Digital Commons Network^™

Blackting: The Inseparable Act Of Being Black And Acting: For The Magical Negro, Austin Dean Ashford

Graduate Theses and Dissertations

I am honored to present my Thesis for my M.F.A. in Theatre, in the form of a multidimensional project, drawing inspiration from the structure of Moby Dick by Herman Melville. As an undergraduate, the structure of Moby Dick intrigued me as it defies the form we call “a novel.” The book includes traditional prose, an entire play, verses of poetry, and even an essay. The structure of Moby Dick further influenced my love for Speech and Debate, especially around the event of Program Oral Interpretation (POI). POI places multiple genres of literature in conversation with each other and centers them …

Westward Empire: George Berkeley’S ‘Verses On The Prospect Of Planting Of Arts’ In American Art And Cultural History, Elizabeth Kiszonas

Graduate Theses and Dissertations

This study investigates the extraordinary half-life of a single line of poetry: “Westward the Course of Empire takes its Way…”. Beginning with their composition in 1726 by the Irish- Anglican bishop George Berkeley, these words colonized an enormous swath of cultural landscape over nearly two centuries. Immortalized in newsprint, broadsides, statesmen’s speeches, reading primers, geographies, the first scholarly history of the United States, as well as in poetry, paintings, lithographs, and photographs, the words evolved from an old-world vision of prophetic empire into a nationalist slogan of manifest destiny. Following the poem as it threads through literary and visual culture, …

The Effect Of Prescribed Burning On Wood-Decay Fungi In The Forests Of Northwest Arkansas, Nawaf Ibrahim Alshammari

Graduate Theses and Dissertations

Prescribed burning is defined as the process of the planned application of fire to a predetermined area under specific environmental conditions in order to achieve a desired outcome such as land management. This project used both morphological and molecular methods to identify and characterize the wood-decay fungi associated with the forests of northwest Arkansas—Pea Ridge National Military Park, Devil’s Den State Park, and the Buffalo National River—through frequent visits made between February 2018 and February 2019. In addition, in order to assess the effects of prescribed burning, incubation chambers were used to compare the growth of fungi from both unburned …

Prediction And Evaluation Of Breast Myopathy, Barbara De Almeida Mallmann

Graduate Theses and Dissertations

Broiler breast myopathies, including woody breast, white striping, and spaghetti breast, negatively impact the industry. Therefore, evaluation, prediction, and frequency of these muscle abnormalities on modern birds are important for decision making. Modern broilers are not highly active and often sit with the breast of the bird resting on the floor. Therefore, the first experiment was to promote bird movement and explore the impact on the breast myopathies. The movement was stimulated by human interaction (walking through pen) and higher light intensity so that birds walked around the pen more often throughout the day. The control group had normal low …

Investigation Of Microbiota In Health And Disease Of Poultry, Bishnu Adhikari

Graduate Theses and Dissertations

The microbiotas play vital roles in health and diseases of both humans and animals. 16S rRNA genes sequence analysis is one of the most popular and commonly used methods in the analysis of microbiotas associated with hosts. In this dissertation, the microbiotas of chickens (broilers, breeders, and layers) and turkeys were evaluated by 16S rRNA gene sequencing. Characterization of the culturable subpopulations of Lactobacillus in the chicken gut can serve as a valuable resource for probiotic development. In Chapter 2, Lactobacillus subpopulations recovered on MRS from chicken gut were defined comprehensively for the first time using 16S rRNA gene profiling, …

Extending The Boundaries Of Supply Chain Transparency: Supplier Monitoring Activity Disclosure, Consumer Evaluations, And Brand Equity, Yanji Duan

Graduate Theses and Dissertations

Socially responsible policy makers and consumers are pressuring firms to make their supply chains more transparent by disclosing information about their supplier monitoring activities (SMA). Yet, high monitoring costs and the complexity of supply chains pose challenges for firms to effectively monitor their extended supply chain, including both first-tier and lower-tier suppliers. In order to comprehensively evaluate the net benefit from SMA, it is therefore critical to consider potential effects on drivers of additional revenues that may accrue from the disclosure of SMA to consumers.

