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Thermal, Electrical, and Structural Analysis of Graphite Foam

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A graphite foam was developed at Oak Ridge National Laboratory (ORNL) by Dr. James Klett and license was granted to POCO Graphite, Inc. to manufacture and market the product as PocoFoam™. Unlike many processes currently used to manufacture carbon foams, this process yields a highly graphitic structure and overcomes many limitations, such as oxidation stabilization, that are routinely encountered in the development of carbon foam materials. The structure, thermal properties, electrical resistivity, isotropy, and density uniformity of PocoFoam™ were evaluated. These properties and characteristics of PocoFoam™ are compared with natural and synthetic graphite in order to show that, albeit similar, it is unique. Thermal diffusivity and thermal conductivity were derived from Fourier's energy equation. It was determined that PocoFoam™ has the equivalent thermal conductivity of metals routinely used as heat sinks and that thermal diffusivity is as much as four times greater than pure copper and pure aluminum. SEM and XRD results indicate that PocoFoam™ has a high degree of crystalline alignment and near theoretical d spacing that is more typical of natural flake graphite than synthetic graphite. PocoFoam™ is anisotropic, indicating an isotropy factor of 0.5, and may yield higher thermal conductivity at cryogenic temperatures than is observed in …
Date: August 2001
Creator: Morgan, Dwayne Russell
Object Type: Thesis or Dissertation
System: The UNT Digital Library

The Pettis Integral and Operator Theory

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Let (Ω, Σ, µ) be a finite measure space and X, a Banach space with continuous dual X*. A scalarly measurable function f: Ω→X is Dunford integrable if for each x* X*, x*f L1(µ). Define the operator Tf. X* → L1(µ) by T(x*) = x*f. Then f is Pettis integrable if and only if this operator is weak*-to-weak continuous. This paper begins with an overview of this function. Work by Robert Huff and Gunnar Stefansson on the operator Tf motivates much of this paper. Conditions that make Tf weak*-to-weak continuous are generalized to weak*-to­weak continuous operators on dual spaces. For instance, if Tf is weakly compact and if there exists a separable subspace D X such that for each x* X*, x*f = x*fχDµ-a.e, then f is Pettis integrable. This nation is generalized to bounded operators T: X* → Y. To say that T is determined by D means that if x*| D = 0, then T (x*) = 0. Determining subspaces are used to help prove certain facts about operators on dual spaces. Attention is given to finding determining subspaces far a given T: X* → Y. The kernel of T and the adjoint T* of T are used …
Date: August 2001
Creator: Huettenmueller, Rhonda
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Submerged wood inhabiting macoinvertebrates of the Elm Fork of the Trinity River, Texas: Assemblage analyses, comparisons to the benthic fauna, and a study of Cyrnellus fraternus (Trichoptera: Polycentropodidae)

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Taxonomic composition and spatio-temporal variability of macroinvertebrates inhabiting snags were examined from an 8-km segment of the Elm Fork of the Trinity River. Seventy-seven macroinvertebrate taxa were collected from submerged wood during the study. Assemblages were highly variable spatially and temporally, especially among seasons. An ordination of species and environment did not find snag taxa to have striking correlations with many of the selected environmental variables, although there were some trends in flow-mediated species distributions. There were significant seasonal differences in the abundances of some taxa, particularly among the Chironomidae (Diptera). The Tribe Orthocladiini was numerically abundant during the winter, while the Tribes Chironomini and Tanytarsini dominated the summer and autumn. Additionally, this study included a secondary production and microdistribution analysis of a population of the caddisfly Cyrnellus fraternus. Distributions of C. fraternus were restricted to snags, the most stable substratum for retreat building and for resisting periodic high waters. Larvae were not found in the soft sand and mud benthic habitats near submerged wood. The insects were multivoltine with a minimum of three generations per year. Pupae were collected July through September and adults emerged from May through October. The population overwintered as larvae. Estimated annual production was 1,015.4 …
Date: August 2001
Creator: Johnson, Zane B.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Comparison of GPS Point Selection Methods for GIS Area Measurement of Small Jurisdictional Wetlands

