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Molecular Analyses Of Motility And Chemotaxis Genes And Their Organization In Borrelia Burgdorferi., Yigong Ge Jan 1996

Molecular Analyses Of Motility And Chemotaxis Genes And Their Organization In Borrelia Burgdorferi., Yigong Ge

Graduate Theses, Dissertations, and Problem Reports (ETD)

Motility and chemotaxis have been considered as important candidates for the study of virulence in many pathogenic spirochetes, including B. burgdorferi. Little is known about the underlying mechanisms of motility and chemotaxis. In this study, we have carried out an extensive search for the motility and chemotaxis genes in B. burgdorferi. The unique technique of "semi-random PCR chromosome walking" was developed and used to clone several large motility and chemotaxis gene clusters. Together with the previously reported flaB and flgE genes, 38 motility and chemotaxis related genes (more than 36 kb) were identified. These genes demonstrated extensive homology with their …

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A Study Of The Relationships Among Teacher Inservice Training, Geographic Residence, Student Knowledge Acquisition, And Student Marine Experiences In The Evaluation Of A Marine Science Curriculum., Malcolm Keith Mcewen Jan 1996

A Study Of The Relationships Among Teacher Inservice Training, Geographic Residence, Student Knowledge Acquisition, And Student Marine Experiences In The Evaluation Of A Marine Science Curriculum., Malcolm Keith Mcewen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Man and the Gulf of Mexico (MGM) was a federally-funded curriculum development project which produced a four-volume set of marine science curriculum materials for use by junior high and secondary school students in Alabama and Mississippi. Individual titles in the series are Marine and Estuarine Ecology, Marine Habitats, Diversity of Marine Animals, and Diversity of Marine Plants. The purpose of this study was to evaluate the implementation of these materials by investigating the possible relationships among MGM-based inservice teacher training, geographic residence of students, marine science knowledge acquisition by students as measured by the "MGM Unit Achievement Tests", student evaluations …

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Nuclear Magnetic Resonance Studies Of Hydrogen-Bonded Solids., Alexander Nikol Klymachyov Jan 1996

Nuclear Magnetic Resonance Studies Of Hydrogen-Bonded Solids., Alexander Nikol Klymachyov

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation focused on two aspects of Nuclear Magnetic Resonance (NMR) techniques in the solid state: (i) the possibility of enhancing the NMR spectral resolution via utilization of single crystals (instead of powders) in the magic angle spinning experiments, and (ii) application of this methodology as a new probe in the studies of the microscopic mechanism of solid-solid phase transitions in hydrogen-bonded solids. The bulk of the studies employed a CMX 360 NMR spectrometer with multinuclear double-resonance probes, operating at 360 MHz for protons, and variable temperatures over the range of {dollar}-{dollar}150 to 250{dollar}\\sp\\circ{dollar}C. The samples investigated were squaric acid …

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Pictorial Graphic Organizers, Navigation, And Hypermedia: Converging Constructivist And Cognitive Theories., Cheryl Ann Krawchuk Jan 1996

Pictorial Graphic Organizers, Navigation, And Hypermedia: Converging Constructivist And Cognitive Theories., Cheryl Ann Krawchuk

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined differences in cognitive structure, content knowledge, navigational difficulties, and personal interviews between organizer and non-organizer students in a hypermedia environment. This information was used to ascertain the feasibility of using the pictorial graphic organizer as a tool to help alleviate navigational difficulties in a learner-controlled hypermedia environment without imposing structure on the student. Sixty-nine students from an undergraduate course completed a computer questionnaire as well as a pre content knowledge test and a Pathfinder network. They were then exposed to a hypermedia program with the organizer group using a program that contained a pictorial graphic organizer and …

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Synthesis Of (3)Cumulenes, Enyne(3)Cumulenes, Enyne-Allenes And (Z,Z)-3,5-Octadiene-1,7-Diynes And Their Cyclizations To Polycyclic Compounds., Bin Liu Jan 1996

Synthesis Of (3)Cumulenes, Enyne(3)Cumulenes, Enyne-Allenes And (Z,Z)-3,5-Octadiene-1,7-Diynes And Their Cyclizations To Polycyclic Compounds., Bin Liu

Graduate Theses, Dissertations, and Problem Reports (ETD)

