Digital Commons Network^™

Housing Buyouts At The Intersection Of Flooding And Toxins: A Case Study Of Cheraw, South Carolina, Victoria Ponds

Theses and Dissertations

As climate change increases extreme weather events, efforts of managed retreat will also increase, particularly through housing buyout programs. The largest scale housing buyout programs are run through the Department of Housing and Urban Development (HUD) and the Federal Emergency Management Agency (FEMA). These buyout programs focus primarily on flood hazards and exclude anthropogenic hazards. This policy is problematic in the modern technological age where compound hazards, including those involving toxin releases, are occurring more frequently. In this thesis, I investigate how disaster policies account for the intersection of these hazards in Community Development Block Grant-Mitigation buyouts in Cheraw, South …

Statistical Inference Based On Elliptically Symmetric Distributions For Directional Data, Zehao Yu

Theses and Dissertations

Directional data arise in many scientific fields such as meteorology, oceanography, geology, zoology, and biomechanics. Geometrically, directional data lie in a spherical space. Although not in a spherical space, compositional data, such as microbiome data, can be mapped from a simplex to a spherical space via the component-wise square-root transformation. Other examples where compositional data emerge as a subject of interest include compositions of minerals in rocks, compositions of chemical mixtures, investment portfolios, and demographic composition of a population. This dissertation aims to develop inference procedures for analyzing directional data in general initially, with later focus shifted to the transformed …

Placebos, Rhetoric, And The Power Of Expectation, Jennifer M. Reeher

Theses and Dissertations

Placebos, Rhetoric, and the Power of Expectation examines the relationship between persuasion and health to determine what interventions rhetoric could make in the interdisciplinary field of placebo studies. This exploration of the relationship between rhetoric and placebo responses relies on non-anthropocentric definitions and theories of rhetoric as well as a multifaceted archive that includes patient narratives, clinical intake forms, and peer-reviewed scientific studies of condition-specific placebo responses. The impact of this investigation spans the practical and the theoretical. First, rhetorical study highlights the importance of a patient’s perception of care in patient recovery. To this end, rhetoric offers audience-focused methods …

One-Dimensional Cores Of Peano Continua, Shogo Starr

Theses and Dissertations

In this paper, we define a berbering of a Peano continuum, which is the space one gets by attaching a null sequence of circles to a countable dense subset of a Peano continuum. The topology of a berbering is one that recognizes which circles are small, in the sense that any neighborhood of the original Peano continuum will entirely contain all but finitely many of the attached circles. We then show that given a berbering of any simply connected, locally simply connected Peano continuum $Y$, there exists a one-dimensional Peano continuum $X$ and a map from $X$ to the berbering …

Optimal Limb Regeneration Strategies In Hemigrapsus Sanguineus, Laura S. Fletcher

Theses and Dissertations

Diet quality and energy allocation influence an individual’s life-history traits by determining how much energy is available for processes such as growth and reproduction. One common method of assessing diet quality involves measuring gut length or size, which is typically inversely related to diet quality. However, this often requires animal sacrifice and time- consuming dissections. Similarly, many traditional bioenergetics models fail to capture the context-dependence of energy allocation, as these models rely on fixed energy allocation rules. One such rule is the κ-rule of dynamic energy budget theory, which assumes a fixed proportion (κ) of assimilated energy is always allocated …

Feature Engineering For Grain Boundaries And Other Variable-Sized Atom Clusters, C. Braxton Owens

Theses and Dissertations

Obtaining microscopic structure-property relationships for grain boundaries are challenging because of the complex atomic structures that underlie their behavior. This has led to recent efforts to obtain these relationships with machine learning, but representing a grain boundary structure in a manner suitable for machine learning is not a trivial task. There are three key steps common to property prediction in grain boundaries and other variable-sized atom clustered structures. These are: (1) describe the atomic structure as a feature matrix, (2) transform the variable-sized feature matrices of different structures to a fixed length common to all structures, and (3) apply machine …

Wind-Carved Wonders: An Aerial Study Of Yardangs In The Puna, Argentina Using Drone And Satellite Imagery, Derek Gordon Ashliman

