Digital Commons Network^™

Black Bears (Ursus Americanus) Versus Brown Bears (U. Arctos): Combining Morphometrics And Niche Modeling To Differentiate Species And Predict Distributions Through Time, Theron Michael Kantelis

Electronic Theses and Dissertations

Late Pleistocene American black bears (Ursus americanus) often overlap in size with Pleistocene brown bears (U. arctos), occasionally making them difficult to diagnose. Large U. americanus have previously been distinguished from U. arctos by the length of the upper second molar (M2). However, the teeth of fossil U. americanus sometimes overlap size with U. arctos. As such, there is need for a more accurate tool to distinguish the two species. Here, 2D geometric morphometrics is applied to the occlusal surface of the M2 to further assess the utility of this tooth for distinguishing U. americanus and …

A Distribution Of The First Order Statistic When The Sample Size Is Random, Vincent Z. Forgo Mr

Electronic Theses and Dissertations

Statistical distributions also known as probability distributions are used to model a random experiment. Probability distributions consist of probability density functions (pdf) and cumulative density functions (cdf). Probability distributions are widely used in the area of engineering, actuarial science, computer science, biological science, physics, and other applicable areas of study. Statistics are used to draw conclusions about the population through probability models. Sample statistics such as the minimum, first quartile, median, third quartile, and maximum, referred to as the five-number summary, are examples of order statistics. The minimum and maximum observations are important in extreme value theory. This paper will …

A-Type Lamins In Cell Cycle Regulation, Jaime L. Parman-Ryans

Electronic Theses and Dissertations

Proteins of the nuclear lamina provide structural support to the nuclear envelope and participate in a variety of cellular functions, such as chromatin organization and transcriptional regulation. One of these proteins, Lamin A (72kDa), is synthesized as a 74 kDa precursor protein, Prelamin A, which undergoes an unusual maturation pathway that requires two farnesylation-dependent endoproteolytic cleavages. The second cleavage is unique to lamin A in higher vertebrates and is specifically carried out by the endoprotease zmpste24. Although most previous studies have focused mainly on the function of mature Lamin A, recent evidence from our laboratory shows important biological functions for …

Role Of Nanoparticles In Voltammetric Signal Enhancement Exhibited By Layer-By-Layer (Lbl) Gold Nanoparticle-Modified Screen-Printed Carbon Electrodes (Spces), Ben K. Ahiadu

Electronic Theses and Dissertations

Screen-printed electrodes (SPEs) have found wide use as sensing platforms due to their simple fabrication, customizability in terms of geometry and composition, and relatively low cost of production. Nanoparticles have been incorporated in or interfaced with SPEs in order to improve sensor response or provide electrocatalytic capabilities. Though nanomaterial-modified SPEs are becoming increasingly common sensing platforms, the benefits provided by nanomaterials are often determined through voltammetric studies with common redox probes, such as ferricyanide. However, recent reports have documented the ferri-/ferrocyanide redox couple to be an unreliable system for characterizing some carbon-based electrodes due to the dependence of its electrochemical …

An Investigation Of The Relationship Between Child, Family, And Community Factors And Early Childhood Oral Health And The Utilization Of Dental Health Services, Nicole Holt

Electronic Theses and Dissertations

Background / Objective: Children under the age of 5 years bear a disproportionate burden of oral disease. The aim of this study is to investigate how child, family, and community determinants impact dental care utilization, and parental report of child’s oral health. Methods: Data for this study came from the 2011/2012 National Survey of Children’s Health for children aged 1 to 5 years old. Dependent variables evaluated were if the child had an oral health problem, been to a dentist in the past year, and parents description of the child’s teeth. Independent variables were selected from child, family, and community …

Symptoms Of Anxiety And Depression And Suicidal Behavior In College Students: Conditional Indirect Effects Of Non-Suicidal Self-Injury And Self-Compassion, Andrea R. Kaniuka

