Digital Commons Network^™

Design, Synthesis, And Characterization Of New Non-Centrosymmetric Organic Crystals For Terahertz Generation, Gabriel Alejandro Valdivia-Berroeta

Theses and Dissertations

Terahertz (THz) spectroscopy is an emerging technology with promising applications in imaging, homeland security, and material detection and quantification. Frequencies in the THz region can be generated by optical rectification of ultrafast near-infrared laser pulses in the presence of a nonlinear optical (NLO) materials such as organic crystals. Non-centrosymmetric organic THz generating crystals such as DAST, HMQ-TMS, and OH1 have received special attention due to the strong generated fields on the order of MV/cm. The cation of these organic salts is designed by connecting electron-donating with electron-accepting groups via a highly planar aromatic system. To improve the performance of organic …

Stability Of Mhd Shock Waves, Bryn Nicole Barker

Theses and Dissertations

This thesis focuses on the study of spectral stability of planar shock waves in 2-dimensional magnetohydrodynamics. We begin with a numerical approach, computing the Lopatinski determinant and Evans function with the goal of determining if there are parameters for which viscous waves are unstable and the corresponding inviscid waves are stable. We also begin developing a method to obtain an explicit, analytical representation of the Evans function. We demonstrate the capabilities of this method with compressible Navier-Stokes and extend our results to 2-D MHD. Finally, using compressible Navier-Stokes again, we derive an energy estimate as a first step in improving …

Bounds On Heat Transfer In The Presence Of Ekman Pumping, Benjamin Alexander Pachev

Theses and Dissertations

Rigorous bounds on heat transfer in rapidly rotating convection have existed for several years in the case of free-slip or stress-free boundary conditions. No-slip boundary conditions result in a phenomenon known as Ekman pumping, which significantly impacts the heat transport. A recent collaborative effort in which the author was involved significantly sharpened the bound on heat transfer in the presence of Ekman pumping. The resulting publication was targeted for an audience consisting primarily of physicists and other non-mathematicians. This work stems from the same effort, but is intended for a mathematical audience. Two additional, new results are presented that provide …

A Longitudinal Investigation Of The Effects Of A Kindergarten Multi-Tiered Oral Narrative Language Intervention On Later Literacy Outcomes, Tristin Carolyn Hampshire

Theses and Dissertations

The purpose of the current study was to examine the longitudinal effects of a multi-tiered narrative language intervention in at-risk students provided in kindergarten on fourth grade reading comprehension. The participants included 686 students from four school districts in the upper Midwest. Twenty-eight kindergarten classrooms were randomly assigned to a treatment or control condition resulting in 14 treatment classrooms and 14 control classrooms. Every student in the study participated in a pretest regarding oral narrative language skills. Students in the control group were considered to be at-risk, average performing, or advanced performing depending on their pretest score. Each student in …

Managing Two-Factor Authentication Setup Through Password Managers, Jonathan William Dutson

Theses and Dissertations

Two-factor authentication (2FA) provides online accounts with protection against remote account compromise. Despite the security benefits, adoption of 2FA has remained low, in part due to poor usability. We explore the possibility of improving the usability of the 2FA setup process by providing setup automation through password managers. We create a proof-of-concept KeePass (a popular password manager) extension that adds browser-based automation to the 2FA setup process and conduct a 30-participant within-subjects user study to measure user perceptions about the system. Our system is found to be significantly more usable than the current manual method of 2FA setup for multiple …

Growing Complex Networks For Better Learning Of Chaotic Dynamical Systems, David Joseph Passey Jr.