Theses and Dissertations

Yardangs, elongated landforms sculpted by wind erosion, are prominent features in the Campo de Piedra Pomez (CPP) region of the Puna-Altiplano Plateau, Argentina. This study explores their formation and evolution through the examination of a 6 km by 0.5 km area captured in 2019 and a 5 km by 0.5 km area in 2024. High-resolution drone imagery and satellite data were employed to classify and quantify yardangs, gravel, and underlying bedrock across a vast study area. The research reveals a variation in yardang distribution and morphology from northwest (windward) to southeast (leeward), noting a significant decrease in yardang and bedrock …

Fission Product Thermodynamics, Solubility, And Extraction In Molten Salts And Lead, Richard Lee Fitzhugh

Theses and Dissertations

Chemical behavior of fission products in systems relevant to two major advanced nuclear reactor systems, namely the lead-cooled fast reactor (LFR) and molten-salt reactor (MSR), has been studied with a heavy emphasis on thermodynamics. The behavior of fission products in molten salts is examined from a theoretical perspective, with an emphasis on the standard state used to define the thermodynamic activity. A standard state extrapolated from infinite dilution behavior, which is fairly common practice in electrochemistry, is found to facilitate faster, easier, and simpler analysis while retaining much of the accuracy of the complex Modified Quasichemical Model. Inductively-coupled plasma mass …

Dynamics Of Dissolved And Particulate Trace Metals In A Snowmelt-Dominated Stream, Provo River, Utah, Usa, Kendra Louise Caskey

Theses and Dissertations

Trace element concentrations vary substantially during snowmelt runoff, with changes in the dissolved versus particulate fractions potentially impacting their movement at the catchment scale. To investigate trace element behavior in a snowmelt dominated stream, we measured concentrations in different size fractions in the Provo River (northern Utah, USA). We sampled the river at three locations during water years 2016-2018 and 2021-2023 for trace metal and major ion concentrations. During the final year, we collected three fractions (unfiltered, <0.45 µm filtered, and <0.22 µm filtered) for trace metal chemistry and calculated the particulate concentration as the difference between the unfiltered and 0.45 µm fraction. Stream measurements included pH, discharge, turbidity, and fluorescent dissolved organic matter (fDOM). We also sampled water sources (soil water, ephemeral streams, and snowpack) to compare trace metal concentrations across the watershed with the stream. Trace metal (Al, Be, Fe, Pb) and rare earth element (REE +Y) concentrations had the highest particulate and dissolved concentrations during snowmelt runoff. In contrast, major cations were primarily found in the dissolved fraction with lowest concentrations during snowmelt runoff. Major cation and particulate metal concentrations increased from upstream to downstream. The increased trace metal and REE + Y concentrations during snowmelt relative to baseflow may be explained by increased discharge and associated increased turbidity and fDOM. A comparison with water sources suggests that dissolved and particulate trace metals in the stream are sourced from flushed soil water, as trace metal transport through the watershed is facilitated by suspended sediment and dissolved organic matter. For most of the trace metals and REE +Y, concentrations were similar in the <0.45 µm and <0.22 µm fractions. Yet Al tended to have higher concentrations in the <0.45 µm fraction, suggesting a colloidal form of Al between 0.22 µm and 0.45 µm may exist. Differences from upstream to downstream may be related to changes in pH, from ~7 at the upper site to ~8 at the lower sites, which would change sorption capacity, saturation indices, or speciation. Our study demonstrates that trace metal concentrations are variable during snowmelt as the metals interact with suspended particles or dissolved organic matter and are influenced by changing water chemistry, with implications for understanding water quality impairments in snowmelt-dominated streams.

Void Formation During Liquid Composite Molding Under Varied Pressure With Mechanical Properties Validation, Neil Russell Thompson

Theses and Dissertations

Composite materials have revolutionized products and how they are manufactured. Most large-scale aerospace companies utilize a carbon fiber pre-impregnated with a resin in conjunction with an autoclave to minimize voids, but it is very expensive and requires a great amount of space. The less expensive alternative to prepreg-autoclave processes is known as Liquid Composite Molding (LCM), in which the resin is brought into a mold via overpressure on the resin supply or by a vacuum in the mold. But this process is more prone to voids due to bubble formation. Voids are a critical issue as common failure modes such …

Linguistic Perspectives In Ecuadorian Amazonian Kichwa, Max Nathan Jensen

Theses and Dissertations

Despite the fact that Amazonian Kichwa speakers consider themselves to be both linguistically and culturally distinct from their highland counterparts (Ennis 2020; Wroblewski 2012), relatively little has been done to document their language attitudes and how these attitudes are reflected in their speech. This study shows this to be a valid line of questioning. Using commentary from interviews with Amazonian Kichwa people, I show that views on the status and future of the language are divided, as well as perspectives on the role of non-Kichwa sources like schools and governments in language maintenance. Older and native speakers of Kichwa are …

