Digital Commons Network^™

Feasibility Of Using Oxide Thickness Measurements For Predicting Crack Growth Rates In P91 Steel Components, Ralph Edward Huneycutt Iv

Graduate Theses and Dissertations

There are only few methods available for predicting the age of cracks that are found in high

temperature structural components during service; among the promising ones is the oxide

thickness measurement technique. Oxide thickness profiles are taken from crack surfaces of

components and used for predicting the rates of crack propagation. This technique is particularly

suitable for high temperature components fabricated from ferritic steels commonly used in power

plants that run on fossil fuels. To implement this technique, it is necessary to fully understand the

kinetics of high temperature oxidation in these steels. In this study, the oxidation characteristics

of …

Dinner, Daniel Reuben Baskin

Graduate Theses and Dissertations

Dinner is an interactive exhibition which presents appropriated works of art collected and hung in a clustered salon style, as well as a fully realized recreation based on a 16th century Dutch banquet still-life, which presents guests with meats, cheeses, fruits, vegetables, breads, and wine to share and imbibe. Dining ware is provided for guests at the entrance to the exhibit, as are suggested topics of conversation, which are presented on slips of paper for guests to carry with them throughout their time in the space. Within the collection of wall-mounted works are references to ancient Greek and Roman marble …

"A Magic Deeper Still": Sacramental Poetics In William Wordsworth, Christina Rossetti, And C.S. Lewis, Eric Michael Bontempo

Graduate Theses and Dissertations

A sacramental poetics requires a particular mode of being-in-the-world. Religiously-minded poets, from Dante and Milton to Donne and Herbert, have long considered how the individual becomes attuned with creation and God’s will. But what happens when modernity and secularization challenge long-held assumptions about the universe and how humankind fits into it? A reevaluation is then needed. My thesis begins with an examination of how William Wordsworth, who sort of falls into modernity, seeks to reoccupy the functions of religion in an increasingly secularized landscape. One consequence of the European Enlightenment is the disentangling and distancing that occurs in regards to …

Strategies Of Reading As A Second Language Instruction Across Curriculum In Secondary Grades, Anisa A. Ben Idris

Graduate Theses and Dissertations

This study explored what themes of best practices teachers report using in real classrooms to teach reading skills to ESL students across curricula. It examined teachers’ applications of the following five themes in their instruction as a regular routine described as best practices in the literature for teaching diverse students: (1) providing comprehensible input, (2) teaching learning strategies of metacognition to bridge the gap between school literacy practices and home literacy practices (3) lowering the affective filter, (4) implementing formative assessment, and (5) cooperating between teachers and ESL facilitators. The study involved teachers from two high schools in one school …

Implementation Of A Standards-Based Grading Model: A Study Of Parent And Teacher Perceptions Of Success, Amber Dee Wheeler

Graduate Theses and Dissertations

The purpose of this study is to explore the perceptions of parents and teachers regarding the success of a standards-based grading initiative in meeting its goals. Furthermore, findings from this study will be used to inform decisions made in future grade level implementations. Standards-based grading meets all criteria for a problem of practice. The literature situates standards-based grading as a high impact strategy that can affect the entire system. This mixed-methods study will be used to determine practical changes for a school implementing standards-based grading. This study found parents positively responded to the change, and parents understood their child’s current …

Influence Of Stream Permanence, Predation, And Invasive Species On Crayfish In The Ozark Highlands With An Emphasis On Species Of Greatest Conservation Need (Orconectes Marchandi, Orconectes Eupunctus And Cambarus Hubbsi), Allyson Noelle Yarra

Graduate Theses and Dissertations

Due to the ecological importance of crayfish and the increasing vulnerability of freshwater systems due to habitat loss, invasive species, and hydrologic alteration, understanding crayfish-environment relationships is crucial in the context of aquatic species conservation. I sought to examine the influence of hydrologic variation among intermittent and permanent streams on crayfish occupancy, abundance, predation risk, and potential vulnerability to invasive species effects. I conducted crayfish and environmental data sampling during two consecutive summers across 20 Ozark streams of differing permanence levels (10 intermittent, 10 permanent). In these same streams, I conducted fish and scat surveys over the course of four …

