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Critical Thinking Skills Related to Pre-Clinical Medical School Course Examinations
The major purpose of this study was to determine if pre-clinical medical school course examinations reflect critical thinking skills. The entire second year class from a medical school in the southwest made up the population. Student examination results from the first two years as well as scores on the Watson-Glaser Critical Thinking Appraisal were used in this study.
Date:
May 1992
Creator:
Miller, Deborah Ann, 1952-
System:
The UNT Digital Library
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
Evolution of Vacancy Supersaturations in MeV Si Implanted Silicon
High-energy Si implantation into silicon creates a net defect distribution that is characterized by an excess of interstitials near the projected range and a simultaneous excess of vacancies closer to the surface. This defect distribution is due to the spatial separation between the distributions of interstitials and vacancies created by the forward momentum transferred from the implanted ion to the lattice atom. This dissertation investigates the evolution of the near-surface vacancy excess in MeV Si-implanted silicon both during implantation and post-implant annealing. Although previous investigations have identified a vacancy excess in MeV-implanted silicon, the investigations presented in this dissertation are unique in that they are designed to correlate the free-vacancy supersaturation with the vacancies in clusters. Free-vacancy (and interstitial) supersaturations were measured with Sb (B) dopant diffusion markers. Vacancies in clusters were profiled by Au labeling; a new technique based on the observation that Au atoms trap in the presence of open-volume defects. The experiments described in this dissertation are also unique in that they were designed to isolate the deep interstitial excess from interacting with the much shallower vacancy excess during post-implant thermal processing.
Date:
May 1999
Creator:
Venezia, Vincent C.
System:
The UNT Digital Library
Introduction of Self-Manage Work Teams at a Brownfield Site: a Study of Organization-Based Self-Esteem and Performance
This empirical study is aimed at understanding the patterns of relationships among the organization structure of self-managed work teams in terms of three sets of constructs: 1. organization-based self-esteem; 2. consequent behaviors of intrinsic work motivation, general job satisfaction, organization citizenship, and organization commitment; and 3. performance. The primary significance of this study is that it adds to the pool of empirical knowledge in the field of self-managed work team research. The significance of this study to practicing managers is that it can help them make better-informed decisions on the use of the self-managed work team structure. This study was a sample survey composed of five standardized questionnaires using a five-point Likert-type scale, open-ended questions, and demographic questions. Unstructured interviews supplemented the structured survey and for means of triangulation of results. The variables were analyzed using regression analysis for the purpose of path analysis. The site was a manufacturing plant structured around self-managed work teams. The population was full-time, first-line production employees.
Date:
May 1994
Creator:
Borycki, Christine
System:
The UNT Digital Library
Prediction of Aggressive and Socially Disruptive Behavior among Forensic Patients: a Validation of the Psychopathy Checklist Screening Version
Psychopathic criminals commit more crimes, are more prone to recidivism, and more likely to engage in violent crimes and other aggressive behavior than nonpsychopathic criminals. Less is known about forensic patients, both with and without psychopathy, and their aggression. In the current study, patients in a maximum security hospital were examined with respect to their psychopathy and its predictive value on institutional management and dangerousness. In this regard, the Psychopathy Checklist (PCL) and the Psychopathy Checklist - Revised (PCL-R) have proven to be valid and reliable measures of psychopathy. The present study was an attempt to establish predictive validity for a new version: the Psychopathy Checklist Screening Version (PCLSV). As such, this study examined the PCL-SV's relationship to (a) diagnoses of Antisocial Personality Disorder according to DSM-III-R criteria and (b) the Personality Assessment Inventory (PAI) Aggression, Drug Problems, and Antisocial Features scales. The influence of major Axis I disorders on the assessment of psychopathy with the PCLSV was also examined. Participants were 150 male forensic psychiatric patients at Vernon State Hospital who were committed for various reasons: incompetence to stand trial, initial evaluation and treatment after having been found not guilty by reason of insanity, and manifest dangerousness. Chart reviews …
Date:
May 1997
Creator:
Hill, Christie D.
