Digital Commons Network^™

The Clumsy Leviathan: The Subtreasury And American Federal Power In The Nineteenth Century, Aaron Lee Chin

Doctoral Dissertations

This dissertation traces the history of the Subtreasury System, which preceded the Federal Reserve as the United States’ fiscal management system. Rather than relying on private banks, the government opted to store its money in federally owned and managed vaults called “subtreasuries.” By tracing the history of this overlooked institution, this project shows how the government used the Subtreasury to consolidate and display its economic power throughout the nineteenth century. My dissertation is the first to center monetary storage and control over financial spaces in the story of American state building during this crucial period. When the government chose to …

Gelatin-Based Microporous Injectable Hydrogels For In Situ Stem Cell Encapsulation, Seth David Edwards

Doctoral Dissertations

In this dissertation, I developed and investigated gelatin-based microporous injectable hydrogels for the encapsulation of stem cells for multiple applications in cell delivery. Utilizing microgels composed from a mixture of gelatin and modified gelatin, I demonstrated the utility of a dual crosslinking mechanism, which enabled rapid gelation and tissue adhesion with improved cytocompatibility. Mesenchymal stem cells (MSCs) encapsulated in this hydrogel proliferated at a more rapid rate than in a nonporous counterpart, and showed increased immunomodulatory potential. Then, I investigated gelatin microporous hydrogel for the encapsulation of MSCs for bone tissue regeneration. Encapsulated cells more readily differentiated into osteoblasts (i.e. …

The Warriors' Views: Mid-Level Officers On American Interventions, Foreign Policy, And The Road To 9/11, 1993-2001, Michael Anthony Anderson

Doctoral Dissertations

When President William Jefferson Clinton took office, the United States had entered into a new era, though it was heavily influenced by almost a half-century of Cold War. Foreign policy staples had been embedded into United States foreign policy habits, influencing American decisions even as it tried to transition to a new global environment. The Cold War had left America, but America had a hard time leaving the Cold War. The nation had difficulty transitioning away from applying containment, relying on mutually assured destruction in preventing weapons of mass destruction attacks, and focusing on major conventional warfare when small-scale contingencies …

"A Wild Home For Wild Things": Forest Workers' Co-Creation Of Knowledge, Identity, And Place, Adrienne R. Brown

Doctoral Dissertations

This study addresses the relationship between environmental knowledge and place-based and occupational identities. I conducted fifty-five in-depth interviews with people involved in forest management in northern California. Participants belonged to one of three groups: logger- industrial, governmental-institutional, or organizational. In addition, I completed twenty-seven hours of observational fieldwork at logging sites in the region. From these transcripts, several themes emerge. Participants adopt a variety of ways of knowing and conceptions of care, and these correspond to different forest priorities, as well as attitudes toward global environmental issues. These groups also each construct distinct occupational identities, which sometimes form in response …

Highly Dispersed Metal Sites On Semiconductor Surface For Small Molecule Activation, Ehab Shaaban

Doctoral Dissertations

Heterogeneous catalysts have been extensively used in various chemical transformations that have important ecological and economical relevance. The rational design of such catalysts, however, is still not effectively implemented due to the ambiguity that encircles their structure-activity correlations. The origin of synergetic effects which make the binary system (metal/metal oxide) distinct from the individual components continues to elude researchers. In this work, binding and structural properties that emerge from metal/metal oxide interaction were investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and X-ray absorption spectroscopy (XAS). Different catalytic structures, including highly dispersed Cu sites on TiO2, were …

Domestic Shakespeares In The Antebellum United States, Daniel G. Lauby

Doctoral Dissertations

This dissertation examines how early nineteenth-century female novelists developed a new mode of adapting Shakespeare, what I am calling “domestic Shakespeares,” that cite, reference, and rearrange plays based on women’s experiences in and of the home. I focus on popular women authors whose novels appeared between 1827 and 1862, a time when identity was especially apparent in the geographical formation of the United States. These women novelists used allusions to and adaptations of Shakespeare in their works to express their frustrations with conventional paradigms of womanhood and related disciplinary systems, such as coverture, that limited women’s citizenship. “Domestic Shakespeares,” I …

