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Articles 1141 - 1170 of 8047
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Intermountain West Lichen Dna Reference Library, Brian Colgrove
Intermountain West Lichen Dna Reference Library, Brian Colgrove
Undergraduate Honors Theses
Accurate estimates of biodiversity can play crucial roles in monitoring ecological health. BYU’s Lichen Air Quality Biomonitoring program (Wright) represents one of the largest biomonitoring programs in the nation. Recently, DNA metabarcoding approaches have shown promise in streamlining lichen biodiversity inventories. However, to date, lichen diversity of western North America is poorly represented in available DNA reference libraries, preventing biologists and land managers from using DNA barcoding to identify unknown specimens. To solve this problem, I have developed a DNA reference library for over 500 species occurring in the Intermountain West region. Using bioinformatic and statistical tools, I created a …
Who Uses Multi-Factor Authentication?, Leah Roberts
Who Uses Multi-Factor Authentication?, Leah Roberts
Undergraduate Honors Theses
A sample of 47 BYU students were recruited to participate in this study to determine who was using Multi-factor Authentication (MFA) on their online accounts. This study determined that there were many different factors that separated those who used MFA and those who did not. Some of those factors included: time spent on the internet each day, gender, the website itself, and personal privacy behaviors.
A Fret Flow Cytometry-Based Screening Assay For Multiplex Analysis Of Metabolites In T. Brucei, Ronald A. Zegarra
A Fret Flow Cytometry-Based Screening Assay For Multiplex Analysis Of Metabolites In T. Brucei, Ronald A. Zegarra
Undergraduate Honors Theses
Kinetoplastid parasites are a significant public health issue in some tropical and subtropical regions of the world. Kinetoplastid parasites all require glycolysis for survival, with host glucose key for ATP production. One such parasite, Trypanosoma brucei, exclusively metabolizes glucose in its bloodstream form. Trypanosomal glycolysis is unique because it displays unconventional structural features. Hence, glucose metabolism has been studied extensively in T. brucei and is a therapeutic target in kinetoplastid parasites.The lack of in vivo analytical techniques for measuring vital glycolytic metabolites in situ has restricted the ability of researchers to test, with high sensitivity and specificity, the essential roles …
High-Speed Image Classification For Resource-Limited Systems Using Binary Values, Taylor Scott Simons
High-Speed Image Classification For Resource-Limited Systems Using Binary Values, Taylor Scott Simons
Theses and Dissertations
Image classification is a memory- and compute-intensive task. It is difficult to implement high-speed image classification algorithms on resource-limited systems like FPGAs and embedded computers. Most image classification algorithms require many fixed- and/or floating-point operations and values. In this work, we explore the use of binary values to reduce the memory and compute requirements of image classification algorithms. Our objective was to implement these algorithms on resource-limited systems while maintaining comparable accuracy and high speeds. By implementing high-speed image classification algorithms on resource-limited systems like embedded computers, FPGAs, and ASICs, automated visual inspection can be performed on small low-powered systems. …
Preparing K-12 Teachers For Blended Teaching: An Exploration Of Peer-Reviewed Research, Important Practices, And Teacher Experiences, Cecil R. Short
Preparing K-12 Teachers For Blended Teaching: An Exploration Of Peer-Reviewed Research, Important Practices, And Teacher Experiences, Cecil R. Short
Theses and Dissertations
This multiple-article dissertation explores K-12 blended teacher preparation. A literature review describes research trends from 88 articles published in peer-reviewed journals. It reports that current K-12 blended teacher preparation research focuses on explorations of blended teaching literature; professional development and coursework used for blended teacher preparation; defining, developing, and implementing blended teaching competencies; and measuring blended teaching readiness. The literature review suggests that additional work is needed to uncover specific practices that K-12 blended teachers are using across disciplines and grade levels, as well as whether there are specific pedagogies that seem to be effective within specific disciplines and grade …
What Did You Say? Investigating The Relationship Of Self-Perceived Communication Competence And Mindfulness In Communication On Levels Of Organizational Trust In A Postsecondary Academic Library, Rebecca Jo Peterson
Theses and Dissertations
Successful educational systems are established, maintained, and cultivated on a foundation of trust. Effective communication among colleagues is widely accepted as a characteristic of groups who establish and maintain high levels of trust. Despite the importance of the relationships between interpersonal communication skills and levels of organizational trust in postsecondary educational settings, there is very little published on this topic. Further, no published research was located that examined relationships between measures of mindfulness in communication with levels of organizational trust in postsecondary educational settings. This study examined relationships between measures of competent and mindful communication with levels of organizational trust …
