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Second Year College Experiences That Affect Persistence And Attrition For First Generation And Continuing Generation Students At Small, Private Institutions., Angela Brown Taylor
Second Year College Experiences That Affect Persistence And Attrition For First Generation And Continuing Generation Students At Small, Private Institutions., Angela Brown Taylor
Electronic Theses and Dissertations
The persistence and attrition of second year college students is a growing concern of colleges and universities as second year college students face some of the greatest challenges (Gahagan & Hunter, 2006; Lemons & Richmond, 1987; Morgan & Davis, 1981; Wilder, 1993). This study examined the factors that predict second year student persistence for students who have enrolled at private institutions in the state of Kentucky. This study reviewed those pre-entry variables that predict persistence beyond the second year. Students were surveyed (during the end of) their fourth semester in college. Spady's (1970b) model of student dropout and Tinto's (1975) …
Factors Affecting Speech Intelligibility Improvement With Exposure To Reverberant Room Listening Environments., Eugene Brandewie
Factors Affecting Speech Intelligibility Improvement With Exposure To Reverberant Room Listening Environments., Eugene Brandewie
Electronic Theses and Dissertations
Speech intelligibility has been found to improve with prior exposure to a reverberant room environment. It is believed that perceptual mechanisms help maintain accurate speech perception under these adverse conditions. Potential factors underlying this speech enhancement effect were examined in three experiments. Experiment 1 studied the time course of speech intelligibility enhancement in multiple room environments. Carrier phrases of varying lengths were used to measure changes in speech intelligibility over time. Results showed an effect of speech enhancement with a time course that varied with the signal-to-noise ratio between the speech and a broad-band noise masker. Additionally, greater speech enhancement …
Carbon Nanomaterial Based Vapor Sensors., Silpa Kona
Carbon Nanomaterial Based Vapor Sensors., Silpa Kona
Electronic Theses and Dissertations
The discovery of carbon nanotubes and subsequently graphene has led to an interest in carbon materials as sensing elements due to their unique properties. Graphene is a 2-dimensional material that has a large surface area that can be exposed to surface adsorbates from a target gas. This enables studies on the interaction of gas molecules with the graphene surface and subsequent changes in its properties. Graphene also exhibits high conductivity and low noise and has low crystal defects. Due to its high electron mobility at room temperature, graphene exhibits high sensitivity (in tune of detecting ppm) which is a required …
A Novel High Yield Process For Gold Sulfide Nanoparticle Synthesis Via Shifting Equilibrium Of Self-Assembly Reaction., Dhruvinkumar Patel
A Novel High Yield Process For Gold Sulfide Nanoparticle Synthesis Via Shifting Equilibrium Of Self-Assembly Reaction., Dhruvinkumar Patel
Electronic Theses and Dissertations
Gold nanoparticles (AuNPs) have attracted enormous attention in the field of nanotechnology for applications such as, immunoassay, drug delivery, contrast enhancement and tumor therapy. The typical range of gold nanoparticles varies from 1– 150 nm; there are many different subtypes of AuNPs mainly based on size, shape, and optical properties including: gold nanospheres, nanorods, nanocages, and nanoshells. The main advantage of using gold nanoparticles is the large surface-to-volume ratio; this will allow the particles to be functionalized with drugs and/or targeting agents to create many novel applications. Many AuNPs have another advantage as well, they can be fabricated to either …
The Impact Of Edward Perry Warren On The Study And Collections Of Greek And Roman Antiquities In American Academia., James Murley 1947-
The Impact Of Edward Perry Warren On The Study And Collections Of Greek And Roman Antiquities In American Academia., James Murley 1947-
Electronic Theses and Dissertations
This dissertation assesses the influence of Edward Perry Warren (1860- 1928) on the development of collegiate collections of Greek and Roman art and the rise of art history and archaeology in elite academic institutions in the United States. It employs archival research to explore Warren's motivations for acquiring thousands of antiquities which he sold or gave to the Museum of Fine Arts, Boston and six collegiate museums and study collections. Organized into six chapters, this multidisciplinary dissertation describes Warren's roles at these institutions. It highlights antiquities that have figured prominently in scholarship and that demonstrate the range and variety of …
