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Evaluating The Impact Of Math Self-Efficacy, Math Self-Concept, And Gender On Stem Enrollment And Retention In Postsecondary Education, Marcia Bingham Jun 2023

Evaluating The Impact Of Math Self-Efficacy, Math Self-Concept, And Gender On Stem Enrollment And Retention In Postsecondary Education, Marcia Bingham

Theses and Dissertations

Low enrollment and high attrition of women in science, technology, engineering, and mathematics (STEM) continues to be an issue for postsecondary institutions. Improvements in representation of women has been seen in some of the agricultural and biological sciences; however, in many of the more math intensive areas such as geosciences, engineering, mathematics/computer science, and physical sciences (GEMP), women continue to be underrepresented leading to underrepresentation in the workforce and further exacerbating gender gaps. Studies suggest the lack of representation is not due to a gap in math ability between men and women, yet underrepresentation remains predominantly within math intensive STEM …

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Context Dependence Of Non-Covalent Interactions Among Amino-Acid Side Chains Along The Solvent-Exposed Surface Of Coiled Coils, Kimberlee Larsen Stern Jun 2023

Context Dependence Of Non-Covalent Interactions Among Amino-Acid Side Chains Along The Solvent-Exposed Surface Of Coiled Coils, Kimberlee Larsen Stern

Theses and Dissertations

Coiled coils are a well-known protein structure prevalent in eukaryotic function, synthetic applications, and de novo protein design. Coiled-coil folding is often described using heptad repeat positions labeled abcdefg where a and d positions occupy the interface between the coils, e and g positions flank the interface, and the b, c, and f positions face the solvent-exposed surface. The a, d, e, and g positions have been extensively studied in the coiled-coil literature. There is a lack of investigation on the impact of the b, c, and f positions on coiled-coil folding. Chapter 1 is an introduction to the heptad …

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Refill Friction Stir Fastener Repair In Aa7050-T7451, Andrew John Curtis Jun 2023

Refill Friction Stir Fastener Repair In Aa7050-T7451, Andrew John Curtis

Theses and Dissertations

The majority of Refill Friction Stir Spot Welding (RFSSW) is used to join two materials together oriented in a lap joint configuration. In this study, RFSSW was investigated and tested using an unconventional configuration setup, a hole/plug insertion approach. RFSSW was tested as a means of repairing a cracked rivet hole due to excessive use conditions. This was done by inserting a plug into a hole and using the RFSSW process to bond the plug to the base material. Machine and tool limits were investigated to determine if a refilled plug repair was possible and if complete mixing between plug/hole …

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Cesium Voltilization In Lif-Bef2: Predicting Release In The Event Of Fhr Fuel Failure, Johnny Hedrick Williams Jun 2023

Cesium Voltilization In Lif-Bef2: Predicting Release In The Event Of Fhr Fuel Failure, Johnny Hedrick Williams

Theses and Dissertations

This work demonstrates how ICP-MS can be employed to evaluate cesium volatilization from LiF-BeF2 (Flibe) salt with ab initio molecular dynamics studies used as corroborating data to better understand cesium behavior. Using mixtures of Flibe with 2 mol% CsF, it was found that cesium was stable within the salt melt at temperatures between 500-650°C over a time span of 8 hours. At 800°C, cesium vaporized from the salt at a rate of 0.83% / hr with a mass flux of 0.0023 g Cs / cm2hr. The atomistic modeling results show poor solvation of Cs at 500°C and 800°C, with stability …

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Securing Wireless Communication Via Information-Theoretic Approaches: Innovative Schemes And Code Design Techniques, Morteza Shoushtari Jun 2023

Securing Wireless Communication Via Information-Theoretic Approaches: Innovative Schemes And Code Design Techniques, Morteza Shoushtari

Theses and Dissertations

Historically, wireless communication security solutions have heavily relied on computational methods, such as cryptographic algorithms implemented in the upper layers of the network stack. Although these methods have been effective, they may not always be sufficient to address all security threats. An alternative approach for achieving secure communication is the physical layer security approach, which utilizes the physical properties of the communication channel through appropriate coding and signal processing. The goal of this Ph.D. dissertation is to leverage the foundations of information-theoretic security to develop innovative and secure schemes, as well as code design techniques, that can enhance security and …

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Design & Development Project Report: Chem-105 Oer Textbook, Abigail Boekweg Jun 2023

Design & Development Project Report: Chem-105 Oer Textbook, Abigail Boekweg

Instructional Psychology and Technology Graduate Student Projects

A report on a project to design and develop an open textbook for the BYU course CHEM-105 General College Chemistry. The project had two primary goals: to streamline the organization of the textbook and to enhance students' access to it.