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U.S. Army Corps of Engineers (USACE) regulates fill of jurisdictional waters of the United States including wetlands. Recent USACE regulations set a threshold of impacts to wetlands at one-half acre. Impact area can be determined by Global Positioning System (GPS) measurement of wetland boundary and Geographic Information System (GIS) calculation of impact area. GPS point selection methods include (1) equal time interval, (2) transect and (3) intuition. Four two-acre shapes were measured with each GPS method and brought into GIS for area calculation. Analysis of variance and Root Mean Square Error analyses determine that the transect method is an inferior point selection method in terms of accuracy and efficiency.
Date: August 2001
Creator: Shelton, Michael
Object Type: Thesis or Dissertation
System: The UNT Digital Library

A study of freshman interest groups and leadership practices at Texas Woman's University

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This study investigated the level of leadership practices and retention rates of freshman students at Texas Woman's University. The data for the study were collected using the Leadership Practices Inventory, Student Version. The sample for the study consisted of 151 freshman students. The students were each placed in one of three control groups. Group A students (the treatment group) were in the Neighbors Educated Together Program (NET). Group B students (control group) were in one of two university-sponsored programs (COLORS or University 1000), and Group C students (control group) were the residual group of first-time college freshmen. These three groups were surveyed prior to their participation in the NET program or a university-sponsored program and again at the end of 14 weeks. In addition, retention rates were examined on the 12 class day of the spring semester. The study found statistically significant differences (p <. 05) on the pretests and posttests between Group C, residual students, and the other two groups on the Enabling the Followers to Act subscale, the Inspiring a Shared Vision subscale, and Encouraging the Heart subscale. Group A, NET students, and Group B, COLORS/University 1000 students, showed no statistically significant differences between groups. The difference from …
Date: August 2001
Creator: Mendez-Grant, Monica S
Object Type: Thesis or Dissertation
System: The UNT Digital Library

The Symbolic Representation of Latinos: A Content Analysis of Prime-Time Television

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The media are powerful agents of socialization in modern society influencing values, beliefs, and attitudes of the culture that produces them. Both the quantity and quality of Latino images in the media may reflect and reinforce the place of Latinos in United States society. This study examines how Latinos are portrayed in television entertainment programming by addressing two major research questions: 1) What is the extent of Latino recognition on prime-time television? and 2) What is the extent of respect accorded Latinos on prime-time television? A one-week sample of prime-time television programming airing on three networks yielded 47 programs and 807 characters for analysis. Using content analysis methodology, recognition is identified by examining the frequency and proportional representation of Latino television portrayals and respect is measured by examining the types and significance of these roles. The results indicate an overall lack of diversity on prime-time television with only 11 of the 47 programs analyzed reaching 50% or more of the maximum possible diversity in their racial and ethnic portrayals. Specifically, Latinos represent only 3% of primetime television characters, less than one-fourth of their proportion of the nation's population. Compared to non-Hispanic Whites, Blacks, and Asians, Latinos are the group least …
Date: August 2001
Creator: McKenzie-Elliott, Tracey M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Five Seasons: A composition for flutist and percussionist

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Five Seasons is a musical work for flute and percussion. The flutist alternately performs on the C flute with a B foot, alto flute, piccolo, and bass flute in each movement. The percussionist also plays different instruments in each movement: the vibraphone for Mid-Summer; the xylophone for Fall; the woodblock, temple block, and cowbells for Spring; the glockenspiel for Summer; and the marimba for Winter. The five movements of this work - Mid-Summer, Fall, Spring, Summer, and Winter - are based on a combination of Eastern performing practices with Western instruments. The musical characteristics are based on the techniques of fifteenth-century (e.g., isorhythmic technique) and twentieth-century Western music.
Date: August 2001
Creator: Kim, Chol-Ho
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Home: A Memoir

