Digital Commons Network^™

Top-Down & Bottom-Up Approaches To Robot Design, Dylan Michael Covell

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis presents a study of different engineering design methodologies and demonstrates their effectiveness and limitations in actual robot designs. Some of these methods were blended together with focus on providing an easily interpreted project design flow while implementing more bottom-up, or feedback, elements into the design methodology. Typically design methods are learned through experience, and design taught in academia aims to shape and formalize previous experience. Usually, inexperienced engineers are taught approaches resembling the Verein Deutscher Ingenieure (VDI) 2221 process. This method presented by the Association of German Engineers in 2006 is regarded as the general system design process. …

Navigating Abrupt Shifts In Contextual Discourses During A Pandemic And Lack Of Mentorship: A Preservice Teacher’S Journey Developing Critical Pedagogical Discourses, Casey L. King

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study is centered on one English language arts (ELA) preservice teacher’s development of her critical pedagogical discourses (CPD) with the contextual discourses of a school placement for preservice teaching and later shift to a full-time teacher before the placement was complete during a pandemic and in the midst of implementing online learning. Data is drawn from a 4-month interpretive qualitative case study that included classroom observations and semi-structured interviews. The objective for this study included how a preservice teacher uses their beliefs and identity about instruction amid changing contextual discourses in a pandemic and with a lack of mentorship. …

Procurement Fraud Prevention Strategies In Ghanaian Gold Mining Companies, Alfred Ekow Taylor

Walden Dissertations and Doctoral Studies

Procurement fraud occurs at various stages of the procurement lifecycle and can be very costly to organizations. Business managers are concerned with the enormous impact of procurement fraud on business revenue. Grounded in Cressey’s fraud triangle theory, the purpose of this qualitative multiple case study was to explore strategies business managers use to detect, control, and prevent procurement fraud successfully. The participants were six procurement managers in Ghanaian gold mining companies who successfully detected, controlled, and prevented procurement fraud. Data were collected using semistructured interviews and a review of company documents. Through thematic analysis, three themes emerged: (a) internal control …

Understanding Surface Water--Groundwater Connectivity And Discharge In Arctic Deltas, Lindsey N. Aman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Increased warming is driving unprecedented hydrologic changes within arctic deltas with implications for water storage, solute processing, and terrestrial and marine ecology. Thermokarst lakes within Arctic deltas store flood waters and filter solutes and sediments, thus moderating the impact of flood water discharge to arctic seas. However, this moderating influence is diminishing as lakes shrink on annual and seasonal time scales, especially close to active channels where lakes are shrinking most rapidly. This study investigates surface water-groundwater connectivity in arctic delta plains with coupled flow and heat transport models to provide a mechanistic understanding of how lake-channel proximity will impact …

The Effect Of A Standardized Handoff Tool On Communication, Interunit Transitions, And Wait Time: A Quality Improvement Project, Silvia N. Myndresku

Graduate Theses, Dissertations, and Problem Reports (ETD)

This project sought not only to improve the communication and interunit transitions of care between emergency department providers (EDPs) and inpatient providers (IPs) using a standardized handoff tool, but also to reduce the Emergency Room (ED) wait time for patients admitted to the community hospital. The project employed a quantitative quasi-experimental pre-test/post-test design to explore provider satisfaction with an evidence-based standardized handoff tools and wait time. Forty-eight providers completed the survey before the I-PASS implementation, and 43 providers completed the survey post I-PASS implementation. Though not statistically significant, data indicates that wait time increased for the post-implementation months of December, …

The Impact Of Poverty And Gender-Based Disaster Education On Household Preparedness Planning In Male Latino Migrant Workers, Malikah Taylor

Walden Dissertations and Doctoral Studies

Natural disasters cause catastrophic damage to a community through death, injury, and property loss. Urban areas are predisposed to these events due to their built environment and the dense population of vulnerable groups. Urban male Latino migrant workers are an at-risk population with multiple social determinants of health that should be considered when implementing risk reduction plans. Programs that do not target this entire community only enhance the vulnerability of this group. This study examined the relationship between poverty and household preparedness in this community, controlling for gender. The socioecological model provided the foundation for this retrospective secondary analysis. Statistical …

Choosing Not To Participate: Cyber Truancy And Special Education, Elizabeth A. Popielarcheck

