Digital Commons Network^™

Strain Control Of Piezoelectric Materials Using An Applied Electron Flux, Philip Clark Hadinata

University of Kentucky Doctoral Dissertations

This dissertation examines the response of piezoelectric material strain to electron flux influence. A plate of PZT5h is prepared as the specimen. The positive electrode is removed, and the negative electrode is connected to a power amplifier. Sixteen strain gages are attached as the strain sensor. The specimen is placed in a vacuum chamber, then the positive side is illuminated by electron beam. The characteristic of the static strain response is predicted by deriving the equation strain/deflection of the plate. Two methods are used, the Electro-Mechanical Equations and numerical analysis using Finite Element Method. The settings of the electron gun …

How Do The Structures Of The Late Paleozoic Ouachita Thrust Belt Relate To The Structures Of The Southern Oklahoma Aulacogen, Steven John Jusczuk

University of Kentucky Doctoral Dissertations

The thin-skinned structures of the late Paleozoic Ouachita thrust belt intersect the basement structures of the Southern Oklahoma aulacogen beneath the Mesozoic strata of the Gulf Coastal Plain in southeastern Oklahoma. The Ouachita thrust belt forms a large northwest-directed salient which extends primarily in the subsurface from central Mississippi northwestward to Arkansas and eastern Oklahoma, and from there, southwestward toward central Texas. Kinematics are complicated in the center of the Ouachita salient, where the average southwesterly strike of thrust faults is nearly perpendicular to average trend of compressional basement structures in the Southern Oklahoma aulacogen (Arbuckle uplift) and Muenster arch. …

Structure And Function Analysis Of Par-4, Nadia M. El-Guendy

University of Kentucky Doctoral Dissertations

Par-4 is a leucine zipper domain protein that induces apoptosis on its own in certain cancer cells and in Ras-transformed cells, but not in normal or immortalized cells. Par-4 induces apoptosis by activation of the Fas death receptor pathway and co-parallel inhibition of NF-B transcription activity. Cells that are resistant to apoptosis by Par-4 alone, however, are greatly sensitized by Par-4 to the action of other pro-apoptotic insults such as growth factor withdrawal, TNF, ionizing radiation, intracellular calcium elevation, or those involved in neuronal degeneration such as Alzheimer's, Parkinson's, Huntington's and Stroke. Previous studies have suggested that the apoptosis-sensitization potential …

The Role Of Nf-Kb Activation In Hepatic Tumor Promotion By Polycholorinated Biphenyls (Pcbs), Zijing Lu

University of Kentucky Doctoral Dissertations

Polychlorinated biphenyls (PCBs) are nongenotoxic hepatic tumor promoters. PCBs have been shown to cause oxidative stress, but the exact mechanism by which PCBs exert their tumor promoting activity is not clear. In our study, PCB-153, a non-coplanar congener, caused a transient increase in hepatic NF-B DNA binding activity and cell proliferation, while PCB-77, a coplanar congener, showed no effect. Our second study using a mouse model that was deficient in the p50 subunit of NF-kB (p50-/-) showed that NF-kB contributes to the changes in hepatocyte proliferation and apoptosis in response to PCB-153 treatment: a single dose of PCB-153 increased hepatic …

Effects Of Seductive And Boring Details On Readers' Comprehension Of Explanatory Texts, Gregory Scott Johnston

University of Kentucky Doctoral Dissertations

Two experiments were conducted that examined the effects of tangential information on readers' comprehension of explanatory texts. Participants were recruited from Introduction to Psychology courses. They were assigned to read one of three versions of a text (i.e., a base-text version, a base-text plus seductive details version or a base-text plus boring details version) about the process of lightning or the lifecycle of a white dwarf star. In Experiment 1, participants were told they had to write down everything they could remember from their passage when they finished reading. The base-text group recalled more of the core content than either …

Creation Of A Bacterial Mutagenicity Assay Highly Sensitive To Dialkylnitrosamines, Matthew Troy Cooper

University of Kentucky Doctoral Dissertations

Although dialkylnitrosamines are environmentally significant carcinogens, the use of short-term bioassays to assess the mutagenic potential of these compounds remains problematic. The Ames test, a mutagenicity assay based on the reversion of Salmonella typhimurium histidine auxotrophs, is the most widely used bioassay in genetic toxicology, but the traditional Ames tester strains are largely insensitive to dialkylnitrosamine mutagenicity. I have constructed several mutagenicity tester strains that co-express combinations of full-length human cytochrome P450 2E1, rat cytochrome P450 reductase, and human cytochrome b5 in S. typhimurium lacking ogt and ada methyltransferases (YG7104ER, ogt-; and YG7108ER, ogt-, ada-). These new strains are susceptible …

