Digital Commons Network^™

Essays On The Economics Of Sports Wagering Markets, Jacob Lamb

All Dissertations

Economists have long been enamored with using wagering markets and sports data to answer various economic questions. Wagering market data are readily available to answer any number of questions relating to sports and economics. However, most studies surrounding wagering markets have focused on searching for inefficiencies and, consequently, profitable betting strategies against the house. This dissertation takes a different approach, focusing on the information that can be extracted from efficient wagering markets and using that information to answer economic questions. Rather than hunting for inefficiencies, this dissertation confirms the efficiency of wagering markets and uses wagering markets to answer questions …

Vanet Applications Under Loss Scenarios & Evolving Wireless Technology, Adil Alsuhaim

All Dissertations

In this work we study the impact of wireless network impairment on the performance of VANET applications such as Cooperative Adaptive Cruise Control (CACC), and other VANET applications that periodically broadcast messages. We also study the future of VANET application in light of the evolution of radio access technologies (RAT) that are used to exchange messages. Previous work in the literature proposed fallback strategies that utilizes on-board sensors to recover in case of wireless network impairment, those methods assume a fixed time headway value, and do not achieve string stability. In this work, we study the string stability of a …

My Superintendent Journey From Educator To Activist: An Autoethnography Across Three Decades, Betty Bagley

All Dissertations

Superintendents rise to the highest level of professional educational leadership within local communities. National statistics show increasing turnover in that district-level position. Superintendents come and go, which means their accomplishments fade in time. Superintendents rarely tell their stories of successes, failures, pressures, expectations, challenges, or any experiences within their highly visible role. This gap shows a lack of access to superintendents’ perspectives, and that gap may affect current and aspiring superintendents’ potential.

Given a two-century historical gap in the literature about educational leadership with few accounts from superintendents’ perspectives, my study described my journey through three superintendencies from 1993 to …

Enhanced Mobile Networking Using Multi-Connectivity And Packet Duplication In Next-Generation Cellular Networks, Prabodh Mishra

All Dissertations

Modern cellular communication systems need to handle an enormous number of users and large amounts of data, including both users as well as system-oriented data. 5G is the fifth-generation mobile network and a new global wireless standard that follows 4G/LTE networks. The uptake of 5G is expected to be faster than any previous cellular generation, with high expectations of its future impact on the global economy. The next-generation 5G networks are designed to be flexible enough to adapt to modern use cases and be highly modular such that operators would have the flexibility to provide selective features based on user …

Diagnosis Of Urinary Tract Infections And Rapid Molecular Characterization Of Antibiotic Resistance, Mohammed Harris

All Dissertations

Urinary tract infections (UTIs) are one of the most common infectious clinical entities in both community and hospital settings. They have a broad range of clinical severity yet inflict large epidemiological burden of morbidity and mortality on patients and the healthcare system with billions of dollars in cost of treatment. Understanding what methods are optimal for diagnosing UTIs are critical to mitigate the marked impact and cost of these infections.

Chapter 1 and 2 in this work surveys the broad array of diagnostic modalities for UTIs and highlights their advantages and limitations in the context of the current standard of …

Instructional Leadership Practices And Problem-Solving Processes Among Secondary School Principals During The Covid-19 Pandemic, Matthew Moore

All Dissertations

The purpose of this study was to explore principals’ reflections on effective instructional leadership problem-solving and practices during the COVID-19 pandemic. Generally, principals have very few evidence-based guidelines for providing instructional leadership during a global pandemic, presumably, improvising solutions to novel instructional challenges. To generate selected secondary principals’ reflections about instructional challenges during COVID-19, I used the Critical Incident Technique (CIT), an open-ended method developed by Flanagan (1954) for ascertaining participants. I selected 10 secondary school principals from the 20-school district region in a single state in the Charlotte-Atlanta corridor. All began their professional careers as teachers and their service …

A Study On Asymmetric Perfect Vortex: Fractional Orbital Angular Momentum And Nonlinear Interaction, Kunjian Dai

All Dissertations

In this work, the manipulation including generation and detection of the asymmetric perfect vortex (APV) carrying fractional orbital angular momentum (OAM) was demonstrated and discussed. All the manipulation of the modes is in real-time which provides a perfect tool for sensing the dynamic properties of complex media. The OAM-involved nonlinear conversion, specifically the second-harmonic generation (SHG) using the APV and asymmetric Bessel-Gaussian (BG) beams was studied in detail.