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Use Of Highway Infrastructure By Bats: A Literature Review And Survey Of The Trans-Pecos Region Of Texas, Holly G. Wilson, Stirling J. Robertson, Richard D. Stevens Jun 2023

Use Of Highway Infrastructure By Bats: A Literature Review And Survey Of The Trans-Pecos Region Of Texas, Holly G. Wilson, Stirling J. Robertson, Richard D. Stevens

Western North American Naturalist

Bats are important components of nature and provide both monetary and nonmonetary benefits to mankind. While anthropogenic effects on wildlife and their habitats are typically viewed as negative, highway infrastructure might benefit numerous species of plants and animals, bats in particular. Cracks, crevices, and grooves within structures provide places for bats to roost. Here we review the literature on this topic as well as describe results of our own survey of bridges and culverts in the Trans-Pecos of Texas. We surveyed 204 bridges and 768 culverts between 2018 and 2019. We observed 7 species of bats using bridges or culverts …

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Evaluating Parameter Uncertainty In Transportation Demand Models, Natalie Mae Gray Jun 2023

Evaluating Parameter Uncertainty In Transportation Demand Models, Natalie Mae Gray

Theses and Dissertations

The inherent uncertainty in travel forecasting models -- arising from errors in input data, parameter estimation, or model formulation -- is receiving increasing attention from the scholarly and practicing community. In this research, we investigate the variance in forecasted traffic volumes resulting from varying the mode and destination choice parameters in an advanced trip-based travel demand model. Using Latin hypercube sampling to construct several hundred combinations of parameters across the plausible parameter space, we introduce substantial changes to mode and destination choice logsums and probabilities. However, the aggregate effects of of these changes on forecasted traffic volumes is small, with …

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Evaluating Effects Of Urban Growth Within The Greater Salt Lake Area On Local Meteorological Conditions Using Urban Canopy Modeling, Corey L. Smithson Jun 2023

Evaluating Effects Of Urban Growth Within The Greater Salt Lake Area On Local Meteorological Conditions Using Urban Canopy Modeling, Corey L. Smithson

Theses and Dissertations

The increasing urbanization of the greater Salt Lake City area (GSLA) has contributed to the development of an urban canopy over this area. This canopy refers to the effects of building profiles, varying land surface properties and anthropogenic heating on local meteorological conditions including temperature, humidity, and wind velocity. Urban Canopy Models (UCMs) can be used to represent these characteristics on a mesoscale without needing to develop models accounting for effects of individual buildings. One method used to classify urban areas are Local Climate Zones (LCZs), which assign different properties to different types of urban areas. A baseline model that …

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Predictive Modeling The Impact Of Engineered Products In Dynamic Sociotechnical Systems: An Agent-Based Approach, Christopher S. Mabey Jun 2023

Predictive Modeling The Impact Of Engineered Products In Dynamic Sociotechnical Systems: An Agent-Based Approach, Christopher S. Mabey

Theses and Dissertations

The impact of engineered products is a topic of increasing concern in society. The impact of a product can fall into the categories of economic, environmental, or social impact; the last category is defined as the effect of a product on the daily lives of people. Design teams lack sufficient tools to help improve the impact of products and understand the impact of products at scale in society. This dissertation aims to provide insight and methods for improving the social, environmental, and economic impact of engineered products. The majority of the research focuses on the prediction of product impacts on …

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The Impact Of Growth Mindset Training On Entrepreneurial Action Among Necessity Entrepreneurs: Evidence From A Randomized Control Trial, Shad Morris, W. Chad Carlos, Geoffrey Kistruck, Robert Lount, Tumsify Elly Thomas Jun 2023

