Digital Commons Network^™

Outcomes Of Platform Openness In Complementary Markets, Franck Loic Soh Noume

Graduate Theses and Dissertations

Mobile platform ecosystems are hyper-competitive environments. They provide important entrepreneurial opportunities for businesses that develop mobile apps. Platform openness is foundational in mobile platform ecosystems as it enables interactions between complements and platform. Although there are several studies on the impact of platform openness, our understanding of the outcomes of platform openness remains limited. In this dissertation, we examine thoroughly underexplored facets of platform openness as well as understudied outcomes. In the first essay, we investigate the impact of platform openness on incumbent complements’ performance outcomes. We unravel important causal mechanisms related to competition dynamics between new entrants and incumbent …

Remote Sensing And Gis Study Of Hazards And Risks In East Africa, Hafid Nanis

Graduate Theses and Dissertations

East Africa encompasses numerous developing countries and involves one of the most active continental rifts on Earth; namely, the East African Rift System. This region is prone to diverse geohazards due to its geographical location at the plate boundary. Several damaging events had happened across the region and more are predicted to occur in the near future. Therefore, it is crucial to investigate, assess, and forecast natural hazards and potential risks in the region. In this dissertation, remote sensing and Geographic Information System (GIS) were employed to conduct three independent studies focused on assessing geohazards in east Africa. Each study …

“Deserting The Broad And Easy Way”: Southern Methodist Women, The Social Gospel, And The New Deal State, 1909-1939, Chelsea Hodge

Graduate Theses and Dissertations

Over the course of three decades, white southern Methodist women took on issues of labor and poverty through their national women’s organization, the Woman’s Missionary Council (WMC). Between 1909 and 1939, the WMC focused their work on five groups of people they viewed as in need of their help: women, children, black southerners, immigrants, and rural people. Motivated by the Social Gospel and an intense belief that their faith led them to effect real change in the American South, the WMC intervened in people’s lives, pursuing reform that could at times be maternalistic and condescending but at other times radical …

The Adult Public’S Perception Of The Utility Of Play Therapy, Margaret L. Hindman

Graduate Theses and Dissertations

Children communicate through symbolism and play as toys are children's words and play is their language (Landreth, 2012; Oaklander, 1988; Piaget, 1951; Ray, 2016). Play therapists facilitate developmentally appropriate support for children (Landreth, 2012). Often parents are unaware of the importance of play in children’s counseling (Brumfield & Christensen, 2011; Landreth, Bratton, Kellam, & Blackard, 2006).

Since adults often make decisions for children, it is important to know adults’ perceptions of play therapy utility. There is little research on parents’ knowledge of mental health services especially research specific to play therapy (Gallo, Comer, & Barlow, 2013; O’Connor & Langer, 2018). …

Within-Person Variability Of Internal And External Sexual Consent, Malachi Willis

Graduate Theses and Dissertations

Background: Sexual consent is often conceptualized as an internal willingness to engage in sexual activity, which can be communicated externally to a sexual partner. Preliminary evidence indicates that people’s sexual consent varies from day to day. Study designs that assess sexual consent at multiple time points (e.g., experience sampling methodology [ESM]) are needed to better understand the within-person variability of sexual consent; however, extant validated measures of sexual consent are not appropriate for ESM studies, which require shorter assessments due to the increased burden this methodology has on participants. As such, the goal of this dissertation was to develop valid …

A Suspected Democratic Regiment: The Fourth New Hampshire Volunteers In The American Civil War, Eric Paul Totten

Graduate Theses and Dissertations

The Fourth New Hampshire Volunteer Infantry was suspected of being a Democratic regiment due to the intense partisanship of the antebellum and Civil War era. The political socialization of New Hampshire’s citizens divided communities and fostered animosity towards political opponents. The unit’s recruits came from regions that were political battlegrounds and contained a large number of Irish immigrants. The intemperate and disorderly conduct of the officers and men of the Fourth during the Port Royal expedition seemingly confirmed the suspicions of civilians on the home front. The arrest of Colonel Louis Bell by Major General David Hunter led to further …

The Impact Of Dietary Egg Intake On Metabolic Health In Food Insecure Households, Sam Walker

