Digital Commons Network^™

Establishing A Kinetic Assessment Of Reactive Strength, Talin Louder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three neuromuscular characteristics are identified in Sheppard and Young’s model of agility: concentric strength and power, bilateral symmetry, and reactive strength. Measures of reactive strength attempt to model the neuromuscular regulation of tissue stress and strain. The Coefficient of Reactivity (CoR) is the first known assessment of neuromuscular reactivity. The CoR was developed as an assessment of neuromuscular performance in drop jumping. The construct validity of the CoR was placed in question when Warren Young proposed the Reactive Strength Index (RSI). The RSI improved the theoretical validity of reactive strength assessment since it included a component measure (ground contact time) …

Do Data Structures Matter? A Simulation Study For Testing The Validity Of Age-Period-Cohort Models, Sun Young Jeon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Age, period, and cohort are three temporal dimensions that can make unique contributions to social and epidemiological changes that occur in populations over time. However, while the theoretical underpinnings for each temporal dimension are well established, the statistical techniques to assess the distinctive contributions of age, period and cohort are controversial. Unless questionable assumptions are imposed on the data, traditional linear regression models are incapable of estimating the independent contribution of each temporal dimension due to the linear dependence between age, period and cohort (A=P-C). Two recently developed methods, Hierarchical Age-Period-Cohort (HAPC) and Intrinsic Estimator (IE) models, enable researchers to …

Evaluation Of Multiple Exemplar Training Plus Discrimination Training On Promoting Generalization Of Response Variability, Bethany P. Contreras

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Typically developing children learn from play. For example, play serves as a foundation for children to acquire early language and social skills. Children with autism tend to have deficits in play, and often engage in rigid or repetitive behaviors during play. Such rigid play behavior can limit opportunities for these children to learn from play. Researchers have shown that it is possible to increase the variety of play behaviors that children with autism engage in. But, research has not yet shown whether these gains in play behavior will transfer to other play environments and situations. Therefore, the purpose of this …

Beam Steerable Reconfigurable Antenna With Smart Rf Switching On 3d Parasitic Level, Mohammad Ababil Hossain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Traditional antennas have a lot of limitations as their performance is usually fixed by their initial geometry. On the other hand, modern communication systems are getting way to complicated compared to their earlier counterparts. This necessitates some special types of smart or reconfigurable antennas, which can dynamically adapt to the requirements of the communication systems more effectively. Using conventional single functional antennas is therefore not an efficient approach in these sort of communication systems. Considering all these factors, in this thesis, a beam steerable reconfigurable antenna system is presented that can yield the radiation patterns of multiple antennas with a …

The Development Of English Learners As Writers Of Opinion Pieces, Auri Ann Squire

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The population of English learners (ELs) is growing rapidly across the U.S. Concurrently, elementary students throughout the country are being required to produce more sophisticated writing products than ever before as a result of the heavy emphasis on writing instruction in the recently adopted Common Core State Standards. This qualitative study examined how to best support ELs as they develop as writers. It also addressed the strong need to investigate the impact of students discussing ideas with a partner throughout the writing process.

In order to determine how ELs develop as writers, a multiple case study was conducted in a …

Enhancing Students’ Higher Order Thinking Skills Through Computer-Based Scaffolding In Problem-Based Learning, Nam Ju Kim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this multiple-paper dissertation is to identify students' several difficulties in Problem-based learning and to address these issues by suggesting the design of computer-based scaffolding. In addition, the effectiveness of suggested design was confirmed through meta-analysis and the empirical research. Learner-centered Scaffolding Systems (LSS) is presented to improve students' perception of optimal challenge by addressing students' learning issues in PBL. LSS enhances students' experience in autonomy and competence by providing multiple types, modalities, and customization of scaffolding in accordance with student' different needs and difficulties in PBL. Bayesian meta-analysis for identifying the effects of suggested LSS indicated that …

Applications Of Relative Motion Models Using Curvilinear Coordinate Frames, Alex C. Perez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A new angles-only initial relative orbit determination (IROD) algorithm is derived using three line-of-sight observations. This algorithm accomplishes this by taking a Singular Value Decomposition of a 6x6 matrix to arrive at an approximate initial relative orbit determination solution. This involves the approximate solution of 6 polynomial equations in 6 unknowns. An iterative improvement algorithm is also derived that provides the exact solution, to numerical precision, of the 6 polynomial equations in 6 unknowns. The initial relative orbit algorithm is also expanded for more than three line-of-sight observations with an iterative improvement algorithm for more than three line-of-sight observations. The …

