Digital Commons Network^™

Outcomes Associated With Childhood Parental Divorce: An Umbrella Review Of Meta-Analyses, Gabriel Xing Da Tan, Andree Hartanto, Ysabel Thereze Ang Guevarra, Angel K. M. P. Lee, Jing Jie Kenneth Koh, K Tennakoon Appuhamillage Sandeeshwara Kasturiratna

Research Collection School of Social Sciences

Background: Childhood parental divorce has been consistently associated with a host of negative outcomes across multiple domains, such as socioemotional, behavioural, academic, and physical health, which can persist into adulthood. Despite extensive research on childhood parental divorce, the current literature lacks a systematic, integrated synthesis that clarifies which child outcomes are most consistently associated with parental divorce, as well as the potential moderators influencing these associations. Therefore, we conducted an umbrella review of meta-analyses to bridge this gap by consolidating the existing research and providing an exhaustive overview. Methods: Systematic searches were conducted across various databases and following a two-stage …

Low Methane Emissions From Nutrient-Rich Former River Channels In A Hydrologically Managed Dryland Delta, Siena Stassi, Jude A. Benavides, Chu-Lin Cheng, Marcelo Gomes Da Silva, Nicholas E. Ray, Nathan O. Barros, Rafael M. Almeida

School of Earth, Environmental, & Marine Sciences Faculty Publications

Anthropogenic stresses in dryland regions can alter hydrology, salinization, and biogeochemical processes. How these pressures influence methane (CH4) cycling and emissions from aquatic ecosystems remains poorly understood. Over the course of 1 year, we measured diffusive and ebullitive CH4 emissions from resacas—shallow, hydrologically managed distributary channels prevalent throughout the Lower Rio Grande Valley along the US–Mexico border. Despite warm, nutrient-rich waters, CH4 emissions from resacas were low, and more comparable to rates observed in estuarine systems. CH4 fluxes were positively related to temperature but negatively related to salinity and rainfall. Elevated salinity, driven by evaporation and source water from the …

Landscape Connectivity And Wildlife Access To Water Across An International Border: Barriers And Opportunities For Facilitating Transboundary Movement, Bogdan Chivoiu, Erin L. Koen, Michael J. Osland, Christopher A. Gabler, Jerald T. Garrett, Ernesto Reyes, Stephanie A. Bilodeau, Mitch A. Sternberg, Jude A. Benavides, James Martinez

School of Earth, Environmental, & Marine Sciences Faculty Publications

Rapid global acceleration in the construction of physical barriers along international borders has greatly influenced biodiversity and animal movement. Physical barriers can fragment landscapes, hinder access to essential resources, impact long-distance migrations, and inhibit dispersal and gene flow. The effects of physical barriers on animal movement and landscape connectivity can be exacerbated in dryland environments where access to water is a limiting factor. In recent decades, the construction of border barrier infrastructure has accelerated along the international boundary between the United States and Mexico. Here, we used a landscape connectivity model to investigate the effects of barriers on wildlife access …

Moderating Effects Of Defense Mechanisms On The Link Between Dark Triad Traits And Stress: A Replication With Addition Of Early Trauma, Ngayin Cheng

Student Theses

Literature suggested Dark Triad traits, comprised of narcissism, Machiavellianism, and psychopathy, are linked to adverse childhood environment and maladaptive coping that contribute to negative mental health outcomes, but Richardson and Boag's study (Richardson & Boag, 2016) was one of the few studies that first found Dark Triad traits are associated with immature defenses and higher perceived stress simultaneously. This replicated study aims to verify the original findings of their research by examining how defense mechanisms moderate the relationship between Dark Triad traits and perceived stress. A sample of 199 participants completed self-report measures assessing the Dark Triad traits, defense styles, …

College Student Coping And Experiences During The Covid-19 Pandemic, Trinka Peer Pape

Dissertations

The isolation experienced by college students during the COVID-19 pandemic led to numerous issues and increased stress. The purpose of this study was to examine the coping mechanisms that college students utilized during the COVID-19 pandemic and explore the impact of the pandemic on how these students coped and their overall lived experiences. Participants were juniors and seniors graduating between May 2023 and May 2024 from a university in the southern Midwest. The researcher employed a mixed methodology approach, consisting of a quantitative survey, followed by qualitative interviews with students who completed the survey. Based on the results of the …