1,2,3-Butatrienes ( (3) cumulenes) were synthesized via 1,4-eliminations of hydroxytrimethylsilanes from 4-(trimethylsilyl)-2-butyn-1-ols. The precursors, 4-(trimethylsilyl)-2-butyn-1-ols, were easily prepared from a propargylic trimethylsilane and an aldehyde or a ketone. Treatment of the propargylic trimethylsilane in THF with n-butyllithium followed by condensation with an aldehyde or a ketone afforded 4-(trimethylsilyl)-2-butyn-1-ols in good yields. Sequential treatment of 4-(trimethylsilyl)-2-butyn-1-ols with n-butyllithium, methanesulfonyl chloride, and TBAF furnished the corresponding (3) cumulenes in good yields. (3) Cumulenes with diverse chemical structures were synthesized by selecting different combinations of aldehydes or ketones for condensation with propargylic trimethylsilanes to produce the cumulene precursors. The enyne (3) cumulenes were …

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Development And Assessment Of A Standard Dissolution Methodology For Protein-Based Injectable Suspensions., Sunil Prabhu Jan 1996

Development And Assessment Of A Standard Dissolution Methodology For Protein-Based Injectable Suspensions., Sunil Prabhu

Graduate Theses, Dissertations, and Problem Reports (ETD)

To date, no standard dissolution methodology is recognized in the official compendia for protein-based injectable suspensions. Development of a sensitive dissolution method would have utility as an in vitro quality control tool and an indicator of associated in vivo product performance. Using the spin-filter as the dissolution device of choice, the objective of these studies was to develop a standard dissolution methodology for protein-based suspensions. Secondarily, the objective was to elucidate the steps which critically influence ion-complexed protein dissolution, and assess the magnitude of their effect. In Phase I of dissolution methodology development, studies of the device hydrodynamics concluded that …

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The Americans With Disabilities Act: Considerations For Dental Admissions And Accommodations., Shelia S. Price Jan 1996

The Americans With Disabilities Act: Considerations For Dental Admissions And Accommodations., Shelia S. Price

Graduate Theses, Dissertations, and Problem Reports (ETD)

To assist U.S. dental schools/colleges in meeting the mandates of the ADA, this study examined the key findings in relevant court cases, explored accommodations that are being made by dental programs, investigated barriers encountered when providing accommodations, and gathered data on admission policies, criteria and procedures. In 1995 a mail survey of all U.S. dental schools/colleges was conducted (N = 54). Forty-five completed questionnaires were returned, yielding 83 percent response. Six dental programs have adopted technical standards. The major skill areas addressed in each of these documents are communication; observation; intellectual-conceptual, integrative and quantitative; behavioral and emotional; and motor abilities. …

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An Investigation Of Gender Equity In The Medical Coverage And Injury Prevention Of Basketball Programs As Identified By Head Athletic Trainers At Ncaa Division I Colleges And Universities., Joseph Alan Beckett Jan 1996

An Investigation Of Gender Equity In The Medical Coverage And Injury Prevention Of Basketball Programs As Identified By Head Athletic Trainers At Ncaa Division I Colleges And Universities., Joseph Alan Beckett

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to investigate gender equity in medical coverage and injury prevention of basketball programs at NCAA Division I colleges and universities. The population for this study were 100 randomly sampled head athletic trainers at NCAA Division I colleges and universities that compete in both men's and women's basketball. Each participant was mailed a survey packet containing a cover letter and a questionnaire. The total return rate was 69%. The data were analyzed using the Statistical Analysis Systems. Analyses of Variance, Chi-Square, frequency distributions, and Duncan's Multiple Range Tests were used to answer the two research …

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Examining Template Switching During Retroviral Reverse Transcription., Ella Harvey Bowman Jan 1996

Examining Template Switching During Retroviral Reverse Transcription., Ella Harvey Bowman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Currently, the Acquired Immune Deficiency Syndrome (AIDS) epidemic is world-wide and threatens the entire human population. The causative agent of AIDS is Human Immunodeficiency Virus (HIV), a retrovirus. The HIV viral population exhibits tremendous variation, making the development of vaccines difficult and anti-viral drug therapy ineffective due to the emergence of drug-resistant HIV strains. The main goal of this dissertation is to better understand how retroviral variation is generated to ultimately aid the development of effective anti-retroviral therapies and vaccines. The experiments described throughout this dissertation incorporate the use of simple retrovirus model systems to study template switching events during …

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A Cellular Model For Automatic Transport Systems., Yang Cai Jan 1996