Student Preferences And Decisions For Online Or In-Person Class Sessions In Blended Learning, James Max Christensen
Student Preferences And Decisions For Online Or In-Person Class Sessions In Blended Learning, James Max Christensen
Theses and Dissertations
Online learning sessions are becoming increasingly common. In this study, we reviewed over 150 studies of online and blended learning, revealing that the factors that affect student preferences for online or in-person learning vary widely and compiled a table of these factors. They can be categorized as either learning preferences or current lifestyle conditions. To better understand these preferences, we implemented an intervention in which college-level engineering students were given the choice to attend either an online or in-person session for a class they normally attended in a different modality. We compared college students' stated preferences with demonstrated attendance for …
Exploration Of Fluorinated Α,Β-Dehydroamino Acids And Their Structure, Austin Lesueur
Exploration Of Fluorinated Α,Β-Dehydroamino Acids And Their Structure, Austin Lesueur
Undergraduate Honors Theses
This thesis explores the synthesis of fluorinated α,β-dehydroamino acids, specifically a fluorinated dehydrovaline derivative. Previous work has been done on the equivalent dehydrovaline derivative without fluorine present and this work builds toward the fluorinated version with the goal of comparing the two structurally. The synthesis presented here pulls from previous synthetic strategies employed for dehydrovaline while also exploring the synthetic impact of the electronegative fluorine atoms.
Interpretable Fine-Grained Visual Categorization, Pei Guo
Interpretable Fine-Grained Visual Categorization, Pei Guo
Theses and Dissertations
Not all categories are created equal in object recognition. Fine-grained visual categorization (FGVC) is a branch of visual object recognition that aims to distinguish subordinate categories within a basic-level category. Examples include classifying an image of a bird into specific species like "Western Gull" or "California Gull". Such subordinate categories exhibit characteristics like small inter-category variation and large intra-class variation, making distinguishing them extremely difficult. To address such challenges, an algorithm should be able to focus on object parts and be invariant to object pose. Like many other computer vision tasks, FGVC has witnessed phenomenal advancement following the resurgence of …
Implementation Of Student-Centered Teaching Methods Among Stem Faculty, Melissa Cavan
Implementation Of Student-Centered Teaching Methods Among Stem Faculty, Melissa Cavan
Theses and Dissertations
Students at the college level need good instruction and active learning has been shown to improve student retention and learning. Science, Technology, Engineering, and Math Faculty Institution (STEMFI) aims to assist faculty in implementing active learning in the classroom. This qualitative case study sought to understand faculty perspectives two years after completion of STEMFI in the areas of active learning implementation, methodology and student attitudes and impact. Data collected reported that the faculty participants still use active learning strategies in their classrooms two years after exiting the STEMFI program. The faculty also felt the need for a refresher course and …
"The Problem Of Missing Data And The Conover Solution In State-Level Data", David Michael Simpson
"The Problem Of Missing Data And The Conover Solution In State-Level Data", David Michael Simpson
Theses and Dissertations
The Conover Solution is a nonparametric method used to analyze relative growth in students' achievement on state tests administered on two or more occasions. However, there has been very little research assessing the robustness of this method in the presence of missing data. Using vertically scaled and non-vertically scaled data from the math portion of a statewide assessment for grades 4-7, I compare results from listwise deletion and multiple imputation across the residual gain score model, the simple gain score model, and the HLM-NPAR model. In these approaches, I study differences by gender and race in two-level models and then …
The Role Of The Cytosolic Chaperonin Cct In Folding Β-Propeller Proteins, William Grant Ludlam
The Role Of The Cytosolic Chaperonin Cct In Folding Β-Propeller Proteins, William Grant Ludlam
Theses and Dissertations
Many Proteins require the aid of molecular chaperones to achieve a stable folding state and avoid misfolding pathologies. A major eukaryotic chaperone is the cytosolic chaperonin CCT. While CCT is known to fold a significant portion of all cytosolic proteins, there is no general model for the mechanism CCT uses to fold substrate proteins. One class of proteins that CCT is known to fold are β-propeller containing proteins. Here, we present structural and biochemical data on the processes that CCT uses to fold three distinct β-propeller proteins: the G-protein Beta 5 (Gβ5) subunit of the Gβ5-RGS complex, mLST8 of the …