Graduate Theses and Dissertations

Food Insecurity (FI) is defined as a condition in which individuals lack access to adequate food due to limited financial resources. FI is estimated to impact 12% of households in United States. Adults and children who experience FI are an increased risk for developing metabolic disease such as type 2 diabetes, obesity, hypertension, and cardiovascular disease. The negative health outcomes associated with FI are multi-factorial, however, many of them may be caused by limited nutritional intake and poor diet quality. Efforts to better understand the obstacles food insecure populations face is critical in order to improve nutrient intake and minimize …

Buffer Zones And The Recreational Golf Sector: A Negligence Case Content Analysis, Natalie Bird

Graduate Theses and Dissertations

Buffer zones are a risk management method used within sport and recreation to protect participants and spectators from avoidable injury. Within the recreational golf sector, buffer zone standards do not exist. This poses a problem as golf courses in the recreational sector serve a wide range of customers in terms of age, skill level, and experience. A legal case content analysis of 1,561 golf negligence lawsuits aimed to answer research questions related to locations of incidents, circumstances that led to injury, and injuries or damages that were the result of errant golf shots. A Westlaw search provided the data for …

Election Day — Documentary, John Thomas Tarpley

Graduate Theses and Dissertations

Election Day is a three-channel documentary chronicling the places, personalities, and tone of Little Rock, Arkansas, during its titular midterm Election Day in November 2018. Throughout the course of the day, the film branches across the city, capturing mini-narratives, bits of conversation, and tableau of civic activity in the public sphere. It is less concerned with the quantitative facts of the day as it is with conveying the transitory social expressions and moods of a modern, southern city on a uniquely American day. This project represents my continued documentary interest in creating inclusive, contemporary local portraits and counter-historical chronicles of …

Effect Of Predictor Dependence On Variable Selection For Linear And Log-Linear Regression, Apu Chandra Das

Graduate Theses and Dissertations

We propose a Bayesian approach to the Dirichlet-Multinomial (DM) regression model, which uses horseshoe, Laplace, and horseshoe plus priors for shrinkage and selection. The Dirichlet-Multinomial model can be used to find the significant association between a set of available covariates and taxa for a microbiome sample. We incorporate the covariates in a log-linear regression framework. We design a simulation study to make a comparison among the performance of the three shrinkage priors in terms of estimation accuracy and the ability to detect true signals. Our results have clearly separated the performance of the three priors and indicated that the horseshoe …

Phenotypic And Genotypic Studies In The Peach [Prunus Persica (L.) Batsch] And Muscadine Grape (Vitis Rotundifolia Michx.), Jennifer Anne Lewter

Graduate Theses and Dissertations

Peach: Peaches [Prunus persica (L.) Batsch] are routinely chilled to increase shelf-life. Exposure to temperatures of 5° C for two weeks can induce chilling injury (CI) symptoms, including flesh mealiness (or wooliness) and a lack of juiciness. Phenotypic data were collected on seven biparental F1 peach populations maintained at the University of Arkansas Fruit Research Station. A genome wide association study (GWAS) was performed using TASSEL 5 which identified four quantitative trait loci (QTLs) associated with expressible juice, four QTLs for mealiness, five QTLs for soluble solids, and three QTLs for fruit weight. Exploiting these genetic markers could help breeders …

Study On New Sampling Plans And Optimal Integration With Proactive Maintenance In Production Systems, Sinan Obaidat

Graduate Theses and Dissertations

Sampling plans are statistical process control (SPC) tools used mainly in production processes. They are employed to control processes by monitoring the quality of produced products and alerting for necessary adjustments or maintenance. Sampling is used when an undesirable change (shift) in a process is unobservable and needs time to discover. Basically, the shift occurs when an assignable cause affects the process. Wrong setups, defective raw materials, degraded components are examples of assignable causes. The assignable cause causes a variable (or attribute) quality characteristic to shift from the desired state to an undesired state.

