Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Brigham Young University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1561 - 1590 of 11651

Full-Text Articles in Entire DC Network

Mindfulness And Observational Drawing, Corinne Christopherson Sonderegger Apr 2022

Mindfulness And Observational Drawing, Corinne Christopherson Sonderegger

Theses and Dissertations

Observational drawing has many benefits, yet it can be a difficult and frustrating curriculum for students and teachers alike. As I was teaching elementary and college art classes simultaneously, I noticed a significant discrepancy between my younger and older students. Students in my elementary art classes loved to draw and often expressed how excited they were to make art. However, students in my college art classes were more hesitant and self-conscious about drawing and did not believe they could progress artistically. Many of these students had abandoned drawing in elementary or middle school. This pattern evokes the U curve of …

Go to article

A Survey-Based Analysis On Adult Community Esl Learners: Perceptions Of Challenges, Online Learning, Resources, And Skills, Adriana Reeve Apr 2022

A Survey-Based Analysis On Adult Community Esl Learners: Perceptions Of Challenges, Online Learning, Resources, And Skills, Adriana Reeve

Theses and Dissertations

"One thing cannot be disputed: immigrants from all backgrounds and levels of cultural capital are drawn to noncredit ESL programs with high hopes of a brighter future and the attainment of the American dream" (Becker 2011). Adult ESL community learners are a fast-growing and diverse group of individuals. Previous studies demonstrate the many challenges this group faces in attending English classes (Tan, Nabb, Aagard, and Kim 2010; Tucker 2007) and the need for more online learning to better meet their needs (Eyring 2014; Reynard 2003). A survey was administered to 136 adult community ESL learners enrolled at the Provo, Utah …

Go to article

Defining And Evaluating Design Patterns To Increase "This Is Not A Game" (Tinag), Lucia A. Mata Apr 2022

Defining And Evaluating Design Patterns To Increase "This Is Not A Game" (Tinag), Lucia A. Mata

Theses and Dissertations

TINAG, which stands for This is Not a Game, can be defined as "the concept that there are pervasive games, often ARGs, that are designed to immerse players in such a way that they suspend their disbelief in a fictional narrative and act like the world they have entered is real during their play time" (Pohjola 2004). Many designers and educators want to create games that appear real, but they are unsure of how to accomplish this. Increasing TINAG allows designers to create more realistic games while taking advantage of the many benefits that TINAG experiences offer. The purpose of …

Go to article

Accurate Band Energies Of Metals With Quadratic Integration, Jeremy John Jorgensen Apr 2022

Accurate Band Energies Of Metals With Quadratic Integration, Jeremy John Jorgensen

Theses and Dissertations

Materials play an important role in society. Historically, and even at present, materials have been discovered by trial and error, and many of the most useful materials have been discovered by chance. The high-throughput approach aims to remove (as much as possible) chance and guesswork at the experimental level by filtering out materials candidates that are not predicted to exist. Many successes have been recorded. In the high-throughput approach to materials discovery, machined-learned models of materials are created from databases of theoretical materials. These databases are the result of millions of density-functional-theory (DFT) simulations. The size and accuracy of the …

Go to article

The Role Of Bacterial Genotype In The Persistence Of The Microbiota Of Drosophila Melanogaster, Sarah J. Gottfredson Apr 2022

The Role Of Bacterial Genotype In The Persistence Of The Microbiota Of Drosophila Melanogaster, Sarah J. Gottfredson

Theses and Dissertations

In this work we use the fruit fly Drosophila melanogaster as a model to identify bacterial genes that help bacteria to persist in their animal hosts. Early work on this model system established that dietary replenishment drives the composition of the D. melanogaster gut microbiota, and subsequent research has shown that some bacterial strains can colonize the fly for much longer than the flow of bulk diet through the gut. In this work we reveal that bacterial genes influence bacterial persistence by studying the correlation between bacterial genotype and persistence in the D. melanogaster gut microbiota. We performed an initial …