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
Small Business Owner-Managers and Corporate Managers: a Comparative Study of Achievement Motivation, Risk Taking Propensity and Preference for Innovation
Despite the economic significance of entrepreneurship, relatively little is known about the entrepreneur, particularly how the entrepreneur differs from the corporate manager. This problem is both cause and symptom of the discord regarding definitions of the entrepreneur, rendering sampling, research replication and generalizations about entrepreneurs problematic. As a result, inquiry has failed to adequately establish how entrepreneurs differ from managers, a problem partially stemming from a dearth of methodologically rigorous comparisons of entrepreneurs with managers. The primary purpose of this study was to investigate the potential of psychological constructs to predict a proclivity for entrepreneurship. Moreover, differences in types of small business owner-managers were also investigated. Included in the research model were three common themes in the entrepreneurship literature: achievement motivation, risk taking propensity and preference for innovation. Also incorporated were the interactions of the psychological constructs, as well as individual and firm demographic variables.
Date:
May 1995
Creator:
Stewart, Wayne H. (Wayne Howard)
System:
The UNT Digital Library
Iconic Ida: Tennyson's The Princess and Her Uses
Alfred Lord Tennyson's The Princess: A Medley has posed interpretative difficulties for readers since its 1847 debut. Critics, editors, and artists contemporary with Tennyson as well as in this century have puzzled over the poem's stance on the issue of the so-called Woman Question. Treating Tennyson as the first reader of the poem yields an understanding of the title character, Princess Ida, as an ambassador of Tennyson's optimistic and evolutionary views of human development and links his work to that of visionary educators of nineteenth-century England. Later artists, however, produced adaptations of the poem that twisted its hopefulness into satirical commentary, reduced its complexities to ease the task of reading, and put it to work in various causes, many ranged against the improvement of women's condition. In particular, a series of editions carried The Princess into various nations, classrooms, and homes, promoting interpretations that often obscure Tennyson's cautious optimism.
Date:
May 1997
Creator:
Guidici, Cynthia (Cynthia Dianne)
System:
The UNT Digital Library
The American Eve: Gender, Tragedy, and the American Dream
America has adopted as its own the Eden myth, which has provided the mythology of the American dream. This New Garden of America, consequently, has been a masculine garden because of its dependence on the myth of the Fall. Implied in the American dream is the idea of a garden without Eve, or at least without Eve's sin, traditionally associated with sexuality. Our canonical literature has reflected these attitudes of devaluing feminine power or making it a negative force: The Scarlet Letter, Moby-Dick, Adventures of Huckleberry Finn, The Great Gatsby, and The Sound and the Fury. To recreate the Garden myth, Americans have had to reimagine Eve as the idealized virgin, earth mother and life-giver, or as Adam's loyal helpmeet, the silent figurehead. But Eve resists her new roles: Hester Prynne embellishes her scarlet letter and does not leave Boston; the feminine forces in Moby-Dick defeat the monomaniacal masculinity of Ahab; Miss Watson, the Widow Douglas, and Aunt Sally's threat of civilization chase Huck off to the territory despite the beckoning of the feminine river; Daisy retreats unscathed into her "white palace" after Gatsby's death; and Caddy tours Europe on the arm of a Nazi officer long after Quentin's suicide, …
Date:
May 1993
Creator:
Long, Kim Martin
System:
The UNT Digital Library
Women's and Men's Perceptions Regarding Perceived Speaker Sex and Politeness of Given Utterances
Women's and men's responses regarding perceived speaker sex and the politeness of given utterances were examined through the use of a questionnaire administered to 90 people, 45 men and 45 women. The questionnaire required respondents to rate the politeness of each utterance and label each as being more likely spoken by a man or by a woman. Factors possibly affecting perceptions--such as power, prestige, and the stereotypical conversational structures of both men and women--were addressed through others' research in this area. Additionally, all tested sentences were analyzed in light of linguistic politeness theory regarding on-record and off-record speech. This analysis details each utterance through examining the type of politeness strategy each utterance typifies.