Optical Counterparts To X-Ray Sources In Lsst Dp1, Yuankun David Wang, Eric Bellm, Robert I. Hynes, Yue Zhao, Poshak Gandhi, Liliana E. Rivera Sandoval, Sandro Campos, Neven Caplar, Melissa Delucchi, Konstantin Malanchev

Physics & Astronomy Faculty Publications

We present a crossmatch between a combined catalog of X-ray sources and the Vera C. Rubin Observatory Data Preview 1 (DP1) to identify optical counterparts. The six fields targeted as part of DP1 include the Extended Chandra Deep Field South (E-CDF-S), the Euclid Deep Field South, the Fornax Dwarf Spheroidal Galaxy (Fornax dSph), 47 Tucanae (47 Tuc), and science validation fields with low Galactic and ecliptic latitude (SV_95_-25 and SV_38_7, respectively). We find matches to 2314 of 3830 X-ray sources. We also compare our crossmatch to DP1 in the E-CDF-S field to previous efforts to identify optical counterparts. The probability …

Pattern Dynamics And Stochasticity Of Brain Rhythms And Spike Trains In A Tauopathy Mouse Model Of Alzheimer’S Disease, Clarissa M. Hoffman

Dissertations and Theses (Open Access)

Systems neuroscience posits that every aspect of perceived physical reality, every aspect of animal and human behavior, and every cognitive phenomenon emerges from patterns of neuronal activity. While most researchers embrace this idea, there are major difficulties in describing and analyzing these complex neuronal dynamics—spike flows produced by cells ensembles, synchronized extracellular field oscillations, and other patterns—which limits our understanding of how the activity of individual neurons and the whole-animal cognition and behavior might be connected. In particular, we lack the approaches and even the semantics for connecting the individual cell outputs and the integrated results of their activity. Current …

Technical Development, Optimization, And Clinical Implementation Of Quantitative Magnetic Resonance Imaging Methods For Radiation Oncology, Lucas Mccullum

Dissertations and Theses (Open Access)

Magnetic resonance imaging (MRI) has gradually grown more important in the field of radiation oncology. This paradigm shift has grown from initial experiments with MRI of cancerous lesions in the early 1970s, to the integration of MRI images for radiation therapy treatment planning (i.e., MRI-Simulation) in the early 1980s, to the combined MRI linear accelerator (MR-Linac) becoming commercially available in 2018 which can simultaneously image a tumor and treat it with radiation. However, due to its novelty in radiation oncology, its full potential for the integration of quantitative MRI-based biomarkers has yet to be fully realized.

Therefore, this dissertation will …

Membrane Organization Of Rheb And Rhoa: Roles In Function And Allosteric Druggability, Chase M. Hutchins

Dissertations and Theses (Open Access)

Small GTPases of the Ras superfamily are membrane-bound molecular switches that regulate nearly all major cellular processes, and their dysregulation drives cancers, neurological disorders, and metabolic diseases. While anchored to cellular membranes, the catalytic domains of small GTPases undergo orientation dynamics, adopting distinct configurations that can occlude or expose effector-binding surfaces and modulate signaling output. These dynamics have been characterized in the Ras oncoproteins, but whether they extend across the superfamily and influence allosteric druggability has remained unknown.

In this dissertation, I address these questions through Rheb and RhoA, two small GTPases with complementary differences in subfamily lineage, membrane localization, …

Platelet Gαz Regulates Ovarian Tumor Growth And Mediates The Effects Of Chronic Stress, María G. Torres Carrizalez

Dissertations and Theses (Open Access)

Ovarian cancer is the most aggressive gynecologic cancer, with 12,450 estimated deaths in 2026. Elevated platelet counts are commonly observed in patients with ovarian cancer and are associated with enhanced tumor growth and poor prognosis. Patients with ovarian cancer are frequently exposed to elevated levels of stress, which has been correlated with accelerated disease progression and increased mortality. Interestingly, the platelet Gαz protein is activated by epinephrine through the α2A-adrenergic receptor, suggesting a potential mechanistic link between stress signaling and platelet-driven tumor progression. To investigate this, I evaluated the role of platelet Gαz in ovarian cancer using control (Gz^{fl/fl …}

Understanding Epigenomic Landscapes In Cancer Progression And Immunotherapy Response, Jonathan Schulz

Dissertations and Theses (Open Access)

