Digital Commons Network^™

Improving Spatial Resolution Of Time Reversal Focusing Using Arrays Of Acoustic Resonators, Adam David Kingsley

Theses and Dissertations

Using a near-field array of acoustic resonators, it is possible to modify a focused pressure field and enforce a spatial frequency corresponding to the resonator array spacing. This higher spatial frequency makes it possible to focus and image with a resolution that is better than if the focusing were in free space. This near-field effect is caused by the phase shifting properties of resonators and, specifically, the delayed phase found in waves with a temporal frequency lower than that of the resonators in the array. Using time reversal, arrays of resonators are explored and the subwavelength focusing is used to …

Focusing Of High-Amplitude Sound Waves Using The Time Reversal Process, Brian D. Patchett

Theses and Dissertations

Time reversal is a method often used to focus sound to a desired location, and works best in a reverberant environment. The effect of focus location within a reverberant environment is presented first, revealing that proximity to reflecting surfaces has a significant effect on the amplitude of the focus both experimentally and when using a modal summation model. These effects are a primary component to creating focus signals at high amplitudes. High-amplitude focusing experiments show that when multiple sources are used simultaneously to generate a focus, a peak amplitude pressure spike of 200 dB can be achieved in air. A …

Facies Architecture And Provenance Of The Highly Progradational, Fluvial Dominated Deltaic Depositional System Of The Cretaceous Nanushuk Formation On The North Slope Of Alaska, Sarah N. Naone

Theses and Dissertations

The Cretaceous Nanushuk Formation of northern Alaska records extremely rapid shoreline progradation across the Colville Basin during the Albian-Cenomanian epochs. Additionally, it records a period of tectonic realignment in the region, as the main sediment source began to transition from the Chukotkan orogeny to the west to a more local sediment source of the proximal Brooks Range to the south. Through detailed outcrop characterization and 3-D modeling of three exposed outcrops along the axial trend of the Colville Basin on the North Slope and the Upper section of the Nanushuk, this study clarifies the relative timing of the early Brookian …

Methods For Engineers To Understand, Predict, And Influence The Social Impacts Of Engineered Products, Phillip Douglas Stevenson

Theses and Dissertations

Engineered products can impact the day-to-day life of their users and other stakeholders. These impacts are often referred to as the product's social impacts. Products have been known to impact the people who use them, design them, manufacture them, distribute them, and the communities where they exist. Currently, there are few methods that can help an engineer identify, quantify, predict, or improve a product's social impact. Some companies and organizations have tried to identify their impacts and, for example, set goals for achieving more sustainable business practices. However, engineers, in large part, do not have methods that can help improve …

Full Issue

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

No abstract provided.

The Desert Libraries Of Timbuktu

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

The Library of Congress and the Smithsonian Institution have opened an exhibit titled “Ancient Manuscripts from the Desert Libraries of Timbuktu,” the famous trading town at the edge of the Sahara Desert in Mali. The manuscripts include Qur’anic teachings, mathematics, physics, medicine, and astronomy.

Institute Researchers Share Findings At Lds Apologetics Conference

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

Three Institute researchers were among the speakers at the fifth annual FAIR conference, held August 7–8 at Utah Valley State College, in Orem, Utah. Founded in 1997, the Foundation for Apologetic Information and Research is a nonprofit
corporation dedicated to providing sound information and research that support the doctrine, beliefs, and practices of the Church of Jesus Christ of Latter-day Saints, particularly on matters that are challenged by unbelievers.

Methods For Single-Cell And Low-Input Proteomics, Yiran Liang

Theses and Dissertations

Single-Cell Proteomics (SCP) can provide unique insights into biological processes by resolving heterogeneity that is obscured by bulk measurements. Gains in the overall sensitivity and proteome coverage through improvements in sample processing and analysis increase the information content obtained from each cell, particularly for less abundant proteins. In addition to achieving in-depth proteome coverage from single cells, higher throughput measurements enable large-scale and statistically significant features within single cell populations. This dissertation focuses on method development to improve the sensitivity and throughput of SCP based on the nanoPOTS (nanodroplet Processing in One pot for Trace Samples) platform. The methods discussed …