Recreation Community Branding: A Comparative Analysis Within Utah’S Wasatch Front, Lynda D. D. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study demonstrates the role recreational amenities play in contributing to the brand identity and sense of place in Utah master planned communities (MPCs). These MPCs are designed to enable residents to live, work, and play within close proximity within a styled built environment. While the built environment is often branded with a particular identity, these identities resonates with other attributes of the community, including recreation amenities. The study focused on MPCs along the Wasatch Front in Utah, since Utah’s population, along the Wasatch Front, is expected to double by 2050 (Envision Utah, n.d.). Many of the developments being built …

Conservative Tryptophan Mutations In Protein Tyrosine Phosphatase Ptp1b And Its Effect On Catalytic Rate And Chemical Reaction, Teisha Richan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Protein-tyrosine phosphatases (PTPs) catalyze the hydrolysis of phosphorylated tyrosines by a 2-step mechanism involving nucleophilic attack by cysteine and general acid catalysis by aspartic acid. In most PTPs the aspartic acid resides on a flexible protein loop, consisting of about a dozen residues, called the WPD loop. PTP catalysis rates span several orders of magnitude, and differences in WPD loop dynamics have recently been show to correlate with the rate of enzymatic catalysis. The rate of WPD loop motion could possibly be related to a widely conserved tryptophan residue on the WPD loop. Therefore, point mutants were made in PTP1B …

Effects Of A Classroom Intervention On Academic Engagement Of Elementary School Students With Anxiety, Lychelle Leatham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study evaluated the impact of anxiety reduction on academic engagement for elementary students experiencing high levels of anxiety. For participating students, the anxiety appeared to be impacting academic performance in the school setting. Student participants received modified cognitive behavioral therapy (CBT) including exposure tasks with adult support in the school setting. Both anxiety and academic engagement was monitored by participating students and their teachers. Results show that this intervention has promising outcomes and provides initial support that anxiety reduction increases academic engagement for anxious elementary students

Production Of Phenol-Formaldehyde Adhesives From Catalytic Pyrolysis Oil, Angela M. Akude

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Phenol-formaldehyde adhesives conventionally synthesized from fossil fuel resources pose two major concerns: sustainability issues and environmental concerns. The sustainability issues arise from the inevitable depletion of fossil fuel resources while
the environmental concerns, primarily, stem from the emission of volatile organic compounds. Thus, opting for alternative raw materials from renewable resources reduces the dependence on fossil fuels as well as promote the production of environmentally-friendly products.

The successful commercialization of bio-adhesives requires that the substitution of phenol with bio-oil during resin synthesis should be above 40%. In this study, catalytic pyrolysis oil produced from pinyon-juniper biomass and red mud alumina …

Effect Of N-3 And N-6 Polyunsaturated Fatty Acids On Inflammation, Tao Xu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Intake of polyunsaturated fatty acids (PUFA) has changed drastically in the past century in the American diet has received attention due to potential effects on chronic inflammation-related metabolic diseases. In this project, the effects of dietary PUFA content and the n-6 to n-3 ratio on inflammatory responses in the acute and chronic inflammation models were evaluated. The PUFA content was modified on a Western diet background to deliver both n-6 and n-3 intakes at the 10^th and 90^th percentile of the population in the United States, and models of acute and chronic inflammation were tested in mice model. …

Mechanism Of Substrate Reduction By Nitrogenase, Nimesh Khadka

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrogen (N) is a vital element of life and the main component of chemical fertilizer. The industrial Haber-Bosch process fulfills the demands of today’s nitrogen need and is therefore considered as one of the major scientific breakthroughs of the last century. However, the Haber-Bosch process operates at very high temperature and pressure, and requires fossils fuels to drive the reaction, making it an energy expensive process. The energy demand for this process accounts for almost 3% of the total global energy consumption. In addition, the rapid population growth, economic development and depletion of limited non-renewable fossil fuels have already created …

The Behavior And Ecology Of Cursorial Predators And Dangerous Prey: Integrating Behavioral Mechanisms With Population-Level Patterns In Large Mammal Systems, Aimee Tallian

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Driving into Yellowstone National Park for the first time is a moving experience. Gazing over the sweeping landscapes, seeing a geyser erupt 80 feet into the air, and having your first ‘wildlife encounter’, whether that be a 2 ton bull bison aggressively wallowing on his dirt mound, snorting and kicking up dust, or watching a pack of 6 wolves move through a valley off in the distance, pausing to howl in search of their companions. Yellowstone staff wishes to manage our park in a way that preserves these remarkable experiences. In order to effectively manage this dynamic ecosystem, it is …

