Digital Commons Network^™

Cost-Effective Prosthetic Hand Controlled By Emg, Mohammad Yahya Almuhanna

Electronic Theses and Dissertations

A cost-effective five-finger prosthetic hand is designed from aluminum, modeled and controlled using surface Electromyography (EMG) signals, which are obtained from the human body. Force sensors are used to control required forces needed to grasp and pick objects. A prototype hand is developed and it is experimentally tested to reproduce a wide spectrum of human hand motions. The size of the five-finger hand is similar to an adult male human hand, and it is capable of reproducing most of movements. Each finger has the same number of links as the real/human hand. Each finger also has a force sensor used …

C-Reactive Protein Interactions With Cellular Membranes And Supported Lipid Bilayers, Aml Abd Alhamed Alnaas

Electronic Theses and Dissertations

C-reactive protein (CRP) is a serum protein that binds to damaged membranes and initiates the complement immune response. Different forms of CRP are thought to alter how the body responds to inflammation and the degradation of foreign material. Despite knowing that a modified form of CRP(mCRP) binds to downstream protein binding partners better than the native pentameric form, the role of CRP conformation on lipid binding is yet unknown. In this work, three main assays were performed to characterize how conformation affects CRP-membrane interactions. The first assay utilized supported lipid bilayers that mimic the plasma membrane of apoptotic cells. The …

Middle School Noncognitive Development In A Sample Of Hispanic/Latino Youth, Jill E. Mcvey

Electronic Theses and Dissertations

This study examined the development of noncognitive skills in a sample of 4,769 Hispanic/Latino students as they went through middle school and the first year of high school using ACT Engage 6-9, an assessment designed to predict student outcomes by measuring students' behaviors and psychosocial attributes. The scales of Academic Discipline, Relationships with School Personnel, and Thinking before Acting were examined longitudinally through HLM analysis. The factors of gender and several indices of academic achievement were used to predict differences in students' starting scores and growth over time.

All factors related to academic achievement were significantly related to differences in …

A Descriptive Study Of The Effect Of Payer Source On Multiple Longitudinal Outcome Measures Within The Tbi Model Systems National Database Using Longitudinal Hlm Analyses, Melissa Carole Hofmann

Electronic Theses and Dissertations

Using longitudinal data from the TBIMS ND, this study utilized a longitudinal hierarchical linear modeling approach to describe the effect of primary payer source on individual level change in outcomes including the FIM and DRS. To facilitate the use of parametric statistics, Rasch-transformed FIM and DRS scores were utilized; thus approaching an interval level of measurement. The FIM was separated into 3 separate cognitive, mobility, and self-care subscales. In this way, rehabilitation professionals including speech, physical, and occupational therapists for this TBI sample could reference results to inform current clinical practice.

Results indicated that FIM and DRS trajectories were best …

Akratic Homo Economicus: Does The Neoclassical Economic Theory "Rational Agent" Assumption Accurately Depict Human Nature?, Marina Logachev

Electronic Theses and Dissertations

Neoclassical economic theory has long been scrutinized for its failure to be congruent with reality, often lacking generality and tractability due to, what many critics argue to be, unrealistic assumptions. One of the theory's core suppositions is a representative "rational agent" or homo economicus, whose self-interest and optimal choices, which are in state of equilibrium and efficiency are rooted in utility maximization of his well-being. Even though neoclassical economics claims to accurately depict human nature, from its very inception it has failed to incorporate human psychology and sociology into its foundations. As the behavioral and biological research became more …

Impact Of Light Pollution On Species Interactions, Kylee Grenis

Electronic Theses and Dissertations

Over half of the world's population lives in urban areas leading to night skies that are substantially degraded by artificial lights. Yet, we know little about how light pollution affects the surrounding natural communities. What we do know focuses on the impact of light pollution on individual species. Therefore, I investigated the impact of light pollution on species interactions. I determined whether light pollution is a mechanism of community change, evaluated whether there were changes in species interactions between predators and prey, and indirect and direct interactions between insect herbivores and their host plants by examining the entire life cycle …

The Roles Of Perceived Subjective Norms And Anticipated Sexism In Women's Intentions To Pursue A Career In Transportation, Elizabeth Colbert Johnson

