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An Iterative Five-Point Algorithm With Application To Multi-Target Tracking, Jacob H. White, Randal W. Beard May 2019

An Iterative Five-Point Algorithm With Application To Multi-Target Tracking, Jacob H. White, Randal W. Beard

Student Works

We present ReSORtSAC: Recursively-seeded optimization, refinement, sample, and consensus. ReSORtSAC is a novel algorithm that can be used to estimate the relative pose between consecutive frames of a video sequence. Relative pose estimation algorithms typically generate a large number of hypotheses from minimum subsets and score them in order to be robust to noise and outliers. The relative pose is often represented using the essential matrix. Previous methods calculate essential matrix hypotheses directly without utilizing prior information. These equations are complex to evaluate and can return up to ten essential matrix solutions for each minimum subset, all of which must …

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The Homography As A State Transformation Between Frames In Visual Multi-Target Tracking, Jacob H. White, Randal W. Beard May 2019

The Homography As A State Transformation Between Frames In Visual Multi-Target Tracking, Jacob H. White, Randal W. Beard

Student Works

There are many applications where an unmanned aerial vehicle (UAV) is required to visually track a ground-based target using an on-board camera. In these applications, successful target tracking often requires that past estimates of the target be transformed into the current image frame so that moving targets can be correctly identified [1]. If the target is moving on an approximately planar surface, then the coordinate transformation can be accomplished using the homography matrix.

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Necessary And Sufficient Conditions On State Transformations That Preserve The Causal Structure Of Lti Dynamical Networks, Chi Ho Leung May 2019

Necessary And Sufficient Conditions On State Transformations That Preserve The Causal Structure Of Lti Dynamical Networks, Chi Ho Leung

Theses and Dissertations

Linear time-invariant (LTI) dynamic networks are described by their dynamical structure function, and generally, they have many possible state space realizations. This work characterizes the necessary and sufficient conditions on a state transformation that preserves the dynamical structure function, thereby generating the entire set of realizations of a given order for a specific dynamic network.

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Noise Control Of Vacuum-Assisted Toilets, Michael Thomas Rose Apr 2019

Noise Control Of Vacuum-Assisted Toilets, Michael Thomas Rose

Theses and Dissertations

Vacuum-assisted toilets make use of a large pressure difference between the ambient pressure and a vacuum tank to transport waste from the toilet bowl to the septic tank. This process requires 98% less water per flush making it an attractive product for transport vehicles such as airplanes, cruise ships, and trains. Unfortunately, the water savings come at the cost of high noise levels. This thesis investigates the acoustic characteristics of a vacuum-assisted toilet flush and several methods to reduce the radiated noise. Some methods include changing rinse parameters such as rinse pressure, rinse length, and rinse timing, adding structural damping …

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Development And Validation Of A Vibration-Based Sound Power Measurement Method, Cameron Bennion Jones Apr 2019

Development And Validation Of A Vibration-Based Sound Power Measurement Method, Cameron Bennion Jones

Theses and Dissertations

The International Organization for Standardization (ISO) provides no vibration-based sound power measurement standard that provides Precision (Grade 1) results. Current standards that provide Precision (Grade 1) results require known acoustic environments or complex setups. This thesis details the Vibration Based Radiation Mode (VBRM) method as one approach that could potentially be used to develop a Precision (Grade 1) standard. The VBRM method uses measured surface velocities of a structure and combines them with the radiation resistance matrix to calculate sound power. In this thesis the VBRM method is used to measure the sound power of a single-plate and multiple plate …

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A Crispr/Cas9 Tissue Specific Forward Genetic Screening Method In Danio Rerio, Joshua Don Yates Apr 2019

A Crispr/Cas9 Tissue Specific Forward Genetic Screening Method In Danio Rerio, Joshua Don Yates

Theses and Dissertations

Many of the cutting-edge innovations on the CRISPR/Cas9 system involve the use of complex sgRNA libraries. For example, such libraries have recently been used in functional genomics applications to screen for specific genes in both cell lines and living organisms, as well as in subcellular imaging to fluorescently label chromatin in living cells. However, chemically synthesizing customized libraries can be cost prohibitive, requires precise genomic information, and can takes several weeks. We developed a rapid and efficient enzymatic method to generate sgRNA libraries from arbitrary DNA substrates, significantly reducing the cost of library generation. A type IIS restriction enzyme binding …

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Polynesian Civilization And The Future Colonization Of Space, John Grayzel Apr 2019