Date:
May 1995
Creator:
Johnson, Deanna Michelle
System:
The UNT Digital Library
An Investigation of Psychopathy in a Female Jail Sample: a Study of Convergent and Discriminant Validity
The present study was designed to assess both the construct of psychopathy in a female jail sample as well as the quality of the measures that have been employed to assess this personality style. Utilizing the multitrait-multimethod matrix proposed by Campbell and Fiske (1959), the construct of psychopathy was measured via three instruments: (a) the Antisocial Scale of the Personality Assessment Inventory, (b) the Psychopathy Checklist - Revised, and (c) the Antisocial Scale of the Personality Disorder Examination. In addition, the predictive validity of each of these measures of psychopathy was evaluated to determine their ability to predict institutional violence and non-compliance. The results revealed significant convergence and divergence across the three instruments supporting the construct of psychopathy in a female jail sample. In addition, the measures of psychopathy demonstrated moderate predictive validity.
Date:
May 1996
Creator:
Salekin, Randall T. (Randall Todd)
System:
The UNT Digital Library
A Study of Quantum Electron Dynamics in Periodic Superlattices under Electric Fields
This thesis examines the quantum dynamics of electrons in periodic semiconductor superlattices in the presence of electric fields, especially uniform static fields. Chapter 1 is an introduction to this vast and active field of research, with an analysis and suggested solutions to the fundamental theoretical difficulties. Chapter 2 is a detailed historical review of relevant theories, and Chapter 3 is a historical review of experiments. Chapter 4 is devoted to the time-independent quantum mechanical study of the electric-field-induced changes in the transmission properties of ballistic electrons, using the transfer matrix method. In Chapter 5, a new time-dependent quantum mechanical model free from the fundamental theoretical difficulties is introduced, with its validity tested at various limiting cases. A simplified method for calculating field-free bands of various potential models is designed. In Chapter 6, the general features of "Shifting Periodicity", a distinctive feature of this new model, is discussed, and a "Bloch-Floquet Theorem" is rigorously proven. Numerical evidences for the existence of Wannier-Stark-Ladders are presented, and the conditions for its experimental observability is also discussed. In Chapter 7, an analytical solution is found for Bloch Oscillations and Wannier-Stark-Ladders at low electric fields. In Chapter 8, a new quantum mechanical interpretation for Bloch …
Date:
May 1996
Creator:
Yuan, Daiqing
System:
The UNT Digital Library
South-East Asia College: History, Development, Problems, and Issues Related to Achieving University Status
The purpose of this study is to describe the history, development, problems, and issues related to achieving university status of South-East Asia College from 1974 to 1993. This historical research used records and documents from South-East Asia College and the Association of Private Higher Education Institutions of Thailand as primary sources. Also interviews with the president, faculty and staff of South-East Asia College were used. Secondary Sources were reports and publications from the Ministry of University Affairs in Thailand. The areas of emphasis in the study were government policies on private higher education, legislation that initiated the founding of the college, the founder, the college's goals, financial sources, curriculum, library, faculty, students, and buildings. It was found that the Thai government encourages the establishment of private higher education institutions. The Private Higher Educational Institution Act of 1979 was enacted to allow private universities to be equal to government universities. South-East Asia College was founded in 1974 by the Khunya Plak Muanpiew Foundation with the purpose of training Thai students for industrial technologies and business sectors. The college requested university status in April, 1987. The first attempt was turned down. Four areas not meeting the requirements were the library, faculty, students, …
Date:
May 1994
Creator:
Chaowichitra, Jiravadee
System:
The UNT Digital Library
Ethnic Identity : An Examination of Hispanic International Students
I interviewed twenty-four International students from the following countries: Mexico, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Peru, Colombia, Brazil, Puerto Rico and Spain. Hereafter I shall refer to the respondents as Hispanic International students. My primary interest was to learn the way in which Hispanic International students defined themselves in view of ethnic definitions imposed on them by the administrative system in the U.S. First, Hispanic International students defined themselves primarily by their nationality. The second finding dealt with the usage of language. The Hispanic International students spoke Spanish with relatives and friends. They spoke English when a non-Spanish speaker joined the conversation. The third finding was related to the problems and adaptations encountered by Hispanic International students.