Graduate Theses, Dissertations, and Problem Reports (ETD)

This qualitative study investigated facilitators and barriers to participation in online instruction for students in grades 9-12 with a high incidence disability from the perspective of the student and adult in the home (AIH). Three AIH-student dyads participated in questionnaires and an online interview. The interviews were recorded, transcribed verbatim, and then analyzed using the six phases described by Braun and Clarke (2006). Eight categories that aligned with barriers and facilitators to participation were identified: communication, instruction in the home, role of the AIH, attendance, grading, teacher provided student support, overall quality of online learning experience, and suggestions. Categories were …

Associations Between Self-Reported Awe And Heart Rate, Laura E. Bernstein

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fredrickson’s (1998, 2013) broaden and build theory states that positive emotions can expand our social and cognitive awareness and provide health benefits. Some positive emotions, such as awe, may operate differently. We sought to understand how subjective reports of awe, induced through videos, correlate with HR. We know that HR tends to decrease with age (Umetani et al., 1998), individuals have less physiological reactivity as they age (Blanchard-Fields, 2007), and older adults report more positive emotions than negative emotions (Mroczek & Kolarz, 1998). Given these findings, we were interested in understanding whether there were age differences in self-reported awe and …

Small And Micro Business Resources In The Post-Pandemic Period: A Perspective From Local Bridal Boutique Businesses In West Virginia, Ishtehar Sharif Swazan

Graduate Theses, Dissertations, and Problem Reports (ETD)

In widely dispersed small communities, local and regional businesses dominate West Virginia, an eastern state of the United States in the Appalachian Mountains where small and micro businesses constitute 98.9% of all businesses and contributes 49.1% of the state’s total employment. These businesses create jobs, help build a strong financial position for the state, and promote community-building and social activities. These businesses are unique as they sustain themselves while competing with national and regional retail chains and carving out a customer for themselves. However, the damage caused by the spread of Covid-19 is having a devastating effect on the small …

Factors Of Employee Retention Within Youth-Serving Nonprofits In The Mid-Atlantic Region Of The United States, Meleny Thomas

Walden Dissertations and Doctoral Studies

Factors of employee retention have been widely researched and examined. However, research on factors of retention in relation to youth-serving NPOs was limited. Turnover was an issue that many organizations face, but the impacts and implications of turnover for youth-serving nonprofits may be greater. Using Herzberg’s two-factor theory of motivation, this study identified the factors that local and national NPO employees in the Mid-Atlantic region of the eastern United States provided as to why they remained at or left NPOs. The aim of this study was to identify the motivator and/or hygiene factors that employees or former employees of NPOs …

Embodied Energy Geographies: An Exploration Of Fracked Landscapes In The Ohio River Valley, Rachael L. Hood

Graduate Theses, Dissertations, and Problem Reports (ETD)

Methane gas production has boomed across the United States as a result of the development of fracking technology and its associated infrastructures, including pipelines. This production has provoked resistance over a litany of environmental and social concerns at both global and local scales. These concerns are compounded by a history of extractive economies and degradation in the Marcellus shale region of Appalachia and the Ohio River Valley. To date, there has been limited research at the intersection of extractive industry and emotional geography, especially around pipelines. This research draws on feminist, emotional, and energy geographies and uses semi-structured interviews and …

Strategies To Reduce Flight Attendant Voluntary Turnover, Jorge Tobar

Walden Dissertations and Doctoral Studies

Flight attendant voluntary turnover can lead to staffing shortages that can cause severe disruptions to flight schedules, damage the airlines’ reputations, and negatively affect revenues, which are significant challenges for airline leaders. Grounded in Herzberg’s two-factor theory, the purpose of this qualitative multiple-case study was to explore strategies airline leaders use to reduce flight attendant voluntary turnover. Data were collected from four leaders from four U.S. airlines in the southwestern United States using semistructured interviews and reviews of organizational documents. Five themes emerged from thematic analysis: improving compensation and benefits packages, implementing rewards and recognition programs, increasing supervisory support, expanding …

Chemical Characterization Of Clastic Cave Sediments And Insights Into Particle Transport And Storage In Karst Aquifers, Jill L. Riddell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Abstract

Chemical characterization of clastic cave sediments and insights into particle transport and storage in karst aquifers

