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The Fate of Benzo(a)pyrene in Tissues of Mice Exposed to Diesel Exhaust

Description: Mice were exposed to diesel exhaust for 9 months prior to evaluation for benzo(a)pyrene disposition. On the last day of exposure the mice were instilled intratracheally with tritiated-benzo(a)pyrene ([3H]BP). The mice were sacrificed at intervals of 2, 24, and 168 hours. Disappearance of radioactivity from lungs and liver was rapid and essentially linear with time. In lungs, liver, and testes; [3H]BP metabolites were found mainly as conjugates, a form readily excretable. Clearance of the hydrocarbon from liver and testes in exposed mice was not markedly different from that in nonexposed mice. However, mice exposed to diesel exhaust had delayed [3H]BP clearance from lungs, possibly due to [3H]BP adsorption to diesel smoke particles.
Date: August 1981
Creator: Loudin, Agnes D.
Partner: UNT Libraries

Father Absence, Onset of Menarche, and Body Dissatisfaction: Importance of Father Absence

Description: Relationships between body dissatisfaction, dieting methods, father absence, and puberty timing were investigated in this study. Participants included adolescent females from Wave 1 of the National Longitudinal Survey of Adolescent Health. Logistic regression results indicated that girls without a biological father in the home were significantly more likely to have an early onset of puberty than on-time or late. Girls who experienced early puberty exhibited higher levels of body dissatisfaction, but didn't use more dieting methods. Early onset girls more likely used dieting methods if their biological father was present than absent; however, no significant difference in body dissatisfaction was shown. A negative relationship with fathers indicated more body dissatisfaction. None of the attained findings were found when the biological mother was absent, and having a stepfather did not seem to matter. Evidence was revealed that fathers play a role in their daughters' view of their own bodies.
Date: August 1999
Creator: Gartrell, Stacey R.
Partner: UNT Libraries

Fathers' and mothers' childcare ideas and paternal childcare participation.

Description: The relationship between fathers' and mothers' gender-role ideas and fathers' level of participation in general housework has been well documented. Data from a study in 1998 were used to explore specific aspects of this relationship. In particular, fathers' and mothers' genderrole ideas with regard to childcare (childcare ideas) was examined to see whether these ideas influence paternal childcare participation. Specifically, what impact they had on performance of childcare tasks and the time fathers spent with their children. The responses of 38 couples (76 individuals) were analyzed. No statistically significant relationships were found between the variables. The distribution of the data suggests that even though most fathers claimed to have nontraditional childcare ideas, most mothers still performed the great majority of childcare tasks.
Date: May 2001
Creator: Fletcher, Ryan G.
Partner: UNT Libraries

Fathom's Edge

Description: Investigating elements of the creative process in the work of three poets: James Wright, Gjertrud Schnackenberg, and Pegeen Kelly. Each poet deploys a different method for access to those experiences that lie at the edge of accessible language. Each method is discussed and its deployment illustrated. Wright leads us from the sensory world to the supersensual. Schnackenberg makes use of the formal device of the fairy tale. Kelly immerses in the logic of dreams. Drawing on Elaine Scarry's theory of the imagination, the case is made that the poetic act is a dialectic between the poet and the sensory world, in which perception and imagination are equally important.
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Date: May 2010
Creator: Sweeney, Mark
Partner: UNT Libraries

Fatigue and Recuperation Curves under Varying Lengths of Intertrial Recovery Periods

Description: The purposes of this study were to investigate the effect that strength level had upon fatigue and recuperation under the two conditions of five- and thirty-second interval duration periods. Another purpose was to compare the results of this study to similar studies using male subjects in order to determine if women's response patterns to tests of strength were similar to those of men.
Date: August 1968
Creator: Osborne, Jacquelyn
Partner: UNT Libraries

Fatigue Behavior of A356 Aluminum Alloy

Description: Metal fatigue is a recurring problem for metallurgists and materials engineers, especially in structural applications. It has been responsible for many disastrous accidents and tragedies in history. Understanding the micro-mechanisms during cyclic deformation and combating fatigue failure has remained a grand challenge. Environmental effects, like temperature or a corrosive medium, further worsen and complicate the problem. Ultimate design against fatigue must come from a materials perspective with a fundamental understanding of the interaction of microstructural features with dislocations, under the influence of stress, temperature, and other factors. This research endeavors to contribute to the current understanding of the fatigue failure mechanisms. Cast aluminum alloys are susceptible to fatigue failure due to the presence of defects in the microstructure like casting porosities, non-metallic inclusions, non-uniform distribution of secondary phases, etc. Friction stir processing (FSP), an emerging solid state processing technique, is an effective tool to refine and homogenize the cast microstructure of an alloy. In this work, the effect of FSP on the microstructure of an A356 cast aluminum alloy, and the resulting effect on its tensile and fatigue behavior have been studied. The main focus is on crack initiation and propagation mechanisms, and how stage I and stage II cracks interact with the different microstructural features. Three unique microstructural conditions have been tested for fatigue performance at room temperature, 150 °C and 200 °C. Detailed fractography has been performed using optical microscopy, scanning electron microscopy (SEM) and electron back scattered diffraction (EBSD). These tools have also been utilized to characterize microstructural aspects like grain size, eutectic silicon particle size and distribution. Cyclic deformation at low temperatures is very sensitive to the microstructural distribution in this alloy. The findings from the room temperature fatigue tests highlight the important role played by persistent slip bands (PSBs) in fatigue crack initiation. At room ...
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Date: May 2016
Creator: Nelaturu, Phalgun
Partner: UNT Libraries

