Digital Commons Network^™

National Science Foundation Grant Implementation: Perceptions Of Teachers And Graduate Fellows In One School Regarding The Barriers And Successes, Sharon D. Pickering

Electronic Theses and Dissertations

The purpose of this qualitative case study was to examine the perceptions of partner teachers and graduate fellows in 1 school regarding the barriers and successes made during their participation in a National Science Foundation Grant. This study included 9 partner teachers and 7 graduate fellows who participated in the Science First! NSF GK-12 Grant. There were 16 participants in this study. This study was conducted at North Side Elementary and East Tennessee State University.

Partner teachers and graduate fellows were interviewed to gain perceptions of the barriers and successes of their participation in the implementation of the Science First! …

School Culture And Leadership: Teacher Perceptions Of Title I And Non-Title I Schools, Krista R. Crum

Electronic Theses and Dissertations

This study was conducted to see if teachers perceive a significant difference in school culture and leadership in Title I and non-Title I schools. Specifically, this researcher considered the possibility that teachers working in Title I schools have lower perceptions of their school’s culture and leadership than teachers working in non-Title I schools. A quantitative study was used to find the perceived differences between school culture and leadership in Title I and non-Title I schools. A quasi-experimental design was selected because preexisting data were collected on teachers in an upper East Tennessee region. The data were collected from the TELL …

Variations In Phenotypic Plasticity And Fluctuating Asymmetry Of Leaf Morphology Of Three Quercus (Oak) Species In Response To Environmental Factors, Joseph Kusi

Electronic Theses and Dissertations

Leaf morphology of Quercus (oak) species is highly variable and complicated confounded with phenotypic plasticity and fluctuating asymmetry (FA). However, the study of variation is mostly limited to leaf morphology. This study was extended to plasticity and FA variations in Q. alba (white oak), Q. palustris (pin oak), and Q. velutina (black oak). It was hypothesized that light exposure, individual trees, leaf position, and other leaf traits will influence variation in these species. Leaves were sampled from trees of these species and their morphological traits were measured. Absolute asymmetry of leaf width and area were determined and plasticity of each …

Fossil Trachemys (Testudines: Emydidae) From The Late Hemphillian Of Eastern Tennessee And Its Implications For The Evolution Of The Emydidae, Steven E. Jasinski

Electronic Theses and Dissertations

Trachemys (Testudines: Emydidae) represents one of the most well-known turtles today. The evolution of Trachemys, while being heavily documented with various fossil representatives, is not well understood. Numerous fossils from the Gray Fossil Site in northeastern Tennessee are helping to elucidate the taxon’s evolution. The fossil Trachemys at the Gray Fossil Site represent a new species. A review of previously named Trachemys taxa reveals that a huge majority of them are not valid or have been previously misinterpreted. A phylogenetic analysis preformed on modern emydids and supposed fossil representatives of those genera also shows the evolution of a portion …

An Assessment Of Relationship Quality Between Forest Service Land Managers And Volunteers, Jessica H. Evett

Electronic Theses and Dissertations

The relationship between Forest Service land managers and volunteers was studied quantitatively utilizing theoretical principles of relationship management theory and efficacy. 39 Forest Service employees completed quantitative surveys designed to compare within sample responses related to four volunteer partner types. Results showed measurable differences between mean scores for relationship quality and efficacy levels between partnership types selected as those land managers most liked and least liked working with. Partial support was found for the hypothesis stating that levels of relationship quality would predict willingness to recruit and work with volunteers, and partial support was also found for the hypothesis stating …

A Comparison Between Male Perpetrators Of Intimate Partner Violence And Child Sexual Abuse: A Feminist Perspective, Christelle Schafer

Electronic Theses and Dissertations

The purpose of this study was to explore whether attributes of sex role identity and gender role stress differed between perpetrators of child sexual abuse (CSA) and perpetrators of intimate partner violence (IPV). The primary research question posed in the research sought to determine if participants’ attitudes on gender role stereotyping or gender role stress were significantly different between perpetrators of CSA and perpetrators of IPV. Participants in this study were a convenience sample of adult males with histories of CSA and IPV from two different outpatient counseling programs. Participants completed the Bem Sex Role Inventory-Short Form (BSRI-SF) and the …

