Digital Commons Network^™

Key Practices In P-6 Integrated Stem Education: A Delphi Panel Investigation, Leah R. Cheek

Graduate Theses and Dissertations

Throughout the past two decades policymakers, practitioners and researchers have been summoned to pursue best practices to address and implement improvements in STEM education for P-12 students (Archer, Moote, MacLeod, Francis, & DeWitt, 2020; Emrey-Arras, 2018; Hodson, 2003; National Research Council, 2012). Irrespective of the longstanding investment of time and resources towards STEM education, students’ patterns of STEM involvement in schools continue to be persistently unchanged (Archer, et al., 2020; Ro & Knight, 2016) and even fewer Americans are entering STEM disciplines in the workforce (National Science Foundation, 2018). The purpose of this three-article dissertation study is to support effective …

The Kids Aren’T Alright: Examining The Spatial Concentration Of Drug Crime Near Schools In Little Rock, Arkansas, Jason Neeley

Graduate Theses and Dissertations

In the last two decades, violence and death stemming from drug activity has become a concern to communities across the country. Increasingly, policymakers and law enforcement agencies have sought to understand where drug activity is located, including in and around schools, and why some places are more susceptible to drug problems than others. The current study explores two related questions: (1) How do drug crimes spatially pattern around schools? and, in turn, (2) What are the neighborhood-level predictors of the concentration of drug crime? Focusing on Little Rock, Arkansas, I examine the spatial distribution of drug offenses and overdoses within …

Talking About Aphasia: A Social Media Analysis Of What Individuals With Aphasia And Communication Partners Convey About Functional Discourse, Anna Williams

Graduate Theses and Dissertations

This study aimed to blend what we know about aphasia and functional communication. Specifically, how individuals with aphasia are functionalizing communication on the social media platform of YouTube. Extensive clinically significant literature exists on functional communication within speech-language pathology that provides practical guidance for clinical applications. Moreover, an emerging theoretical framework on functional communication and aphasia has sparked fresh insights, particularly from the perspective of individuals with aphasia. This perspective holds promise for exploring how individuals and their families leverage social media for functional communication. This study aims to integrate established clinical research findings on functional communication with the evolving …

Using Aac To Build Young Beginning Communicators’ Inclusion In Song Routines, Sydney Miller

Graduate Theses and Dissertations

The present study examined the effectiveness of augmentative and alternative communication (AAC) on preschool-aged beginning communicators’ ability to participate linguistically during song social routines. The AAC used during the intervention phase were visual scene displays (VSDs). VSDs are color-realistic photos, often depicting real people, that are context-rich for the user. VSDs are less demanding and offer the user a way to communicate their thoughts, feelings, or emotions in a more contextualized way. The present study used a multiple-baseline across participants approach. The primary dependent measure was the linguistic participation of each participant using the VSD. The results indicated that each …

Mental Health In College Journalists: Recognizing Causes Of Trauma And Recommendations For Training In College Programs, Sydney R. Mulvenon

Graduate Theses and Dissertations

News reporting serves as an important vehicle for sharing breaking news across diverse communities, yet it often entails significant stressors. Some news reporters may experience trauma while covering challenging stories or navigating negative experiences within the newsroom. Many professionals in journalism have expressed concerns about the lack of awareness of mental health in the field. Addressing this need, this research using a documentary format, explores the need for integrating trauma training and awareness initiative into college-level journalism programs. Drawing on stories from former journalists and other professionals connected to journalism, this documentary highlights the pressing need for trauma-focused coursework to …

A 10 Kv Sic Mosfet Power Module With Optimized System Interface And Electric Field Distribution, Xiaoling Li

Graduate Theses and Dissertations

This dissertation introduces a holistic and systematic design methodology tailored to the 10 kV silicon carbide (SiC) MOSFET power modules to achieve multi-objective optimization with enhanced electric-field (E-field) distribution, minimized common-mode (CM) parasitic capacitance, and reduced system-level parasitic inductances. The proposed approach encompasses two innovative techniques: 1) an electric-potential-oriented module-system interface to reduce system-level parasitic inductance while maximizing insulation capability; 2) stacked substrates with patterned middle layer copper to alleviate the E-field concentration at the triple-point and reduce the maximum E-field without compromising on thermal resistance. The effectiveness of these innovative approaches is substantiated through the development of a 10 …

