Digital Commons Network^™

Dynamics Of Spin And Charge Of Color Centers In Diamond Under Cryogenic Conditions, Richard G. Monge

Dissertations, Theses, and Capstone Projects

Individual quantum systems in semiconductors are currently the most sought-after platform for applications in quantum science. Most notably, the nitrogen-vacancy (NV) center in diamond features a defect deep within the electronic bandgap, making it amenable for precise manipulation to help pave the way to perform fundamental quantum physics experimentation. The NV center also offers long coherence times and versatile spin-dependent fluorescent properties, making it an ideal candidate for a nanoscale magnetometer. Furthermore, multi-color excitation offers deterministic charge state manipulation. While ambient operation has been key to their appeal, bringing NVs to cryogenic conditions opens new opportunities for alternate forms of …

Essays In Health Economics, Chuxin Liu

Dissertations, Theses, and Capstone Projects

In Chapter 1, I investigate the effect of a financial incentive from the Centers for Medicare and Medicaid Services (CMS) on new medical procedure technology diffusion. I examine how the incentive affects diffusion among Medicare patients, for whom hospitals receive the incentives, and non-Medicare patients for whom there are no incentives. I answer these two questions by studying the New Technology Add-on Payment (NTAP) program offered by Medicare (Part A). It is unknown whether its incentive is enough to encourage diffusion under the prospective payment system and it also remains unknown whether it spills over to non-Medicare patients or crowds …

Parallel Processes Of Posttraumatic Stress And Metabolic Dysfunction: Long-Term Costs Of Trauma On The Psychological And Physical Health Of 9/11 Survivors, Shane W. Adams

Dissertations, Theses, and Capstone Projects

Metabolic conditions (MetC) have been associated with posttraumatic stress disorder (PTSD) symptoms and may be critical indicators of the systemic physical sequelae of traumatic stress. Parallel process latent growth modeling wasapplied to longitudinal data collected from 35,788 9/11 survivors and used to model PTSD symptoms and MetC to determine how the development and course of one affect the other. A unidirectional relationship was found in which the intercept of PTSD symptoms predicted the slope of MetC. Hyperarousal (ß=.172) and emotional numbing (ß=.171) PTSD symptoms demonstrated the strongest association with the growth of MetC over and above …

Rewiring The Spokes: The Future Of U.S. Bilateralism In Asia, Gian Marc Lombardo

Dissertations, Theses, and Capstone Projects

Since the end of WWII, multilateralism has consistently grown as the go-to alliance structure for the United States. Despite this, the U.S. opted to create a series of bilateral alliances after WWII in Asia, dubbed the Hub-and-Spokes system. This alliance system has not only sustained itself, but also continues to fortify itself in the face of a rising threat in Asia. China has increased its assertiveness and has shifted the balance of threat in the region, while also being the primary economic and development option for regional states. This major change in the structure of Asian power has surfaced the …

Abuse Victimization And Impulsivity In Incarcerated Males: Examining The Roles Of Affective Instability And Trauma Symptoms, Jacqueline K. Douglas

Dissertations, Theses, and Capstone Projects

Incarcerated individuals with a history of physical and/or sexual abuse have been found to exhibit increased levels of impulsivity compared to those with no abuse history (Carli et al., 2014; Davis et al., 2017; Sergentanis et al., 2014). Given that impulsivity is a risk factor for criminal delinquency (Carroll et al., 2006; Kamaluddin et al., 2015; Zimmerman, 2010), it is important to gain a thorough understanding of psychological factors that may contribute to higher levels of impulsivity in incarcerated populations. The present study examined the mechanisms underlying the relationship of physical and/or sexual abuse history to impulsivity in a sample …

Health Care Providers' Attributions Of Blame For Unintended Pregnancy And Hiv Acquisition Among Cisgender Women, Alison J. Goldberg

Dissertations, Theses, and Capstone Projects

Unintended pregnancy and HIV are both possible but preventable outcomes of vaginal sex, and both can be prevented in similar ways (condoms, daily oral medication, etc.). Despite these similarities, providers more readily prescribe contraception to cisgender women, compared to PrEP (Guttmacher Institute, 2021; Raifman et al., 2019). Providers’ differential willingness to prescribe each medication cannot be attributed merely to differences in women’s need for pregnancy prevention vs. HIV prevention, as women account for nearly 20% of new HIV infections (CDC, 2021). Through three studies, I examined whether perceivers’ support for harm reduction (i.e., prescribing PrEP/contraception) and behavior reduction (i.e., discouraging …