Prior research on SMA has examined the associated cost, risk, and supplier relational implications on …

Impact Of Excitation-Inhibition Balance/Imbalance On Dynamics Of Cortical Neural Networks, Vidit Agrawal

Graduate Theses and Dissertations

The purpose of this research is to study the implications of Excitation/Inhibition balance and imbalance on the dynamics of ongoing (spontaneous) neural activity in the cerebral cortex region of the brain.

The first research work addresses the question that why among the continuum of Excitation-Inhibition balance configurations, particular configuration should be favored? We calculate the entropy of neural network dynamics by studying an analytically tractable network of binary neurons. Our main result from this work is that the entropy maximizes at regime which is neither excitation-dominant nor inhibition-dominant but at the boundary of both. Along this boundary we see there …

"I Like . . . Red Bone:" Colorism, Rappers, And Black College Sorority Women At A Predominantly White Institution, Whitney Frierson

Graduate Theses and Dissertations

In this thesis, I examine black college sorority women’s views about skin tone bias in hip-hop culture. I conduct interviews with 12 black undergraduate women in Black Greek Letter Sororities at a predominantly white institution. Prior research finds that rap music sends skin color messages to adolescent women through lyrical content and music videos. I build on this work by exploring how the experiences of being in college shape black college sorority women’s views on skin tone bias and hip-hop. I find that time in college has been an important life stage in which black sorority women gained an increased …

Gender In Apocalyptic California: The Ecological Frontier, Marykate Eileen Messimer

Graduate Theses and Dissertations

Climate change is the consequence of ideologies that promote human reproduction and resource consumption by sacrificing human justice, nonhuman species, and the land. Both biology and queer ecologies resist this notion of human separation and supremacy by showing that no body is a singular, impermeable entity, that all beings are biologically and inexorably connected. My dissertation demonstrates that fiction writers use this knowledge to locate a utopian vision that can counteract the dystopian impotence of living within climate change. This argument is founded on novels written by women and set in California, a state that uniquely inhabits a utopian and …

Investigation Of The Effect Of Age On Regenerative Outcomes Following Treatment Of Volumetric Muscle Loss Injuries, John Taehwan Kim

Graduate Theses and Dissertations

Volumetric muscle loss (VML) is a traumatic injury in skeletal muscle resulting in the bulk loss of more than 20% of the muscle’s volume. Included in the bulk loss of muscle is the skeletal muscle niche comprised of nerve bundles, vasculature, local progenitor cells, basal lamina, and muscle fibers, overwhelming innate repair mechanisms. The hallmark of VML injury is the excessive accumulation of non-contractile, fibrotic tissue and permanent functional deficits. Though predominant in the younger demographic, the elderly population is also captured within VML injuries. There are many factors that change with aging in skeletal muscle that may further hinder …

Rescue And Reestablishment Of Chicken Models For Spontaneously Occurring Hashimoto’S Thyroiditis And Systemic Sclerosis/Scleroderma, Joseph Zolton Hiltz

Graduate Theses and Dissertations

The loss of biodiversity is a topic gaining popularity both in the political and scientific forums. Nearly 30 years ago researchers and politicians congregated in Rio de Janeiro (1992) to attend the first Earth Summit. It was the first meeting of its kind discussing the tangible pressing consequences of biodiversity loss as well as the potential long term ramifications. Many of the countries represented at this summit implemented short and long term plans in order to accurately measure losses of biodiversity as well as establishing organizations to help diagnose and remedy the current problems at hand. These new organizations and …

Mothers Of Intention: Women In The Ku Klux Klan And Massive Resistance, 1954-1968, Michele R. Johnson

Graduate Theses and Dissertations

This dissertation examines women in the Massive Resistance movement and the Ku Klux Klan of the classic Civil Rights period, 1954-1968. Specifically, it illustrates the way in which these women used their assigned gender roles as women, and specifically as mothers, to further white supremacist goals. White women have been an integral part of white supremacy in the United States from the beginning, yet are rarely portrayed as such. White supremacist movements are most often viewed through a male lens and gender in white supremacy is most often focused on how white men perform gender within the movements. While that …