Electronic Theses and Dissertations

The intention of this study was to better understand the significant underrepresentation of women in the transportation industry. The present study examined the relationships between female high school students' anticipation of a sexist workplace climate in transportation workplaces, perceived subjective norms about transportation work, and intentions to pursue a career in the transportation industry, using the Theory of Reasoned Action (TRA). A sample (N = 132) of female high school students completed measures of anticipated sexism in transportation careers, perceived subjective norms, and transportation career intentions. Results of a regression analysis indicated that higher perceived subjective norms were a …

An Introduction To The Psychedelic Pastoral: Tracing Mind-Altering Plant Life Into The Modern Industrialized West, Amy Nicole Buck

Electronic Theses and Dissertations

My Masters thesis offers literary pastoralism as a viable entry into the conversation on psychedelic plants and their use in mind-alteration by the industrialized West. I will, first, establish that the ancient pastoral tradition can be related to the existence of psychedelic plants, and that the use of such plants has inspired a deeper communion with various levels of the natural world. Next, my analysis focuses on parallels between pastoral literature and accounts of psychedelic hallucinations, which are often comprised of ultra-pastoral visions of landscapes, arabesques, and even cosmic space. These similarities suggest that psychedelic plants initiate a peculiar and …

Same Same But Different: The Self-Portraiture Of A Vietnam War Adoptee And The Poststructural Language Of Alterity, Joie Norby Lê

Electronic Theses and Dissertations

This study examines the journey of a Vietnam War adoptee and the multitude of experiences that influenced her alterity. Through the development of a poststructuralist conceptual framework, the author reveals a philosophy of difference realized by philosophers such as Michel Foucault, Gilles Deleuze, Jean-François Lyotard, and Jacques Derrida. Using the method of self-portraiture, the author illustrates how this philosophy of difference was shaped as a result of her experiences and how those experiences have informed her engagement or disengagement throughout her K-12 and post-secondary education, her work as a student, and her beliefs as an educator. The study focuses upon …

Source Apportionment Of Atmospheric Particulate Matter In Developing Countries Using Trace Elements And Stable Metal Isotope Ratios, Nitika Dewan

Electronic Theses and Dissertations

The work presented herein details the source apportionment of atmospheric particulate matter in developing countries (Kyrgyzstan in Central Asia, metropolitan cities in Northern India, and Shenzhen in China) using trace elements and stable metal isotope ratios. The first study focused on the development of a novel method for the concomitant separation of rare-earth elements in environmental samples of any geological origin. The separation procedure is based on three extraction chromatographic materials, referred to as Sr.Spec, TRU.Spec, and Ln.Spec. This triple column arrangement enables the simultaneous isolation of pure Sr and Nd fractions in less than one day and with great …

Key Components Of Successful Sexuality Education For High Functioning Students With Autism Spectrum Disorder, Brittany Sovran Greiert

Electronic Theses and Dissertations

To date, there is very little existing research on the sexuality education of high functioning adolescents with Autism Spectrum Disorder (ASD) even though current research suggests that 1 in 68 children are diagnosed with ASD (CDC, 2014). Through group consensus of experts in ASD representing families, school-based professionals, and researchers, this study aimed to reach an agreed upon understanding of the essential components necessary in teaching high functioning students with ASD about sexuality. Using the Delphi method, expert participants responded to three iterative questionnaires and provided their opinions and recommendations on the content, delivery, and responsibilities of schools and families …

Development Of Cognitive Vulnerability For Depression In Youth: Sex, Emotional Maltreatment, And Depression Predict Negative Cognitive Style, Jessica R. Technow

Electronic Theses and Dissertations

Hopelessness theory is a prominent cognitive theory of depression that has been shown to predict depression in youth. However, research has yet to elucidate normative mean-level development of the cognitive risk factor in hopelessness theory from childhood through adolescence. The current study utilized a multi-wave design and hierarchical linear modeling (HLM) analyses to examine mean-level negative cognitive style growth and stability in late childhood, early adolescence, and mid-late adolescence. Participant sex, emotional maltreatment, and major depression were also tested as predictors of negative cognitive style. For three years, youth (N = 681, ages 7-18 at baseline) were assessed every 1.5 …

Modeling And Simulation Of Optical Properties Of Noble Metals Triangular Nanoprisms, Soad Zahir Alsheheri

