Digital Commons Network^™

Application Of The Entropy Concept To Thermodynamics And Life Sciences: Evolution Parallels Thermodynamics, Cellulose Hydrolysis Thermodynamics, And Ordered And Disordered Vacancies Thermodynamics, Marko Popovic

Theses and Dissertations

Entropy, first introduced in thermodynamics, is used in a wide range of fields. Chapter 1 discusses some important theoretical and practical aspects of entropy: what is entropy, is it subjective or objective, and how to properly apply it to living organisms. Chapter 2 presents applications of entropy to evolution. Chapter 3 shows how cellulosic biofuel production can be improved. Chapter 4 shows how lattice vacancies influence the thermodynamic properties of materials. To determine the nature of thermodynamic entropy, Chapters 1 and 2 describe the roots, the conceptual history of entropy, as well as its path of development and application. From …

Art To Engineering: Curved Folding And Developable Surfaces In Mechanism And Deployable Structure Design, Todd G. Nelson

Theses and Dissertations

This work investigates how curved-crease origami and the developable surfaces which compose it can be transitioned to engineering design. Methods for creating flexible, tailorable-property surfaces that function as thick panels in place of paper are presented. Concepts from curved-crease origami and developable surfaces that can describe and extend engineering applications are discussed and demonstrated. These concepts are particularly beneficial to applications where curved surfaces are integral to the function, deployability is desired, and planar manufacturing could be beneficial.The first part of this work uses arrays of compliant elements to create flexible-tailorable property surfaces. The key feature to these arrays is …

Stack The Deck: An Intervention For Regulating Verbal Participation In Students With Autism Spectrum Disorder, Katherine Ensign Montgomery

Theses and Dissertations

Some students with autism spectrum disorder (ASD) struggle with social reciprocity, or the ability to engage in chains of back-and-forth conversation, interfering with other students' ability to respond to a question that is posed by the teacher in classrooms. The participants were 11 fifth grade students with autism spectrum disorder. We used a simple differential reinforcement intervention within a token system in direct instruction sessions for math to help balance the participation in a class of children with ASD as well as lower the number of talk-outs made by all students. Using a single-subject design, data were analyzed for changes …

Development Of Affinity Monoliths In 3d Printed Microfluidic Devices For Extraction Of Preterm Birth Biomarkers, Ellen Kelsey Parker

Theses and Dissertations

Preterm birth (PTB) is defined as birth before the 37th week of pregnancy and affects 15 million infants per year. Presently, there is no clinical test to determine PTB risk. A 3D printed microfluidic device is being developed as a clinical test for PTB risk via detection of a panel of biomarkers. A significant step is extraction of the PTB biomarkers from blood serum. In this work, I developed 3D printed microfluidic devices in which monoliths can be polymerized. Using the monolith as a solid support to attach antibody, I show that ferritin, one of the PTB biomarkers, can be …

Probabilistic Programming For Theory Of Mind For Autonomous Decision Making, Iris Rubi Seaman

Theses and Dissertations

As autonomous agents (such as unmanned aerial vehicles, or UAVs) become more ubiquitous, they are being used for increasingly complex tasks. Eventually, they will have to reason about the mental state of other agents, including those agents' beliefs, desires and goals – so-called Theory of Mind – and make decisions based on that reasoning. We describe increasingly complex theory of mind models of a UAV pursuing an intruder, and show that (1) there is a natural Bayesian formulation to reasoning about the uncertainty inherent in our estimate of another agent's mental state, and that (2) probabilistic programming is a natural …

Estimating The Reliability Of Scores From A Social Network Survey Questionnaire In Light Of Actor, Alter, And Dyad Clustering Effects, Timothy Dean Walker

Theses and Dissertations

Survey instruments utilized to quantify relationships, or aspects of relationships, may introduce multiple sources of nonindependence"”clustered variance"”into scores, including from actor, alter and dyadic sources. Estimating the magnitude of actor, alter and dyad nonindependence and their impact on the reliability of scores is an important step towards assuring quality data. Multilevel confirmatory factor analysis and the social relations model offer methods for quantifying the influence and estimating the reliability of multiple sources of clustered variance. The use of these methods is illustrated in the analysis of data gathered via a survey designed to quantify relational embeddedness in social network analyses.

