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Articles 1381 - 1410 of 74065
Full-Text Articles in Entire DC Network
Kuleana Mākua: Native Hawaiian Parents' Exercise Of Agency In K-12 School Selection, Joseph Piikeha Kahaka`Ulamaikalaniki`Eki`E Hao
Kuleana Mākua: Native Hawaiian Parents' Exercise Of Agency In K-12 School Selection, Joseph Piikeha Kahaka`Ulamaikalaniki`Eki`E Hao
Theses and Dissertations
In this qualitative study the author investigates how Native Hawaiian parents on Hawai`i Island navigate educational choices for their children amidst a history of centralized, Western-dominated schooling and systemic cultural suppression. Grounded in Bandura’s Social Cognitive Theory (SCT), the research explores parent perceptions of different K–12 school types and the complex factors that drive their selection. Through semi-structured interviews and a card sort activity with sixteen Native Hawaiian parents (n = 16), the study confirms that parental choice is fundamentally an act of indigenous self-determination defined by Kuleana Mākua (parental responsibility, authority, and privilege). The findings reveal that parents’ choices …
An Analysis Of Ukrainians' Language Attitudes And Ideology: A Conflict-Catalyzed Language And Identity Shift, Kateryna Kravchenko
An Analysis Of Ukrainians' Language Attitudes And Ideology: A Conflict-Catalyzed Language And Identity Shift, Kateryna Kravchenko
Theses and Dissertations
On February 24, 2022, the Russian Federation invaded Ukraine. According to Vladimir Putin's speech, the main goal of the war was to protect the Russian-speaking population of the Donbas region in eastern Ukraine. Many Ukrainians indeed speak Russian on a daily basis, largely due to the long and complicated history between the two countries. Recently, there has been an increase in pro-Ukrainian ideologies (Kulyk 2016); however, as the full-scale invasion began, people started advocating for Ukrainian usage in all public domains, and many even vowed to never speak Russian again. Since then, there has been a profound change in language …
Enhancing Silicon Sampling In Large Language Models: Fine-Tuning Techniques Using Survey Data, Davis P. Forster
Enhancing Silicon Sampling In Large Language Models: Fine-Tuning Techniques Using Survey Data, Davis P. Forster
Theses and Dissertations
Large language models (LLMs) are increasingly used to simulate responses of human demographic groups, a task known as silicon sampling. This paper investigates whether supervised fine-tuning can improve algorithmic fidelity in such settings. We construct a dataset from the General Social Survey (GSS), converting demographic attributes into natural-language backstories and randomly selecting one attribute as a held-out target. Fine-tuning a LLaMA-3.1-70B model on this dataset yields significant improvements on two tasks: (1) imputing missing attributes at the individual level, and (2) reproducing response distributions for demographic slices, such as racial and age groups. Notably, these improvements are achieved with minimal …
Enfrentando El Patriarcado: La Voz, El Espacio Femenino Y Lo Sobrenatural En Mexican Gothic De Silvia Moreno-Garcia, Raquel Macias Del Valle
Enfrentando El Patriarcado: La Voz, El Espacio Femenino Y Lo Sobrenatural En Mexican Gothic De Silvia Moreno-Garcia, Raquel Macias Del Valle
Theses and Dissertations
This thesis explores the crossroads of gender, space, and the supernatural in Mexican Gothic (2020) by Silvia Moreno–Garcia, examining how the novel challenges patriarchal structures through its protagonist, Noemí Taboada. Utilizing feminist theory, spatial analysis, and studies on the supernatural, this research demonstrates how Moreno–Garcia constructs a narrative in which female expression and connection are central to reinstating the feminine self as a subject. The novel presents High Place, the ancestral mansion of the Doyle family, as a space that embodies patriarchal control. Drawing on Gastón Bachelard’s The Poetics of Space and Marc Olivier’s Household Horror, this study examines how …
Using Rhizobia Seed Coatings And Soil Amendments To Combat Herbicide Toxicity For Native Legume Establishment, Ryan Matthew Glover
Using Rhizobia Seed Coatings And Soil Amendments To Combat Herbicide Toxicity For Native Legume Establishment, Ryan Matthew Glover
Theses and Dissertations
Dryland ecosystems face widespread degradation from historical mismanagement, climate change, and invasive species proliferation. Although herbicides effectively control invasive annual weeds, they often suppress the establishment of desirable perennial species, limiting restoration success. Legumes enhanced with rhizobia inoculants offer a promising approach to overcome these challenges by facilitating nitrogen fixation, improving soil microbial communities, and potentially mitigating herbicide stress. We conducted paired greenhouse and field experiments to evaluate whether rhizobia seed coatings improve the establishment of three legume species Astragalus cicer (Cicer Milkvetch), Onobrychis viciifolia (Sainfoin), and Medicago sativa (Alfalfa), in soils treated with imazapic and glyphosate. In the greenhouse, …