A Mobile Application Intervention For Insomnia Among College Students, Veronica Floyd

Graduate Theses and Dissertations

Previous studies have found that the prevalence of insomnia among college students is high. This has implications for students mental and physical well-being, academic performance, and the onset of more chronic insomnia symptomology. Cognitive Behavioral Therapy for Insomnia (CBT-I) is the front-line treatment for insomnia, but cost and time are often barriers to treatment access. The goal of this study was to test the feasibility, acceptability, and efficacy of a more cost-effective self-guided version of CBT-I (via mobile application). Fifty-five college students, who were mostly women (82%) and mean age 19.3 (SD = 2.3) years with moderate insomnia symptoms were …

Determination Of Ileal Digestible Phosphorous Values In Various Inorganic Sources Meat And Bone Meal Sources, Jay Hampton

Graduate Theses and Dissertations

Concerns around the economic and environmental consequences of suboptimal or excess dietary P levels in broiler diets has led to increased interest in determining ileal P digestibility values for feed ingredients. Therefore, two experiments (EXP) were conducted to determine the apparent (AID) and standardized ileal digestibility (SID) of P in various inorganic phosphates and meat and bone meals (MBM) using the direct method. In both EXP 1 and 2, ileal samples were collected at 22 d post-hatch from birds fed semi-purified diets based on dextrose and corn starch containing test ingredients and one N and P free (NPF) diet for …

Analysis And Construction Of Artificial Neural Networks For The Heat Equations, And Their Associated Parameters, Depths, And Accuracies., Shakil Ahmed Rafi

Graduate Theses and Dissertations

This dissertation seeks to explore a certain calculus for artificial neural networks. Specifically we will be looking at versions of the heat equation, and exploring strategies on how to approximate them.

Our strategy towards the beginning will be to take a technique called Multi-Level Picard (MLP), and present a simplified version of it showing that it converges to a solution of the equation (^∂/_∂t u_d ) (t, x) = (∇² _x u_d)(t, x).

We will then take a small detour exploring the viscosity super-solution properties of solutions to such …

The Constant String Of Crises: A Critical Discourse Analysis Of Twitter Responses To Celebrity Crisis Communications, Megan Willman

Graduate Theses and Dissertations

Celebrity crises are more prominent in today’s social-media-fueled world than ever before. Public relations teams are hired to handle these instances on behalf of the celebrity, but no one can control the discourse that ensues on social media. The end goal of these teams is to restore trust and reputation with stakeholders and fans. Although there have been many studies on crisis communications, there are few studies thus far that have examined the strategy as well as the discourse of such timely crises. The public figures included in this paper are Ashton Kutcher, Lizzo, Luke Combs, Mila Kunis, and Taylor …

Characterizing The Role Of Chemo-Mechanical Couplings In The Activation Process Of Proteins That Undergo Conformational Changes, Ugochi Isu

Graduate Theses and Dissertations

Proteins are not static entities; rather, they are dynamic macromolecules that undergo conformational changes to perform their biological functions. These structural transitions are often coupled to chemical events such as lipid interactions, or changes in the cellular environment. Understanding the intricate interplay between chemical perturbations and the resulting mechanical response is crucial for elucidating the activation mechanisms of proteins. This dissertation aims to characterize the role of chemo-mechanical couplings in the activation process of two G protein-coupled receptors (GPCRs): Cannabinoid Receptor 1 (CB1) and Metabotropic Glutamate Receptor 1 (mGluR1). We employ molecular dynamics simulations to investigate the conformational landscapes of …

Navigating Transitions: Utilizing Autoethnographic Writing Prompts To Support Nontraditional College Students, Brijet Lynn Beazer

Graduate Theses and Dissertations

This study explores the transition nontraditional students undergo as they embark on their college journey and the unique challenges they face. Leveraging autoethnographic writing prompts as an intervention strategy, the project employed a participatory approach over virtual platforms to capture the tapestry of experiences and connect participants to form a supportive community. Participants included older individuals with work experience, some who experienced parenthood, or those returning after an extended break. Through crafted prompts, individuals shared their academic journey, balancing work, and family responsibilities. The reflections gathered provide valuable data, offering insights into the challenges and triumphs of nontraditional students. The …