Cholera Toxin Activates The Unfolded Protein Response Through An Adenylate Cyclase-Independent Mechanism, Neyda Vanbennekom

Electronic Theses and Dissertations

Cholera toxin (CT) is a bacterial protein toxin responsible for the gastrointestinal disease known as cholera. CT stimulates its own entry into intestinal cells after binding to cell surface receptors. Once internalized, CT is delivered via vesicle-mediated transport to the endoplasmic reticulum (ER), where the CTA1 subunit dissociates from the rest of the toxin and is exported (or translocated) into the cytosol. CTA1 translocates from the ER lumen into the host cytosol by exploiting a host quality control mechanism called ER-associated degradation (ERAD) that facilitates the translocation of misfolded proteins into the cytosol for degradation. Cytosolic CTA1, however, escapes this …

Femtosecond Filament Interaction As A Probe For Molecular Alignment, Erik Mckee

Electronic Theses and Dissertations

Femtosecond laser filamentation is a highly nonlinear propagation mode. When a laser pulse propagates with a peak power exceeding a critical value Pcr (5 GW at 800 nm in air), the Kerr effect tends to collapse the beam until the intensity is high enough to ionize the medium, giving rise to plasma defocusing. A dynamic competition between these two effects takes place leaving a thin and weakly ionized plasma channel in the trail of the pulse. When an ultrafast laser pulse interacts with molecules, it will align them, spinning them about their axis of polarization. As the quantum rotational wave …

Bone Morphogenetic Protein-7 Attenuates Inflammation And Apoptosis And Improves Cardiac Function In Diabetes, Princess Urbina

Electronic Theses and Dissertations

Bone Morphogenetic Protein-7 (BMP-7) belongs to the transforming growth factor-β (TGFβ) family of cytokines has is known to have potent anti-inflammatory properties. It has been used in patients to treat osteoporosis clinically and has been reported to treat diabetic nephropathy in murine models. Moreover, studies show that inflammation is up-regulated in patients with pre-diabetes (PD). We, therefore, hypothesize that the administration of BMP-7 will attenuate inflammation in the heart of Streptozotocin (STZ)-induced PD mice. In this study, we divided C57Bl/6 mice into three groups: CONTROL, PD, and PD+BMP-7. CONTROL mice received intraperitoneal (i.p.) injections of Sodium Citrate Buffer while PD …

The Hybrid Spirit Animating Chinese Pentecostals In Malaysia, Eu Kit Lim

Electronic Theses and Dissertations

This dissertation interrogates the assertion in postcolonial scholarship, especially from the work of Homi Bhabha that the construction and performance of hybrid identities act as a form of resistance for marginalized communities against structures of oppression. While this study supports this assertion, it also critiques how hybridity fails to address issues of unequal power relations. This has led to an uncritical use of hybridity that reproduces the very idea of static identity which its proponents claim to transcend.

Through qualitative study of Chinese members of a Pentecostal church in Malaysia, this study argues that church members engage in "unequal belonging" …

Native Grass And Forb Establishment In Post-Agricultural Soil, Courtney D. Hall

Electronic Theses and Dissertations

Restoration of degraded and abandoned agricultural land in arid and semiarid climates is a global problem. The erratic patterns of precipitation these lands experience makes restoration of a plant community difficult. Application of supplemental irrigation and inoculation with arbuscular mycorrhizal fungi (AMF) are two restoration techniques that have been suggested to overcome deficits in natural precipitation. The effects and the interactions of irrigation and seeding date on the ground cover of intended species and unintended exotic species were tested in a post-agricultural restoration experiment in south-central Colorado, USA. The greatest ground cover of intended species and lowest ground cover of …

Attrition In A Telephonic Intervention Program For Depressed, Low-Income Patients In A Primary Care Setting, Benjamin C. Salazar

Electronic Theses and Dissertations

Telemental health interventions are currently being implemented in primary care settings in order to reduce the cost of providing treatment and increase access to services of underserved groups. Studies of the efficacy of telemental health interventions have generally demonstrated high rates of attrition. Eysenbach (2005) suggested that the reality of high attrition rates in telemental health studies prompts further investigation into the factors related to attrition. Such research should focus on identifying the characteristics of clients who drop out of treatment and at what points such clients are likely to drop out. The purpose of this study was to identify …