Horse Racing During The Civil War: The Perseverance Of The Sport During A Time Of National Crisis, Danael Christian Suttle

Graduate Theses and Dissertations

Horse racing has a long and uninterrupted history in the United States. The historiography, however, maintains that horse racing went into hiatus during the Civil War. This simply is not true. While it is true that horse racing saw a decline in the beginning of the war, by the time the war ended, the sport had risen to similar heights as seen before the war. During the war, the sport was enjoyed by both soldiers and civilians. In the army, soldiers would often have impromptu camp races. As the war continued on, camp races became frowned upon by officers. The …

Selectivity Of Infrared Heat Treatment On Inactivation Of Mycotoxigenic Fungi On Stored Grain, Shantae A. Wilson

Graduate Theses and Dissertations

Selective Infrared (IR) heating holds great potential to decontaminate spores of unsafe fungi in corn. The objectives for this study were to investigate the impact of exposing corn to infrared energy at selected peak wavelengths (λ), infrared intensities and treatment durations, followed by tempering for further inactivation of microbes on the grain and explore a method for decontaminating Aspergillus flavus (A. flavus) spores on corn. Freshly harvested corn with initial moisture contents (IMCs) of 16%, 20%, and 24% wet basis (w.b.) were used. The corn samples were treated at different infrared wavelengths (3.2, 4.5, and 5.8 μm) for 20, 40 …

Communication Infrastructure Theory: A Rural Application, Callie S. Embry

Graduate Theses and Dissertations

The health of a community’s communication infrastructure influences their efficacy and efficiency in dealing with societal problems. The majority of previous communication infrastructure research has focused on multicultural urban centers. This study looks at the communication infrastructure of one rural Arkansas town, specifically looking for the places residents report as communication assets and the subjects discussed within the storytelling network. I used a combination of communication asset mapping and semi-structured interviews to identify the physical locations within the community where residents regularly converse with one another. The interviews along with observations also provided insight into the subject matter that residents …

Visualizing Ischemic Skin Flap Necrosis Through Phasor Analysis Of Autofluorescence Lifetime Images, Hallie Ramser Toomer

Graduate Theses and Dissertations

Necrotic skin flaps are difficult to predict and treat due to the lack of quantitative biomarkers. Label-free multiphoton microscopy is well suited for non-invasively monitoring skin metabolism through NAD(P)H and other intrinsic fluorophores, and offers immediate future directions for assessing necrosis in the clinic. The objective of this study was to assess whether phasor FLIM could be used to evaluate skin flap status and treatment efficacy in ex vivo skin sections. Phasor maps revealed differences in growth factor treatment and region, but changes in skin flap autofluorescence at 755nm excitation and 460nm emission were not just related to NAD(P)H. A …

The Functional And Structural Analysis Of Drosophila Robo2 In Axon Guidance, Lafreda Janae Howard

Graduate Theses and Dissertations

In animals with complex nervous systems such as mammals and insects, signaling pathways are responsible for guiding axons to their appropriate synaptic targets. Importantly, when this process is not successful during the development of an organism, outcomes include catastrophes such as human neurological diseases and disorders. It is vital to determine the underlying causes of such diseases by understanding the development of the nervous system. There are many pathways that have been identified to play a role in this, however, we lack an understanding of how these pathways can promote such diverse outcomes in different populations of neurons. These pathways …

Normative Pragmatic Selfhood: A Pragmatist Conception Of Value For Marginal Cases, Sam Noel Johnson

Graduate Theses and Dissertations

I develop a theory of personal ontology called normative pragmatic selfhood (NPS) to explain what persons are and how they are morally valuable. I also demonstrate the applicability of NPS theory by using it to assess the moral status of marginal cases in bioethical dilemmas. I begin by discussing the concept of intrinsic value and why it is problematic when it comes to persons. I then draw upon John Dewey’s theory of value, specifically the concept of growth, and Kant’s concept of humanity to show that persons are objectively yet extrinsically valuable. Next, I discuss and argue how the psychological …

Stable Isotope And Geochemical Characterization Of Nutrient Sources In The Big Creek Watershed Of Northwest Arkansas, Kelly Robin Sokolosky