The Quiet Discrimination Of Lowered Expectations: A Study On The Independent Living Needs Of Severely Disabled Individuals In Kansas, Joe Dalgarn

Graduate Theses and Dissertations

Increasing the independence of individuals with severe disabilities is of increasing concern to schools and federal agencies. Improving quality of life for high needs individuals with disabilities is an objective of transition programs, which allow consumers to adapt from one aspect of life to the next. The purpose of this study is to examine the relationships between variables (a) vocational assessment and exploration; (b) workplace readiness training; (c) independent living skills; and (d) self-advocacy and self-care and the independence level of individuals with severe disabilities residing and receiving their education within an institutionalized setting. Finally, this study will examine the …

Analyzing The Effects Of Preprimary Broadcast Media On Presidential Nominations From 1980-2016, Jarred Ralston Cuellar

Graduate Theses and Dissertations

This study attempts to discover if broadcast media released during the preprimary period has an effect on the Presidential nomination process, and if so in what way? Several OLS regression models, based on Randall Adkins and Andrew Dowdle’s Presidential nomination forecasting models, were created as an attempt to not only find a statistically significant effect between broadcast media and aggregate vote percentage, but also in an effort to create more effective forecasts. I have drawn my sample from every open nomination race dating back to 1980, and used both cable and network broadcasting sources. I have covered not only the …

An Exploration Of The Experience Of Open Awareness Co-Meditation At The Beginning Of Therapy Sessions, Aneeqa Ishtiaq

Graduate Theses and Dissertations

Mindfulness and meditation have been seen as beneficial for mental health and mindfulness-based therapies have proliferated alongside an increase in popular interest in mindfulness (Germer, Siegel, & Fulton, 2013). However, many therapists are unaware of how to add mindfulness-based interventions. It may seem especially ambiguous for therapists and clients unfamiliar with the concept. In this dissertation, the history and current research on mindfulness-based psychotherapy, and its benefits and contraindications, are reviewed, and the researcher’s relationship to the topic is explained. It is identified that one way to add mindfulness to psychotherapy is for the therapist and the client to co-meditate …

Linear Quadratic Optimal Control For A Cascaded Converters-Based Microgrid, Amlam Niragire

Graduate Theses and Dissertations

There is a constant transformation of the electric grid due to an ongoing interest in the deployment of renewable energy resources and electric microgrid formation. This transformation, though advantageous in many ways, poses great challenges for the energy industry and there must be a constant improvement in modeling, simulation, analysis and control techniques in order to characterize and optimize the system design and operation. In this light, the scope of this thesis is focused on developing a linear model, analyzing the stability and designing an optimal linear quadratic regulator (LQR) for a microgrid system. The microgrid system used is inspired …

Infrared Energy Conversion In Plasmonic Fields At Two-Dimensional Semiconductors, Gregory Thomas Forcherio

Graduate Theses and Dissertations

Conversion of infrared energy within plasmonic fields at two-dimensional, semiconductive transition metal dichalcogenides (TMD) through plasmonic hot electron transport and nonlinear frequency mixing has important implications in next-generation optoelectronics. Drude-Lorentz theory and approximate discrete dipole (DDA) solutions to Maxwell’s equations guided metal nanoantenna design towards strong infrared localized surface plasmon resonance (LSPR). Excitation and damping dynamics of LSPR in heterostructures of noble metal nanoantennas and molybdenum- or tungsten-disulfide (MoS2; WS2) monolayers were examined by parallel synthesis of (i) DDA electrodynamic simulations and (ii) near-field electron energy loss (EELS) and far-field optical transmission UV-vis spectroscopic measurements. Susceptibility to second-order nonlinear frequency …

Exploring The Impacts Of Study Abroad On Hospitality Student’S Perceptions Of Emotional Intelligence, Diversity And Sustainability, Jordan Glynn Griffin

Graduate Theses and Dissertations

This study investigated if there was a significant difference in hospitality students who did and did not participate in a study abroad program to determine if study abroad had an impact on their emotional intelligence, diversity, and sustainability awareness. The results of this study will assist both hospitality education and study abroad by providing information.

