Digital Commons Network^™

Delaying College For Domestic Civic Service: The Gap Year Experiences Of City Year Americorps Alumni, Christopher John Bryson

Graduate Theses and Dissertations

Over the past decade the concept of taking a gap year has become mainstream in the US. This idea of delaying enrollment, or taking a break from college, before beginning a bachelor’s degree, has gained popularity, especially as the cost of attendance in higher education has soared and the burden of paying for it has been placed on the student as the consumer. Similarly, the sought-after gap year experiences offered in the private sector are often costly. With the rising popularity of gap years, it is important to identify experiences that are accessible to a wide variety of backgrounds and …

Hierarchical Structure And Material Integration For Electrocatalytic Co2 Reduction, Hamed Mehrabi

Graduate Theses and Dissertations

CO2 released by the combustion of fossil fuels is driving significant changes to the earth’sclimate. The natural cycle for removing CO2 from the atmosphere, namely photosynthesis, cannot keep up with the rate at which it is being added. Developing engineering approaches to remove CO2 from the atmosphere is becoming essential to reduce these effects. Removal leads to further issues of carbon sequestration and favorable CO2 reuse strategies, including the electrochemical transformation of recovered CO2 to useful products such as fuels and materials. Copper is an important electrocatalyst for the CO2 reduction reaction (CO2RR) because of its unique capability for producing …

Thinking About Episodic Future Events As A Way To Reduce Smoking Behavior: An Ecological Momentary Assessment Study, Stephanie Joann Kane

Graduate Theses and Dissertations

With nearly 35 million Americans currently estimated to smoke and an approximate seven out of ten adult smokers wanting to quit, it is clear that there is a need for enhanced smoking cessation techniques. Encouraging people to think about a future smoke-free self may help to encourage and motivate changes in smoking behavior. The present study investigated the role of an episodic future thinking manipulation on the motivation to quit smoking using ecological momentary assessment (EMA). Participants (N = 103) were randomly assigned to either an episodic future thinking (EFT) condition or an episodic recent thinking (ERT) condition, and were …

Schools Of Rivals: Physicians, Fights, And Reform In Nineteenth-Century, Southern Medical Education, Laura Elizabeth Smith

Graduate Theses and Dissertations

While the professionalization of medicine in the nineteenth century hinged on community trust, faculty at Southern medical schools hurt their own reputations with their proprietary schools, their public rivalries, and their competition for clinical material and cadavers. Attempts to regulate medical schools also became fodder for doctors to slander each other, all arguing that their methodologies and their schools were superior. This fierce competition resulted from the constant need to lure in more students to ensure these schools’ survival, but it hurt the reputation of doctors as a whole, convincing the public that one doctor seemed just as incompetent and …

Perceptions Of Beginning Secondary Alternatively Licensed Family And Consumer Sciences Teachers In Kansas: A Case Study, Jennifer S. Snell

Graduate Theses and Dissertations

Alternatively licensed Career and Technical Education teacher licensure programs have become a more conventional process for licensing new CTE teachers. Evidence from recent research supports that alternatively licensed teachers have a much greater teacher turnover rate than traditionally licensed teachers. This study focused on Family and Consumer Sciences education, which is part of the umbrella of CTE. There is limited research on new teacher training that specifically supports beginning alternatively licensed secondary FCS teachers in Kansas. This qualitative study examined the experiences of novice alternatively licensed secondary FCS teachers in Kansas who transitioned from the workforce with no previous teacher …

Hybrid Multilevel Converters With Internal Cascaded/Paralleled Structures For Mv Electric Aircraft Applications, Fei Diao

Graduate Theses and Dissertations

Using on-board medium voltage (MV) dc distribution system has been a megatrend for next-generation electric aircraft systems due to its ability to enable a significant system mass reduction. In addition, it makes electric propulsion more feasible using MV power electronic converters. To develop high-performance high-density MV power converters, the emerging silicon carbide (SiC) devices are more attractive than their silicon (Si) counterparts, since the fast switch frequency brought by the SiC can effectively reduce the volume and weight of the filter components and thus increase the converter power density. From the converter topology perspective, with the MV dc distribution, the …

Forging Community In The Ouachita Foothills Of Southwest Arkansas: Duckett Township, Homesteading, Distilling And Race, Lisa C. Childs