Deep Learning For Source Localization In A Laboratory Tank, Corey Emerson Dobbs

Theses and Dissertations

Deep learning has been applied to underwater acoustics problems in many forms. One difficulty in applying deep learning techniques to ocean acoustics is the spatially and temporally varying environmental properties. Another challenge is the lack of labeled data for training large networks. The overall goal of this work is to develop deep learning approaches for source localization that can be adaptable to different conditions. In this work, a convolutional neural network was trained on acoustic data measured in a water tank, while the water was at room temperature, to predict source-receiver range. Tests were done to ascertain ideal quantities of …

An Investigation Of University General Education Assessment Practice, Joseph H. Hanks

Theses and Dissertations

Many-facets Rasch modeling (MFRM) is an effective way to compensate for rater effects (e.g., rater leniency/severity) in the ratings assigned during rater-mediated assessment. While a fully crossed MFRM rating design, in which all raters rate every rating object, is the ideal from a psychometric standpoint; fully crossed designs are rarely implemented in practice because of the resource burden they impose on assessment personnel. Thus, incomplete rating designs, where each rater does not rate all rating objects, are the norm. However, unless assessment personnel consciously attend to a variety of aspects of rating design, incomplete rating designs may suffer from design …

Emergent Leadership, L2 Oral Proficiency, And Social Networks During Study Abroad, Nicole C. Whitby

Theses and Dissertations

Research shows that study abroad (SA) provides a unique, yet varied outcome for students seeking to improve their target language oral proficiency during study abroad SA (Freed et al., 2004). Contemporary work in second language acquisition (SLA) during SA has looked beyond individual behaviors of sojourners to analyze social networks as a structure with significant influence on outcomes, yet emergent leadership has not been addressed within social network analysis in SA. To address this gap the current study employed a computational social network approach. This mixed methods study analyzes the social networks of 30 SA sojourners from a large private …

Linking Geospatial Trends And Geochemical Fingerprints To Anthropogenic Phosphorus Dust Deposition In Subalpine Soils, Austen Michael Lambert

Theses and Dissertations

This study shows that fugitive emissions associated with the surface mining of phosphate rock are a significant phosphorus (P) source to surface soils in northeastern Utah. Phosphorus is a nonrenewable resource essential for all life. Anthropogenic alterations to the P-cycle have led to widespread P pollution, and the unsustainable management of P has led to the threat of global depletion of P resources. Thus, accounting for both natural and anthropogenic flow paths of P is essential for the conservation and pollution reduction of P. One such source of human alteration to the P-cycle is the mining of phosphate rock. Mining, …

Killers That Once Were Humans: Reading The Role Of Modern Law Via Instrumental Rationality, Momen Abdelbari Hassan

Theses and Dissertations

For Max Weber, the process of modernization is the process of rationalization in which it includes every realm in our modern life, such as the economy, science, organization, education, and law. However, this kind of rationalization has created coercive and inhumane conditions because rationalization has converted to being instrumental (value-free) without regard to any transcendental or moral values. The inhumane paradigm has become the only fate of our world. The vision needs rational domination to be achieved through formal rational law. Modern law, along with bureaucratization, has paved the road to rational political domination. This kind of domination captures human …

Microbial Hydrolysis Process To Improve Anaerobic Digestion For Biofuel Generation, Caleb Michael Jensen

Theses and Dissertations

Human development results in billions of tons of waste per year, which contributes to major issues such as pollution, climate change, and habitat destruction. In this study, we explored the impact of bacterial inoculation on volatile fatty acid (VFA) production, volatile solids (VS), and gas output in anaerobic digesters under different substrate treatments. Our results reveal that bacterial inoculation significantly boosts VFA levels, especially acetic acid, with both Caldicellulosiruptor bescii and mixed Caldicellulosiruptor, cultures showing notable differences compared to controls, especially in untreated manure and WAS treatments. Acetic acid and VS/TS increased in untreated WAS when inoculated with C. bescii …

The Cofactor Matrix For Optimized Normal Transformations & Real-Time Caustics And Refractions Using Signed Distance Fields, Dane William Christensen