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Home: A Memoir, a creative non-fiction thesis, is a memoir in the form of personal essays, each exploring some aspect of the meaning of home, how my sense of self has been formed by my relationship to home, and the inevitability of leaving home. Chapter I explores the nature of memory and of memoir, their relationship to each other and to truth, and how a writer's voice shapes memoir. Chapter II, “Paternity,” is an attempt to remember my father, resulting in renewed interest in his past and renewed awareness of his legacy. Chapter III, “Home,” is on the surface about my grandparents' house, but is really about my grandmother. Chapter IV, “Dixie,” is about my contradictory feelings for the South, and my eventual acceptance of the South's complexities.
Date: August 2001
Creator: Lovell, Bonnie Alice
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A survey of the Greater Dallas Crime Commission and its effect on the (open access)

A survey of the Greater Dallas Crime Commission and its effect on the

This thesis examines the history of the Greater Dallas Crime Commission and its effectiveness within the criminal justice system. It is a private agency established fifty (50) years ago to monitor and investigate the criminal justice system. Today, it serves as a source of funding for criminal justice agencies, provides awards and recognition forums for law enforcement and lobbies for legal revisions of the criminal code. The research is designed to examine their role within the criminal justice system. Whether current crime theories are supported by the commission is central to the thesis. There are no prior studies available of crime commissions perhaps because they are privately funded and operated by civilians. Crime commissions do exert influence, politically and financially, upon law enforcement. It is reflected often in their history. The extent of this effect is the subject of the paper. To this end, the commission's role in changing state laws, providing funds for police training, recognizing prosecutors and paying awards to informants lends credibility to their role in the criminal justice system. Their function has often changed during the fifty-year history. If there is a deficit, it may be that the commission has the capability, through its sphere of …
Date: May 2001
Creator: Latham, H. Lee
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Anne Brontë's New Women: Agnes Grey and The Tenant of Wildfell Hall as Precursors of New Woman Fiction

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Anne Brontë's Agnes Grey and The Tenant of Wildfell Hall were published more than forty years before the appearance of the feminist type that the Victorians called the “New Woman;” yet, both novels contain characteristics of New Woman fiction. By considering how Brontë's novels foreshadow New Woman fiction, the reader of these novels can re-enact the “gentlest” Brontë as an influential feminist whose ideology informed the construction of the radical New Woman. Brontë, like the New Woman writers, incorporated autobiographical dilemmas into her fiction. By using her own experiences as a governess, Brontë constructs Agnes Grey's incongruent social status and a morally corrupt gentry and aristocracy through her depiction of not only Agnes's second employers, the Murrays, but also the morally debauched world that Helen enters upon her marriage to Arthur Huntingdon in The Tenant of Wildfell Hall. Moreover, Brontë incorporates her observations of Branwell's alcoholism and her own religious beliefs into The Tenant of Wildfell Hall. Although Brontë's novels contain autobiographical material, her heroines are fictional constructions that she uses to engage her readers with the woman question. Brontë accomplishes this engagement through her heroines' narrative re-enactments of fictional autobiographical dilemmas. Helen's diary and Agnes's diary-based narrative produce the …
Date: August 2001
Creator: Phillips, Jennifer K.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Novel Mechanism for Site-Directed Mutagenesis of Large Catabolic Plasmids Using Natural Transformation (open access)

A Novel Mechanism for Site-Directed Mutagenesis of Large Catabolic Plasmids Using Natural Transformation

