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Carbon Nanotube Prosthetic Venous Valve, Ryan Coulton Packer
Carbon Nanotube Prosthetic Venous Valve, Ryan Coulton Packer
Theses and Dissertations
Chronic Venous Insufficiency (CVI) is a disease of the lower limbs that affects millions of people in the United States. It is categorized by constant venous hypertension, which can lead to swelling of the legs, pain, skin changes and ulcers. One of the widely known symptoms that can lead to CVI is varicose veins. The main source of the problem of CVI is incompetent venous valves. The purpose of venous valves is to direct blood through the veins to the heart and prevent retrograde flow to the lower limbs. CVI can be caused by leg injury, pregnancy, genetics, age, and …
A Robust Synthetic Basis Feature Descriptor Implementation And Applications Pertaining To Visual Odometry, Object Detection, And Image Stitching, Lindsey Ann Raven
A Robust Synthetic Basis Feature Descriptor Implementation And Applications Pertaining To Visual Odometry, Object Detection, And Image Stitching, Lindsey Ann Raven
Theses and Dissertations
Feature detection and matching is an important step in many object tracking and detection algorithms. This paper discusses methods to improve upon previous work on the SYnthetic BAsis feature descriptor (SYBA) algorithm, which describes and compares image features in an efficient and discreet manner. SYBA utilizes synthetic basis images overlaid on a feature region of interest (FRI) to generate binary numbers that uniquely describe the feature contained within the FRI. These binary numbers are then used to compare against feature values in subsequent images for matching. However, in a non-ideal environment the accuracy of the feature matching suffers due to …
Acetobacter Fabarum Genes Influencing Drosophila Melanogaster Phenotypes, Kylie Makay White
Acetobacter Fabarum Genes Influencing Drosophila Melanogaster Phenotypes, Kylie Makay White
Theses and Dissertations
Research in our lab has predicted hundreds of bacterial genes that influence nine different traits in the fruit fly, Drosophila melanogaster. As a practical alternative to creating site-directed mutants for each of the predicted genes, we created an arrayed transposon insertion library using a strain of Acetobacter fabarum DsW_054 isolated from fruit flies. Creation of the Acetobacter fabarum DsW_054 gene knock-out library was done through random transposon insertion, combinatorial mapping and Illumina sequencing. Successful mapping of transposon insertion was achieved for 6418 mutants with hits within 63% of annotated genes within Acetobacter fabarum DsW_054. Insertion sites were verified in …
Moving Toward And Away From Others: A Person-Centered Analysis Of Social Orientations In Emerging Adulthood, Nathan A. Jorgensen
Moving Toward And Away From Others: A Person-Centered Analysis Of Social Orientations In Emerging Adulthood, Nathan A. Jorgensen
Theses and Dissertations
Emerging adulthood is a time rife with transitions, and is thus an important time period to study the various ways in which people both connect with and move away from others, or how they are socially oriented. Previous research has suggested a number of factors that contribute to social orientations, including social motivations, the self in relation to others, other-directed emotions and cognitions, and actual social behaviors. The current study examined what types of social orientations exist and how they relate to indices of relational and individual well-being in a sample of US emerging adults (N = 787). Using latent …
Computational Exploration Of Vortex Nucleation In Type Ii Superconductors Using A Finite Element Method In Ginzburg-Landau Theory, Alden Roy Pack
Computational Exploration Of Vortex Nucleation In Type Ii Superconductors Using A Finite Element Method In Ginzburg-Landau Theory, Alden Roy Pack
Theses and Dissertations
Using a finite element method, we numerically solve the time-dependent Ginzburg-Landau equations of superconductivity to explore vortex nucleation in type II superconductors. We consider a cylindrical geometry and simulate the transition from a superconducting state to a mixed state. Using saddle-node bifurcation theory we evaluate the superheating field for a cylinder. We explore how surface roughness and thermal fluctuations influence vortex nucleation. This allows us to simulate material inhomogeneities that may lead to instabilities in superconducting resonant frequency cavities used in particle accelerators.
