Digital Commons Network^™

Promise And Practice: Toward An Expanded, Integrated, Collaborative Narrative On American Indians In Our National Parks, Bethany Hope Henry

Graduate Theses and Dissertations

Managed by the National Park Service, the Trail of Tears National Historic Trail, established in 1987, was developed to preserve physical segments of land and water routes, but also sites of memory such as unmarked graves and internment camps. Because the foundation of the national trail was the result of successful partnership of Cherokee grassroots efforts and multiple trail and federal advocates, the evolution of that collaboration merits consideration after thirty years to evaluate the application of standards for consultation, co-management, and heritage tourism. While the national trail preserves and marks the various routes, this study examines how three national …

Validation Of A 5-Minute Vpc Test To Assess And Compare Cognitively Intact Individuals And Individuals With Cognitive Impairments, Spencer Smith

Graduate Theses and Dissertations

The prevalence of cognitive impairments in the older adult population is growing. Finding treatment solutions to impede a cognitive decline can possibly lead to fewer cases of mild cognitive impairment, dementia, and Alzheimer’s disease. A Visual Paired Comparison (VPC) could serve as a tool to predict, monitor, and regulate people who are susceptible to a cognitive decline. The purpose of this study was to 1) to determine the validity of the Neurotrack 5-minute VPC test with the Neurotrack 30-minute VPC test, 2) to determine the test-retest reliability of the Neurotrack 5-minute VPC test, 3) to compare Neurotrack 5-minute VPC scores …

The Image From The Road: Towards Mapping The Phenomenological, Rachel Anna Smith Loerts

Graduate Theses and Dissertations

An area of focus, used in early and contemporary forms of cognitive geography research, is the ‘cognitive map’, a concept that suggests “that people hold a map-like database in their minds to which they can add and use to tackle geographical tasks”. Kevin Lynch, an urban planner in the 1960s, was an early adopter of the cognitive map approach to reveal spatial cognition, what or how people see their environment, specifically cognition of the urban environment. Lynch’s research aimed to develop empirical methods, to identify how people make spatial relationships. Contemporary tools like machine learning are now considered relevant for …

Essays On Networks And Corporate Finance, Tatiana Salikhova

Graduate Theses and Dissertations

In my dissertation I explore how personal networks affect firms’ financial decisions. In the first essay, I study how social connections among divisional managers affect the capital allocation to divisions in diversified conglomerates. In contrast to the previous studies, I focus on the horizontal connections or connections formed among managers of the same level of corporate hierarchy. I show that connections among divisional managers lead to higher sensitivity of segment capital spending to segment’s growth opportunities, higher firm-level allocation efficiency and higher firm value. Additionally, firms tend to strategically assign better-connected managers to these segments, and connections help to reduce …

Interactions Between The Protein Industry And Blogs: An Analysis Of Content And Perceptions, Kylie Hackworth

Graduate Theses and Dissertations

This thesis contains two articles that describe and characterize the use of the social media platform of blogging in the context of the animal agriculture and protein industry. The first article used content analysis to analyze blog posts and look for themes throughout the posts. This study included 37 posts from ten authors and resulted in four recurrent themes. The major themes were environment, consumption of protein, alternative protein source, and alternative dieting. The tones regarding these themes were both negative and positive toward the protein industry.

The second article used hand-coding to look for themes and similarities concerning flow …

Modeling Of Complex Parts For Industrial Waterjet Cleaning, Braden James

Graduate Theses and Dissertations

Industrial high-pressure waterjet cleaning is common to many industries. The modeling in this paper functions inside a collaborative robotic framework for high mix, low volume processes where human robot collaboration is beneficial. Automation of pressure washing is desirable for economic and ergonomic reasons. An automated cleaning system needs path simulation and analysis to give the operator insight into the predicted cleaning performance of the system. In this paper, ablation, the removal of a substrate coating by waterjet, is modeled for robotic cleaning operations. The model is designed to work with complex parts often found in spray cleaning operations, namely parts …

Preparation And Evaluation Of Single-Stranded Dna Aptamer-Based Immunological Adjuvant In Broiler Chickens, Adil Sabr Al-Ogaili

