Digital Commons Network^™

Study Of Single-Photon Wave-Packets With Atomically Thin Nonlinear Mirrors, Christopher Klenke

Graduate Theses and Dissertations

A novel controlled phase gate for photonic quantum computing is proposed by exploiting the powerful nonlinear optical responses of atomically thin transition metal dichalcogenides (TMDs) and it is shown that such a gate could elicit a π-rad phase shift in the outgoing electric field only in the case of two incident photons and no other cases. Firstly, the motivation for such a gate is developed and then the implementation of monolayer TMDs is presented as a solution to previous realization challenges. The single-mode case of incident photons upon a TMD is derived and is then used to constrain the more …

Reconciling Conflicting Institutional Logics: Community Reinvestment Officers At The Intersection Of Public Policy And Market Forces, Meredith Mckee Adkins

Graduate Theses and Dissertations

Although the public policy literature has traditionally focused on public sector agencies’ roles in the policy implementation process, private sector managers who oversee regulatory mandates for their organizations are also policy actors. These actors operate between multiple conflicting field-level institutional logics that create demands that they must reconcile through their work. In the banking sector, the Community Reinvestment Act (CRA), enacted in 1977, and its associated policies are monitored by the banking regulatory agencies and implemented by the senior managers responsible for these mandates at regulated financial institutions. Simultaneously with their responsibility for the policy mission of the CRA, CRA …

The Effects Of Immersive Virtual Environments On Motivation, Oral Communication, And Instructional Strategy In Efl Classrooms, John Martin Shipko

Graduate Theses and Dissertations

The creation of web-based real-time computer simulations has given language educators incredible new opportunities to create immersive experiences for English as a Foreign Language (EFL) learners. This thesis reviewed 12 empirical studies, 3 previous literature reviews, 3 non-empirical journal articles, and 23 additional background sources investigating the impact of Immersive Virtual Environments (IVE) on EFL learners’ motivation and oral communication in EFL learning. 12 empirical studies were analyzed closely while other sources were used to provide additional information and theoretical insights. The findings indicate that IVEs offer novel ways to connect EFL learners to native-speaking communities where they can acquire …

Performance And Fouling During Bioreactor Harvesting, Da Zhang

Graduate Theses and Dissertations

Tangential flow filtration has many advantages for bioreactor harvesting as the permeate could be introduced directly to the subsequent capture step, the process is easy to scale up, and fouling of the filter is limited by the cross flow. However, membrane fouling has limited its widespread use. This is particularly problematic given the high cell densities encountered today. Here a reverse asymmetric commercial membrane, BioOptimal™ MF-SL (Asahi Kasei), where the more open surface faces the feed stream, and the tighter barrier layer faces the permeate stream, has been investigated for bioreactor harvesting. The open surface contains pores up to 40 …

Diversity, Equity, And Inclusion: Three Essays In The Educational Context, James D. Paul

Graduate Theses and Dissertations

Many universities and K-12 public school systems express a significant, formal commitment to the ideals of diversity, equity, and inclusion (DEI). Relative to the emphasis on DEI in America’s educational institutions, however, there has been little research describing DEI trends and evaluating the efficacy of DEI bureaucracies. This three-chapter dissertation examines DEI trends that have been the subject of much discussion—but rarely studied empirically.

For example, chapter one analyzes how universities promote DEI when hiring new faculty. I audit a subset of academic job postings and present the first evidence on how many require DEI statements, as well as the …

The Role Of Temperature Variation On Macrophage Physiology And Function In Vitro In Mice, Chicken, And Fish, Intisar Abdullah Hassan

Graduate Theses and Dissertations

Fever is an essential component of the immune response. Baseline body temperatures vary in different species, and fever represents increased temperature over baseline. Fever initiates and enhances immune responses as well as creates an environment in which the body has advantages over pathogens. Macrophages are often the first line of cells that come in contact with pathogens, asthey reside in and traffic through tissues. They are important for their engulfment of pathogens that results in the digestion of the pathogen, and they also produce nitric oxide and cytokines that contribute to immune responses in a variety of ways, including initiating …