Examining The Direct And Mediating Relationship Between Immigration, Family Structure, And Crime: A Community-Level Analysis., Obed Asare

Graduate Theses and Dissertations

ABSTRACT Amidst debate about immigration into the United States, many in the public and varying levels of government have questioned its impact on vital social institutions of social control. Public perception often associates immigrants with increased crime, though empirical research reveals a consistently null or negative association at the community-level. Scholars have proposed that immigrants contribute to community revitalization and foster social control, at least some of which may be tied to the ways that immigration reshapes aggregate family structures across the community. However, few empirical studies examine this important relationship. The current study aims to bridge this gap in …

Understanding Video Modeling Adoption: Perspectives Of Special Education Teachers, Support Specialists And Transition Consultants, Hayot Tuychiev

Graduate Theses and Dissertations

This qualitative study investigates the knowledge, perceptions, and adoption factors of special education teachers and support specialists regarding video modeling (VM) as a vocational intervention for high school students with autism spectrum disorder (ASD). Grounded in Rogers' theory of innovation diffusion, the research explores their understanding of VM, its perceived effectiveness, and the factors influencing its adoption or rejection.This qualitative study investigates special education teachers' knowledge, perceptions, and adoption factors related to Video Modeling (VM) as a vocational intervention for high school students with autism spectrum disorder (ASD). Grounded in Rogers' theory of innovation diffusion, the research explores teachers' understanding …

Three Years Of Abrahamic Accords: A Contemporary Episode Of False Peace, Wael Abdelhafez

Graduate Theses and Dissertations

The Abrahamic Accords mark the latest phase in the peace negotiation efforts concerning the Arab-Israeli conflict. Through diplomatic maneuvers, temptations, and promises, the United States managed to persuade four Arab countries to depart from the principles of the Arab Initiative and instead sign the Abrahamic Accords, establishing full normalization treaties with Israel. Many other countries and significant powers maintain divergent perspectives on the Abrahamic Accords. After three years, The Accords offer numerous potential economic, security, and strategic benefits, with Israel standing to gain the lion's share. This thesis explores the connection between the Frustration-Aggression Theory and the ongoing violence in …

The Causes And Consequences Of Behavioral Plasticity In Anti-Predatory Defense And Mate Choice In Tropical Butterflies, Sushant Potdar

Graduate Theses and Dissertations

Behavioral plasticity, where individuals change their behaviors in response to varying environmental and social conditions, affects major evolutionary trajectories. But how individuals change these behaviors under certain social situations, and what the genetic causes and consequences of such behavioral changes are in response to social environments are yet to be fully understood. I address these questions in the context of anti-predatory behaviors (chapter 1), and mate choice (chapters 2, 3, 4) in tropical butterflies. In the context of anti-predatory behaviors, I found predator-specific behavioral changes in toxic Heliconius butterflies, suggesting variance in predation pressures and butterfly recognition of bird calls. …

Evaluation Of The Effect Of A Commercial Lippia Origanoides Essential Oil Extract On Salmonella Serovar Enteritidis As A Natural Alternative To Antibiotics In The Poultry Industry, Abdiel Atencio

Graduate Theses and Dissertations

The purpose of the present research was to evaluate the bactericidal activity of a microencapsulated Lippia origanoides essential oils (LOEOs) against Salmonella Enteritidis (SE) in an in vitro crop assay and in a prophylactic broiler chicken model using three low doses of the product: 75 ppm, 150 ppm and 300 ppm. Two trials of each assay were conducted. Day-of-hatch male Cobb-Vantress broiler chickens were randomly allotted to one of four groups: 1) positive control group; 2) 75 ppm LOEOs group; 3) 150 ppm LOEOs group; 4) 300 LOEOs group. Chicks were fed and watered ad libitum in heated brooder batteries …

The Interplay Of Chronic Alcohol Misuse And Facial Recognition Abilities, Morgan Wilson

Graduate Theses and Dissertations

Both perpetrators and eyewitnesses of a crime have often been found to be under the influence of alcohol. While research has been conducted on the short-term effect of alcohol on eyewitness memory and lineup performance, little research has investigated the long-term effects of chronic alcohol misuse on facial recognition abilities. The current study investigated the effect of alcohol misuse on facial recognition and whether duration of misuse contributed to this effect. Participants (n = 370) completed an online survey which consisted of a well-tested facial recognition paradigm plus several surveys pertaining to individual differences of interest. We found race match …