Cationic Steroid Antimicrobials: Applications To Medical Device Coatings, Mechanism Of Pro-Osteogenic Properties, And Potential Synergy With Common Antifungals, Brian J. Hilton
Theses and Dissertations
Cationic steroid antimicrobials (CSAs or ceragenins) are a novel class of synthetic, cholic acid-based mimics of endogenous antimicrobial peptides. These small molecule compounds display broad bactericidal activity against gram-negative and gram-positive bacteria, potent ability against fungal pathogens, and cidal effects against drug resistant and multidrug resistant microbes. Implantable medical devices provide an abiotic surface upon which bacteria and fungi can accumulate--thereby leading to localized or systemic infection. We proposed that CSA antibiotics can be incorporated into medical device surface coatings which can be optimized for the active release or elution of the CSA compounds over time to prevent device-associated infections. …
Simple Ssh Management, Torstein Calvin Collett
Simple Ssh Management, Torstein Calvin Collett
Theses and Dissertations
SSH certificates are used by administrators so connections to the server can be verified. This ensures that only authorized administrators can access the server and that the server being accessed is the intended machine. Current solutions for managing SSH certificates are focused on commercial use, which makes them cumbersome for small groups and individuals to use. These solutions require running multiple services that companies already use but add significant overhead for smaller groups. We developed a new standalone system that makes it easy to manage SSH certificates for small amounts of servers and users, without requiring additional servers to be …
Romantic Symbolism Re-Examined: The Ontic Fallacy, Ryan Mitchell Worth
Romantic Symbolism Re-Examined: The Ontic Fallacy, Ryan Mitchell Worth
Theses and Dissertations
Romantic symbolism is a poorly understood concept. It was first formulated by the Romantics in a variety of contexts. Goethe develops his theory of the symbol most notably in his scientific works. Schelling's approach to the Romantic symbol is firmly rooted in his philosophical writings. Coleridge articulates a Romantic notion of symbolism across his extensive literary criticism. The foundational influence of these related theories of Romantic symbolism can be seen in the artistic, literary, and scientific productions of Romantic minded individuals all over Europe in the late eighteenth and early nineteenth century. However, the nature and scope of the Romantic …
Certifying Computer Forensics Skills, Michael Charles Watson
Certifying Computer Forensics Skills, Michael Charles Watson
Theses and Dissertations
Computer forensics is an ever-growing technological field of complexity and depth. Individuals must strive to keep learning and growing their skills as they help combat cybercrime throughout the world. This study attempts to establish a method of evaluating conceptual expertise in computer forensics to help indicate whether or not an individual understands the five basic phases of computer forensics: preparation, seizure of evidence, acquisition of data, analysis of data, and reporting the findings of the analysis. A survey was presented to a university class of 30 students taking a computer forensics course and as well as posted online asking computer …
Developing The Definite Integral And Accumulation Function Through Adding Up Pieces: A Hypothetical Learning Trajectory, Brinley Nichole Stevens
Developing The Definite Integral And Accumulation Function Through Adding Up Pieces: A Hypothetical Learning Trajectory, Brinley Nichole Stevens
Theses and Dissertations
Integration is a core concept of calculus. As such, significant work has been done on understanding how students come to reason about integrals, including both the definite integral and the accumulation function. A path towards understanding the accumulation function first, then the definite integral as a single point on the accumulation function has been presented in the literature. However, there seems to be an accessible path that begins first with understanding the definite integral through an Adding Up Pieces (AUP) perspective and extending that understanding to the accumulation function. This study provides a viable hypothetical learning trajectory (HLT) for beginning …
Zeros Of A Family Of Complex Harmonic Polynomials, Samantha Sandberg
Zeros Of A Family Of Complex Harmonic Polynomials, Samantha Sandberg
Theses and Dissertations
In this thesis we study complex harmonic functions of the form f where f is the sum of a nonconstant analytic and a nonconstant anti-analytic function of one variable. The Fundamental Theorem of Algebra does not apply to such functions, so we ask how many zeros a complex harmonic function can have and where those zeros are located. This thesis focuses on the complex harmonic family of polynomials p_c where p_c is the sum of z+(c/2)z^2 and the conjugate of (c/(n-1))z^(n-1)+(1/n)z^n. We first establish properties of the critical curve, which separates orientation preserving and reversing regions. These properties are then …
Editorial Introduction, Betsy Gilliland, Katherine Daily O'Meara
Editorial Introduction, Betsy Gilliland, Katherine Daily O'Meara
Journal of Response to Writing
No abstract provided.