Graduate Theses and Dissertations

The establishment of a concentrated animal-feeding operation (CAFO) in Newton County, Arkansas near Big Creek, a tributary of the Buffalo National River, has raised concern over potential degradation of water-quality in the watershed. In this study, isotopic tools were combined with standard geochemical approaches to characterize nutrient sources and dynamics in Big Creek. An isotopic and geochemical reference library of potential nutrient sources in the Big Creek watershed was established by direct sampling of representative potential sources, including septic-system effluent, poultry litter, swine and cattle manure, and CAFO waste lagoons. Representative nutrient sources and Big Creek stream samples were analyzed …

Technologies To Increase Animal Performance In Beef Production Systems, Caleb P. Weiss

Graduate Theses and Dissertations

Three monensin levels during a stocker phase (0, 800, 1600 g/ton in a free choice mineral) and two levels during finishing (0 [U] or 37.5 mg/kg diet DM [M]) were used to determine the effects of monensin supplementation during a stocker and subsequent finishing phase on beef calves. Steers (n = 605, BW = 278 ± 27 kg) were fed pearl millet hay with soybean hull and corn gluten feed supplement (0.5% BW daily [AF basis] Block 1) or grazed fall wheat (Block 2), spring wheat (Block 3), bermudagrass (Blocks 4 & 5) or wheat with mixed-grass baleage (Block 6). …

Potential Antimicrobials For Controlling Listeria Monocytogenes In Frankfurters, Aaron Rashad Bodie

Graduate Theses and Dissertations

Listeria monocytogenes is a pathogenic microorganism that causes Listeriosis. Listeriosis is a highly mortal disease with approximately 20% mortality rate. Listeria is psychrophilic, therefore it is able to survive in the refrigerator. This affects foods at cool storage such as fresh produce and RTE meats. To ensure the safety of RTE meat, post processing treatments are used such as vacuum packing, edible films, dip and treatment. One-way RTE can be treated is with the use of antimicrobials. However, in the past chemical substances were used. Currently, consumers want more natural and organic preservatives to combat health problems from toxic components …

Nesting Success Of Dickcissel (Spiza Americana) And Non-Breeding Grassland Bird Use Of Northwest Arkansas’ Remnant And Restored Tallgrass Prairies, Alyssa L. Derubeis

Graduate Theses and Dissertations

Dwindling populations of North American grassland birds are linked to habitat loss. Tallgrass prairie only covers 3% of its pre-settlement-era range. Small-scale restoration projects attempt to increase acreage for prairie avifauna, and while some breeding grassland species are present at these sites, nesting success and non-breeding use are still largely unknown. Both life history aspects are required for effective grassland bird conservation. My first objective was to access nest success of the Dickcissel (Spiza americana) at two remnant and two restored tallgrass prairies in Northwest Arkansas. From May-August 2017 and 2018, I found 114 nests that I monitored to determine …

Characterization Of The Swine Gut Microbiome Dynamics, Culturomics And Probiotics, Xiaofan Wang

Graduate Theses and Dissertations

The gastrointestinal tract is a critical place where the immune system concentrates many of its protective functions. It exerts both physical and biochemical defenses against invading foodborne pathogens and other hazards. In pigs, the gut microbiota community assembled postnatal plays a very important role in the development of multiple physiologic aspects, such as development of the gastrointestinal tract, nutrient exchange, immune defense against foreign pathogens and growth performance. Microbiome-host communication changes with age. Despite recent advances in understanding the swine gut microbiome at different growth stages, a comprehensive longitudinal study of the lifelong dynamics of the swine gut microbiome is …

Influences Of Autism Spectrum Disorder On Sensory And Emotional Responses To Smell And Taste Cues, Asmita Singh

Graduate Theses and Dissertations

Autism spectrum disorder (ASD) is a developmental disability that causes social, communication, behavioral and sensory challenges. The prevalence has been on a rise, with the latest reports stating 1 in 59 children is diagnosed with ASD. These challenges play a significant role in feeding behavior, leading to reduced nutrition among individuals. Much research in this field has been attributed to children, however, this study was focused on the adult population, in an attempt to improve their quality of life. Building on previous findings and knowledge gaps, the objectives of this thesis were two-fold: To better understand the sensory experiences of …