Graduate Theses and Dissertations

Mineral oils and metal salts are commonly used as adjuvants to enhance acquired immunity. Recently, monoclonal antibodies (MAbs) and recombinant peptides agonist CD40 receptor have shown remarkable promise for induction of rapid and robust immune responses. Limitations of this approach MAb production costs and multiple administrations due to anti-MAb immune responses. Here we demonstrate the development of a unique and sophisticated DNA aptamer-based alternative for CD40-directed delivery of universal antigens as an alternative in chickens, and potentially other vertebrate species. This receptor, expressed by antigen-presenting cells, acts as a costimulatory molecule for activated T helper lymphocytes. After initially selecting for …

Sastra Buruh Migran Indonesia: Crossing Borders And Proposing A New Concept Of Indonesian Domestic Workers, Tri Murniati

Graduate Theses and Dissertations

In recent years, Indonesian migrant women who seek employment as domestic workers in foreign countries have caught the Indonesian reading public’s attention with their novels, short stories, poems, and non-fiction writings. Creative work by migrant domestic workers was established as a genre when Denok Kanthi Rokhmatika, a domestic worker who works in Hong Kong published her collection of short stories Negeri Elok nan Keras dimana Kami Berjuang (Beautiful and Tough Country where We Struggle) in 2002 (Insani and Raihan iii). The publication marks the birth of a new genre, which has become known as “Sastra Buruh Migran Indonesia” (Indonesian migrant …

Costume Design For "Life Is A Dream" By Pedro Calderon De La Barca, Kelsey Looney

Graduate Theses and Dissertations

The following thesis explains the process used to create and implement the costume design for the production of Life is a Dream produced at the University of Arkansas in the spring of 2018. In this thesis I will detail the process of moving from research, to renderings, to finished costumes. This design process includes a script analysis, inspiration collages, portrait gallery, sketches, renderings, production photographs, and an assessment of the success of the process overall.

Social Class And Social Networks: How Sociocultural Upbringing Affects Organizational Social Networks, Jacqueline Tilton

Graduate Theses and Dissertations

Organizations are a key venue where individuals from different backgrounds have the opportunity to interact and yet we know very little about how social class background shapes interactions within the workplace. There is reason to believe that the differing value systems of social class groups influence their attitudes and behavior towards workplace connections and relationship formation. This article considers how social class background affects organizational social networks as well as the class-distinct values and attitudes that shape networking behavior of employees. To study this phenomena, I analyze a sample of 490 employees from a broad range of roles and organizations …

Spatial Reorganization Of Histone-Like Nucleoid Structuring Proteins Caused By Silver Nanoparticles, Meaad Alqahtany

Graduate Theses and Dissertations

Silver nanoparticles (AgNPs) and ions (Ag+) can be the new generation of antibiotics due to their antimicrobial effects against bacteria and other microbes. Many studies have shown that AgNPs and suppress the growth of bacteria and damage the cell walls of the microbes; therefore, treating bacterial cells with AgNPs may be a promising method to terminate multi-resistant bacteria. In this work, the effect of AgNPs with two different surface coatings on the spatial reorganization of histone-like nucleoid structuring (H-NS) proteins in Escherichia coli bacteria was investigated using quantitative super-resolution fluorescence microscopy to understand the toxicity and antimicrobial mechanism of AgNPs. …

Maternal Criticism: Reading Two Middle Eastern Women Writers As Nonviolent Peace Activism, Charlyn Marie Ingwerson

Graduate Theses and Dissertations

This dissertation advocates for reading the literatures of two Middle Eastern women writers through a Maternal Critical lens that recognizes the demands of universal vulnerability in characters who resist violence, and responds in Maternal communities of Readers that connect readers to characters, readers to writers, and readers to other readers, carrying the struggle for equity forward. My unfolding argument, centered on Maternal Critical activity in the novels of Palestinian writer Sahar Khalifeh and Israeli writer Ronit Matalon, demonstrates how literature by these Middle Eastern women is part of a narrative context of women’s peacemaking and resistance to violence, a part …

