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  Partner: UNT Libraries
 Department: Department of Counseling, Development and Higher Education
 Degree Discipline: Higher Education
 Collection: UNT Theses and Dissertations
High-temperature corrosion of aluminum alloys: Oxide-alloy interactions and sulfur interface chemistry

High-temperature corrosion of aluminum alloys: Oxide-alloy interactions and sulfur interface chemistry

Date: December 2000
Creator: Addepalli, Swarnagowri
Description: The spallation of aluminum, chromium, and iron oxide scales is a chronic problem that critically impacts technological applications like aerospace, power plant operation, catalysis, petrochemical industry, and the fabrication of composite materials. The presence of interfacial impurities, mainly sulfur, has been reported to accelerate spallation, thereby promoting the high-temperature corrosion of metals and alloys. The precise mechanism for sulfur-induced destruction of oxides, however, is ambiguous. The objective of the present research is to elucidate the microscopic mechanism for the high-temperature corrosion of aluminum alloys in the presence of sulfur. Auger electron spectroscopy (AES), low energy electron diffraction (LEED), and scanning tunneling microscopy (STM) studies were conducted under ultrahigh vacuum (UHV) conditions on oxidized sulfur-free and sulfur-modified Al/Fe and Ni3Al(111). Evaporative deposition of aluminum onto a sulfur-covered iron surface results in the insertion of aluminum between the sulfur adlayer and the substrate, producing an Fe-Al-S interface. Aluminum oxidation at 300 K is retarded in the presence of sulfur. Oxide destabilization, and the formation of metallic aluminum are observed at temperatures > 600 K when sulfur is located at the Al2O3-Fe interface, while the sulfur-free interface is stable up to 900 K. In contrast, the thermal stability (up to at least 1100 ...
Contributing Partner: UNT Libraries
Higher Education and Entrepreneurship: The Relation between College Educational Background and Small Business Success in Texas

Higher Education and Entrepreneurship: The Relation between College Educational Background and Small Business Success in Texas

Date: May 2005
Creator: Al-Zubeidi, Mohammad
Description: This study examined the relationship between success of small businesses and the educational backgrounds of their owners. A survey composed of questions concerning demographics, educational backgrounds, and business success was mailed to 1100 businesses in Dallas, Denton, and Tarrant counties in Texas. There were 228 usable responses which were analyzed by using the Statistical Package of Social Sciences (SPSS12). Data were sorted so that educational level, sales volume, number of employees, and longevity, were identified on a 5-point ordinal scale. Educational major was identified on a 5-point nominal scale. Pearson's correlation was used to determine whether relationships existed between founders' educational background and small business success. Spearman's correlation was used to determine the direction and strength of the relationships. Then educational level and major were combined with age, gender, ethnicity, and industry, to determine the relationships between founders' educational background, and business success. For this purpose a canonical correlation was used. Five opinion questions concerned influence of college education on business success among college graduates and non-college graduates were identified on a 5-point Likert scale and tested using one-way ANOVA, and independent sample t-test. When educational level and major were the only predictors of business success, a statistically significant relationship ...
Contributing Partner: UNT Libraries
Factors Influencing Freshmen Students' College Choice at the University of North Texas: a Focus Group Study

Factors Influencing Freshmen Students' College Choice at the University of North Texas: a Focus Group Study

Date: August 1997
Creator: Armstrong, Jami J. (Jami Joi)
Description: This study focused on factors that may influence freshmen students when choosing their colleges, specifically those who attend metropolitan universities such as the University of North Texas. In addition to identifying major characteristics of the institution that attract students, it also explored the sources of information that students considered important when making their choice about where to attend college. The primary instrument for gathering the data was focus groups. These informal, small groups provided a format for in-depth discussion and probing questioning about the needs, wants and influential factors driving freshmen college choice. Ten focus groups were held with between six and ten students in a specially designed room on the campus of the University of North Texas. A professional moderator was employed and sessions were observed via a two-way mirror and tape recorded for later transcription. The major questions addressed in the focus groups included: What factors influenced students the most to attend the University of North Texas? What did they consider the level of friendliness on campus? And how did the marketing materials that the university distributed impact their decision to attend? The study found that the factors that most influenced freshmen to attend the University of North ...
Contributing Partner: UNT Libraries
The Role of Contract Training by Academic Institutions in Corporate Education and Training Programs