A Comparative Examination Of Background Attributes, Criminogenic Factors, Status Changes, And Preparatory Activities Across Ideological And Non-Ideological Mass Shootings, Brynn Schuetter

Graduate Theses and Dissertations

The overall focus of this study is the relevance of extreme ideology as a distinguishing factor underlying the motivational circumstances of mass shootings in the United States over the last few decades. Along with comparatively examining the lethality of mass shootings, background attributes, criminogenic factors, status changes, and preparatory activities are compared across ideological and non-ideological mass shooters. Data are extracted from the Extremist Crime Database (ECDB), the Bias Homicide Database (BHDB), and Schildkraut’s Database on Mass Shootings. Results highlight key differences in offenders’ experiences of personal status changes and engagement in preparatory activities prior to committing mass shootings. These …

Erased From The Curriculum: Studying The Role Curriculum Plays On Students Political Attitudes At The University, Julie Jann Gallagher

Graduate Theses and Dissertations

University curriculum shapes political identity. Most studies focus on secondary education, overlooking the influence of university curriculum and its effect on students’ political attitudes. For this study, I examine the curriculum of three classes: American Government, African American Studies, and Astronomy. I argue that exposure to race-specific curriculum shapes racial identity. The results will suggest that students who take non-race-specific courses are more likely to support racially neutral and colorblind (White Nationalist) attitudes. I argue that curriculum affects students’ political attitudes.

Competition And Criticality In Cortical Neural Circuits Underlie Behavior And Optimize Working Memory, Jacob Harrison Barfield

Graduate Theses and Dissertations

One of the primary goals of neuroscience is to explain how brain function emerges from dynamic interactions among large populations of neurons. A long-standing hypothesis at the interface of physics and neuroscience posits that neural circuits may operate close to the critical point of a phase transition. In this dissertation, we will investigate a new form of criticality and the implications that it has in working memory and the generation of voluntary body movements. We will utilize this new form of criticality to investigate the functional benefits that can be harnessed by operating near the critical point when performing working …

The International Experience: Foreigners In Fayetteville, Khadn Blaine Adderley

Graduate Theses and Dissertations

This project is aimed toward showcasing the stories of some international students who currently attend or recently attended the University of Arkansas and have lived in Fayetteville, Arkansas. With the University of Arkansas being home to a range of international students from all over the world, it’s important to get an understanding from some of those students who leave their home country to spend the next four years as a member of the Fayetteville community. This project is a podcast that is split up into four episodes, highlighting the experiences of international students, University of Arkansas employees who assist with …

Guaraní Sexuality And Contestations Over The Old Way Of Being, Robert Miles Berry

Graduate Theses and Dissertations

The Jesuits in seventeenth century Guairá attempted to shift the sin of adultery and polygyny away from Guaraní men, and onto Guaraní women in their process of evangelization in Paraguay. The Jesuits did so because Guaraní men, as influential patriarchs within the missions, would revolt against the Jesuits or flee the Jesuit missions in response to Jesuit indoctrination that denounced the practice of polygyny. This is evident through two works of the Jesuit Antonio Ruiz de Montoya: one lexical, the Tesoro, and the other narrative, the Conquista. Montoya was directly involved in the founding and maintenance of the Guaraní missions, …

Determining The Climatic Effects Of The Central Atlantic Magmatic Province Across The End Triassic Mass Extinction In The Elliot Formation, Southern Africa, Danielle Elizabeth Oberg

Graduate Theses and Dissertations

Understanding the intricate relation between carbon-cycle perturbations, climate change, and biodiversity stability is crucial in the face of ongoing anthropogenic greenhouse-gas emissions. This thesis explores the impacts of rapid climate change induced by carbon-cycle perturbations and their potential repercussions on global climate. Large igneous provinces, particularly the Central Atlantic Magmatic Province, offer a lens through which to examine the nexus of volcanic activity, mass extinctions, and climate change. The emplacement of Central Atlantic Magmatic Province, covering vast regions across continents, emitted substantial amounts of carbon dioxide, profoundly impacting global climate and ecosystems. The end-Triassic Mass Extinction, attributed to Central Atlantic …