Designing For The Dissonance: Community-Engaged Field Experiences For Challenging Curricular Misconceptions Of Place Toward Localizing And Indigenizing Curricula Within Elementary Teacher Education., Elaine Marhefka

Doctoral Dissertations

Harmful oversights remain in elementary social studies curricula which overlook or misrepresent minoritized communities. This dissertation explores designs for teacher education which address these oversights through community collaborations. This multi-manuscript dissertation is an empirical-conceptual inquiry design (Cochran-Smith & Lytle, 2009), as it is not purely empirical or conceptual research. This design allows for an independent discussion of each study, while interpreting phenomena across the three chapters. Acknowledging my positionality as a white female, in a predominantly white, female profession, I look to Indigenous and Black scholars, both locally and broadly, to inform my perspective and project design. Using a phenomenological …

Low Current Electrospray Ionization Mass Spectrometry For Environmental Contaminants And Proteins, Taoqing Wang

Doctoral Dissertations

The introduction of electrospray ionization (ESI) in the 1980s has had a significant impact on the field of liquid chromatography-mass spectrometry (LC-MS), enabling the qualitative and quantitative analysis of small molecules in complex biological and environmental samples. NanoESI, developed in 1993, further improved sensitivity and reduced sample consumption. However, the detection limits for some environmental contaminants, such as perfluorooctanoate sulfonate (PFOS), require ppt-level detection, which necessitates preconcentration. Solid-phase microextraction (SPME) is a commonly used technique, and liquid-liquid extraction has shown promising results for water samples. Recently, the Li group has discovered femtoampere and picoampere ionization modes of ESI, which have …

Scanning Probe Microscopy Studies Of Petroleum Chemistry: Substrate-Dependent Catalytic Properties Of Mos2 And Automating Scanning Probe Microscopy With Machine Learning, Steven Arias

Doctoral Dissertations

With the growth of the population, society’s energy demands are mostly reliant on petroleum products that come from the refining of crude oil. Most of these refining reactions have been developed through averaging spectroscopic techniques, but scientists do not know exactly what is happening in these processes at the nano and atomic levels. This information is crucial when designing an efficient refining process that produces petroleum products that emit fewer harmful gases when combusting. Scanning probe microscopy techniques have become a powerful tool to look into the chemical structures found in petroleum products, to understand catalytic reactions in refining processes, …

Ultralight Axion Dark Matter With Self-Interactions, Noah James Glennon

Doctoral Dissertations

Our Universe is filled with an invisible substance, called dark matter, which dominates the ways in which structures like galaxies form. Ultralight axion (ULA) dark matter is a possible alternative to more common cold dark matter models. Self-interactions in ULA models are often discarded because they are constrained to be very small. However, in my research, I have found that including self-interactions in these models can have a significant impact on what we observe, even when the self-interaction is small. I simulate ULA dark matter with self-interactions and quantify how different phenomena, including isolated soliton oscillations, binary soliton collisions, tidal …

Embedding Explicit Metacognitive Instruction Into The General Chemistry Curriculum: Equipping Community College Students With 21st Century Stem Competencies, Sonja Gamby

Doctoral Dissertations

This work describes the development, implementation, and assessment of a curriculum- embedded metacognition instruction model. The Talking About Learning is Key (TALK) module, a 10-week, discussion-based instruction module was initially integrated into a general chemistry course at a community college in Spring 2020. This case study was assessed qualitatively using a thematic analysis to characterize student posts and replies to the Learning Management System discussion board. Course outcomes between Spring 2020 – Fall 2021 were analyzed to determine what effect participation had on course completion and final grade.Finally, the generalizability of the module was investigated using a focused case comparison …

“They Turn To Violence”: Active Shootings And The Convergence Of Hegemonic Masculinity, Race, And Perceived Injustice, Linda M. Fogg

Doctoral Dissertations

Public rampage shootings like Parkland, FL, the Las Vegas concert shooting, and Sandy Hook are a type of crime that captures national attention. As media covers these incidents and the perpetrators of them, they seek to explain why someone would commit such violence. Using active shooter data for incidents that occurred between 2000 and 2019, I examine shooter identity with particular focus on the shooter’s race, an often-unreported statistic. Finding 55.4% of active shooters are white men, interviews with 20 white men and 10 white women are analyzed for explanations for white men’s violence. These men and women describe active …

