Digital Commons Network^™

Green Spaces And Socioeconomic Disparities In São Paulo City, Brazil: A Spatial Analysis Approach, Flavia Vieira Xavier

Graduate Research Theses & Dissertations

Urban green spaces are an invaluable asset for the benefits they provide to human well-being and environmental sustainability. São Paulo, one of the largest cities in the world, well-known for its demographic complexity, prosperous economy, and cultural diversity, presents great disparities in the distribution and quality of green spaces. Besides that, different socioeconomic groups have different access to these spaces. The significant challenge to achieving equitable urban development invites us to investigate these spaces further, associated with socioeconomic parameters, to understand which groups benefit most from urban green spaces and to advance in the environmental justice discussion. This dissertation contains …

How Students On A Healthcare Track Value Learning Communication Skills, Christina M. Cline

Graduate Research Theses & Dissertations

Communication is a critical component of effective healthcare. Students interested in going into healthcare fields require training to learn how to effectively communicate. These students have a need to learn communication skills. Understanding students’ value for learning these skills is necessary for increasing the motivation to learn. In this study, a mixed method approach was used to investigate the value that students on a healthcare track had for learning communication skills. Quantitative methods were used to develop a survey measuring student value and then evaluate students’ value when completing a communication skills activity in a gross human anatomy course. Qualitative …

Using Ex-Situ And In-Situ Mössbauer Spectroscopy To Study The Degradation Of Nafe(1−X)(Ni0.5mn0.5)X O2 Batteries, Iddrisu Bachokun Abdul Razak

Graduate Research Theses & Dissertations

Sodium-ion batteries are an attractive alternative to traditional lithium-ion batteries due to their low cost and eco-friendly components. The Fe3+/Fe4+ redox reaction provides similar operating voltages and specific energy densities to that of lithium-ion batteries. Mössbauer spectroscopy is a useful x-ray technique for measuring the chemical environment inside of the metal enclosure of batteries. In particular, it can measure the relative concentration of Fe3+/Fe4+ ions as a function of the battery’s voltage. In this dissertation ex-situ and in-situ Mössbauer spectroscopy were used to map out the effect of various electrolytes on the performance of NaFe(1−x)(Ni0.5Mn0.5)xO2 batteries. This was done by …

The Future Of Convective Mode In The United States, Jeremy Malcolm Corner

Graduate Research Theses & Dissertations

This work examines potential changes in convective mode associated with hazardous convective weather (HCW) using a suite of high-resolution regional climate simulations and artificial intelligence/machine learning (AI/ML). An AI/ML model called a convolutional neural network (CNN) is first generated and validated using an existing dataset of composite reflectivity images centered on tornado reports from 1996 – 2017 called SVRIMG (SeVeRe IMaGes). Each image in SVRIMG is annotated with four possible convective modes: 1) cellular; 2) mixed mode; 3) linear; and 4) other. The best-performing model, which achieves an accuracy exceeding 90% on testing images, is then used to diagnose storm …

Academic Grouping And School Sense Of Belonging: An Interpretive Phenomenological Analysis Of Middle School Student Voices, Kevin Cox

Graduate Research Theses & Dissertations

School sense of belonging is critical for students’ academic achievement and emotional well-being. The development of a sense of school belonging is influenced by direct and indirect factors within the school environment. Categorization into low and high achievement groups based on academics is a process largely outside the direct control of a student. This study employed an interpretive phenomenological analysis of interviews conducted with 17 seventh- and eighth-grade students about their belonging experience in a Midwestern public middle school. Experiences of students academically categorized as high, typical, or low achievers were compared and described in the context of three emergent …

Evaluating Computational Reproducibility Of Jupyter Notebooks Using Machine Learning And Natural Language Processing, A S M Shahadat Hossain

Graduate Research Theses & Dissertations

In recent years, computational reproducibility, which refers to achieving consistent results upon rerunning an experiment, has become one of the major concerns of various research communities. Jupyter Notebook, as a web-based computational notebook application, offers useful features for running and publishing computational experiments through interactive environments. However, rerunning notebooks does not always reproduce the experimental results. This thesis aims to develop novel methods to evaluate reproducibility by comparing different types of outputs between original and rerun notebooks. It also explores the idea of using machine learning models to predict reproducibility of notebooks automatically without the need of rerunning them. Through …

Essays On Institutions And Business Performance In A Less-Developed Economy, Obinna Franklin Ezeibekwe

Graduate Research Theses & Dissertations

The dissertation comprises three essays that collectively contribute novel insights into the impact of institutional and regulatory factors on firm performance in Nigeria.