Electronic Theses and Dissertations

Young adults of college age are at particular risk for psychopathology, non-suicidal self-injury (NSSI) and consequent suicidal behavior, perhaps in a continuum of increasing severity. However, not all persons who experience psychopathological symptoms, or who self-harm, go on to engage in suicidal behavior, perhaps due to protective factors such as self-compassion that buffer this progression. We examined the mediating effect of NSSI on the relation between anxiety/depressive symptoms and suicide risk, and the moderating role of self-compassion on these linkages. Our collegiate sample (N=338) completed: Beck Depression Inventory, Beck Anxiety Inventory, Self-Harm Inventory, Suicidal Behavior Questionnaire-Revised, and the Self-Compassion Scale. …

Application Of Symplectic Integration On A Dynamical System, William Frazier

Electronic Theses and Dissertations

Molecular Dynamics (MD) is the numerical simulation of a large system of interacting molecules, and one of the key components of a MD simulation is the numerical estimation of the solutions to a system of nonlinear differential equations. Such systems are very sensitive to discretization and round-off error, and correspondingly, standard techniques such as Runge-Kutta methods can lead to poor results. However, MD systems are conservative, which means that we can use Hamiltonian mechanics and symplectic transformations (also known as canonical transformations) in analyzing and approximating solutions. This is standard in MD applications, leading to numerical techniques known as symplectic …

Evidence-Based Intervention That Decreases Stress Levels In Teens Who Are Missing School Due To Outside Stressors, Madysen Pennington

Electronic Theses and Dissertations

The purpose of this thesis is to test the effectiveness of an intervention designed to reduce

stress in adolescents. StressOFF Strategies program is the intervention used to educate students about stress and how to effectively manage it. A group of 8-10 students from Abilene High School was recruited to participate in the study during their one-hour lunch period. The tools used for the intervention included the StressOFF Strategies PowerPoint, the My Personal Stress Profile, and the Perceived Stress Scale. The findings are presented on individual graphs that show increases and decreases in stress levels for each student. Implications suggested are …

It’S About ‘That Time’ To Break The Cycle: A Rhetorical Analysis Of Challenging Menstrual Taboos, Audrey Marie Lamborn

Electronic Theses and Dissertations

Menstrual taboos exist around the world, and while new conversations are starting to address these issues, in many regions these taboos limit women’s daily lives and can even lead to serious health problems. Artifacts around the world are starting to emerge to challenge these preconceived notions and bring menstrual hygiene awareness as well as products to women in need. While the origination of the menstrual taboo is not clearly defined, various literature discusses both the cultural and religious origin and perpetuation of menstrual taboos. This thesis examines various artifacts found in the regions of the United States and the United …

Gender, Population Type, And Coping As Predictors Of Ptsd Symptom Severity, Stacey A. Kerr

Electronic Theses and Dissertations

Research has demonstrated that a salient predictor of PTSD is experiencing a traumatic event. Additional research has indicated that there are other risk factors involved with predicting the development of PTSD including gender, population type, and emotion-focused coping. The purpose of the current study was to examine gender, population type, the interaction effect between gender and population type, and emotion-focused coping, specifically avoidant emotional coping and active emotional coping, as independent predictors of PTSD symptom severity. In total, 124 individuals participated in the current study. The sample consisted of 64 civilians and 60 military personnel. The results indicated that gender …

Towards A Cost-Effective Biorefinery : Production Of Activated Carbons From Residual Biomass For Energy Storage Devices., Zachary Dean Herde

Electronic Theses and Dissertations

Biomass processing for industrial products and biofuels has gained an increasing presence as society looks to using sustainable resources for manufacturing and renewable fuels for energy. However, these sustainably produced materials and products cannot gain a competitive edge because of the manufacturing expenses that are a result of high process temperatures and pressures. In order to lower these costs, theoretical modeling has described a value-added co-product strategy as one of the best ways to combat high bioprocessing prices. Biomass has been shown to make effective carbons for energy storage devices such as supercapacitors and batteries. These carbons, with the right …

Fluorescence Lifetime Imaging And Spectroscopy Aided Tracking Of Zno And Cds:Mn/Zns/ N-Acetyl Cysteine (Nac) Quantum Dots In Citrus Plants, Torus Washington