Evaluating The Performance Of The Primary Heat Exchanger In A Sco2 Brayton Cycle While Firing Solid Fuels, Brian Jeffrey Schooff
Evaluating The Performance Of The Primary Heat Exchanger In A Sco2 Brayton Cycle While Firing Solid Fuels, Brian Jeffrey Schooff
Theses and Dissertations
The sCO2 closed-loop Brayton cycle is an alternative to the standard steam-Rankine cycle for generating electrical power from a heat source. The sCO2 Brayton cycle is advantageous because it can be more efficient, use less water, and have smaller turbomachinery than the steam-Rankine cycle. While there are several research groups advancing the technology necessary to utilize the sCO2 Brayton cycle on an industrial scale, none of these groups use solid fuel combustion as the heat source. A Brigham Young University-led project developed and tested a pilot-scale sCO2 Brayton cycle unit (1.6 MWth) using natural gas, pulverized coal, and pulverized biomass …
Targeting Pancreatic Cancer With Rapamycin-Loaded Gold Nanoparticles Conjugated To Egf Peptide: Studies On Cytotoxicity And Uptake Mechanisms Aided By Proteomic Analysis, Adeolu Oluremi
Theses and Dissertations
Pancreatic cancer remains one of the most lethal malignancies, with a five-year survival rate below 5%. While rapamycin (Rap) has demonstrated therapeutic potential, its clinical utility is hampered by systemic toxicity. To address this limitation, this study developed a targeted nanocarrier system using gold nanospheres (AuNPs) functionalized with the Epidermal Growth Factor Receptor (EGFR) peptide GE11 for the specific delivery of Rap to pancreatic cancer cells. It is to note that pancreatic cancer overexpresses EGFR. The AuNP–GE11–Rap conjugates were successfully synthesized and characterized using physico-chemical techniques, which confirmed peptide conjugation and drug loading. In vitro studies using PANC-1 cells demonstrated …
Enabling Constraints In Artmaking: Developing Creative Confidence Through Discarded Materials, Lydia Romney Stewart
Enabling Constraints In Artmaking: Developing Creative Confidence Through Discarded Materials, Lydia Romney Stewart
Theses and Dissertations
This design-based research thesis explores the possibility of fostering creative confidence in students and examines how a project-based curriculum can help them rediscover their artistic abilities. It investigates two guiding questions: How does working with repurposed materials shape students' artmaking, creative confidence and sense of ownership in their artwork? And, in what ways do enabling constraints serve as a catalyst for student engagement? As a teacher-researcher, I designed and implemented a quarter-long curriculum in which 21 junior high students were challenged to create a collaborative public art installation using only discarded materials. The methodology blended qualitative and quantitative data, including …
Cavitation On Superhydrophobic Propellers, John Tyson Danby
Cavitation On Superhydrophobic Propellers, John Tyson Danby
Theses and Dissertations
This thesis investigates the impact of superhydrophobic (SH) surface treatments on the cavitation behavior of small-scale marine propellers. Cavitation, the formation of vapor cavities in liquid due to local pressure reductions, can lead to efficiency losses, noise, and structural damage in marine propulsion systems. Although SH surfaces have shown promise in reducing drag and altering nucleation behavior in static or low-speed flow contexts, their effect on cavitation onset in rapidly rotating propellers remains underexplored. To address this, eight 1-inch aluminum propellers were tested, including variations in pitch, solidity, and blade number. Each design was produced in two versions: one treated …
Is Relationship Satisfaction A Personal Trait?, Alyssa Brown
Is Relationship Satisfaction A Personal Trait?, Alyssa Brown
Theses and Dissertations
We explored individual differences in relationship satisfaction. We hypothesized a stable proportion of relationship satisfaction would be explained by individual differences. In Study 1 (N = 1619), individual differences accounted for 41% of the variance in ratings for relationship satisfaction and 22% for ratings of dedication. In Study 2, we attempted to model this unique variance using a Correlated Traits Correlated Methods Confirmatory Factor Analysis approach, then predict it using established traits from previous literature. Although our initial model had to be revised, our final exploratory model suggested individual relationship satisfaction was multifaceted: both dependent upon relationship type and possessing …
Cyclic Testing Of Special Moment Frame Connections With Buckling-Restrained Fuse Plates, Jeremiah John Merrell
Cyclic Testing Of Special Moment Frame Connections With Buckling-Restrained Fuse Plates, Jeremiah John Merrell