The first essay presents the first empirical assessment of the causal heterogeneous effects of competition from informal firms on the revenue of Nigerian formal firms using quantile regression, causal mediation analysis, and non-parametric preprocessing matching. The theoretical framework mathematically depicts how informality determines formal firm revenue by influencing prices.

In the second essay, I provide the first empirical assessment of the causal impact of bureaucratic corruption on firms' financial constraints in Nigeria by calculating treatment effects using …

Evaluation Of Conservation Strategies For Blanding’S Turtles (Emydoidea Blandingii), Callie Klatt Golba

Graduate Research Theses & Dissertations

Across the globe, biodiversity is threatened due to anthropogenic changes to the environment and large numbers of freshwater species, especially turtles, are facing population declines. Resources for conservation are limited, making empirically based conservation planning of utmost importance. Effective management strategies incorporate relevant biological information to outline specific and feasible actions that will mitigate the greatest threats to a species. Blanding’s Turtles (Emydoidea blandingii) are a long-lived, semi-aquatic, freshwater species that are classified as endangered in Illinois and internationally. As with other species of concern, Blanding’s Turtles are threatened by habitat loss, fragmentation, and degradation. They are also threatened by …

Domesticating Luxury: A Comparative Study Of Moche Fineware Distribution Within The Moche Valleys, Annalisa Fallon Amber

Graduate Research Theses & Dissertations

This study examines 188 vessels from the Moche Valley in northern Peru that are listed in the Museo Larco online collection, to determine the distribution of Moche bulk luxury items like ceramics from urban centers to surrounding towns and rural communities. For the study, "bulk luxury" refers to the widespread availability of elite goods that are produced in large quantities but retain a sense of high status among a wide range of people. These items commonly appear in the form of bottle neck sculptural stirrup handle vessels. This definition serves as a heuristic tool to explore the role of these …

A Comparison Of Academic Achievement And Psychological Symptoms In Homeschooled And Traditionally Schooled Children: Accounting For Demographic And Family Characteristics, Lauren Elizabeth Hauck

Graduate Research Theses & Dissertations

The prevalence of homeschooling is increasing, especially in the aftermath of the COVID-19 pandemic. However, methodologically strong research examining how children's well-being may differ based on their schooling type (i.e., homeschooled vs. traditionally schooled) is rare. This study is a response to a call for advancing the methodological rigor and expanding our understanding of family contributions to differences between homeschooled and traditionally schooled children’s adjustment. Thus, the study aims to determine if differences between homeschooled and traditionally schooled (i.e., attending public school) children’s academic and emotional adjustment are present after accounting for both family demographic characteristics and parenting and home …

Modern-Day Storyliving In Immersive Learning Environments: The Impact Of Cinematic Virtual Reality On Adolescents’ Empathy And Sympathy, Andrea Armour Trudeau

Graduate Research Theses & Dissertations

With virtual reality (VR) tools becoming increasingly prevalent in K-12 schools today, educators now possess the means to transport students to digitally simulated times and places without ever leaving the classroom. However, current application of this experiential technology is in its nascent stage and subsequent research is often limited to science- and engineering-related courses at the secondary level. Moreover, a notable gap exists in studies exploring the effects of storyliving in VR specifically for K-12 students with present research focusing on adult participants. Thus, this comprehensive research study investigated the impact of cinematic virtual reality (CVR) on seventh-grade students’ empathic …

Ascertaining A Biochemical Approach To Chlorophyll D Biosynthesis In Acaryochloris Spp., Rashmi Shivni

Graduate Research Theses & Dissertations

Photosynthesis is one of the most abundant metabolic systems on Earth, and specifically, oxygenic photosynthesis primed the planet for complex, multicellular life. The hallmark of modern oxygenic photosynthesis is the photopigment chlorophyll a found in nearly all oxygenic phototrophs as their primary photopigment in their photosynthesis pathways. There are also many organisms that tap into a variety of chlorophylls to extend the energetic limits of photosynthesis, which are largely found as accessory pigments. One genus of cyanobacteria, Acaryochloris, has garnered attention for the ability to undergo photosynthesis by harnessing the far-red part of the visible light spectrum using chlorophyll d …

Three Papers On The Investigation Of Epistemic Legitimacy Among Colombian Regulators, Carolina Velandia Hernández

Graduate Research Theses & Dissertations

This dissertation explores the intricate dynamics of how policy actors, as members of distinct epistemic communities, form, legitimize, and rationalize their preferences and behaviors. These epistemic communities provide a foundation for understanding the origins of beliefs and the mechanisms that drive cooperation, coordination, and advocacy among policy actors. By focusing on regulators within the energy policy subsystem in Colombia, this study sheds light on the significance of epistemic community membership in shaping beliefs about the human-nature relationship.