Regulation Of Vascular Smooth Muscle Cell Phenotype., Joshua Kuimeta Salabei
Regulation Of Vascular Smooth Muscle Cell Phenotype., Joshua Kuimeta Salabei
Electronic Theses and Dissertations
Vascular injury and chronic arterial diseases such as atherosclerosis and restenosis result in exposure of vascular smooth muscle cells (VSMCs) to increased concentrations of growth factors triggering a change from a contractile to a synthetic phenotype. The mechanisms by which growth factors trigger VSMC phenotype transitions remain unclear. Because phenotype switching involves the removal of contractile proteins, we hypothesized that autophagy is an essential modulator of VSMC phenotype. Also, the conversion to the synthetic phenotype is accompanied by cellular changes that trigger metabolic changes to meet the increasing demands for cellular energy. Little is known however about the contributions of …
A Model Of Resilience In Children At Risk For The Development Of Anxiety., Matthew David Hartman Schrock
A Model Of Resilience In Children At Risk For The Development Of Anxiety., Matthew David Hartman Schrock
Electronic Theses and Dissertations
Anxiety is a common and debilitating disorder in children. Until recently, research in the field of child anxiety has focused on the identification of specific risk factors in the development of child anxiety. More recent studies have begun to explore more complex models of the etiology of child anxiety, but most still focus on the interplay of risk factors. Studies examining the development of child anxiety should focus on the confluence of vulnerability, risk, and protective factors to provide a more complete picture of the development of child anxiety. The current study reviews current conceptual and empirical research to propose …
Tobacco Dependence Treatment Education For Dental Students Using Standardized Patients., Jacqueline A. Singleton 1955-
Tobacco Dependence Treatment Education For Dental Students Using Standardized Patients., Jacqueline A. Singleton 1955-
Electronic Theses and Dissertations
Dentists can play a key role in helping patients quit tobacco use by providing tobacco cessation treatment (TCT) in their practice. Although the majority of dentists receive training in TCT, most do not provide adequate intervention. Many feel they are not adequately trained. Using standardized patients (SPs) shows promise in TCT training by providing a simulated clinical environment for students to practice counseling skills with individuals trained to portray patients. Standardized patients evaluate students' skills and provide immediate feedback. The purpose of this study is to determine if there is a difference in dental students' attitudes, perceived barriers, subjective norms, …
Zooplankton In Freshwaters : Potential Responses To Global Warming, Nutrient Enrichment, And Exotic Jellyfish., Allison S. Smith
Zooplankton In Freshwaters : Potential Responses To Global Warming, Nutrient Enrichment, And Exotic Jellyfish., Allison S. Smith
Electronic Theses and Dissertations
Aquatic ecosystems face major transformations as humans increasingly alter their environment by introducing exotic species and changing the temperature regime and nutrient availability of freshwater systems. The impacts of such alterations of conditions, resources and species composition on zooplankton are important to consider because zooplankton link primary producers to higher trophic levels. Among recent exotic invaders of freshwater systems in Europe and the Western Hemisphere is Craspedacusta sowerbii. This freshwater cnidarian can impact zooplankton abundance and community composition, thus altering ecosystem energy transfer to higher trophic levels. In experiments described in chapters 2 and 3 of this dissertation, C. sowerbii …
Gain And Loss Of Functional Locomotor Recovery Following Contusive Spinal Cord Injury In The Adult Rat., Krista Layne Caudle
Gain And Loss Of Functional Locomotor Recovery Following Contusive Spinal Cord Injury In The Adult Rat., Krista Layne Caudle
Electronic Theses and Dissertations
Activity-based rehabilitation in the form of overground or body weight-supported treadmill (BWST) locomotor step training has become the most widely accepted therapy translated from preclinical animal research to spinal cord injury (SCI) patients. However, locomotor training does not provide the level of functional locomotor recovery that animal models are interpreted to promise because preclinical studies have used complete spinal cord transections that do not sufficiently mimic the clinical presentation. Furthermore, animal models do not include the same standard of care, immobilization with stretch/range-ofmotion manual therapies, SCI patients receive. Therefore, we have developed an experimental animal model that includes aspects of …