The generation and detection of the APV are based on the HOBBIT concept which includes acoustic optical deflector (AOD) and log-polar coordinate transformation optics. The RF signal driving the AOD allows the …

Bridging The Gap Between Phase Behavior And Processing For Renewable And Refinable Carbonaceous Precursors, Graham Tindall

All Dissertations

As a category of materials, engineered carbons, specifically carbon fibers, are first-in-class for properties such as modulus, specific strength, and thermal resilience; however, the inability to directly process atomic carbon necessitates the development and optimization of carbonaceous precursors. Because the structure and properties of carbon are highly dependent on the precursors and requisite processing, numerous materials have been investigated as feedstocks for large-scale production. Although cellulose and rayon were among the first investigated, polyacrylonitrile (PAN) is the current hegemon of carbon fiber precursors. PAN feeds 90% of this market, but it is neither inexpensive nor renewable. Because a significant fraction …

Essays On Manufacturing And Growth, Hugo Vaca Pereira Rocha

All Dissertations

The first chapter of this dissertation studies the role of human capital in generating economic convergence through its impact on manufacturing productivity growth and allocation of labor across sectors of the economy. I confirm and extend existing results showing that productivity in manufacturing – unlike its economy-wide counterpart – has exhibited convergence; that is, countries further behind the technology frontier tend to catch up to those on the frontier. I then show that the convergence in manufacturing is (a) somewhat accelerated by countries’ tertiary education levels and (b) faster in high-tech industries. Perhaps surprisingly, this is not driven by tertiary …

Computational Modeling Of Patterned Membranes And Spacers For Improved Hydrodynamics And Fouling Reduction In Reverse Osmosis Water Treatment Processes, Zuo Zhou

All Dissertations

My research goal is to discover ways to improve the hydrodynamics of reverse osmosis (RO) membrane systems through creative membrane surface patterning and spacer designs. Since concentration polarization (CP) usually promotes membrane fouling, improving hydrodynamics would result in reduced fouling and better membrane performance. With computational fluid dynamics (CFD), we can explore dozens or even hundreds of models with different geometries and boundary conditions. Through plotting their velocity profile, streamlines, shear stress, pressure profile, concentration profile, and so on, we can determine which design would lead to the best performance.

At first, patterned membranes were evaluated and compared with flat …

Meaning Matters: Cognitive Crafting As A Sensemaking Mechanism And Motivational Process To Enhance Gig Driver Well-Being, Gwendolyn Paige Watson

All Dissertations

As the gig work sector of the workforce continues to grow, organizational psychologists must actively contribute to raising the bar for gig drivers (e.g., ride-hailing, food delivery) so that they are not merely surviving but also thriving through their work. In my dissertation, I tested cognitive crafting as a positive meaning-making process that helps gig drivers make sense of their interactions with customers, generates positive, motivating states such as work engagement, and promotes positive outcomes such as work-related well-being and job satisfaction. My dissertation employed a mixed-methods design. The daily diary built on qualitative data results that identified interesting - …

Molecular Dynamics Simulation On Molybdenum Disulfide: Thermal-Mechanical Properties And Phase Transitions Under External Loading, Mahabubur Rahman

All Dissertations

Due to their remarkable properties, transition metal dichalcogenides (TMDs) have received much scientific interest throughout the past decade. Two layers of chalcogen atoms (S, Se, Te) sandwich a layer of transition metal atoms (Mo, W, Ta) to form the three-atom thick unit cell in TMDs. The interaction between TMD "single layers" is mediated by neighboring chalcogen planes and bonded by Van der Waals forces. Due to this weak out-of-plane interaction, bulk samples can be thinned down to a single layer by exfoliation. Among the TMDs, Molybdenum Disulfide (MoS₂) shows promise in the field of electronics, optics, and sensing …

