs., 12 tabs.
Date:
April 20, 1990
Creator:
Bennett, D. A.
System:
The UNT Digital Library
Bacterially induced precipitation of CaCO{sub 3}: An example from studies of cyanobacterial mats. Final report
Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria by which they can be recognized in recent sediments, or in the rock record. Cultures of aerobic and facultative bacteria from cyanobacterial mats on Andros Island, Bahamas, and Baffin Bay, Texas, induced the precipitation of calcium carbonate under controlled conditions. Crusts, the largest features formed, are composed of 5--200{mu}m diameter bundles which are, in turn, composed of numerous individual crystals. The smallest observed features are 0.1--0.4{mu}m spheres and rods which comprise some individual crystals and crystal bundles. Crystal bundles resembling rhombohedra, tetragonal disphenoids, tetragonal dipyramids, and calcite dumbbells appear to be uniquely bacterial in origin, and they have all been observed in recent sediments. Swollen rods, discs, curved dumbbells, and 50--200{mu}m optically continuous crystals resembling brushes may be uniquely bacterial in origin, however, they have not been reported by other laboratories nor observed in natural settings. Presence of any of these forms in recent sediments should be taken as strong evidence for bacterial influence. Spheres and aragonite dumbbells have also been …
Date:
April 30, 1990
Creator:
Chafetz, H. S.
System:
The UNT Digital Library
Adlerian Counseling and the Early Recollections of Children
This investigation used a descriptive approach to explore and evaluate early recollection changes of children in Adlerian counseling. The study addressed seven research questions regarding early recollection change for children in Adlerian counseling as compared with children not in Adlerian counseling. The treatment group was engaged in Adlerian counseling for 10 weeks. The investigator conducted pre-counseling and post-counseling interviews to collect six total early recollections from 9 subjects. The comparison group was not engaged in treatment for counseling. The investigator conducted interviews at an interval of 10 weeks to collect six total early recollections from 9 subjects. The Manaster-Perryraan Manifest Content Early Recollection Scoring Manual was used for analysis of early recollection content. Following training sesions, raters scored absence or presence of content variables in early recollections. Tables were employed to reveal findings of early recollection content change as addressed by the seven research questions of this study. A descriptive evaluation of' the data indicated that the treatment group manifested greater change in early recollection content as compared to the comparison group in six of seven research questions. On the basis of these findings, this study concluded that early recollections of children are a valid source of potential in measuring …
Date:
May 1990
Creator:
Statton, Jane Ellis Porter
System:
The UNT Digital Library
Adolescent Discouragement: Development of an Assessment Instrument
The Adolescent Discouragement Indicator (ADI) was developed to assess the Adlerian construct of discouragement. The 75-item ADI contains five subscales corresponding to the five life tasks specified in Individual Psychology and is specifically designed to pinpoint the area and degree of adolescent discouragement. Item selection was based on ratings by five prominent Adlerians and item correlation with subscale scores. Age and sex norms for the ADI were established on 225 females and 299 males 12 to 18 years of age. Findings indicate that female adolescents are less discouraged than male adolescents on all scales except the love scale and both sexes reported the least amount of discouragment on the love scale. The only significant difference among the age groups is between the 13-year-olds and the 15, 16, and 17-year-olds on the love scale. An internal consistency coefficient of .95, a 2-week test-retest coefficient of .89, and a 4-week test-retest coefficient of .92 indicates that the ADI is a reliable instrument. Negative and significant (p < .001) correlations between the ADI and Social Interest Index (Greever, Tseng, & Friedland, 1973) and between the ADI and the Social Interest Scale (Crandall, 1975) contribute to construct validity and support Adler's belief that discouragement …
Date:
May 1990
Creator:
Lingg, MaryAnn
System:
The UNT Digital Library
Agenda-Setting by Minority Political Groups: A Case Study of American Indian Tribes
This study tested theoretical propositions concerning agenda-setting by minority political groups in the United States to see if they had the scope to be applicable to American Indian tribes or if there were alternative explanations for how this group places its agenda items on the formal agenda and resolves them. Indian tribes were chosen as the case study because they are of significantly different legal and political status than other minority groups upon which much of the previous research has been done. The study showed that many of the theoretical propositions regarding agenda-setting by minority groups were explanatory for agenda-setting by Indian tribes. The analyses seemed to demonstrate that Indian tribes use a closed policy subsystem to place tribal agenda items on the formal agenda. The analyses demonstrated that most tribal agenda items resolved by Congress involve no major policy changes but rather incremental changes in existing policies. The analyses also demonstrated that most federal court decisions involving Indian tribes have no broad impact or significance to all Indian tribes. The analyses showed that both Congress and the federal courts significantly influence the tribal agenda but the relationship between the courts and Congress in agenda-setting in this area of policy …
Date:
May 1990
Creator:
McCoy, Leila M. (Leila Melanie)
System:
The UNT Digital Library
An Analysis of Verticality and Architectural Reference in the Presentation of Figurative Sculpture
The purpose of this study was to analyze the physical issues of verticality and architectural reference in the presentation of my figurative sculpture and to determine how these issues affect me as viewer. In this analysis, the term architectural reference refers to the fundamental structural elements historically associated with architecture, such as column, pylon, pilaster, pyramid, elevated platform, and bilateral symmetry. The term does not address broader architectural concepts such as spatial organization, circulation, or shelter.
Date:
May 1990
Creator:
Pavlovsky, Micheal D.
System:
The UNT Digital Library
Anger Reduction in Closed Head Injured Individuals with Group Social Skills Training
In the present study, an anger management treatment program was compared to a pseudo-social skills training program (self-help group) and waiting list control group to determine its effectiveness in reducing irritable/angry behavior in head injured subjects. Subjects consisted of 28 adults with previous head injury trauma who had difficulty with excessive irritability and anger. Subjects averaged 35.4 years of age and had an average of 8.9 years post head injury. Treatment consisted of 10 group sessions over a five week period. Anger management training was designed to teach subjects self management skills aimed at reducing the frequency of angry acting out behavior. Training methods included role playing, relaxation training, assertiveness training and cognitive restructuring. The pseudo-social skills training group was a self-help group designed to encourage discussion of irritability problems without teaching specific coping techniques. To assure some degree of homogeneity in cognitive abilities among subjects, minimum eligibility scores were required on five subtests of the Wechsler Adult Intelligence Scale - Revised and the Peabody Picture Vocabulary Test. Dependent measures were pre and posttreatment scores obtained from five categories of the Katz Adjustment Scale - Relative form: belligerence, negativity, general psychopathology, social obstreperousness, and social role functioning. In addition, pre …
Date:
May 1990
Creator:
Nicolette, Myrna K. (Myrna Kay)
System:
The UNT Digital Library
Art by the Yard: Exploring Narrative Drawings
I am interested, both from a personal standpoint and from a cultural perspective, in pursuing the meaning of thes eimages singly and as they combine with others. In turn, the results, I hope, will lead to the discovery of more images for my image encyclopedia. After this introduction subsequent chapters will explore my reasons for the combinations of images I choose and will place the finished drawings in their contemporary art context. My goal will be to note the changing meanings of the objects as they interact serially.
