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Enhancing Fuel Performance Of Molten Salt Reactors Through Improved Thermophysical Property Data, High-Fidelity Simulation, And Advanced Control Strategies, Jackson Seth Ivory
Enhancing Fuel Performance Of Molten Salt Reactors Through Improved Thermophysical Property Data, High-Fidelity Simulation, And Advanced Control Strategies, Jackson Seth Ivory
Theses and Dissertations
The deployment of molten salt reactors (MSRs) as next-generation nuclear technology requires accurate thermophysical property data, validated system models, and advanced control strategies to ensure safe and economically competitive operation. This dissertation, Enhancing Fuel Performance of Molten Salt Reactors Through Improved Thermophysical Property Data, High-Fidelity Simulation, and Advanced Control Strategies, integrates experimental measurements, thermal hydraulic simulation, and model predictive control (MPC) to enhance understanding of MSR fuel behavior under steady state and transient conditions. New density and heat capacity measurements of UF4-FLiNaK molten salts were obtained using Archimedean and differential scanning calorimetry methods, respectively, to address critical gaps for fueled …
Utah Lake From Space: Analysis Of Sentinel 2 And Modis Data Shows Spatiotemporal Trends And Patterns In Chlorophyll-A, Turbidity, And Temperature, Kaylee Brook Tanner
Utah Lake From Space: Analysis Of Sentinel 2 And Modis Data Shows Spatiotemporal Trends And Patterns In Chlorophyll-A, Turbidity, And Temperature, Kaylee Brook Tanner
Theses and Dissertations
Harmful algal blooms (HABs) are a serious and growing risk to waterbodies around the world. Excessive algal growth, especially when it involves cyanobacteria, impairs the functioning of aquatic ecosystems and threatens the health of humans and animals using the water. There is currently great interest in developing effective prevention and mitigation strategies for these blooms, particularly in ecologically and economically vital freshwater lakes. Such development, however, requires detailed understanding of HAB drivers and dynamics, which can be highly complex and difficult to characterize. High-frequency, high-resolution imagery from earth observation satellites provides spatially and temporally comprehensive data on global lakes--data which …
Spatial Ecology And Population Dynamics Of Chukar Partridge, Jacob Taft Barnes
Spatial Ecology And Population Dynamics Of Chukar Partridge, Jacob Taft Barnes
Theses and Dissertations
Chukar (Alectoris chukar) are a non-native bird that has naturalized in North America following its introduction over a century ago. Today, the species supports hunting opportunities in 11 U.S. states and one Canadian province. Despite its wide distribution and recreational value, key aspects of chukar ecology remain poorly understood. Limited information is available on the species' spatial ecology, including patterns of space use. Likewise, information regarding the influence of weather on population dynamics of chukar has not been formally conducted. As part of our investigation, we evaluated the space use of chukar in western Utah, USA utilizing GPS transmitters (Chapter …
Modeling Network Growth Via Generalized Isospectral Reductions, David Thomas Litster
Modeling Network Growth Via Generalized Isospectral Reductions, David Thomas Litster
Theses and Dissertations
Many real-world networks also exhibit a variety of symmetries. In this thesis we study equitable partitions and isospectral reductions, both of which are generalizations of symmetries. We formalize the relationship between these two types of generalized symmetry through the study of invariant subspaces. We then use recent results about the presence of equitable partitions in real-world networks to develop a network growth model that introduces similar structures, thereby introducing symmetries similar to those in real world networks.