Additionally, this dissertation makes a methodological contribution by employing interpretative techniques for interviewing and data collection. It emphasizes the role of positionality, particularly …

Expressive Writing Rooted In Self-Determination Theory: An Intervention For Racial Trauma, Diana A. Robinson

Graduate Research Theses & Dissertations

Understanding the impact of racial discrimination is not a new endeavor in the field of psychology. However, research utilizing a trauma-focused lens to evaluate the negative mental health outcomes in the aftermath of racial discrimination is only in its infancy. In addition to depression, anxiety, and substance use, recent research has linked racial discrimination to negative mental health outcomes that mirror that of posttraumatic stress disorder (PTSD). Although many researchers have identified the negative effects of racial discrimination, few studies have examined intervention approaches designed to reduce the negative impact of racial discrimination. Self-Determination Theory (SDT) is a comprehensive theory …

A Climatology And Characteristics Of Midwest Heavy Snowfall, Benjamin William Warren

Graduate Research Theses & Dissertations

Understanding the characteristics of snowfall across the Midwest U.S. is critical for regional ecosystems, water cycles, and socioeconomic activities. The Midwest, however, has not been the primary focus of snow-related research in recent years. Therefore, this research uses observational and reanalysis data in the Midwest from 1991 through 2020 and radar data from 2009 through 2020 to create a comprehensive snowfall climatology, investigate regional trends in heavy snowfall, and determine the frequency of banded versus non-banded snowfall. As expected, heavy snowfall (i.e., daily snowfall accumulation >4") is most frequent in northern Midwest (e.g., Iowa, Minnesota, and Wisconsin), with the frequency …

Reinterpreting Fort Ancient Plant Relationships Through Native Science And Traditional Ecological Knowledge, Bailey Rae Raab

Graduate Research Theses & Dissertations

Paleoethnobotanical analyses over the past several decades have shed light on subsistence practices, agricultural strategies, and environmental interactions of members of the Fort Ancient culture, an Indigenous society that thrived in the Ohio Valley from 1000 to 1650 CE. Largely absent from these conversations, however, are discussions of non-food uses of plants or considerations of Traditional Ecological Knowledge (TEK). By combining multiple different sources of knowledge, a more holistic view of people-plant relationships within the Fort Ancient culture may be established, one that allows us to better understand these relationships in the past and present. In this thesis, I synthesize …

Experiences Of Discrimination, Covid-19 Stress, And Racial Trauma In College Students, Jennifer Valentine

Graduate Research Theses & Dissertations

Extant literature has illustrated the devastating effects of repeated exposure to discriminatory events on Black, Indigenous, and People of Color (BIPOC), leading to the development of a psychological injury, known as racial trauma. Research has suggested that racial trauma can sensitize individuals to future stressors, potentially placing marginalized populations at risk of developing adverse mental health outcomes due to the pervasive effects of systemic racism. While the literature on racial trauma is expanding, there remains a paucity of research examining racial trauma in the context of inequity in communities of color, such as during the COVID-19 pandemic. In addition, despite …

Development Of A Novel Prosocial Teasing Measure For Adolescents, Kristina Wiemer

Graduate Research Theses & Dissertations

Prosocial teasing is a fun, playful way for students to interact with each other that involves humorous off-record markers and playful provocation. While research has been done to observe prosocial teasing in school-aged youth, there are no validated measures of prosocial teasing that are designed to measure prosocial teasing frequency in adolescents. The current study extended the research on prosocial teasing through the validation of a novel, adolescent-specific measure of prosocial teasing behavior frequency. The current study also explored gender and grade-level differences in self-reported prosocial teasing frequency. Results indicated a one factor structure to the novel prosocial teasing measure …