Electronic Theses and Dissertations

Gold and silver has gained huge attention across the scientific community for its applications arising from its plasmonic properties. The optical properties achieved by these materials via excitation of plasmons is very unique to these materials and used as diagnostic and therapeutic agents in the field of medicine, and as sensors in a gamut of disciplines such as energy and environmental protection to name a few. Surface plasmon resonance (SPR) properties of the gold and silver are size and shape dependent. Of the various shapes reported in literature, triangular nanoprisms has tunable optical properties in the visible and near IR …

Molecular Mechanisms Of Protein Thermal Stability, Lucas Sawle

Electronic Theses and Dissertations

Organisms that thrive under extreme conditions, such as high salt concentration, low pH, or high temperature, provide an opportunity to investigate the molecular and cellular strategies these organisms have adapted to survive in their harsh environments. Thermophilic proteins, those extracted from organisms that live at high temperature, maintain their structure and function at much higher temperatures compared to their mesophilic counterparts, found in organisms that live near room temperature. Thermophilic and mesophilic homolog protein pairs have identical functionality, and show a high degree of structural and sequential similarity, but differ significantly in their response to high temperature. Addressing the principles …

Panmixia Across The Range Of The Assortatively Mating Lesser Snow Goose, Brent B. Horowitz

Electronic Theses and Dissertations

The Lesser Snow Goose has been shown to exhibit imprinted positive assortative mating on the basis of its color phases, blue and white, and it has been proposed that the geographic cline of the color phases reflects a historic allopatry of the phases. Using ddRAD-seq, thousands of SNPs were analyzed in both phases and in colonies across the range of the species to examine genetic evidence for separation of the color phases or along the two migratory pathways, which have also been hypothesized to be separate. These analyses did not reveal any genetic differentiation between the color phases nor by …

Phenomenology And Blindness: Merleau-Ponty, Levinas, And An Alternative Metaphysical Vision, Jesse Younger Workman

Electronic Theses and Dissertations

This project addresses the problem of an "ocularcentric" bias in philosophy, with a focus on phenomenological and continental thought. Being a blind phenomenologist, I noticed an ocularcentric tendency dominating philosophers' perspectives, including their arguments, use of metaphors, and choices of examples. As a blind reader I found that such ocularcentrism prevented me from understanding their claims. This made me wonder whether ocularcentric biases might be leading them to unbalanced or invalid arguments and world-views. The questions raised are: Can there be philosophy that is not reliant on vision above all other senses? Is it possible for philosophy to not be …

Influence Of Self-Stigma, Distress Disclosure, And Self-Compassion On Post-Traumatic Stress Reactions In Deployment Veterans, June Marie Ashley

Electronic Theses and Dissertations

Military deployments can contribute to significant changes among the service members who experience them. Particularly regarding traumatic or highly stressful deployment experiences, the potential exists for posttraumatic stress reactions with both detrimental outcomes and beneficial influence. The present study explored this spectrum of reactions through the lenses of posttraumatic stress disorder (PTSD) and posttraumatic growth (PTG). Given the well-researched presence of stigma within military culture toward psychological distress, consideration was given to how stigma may influence severity of PTSD and degree of PTG. Rather than focusing on public stigma, the present study explored the possible influence of internalized stigma, known …

Identifying Spiritual Themes In Narratives Of Young Adults Who Have Aged Out Of Foster Care: A Qualitative Study, Kerri Jane Tokarski

Electronic Theses and Dissertations

Each year up to thirty thousand young adults age out of foster care in the United States. Historically research has focused on more tangible issues for this population (e.g., employment, education, etc.). Recent research addresses more intangible issues (e.g., quality of their relationships, resilience, etc.). This study reviews and then furthers such research by doing qualitative research to conduct nine loosely structured interviews with young adults who aged out of foster care to (1) discern if and how they made meaning of their experiences and (2) identify if there are spiritual themes within those narratives. This project used a qualitative …

Quinolines: Novel Synthesis And Derivatives Of Heterocyclic Bioactive Agents, Ginelle A. Ramann

Electronic Theses and Dissertations

Tuberculosis is a pulmonary disease that has ravaged the world throughout history. Even today, many developed and developing countries are experiencing this plight, made worse by the scourge of antibiotic-resistant bacteria.