Date:
May 1990
Creator:
Sale, Thomas Fancher
System:
The UNT Digital Library
"Beowulf": Myth as a Structural and Thematic Key
Very little of the huge corpus of Beowulf criticism has been directed at discovering the function and meaning of myth in the poem. Scholars have noted many mythological elements, but there has never been a satisfactory explanation of the poet's use of this material. A close analysis of Beowulf reveals that myth does, in fact, inform its structure, plot, characters and even imagery. More significant than the poet's use of myth, however, is the way he interlaces the historical and Christian elements with the mythological story to reflect his understanding of the cyclic nature of human existence. The examination in Chapter II of the religious component in eighth-century Anglo-Saxon culture demonstrates that the traditional Germanic religion or mythology was still very much alive. Thus the Beowulf poet was certainly aware of pre-Christian beliefs. Furthermore, he seems to have perceived basic similarities between the old and new religions, and this understanding is reflected in the poem. Chapter III discusses the way in which the characterization of the monsters is enriched by their mythological connotations. Chapter IV demonstrates that the poet also imbued the hero Beowulf with mythological significance. The discussion in Chapter V of themes and type-scenes reveals the origins of …
Date:
May 1990
Creator:
Aitches, Marian A. (Marian Annette)
System:
The UNT Digital Library
I, Blavatsky: A One-Act Opera
I, Blavatsky is a one-act opera based on the life of Helena Petrovna Blavatsky, a nineteenth-century Russian princess and co-founder of a religious organization called the Theosophical Society. The libretto, by the composer, involves a cast of three principal soloists and minor roles for six more singers who are also participants in a small chorus. The text format features free verse alternating with regular, rhymed strophes. Accompaniment is provided by a piano. Melodic structure combines some nineteenth-century Romantic idioms with twentieth-century style. Most of the melodic and harmonic material was intuitively composed to express the text. Rhythmic and stylistic contrasts are accomplished in the representation of the extensive travels of the main character. Stage directions involve a stylized set, several scenes requiring minimal set changes, magical effects to represent that facet of Blavatsky's life, and onstage costume changes for several characters. Approximate duration is one hour.
Date:
May 1990
Creator:
Cooper, Steve, 1951 Dec. 4-
System:
The UNT Digital Library
Bonaro Wilkinson Overstreet: Her Significance in Adult Education
The purpose of this study was to determine Bonaro Wilkinson Overstreet's significance and development as a leader in adult education. This study provided information on her life, her individual and collaborative contributions with Harry Overstreet in adult education, and her interest in poetry. Data were collected using online database searching; review of published, unpublished, and informal documents of Bonaro Overstreet; and correspondence and interviews with professional colleagues, employers, and personal acquaintances. Interviews were conducted with current authorities in the field of adult education for informational purposes. Bonaro Overstreet did not influence or alter the course of adult education as a field of study. Her strength was in her role of practitioner and contributor to research, theory, and professional development of the adult education field. She broadened the depth of adult education as an advocate of knowing oneself and acting responsibly in the context of democratic responsibility.
Date:
May 1990
Creator:
Dorman, Brigid Byrne
System:
The UNT Digital Library
Characterization of leaky faults
Leaky faults provide a flow path for fluids to move underground. It is very important to characterize such faults in various engineering projects. The purpose of this work is to develop mathematical solutions for this characterization. The flow of water in an aquifer system and the flow of air in the unsaturated fault-rock system were studied. If the leaky fault cuts through two aquifers, characterization of the fault can be achieved by pumping water from one of the aquifers, which are assumed to be horizontal and of uniform thickness. Analytical solutions have been developed for two cases of either a negligibly small or a significantly large drawdown in the unpumped aquifer. Some practical methods for using these solutions are presented. 45 refs., 72 figs., 11 tabs.
Date:
May 1, 1990
Creator:
Shan, Chao
System:
The UNT Digital Library
The Church of San Cayetano de la Valenciana, Guanajuato, Mexico: a Study of its Mexican Churrigueresque Architecture and Decoration
This study is devoted to a critical examination of the architectural structure and sculpture of the church of San Cayetano de La Valenciana in Guanajuato, Mexico, concentrating on the ornamentation of the exterior portals and the interior altar retables. This paper traces the development of the Churrigueresque phase within the Baroque period of Mexican religious architecture and analyzes specific application of this style to the church of La Valenciana. Stylistic and iconographic components are discussed and a review of significant literature on this subject is included.