Date:
May 1996
Creator:
Correa, Minerva
System:
The UNT Digital Library
Synthesis of the Personal and the Political in the Works of May Stevens
This thesis is an investigation of the way in which the painter May Stevens (b. 1924) synthesizes her personal experiences and political philosophy to form complex and enduring works of art. Primary data was accumulated through an extended interview with May Stevens and by examining her works on exhibit in New York and Boston. An analysis of selected works from her "Big Daddy" and "Ordinary/Extraordinary" series revealed how her personal feelings about her own family became entwined with larger political issues. As an important member of the feminist art movement that evolved during the 1970s, she celebrated this new kinship among women in paintings that also explored the contradictions in their lives. In more recent work she has explored complex social issues such as teenage prostitution, sexism, and child abuse in a variety of artistic styles and media. This study investigates how May Stevens continues to portray issues of international significance in works that consistently engage the viewer on a personal, almost visceral level.
Date:
May 1998
Creator:
Abbott, Janet Gail
System:
The UNT Digital Library
Characterization of Aspartate Transcarbamoylase and Dihydroorotase in Moraxella Catarrhalis
Bacterial aspartate transcarbamoylases (ATCase's) are divided into three classes that correspond to taxonomic relationships within the bacteria. The opportunistic pathogen Moraxeila catarrhalis has undergone several reclassifications based on traditional microbiological criteria. The previously uncharacterized ATCase from M. catarrhalis was purified to homogeneity and its chemical properties characterized. The ATCase from M. catarrhalis is a class C ATCase with an apparent molecular mass of 480-520 kDa. The M. catarrhalis ATCase is a dodecomer composed of six 35 kDa polypeptides and six 45 kDa polypeptides. The enzyme has an unusually high pH optimum of greater than pH 10. The enzyme exhibited hyperbolic kinetic with a Km for aspartate of 2 mM. A single, separate 78 kDa dihydroorotase from M. catarrhalis was identified and it was not associated with ATCase. These data support the reclassification of M. catarrhalis out of the Neisseriaceae family.
Date:
May 1998
Creator:
Fowler, Michael A. (Michael Allen), 1961-
System:
The UNT Digital Library
Responses of Cultured Neuronal Networks to the Cannabinoid Mimetic Anandamide
The effects of cannabinoid agonists on spontaneous neuronal network activity were characterized in murine spinal cord and auditory cortical cultures with multichannel extracellular recording using photoetched electrode arrays. Different cultures responded reproducibly with global decreases of spiking and bursting to anandamide and methanandamide, but each agonist showed unique minor effects on network activity. The two tissues responded in a tissue-specific manner. Spontaneous activity in spinal tissue was terminated by 1 μM anandamide and 6.1 μM methanandamide. Cortical activity ceased at 3.5 μM and 2.8 μM respectively. Irreversible cessation of activity was observed beyond 8 μM for both tissues and test substances. Palmitoylethanolamide, demonstrated that CB2 receptors were not present or not responsive. However, the data strongly suggested the presence of CB1 receptors.
Date:
May 1998
Creator:
Morefield, Samantha I. (Samantha Irene)
System:
The UNT Digital Library
Life-Style Themes of Women Who Emerge as Leaders in Small Group Settings
This study investigated the effects of personality characteristics on emergent leadership in small group settings. Two instruments were used to assess personality factors: The BASIS-A and the California Personality Inventory (CPI). A sociometric tool was developed to elicit leader ranking of female group members. The BASIS-A, was used to test for Taking Charge and Wanting Recognition lifestyles in women who emerged as leaders. The CPI was used to assess female emergent leaders for Dominance and Leadership Potential. The two instruments and a sociometric form were distributed to 115 female graduate counselor-in-training students the last week of their group counseling experience. This survey resulted in 55 respondents (N=55) from eleven discussion groups. It was expected that women who had the highest averaged leader rank would demonstrate higher test scores in Dominance, Leadership Potential, Taking Charge, and Wanting Recognition than women who received a lower averaged leader rank. It was also thought that these four test factors would be highly related. If so, a case would be made to use the BASIS-A as an emergent leader assessment tool because it is consistently based in one psychological theory. No significant effect was found between the highest leader rank and three of the test …
Date:
May 1996
Creator:
Gray, Virginia C.