Natural transformation is the process by which cells take up DNA from the surrounding medium under physiological conditions, altering the genotype in a heritable fashion. This occurs without chemical or physical treatment of the cells. Certain Acinetobacter strains exhibit a strong tendency to incorporate homologous DNA into their chromosomes by natural transformation. Transformation in Acinetobacter exhibits several unique properties that indicate this system's superiority as a model for transformation studies or studies which benefit from the use of transformation as an experimental method of gene manipulation. Pseudomonas putida is the natural host of TOL plasmids, ranging between 50 kbp and 300 kbp in size and encoding genes for the catabolism of toluene, meta-toluate, and xylene. These very large, single-copy plasmids are difficult to isolate, manipulate, or modify in vitro. In this study, the TOL plasmid pDKR1 was introduced into Acinetobacter calcoaceticus strains and genetically engineered utilizing natural transformation as part of the process. Following engineering by transformation, the recombinant DNA molecule was returned to the native genetic background of the original host P. putida strain. Specific parameters for the successful manipulation of large plasmids by natural transformation in Acinetobacter were identified and are outlined. The effects of growth phase, total …
Date: August 2001
Creator: Williamson, Phillip C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Masculine Gender Role Conflict and Psychological Well- Being: A Comparative Study of Heterosexual and Gay Men (open access)

Masculine Gender Role Conflict and Psychological Well- Being: A Comparative Study of Heterosexual and Gay Men

Masculine gender role conflict (MGRC) occurs when externally-imposed male gender role expectations have a negative impact on and consequences for men. The purpose of this study was to examine how men in a homogeneous setting (i.e., a college campus) compare on MGRC and psychological well-being, based on their self-identified sexual orientation. Utilizing canonical correlation analysis, 96 heterosexual men and 102 gay men were compared on four factors of MGRC (conflict between work and family, restrictive emotionality, restrictive affectionate behavior between men, and success, power, and competition) and five factors of psychological well-being (anger, anxiety, depression, self-esteem, and attitudes toward seeking psychological help). Findings for the heterosexual men were highly consistent with previous studies on MGRC and psychological well-being in a college-age population. Findings for the gay men indicated they had more problems with MGRC and psychological well-being than college-age and older gay men surveyed in the one published study on gay men and MGRC. Gay men who were single also reported more problems with restrictive emotionality, anger, anxiety, and depression, and had lower self-esteem, than gay men who were in a relationship. Between group differences were few, with gay men reporting significantly less restrictive affectionate behavior between men than heterosexual …
Date: August 2001
Creator: Shepard, William D.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Language Policy, Protest and Rebellion (open access)

Language Policy, Protest and Rebellion

The hypothesis that language discrimination contributes to protest and/or rebellion is tested. Constitutional language policy regarding administrative/judicial, educational and other matters is measured on three separate scales developed for this study; the status of each minority group's language under its country's policy is measured by another set of scales. Protest and rebellion variables are taken from Gurr's Minorities at Risk study. Findings include an indication that group language status contributes positively to protest and rebellion until a language attains moderate recognition by the government, at which point status develops a negative relationship with protest and rebellion, and an indication that countries with wider internal variations in their treatment of language groups experience higher levels of protest and rebellion on the part of minority groups.
Date: May 2001
Creator: Lunsford, Sharon
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Isolation and analysis of cotton genomic clones encompassing a fatty acid desaturase (FAD2) gene (open access)

Isolation and analysis of cotton genomic clones encompassing a fatty acid desaturase (FAD2) gene

Polyunsaturated fatty acids are major structural components of plant chloroplast and endoplasmic reticulum membranes. Two fatty acid desaturases (designated FAD2 and FAD3) desaturate 75% of the fatty acids in the endoplasmic reticulum. The w -6 fatty acid desaturase (FAD2) may be responsible for cold acclimation response, since polyunsaturated phospholipids are important in helping maintain plant viability at lowered temperatures. To study regulation of FAD2 gene expression in cotton, a FAD2 gene was isolated from two genomic libraries using an Arabidopsis FAD2 hybridization probe and a cotton FAD2 5¢ -flanking region gene-specific probe, respectively. A cotton FAD2 gene was found to be in two overlapping genomic clones by physical mapping and DNA sequencing. The cloned DNA fragments are identical in size to cotton FAD2 genomic DNA fragments shown by genomic blot hybridization. The cotton FAD2 coding region has 1,155 bp with no introns and would encode a putative polypeptide of 384 amino acids. The cotton FAD2 enzyme has a high identity of 75% with other plant FAD2 enzymes. The enzyme has three histidine-rich motifs that are conserved in all plant membrane desaturases. These histidine boxes may be the iron-binding domains for reduction of oxygen during desaturation. To confirm that this FAD2 …
Date: May 2001
Creator: Kongcharoensuntorn, Wisatre
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Hardiness, stress, and coping strategies among mid-level nurse managers: Implications for continuing higher education. (open access)