Polynesian Civilization And The Future Colonization Of Space, John Grayzel

Comparative Civilizations Review

Polynesian civilization was configured—prior to Western colonization—in ways similar to that sometimes described as necessary for humanity's interstellar migration into space. Over thousands of years and miles, across open ocean, a core population expanded to settle on hundreds of scattered islands, while maintaining shared identity, continued awareness and repetitive contact with each other. Key to their expansion was their development of robust ocean-going vessels and their extraordinary abilities to navigate across vast expanses of open water. The first half of the 1800s saw a surge in contacts between Polynesia and western missionaries and whalers, followed by significant depopulation due to …

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Using Symmetry To Accelerate Materials Discovery, Wiley Spencer Morgan Apr 2019

Using Symmetry To Accelerate Materials Discovery, Wiley Spencer Morgan

Theses and Dissertations

Computational methods are commonly used by materials scientists to make predictions about materials. These methods can achieve in hours what would take days or weeks to accomplish in a lab. However, there are limits to what computational methods can do and how accurate the predictions are.A limiting factor for computational materials science is the size of the search space. The space of potential materials is infinite. Selecting specific systems of elements on a fixed lattice to study reduces the number of possible arrangements of atoms in the lattice to a finite number. However, this number can still be very large. …

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Design And Synthesis Of Ceragenins–Cationic Steroid Antimicrobial Compounds, Structural Improvement And Synthesis Of Cyclopentenone Prostaglandins And Modification And Synthesis Of Derivatives Of Ribityllumazines: Potential Antigens For Activation Of Mait Cells, Yubo Li Apr 2019

Design And Synthesis Of Ceragenins–Cationic Steroid Antimicrobial Compounds, Structural Improvement And Synthesis Of Cyclopentenone Prostaglandins And Modification And Synthesis Of Derivatives Of Ribityllumazines: Potential Antigens For Activation Of Mait Cells, Yubo Li

Theses and Dissertations

Antimicrobial peptides (AMPs) are ubiquitous and display broad-spectrum antimicrobial activity that can control bacterial colonization of surfaces. Ceragenins are small-molecule mimics of AMPs and have several advantages over AMPs, including cost of manufacture and stability. A ceragenin, CSA-120, modified with an acrylamide group was directly incorporated into fluoropolymer coatings as a means of inhibiting bacterial biofilm formation. The ceragenin-containing coatings displayed improved performance. By conjugating a copper chelating group to the ceragenin, chelation of 64Cu by the conjugate was effective and provided a stable complex that allowed in vivo imaging. This conjugate may provide a means of identifying infection sites …

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Deciphering The Transport Of Elastic Filaments By Antagonistic Motor Proteins, Stephanie Portet, Cecil Leduc, Sandrine Etienne-Manneville, J. C. Dallon Apr 2019

Deciphering The Transport Of Elastic Filaments By Antagonistic Motor Proteins, Stephanie Portet, Cecil Leduc, Sandrine Etienne-Manneville, J. C. Dallon

Faculty Publications

Intermediate filaments are long elastic fibres that are transported by microtubule-associated motor proteins kinesin and dynein inside the cell. How elastic filaments are efficiently transported by antagonistic motors is not well understood and difficult to measure with current experimental techniques. Adapting the tug-of-war paradigm for vesicle-like cargos, we develop a mathematical model to describe the motion of an elastic filament punctually bound to antagonistic motors. As observed in cells, up to 3 modes of transport are obtained; dynein-driven retrograde, kinesin-driven anterograde fast motions and a slow motion. Motor properties and initial conditions that depend on intracellular context, regulate the transport …

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Robinson, Chase F. Islamic Civilization In Thirty Lives. University Of California Press, 2016, Norman C. Rothman Apr 2019

Robinson, Chase F. Islamic Civilization In Thirty Lives. University Of California Press, 2016, Norman C. Rothman

Comparative Civilizations Review

No abstract provided.

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Comparative Civilizations Review No. 80 Full Issue, Comparative Civilizations Review Apr 2019

Comparative Civilizations Review No. 80 Full Issue, Comparative Civilizations Review

Comparative Civilizations Review

No abstract provided.