Nonmutational epigenomic reprogramming has emerged as a key hallmark of cancer that plays crucial roles in tumor evolution during its progression and response to therapy. However, the extent and nature of epigenomic reprogramming remains poorly understood. This dissertation examines how epigenetic regulation shapes cancer progression and response to immunotherapy. Working at the intersection of cancer biology and computational genomics, it develops analytical frameworks for characterizing chromatin structure and DNA methylation across diverse tumor contexts and uses these frameworks to address two complementary biological questions: how promoter-associated chromatin organization varies across cancer types, and how epigenetic perturbation modulates tumor immunogenicity in …

An Integrated Framework For Early Detection And Transmissibility Assessment Of Emerging Variants In Wastewater, Xingwen Chen, Tin Phan, Wei Lin Lee, Katie Clark, Steven F Rhode, Samantha Brozak, Bruce Pell, Tsultrim Palden, Mats Leifels, Anna Gitter, Yang Kuang, Stefan Wuertz, Janelle Thompson, Kristina D Mena, Eric J Alm, Fuqing Wu

Faculty, Staff and Student Publications

Tracking the emergence of new viral variants is critical for epidemic preparedness, but remains challenging because variants typically circulate at low prevalence during the early phase of outbreaks. Here, we present an integrated framework that combines sensitive variant detection in wastewater with quantitative assessment of transmissibility through dynamic epidemic modeling. Using the SARS-CoV-2 Omicron variant as a proof of concept, we developed a novel nested allele-specific RT-qPCR assay (NAS-PCR) that achieved a thousand-fold increase in sensitivity compared with allele-specific RT-qPCR (limit of detection: 0.5 copies/μl). NAS-PCR detected Omicron in wastewater samples from the Greater Boston area starting in September 2021, …

Introduction To The Special Issue On Computer Modeling For Future Communications And Networks, Wenbing Zhao, Pan Wang

Electrical and Computer Engineering Faculty Publications

No abstract provided.

Body And Blood: The Black Catholic Imagination In Toni Morrison's Novels, Allison Schneider

FCRH Honors Program Theses

Religion was a powerful shaping force in Toni Morrison’s life, so it should come as little surprise that it shaped her art, as well. From the personal to the academic, her religious experiences deeply inspired her writing, and the spiritual dimension of her work has become a prominent topic among Morrison scholars. Despite a vast body of research dedicated to the religious in her novels, the prevalence of Catholic themes in Morrison’s novels remains largely unexplored. Born and raised in Lorain, Ohio, Morrison grew up surrounded by different faith traditions. Her mother belonged to the African Methodist Episcopal (AME) Church, …

Enhancing Reliable Performance Of Microgrids With Autonomous Control Of Distributed Energy Resources, Sahand Liasi

All Dissertations

This dissertation presents a comprehensive investigation into enhancing the reliability, efficiency, and autonomous operation of modern power networks through advanced microgrid integration and control strategies. The research addresses critical challenges across three interconnected domains: microgrid control, thermodynamic modeling of heat recovery system (HRS), and optimal distribution network reliability.

In the realm of microgrid control, this work introduces novel methodologies for grid forming inverter-based resources (IBRs). A significant contribution is the development and validation of an "Auto Frequency Change" controller, which drastically reduces microgrid synchronization time with the main grid from several minutes to approximately four seconds, with theoretical potential for …

Development And Validation Of The Ampere Scale: Measuring Adaptive And Maladaptive Perfectionism In Engineering Students, Haleh B. Brotherton

All Dissertations

Perfectionism refers to the inclination to set very high expectations for oneself, which can at times encourage personal development and at other times lead to stress and a sense of pressure. Perfectionism is widely observed among engineering students; however, instruments that distinguish adaptive striving from concern-driven tendencies in the engineering context remain limited. My study is based on the development and validation of the AMPERE (Adaptive and Maladaptive Perfectionism in Engineering) scale through a three-phase process: (I) expert review with two domain experts to establish content validity; (II) cognitive interviews with seven undergraduates to refine wording and interpretability; and (III) …

Generative Ai Of Breast Cancer Progression In Gene Expression Space, Xusheng Ai

All Dissertations

Breast cancer is one of the most common and deadly cancers in the world. Although doctors can use gene activity data to better understand different types of breast cancer, it is still difficult to identify the most important genes and to track how the disease changes over time. This is partly because gene data are very large and complex.