Electronic Theses and Dissertations

In this thesis, we present an efficacious way of tracking nanoparticle movement in plant tissue through the use of fluorescence lifetime imaging (FLIM) and spectroscopy as well as a review of nanoparticle uptake in plants and the proposed mechanisms governing them. Given the increasing number of nanomaterials in agriculture and society as a whole, proper imaging tools and proactive measures must be taken to track nanoparticle movement in plant tissues and create infrastructure and products to keep things sustainable and safe. Herein we report a ZnO comparable nanoparticle— a CdS:Mn/ZnS/ N-acetyl cysteine (NAC) quantum dot— which boasts longer lifetimes and …

Because You Are Beautiful And Dead, Yvonne Amey

Electronic Theses and Dissertations

The poems in Because You Are Beautiful and Dead deal with dysfunctional people, substance abuse, loss, and death and dying. The poems also highlight the struggle of the poet/speaker finding her place in a hideous world, which, paradoxically, she really doesn't want to belong. The poems are influenced by the playful and sad imagery and subject matter of poet Matthew Dickman. These poems, like Dickman's, are assessable and quirky. Michael Earl Craig and Terrance Hayes are two other influences. Hayes' work is artistic and experimental. Michael Earl Craig's poems have a brilliance that isn't fueled in its complex or radical …

Mechanism Of Actin Bundle Assembly, Mechanics And Structure By Ion Interaction, Nicholas Castaneda

Electronic Theses and Dissertations

The assembly of actin filaments into bundles plays an essential role in mechanical strength and dynamic reorganization of cytoskeleton. Divalent counterions at high concentrations promote bundle formation through electrostatic attraction between charged filaments. Although it has been hypothesized that specific cation interactions may contribute to salt-induced bundling, molecular mechanisms of how salt modulates bundle assembly and mechanics are not well established. Here we determine the mechanical and dynamic properties of actin bundles with physiologically relevant cations. Using total internal reflection fluorescence (TIRF) microscopy, we measure the bending stiffness of actin bundles determined by persistence length analysis. We characterize real-time formation …

The Modern Church Communicates: Rhetoric And Hypertext In Church Website Design, Edward Palmer

Electronic Theses and Dissertations

The Internet and the World Wide Web have supplanted many paper-based information systems. People turn to the web to locate local services in the same way they find ecommerce sites such as Amazon. Churches of all sizes must develop effective and attractive websites to attract new members and inform existing members. These two groups form distinct audiences that must be correctly targeted by the website content. Other churches may visit to gather ideas for their programs; they are a third group of site visitors. Organization of hypertext on the web requires skills that are different than writing for print. Technical …

The Potential Of Green Care Interventions To Promote Positive Youth Development With A One Health Lens, Hagit Brandes

Electronic Theses and Dissertations

The first part of this study is making a conceptual tie between three distinct bodies of knowledge: Green Care, Positive Youth Development (PYD), and One Health. Green Care is an organizing construct for various interventions that use nature as a framework. I suggest that a nature-based program which incorporates Animal-assisted and horticulture interventions have the potential to promote positive youth developmental outcomes. The two major tenets of the PYD model are the mutually influential and bi-directional relationship between an individual and their context, and this relationship characteristic of plasticity, the potential for change (Lerner, 2006). Plasticity is viewed as an …

"The Sudden Thrill Of That Change": Framing George Eliot's Social Vision, Cyrus Seaberry Frost

Electronic Theses and Dissertations

Although scholarly commentary of the last decade has engaged more intensively than ever with the content of George Eliot's ideas concerning nineteenth-century British culture, the devices and techniques Eliot employs in the transmission of those ideas remain less explored. Consequently, room exists for a study as attentive to the formal characteristics of Eliot's messages as recent scholars have been to the content of those messages. This dissertation seeks to elucidate the ways in which specific formal techniques that characterize Eliot's fictional work evince her engagement with the thinking of social theorists, particularly Ludwig Feuerbach. The project contends that Eliot internalizes …

Points Of Leverage: Interrupting The Intergenerational Transmission Of Adversity, Lisa Schlueter

Electronic Theses and Dissertations

Early life stressors, such as abuse and neglect, have been associated with poor physical and mental health outcomes in adulthood. Moreover, animal models suggest that caregivers' early life stress can have intergenerational effects that then impact the health and well-being of their offspring. Although animal models are compelling, and inter-generationally transmitted and co-occurring risks are well-documented, proximal mechanistic explanations for how caregiver's history of childhood adversity can result in changes to their child's stress physiology and outcomes have not yet been systematically tested in humans. Thus, among a sample of low-income, predominantly Latino families participating in Early Head Start (EHS), …