The main concern of sampling is …

An Experimental Investigation Of Liquid Hydrocarbons In A Simulated Titan Environment, Kendra Farnsworth

Graduate Theses and Dissertations

Saturn’s moon, Titan, has surface conditions (89–94 K, 1.5-bar atmosphere) that permit lakes of methane, ethane, and dissolved atmospheric nitrogen. The effects of atmospheric nitrogen on methane-ethane liquid properties is poorly understood, leading to uncertainty in Titan modeling. I address this question by experimentally investigating the physical properties of methane-ethane liquids under a 1.5-bar nitrogen atmosphere in a simulated Titan environmental chamber.

Chapter 1 addresses nitrogen dissolution kinetics in Titan’s liquid hydrocarbons. I found an exponential increase in nitrogen quantity and diffusion coefficients with increasing methane mol%. I find that Titan’s liquids are likely not saturated in nitrogen, with dissolution …

Far-Right Extremism In America: A Geospatial Analysis Of Incident Distribution, Meredith Leann Lerma

Graduate Theses and Dissertations

There has been little empirical research on the spatial relationship of violent far-right extremism. Previous studies have only focused on portions of far-right violent incidents, such as homicides, or amalgamated all far-right extremist activity, including legal incidents. This study uses data from the Extremist Crime Database (ECDB) and Southern Poverty Law Center (SPLC) in a temporal frame of 2000 to 2018 to test the relationship of violent incidents against geographic and social factors. The goal is to explore the relationships between macro-level factors and violent far-right extremist incident. The research determines that the presence of hate groups, higher immigrant populations, …

The Formation Of Ottoman Sufism And Eşrefoğlu Rumi: A 15th Century Shaykh Between Popular Religion And Sufi Ideals, Baris Basturk

Graduate Theses and Dissertations

This dissertation evaluates a transformative period in the history of the Ottoman State in which the processes of Islamization and Turkification coincided with the expansion and imperialization of the Ottoman polity. This study focuses on an Ottoman Sufi figure, Eşrefoğlu Rumi (?-1469), who benefited form this context, embarked upon a mystical path, and authored seminal works that shaped Ottoman Sufism for generations. This dissertation discusses Eşrefoğlu Rumi’s role in the construction of Islamic orthodoxy based in his Sufi ideals which he disseminated to an Anatolian and Balkan Turkish-speaking Ottoman audience. The significance of this dissertation is that it emphasizes the …

Children's Use Of Accent As A Cue For Cooperative Potential, Rachel Stevens

Graduate Theses and Dissertations

In recent years, several studies have shown that 5- and 6-year-old children make social judgments based on accent, consistently displaying a social preference for individuals who speak with a native accent. One theory hypothesizes that this preference to favor individuals who speak like us stems from our evolutionary history, during which accent and other language variations would have been strong, salient cues to group membership, and thus, cues to ones likelihood of cooperative behavior. The current study aimed to test this theory by determining if 5- and 6-year-old children use accent to make judgments about an individual’s cooperative potential. Participants …

Developing A High-Throughput Method To Screen Soybean Germplasm For Hypoxia Tolerance In Hydroponic Systems, Derrick Harrison

Graduate Theses and Dissertations

Soybean [Glycine max (Merr.)], the second most planted crop in the United States, is sensitive to field flooding due to depletion of oxygen and accumulation of CO2 in the rhizosphere. There is a need to breed cultivars that are adapted to areas prone to flooding, but field evaluations in the U.S. are limited because of time (one generation per year) and availability of resources (impermeable soils, irrigation, equipment to build levees). The purpose of this study was to develop and execute a protocol of germplasm screening for hypoxia tolerance using hydroponics in a controlled greenhouse environment. Germination rates and vigor …

Student-Run Agencies: A Guideline For Agency Survival, Brooke Borgognoni

Graduate Theses and Dissertations

The purpose of this paper is to study 110 student-run agencies (including advertising, public relations, integrated/digital marketing, communications, and graphics and/or design) in the U.S. by analyzing how they currently operate, what practices exist in the agencies for learning, growth, and continuation and how leadership roles of students and advisors influence the agency. This project built upon past studies of student-run agencies and expanded on the topic using the evolutionary theory of a firm by analyzing factors that determine whether it appears that a student-run agency might dissolve or last. This was determined by measuring the faculty advisor involvement level, …