A descriptive, four-section survey was distributed online via Qualtrics utilizing snowball sampling. A total of 110 respondents participated in the study; 72 nonstudy abroad and 38 abroad. The respondents completed the questionnaire that measured emotional intelligence, career longevity, perceptions of diversity, sustainability awareness, and demographic …

Cultural Reimagining And Literary Voice: Southeastern Tribal Women Negotiate Cultural, Social, And Political Identity Through Literature, Linda Sue Shaffer

Graduate Theses and Dissertations

This dissertation examines literature written by women who identify with Native tribes that originally inhabited, and in some cases continue to inhabit, the southeastern area of what is now known as the United States. The analysis presented in each chapter applies tribally specific methods used for creating knowledge within the particular discourse community being represented through literature. The project also employs the perspectives of Native literary scholars to consider the ways in which the roles and lives of Native women have been influenced by Euro-American values and to analyze the ways in which these female authors engage literature as a …

On The Right Track: Exploring Influences Contributing To Successful Track-Switching Of Indians Working For A U.S. Company, Rose-Marie Speck

Graduate Theses and Dissertations

The purpose of this study was to explore how Indian managers assessed the influences leading to their transition from technician to manager when working for a company in the U.S. This study was based on interviews with fifteen Indian managers who had track-switched from a technical job to a management position in the U.S. in a U.S. company. The interviewees were asked five questions about what they believed made them successful in track-switching, and the consensus among interviewees was that for a technician to track-switch effectively, the technician had to have excellent technical skills. In addition to technical skills, the …

An Electrochemical Characterization Of A Vanadium-Based Deoxydehydration Catalyst, Joel Eric Baker

Graduate Theses and Dissertations

Alternative methods for the conversion of polyols into olefins, be it for carbon storage or hydrocarbon fuel production, have become prevalent in today’s chemical industry. One process in particular, deoxydehydration (DODH) has been proven effective in taking sustainable biomass derivatives and converting them through the utilization of various homogenous metal catalysts. While this process may show productive yields and material conversion, it is hindered by the need of a sacrificial reductant. This makes a novel process economically unviable and relatively unused outside of scientific research. That fact begs the question: Can the process be improved? It is proposed here that …

“Good Guys Do Rape”: An Examination Of College Student Perceptions Of Sexual Assault Perpetrators, Taylor Blythe Martinez

Graduate Theses and Dissertations

When people think of a typical sexual assault, they rely heavily on preconceived notions of sexual violence, which often represents stereotypical rape scenarios. Many stereotypical depictions of perpetrators tend to be centered around individuals who are strangers, mentally ill, lonely, with poor or impoverished upbringing. How perpetrators and victims are depicted impact the likelihood of others believing victims and attributing guilt to perpetrators. This may contribute to societal endorsement of acquaintance rape as not real compared to stereotypical rape scenarios. The current study examines how college students, and in particular fraternity men and sorority women, view perpetrators of sexual assault. …

Electrochemical Time Of Flight For Rapid And Direct Measurement Of Diffusion Coefficients, Jonathan C. Moldenhauer

Graduate Theses and Dissertations

The determination of diffusion coefficients is of fundamental importance to the understanding of electrochemistry and sensors. Developing a method by which diffusion coefficients of Red/ox active analytes can be determined quickly and elegantly, would be a great advancement over presently accepted methods. This dissertation reports the reviving electrochemical time of flight (ETOF), and developing a method that allows for empirical determination of diffusion coefficients from a single measurement. ETOF is a generate and detect experiment where the time an electrochemically generated species takes to transit a known distance is measured and related to the diffusion coefficient of the species. The …

In Ovo Evaluation Of Floramax-B11 On Marek's Disease Hvt Vaccine Protective Efficacy, Hatchability, Microbiota Composition, Morphometric Analysis, And Salmonella Enteritidis Infection In Broiler Chickens, Kyle Dean Teague

Graduate Theses and Dissertations

It has previously been shown that effective probiotics can accelerate gut maturation and the development of a normal microflora in poultry. This results in increased resistance to enteric pathogens encountered by chicks early in life. Our objective in experiments 1 and 2 was to evaluate the effect of in ovo administration of FloraMax®-B11 (FM) on Marek’s disease (MD) herpesvirus of turkeys (HVT) vaccine protective efficacy. In Exp. 1, day 18 White Leghorn embryos were randomly distributed in four groups, 1) HVT vaccinated, no MDV challenge, 2) HVT + FM vaccinated, no MDV challenge, 3) HVT vaccinated, challenge with virulent MDV, …