Graduate Theses and Dissertations

Community was key to successful subsistence agriculture in Arkansas, especially in the Ouachita foothills in southwest Arkansas (including Polk, Howard, Montgomery, Pike, Garland Counties) and Oklahoma (McCurtain, Pittsburgh, LeFlore Counties) until the 1940s. Nearly a quarter of Arkansas’s land remained in the federal government’s name twenty years after statehood, and even more of the land in the western Ouachita foothills. Much remains unknown about how farming communities were formed in this area from the end of the Civil War until approximately World War II. As seen in the Duckett community in northern Howard County, while family connections were important to …

Therapists’ Demonstrated Multicultural Competence In Treating Latinx Immigrants, Dulce Diaz Benitez

Graduate Theses and Dissertations

Studies suggest that health disparities occur when people from marginalized communities receive care that is inadequate based on their cultural needs (USDHHS, 2011). Multicultural competence (MCC) models have been proposed to provide a framework of the competencies that therapists should develop to work with multicultural populations (Sue et al., 1992). Researchers have questioned the validity of measures, which are mostly based on therapist self-report (Cartwright, 2008). The multicultural case conceptualization ability task has been used in previous studies as a measure of demonstrated cultural competence using a vignette to assess case conceptualization abilities (Ladany et al., 1997). However, it has …

Demarginalizing Black Ordained Women’S Voices In The Black Baptist Church: A Phenomenological Study Of Black Women Ministers’ Lived Experiences When Seeking Cleric Leadership Roles, Angela Mosley-Monts

Graduate Theses and Dissertations

This dissertation sought to understand the living experiences of Black Ordained Women in the Black Baptist Church. The study employs a phenomenological perspective and interviews to gather the voices and lived experiences of ordained Black women ministers who have served in the Black Baptist Church at various times. Womanist Theology and Black Feminism form the theoretical basis of the study. Black ordained women interviewed in this study are currently or formerly associated with the Antioch District Missionary Baptist Association, the Antioch District Congress, and the Regular Arkansas Congress of Christian Education. Although some Black ordained women remain with the Black …

A Study On Interactions Between Metal-Organic Frameworks And Biological Materials, Josh Phipps

Graduate Theses and Dissertations

Metal-organic frameworks or MOFs are an extremely useful tool in many areas of applications. Their popularity in recent years has arisen from their high efficiency in catalytic chemical reactions. This is made possible due to their porous interior and the ability of the MOFs components to be functionalized. These same traits make MOFs excellent for use in protein encapsulation or immobilization and have the potential to become excellent drug carriers. Their development in this utilization has been limited dramatically compared to MOFs chemical applications. This is due in part to the nature of biological processes taking longer to study, but …

A Quantitative Examination Of The Influence Of Social And Structural Communication Variables On The Social Connectedness Of People Experiencing Homelessness, Shawn Michael Evans

Graduate Theses and Dissertations

This thesis examined the influence of social and structural communication variables on the perceived social connectedness of people experiencing homelessness in the Northwest Arkansas (NWA) and Joplin, Missouri areas. This study employed the ecological perspective of communication infrastructure theory (CIT; Ball-Rokeach et al., 2001) and a communication perspective which envisions communicative interaction as constitutive of social experience. Using survey data from 166 participants, this study examined 11 research questions and hypotheses drawn from extant literature on homelessness, social connectedness, and CIT. ANOVAs, t-tests, and hierarchical multiple regression analyses revealed a complex relationship between individuals and the communicative environment. This study …

Streaming Gender, Masculinity, And Race: Luke Cage's Impact On The Marvel Cinematic Universe, Samual Madison Mcmillen

Graduate Theses and Dissertations

Streaming Gender, Masculinity, and Race: Luke Cage’s Impact on the Marvel Cinematic Universe analyzes gender, masculinity, and race in Marvel’s transmedia universe. The analysis examines streaming television’s role in confronting social issues related to gender, masculinity, and race, such as systemic racism, white supremacy, and toxic masculinity. This study examines the impact of three Netflix series on the Marvel Cinematic Universe, Luke Cage, Jessica Jones, and The Defenders, as these series were Marvel’s initial use of streaming television. The character, Luke Cage, appears in each of these Netflix series, and while each series tells a story of its own, the …

Cell Division Dynamics Of Escherichia Coli In Extreme Environments, Steven P. Murray

Graduate Theses and Dissertations

Life is remarkable in how resilient it can be. Many organism, classified as ex- tremophiles, can not only survive in extreme environments, but they can thrive in them. In the search for extraterrestrial life, the best candidates to harbor life exist with some kind of extreme condition. Europa, for example, is a favorite for the possibility of accommodating life as we know it within our solar system. Thought there is believed to be a liquid ocean under its icy surface, this habitat would be under immense pressures and high salinity. To best know where to look for extraterrestrial life, it …