Advancing Sylvia Wynter's Reimagination Of The Human And Counter-Poetics: A Critique Of Contemporary Western Science Discourse In Cosmos—A Spacetime Odyssey, With Host Neil Degrasse Tyson, Claire E. Slattery-Quintanilla

Electronic Theses and Dissertations

This thesis investigates the entanglements of "modernity/coloniality," Western conceptualizations of time and space, and questions of the "human" as they are situated in contemporary Western science discourse and thought. Through a textual analysis of the 2014 science television documentary series Cosmos: A Spacetime Odyssey presented by famous black astrophysicist Neil deGrasse Tyson, I argue Tyson refuses to discuss race as it relates to Western science on three levels in Cosmos: the racialized logic inherent in Western science, the sociohistorical relationship between European colonial racial subjugation and the emergence of contemporary Western science, and Tyson's experience as a black man …

Quantification Of Airborne Fungal Spores Comparing Molecular Tracers Via Ion Chromatography And Uv-Lif Methods, Marie Ila Gosselin

Electronic Theses and Dissertations

Fungal spores represent an understudied subcategory of bioaerosols that can impact human health as pathogenic and allergenic particles. Fungal spores also have been shown to act as effective ice nuclei and giant cloud condensation nuclei in some cases. This has implications on the hydrological cycle on local and regional scales by impacting the formation and evolution of clouds and precipitation. The quantification of fungal spores has been limited in the past due to methods that were costly and that suffered from poor time resolution. The most commonly applied methods for airborne fungal spore analysis have traditionally included microscopy and culturing, …

Catholic Girls All Grown Up: A Practical Theological Exploration Of Sexuality Formation In Young Adult Women, Emily Susanne Kahm

Electronic Theses and Dissertations

The Roman Catholic Church promotes exacting norms about the sexual behavior expected of Catholics, but prior qualitative and quantitative studies have shown a mixed effect on the decisions made by young adult Catholics, especially women. This qualitative study interviewed young adult women who were raised Catholic and sought to determine both what they were taught about sex and sexuality while growing up Catholic and how they think those teachings affected their lives and decision-making as young adults. Analysis of their responses indicated an anxious climate in their childhood educational experiences where adults were hesitant to answer questions or engage in …

Factor Invariance Of The Standard Achievement Admission Test By Gender And School Types, Mohammed Alqabbaa

Electronic Theses and Dissertations

This study examined the factorial structure of the SAAT with exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). Specifically, a CFA of a four-factor model (the hypothesized model) was tested to see if the model had good fit as well as a model generated from an EFA. The EFA showed that the SAAT test only measured two factors (biology and chemistry), not the four posited by the test developers. The CFA provided good fit to a two-factor model; however, a CFA showed that the hypothesized four-factor model also fit the data well and so the hypothesized model was selected …

Beyond The Legalization Of Marijuana: Economics Of Marijuana As A Drug And Herbal Supplement, Ryan T. Freer

Electronic Theses and Dissertations

Normative studies misunderstand a crucial aspect of cannabis legalization: they have not critically analyzed how the pharmaceutical industry might react when synthetic cannabinoid compounds could be incorporated into new products. I argue that when marijuana is federally legal, there will be two independent market developments in: i) the cannabis market, which includes botanic cannabis and herbal supplements sold in retail nutrition stores; and ii) the FDA-approved ethical drug market. How does the drug industry's monopolistic pricing structure lend itself to strategic pricing for these new synthetic cannabinoids? How much competition can we expect between dispensaries and nutrition shops selling herbal …

When Rhinos Are Sacred: Why Some Countries Control Poaching, Paul F. Tanghe

Electronic Theses and Dissertations

Why are some countries more effective than others at controlling rhino poaching? Rhinos are being poached to extinction throughout much of the world, yet some weak and poor countries have successfully controlled rhino poaching. This dissertation presents a theory accounting for divergent patterns in the control of rhino poaching, explaining why rhino poaching has been controlled in some countries yet increases exponentially in others. It does so by examining the relational models predominant in each country with wild rhino populations, including institutional analysis of all rhino range states, detailed analysis of social constructions used by nearly two hundred conservationists in …