Intrinsic Stability Of Controlled Systems Via Gershgorin-Type Estimates, David Friedbaum
Intrinsic Stability Of Controlled Systems Via Gershgorin-Type Estimates, David Friedbaum
Theses and Dissertations
Time delays are an inherent feature of real-world dynamical systems, arising whenever information, matter, or energy requires non-negligible time to propagate. Even small delays can destabilize systems that are otherwise well behaved, yet most standard control designs--such as PID or LQR--do not explicitly account for them and may fail when delays are present. This thesis investigates the stability of controlled dynamical systems subject to arbitrary time delays and develops new tools to determine when such systems remain stable. Our approach builds on the notion of intrinsic stability, a strong form of global stability introduced by Webb and Bunimovich, which guaranties …
Characterizing Temperature-Dependent Properties Of Fat For Improving High Intensity Focused Ultrasound Simulations, Brian Easthope
Characterizing Temperature-Dependent Properties Of Fat For Improving High Intensity Focused Ultrasound Simulations, Brian Easthope
Theses and Dissertations
High-intensity focused ultrasound (HIFU) is a non-invasive therapeutic technique that relies on the precise delivery of acoustic energy to ablate diseased tissue. The presence of subcutaneous fat can significantly alter focal accuracy and treatment efficiency due to its distinct thermal and acoustic behavior. This study characterized the temperature-dependent thermal conductivity, thermal diffusivity, specific heat capacity, acoustic attenuation, and acoustic velocity of human subcutaneous fat to improve pretreatment modeling for HIFU therapies. Measurements were performed using a dual needle probe for thermal conductivity and diffusivity, differential scanning calorimetry for specific heat capacity, radiation force balance for attenuation, and through-transmission methods for …
Game-Theoretically Optimal Strategies In Baseball, William Michael Melville
Game-Theoretically Optimal Strategies In Baseball, William Michael Melville
Theses and Dissertations
Baseball players and their managers make numerous decisions that can have a significant effect on the result of the game. The effectiveness of their decision-making strategies depend on the strategies played by their opponents. For example, throwing a first-pitch fastball down the middle is a good strategy against a hitter who always takes the first pitch, but it is a risky strategy against a hitter who likes to swing at the first pitch and who is good at hitting fastballs. Additionally, any payoff a player receives from playing a strategy comes at the expense of their opponent. A batter cannot …
Play-Based Assessment Of The Cardinal Principle, Allyssa Sonnefeld Leavitt
Play-Based Assessment Of The Cardinal Principle, Allyssa Sonnefeld Leavitt
Theses and Dissertations
Gelman and Gallistel (1986) determined five counting principles that are essential for successful counting, including the cardinal principle where children understand that the last number counted represents the quantity of a set of objects. The traditional How many? task and the Give-n task are the most common tasks that have been used to assess whether children understand the cardinal principle. However, many researchers claim that these tasks either overestimate or underestimate children's understanding of the cardinal principle. Some researchers (Baroody & Pellegrino, 2023) suggest that embedding the traditional How many? task in a game may improve its validity. In this …
Plant Preservation: The Contribution Of Bacteriophage And Transposons To Pathogenic Xanthomonas Evolution, And The Demographic And Reproductive Analysis Of Castilleja Parvula, Ciara A. Green
Theses and Dissertations
Plant preservation, whether through disease research or endemic extinction analyses, plays an important role in the relationship between humans and our surrounding environment. In these analyses, both the role of mobile elements in the evolution of pathogenic Xanthomonas sp. bacteria, and the demographic and reproductive analysis of Castilleja parvula, an imperiled alpine plant, are evaluated. Xanthomonas species are one of the top agricultural threats, and are known to evolve rapidly. Until now, the contributions of mobile elements and particularly bacteriophage have not been thoroughly evaluated. The contribution of these agricultural diseases to food insecurity and the devastation of crops that …
Inelastic Behavior Of Three-Story Buildings With Concrete-Filled Composite Plate Shear Walls Subjected To Wind Loads, Joshua John Blom
Inelastic Behavior Of Three-Story Buildings With Concrete-Filled Composite Plate Shear Walls Subjected To Wind Loads, Joshua John Blom
Theses and Dissertations