Teacher Perspectives On Students With Special Educational Needs Enrolled In Secondary-Level World Language Classes In The State Of Utah, María Fernanda Zamora Sánchez
Teacher Perspectives On Students With Special Educational Needs Enrolled In Secondary-Level World Language Classes In The State Of Utah, María Fernanda Zamora Sánchez
Theses and Dissertations
Research was conducted on students with special educational needs (SEN) taking world language (WL) classes at the secondary level in the state of Utah. Ninety-two WL teachers shared their outlooks and experiences on working with this population of students. Data analyses show that there is not a significant increase in the number of students with SEN enrolled in WL classes. Analyses suggest that WL teachers have an average of two students with SEN per class, learning disability being the most common SEN identified. This study also shares teachers' successful and challenging experiences, finding that time and individual attention are examples …
Pegylation Stabilizes The Conformation Of Proteins And The Noncovalent Interactions Within Them, Steven R. E. Draper
Pegylation Stabilizes The Conformation Of Proteins And The Noncovalent Interactions Within Them, Steven R. E. Draper
Theses and Dissertations
PEGylation has been used for decades to enhance the pharmacokinetic properties of protein therapeutics. This method has been effective at increasing the serum half-life of these drugs, but the mechanism of how it does this is unclear. Chapter 1 is an introduction to the methods of PEGylation. In chapter 2 we show that the effect of PEGylation on the conformational stability of the WW domain differs based on amino acid linker and conjugation site. We show that all positions in the WW domain that were tested can be stabilized by at least one amino acid linker. The rate of proteolysis …
Reinforcement Learning With Auxiliary Memory, Sterling Suggs
Reinforcement Learning With Auxiliary Memory, Sterling Suggs
Theses and Dissertations
Deep reinforcement learning algorithms typically require vast amounts of data to train to a useful level of performance. Each time new data is encountered, the network must inefficiently update all of its parameters. Auxiliary memory units can help deep neural networks train more efficiently by separating computation from storage, and providing a means to rapidly store and retrieve precise information. We present four deep reinforcement learning models augmented with external memory, and benchmark their performance on ten tasks from the Arcade Learning Environment. Our discussion and insights will be helpful for future RL researchers developing their own memory agents.
An Engaging Worksheet: Number Ninjitzu, The Mobile Game, Abby Hull
An Engaging Worksheet: Number Ninjitzu, The Mobile Game, Abby Hull
Instructional Psychology and Technology Graduate Student Projects
The purpose of this project was to make a math worksheet more engaging by turning the answering of elementary math questions into a game. The game should encourage young learners to practice arithmetic more. The project takes the form of a mobile platformer game and the target audience is 1st-3rd graders.