Feedback As Boundary Object: Intersections Of Writing, Response, And Research, Lindsey Harding, Joshua King, Anya Bonanno, Joseph Powell

Journal of Response to Writing

While a great deal is known about instructor response to student writing—from commenting practices to student perceptions—less is known about how feedback impacts students’ writing and writerly development. While we set out to study students’ explicit engagement with written instructor feedback, our initial experimental design was disrupted by the COVID-19 pandemic. Accordingly, we describe the dialogic collaborative process that emerged as we considered both the data we were able to collect and, in turn, feedback anew. This article proposes that feedback on student writing is a boundary object which affords those interacting with it the opportunity for collaboration despite the …

Character First: Defining And Methodizing Character Depth, Jeff Mason

Criterion: A Journal of Literary Criticism

This paper explores the definition of "depth" in characters and provides a radical new definition, supplemented by an applicable model. By looking into significant literary theory, contemporary works of story, and even elements of mathematics, this paper advances our understanding of characters and how they create meaning in stories.

The Applicability Of Joint Source-Channel Coding Systems To Aeronautical Mobile Telemetry Data, Jesse Richmond

Theses and Dissertations

Broadcast spectrum restrictions require greater efficiency from wireless transmission systems, particularly in applications where sections of spectrum previously reserved for military purposes have been sold to private interests. A joint source-channel coding system, in tandem with smart data selection techniques, is proposed as a potential solution to this problem. The workings of this joint source-channel coding system are detailed, with particular attention given to the decoding process.

Hybrid Machine Learning And Physics-Based Modeling Approaches For Process Control And Optimization, Junho Park

Theses and Dissertations

Transformer neural networks have made a significant impact on natural language processing. The Transformer network self-attention mechanism effectively addresses the vanishing gradient problem that limits a network learning capability, especially when the time series gets longer or the size of the network gets deeper. This dissertation examines the usage of the Transformer model for time-series forecasting and customizes it for a simultaneous multistep-ahead prediction model in a surrogate model predictive control (MPC) application. The proposed method demonstrates enhanced control performance and computation efficiency compared to the Long-short term memory (LSTM)-based MPC and one-step-ahead prediction model structures for both LSTM and …

Biblical Hebrew As A Negative Concord Language, J. Bradley Dukes

Theses and Dissertations

The typological distinction between negative concord and double negation languages has received increasing attention over the past century beginning with Jespersen (1922). Multiple negation in Biblical Hebrew has been subject to mixed treatment in this regard. Some scholars have treated all multiple negation in Biblical Hebrew as emphatic (Gesenius, Kautzsch & Cowley 1910; Dahood 1975; Holmstedt 2016) while others have labeled these constructions as pleonastic (Jouon & Muraoka 2006). Snyman (2004) determines that Biblical Hebrew is neither a negative concord language nor a double negation language based upon his assessment that "BH does not exhibit multiple negation elements." In this …

Reservoir Computing Solutions For Streamflow Modeling And Prediction In Real World Scenarios, Paden Allsup

Undergraduate Honors Theses

With severe drought continuing in the western United States and the effects of climate change becoming more apparent across the world, it is becoming increasingly important to be able to predict the impact of extreme weather events like storms, droughts, and fires on streamflow dynamics. This includes flow regime as well as biogeochemical behavior of river systems and their watersheds. This project explores the use of Echo State Networks (ESN), a subset of Reservoir Computing, on modeling and predicting streamflow variability with a focus on biogeochemical patterns. In this project ESNs are tested and compared in the hope of creating …

Mindful Musicians: Trait Mindfulness, Deliberate Practice, Anxiety And Depression In College Musicians, Sally S. Wynn

Undergraduate Honors Theses

Background. Mindfulness is understood as a capacity to cultivate moment-to-moment awareness with a sense of nonjudgement, curiosity, and kindness. Anxiety and depression are prevalent in the undergraduate musician population, despite positive effects on mental health that are often associated with listening to music. This study explored factors of music practice including instrument category, practice time, and the use of deliberate practice techniques. Our objective was to test the relationships between dispositional mindfulness, musicianship, and mental health among college instrumental musicians. I hypothesized first, that dispositional mindfulness would be positively associated with musicianship; second, that mindfulness would be negatively associated with …