Morphological Comparison Of Visual Pathway Projections To The Temporal Lobe From Cortical Area Vi And The Tectorecipient Zone Of The Pulvinar Nucleus In The Tree Shrew (Tupaia Belangeri)., Donna Dillihay
Electronic Theses and Dissertations
The secondary visual pathway, from the retina through the superior colliculus and pulvinar nucleus has been linked to spatial attention (Snow et aI., 2009; Arend et aI., 2008) movement planning and motor response to visual stimuli (Wilke et aI. 2010; Grieve et aI. 2000). The tree shrew temporal cortex receives input from the tecto-recipient pulvinar nucleus, composed of the dorsal (PD) and central (PC) subdivisions (Lyon et al. 2003a). We looked at the projections from this pathway to the temporal cortex and compared them to the VI projections to the temporal cortex in the tree shrew. Our focus was to …
From The "War On Poverty" To Reagan's "New Right," What's In A Name? : The Symbolic Significance Of The "Welfare Queen" In Politics And Public Discourse., Kem Roper
Electronic Theses and Dissertations
This dissertation is a rhetorical analysis of the political discourse surrounding the role of poor African American women within the American social and political economy beginning in 1965 with Lyndon Johnson's War on Poverty initiatives and extending to the early 1980s with Ronald Reagan and the "religious right." I argue that an ideology of whiteness permeates both the Johnson and Reagan administrations even though each worked towards different ends. In Chapter 1, I begin by discussing how America's establishment as a capitalist society made it a nation ill-fitted for government-funded social programs. In particular, I discuss the impact of distinctions …
Phenomenological Modeling Of Image Irradiance For Non-Lambertian Surfaces Under Natural Illumination., Shireen Y. Elhabian
Phenomenological Modeling Of Image Irradiance For Non-Lambertian Surfaces Under Natural Illumination., Shireen Y. Elhabian
Electronic Theses and Dissertations
Various vision tasks are usually confronted by appearance variations due to changes of illumination. For instance, in a recognition system, it has been shown that the variability in human face appearance is owed to changes to lighting conditions rather than person's identity. Theoretically, due to the arbitrariness of the lighting function, the space of all possible images of a fixed-pose object under all possible illumination conditions is infinite dimensional. Nonetheless, it has been proven that the set of images of a convex Lambertian surface under distant illumination lies near a low dimensional linear subspace. This result was also extended to …
A Submodular Optimization Framework For Never-Ending Learning : Semi-Supervised, Online, And Active Learning., Wael Emara
Electronic Theses and Dissertations
The revolution in information technology and the explosion in the use of computing devices in people's everyday activities has forever changed the perspective of the data mining and machine learning fields. The enormous amounts of easily accessible, information rich data is pushing the data analysis community in general towards a shift of paradigm. In the new paradigm, data comes in the form a stream of billions of records received everyday. The dynamic nature of the data and its sheer size makes it impossible to use the traditional notion of offline learning where the whole data is accessible at any time …
The Role Of Endogenous Bcl-Xl In Regulation Of Apoptotic Signaling Pathways., Colins Ogwandi Eno 1982-
The Role Of Endogenous Bcl-Xl In Regulation Of Apoptotic Signaling Pathways., Colins Ogwandi Eno 1982-
Electronic Theses and Dissertations
Bcl-2 proteins are major regulators of cellular responses to various apoptotic stimuli. Among them, overexpression of the anti-apoptotic BcI-2 protein BcI-xL modulates organelle-specific apoptotic pathways. To understand the mechanisms by which endogenous BcI-xL regulates apoptosis, mouse embryonic fibroblasts (MEFs) deficient in BcI-xL expression (Bcl-x-KO) was generated. Studies of BcI-xL exclusively targeted to an organelle in Bcl-x-KO MEFs indicate that the mitochondria- and ER-Iocalized BcI-xL play distinct roles in apoptosis resistance and Ca2+ homeostasis. Specifically, mitochondrial BcI-xL can regulate apoptosis independently of ER BcI-xL, and when localized exclusively at the ER, BcI-xL impinges on Ca2+ homeostasis but does not affect apoptosis …
