UNT Theses and Dissertations - 14 Matching Results

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Expulsion of Carriers from the Double-Barrier Quantum Well and Investigation of Its Spectral and Transport Consequences

Description: 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
Partner: UNT Libraries

The Relationship of Adult Attachment Styles to Working Models and Behaviors in Marriage

Description: The relationship between adult attachment style and romantic relationship quality in marriage relationships was explored. Romantic relationship quality was measured at the working model (or perceptual) and the behavioral levels. No previous research had investigated romantic relationship quality as reflecting specific attachment related perceptions of self and spouse or as attachment related behaviors. Two hundred and six married subjects were recruited from university campuses, churches, and on an individual basis. Most of the subjects were white, middle class, and had children. Subjects completed self-report questionnaires measuring adult attachment style, working model of self and romantic partner, and reports of relationship behaviors of self and romantic partner. The first hypothesis proposed that attachment style differences would be seen in specific attachment related working models of self and romantic partner. The second hypothesis proposed that attachment style differences would be seen in reports of attachment related behaviors for self and romantic partner. Hypotheses were tested using multivariate analysis of variance.
Date: March 1994
Creator: Creath, Maxine Kay
Partner: UNT Libraries

Perceptions of the Sudanese Professional Working in Saudi Arabia on Migration and Economic Development of the Sudan

Description: 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 cost of living in the Sudan, (b) low salary, (c) money shortage, (d) high cost of housing, (e) little opportunity for advancement, and (f) shortage of basic necessities. It is realized that migration has costs and benefits for the Sudan. Government policies should be directed to maximize the benefits and minimize the costs. It is recommended that the government should adopt policies to regulate migration and assure the Sudanese expatriates of the efficient execution of these policies, attract their remittances through exemption and facilities, and work toward eliminating or reducing the causes of migration.
Date: March 1990
Creator: Hamid, Adil A. (Adil Abdelaziz)
Partner: UNT Libraries

The Effect of N, N Bis (ethylene)-P (1-adamantyl) Phosphonic Diamide on Rous Sarcoma Virus

Description: The drug, N,N bis (ethylene)-P (1-adamantyl) phosphonic diamide inhibits focus formation of Rous Sarcoma Virus in tissue culture. Transformation of chick cells was inhibited when the drug was added to chick cells prior to infection. The drug did not inhibit the transformation of Normal Rat Kidney Cells infected with RSV, when the cells were grown at non-permissive temperatures and shifted to permissive temperatures upon addition of the drug. Nor did the drug revert cells transformed at permissive temperatures. These studies indicated that the inhibition of RSV is in the early stage of viral growth, possible penetration or uncoating.
Date: March 1988
Creator: McGraw, Thomas L. (Thomas Lee)
Partner: UNT Libraries

Prospective Memory and College Students: Validation of the Wood Prospective Memory Test

Description: This study provides information regarding the validity and reliability of the Wood Prospective Meory Test (WPMT), a newly developed test consisting of three main subscales intended to measure prospective memory. Subjects were 69 college students (50 female, 19 male, age range 18-24), who were administered several memory tasks including the WPMT.The results of this study suggest that the subscales of the WPMT do not have sufficient internal reliability (.50, .60, and .44), and therefore, would be unlikely to correlate highly with any other measures. The usefulness of the WPMT as a clinical instrument is discussed.
Date: March 1992
Creator: Rowe, Christina J.
Partner: UNT Libraries

The Influence of Psychological Stress and Personality upon Athletic Performance of Intercollegiate Tennis Players

Description: This investigation was designed to study coach and self-appraised groupings of intercollegiate tennis players who yield to stress and withstand stress and to determine if personality differences existed between groups. Subjects were 75 intercollegiate tennis players from Texas. A stress inventory and the Cattell Sixteen Personality Factor Questionnaire were instruments utilized in the study. Data were subjected to hierarchical profile-groupings, three-way analyses of variance, and a correlational analysis. Conclusions of the study were that intercollegiate tennis players and male and female players respond to stress differently; intercollegiate tennis players and male and female players who experience different levels of stress have different personalities; and players and coaches do not evaluate the ability to cope with stress similarly.
Date: March 1978
Creator: Reed, Rebecca Lee
Partner: UNT Libraries

Rheumatoid Arthritis: A Follow-Up Assessment of Physical Functioning Abilities After Treatment in a Comprehensive Environmental Control Unit

Description: Two instruments were developed and administered to fifteen female and three male rheumatoid arthritics (mean age 44) previously hospitalized for allergy treatment by ecological methods. The Physical Functioning Ability Scale assessed functional capacity according to common daily activities, and the Rehabilitation Questionnaire surveyed adjustment problems subjects encountered after hospital discharge. ANOVA was performed on the functionality scale comparing dimensions of dependence, pain, and difficulty with categorical activities of mobility, work, and personal care, Significant F values (p(.05) were obtained for interaction and dimensions, but not for categories. Functional independence from human/mechanical assistance was particularly noted. Recommendation for future research concerns replicating this study using a control group of rheumatoid arthritics treated by traditional medical approaches.
Date: March 1981
Creator: Cockburn, Orbie
Partner: UNT Libraries

A Preliminary Study of the Systemic Problems Underlying U.S.-East European Trade Relations

Description: This study hypothesizes that the major barriers to expanded trade between the U.S. and Eastern Europe are systemic in nature. Using this approach, each political/ economic system is examined in an attempt to define the obstacles to foreign trade expansion, to describe the most important systemic and political factors at work, and to demonstrate how they have determined and will continue to shape the economic relationships between the U.S. and the countries of Eastern Europe. A final synthesis presents the two systems in a unified picture of the economic environment and concludes that significant trade expansion is unlikely in the near future due to basic systemic incompatibilities which impede the resolution of key foreign trade problems.
Date: March 1981
Creator: Abbott, Karen L.
Partner: UNT Libraries

The Causes of Revolution: A Case Study of Iranian Revolution of 1978-79

Description: This study investigates the causes of the Iranian revolution of 1978-79. To this end, the different theories of revolution are reviewed in Chapter One. Chapter Two provides a discussion of the historical background of the country and the role the clergy played in shaping its political development. Socioeconomic and political factors which contributed to the outbreak of this revolution are examined in the following two chapters. Finally, an attempt is made to draw some conclusions on whether existing theories of revolution can fully explain the Iranian upheaval of 1978-79 or not. For the preparation of this study United States government documents and Iranian and English language scholarly works were consulted.
Date: March 1982
Creator: Tehrani, Mohammad Hassan Tajalli
Partner: UNT Libraries