Theses and Dissertations

This thesis contains two distinct manuscripts both focused on real-time rendering research; an abstract for each is provided: 1. We survey methods for mapping normal vectors to a transformed surface with emphasis on the cofactor matrix form. We demonstrate that the cofactor matrix uniquely and correctly supports matrix transformations that are rank deficient or have negative determinants, while also generalizing to operations such as rotation, scaling, translation, and shearing. We derive and demonstrate the completeness of this new convention in contrast to other approaches, while also establishing its computational efficiency benefits. 2. We present SDF volumes as an efficient datastructure …

Quiescent Condensation Heat Transfer On Vertical Cicnt Structured Superhydrophobic Surfaces, Clint Mach Hubbard

Theses and Dissertations

This study experimentally investigates the impact of the subcooling magnitude, the carbon-infiltrated carbon nanotube (CICNT) diameter, the time duration of condensation, and amount of non-condensable gases on the nature of dropwise condensation and condensate removal, and heat flux and heat transfer coefficient measurements. Experiments were conducted in a vacuum chamber on a vertically oriented test CICNT surface. The CICNT diameter was varied between 15-120 nm and the subcooling ranged from 0.5-9 °C. Each test ran for a duration of at least one hour and video was recorded at 20-minute intervals. Three modes of condensation were observed: drop jumping, drop wetting …

A Sensitivity Equation Framework For Parameter Estimation In Dynamical Systems, Joshua Newey

Theses and Dissertations

We present a new framework for understanding parameter estimation in dynamical systems. The approach is developed within the modeling approach of continuous data assimilation. We outline the basic assumptions that lead to our derivation. Under these assumptions we show that the parameter estimation turns into a finite dimensional nonlinear optimization problem. We show that our derivation reproduces and extends the algorithm originally developed in [9]. We then implement these methods in three example systems: the Lorenz '63 model, the two-layer Lorenz '96 model, and the Kuramoto Sivashinsky equation. So as to remain sufficiently general, our derivations are largely formal; we …

Investigating The Engagement Behaviour Of Omni-Digital Banking Customers, Guhan R

Theses and Dissertations

Digital banking is rapidly growing in India, positioning the country as the global leader in digital banking users as of 2022, with approximately 295.5 million users, surpassing the United States by over 70 million. This growth reflects a shift from Omni-channel to Omni-digital banking, where customers exclusively use digital platforms, enhancing digital engagement. However, research specifically focusing on Omni-digital banking behavior remains limited, with most studies concentrating on online and mobile banking.

To address this gap, a study was conducted using a new research model based on UTAUT2 variables, targeting Omni-digital banking customers in Tamil Nadu. A sample of 1,082 …

Behavior Of Reinforced Lightweight Cellular Concrete Backfill For Mechanically Stabilized Earth Walls With Welded Wire Reinforcements, Cole Max Larsen

Theses and Dissertations

Lightweight cellular concrete (LCC) consists of a mixture of cement, water, and a pre-formed foam. The pre-formed foam entrains a high proportion of air voids into the cement water slurry at the time of casting, decreasing the product's overall weight. LCC is also a viable alternative when low native soil strengths prevent the use of traditional backfill methods through mitigating settlement and increasing strength. Due to these benefits, the use of LCC behind mechanically stabilized earth (MSE) walls is gaining popularity. Despite LCC gaining popularity behind MSE walls, the exact nature of the failure envelope is poorly understood. The pullout …

A Comparative Analysis Of Human And Machine Translation Quality, Catherine Marshall

Theses and Dissertations

A common question raised by both translators and Machine Translation developers is Will Machine Translation (MT) ever attain the level of Human Translation (HT) quality? Researchers have argued that MT will likely never replace HT completely because MT systems cannot anticipate all the specifications for possible translation projects (Melby & Hague, 2019) and because MT systems lack cultural understanding (Latief et al., 2020). Researchers have also argued that the use of machines should be focused on augmenting humans, rather than trying to imitate them (Brynjolfsson, 2022). The purpose of this study is to determine how the quality of MT differs …

Tools For Planning Multi-Axis Vibration Qualification Tests, Marcus Edward Behling