Go to article

How Failures Cascade In Software Systems, Barbara W. Chamberlin Apr 2022

How Failures Cascade In Software Systems, Barbara W. Chamberlin

Theses and Dissertations

Cascading failures involve a failure in one system component that triggers failures in successive system components, potentially leading to system wide failures. While frequently used fault tolerant techniques can reduce the severity and the frequency of such failures, they continue to occur in practice. To better understand how failures cascade, we have conducted a qualitative analysis of 55 cascading failures, described in 26 publicly available incident reports. Through this analysis we have identified 16 types of cascading mechanisms (organized into eight categories) that capture the nature of the system interactions that contribute to cascading failures. We also discuss three themes …

Go to article

Playable Case Study Content Management System, Mitchell Stevenson Cross Apr 2022

Playable Case Study Content Management System, Mitchell Stevenson Cross

Theses and Dissertations

Educational simulations can help mitigate the natural gap between traditional education styles and the current professional world. Researchers at BYU have developed an educational simulation solution called Playable Case Studies (PCSs). PCSs are simulations that expose the user to real world scenarios and problems within a pre-built environment. With rising demand and use of these educational simulations, there is a need for easy and inexpensive ways to develop these simulations or Playable Case Studies (PCSs). We propose a content management system (CMS) that is tied to a system that utilizes dynamic modules that make up these simulations. We present a …

Go to article

Parental Incarceration As A Predictor Of Legal Cynicism, Mackenzie Joy Heim Apr 2022

Parental Incarceration As A Predictor Of Legal Cynicism, Mackenzie Joy Heim

Theses and Dissertations

Researchers have established that legal cynicism is linked to violence, deviant behavior, and crime. In response to the potentially dangerous implications of a legally cynical society, research in recent years has attempted to identify experiences and conditions that play a role in the development of legal attitudes. Given that youths' familial and social conditions appear to be influential predictors, this study tests the relationship between parental incarceration and legal cynicism. Data from the Fragile Families and Child Wellbeing Study were used for this analysis. Results from three OLS regression models indicate that parental incarceration is not a significant predictor of …

Go to article

A Multidimensional Convolutional Bootstrapping Method For The Analysis Of Degradation Data, Jared M. Clark Apr 2022

A Multidimensional Convolutional Bootstrapping Method For The Analysis Of Degradation Data, Jared M. Clark

Theses and Dissertations

While Monte Carlo methods for bootstrapping are typically easy to implement, they can be quite time intensive. This work aims to extend an established convolutional method of bootstrapping to work when convolutions in two or more dimensions are required. The convolutional method relies on efficient computational tools rather than Monte Carlo simulation which can greatly reduce the computation time. The proposed method is particularly well suited for the analysis of degradation data when the data are not collected on time intervals of equal length. The convolutional bootstrapping method is typically much faster than the Monte Carlo bootstrap and can be …

Go to article

Biophysical Factors Control Invasive Grass Hot Spots In The Mojave Desert, Tanner Corless Smith Apr 2022

Biophysical Factors Control Invasive Grass Hot Spots In The Mojave Desert, Tanner Corless Smith

Theses and Dissertations

The social, economic, and ecological costs of plant invasions are vast, through their ability to alter ecosystem structure and function. Invasive annual grasses are a nuisance in the American Southwest through promotion of the grass-fire cycle. Annual grasses such as Bromus rubens, Bromus tectorum, Schismus barbatus, and Schismus arabicus have invaded the Mojave Desert and increased fire occurrence, thus it is important to identify and characterize the areas where persistent invasion has occurred and subsequently fire risk is increased by understanding the distribution of these invasive grasses. Previous plot and landscape-scale research has revealed anthropogenic and biophysical correlates with the …

Go to article

A New Approach For 3d Printed Microfluidic Device Design Based On Pre-Defined Components, Cassandra Ester Slaugh Apr 2022

A New Approach For 3d Printed Microfluidic Device Design Based On Pre-Defined Components, Cassandra Ester Slaugh