Although elastic design of the main wind force resisting system in a building is the conventional approach it is not always desirable. In this study, nonlinear static and dynamic analyses are used to predict the inelastic behavior of a three-story building with concrete-filled composite plate shear walls subjected to wind loads. To explore the potential for inelastic design, two types of planar composite shear wall buildings are examined: individual shear walls designed using an elastic approach, and coupled shear wall pairs designed using an inelastic approach adopted from seismic design provisions. Nonlinear static "pushover" analyses are run using an assumed …
Experimental Testing Of Axially Loaded Fuse Plates Without Continuous Buckling Restraint, Rebekah Elizabeth Higgins
Experimental Testing Of Axially Loaded Fuse Plates Without Continuous Buckling Restraint, Rebekah Elizabeth Higgins
Theses and Dissertations
Current seismic design practice is to design structures to avoid collapse and protect life. Buildings are designed to resist seismic loading through strength and ductility. In moment frames, this ductility traditionally comes from inelastic deformation of beams. Moment frame connections move inelastic deformation away from the column and allow a plastic hinge to form in the beam. This plastic hinge prevents collapse but leaves the building difficult to repair. Some proprietary moment frame connections address this issue with replaceable fuse plate connections. These fuse plate connections move the plastic hinge out of the beam and into the replaceable fuse, allowing …
The Negotiation Of Identities Through Humorous Discourse In Political Resistance: An Analysis Of Bassem Youssef's 'The B+ Show', Howaida Aref
Theses and Dissertations
This study examines the strategic use of humorous discourse in negotiating identities and expressing political resistance during the 2011 Egyptian Revolution, focusing on Bassem Youssef's satirical YouTube show, "The B+ Show." Employing a mixed-method approach that combines Grice's maxims of cooperative communication and Fairclough's critical discourse analysis framework, the research investigates how humor functioned as a tool for challenging hegemonic narratives and power dynamics through constructing and deconstructing identities in a volatile sociopolitical context. The analysis reveals that Youssef skillfully exploited various discursive resources, particularly intertextuality and the flouting of conversational maxims, to generate implicatures that effectively debunked negative representations …
An Analysis Of Student Performance In Elementary Linear Algebra At Brigham Young University, Adrienne Irene Christensen
An Analysis Of Student Performance In Elementary Linear Algebra At Brigham Young University, Adrienne Irene Christensen
Theses and Dissertations
This study investigates different factors that influence performance in the Elementary Linear Algebra (ELA) course taught at Brigham Young University. These factors include student characteristics such as true freshman status and college enrollment, and content-specific factors such as how performance on essential topics affects overall performance in the course. To analyze the various research questions posed in the study, I used robust linear mixed effects models with random effects controlling for the hierarchical structure of the data. The statistically significant results from these models indicate that (i) true freshmen perform better than other students on exams and in the ELA …
Studying Causal Inferences For Student Success In Higher Education, Prabesh Shrestha
Studying Causal Inferences For Student Success In Higher Education, Prabesh Shrestha
Theses and Dissertations
Higher education institutions strive to support students in achieving their academic goals through targeted interventions and data-driven strategies. This study analyzed 19 variables, spanning student demographics, enrollment patterns, and institutional interventions, to identify predictors of students completing all enrolled courses in a semester. Using random forest, logistic regression, and bootstrap forest models, we assessed variable importance and derived causal estimates to determine their impact. Results from causal analysis indicate positive effects from session type, term load, referrals, kudos, flags, and scholarships, while negative impacts were associated with location, course delivery method, enrollment status, advisor contact, and registration interval. These findings …
Measuring And Modeling Nonlinear Vibrations In Structures With Mechanical Joints, Suzanna Gilbert
Measuring And Modeling Nonlinear Vibrations In Structures With Mechanical Joints, Suzanna Gilbert
Theses and Dissertations
Many assembled structures have bolted or riveted joints. Aside from providing a convenient method of assembly, mechanical joints have an important effect on the structure's dynamic response to its environment. Friction and microslip within the joints help to damp out unwanted vibration. However, the joints also introduce nonlinearity into the response. Most notably, the natural vibrational modes of the structure no longer have constant natural frequencies and damping ratios. Rather, they shift as a function of vibration amplitude. Several methods exist to characterize the dynamics of nonlinear systems, yet they are generally validated on simple benchmark structures, and many still …