Estimation And Simulation Of Daily Activity Patterns For Individuals Using Wheelchairs, Nathan John Lant
Estimation And Simulation Of Daily Activity Patterns For Individuals Using Wheelchairs, Nathan John Lant
Theses and Dissertations
Individuals who use wheelchairs or who have other mobility challenges often are unable to access modern mobility systems "“ including application-based ride hailing and on-demand microtransit. Even designing a system targeted at these users is challenging, given the limited prior analysis of their travel behavior and activity patterns. Simulation tools are used by cities around the world to understand novel and complex transportation systems, yet few are including the needs of users with disabilities in these simulation studies. This thesis examines the travel patterns of wheelchair users from the 2017 National Household Travel Survey and presents a model of daily …
Birth Order: Shaping Lives One Sibling At A Time, Savannah Sarvey
Birth Order: Shaping Lives One Sibling At A Time, Savannah Sarvey
Intuition: The BYU Undergraduate Journal of Psychology
Personality development, and even intelligence, is influenced by family members once a child is brought into the world. The family, especially the siblings, has a notable impact on the child’s development. Siblings provide the first social interactions children have, both positive and negative. Siblings affect the personality and intellectual development of individuals via differences in family responsibilities and changes that arise in the home environment as more children are added to the household. Older siblings will likely have stronger leadership skills because of these responsibilities, and younger children may not receive as many benefits in intellectual abilities because of these …
Small-Target Detection And Observation With Vision-Enabled Fixed-Wing Unmanned Aircraft Systems, Hayden Matthew Morgan
Small-Target Detection And Observation With Vision-Enabled Fixed-Wing Unmanned Aircraft Systems, Hayden Matthew Morgan
Theses and Dissertations
This thesis focuses on vision-based detection and observation of small, slow-moving targets using a gimballed fixed-wing unmanned aircraft system (UAS). Generally, visual tracking algorithms are tuned to detect motion of relatively large objects in the scene with noticeably significant motion; therefore, applications such as high-altitude visual searches for human motion often ignore target motion as noise. Furthermore, after a target is identified, arbitrary maneuvers for transitioning to overhead orbits for better observation may result in temporary or permanent loss of target visibility. We present guidelines for tuning parameters of the Visual Multiple Target Tracking (Visual MTT) algorithm to enhance its …
Spatiospectral Features In Supersonic, Highly Heated Jet Noise, Kevin Matthew Leete
Spatiospectral Features In Supersonic, Highly Heated Jet Noise, Kevin Matthew Leete
Theses and Dissertations
The sound produced by military aircraft is dominated by noise generated by the turbulent mixing of the jetted exhaust with the ambient air. This jet noise has the potential to annoy the community and pose a hearing loss risk for military personnel. The goal of this dissertation is to characterize spatiospectral features in the field produced by full-scale military aircraft that are not traditionally seen at the laboratory scale and identify potential noise mechanisms for these features. Measurements of two military aircraft jet noise fields are found to be best described as a superposition of spatiospectral lobes, whose relative amplitudes …
Professional Development And Change In Teachers' Beliefs And Practice For Teaching English Language Learners, Kerong Wu
Theses and Dissertations
To provide quality education to all students, including ELLs, teachers need professional development designed and enacted according to best practice. However, a common problem for professional development is that teachers' practices often do not change. Implemented through the partnership collaboration with university, education, and public school faculty, the professional development designed in this study focused on educating teachers about needed content and engaging them in ways that would increase the likelihood they would enact such practices in their classrooms (Desimone, 2009; Opfer & Pedder, 2011; Penuel et al., 2007). The professional development program comprised six courses that adhered to the …
Google Earth Engine Tools For Long-Term Spatiotemporal Monitoring Of Chlorophyll-A Concentrations, Anna Cardall, Kaylee Brook Tanner, Gustavious Paul Williams
Google Earth Engine Tools For Long-Term Spatiotemporal Monitoring Of Chlorophyll-A Concentrations, Anna Cardall, Kaylee Brook Tanner, Gustavious Paul Williams
Open Water Journal
We present a set of Google Earth Engine (GEE) tools to process long-term satellite imagery to analyze the time history of algal concentrations in a lake or reservoir. We demonstrate these tools with a case study on Utah Lake, Utah, USA. Our tools collect and process Landsat surface reflectance images from three different Landsat missions: Landsat 5, Landsat 7, and Landsat 8. These satellites represent data from 1984 until the present at 16-day intervals: over 1,000 images, though not all images are usable due to weather, ice, and other issues. We present the GEE commands or tools to mask these …