Real-Time Vision-Based Lane Detection With 1d Haar Wavelet Transform On Raspberry Pi, Vikas Reddy Sudini

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rapid progress is being made towards the realization of autonomous cars. Since the technology is in its early stages, human intervention is still necessary in order to ensure hazard-free operation of autonomous driving systems. Substantial research efforts are underway to enhance driver and passenger safety in autonomous cars. Toward that end GreedyHaarSpiker, a real-time vision-based lane detection algorithm is proposed for road lane detection in different weather conditions. The algorithm has been implemented in Python 2.7 with OpenCV 3.0 and tested on a Raspberry Pi 3 Model B ARMv8 1GB RAM coupled to a Raspberry Pi camera board v2. To …

Adolescent Relationship Concerns And Perceived Gains From A Relationship Education Course, Jenny Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted with survey data drawn from a relationship education initiative in the state of Utah. Teenagers participated in the Premarital Interpersonal Choices and Knowledge (PICK) program (also known as How to Avoid Falling for a Jerk or Jerk-ette), a program designed for single individuals. They answered questions before and after the course, and I used their responses to answer two questions: (1) What concerns do middle-adolescents (ages 15-17) have about romantic relationships? (2) What do middle-adolescents gain from participation in PICK?

Data from 605 participants were combined and analyzed for themes. Teenage participants expressed concerns about …

Spatial Ecology Of Coyotes And Cougars: Understanding The Influence Of Multiple Prey On The Spatial Interactions Of Two Predators, Peter J. Mahoney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The coyote (Canis latrans) has expanded throughout much of North America over the past century following the regional extirpation of apex predators. These highly adaptable canids can occupy a variety of landscapes from the rainforests of Central America to the dense, human-dominated urban centers of the United States. As a generalist predator, coyotes can capitalize on a variety of food resources, including anthropogenic subsidies such as domestic livestock and food tailings at landfills. These tendencies often bring coyotes in direct conflict with humans, forcing managers to consider mitigation strategies ranging from the targeted removal of problem individuals to …

Hydrocarbon And Co2 Emissions From Oil And Gas Production Well Pad Soils Comparative To Background Soil Emissions In Eastern Utah, Cody S. Watkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

What effect does the development of oil and gas have on the observed air quality (i.e., increased ozone, carbon dioxide (CO₂), volatile organic compounds (VOCs), and/or methane emissions) in northeastern Utah? What percentage of these gases is natural background emissions, and what percentage is due to the recent oil and gas development in the region? Emissions in this text refer to gases released from the earth’s surface to the atmosphere. Methane is the primary compound in natural gas. Natural gas is a naturally occurring hydrocarbon gas mixture. Emissions of methane, non-methane hydrocarbons (NMHC), and CO₂ at 27 …

An Examination Of The Relationship Of Oral Reading Fluency, Silent Reading Fluency, Reading Comprehension, And The Colorado State Reading Assessment, Christy L. Bloomquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to evaluate how measures of oral reading fluency and silent reading fluency compare as predictors of reading comprehension and how these vary as a function of proficiency level for fourth- and fifth-grade students. Additionally, the study sought to examine the relationship between measures of ORF, SRF, reading comprehension, and the TCAP with these students. As silent reading fluency is utilized more in the classroom as grade level increases, a silent reading fluency measure might be a better predictor for maturing readers to determine reading proficiency, monitor student progress, and guide instructional practices.

A correlational …

Autonomous Highway Systems Safety And Security, Imran Sajjad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis aims to address question of safety and security in autonomous highway systems. Chains of multiple self-driving vehicles (platoons) give rise to inherent vulnerabilities to attacks resulting from their control algorithms. These weaknesses can possibly result in collisions or decreased traffic flow.

This work first provides an overview of these vulnerabilities analyzed from a control systems perspective. The capabilities and extent of damage that an attack can cause are analyzed. Then some possible mitigation strategies are presented that can defend against these attacks.