Expression Of Claudins In Gill And Opercular Membranes In Relation To Osmoregulation In Euryhaline Atlantic Killifish, Fundulus Heteroclitus, Allison Mcfarland

Graduate Theses and Dissertations

Atlantic killifish (Fundulus heteroclitus) are euryhaline teleosts, which means they can thrive in environments with varying salinities, ranging from concentrated seawater (SW) to dilute fresh water (FW) and thus survive in estuaries. To be able to maintain ionic and osmotic homeostasis in these diverse salinities, osmoregulatory organs like gill and opercular membrane must be able to adjust the permeability and transport of water and ions. The surface epithelia in these organs need to prevent the passive flux of ions and water in a drastically changing environment, while being able to switch between active ion secretion or uptake dependent upon environmental …

Patterns Of Evolutionary Conservation And Divergence In The Short-Term Hyposalinity Stress Response Of A Euryhaline Diatom, Skeletonema Marinoi, Kathryn Judy

Graduate Theses and Dissertations

Survival under fluctuating environmental conditions, such as those increasing in frequency and magnitude under environmental change, requires a successful response to stress. Interspecific differences in stress responses may result in differential survival of species, even within a lineage. Diatoms may constitute one such lineage, as salinity tolerance among extant species is diverse, and the observation of frequent historic habitat transitions between marine and freshwater environments indicates that diatoms successfully mitigated (low) salinity stress in the past, followed by adaptation and diversification over evolutionary time scales. To understand to what extent the diatom hypoosmotic stress response consists of conserved and variable …

Meet Everyone With Art At Location And Time; M.E.A.L.T. Phase 1, Michael Louis Leblanc

Graduate Theses and Dissertations

As an artist who participates in socially engaged arts, it is paramount in my practice to cultivate the balanced power relationship between the audience and artist by providing an ongoing safe environment, accessible subject matter and venue location, and a mechanism that not only calls for participation from the audience but empowers them through direct action. Meet Everyone with Art at Location and Time or M. E. A. L. T. Phase 1 is a mobilizable art exhibition with the long-term goal to meet the audience where they are and to offer an alternative to traditional person-to-person interaction and socializing.

M. …

A Boy Born On Wednesday, Charles Krampah

Graduate Theses and Dissertations

My relocation to America has presented an unprecedented space for self-examination. The components of my identity and personality have been laid bare before me; My blackness in the face of racism and white hegemony, my African heritage in the face of post-colonialism and imperialism, and my faith in the face of an increasingly secular western culture.

Am I who thought I was? Am I more or less? Why do I feel like a different person, and what does this mean for my future?

My research and art practice serve as a form of introspection. I tell an internal story in …

As The Sun Yellows The Green Of The Maple Tree, Adam Fulwiler

Graduate Theses and Dissertations

As the Sun Yellows the Green of the Maple Tree is a body of paintings investigating communication, improvisation, play, and painting’s capacity for transformation.

Reflecting on my childhood spent with my brother, Austin, who experiences sensory differences due to autism, I establish a painted space that is both forcibly disjointed and meaningfully connected, invoking the uncertainty and complexity of perception and communication. Through chromatic nuance, physicality, representational ambiguity, and visual tempo, I invite the viewer into the act of slow looking—to encounter each work as a living, breathing, individual entity.

In the studio, I invent rules and aleatoric devices, mimicking …

Boring Magic, Madison Svendgard

Graduate Theses and Dissertations

Boring Magic encompasses an interest in labor, boredom, and exhaustion. Simultaneously, I am exploring what relief and escapism from these things look like. Escapism acts as the core of my work- what escapism looks like and what creates the need for escapism. I create narrative pieces that are always slightly removed from reality as a way to reflect on what I view as present-day dystopias. The worlds built to create this work are a combination of my lived experiences and invented characters and stories, which culminate in an alternate timeline set in the late 1990s and early 2000s. Relating to …