Development Of Genomic Resources And Group Specific Markers For Evaluation Of Genetic Diversity Of Pathogenic Rhizoctonia Species, Juanita Gil Bedoya

Graduate Theses and Dissertations

Rhizoctonia is a complex genus in the phylum Basidiomycota comprised of several taxa distributed across different families in the order Cantharellales. Many species in the genus have been identified as plant pathogens, saprobes, or beneficial mycorrhizal symbionts of orchids. Rhizoctonia isolates are divided into binucleate and multinucleate and then classified into anastomosis groups (AGs) based on the ability of compatible hyphae to fuse. Binucleate Rhizoctonia species (Ceratobasidium spp.) are classified into 21 AGs identified with letters (AG-A to AG-U). Multinucleate Rhizoctonia species (Thanatephorus spp.) are identified with numbers and classified into 14 anastomosis groups (AG-1 to AG-13, and bridging group …

Capabilities Of Sintered Silver As A High Temperature Packaging Material, Bakhtiyar Mohammad Nafis

Graduate Theses and Dissertations

With electrification progressing across many sectors including industry, automotive and aerospace, the power density requirements are changing. The increased power density results in higher and higher ambient temperatures that electronics are exposed to. The response has been to move towards wide bandgap (WBG) semiconductor devices that can withstand much greater temperatures and can operate at much higher voltages than silicon. Additionally, these WBG devices deliver low drain-source on resistance (RDS_on) capabilities, enabling high current power modules that increase power density even further. This also requires the packaging to evolve in order to withstand the new requirements. As a result, researchers …

Decoding Usage And Adoption Behavior Of The Low-Carbon Transportation Market: An Ai-Driven Exploration, Vuban Chowdhury

Graduate Theses and Dissertations

The transportation sector stands as a significant contributor to greenhouse gas emissions in the United States, with its environmental impact steadily escalating over the past few decades. This has prompted government agencies to facilitate the adoption and usage of low-carbon transportation (LCT) options as alternatives to fossil-fuel-powered transportation. LCTs include modes of transportation that minimize the overall carbon footprint of the transportation sector by relying on energy sources that are environmentally sustainable. These sustainable transportation options have also garnered significant interest in the transportation research community. For government agencies and researchers alike, a comprehensive understanding of the adoption and usage …

Oscillith Matara, James Reilly Dickens-Hoffman

Graduate Theses and Dissertations

Oscillith Matara is a series of improvisational acousmatic compositions that explore themes of birth, death, trauma and transformation. Each composition is an entry from a log of my daily practice. This practice is a meditation using electronic instruments as feedback devices to explore my states of consciousness as it relates to my present situation and personal history. The sound generated through this process of reflecting and responding acts as a cathartic medium for processing depression, anxiety and chronic pain. As a thesis exhibition Oscillith Matara is presented as a group of selected works and is performed as a fixed duration …

Standing On The Edge Of A Dream, Parto Ahmadpour Mobarake

Graduate Theses and Dissertations

Standing On the Edge of a Dream delves into the intricate tapestry of lived experiences shaped by relocation, emphasizing the nuanced space that exists between reality and imagination. As an individual who has undergone the transformative journey of immigration, I recognize that the concept of relocation is like standing on the edge of a dream. This notion becomes a living structure, intricately woven with threads from our past, present, and future. My artistic exploration extends beyond my artworks, yet it remains deeply rooted in my personal narratives. The artworks in the exhibition continue to draw inspiration from personal memories and …

Assessing The Evaporation Method For Soil-Water Retention Curve Development And Comparison Of Soil-Water Characteristics Across Different Tillage Practices In A Furrow-Irrigated Corn (Zea Mays L.) System, Jeferson Prass Pimentel

Graduate Theses and Dissertations

The thesis comprises three studies. The first study in this thesis (Chapter I) focused on a six-year corn field experiment to assess the influence of conservation agricultural practices on soil properties and their long-term effects on water-use efficiency and yield. Non-tillage management did not significantly reduce soil bulk density compared to conventional tillage, as no differences were observed between non-tillage and tillage systems throughout the 6-year experiment. There was no difference in total water-use efficiency among soil management practices in 2018, 2019, 2020, and 2021. Even though in one year of the study, a significant 24 kg ha-1 mm-1 improvement …