Theses and Dissertations

This thesis advances the theory of network specialization by characterizing the effect of network specialization on the eigenvectors of a network. We prove and provide explicit formulas for the eigenvectors of specialized graphs based on the eigenvectors of their parent graphs. The second portion of this thesis applies network specialization to learning problems. Our work focuses on training reservoir computers to mimic the Lorentz equations. We experiment with random graph, preferential attachment and small world topologies and demonstrate that the random removal of directed edges increases predictive capability of a reservoir topology. We then create a new network model by …

Reconsidering Essence, Christopher T. Althoff

Theses and Dissertations

The rhetorical core of adaptation studies is a comparison between two texts, and the type of comparison that has sparked the most reactions, whether in its use or in speaking out against it, is fidelity criticism. As David Johnson and Simone Murray point out, fidelity criticism has long been rejected as an unscholarly mode of interpretative analysis because it is caught up in subjective value judgments and imprecise conjectures of a text’s “essence.” I contend, however, that the understanding of essences is critical to understanding both fidelity and the adaptation experience because something like essence is fixed in the human …

Designing Game Design At Byu, Garrett Egan

Student Works

In this report, I document my design process and the resulting course for an introductory game design class designed for undergraduate students at BYU. Example materials from the course are included, along with the course structure and background analysis.

Teacher Recruitment: Predictive Factors Of Stem University Students Entering The Teaching Profession, Scott Harris

Student Works

This study examines factors that influence science, technology, engineering and math (STEM) university students’ willingness to consider teaching as a career. Although very few of these students initially consider this profession, we identified four factors using predictive modeling that are strongly associated with these students’ willingness to consider teaching and their belief that teaching might be their best career option. Results indicated that STEM university students were more likely to consider teaching when they believed teaching is something they would be good at, others encouraged them to be a teacher, when family encourages them to teach, and when teachers they …

Aerodynamic Measurement Stability During Rabbit Versus Pig Benchtop Phonation, Megan Caroline Hoggan

Theses and Dissertations

Combination corticosteroid inhalers are the primary treatment option for long-term pulmonary disorders including asthma, persistent bronchitis, and chronic obstructive pulmonary disease. Common side effects of these medications are xerostomia in the mouth and throat, hoarseness, and soreness in the oropharynx. Research indicates that a large percentage of the inhaler particles are deposited onto laryngeal tissue, leaving an alteration of laryngeal mucosal properties. As the first stage in a long-term project, this thesis addresses the need for baseline phonatory data that will lay groundwork for quantifying inhaler-induced phonatory changes. Excised larynx research is a powerful tool for assessing aerodynamic alterations that …

Space-Time Coding For The Advanced Range Telemetry Continuous Phase Modulation, Robert L. Leatham

Theses and Dissertations

Aeronautical telemetry systems that transmit the same signal through multiple antennas from the flight vehicle suffer from severe link dropouts when the signals destructively interfere one with another at receiver. The underlying issue is a transmit array with element spacing far greater than the wavelength producing a transmit antenna pattern with significant and deep nulls. Recently, space-time coding techniques have been proven to resolve the issue for systems using linear modulations and shaped-offset quadrature shift keying (SOQPSK) modulation, a non-linear continuous phase modulation (CPM). This thesis examines application of space-time coding techniques to resolve the self-interference issue for another CPM …

Isogeometric Shell Analysis: Multi-Patch Coupling And Overcoming Locking, Zhihui Zou

Theses and Dissertations

The fundamental advantages of applying Isogeometric Analysis (IGA) to shell analysis have been extensively demonstrated across a wide range of problems and formulations. However, a phenomenon called numerical locking is still a major challenge in IGA shell analysis, which can lead to dramatically deteriorated analysis accuracy. Additionally, for complex thin-walled structures, a simple and robust coupling technique is desired to sew together models composed of multiple patches. This dissertation focuses on addressing these challenges of IGA shell analysis. First, an isogeometric dual mortar method is developed for multi-patch coupling. This method is based on Be ?zier extraction and projection and …

From Systems To Services: Changing The Way We Conceptualize Itss -- A Theoretical Framework And Proof-Of-Concept, Brice R. Colby