Hardiness, stress, and coping strategies among mid-level nurse managers: Implications for continuing higher education.

This study investigated relationships among hardiness, stress, and coping strategies among mid-level nurse managers in hospitals. Coping strategies were hypothesized to be positively related to stress. In addition, hardiness and its components were hypothesized to be positively related to stress and coping strategies. Demographics were hypothesized to be unrelated to stress, hardiness, and coping strategies. Both hardiness and coping strategies were hypothesized to be predictors of stress. Pearson correlation coefficients, multiple regression, and linear regression were used in data analysis. Stress was associated with specific coping strategies viz., confrontation, selfcontrolling, accepting responsibility, and escape-avoidance. High hardiness, particularly commitment and challenge, was associated with low levels of stress and with problemfocused coping strategies. By contrast, low hardiness was associated with high stress and use of emotion-focused strategies. Significant demographics, when compared to study variables, included age, experience, time with supervisors, number of direct reports, highest degrees obtained, and formal or informal higher education in management. Young nurse managers who were less experienced in nursing and management, and who had fewer direct reports, reported the highest stress levels among nurse managers. High hardiness, particularly commitment, was a strong predictor of low levels of stress; use of escape-avoidance was a significant predictor of …
Date: May 2001
Creator: Judkins, Sharon Kay
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Virtual Teams and Technology: The Relationship between Training and Team Effectiveness (open access)

Virtual Teams and Technology: The Relationship between Training and Team Effectiveness

The impact of training on virtual team effectiveness was assessed in five areas: communication, planning tasks and setting goals, solving problems and making decisions, resolving conflict, and responding to customer requirements. A 12-page survey was developed exploring all aspects of virtual teams. 180 surveys were distributed, 52 were returned representing 43 companies. Training led to higher effectiveness in planning tasks and setting goals, solving problems and making decisions, and conflict resolution, but not in communication and responding to customer requirements. Training may not solve all the problems that virtual teams will encounter; however, training will make the challenges easier to handle.
Date: May 2001
Creator: Andrews, Angelique
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Memory Management and Garbage Collection Algorithms for Java-Based Prolog

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Implementing a Prolog Runtime System in a language like Java which provides its own automatic memory management and safety features such as built--in index checking and array initialization requires a consistent approach to memory management based on a simple ultimate goal: minimizing total memory management time and extra space involved. The total memory management time for Jinni is made up of garbage collection time both for Java and Jinni itself. Extra space is usually requested at Jinni's garbage collection. This goal motivates us to find a simple and practical garbage collection algorithm and implementation for our Prolog engine. In this thesis we survey various algorithms already proposed and offer our own contribution to the study of garbage collection by improvements and optimizations for some classic algorithms. We implemented these algorithms based on the dynamic array algorithm for an all--dynamic Prolog engine (JINNI 2000). The comparisons of our implementations versus the originally proposed algorithm allow us to draw informative conclusions on their theoretical complexity model and their empirical effectiveness.
Date: August 2001
Creator: Zhou, Qinan
Object Type: Thesis or Dissertation
System: The UNT Digital Library