The Art Of Natality : Virginia Woolf's And Kathe Kollwitz's Aesthetics Of Becoming., Jennifer Brooke Goldberg 1973-
The Art Of Natality : Virginia Woolf's And Kathe Kollwitz's Aesthetics Of Becoming., Jennifer Brooke Goldberg 1973-
Electronic Theses and Dissertations
Though Virginia Woolf’s and Kathe Kollwitz's personal histories and specific cultural circumstances were quite different, their aesthetics share fundamental qualities. This dissertation demonstrates that both artists affirm memory, the maternal, and creativity as coalescent, and through doing so assert a principle of connectivity that counters the turmoil of their times. Through this constellation, Woolf’s and Kollwitz's aesthetics exude faith in the continued viability of beauty and of possibility, faith that a commitment to becoming will undermine the sources of hopelessness that enshroud the modem world. Channeling their losses into their creative endeavors, Woolf and Kollwitz appropriated crises from their pasts …
Finding The Brutal Aesthetic., Marcy R. Werner
Finding The Brutal Aesthetic., Marcy R. Werner
Electronic Theses and Dissertations
This thesis project documents the curatorial and archival work completed using the collection of photographs, negatives, and ephemeral materials of John Ranard. This collection belongs to his estate and is currently housed at the University of Louisville. Mounting an exhibit, processing the collection, and constructing a finding aid were parts of this project. Approaching the materials with a curatorial mindset informed the arrangement of the collection, one that compliments potential future curatorial endeavors with the collection.
Iron Acquisition By The Dental Pathogen Aggregatibacter Actinomycetemcomitans., Porscha Larai Jefferson 1986-
Iron Acquisition By The Dental Pathogen Aggregatibacter Actinomycetemcomitans., Porscha Larai Jefferson 1986-
Electronic Theses and Dissertations
The dental pathogen A. actinomycetemcomitans, a Gram- negative organism, has been associated with aggressive forms of periodontitis. A. actinomycetemcomitans requires iron to grow. In the host, iron-binding proteins such as transferrin, lactoferrin, hemoglobin, and ferritin, maintain a low free-iron concentration. Microorganisms, however, have evolved complex systems to efficiently harvest iron. The iron acquisition systems encoded in the genome of A. actinomycetemcomitans are likely tailored towards the specific survival strategies needed to survive in the oral biofilm. The objectives of this project were to determine the growth of A. actinomycetemcomitans in different iron sources and to examine the expression of the …
The Dynamic Equilibrium Of Human Telomeric G-Quadruplexes., Robert Buscaglia
The Dynamic Equilibrium Of Human Telomeric G-Quadruplexes., Robert Buscaglia
Electronic Theses and Dissertations
G-quadruplexes are thought to have biological importance, with studies based on small molecule interactions and quadruplex-interactive antibodies demonstrating their potential for formation in vivo. One potential biological function of quadruplex structures is the regulation and maintenance of telomeres. Telomeres are nucleoprotein complexes involved in chromosome stability. Human telomeres are composed of the repeated DNA sequence, 5'- d(TIAGGG), that terminates in a 3' single-stranded overhang. DNA sequences with homology to the human telomere are capable of quadruplex formation in vitro. Specifically, sequences containing four-guanine stretches (e.g. 5'-d(AGGG(TIAGGGb)) are capable of forming at least five distinct unimolecular structures. Which structure is favored …
Turkish Housing Policies : A Case Study On Mass Housing Provision In The Last Decade., Salih Ozgur Sarica 1983-
Turkish Housing Policies : A Case Study On Mass Housing Provision In The Last Decade., Salih Ozgur Sarica 1983-
Electronic Theses and Dissertations
Most industrial countries face with some form of housing problems. As a result, each state has adopted a variety of housing policies. Policy methods of government authorities in meeting the housing gap and addressing the low income families' housing needs differ from one country to another. In Turkey, the housing policies have not been effective to respond the housing needs of low- and middle-income families until the recent decades. Turkish Mass Housing Administration (TOKI), which was established in 1984, accelerated its mass housing provision in recent years. Through law amendments and administrative reforms in 2003 and 2004, TOKi as a …