The Role of Contract Training by Academic Institutions in Corporate Education and Training Programs

Date: December 1994
Creator: Ball, Jennie (Jennie Lou)
Description: This study explored the role of contract training provided by North Texas higher education institutions in the education and training programs administered by area businesses employing more than 100 people. A survey instrument was mailed to corporate trainers that were members of the Dallas Chapter of the American Society of Training and Development in businesses employing more than 100 people. A total list of 292 trainers generated 71 usable responses. The purposes of this study were to: (a) determine the extent to which corporations use academic institutions for contract training, (b) determine the academic institutions in North Texas that training managers in the Dallas area believe are suitable contract training partners, (c) identify what subject areas are perceived as top educational priorities by training managers and are perceived to be suitable for contract training by academic institutions, (d) determine educational and training subjects for which corporations would be willing or prefer to utilize contract training by academic institutions, and (e) identify the subjects in which corporations currently use contract training by academic institutions.
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The Assessment of Cognitive Development and Writing Aptitude Within Learning Communities

The Assessment of Cognitive Development and Writing Aptitude Within Learning Communities

Date: August 2001
Creator: Barnard, Miriam K.
Description: Learning communities have emerged as an efficient and effective paradigm for improving undergraduate education, especially for entering freshmen. The academy has become increasingly interested in learning outcomes and student retention, especially as they are related to the assessment of various approaches to educating the whole student. Learning community pedagogy has developed through rigorous research. However, little is known about the impact of this pedagogy upon college students' cognitive development and writing aptitude. Cognitive development theory has been most significantly influenced by the work of William G. Perry, Jr. Though no theory exists which would address the stages of writing development in university students, many composition theorists suggest a correlation between cognitive development and writing aptitude. This study measured cognitive development and writing aptitude in learning community students and non-learning community students, matching them for SAT scores, high school grade point averages, gender, and ethnicity. The research questions of interest were: 1) How does participation in a learning community affect students' cognitive development; and 2) How does participation in a learning community affect students' writing aptitude? The participants were pre- and post-assessed for cognitive development, using the Measure of Intellectual Development (MID). Additionally, participants were preand post-assessed for writing aptitude, using ...
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A descriptive study of students who were accepted for admission at West Texas A&M University but did not enroll

A descriptive study of students who were accepted for admission at West Texas A&M University but did not enroll

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Date: December 1999
Creator: Barton, Mary Edna
Description: Each year, institutions of higher education devote valuable financial and personnel resources in the hope of enhancing student recruitment and matriculation. The purpose of this study was to examine the demographic characteristics, the factors that influenced studentsÂ’ decisions to apply for admission to a university, their educational intentions, and their reasons for not enrolling after they had been admitted. The subjects of the study were first-time freshmen accepted for admission to a mid-size, public, southwestern university who did not enroll for the fall 1997 semester. Statistically significant differences were found when comparing no-shows and enrolled students by gender, ethnicity, age, ACT/SAT score, and distance of their hometown from the university. There were more female no-shows, and more males enrolled than females; a greater percentage of no-shows reported the distance of their hometown to be more than 200 miles; and the mean test score for no-shows was higher. Factors important in the college selection process found to be statistically significant among the groups were: a greater percentage of Minorities than Caucasians reported the importance of the financial aid award or a scholarship offer; students living within 100 miles of the campus reported the proximity of the university as important, advice received ...
Contributing Partner: UNT Libraries
Christian Higher Education at Dallas Theological Seminary: An Assessment of Doctor of Ministry Programs

Christian Higher Education at Dallas Theological Seminary: An Assessment of Doctor of Ministry Programs

Date: August 2001
Creator: Bhatia, Sukhwant Singh
Description: This study involved non-experimental research to identify alumni perceptions of the strengths and weaknesses of the Doctor of Ministry degree program at Dallas Theological Seminary. An international survey was conducted to collect data from 165 Doctor of Ministry degree holders from Dallas Theological Seminary; 131 usable questionnaires were returned. A response rate of 79.4 percent was achieved. The intent of the study was to ascertain (a) the extent to which D.Min. alumni perceive that the objectives and goals of Doctor of Ministry programs at Dallas Theological Seminary are being met, (b) alumni-perceived strengths of Doctor of Ministry programs at Dallas Theological Seminary, (c) alumni-perceived weaknesses of Doctor of Ministry programs at Dallas Theological Seminary, (d) compare the findings of this case study assessment with a 1987 national study of Doctor of Ministry programs, and (e) make recommendations for the improvement of D. Min programs at Dallas Theological Seminary. The pattern that emerged from the data indicates that the D.Min. alumni believe objectives and goals of the Doctor of Ministry program at Dallas Theological Seminary are being met. In the opinion of the alumni, Doctor of Ministry programs at Dallas Theological Seminary has its strengths. The overall opinion of the D.Min. ...
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The Leadership Path of R. Jan LeCroy