Invisible Until, Markeith Woods

Graduate Theses and Dissertations

“Invisible Until” explores my personal experiences while working full time at Tyson Foods in Pine Bluff, AR up until moving to Fayetteville for graduate school. The body of artwork comes from reflecting on past a present while drawing from inspiration from Jacob Lawrence, Kerry James Marshall, Jordan Casteel, and more. Using history as a tool to break down the American struggle I used conversations amongst my high school classmates to pull from their direct experiences to convey life and what it means to come from Pine Bluff. By using real people and their life events of trying to achieve progress, …

Nba: No (Anti-) Blackness Allowed, Rontaye M. Butler

Graduate Theses and Dissertations

This paper serves as the foundational pillar in my art practice. This paper combines my experiences, influences, motivations, hopes, dreams, methodologies, historical research and contemporary analyses into a single document ripe for revisions. This document lives and breathes; its contents are constantly evolving, and should be continually challenged and evaluated for relevancy and validity. Part memoir, part manifesto, and part artist statement, it establishes where my work sits in the canon of fine art, even as I don’t know yet what that means. My writings, visual artworks and all other creative actions are tethered to this document and vice versa. …

An Investigation Of Factors Affecting The Rooting Ability Of Hardwood Muscadine Cuttings And Genetic Diversity Of Wild And Cultivated Muscadine Grapes (Vitis Rotundifolia Michx.), Kenneth Buck

Graduate Theses and Dissertations

The muscadine (Vitis rotundifolia syn. Muscadinia rotundifolia) is a grape species native to the southeastern United States. Muscadines are one of three grape species in subgenus Muscadinia with a chromosome number of 2n=40 (V. rotundifolia, V. munsoniana, and V. popenoei), making them genetically distinct from the European wine and table grape (Vitis vinifera) and other species in subgenus Euvitis. Rooting hardwood cuttings from muscadine vines has traditionally been considered an exceptionally difficult task. Many previous studies observed almost no root formation, leading to a general consensus that muscadines should either be propagated by softwood cuttings or vegetative layering. However, the …

Studying Acetylation Of Aconitase Isozymes By Genetic Code Expansion, Jessica Araujo

Graduate Theses and Dissertations

The tricarboxylic acid (TCA) cycle is a very important, centrally located, energy-producing pathway that connects numerous other metabolic and regulatory pathways. Enzymes of this cycle have been more recently implicated in various cancers and neurometabolic disorders, however, the exact mechanism by which this happens becomes quite complex when considering the potential modification of these enzymes and the presence of multiple forms of the enzymes and therefore there is much to be studied in this area.

Aconitase has become a recent enzyme of interest as its substrate, citrate, has been found to play a major role in many vital processes within …

Improving Gifted And Talented Education In Arkansas: Identification, Academic Benefits, And Local Norms, Bich Thi Ngoc Tran

Graduate Theses and Dissertations

In the United States, education policies differ from state to state. Local research, therefore, is important to inform educators, policymakers, and researchers on the ground. This dissertation leverages ten years of administrative data to study three questions about gifted and talented (G/T) identification and education in Arkansas: does the current system identify the right students? Are gifted and talented programs beneficial for students? And, how can we improve diversity in gifted and talented education? Leveraging logistic regression, mixed-effects models, and descriptive statistics, I sought to provide answers to these three questions. First, are academically ready students from low-income families being …

Hallucinogenic Neoshamanism As Antimodernism: Development And Ethical Considerations, Ethan Thompson

Graduate Theses and Dissertations

Humans have been using hallucinogenic plants and fungi for thousands of years. Historically, people around the world have made use of these substances to aid in their spiritual development. Studies of the usage of hallucinogens in indigenous societies often use the term “shamanism” to characterize the associated system of belief and ritual practices. In popular understanding, shamanism is a religious system that features highly ritualized performances in which a practitioner (shaman) utilizes an altered state of consciousness to gain access to realms inhabited by spirits with the intent of recruiting their help to resolve a problem, cure a patient, correct …

“All Skinfolk Ain’T Kinfolk”: Attributions Of Race-Based Discrimination When An Ingroup Member Is The Perpetrator, Christin Alexandra Mujica