Uncertainties In Retrieval Of Remote Sensing Reflectance From Ocean Color Satellite Observations, Eder I. Herrera Estrella

Dissertations, Theses, and Capstone Projects

Ocean Color radiometry uses remote sensing to interpret ocean dynamics by retrieving remote sensing reflectance (𝑅𝑟𝑠) from satellite imagery at different scales and over different time periods. 𝑅𝑟𝑠 spectrum characterizes the ocean color that we observe, and from which we can discern concentrations of chlorophyll, organic and inorganic particles, and carbon fluxes in the ocean and atmosphere. 𝑅𝑟𝑠 is derived from the total radiance at the top of the atmosphere (TOA). However, it only represents up to ten percent of the total signal. Hence, the retrieval of 𝑅𝑟𝑠 from the total radiance at TOA involves the application of atmospheric correction …

Disordered Protein Aggregates Are Linked To Changes In The Histone Post-Translational Modification Landscape In Disease And Non-Disease Models, Samantha Cobos

Dissertations, Theses, and Capstone Projects

Proper protein folding is a delicate balance that is crucial for normal biological function. In mammals, protein misfolding and aggregation leads to loss of function of the original protein while in many cases being associated with neurodegenerative diseases, eventually leading to death of the organism. In yeast however, the aggregated prion state is associated with positive cellular outcomes, and cells can switch between the [PRION+] and [prion-] states. Understanding the factors that lead to changes in prion state conformation in yeast could lead to novel insight into the conditions controlling misfolding by neurodegenerative proteinopathies. We believe that by studying the …

Population Genomics, Ecology And Conservation Of Asterias Sea Stars In The North Atlantic, Melenia I. Giakoumis

Dissertations, Theses, and Capstone Projects

Uncovering how species respond to environmental change is a central question in biology (Ehrlén & Morris 2015; Habibullah et al. 2022). It is the key to elucidating the past, understanding the present and predicting the future of species’ population dynamics. This dissertation investigates the influence of environmental change on intertidal species’ distributions and genomics at several timescales, with implications for conservation.

Environmental changes have occurred throughout history, on a geological scale, and have shaped the global patterns of species’ distributions and population sizes. Biologists have long studied how geological history has shaped species distributions (Sanmartín 2012) in both terrestrial (Liu …

Illness Intrusiveness And Psychosocial Adjustment Among Older Adults With Multimorbidity, Irina Mindlis

Dissertations, Theses, and Capstone Projects

Given the high prevalence of multimorbidity (MM) among older adults and the exponential growth of the older adult U.S. population, identifying factors that can lessen depressive symptoms and improve quality of life (QOL) in this population is timely and important. While it is well established that MM is associated with greater depressive symptoms and poorer QOL (Li et al., 2016; Makovski et al., 2019; Marengoni et al., 2011; Read et al., 2017), the mechanisms underlying these relationships remain understudied. The illness intrusiveness model (Devins et al., 1984) proposes that stressors posed by diseases (disease-related factors) and their treatments (treatment-related factors) …

The Role Of Intersectional Stigma And Social Anxiety In Black, Latino, And Multiracial Young Sexual Minority Men, Jorge L. Cienfuegos Szalay

Dissertations, Theses, and Capstone Projects

Black, Latino, and Multiracial YSMM are at disproportionate risk of acquiring HIV despite engaging in similar or less HIV risk behaviors when compared to their White YSMM counterparts. While over two decades of research have highlighted minority stress theory as a potential explanation as to why this disparity exists, increased efforts are being made to infuse this body of work with an intersectional framework. Intersectionality posits that individuals with multiple, interlocking social identities that are continuously affected and impacted by various forms of marginalization and stigmatization are at an increased risk of negative psychological and physical health outcomes. Current data …

Characterization Of Pathological Tau Mutants, Charles J. Mcdonald

Dissertations, Theses, and Capstone Projects

Tau is a protein expressed exclusively in glia and neurons in the central nervous system and implicated in several neurogenerative diseases called “tauopathies”. Among all the tauopathies, one third is characterized by the presence of genetic mutations leading to the synthesis of tau proteins with single amino acid substitutions at specific locations and affecting protein function. While most of the initial studies have emphasize the functional role of tau as modulator of the axonal cytoskeleton, it has recently been well accepted that tau is also an intrinsically disordered protein that tends to form membraneless organelles called coacervates, due to a …