Painting The Leaky Pipeline Pink: Girl Branded Media And The Promotion Of Stem, Juniper Patel

Graduate Theses and Dissertations

This thesis provides a critical feminist analysis of girl branded media depictions of girls in STEM. Through close textual analysis of three case studies—Disney Fairies films, Barbie: Dreamhouse Adventures, and My Little Pony: Equestria Girls media—I found that such STEM promotion tends to emphasize traditional gender roles and neoliberal market values. Disney Fairies films promote traditional gender roles via portrayals of play STEM, white hegemony, and western beauty standards. Additionally, these films promote the neoliberal ideal of industrialization as consequence free. Dreamhouse Adventures depicts STEM in relation to traditional gender norms such as caretaking, heteronormativity, and girl culture. Furthermore, this …

Implications Of Rice Cultivar Selection To Optimize Returns From Crop Insurance, David Ethan Branscum

Graduate Theses and Dissertations

Rice production differs from most other field crops by distinct differences in yields across cultivars and rice producers being paid for yield after post-harvest milling. Using eleven years (2003-2013) of Arkansas harvest data from performance trials in six different locations, hybrids have 19% higher paddy yields and head rice yield rate 1.7% lower than conventional cultivars. Given the 2014 Farm Bill’s emphasis on crop insurance as a risk management tool for producers, these variations in yield among cultivars have significant implications for rice producers. Comparing national level, crop insurance data on corn, soybeans and rice indicates rice producers strongly prefer …

Effects Of Genre Tag Complexity On Popular Music Perception And Enjoyment, Lauren Shepherd

Graduate Theses and Dissertations

The popular online streaming platform Spotify added over 1400 genre tags in the last two years. Despite that numerous artists and composition competitions claim to seek projects that “transcend the traditional notion of genre,” the industry has only added more complex and mystifying genre labels. This dichotomy between artists and industry ignores the effects these labels have on consumers. Do more complex genre tags enhance the listening experience for the average consumer by providing additional information about what they are about to hear? The current research seeks to examine the effects of the granularity of genre tags on popular music …

Dominant Leadership Dynamics Of School Administrators Leading Non-Instructional Personnel, Michael Ewton

Graduate Theses and Dissertations

With the literature and many schools and school districts advocating for enhanced communication and engagement with parents, families, and the community at large, it is advisable that school-level administrators consider the manner in which they engage the non-instructional employees who serve their schools. This dissertation explores the dominant leadership dynamics experienced by high school principals responsible for supervising non-instructional support services and leading non-instructional operations personnel in their schools. Trained and expected to be instructional leaders, principals must still ensure their students receive the basic services necessary to maintain a safe and effective learning environment. Ensuring students receive the benefit …

Female Perspectives On Mountain Biking, Rebecca Irvin

Graduate Theses and Dissertations

This study strived to inquire about females’ perspectives of learning to mountain biking. Through an online survey, the present study explored the constraints (White, 2008) that keep women from trying the sport. Respondents (N=150) answered an online survey. Results of this study will be useful for outdoor education professionals, parks and recreation programming, cycling advocacy organizations, and any who make marketing materials for the outdoor industry. The study is designed to provide a description of the female perspectives regarding constraints and motivation towards learning to mountain bike.

Teaching Introductory Programming Concepts Through A Gesture-Based Interface, Lora Streeter

Graduate Theses and Dissertations

Computer programming is an integral part of a technology driven society, so there is a tremendous need to teach programming to a wider audience. One of the challenges in meeting this demand for programmers is that most traditional computer programming classes are targeted to university/college students with strong math backgrounds. To expand the computer programming workforce, we need to encourage a wider range of students to learn about programming.

The goal of this research is to design and implement a gesture-driven interface to teach computer programming to young and non-traditional students. We designed our user interface based on the feedback …

Shifting Abortion Attitudes Using An Empathy-Based Media Intervention: A Randomized Controlled Study, Mary Ellen Hunt

Graduate Theses and Dissertations

U.S. abortion restrictions diminish access and perpetuate a culture of hostility toward abortion seekers. Support for restrictions is high—potentially, because restriction knowledge is low and attitudes are complex. The current study focused on knowledge and support of restrictions and empathy for abortions seekers among Arkansans. The purpose was to evaluate the effectiveness of a video intervention intended to increase awareness of Arkansas abortion restrictions and induce empathy for abortion seekers.