Date:
May 1990
Creator:
Quantz, Pamela A. (Pamela Ann)
System:
The UNT Digital Library
Comparability of the WPPSI-R and the Stanford-Binet: Fourth Edition
The purpose of this study was to compare the performance of children on the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R) with their performance on the Stanford-Binet Intelligence Scale: Fourth Edition (SB:FE). One hundred and four children between 3 and 7 years of age were administered both tests. A moderate correlation was found between the WPPSI-R Full Scale IQ and the SB:FE Composite Score with a Pearson product-moment correlation of .46. This correlation suggests that the two tests are not interchangeable measures of children's intelligence. They may measure different, equally important aspects of intelligence. As both tests used are relatively new, the current findings should be considered one step in the accumulation of knowledge about the usefulness of the WPPSI-R.
Date:
May 1990
Creator:
Bass, Catherine
System:
The UNT Digital Library
A Concurrent Validation Study of a Paper and Pencil Test Battery for a Sales Position
Participating in this study were 251 decorator consultants. The decorator consultant position is a direct sales position. The primary objective of this study was to demonstrate that a relationship existed between decorators' selection test scores and their job performance. The SRA Verbal Form, the EAS Numerical Ability Test, the EAS Space Visualization Test, and the Sales Attitude Checklist were evaluated as potential selection tests. Behavioral criteria and managerial ratings were used to assess job performance. Correlational analyses revealed that all the tests but the SRA Verbal Form were significantly correlated with two or more criteria.
Date:
May 1990
Creator:
Irons, Deedra Kim
System:
The UNT Digital Library
A Cost-Benefit Analysis of the Implementation of Texas House Bill 72 in Selected Texas Public School Districts
This study was conducted to analyze the effect of implementation of Texas House Bill 72 on budgets of selected Texas public school districts and to ascertain educational benefits to students derived from implementation of the bill as perceived by superintendents. Questionnaires were sent to superintendents of the Region 10 Education Service Center to determine perceived educational benefits to students. A demographic data sheet provided information for classifying respondents by educational experience, superintendent experience, and district enrollment classifications. Sixty-two districts responded. Official public school budget data for each district were analyzed for fiscal years 1983 through 1986 as were data from the questionnaire. Overall statistical information was gleaned through CONDESCRIPTIVE. Mean total expenditures, mean total tax rate, and state fiscal aid data were compiled, tabulated, and reported for each enrollment classification and entire sample. In addition, a t-test between the difference of two independent means at a probability level of .05 was applied. The two independent means were the averages of data for the two years prior to and after implementation of the law for expenditures, tax rates, and state fiscal contributions. Data comparing local and state expenditures were compiled, tabulated, and reported for each group to compare local and state …
Date:
May 1990
Creator:
Bradford, Ronald W. (Ronald Wayne)
System:
The UNT Digital Library
Critical Expectations of Workers Undergoing a Major Change in the Workplace
In an effort to determine whether job satisfaction and expectations in a group of workers undergoing major change in the workplace differ from groups of workers not undergoing major change, data were collected from three groups of workers at the operator level in a major U.S. electronics manufacturing company. Two of the groups were not undergoing a major work redesign and served as control groups. A group undergoing the early stages of a major work redesign, characterized primarily by their formation into a self-managed work team, served as the experimental group. The experimental group and one control group were located at the same manufacturing plant, while the other control group was located at another plant. It was hypothesized that the group of workers undergoing change would differ in job satisfaction and that over time, the difference would grow. It was also hypothesized that the group undergoing change would have different expectations about the nature of their jobs in the future. Data were collected from members of the three groups using a modified version of Hackman and Oldham's (1980) Job Diagnostic Survey, with two administrations of the survey seven months apart. Data were analyzed using a 3 (Groups) X 2 (Perception: …
Date:
May 1990
Creator:
Cheney, Alan B. (Alan Bruce)
System:
The UNT Digital Library