Evolution Of Melanocortin-2 Receptor Activations: Studies On A Mammal And A Fish, Liang Liang

Electronic Theses and Dissertations

The structure and function relationship between melanocortin-2 receptor (MC2R) and ACTH are the most complicated in melanocortin receptor gene family. A comparative study on the activation of human and rainbow trout MC2R will provide a useful model system for understanding how ACTH emerged as the sole ligand for the MC2R of bony vertebrates. This dissertation will discuss how studies utilizing analogs of hACTH(1-24) have revealed two critical amino acid motifs in this ligand (HFRW and KKRRP) which are required for the activation of MC2R. In addition, the KKRRP motif functioned as the unique binding site for MC2R that directly contributes …

Modeling Hrtf For Sound Localization In Normal Listeners And Bilateral Cochlear Implant Users, Douglas A. Miller

Electronic Theses and Dissertations

Mathematical models can be very useful for understanding complicated systems and for testing algorithms through simulation that would be difficult or expensive to implement. This dissertation presents a model that attempts to simulate the sound localization performance of persons using bilateral cochlear implants. The expectation is that this model could prove to be a useful tool in developing new signal processing algorithms for neural encoding strategies.

The head related transfer function (HRTF) is a critical component of this model, and in the ideal case, provides the base characteristics of head shadow, torso and pinna effects. This defines the temporal, intensity …

Adolescent Substance Abuse Treatment: Does Family Systems Therapy Improve Family Functioning And Decrease Drug Use?, Darin J. Wallis

Electronic Theses and Dissertations

Family systems therapy is a way of working with individuals, couples, families, or a group of people that emphasizes relationships and a person's/family's greater "system" as important factors in establishing change and health (Haley, 1976; Minuchin, 1974). Treating adolescent substance abuse with family systems therapy has been demonstrated in the literature as being an effective method of intervention (Coatsworth, Santisteban, McBride, & Szapocznik, 2001; Kumfer & Alvarado, 2003; Leichtling, Gabriel, Lewis & Vander Ley, 2006; Liddle, 2002; Liddle et al., 2001; Rowe & Liddle, 2003), as the various ecological and epidemiological factors associated with adolescent substance abuse can be addressed …

Mathematical Modeling And Analysis Of Asthma Stability And Severity, Arezoo Hanifi

Electronic Theses and Dissertations

Asthma is one of the most common chronic conditions in the United States. Asthma affects about one in fifteen people. It affects children more than adults and blacks more than whites. People with asthma experience attacks of wheezing, breathlessness, chest tightness, and coughing. Asthma can be fatal and the costs for the disease (direct and indirect) are approximated to be tens of billions of dollars each year.

There is no cure for asthma. However; for most people if asthma is controlled well they can lead normal, active lives. Therefore asthma controllability is a main factor in clinical practice. In order …

Regulation Of Actin Dynamics During Drosophila Germband Extension, Ashley M. Motlong

Electronic Theses and Dissertations

Convergent extension is a process that occurs in the development of a wide variety of organisms, including gastrulation in the Drosophila embryo to begin to lay out the adult body plan. In fly embryos, this is known as germband extension and is mainly driven by cell intercalation or neighbor exchange by planar polarized cell-cell interface contraction to shorten the tissue along the dorsal-ventral axis. In this thesis, I show that interface contraction consists of phases of fast interface shortening and intervals of stable interface size. My data also suggests that regulation of F-actin aggregates at these shrinking interfaces is important …

The Removal Of Pharmaceuticals From Wastewater By Wet-Air Oxidation, Miao Sun

Electronic Theses and Dissertations

The ubiquitous occurrence of pharmaceuticals and personal care products (PPCPs) in aquatic environments has raised concerns about potential adverse effects on aquatic ecology and human health. Certain pharmaceuticals have recently become a major focus of research to better understand the routes and persistence of these compounds once they enter into aquatic system.