Hpv Vaccination In Females: The Role Of Primary Health Care And Primary Health Care Providers, Brooke Bouza

Graduate Theses and Dissertations

Two reasons for subpar coverage of the Human papillomavirus (HPV) vaccine are missed clinical opportunities and nonacceptance of the vaccine upon recommendation from a medical provider. The purpose of study one was to examine factors associated with access and adherence to physician’s recommendations in association with HPV vaccine uptake. Data were obtained from National Health Interview Survey (2017). Variables theoretically related to clinical opportunities and adherence to physician’s recommendations were examined in association with HPV vaccine uptake. Univariate logistic regressions were run to determine the associations between the aforementioned variables and uptake of the HPV vaccine. Multinomial logistic regressions were …

Relationship Marketing And Intercollegiate Sport Promotion, Alison Fridley

Graduate Theses and Dissertations

The first article, a case study on a NCAA Division I Power Five university in the southeastern United States, employed a case study framework, explored target markets and exposure techniques through both the planned behavior theory and social identity theory theoretical lenses. This study aimed to better understand how university students and booster club members identify as a social group. The data emerged into four distinct themes, including communication, social interaction, connection, and hospitality. The findings suggested booster club members are primary fans and help the team generate fan interest. The importance of sociability was clear and the implications for …

The Impact Of Graduate Assistantships On The Preparation Of Early Career Student Affairs Professionals, Mary L. Skinner

Graduate Theses and Dissertations

This qualitative case study explored the graduate assistantship experiences of early career master’s prepared student affairs professionals and examined the role these assistantships played in the preparation for their current position. The study included 10 participants who had all graduated with a master’s in higher education within the past 5 years, had participated in a graduate assistantship within student affairs, and worked full-time within a student affairs department at the time of the study. Each participant took part in a one-on-one interview that was recorded, transcribed, and reviewed for themes. I followed Braun and Clarke’s (2012) six-phase approach to thematic …

Web Annotation In English Language Arts: Online Dialogue As A Platform To Support Student Comprehension Of Texts, Jonathan B. Allred

Graduate Theses and Dissertations

This study explores how web annotation—through a process of online reading, writing in the margins, and replying to others’ comments—influences student dialogue in ways that research suggests are associated with improved comprehension. Viewing data through a dialogic lens, and using a qualitative, multiple case study design to observe two high school English Language Arts teachers and their students, this inquiry was guided by the following research questions: (a) How do English Language Arts teachers use web annotation to support student comprehension of texts? (b) To what extent, if any, does web annotation appear to support student comprehension of texts? and …

Merchants Without Borders: Qusman Traders In The Arabian Gulf And Indian Ocean, C. 1850-1950, Mansour Alsharidah

Graduate Theses and Dissertations

This dissertation is a history of the economic, social, and political life in Arabia, the Arabian Gulf, and the Indian Subcontinent from the mid-nineteenth to the mid-twentieth centuries. It draws on materials from al-Qasim, Kuwait, Bahrain, Karachi, Bombay, Calcutta, and London, in addition to travelers’ accounts. These materials and accounts are used to explore the extent and significance of al-Qasim’s international trade between Arabia and India through the Arabian Gulf. It further examines how Qasimi merchants mobilized commodities and traded in the port cities of the Arabian Gulf and the Indian Ocean, taking advantage of changing regional and global political …

Visualizing Interdisciplinary Collaborations Within Exercise Science: A Pilot Study, Elizabeth Bjornsen

Graduate Theses and Dissertations

Exercise science is a growing field with sub-disciplines exploring various aspects of physical activity. Diverse perspectives allow the field to answer complex research questions, but little is known about the collaborative nature of exercise science today. Research practices have implications on undergraduate curriculum, likely incorporating experiential knowledge into course subject matter and providing diverse experiences for students entering the workforce. Therefore, the purpose of the pilot study is to visualize and quantify interdisciplinary collaborations within exercise science. Journal citation analysis and an adaptation of social networking theory were utilized to examine collaborative practices of exercise science faculty at the University …

The Attracting Intelligent Minds Conference: An Assessment Of Graduate Diversity Recruitment, Alfred T. Dowe

Graduate Theses and Dissertations

Graduate student recruitment is one of the most important factors in growing university enrollment. Unlike undergraduate recruitment, graduate recruitment is a coordinated effort facilitated between graduate faculty and program coordinators and graduate recruiters who often work outside of the department. An essential element in graduate recruitment is the effectiveness with which underrepresented minorities are identified and recruited. Graduate schools are commonly using initiatives known as intervention strategies to help enhance their traditional recruitment strategies and campus visitation programs have become a popular recruitment tool within those strategies.