Theses and Dissertations

3D printing for microfluidic device fabrication has received considerable interest in recent years, in part driven by the potential to dramatically speed up device development by reducing device fabrication time to the minutes timescale. Moreover, in contrast to traditional cleanroom-based fabrication processes that require manual production and stacking of a limited number of layers, 3D printing allows full use of the 3D fabrication volume to lay out microfluidic elements with complex yet compact 3D geometries. The Nordin group has successfully developed multiple generations of high resolution printers and materials for microfluidic devices that achieve this vision. However, because of the …

Go to article

Inhibition Of Cell Adhesion And Actin Localization During Migration Upon Protective Antigen Mutant Ligand Binding To The Capillary Morphogenesis Gene 2, Sai Lun Lee Apr 2022

Inhibition Of Cell Adhesion And Actin Localization During Migration Upon Protective Antigen Mutant Ligand Binding To The Capillary Morphogenesis Gene 2, Sai Lun Lee

Theses and Dissertations

Capillary Morphogenesis Gene 2 protein (CMG2) is a type 1 transmembrane receptor known as the anthrax toxin receptor 2 (ANTXR2). While it is documented that the cell surface receptor CMG2 mediates anthrax toxin entry into the cell via endocytosis, the physiological role of CMG2 is not well understood. Others have suggested that CMG2 may have a role in mediating ECM homeostasis and angiogenesis. Additionally, both anthrax protective antigen (PA) and a furin protease-resistant mutant, PASSSR, inhibit corneal neovascularization in a mouse model, and interestingly PASSSR has a greater affinity to CMG2 receptor. PASSSRalso has a more potent antiangiogenic effect than …

Go to article

The Proposal For The Development Of A Minimal Viable Product (Mvp) Repository Website Containing Authentic Texts In Video Format For The Use Of Language Teachers In The Twenty-First Century, Rute Maria Baptista Apr 2022

The Proposal For The Development Of A Minimal Viable Product (Mvp) Repository Website Containing Authentic Texts In Video Format For The Use Of Language Teachers In The Twenty-First Century, Rute Maria Baptista

Theses and Dissertations

This thesis project proposed the building of a website as a repository of authentic texts in video format for teaching foreign or second languages. The project planned the building of a minimal viable product or MVP with authentic videos both in English and Spanish, organized by the ACTFL levels with particular attention to the Intermediate level. Data were collected from a survey of 42 respondents in the United States and 89 combined from Spain and Mexico. The responses collected suggest that there is a need for this MVP. Additionally, the data indicated which features were most wanted by these teachers. …

Go to article

Physical Place And Online Space: Permeability, Embodiment, And Gender In Two Online, Synchronous Critical Multicultural Teacher Education Courses, Elizabeth Finlayson Harris Apr 2022

Physical Place And Online Space: Permeability, Embodiment, And Gender In Two Online, Synchronous Critical Multicultural Teacher Education Courses, Elizabeth Finlayson Harris

Theses and Dissertations

This semester-long microethnography explores how the emotional geography in two online, synchronous critical multicultural education courses are shaped by online interactions and infrastructures as well as social frames. Using a microethnographic approach, video data, interviews, and open-ended questionnaires revealed patterns of interactions suggesting an online emotional geography characterized by a duality of physical place and online space. Key findings suggest that the levels of permeability in student and instructor's physical location influence how online participants gave or received emotion gifts and performances in online spaces. This study further supports emergent research suggesting gender frames as relevant in students' level of …

Go to article

“If I Could Do This, I Feel Anyone Could:” The Design And Evaluation Of A Two-Factor Authentication Manager, Garrett D. Smith Apr 2022

“If I Could Do This, I Feel Anyone Could:” The Design And Evaluation Of A Two-Factor Authentication Manager, Garrett D. Smith

Theses and Dissertations

Two-factor authentication (2FA) is a strong defense against account compromise. However, usability studies reveal challenges with 2FA setup. The process to manually setup and remove 2FA methods differs across websites. We present a system design for a 2FA manager to automatically setup and remove 2FA methods. Potential benefits are reduced time, fewer mistakes, consistent terminology, a single workflow for users to learn, and the ability to rapidly transition to a new 2FA method—e.g., when replacing a lost 2FA method. We create two proof-of-concept implementations of our design, one as a browser extension and one integrated as a feature in an …