Ways Of Silence And Other Absences In The Music Of George Crumb, Jean-Patrick Besingrand

Dissertations, Theses, and Capstone Projects

The music of American composer George Crumb (1929-2022) is undeniably singular in the musical landscape. His aesthetic is often characterized by his exploration of timbre, his graphic scores, his use of quotation, his theatricality, and his interest in unusual instruments. This study proposes to take a different approach to Crumb’s aesthetic through the spectrum of silences and other absences. The concept of silence will be broken down and reconstructed through the Japanese concept of ma (間) and of empty spaces. Multiple types of silences and absences will be considered throughout this dissertation, expanding thus the concept of silence not only …

Evaluating The Effect Of Cctv On Crime Occurrence And Case Clearances In Fayetteville, North Carolina: A Microsynthetic Control Quasi-Experiment, Amanda L. Thomas

Dissertations, Theses, and Capstone Projects

Closed circuit television (CCTV) surveillance cameras have become widely accepted as a traditional crime prevention measure used by law enforcement agencies across the globe. The proliferation of CCTV technology as a crime reduction mechanism has led to a corresponding growth in the evidence base of its effect on crime. While CCTV is generally associated with a moderate reduction in crime, these evaluations have suffered from certain limitations. First, rigorous quasi-experimental designs using advanced matching techniques have not been used enough in CCTV research and second, these evaluations remain largely one-dimensional, as additional outcome measures and other camera-specific features have gone …

Justice, Pandemics, And Museums In Cyberspace: Archaeology Museums’ Decolonization Projects During The Covid-19 Pandemic, Samuel Besse

Dissertations, Theses, and Capstone Projects

This paper explores three Archeology Museums (Historic St. Mary’s City, James Madison’s Montpelier, and the American Museum of Natural History), their attempts at addressing the colonial narratives that museums are built on, and how the Covid-19 pandemic and protests over George Floyd’s death affected these projects. I place a special effort on the online presence of these museums, as this is the main way visitors interacted with the museums during the pandemic. After discussing the origins of museum’s decolonization efforts and their efforts to make an online presence, I talk about the Covid-19 pandemic and the events around George Floyd’s …

Epistemic Virtue And Receptivity To Science In Policing, Braden L. Campbell

Dissertations, Theses, and Capstone Projects

This dissertation investigates the underexplored relationship between character epistemology and its potential to explain behavior, decision-making, and culture within the criminal justice system, particularly the police. Building on the existing theoretical framework of evidence-based policing (EBP) and the recognized gap in understanding police receptivity to science, this study hypothesized that intellectual character at personal and collective levels positively correlates with science receptivity.

Epistemic character was defined through the aggregation of four traits: open-mindedness, defensiveness, insouciance, and groupthink. Science receptivity was measured by openness to change, desire to learn, reliance on intuition, and mistrust of science. Data were collected through surveys …

Posthuman Lessons For Writing And Well-Being: Reparative Practices, Anna A. Larsson

Dissertations, Theses, and Capstone Projects

The influence of post-humanist interdisciplinary theories on Writing Studies has displaced its conventional preoccupation with the cultivation and management of subjects via First-Year Writing (FYC), to productive but at times artificially divisive ends. This project aims at an inclusive, anti-racist first-year writing ecology through theories of networked consciousness and digital “making.” I reread and recuperate earlier variants of posthumanist writing theory and draw from feminist materialism and mindfulness studies to establish a vision of well-being that I call networked reparative practices. To bring the abstract into the tangible, an often-valued endeavor in a field historically defined by teaching, I introduce …

Regulating The Care Boom: Labor Standards Enforcement And Paid In-Home Care Work, Isaac Jabola-Carolus

Dissertations, Theses, and Capstone Projects

In the United States, population aging has driven explosive growth in care-sector occupations, especially among low-wage home care aides who provide long-term assistance to older adults. These aides, predominantly women and disproportionately people of color, now represent one of the country’s largest and fastest-growing occupational groups. In recent decades, economic inequality and meager social policies have also spurred demand for nannies, housecleaners, and other domestic workers—occupations heavily reliant on immigrant women, many undocumented. While scholarly and public discourse has addressed labor shortages and job quality in such occupations, a related problem is the widespread violation of labor standards, including minimum …