Since the 1990’s, the University of Arkansas (UA) has employed various intervention strategies …

Phenotypic Plasticity Of Japanese Medaka Gill In Response To Changing Salinities, Laura V. Ellis

Graduate Theses and Dissertations

Japanese medaka (Oryzais latipes) are euryhaline fish, meaning they are capable of surviving in a variety of salinities from fresh water to seawater. The ability to maintain an internal osmotic concentration stems from the phenotypic plasticity of the osmoregulatory organs, the gill, kidney, intestine, and integument. The gill is the main site of osmotic and ionic regulation in fish due to the three-dimensional structure, the direct contact with the outside environment, and the composition of the gill cells. Fish gills are multifunctional as they regulate water movement, acid/base exchange, nitrogenous waste excretion, and ion fluctuations. In freshwater environments, fish are …

Using Soil Geospatial Properties And Environments To Explore Microbial Diversity, Sharon Faye Smith

Graduate Theses and Dissertations

Soil microorganisms help maintain nutrient cycling, control carbon sequestration, impact plant productivity, and influence several soil chemical and physical properties; yet, the processes that control the microbial composition of soil and how environmental changes may affect the composition and activity of these organisms at different scales remains a difficult and intriguing puzzle for soil scientists, ecologists, and modelers. Wetlands are endangered and important ecosystems that provide several services, which are directly linked to soil function. However, few wetland assessments consider the soil environment and microbial ecology. Linking soil microbial community composition and distribution patterns to soil physio-chemical properties would provide …

Critical Approaches To Digital Video Composition And Media Literacy In Preservice Teacher And High School Contexts: Understanding Students’ Perspectives, Seth D. French

Graduate Theses and Dissertations

The first of the following manuscripts explores graduate-level preservice teachers’ responses to a critical digital video project in the context of a Disciplinary Literacies course. This study was particularly interested in the preservice teachers’ obstacles and collaborations they experienced while completing the project, as well as future applications they envisioned for the project in their own classrooms. Findings reveal common obstacles that many preservice teachers experienced throughout the composition process as well as key differences that contributed to some having a more favorable experience with the project than others. The study also identifies insights preservice teachers gained from the critical …

Rejection Sensitivity And Social Support As Predictors Of Peer Victimization Among Youth With Psychiatric Illness, Katherine C. Hyde

Graduate Theses and Dissertations

In this study, I examined whether rejection sensitivity and perceptions of social support predicted concurrent peer victimization in a sample of adolescents with psychiatric illness. Participants included 43 adolescents, aged 12-18 with diverse psychiatric diagnoses, who were recruited from a summer residential treatment program. Participants completed measures of peer victimization, perceptions of social support, and rejection sensitivity. Participants also completed the global victimization item in the Revised Olweus Bully/Victim Questionnaire, which allowed for comparison of rates of peer victimization across studies (Solberg & Olweus, 2003). Results replicate and extend previous research that indicates adolescents with psychiatric illness experience high rates …

The Use Of Speech-Generating Devices For Preschoolers With Autism Spectrum Disorder, Jessica Miller

Graduate Theses and Dissertations

The first of the following articles provides a review of the literature related to vocalizations among individuals with autism spectrum disorder (ASD) who use augmentative and alternative communication (AAC) systems, with special attention paid to speech-generating devices (SGD). After providing an overview of ASD, evidence-based practices (EBP), and AAC types and a brief history, this review evaluates studies that collected data on vocalizations in SGD-users, including both those that targeted vocalizations as a dependent variable and those that measured vocalizations as a collateral effect without directly targeting it. The goal of this review is to evaluate whether SGD use may …