Seismic Soil-Structure Interaction And Foundation Rocking In Unsaturated Ground, Matthew Michael Turner

Doctoral Dissertations

Strong earthquake motions often cause severe damage to buildings and foundation systems, during which the interaction between the soil, foundation, and structure may dominate the seismic response. Most shallow foundations are located on, or embedded in, unsaturated and partially saturated soil deposits. Unsaturated soil layers are particularly common in zones above the water table where water can rise through different mechanisms like capillary action. Additionally, the degree of saturation throughout a soil deposit can vary both seasonally and yearly due to groundwater table fluctuation related to infiltration and evaporation. Properties of soil layers below foundations impact the seismic response of …

Influence Of O+ On Onset And Energy Release In The Earth’S Magnetotail, Akhtar Shojaei Ardakani

Doctoral Dissertations

Although the magnetotail plasma sheet predominantly consists of protons and electrons, singly charged oxygen ions, of ionospheric origin, are the third most abundant species in the plasma sheet. During disturbed times, the amount of oxygen ions in the plasma sheet and the inner magnetosphere can be comparable to the levels of the H+ ions and because of its larger mass, such a population of O+ in the near Earth magnetotail has the potential to modify the plasma sheet dynamics. It can affect the current sheet stability enhancing the growth rate of the ion tearing instability (ion scales) or alter overall …

Characterizing New Hampshire Salt Marshes Using Geospatial Technologies, Michael R. Routhier

Doctoral Dissertations

Salt marshes are coastal wetlands flooded regularly by saltwater tides and terrestrial runoff. They are highly productive and dynamic ecosystems that provide many benefits to the environment and humans. These benefits are at risk by many natural and anthropogenic drivers that are affecting the distribution of their vegetation species. Previous research shows that salt marsh vegetation around New England has been shifting from less flood-tolerant species to more flood-tolerant species in recent decades. Monitoring these ecosystems can be helpful in providing policymakers with the information they need to promote mitigation and restoration efforts for these environments. Remote sensing is one …

Deep Learning Based Predictive Models For Performance Enhancement In Bio Medical Applications, Sajila Dimagi Wickramaratne

Doctoral Dissertations

The medical field produces large quantities of multidimensional, complex, and often unstructured data. The timely interpretation of medical data is crucial for medical diagnostics. Machine learning applications are increasingly becoming popular with the ever-increasing computational ability and data availability. Machine learning methods can potentially find complicated relationships that may not be apparent in traditional clinical decision rule systems used in medical applications. Models deployed in medical applications need to be reliable, time efficient, and easy to interpret, thus making working with biosignals challenging in some cases.

The first part of the dissertation focuses on building predictive systems using existing data …

Modernism On The Edge Of The Anthropocene: The Ecological Imagination Of Forster, West, Warner, Woolf, And Eliot, Leanna Jean Lostoski-Ho

Doctoral Dissertations

By reading modernist literature on the edge of the Anthropocene, I argue in this dissertation that modernist authors, through the experimental aesthetics of their works, are able to articulate the beginnings of anthropogenic climate change in the early-twentieth century. The early-twentieth century, and particularly the interwar period, in which British modernist authors such as E. M. Forster, Rebecca West, Sylvia Townsend Warner, Virginia Woolf, and T. S. Eliot were writing coincides with the early-twentieth-century ramp up period of human activity rising to the level of a geological force before the beginning of the Anthropocene. While this dissertation does not argue …

A Comparison Of The Spectroscopically Determined Complex Refractive Indices Across Uv/Vis Wavelengths For Vanillic Acid From Two Aerosol Generation Methods, Vahid Hosseinpour Hashemi

Doctoral Dissertations

Aerosols are important because of their direct and indirect impact on the energy budget of Earth. Characterizing and understanding the physical, chemical, and optical properties of aerosols is beneficial to decrease uncertainties on the Earth’s energy budget estimations and improve climate models. Field studies characterize the real conditions and cases; however, controlling all variables, including the weather, is impossible, so only a snapshot can be obtained. Laboratory work can be a great support for field studies because controlling experimental conditions on a smaller scale is easier and targets can be achieved. Laboratory optical property studies of aerosol, even single chemical …