Epidemiological Approaches For Practical Solutions To Pertinent Peanut Problems, Hope Becton

All Dissertations

Peanut is an important food crop grown in the southeastern region of the United States. Diseases are the most yield-limiting component in peanut production with one of the most important being late leaf spot (LLS), caused by Nothopassalora personata (Np). The disease initially appears in the lower canopy as dark brown to black lesions and conidiophores bearing conidia are produced on the abaxial side of the lesion. Np is passively dispersed primarily by wind and rain events. Spore traps were used to detect and quantify conidia captured up to 70 m from an inoculum source and to further assess …

3d Printing With Photopolymerizable Polyester Resins For Resorbable Medical Device Applications, Mathew Murphy Stanford

All Dissertations

In the past decade, the healthcare industry has seen a significant increase in the use of additive manufacturing (AM or “3D printing”) with subsequent improvement in clinical outcomes.As an exceptional AM technology, vat-photopolymerization (VP), often called stereolithography, can create complex structures and has thus been adopted for a range of biomedical applications including surgical guides, temporary implants, and resorbable tissue scaffolds.However, limitations remain in the availability of photopolymerizable resin materials with appropriate mechanical performance, biodegradability, and biocompatibility for application to resorbable medical devices.

The objective of this work was to employ novel photopolymerizable polyester-based macromers in the development of resorbable …

Accessible Virtual Reality For Older Adults, Aaron Gluck

All Dissertations

Virtual reality (VR) has grown significantly since the commercial release of the Oculus Rift in March 2016. This growth accelerated during the COVID-19 pandemic, revolutionizing how individuals and businesses work, socialize, exercise, and stay entertained. However, commercial VR systems are not designed to be accessible to people with disabilities. While researchers have explored aspects of VR accessibility for people with disabilities, there is minimal research on accessible VR for older adults. Older adults (65+) self-report the highest rate of disabilities which may result in VR accessibility barriers, making this the ideal group to study the accessibility of VR.

This dissertation …

Mesoscale Modeling Of Controlled Degradation In Polymer Networks And Melts, Vaibhav Palkar

All Dissertations

Controlled degradation of polymers finds various applications in fields ranging from the design of functional soft materials to recycling of polymers. In several of these applications, the characteristic length scale at which relevant processes occur ranges from nanometers to microns, typically referred to as the mesoscale. Although analytical models and continuum approaches inform our current understanding, analysis of degradation at the mesoscale is exceptionally limited. For modeling degradation at the mesoscale, we use the Dissipative Particle Dynamics (DPD) technique and the LAMMPS simulation software. Within the DPD framework, we model controlled degradation or the breaking of covalent bonds within a …

Two Essays In Human Capital, Illia Polovnikov

All Dissertations

This dissertation is comprised of two essays on human capital. I analyze how early-life human capital boost shapes micro-level outcomes among disadvantaged children in the US. In the second chapter, I study the productivity convergence among OECD countries and evaluate to what extent the labor force’s sectoral allocation (due to different human capital profiles across countries) contributes to it. In the first chapter, which is joint work with Jorge Garc´ia and William Dougan, we analyze a large-scale trial of an early-childhood education program targeting premature, low-birthweight children, thereby oversampling twins. We find that failing to account for this oversampling obscures …

Circumventing Ableism: A Grounded Theory Study Exploring Caregiver Strategies To Promote A Positive Identity, June Furr

All Dissertations

This qualitative research study explores how caregivers and persons with disabilities navigate the rhetoric of disability and caregiving through the interviews of fifteen caregivers and fifteen persons with disabilities using the lens of grounded theory and Burke’s (1952) dramatistic pentad. Significant findings describe how focused disability description can circumvent ableism when rhetorical resources that assist caregivers and persons with disabilities to navigate the rhetoric in disability descriptions are provided. Disability description theory includes the three stages that define, collaborate and revise, and practice and apply a disability description. This qualitative research offers an introduction into the phenomenon of …