3d Bioprinting Hydrogel For Tissue Engineering An Ascending Aortic Scaffold, Benjamin Stewart

Electronic Theses and Dissertations

The gold standard in 2016 for thoracic aortic grafts is Dacron^®, polyethylene terephthalate, due to the durability over time, the low immune response elicited and the propensity for endothelialization of the graft lumen over time. These synthetic grafts provide reliable materials that show remarkable long term patency. Despite the acceptable performance of Dacron^® grafts, it is noted that autographs still outperform other types of vascular grafts when available due to recognition of the host's cells and adaptive mechanical properties of a living graft. 3-D bioprinting patient-specific scaffolds for tissue engineering (TE) brings the benefits of non-degrading synthetic …

Mechanical Effects Of Surgical Adhesives On Ascending Thoracic Aortic Aneurysm Replacement, Dong Qiu

Electronic Theses and Dissertations

Ascending thoracic aortic aneurysm (aTAA) is a potentially lethal disease which grows gradually over time and may lead to aortic dissection and rupture. Currently, aTAA surgical repair using Dacron graft is a well-established treatment. In addition, surgical adhesives are frequently used in the surgeries to seal the anastomotic site. This study aims to investigate mechanical effects of four commonly used surgical adhesives, namely BioGlue, CoSeal, Crosseal, and Tisseel, on the suture site using in-vitro digital image correlation (DIC) method and finite element (FE) simulations in an ovine model. In this study, first, mechanical properties of ovine ascending aorta were obtained …

Warm Connections: An Integrated Behavioral Health Intervention Development Study, Susanne Klawetter

Electronic Theses and Dissertations

Research demonstrates the presence of maternal mental health disparities as well as barriers to quality behavioral health care among women with low socioeconomic status. Warm Connections represents an innovative, interdisciplinary intervention designed to improve access to timely behavioral health support for women with low socioeconomic status. Based on an infant mental health framework and drawing from integrated behavioral health and brief intervention approaches, Warm Connections addresses the psychosocial needs of participants in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC). The primary mission of WIC is to provide nutrition education, access to healthy nutrition, and health care …

"There Will Be More Cookies": A Discursive Exploration Of Polyamorous Identity In A Monogamous World, Stephanie K. Webb

Electronic Theses and Dissertations

Monogamous romantic relationships are the standard by which to engage in relationships in the United States. Despite the pervasiveness of monogamy, polyamorous romantic relationships are growing. Polyamory is an approach to romantic relationships that includes engaging sexually and emotionally with multiple people simultaneously, with the knowledge and consent of everyone involved (Polyamory, 2015). This study explores how individuals who identify as polyamorous construct personal and relational identities in a monogamous world. Using relational dialectics theory 2.0 and queer theory, the study examined self-recorded conversations of 21 polyamorous participants and their partner(s). Participant talk surrounding polyamorous personal and relational identity voiced …

Can You See Me? Ethnography Of Women's Experiences With Homelessness In Denver, Colorado, Taylor L. Morrison

Electronic Theses and Dissertations

Following the economic crisis in 2008, the United States, and Denver in particular, saw a considerable rise in the number of people considered homeless. Despite an increase in the population, little anthropological research has been done to understand the experiences of street-embodied individuals and the services available to them. Through participant-observation, life-history interviews, and photovoice, I closely studied the lives of two women experiencing homelessness and used interpretive phenomenological analysis to analyze the data. Analyzed through Foucault's biopolitics, technologies of the self, and panopticism, as well as Goffman's presentation of the self, I make the case that the homeless experience …

"Revolution In Religious Language": The Relevance Of Julia Kristeva's Theory Of 'Signifiance' For Theology, Timothy O. Inman

Electronic Theses and Dissertations

This dissertation applies Julia Kristeva's theory of revolution in the practice of signifiance to religious discourse. In particular, it argues that the salient features of signifiance are present and active in religious speech as well as poetic language, the subject of Kristeva's doctoral thesis Revolution in Poetic Language. Signifiance describes the process in which meaning is produced in linguistic utterance, and its intentional practice is subversive not only in terms of language but culture in general.