Mercury And Dissolved Organic Matter Dynamics During Snowmelt In A Montane Watershed, Provo River, Utah., Brian Noel Packer

Theses and Dissertations

Mercury (Hg) transport in streams is typically facilitated by dissolved organic matter (DOM), however, the dynamics of Hg and DOM during snowmelt in montane watersheds are poorly understood. Hg transport during snowmelt is widely recognized as a significant source of Hg to downstream lakes and reservoirs, such as Jordanelle Reservoir where fish consumption advisories are in effect due to elevated Hg concentrations in certain species of fish. For this study, total mercury (THg), methylmercury (MeHg), and DOM samples were collected at three sites in the upper Provo River, northern Utah, during the 2016 and 2017 water years. To evaluate Hg …

Self-Regulation, Threat Perception, And Inhibitory Control: An Fmri Investigation Of Children With Adhd, Erin Kaseda

Undergraduate Honors Theses

This thesis examines the role of perceived parental support on adolescents aged 12-19 who have been diagnosed with attention-deficit/hyperactivity disorder (ADHD). Specifically, the study focused on inhibitory control, one form of cognitive executive control often implicated in ADHD, in three ways: first, through the use of a Go/No-Go task during a functional MRI scan of the brain; second, through the use of a neuropsychological cognitive battery using the NIH Toolbox; and third, through a qualitative interview that examined self-control in school and home contexts. Contrary to the initial hypothesis, parental support was found to be negatively correlated with inhibitory control …

The Relationship Between Urban Tree Lai And Urban Heat, Amanda Sheepherd, Dr. Ryan Jensen

Journal of Undergraduate Research

It is well known that urban areas are warmer than the surrounding rural areas, with various negative (though sometimes not immediately perceived) consequences for urban residents and the environment. As the world’s human population becomes increasingly urban, methods of mitigating urban heat become more imperative to explore. Though not nearly as abundant as in many natural environments, trees are fairly common in urban areas and can be utilized to offset urban heat. Studying the cooling effects of trees on the surrounding areas can further our understanding of the relationship between trees and temperature. Leaf Area Index (LAI) is a specific …

Patterns Of The Past: Mountain Hemlock And Pacific Northwest Climate, Aaron Snow, Dr. Matthew Bekker

Journal of Undergraduate Research

In July, 2016, I had the opportunity to attend the North American Dendroecological Fieldweek (NADEF) at Mount Rainier National Park, Washington. NADEF organizes the attendees into five different groups to undergo specific research projects all having to do with tree rings. My group, the intro group, hiked to the southern side of the park, assembled a chronology of mountain hemlock trees (Tsuga mertensiana), and observed notable attributes of the collected data. Because the fieldweek lasted only seven days, our research was minimal, which was why I applied for an ORCA grant in order to take the research to …

Impact Of Antenna Mutual Coupling, Propagation, And Nonreciprocity On Propagation-Based Key Establishment, Attiya Mahmood

Theses and Dissertations

Propagation-based key establishment is a physical layer method for generating encryption keys based on two radios observing a reciprocal propagation channel. This work explores the impact of mutual coupling when communicating nodes are equipped with multiple antennas, multipath richness in the propagation environment, and practical limitations caused by the nonreciprocal nature of RF circuits on key establishment. First, network theory is used to formulate a model of a realistic communication system which incorporates transmit sources and receive loads, impedance matching networks, low-noise amplifiers (LNAs), mutually coupled antenna arrays, and a passive eavesdropper. Afterwards, a detailed analysis is performed to quantify …

Constraining Kura And South Caspian Basin Maikop Source Rock Stratigraphy, Deposition, And Timing Using Chemostratigraphy Of Redox-Sensitive Metals And Re-Os Geochronology, Alex M. Washburn

Theses and Dissertations

The Oligocene-Miocene Maikop Series in the South Caspian and Kura Basins is the key petroleum source rock for both offshore and onshore petroleum development in Azerbaijan. The Maikop is a thick (up to 3 km) succession of silty mudstones containing up to 15% total organic carbon (TOC), but is greatly lacking diagnostic microfaunal assemblages useful for dating and stratigraphically constraining the deposition of the mudstone. Current stratigraphic constraints relying on microfaunal assemblages, radiostratigraphy, and chemostratigraphy are robust, but key information is still missing. This study adds numerical age data to Maikop stratigraphy through Re-Os geochronology. Of five sample suites analyzed …

Applying Attribute-Based Encryption In Two-Way Radio Talk Groups: A Feasibility Study, Michael Andreas Gough

Theses and Dissertations

In two-way radio systems, talk groups are used to organize communication. Some situations may call for creating a temporary talk group, but there are no straightforward ways to do this. Making a new talk group requires programming radios off-line. Temporary groups can be created, but this requires inputting radio IDs which is tedious on a radio's limited controls. By describing group members using attributes, ciphertext-policy attribute-based encryption (CP-ABE) can be used to quickly create sub-groups of a talk group. This scheme requires fewer button presses and messages sent in the new talk group are kept secret. CP-ABE can be used …

Addressing The Regulator's Dilemma: A Self Drive Framework For Balancing Safety And Innovation, Craig Maughan