In this research, two model compounds were selected to represent pharmaceuticals that have been identified by recent research as being persistent; specifically, these compounds were trimethoprim (TMP, a basic antibiotic) and gemfibrozil (GEM, an acidic lipid regulator). Treatment of synthetic wastewater that contained these drugs was accomplished using …

Fresh Squeezed: The Dilemma Of Local Food Production Along Colorado's Front Range Urban Corridor, Amanda Jessie Weaver

Electronic Theses and Dissertations

Today, the Front Range Urban Corridor of Colorado is one example from the urban/agricultural battlefield. The history of food production and urbanization in this area is similar to many regions throughout the western United States. Originally an extraction based economy, Colorado later became agriculturally/pastorally based, and more recently became a service-based, urban economy. On the Front Range Urban Corridor specifically, the urban core of Denver and Boulder developed with rich agricultural lands toward the northeast to Weld County along the northern border of the state. Though a semi-arid region, this agricultural zone produces a volume and variety of food-based crops …

The Case For Extending Patent Terms For Drugs That Treat Rare Diseases, Joanna Louise Thompson

Electronic Theses and Dissertations

This paper seeks to determine if extended patent terms can positively effect the production of drugs that treat rare diseases. It reviews the structure of the modern pharmaceutical company and considers the regulatory history that lead to this structure. The paper applies historically significant economic research in the field of patents and considers patent alternatives to establish the best method for incentivizing the development of these drugs. The paper finds that while there are numerous pitfalls and issues with the patent method, there are no viable alternatives. It also concludes that extending patent terms for drugs that treat rare diseases …

Relationship Adjustment In African American/White Interracial Couples, Elizabeth Rose Muino

Electronic Theses and Dissertations

Interracial intimate partnerships are at greater risk for relationship dissolution (i.e., divorce or permanent separation in cohabitating couples) than their endogamous counterparts (Bratter & King, 2008). However, a disparity in dissolution rates exists between African American male/White female pairings and African American female/White male pairings. This study sought to elucidate psychological variables that may be related to this sizable discrepancy. It was hypothesized that differences between these pairings exist with regard to color-blindness, empathy, sexism, and relationship adjustment. It was further hypothesized that color-blindness, empathy, and sexism, as controlled for by gender and race, would predict relationship adjustment.

Participants included …

Mental Health Literacy Of Latina Women In The United States For Their School-Aged Children, Annarheen S. Pineda

Electronic Theses and Dissertations

Despite known mental health (MH) disparities faced by Latino children relative to children from other minority groups of similar socioeconomic status (SES), little is known about how Latina mothers make MH decisions for their children. The present study examined links between Latina mothers' mental health literacy (MHL), including the recognition of and response to child psychiatric symptoms, and maternal acculturation factors as well as interpersonal violence (IPV) related symptomatology. Participants were 80 Latina mothers from Denver, Colorado and Modesto, California with at least one child between the ages of 8-12 years. Mothers were presented vignettes depicting child internalizing and externalizing …

Mitochondrial Glutathione Transport: Implications For Bcl-2 And Neuronal Survival, Heather Marie Wilkins

Electronic Theses and Dissertations

Oxidative stress is a contributing factor to many neurodegenerative diseases. In particular, mitochondria are a key source of oxidative stress due to electron leakage at the level of the electron transport chain. To combat the endogenous production of reactive oxygen and reactive nitrogen species mitochondria are equipped with several redox-cycling systems, such as glutathione (GSH). Mitochondrial GSH has been shown to be a critical reservoir of this antioxidant, where selective depletion of mitochondrial GSH can induce apoptosis in several systems. Many studies have intricately linked Bcl-2 to cellular GSH status and it has been previously shown that Bcl-2 is a …

Techno-Economic And Fluid Dynamics Analysis For Growing Microalgae With The Intent Of Producing Biofuel Using A System Model, Leah R. Raffaeli

Electronic Theses and Dissertations

Techno-economic and systems studies on microalgal growth scenarios to date are abbreviated and missing a number of important variables. By including these variables in a detailed model integrating biology, chemistry, engineering, and financial aspects, a more defined systems analysis is possible. Through optimizing the model productivity based on the resulting net profit, the system analysis results in a more accurate assessment of environmental and economic sustainability of specific algal growth scenarios. Photobioreactor algal growth scenario optimization in the system model has resulted in realistic engineering design requirements based on algal growth requirements and fluid dynamics analysis. Results show feasibility for …

Sense-Making Bodies: Feminist Materiality And Phenomenology In Constructive Body Theologies, Heike Peckruhn