Mycobacterium tuberculosis's class II fructose-1,6-bisphosphate aldolase presents an interesting target in the design of new therapies against this disease. Previous attempts to construct an inhibitor to this enzyme fell short due to poor selectivity or poor cellular uptake. However a new class of noncompetitive inhibitor based on 8-hydoxyquinoline-2-carboxylic acid presents a fresh approach. Preliminary studies indicate various modifications to this scaffold could be beneficial to its inhibitory efficacy.

Modifications …

The Stigma Effect: The Role Of Internalized Racism And Internalized Homophobia In Risky Sexual Behavior Among Black Gay Men, Darren Lovell Whitfield

Electronic Theses and Dissertations

Black gay, bisexual, queer, and same-gender-loving (GBQSGL) men account for less than 1% of US population, yet account for 36% of all new HIV infections. While, Black GBQSGL men experience higher rates of HIV infection compared to other gay, bisexual, and men who have sex with men (MSM) from other racial groups, they are no more likely to report engaging in condomless anal sex (CAS). These findings suggest that one possible explanation is that the context of sexual behavior for Black GBQSGL men may be riskier because of the prevalence of HIV in the community. Furthermore, research suggests that racism …

Ex-Vivo Slaughterhouse Porcine Crystalloid-Perfused Beating Heart Via Langendorff Method, Rahiemin Talukder

Electronic Theses and Dissertations

The objective of this study was to resuscitate isolated beating porcine hearts obtained from slaughterhouse swine for a minimum of 1 hour with a crystalloid buffer reperfusion instead of blood via an extracorporeal Langendorff apparatus. The isolated beating heart functions outside of the body under simulated physiologic conditions. Live functional anatomy was controlled under benchtop experimental settings. Porcine hearts (26 total) were topically cooled with saline. 300mL of 25°C cardioplegia with 20KU Streptokinase was preflushed via aortic root. WIT was less than 5 minutes. 1L 4°C cardioplegia was flushed antegrade with aortic cannula (Group 1) or coronary catheterization (Group 2). …

Crafted Places: The Use Of Place In Wisconsin Craft Beer Marketing, Joseph A. Quintana

Electronic Theses and Dissertations

This research examines place-related themes used in craft beer marketing initiatives in Wisconsin. "Place" describes the emotions and perceptions individuals hold in certain locations. Place theory, despite being universally experienced, is relatively understudied. Furthermore, this project is grounded in the recent neolocal movement - a movement towards local culture, and away from national homogenous culture. Broadly, this paper aims to understand the perceptual linkages between people and "their" place. In order to understand place and neolocal themes within these linkages, this project analyzes how individual beer names, beer-label imagery, and beer-related advertisements use familiar places to link products with a …

Indigenous Curation At The Denver Museum Of Nature And Science, Julia Marie Strunk

Electronic Theses and Dissertations

This thesis explores the questions of how and why indigenous curation is incorporated into collections care and management for American Indian sacred, ceremonial, and religious items at the Denver Museum of Nature and Science (DMNS) through the examination of staff discourse. This thesis also discusses the importance of incorporating non-Western ontologies and epistemologies into classically Western science and natural history museums, and how this helps reconcile differing collections care and management practices. Through the presentation and examination of data and literature, I argue that it is important to include indigenous curation in museums because it aids in cultural revitalization and …

Aging Assessment Of High Voltage Single Component Room Temperature Vulcanized Silicone Rubber (Rtv-1) Subjected To Aqueous Salt, Monika Bleszynski

Electronic Theses and Dissertations

Single component room temperature vulcanized (RTV-1) silicone based caulk used in high voltage insulators and other applications is frequently subjected to environmental pollutants. Aging of RTV-1 silicone rubber is the result of various stressors, including environmental aging conditions such as UV, acid, and salt exposure from ocean mist. Loss of hydrophobicity due to damage of the hydrophobic methyl groups, as well as loss of mechanical strength due to depolymerization via hydrolysis as a result of aqueous salt exposure were the two main factors of material aging assessed in this work. Multiple RTV-1 formulations were initially assessed for resistance to aging …

Creating Rhetorical Subjectivities: Negotiating The Precarity Of The Homo Oeconomicus In The Neoliberal Workplace, Leslie Lynne Rossman

