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Temperature Relaxation And Magnetically Suppressed Expansion In Strongly Coupled Ultracold Neutral Plasmas, Robert Tucker Sprenkle Dec 2021

Temperature Relaxation And Magnetically Suppressed Expansion In Strongly Coupled Ultracold Neutral Plasmas, Robert Tucker Sprenkle

Theses and Dissertations

Ultracold neutral plasmas provide a platform for studying transport properties in an idealized environment. In this dissertation, transport properties in a Ca$^+$/Yb$^+$ dual species ultracold neutral plasma and a Ca$^+$ magnetized ultracold neutral plasma are studied. In dual species plasmas, we study ion-ion temperature relaxation. We compare measured relaxation rates with atomistic simulations and a range of popular theories. Our work validates the assumptions and capabilities of molecular dynamic simulations and invalidates theoretical models in this regime. This work illustrates an approach for precision determinations of detailed material properties in Coulomb mixtures across a wide range of conditions. We also …

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A Visually Realistic Simulator For Autonomous Evtol Aircraft, Seth M. Nielsen Dec 2021

A Visually Realistic Simulator For Autonomous Evtol Aircraft, Seth M. Nielsen

Theses and Dissertations

Electrically powered vertical takeoff and landing (eVTOL) aircraft could provide a new mode of air transportation of people and cargo that is low-cost, on-demand, and able to reach more areas than is possible with current technology. They have the unique ability to takeoff and land in congested spaces yet efficiently travel long distances which makes them a promising technology for applications such as rapid medical assistance, automated package delivery, or human transportation. This type of aircraft has only recently become a possibility, owing to advancements in battery technology, computing power, and sensor technologies, and thus support for eVTOLs is lacking …

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Laser Forming Of Compliant Mechanisms And Flat-Foldable Furniture, Daniel Calvin Ames Dec 2021

Laser Forming Of Compliant Mechanisms And Flat-Foldable Furniture, Daniel Calvin Ames

Theses and Dissertations

Compliant mechanisms are useful for improving existing machines and creating new ones that were not previously possible. They also help us to think of new methods and technologies needed to both improve existing systems as well as manufacture systems that have not been done before. The purpose of this thesis is to show novel implementations of compliant mechanisms into folding systems, and to show new methods for fabricating such mechanisms with nontraditional materials and on difficult scales. Folding systems are shown in furniture applications with chairs, stools, and childcare furniture applications as results of research into how such structures could …

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Development And Characterization Of An Underwater Acoustics Laboratory Via In Situ Impedance Boundary Measurements, Cameron Taylor Vongsawad Dec 2021

Development And Characterization Of An Underwater Acoustics Laboratory Via In Situ Impedance Boundary Measurements, Cameron Taylor Vongsawad

Theses and Dissertations

Modeling underwater acoustic propagation comes with a variety of challenges due to the need for proper characterization of the environmental conditions. These conditions include ever changing and complex water properties as well as boundary conditions. The BYU underwater acoustics open-air tank test-bed and measurement chain were developed to study underwater acoustic propagation within a controlled environment. It was also developed to provide ways to test and validate ocean models without the high cost associated with obtaining open ocean measurements. However, tank measurements require additional characterization of boundary conditions associated with the walls of the tank which would not be present …

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Bayesian, Frequentist, And Information Geometry Approaches To Parametric Uncertainty Quantification Of Classical Empirical Interatomic Potentials, Yonatan Kurniawan Dec 2021

Bayesian, Frequentist, And Information Geometry Approaches To Parametric Uncertainty Quantification Of Classical Empirical Interatomic Potentials, Yonatan Kurniawan

Theses and Dissertations

Uncertainty quantification (UQ) is an increasingly important part of materials modeling. In this paper, we consider the problem of quantifying parametric uncertainty in classical empirical interatomic potentials (IPs). Previous work based on local sensitivity analysis using the Fisher Information has shown that IPs are sloppy, i.e., are insensitive to coordinated changes of many parameter combinations. We confirm these results and further explore the non-local statistics in the context of sloppy model analysis using both Bayesian (MCMC) and Frequentist (profile likelihood) methods. We interface these tools with the Knowledgebase of Interatomic Models (OpenKIM) and study three models based on the Lennard-Jones, …