A Design For The Infusion Of State Mandated Technology Standards Into A Teacher Education Credentialing Program, Paul F. Massmann

Abraham S. Fischler College of Education ETD Archive

This applied dissertation was designed to infuse state mandated technology standards into the curriculum of a small university accredited to grant teaching certification. The state recently revised its requirements for the entire credential process. In doing so, they developed a much more demanding set of technology standards than those currently in place in the program. This new set of requirements included not only specific standards to be met by the credential candidate, but required the faculty to model these standards in their traditional face-to-face classes. The goal was to effectively implement these new standards.

The solution had two distinct tracks. …

Spiritual Responses To The Regulation Of Birth (A Historical Comparison), Richard J. Fehring, Elizabeth Mcgraw

College of Nursing Faculty Research and Publications

Over 30 years ago the founders of the Christian Family Movement (CFM), a worldwide Catholic family action group, conducted a survey to investigate the marital effects of practicing “rhythm.” Their final report indicated that many participants felt that periodic abstinence was harmful to their marriage and caused spiritual and religious distress. The CFM survey results were thought to have been influential in convincing the 1966 Papal Birth Control Commission to recommend a change in church teaching. The purpose of this paper is to report a re-analysis of the 1966 archived data (in the light of the Papal Encyclical Humane Vitae–On …

Rearing The Child Who Is Technology Dependent: Perceptions Of Parents And Home Care Nurses, Maureen O'Brien, Carole B. Wegner

College of Nursing Faculty Research and Publications

ISSUES AND PURPOSE. Most children who are dependent on technology for survival live with their families at home. This study explores the perceptions of parents and home care nurses regarding rearing the technology-dependent child.

DESIGN AND METHODS. In this qualitative study, interviews were conducted with 16 parents whose child is technology dependent and 15 registered nurses who provided home care.

RESULTS. Rearing the child who is technology dependent is similar to but different from raising other children. Parental communication and negotiation of child-rearing expectations with home care nurses is essential.

PRACTICE IMPLICATIONS. Improved collaboration and communication between parents and nurses …

Thermal Stability And Flame Retardancy Of Poly(Methyl Methacrylate)-Clay Nanocomposites, Jin Zhu, Paul Start, Kenneth A. Mauritz, Charles A. Wilkie

Chemistry Faculty Research and Publications

Three ammonium salts, hexadecylallyldimethyl ammonium chloride (Allyl16), hexadecylvinylbenzyldimethyl ammonium chloride (VB16) and hexadecylvinylbenzyldimethyl ammonium chloride (Bz16) were synthesized and ion exchanged onto montmorillonite. Poly(methyl methacrylate)–clay nanocomposites of all three clays were prepared by bulk polymerization and the resulting nanocomposites were characterized by X-ray diffraction and transmission electron microscopy. The clays which contain a pendant double bond are more likely to give an exfoliated material while that which contains no double bond is intercalated. The thermal stability and flame retardancy were measured by thermogravimetric analysis (TGA) and Cone Calorimetry respectively.

An Xps Study Of The Thermal Degradation Of Polystyrene-Clay Nanocomposites, Jianqi Wang, Jianxin Du, Jin Zhu, Charles A. Wilkie

Chemistry Faculty Research and Publications

X-ray photoelectron spectroscopy, XPS, has been used to examine several polystyrene-clay nanocomposites. The accumulation of oxygen, from the almuniosilicate, on the surface of the polymer was observed, along with the loss of carbon. This confirms that the barrier properties of the clay provide a mechanism by which nanocomposite formation can enhance the fire retardancy of the polymers. No difference is detected depending upon the extent of exfoliation or intercalation of the nanocomposite. #2002 Elsevier Science Ltd. All rights reserved.