Exploiting Hardware Abstraction For Parallel Programming Framework: Platform And Multitasking, Hongyuan Ding

Graduate Theses and Dissertations

With the help of the parallelism provided by the fine-grained architecture, hardware accelerators on Field Programmable Gate Arrays (FPGAs) can significantly improve the performance of many applications. However, designers are required to have excellent hardware programming skills and unique optimization techniques to explore the potential of FPGA resources fully. Intermediate frameworks above hardware circuits are proposed to improve either performance or productivity by leveraging parallel programming models beyond the multi-core era.

In this work, we propose the PolyPC (Polymorphic Parallel Computing) framework, which targets enhancing productivity without losing performance. It helps designers develop parallelized applications and implement them on FPGAs. …

Plasmon-Mediated Energy Conversion In Metal Nanoparticle-Doped Hybrid Nanomaterials, Jeremy Dunklin

Graduate Theses and Dissertations

Climate change and population growth demand long-term solutions for clean water and energy. Plasmon-active nanomaterials offer a promising route towards improved energetics for efficient chemical separation and light harvesting schemes. Two material platforms featuring highly absorptive plasmonic gold nanoparticles (AuNPs) are advanced herein to maximize photon conversion into thermal or electronic energy. Optical extinction, attributable to diffraction-induced internal reflection, was enhanced up to 1.5-fold in three-dimensional polymer films containing AuNPs at interparticle separations approaching the resonant wavelength. Comprehensive methods developed to characterize heat dissipation following plasmonic absorption was extended beyond conventional optical and heat transfer descriptions, where good agreement was …

Determinism And The Role Of Moral Responsibility, Justin Edward Edens

Graduate Theses and Dissertations

In order to solve the apparent incompatibility between moral responsibility and determinism, it is necessary to understand moral responsibility in terms of the function it plays within moral systems, which is highly similar to the role played by laws within judicial systems. By showing that a conception of moral responsibility based upon desert is metaphysically untenable, a function-based conception will be showed to be much more likely. Furthermore, by considering why the desert-based conception has proven so resilient, insight into the moral responsibility/determinism debate may be possible. Lastly, this paper considers whether the problems with this conception can be solved, …

Ecological Importance Of Invader Source Population And Disturbance In Aquatic Invasions, Nicole Elizabeth Graham

Graduate Theses and Dissertations

Invasive species are a global problem and their effects on recipient ecosystems may be mediated by disturbance and intraspecific variation. Crayfish can substantially influence stream structure and function, and invasive crayfish often have differential impacts than native crayfish in aquatic ecosystems. Since species traits often vary across a distribution, it is possible that invasive crayfish from different source populations may have distinct impacts on recipient ecosystem structure and function. In the Ozark Highlands of Arkansas and Missouri, USA, invasive O. neglectus (the Ringed Crayfish) may be leading to the displacement of native O. eupunctus (the Coldwater Crayfish). The objective of …

Influence Of Exogenous Phytase Level And Interaction With Supplmental Xylanase On Live Performance And Phosphorus Retention Of Broilers, Peyton Gilbert

Graduate Theses and Dissertations

Two 3-week experiments were conducted, each using 480 day-old male broilers placed randomly among 96 battery cages (5 per cage; 680cm2 per bird), to evaluate the influence of phytase supplementation, with or without supplemental xylanase, on bird performance. Individual body weights and cage feed weights were taken on days 0, 7, 14, and 21, and mean BW, body weight gain (BWG), feed intake (FI), and FCR over each period calculated. Mortality was recorded daily and used to calculate livability and adjust FCR in both trials. In trial 2, excreta was collected by cage from 14 to 21 days for bone …

The Effect Of Omega-3 Fatty Acids On Energy Metabolism, Energy Intake, And Metabolic Response In Normal Weight And Overweight And Obese School Aged Children (8-12 Years), Charlayne Mitchell

Graduate Theses and Dissertations

Background: Obesity is a major health concern in the United States. Omega-3 fatty acids (O3FA) have been observed to improve metabolic health and therefore might be useful in treatment of obesity. However, little is known regarding the effect of O3FA on school aged normal weight and overweight children.