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Comparing Academic Vocabulary List (Avl) Frequency Bands To Leveled Biology And History Texts, Lynne Crandall Apr 2019

Comparing Academic Vocabulary List (Avl) Frequency Bands To Leveled Biology And History Texts, Lynne Crandall

Theses and Dissertations

For decades, teachers and language learners have been concerned about matching the difficulty level of texts to the proficiency level of learners in order to achieve comprehensible input, which leads to effective learning. Some leveling systems and research use word lists as part of their leveling processes, particularly the Academic Word List. The Academic Vocabulary List (AVL) has not been explored yet as a leveling tool, so this study aims to address this lack of research by examining how the AVL words vary in cumulative frequency bands and also in separate frequency bands with regard to level and topic. The …

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Major Decisions: Religious Women And Their Perceptions Of Women In Stem Majors, Mandy Lou Pershing Apr 2019

Major Decisions: Religious Women And Their Perceptions Of Women In Stem Majors, Mandy Lou Pershing

Theses and Dissertations

Women still lack representation in many Science, Technology, Engineering, and Math (STEM) fields, particularly those with high earning potential. Past studies on women who study STEM have failed to acknowledge the impact of religious values on choice of major among women. Using data collected at a religiously-affiliated university in 2013, this study explores how 24 religious women made decisions about majoring in STEM fields. The results from this sample closely follow the literature review, while also adding many new layers to understanding how religious women make decisions about STEM. Themes identified using this approach are useful for designing future studies …

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Self-Determination Theory And Student Emotional Engagement In Higher Education, Tarah Brittany Ikahihifo Apr 2019

Self-Determination Theory And Student Emotional Engagement In Higher Education, Tarah Brittany Ikahihifo

Theses and Dissertations

Studies have shown that increased student engagement is correlated with improved learning outcomes and overall positive results for students. While engagement can be viewed as a precursor to other outcomes, it should also be examined as an outcome itself. To increase student engagement and improve the learning experience for students, we must understand which factors can facilitate engagement and how educators can positively affect these factors. This research explored the influence of three proposed facilitators of engagement: autonomy, competence, and relatedness. Self-determination theory, a theory of motivation, posits that these are three innate psychological needs that must be fulfilled to …

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How Does The Artist Teacher Successfully Negotiate Being Both Artist And Teacher?, Marie Withers Apr 2019

How Does The Artist Teacher Successfully Negotiate Being Both Artist And Teacher?, Marie Withers

Theses and Dissertations

Around water coolers, faculty rooms, and classroom corners, art teachers discuss their concerns about maintaining a balance between making, teaching, and studying art. Research indicates there are advantages and disadvantages to commingling these activities, and about how these activities inform each other. The purpose of this study is to not only research what has been written, but also discover through interviews, using a narrative inquiry/case study approach, what living, breathing artist teachers are doing to that allows them to take advantage of the symbiotic nature of making, teaching, and studying art.

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Deep Learning For Document Image Analysis, Christopher Alan Tensmeyer Apr 2019

Deep Learning For Document Image Analysis, Christopher Alan Tensmeyer

Theses and Dissertations

Automatic machine understanding of documents from image inputs enables many applications in modern document workflows, digital archives of historical documents, and general machine intelligence, among others. Together, the techniques for understanding document images comprise the field of Document Image Analysis (DIA). Within DIA, the research community has identified several sub-problems, such as page segmentation and Optical Character Recognition (OCR). As the field has matured, there has been a trend of moving away from heuristic-based methods, designed for particular tasks and domains of documents, and moving towards machine learning methods that learn to solve tasks from examples of input/output pairs. Within …

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Surrealism And Postmodernism In Gregory Abbott's Remlack Too, Elizabeth Helen Donakey Apr 2019

Surrealism And Postmodernism In Gregory Abbott's Remlack Too, Elizabeth Helen Donakey

Theses and Dissertations

This thesis explores Gregory Abbott's Remlack Too, particularly in its fusion of surrealism and postmodernism. It addresses the ways in which Remlack Too highlights the artist's experience with sleep apnea, but acknowledges that this is only one level of understanding the painting. Other layers are realized through a study of surrealism and postmodernism. This research analyzes the ways in which surrealism and postmodernism work together, including through their lack of style, fluidity in definition, incorporation of semiotics, distrust in science, reliance on psychoanalysis, and especially through postmodernism's appropriating of earlier artistic movements. This thesis reviews the previously overlooked elements of …

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Connecting The Dots: The Ontology And Ethics Of Intersubjectivity In Borges’S “The Writing Of The God”, Brendan Kurt Lund Apr 2019

Connecting The Dots: The Ontology And Ethics Of Intersubjectivity In Borges’S “The Writing Of The God”, Brendan Kurt Lund

Theses and Dissertations

How do we establish objectivity when each person’s perspective is uniquely subjective? Borges’s “The Writing of the God” shows how an epistemically isolated subject is incapable of ever arriving at a robust sense of objectivity without reference to an Other. Donald Davidson’s theory of interpretive triangulation posits that the Other’s external perspective establishes objectivity by making the subject aware of the limits of his or her perception. Emmanuel Levinas suggests that the face of the Other establishes ethics as first philosophy through a primordial, affective discourse. The ethical relation is what undergirds the questions of epistemology which Davidson addresses.