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The Last Nephite Scribes, Noel B. Reynolds Dec 2021

The Last Nephite Scribes, Noel B. Reynolds

Faculty Publications

This paper leverages the insights of modern scholars on the scribal schools of the ancient near east to identify and track the Nephite scribal school across the ten centuries of the Nephite dispensation. Mormon tells us his abridgment only includes a hundredth part of the Nephite history available to him on the Large Plates of Nephi. That being the case, it is especially impressive that his abridgment tracks the responsibility for maintaining and preserving the Nephite record and other sacred objects—the responsibility of the scribes—across that millennium without gaps. Mormon and his son Moroni were themselves trained scribes who could …

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An Analysis Of Two Photometric Redshift Methods And Their Uses For Finding Void Galaxies, Rochelle J. Steele Dec 2021

An Analysis Of Two Photometric Redshift Methods And Their Uses For Finding Void Galaxies, Rochelle J. Steele

Theses and Dissertations

An extensive survey of extragalactic objects with accurate distances is difficult to perform. Distance at that scale is commonly found with redshift and most easily identified with spectroscopic observations, which are time intensive. This is especially a concern when surveying for the elusive, possibly non-existent dwarf galaxies in the centers of voids, whose light would be so faint that a spectroscopic survey to find them would be unreasonably time consuming. Photometric methods to calculate redshift could provide a much quicker way to find distance, but the photometric methods used thus far are characterized by large errors that make them unusable …

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Ghost Personal Experience Narratives, Jaclyn Malmrose Dec 2021

Ghost Personal Experience Narratives, Jaclyn Malmrose

Final Projects

About Personal Experience Narratives on ghosts as told by members of the Church of Jesus Christ of Latter-day Saints

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Identifying And Knocking Out Non-Visual Opsins In The Optic Tectum Of Zebrafish Larvae, Sarah Jarrett Dec 2021

Identifying And Knocking Out Non-Visual Opsins In The Optic Tectum Of Zebrafish Larvae, Sarah Jarrett

Undergraduate Honors Theses

Deep brain photoreceptors (DBPs) are non-visual photoreceptors found in the brains of non-mammalian vertebrates like zebrafish. While using optogenetic techniques in our lab to photo-activate the ear (by expressing the light-gated channel: channelrhodopsin) in efforts of identifying optic tectum (OT) neurons that respond to and integrate auditory and visual stimuli, we found that violet light was able to elicit OT neuronal activity. OT activity was also detected in cases when visual and auditory stimulation was not possible due to removal of the eyes and absence of the exogenously expressed channelrhodopsin, respectively. Analyzing OT single-cell sequencing data of 7day post fertilization …

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Prediction Equations To Determine Induced Force On Reinforcing Elements Due To Laterally Loaded Piles Behind Mse Wall And Lateral Load Test On Dense Sand, Pedro David Garcia Montesinos Dec 2021

Prediction Equations To Determine Induced Force On Reinforcing Elements Due To Laterally Loaded Piles Behind Mse Wall And Lateral Load Test On Dense Sand, Pedro David Garcia Montesinos

Theses and Dissertations

Researchers performed 35 full-scale lateral load tests on piles driven within the reinforcement zone of a mechanically stabilized earth wall (MSE wall). Data defining the induced tensile force on the reinforcements during lateral pile loading was used to develop multi-linear regression equations to predict the induced tensile force. Equations were developed by previous researchers that did not consider the diameter of the pile, the fixed head condition, relative compaction, or cyclic loading. The purpose of this research was to include this tensile force data and develop prediction equations that considered these variables. Additionally, a full-scale lateral load test was performed …

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Pentagonal Extensions Of The Rationals Ramified At A Single Prime, Pablo Miguel Rodriguez Dec 2021

Pentagonal Extensions Of The Rationals Ramified At A Single Prime, Pablo Miguel Rodriguez

Theses and Dissertations

In this thesis, we define a certain group of order 160, which we call a hyperpentagonal group, and we prove that every totally real D5-extension of the rationals ramified at only one prime is contained in a hyperpentagonal extension of the rationals. This generalizes a result of Doud and Childers (originally conjectured by Wong) that every totally real S3 extension of the rationals ramified at only one prime is contained in an S4 extension.