Go to article

The Novel Protein Crystallization Chaperone Telsam Stabilizes Weak Crystal Contacts, Accelerates Crystallization Of Fused Target Proteins, And Solves The Crystallographic Phase Problem, Supeshala Dilrukshi Sarath Nawarathnage Apr 2022

The Novel Protein Crystallization Chaperone Telsam Stabilizes Weak Crystal Contacts, Accelerates Crystallization Of Fused Target Proteins, And Solves The Crystallographic Phase Problem, Supeshala Dilrukshi Sarath Nawarathnage

Theses and Dissertations

We studied the usefulness of genetic fusion to TELSAM polymers as an effective protein crystallization strategy. We observed novel properties in crystals of two TELSAM-target protein fusions. TELSAM as a crystallization chaperone shows rapid crystallization when it's fused to target proteins and possibly with a greater propensity. Some TELSAM-target fusions crystallized more rapidly than the same target protein alone. TELSAM-target proteins can be crystallized at relatively low protein concentrations such as 0.1 mg/mL. TELSAM requires no TELSAM polymers touching one another in the crystal lattice in order to form well-diffracting crystals. This lack of crystal contacts has not been observed …

Go to article

The Effects Of Various Inlet Distortion Profiles On Transonic Fan Performance, Andrew Michael Bedke Apr 2022

The Effects Of Various Inlet Distortion Profiles On Transonic Fan Performance, Andrew Michael Bedke

Theses and Dissertations

An increased understanding of how inlet flow distortion affects transonic fans enables improved fan design and performance prediction. Inlet distortion refers to non-uniformities in the incoming flow properties. Complex inlet ducts in high performance aircraft result in distorted flow at the fan inlet. In this thesis, two studies were performed using Unsteady Reynolds-Averaged Navier Stokes (URANS) simulations. The first study focused on understanding how the transition abruptness between the clean and distorted sector in the inlet Pt profile as well as the circumferential extent of the distorted sector affect distortion transfer and generation through a transonic fan. Simulations on two …

Go to article

Mechanisms For Improvement Of Key Mechanical Properties In Polymer Powder Bed Fusion Processes, Clinton Spencer Abbott Apr 2022

Mechanisms For Improvement Of Key Mechanical Properties In Polymer Powder Bed Fusion Processes, Clinton Spencer Abbott

Theses and Dissertations

The purpose of this work is to understand the reasons for varied mechanical properties among three polymer Powder Bed Fusion (PBF) Additive Manufacturing (AM) processes. Parts for this work were manufactured from Polyamide 12 (PA12) using the Laser Powder Bed Fusion (L-PBF), Multi-Jet Fusion (MJF), and the recently developed Large Area Projection Sintering (LAPS) processes. Previous works have shown that LAPS parts demonstrate significantly higher density, ductility, and toughness than parts from the L-PBF and MJF processes. A hot isostatic pressing (HIP) treatment was developed to reduce porosity in L-PBF and MJF parts and determine if increasing part density would …

Go to article

Using Connections To Make Predictions On Dynamic Networks, Rebecca Dorff Jones Apr 2022

Using Connections To Make Predictions On Dynamic Networks, Rebecca Dorff Jones

Theses and Dissertations

Networks are sets of objects that are connected in some way and appear abundantly in nature, sociology, and technology. For many centuries, network theory focused on static networks, which are networks that do not change. However, since all networks transform over time, static networks have limited applications. By comparison, dynamic networks model how connections between objects change over time. In this work, we will explore how connections in dynamic networks change and how we can leverage these changes to make predictions about future iterations of networks. We will do this by first considering the link prediction problem, using either Katz …

Go to article

Stabilizing Controlled Systems In The Presence Of Time-Delays, Isaac Becker Pardo Apr 2022

Stabilizing Controlled Systems In The Presence Of Time-Delays, Isaac Becker Pardo