The Impact Of Growth Mindset Training On Entrepreneurial Action Among Necessity Entrepreneurs: Evidence From A Randomized Control Trial, Shad Morris, W. Chad Carlos, Geoffrey Kistruck, Robert Lount, Tumsify Elly Thomas

Faculty Publications

Although entrepreneurship training programs are designed to help necessity entrepreneurs acquire skills and capabilities to take entrepreneurial action, participants in these programs often fail to do so. In partnership with a local government agency, we conducted a randomized field experiment involving 165 entrepreneurs in rural Tanzania where in addition to providing technical-skills training, approximately half of the participants also received ‘growth mindset’ psychological training. Those who received the growth mindset training displayed more entrepreneurial action in their business than those in the control group. Importantly, higher levels of entrepreneurial self efficacy mediated the positive impact on entrepreneurial action displayed by …

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Design Of A Transparent Cryogenic Silicon Carbide Probe Card With Tungsten Probe Tips, Ryan Beazer Jun 2023

Design Of A Transparent Cryogenic Silicon Carbide Probe Card With Tungsten Probe Tips, Ryan Beazer

Theses and Dissertations

DoD EO/IR applications continue to push imaging technology. Next generation advances require new material systems, novel device structures, as well as the improvement and development of read out integrated circuits. The common methodology used to assess devices and materials is to process test chip structures and focal plane arrays. Test chips have advantages over focal plane arrays; such as, variable area and stand alone devices and can be measured as a function of bias and temperature; however, focal plane arrays are the heart of the imager, but are measured through the read out integrated circuits, which can add complexity to …

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Bringing The Analysis Of Electrodeposition Signals In Voltammetry Out Of The Shadows, Devin Rappleye, Ranon G. Fuller Jun 2023

Bringing The Analysis Of Electrodeposition Signals In Voltammetry Out Of The Shadows, Devin Rappleye, Ranon G. Fuller

Faculty Publications

Voltammetry studies of electrodeposition are growing rapidly. Yet, relations for the analysis of electrodeposition reactions in voltammetry remain relatively obscure in the literature. The existing cyclic and square wave voltammetry relations for electrodeposition and their limitations are discussed to increase awareness. A retrospective analysis is performed to demonstrate the impact of model selection in improving the analysis of electrodeposition behavior with voltammetric data. A repository for voltammetry models of electrodeposition is proposed to further increase familiarity and application of the most appropriate models, which would support a rapidly growing area of research and technological development.

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Can Community Resilience Be Achieved? An Investigation Of Subjective Household Resilience, Place Meanings, And Individual Perceived Preparedness To Respond To Environmental Threats, Anh Minh Ly Jun 2023

Can Community Resilience Be Achieved? An Investigation Of Subjective Household Resilience, Place Meanings, And Individual Perceived Preparedness To Respond To Environmental Threats, Anh Minh Ly

Theses and Dissertations

This study examines the effects of place meanings and perceived individual preparedness on subjective household resilience and socio-psychological community resilience. Earlier research has shown an active controversy of whether place meanings and individual preparedness could transform into the perception of household resilience and community resilience. Thus, while place meanings, in a transformative norm, perform like place attachment and may support adaptation to change and strengthen the perception of resilience, it can present in forms of place dependence or inflexibility which might be a barrier for household and community resilience. Similarly, individual preparedness is claimed to be essential but insufficient to …

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The Enduring Influence Of Emerson's Ideas On American Management Literature From The Lens Of Dale Carnegie’S How To Win Friends And Influence People, Taylor M. Dalton Jun 2023

The Enduring Influence Of Emerson's Ideas On American Management Literature From The Lens Of Dale Carnegie’S How To Win Friends And Influence People, Taylor M. Dalton

Undergraduate Honors Theses

This thesis considers how the essays of Ralph Waldo Emerson may be seen as an important precursor to Dale Carnegie’s How to Win Friends and Influence People. Through a side-by-side analysis of four key topics—creativity, intention, action, and the idea of a non-hierarchal society—it becomes clear that the independent and creative mindset envisioned by Emerson in essays like “Self-Reliance” and “The American Scholar” finds a full and practical expression in the pages of Carnegie’s famous book. A close reading of these texts will reveal how Carnegie’s application of the philosophical ideas put forth by Emerson served as the foundation …