Cyclodextrin Impedimetric Biosensors For The Detection Of Hydrophobic Metabolites, Zahra Panahi

Doctoral Dissertations

Sepsis is a complicated medical emergency and critically ill patients suffering from infectious diseases are at a high risk for developing and dying from sepsis. According to a recent (2019) cohort study from six United States hospitals, suboptimal care (e.g., delay in antibiotics, inappropriate antibiotic therapy) is responsible for 22.7 % of in-hospital sepsis-associated deaths. In September 2020, the World Health Organization called on the scientific community to develop rapid, effective, and affordable tools to improve diagnosis, surveillance, and treatment of sepsis. Our long-term goal throughout this project is to develop a cyclodextrin (CD) impedimetric tongue that can provide early …

Narrative Insight Into How Rural, First-Generation College Students And Their Families Establish Non-Deficit, Multi-Sited Identities, Sarah Jusseaume

Doctoral Dissertations

This study explores the ways in which rural, first-generation college (RFGC) students position themselves in relation to dominant cultural master narratives and potentially competing alternative narratives related to community and family processes, norms, life pathways, and choices after college. Evidence is drawn from in-depth narrative interviews with 15 RFGC students conducted both at school and in students’ home communities. The study contributes to an anti-deficit understanding of rural first-generation college students’ college experiences and identity by focusing not on challenges and barriers but on the ways individuals both align and agentically reject dominant cultural narratives as well as the ways …

Interferometric Imaging Of Lightning Initiation Through Lofar: Uncovering The Spontaneous And Not-So-Spontaneous Nature Of Lightning Initiation In 3d, Christopher Sterpka

Doctoral Dissertations

With recent advances in instrumentation and the continued development and refinement of analytical methods, the hindrances that previously existed in uncovering the physical processes governing the behavior of lightning are diminishing. The focus of this dissertation research, interferometric imaging of lightning initiation through beamforming via the Low Frequency Array (LOFAR), will describe in detail how both the instrumentation and methods cooperate to enable the detection of lightning processes in which are below the level of the galactic and thermal very high frequency (VHF) background on individual antennas within the array. These conditions have proven to be integral in uncovering of …

Friends, Brothers, And Citizens: American Revolutionary War Patriots Of Color And Their Fight For Rights Across The Northeast, Benjamin D. Remillard

Doctoral Dissertations

“Friends, Brothers, and Citizens” examines the lives of the American Revolutionary War’s Northeastern Patriots of color. While historians have focused on these men’s decisions and actions during the war itself, this work draws attention to another vital part of their stories: the rest of their lives. To best demonstrate their impact, “Friends, Brothers, and Citizens” frames these men as a multiracial and generational cohort whose commitment to those around them clearly shaped movements to win relief and rights for people of color throughout the early republic. Chapter 1 examines these men’s wartime strategies to support their families and wider communities. …

Bridging The Digital Divide: Using Ecological Modeling To Enhance Adult Student Recruitment And Retention In Higher Education, Katherine Dawson

Doctoral Dissertations

Higher education is at a crossroads. An enrollment cliff (Kline, 2019) looms and global instability only exacerbates the need for higher and continuing education. The global COVID-19 pandemic of 2020 highlighted the problem, and despite the evolutions in technology and Internet connectivity, there is still a chasm regarding equity of digital access. This applied dissertation study examined the barriers that exist for returning adult students to higher education and the digital divide in Louisiana. The study focused on the potential adult student population of Louisiana who have some college experience but no bachelor’s degree. Designed using archival research methods, the …

Remote Staff Instruction To Implement Thorough Handwashing With Individuals With Autism, Monica Patel

Doctoral Dissertations

Behavioral skills training (BST), a behavior analytic training model including instructions, modeling, rehearsal, and feedback, has been a widely effective training method for staff, caregivers, and students. Results from BST component analyses suggest that instructions, when presented without subsequent rehearsal and feedback, are often ineffective; however, the occurrence of the COVID-19 pandemic and the physical distancing measures required to prevent its spread have increased the need for easily disseminated virtual staff training models, particularly with respect to implementing activities of daily living programs which may further help to prevent the spread of infectious disease in the workplace. Thus, we evaluated …