Evaluating Multi-Agent Modeller Representations, Jonathan Demke

Theses and Dissertations

The way a multi-agent modeller represents an agent not only affects its ability to reason about agents but also the interpretability of its representation space as well as its efficacy on future downstream tasks. We utilize and repurpose metrics from the field of representation learning to specifically analyze and compare multi-agent modellers that build real-valued vector representations of the agents they model. By generating two datasets and analyzing the representations of multiple LSTM- or transformer-based modellers with various embedding sizes, we demonstrate that representation metrics provide a more complete and nuanced picture of a modeller's representation space than an analysis …

Machine Learning With Gradient-Based Optimization Of Nuclear Waste Vitrification With Uncertainties And Constraints, Lagrande Gunnell, Kyle Manwaring, Xiaonan Lu, Jacob Reynolds, John Vienna, John Hedengren

Faculty Publications

Gekko is an optimization suite in Python that solves optimization problems involving mixed-integer, nonlinear, and differential equations. The purpose of this study is to integrate common Machine Learning (ML) algorithms such as Gaussian Process Regression (GPR), support vector regression (SVR), and artificial neural network (ANN) models into Gekko to solve data based optimization problems. Uncertainty quantification (UQ) is used alongside ML for better decision making. These methods include ensemble methods, model-specific methods, conformal predictions, and the delta method. An optimization problem involving nuclear waste vitrification is presented to demonstrate the benefit of ML in this field. ML models are compared …

Improving Student Success In A Large-Enrollment Introductory Accounting Course, Melissa P. Larson

Theses and Dissertations

This dissertation follows a three-article format presentation. The topic addresses improving student success in a large enrollment introductory accounting course. The first article is a literature review of pre-class activities within a flipped classroom setting in higher education. The review of 34 articles identified as relevant to the literature review explored what the literature tells us about pre-class learning activities and synthesized what instructors can do to design pre-class activities that encourage students' preparation for class. The review showed the importance of pre-class learning in a flipped classroom and that more research is needed to better understand students' behaviors and …

Meshless Large Eddy Simulation Of Propeller-Wing Interactions With Reformulated Vortex Particle Method, Eduardo Alvarez, Andrew Ning

Faculty Publications

The vortex particle method (VPM) has gained popularity in recent years due to a growing need to predict complex aerodynamic interactions during preliminary design of electric multirotor aircraft. However, VPM is known to be numerically unstable when vortical structures break down close to the turbulent regime. In recent work, the VPM has been reformulated as a large eddy simulation (LES) in a scheme that is both meshless and numerically stable, without increasing its computational cost. In this study, we build upon this meshless LES scheme to create a solver for interactional aerodynamics. Rotor blades are introduced through an actuator line …

Techno-Economic Sensitivity Analysis For Combined Design And Operation Of A Small Modular Reactor Hybrid Energy System, Daniel Hill, Adam Martin, Nathanael Martin-Nelson, Charles Granger, Kody Powell, John Hedengren

Faculty Publications

With increasing grid-penetration of renewable energy resources and a rising need for carbon-free dispatchable power generation, nuclear-hybrid energy systems (NHES), consisting of small modular reactors, are an increasingly attractive option for maintaining grid stability. NHES can accomplish this with a minimal carbon footprint but there are significant uncertainties that are not fully understood. This work describes and demonstrates methods for analyzing the uncertainties of potential NHES designs, including uncertain design parameters and time series as well as variations in dispatch horizon length. The proposed methods are demonstrated on a sample system with 16 design parameters, 3 uncertain time series, and …

Jeal 175 Full Issue

Journal of East Asian Libraries

No abstract provided.