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Women, Divorce, Tobacco, And Outplacements Of Children: Uncovering Family Secrets In Switzerland, Tito Craige Jun 2023

Women, Divorce, Tobacco, And Outplacements Of Children: Uncovering Family Secrets In Switzerland, Tito Craige

Swiss American Historical Society Review

From early in the nineteenth century until the 1950s, tens of thousands of Swiss children were taken from their homes and placed with foster families or sold at auction. The mothers of the outplaced children were usually poor and divorced; some were alleged to be prostitutes. One of these mothers was the author’s great-grandmother, Dorothea Hürlimann. In 1895, because she was divorced and managed a tobacco store in Geneva’s red-light district, her three children were sent to live with foster families. The middle child, Dora, was four years old when she was placed with a family in Winterthur and began …

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A Corpus-Based Analysis Of Vvodnye Slova: Pedagogical Applications, Joan F. Chevalier Jun 2023

A Corpus-Based Analysis Of Vvodnye Slova: Pedagogical Applications, Joan F. Chevalier

Russian Language Journal

Parenthetical expressions referred to as vvodnye slova in Russian have remained on the periphery of Russian linguistics. This is, no doubt, due to the fact that they are heterogeneous and difficult to define as a category. Traditional and more recent approaches to vvodnye slova are discussed. Vvodnye slova play a key role in expressing authorial stance and in organizing and providing cohesion to texts. On the basis of these two main functional characteristics, an argument is made for the inclusion of vvodnye slova in Russian Language L2 curricula. This corpus-based study establishes frequency patterns for semantic sub-groups of vvodnye slova …

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Book Review: Maurice-Ernest Gillioz (1877-1962): Great Builder In America, Yves Bordet Jun 2023

Book Review: Maurice-Ernest Gillioz (1877-1962): Great Builder In America, Yves Bordet

Swiss American Historical Society Review

Maurice-Ernest Gillioz is a good example of the American dream. The son of a Swiss emigrant from the Canton of Valais who arrived in New York in the middle of the American Civil War, Gillioz started from nothing and built one of the largest public works companies in the Midwest in the first half of the twentieth century. Philippe Pierroz’ book is 164 pages, written in French, of richly illustrated and strongly documented material. The numerous illustrations and appendices can be easily understood by English-speaking readers.

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User Guide For Urban Canopy Modeling In Wrf. Version 1.0, Corey L. Smithson, Natalie J. White, Hans R. Klomp, Eric C. Monson, Bradley R. Adams Jun 2023

User Guide For Urban Canopy Modeling In Wrf. Version 1.0, Corey L. Smithson, Natalie J. White, Hans R. Klomp, Eric C. Monson, Bradley R. Adams

Faculty Publications

Researchers at Brigham Young University (BYU) have developed this guide for running a WRF simulation using a single layer urban canopy model (UCM). This was developed specifically for the Greater Salt Lake Area but is adaptable to other urban areas. This guide includes information on running WRF simulations to study theoretical urban growth scenarios.

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Vortex Particle Method For Electric Ducted Fan In Non-Axisymmetric Flow, Eduardo Alvarez, Cibin Joseph, Andrew Ning Jun 2023

Vortex Particle Method For Electric Ducted Fan In Non-Axisymmetric Flow, Eduardo Alvarez, Cibin Joseph, Andrew Ning

Faculty Publications

The vortex particle method has been reformulated in recent work as a large eddy simulation (LES) in a scheme that is both meshless and numerically stable, solving long-standing issues of numerical stability. In this study, we build upon this meshless LES scheme to create a simulation framework for electric ducted fans. This poses the challenge of introducing solid boundaries in the vorticity form of the Navier-Stokes equations without a mesh. Rotor blades are introduced in our computational domain through an actuator line model (ALM) following well-established practices for LES. A novel, vorticity-based, actuator surface model (ASM) is developed for the …

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Nonsolvent-Induced Phase Separation Inside Liquid Droplets, Rami Alhasan, Tanner A. Wilcoxson, Dakota S. Banks, Sion Jung, Douglas R. Tree Jun 2023

Nonsolvent-Induced Phase Separation Inside Liquid Droplets, Rami Alhasan, Tanner A. Wilcoxson, Dakota S. Banks, Sion Jung, Douglas R. Tree