Theses and Dissertations

This dissertation consists of two articles. The first article describes an architecture for intelligent tutoring that focuses on modularity. This new architecture is based on Gibbons' layers theory for instructional design (2014). Splitting up the architecture for an intelligent tutor into layers allows different pieces to age at different rates which, in turn, allows the intelligent tutor to be adapted to new research and design theories. This architecture supports building intelligent tutoring services, nimble programs that can be assembled together to replicate the functions of intelligent tutoring without the expertise needed to create the services. Alternative architectures support building intelligent …

Galectin-1: A Potential Protein Therapy For Limb-Girdle Muscular Dystrophy 2b, Mary L. Vallecillo, Matthew S. Teynor, Jonard C. Valdoz, Spencer D. Hayes, P. Daniel Poulson, Matthew F. Rathgeber, Sean R. Stowell, Pam M. Van Ry

Library/Life Sciences Undergraduate Poster Competition 2020

• Limb-Girdle Muscular Dystrophy 2B (LGMD2B) belongs to a group of diseases called dysferlinopathies, caused by mutations in the DYSF gene.
• Dysferlin is an important muscle membrane protein involved in repair and regeneration after injury.
• LGMD2B causes muscle wasting, fat infiltration, and loss of ambulation in patients.
• Currently there is no cure and few treatment options.
• Galectin-1 is a small protein that interacts with glycosylated proteins. It shows efficacy in treating murine models of Duchenne Muscular Dystrophy.
• Here we explore the ability of recombinant human Galectin-1 (rHsGal-1) to ameliorate disease pathologies and mechanisms of LGMD2B

Hypothesis: Recombinant human galectin-1 (rHsGal-1) protein …

Bountiful City Source Apportionment Study 2019, Jaron Hansen, Delbert Eatough

ScholarsArchive Data

Quality assured data from air sampling campaign conducted in Bountiful City during February-June 2019.

The Role Of Beta-Hydroxybutyrate In Altering Adipose Mitochondrial Bioenergetics, Chase Mitchell Walton

Theses and Dissertations

The rampant growth of obesity worldwide has stimulated explosive research into human metabolism. Metabolic rate has been shown to be altered by diets differing in macronutrient composition, with low-carbohydrate, ketogenic diets eliciting a significant increase over other interventions. The purpose of this study was to determine the effects of the ketone β-hydroxybutyrate (βHB) on mitochondrial respiration and coupling status in adipose tissue. To explore this, we employed three distinct systems, namely cell, rodent, and human models. In every model, βHB robustly increased mitochondrial respiration. Furthermore, in cultured adipocytes and rodent adipose, we quantified the expression of genes involved in mitochondrial …

"I Am Pamela, Her Own Self!”: Psychosocial And Moral Development In Samuel Richardson’S Pamela, Angelina Dulong

Theses and Dissertations

This paper examines Samuel Richardson's 1740 novel Pamela through two modern models of adolescent development: moral development (Kohlberg and Turiel) and psychosocial development (Erikson, Marcia, and Luyckx et al.). It argues that the novel's eponymous heroine is a complex character who moves beyond the simple stereotypes, being neither a perfect model of feminine virtue nor a coquette on the prowl for a wealthy catch. By examining the developmental arcs Pamela experiences in the novel, it is possible to read her as a typical teenage girl who achieves virtue through errors and growth rather than a static character whose virtue (or …

The Effects Of Telehealth Training On Parents Of Children With Autism In Albania, Freskida Griffiths

Theses and Dissertations

The present study evaluated telehealth training with parents on techniques for working with their children with autism spectrum disorder in Southeastern Europe. The purpose of this study was to research the effects of telehealth training on the parents and the increase of mands on the children. The participants of this study included three mothers and three children, which totaled six participants. Parents were trained on how to increase functional communication in their child. Telehealth training was based on an effective training package called Behavior Skills Training (BST). BST consist of instructions, modeling, rehearsal, and feedback. The resources needed for the …