This dissertation develops a computer-based framework to study breast cancer using gene expression data. The work focuses on three goals: creating realistic synthetic gene data, identifying important genes linked to cancer, and modeling how breast cancer changes from normal tissue to …

Safe Control Design For Quadruped Locomotion In Unstructured Environments Using Linear Transfer Operators, Sriram Sundar Krishnamoorthy Shankara Narayanan

All Dissertations

Deploying quadruped robots in unstructured, obstacle-rich environments requires control and planning methods that remain safe and reliable despite complex terrain geometry, limited sensing, and inevitable modeling errors. This thesis develops operator-theoretic tools for safe control design of robotic systems using linear transfer operators, with a focus on quadruped locomotion in unstructured environments. The central goal is to develop a unified operator-theoretic framework for safe control design based on the Perron–Frobenius (P–F) and Koopman operators. In particular, the thesis leverages \emph{density functions} to develop safe navigation frameworks in the dual space of densities. In the operator-theoretic perspective, the P–F operator governs …

“Do We Belong?”: Supporting Culturally And Linguistically Diverse Students Through Teacher Education, Morohunkeji Orija

All Dissertations

The population of students from diverse cultural and linguistic backgrounds in K-12 education continues to increase, yet the teacher workforce remains largely homogeneous, predominantly White. This imbalance creates a cultural mismatch in educational settings. In teacher education, predominantly White teacher educators prepare predominantly White preservice teachers, further increasing this mismatch. In early childhood education (ECE), which spans birth to 8 years, racial mismatch can lead to misunderstandings and misconceptions, contributing to bias and manifesting as Racial Microaggressions (RMAs). RMAs are mostly unintentional, and research is needed to examine how preservice teachers can identify and address them, given their impact on …

Interplay Between Phase Instability And Deformation Mechanisms In Beta Titanium Alloys In Aggressive Environments, Benjamin Elbrecht

All Dissertations

Modern designs, such as commercial jet turbines, are reliant on the high temperature performance of their constituent materials. Improvements to the strength-at-temperature of materials are critical to the continued advancement of efficiency and payload capacity in these advanced applications. This dissertation presents studies that progress towards this goal through the construction of a new experimental setup for complex temperature and force profiles that also accurately captures deformation behavior through non-contact measurements. Using this setup, studies into two specialty titanium alloys were executed: discovering the microscopic mechanisms responsible for the macroscale behavior and testing in conditions closely replicating aircraft turbine operating …

Monomial Quadratic Identities Of Hecke Eigenforms, Trevor Vilardi

All Dissertations

Duke and Ghate independently studied the question of when it is possible for the product of two eigenforms to be an eigenform. In this dissertation, we take up a generalization of that question, namely is it possible for the product of two eigenforms to be equal to a different product of two eigenforms? Under this formulation, the question becomes closer to one about unique factorization, i.e., how closely do eigenforms work like irreducible elements? Our conjecture is that there are only finitely many cases where the product of two eigenforms is equal to a different product of two eigenforms, and …

Using Large Language Models To Assess Entrepreneurial Personality In Generation Z College Students, Xianyong Wang

All Dissertations

As entrepreneurial personality (EP) plays a critical role in Generation Z’s (Gen Z) long-term success, it is crucial to understand the EP of Gen Z college students. To date, little is known about what EP is and how it can be assessed in Gen Z. Therefore, this dissertation presented two sequential studies to address two closely related research foci. The first study examined the scope and dimensionality of EP in Gen Z college students using topic modeling. In the second study, pre-trained LLMs were fine-tuned to predict self-reported EP levels from personal narrative responses. To collect data, college students (N …

Reimagining Access: Gentrification, Race And Youth Engagement In Outdoor Recreation, Cameron Smith

All Dissertations

Outdoor recreation has proven beneficial for youth, providing mental, social, and physical health benefits that last a lifetime. However, there is a gap in Black and Brown youth's participation in structured outdoor activities due to a multitude of structural factors. An overarching systemic factor that has affected these youths' participation in outdoor recreation is Gentrification, and its derivative, Green Gentrification, which specifically refers to how green amenities and infrastructure drive displacement of long-term communities. As a result of the displacement, Black and Brown youth are placed in a society where they are forced to navigate spaces that were intentionally designed …

The Impact Of Label Material On Perceived Value And Environmental-Friendliness Of Beverages In Returnable Glass Bottles Versus Actual Environmental Impact Via Life Cycle Assessment, Toni Sharp

All Dissertations

With guidance from the EPA to reduce virgin packaging use and alternatively increase reuse, the concept of reusable packaging has re-emerged as a potential sustainable alternative to single-use and recyclable packaging. For businesses, an understanding of the potential environmental benefits of switching from single-use packaging to reusable packaging, along with consumer willingness to pay for sustainable packaging are paramount. Existing literature on willingness to pay (WTP) for ethical or sustainable products typically relies on consumers’ stated preferences found through surveys using hypothetical products and prices. It has been revealed that sustainability claims printed on the label or products in glass …