Graduate Theses and Dissertations

Most research addressing racial/ethnic discrimination is focused on instances perpetrated by White people or someone not of the same race or ethnic background as the target (i.e., outgroup discrimination). However, based on theories of ethnic identity development and internalized racism, it is possible for people of color to discriminate against people in their own racial or ethnic group. The current study used a qualitative approach to 1) understand what people of color believe about racism and discrimination broadly and based on the race of the perpetrator, 2) describe under what situations (e.g., race of perpetrator or overtness/subtlety of the act) …

Photoassisted Nanoscale Memory Resistors, Amir Shariffar

Graduate Theses and Dissertations

Memristors or memory resistors are promising two-terminal devices, which have the potential to revolutionize current electronic memory technologies. Memristors have been extensively investigated and reported to be practical devices, although they still suffer from poor stability, low retention time, and laborious fabrication processes.

The primary aim of this project was to achieve a device structure of quantum dots or thin films to address a fundamental challenge of unstable resistive switching behavior in memristors. Moreover, we aimed to investigate the effects of light illumination in terms of intensity and wavelength on the performance of the fabricated memristor. The parameters such as …

Evaluation Of Fenclorim Safener For Use In Rice With Group 15 Herbicides, Tristen Heath Avent

Graduate Theses and Dissertations

The development of herbicide resistance and the lack of effective herbicides to control problematic weeds has caused Arkansas rice (Oryza sativa L.) production to pursue alternative sites of action. Currently, very long-chain fatty acid elongase inhibitors are not labeled for U.S. rice production but have been widely used for Asian rice production systems. Previous research has demonstrated the utility of acetochlor and pyroxasulfone to provide in-season weed control for Arkansas rice production, but variable crop tolerance has been observed. Additionally, acetochlor at 1,260 g ai ha-1 elicited less rice injury when seeds were treated with a herbicide safener seed treatment …

Mobile Technology For Language Learning And Instruction: Investigating Beliefs And Attitudes Of Indonesian Efl Preservice Teachers, Dodi Siraj Muamar Zain

Graduate Theses and Dissertations

This study is primarily aimed to investigate beliefs and attitudes of Indonesian EFL preservice teachers toward the use of mobile devices such as smartphones or tablets for learning and instructional practice in Indonesia. Furthermore, this phenomenological study attempted to reveal the factors affecting these two constructs from 20 Indonesian EFL preservice teachers through semi-structured interviews. The findings revealed participants’ beliefs that mobile devices could positively contribute to the development of language performance as learning tools and the development of language instruction as instructional tools. Regarding attitudes of EFL preservice teachers toward the use of mobile devices for learning and teaching, …

Exploring (Mis)Alignments Between First-Year Students’ Expectations And Experiences, Matthew G. Meyers

Graduate Theses and Dissertations

Understanding what expectations first-year students have for their first semester of college can help university faculty, staff, and administrators have a better understanding of how to best provide support and resources that meet the needs of their students and lay the necessary foundations for their academic and social success early on. Unfortunately, many students report a variety of social, academic, personal, and environmental experiences that do not fully match their expectations. The purpose of this study was to examine what expectations and experiences first-year college students had about their first semester and how they interpreted both alignments and misalignments between …

A Social Media Strategy Plan For The Jane B. Gearhart Full Circle Food Pantry, Sara Katelyn Holm

Graduate Theses and Dissertations

The Jane B. Gearhart (JBG) Full Circle Food Pantry is a student-led program that provides food assistance for members of the University of Arkansas community. This thesis project includes a social media strategy plan that aims to increase the overall awareness of the pantry and its multifaceted services to decrease food insecurity levels at the University of Arkansas. This plan intends to create behavioral changes that expand usage of the pantry and social media engagement among UA students. Grounded in data-driven insights, this plan is designed from (i) literature on food pantry marketing techniques; (ii) a review of the pantry's …