Three Essays On The Impact Of Debt On Young American Adults’ Lives After Graduation, Sylvie Sanou

Graduate Research Theses & Dissertations

This dissertation investigates the impact of financial constraints due to debt on three aspects of young American adults' lives after graduation. The first essay examines the impact of student loan debt on the mental health of US young adults using restricted-access and publicly available data from the 1997 National Longitudinal Survey of Youth (NLSY97). Prior studies found that debt negatively affects mental health. However, few papers focused on educational debt. Unlike other debt, student loan debt is special because it funds human capital investment, and borrowers expect to receive a significant return on the investment. Using a two-stage estimation model, …

Latine Caregiver Perspectives Of Their Child’S Speech And Language Services, Marisol Perez

Graduate Research Theses & Dissertations

Early Intervention (EI) speech-language pathologists (SLPs) are mandated to provide culturally responsive services to culturally and linguistically diverse (CLD) clients. However, little is known about Latine caregivers’ perspectives on receiving these services. The purpose of this study was to examine Latine caregivers’ perspectives on their child’s speech and language services by answering the following research questions: 1) How do intrinsic factors relate to Latine caregiver satisfaction with their family’s speech and language services? 2) Does perception of clinician cultural sensitivity relate to Latine caregiver satisfaction with speech and language services? 3) What do Latine caregivers perceive as determinants (facilitators and …

Iodp U1537: Scotia Sea Climatic And Frontal Variation Reflected In Diatom Productivity And Assemblages Since The Lgm, Garrett Lewis Strittmatter

Graduate Research Theses & Dissertations

Located off the coast of the West Antarctic Ice Sheet, the Scotia Sea is a site of great significance in palaeoclimatological studies due to the nature of its sedimentary record. This site of interest is at the tip of the Antarctic Peninsula on the Eastern side, in the direct flow of the Antarctic Circumpolar Current thereby concentrating icebergs from around the continent. Additionally, these sediments are rich in diatoms. Finally, this site, within the analyzed section, has an average sedimentation rate of ~48 cm/Kyr.

By collecting sediment cores rich in diatoms, among material used to generate other paleoclimate proxies, we …

The Human Faces Of Dissident Socialism: The Fight For Human Rights In Soviet Ukraine, Alexander Nicholas Sosenko

Graduate Research Theses & Dissertations

This dissertation examines the transformation of a Ukrainian literary and aesthetic avant-garde movement in the 1960s, the Sixtiers, into an emblem of the 1970s global human rights campaign. This historical interpretation intertwines the brief flicker of early-1960s Ukrainian art and poetry with the joyous and tragic stories of Soviet citizens fighting for human rights. The Ukrainian Sixtiers’ experience with political persecution made them ideal players in the international human rights movement in its formative years. They adopted positive foreign influences and modified them for their own situation, whether in intellectual work or human rights activism. This represents a Soviet Ukrainian …

The Expansion Of Social Assistance Programs: The Politics Of Development In Bangladesh, Sumaya Tamanna

Graduate Research Theses & Dissertations

Why do authoritarian regimes in the global south expand social assistance programs when electoral competition is absent? What are the driving factors behind their willingness to adopt and expand pro-poor social assistance programs? To answer this question in the context of Bangladesh, I did a secondary qualitative analysis to unfold the puzzle of social assistance expansion in Bangladesh. I explored existing literature and tested those in the case of Bangladesh by analyzing existing literature on Bangladesh, as well as data and documents in order to solve the puzzle. I find that, even though electoral competition is absent, the current regime …

Univariate Extreme Value Analysis Of Quantitative Investment Management, George Agbenyega Zumanu

Graduate Research Theses & Dissertations

The evolution of product development within the variable annuity (VA) business have sparked interest in quantitative investment management, particularly as most VA issuers have integrated volatility-controlled funds into their annuity portfolios. Despite the existence of empirical research on statistical analysis of extreme values in conventional investments, there has been a notable gap in research focus towards risk modeling in volatility-controlled funds.