Incorporating Nanomaterials With Mems Devices., Evgeniya V. Moiseeva 1980-
Incorporating Nanomaterials With Mems Devices., Evgeniya V. Moiseeva 1980-
Electronic Theses and Dissertations
This dissertation demonstrates an elegant method, known as 'micro-origami' or strain architecture to design and fabricate three-dimensional MEMS structures which are assembled using actuation of a metal-oxide bilayer with conventional planar lithography. Folding allows creating complex, robust, three-dimensional shapes from two-dimensional material simply by choosing folds in the right order and orientation, small disturbances of the initial shape may also be used to produce different final shapes. These are referred to as "pop-up structures" in this work. The scope of this work presented the deposition of colloidal gold nanoparticles (GNPs) into conformal thin films using a microstenciling technique. Results illustrated …
Role Of Human Arylamine N-Acetyltransferase In Carcinogen Metabolism And Human Breast Cancer Progression., Carmine Simone Leggett
Role Of Human Arylamine N-Acetyltransferase In Carcinogen Metabolism And Human Breast Cancer Progression., Carmine Simone Leggett
Electronic Theses and Dissertations
Human arylamine N-acetyltransferase (NAT) is a phase II cytosolic enzyme that occurs as two isozymes, NAT1 and NAT2. This family of polymorphic enzymes catalyzes the detoxification and/or activation of many aromatic and heterocyclic amine drugs and carcinogens. These metabolism reactions can lead to detoxification of xenobiotics by N-acetylation, or bioactivation by O-acetylation which is preceded by cytochrome P450 (CYP) hydroxylation. This study evaluates the role of human arylamine N-acetyltransferase in carcinogen metabolism as it pertains to substrate selectivity, kinetic activity towards arylamine and alkylaniline substrates, and toxicological risk. Here we introduce the use of immortalized human fibroblasts (GM4429) to investigate …
Role Based Access Control And Authentication For Scada Field Devices Using A Dual Bloom Filter And Challenge-Response., Jacob Schreiver
Role Based Access Control And Authentication For Scada Field Devices Using A Dual Bloom Filter And Challenge-Response., Jacob Schreiver
Electronic Theses and Dissertations
Supervisory control and data acquisition (SCADA) systems are networked control systems used in many critical infrastructure areas such as power water and transportation. Many of these systems continue to use legacy field devices that lack cyber security features. The field device security preprocessor is a bump-in-the-wire security solution of legacy field devices. This thesis describes the design and analysis of a dual Bloom filter structure for use in a field device security preprocessor. A dual Bloom filter is a variant of the traditional Bloom filter, that performs role based access checks in O(1) time. It is shown this structure, which …
Intracellular Delivery Of Nanomaterials For Sub-Cellular Imaging And Tracking Of Biomolecules., Krishna Kiran Medepalli
Intracellular Delivery Of Nanomaterials For Sub-Cellular Imaging And Tracking Of Biomolecules., Krishna Kiran Medepalli
Electronic Theses and Dissertations
Nanomaterials have many intriguing applications in biology and medicine. Unique properties such as enhanced electrical properties, increased chemical reactivity and resistance to degradation, novel optical properties and comparable size to that of biological systems have led to their use in various biomedical applications. The most important applications of nanomaterials for medicine are in drug delivery and imaging. This research focuses on utilizing the biocompatibility of single walled Carbon nanotubes (SWCNTs) and optical properties colloidal quantum dots (QDs) for cellular drug delivery and imaging of biomolecules. The first part of this research deals with single walled carbon nanotubes which are excellent …
Mr Imaging Of Left-Ventricular Function : Novel Image Acquisition And Analysis Techniques., Hui Wang
Mr Imaging Of Left-Ventricular Function : Novel Image Acquisition And Analysis Techniques., Hui Wang
Electronic Theses and Dissertations
Many cardiac diseases, such as myocardial ischemia, secondary to coronary artery disease, may be identified and localized through the analysis of cardiac deformations. Early efforts for quantifying ventricular wall motion used surgical implantation and tracking of radiopaque markers with X-ray imaging in canine hearts [1]. Such techniques are invasive and affect the regional motion pattern of the ventricular wall during the marker tracking process and, clearly are not feasible clinically. Noninvasive imaging techniques are vital and have been widely applied to the clinic. MRI is a noninvasive imaging technique with the capability to monitor and assess the progression of cardiovascular …