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What Is Literary? Teaching Diverse, Literary Young Adult Novels In The Secondary Classroom, Kathryn Taylor Dec 2021

What Is Literary? Teaching Diverse, Literary Young Adult Novels In The Secondary Classroom, Kathryn Taylor

Undergraduate Honors Theses

This thesis defines what makes a novel literary and examines the benefits of introducing Young Adult literature into the English curriculum. The current classical canon that is taught in secondary classrooms consists almost entirely of books written by white, Eurocentric men with a few token novels from women, authors of color, or queer authors. While the books in the classical canon have earned their place there, the rapidly changing demographics in our secondary schools mean that the majority of our students no longer share the same characteristics as these authors. They have largely different life experiences and struggle to connect …

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Advancing Cell-Free Protein Synthesis Systems For On-Demand Next-Generation Protein Therapeutics And Clinical Diagnostics, Emily Ann Long Zhao Dec 2021

Advancing Cell-Free Protein Synthesis Systems For On-Demand Next-Generation Protein Therapeutics And Clinical Diagnostics, Emily Ann Long Zhao

Theses and Dissertations

Recombinant proteins have many medical and industrial applications, but their use is complicated by commercial production and stability constraints. These issues are particularly challenging for recombinant proteins used in pharmaceutical therapeutics and clinical diagnostics. Expensive production and distribution limit the accessibility of therapeutics and diagnostics especially in the developing world. Additionally, clinical use of recombinant proteins face further challenges within biological systems including biological degradation and immunogenicity. To increase the accessibility of recombinant proteins, the cost and inefficiencies of protein manufacturing and distribution need to be significantly reduced. A powerful tool to aid in this endeavor is cell-free protein synthesis …

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Utilizing Isothermal Titration Calorimetry For Measuring Beta-Galactosidase Activity In Liquid Dairy Products, Eliza Anne Brock Dec 2021

Utilizing Isothermal Titration Calorimetry For Measuring Beta-Galactosidase Activity In Liquid Dairy Products, Eliza Anne Brock

Theses and Dissertations

This research explores Isothermal Titration Calorimetry as a method for measuring beta-galactosidase activity directly and continuously in milk, sweet whey, sweet whey permeate, acid whey, and acid whey permeate. Beta-galactosidase in various concentrations was injected into each of the liquid dairy products spiked with lactose to verify if the heat rate from the enzymatic reaction could be observed. In addition, a consistent concentration of beta-galactosidase was injected into various concentrations of lactose in the products, to observe the heat rates from the enzymatic reaction. There was exothermic activity that never returned to baseline demonstrated in milk, sweet whey, and sweet …

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Using Facies Analysis And Reservoir Characterization Of The Albian-Cenomanian Nanushuk Formation To Assist In Better Understanding Interactions Between Shoreface, Deltaic, And Fluvial Systems On The North Slope, Alaska, Andrea Smoot Dec 2021

Using Facies Analysis And Reservoir Characterization Of The Albian-Cenomanian Nanushuk Formation To Assist In Better Understanding Interactions Between Shoreface, Deltaic, And Fluvial Systems On The North Slope, Alaska, Andrea Smoot

Theses and Dissertations

The Albian-Cenomanian Nanushuk Formation located on the North Slope of Alaska is the result of fluvial, deltaic, and shoreface processes and has been the focus of recent petroleum exploration activity in the Colville Basin. The Nanushuk and underlying Torok formations together contain an estimated 8.7 billion barrels of oil and 25 trillion cubic feet of natural gas reserves within the resource-rich North Slope. The Nanushuk Formation is composed of sediment sourced from the Chukotka Peninsula to the west and deposited axially within the Colville Basin. High sedimentation rates led to rapid progradation of shoreface and deltaic systems, which effectively filled …