A Cellular Model For Automatic Transport Systems., Yang Cai

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this study, the Transit Automata (TA) model, a Cellular Automata (CA) based spatial model, has been developed. It includes a set of cells, states, rules, events, and a system clock. In contrast to CA, a TA model fragments the problem space along restricted routes. All cells on the routes are treated as equal and controlled by rules. Like CA models, an initial configuration of a TA model can be embedded and can be dynamically changed during the runtime. Furthermore, user-controlled events and stochastic events are used to trigger the discrete events of the model. A TA model is a …

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Correlation Of In-Facepiece Sampling Methods Using A Simulated Health-Care Workplace Test., Christopher Charles Coffey Jan 1996

Correlation Of In-Facepiece Sampling Methods Using A Simulated Health-Care Workplace Test., Christopher Charles Coffey

Graduate Theses, Dissertations, and Problem Reports (ETD)

For a number of years, it was assumed that the protection measured during a laboratory fit test was indicative of the protection provided by the respirator during actual use in the workplace. Beginning in the early 1980's, workplace protection factor studies were conducted to validate this assumption. These studies indicated that quantitative fit test results did not correlate with actual workplace protection factors. A fit test that indicates the degree of exposure is especially important when Mycobacterium tuberculosis (TB) exposures are involved. This study tested the correlation of fit factors to the subject's actual exposure using biological sampling. Six quantitative …

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Silica-Induced Pulmonary Inflammation And Fibrosis: Toxicological Implications And Pharmacological Modulation., Michael Dimatteo Jan 1996

Silica-Induced Pulmonary Inflammation And Fibrosis: Toxicological Implications And Pharmacological Modulation., Michael Dimatteo

Graduate Theses, Dissertations, and Problem Reports (ETD)

Human exposure to silica is of great occupational concern as it is marked by pulmonary inflammation and fibrosis. The present work was performed to investigate, characterize, and modulate the responses that occur as a result of silica exposure. The intratracheal instillation of silica to rats results in pulmonary fibrosis but the cellular processes involved in the development of the chronic disease have not been well characterized. The hypothesis of this study was that pharmacological intervention early in the silica-induced inflammatory cascade will attenuate fibrosis development. The acute phase response to silica appears by 2 hours after instillation as evidenced by …

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Assessing The Impact Of The West Virginia K-12 Ruralnet Project On Teachers' Views., Thomas P. Ditty Jan 1996

Assessing The Impact Of The West Virginia K-12 Ruralnet Project On Teachers' Views., Thomas P. Ditty

Graduate Theses, Dissertations, and Problem Reports (ETD)

Teachers play a key role in implementing curriculum changes in the science classroom. The evaluation of teachers' views regarding the relationships that exist between science, technology, and society can strengthen the link between curricular reforms and the content that students' acquire in their learning experiences and contribute to the improvement of preservice and inservice teacher education programs. The purpose of this investigation was to determine if participation in the West Virginia K-12 RuralNet Project has impacted teachers' views about science, technology, and society interactions. This investigation employed a matched-group quasi-experimental research design which involved 58 West Virginia (K-12) teachers. The …

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Intensity Of Systemic Alarms In Content-Specific Fear Conditioning Comparing 20 Percent Vs. 13 Percent Carbon Dioxide-Enriched Air As Ucss., John Patrick Forsyth Jan 1996

Intensity Of Systemic Alarms In Content-Specific Fear Conditioning Comparing 20 Percent Vs. 13 Percent Carbon Dioxide-Enriched Air As Ucss., John Patrick Forsyth

Graduate Theses, Dissertations, and Problem Reports (ETD)

To examine the relation between the intensity of systemic bodily events and content-specific fear conditioning to stimuli that are fear-relevant or prepared for such associations, the present study involved a direct comparison between the conditioning effects produced by 20% and 13% CO{dollar}\\sb2{dollar}-enriched air (UCSs) to three CS types: external fear-relevant (snake moving toward viewer), internal fear-irrelevant (human heart beating arrhythmically), or neutral control (flowers swaying in the wind). Sex-balanced groups of undergraduate participants (N = 96) were assigned to one of the three CSs, and within each CS, to either 20% or 13% CO{dollar}\\sb2{dollar}-enriched air (UCSs). A variety of autonomic …

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Physical Properties And Erodibility Of Fly Ash Used As A Topsoil Substitute In Mine Land Reclamation., James Michael Gorman Jan 1996