New Porous Nanomaterials For Battery And Supercapacitor, Yixian Pei

Doctoral Dissertations

Lithium-Sulfur batteries have a high energy storage capacity while their sulfur cathode suffers large volume change, polysulfides dissolution and shuttle effect, and capacity fading during long-term cycling. To help lock sulfur and mitigate these problems, we introduced halloysite, a natural clay material with a nanotube format, to disperse and confine sulfur nanoparticles as well as to suppress the dissolution and migration of polysulfides. Halloysite was made conductive by covering it with a glucose-derived carbon skin. Sulfur nanoparticles were then trapped in both the lumen and outside surface of individual nanotubes with a loading dosage up to 80 %. In this …

Glucose As A Mediator Of The Relationship Between Sleep And Cognitive Performance, Mercedes Gremillion

Doctoral Dissertations

ABSTRACT The Centers for Disease Control and Prevention (Y. Liu et al., 2016) reports that 34.8% of adults living in the United States of America are getting less than their recommended amount of sleep per night. Additionally, the National Sleep Foundation (2014) reports that 35% of adults have poor sleep quality. Sleep problems appear most prevalent in young adults (Hershner, 2015). Rates of type 2 diabetes mellitus are also on the rise in this specific population (Kaufman, 2002). Interestingly, research has consistently found that both sleep quantity and quality are associated with glucose levels (Ip & Mokhlesi, 2007; Padilha et …

A Primal Treatise Of Constant-Force Compliant Segment And Mechanism Design With Applications, Vamsi Lodagala

Doctoral Dissertations

"The evolution of compliant mechanisms propelled the development of constant-force mechanisms (CFMs) for various applications because of their unique characteristics. Many research endeavors have presented different techniques that often involve some optimization to design the CFMs. However, the mechanics of the generation of constant force at the elemental level is not well understood. This research effort theorizes and validates that simple, compliant segment with different boundary conditions, subjected to axial loading, produce near-constant force without the need for design optimization. Analytical models are developed based on the pseudo-rigid-body model (PRBM) concept to predict their force-displacement behavior, and to establish that …

Novel Quantum Materials For Spintronic And Opto-Electronic Applications, Ali Sarikhani

Doctoral Dissertations

"Multi-functional quantum materials play a crucial role in the development of spintronics and opto-electronics, as their properties can greatly influence device performance. For instance, in spintronics, materials such as ferromagnetic half-metals, Giant Magnetoresistants (GMR), and magnetic semiconductors have been extensively studied due to their ability to manipulate the spin of electrons for applications in magnetic storage. In opto-electronics, materials such as Diluted Magnetic Semiconductors (DMS) and non-oxide Transparent Conductors (TC) offer advantages such as tunable bandgap and high absorption coefficients, which enable improved device performance.

For this purpose, we have experimentally investigated the compounds that have shown theoretically interesting physical …

Electrodeposition Of Epitaxial Wide Bandgap P-Type Semiconductors And Copper Metal For Energy Conversion And Flexible Electronics, Bin Luo

Doctoral Dissertations

"Epitaxial electrodeposition is a simple, low-cost technology to produce highly ordered materials on single-crystal surfaces. This research focuses on the epitaxial electrodeposition of wide bandgap p-type semiconductors and epitaxial Cu thin films via a self-assembled monolayer for energy conversion and flexible electronics. Paper I introduces the epitaxial electrodeposition of hole conducting CuSCN nanorods onto Au (111) surface, and lift-off to produce flexible and transparent foils. Highly ordered CuSCN could serve as an inorganic transport layer in various opto-electronic devices such as perovskite solar cells, LEDs, and transistors. An ordered and transparent CuSCN foil was also produced by epitaxial lift-off following …

Application Of Modeling Methodologies To Improve An Emergency Departments Workflow, Prachita Humane

Doctoral Dissertations

"The healthcare system in the United States is complex and challenging to understand, and the emergency department (ED) serves as a bridge between outpatient and inpatient care. According to the Centers for Disease Control and Prevention, over 130 million people visited emergency rooms in the United States in 2018. The ED is composed of multiple subunits and components that make it difficult to comprehend fully. In this study, a combination of engineering analysis methods was used to identify and understand the issues in the ED.

The first contribution of this research involved collecting data through job shadowing of human entities …