Electronic Theses and Dissertations

The ubiquitous impact of the neoliberal economy on our everyday life leads to questions of rhetorical significance. This project strives to incorporate service labor experience as a source as well as an effect of rhetoric thereby embodying materialist notions of the body at the site of production. I explore neoliberal discourses through the phenomena of outsourcing and offshoring by interviewing service industry employees that have experienced job uncertainty within a Fortune 500 corporation. By studying narratives, this project explores how the material effects of rhetoric are able to determine discourses of power relating to production. Thus, this study questions the …

The Role Of P38 Mapk In Protein Homeostasis And Aging, Sarah Mae Ryan

Electronic Theses and Dissertations

Aging is characterized by a failure to maintain proper protein homeostasis, potentially leading to tissue dysfunction. Though a variety of genes have been found to regulate lifespan and age-related behaviors how these genetic factors contribute to protein homeostasis has not been fully explored. Here, we report that the evolutionarily conserved aging gene p38 MAPK (p38Kb) regulates age-dependent protein homeostasis. Over-expression of p38Kb results in reduced protein aggregation, while knockout of p38Kb leads to increased protein aggregation. Furthermore, we find that p38Kb regulates protein homeostasis, lifespan, and age-dependent locomotor functions through an interaction with the Chaperone Assisted Selective Autophagy complex; a …

The Neuroprotective And Therapeutic Effects Of Anthocyanins And Their Metabolites In Vitro And In A Mouse Model Of Amyotrophic Lateral Sclerosis, Aimee Nicole Winter

Electronic Theses and Dissertations

Anthocyanins, a unique class of flavonoid compounds, have recently come to the forefront of investigative research aimed at evaluating the potential applications of natural products to human health. Evidence demonstrating the beneficial effects of anthocyanin consumption has been reported for a myriad of conditions including cancer, cardiovascular disease, and lately, neurodegenerative disease. Neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS) are characterized by the death of specific neuronal populations within the brain and spinal cord, leading to cognitive and/or motor impairment. While the etiology of many of these diseases is largely unknown, several factors have …

Instructional School Gardens: Opportunities For And Barriers To Scaling, Patricia Sprague

Electronic Theses and Dissertations

When children are engaged in school gardens, they aren’t just digging in the dirt. School gardens have been shown to help improve student health by impacting food preferences and physical activity; to enhance learning in many subject areas; to encourage critical thinking skills by utilizing inquiry-based learning; and to engender a positive association with nature. Children from disadvantaged environments disproportionately may miss out on each of these important experiences. School gardens can serve as venues to enhance social justice by helping marginalized students access these advantageous experiences they otherwise might not have. Given the evidence that school gardens improve the …

Protein-Protein Interactions Of Human Mitochondrial Amidoxime-Reducing Component In Mammalian Cells, John Thomas

Electronic Theses and Dissertations

Newly discovered pterin-molybdoenzymes mammalian proteins, mARC1, and mARC2, are though to activate pro-drug, metabolize mutated base pairs, and producing nitric oxide from nitrite. However, the physiological function of the mARC proteins remain unclear. It is hypothesized that identifying partner proteins through protein-protein interactions can provide evidence to their physiological function. This study aimed to further investigate the potential function of mARC proteins through the identification of protein-protein interaction in human cell lysate, utilizing co-immunoprecipitation, crosslinking reagent, and pull-down assays. Several proteins (e.g. mitogen-activated protein kinase 5, phosphatidylinositol 4-phospahte 3-kinase C2 domain-containing subunit beta, ADP/ATP translocase 1, and myotubularin) were identified …

The Moderating Role Of Body Appreciation On The Feminine Ideology And Aggression, Julie Buzgon

Electronic Theses and Dissertations

This study sought to elucidate and expand upon the possible relationships and interactions between the feminine ideology, body appreciation, and indirect aggression reported within a sample of female adolescents. Social learning theorists posit that girls are socialized and reinforced to utilize more ‘feminine,’ or covert, means by which to express their aggression in comparison to their male peers. Girls are instructed from a young age to behave in a manner that is in accordance with the traditional feminine ideology. Additionally, today’s culture has placed unrealistic body standards on the female population, both overtly and tacitly critiquing adolescent girls if their …