Contrasting Public And Private Approaches To Private Land Conservation In The United States: Local Government, Land Trust, And Landowner Viewpoints, Anna Overby

All Dissertations

In the United States (US), low-density, non-contiguous development, termed sprawl, has long been of widespread concern. Since the 1970s, rural residential sprawl, or exurban sprawl, has grown faster than any other development pattern. Exurban sprawl is development beyond the urban/suburban fringe with ties to the urban environment, such as employment and consumption, rather than to rural economies. Exurban sprawl is highly consumptive of land and has implications for conservation, natural resource management, agriculture, and communities. This study explores two main avenues of exurban sprawl prevention in the US: voluntary conservation easements and local government growth management regulations. The use of …

Filth Flies As A Vector For Some Pathogenic Bacteria Transfer, Ahmet Buyukyavuz

All Dissertations

Two separate sets of experiments were conducted to determine the transfer of bacteria by flies. An Escherichia coli ampicillin-resistant strain with a fluorescent gene was used during the experiments. The first set of experiments were divided into two trials to measure the transfer of E. coli by fruit flies to apple slices and bologna during short term exposure. Short time exposure (1, 5 and 15 min) of flies to inoculated apple slices were tested in the first trial to determine the transfer of E. coli to flies. No difference (P>0.05) in the number of bacteria transferred to flies were …

The Perceived Role Of School Counselors In Ramp And Non-Ramp Schools, Rob Rhodes

All Dissertations

The purpose of this study is to explore the perceived roles of elementary and secondary school counselors within schools with comprehensive school counseling programs and those without such programs. Central to this study are questions of how school counselors’ roles are perceived differently within Recognized ASCA Models Program (RAMP) schools and non-RAMP schools. I this study, I examined the American School Counselor Association (ASCA) Professional Mindsets and Behaviors (see Appendix 1), as outlined in the ASCA National Model (ASCA, 2012), as well as school counselors’ professional practices and perceived roles in RAMP and non-RAMP schools.

Through interviews and comparative analysis, …

Nebraska Women In Journalism: The Groundbreakers Before Us And Surrounding Us, Jolie Peal

Honors Program: Senior Projects (Public)

Nebraska women in journalism: The groundbreakers before us and surrounding us is a 30-minute documentary about six Nebraska women and their journeys as journalists. This project seeks to answer the question: “How do women in the media overcome gender bias?” I interviewed six women ranging in age and from a variety of journalistic fields to discover what biases they faced in the industry as well as their advice for young journalists as we enter into a field that is constantly evolving. I discovered that Nebraska women in the media do experience the bias we see throughout the nation and in …

A New Deal For A Right To Work: Confronting Racism And Inequality In The U.S., James A. Gross

The Scholar: St. Mary's Law Review on Race and Social Justice

Whites have always controlled the country’s major economic and political institutions at all levels. Starting with slavery, the enduring and pervasive dogmas of White superiority and Black inferiority, once openly asserted as “keeping Negroes in their place,” were also used to restrict Black men and women to subordinate “negro jobs.” The vast riches of the United States “were available to all who had the enterprise to take them and the good fortune to be White.”

This denial of the right to work in freely chosen endeavors continues to have immense consequences for Black men, women, and children in every aspect …

The Legacy Of Trust Promises: Native American Healthcare (Note), Hailey Trawick

The Scholar: St. Mary's Law Review on Race and Social Justice

From European colonialism to the establishment of the United States, the rights, history, and independence of Native Americans have been systematically stripped away. The American government expanded rapidly, forcibly displacing indigenous populations from their native lands and moving them to reservations with inferior resources and space. During a forced removal, often instituted by treaties between American Indian tribes and the federal government, government officials offered protection and access to resources in exchange for vast tribal land. Although treaty-making with American tribes ended over a century ago, their deleterious and often broken promises continue to haunt us.