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Modeling Subglottic Stenosis Effects On Phonation Threshold Flow In The Porcine Larynx, Robin Michelle Smith Apr 2019

Modeling Subglottic Stenosis Effects On Phonation Threshold Flow In The Porcine Larynx, Robin Michelle Smith

Theses and Dissertations

Subglottic stenosis (SGS) is an abnormal narrowing of the airway at the level of the cricoid cartilage, above the first tracheal ring and immediately beneath the vocal folds. Individuals with SGS experience a reduction in their ability to breathe as well as adverse effects on voice function. SGS can result from a variety of causes with the type of treatment depending on stenosis severity. Surgical techniques such as laryngotracheal and cricotracheal reconstruction are beneficial for airway maintenance; however, these procedures have resulted in negative effects on voice production. On the other hand, there are patients with SGS who do not …

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Machine Learning Methods For Nanophotonic Design, Simulation, And Operation, Alec Michael Hammond Apr 2019

Machine Learning Methods For Nanophotonic Design, Simulation, And Operation, Alec Michael Hammond

Theses and Dissertations

Interest in nanophotonics continues to grow as integrated optics provides an affordable platform for areas like telecommunications, quantum information processing, and biosensing. Designing and characterizing integrated photonics components and circuits, however, remains a major bottleneck. This is especially true when complex circuits or devices are required to study a particular phenomenon.To address this challenge, this work develops and experimentally validates a novel machine learning design framework for nanophotonic devices that is both practical and intuitive. As case studies, artificial neural networks are trained to model strip waveguides, integrated chirped Bragg gratings, and microring resonators using a small number of simple …

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Representation And Reconstruction Of Linear, Time-Invariant Networks, Nathan Scott Woodbury Apr 2019

Representation And Reconstruction Of Linear, Time-Invariant Networks, Nathan Scott Woodbury

Theses and Dissertations

Network reconstruction is the process of recovering a unique structured representation of some dynamic system using input-output data and some additional knowledge about the structure of the system. Many network reconstruction algorithms have been proposed in recent years, most dealing with the reconstruction of strictly proper networks (i.e., networks that require delays in all dynamics between measured variables). However, no reconstruction technique presently exists capable of recovering both the structure and dynamics of networks where links are proper (delays in dynamics are not required) and not necessarily strictly proper.The ultimate objective of this dissertation is to develop algorithms capable of …

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Statistical Analysis And Extraction Of Quantitative Data From Elliptical-Signal-Model Bssfp Mri, Meredith Ireene Dupaix Taylor Apr 2019

Statistical Analysis And Extraction Of Quantitative Data From Elliptical-Signal-Model Bssfp Mri, Meredith Ireene Dupaix Taylor

Theses and Dissertations

Osteoarthritis is the most common type of arthritis, and is characterized by the loss of articular cartilage in a joint. This eventually leads to painful bone on bone interactions. Since the loss of cartilage is permanent, the main treatment for this disease is pain management until a full joint replacement is needed. To test new potential treatments a consistent way to measure cartilage thickness is needed. The current standard used in the knee to represent cartilage uses joint space width measured from x-rays. This measurement is highly variable, and does not directly show cartilage. Unlike x-rays, magnetic resonance imaging (MRI) …

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Multi-Instrument Surface Characterization Of Display Glass, Cody Vic Cushman Apr 2019

Multi-Instrument Surface Characterization Of Display Glass, Cody Vic Cushman

Theses and Dissertations

Flat panel displays (FPDs) are microfabricated devices that are often fabricated on specialized glass substrates known as display glass. The surface chemistry of the outer few nanometers of display glass can have an important influence on FPD performance and yield. Dsiplay glass surface characterization is difficult because (i) display glass surface composition varies significantly from its bulk composition; (ii) high-surface area forms of glass, such as fibers and powders, may not have the same surface composition as melt-formed planar surfaces, and (iii) the surface composition of display glass may be altered through exposure to chemical treatments commonly used during flat …

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Antibacterial And Antifungal Activity Of Ceragenins, Mimics Of Endogenous Antimicrobial Peptides, Marjan Mohammadihashemi Apr 2019

Antibacterial And Antifungal Activity Of Ceragenins, Mimics Of Endogenous Antimicrobial Peptides, Marjan Mohammadihashemi