Assembly, Annotation And Optical Mapping Of The A Subgenome Of Avena, Rebekah Ann Lee
Assembly, Annotation And Optical Mapping Of The A Subgenome Of Avena, Rebekah Ann Lee
Theses and Dissertations
Common oat (Avena) has held a significant place within the global crop community for centuries; although its cultivation has decreased over the past century, its nutritional benefits have recently garnered increased interest for human consumption. No published reference sequences are available for any of the three oat subgenomes. Here we report a quality sequence assembly, annotation and hybrid optical map of the A-genome diploid Avena atlantica Baum and Fedak. The assembly is composed of a total of 3,417 contigs with an N50 of 11.86 Mb and an estimated completeness of 97.6%. This genome sequence will be a valuable research tool …
Faculty Perceptions Of Open Educational Resources Quality By Peer Review, Olga Maria Belikov
Faculty Perceptions Of Open Educational Resources Quality By Peer Review, Olga Maria Belikov
Theses and Dissertations
In this paper, 936 faculty free response reviews of open textbooks from the Open Textbook Library were analyzed for content and themes. The reviews were completed by faculty members at institutions in the United States and Canada. The textbooks were evaluated regarding their comprehensiveness, content accuracy, relevance longevity, clarity, consistency, modularity, organization structure flow, interface, grammatical errors, and cultural relevance. The results of the reviews found that the across 9360 comments regarding the quality of open textbooks, of these comments 97.3% reflected adequate or exceptional reviews of the textbooks. Faculty often compared the texts to traditional textbooks and in all …
Understanding Community And Ecophysiology Of Plant Species On The Colorado Plateau, Hannah Elizabeth Yokum
Understanding Community And Ecophysiology Of Plant Species On The Colorado Plateau, Hannah Elizabeth Yokum
Theses and Dissertations
The intensification of aridity due to anthropogenic climate change is likely to have a large impact on the growth and survival of plant species in the southwestern U.S. where species are already vulnerable to high temperatures and limited precipitation. Global climate change impacts plants through a rising temperature effect, CO2 effect, and land management. In order to forecast the impacts of global climate change, it is necessary to know the current conditions and create a baseline for future comparisons and to understand the factors and players that will affect what happens in the future. The objective of Chapter 1 is …
"To You I Give Myself, For I Am Yours": Editorial Giving And Taking In Shakespeare's As You Like It, Jennifer Jean Thorup
"To You I Give Myself, For I Am Yours": Editorial Giving And Taking In Shakespeare's As You Like It, Jennifer Jean Thorup
Theses and Dissertations
In As You Like It 5.4.107-08 we receive Rosalind returning as herself”a woman”no longer in the guise of Ganymede, the boy page. Her first lines upon returning are repetitive: To you I give myself, for I am yours [To Duke Senior] / To you I give myself, for I am yours [To Orlando]. However, comparing Folio versions of these lines produces a provocative variant. In the third and fourth folios, these lines are no longer a repetitious patriarchal pledging, but a tender dialogic exchange "much like vows" between Rosalind and Orlando. While none of our modern Shakespeare editions make a …
Reliability Of Feqdrain For Modeling Performance Of Sand Treated With Large-Diameter Prefabricated Drains For Liquefaction Mitigation, Travis Hatch Meservy
Reliability Of Feqdrain For Modeling Performance Of Sand Treated With Large-Diameter Prefabricated Drains For Liquefaction Mitigation, Travis Hatch Meservy
Theses and Dissertations
Finite element modeling of laminar shear box testing that consisted of loose sand treated with large diameter prefabricated vertical drains (PVDs), was performed. The objective of the modeling was to evaluate the reliability of the computer program FEQDrain for predicting excess pore pressure ratios (Ru) at sites treated with prefabricated drains. FEQDrain was found to be capable of successfully modeling measured excess pore pressure ratio time histories from the laminar shear box experiment, as long as an appropriate combination of ˜number of equivalent cycles and ˜shaking duration was chosen, and sensitive parameters were in the range of measured values. Hydraulic …
An Investigation Of Elementary Teachers<'> Self-Efficacy For And Beliefs About The Importance Of Engineering Education, Khristen Lee Massic