Jill L. Riddell

Cave sediments can be divided into two groups: precipitates and clastics. Precipitates are speleothems, or lithologic or mineral features that are chemically precipitated in the cave environment. Clastic cave sediments are frequently described by depositional facies, sorting, and particle size (Bosch and White, 2004). Robust analytical chemical analyses of these sediments to quantify their physical and chemical components is rarely performed although some chemical characterization of mineralogy and paleomagnetism has become prevalent in recent years (Chess et al., 2010; Sasowsky …

Targeting Vulnerabilities In Cell State And Calcium Signaling For The Treatment Of Lung Cancer, Clark Jones

Graduate Theses, Dissertations, and Problem Reports (ETD)

Lung cancer remains the deadliest of all cancers due to the high mutational burden associated with the disease. Combating mutational drivers and drug resistance proves to be essential in the development of novel therapies to improve patient outcomes. A first-in-class cyclic peptide known as MTI-101 has been shown to induce necrotic cell death in a caspase independent manner. MTI-101 was derived from the linear peptide known as HYD1 that was found in a high throughput screen to block cell adhesion with the extracellular matrix. The compound was further optimized and cyclized to the currently used MTI-101 that was found to …

Beyond What's Missing: Silence In Women-Authored Novels From Wollstonecraft To Shelley, Kelli Wilhelm

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation responds to and intends to subvert binary interpretations of silence, particularly women’s silences, as representing either submission or resistance to oppressive institutions and societal expectations. I examine five women-authored novels from British Romanticism. The first half of this dissertation focuses on three radical works of the 1790s, Mary Wollstonecraft’s The Wrongs of Woman, Mary Hays’s The Victim of Prejudice, and Charlotte Smith's The Old Manor House. The second half discusses two well-known early nineteenth-century novels, Jane Austen’s Sense and Sensibility and Mary Shelley’s Frankenstein (1818). Through examinations of these novels, I discuss how silence functions …

Staff Education On Hepatitis C Screening Guidelines, Duy Le Trinh

Walden Dissertations and Doctoral Studies

Hepatitis C virus (HCV) is found worldwide, but the burden is much higher in correctional settings compared to general populations. In a detention centered located in Washington, the nurses at booking do not know who are at risk for Hepatitis C. This Doctor of Nursing (DNP) project attempted to answer the question of if educating nursing staff at the detention facility in Washington increase their knowledge of the importance of screening inmates for hepatitis C.The purpose of this project was to educate nursing staff about the risk factors for HCV so that proper screening can be done. Knowles’s adult learning …

Phenomic And Genetic Controls Of The Drought Stress Response In Sorghum, Melissa A. Lehrer

Graduate Theses, Dissertations, and Problem Reports (ETD)

Drought, one of the most common abiotic stressors, is a result of the precipitation and temperature fluctuations influenced by climate change. As consistent weather patterns are crucial for the maintenance of crop yield, drought threatens food security through its impact on plant growth and development. It is essential to ensure the quality, availability, and affordability of grain-based products in the face of climate change due to expectations of population growth. Therefore, shedding light on the mechanisms associated with drought tolerance is integral to maintaining agricultural production under water-limited conditions. My dissertation work aimed to uncover the morphological, physiological, and genetic …

Development Of A Transition Program For Young Adults With Type 1 Diabetes Progressing From Pediatric To Adult Care – A Feasibility Study, Elizabeth Ann Minchau

Graduate Theses, Dissertations, and Problem Reports (ETD)

ABSTRACT

Development of a Transition Program for Young Adults with Type 1 Diabetes Progressing from Pediatric to Adult Care – A Feasibility Study

Elizabeth A. Minchau

Background: Emerging adulthood requires a delicate balance of the competing social, educational, occupational, and financial demands typical of this developmental stage. This time period presents special challenges for adolescents with type 1 diabetes (T1D), who must also prioritize consistent medical follow-up and ongoing intensive self-care. Emerging adults with T1D struggle with glycemic control that is further exacerbated by an often-times disorganized transfer of care between pediatric and adult endocrinology practices. Substantial gaps in care …

Investigating The Mitochondrial Protein Mitoneet In C. Elegans Models Of Aging And Alzheimer's Disease, Jacob Ryan Boos

Graduate Theses, Dissertations, and Problem Reports (ETD)