Stemfi Changes Classrooms: Using The Theory Of Planned Behavior To Explain Barriers To Change In The Stem Faculty Institute (Stemfi) Professional Development Program, Jeffrey Shipley, Jamie Jensen Phd, Haley Mickelsen, Caitlin Playstead

Library/Life Sciences Undergraduate Poster Competition 2020

According to the 2012 PCAST report, only 40% of students who enter college intending to complete a STEM degree are successful in doing so. One of the most common reasons for a student to change majors from a STEM field is the poor quality of instruction. We developed a faculty development program called STEMFI to aid professors in implementing student centered teaching techniques. In order to evaluate the effectiveness of the STEMFI Faculty Institute we performed COPUS analyses before and after an intensive year-long faculty development program.

The Owlet Pregnancy Band: Is It Accurate?, Heather Day

Library/Life Sciences Undergraduate Poster Competition 2020

Fetal heart rate monitoring devices have brought information, assurance, and warnings to doctors and parents about their unborn fetus. In recent years, there has been a push to gather more information through continuous fetal heart rate (FHR) monitoring. Owlet Baby Care has created a continuous pregnancy monitor that uses electrocardiograph (ECG) technology to detect the FHR.

The product has multiple sensors to detect heart rate signals. The sensors will then send the information to the medallion to be processed through a machine learning algorithm. Next, the data will be sent to the user’s phone via an application. The Owlet Pregnancy …

Designing And Assessing New Educational Pedagogies In Biology And Health Promotion, Kristian Ciarah Cook

Theses and Dissertations

Recent developments in educational research raise important questions about the design of learning environments—questions that suggest the value of rethinking what is taught, how it is taught, and how is it assessed. During the past few decades, STEM disciplines began formally recognizing and integrating discipline-based education research (DBER) into their research programs to improve STEM education. One of the less literature-affluent areas of DBER addresses curriculum order and design appertaining to concept types and the order in which we teach those concepts. As educational researchers, we pose the question: does content order matter? In this project we designed, implemented and …

How Governor Thomas Ford's Background, Choices, And Actions Influenced The Martyrdom Of Joseph Smith In Carthage Jail, Stuart Rulan Black

Theses and Dissertations

Thomas Ford was the governor of Illinois at the time of Joseph and Hyrum Smiths’ martyrdoms in Carthage Jail in 1844. Before his tenure as governor, Ford’s professional life included service as an attorney and judge throughout Illinois. His background in the legal field gave him a unique perspective which may have influenced his career as governor of Illinois from 1842-1846. Although Governor Ford is relatively well-known for his association with The Church of Jesus Christ of Latter-day Saints and its history, his background and the bearing it had on the martyrdom of the Smiths has received relatively little attention …

Cubap: An Interactive Web Portal For Analyzing Codon Usage Bias Across Populations, Matthew Hodgman, Justin Miller, Taylor Meurs, John Kauwe

Library/Life Sciences Undergraduate Poster Competition 2020

CUBAP is an interactive web portal that allows users to query population differences in codon usage biases across 17,635 genes. It is freely available at cubap.byu.edu.

A Mindfulness And Contemplative Inquiry Coursefor Pre-Service Art Educators, Rebecca Sue Lewis

Theses and Dissertations

This research project incorporates a series of mindfulness and contemplative workshops withinthe established curriculum of an advanced art studio methods course for pre-service arteducators. Educational research studies suggest that individuals who complete a mindfulnesscourse of study experience increased mental and physical stamina; enhanced memory retention;and decreased irritability, anxiety, depression, and chronic stress. Research also indicates thatindividuals who practice mindfulness have improved relationships and bolstered immunesystems (Williams & Penman, 2012. These studies suggest that mindfulness training can makepositive contributions to teaching and learning, enabling teachers and students to perform at theirbest capacity in their respective roles. Many studies hypothesized that mindfulness …