An Investigation Of Elementary Teachers<'> Self-Efficacy For And Beliefs About The Importance Of Engineering Education, Khristen Lee Massic
Theses and Dissertations
In order for the United States to regain its global standing in science and engineering, educational and governmental organizations have started to re-emphasize science, technology, engineering, and math content in k-12 classrooms.While some preliminary research has been conducted on student and teacher perceptions related to engineering, there has been little research conducted related to teachers beliefs about the importance of engineering content in their classrooms and relatively few studies have investigated elementary teachers teaching engineering self-efficacy. Current studies have investigated the impact of professional development on teachers teaching engineering self-efficacy but these studies were conducted with limited sample sizes, for …
"What More Could I Have Done?" A Graduate Student's Experience Teaching Writing About Writing, Lena May Harper
"What More Could I Have Done?" A Graduate Student's Experience Teaching Writing About Writing, Lena May Harper
Theses and Dissertations
As writing about writing (WAW) research enters its second wave, characterized not only by an increase in data-driven studies that theorize and assess the effectiveness of WAW curricula (Downs) but also by an increase in its prominence and adaptation, particularly among emerging writing studies scholars and teachers (e.g., Bird et al.), a space has opened for more and varied types of research, especially empirical research, to determine its effectiveness and to produce more solid recommendations for training and curriculum development, especially for those who are new to the field. This case study, which highlights how a novice teacher responds to …
"Speak Up!" An Examination Of The Language Abilities Of Children Displaying Various Forms Of Social Withdrawal And Aggression, Brandon Neil Clifford
"Speak Up!" An Examination Of The Language Abilities Of Children Displaying Various Forms Of Social Withdrawal And Aggression, Brandon Neil Clifford
Theses and Dissertations
Language serves as a mechanism through which children are able to interact and communicate with their others. Thus, when children do not produce language at a typical pace, there may be cause for concern. The primary purpose of the current study was to examine the language abilities of children displaying various forms of social withdrawal and children engaging in subtypes of aggression. Participants came from the Brigham Young University Child Laboratory (N = 141; Mage = 4.57; 53% female) and were observed and teachers and parents completed reports on children's behaviors and demographics. Results revealed reticent and solitary-passive children to …
The Effectiveness Of Utilizing The Treatment Support Measure For Treatment Planning In Youth Mental Health Services, Adam D. Garland
The Effectiveness Of Utilizing The Treatment Support Measure For Treatment Planning In Youth Mental Health Services, Adam D. Garland
Theses and Dissertations
The use of treatment support tools to enhance client outcomes is not well understood in the youth treatment literature. Adult outcome researchers have found that the use of Clinical Support Tools (CST) leads to improved outcomes with clients identified as at risk for treatment failure. However, the American Psychological Association (APA) has noted that understanding important client factors that influence treatment is critical during the clinical formulation and treatment planning phase of therapy. No studies to date have evaluated the effectiveness of utilizing a CST as a treatment planning tool with youth clients. The purpose of this study was to …
Phased-Array Feed Instrumentation And Processing For Astronomical Detection, Interference Mitigation, And Transient Parameter Estimation, Richard Allen Black
Phased-Array Feed Instrumentation And Processing For Astronomical Detection, Interference Mitigation, And Transient Parameter Estimation, Richard Allen Black
Theses and Dissertations
Radio astronomy, the survey and study of naturally occurring astronomical radio signals, is a challenging field in terms of engineering requirements. The typical astronomical signal of interest is incredibly faint, resulting in very low signal-to-noise ratios (SNRs) on the order of -30 dB or lower. To detect such signals, one must have an uncommonly low and stable receiver noise temperature, high gain through large aperture reflectors, and state-of-the-art signal processing algorithms. One must also be able to mitigate the effects of interference, the presence of which, even if extremely weak, can completely mask the faint astronomical signals of interest. To …