Oxidative stress is an imbalance between reactive oxygen species production and elimination, favoring the former. Reactive oxygen species serve as important signaling molecules for physiological homeostasis. However, when produced in excess, these once important signaling molecules become detrimental, disrupting cellular functions, and ultimately leading to cell death. In aging, reactive oxygen species production is increased, accompanied with reductions in oxidative stress resistance, increasing the risk for developing age-related diseases including cardiovascular disease, cancer, stroke, and neurodegenerative diseases. The outer mitochondrial membrane iron-sulfur cluster containing protein mitoNEET (CISD1; gene CISD1) has shown to be a mediator of mitochondrial function and …

Performance Of Peltier Cooled Technology During Preconcentration Of Volatile Organic Compounds Analyzed By Gas Chromatography-Mass Spectrometry (Gc-Ms) Using Niosh Manual Of Analytical Methods (Nmam) 3900, Elizabeth Ann Fernandez

Graduate Theses, Dissertations, and Problem Reports (ETD)

Using evacuated canisters for whole-air sampling allows for sampling without specific knowledge of the environment and potential analytes. Evacuated canisters are able to tolerate concentrations ranging from parts per trillion (PPT) to parts per million (PPM). The U.S. Environmental Protection Agency (EPA) has used evacuated canisters for years to sample volatile organic compounds (VOCs) from ambient air using their method TO-15 (LeBouf, et al., 2019). The GC-MS system used for the development of NMAM 3900 used liquid nitrogen to cool sorbent traps in the preconcentrator. Liquid nitrogen allows for cooling of specified points below ambient temperature. An alternative to liquid …

Repercussions: The Pressure To Be Thin, Shuhan Liu

Graduate Theses, Dissertations, and Problem Reports (ETD)

My MFA thesis and supporting exhibition will highlight ceramics work I have created with the intention of dissecting the relationship between a soul and reality to convey the story of tension and anxiety and show it in a way that would let viewers identify with my discomfort and anxiety. The inspiration for my work came from the severe body anxiety that I faced that broke out during the three years of psychological stress caused by the pandemic. Using personal narratives as a starting point, I created object-based artwork that addresses the external pressures I feel to be skinny. As an …

Lessons Learned From Covid-19: Provider Suggestions For Improving Service Delivery In Sexual Violence Resource Centers And Children's Advocacy Centers In Kentucky, Whitney Cassity-Caywood, Matthew Woodward, Austin Griffiths, Alecia Hatfield

Contemporary Rural Social Work Journal

The COVID-19 pandemic has presented unique challenges for human service providers, especially as face-to-face services were limited by both formal and informal efforts to protect public health. Telehealth has emerged as a main strategy to ensure continuity of care. This study explored adaptations to services in child advocacy centers (CACs) and sexual violence resource centers (SVRCs) across the Commonwealth of Kentucky, particularly using telehealth. This study highlights respondents’ suggestions about improving these service delivery systems and the particular emphasis on challenges and strengths of telehealth for reaching those in rural areas.

Collaborative Practices Between General Education And Special Education Teachers In Middle School Inclusion Classrooms, Wanda Ray Washington

Walden Dissertations and Doctoral Studies

To improve the learning of students with disabilities, the collaboration between generaleducation and special education teachers in middle school inclusion classrooms needs to be increased. This basic qualitative study aimed to explore general education and special education teachers’ coteaching relationships in inclusion classrooms. Pratt’s achieving symbiosis theory was used to frame the study. The research question investigated the difficulties middle school general education and special education teachers encountered that prevented them from attaining a symbiotic relationship in the inclusion classroom. A basic qualitative study was used to gain insight from certified, middle school coteachers in inclusion classrooms who taught in …

Talent Management Strategies For Managing Employee Career Advancement At Fortune 500 Companies, Kimberly Chennel Burke

Walden Dissertations and Doctoral Studies

The focus on attracting talent versus an internal focus on advancing talented employees has become costly for corporations. Senior leaders at Fortune 500 companies need to advance the careers of internal employees to achieve their business objectives. Grounded in the path-goal theory, the purpose of this qualitative multiple-case study was to explore the talent management (TM) strategies senior leaders at Fortune 500 companies use to manage the career advancement of internal employees. Methodological triangulation was used to analyze data collected from semistructured interviews and company documentation. The participants were six Fortune 500 leaders in the United States Midwest region who …