The Relationship Between Light Physical Activity And 10-Year Weight Change In 2,868 U.S. Adults: A National Health And Nutrition Examination Survey Investigation, Chloe Diane Cory
The Relationship Between Light Physical Activity And 10-Year Weight Change In 2,868 U.S. Adults: A National Health And Nutrition Examination Survey Investigation, Chloe Diane Cory
Theses and Dissertations
The prevalence of obesity has steadily increased over the past several decades. About 13.4% of Americans aged 20-74 had obesity in 1960-1962 and the prevalence has steadily increased to 40.3% in 2021-2023--more than a 3-fold increase. PURPOSE: The aim of this study was to evaluate the relationship between time spent in light physical activity (LPA) and 10-year weight change in a random sample of 2868 women and men representative of the U.S. adult population. METHODS: Data were used from the National Health and Nutrition Examination Survey (NHANES) from the 2003-2006 data cycles. Participants were limited to non-pregnant U.S. …
A New Model For Predicting Two-Zone Parameters Based On Geometric Modifications In Computational Fluid Dynamics Simulations, Jason B. Metten
A New Model For Predicting Two-Zone Parameters Based On Geometric Modifications In Computational Fluid Dynamics Simulations, Jason B. Metten
Theses and Dissertations
This study uses Computational Fluid Dynamics (CFD) to create a new and improved model for key Two-Zone modeling parameters, 𝜒 and 𝛿2𝑝. It explores how geometric changes to centrifugal compressors impact these modeling parameters. While centrifugal impellers are an important part of many systems, the flow through such impellers is inherently complex, making performance often difficult to predict. There are many approaches for modeling this complex flow environment, one method being the Two-Zone model developed by Dave Japikse. Values for 𝜒 and 𝛿2𝑝 are often determined from data obtained from test rigs or correlations. In this study high-fidelity CFD simulations …
Sex Disparities In Prescription Opioids Associated Cardiovascular Adverse Events, Li Ma
Sex Disparities In Prescription Opioids Associated Cardiovascular Adverse Events, Li Ma
Theses and Dissertations
The opioid crisis in the United States has evolved from a medical response to pain into a nationwide public health emergency. The prescription opioids (POs) – associated cardiovascular adverse events (CVAEs) remain insufficiently studied, especially in relation to sex disparities. This dissertation investigates sex disparities in PO-associated cardiovascular adverse events (CVAEs) through an analytic framework integrating artificial-intelligence-assisted literature mining and real-world pharmacovigilance analytics. In the analytic framework, first, AI powered topic modeling was employed to uncover POs-associated CVAEs risks with a focus on sex differences. A total of 1,837 PubMed abstracts were analyzed using two methods, Latent Dirichlet Allocation (LDA) …
Faculty Adoption Of The Canvas Learning Management System: An Application Of The Utaut2 Framework, Alyssa Hutcheson Mckinley
Faculty Adoption Of The Canvas Learning Management System: An Application Of The Utaut2 Framework, Alyssa Hutcheson Mckinley
Theses and Dissertations
This study aimed to examine faculty adoption of the Canvas LMS at a public university through the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) framework. Survey data were collected from faculty across multiple colleges within the university and were used to explore the predictive power of the UTAUT2 constructs including hedonic motivation, facilitating conditions, performance expectancy, effort expectancy, social influence, habit and behavioral intention. In addition to this, disciplinary differences along with discipline-specific needs were also considered in order to better understand adoption patterns. The results of this study indicated habit, hedonic motivation, facilitating conditions, and the …
What Makes A Good Leader? Ms Lili: Mississippi Library Leadership Institute, Anita L. Winger
What Makes A Good Leader? Ms Lili: Mississippi Library Leadership Institute, Anita L. Winger
Theses and Dissertations
What is leadership? The goal of this research is to develop leaders, but what does that mean? It is true that leadership is needed at every level in an organization, and a leader does not need to be at the administrative level of the organization but can lead from any role and any level in the organization. Everyone has their own style of leadership that needs to be developed. The research explored different styles and theories of leadership and focused on implementing a Character Strength-based framework of leadership. Through this research, identified topics will be presented to participants in the …