This study contributes by analyzing and modeling the extreme values of investments in volatility-controlled funds, comparing them to conventional equity funds. The financial returns of S&P Dow Jones Indices (SPDJI) indices - SPXTR, risk control SPXT18UT, and managed risk …

An Environmental Isolate Of Pseudomonas, 20ei1, Reduces Aspergillus Flavus Growth In An Iron-Dependent Manner Affecting The Expression Of Numerous Genes, Elizabeth Marion Wyman

Graduate Research Theses & Dissertations

Aspergillus flavus is an opportunistic pathogenic fungus that infects oilseed crops worldwide. When colonizing the plants, it produces mycotoxins, including carcinogenic compounds such as aflatoxins. Mycotoxin contamination results in an important economic and health impact. The design of new strategies to control A. flavus colonization and mycotoxin contamination is paramount. In this study, we identified a promising new isolate of Pseudomonas spp., 20EI1, and observed that it is able to reduce the growth of A. flavus AF70. Furthermore, we determined that this growth inhibition is iron-dependent. To further elucidate the nature of this bacterial-fungus interaction, we performed metabolomics and transcriptomics …

Trajectory Of Infant Emotion Regulation Strategies And Negative Affect And Associations With Toddler Externalizing Problems, Sabrina D. Ung

Graduate Research Theses & Dissertations

Previous research recognizes the critical role played by child emotion regulation (ER), the regulatory component of temperament, and negative emotionality (i.e., the tendency to experience negative emotions such as fear, sadness, anger, and frustration) in emotional and behavioral functioning throughout the lifespan. Poor ER and high negative affect in early childhood are linked to impulsive and aggressive behaviors, internalizing behaviors, and lower cognitive functioning. However, few studies have investigated how specific ER strategies and negative affect change across infancy by employing latent growth modeling. Additionally, existing work has neglected to examine the growth trajectory of escape behaviors across infancy as …

The Gentle Powers: The Importance Of Unmarried Women In The Middlebrow Novels Of Interwar Britain, Caitriona Terry

Graduate Research Theses & Dissertations

My dissertation explores the rise of the women’s middlebrow novel in interwar Britain and the use of unmarried women as heroines. During a time of extreme gender imbalance, female middlebrow authors often took up spinsters, who were treated as pitiable and superfluous by both the literary establishment and the press, and turned them into everywomen who could speak directly to the changing and uncertain times their readers were struggling with.

Although the middlebrow was more of a loose grouping of authors than an intentional artistic or intellectual movement, by surveying books under this umbrella that focused on unmarried women and …

Modeling And Performance Evaluation Of Traditional And Ai-Based Mppt Techniques For Photovoltaic Systems., Md Badruddaza

Graduate Research Theses & Dissertations

The efficiency levels to convert from sunlight to electricity are in the range up to 22% commercially, based on the technology used. Due to comparatively low efficiency of photovoltaic systems, it is imperative to extract maximum power from the PV module array. Thus, in solar PV system, tracking the module’s MPP (maximum power point) is crucial and at the same time challenging as well due to varying climatic conditions. This research focuses on the modeling and performance evaluation of traditional Maximum Power Point Tracking (MPPT) techniques and AI-Based MPPT algorithms in photovoltaic systems. It addresses the issue of dynamic adjustment …

Dna I-Motifs: Biophysical Characterization And Structure-Property Correlation As Foundation For Functional Material Design, Alexander Minasyan

Graduate Research Theses & Dissertations

Over the past decades, nucleic acids have emerged as crucial frameworks with significance in biological systems and functional material engineering. Cytosine-rich deoxyribonucleotide sequences can form quadruplex structures a.k.a. i-motifs. Recently, i-motifs have attracted scientific interest in biological and material design areas.

In this work, we systematically investigate an effect of structured and unstructured modifications such as hairpins, stems, loops and overhangs on the kinetic and thermodynamic properties of DNA i-motifs. We demonstrate that the modifications can influence i-motif’s stability and folding/unfolding rates: thus, double stranded stems and hairpins are the best at stabilizing i-motifs and increasing kinetic rates of folding. …

Explicit Proximal Gradient Methods: Bridging Theory And Practice In Optimization, Cassandra Mohr

Graduate Research Theses & Dissertations

Convex optimization problems are central to numerous fields, including machine learning, signal processing, and image reconstruction. The development and analysis of algorithms for solving splitting optimization problems constitutes a significant area of research. In particular, we investigate a proximal gradient splitting method (PGM) with an explicit linesearch for finding the solution of nonsmooth optimization problems, where the objective function is the sum of two convex functions.

We focus on cases where one of the functions is differentiable, without imposing any Lipschitz continuity assumption on its gradient. We establish the proper definition of the linesearch, and demonstrate that this version of …