Three-Dimensional Structure Of The Complexin/Snare Complex, Xiaocheng Chen, Diana R. Tomchick, Evgenii L. Kovrigin, Demet Araç, Mischa Machius, Thomas C. Südhof, Josep Rizo

Chemistry Faculty Research and Publications

During neurotransmitter release, the neuronal SNARE proteins synaptobrevin/VAMP, syntaxin, and SNAP-25 form a four-helix bundle, the SNARE complex, that pulls the synaptic vesicle and plasma membranes together possibly causing membrane fusion. Complexin binds tightly to the SNARE complex and is essential for efficient Ca²⁺-evoked neurotransmitter release. A combined X-ray and TROSY-based NMR study now reveals the atomic structure of the complexin/SNARE complex. Complexin binds in an antiparallel α-helical conformation to the groove between the synaptobrevin and syntaxin helices. This interaction stabilizes the interface between these two helices, which bears the repulsive forces between the apposed membranes. These results …

Hydrolysis Of Thionopeptides By The Aminopeptidase From Aeromonas Proteolytica:  Insight Into Substrate Binding, David L. Bienvenue, Danuta M. Gilner, Richard C. Holz

Chemistry Faculty Research and Publications

A series of l-leucine aniline analogues were synthesized that contained either a carbonyl or thiocarbonyl as a part of the amide bond. Additionally, the para-position on the phenyl ring of several substrates was altered with various electron-withdrawing or donating groups. The kinetic constants K_m and k_cat were determined for the hydrolysis of each of these compounds in the presence of the aminopeptidase from Aeromonas proteolytica (AAP) containing either Zn(II) or Cd(II). The dizinc(II) form of AAP ([ZnZn(AAP)]) was able to cleave both carbonyl and thiocarbonyl containing peptide substrates with similar efficiency. However, the dicadmium(II) form of AAP …

Overexpression And Divalent Metal Binding Properties Of The Methionyl Aminopeptidase From Pyrococcus Furiosus, Lu Meng, Shane Ruebush, Ventris M. D'Souza, Alicja J. Copik, Susumu Tsunasawa, Richard C. Holz

Chemistry Faculty Research and Publications

The gene encoding for the methionyl aminopeptidase from the hyperthermophilic archaeon Pyrococcus furiosus (PfMetAP-II; EC 3.4.11.18) has been inserted into a pET 27b(+) vector and overexpressed in Escherichia coli. The new expression system resulted in a 5-fold increase in purified enzyme obtained from a 5 L fermentor growth. The as-purified PfMetAP-II enzyme, to which no exogenous metal ions or EDTA was added, was found to have 1.2 equiv of zinc and 0.1 equiv of iron present by ICP-AES analysis. This enzyme had a specific activity of 5 units/mg, a 60-fold decrease from the fully loaded Fe(II) …

Development Of An Antiviolence Policy For Faculty Of Medcentral Hospital School Of Nursing, Nancy Martin

Abraham S. Fischler College of Education ETD Archive

The faculty at MedCentral Hospital School of Nursing did not know how to handle incidences of hostility and violent behavior involving students. While some of the faculty ignored or minimized threats, some took them as a danger to their safety. A protocol did not 2 exist that would give direction to the faculty and the director of the school of nursing. The purpose of the study was to develop an antiviolence policy for faculty of MedCentral Hospital School of Nursing. The research question was: "What is the appropriate form and content for an antiviolence policy for faculty of MedCentral Hospital …

The Development Of A Workshop To Promote A Team Approach To Fundraising At Tri-County Community College, Terrie Kelly

Abraham S. Fischler College of Education ETD Archive

Tri-County Community College is operating in an environment of severe economic hardship, just at a time when the college community needs the college the most. The state of North Carolina is grappling with a projected 900 million dollar budget shortfall (McKnight, 2002). This fiscal year, all North Carolina community college budgets have suffered a four percent budget reversion with another reversion of up to eight per cent expected before the year ends (North Carolina Association for Community College Presidents, 2002).

At the same time, Tri-County Community College enrollment has soared due to several manufacturing plant closures. Since the year 2000, …

Development Of A Handbook For Implementing Distance Learning Programs At Mcintosh College, James K. Dowding

Abraham S. Fischler College of Education ETD Archive

As the world of higher education is abuzz with the concept of distance education and online courses, many colleges see the Internet as the goose that lays the golden egg. McIntosh College and the Career Education Corporation would also like to develop on-line and distance education programs. The key to developing a successful program requires a comprehensive process model to follow. The problem is that McIntosh College does not have a procedure to develop online courses or online supplements.