Using a randomized controlled trial with pre-, post-, and follow-up design, a sample of Arkansans (N = 369) were randomly assigned to one of five video conditions--either a control or …

Black Female Graduate Students' Experiences Of Racial Microaggressions At A Southern University, Kendra Elizabeth Shoge

Graduate Theses and Dissertations

Researchers have found that microaggressions can cause psychological distress, frustration, avoidance, confusion, resentment, hopelessness, and fear. Previous studies from Southern universities have addressed the adjustment experiences of Black women in graduate programs, obstacles faced by Black women in higher education and strategies to overcome those obstacles, and factors associated with Black student motivation and achievement. Discrimination and racism are factors identified in those studies, however, there is little research on the experiences of Black women in graduate programs and the impact of racial microaggressions on them.

The purpose of this study was to examine Black female graduate students’ experiences of …

Assessment And Support For Basic Computer Skills At Community College Hispanic Serving Institutions In California, Jason Wayne Hough

Graduate Theses and Dissertations

This cross-sectional survey study was conducted to determine if California community colleges designated as Hispanic Serving Institutions (HSIs) assess incoming students for basic computer skills, provide learning support for these skills, as well as assess the attitude of administrators towards basic computer skills of incoming students. Prior published research documented the false assumption in higher education incoming students are “digital natives”, capable of effectively using technology expected on college campuses; however, there was no research focused on community colleges designated as HSIs. The study adds to the body of literature about the assessment of and support for basic computer skills …

The Perceived Occupational Benefits Of Competing In Technical Collegiate Competitions, Trenton James Lindbloom

Graduate Theses and Dissertations

Today’s workforce is more complex and demanding than ever before. In order to compete in today’s job market, students need to be equipped with complex problem solving skills and hands-on experience before graduation. While the formal classroom provides knowledge in basic skills and in some cases hands-on learning, this may not be enough to be competitive in industry. Students need to be engaged in practical situations in order to improve communication, acquire leadership abilities, and learn to work with others to solve problems and apply critical thinking skills. These skillsets are required by industry to be a productive employee in …

The Impacts Of Administering Metabolites Of Saccharomyces Cerevisiae On Broiler Performance, Yields And Salmonella Content Of Component Portions, Bill Douglas Potter

Graduate Theses and Dissertations

The impacts of using health-promoting Saccharomyces cerevisiae fermentation metabolites in poultry production and processing can be measured in respect to multiple measures of success. Traditionally this yeast-based compound has been administered to poultry, livestock, poultry, and other species to improve animal performance and production volume output. In addition, Saccharomyces cerevisiae fermentation metabolites have also been shown in more recent research to reduce colonization of pathogenic bacteria in the host organism’s gastro-intestinal tract. In this dissertation, the impacts of administering a functional ingredient containing Saccharomyces cerevisiae metabolites on broiler performance measures and pathogen reduction were measured. One of the studies in …

Political Speech On Twitter: A Sentiment Analysis Of Tweets And News Coverage Of Local Gun Policy, Mohamed Lemine M'Bareck

Graduate Theses and Dissertations

While the gun debate has been one of America’s most politically contentious issues, Twitter has become, in recent years a popular venue for politicians to carry out the debate. The present thesis is aimed at better understanding of political speech on Twitter, as well as the ways in which political frames and sentiment on Twitter differ from those of news media coverage regarding gun policy in the state of Arkansas.