An Epidemic Of Skepticism: Examining Right-Wing Populist Responses To The Covid-19 Crisis In Germany, Rachel Moline

Graduate Theses and Dissertations

This thesis examines the role of far-right populist groups in the framing of global health crises. To understand the impact far-right populism has had on the response to health crises, I will be analyzing the case of the Alternativ für Deutschland (AfD), or Alternative for Germany, and their response to the ongoing coronavirus pandemic. I evaluate three distinct time periods in the AfD’s history and determine how the AfD has framed and reframed its crisis narrative in response to the coronavirus compared to previous crises, such as the refugee crisis of 2015. I hypothesize that new crises will lead far-right …

The Effects Of Alcohol Intoxication And Threats To Masculinity On Engagement In Sexual Aggression: Results From A Web-Based Survey Design And Alcohol Administration Study, Tiffany Lynn Marcantonio

Graduate Theses and Dissertations

Background: Research examining the combined effects of men’s alcohol consumption and perceptions of their masculinity as precarious (e.g., viewing masculinity as easily threatened) on sexual aggression (SA) is lacking. The goal of this dissertation study was to assess if alcohol consumption and precarious masculinity are related to men’s SA via a web-administered survey (Study 1) and an in-person alcohol administration experiment (Study 2).

Methodology: In Study 1, two samples of young adult men (aged 18-30) were collected, 1) a community sample of 492 men and 2) a college sample of 478 men, to complete a 20-minute survey; participants answered questions …

The Lived Experiences Of Transmasculine Speakers: A Phenomenological Investigation Of Vocal Quality And Function In Relation To Gender, Micah Wylie

Graduate Theses and Dissertations

The objective of this study was to learn how transmasculine individuals perceive the quality and function of their voices, and how those perceptions influence how they experience gender identity and communicate with others. This qualitative study adopted a hermeneutical phenomenological approach that involved using content analysis and thematic analysis to describe and interpret phenomena. This approach assumes that the researcher is not biased, but is a part of the world being studied and, therefore, understands the phenomenon by interpretive means. Saturation was achieved when all relevant information was introduced, and patterns of information had been identified. Sixteen interviews were conducted. …

100 Million, Cade Scott

Graduate Theses and Dissertations

Alec, an 18-year-old filmmaker, decides to bunk with a group of TikTok stars in a mansion in the suburbs of LA in hopes of becoming as famous as them one day. But, he soon finds out that they plan to keep him behind the scenes. Forced to continue helping them film and post their videos, he starts witnessing shady events involving his step-brother, Kevin. The events reach a crescendo when some of the TikTok stars accidentally disappear. Alec investigates and discovers a sinister plot, and then he finds himself in a fight for his life. Which ends with him narrowly …

Optimizing Virus Prefiltration For Biopharmaceutical Manufacturing, Solomon Isu

Graduate Theses and Dissertations

Virus filters are single-use devices that use a size-based separation process. In virus filters, contaminating virus particles are retained while the therapeutic molecules pass through the membrane pores. Virus filters are an essential component of the overall virus clearance strategy. Sections 1 and 2 of this dissertation provide an introduction and extensive review of monoclonal antibody (mAb) process development, where virus filtration is pivotal. In section 3, prefiltration studies were performed with an industrially relevant IgG1 type mAb using adsorptive and size-exclusion-based prefilters with different mechanisms of action. This mAb has an isoelectric point range of 7.1 to 8.0 and …

Exploring Higher Weight Women's Experiences Of Provider Weight Stigma, Meredith W. Moore

Graduate Theses and Dissertations

The purpose of this phenomenological study is to explore the phenomena of weight stigma as experienced by higher weight women in mental health treatment who also engage in restrictive eating behaviors. Women in larger bodies who are emotionally or behaviorally restrictive in their eating behaviors face a unique set of challenges and barriers. These include challenges due the disordered eating behaviors themselves, along with barriers related to weight stigma perpetuated by the mental health providers treating them (Harrop, 2019). Distinct hurdles to proper treatment including delay of diagnosis, longer duration of symptoms, and increased distress related to eating and body …