The need for distance education comes from several factors. First is the changing profile of students. As McIntosh College has grown, …

A Comparison Of Knowledge Levels Of Diabetic Patients In A Hospital Environment To Those At An Alternate Site, Maudia L. Gentry

Abraham S. Fischler College of Education ETD Archive

The Dallas County Hospital District currently provides diabetic health education 2 classes to anyone who has been diagnosed with diabetes. The Community Oriented Primary Care (COPC) clinics also provide health education classes to anyone diagnosed with diabetes. Health education is offered to all diabetic patients. Furthermore, many patients who are admitted to the hospital for the treatment of diabetes are provided more in-depth health education on the prevention of the disease. The COPC division has seven clinics that operate in the Dallas sector, and all clinics offer diabetic health education classes to Dallas County citizens who have been diagnosed with …

Space And Organizations: The Ecology Of Rural Ngos In San Luis Potosi, Mexico, Patricia Marie Campion

LSU Doctoral Dissertations

The field of organizational ecology has been reduced to studies of population dynamics. Ecology, however, is a much broader field, that includes relational, spatial, and temporal dimensions. It allows us to combine existing theories of organizations to study their distribution across space. I combine insights from the new institutionalism, population ecology, and resource-dependence theory, to investigate the factors that influence the location of NGO activities in the state of San Luis Potosí­, Mexico. I conducted interviews and participant observation in 51 rural NGOs. The uneven distribution of NGOs in the state is not the result of their strategy to reach …

Communication Characterizing Successful Long Distance Marriages, Andrea Towers Scott

LSU Doctoral Dissertations

The current study seeks to explore the communication in successful career-induced long distance marriages. Elements examined are relational dialectics, relationship satisfaction, communication satisfaction, feelings of (mis)understanding, couple types, relationship sustenance, imagined interactions, and social support. The current study has three primary contributions: 1) the quantitative exploration of a communication in a growing marital framework, 2) the successful quantification of dialectics, and 3) the overall support for studying long distance marriages. The current study reports data collected from 92 individuals in non-military career-induced long distance marriages. All participants completed an 18-page questionnaire consisting of quantitative measures for the variables listed above, …

Steric Hindrance As A Mechanistic Probe For Olefin Reactivity:  Variability Of The Hydrogenic Canopy Over The Isomeric Adamantylideneadamantane/Sesquihomoadamantene Pair (A Combined Experimental And Theoretical Study), Rajendra Rathore, Sergey V. Lindeman, C.-J. Zhu, T. Mori, R. Schleyer, Jay K. Kochi

Chemistry Faculty Research and Publications

Access to each CC face of adamantylideneadamantane (AA) and sesquihomoadamantene (SA) is hindered by the hydrogenic canopy consisting of four β-hydrogens; otherwise, these olefins have quite normal environments. X-ray crystallography and density functional (DFT) calculations show a 0.5 Å larger annular opening in the protective cover of AA than that in SA. This contributes to the remarkable differences in reactivity toward various reagents, not only by limiting access to the olefin site in SA but also by inhibiting reactions which force these hydrogens closer together. Thus, AA is subject to typical olefin-addition reactions with bromine, …

Molecular Structures Of The Metastable Charge-Transfer Complexes Of Benzene (And Toluene) With Bromine As The Pre-Reactive Intermediates In Electrophilic Aromatic Bromination, Alexandr V. Vasilyev, Sergey V. Lindeman, Jay K. Kochi

Chemistry Faculty Research and Publications

Successful crystallization and X-ray crystallographic analyses of the highly metastable (1∶1) complexes of bromine with benzene and toluene establish the unique (localized) structure B that differs in notable ways from the long-accepted (delocalized) structure A. Furthermore, we demonstrate the (highly structured) charge-transfer complexes [C₆H₆,Br₂] and [CH₃C₆H₅,Br₂] to be the pre-reactive intermediates that are converted (via an overall Br⁺ transfer) to the Wheland intermediates in electrophilic aromatic bromination. The role of the dative ion pairs [C₆H₆˙⁺ Br₂˙ …

Current Status Of Defensins And Their Role In Innate And Adaptive Immunity, Periathamby A. Raj, Andrew R. Dentino

School of Dentistry Faculty Research and Publications

Naturally occurring antimicrobial cationic polypeptides play a major role in innate and adaptive immunity. These polypeptides are found to be either linear and unstructured or structured through disulfide bonds. Among the structured antimicrobial polypeptides, defensins comprise a family of cysteine-rich cationic polypeptides that contribute significantly to host defense against the invasion of microorganisms in animals, humans, insects and plants. Their wide-spread occurrence in various tissues of these diverse organisms, and their importance in innate and adaptive immunity have led to their identification, isolation and characterization. A large volume of literature is available on defensins’ occurrence, structural characterization, gene expression and …

"Los Motz E.L So": Words Melody, And Their Interaction In The Songs Of Folquet De Marseille, Nancy Ellen Washer