Assessing Neurodiverse Inclusion In Zoos, Aquariums, And Nature Centers: A Secondary Analysis Of The Mozaics Project, Jennifer N.K. Garcia

All Dissertations

Playful experiences are found to promote positive youth development (Burdette & Whitaker, 2005; Gray, 2011; Sobel, 2018; Watchman & Spencer-Cavaliere, 2017). Additionally, playing in nature can improve attention and mood and reduce stress (Greenleaf, 2014; Kaplan & Kaplan, 1989; Shin & Swank, 2018; Ulrich ,1991). Unfortunately, neurodiverse youth, especially those with autism, can often experience barriers that limit access to play (Pynn et al., 2018; Stern, 2003) specifically play in nature (Barnes, 2007; Wolfberg, 2009). Yet, community organizations that offer playful experiences in nature, such as zoos, aquariums, and nature centers, could be uniquely positioned in the community to support …

Virtual Reality In Informal Education: Trends, Frameworks, And Implementation Strategies, Allison Maynard

All Dissertations

The rapid evolution of immersive technologies presents informal education settings with a complex dual challenge: while virtual reality (VR) offers compelling opportunities for engagement and experiential learning, its adoption demands significant institutional resources and may require a meaningful departure from established interpretive practice. As informal education institutions face decisions about whether to adopt emerging technologies, a critical gap remains in understanding how VR should be designed and integrated to serve both organizational missions and the needs of frontline interpreters and audiences. This dissertation moves beyond the technical novelty of VR to empirically examine its purposeful positioning within informal education settings, …

Baseline Cervical Intervertebral Disc Biomechanics And Implications For Allograft Preservation, Nathan F. Buchweitz

All Dissertations

Neck pain has become an increasingly common orthopaedic healthcare issue. Evidence shows that degeneration of cervical intervertebral discs (the cartilage between the spinal vertebrae in the neck) may be associated. While disc degeneration in the lumbar spine has been extensively studied in relation to low back pain, it has received less attention in the cervical spine. Biomechanically, the cervical (neck) and lumbar (lower back) regions of the spine differ in function. Lumbar discs resist a greater burden of body weight, whereas cervical discs are adapted for mobility to aid flexible head orientation. Despite these key differences, disc injury and degeneration …

Neurobiological Mechanisms Of Attention In Adolescents, Virginia Clark

All Dissertations

Adolescence is a transformative developmental period characterized by profound biological, neurological, and behavioral changes. This dissertation investigates the neurobiological underpinnings of attention in adolescents, emphasizing how internal mechanisms influence and individually shape cognitive development through the endosystem. Rooted in the intersection of human development, learning sciences, and cognitive neuroscience, this work argues for a more integrated understanding of attention as a fundamental cognitive function for learning, one that is behaviorally seen but also biologically and neurologically driven. While developmental science has often emphasized external influences such as family, culture, and environment, this work centers on the adolescent’s internal biological systems …

Sweetly Somatic, Grace Edwards

Graduate Theses and Dissertations

The delight of biting into something sweet. The freedom of getting lost in the movement of your own body. The sensation of being completely enveloped by color. The flutter that rises in your chest when surrounded by abundance. Sweetly Somatic traces personal sensory experience across time, transforming ephemeral moments of joy into forms that capture enduring perseverance. Sculpted from fluxing ceramic materials, piped grout, and glass adornments, the works examine the elasticity of memory, both bodily and retrospectively. My bodily sensations are my most accessible form of joy, and a filter that all experiences move through.

"Because You Speak Two Languages": Latino Immigrant Families Negotiating Language Ideology, Liminality, And Education In Arkansas, Cindy Rauth

Graduate Theses and Dissertations

This dissertation presents a critical ethnographic study of lower socio-economic status, multilingual Latino immigrant families in one region of Arkansas, which has undergone rapid demographic changes in the last four decades. As the Latino population has grown, schools have struggled to accommodate the needs of their diverse students and families, which has contributed to below-grade-level literacy skills and significant student disengagement. This study examines students’ schooling experiences from the perspective of the family. Through an interdisciplinary approach, this study explores three interconnected themes: family experiences of schooling, language ideology, and liminality. A comprehensive examination of family educational experiences includes the …