You Hurt My Feelings: Autonomic And Behavioral Responses To Social Exclusion And The Moderating Effect Of Psychopathic Traits, Liat Kofler

Dissertations, Theses, and Capstone Projects

Humans have a fundamental need to form and maintain social connections, and thus experiencing social exclusion is extremely distressing as it threatens this basic human need. Individuals who are socially excluded often respond aggressively, not only towards their ostracizers but also towards innocent bystanders, with ostracism being implicated in extreme acts of violence such as school shootings. However, individual differences in behavior exist within the context of social exclusion as not everyone responds aggressively after being ostracized. Identifying risk factors for retaliatory aggressive behavior following experiences of social exclusion may facilitate the development of targeted interventions aimed at mitigating such …

Centrality Effects On Heavy-Flavor Quark Production And Invariant Yield In Phenix Proton–Gold Collisions At Center-Of-Mass Energy 200 Gev, And Assembly, Testing, Calibration, And Installation Of The Sphenix Hadronic Calorimeters, Daniel Richford

Dissertations, Theses, and Capstone Projects

Hadrons created in heavy-ion collisions interact with the open color-charge of the quark-gluon plasma through their constituent quarks. The medium imparts substantial modifications to heavy-flavor hadrons' momentum spectra. For collisions of small systems, the centrality of those collisions affects both the production of heavy-quarks and the medium modifications that the heavy-quarks experience. This analysis uses the PHENIX detector at the Relativistic Heavy Ion Collider, which collected data from proton--gold collisions in 2015, with a trigger to preference the collection of the five-percent most-central collisions. This analysis uses the distance-of-closest-approach of electron tracks to study semileptonic decays from charm and bottom …

How Smoking Became A Moral Issue: A Complex Systems Perspective On Moralization, Matthew Vanaman

Dissertations, Theses, and Capstone Projects

When something is morally wrong, it is in the moral domain; when something becomes morally wrong, it is moralized. But how do we know when something is in the moral domain, and how can we tell whether something is becoming moralized? The empirical study of morality, or a given person’s judgment of what constitutes moral virtue or vice, has historically approached these questions through one of three theoretical perspectives: cognitivism, which argues that people primarily or mostly use effortful thought to judge right from wrong; emotivism, which sees these judgments as flowing from emotion; and dual-process models, which …

On The Order-Type Complexity Of Words, And Greedy Sidon Sets For Linear Forms, Yin Choi Cheng

Dissertations, Theses, and Capstone Projects

This work consists of two parts. In the first part, we study the order-type complexity of right-infinite words over a finite alphabet, which is defined to be the order types of the set of shifts of said words in lexicographical order. The set of shifts of any aperiodic morphic words whose first letter in the purely-morphic pre-image occurs at least twice in the pre-image has the same order type as Q ∩ (0, 1), Q ∩ (0, 1], or Q ∩ [0, 1). This includes all aperiodic purely-morphic binary words. The order types of uniform-morphic ternary words were also studied, …

Effects Of Genes And Gene-Environment Interactions On Work-Family Conflict And Enrichment, Peter Yu

Dissertations, Theses, and Capstone Projects

The COVID-19 pandemic has shown how macro-level issues can influence how we manage work and family responsibilities. Yet, work-family (WF) research at different levels of analysis is relatively scarce. To address this, I take a multilevel lens to study WF conflict and enrichment in the context of micro-level factors (in the form of genes), macro-level factors (in the form of family and community-level demands), and their cross-level interactions (i.e., gene–environment interactions). To study genetic main effects, I drew from the work-home resources model to identify four candidate genes associated with conditions that could impact the ability to accrue WF resources …

Ejercicios De Sí: Escritura, Cuerpo Y Deporte En El Cono Sur (1964–2019), Pablo Yankelevich

Dissertations, Theses, and Capstone Projects

My dissertation studies the work of three performative figures from Latin America for whom physical practice is a fundamental issue of their artistic inquiries. In particular, it analyzes the ways in which writers and athletes Leonor Silvestri (Argentina), Héctor Benjamín Viel Temperley (Argentina), and Paulo Leminski (Brazil) problematize the body as the site of social and political experimentation over the last fifty years. By examining how these figures challenged liberal and neoliberal normative dictums about the place of the body, particularly in times of political repression, my research reflects on unauthorized exercises of bodily freedom and considers sport and physical …