Fatigue Related Changes in the Body Motion and Force Application During the Performance of Consecutive Chin-ups

Description: The purpose of this study was to examine the effects of fatigue on force application and resulting movement patterns during the performance of consecutive chin-ups. Special attention was directed toward relating any fatigue effects to upper limb strength dominance. Twenty male adult subjects each performed one trial. Each trial consisted of consecutive chin-ups. Fatigue caused changes in the movement patterns, duration of movement and force applied through the supporting hands. Throughout the performance greater vertical forces were applied through the dominant upper limb segment with the application of these forces resulting in horizontal displacement of the total body center of gravity toward the dominant hand.
Date: December 1984
Creator: Hong, Der-Ming
Partner: UNT Libraries

Faunal Exploitation during the Depopulation of the Mesa Verde Region (A. D. 1300): A Case Study of Goodman Point Pueblo (5MT604)

Description: This analysis of faunal remains from Goodman Point Pueblo (5MT604), a large village occupied just before the ancestral Puebloans permanently left southwestern Colorado at the end of the thirteenth century, explores the effect of dietary stress during abandonment in the Four Corners region. As archaeologists, we interpret what these former cultures were like and what resources they used through what they left behind. By specifically looking at faunal remains, or remains from food resources, environmental change and dietary stress can be assessed. Identifications of taxa identified at Goodman Point are made explicit via a systematic paleontology. This is followed by site-level taxonomic abundances and spatial analysis. Then, effects of technological innovations, environmental change, and sample quality are examined as alternate explanations of shifts in foraging efficiency, particularly related to animal hunting. Analyzing why and if the availability of faunal resources changes over time helps to clarify why the ancestral Puebloans left southwestern Colorado.
Date: August 2011
Creator: Hoffman, Amy Susan
Partner: UNT Libraries

Fear of Alzheimer's Disease in Middle to Late Adulthood: a Two Year Investigation of Change Versus Stability

Description: The term dementia refers to a progressive decline in cognitive functioning resulting in a significant impairment in daily living. Given the devastating impacts of the disease and lack of a cure, it is reasonable to expect people fear developing a dementia. Alzheimer's disease ranks high among the most feared diseases in national samples of the American population. As a topic of study, little is known about the determinants of fear of Alzheimer's disease and how this fear may change as a function of aging, time, or experience. The current study sought to fill this gap by investigating the nature of changes in fear of Alzheimer's disease by following participants (N = 227) over the course of two years. Volunteers completed measures on fear of dementia, knowledge about Alzheimer's disease, knowledge about the aging process, personality traits, memory self-efficacy, anxiety about aging, and Alzheimer's-related experiences (i.e., family history, caregiving experience, number of people known with the disease, personal diagnosis, etc.). Results supported the notion that fear for becoming a burden to others, a component of fear of dementia, decreased over the two years. In addition, personality traits and memory self-efficacy mediated the two-year change in concerns about perceived symptoms of cognitive decline. In predicting fear for various aspects of Alzheimer's disease, anxiety about aging and experience/exposure to the disease emerged as prominent predictors. These results highlight dementia concerns and offer guidance for early interventions, such as an open communication with family and health care providers about fear of dementia.
Date: August 2013
Creator: Page, Kyle S.
Partner: UNT Libraries

Fear of Failure and Fear of Success: The Relationship of Achievement Motives to the Motor Performance of Males and Females

Description: The study was designed to determine the relationship between the psychological constructs of "fear of failure (FOF)" and "fear of success (FOS)" and motor performance in badminton. Forty-three males and fifty-one females in beginning badminton classes were administered the FOF and FOS scales, followed by three independent skills tests and a round-robin singles tournament. Conclusions were that FOF and FOS are two separate performance motives; FOF appears to be the dominant motive for females; both FOF and FOS are related to motor performance in face-to-face competition, while only FOS is related to performance in isolated skills.
Date: December 1982
Creator: Albury, Kevin W.
Partner: UNT Libraries