Brigham Young University Prelaw Review

Policymakers are tasked with creating regulations that responsibly oversee the growth and deployment of emerging technologies. I argue that the SELF DRIVE Act, currently being deliberated in Congress, offers one such intelligent regulatory structure for autonomous vehicles: it prioritizes public safety over adherence to outdated requirements, giving innovators greater freedom to field-test new designs. More importantly, I examine how key principles of the SELF DRIVE Act should be applied to other emerging technologies currently facing regulatory roadblock. Specifically, I suggest the drone industry be subject to regulatory changes that incentivize safety, allow exploration, and anticipate future growth. Such regulations allow …

The Influence Of Foreign-Born Population On Immigrants' Academic Achievement: A Multilevel Analysis Of Students In High-Income Countries, Florencia Silveira

Theses and Dissertations

Scholars have linked multiple background characteristics to academic achievement; among these are student SES and race/ethnicity. A largely understudied student characteristic in relation to academic achievement is student immigrant status. I contextualize this relationship by considering a macro social setting: country-level foreign-born population. To do this, I examine mathematics achievement from the 2015 PISA assessment in 41 high-income countries. Using mixed-effects modeling, I examine student- and country-level factors and their effects on mathematics achievement. I use within- and cross-level interactions to examine the relationship between 1) immigrant status and student SES and between 2) immigrant status and foreign-born population. To …

It's A Drag: Finding The Divine In Drag Performance, Richard Andrew Curtiss

Theses and Dissertations

For over the thirty years, drag performance has been examined for its utility to subvert or reinforce traditional gender roles. Many of these examinations have focused on performances that emphasize subversion and separated drag into two categories: the progressive drag that subverts, and the regressive drag that reinforces. While this approach has provided a wealth of understanding about drag performance and gender roles, drag can be examined without separating its subverting/reinforcing aspects. If drag is seen as the consideration of a given gender performing the not given gender, then another consideration can be made to the subverting performing the reinforcing. …

End-To-End Full-Page Handwriting Recognition, Curtis Michael Wigington

Theses and Dissertations

Despite decades of research, offline handwriting recognition (HWR) of historical documents remains a challenging problem, which if solved could greatly improve the searchability of online cultural heritage archives. Historical documents are plagued with noise, degradation, ink bleed-through, overlapping strokes, variation in slope and slant of the writing, and inconsistent layouts. Often the documents in a collection have been written by thousands of authors, all of whom have significantly different writing styles. In order to better capture the variations in writing styles we introduce a novel data augmentation technique. This methods achieves state-of-the-art results on modern datasets written in English and …

Adaptive Fluid Simulation Using A Linear Octree Structure, Sean A. Flynn

Theses and Dissertations

An Eulerian approach to fluid flow provides an efficient, stable paradigm for realistic fluid simulation. However, its traditional reliance on a fixed-resolution grid is not ideal for simulations that simultaneously exhibit both large and small-scale fluid phenomena. Octree-based fluid simulation approaches have provided the needed adaptivity, but the inherent weakness of a pointer-based tree structure has limited their effectiveness. We present a linear octree structure that provides a significant runtime speedup using these octree-based simulation algorithms. As memory prices continue to decline, we leverage additional memory when compared to traditional octree structures to provide this improvement. In addition to reducing …

Signal Structure For A Class Of Nonlinear Dynamic Systems, Meilan Jin

Theses and Dissertations

The signal structure is a partial structure representation for dynamic systems. It characterizes the causal relationship between manifest variables and is depicted in a weighted graph, where the weights are dynamic operators. Earlier work has defined signal structure for linear time-invariant systems through dynamical structure function. This thesis focuses on the search for the signal structure of nonlinear systems and proves that the signal structure reduces to the linear definition when the systems are linear. Specifically, this work: (1) Defines the complete computational structure for nonlinear systems. (2) Provides a process to find the complete computational structure given a state …

Subword Spotting And Its Applications, Brian Lafayette Davis

Theses and Dissertations

We propose subword spotting, a generalization of word spotting where the search is for groups of characters within words. We present a method for performing subword spotting based on state-of-the-art word spotting techniques and evaluate its performance at three granularitires (unigrams, bigrams and trigrams) on two datasets.We demonstrate three applications of subword spotting, though others may exist. The first is assisting human transcribers identify unrecognized characters by locating them in other words. The second is searching for suffixes directly in word images (suffix spotting). And the third is computer assisted transcription (semi-automated transcription). We investigate several variations of computer assisted …

Fitting Als Reflectance Data Using Python, R. Steven Turley

Faculty Publications

This article describes how to use the python refl library in https://bitbucket.org/steve_turley/reflectance-fitting to fit thin film reflectance data from the Advanced Light Source (ALS) at Lawrence Berkeley National Labs. It uses data taken for a thin film of aluminum capped by a thin film of aluminum fluoride on a silicon nitride substrate. The single fit in the example shown here shows the importance of taking into account the oxidation of the aluminum layer as part of the fit.