Optimization Of Clostridium Septicum Antigen Production And Evaluation Of Vaccine Administration Parameters For A Candidate Bacterin-Toxoid To Prevent Dermatitis In Commercial Turkeys, Aaron Forga

Graduate Theses and Dissertations

The objective of this thesis was to optimize the hemolytic activity of two isolates of Clostridium septicum to evaluate if hemolytic titer of C. septicum antigen at time of formalin inactivation corresponded to increased serum antibody titer to the C. septicum alpha-toxin of turkeys immunized with an experimental formalin inactivated bacterin-toxoid vaccine. Chapter 1 provides a brief overview of the thesis. Chapter 2 consists of a literature review focused on clostridial dermatitis, specifically C. septicum-associated dermatitis (cellulitis) that affects commercial turkeys. Chapter 3 outlines our attempts to optimize an experimental autogenous bacterin-toxoid vaccine as a potential strategy to mitigate clostridial …

A Comparison Of Student Final Grades In College Algebra Based On Face-To-Face And Online Course Modalities, Christopher Michael Lafata

Graduate Theses and Dissertations

As community colleges emerge from the COVID-19 pandemic there may be a tendency to rely on technology to facilitate more online coursework. Online education has been a fixture of higher education since the mid-1990s, but there’s always been a question as to whether it is effective as traditional, face-to-face coursework. This is especially important in College Algebra, already viewed as a barrier course for many students. If more students take College Algebra online, will the results be as good as students taking the course in a classroom? The purpose of this quantitative causal-comparative study is to identify the relationship between …

Female Adults’ Experiences Of Sexual Harassment And Assault In The Presence Of Others: A Qualitative Analysis Of The Effectiveness And Consequences Of Bystander Intervention Strategies, Kayla Ford

Graduate Theses and Dissertations

Bystander intervention programs aim to reduce the acceptance of violence against women by fostering prosocial behavior from community members, and often provide knowledge on behaviors associated with sexual risk and ways a bystander can intervene. However, there is limited knowledge on which intervention strategies are used, and how these interventions impact perpetrator behavior and incidence of verbal and physical harm to those involved. There is even less research on these phenomena from the perspective of the victim. To address these gaps, the current study utilized a qualitative approach to (1) identify bystander intervention strategies employed; (2) discuss trends of the …

Micronutrient Concentration Effects On Lettuce Growth And Susceptibility To Pythium, Kalyn M. Helms

Graduate Theses and Dissertations

In hydroponic production waterborne pathogens such as Pythium are ubiquitous and continually threaten a wide range of Controlled Environment Agriculture (CEA) crops in hydroponic production, including but not limited to: lettuce, spinach, basil, arugula, cucumber, tomato, sweet pepper, roses, chrysanthemums, and cannabis (Sutton et al., 2006; Gull, 2002; McGehee and Raudales, 2021; Gillespie, 2020). Despite extensive sanitation measures, disease control in hydroponics is fallible and requires constant surveillance and management to minimize outbreaks (Sutton et al., 2006). A potential disease suppression strategy is to increase micronutrient concentrations within hydroponic systems to naturally strengthen plant defenses against pathogens such as Pythium. …

The Impact Of Video-Taped Social Modeling On Alcohol Outcome Expectancies Of Young Adults And The Role Of Social Anxiety, Kyle Kevin Jackson

Graduate Theses and Dissertations

Alcohol outcome expectancies (AOEs) represent people’s ideas about the effects of alcohol (Fromme, 1993). Positive AOEs particularly have been identified as a potential risk factor for hazardous drinking (e.g., Brown et al., 1985). The exact mechanisms that modify AOEs are not fully understood. Further, people higher in social anxiety may be especially receptive to social modeling due to attentional bias shift towards others in social contexts (Rapee & Heimberg, 1997). The current study examined how social anxiety and social modeling associate with AOEs. It was hypothesized that 1) those in the social modeling treatment condition would have higher social anxiety-adjacent …

Thermal Inactivation Kinetics Of Salmonella In Milk Powder As Impacted By Water Activity And Powder Type, Erika Litta Kadas