The study uses framing theory, which assumes that both news media and individuals use frames to construct perceptions and narratives about issues. Adopting an automated content analysis as a method, …

Optical Enhancement In Periodic Plasmonic Gratings For Sers And Metal-Semiconductor-Metal Photodetectors (Msm-Pds) Applications, Ahmad Aziz Darweesh

Graduate Theses and Dissertations

This dissertation is aimed to numerically study the effect of plasmonic grating electrodes on the efficiency of metal-semiconductor-metal photodetectors (MSM PDs) and the sensitivity of Surface Enhanced Raman Spectroscopy (SERS). This research can benefit many areas of nanoscience and optics, including plasmonic applications, such as, super lenses, nano-scale optical circuits, optical filters, surface plasmon enhanced photo-detectors solar cells, imaging sensors, charge-coupled devices (CCD), and optical-fiber communication systems. Several parameters, wire widths and thickness, gap space, taper angle, and the incident wavelength and angle, were investigated. The goal of this research is to utilize the plasmonic phenomenon by using plasmonic gratings …

Plasmonic Properties Of Nanoparticle And Two Dimensional Material Integrated Structure, Desalegn Tadesse Debu

Graduate Theses and Dissertations

Recently, various groups have demonstrated nano-scale engineering of nanostructures for optical to infrared wavelength plasmonic applications. Most fabrication technique processes, especially those using noble metals, requires an adhesion layer. Previously proposed theoretical work to support experimental measurement often neglect the effect of the adhesion layers. The first finding of this work focuses on the impact of the adhesion layer on nanoparticle plasmonic properties. Gold nanodisks with a titanium adhesion layer are investigated by calculating the scattering, absorption, and extinction cross-section with numerical simulations using a finite difference time domain (FDTD) method. I demonstrate that a gold nanodisk with an adhesive …

Comparison Of Physical Intensity Between Interactive Video Game Cycling And Conventional Stationary Cycling In Adolescents With High Functioning Autism Spectrum Disorder, Tariq Mohammed Alsoqairan

Graduate Theses and Dissertations

Background: Obesity has become a serious health concern in adolescents with autism spectrum disorder (ASD). Researchers have indicated that sedentary behaviors, especially technological activities, such as video games and other forms of screen-based activities is the main barrier to participate in physical activities. Active video games have demonstrated the efficacy in increasing physical activity and reducing body weight in children and adolescents with disabilities.

Purpose: The purpose of the study was to examine the exercise intensity and enjoyment level of interactive video game cycling (IVGC) in comparison with conventional stationary cycling (CSC) during matched number of sessions utilizing the same …

Does Grit Matter? A Correlational Study Of The Relationship Between Grit-S Assessment Scores And Student Retention In Undergraduate Online Programs, Kay Best Murphy

Graduate Theses and Dissertations

Historically, colleges and universities have used intelligence-based admissions tests to select students who demonstrate the intelligence to succeed academically. These institutions also have employed strategies to help students stay in school and graduate. However, despite tests and support strategies, the National Center for Education Statistics in 2018 reported a six-year completion rate of about 60% of first-time, full-time bachelor’s degree-seeking students for the 2010 cohort, including both traditional and online students. One study shows retention in online classes can be 10% to 15% lower than in traditional face-to-face courses (Carr, 2000). Meanwhile, higher education institutions today face increasing pressure to …

Seeking Success: A Case Study Of African American Male Retention At A Two-Year College, Richard Latroy Moss

Graduate Theses and Dissertations

There is a problem in higher education in the United States. African American students, specifically males, are not being retained and graduating. This problem is even more evident for students that attend two year colleges. African American male students lag behind white males, Hispanic males and African American females, in retention and graduation rates. This problem has caught the attention of many leaders. Policy makers and college leaders are among those who seek to understand the why and find solutions to the challenge of African American male student retention at two year colleges, as two year colleges are becoming the …

Defining The Genetic Regulation Of Appressorium Formation In Cercospora Zeae-Maydis, Hazel Apiyo Buyu

Graduate Theses and Dissertations

Cercospora zeae-maydis is one of the primary pathogens associated with gray leaf spot, one of the most damaging foliar diseases of maize in the world. Gray leaf spot can be managed to some extent by cultural practices and fungicide applications. To infect maize, C. zeae-maydis grows towards stomata and forms infectious structures, termed appressoria, over stomatal pores. Prior research on the pathogen revealed that appressorium formation is crucial for foliar infection. Although several genes involved in pathogenesis have been identified in C. zeae-maydis, the molecular regulation of appressorium formation in this pathogen is poorly understood. Specifically, how the fungus senses …