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Blended Language Learning: The Decision-Making Process In Designing A Blended Portuguese Course, Camellia Hill Dec 2021

Blended Language Learning: The Decision-Making Process In Designing A Blended Portuguese Course, Camellia Hill

Theses and Dissertations

This study identifies how content specialists, instructors, and instructional designers made decisions about what content to teach in person and what to teach online for a second year Portuguese university course. Qualitative vignettes around three course design participants highlight emergent themes and course artifacts from their interviews that show how they made decisions about what learning opportunities to do online and what to leave in person. The blended language course involved Canvas learning management system with two additional main technology tools used in development: GoReact and H5P. The results are subdivided to reflect the views of the instructional designer, the …

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Effects Of Catharanthine On Dopamine Release In The Nucleus Accumbens And Ethanol Consumption, Emily Baldwin Dec 2021

Effects Of Catharanthine On Dopamine Release In The Nucleus Accumbens And Ethanol Consumption, Emily Baldwin

Undergraduate Honors Theses

This thesis discusses the history of catharanthine and related compounds, and their potential anti-addictive properties. Current research is exploring possible mechanisms of these properties. Past studies have found catharanthine has effects on neurons that project to the mesocorticolimbic system, an area implicated in addiction. We have seen that catharanthine decreases evoked dopamine (DA) release but increases basal DA release. This is the first study to investigate catharanthine’s effect on DA transmission in vivo. Using microdialysis, we determined the effect of catharanthine on DA in the nucleus accumbens of the striatum. This study determines the effect of different doses of …

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Identifying And Evaluating Common Subgenres In Asymmetric Virtual Reality Games, Miah Dawes Dec 2021

Identifying And Evaluating Common Subgenres In Asymmetric Virtual Reality Games, Miah Dawes

Theses and Dissertations

Recent years have seen a significant growth in what designers and players call asymmetric virtual reality (AVR) games. This dissertation creates a framework that defines the relevant characteristics of AVR as a genre and describes five common genres of AVR games, including David(s) and Goliath, Hide and Seek, Perspective Puzzle, Order Simulation, and Lifeline. The core features of each subgenre are expounded. These subgenres are then evaluated using design workshops to observe novice game designs use these subgenres in their game design process. An analysis of the workshops found that the AVR subgenre framework may benefit novice game designers in …

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Female Puma (Puma Concolor) Highway Crossings In The Yucatan Peninsula, Carlos A. López González, Fernanda Cruz Torres, Mircea G. Hidalgo Mihart Dec 2021

Female Puma (Puma Concolor) Highway Crossings In The Yucatan Peninsula, Carlos A. López González, Fernanda Cruz Torres, Mircea G. Hidalgo Mihart

Western North American Naturalist

Human infrastructure, particularly highway infrastructure, has proven to be a hazard for the resilience of large felid populations throughout the world. The Yucatan Peninsula is no exception and is presently confronted with the establishment of the “Tren Maya,” a continental railway that will reshape the road network of the peninsula. We describe 12 successful crossings of a 4-lane highway on the peninsula by a female puma (Puma concolor) fitted with a GPS radio-transmitter. The median time between sequential locations was 24 h (range 8–56 h), and the average number of days between crossings was 4.33 (SD = 2.50). …

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Restricted Microbial Presence, Activity, And Community Structuring Within Dry Valley Soils Of Antarctica, Scott Fillerup George Dec 2021

Restricted Microbial Presence, Activity, And Community Structuring Within Dry Valley Soils Of Antarctica, Scott Fillerup George

Theses and Dissertations

The McMurdo Dry Valley region is the largest ice-free area of Antarctica. Harsh abiotic conditions of the polar desert ecosystem, including extreme cold, aridity, and limited nutrient availability select for unique taxa. The comparatively simple terrestrial ecosystem is well-suited for investigating edaphic influences on microbial presence, activity, and community structuring. The Dry Valleys are viewed as a useful analog for Mars astrobiology investigations. However, most biotic investigations have been focused on lower elevations, where an understanding of edaphic effects on microbial communities within its generally more favorable conditions has emerged. Transiently wetted Dry Valley water tracks may be analogous to …