Faculty Publications

Nonsolvent-induced phase separation (NIPS) is a popular method for creating polymeric particles with internal microstructure, but many fundamental questions remain surrounding the kinetics of the complex coupled mass transfer and phase separation processes. In this work, we use simulations of a phase-field model to examine how (i) finite domain boundaries of a polymer droplet and (ii) solvent/nonsolvent miscibility affect the NIPS process. To isolate the effects of phase separation kinetics and solvent/nonsolvent mass transfer on the NIPS process, we study two different cases. First, we investigate droplet concentrations that originate inside the two-phase region, where phase separation kinetics alone governs …

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How Female Bipoc Students At A Predominantly White Institution Think About Belonging: A Multiperspective Study, Delirio Juarez May 2023

How Female Bipoc Students At A Predominantly White Institution Think About Belonging: A Multiperspective Study, Delirio Juarez

Theses and Dissertations

Black, Indigenous, and People of Color (BIPOC) students at predominantly White institutions (PWIs) report decreased sense of belonging compared to White students (Hunn, 2014; Hurtado & Carter, 1997; Museus et al., 2018; Strayhorn, 2019). The study aimed to answer, "What are the daily lived experiences of BIPOC students at a PWI?" and "How do BIPOC students at a PWI describe feelings of belonging (if at all)?" The study was conducted at a private, religiously affiliated, PWI, in the Western United States. The University Belonging Questionnaire (Slaten et al., 2018) was used to sort students' feelings of belonging. Female participants who …

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Recommending Answers To Math Questions Using Kl-Divergence And The Approximate Xml Tree Matching Approach, Siqi Gao May 2023

Recommending Answers To Math Questions Using Kl-Divergence And The Approximate Xml Tree Matching Approach, Siqi Gao

Theses and Dissertations

Mathematics is the science and study of quality, structure, space, and change. It seeks out patterns, formulates new conjectures, and establishes the truth by rigorous deduction from appropriately chosen axioms and definitions. The study of mathematics makes a person better at solving problems. It gives someone skills that (s)he can use across other subjects and apply in many different job roles. In the modern world, builders use mathematics every day to do their work, since construction workers add, subtract, divide, multiply, and work with fractions. It is obvious that mathematics is a major contributor to many areas of study. For …

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Copus Profiles Paper Data, Jamie Jensen, Rebecca L. Sansom, Jennifer B. Nielson, Richard E. West, Geoffrey Wright, Bryn St. Clair May 2023

Copus Profiles Paper Data, Jamie Jensen, Rebecca L. Sansom, Jennifer B. Nielson, Richard E. West, Geoffrey Wright, Bryn St. Clair

ScholarsArchive Data

COPUS profile data, interview transcripts

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Hierarchical, Porous Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth Lloyd, Rami Alhasan, Sujata Dhakal, Svetlana Morozova, Douglas R. Tree, Robert Hickey May 2023

Hierarchical, Porous Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth Lloyd, Rami Alhasan, Sujata Dhakal, Svetlana Morozova, Douglas R. Tree, Robert Hickey

Faculty Publications

While hierarchical ordering is a distinctive feature of natural tissues and is directly responsible for their diverse and unique properties, research efforts to synthesize biomaterials have primarily focused on using molecular-based approaches without considering multiscale structure. Here, we report a bottom-up self-assembly process to produce highly porous hydrogels that resemble natural tissues both structurally and mechanically. Randomly oriented, physically crosslinked nanostructured micelles form the walls of aligned, polymer-rich pore walls that surround water-rich cavities. Extremely soft elastic modulus (<  1 kPa), highly stretchability (greater than 12-times), strain-hardening, and completely reversible deformation result from the hierarchical structure. Independent control of nano and macroscales is realized through the combination of polymer macromolecular parameters and processing conditions, directly impacting the resulting phase behavior. Here, we demonstrate precise control of the material structure and structure orientation over many orders of magnitude (e.g., nm – µm), and reveal how the multiscale structure directly impacts mechanical properties.