Objective: The objective of this thesis was to determine if habitual intake of O3FA at breakfast improves energy metabolism, appetite, and metabolic response in overweight and obese school-aged children.

Design: Twenty healthy, normal weight (NW; n = 11) and overweight (OW; n = 9) children aged 8-12 years were randomly assigned to …

Modern Palestinian Filmmaking In A Global World, Sarah Frances Hudson

Graduate Theses and Dissertations

This dissertation employs a comprehensive approach to analyze the cinematic accent of feature length, fictional Palestinian cinema and offers concrete criteria to define the genre of Palestinian fictional film that go beyond traditional, nation-centered approaches to defining films. Employing Arjun Appardurai’s concepts of financescapes, technoscapes, mediascapes, ethnoscapes, and ideoscapes, I analyze the filmic accent of six Palestinian filmmakers: Michel Khleifi, Rashid Masharawi, Ali Nassar, Elia Suleiman, Hany Abu Assad, and Annemarie Jacir. After a detailed examination of each filmmaker’s body of work, I examine the trends that occur across the genre that have the greatest impact on the Palestinian filmic …

Rhythm And Movement: The Lighting Design For "Eurydice", A Living Poetic Metaphor, Emily Rachel Clarkson

Graduate Theses and Dissertations

This thesis will delve into the historical context, analysis, design process and execution of the lighting design for the University of Arkansas’ production of Sarah Ruhl’s Eurydice. Special care will be taken to document an exploration of the challenges faced by this production during research, design meetings as well as throughout the implementation of this design. This document will seek to answer the questions: how does one design the lighting for a show that is in and of itself a metaphor? When each scene requires its own striking visual, how does the designer weave the play together so that it …

Remote Sensing Insights Into Storage Capacities Among Plains Village Horticulturalists, Adam Wiewel

Graduate Theses and Dissertations

Maize was a fundamental component of the diet and economy of Middle Missouri Plains Village groups, sedentary farmers with settlements along the Missouri River during the last millennia. More than a century of study has contributed to our understanding of agricultural production among these peoples, but little effort has been made to consider temporal variation in production. Such an understanding is crucial to examining changes that occurred before and after the arrival of colonists and their trade goods in the seventeenth century. Plains archaeologists have suggested that the storage capacity of Middle Missouri villages increased during the sixteenth through the …

Decision Support Software For Palmer Amaranth Weed Control, Karen Renee Lindsay

Graduate Theses and Dissertations

Herbicide-resistant Palmer amaranth [Amaranthus palmeri (S.) Wats.] has been identified as one of the most troublesome weeds, specifically for corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] producers in the southern United States. The use of herbicide technology remains the most widely used method of weed control, despite the evolution of herbicide-resistant Palmer amaranth. Therefore, a need currently exists for research and extension education to encourage the adoption of Integrated Pest Management (IPM) to address the problem of herbicide-resistant Palmer amaranth in the southern United States. By equipping crop producers, educators, and weed management …

Scenic Design For "The Metal Children", Joseph Bryan Farley

Graduate Theses and Dissertations

A scenic design for the play “The Metal Children” by Adam Rapp was created and performed by the steps of the design process used in the design program at the University of Arkansas Department of Theatre. The Metal Children presents itself as a multi-unit set. With a script that introduces five different locations, one begins to question how we move forward with every different scene fluidly and in a quick scene shift time. When beginning the design process, I had to look at the show as if it were a musical with multiple scenic pieces that would fly in and …

A Genetic Analysis Of Nuclear Functions Of The Lipin Protein In Drosophila Melanogaster, Xeniya Rudolf

Graduate Theses and Dissertations

Lipins are a family of proteins that have critical functions in the control of fat storage and energy homeostasis. Biochemically, lipins have two functions. They provide an enzymatic activity (phosphatidate phosphatase or PAP activity) in the glycerol-3 phosphate pathway that leads to the production of storage fats (triacylglycerols). In addition, they play a role in the regulation of genes in the cell nucleus as transcriptional co-regulators. The PAP activity of lipins has been widely studied in a number of organisms. However, the transcriptional co-regulator function is not as well described in the literature. The transcriptional function of lipins depends on …