Fearful to Friendly (F2F): a Constructional Fear Treatment for Domestic Cats Using a Negative Reinforcement Shaping Procedure in a Home Setting

Description: Feral and fearful cats and kittens in animal shelters are not likely to be adopted as companion animals because they emit fearful or aggressive behaviors in the presence of humans. The purpose of the fearful to friendly (F2F) research was to investigate a shaping procedure to increase friendly behaviors of feral and fearful domestic cats and kittens with the goal of achieving animal shelters’ adoptability criteria. The results showed the F2F procedure was a safe and very effective procedure to quickly tame feral kittens deemed unadoptable. The day after implementing F2F, three out of four kittens approached me and accepted petting and holding without any additional training.
Date: August 2012
Creator: Rentfro, Angela Drake
Partner: UNT Libraries

The Feasibility and Organizational Procedures for Establishing a Children's Theatre in the Fort Worth, Texas, Metropolitan Area

Description: This study seeks to determine the values of and the procedures for establishing a children's theatre activity in the Fort Worth, Texas, metropolitan area. This study has a twofold purpose. The first is to apply the values of children's theatre to children in the Fort Worth metropolitan area. The second purpose is to develop a feasible plan for organizing a workable theatre for children. Chapter II is a review of related literature and is divided into two parts. A history of the children's theatre movement in the United States was presented to substantiate general observations of the values of children's theatre. The final part of Chapter II presents several outstanding children's theatre groups and a brief synopsis of their organization. This is followed by specific organizational needs and suggestions. The final portion of this study presents a feasible organizational plan for the establishment of a children's theatre in this metropolitan area. The plan is flexible enough that other areas could adapt it to their own needs and desires.
Date: August 1974
Creator: Pennington, R. Boyce
Partner: UNT Libraries

Feasibility of a New Technique to Determine Dynamic Tensile Behavior of Brittle Materials

Description: Dynamic tensile characterization of geo-materials is critical to the modeling and design of protective structures that are often made of concrete. One of the most commonly used techniques currently associated with this type of testing is performed with a Kolsky bar and is known as the spall technique. The validity of the data from the spall technique is highly debated because the necessary boundary conditions for the experiment are not satisfied. By using a technique called pulse shaping, a new “controlled” spall technique was developed to satisfy all boundary conditions so that the analyzed data may be useful in modeling and design. The results from this project were promising and show the potential to revolutionize the way Kolsky bar testing is performed.
Date: May 2016
Creator: Dean, Andrew W
Partner: UNT Libraries

The Feasibility of Using an Adaptation of the Montessori Method to Teach Basic Nursing Skills to Beginning Generic Baccalaureate Nursing Students

Description: The purposes of this study are to determine the extent to which nursing education administrators accept the use of an adapted Montessori method in teaching basic nursing skills and to determine the feasibility of implementing such a method.
Date: August 1992
Creator: Paterniti, Anthony Peter
Partner: UNT Libraries

Feasibility Study of Consolidation by Direct Compaction and Friction Stir Processing of Commercially Pure Titanium Powder

Description: Commercially pure titanium can take up to six months to successfully manufacture a six-inch in diameter ingot in which can be shipped to be melted and shaped into other useful components. The applications to the corrosion-resistant, light weight, strong metal are endless, yet so is the manufacturing processing time. At a cost of around $80 per pound of certain grades of titanium powder, the everyday consumer cannot afford to use titanium in the many ways it is beneficial simply because the number of processing steps it takes to manufacture consumes too much time, energy, and labor. In this research, the steps it takes from the raw powder form to the final part are proposed to be reduced from 4-8 steps to only 2 steps utilizing a new technology that may even improve upon the titanium properties at the same time as it is reducing the number of steps of manufacture. The two-step procedure involves selecting a cylindrical or rectangular die and punch to compress a small amount of commercially pure titanium to a strong-enough compact for transportation to the friction stir welder to be consolidated. Friction stir welding invented in 1991 in the United Kingdom uses a tool, similar to a drill bit, to approach a sample and gradually plunge into the material at a certain rotation rate of between 100 to 2,100 RPM. In the second step, the friction stir welder is used to process the titanium powder held in a tight holder to consolidate into a harder titanium form. The resulting samples are cut to expose the cross section and then grinded, polished, and cleaned to be observed and tested using scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), and a Vickers microhardness tester. The results were that the thicker the sample, the harder the resulting consolidated sample ...
Date: August 2016
Creator: Nichols, Leannah Marie
Partner: UNT Libraries

The Fecundity of the Bluegill (Lepomis Macrochirus) in Certain Small East Texas Reservoirs