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Morphogenetic Engineering Of Synthetic Protocell Systems, Qinyu Zhu May 2023

Morphogenetic Engineering Of Synthetic Protocell Systems, Qinyu Zhu

Theses and Dissertations

Observing and studying how life forms behave, i.e., their movement, adaptability, and so on, have enabled human beings to develop new technologies or optimize existing ones. One of the more noticeable phenomena in Nature is morphogenesis. Morphogenetic processes exist in different stages of biological development, from cellular division to tissue and organ formation. It is easy to observe shape development during mophogenesis due to emerging imaging techniques. However, it is hard to understand this process due to its complex organization, and the morphogenetic responses can be induced by a variety of chemicals or mechanical stresses and are subject to the …

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Design And Performance Of A Laboratory Scale Pressurized Oxy-Coal Reactor, Scott Gardner, Cody Carpenter, Jacob Tuia, Aaron Skousen, Dustin Badger, Sandra Thomas, Bradley R. Adams, Dale R. Tree, Andrew R. Fry May 2023

Design And Performance Of A Laboratory Scale Pressurized Oxy-Coal Reactor, Scott Gardner, Cody Carpenter, Jacob Tuia, Aaron Skousen, Dustin Badger, Sandra Thomas, Bradley R. Adams, Dale R. Tree, Andrew R. Fry

Faculty Publications

A pressurized oxy-coal (POC) reactor has been designed, built and tested to investigate key technologies related to oxy-coal combustion including a dry coal feed system, an oxy-coal burner, and a slagging ash management system. The coal feed system utilized a fluidized bed to convey pulverized coal with CO2 from a coal bed into the reactor. The reactor has diagnostic capabilities including optical access, embedded thermocouples, fuel and gas flow rates, exhaust gas analysis (CO2, CO, NO, O2) and heat flux. At 13.6 atm and a firing rate of 89 kWth a mean feed rate of 12.5 kg/h was …

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Methods For Designing Compact And Deployable Origami-Inspired Flat-Foldable Spacecraft Antennas And Other Systems, Collin Ryan Ynchausti May 2023

Methods For Designing Compact And Deployable Origami-Inspired Flat-Foldable Spacecraft Antennas And Other Systems, Collin Ryan Ynchausti

Theses and Dissertations

There are times when it is desirable for devices to be stowed compactly, ``transported'' to the location of their desired use, and then deployed to another stable shape or configuration to perform their designed function. Origami-based mechanisms are beneficial in these cases due to their compact, folded nature and large deployments. Unlike traditional mechanical design, compliant mechanism and origami-based design approaches inherently have coupled characteristics, creating complex design problems. The research presented here discusses metrics, methods, and designs to aid in the design of origami-adapted and compliant mechanisms, focusing on the design case of deployable space systems. First, the hexagonal …

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Algorithmic Fidelity And The Use Of Large Language Models In Social Science Research, Christopher Michael Rytting May 2023

Algorithmic Fidelity And The Use Of Large Language Models In Social Science Research, Christopher Michael Rytting

Theses and Dissertations

In this dissertation, we argue that large language models (LLMs) exhibit a considerable amount of \textit{algorithmic fidelity}, a property where they have modeled ideas, behaviors, and attitudes of the population who generated their training data. This has important implications for social science, as this fidelity theoretically allows for the use of LLMs as effective proxies for human beings in experiments and research. We demonstrate this empirically in various social science domains (political partisanship, demographic surveying, voting behavior, hot-button policy issues, news media, populism, congressional summaries), in various applications (replicating social science survey findings, assisting in coding of text datasets, inferring …

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Developing Genotypic And Phenotypic Systems For Early Analysis Of Drug-Resistant Bacteria, Yesman Akuoko May 2023

Developing Genotypic And Phenotypic Systems For Early Analysis Of Drug-Resistant Bacteria, Yesman Akuoko

Theses and Dissertations

Antimicrobial resistance in bacteria is a global health challenge with a projected fallout of 10 million deaths annually and cumulative costs of over 1 trillion dollars by 2050. The currently available tools exploited in the detection of bacteria or their DNA can be expensive, time inefficient, or lack multiplex capabilities among others. The research work highlighted in this dissertation advances techniques employed in the phenotypic or genotypic detection of bacteria and their DNA. In this dissertation, I present polymethyl methacrylate-pressure sensitive adhesive microfluidic platforms developed using a time-efficient, inexpensive fabrication technique. Microfluidic devices were then equipped with functionalized monoliths and …

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