System:
The UNT Digital Library
An Investigation into the Stability of Students' Timbre Preferences from the Sixth through the Tenth Grade
The purpose of the study was to determine whether students' timbre preferences in the sixth grade remain stable through the tenth grade. The investigation also examined whether gender, band instruction, or musical home environment makes any difference in influencing the stability of students' timbre preferences from grade six through ten. Students' timbre preferences at the beginning of the study were compared to their preferences four years later. The students' timbre preferences were obtained by employing Gordon's Instrument Timbre Preference Test (ITPT). A questionnaire was also utilized at the conclusion of the study to determine which students had musical home environments and which did not. All sixth grade students enrolled in a single school district took the ITPT. Each student's scores were tallied and ranked in order to determine their timbre preferences; four years later they were retested and their scores were ranked again.
Date:
May 1995
Creator:
May, Brack M. (Brack Miles)
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
Assessment of the Perceived Competencies Possessed by Women Administrators in Vocational Education at Community Colleges in Texas
The need for a high-quality workforce to meet increased competition in the world economy has increased the need for competent vocational administrators in public 2-year postsecondary institutions. Researchers have agreed that vocational education is in a state of metamorphosis and must change to meet its challenges in the coming century. At the same time, more women are seeking and obtaining vocational administrative positions. Several studies have been done to identify the competencies needed by vocational administrators to perform their duties, but there has been little research on the actual ability to perform the administrative tasks identified by these studies. Two main purposes of this study are: (a) to determine the perceived level of administrative competencies possessed by women administrators in vocational education at the community college level in Texas; (b) to determine the adequacy of the preservice training received by these administrators to perform their administrative functions. Of the 175 women administrators randomly selected to participate in the study, 71% completed the Administrator Task Inventory. In addition to the descriptive statistics, two multiple regression analyses were tested. First, principal component analysis was used to reduce the number of dependent variables from 11 to 2, after which two multiple regression analyses …
Date:
May 1997
Creator:
Chiawa, Chioma B. (Chioma Bernadette)
System:
The UNT Digital Library
An Investigation of the Relationship between Work Value Congruence in a Dyad and Organizational Commitment as Mediated by Organizational Influences
Researchers suggest that value congruence in superior-subordinate dyads results in positive outcomes for an organization (Kemelgor, 1980; Meglino, Ravlin, & Adkins, 1989; 1990; Parkington & Schneider, 1979; Senger, 1971; Weeks, Chonko, Kahle, 1989). Further, evidence is presented which suggests that commitment at the organizational level is achieved, in part, through value congruence at the individual level of analysis. Analysis at the individual level reflects the effect of shared values on interpersonal relations. Work value congruence in a dyad enhances the development of a high quality dyadic relationship. The subordinate in such a relationship perceives being allowed more participation in decision making, more positive work experiences, and less role stress (Turban & Jones, 1988). These items have been found to be predictor variables of commitment from Steer's (1977) framework of antecedents. In this study, a research model was proposed which suggests that work value congruence in the subordinate-superior dyad leads to organizational commitment through its effect on subordinate perceptions of role stress characteristics, participation, and work experiences. The model integrates the organizational aspects of the Steer's (1977) framework for organizational commitment with the interpersonal effect of work value congruence. A field study design using a sample of 96 subordinate-superior dyads at …
Date:
May 1997
Creator:
Dale, Kathleen M. (Kathleen Marie)
System:
The UNT Digital Library
Short Term Effects of External Electric Fields on Electrical Activity of the Pineal Gland in Rats
The effects of short term exposure (5 minutes) to EEFs at relatively high dosages (10, 25, 39, kV/m) on the electrical activity in rat pineal glands was studied. Daytime and nighttime recordings were taken from an implanted microelectrode in the gland. The data show that (1) both the activity and frequency were enhanced when the animals were exposed to EEFs at 39 kV/m continuously and discontinuously; (2) the later condition yielded a sustained increase (36%) whereas the former a brief (10 sec) increase. This enhancement was statistically significant under both conditions (day and night). The effects observed were thought to be due to membrane alterations either in the pineal gland itself or in the neural inputs to the gland.
Date:
May 1996
Creator:
Vu, Hung Quoc
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