Optimization And Application Of Graph Neural Networks, Shuo Zhang

Dissertations, Theses, and Capstone Projects

Graph Neural Networks (GNNs) are widely recognized for their potential in learning from graph-structured data and solving complex problems. However, optimal performance and applicability of GNNs have been an open-ended challenge. This dissertation presents a series of substantial advances addressing this problem. First, we investigate attention-based GNNs, revealing a critical shortcoming: their ignorance of cardinality information that impacts their discriminative power. To rectify this, we propose Cardinality Preserved Attention (CPA) models that can be applied to any attention-based GNNs, which exhibit a marked improvement in performance. Next, we introduce the Directional Node Pair (DNP) descriptor and the Robust Molecular Graph …

Understanding The Impact Of Incentive-Driven Changes In Hospital And Physician Practice Styles, Ke Zeng

Dissertations, Theses, and Capstone Projects

This dissertation consists of three chapters that investigate impact of incentive changes on hospital and physician practice styles, as well as patient outcomes.

In an effort to curb the escalating healthcare expenditure, the Center for Medicare \& Medicaid Innovation has introduced several alternative payment models, which have garnered significant attention in numerous studies with varied findings. This first chapter introduces the focal point of this thesis, namely the Comprehensive Care for Joint Replacement (CJR) model, and provides a review of pertinent studies that have examined this model and related areas. Specifically, this chapter reviews and summarizes the findings from studies …

On The Spectrum Of Quaquaversal Operators, Josiah Sugarman

Dissertations, Theses, and Capstone Projects

In 1998 Charles Radin and John Conway introduced the Quaquaversal Tiling. A three dimensional hierarchical tiling with the property that the orientations of its tiles approach a uniform distribution faster than what is possible for hierarchical tilings in two dimensions. The distribution of orientations is controlled by the spectrum of a certain Hecke operator, which we refer to as the Quaquaversal Operator. For example, by showing that the largest eigenvalue has multiplicity equal to one, Charles Radin and John Conway showed that the orientations of this tiling approach a uniform distribution. In 2008, Bourgain and Gamburd showed that this operator …

A Study Of Geo-Regional Place-Consciousness In American Literature, Eugene Slepov

Dissertations, Theses, and Capstone Projects

The ancient Greek notions of topos, or place, and choros, or region, emerge from a an oral, narrative-based tradition that predates geography. These concepts remind us that that best source of material to study place is to be found in literary fiction. American fiction in particular will give us the evidence by which we can compile a qualitative, experiential understanding of the role of place in people’s lives. This dissertation inquires into the formation of the imaginative constructions that characters put upon place—such as through the process of consolidating and dwelling in places—and the way place puts …

Characterization Of The Conformational Binding Of N-Methyl Mesoporphyrin Ix With Dna Model Telomeric G-Quadruplex Forming Sequences, Jessica Desamero

Dissertations, Theses, and Capstone Projects

DNA G-quadruplexes are alternative secondary structures formed from guanine rich DNA sequences. G-quadruplexes are found most abundantly at the ends of chromosomes called telomeres, where they can ultimately prevent further tumor growth and progression. Thus, quadruplex interactive agents, or ligands that can bind to and stabilize DNA G-quadruplex structures, are of high interest for their potential chemotherapeutic abilities. One quadruplex interactive agent is the porphyrin N-methyl mesoporphyrin IX (NMM), which has high binding selectivity for quadruplex structures. While the NMM-quadruplex complex in crystallized form has been greatly studied, this complex in solution form is not as well studied. Through circular …

Observers' Perceptions Of Rapport In Accusatorial Interrogations, Gabriela Rico

Dissertations, Theses, and Capstone Projects

Rapport is widely regarded as a necessary precondition for interrogations and is thought to lay the foundation for the success of later interrogation techniques. In accusatorial contexts in which suspects are often resistant to disclose potentially self-incriminating information, rapport enables interrogators to gain the suspect’s trust, respect, and cooperation. Although the specific psychological mechanisms by which rapport achieves these effects are largely understudied, rapport-building techniques resemble principles of social influence (Goodman-Delahunty & Howes, 2014), specifically persuasion. Techniques such as establishing common ground, engaging in active listening, demonstrating empathy, and disclosing personal information may serve as impression management strategies, which allow …