Physical Properties And Erodibility Of Fly Ash Used As A Topsoil Substitute In Mine Land Reclamation., James Michael Gorman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fly ash, a "waste" product from coal fired power plants, may show great potential for use as a topsoil substitute in revegetating extremely adverse minesites such as abandoned mine land (AML) and coal refuse due to improvements in chemical and physical properties. In the period 1989 to 1991, two separate studies examined the effects of fly ash used as a topsoil substitute on the physical properties of minesoils in northcentral West Virginia. One study, involving fly ash from three different power plant sources, examined effects on physical properties three years after plot establishment. The other study, which involved fly ash/wood …

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Selenium Requirement For Oligodendrocyte Differentiation., Jin Gu Jan 1996

Selenium Requirement For Oligodendrocyte Differentiation., Jin Gu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Selenium is a nutritionally essential trace element for mammals, and several studies have suggested that selenium may have an important function in the central nervous system. We hypothesized that selenium may play an important role in the differentiation of myelin producing cells, i.e., oligodendrocytes in developing brain. We employed an in vitro model system of glial cell cultures prepared from newborn rat brains to test this hypothesis. In mixed glial cell cultures, selenium deficiency inhibited developmental upregulation of myelin-specific genes, i.e., proteolipid protein (PLP), basic protein (BP) and myelin-associated glycoprotein (MAG) as assessed by Northern blot analysis. The effect of …

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Sex Chromosomes And Micronuclei In Human Lymphocytes., John Christopher Hando Jan 1996

Sex Chromosomes And Micronuclei In Human Lymphocytes., John Christopher Hando

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objectives of this study were to determine in humans the relationship between sex chromosome loss and increased micronucleus frequencies with age, the establishment of sex chromosome loss frequencies unbiased by cellular survival factors, the involvement of kinetochore proteins in sex chromosome loss and the effect of smoking. Additionally, this study was to establish the involvement of the active and inactive X chromosomes in micronucleus formation. Blood samples were obtained from 38 adult females, 8 newborn females, 35 adult males, 18 newborn males, 2 females with stable X;9 translocations and 7 Turner syndrome individuals. Lymphocytes were separated, cultured and blocked …

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The Interrelation Of Gypsy Culture And School Culture: An Ethnography Study Of Interactions., Marina Izquierdo Carter Jan 1996

The Interrelation Of Gypsy Culture And School Culture: An Ethnography Study Of Interactions., Marina Izquierdo Carter

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purposes of this study were to gain an understanding of the Gypsy culture and to discover the relationship, within the school domain, between the Gypsy children and the non-Gypsy teachers. The study was conducted in Malaga, Spain and lasted two and a half months. The research design for this study was qualitative. Data for this ethnographic research were gathered using three strategies: (1) participant observations, (2) interviews, (3) collecting school magazines. Three models of analysis for collected data were used: Domain analysis, Cultural Themes analysis, and Code Analysis. The Gypsy participants were part of the population of the Gypsy …

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Development Of Design Criteria For Long-Term Separation, Filtration And Drainage Behavior Of Nonwoven Geotextiles With Fly Ash., Mujahid Hussain Akram Jan 1996

Development Of Design Criteria For Long-Term Separation, Filtration And Drainage Behavior Of Nonwoven Geotextiles With Fly Ash., Mujahid Hussain Akram

Graduate Theses, Dissertations, and Problem Reports (ETD)

The long-term filtration behavior of six nonwoven geotextiles with fly ash from two different power plants was investigated. Five specimen preparation techniques were evaluated: Dry Method, ASTM Method (D 5101-90), Modified ASTM Method, Slurry Method, and Vibro-Prep. ASTM Procedure was modified. Vibro-Prep is a new technique to prepare specimens at higher density to simulate filtration behavior of nonwoven geotextiles in the field. In addition, a method was developed for testing of geotextiles under high hydraulic gradient (HHG). HHG method is an expedient technique to assess the long-term filtration behavior of geotextiles. The results of this investigation indicated that method of …

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Construction And Characterization Of Monolayer And Multilayer Self-Assembled Systems With Ionically Bound Redox Centers., Daniel Andrei Lowy Jan 1996

Construction And Characterization Of Monolayer And Multilayer Self-Assembled Systems With Ionically Bound Redox Centers., Daniel Andrei Lowy

Graduate Theses, Dissertations, and Problem Reports (ETD)