Las Lágrimas Y El Corazón De Mi Identidad: Bruna Husky, La Posthumana De Rosa Montero, Elizabeth Montero Mattos
Las Lágrimas Y El Corazón De Mi Identidad: Bruna Husky, La Posthumana De Rosa Montero, Elizabeth Montero Mattos
Theses and Dissertations
Este proyecto pretende el análisis de dos obras de ciencia ficción de la escritora española Rosa Montero, Lágrimas en la lluvia y El peso del corazón. Teniendo como eje principal el proceso de obtención de la identidad de una posthumana, la protagonista de ambas obras literarias, Bruna Husky. Si bien la naturaleza posthumana ha desafiado y quebrantado la noción de identidad en sus individuos, mediante la experiencia de una vida alrededor de otros que pueden formar una parafamilia se obtiene un espejo visionario de sí mismo necesario para la obtención de dicha identidad. En el primer libro, esta posthumana …
Strain Path Effect On Austenite Transformation And Ductility In Q&P 1180 Steel, Jeffrey Grant Cramer
Strain Path Effect On Austenite Transformation And Ductility In Q&P 1180 Steel, Jeffrey Grant Cramer
Theses and Dissertations
The ductility of Q&P 1180 steel was studied with regard to retained austenite transformation under different strain paths. Specimens were tested in uniaxial tension in a standard test frame as well as in situ in the scanning electron microscope (SEM). Then digital image correlation (DIC) was used to compute the effective strain at the level of the individual phases in the microstructure. Stretching experiments were also performed using limiting dome height (LDH) tooling, where specimens were strained in both biaxial and plane strain tension. The experiments were done incrementally, for each strain path, and the retained austenite at each level …
Dissolved Organic Carbon And Dissolved Metal Pulses During Snowmelt Runoff In The Upper Provo River Watershed, Utah, Usa, Hannah Nicole Checketts
Dissolved Organic Carbon And Dissolved Metal Pulses During Snowmelt Runoff In The Upper Provo River Watershed, Utah, Usa, Hannah Nicole Checketts
Theses and Dissertations
Snowmelt river systems exhibit seasonal fluxes in water chemistry, potentially affecting the water supply of one-sixth of the worlds population. In this study, we examined water chemistry of the upper Provo River, northern Utah, which supplies water to over two million people along the urban Wasatch Front. Seasonal changes in water chemistry were characterized by analyzing discharge and dissolved organic carbon (DOC) with dissolved trace metal and cation concentrations (La, Pb, Cu, Al, Be, Sr and K) over three consecutive water years 20142016, with intensive sampling during snowmelt runoff. To better understand links between metal movement and DOC, we sampled …
Reliability Of Feqdrain For Modeling Performance Of Sand Treated With Large-Diameter Prefabricated Drains For Liquefaction Mitigation, Travis Hatch Meservy
Reliability Of Feqdrain For Modeling Performance Of Sand Treated With Large-Diameter Prefabricated Drains For Liquefaction Mitigation, Travis Hatch Meservy
Theses and Dissertations
Finite element modeling of laminar shear box testing that consisted of loose sand treated with large diameter prefabricated vertical drains (PVDs), was performed. The objective of the modeling was to evaluate the reliability of the computer program FEQDrain for predicting excess pore pressure ratios (Ru) at sites treated with prefabricated drains. FEQDrain was found to be capable of successfully modeling measured excess pore pressure ratio time histories from the laminar shear box experiment, as long as an appropriate combination of €˜number of equivalent cycles and €˜shaking duration was chosen, and sensitive parameters were in the range of measured values. Hydraulic …
An Obstacle Avoidance System For The Visually Impaired Using 3-D Point Cloud Processing, Evan Justin Taylor
An Obstacle Avoidance System For The Visually Impaired Using 3-D Point Cloud Processing, Evan Justin Taylor
Theses and Dissertations
The long white cane offers many benefits for the blind and visually impaired. Still, many report being injured both indoors and outdoors while using the long white cane. One frequent cause of injury is due to the fact that the long white cane cannot detect obstacles above the waist of the user. This thesis presents a system that attempts to augment the capabilities of the long white cane by sensing the environment around the user, creating a map of obstacles within the environment, and providing simple haptic feedback to the user. The proposed augmented cane system uses the Asus Xtion …