An Actuarial Approach To Personal Injury Protection Severity, Jason Colgrove

Undergraduate Honors Theses

Insurance companies examine the risk of financial losses for their policyholders as a way to accurately price insurance policies. Within the automobile insurance sector, the frequency of crashes and the associated liabilities started to increase in late 2013 when it had been on the decline for close to a decade. The purpose of this research focuses on the possible correlated variables that could lead to a better understanding of this change. To embark on this task, we teamed up with the Society of Actuaries, Casualty Actuarial Society, and the American Property Casualty Insurance Association to obtain data regarding frequency, severity, …

Bacteria In Blood: Optimized Recovery Of Bacterial Dna For Rapid Identification, Ryan Wood

Theses and Dissertations

Blood stream infections are challenging infections to rapidly diagnose. The current clinical diagnostic methods for blood stream infections require culturing the blood sample prior to identifying the bacteria and any resistance the bacteria may contain. Removing the culturing step from the bacterial identification process of a blood stream infection provides a significant reduction in the processing time. However, eliminating the culturing step shifts the difficulty from processing time to concentration, since clinical concentration levels can be as low as 10 CFU/mL in blood. This dissertation developed and evaluated many aspects of the process required to identify bacteria from a blood …

Faculty Orientations In Esl Professional Development, Jason T. Jay

Theses and Dissertations

The role of teacher educators is vital to education, but when the population of public-school students shifts, or progress and advances in knowledge of the field or knowledge for teaching emerge, teacher education faces challenges. One such challenge involves a continuing increase in the proportion of second language learners entering primary and secondary schools, English learners (ELs) in this case. In such situations, teacher educators often do not have deep knowledge of second language acquisition or how to integrate attention to ELs within their regular courses. One response to this challenge is to provide professional development (PD) for teacher education …

Immobilization Of Copper Nanoparticles Onto Various Supports Applications In Catalysis, Anh Hoang Tu Nguyen Sorenson

Theses and Dissertations

Copper-based materials are one of the most promising catalysts for performing transformations of important organic compounds in both academic and industrial operations. However, it is challenging to consistently synthesize highly active and stable copper species as heterogeneous catalysts due to their relatively high surface energy. As a result, agglomeration usually occurs, which limits the catalytic activities of the copper species. The work presented in this dissertation shows different synthetic strategies for obtaining active and stable copper-based materials by modifying chemical/physical properties of copper nanoparticles (NPs). Emphasis is placed on discussing specific catalytic systems, including carbon-supported catalysts (monometallic and bimetallic copper-based …

The Investigation Of Functionalized Carbon Nanotubes For The Carbon Dioxide Capture And Ethane Oxidative Dehyrogenation Catalysts, Zheng Zhou

Theses and Dissertations

Carbon nanotubes (CNT) have gained interest for wide use as both support and catalyst due to the ease of uniquely tunable surface chemistry. Increasingly severe greenhouse effects have attracted attention to novel materials and technologies capable of capturing carbon dioxide (CO2). In this context, we develop a CNT based solid state amine for the CO2 capture. CNT are functionalized under various methods as a support for polymeric amines. Polyethyleneimine are physically adsorbed on CNT and are further characterized and studied for reversible CO2 capture. We obtain a high CO2 capture capacity (6.78 mmol∙g-1) for linear polyethyleneimine (LPEI) and 6.18 mmol∙g-1 …

Retiming Smoke Simulation Using Machine Learning, Samuel Charles Gérard Giraud Carrier

Theses and Dissertations

Art-directability is a crucial aspect of creating aesthetically pleasing visual effects that help tell stories. A particularly common method of art direction is the retiming of a simulation. Unfortunately, the means of retiming an existing simulation sequence which preserves the desired shapes is an ill-defined problem. Naively interpolating values between frames leads to visual artifacts such as choppy frames or jittering intensities. Due to the difficulty in formulating a proper interpolation method we elect to use a machine learning approach to approximate this function. Our model is based on the ODE-net structure and reproduces a set of desired time samples …