Graduate Theses and Dissertations

Historically, low-water activity (aw) foods (aw <0.65) were considered to be microbiologically safe for consumption. However, these foods have been implicated in outbreaks of pathogens such as Salmonella enterica, at a frequency that surely challenges this assumption of safety. Although usually implicated in outbreaks involving poultry and egg products, Salmonella spp. have frequently been the culprit in several outbreaks and recalls associated with low-water activity foods (LWAF) due to contamination resulting from the environment, animals, or even the employees during pre-or post-processing. One such LWAF that has been associated with Salmonella spp. outbreaks is milk powder. Milk powders are used in a variety of products ranging from infant formula to confectionary goods. With their widespread use, improving their safety is imperative. A key step in improving their safety is to thoroughly investigate preventive controls related to milk powder processing. The Food Safety Modernization Act (FSMA) established the Preventive Controls for Human Foods Rule, which mandates that processors design and establish a food safety plan outlining any potential hazards and the steps they will take to ensure those hazards do not compromise the safety of the product. Presently, the dairy industry does not have an established kill-step for milk powders post-spray drying. Spray drying may reduce some microbial populations, however, desiccation(e.g., spray drying) is not considered a kill-step. The work outlined in this thesis aims to assist our dairy industry partners in establishing their own thermal process for milk powders post-spray drying. Moisture sorption isotherms of two milk powders (nonfat dry milk: NFDM and a milk protein concentrate with 85% protein content: MPC-85) were determined and showcased that the temperatures at which the isotherms were determined (23, 40, or 60°C) significantly affected both the adsorption and desorption isotherms (p<0.0001) for each powder. Secondly, the thermal inactivation kinetics of Salmonella spp. in both powders were evaluated at two different water activities (0.20 and 0.30) and three temperatures (75, 80, and 85°C) to determine the effect of water activity on the thermal resistance of a cocktail of Salmonella spp. The D-values of Salmonella were heavily influenced by the thermal treatment temperature (p< 0.0001), but not the water activity (p >0.05). The overall findings contained within this thesis provide valuable information about the thermal inactivation kinetics of Salmonella spp. to our partners in the dairy industry so that they may implement an appropriate thermal process for their milk powders.

Multivariate Fairness For Paper Selection, Reem Alsaffar

Graduate Theses and Dissertations

Peer review is the process by which publishers select the best publications for inclusion in a journal or a conference. Bias in the peer review process can impact which papers are selected for inclusion in conferences and journals. Although often implicit, race, gender and other demographics can prevent members of underrepresented groups from presenting at major conferences. To try to avoid bias, many conferences use a double-blind review process to increase fairness during reviewing. However, recent studies argue that the bias has not been removed completely. Our research focuses on developing fair algorithms that correct for these biases and select …

Elis Gruffydd And The Welsh Historical Tradition, Ann Dobbs Riley-Adams

Graduate Theses and Dissertations

Elis Gruffydd’s Cronicl is the longest piece of original prose ever written in the Welsh language, and the first example of writing by a Welsh author for a Welsh audience produced on the Continent. In 2018, Elis’s Cronicl was added to the prestigious UNESCO UK Memory of the World Register, one of only five such recognitions in Wales, giving the Cronicl globally recognized status. Despite this, Elis’s Cronicl is understudied, a “forgotten gem” most of which has never been transcribed, translated, or published in book form. Elis lived and wrote in the British military center and staple port, Calais, which …

In-Field And Greenhouse Assessments Of A Selection Of Preemergent Herbicides On Newly Planted Blackberries, Kayla Knepp

Graduate Theses and Dissertations

This field trial assesses some of the preemergence herbicide options available to growers and their effect on newly transplanted blackberries (Rubus L. subgenus Rubus Watson). Weed control has recently been surveyed as a top priority for blackberry growers; however, limited preemergence herbicides are registered for new blackberry plantings. Weed control is an ongoing component of blackberry production and with few in-season postemergence herbicide options available, growers rely on preemergence herbicides to maintain clean fields. The preemergent herbicides assessed in this trial were chosen with the intention to broaden the chemical control options available to growers in new plantings. A two-year …

Scarico: It’S Only A Movie, Most Of The Time, Thomas Nelson

Graduate Theses and Dissertations

Exploitation cinema is a domain of motion picture content catering to a viewership interested in imagery that is more provocative than what mainstream audiences desire to see. These types of films are typically considered lowbrow entertainment and have been made in every era, albeit in a limited capacity proportional to the niche audience demand for them. Some time periods see a rise in exploitation film productions in response to a growing demand for such content from a larger share of the broader cinematic audience. This relationship indicates that period-specific cultural factors can cause mainstream audience members to seek out more …

Movie Reviews Sentiment Analysis Using Bert, Gibson Nkhata

Graduate Theses and Dissertations

Sentiment analysis (SA) or opinion mining is analysis of emotions and opinions from texts. It is one of the active research areas in Natural Language Processing (NLP). Various approaches have been deployed in the literature to address the problem. These techniques devise complex and sophisticated frameworks in order to attain optimal accuracy with their focus on polarity classification or binary classification. In this paper, we aim to fine-tune BERT in a simple but robust approach for movie reviews sentiment analysis to provide better accuracy than state-of-the-art (SOTA) methods. We start by conducting sentiment classification for every review, followed by computing …