A Case Study of Leftist Terrorism in Turkey

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Change in government has characterized the development of most nations. Sometimes this change has been marked by continued evolution, in a peaceful attempt to move forward. Other times, change has been fraught with violent revolution and terrorism. This process has been the subject of much debate by political scientists and economic philosophers. Today, Turkey suffers from continued threats to its government through violent acts of terrorism conducted by various groups, expressing ideologies of leftist and rightist organizations, as well as ethnic and religious extremists. This thesis examines DHKP/C as the primary leftist revolutionary group effecting Turkey, exploring its historical background in Europe and the Middle East, as well as its philosophical link to Marxism. Further, this treatise discusses the implication of revolution and terrorism expressed by DHKP/C; and explores innovative and peaceful solutions, strategies, and techniques to be used by the police forces of Turkey in combating this group
Date: August 2001
Creator: Yayla, Ahmet
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Minding the Store: A Memoir

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Personal memoir of Stanley Marcus providing anecdotes about his life and family, and also describing his role in the Neiman Marcus department store chain, which was founded by Herbert Marcus (Stanley's father) with his younger sister and her husband, Carrie and Al Neiman. Index starts on page 373.
Date: August 15, 2001
Creator: Marcus, Stanley, 1905-2002
Object Type: Book
System: The UNT Digital Library

The Bridges of Vietnam: From the Journals of U. S. Marine Intelligence Officer

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As an intelligence officer during the Vietnam War, Fred L. Edwards, Jr., was instructed to visit every major ground unit in the country to search for intelligence sources—long range patrols, boats, electronic surveillance, and agent operations. “Edwards found time to keep a journal, an extremely well-written, sharply observed report of his adventures. Along with contemporary postscripts and a helpful historical chronology, that journal is a significant improvement on most Vietnam memoirs. It is the record of a Marine’s on-the-job education.”—Proceedings
Date: May 15, 2001
Creator: Edwards, Fred L., Jr.
Object Type: Book
System: The UNT Digital Library

AS 01-7

None
Date: 2001
Creator: Falsetta, Vincent
Object Type: Artwork
System: The UNT Digital Library

The Texas Cookbook: From Barbecue to Banquet--an Informal View of Dining and Entertaining the Texas Way

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This delightful collection captures the flavor and diversity of the cuisine of the Lone Star State. The Texas Cookbook presents recipes ranging from down-home cooking to high-class affairs, from regional favorites to ethnic specialties. Mary Faulk Koock traveled throughout Texas gathering recipes from ranch kitchens and city hostesses. Scattered among these are the author’s anecdotes from her vast and varied encounters with the famous and influential. In Austin John Henry Faulk, the author’s brother, savors Quail Pie with J. Frank Dobie, Walter Prescott, Roy Bedichek, and Mody Boatright. Fort Worth’s Van Cliburn enjoys the hostess’ biscuits and offers his own recipe for a whole-wheat variety. Here is Lady Bird Johnson’s Peach Ice Cream (the LBJ Ranch) and some expected classics such as Lee’s Chili (Amarillo), Venison Roast (the King Ranch), and Black-eyed Peas with Okra (Austin). But you will also find the unusual in Roasted Wild Turkey (the Hill Country), Fried Apricot Pies (Fredericksburg), and Watermelon Rind Preserves (Luling). Regional contributions shine in Sauerbraten (Kerrville), Salsa Brava (Brownsville) and Crawfish Etouffee (Beaumont). At the home of friends in Dallas Koock reveals the recipe for Chicken Cannelloni served after an opera. We share in her delight with Persimmon Salad in San …
Date: August 15, 2001
Creator: Koock, Mary Faulk
Object Type: Book
System: The UNT Digital Library

AT 01-8, AV 01-10, AU 01-9, BI 02-8, BJ 02-9, BS 03-7

None
Date: 2001/2003
Creator: Falsetta, Vincent
Object Type: Artwork
System: The UNT Digital Library

AZ 01-14

This abstract painting is predominately white with green, pink and gray vertical strokes broken by an implied horizontal line.
Date: 2001
Creator: Falsetta, Vincent
Object Type: Artwork
System: The UNT Digital Library