Microstructural Evaluation Of Hydrogen Embrittlement And Successive Recovery In Advanced High Strength Steel, Quentin Scott Allen
Microstructural Evaluation Of Hydrogen Embrittlement And Successive Recovery In Advanced High Strength Steel, Quentin Scott Allen
Theses and Dissertations
Advanced high strength steels (AHSS) have high susceptibility to hydrogen embrittlement, and are often exposed to hydrogen environments in processing. In order to study the embrittlement and recovery of steel, tensile tests were conducted on two different types of AHSS over time after hydrogen charging. Concentration measurements and hydrogen microprinting were carried out at the same time steps to visualize the hydrogen behavior during recovery. The diffusible hydrogen concentration was found to decay exponentially, and equations were found for the two types of steel. Hydrogen concentration decay rates were calculated to be -0.355 /hr in TBF steel, and -0.225 /hr …
Emotional And Cognitive Engagement In Higher Education Classrooms, Kristine C. Manwaring
Emotional And Cognitive Engagement In Higher Education Classrooms, Kristine C. Manwaring
Theses and Dissertations
This is a multi-article format dissertation that explores emotional and cognitive engagement in higher education classrooms. Student engagement in higher education classrooms has been associated with desired outcomes such as academic achievement, retention, and graduation. Student engagement is a multi-faceted concept, consisting of behavioral, emotional, and cognitive components. A deeper understanding of how these components interact would allow instructors and course designers to facilitate more engaging learning experiences for students. The first article is an extended literature review that investigates the extant empirical research on the relationship between emotional and cognitive engagement, and between emotional engagement and academic outcomes in …
Using Dr. Scratch As A Formative Feedback Tool To Assess Computational Thinking, Samuel Frank Browning
Using Dr. Scratch As A Formative Feedback Tool To Assess Computational Thinking, Samuel Frank Browning
Theses and Dissertations
Scratch is one of the most popular ways to teach younger children to code in K–8 throughout the U.S. and Europe. Despite its popularity, Scratch lacks a formative feedback tool to inform students and teachers of a student's progress in coding ability. Dr. Scratch was built to fill this need. This study seeks to answer if using Dr. Scratch as a formative feedback tool accelerates the students' progress in coding ability and Computational Thinking (CT). Forty-one 4th-6th grade students participated in a 1-hour/week Scratch workshop for nine weeks. We measured pre- and posttest results of the Computational Thinking Test (CTt) …
Understanding Community And Ecophysiology Of Plant Species On The Colorado Plateau, Hannah Elizabeth Yokum
Understanding Community And Ecophysiology Of Plant Species On The Colorado Plateau, Hannah Elizabeth Yokum
Theses and Dissertations
The intensification of aridity due to anthropogenic climate change is likely to have a large impact on the growth and survival of plant species in the southwestern U.S. where species are already vulnerable to high temperatures and limited precipitation. Global climate change impacts plants through a rising temperature effect, CO2 effect, and land management. In order to forecast the impacts of global climate change, it is necessary to know the current conditions and create a baseline for future comparisons and to understand the factors and players that will affect what happens in the future. The objective of Chapter 1 is …
A Comparative Literature Review Of Intelligent Tutoring Systems From 1990-2015, Brice Robert Colby
A Comparative Literature Review Of Intelligent Tutoring Systems From 1990-2015, Brice Robert Colby
Theses and Dissertations
This paper sought to accomplish three goals. First, it provided a systematic, comparative review of several intelligent tutoring systems (ITS). Second, it summarized problems and solutions presented and solved by developers of ITS by consolidating the knowledge of the field into a single review. Third, it provided a unified language from which ITS can be reviewed and understood in the same context. The findings of this review centered on the 5-Component Framework. The first component, the domain model, showed that most ITS are focused on science, technology, and mathematics. Within these fields, ITS generally have mastery learning as the desired …
Effects Of Teacher Praise And Reprimand Rates On Classroom Engagement And Disruptions Of Elementary Students At Risk For Emotional And Behavioral Disorders, Kade Rolan Downs