Improved Fabrication And Modeling Of Piezoresistive Microcantilever Beams For Gas Detection And Sensing., Ni Wang
Electronic Theses and Dissertations
Symmetric piezoresistive microcantilever beams have been demonstrated in previous research to be capable of sensing the presence of surrounding gas. This occurs as the damping effect of the gas changes the beam resonance behavior. Device sensitivity has been increased dramatically after changing the symmetric beam base to an asymmetric beam base. This dissertation seeks to improve on beam fabrication and simplify the fabrication procedure compared to earlier approaches. By changing to a polymer mask and using new equipment, an entire wafer can be fabricated in far less time compared to the previous approach. While this new approach shows great promise, …
Ready Child, Ready School : Educator Perceptions Of Child And School Success Indicators And Ready School Practices., Annette W. Bridges 1953-
Ready Child, Ready School : Educator Perceptions Of Child And School Success Indicators And Ready School Practices., Annette W. Bridges 1953-
Electronic Theses and Dissertations
In this study, the researcher considered educator perceptions of child readiness for school and school readiness for children conceptualized within the central constructs of the ready child and the ready school. The skills and abilities that children bring to the school are equally as important as the services and supports that the school brings to the child. The researcher’s intention in conducting this study was to investigate whether the differences existed in perceptions about ready child and ready school indicators and the implementation of ready school practices between educators working in successful schools and educators working in less successful schools. …
Connected Matchings In Special Families Of Graphs., Christopher James Caragianis 1980-
Connected Matchings In Special Families Of Graphs., Christopher James Caragianis 1980-
Electronic Theses and Dissertations
A connected matching in a graph is a set of disjoint edges such that, for any pair of these edges, there is another edge of the graph incident to both of them. This dissertation investigates two problems related to finding large connected matchings in graphs. The first problem is motivated by a famous and still open conjecture made by Hadwiger stating that every k-chromatic graph contains a minor of the complete graph Kk . If true, Hadwiger's conjecture would imply that every graph G has a minor of the complete graph K n/a(C), where a(G) denotes the independence number of …
Combating The Sophomore Slump Through Peer-Mentoring Among African American Students At Predominantly White Institutions., Tiffany Christina Evans
Combating The Sophomore Slump Through Peer-Mentoring Among African American Students At Predominantly White Institutions., Tiffany Christina Evans
Electronic Theses and Dissertations
There is a plethora of research regarding the first year undergraduate student experience; however, 2nd year students are facing adversity and consequently high rates of attrition. This phenomenon is known as the sophomore slump. There is limited research of how the sophomore slump impacts African Americans and research supports involvement, particularly as a peer mentor, increases student persistence beyond the 2nd year. This study uses Tinto's theory of student departure and Collin's theory of other-mothering to explore how the academic and social skills of CONECT peer mentors contribute to their experiences as peer mentors and their overall persistence.
The Use Of Mathematical And Computational Models To Define The Role Of Mutation And Infection In Colorectal Cancer., Chandler D. Gatenbee 1982-
The Use Of Mathematical And Computational Models To Define The Role Of Mutation And Infection In Colorectal Cancer., Chandler D. Gatenbee 1982-
Electronic Theses and Dissertations
Research over the past twenty five years has led to the development of the hypothesis that colorectal cancer is caused by the accumulation of mutations in tumor suppressor genes and proto-oncogenes. The last ten years has also revealed that the common JC Virus (JCV) is frequently found in colorectal tumors. This has led to the hypothesis that the virus, which is known to cause tumors in the lab, may playa role in colorectal cancer. However, the presence of JCV in colorectal tumors does not necessarily indicate a cause-effect relationship. Unlike in vivo and in vitro studies, mathematical and computational modeling …