Mindfulness, Race-Related Stress, And Relationship Satisfaction Among African American/Black Couples, Leshai Hunt

Walden Dissertations and Doctoral Studies

Research indicated positive correlations between relationship satisfaction and mindfulness among White couples. However, researchers had not examined the relationship between mindfulness and relationship satisfaction among African Americans/Blacks who had experienced race-related stress. Race-related stress affects African Americans/Blacks in their daily lives and relationships. The purpose of this quantitative nonexperimental study was to investigate the relationship between mindfulness, race-related stress, and relationship satisfaction among African Americans/Blacks. Mindfulness relationship theory and Africana womanism were used to guide the study. Survey data were collected from 51 African Americans/Black participants. Results of multiple regression analysis indicated that mindfulness was a statistically significant predictor of …

Links Between Screen Tim, Montessori Preschool Exposure, And Working Memory, Paula Lyn Larsen Mamani

Walden Dissertations and Doctoral Studies

A high-quality, foundational education offers lifelong benefits for young children. The problem is that working memory in pre-school-aged children is declining and could be impaired by the extraneous cognitive load imposed during engagement with screen media apps and/or preschool programs. Although the pedagogical practices associated with Montessori preschool programs have been found supportive of cognitive load germane to learning and improved working memory, they have not been fully considered in relation to preschoolers' screen media use. The cognitive load created by screen media apps could affect their usefulness as learning tools. The purpose of this quantitative study was to discover …

Exploring Implementation Strategies Of Iot Technology In Organizations: Technology, Organization, And Environment, Khanhhung Hoang Pham

Walden Dissertations and Doctoral Studies

AbstractAfter organizations successfully adopt the internet of things (IoT) technology, many corporate information technology (IT) leaders face challenges during the implementation phase. Corporate IT leaders' potential failures in implementing IoT devices may impede organizations from integrating IoT solutions and promoting business benefits. Grounded in technology-organization-environment (TOE) theory, the purpose of this qualitative, pragmatic inquiry study was to explore strategies that corporate IT leaders use to implement IoT technology in their organizations. The participants were six corporate healthcare IT leaders who successfully used implementation strategies for implementing IoT solutions for their organizations. Data were collected using semistructured interviews and industry security …

College Students’ Perceptions Regarding High School Influences On Academic Buoyancy, Jeremy Travis Irwin

Walden Dissertations and Doctoral Studies

The problem addressed by this study is the lack of student input in the development of resources to support academic buoyancy, leading to a gap in educational practices. Academic buoyancy is the ability to successfully deal with academic setbacks and challenges that are typical of the ordinary course of school life. The purpose of this study was to investigate the perceptions of recent high school students regarding the common academic setbacks and challenges they experienced in high school and how high schools could support students experiencing these challenges. Research questions examined participants’ perspective of the common academic setbacks and challenges …

Perceptions Of Implicit Bias In New York City Healthcare System During Covid-19, Kiesha Jackson

Walden Dissertations and Doctoral Studies

Implicit bias has been identified as a significant problem that hinders effective healthcare delivery. The purpose of this qualitative exploratory phenomenological study was to examine whether implicit bias influenced healthcare services for African Americans with comorbidities aged 30 and over living in New York City during the COVID-19 pandemic. Current studies show healthcare disparities, revealing barriers with healthcare delivery; however, they do not disclose a patient’s lived experience qualitatively, which constituted a gap in the literature. The frameworks of the behavioral model of health services use, and social construction and policy design guided this study. Research questions addressed (a) whether …

Middle School Teachers' Perceptions Of Administrator Support, Teacher Retention, And Attrition, Tonya Kabia

Walden Dissertations and Doctoral Studies

Teacher attrition has been an issue in the local urban area resulting in students being taught by teachers and substitutes who may not be knowledgeable about the content. The attrition of experienced teachers is a concern for administrators, fellow teachers, parents, and students. The purpose of this study was to investigate teachers’ perceptions of administrator support, teacher retention, and teacher attrition. Bronfenbrenner’s ecological system theory served as the conceptual framework that guided this study. A basic qualitative research design was used to capture the insights of 10 middle school teachers in an urban district in the eastern United States through …