Description: A study of reproduction and spawning habits of the bluegill in a particular lake must include adequate samples for each period of the year. This will make it possible to determine the number of eggs in each spawn and the frequency of spawning. The number of spawns and average egg production for various sized fish shows the pattern of activity and makes possible further basic research.
Date: 1949
Creator: Estes, Charles M.
Partner: UNT Libraries

Federal Aid to Education

Description: This thesis measures the degree to which the Federal Government has assisted formal education for children in the united States.
Date: August 1938
Creator: Wood, Andrew J.
Partner: UNT Libraries

The Federal Constitution and Race-Based Admissions Policies in Public Charter Schools

Description: The primary questions addressed in this dissertation are whether race-based admissions policies in charter schools are constitutionally permissible, and if not, how could an admissions policy be designed so that it would promote school diversity without violating the law? These questions are important because there are significant numbers of philosophers and scholars who hypothesize that student body diversity not only enhances educational outcomes but also is a necessary component of civic education in a liberal democracy. The researcher takes no particular stance on the benefits of educational diversity, focusing instead on the constitutional questions raised by the use of race-sensitive policies in the interest of diversity. The primary methodology used throughout is legal research, though the literature review includes references to political philosophers and social scientists as well as primary legal sources. Chapter I outlines the most frequent arguments made in favor of school diversity and suggests that the judicial philosophy expressed by the Supreme Court over the last twenty-five years has moved away from the philosophy expressed in Brown v. Board. In Chapter II, Supreme Court precedent on affirmative action policies is analyzed, focusing mainly on the decision of the divided Court in University of California Board of Regents v. Bakke. Chapter III provides a detailed analysis of how six different Federal Circuit Courts interpreted Bakke, highlighting numerous recurring judicial themes and concerns. In Chapter IV, existing charter school laws are examined state by state. Chapter V suggests several policy options for those interested in promoting a diverse charter school student body.
Date: May 2002
Creator: Black, Watt Lesley
Partner: UNT Libraries

Federal Funds Target Rate Surprise and Equity Duration

Description: In this paper I use an equity duration framework to develop and empirically test the hypothesis that returns on growth stock portfolios react more strongly to Federal Funds target rate change announcements, as compared to value stock portfolios. When I decompose the Federal Funds rate change, I find that portfolio returns are only sensitive to rate shocks, as opposed to the predictable component of rate change. Since growth stocks are expected to have higher duration than value stocks, I further explore the well documented polarity between value and growth stocks, by examining the interest rate sensitivities of portfolios that diverge along four fundamental-to-prices ratios: dividend yield, book-to-market value, earnings-to-price and cashflows-to-price. In each case, I find that price reactions are more pronounced for portfolios with high growth characteristics. I also document that portfolio returns react asymmetrically to positive and negative target rate surprises, and that this reaction is conditional on the state of business cycles - periods of economic expansions and recessions. To improve the robustness of my results, several statistical applications have been applied. First, I include Newey-west estimators to examine significant levels of regression estimates. Second, I check if there is any contemporaneous correlation across target rate shocks by applying ARIMA tests, and to overcome the problem resulted from serial correlation of target rate shocks, I substitute white noise residuals from the regressions on the rate shocks for target rate shocks to be new exogenous variables.
Date: May 2013
Creator: Tee, Kienpin
Partner: UNT Libraries

The Federal Independent Regulatory Commissions: Some Recent Criticisms and Recommendations

Description: It is the purpose of this thesis to point out areas of failure and weaknesses in the Federal independent regulatory commissions, and recommendations for improvement, as seen by Louis J. Hector, James M. Landis, Emmette S. Redford, Bernard Schwartz and the Special Subcommittee on Legislative Oversight. A secondary purpose of the study is to present action taken by Congress and President Kennedy in response to recent criticisms of the commissions. The scope of the thesis is limited to the major problems of policy-making, personnel matters, and efficiency of the major independent regulatory commissions. The material presented in the thesis covers five chapters. Chapter I includes a general introductory statement, the purpose and scope of the study, and the method of organization. Chapter II is a presentation of the criticisms and recommendations of Hector, Redford, and Landis in respect to the problems of policy-making and coordination faced by the independent commissions. Chapter III examines the problems of commission personnel in respect to qualifications, turnover, and ethical conduct. Chapter IV concerns the efficiency of the independent commissions, showing examples of delay and incompetence in the performance of the functions of the CAB, the FPC, and other commissions. Criticisms and recommendations include those of Hector, the Special Subcommittee, and Landis. Chapter V, the conclusion, re-emphasizes the importance of the problems facing the commissions. Attention is given to action taken by Congress and President Kennedy to improve the efficiency of certain commissions. An analysis of the criticisms and recommendations of the sources used is presented.
Date: August 1964
Creator: Marsh, Fred L.
Partner: UNT Libraries