Part I of this …

A Twin Study Of Genetic Heritage And Environmental Influences On Tobacco Susceptibility And Initiation On Early Age, Yadi Liu

Capstone Experience: Master of Public Health

Purpose: Tobacco product susceptibility is defined as the interest a person has to start smoking. Tobacco product initiation refers to whether a person has ever used tobacco products. We aim to understand and explain how genetic and environmental factors affect tobacco products' susceptibility and initiation in children. Methods: The classical twin model estimates three sources of variance: additive genetic (A), shared environmental (C), and unique environments (E). Each source of variance is latent and is calculated from the similarity in the correlations of twin pairs on a phenotype. The magnitude of difference in the correlation of a particular …

A Systematic Literature Review On Long-Term Care Quality Improvement Initiatives In The United States, Daisy D. Pang

Capstone Experience: Master of Public Health

As the number of people 65 and older increases due to the baby boomer population, there will be a greater demand for long-term care (LTC) services. Quality improvement in LTC is essential to ensure positive health outcomes, patient satisfaction, and reduction in healthcare costs. The purpose of this systematic literature review is to identify the current quality initiatives for LTC in the United States and evaluate the outcomes, effects, and values of each quality initiative identified to support the claim that current the quality initiatives have a limited effect on quality improvement in LTC settings. The Preferred Reporting Items for …

Cultivating A Robust Safety Culture Through Identifying And Overcoming Barriers Within Organizations, Morgan Shradar

Capstone Experience: Master of Public Health

The hierarchical power structure within healthcare and response teams may impede communication about safety risks and violations. In developing or enhancing the safety culture within the emergency response to infectious disease events in healthcare organizations, the hierarchy of controls can be utilized to evaluate successful transmission prevention or further harm to responding teams. Within the tool, administrative controls focus on policies, procedures, and practices that minimize the risk of exposure/transmission. The idea of a safe culture emerged following the Chernobyl Disaster, in which a combination of human and system failures led to this emergency. Safety culture has been integrated into …

Comprehensive Literature Review: Assessing The Impact Of Covid-19 Policies, School Closures And Social Distancing, On The Mental Health Of School Age Children, Fatuma A. Hassan

Capstone Experience: Master of Public Health

Mental health is vital to the well-being of all individuals, especially children. COVID-19 unveiled a significant public health issue with poor mental health during the pandemic. There is limited literature about the mental health implications of COVID-19 policies for children and adolescents and preventive strategies for future pandemics. This comprehensive literature review seeks to further investigate the mental health impacts of school shutdowns and social distancing, which were nonpharmaceutical strategies, on school-aged children, 5-18 years old, and propose recommendations for public health officials to mitigate the mental health impacts for future pandemics. Additionally, the review aims to highlight the potential …

Exploring How Social Determinants Of Health Affects Rates Of Chronic Obstructive Pulmonary Disease (Copd) In The Des Moines Metro, Kyla Winkelman

Capstone Experience: Master of Public Health

Chronic Obstructive Pulmonary Disease (COPD) is consistently in the top ten leading causes of death and most recently ranked fourth in the United States (Heron, 2021). Research on health disparities and SDOH has increased recently as investigators learn their importance in diagnosing chronic conditions. Several studies show that a person’s life and environment can determine their risk of exposure, susceptibility, course, and disease outcome. UnityPoint Health (UPH) clinics were utilized for this project to explore how the social determinants of health and health disparities affect COPD rates in Des Moines, Iowa. Initial data was obtained surrounding COPD statistics in the …

The Association Of Apgar Score Outcomes With The Number Of Midwife Antenatal Care Visits Among Infants Born To Rohingya Refugees In Cox’S Bazar, Bangladesh, Vickie Doss

Capstone Experience: Master of Public Health

A cross-sectional study was conducted at the HOPE Foundation for Women and Children of Bangladesh Field Hospital in Cox’s Bazar, Bangladesh, to examine the relationship between the number of antenatal care visits (ANCV) and Apgar scores. This study aims to explore the association between the number of ANCV and Apgar scores in neonates born to Rohingya refugee women. The medical records at HOPE Field Hospital of 182 post-delivery Rohingya women in the Mhodhurchora refugee camp were collected through a medical chart review to

obtain the number of ANCV and 1-minute and 5-minute Apgar scores. The Apgar scoring system is a …