Theses and Dissertations

A dynamical system's state evolves over time, and when the system stays near a particular state this state is known as a stable state of the system. Through control methods, dynamical systems can be manipulated such that virtually any state can be made stable. Although most real systems evolve continuously in time the application of digital control methods to these systems is inherently discrete. States are sampled (with sensors) and fed back into the system in discrete-time to determine the input needed to control the continuous system. Additionally, dynamical systems often experience time delays. Some examples of time delays are …

Go to article

Parental Perceptions Of Elementary Aged Children Learning To Code, David Daniel Apr 2022

Parental Perceptions Of Elementary Aged Children Learning To Code, David Daniel

Theses and Dissertations

Little research has been conducted to understand the role that parents play in children learning to code even though coding has become a necessary skill for students to successfully study STEM (Science, Technology, Engineering, Math) subjects. After identifying five factors that would influence parental perceptions, we developed a survey and administered it to parents of elementary aged children. We validated the survey using a confirmatory factor analysis and structural equation modeling. To be considered valid, factors needed to meet three of the following four fit statistics: RSMEA < 0.08, SRMR < 0.08, CFI > 0.9, TLI > 0.9. Items needed to have a factor loading > 0.3 with a …

Go to article

Systems Engineering Of The Global L-Band Observatory For Water Cycle Studies, James Nathan Smith Apr 2022

Systems Engineering Of The Global L-Band Observatory For Water Cycle Studies, James Nathan Smith

Theses and Dissertations

The Global L-band Observatory for Water Cycle Studies (GLOWS) is designed as a follow-on to the Soil Moisture Active Passive (SMAP) observatory launched in 2015. While GLOWS is essentially copying many aspects of the SMAP mission, a key change has been made in the antenna technology. SMAP uses a reflector antenna and to reduce mission costs GLOWS uses a metamaterial lens antenna. This type of antenna is less efficient, so it must be proven that GLOWS can achieve the same uncertainty levels in soil moisture measurements as SMAP. In this work, a unified framework for modeling and analyzing GLOWS' ability …

Go to article

Critical Incidents In Sustaining A Behavior Management Level System With Special Education Students In A Self-Contained School, Stephanie Johnson Apr 2022

Critical Incidents In Sustaining A Behavior Management Level System With Special Education Students In A Self-Contained School, Stephanie Johnson

Theses and Dissertations

Level systems provide systematic support for teachers and students who need additional behavior support. The purpose of this study was to evaluate the perspectives of faculty members from a self-contained school, for special education students with severe behavior needs, which has sustained the use of a school-wide, behavior management level system for nearly 30 years. A total of 11 faculty members were interviewed using the critical incident technique, a qualitative methodology used as an exploratory tool in early stages of research. Interviews detailed the observable behaviors and specific events, critical incidents, that helped or hindered the sustainability of their school's …

Go to article

Aiding Semantic Memory Creation With Navigational Context, Thomas Benjamin Lyle Wasden Apr 2022

Aiding Semantic Memory Creation With Navigational Context, Thomas Benjamin Lyle Wasden

Theses and Dissertations

While we have traditionally understood the hippocampus to be involved in memory and navigation, it also appears that it has a role in language processing, creation and prediction. An obvious explanation for this is that language is impossible if linguistic signs cannot be remembered and retrieved. Because linguistic signs are definitionally biologically neutral or arbitrary, we must use the brain's apparatus for learning and storing information from the external world to store and retrieve them. Although plausible, this explanation fails to take into account the hippocampus' role in navigation as a contributing element in the processing, storage and retrieval of …

Go to article

Computationally Assisted Nmr Crystallography: A Path To Unusually High-Resolution Crystal Structures, Luther Wang Apr 2022

Computationally Assisted Nmr Crystallography: A Path To Unusually High-Resolution Crystal Structures, Luther Wang