A new strategy in devising two-terminal voltammetric sensors is described. In our approach, such detectors are obtained by using ionic forces to confine two different redox groups to the same surface. The one is analyte-sensitive, and acts as the sensing site, while the other is analyte-insensitive, and thus operates as the reference site. The layer-by-layer deposition technique enabled us to attach multilayer systems to the surface of a gold electrode. To these multilayers various redox couples can be bound by ionic forces. One combination of an iron-based pH-sensitive redox group in conjunction with ferri-ferrocyanide was used to demonstrate the working …

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Nonlinear Chemical Dynamics: Competition And Convection Effects In Reaction-Diffusion Fronts And Controlling Chaos., Jonathan Masere Jan 1996

Nonlinear Chemical Dynamics: Competition And Convection Effects In Reaction-Diffusion Fronts And Controlling Chaos., Jonathan Masere

Graduate Theses, Dissertations, and Problem Reports (ETD)

Competition and convection effects in reaction-diffusion fronts and controlling chaos are studied. In Chapter 3 we report theoretical studies of competition in which two self-replicating organic molecules compete for a common reactant. We found that the self-replicating organic molecule can give sustained reaction-diffusion fronts. This phenomenon is investigated by numerical solutions of partial differential equations that couple local nonlinear kinetics and diffusion. Reaction-diffusion fronts involving competing species are then initiated and the concentration profiles of the autocatalysts monitored. The results show that the more reactive species totally predominates over the less reactive species as its front moves ahead into the …

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Disease And Socioeconomic Change: The Politics Of Colonial Health Care In Western Kenya, 1895-1939., George Oduor Ndege Jan 1996

Disease And Socioeconomic Change: The Politics Of Colonial Health Care In Western Kenya, 1895-1939., George Oduor Ndege

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study analyzes the interrelationship between disease and the politics of British colonial health care in western Kenya in the period 1895 and 1939. Based on a wide array of archival and secondary sources, the study contextualizes the evolution and development of British colonial health care system within the wider context of socio-economic changes in colonial western Kenya. The impact of various diseases on the nature, tempo and direction of socio-economic change in colonial western Kenya is examined. The responses of the British Colonial Office, the colonial state, African, European and Asian communities are also analyzed. The relationship between disease …

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Partial Isolation Of The Vitellogenin I Gene And The Characterization Of The Regulation For The Egg Yolk Protein Genes., Robert Stephen Edinger Jan 1996

Partial Isolation Of The Vitellogenin I Gene And The Characterization Of The Regulation For The Egg Yolk Protein Genes., Robert Stephen Edinger

Graduate Theses, Dissertations, and Problem Reports (ETD)

The chicken egg yolk protein genes, vitellogenin (VTG) I, II, III, and the very low density apolipoprotein II (apoVLDLII), are highly expressed in hepatic parenchymal cells in an estrogen-dependent manner. Compared to the other egg yolk protein genes which respond in approximately 2-4 hours after the primary administration of estrogen, the VTGI does not respond for about 20 hours. The mechanism of activation of the egg yolk protein genes is not completely known. Of the VTG genes VTGII and III promoter regions have been isolated and characterized, whereas the promoter region of the VTGI gene has yet to be identified. …

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Mechanisms Of Absorption And Metabolism Of Peptide Drugs In The Lung., Meenakshi G. Bhat Jan 1996

Mechanisms Of Absorption And Metabolism Of Peptide Drugs In The Lung., Meenakshi G. Bhat

Graduate Theses, Dissertations, and Problem Reports (ETD)

The pulmonary delivery of peptide drugs involves an understanding of the barriers to absorption which include poor permeability, potential activation of alveolar macrophages (AMs) and enzymatic degradation. The aim of the study is to develop methodologies to study the relative nature of respiratory tract epithelia. The dynamics of its regulation are also studied for examining the feasibility of achieving reversible increases in paracellular permeability. Transepithelial electrical resistance (TER) measurements coupled with flux studies of C-14 Mannitol were conducted employing isolated epithelial tissue from rabbits for estimation of comparative permeabilities. The dynamics of paracellular permeability was studied employing 0.1 mM cytochalasin …

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Multisubstrate Analog Inhibitors Of Glucosamine Synthase As Potential Antifungal Agents., Sridar Venkitakrishnan Chittur Jan 1996

Multisubstrate Analog Inhibitors Of Glucosamine Synthase As Potential Antifungal Agents., Sridar Venkitakrishnan Chittur

Graduate Theses, Dissertations, and Problem Reports (ETD)