Barriers To Higher Education In Mississippi Prisons: A Systematic Literature Review And Policy Analysis, Ashley Elizabeth Weathers
Barriers To Higher Education In Mississippi Prisons: A Systematic Literature Review And Policy Analysis, Ashley Elizabeth Weathers
Theses and Dissertations
Higher education in prison reduces recidivism and improves reentry outcomes, yet Mississippi’s prison education programs remain underdeveloped due to financial constraints, policy challenges, and systemic barriers. While national research on prison education is expanding, Mississippi-specific policy evaluations remain limited. This capstone employs a desk-based research methodology, integrating a systematic literature review and policy analysis to examine these challenges. The study synthesizes recent research on the impact of prison education, funding limitations, and policy frameworks, addressing a critical gap in state-specific policy evaluation. The policy analysis evaluates Mississippi’s correctional education policies and funding mechanisms, using Southwest Mississippi Community College’s (SMCC) Prison …
Understanding Acceptance Capacity And Intentions Of Mississippians To Participate In The Conservation And Management Of Black Bears In Mississippi, Basant Pant
Theses and Dissertations
This dissertation explores the acceptance capacity of Mississippians towards black bears (Ursus Americanus), and their intentions to participate in their conservation and management. It intends to bridge the theory and application of wildlife acceptance capacity among three main objectives. First, a systematic literature review of journal articles employing the Search, Appraisal, Synthesis and Analysis (SALSA) method revealed the development phase of Wildlife Acceptance Capacity (WAC)-conceptual phase (1988 -2000) and applied phase (post 2000), highlighting the strong scholarly collaboration among high human development index (HDI) countries with limited collaboration with the low HDI countries. Second, a mail survey of 4,080 Mississippi …
Exploring The Impact Of Incorporating Artificial Intelligence Integrated Systems In The Workplace, Catherine Cruz Agosto Noda
Exploring The Impact Of Incorporating Artificial Intelligence Integrated Systems In The Workplace, Catherine Cruz Agosto Noda
Theses and Dissertations
This study focuses on assessing the impact of incorporating systems integrated with in the workplace by assessing the constructs of usability, cognitive load, and trust. The constructs are assessed by generation and experience level to determine which factors are relevant in a workplace setting. A workplace scenario was simulated by asking participants to complete tasks where they assumed the role of a warehouse manager assigned with assessing two scheduling systems – one with artificial intelligence and one without artificial intelligence. The participants were presented with three tasks of increasing difficulty for each prototype. Both quantitative and qualitative measures were used …
Bridging The Gap: Enhancing Novice Teacher Retention Through Logistical And Administrative Support, Denise Fleurette Harrel
Bridging The Gap: Enhancing Novice Teacher Retention Through Logistical And Administrative Support, Denise Fleurette Harrel
Theses and Dissertations
This project examines the challenges novice teachers encounter and how structured support systems impact their job satisfaction, effectiveness, and retention. The review focuses on administrative and logistical support, highlighting gaps between teacher preparation and classroom realities that contribute to high attrition (Falk, 2017; Koca, 2016). Key challenges include insufficient time management training, inconsistent expectations, and limited district or school-level support (Fantilli & McDougall, 2009), all of which are intensified by the demands of navigating modern classroom technologies (Philipsen et al., 2019). The literature review centers on teacher perceptions to clarify what constitutes effective logistical and administrative support (Banerjee et al., …
A Mixed-Method Study Of African American Parents’ Involvement In Their Children’S Individualized Education Program Process, Dischedia Tamarisi Williams
A Mixed-Method Study Of African American Parents’ Involvement In Their Children’S Individualized Education Program Process, Dischedia Tamarisi Williams
Theses and Dissertations
The major purpose of the study was to examine the unique experiences of African American parents regarding their parental involvement in their child’s Individualized Education Program process. In addition, the study aimed to investigate the perceptions of teachers and administrators regarding the experiences of the African American parents as they worked with the parents and their children during the IEP process. Epstein’s (1987, 2008) Model of Parental Involvement was used as a theoretical framework to underpin the study emphasizing six dimensions of parental involvement. The six dimensions of parental involvement include the following: parenting, communicating, volunteering, learning at home, decision-making, …