Theses and Dissertations

Crystallography has traditionally been studied by diffraction methods involving X ray or neutron radiation. These methods have some limitations, from requiring the substance under study to form single crystals to the limited ability of X rays to locate hydrogen atoms. While neutron radiation can characterize hydrogens, it is expensive, not readily available and has its own particular limits on resolution. It this dissertation, it is demonstrated that NMR is extraordinarily sensitive to atomic positions, with variations of mere tens of femtometers creating statistically distinguishable chemical shift changes. To date, no other means of measurement can detect structural changes at this …

Go to article

Reading Fluency Development And Science In A Fourth Grade Dual Language Immersion Classroom, Talia A. Casares Apr 2022

Reading Fluency Development And Science In A Fourth Grade Dual Language Immersion Classroom, Talia A. Casares

Theses and Dissertations

Students from dual language immersion (DLI) classrooms are required to learn the language through content. However, some students have not yet developed these abilities by the time they start fourth grade. Thus, to fully comprehend content such as science, students need stronger reading and writing abilities in the second language (L2). To help stakeholders have a better understanding on how to effectively help students throughout this process, this action research studied the effectiveness of integrating literacy with science and mobile assisted language learning (MALL). Findings showed that the integrations of literacy, science and MALL were effective with statistically significant results …

Go to article

How She Sleeps At Night, Alexandra Malouf Apr 2022

How She Sleeps At Night, Alexandra Malouf

Theses and Dissertations

How She Sleeps at Night is a collection of lyric poetry constellated around experiences of disability, trauma, and womanhood. A critical essay introduces the collection by elucidating the experiences and theoretical underpinnings that shaped the body of these poems. The introductory essay distills the principles that informed my cardinal poetic goals as I wrote: to create poems that can be read again and again over a lifetime, which connect with readers' common humanity, and which acknowledge the nuances and complexities of being alive.

Go to article

Development Of Compact Phased Array Receivers On Rfsoc Prototyping Platforms, Jacob Bartschi Apr 2022

Development Of Compact Phased Array Receivers On Rfsoc Prototyping Platforms, Jacob Bartschi

Theses and Dissertations

The continual increase of wireless technologies in the world has motivated the use of phased arrays to mitigate radio frequency interference (RFI). There are many methods of performing beamforming for RFI rejection, but they are traditionally physically large and complicated solutions. Phased arrays need to be shrunk and made cheaper for them to see widespread use. This work presents several compact phased array receivers for different applications. The first part of this thesis presents a software GPS processor for a digital beamforming GPS receiver. The receiver is small enough to be flown on drones and enables GPS signals to be …

Go to article

Effects Of Optical Configuration And Sampling Efficiency On The Response Of Low-Cost Optical Particle Counters, Brady Scott Hales Apr 2022

Effects Of Optical Configuration And Sampling Efficiency On The Response Of Low-Cost Optical Particle Counters, Brady Scott Hales

Theses and Dissertations

Hazards associated with air pollution motivate the search for technologies capable of monitoring individual exposure to gaseous pollutants and particulate matter (PM). A Low-cost Optical Particle Counter (OPC), costing less than 50 USD, is an example of such technologies. Currently, OPCs are widely used to measure the concentration of particle matter in ambient air. While these low-cost air quality sensors are widely available, the accuracy and precision of these devices is highly uncertain. Consequently, the purpose of this thesis is to present an analytical model of two generic, low-cost OPCs based on the Laws of Conservation of Mass, Momentum, and …

Go to article

Gradient-Based Wind Farm Layout Optimization, Jared Joseph Thomas Apr 2022

Gradient-Based Wind Farm Layout Optimization, Jared Joseph Thomas

Theses and Dissertations

As wind energy technology continues to mature, farm sizes grow and wind farm layout design becomes more difficult, in part due to the number of design variables and constraints. Wind farm layout optimization is typically approached using gradient-free methods because of the highly multi-modal shape of the wind farm layout design space. Gradient-free method performance generally degrades with increasing problem size, making it difficult to find optimal layouts for larger wind farms. However, gradient-based optimization methods can effectively and efficiently solve large-scale problems with many variables and constraints. To pave the way for effective and efficient wind farm layout optimization …

Go to article

First Prev Next Last