Theses and Dissertations

Vibration qualification testing is necessary to ensure that components will endure vibration-induced damage in flight. Multi-axis tests have shown the potential for improvement over single-axis tests, though they require increased planning. This work focuses on planning three critical aspects of these tests: the amount of operational next assembly to include in the test, the size of shakers to use, and the number of shakers to use. Next assembly selection is studied by varying the amount of next assembly included in the lab test, performing physical tests, and comparing the accuracy of environment reconstruction in each test. In doing so, a …

Zno Based Chemiresistive Sensor For Ammonia Detection, Anna Thomas

Theses and Dissertations

This work aims on the development of nanostructured sensing elements based on ZnO for detecting ammonia, specifically designed for applications in poultry and farm fields. To achieve this objective, we prepared sensing elements, including ZnO, CuO, WO3, NiO, ZnO/CuO, ZnO/WO3, ZnO/NiO, and rGO/ZnO, using the spray pyrolysis technique. Structural, morphological, and compositional analyses were studied using X-ray Diffraction (XRD), Field Emission Microscope (FESEM), and X-ray Photoelectron Spectroscopy (XPS), respectively. The vapour/gas detection studies of fabricated sensing elements were carried out in a home built sensing chamber.

The single oxides, ZnO, CuO, WO3, demonstrated ammonia detection in the range of 5-100 …

Examining The Effectiveness Of Treated Biochar In Removing Nitrates And Phosphates From Varied Soil Lithology, Benjamin Taylor

Theses and Dissertations

Nutrient loss has been a problem in the agricultural field for as long as fertilizers have been used. Not only is it cost inefficient, it can be an environmental hazard when these nutrients enter the watershed. Biochar, both untreated and treated, have been shown to improve soil’s ability to retain nutrients and increase residency time. However, the sorption capacity of biochar when amended with different soil types, has not been explored sufficiently. Batch reactors and sediment columns were used to determine the efficiency of magnesium oxide treated biochar in three different soil types to retain nitrates and phosphates. The results …

An Updated Secondary Education Program Strengthening Literacy Instructional Capacity Through Targeted Coursework And Teacher Residency, Kaleb Andrew Smith

Theses and Dissertations

Assessment data continues to show middle and high school students struggling with literacy. As literacy is intricate to every course at the secondary level, students who struggle with reading and writing struggle across the curriculum. While this glaring issue persists, many teachers take few courses to train them to implement the instructional strategies needed to help students overcome deficits and succeed in the disciplinary coursework of secondary school. The goals of the project were to decide which content should be included in a required program of study for secondary education pre-service teachers to increase capacity and improve classroom readiness and …

Creating A Chronology Of Claiborne (22ha501): Revisiting And Revising Radiocarbon Assays Of A Poverty Point Site, Olivia Catherine Baumgartel

Theses and Dissertations

The Claiborne site in Hancock County, Mississippi has been considered part of a culture within Poverty Point’s control since it’s discovery in the 1950’s. In this study, I sampled and ran new five new radiocarbon dates from the collections at Mississippi State University. I then created a chronometric hygiene scale, ranked the new and current dates, removed dates from models that did not have the criteria needed to continue. This thesis created a new chronology for the site, placing it within the timeline of Poverty Point but also related it to the Archaic shell mounds in Southeastern North America.

How Teacher-Student Relationships Affect Child And Adolescent Resilience, Tashina R. Vanderwoude

Theses and Dissertations

The significance of positive relationships, particularly between teachers and students, in fostering resilience among children is well-established. While various studies have delved into the dynamics and impacts of these relationships, there is a notable gap in research that directly assesses how teacher-student bonds influence students’ resilience levels. This study aims to bridge the gap by examining students’ perceptions of their relationships with teachers and how these perceptions correlate with their reported resilience levels. Participants (n = 59) included middle and high school students recruited from a school district in northeastern Mississippi. Participants completed surveys measuring their perception of their relationship …

Effects Of An Auditory Versus Visual Stimulus On Reaction And Response Time During Countermovement And Squat Jumps, Russell K. Lowell

Theses and Dissertations

This investigation examined the differences in REACT, RT, and jumping performance for the countermovement jump (CMJ) versus squat jump (SJ) when beginning the movement by responding to auditory (AUD) versus visual (VIS) stimuli. The secondary purposes of this investigation are to examine gender and physical activity level differences of the aforementioned metrics and the relationship between maximal strength, REACT, and RT. Twenty-eight participants (females = 16 and males = 12) were split into three groups (low = 6, moderate = 10, and high = 12) based on their perceived physical activity levels in accordance with ACSM physical activity requirements. Over …