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A Language Analysis Of The London, Harrow Obituary From 1940 To 1950, Michaela Rappleyea Dec 2021

A Language Analysis Of The London, Harrow Obituary From 1940 To 1950, Michaela Rappleyea

Undergraduate Honors Theses

This thesis is an analysis of the vocabulary and phrases used in obituaries written in London during World War II and in the first five years following the war. During the war, both the length and content of the obituaries was significantly different, as the subjects and manner of death during those years was also significantly different. During the post-war years, the subjects and content followed a lengthier format and were generally for older community members who died of natural causes. This change in structure was affected by the nature and frequency of death. The tone of the writing was …

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Exploring Differences Of Age And Gender On Perceived Experience Of Active Participation Cybersecurity Learning, James Lakko Dec 2021

Exploring Differences Of Age And Gender On Perceived Experience Of Active Participation Cybersecurity Learning, James Lakko

Undergraduate Honors Theses

Many organizations including the United States government have identified a shortage of cybersecurity professionals in the workforce. This thesis explores the effectiveness of escape room/simulation based learning in an active participation and immersive education to motivate pursuing cybersecurity. A survey was administered to the participants of the 2021 BYU Cybersecurity Camp regarding their experience in the Interactive Cybersecurity Experience (ICE). The ICE is a simulator/escape room that challenges participants to complete a Star Trek themed mission by overcoming cybersecurity obstacles. The three demographics that were surveyed included a camp for educators, a camp for boys, and a camp for girls. …

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Folk Ordinances: A Study Of Mission Stories Featuring The Casting Out Of Evil Spirits, Olivia Baird Dec 2021

Folk Ordinances: A Study Of Mission Stories Featuring The Casting Out Of Evil Spirits, Olivia Baird

Final Projects

About the folk beliefs and customs of Latter-day Saint exorcism. Includes interviews on LDS missionaries casting out evil spirits

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Mixture Design Response Surface Methodology Analysis Of Seven Natural Bioactive Compounds To Treat Prostate Cancer, Ian Geddes Berlin Dec 2021

Mixture Design Response Surface Methodology Analysis Of Seven Natural Bioactive Compounds To Treat Prostate Cancer, Ian Geddes Berlin

Theses and Dissertations

Natural bioactive compounds have drawn the interest of many researchers worldwide in their effort to find novel treatments, including prostate cancer (PC) treatment which is estimated to be 13.1% of all new cancer cases in the U.S. in 2021. Many of these bioactive compounds have been identified from treatments in traditional Chinese medicine (TCM), that often have multiple bioactive compounds present. However, in vitro studies frequently focus on the compounds in isolation, or in simple combinations of two compounds. We used mixture design response surface methodology (MDRSM) to assess changes in PC cell viability after 48 hours of treatment to …

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Age-Dependent Search Behavior In The Colorado Checkered Whiptail (Aspidoscelis Neotesselatus), Carina Kusaka, Kaera Utsumi, Catherine Staley, Rachael Pedersen, Julia Valdivia, Elizabeth Liu, Hannah Caracalas, Hannah Reynolds, Maria A. Eifler, Douglas A. Eifler Dec 2021

Age-Dependent Search Behavior In The Colorado Checkered Whiptail (Aspidoscelis Neotesselatus), Carina Kusaka, Kaera Utsumi, Catherine Staley, Rachael Pedersen, Julia Valdivia, Elizabeth Liu, Hannah Caracalas, Hannah Reynolds, Maria A. Eifler, Douglas A. Eifler

Western North American Naturalist

We compared movement and space use patterns of foraging adult and juvenile Colorado checkered whiptails (Aspidoscelis neotesselatus) in pinyon pine–juniper woodland. Through focal observations, we characterized (1) movement paths as a series of step lengths and turn angles at 30-s intervals, and (2) habitat use reflected by the proportion of time spent in different vegetation types and in the open. Adults and juveniles differed in both movement and habitat use. Adults spent more time in the open and in association with mountain mahogany (Cercocarpus montanus), while juveniles were more frequently found in association with dead wood, …