Optimizing Military Fighter Jet Selection: A Decision Analysis Approach For Nuclear-Capable Aircraft, Eni Kelechi Ofong
Optimizing Military Fighter Jet Selection: A Decision Analysis Approach For Nuclear-Capable Aircraft, Eni Kelechi Ofong
Theses and Dissertations
This research investigates the strategic decision-making process involved in selecting a nuclear-capable fighter aircraft for NATO (North Atlantic Treaty Organization) nations in Europe. In adaptation to the continuously changing technology landscape and the necessity for enhanced deterrence capabilities, this study evaluates three potential aircraft: the legacy Panavia Tornado (PA-200), the widely deployed F-16 Fighting Falcon (F-16), and the advanced F-35 Lightning II (F-35). Each platform presents distinct advantages and limitations regarding operational performance, mission adaptability, cost-effectiveness, and long-term sustainability. To systematically assess these alternatives, the study employs various decision analysis frameworks, including Multi-Criteria Decision Analysis (MCDA), single dimensional value function …
The Soil Greenhouse Gas Flux And Climate Mitigation Potential Of Conservation Reserve Program With Tree Planting In The Southeastern U. S., Jianing Liang
Theses and Dissertations
Afforestation is increasingly promoted as a nature-based solution to climate change, although its net impact on soil greenhouse gas (GHG) emissions remains variable across forest types, prior land uses, and environmental conditions. This dissertation investigates the soil GHG flux (CO2, CH4, N2O) responses and dynamics of afforestation under the Conservation Reserve Program (CRP) in the southeastern United States, with a specific focus on broadleaf and conifer tree planting practices. Drawing from a combination of meta-analysis, machine learning, and field-based observations across 73 sites, this research provides an integrated assessment of afforestation’s climate mitigation potential. In Chapter II, a meta-analysis of …
Impacts Of Upgrading Gcc On The Srtuner Compiler Autotuning Algorithm, Jonathan D. Butterfield
Impacts Of Upgrading Gcc On The Srtuner Compiler Autotuning Algorithm, Jonathan D. Butterfield
Theses and Dissertations
An often-overlooked research gap is the applicability of research over time. The impact of updating the GNU Compiler Collection version was investigated for the SRTuner compiler optimization research. Versions 7 through 14 were tested using documented flags and recommended flag dependencies. Quality controls measured and enforced consistency across test runs and benchmarks. The performance of SRTuner was compared to a random control while the impact of enforcing flag dependencies was evaluated. The most influential flags were investigated by turning them off in isolation, but results were mixed. It was determined that enforcing flag dependencies resulted in improved performance, but the …
Equity By Design: A North Glenn High School Equitable Practices Policy Guide, Kelli Andrews Jarrett
Equity By Design: A North Glenn High School Equitable Practices Policy Guide, Kelli Andrews Jarrett
Theses and Dissertations
This capstone project addresses equity gaps in dual enrollment programs in Mississippi, with a focus on North Glenn High School, a pseudonym for a high-poverty rural school. While dual credit opportunities have expanded statewide, disparities remain for first-generation, low-income, and minority students. A significant barrier is Mississippi’s reliance on ACT benchmarks for eligibility, which disproportionately excludes marginalized groups. The study examines the potential of the Pre-ACT in grades 9 and 10 as an early diagnostic tool to identify readiness gaps and inform targeted interventions before students take the ACT. Grounded in Bronfenbrenner’s Ecological Systems Theory and the Dual Enrollment Equity …
Novel Experimental Techniques For Pressure Transients, Luliang Zhang
Novel Experimental Techniques For Pressure Transients, Luliang Zhang
Theses and Dissertations
This dissertation introduces novel experimental techniques for analyzing pressure transients, focusing on dynamic strain and pressure measurements to advance the understanding and application of Pulse Pressure Amplification in percussive devices. The research evaluates a high-speed linescan extensometer utilizing linescan Digital Image Correlation (DIC) on a Kolsky Bar to obtain strain data at high strain rates. This data is critical for accurate material characterization and simulations to model dynamic behavior. Additionally, a novel method for measuring dynamic pressure waves in pipe systems has been developed, enabling direct assessments of pressure amplification in devices such as tapered pipe systems. The findings contribute …