LSU Doctoral Dissertations

Although the poems of the troubadours have been extensively studied almost since they were first composed and the troubadours themselves indicate that they tried to create interactions between the melodies and the words, the melodies and the interactions between the poems and melodies in the complete songs have been examined much less intensively. In this dissertation I delve into the songs of the late twelfth-century troubadour Folquet de Marseille whose thirteen songs surviving with their melodies provide a varied collection of a suitable size to permit intensive analysis of poetic and musical compositional practices and the interactions between the two. …

Text And Structure In Schoenberg's Op. 50, And An Original Composition, Symphony #1, Thomas, Jr. Michael Couvillon

LSU Doctoral Dissertations

Part One of this document provides an analytical study of Schoenberg's final opus, Op. 50, three religious choral works written in the serial style: Driemal Tausend Jahre, Op. 50a (1949), De Profundis, Op. 50b (1950), and Modern Psalm, Op. 50c (1951). This study is divided into five chapters: an introduction, a conclusion, and a chapter of analysis for each of the three pieces. Analysis of these pieces reveals three significant conclusions: 1) Schoenberg consistently incorporates areas of relative consonance and pitch emphasis into his serial structures; 2) these areas of pitch emphasis, together with other musical devices are used to …

Subversive Aspects Of American Musical Theatre, Donald Elgan Whittaker Iii

LSU Doctoral Dissertations

Critical discourse regarding musical theatre takes, for the most part, the form of a profound silence, due presumably to a dismissal of the genre as simplistic and insubstantial. Not only have the elements of musical theatre been present in the majority of theatrical history, but many of the greatest theories regarding theatre have included these elements, including Brecht and Wagner. Musicals have also often concerned themselves with the Other, centering and sympathizing him/her in a manner unavailable to non-musical works. The Others that have thus been positioned are often delineated from hegemonic groups which are concretely those in power, but …

American Transcendental Vision: Emerson To Chaplin, Bill R. Scalia

LSU Doctoral Dissertations

Ralph Waldo Emerson's publication of Nature in 1836 began a process of creating a new condition of American thinking, severed from European cultural and intellectual influences. The subsequent lectures The American Scholar and The Divinity School Address furthered this process, calling for an original American literature. Emerson's writing called consistently for poets with the ability to "see" past the material, apparent world to the world of eternal forms, which shaped nature in accordance with a divine moral imperative. Through this connection, man-as-poet would discover God in himself. In short, Emerson effectively transferred divinity from Unitarian doctrine to the individual, thereby …

The Effects Of Socioeconomic Status, Social Support, And Acculturation On The Mental And Physical Health Among Korean American Older Adults In Chicago Metropolitan Area, Shinyeol Kim

LSU Doctoral Dissertations

The purpose of this study was to examine the way that Socioeconomic status (SES), social support, and acculturation may influence physical and mental health status of Korean American older adults. It was premised that SES, social support and acculturation are directly and/or indirectly related to the mental and physical health status of Korean American older adults manifested by respective symptoms. The following two objectives were established: 1) Explore the characteristics of Korean American older adults including socioeconomic status, acculturation level, social support, and physical and mental health status. 2) Assess direct and indirect effects of socioeconomic status, acculturation level, and …

Molecular Phylogeny Of Melanospora And Diaporthales, And Population Genetics Of Dogwood Anthracnose Fungus, Ning Zhang

LSU Doctoral Dissertations

Unresolved phylogenetic problems in pyrenomycetes and population structure of an asexual plant pathogen (Discula destructiva) were investigated. Analyses based on DNA sequences of nuclear encoded small and large subunit RNA genes (SSU and LSU nrDNA) and deduced amino acid sequences of a subunit of RNA polymerase II gene (RPB2) indicated that five genera previously considered in Ceratostomataceae of Sordariales were related to Hypocreales. Melanospora (including the type) and a genus of Ceratostomataceae formed a basal clade, but monophyly of the five genera and of the genus Melanospora was rejected. Discula destructiva and four other Discula species were derived from within …

Numerical Reservoir Characterization Using Dimensionless Scale Numbers With Application In Upscaling, Djuro Novakovic

LSU Doctoral Dissertations

Dimensionless space provides a tool for analyzing the behavior of complex systems described by mathematical relationships. The limited application of dimensionless variables in numerical reservoir simulation and experimental design motivated the development of a complete set of dimensionless scaling groups. Inspectional analysis yielded 8 dimensionless groups completely describing the flow system. Further analysis of fluid interaction reduced the number of dimensionless groups to 7. The newly developed dimensionless equations and groups were used for analytical and numerical reservoir characterization, quantifying the behavior of differential and difference equations employed in fluid flow in three-dimensional porous media. The behavior of the dimensionless …