Tattoo Narratives And Counseling, Danny Lane Mccarty

Graduate Theses and Dissertations

Much research has been done on tattoos and on those who acquire them, but most of the research has focused on negative correlations that might exist with people who have tattoos. This current research, however, showed that people’s tattoo narratives can relate to how they view self, others, and the world, and to how they approach life. A narrative approach to qualitative research was used, and ten people participated in the study. Participants’ views of self, others, and the world were discussed as these views emerged from the narratives. Their possible approaches to life were also addressed. Themes that emerged …

Spirit Don't Ever Die: Apocalypse And Denial In An Infinite Universe, Nathan Riggs

Graduate Theses and Dissertations

In The Great Derangement, Amitav Ghosh catalogs contemporary fiction’s failure to adequately engage with catastrophic climate change. In this thesis, I argue the engagement problem has a century-old analogue in fiction’s approach to entropy. Entropy was among the first secular apocalyptic modes in mainstream discourse, and this investigation of authors’ approaches to its portrayal provides a model for understanding fiction’s denial or acceptance of apocalypse. I first examine William Hope Hodgson’s 1912 novel The Night Land, a far-future tale set in a post-solar Earth. I contend that Hodgson’s centering of the human experience prevents him from portraying a true end …

Archive And Repertoire Of The Esala Perahera Performance In Sri Lanka, Hashintha Jayasinghe

Graduate Theses and Dissertations

This project examines the archive and the repertoire of the Esala Perahera in Sri Lanka and charts the ideological and cultural implications of the performance. The archival analysis begins with the interrogation of the historical chronicles and the recorded history of the performance in the Sinhala and English texts. Thereafter, travel literature and the dissemination of cultural knowledge on the Perahera are discussed. The study of the repertoire and the photographic archive explores key performances in the Esala Perahera in 2016 and 2017. Postcolonial theory, theories on cultural anthropology, and performance theory are used to analyze the archive and the …

Impact Of Sanitizers On Salmonella Enterica Contamination And Microbial Populations Of Poultry Processing Reuse Water, Andrew Micciche

Graduate Theses and Dissertations

As human populations increase in numbers, access to clean, fresh water is becoming increasingly difficult to balance between agricultural and municipal demands. Water scarcity is a limiting factor of food production in many countries, whether they are emerging or established economies. In conventional poultry processing systems, access to water is particularly critical for the maintenance and disinfection of processing areas, as well as in processing operations such as scalding, chilling, and carcass washing. The need for sustainable alternatives to single-use water supplies is becoming increasingly more urgent, and as a result, the implementation of water reuse in poultry processing plants …

Bioengineering Extracellular Matrix Scaffolds For Volumetric Muscle Loss, Kevin Roberts

Graduate Theses and Dissertations

Volumetric muscle loss overwhelms skeletal muscle’s ordinarily capable regenerative machinery, resulting in fibrosis and severe functional deficits which have defied clinical repair strategies. My work spans the design and preclinical evaluation of implants intended to drive the cell community of injured muscle toward a regenerative state, as well as the development of an understanding of the molecular responses of this cell community to biomaterial interventions. I demonstrate a new class of biomaterial by leveraging the productive capacity of sacrificial hollow fiber membrane cell culture; I show specifically that unique threads of whole extracellular matrix can be isolated by solvent degradation …

The Functional Conservation Of Frazzled In Insects, Benjamin Wadsworth

Graduate Theses and Dissertations

Axons in the developing embryo receive and react to signals that direct their growth to reach target tissues at specified locations. The signal pathways that direct midline crossing of axons during embryonic development have been comprehensively examined in the past years using the Drosophila ventral nerve cord or the spinal cord as a model system. A number of these signaling mechanisms are conserved, however disparities have been found between species in general strategy or the molecular signals controlling the response of axons to guidance cues.

The Netrin-Frazzled pathway has been shown to aid in midline crossing of axons in the …