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Nesting Biology And Offspring Development Of The Cavity-Nesting Solitary Wasp Isodontia Elegans (F. Smith) From Trap-Nests In Oregon, Ronald C. Spendal, Kevin M. O'Neill, Casey M. Delphia Dec 2021

Nesting Biology And Offspring Development Of The Cavity-Nesting Solitary Wasp Isodontia Elegans (F. Smith) From Trap-Nests In Oregon, Ronald C. Spendal, Kevin M. O'Neill, Casey M. Delphia

Western North American Naturalist

We studied the nesting biology and developmental schedules of the cavity-nesting solitary wasp Isodontia elegans in Oregon, USA. Trap-nests contained 1–15 brood cells each, separated by partitions, which adult females made with grass fragments. Before leaving nests to hunt, females made loose, temporary closures of longer fragments of dried grass and, upon returning, briefly deposited prey just inside the nest entrance before transferring them to a cell. Cells were provisioned with katydids (Meconema thalassinum, an invasive species in North America) and tree crickets (Oecanthus fultoni), the latter predominating as summers progressed. The inner cells of nests, …

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Whooping Crane (Grus Americana) Family Consumes A Diversity Of Aquatic Vertebrates During Fall Migration Stopover At The Platte River, Nebraska, Andrew J. Caven, Keith D. Koupal, David M. Baasch, Emma M. Brinley Buckley, Jenna Malzahn, Michael L. Forsberg, Mariah Lundgren Dec 2021

Whooping Crane (Grus Americana) Family Consumes A Diversity Of Aquatic Vertebrates During Fall Migration Stopover At The Platte River, Nebraska, Andrew J. Caven, Keith D. Koupal, David M. Baasch, Emma M. Brinley Buckley, Jenna Malzahn, Michael L. Forsberg, Mariah Lundgren

Western North American Naturalist

The Aransas-Wood Buffalo population of Whooping Cranes (Grus americana) migrates approximately 4000 km through the central Great Plains biannually, between their breeding and wintering grounds. Whooping Cranes depend on stopover sites to provide secure resting locations and the caloric resources necessary to complete their migration, such as the USFWS-designated critical habitat area in the Central Platte River Valley (CPRV) of Nebraska. This area includes braided river habitat characterized by low-elevation and submerged sandbars, which provide important roosting and foraging opportunities for migrating Whooping Cranes. We used long-range photography, videography, and behavioral scan sampling to document forage items consumed …

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Front Matter, Vol. 81 No. 4 Dec 2021

Front Matter, Vol. 81 No. 4

Western North American Naturalist

No abstract provided.

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End Matter, Vol. 81 No. 4 Dec 2021

End Matter, Vol. 81 No. 4

Western North American Naturalist

No abstract provided.

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Characterization Of Bacteriophage Targeting Bacillus Licheniformis In Milk Processes And Thermal Stability Of Bacteriophage During Htst Pasteurization, Jeremy Robert Arbon Dec 2021

Characterization Of Bacteriophage Targeting Bacillus Licheniformis In Milk Processes And Thermal Stability Of Bacteriophage During Htst Pasteurization, Jeremy Robert Arbon

Theses and Dissertations

An array of Bacillus licheniformis strains were isolated from a commercial powdered milk process. Bacteriophages exhibiting activity against B. licheniformis were isolated from cattle manure and effluent samples destined for a lagoon at a dairy farm. After sequencing, 8 of the 10 phages were found to be novel and genetically differentiated. Transmission electron scanning microscopy (TSEM) was performed. All bacteriophages were of the family Herelleviridae with contractile tail sheaths ranging from 80µm to 150µm and, surprisingly, survived a common fluid milk processing treatment used to inactivate vegetative cells. The survival of the phage after high temperature short time pasteurization of …

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