The Leadership Path of R. Jan LeCroy

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Date: December 2006
Creator: Blankenbaker, Zarina A.
Description: Recent studies reveal that a considerable number of U.S. community college leaders will be retiring in the next several years. The concern is that with the large turnover, history, culture, and important lessons of leadership will be lost. The current research on the lives of presidents, their career paths, and experiences in community college leadership centers on approaches to the study of leadership at the macro level. Limited research exists in the published literature that reports and analyzes the development of individuals as community college leaders at the micro level. This results in a gap regarding understanding leadership development and strategies to prepare leaders. This study addresses this gap by providing a critical description of the leadership development of one individual who became a community college chancellor and who the literature on the community context indicates contributed to the local and national context for community colleges. Biography is gaining prominence as a legitimate and viable tool in the study of leadership. Few biographical studies currently exist which focus on leadership development in context at the micro level. This dissertation is a biographical, qualitative study of the leadership path and legacy of R. Jan LeCroy, a community college leader. The study ...
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Student Outcomes in Selected Distance Learning and Traditional Courses for the Dallas County Community College District: A Pilot Study

Student Outcomes in Selected Distance Learning and Traditional Courses for the Dallas County Community College District: A Pilot Study

Date: December 2004
Creator: Borcoman, Gabriela
Description: The study compared outcomes for distance learning courses with those of traditional courses offered by the seven campuses of Dallas County Community College District (DCCCD). The course outcomes were defined as completion rate, dropout rate and success rate. Eleven courses offered during the fall 2003 semester were selected for the study. The methods of instruction employed for each course were traditional classroom lecture/discussion and distance learning formats of Internet, TeleCourse and TeleCourse Plus. Internet courses are delivered on-line, using Internet access and a browser, TeleCourse uses one-way videos or public broadcasting, and TeleCourse Plus is a hybrid between Internet and TeleCourse courses. Seven of the courses selected were part of the core curriculum approved by Texas Higher Education Coordinating Board (THECB) while four other courses were completely transferable. Two types of specific data were extracted: course data and individual student data. Course data included method of instruction, length of course, instructor's load, enrollment, number of withdrawals, and grade distribution. In addition, course requirements including the use of email, videos and Internet, orientation and testing on campus were added as variables. The student data included demographic variables such as age, gender, ethnicity, family status, employment and academic variables including number of ...
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Occupational therapy academic program faculty attitudes toward tenure as measured by the Tenure Attitude Scale

Occupational therapy academic program faculty attitudes toward tenure as measured by the Tenure Attitude Scale

Date: August 2002
Creator: Brown, Diane Peacock
Description: This study explored attitudes of occupational therapy faculty toward tenure and selected alternatives to tenure. A survey method was employed, and the Tenure Attitude Survey Instrument, (TASI), was created for use in the study. Additionally, a questionnaire sought information regarding respondents' rank, tenure and administrative status, institutional type, and years in academia. Participants were accredited occupational therapy professional program faculty who identified their primary work setting as "Academic" on the 2000-2001 American Occupational Therapy Association membership survey. Factor analysis of 577 surveys examined the structure of scores on the TASI, and the instrument consisted of 4 scales, and 18 items, as follows: Scale One: Attitude toward academic freedom and job security protection, 7 items; Scale Two: Attitude toward tenure in general, 6 items; Scale Three: Attitude toward stop-the-tenure clock provisions, 2 items; and Scale Four: Attitude toward post-tenure review, 3 items. Cronbach's alpha was conducted, as follows: TASI overall alpha = .7915; Scale 1 alpha = .7884; Scale 2 alpha = .8420; Scale 3 alpha = .7020; Scale 4 alpha = .4229. Proportional analysis showed that most respondents were full time faculty (88.1%); taught full time at public institutions (52.8%); were tenured or tenure-track (55.5%); had no administrative duties (70.5%); ...
Contributing Partner: UNT Libraries
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