Electronic Theses and Dissertations

Constructive body theology provides an ethical commitment to and a set of analytical principles for understanding bodily experience. If we insist upon the theological value of embodied experience, how can we give an adequate account of it? Are feminist appeals to the senses useful in developing theological truth claims based in embodied experiences? Feminist theologies which explicitly seek to overcome body/mind dualisms often reinscribe them when they neglect to attend to perception as a critical element of bodily experience. Phenomenological analyses of perception (such as suggested by Merleau-Ponty) strengthen and refine our conception of embodiment. Grounding constructive theology in experience …

X-Band Rapid-Scan Epr, Deborah Gale Mitchell

Electronic Theses and Dissertations

The advantages of rapid-scan EPR relative to CW and pulse techniques for samples with long longitudinal relaxation time T₁ (N_s⁰ defects in diamond, N@C₆₀, and amorphous hydrogenated silicon), heterogeneous samples (crystalline 1:1 α,γ-bisdiphenylene-β-phenylallyl (BDPA):benzene), lossy samples (aqueous nitroxyl radicals), and transient radicals (5-tert-butoxycarbonyl-5-methyl-1-pyrroline-N-oxide (BMPO)-superoxide adduct) were studied.

For samples with long relaxation times, CW (continuous wave) EPR is challenging due to power saturation and distortions from passage effects. In rapid-scan EPR, the field is swept through resonance in a time that is short relative to T₂. In rapid-scan EPR, the magnetic field is …

Seeded Propagation Of Tau Fibrils, Paul David Dinkel

Electronic Theses and Dissertations

In various neurodegenerative diseases, including Alzheimer's disease, progressive supranuclear palsy, Pick's disease, and corticobasal degeneration, the deposition of fibrils composed of misfolded tau protein is observed. Recent evidence suggests that tau fibrils transfer between cells and spread throughout the brain, underscoring the significance of fibril propagation.

Six tau isoforms exist in the adult human brain that can be grouped into 4-repeat (4R) tau and 3-repeat (3R) tau based on the presence or absence of the second of four microtubule binding repeats. We demonstrate in vitro that seeded fibril growth, a prerequisite for the spreading of the tau pathology, is crucially …

Longitudinal Interplay Of Dating Anxiety And Romantic Cognitions And Behaviors From Adolescence To Young Adulthood, Jessica K. Winkles

Electronic Theses and Dissertations

Dating is normative in adolescence and young adulthood, but can be disrupted and distressing to individuals experiencing dating anxiety. Cognitive-behavioral theories suggest dating anxiety impacts romantic cognitions and behaviors, and romantic cognitions and behaviors impact dating anxiety. Thus far, investigators have been unable to explore the interplay between dating anxiety and romantic cognitions and behaviors because studies are limited by cross-sectional designs. The present study examined longitudinal associations between two types of dating anxiety (dating interactions and active intentions for dating) and romantic appeal, jealousy, and compliance during conflict. Two hundred adolescents participated in the study, which began in the …

The Influence Of Gender And Alcohol Use On Depressive Symptoms Among Men And Women, Elizabeth Anne Peters

Electronic Theses and Dissertations

This study investigated the extent to which gender influences self-reported prototypical and masculine-specific symptoms of depression in men and women and whether or not alcohol mediates this relationship. Secondly, this study evaluated the effectiveness of the Denver Comprehensive Depression Inventory (DCDI), in measuring prototypical and masculine-specific depressive symptoms in clinical and non-clinical samples of men and women.

This paper summarizes the literature on gender differences in depression and the assessment of depression and gender, and outlines the current research on masculine-specific depression. It is argued that current assessment instruments identify prototypical symptoms of depression, as outlined in the DSM-IV-TR, but …

Isolation And Characterization Of A Full Length Retrotransposon: Cr1, Cassandra Michelle Weason

Electronic Theses and Dissertations

Transposable elements (TE) have been found in all genomes and have clearly had a major impact on genomic evolution. The described research takes advantage of an abundant transposable element present in the genomes of Anseriformes, called Chicken Repeat 1 (CR1). Previous studies in Anseriformes suggest that CR1 is presently active in recent evolutionary time (St. John, 2004). A fully functional CR1 element itself is approximately 4.5kb long (Kajikawa, 1997), where almost all inserts are truncated at the 5' end. Because of this, it has been a challenge to isolate a full length, active element. In this study, two CR1 sequences …