Inhibition of the chitin biosynthetic enzyme, glucosamine synthase (EC.2.6.1.16, L-glutamine:D-Fructose-6-phosphate amidotransferase) has been shown to be a promising approach to the development of antifungal agents targeting the cell wall. The best known inhibitors of glucosamine synthase possess epoxy-ketones and {dollar}\\alpha,\\beta{dollar} unsaturated carbonyls. In vivo, these inherently reactive moieties are easily deactivated by nucleophiles like glutathione. Hence we decided to develop inhibitors lacking such highly reactive groups. Development of multisubstrate analogs is a logical approach to inhibition of multisubstrate enzymes. The compounds investigated in our study possess structural modifications of both glutamine and fructose-6-phosphate so as to bind to both binding …

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Re-Siting Memory: Reading Resistance Through Memorization In Three Margaret Atwood Novels., Uma Devi Palecanda K Jan 1996

Re-Siting Memory: Reading Resistance Through Memorization In Three Margaret Atwood Novels., Uma Devi Palecanda K

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the novels Lady Oracle, The Handmaid's Tale, and Cat's Eye, I locate and name the sites of memory to show how Atwood's protagonists appropriate them as their loci of resistance. The localized sites though marginalized are within the realm of representation; however, the "space-offs," a term I borrow from film theory, are beyond "the ideological." In these sites women create and/or validate counter-discourses that enable them to set up "politics of oppositionality" and provide them with a distance necessary to question the hegemonic. The localization of the sites eventually leads to the body as site. I acknowledge the changing …

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Validation Of The Slide Board As An Exercise Modality., Randal Paul Schober Jan 1996

Validation Of The Slide Board As An Exercise Modality., Randal Paul Schober

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to monitor physiological responses of children in grades 4 and 5 during incremental tests on slide board and bicycle exercise and to determine whether children enjoy the slide board as a fitness activity. Twenty healthy subjects (10M, 10F; 10.1 {dollar}\\pm{dollar}.72 yrs) completed maximum continuous tests in 3 minute stages on the slide board, beginning at 40 slides/min, increasing by 10 slides/min each stage; and on the bicycle beginning at 25 watts, increasing by 25 watts each stage. Heart rate (HR), blood pressure, VO{dollar}\\sb2{dollar}, and rating of perceived exertion (CERT) were measured at each stage. …

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Dna Radioprotection By Aminothiols., Christopher John Kolanko Jan 1996

Dna Radioprotection By Aminothiols., Christopher John Kolanko

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this study was to determine the dominant mechanism (OH-radical scavenging or non-OH-radical scavenging mechanisms) of radioprotection by the thiol scavenger dithiothreitol (DTT) making comparisons between a cellular and isolated plasmid DNA model systems. The protection mechanism of DTT was determined experimentally by comparing the thiol to known OH-radical scavenging compounds (dimethyl sulfoxide, glycerol and 1,3-dimethyluracil) measuring the relative differences in their protection factor for radiation-induced chromosome aberrations in cells and single-strand break induction in the plasmid DNA model. A follow-up study was conducted comparing radioprotection between DTT and the neutral thiol 2-mercaptoethanol (2ME) to determine the contribution …

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A Neural Network Approach For Implementing A High Dimension Reduction Feature Finder For Automatic Image Matching., Qiang Lin Jan 1996

A Neural Network Approach For Implementing A High Dimension Reduction Feature Finder For Automatic Image Matching., Qiang Lin

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation explores the Counter Propagation Network (CPN) to implement an image feature finder for automatic image matching systems. This research concludes that the CPN paradigm does not appear to be capable of extracting distinctive features for matching complex images such as fingerprints. There are three possible factors explored in the document that contribute to this inability to match. These are: (1) Image Enhancement - Most of fingerprint images have certain levels of localized blur or smear, locally low contrast, or other noise. Currently available image enhancement methods are shown to not suppress these noises effectively. (2) Image Invariance - …

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First Year Experiences Of Female College Students: A Qualitative Investigation., James M. Sottile Jan 1995

First Year Experiences Of Female College Students: A Qualitative Investigation., James M. Sottile

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this research was to describe and better understand the transition experiences of first-year women (18 years old) attending a land grant university in a Mid-Atlantic state. Transition was defined as the period of time from the participant's first-semester arrival on campus to the end of that first-semester. The main research question was: What do women experience during their first year (transition period) of college? From this main research question stemmed three sub-questions: (1) What is the nature of the social transition? (2) What is the nature of the educational transition as related to student development? and (3) …

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