Comparison Of A Prepositioned Areal Electrofishing Device And Fixed Underwater Videography For Sampling Riverine Fishes, Philip R. Branigan, Michael C. Quist, Bradley B. Shepard, Susan C. Ireland

Western North American Naturalist

Prepositioned areal electrofishing devices (PAEDs) are used to evaluate microhabitat use by fishes because they minimize fright biases associated with traditional electrofishing techniques (e.g., boat electrofishing). Similarly, fixed underwater videography (FUV) is commonly used to minimize the effect of observers on fish behavior. The specific objectives of this research were to evaluate estimates of taxonomic occurrence and diversity between PAEDs and FUV and determine an appropriate time interval between positioning and electrifying of a PAED to reduce effects of PAED positioning on fish occurrence. Video cameras were positioned instream at 28 locations on the Kootenai River, Idaho, prior to PAED …

Blockchain: Technical Review, Evan D. Poff

Marriott Student Review

This review of blockchain technology accompanies the article "Strategic Implications of Blockchain."

Strategic Implications Of Blockchain, William R. Adams

Marriott Student Review

This thesis introduces blockchain, the underlying technology of cryptocurrencies such as Bitcoin, and discusses how best to conceptualize it relative to other technologies. Following an explanation of the fundamentals of blockchain, also known as the distributed ledger, I identify the characteristics of the technology. Building upon blockchain’s inherent strengths and limitations, I explore potential business applications of blockchain. Finally, I recommend that leaders continue to track the development and adoption of blockchain technology, even if they decide that implementing it does not align with their organization’s strategy at present.

Executive Spotlight: Jesse Barnes, Highvista Strategies, Victoria Beecroft

Marriott Student Review

No abstract provided.

Buzzwords, Evan D. Poff

Marriott Student Review

This feature will explain the following buzzwords:

• Blockchain
• Cryptocurrency
• Work-Life Integration
• Passive Equities
• Risk-Adjusted Returns

Full Issue: Bridging The Gap (Vol. 2, Issue 1), Marianna Richardson

Marriott Student Review

A bridge brings together two pieces, which normally would not connect. Without the connecting link, those two sections would be separate. For example, a bridge between two landmasses gives travelers access to new locations, new vistas, and possibly even new opportunities. Bridging the gap can also be perilous if the bridge is not safe and secure. The connection needs to be maintained and inspected regularly for cracks, fissures, or signs of wear that should be fixed immediately. In this issue of Marriott Student Review, the authors have explored the bridges built in business and the importance of maintaining those connections.

A Route Less Traveled: Principals’ Perceptions Of Alternative Licensed Cte Teachers, Scott R. Bartholomew, Emma P. Bullock, Louis S. Nadelson

Faculty Publications

The shortage of teachers prepared to teach career and technical education (CTE) courses, or willing to work in certain locations (e.g. inner city, rural), has motivated the desire to explore solutions such as alternative routes to teacher licensure (ARL). Most ARL programs bypass colleges of education and provide a different approach to preparing individuals to teach, leaving many to wonder about the quality and knowledge of these teachers. Specific areas, such as CTE, have seen a large influx of ARL teachers in recent years. We sought to determine school principals’ perceptions of ARL CTE teachers. We found principal support for …

Teacher-Less Teaching: The Efficacy Of Student-Taught Soft Skill Modules, Jacob Brown

Instructional Psychology and Technology Graduate Student Projects

This report presents the results of an implementation evaluation of new modular content for the BYU ACME Soft Skills seminar. The seminar was changed from a teacher-led seminar to a student-facilitated, teacher-less model. Evaluative data was gathered using a mixed methods approach, including in-class observations, surveys, and personal and small group interviews. The new seminar structure was piloted over two semesters in the student teacher facilitated teacher-less format and was met largely positively by students, who reported high engagement and beneficial soft skill development. Students provided suggestions for seminar improvement, such as offering graded credit, integrating the seminar with other …

Occurrence Of Chironomid Species (Diptera: Chironomidae) In The High Se-78 Concentrations And High Ph Of Fountain Creek Watershed, Colorado, Usa, Del Wayne R. Nimmo, Scott J. Herrmann, James E. Sublette, Igor V. Melnykov, Lisa K. Helland, John A. Romine, James S. Carsella, Lynn M. Herrmann-Hoesing, Jason A. Turner, Brian D. Vanden Heuvel

Western North American Naturalist

High selenium (Se) in watersheds can cause detrimental effects to many vertebrate species, but less is known regarding its effects on invertebrates comprising the basis of the food chain. This study addressed the response of a natural community of chironomid (midge) species to Se in 2 high-gradient streams that join to form a sandy-bottom front-range stream known to contain increasing downstream concentrations of Se. We identified a total of 151 species of adult male midges (n = 714) collected in 2007 and 2008 from 14 sites in the Fountain Creek Watershed, Colorado, USA. In the initial analysis, the midge …