Theses and Dissertations
This thesis presents the development and evaluation of a new special steel moment frame connection that employs replaceable buckling-restrained fuse plates that can enhance seismic performance and post-earthquake repairability. A total of eight unique specimens were tested on two series of beam-to-column subassemblies (W36 and W24) to investigate connection behavior under cyclic loading. The experiments examined the influence of fuse plate geometry, bolt configuration, and buckling-restraints on strength, ductility, and deformation capacity. Results indicated that the buckling-restraint washers and bolts were effective at preventing out-of-plane buckling. Specimen M1.5 was successful in meeting the AISC 341-22 qualifications requirements for special moment …
Validation Of A Mesh-Based Computational Fluid Dynamics Model, The Generataion Of Reference Wake Mixing Data, And A Preliminary Comparison To A Lagrangian Vortex Based Model, Justin Don Hawkins
Validation Of A Mesh-Based Computational Fluid Dynamics Model, The Generataion Of Reference Wake Mixing Data, And A Preliminary Comparison To A Lagrangian Vortex Based Model, Justin Don Hawkins
Theses and Dissertations
Three things are accomplished in this work. First, a verified wind turbine model is developed for both turbulent and non-turbulent flows. The verified model is created using AMR-Wind, a mesh-based CFD solver which uses an actuator line model to represent the turbine blades. Second, a database of turbine forces and wake data is compiled using the verified wake model. This data is collected for simulations of two turbines operating in close proximity to one another in various configurations. When the wake of one turbine interacts with another, wake mixing occurs. Wake mixing affects turbine performance and is important for predicting …
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 …
Rab32c Mediates Osmoregulation And Calcium Homeoastasis In Dictyostelium Discoideum, Ashley Esparza
Rab32c Mediates Osmoregulation And Calcium Homeoastasis In Dictyostelium Discoideum, Ashley Esparza
Theses and Dissertations
Vesicular trafficking is a fundamental process essential to cell viability and dictates roles in both cellular and tissue function in multicellular organisms. To further understand various vesicular trafficking processes, our lab focuses on the moderators of these processes, Rab GTPases, using the model organism Dictyostelium discoideum. This dissertation focuses explicitly on the uncharacterized protein Rab32C, a homolog of human Rab32. While several Rab family members have been well defined, the functionality of Rab32C remains poorly understood. This project investigated both the subcellular localization and functional role of Rab32C with biochemical, imaging, and molecular assays. Results from this study provide evidence …
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 …
Maritime Trade And Imperial Ambitions: Yemeni Politics And Trade In The Indian Ocean World (626/1228-858/1454), Beck Sjostedt
Maritime Trade And Imperial Ambitions: Yemeni Politics And Trade In The Indian Ocean World (626/1228-858/1454), Beck Sjostedt
Theses and Dissertations
This thesis explores the role of Yemen, particularly under the Rasūlid dynasty (626/1228-858/1454) in the medieval Indian Ocean trade. I argue that the Rasūlids attempted to create an “imperial maritime space” wherein Yemen would be the imperial core, and the western Indian Ocean and Red Sea the subjugated peripheries. While the Rasūlids managed to organize state power towards their imperial project via diplomacy, military and naval expansion, and a robust and efficient bureaucracy, they never fully realized their goal of creating a thalassocratic empire in the western Indian Ocean. Nonetheless, medieval Yemen played a significant role in the political, social, …
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 …
Achieving More Accurate And Interpretable Fraud Detection With Double Machine Learning, Jeremy Andrew Berry
Achieving More Accurate And Interpretable Fraud Detection With Double Machine Learning, Jeremy Andrew Berry
Theses and Dissertations
Fraud detection remains a critical challenge across industries such as insurance, healthcare, finance, and government. Global losses from fraud and financial crime are estimated in the trillions annually, including billions in healthcare and insurance fraud alone. While effective for prediction, traditional machine learning methods often lack causal interpretability and struggle to adapt to evolving fraud tactics. This dissertation investigates the application of Double Machine Learning (DML), an emerging causal inference technique, to enhance both the accuracy and interpretability of fraud analytics. The research compares DML against established causal inference approaches, leveraging a meta-learning framework to evaluate model performance on accuracy, …
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 …