A Reflection On The Challenges And Collaborative Potential In Working With Buddhist Studies Materials In East Asian Librarianship, Matthew Hayes

Journal of East Asian Libraries

This article explores a set of shared challenges that tend to emerge for East Asian Librarians in working with Buddhist studies materials. It outlines how Buddhist linguistic conventions can give rise to an unpredictability in reference work, how its historical textual practices can complicate collections development, and how Buddhist temple archive management can make traditional approaches to research advising unreliable. It also proposes that these challenges provide distinct opportunities for collaboration across Chinese, Japanese, and Korean areas of bibliographic coverage. These challenges offer a chance for librarians to work together and develop a standard, field-wide toolset for working with these …

Full Issue

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

No abstract provided.

Review Responds To Distortions Of Dna Evidence, Mormon Origins

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

The latest issue of the FARMS Review (vol. 15, no. 2, 2003) responds in full measure to two works challenging the historicity of the Book of Mormon and the foundational events of the restored Church of Jesus Christ. The contributing scholars not only expose fatal flaws in the critics’ arguments and methods but also provide background information and perspectives that readers will find instructive. In addition, this issue of the Review evaluates several other recent publications in Mormon studies and includes a Book of Mormon bibliography for 2002.

Modified Transient Hot-Wire Needle Probe For Experimentally Measuring Thermal Conductivity Of Molten Salts, Brian N. Merritt

Theses and Dissertations

Molten salts are high-temperature heat transfer fluids intended for cooling and/or storage purposes in a variety of energy applications. The current work seeks to ultimately study the thermophysical properties of fluoride and chloride salts, which are commonly considered for use in advanced nuclear reactors. Thermophysical properties like thermal conductivity are fundamental to ensuring safe, efficient, and competitive designs for advanced commercial nuclear reactors. Measurement challenges with liquid salts such as electrical conduction, corrosion, convection, and thermal radiation have hindered traditional approaches in their attempts to accurately quantify these properties at high temperatures. Here, a needle probe is developed, which modifies …

Design And Evaluation Of Miniaturized Ion Trap Mass Analyzers Using Simulation, Radhya Weligama Gamage

Theses and Dissertations

Mass spectrometry is a technique that analyzes the chemical compositions of compounds based on the mass-to-charge ratio of their ionized constituents. Miniaturized ion trap mass spectrometry finds application in a wide range of fields where portable, rugged, and reliable analytical instruments are required. Ion traps of various designs have been introduced over the past decades, each with their own unique advantages and capabilities. However, the process of developing a novel miniaturized ion trap mass spectrometer continues to be fraught with challenges. This dissertation discusses simulation studies pertaining to the development of a novel dual ion trap, the simplified coaxial ion …

Asymmetry Of Gains And Losses In Human Decision-Making And Choice: Behavioral Correlates Of Loss Aversion, Money, Food, And The Menstrual Cycle, Marcia Mackley Ventura

Theses and Dissertations

The purpose of this research is to determine if loss aversion is replicable as an overt behavioral response to potential gains and losses in complex, recurring, uncertain, and risky choice with real gains and losses of money and food. Cognitive methods used to determine the effect of loss have primarily measured verbal response to hypothetical choice scenarios in which participants cognitively predict their behavior in a series of bets or situations involving imagined monetary gains and losses. Less has been done using behavioral methods that measure overt behavioral response to gains and losses of actual commodities. The present study uses …

Stemficohort1preinterviewdata, Rebecca L. Sansom, Bryn Stclair, Jamie Jensen, Richard West

ScholarsArchive Data

The science, technology, engineering, and mathematics faculty institute (STEMFI) is a National Science Foundation funded project designed to provide support, measurement, and training to BYU faculty developing their own student-centered curriculum.

This PDF file contains pre-institute participation interview data from the first cohort of faculty involved in the STEM faculty institute (2018).

Full Issue

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

No abstract provided.

Contributions Sought For Completion Of The Collected Works Of Hugh Nibley

Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship

The scholars and staff at the Maxwell Institute have energetically set the goal of finishing the Collected Works of Hugh Nibley within the next three years. March 27, 2010, will be the 100th anniversary of Hugh Nibley’s birthday, and we would like to have the approximately 20-volume set completed by that date. Under the direction of John W. Welch, general editor of the Collected Works of Hugh Nibley, various supplemental electronic releases and a series of conferences in 2010 focusing on the lasting legacies of Nibley’s scholar-ship are also planned.