Effects Of Teacher Praise And Reprimand Rates On Classroom Engagement And Disruptions Of Elementary Students At Risk For Emotional And Behavioral Disorders, Kade Rolan Downs
Theses and Dissertations
In the United States educators often feel underprepared to manage student behavior in the classroom, which management is crucial for students with or at risk for Emotional and Behavioral Disorders (EBD) to learn effectively. Research on School-wide Positive Behavior Support (SWPBS) programs has reflected how effective simple principles, such as increasing teacher praise and decreasing teacher reprimands, can be. The current study is a secondary analysis of data originally gathered from 65 teachers and 239 students across three states. Results of these analyses bring principles of effective SWPBS programs and educator needs together by identifying how teacher behaviors correlated with …
Association Between Latent Toxoplasma Gondii Infection And Alzheimer's Disease, Cynthia Elizabeth Wyman
Association Between Latent Toxoplasma Gondii Infection And Alzheimer's Disease, Cynthia Elizabeth Wyman
Theses and Dissertations
Introduction: Many studies have found an association between Toxoplasma gondii seropositivity and behavioral and cognitive changes in animal models and in humans. In addition, early findings have suggested an association between T. gondii seropositivity and Alzheimer's disease (AD). We sought to determine whether there is an association between T. gondii seropositivity and AD as well as cognitive functioning (including memory, working memory, processing speed, language functioning, executive functioning) in a large, well-characterized sample of subjects with AD and matched controls without dementia. Method: Using ELISA assays, we determined anti-T. gondii IgG antibody titers in 114 control subjects and in 105 …
An Analysis Of The Size And Impact Of Digital Footprints, Whitney Nielsen Maxwell
An Analysis Of The Size And Impact Of Digital Footprints, Whitney Nielsen Maxwell
Theses and Dissertations
Personal information available online is known as a digital footprint. While many have a digital footprint, few if any, know what it encapsulates or how to control it. Technology and personal information are becoming more intertwined as technology becomes more integrated with everyday activities. Personal information can be defined as details that apply to a person such as race or shopping habits. Shopping habits are considered personal information by many corporations who spend money to track, or even predict purchases of individuals, whereas more traditional forms of personal information are details like gender, birthdate, and home town. With a wide …
Influence Of Epstein-Barr Virus On Systemic Lupus Erythematosus Disease Development And The Role Of Depression On Disease Progression, Caleb Cornaby
Influence Of Epstein-Barr Virus On Systemic Lupus Erythematosus Disease Development And The Role Of Depression On Disease Progression, Caleb Cornaby
Theses and Dissertations
Systemic Lupus Erythematosus (SLE) is an autoimmune disease affecting 20 to 250 individuals per 100,000 worldwide. Symptomology includes dermatological manifestations such as discoid lesions, acute cutaneous rashes, and oral and nasal ulcers, along with musculoskeletal, pulmonary, and renal complications. Abnormal T and B lymphocyte function and apoptosis, immune complex clearance, complement function, and nucleosome processing are typical of disease pathophysiology. SLE is the result of both environmental and genetic factors, which together create the conditions leading to disease onset and progression. Of these environmental factors, Epstein-Barr virus (EBV) infection is known to cause the genesis of cross-reactive antibodies in SLE …
Relative Navigation Of Micro Air Vehicles In Gps-Degraded Environments, David Orton Wheeler
Relative Navigation Of Micro Air Vehicles In Gps-Degraded Environments, David Orton Wheeler
Theses and Dissertations
Most micro air vehicles rely heavily on reliable GPS measurements for proper estimation and control, and therefore struggle in GPS-degraded environments. When GPS is not available, the global position and heading of the vehicle is unobservable. This dissertation establishes the theoretical and practical advantages of a relative navigation framework for MAV navigation in GPS-degraded environments. This dissertation explores how the consistency, accuracy, and stability of current navigation approaches degrade during prolonged GPS dropout and in the presence of heading uncertainty. Relative navigation (RN) is presented as an alternative approach that maintains observability by working with respect to a local coordinate …