Environmental Communication: Changing The Attitude-Behavioral Gap In Science Communication Utilizing Strategic Messaging, Carrie Helgeson Nelms

Graduate Theses and Dissertations

National Polls in the United States consistently find the public’s beliefs and attitudes about climate change and other environmental issues significantly diverge from those held by the science community. A communication gap between the findings on the causes and effects of environmental issues and the public’s inability to interpret or refuse to accept these findings are possible causes of this divergence. This communication gap constitutes a threat to society because of inaction to environmental problems and points to needed changes in scientific messaging that better informs and motivates behavioral change. The present research employed a strategic message design to affect …

Analysis Of Seismicity And Related Seismic Risk In Muslim Countries: Case Studies From Afghanistan And Pakistan, Ikramuddin Bahram

Graduate Theses and Dissertations

How communities respond to a natural hazard is influenced by how they perceive it. This dissertation evaluated the gap between intent and action regarding earthquake hazards in Muslim countries with a focus on Afghanistan and Pakistan. Cultural biases provided predictions of risk perceptions and risk-taking preferences that were often more powerful than measures of knowledge and experience. In Muslim communities, perception of risk was influenced by the teachings of Islam and related rituals, traditions, and culture.

This study evaluated the seismicity and earthquake hazard in Afghanistan and Pakistan. Assessments of seismic risk and perception of danger were conducted to examine …

The Office Of Possible Projects, Juliette Walker

Graduate Theses and Dissertations

This writing is a companion to the MFA thesis projects that I presented in the Spring 2022 semester at the University of Arkansas in Fayetteville, Arkansas. My thesis work did not exist as a singular, solo exhibition in a traditional gallery space like it did for most of the artists in my graduating cohort; rather, I completed three different but substantial and interrelated projects, many of which occurred outside of traditional art spaces: the Office of Possible Projects at the Fayetteville Public Library, the Cake Stand Biennale which took place across the city of Fayetteville, Arkansas, and the office of …

Allelopathic Effect Of Cereal Straw Extracts On Growth Of Raphidocelis Subcapitata And Microcystis Aeruginosa, Holly Wren

Graduate Theses and Dissertations

Harmful algal blooms are increasing in size, duration, and intensity around the globe. For several decades, cereal straws have been recognized as a viable algal control method, though the mechanisms by which cereal straws inhibit algae remain a topic of research. The objectives of this study were to evaluate the effectiveness of decomposing cereal straw extract, particularly rice (Oryza sativa) and barley (Hordeum vulgare) straw extract, to inhibit the green alga Raphidocelis subcapitata or cyanobacteria Microcystis aeruginosa in bioassays and to determine if the effectiveness of decomposing rice straw extract is altered by the presence of natural organic matter or …

Trauma Treatment For Youth In Foster Care: A Mixed-Methods Study Of Clinician Perspectives And Treatment Model Use, Allison Blake Smith

Graduate Theses and Dissertations

Youth in foster care experience trauma exposure and subsequent trauma-related disorders at much higher rates than their peers, with prevalence rates comparable with veterans of war. Although youth in foster care appear to receive services at higher rates than their peers, little is known about what outpatient care consists of, particularly for trauma-related disorders. Furthermore, although several evidence-based treatments exist for the treatment of child and adolescent trauma, little is known about how appropriate and effective existing treatment approaches are for youth in foster care. The current study used a mixed methods approach to examine a) the range of evidence-based …

Evaluation Of Factors That Contribute To Injury To Quizalofop-Resistant Rice From Quizalofop Applied Postemergence, Navdeep Godara

Graduate Theses and Dissertations

Quizalofop-resistant rice technology allows for over-the-top applications of quizalofop, an acetyl-coenzyme A carboxylase-inhibiting herbicide. However, quizalofop caused significant injury to quizalofop-resistant rice in some Arkansas fields during the first year of commercialization. Experiments evaluated the effect of early-season soil moisture and nitrogen availability; pre-exposure to low rates of glyphosate and imazethapyr; planting date; and environmental conditions including, soil moisture content, air temperature, and light intensity on quizalofop-resistant rice tolerance to quizalofop applications. All experiments assessed sequential quizalofop applications made to 2-leaf followed by 5-leaf stage of rice. Sequential quizalofop applications alone and with surface irrigation or nitrogen application at the …