Theses and Dissertations

The continuous emergence of drug-resistance pathogens is a global concern. As a result, substantial effort is being expended to develop new therapeutics and mechanisms for controlling microbial growth to avoid entering a "post-antibiotic" era in which commonly used antibiotics are no longer effective in treating infections. In this work, we investigate the efficacy and application of ceragenins as non-peptide mimics of antimicrobial peptides (AMPs). First, this work examines the susceptibility of drug-resistant Gram-negative bacteria. The susceptibility of colistin-resistant clinical isolates of Klebsiella pneumoniae to ceragenins and AMPs suggests that there is little to no cross-resistance between colistin and ceragenins/AMPs. Furthermore, …

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Moderating Influence As A Design Principle For Human-Swarm Interaction, C Chace Ashcraft Apr 2019

Moderating Influence As A Design Principle For Human-Swarm Interaction, C Chace Ashcraft

Theses and Dissertations

Robot swarms have recently become of interest in both industry and academia for their potential to perform various difficult or dangerous tasks efficiently. As real robot swarms become more of a possibility, many desire swarms to be controlled or directed by a human, which raises questions regarding how that should be done. Part of the challenge of human-swarm interaction is the difficulty of understanding swarm state and how to drive the swarm to produce emergent behaviors. Human input could inhibit desirable swarm behaviors if their input is poor and has sufficient influence over swarm agents, affecting its overall performance. Thus, …

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“They Must Suffer Even As I”: Misconceptions Concerning Personal Payment For Sin, Christopher J. Porter Apr 2019

“They Must Suffer Even As I”: Misconceptions Concerning Personal Payment For Sin, Christopher J. Porter

Religious Educator: Perspectives on the Restored Gospel

Soon after I was called to serve as the elders quorum president of a young single adult ward many years ago, the stake president gave me the difficult challenge to visit each quorum member individually during the upcoming school year. To this day, I remember one such visit to a young man I’ll call Robert. It was evident when I arrived that something was troubling him; his gaze alternated nervously between the floor and his visitor but gave preference to the floor. At the outset of our conversation, he was reticent and guarded, but at my prodding he began to …

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Skeletal Muscle Recovery And Vibration, Garrett Collier Jones Apr 2019

Skeletal Muscle Recovery And Vibration, Garrett Collier Jones

Theses and Dissertations

In the past decade there has been a significant increase in focus on the effect upper body vibration (UBV) has on the recovery of skeletal muscle after exercise-induced muscle damage. Recovery can be defined and investigated using a wide variety of methods. This study used three different measurements to track muscle recovery over 7 days following an exercise muscle damage protocol and applied vibration to a mathematical model. A visual analog scale (VAS) was used to measure muscle pain, a strain gauge was used to obtain maximum voluntary isometric contraction (MVIC) strength measurements, and shear wave elastography (SWE) represented muscle …

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Exploring Fit For Nonlinear Structural Equation Models, Phillip Isaac Pfleger Apr 2019

Exploring Fit For Nonlinear Structural Equation Models, Phillip Isaac Pfleger

Theses and Dissertations

Fit indices and fit measures commonly used to determine the accuracy and desirability of structural equation models are expected to be insensitive to nonlinearity in the data. This includes measures as ubiquitous as the CFI, TLI, RMSEA, SRMR, AIC, and BIC. Despite this, some software will report these measures when certain models are used. Consequently, some researchers may be led to use these fit measures without realizing the impropriety of the act. Alternative fit measures have been proposed, but these measures require further testing. As part of this thesis, a large simulation study was carried out to investigate alternative fit …

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The Investigation Of Nickel-Based Catalysts For The Oxidative Dehydrogenation Of Ethane, Justin Lane Park Apr 2019

The Investigation Of Nickel-Based Catalysts For The Oxidative Dehydrogenation Of Ethane, Justin Lane Park

Theses and Dissertations

The Investigation of Nickel-Based Catalysts for the Oxidative Dehydrogenation of Ethane Justin Lane ParkDepartment of Chemistry & Biochemistry, BYU Doctor of Philosophy Chemistry The advancement of creating ethylene from ethane via oxidative dehydrogenation (ODH) rather than the traditional direct dehydrogenation is right on the cusp of commercialization. The oxidative pathway provides a novel route that reduces the operating temperature of this reaction by 400-500°C. A variety of metals including Mo, V, and Ni that have redox properties suitable for the partial oxidation of small chain alkanes have been investigated. Currently, a MoVNbTe oxide is the most promising catalyst but it …

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