Simulation results are provided to support the effectiveness of these controllers and an experimental validation is …

A Descriptive Case Study Of Writing Standards-Based Individualized Education Plan Goals Via Problem-Based Learning In A Virtual World, Peter J. Blair

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The goal of this study was to examine the professional development experiences of two participants while they were creating standards-based individualized education plan (IEP) goals using a virtual world called TeacherSim. The focuses of the study were how did special educators engage with the task of creating standards-based IEP goals using TeacherSim and how did TeacherSim support or hinder this? This research used a descriptive case study selecting two participants from the larger data set of seven participants. The data was analyzed using qualitative coding which compared the observed experiences with the case propositions. This case study demonstrated that special …

Anaerobic Digestion Of Wastewater: Effects Of Inoculants And Nutrient Management On Biomethane Production And Treatment, Jason Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Due to population expiation and the increased awareness of the impact on the environment by wastewater treatment, improved wastewater treatment systems are needed to treat municipal and agricultural wastewater. Treating wastewater with oxygen decreases carbon compounds at the expense of energy to move carbon and oxygen to be in contact with each other. Anaerobic digestion of wastewater can reduce the cost by utilizing microbes to treat high amounts of carbon in wastewater without the need for extensive oxygen requirement. With a proper balance of nutrients, microbes also produce methane, a renewable energy source.

It has been suggested that microalgae be …

Design And Characterization Of A Time-Of-Flight Mass Spectrometer For Composition Measurements In The Upper Atmosphere, E. Addison Everett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mesosphere/lower thermosphere (MLT) is perhaps the least understood region of Earth's atmosphere. Too high for balloons and winged aircraft, yet too low for satellites, direct access to the MLT to make in-situ measurements is via high-speed sounding rockets for brief periods of at most a few minutes. Mass spectrometers have previously been used to make composition measurements in this region. But, mass spectrometry in the MLT is difficult, mainly due to the ambient pressures here and also the high speeds and short flight durations of sounding rocket missions. Time-of-flight mass spectrometers (TOF-MS) are capable of making fast, accurate measurements …

The Magic Of The Magic Kingdom: Folklore And Fan Culture In Disneyland, David Giles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A strong and vibrant fan culture surrounds Disneyland, despite the fact that Disney itself, in many cases, works hard to quash it. This surprising relationship dynamic is likely a result of the so-called “Disney Magic”—a term appropriated from Disney marketing material and applied to the unique emotional experience found in the park, often described with quasi-spiritual language.

This thesis examines three aspects of Disneyland’s fan culture in an attempt to understand the Magic and how it manifests in and sustains its fan culture. First is urban legends surrounding ash scatterings at the Haunted Mansion ride, which speak to dedicated fans’ …

Role Of Atp Hydrolysis And Mechanism Of Substrate Reduction In Nitrogenase, Sudipta Shaw

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrogen is essential for life on earth as it is a major constituent of amino acids and nucleic acids. Nitrogen gas (N₂) is the most abundant form of nitrogen in the atmosphere but the strong N≡N bond makes it unavailable for most organisms. Certain prokaryotes known as diazotrophs possess the unique ability to convert N₂ to ammonia (NH₃) which can be utilized by other organisms as a source of nitrogen. The diazotrophs perform this difficult reaction with the help of a complex metalloenzyme, nitrogenase. This enzyme is a major contributor of the fixed source of …

Environmental Values And Landscape Architecture: A New Ecological Paradigm Study, Emmet J. Pruss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In recent decades, landscape design theory has been affected by an increase in pro-environmental values. Largely, this trend has been associated with notions of ‘sustainability’ and ‘ecosystem services.’ These notions involve sustaining current human behaviors within the constraints of ecological limits and maximizing the benefits that humans receive from ecosystems, respectively. In this way, they involve high evaluations of the instrumental values of ecosystems, yet remain predominantly anthropocentric. As such, they are characteristic of shallow ecology worldview.

In order to assess whether the pro-environmental, yet essentially anthropocentric values involved with modern landscape architecture theory are reflected in the environmental worldviews …

A Tournament Approach To Price Discovery In The Us Cattle Market, Jeffrey Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cattle price discovery is a process of determining the price in the market through the interactions of cattle buyers (packers) and sellers (ranchers). Locating the price discovery center or market, and estimating price interactions among the regional fed cattle markets and also among feeder cattle markets can help define a relevant fed cattle procurement market. This research identifies that the U.S. cattle markets is discovered in the futures markets, feeder cattle futures and fed futures.

Understanding How Emergent Bilinguals Bridge Belonging And Languages In Dual Language Immersion Settings, Marialuisa Di Stefano

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to understand how young children bridge belonging and language in a dual language immersion (DLI) setting. I developed a 10-week ethnographic study in a Spanish-English third-grade class in the Northeast of the U.S. where data was collected in the form of field notes, interviews, and artifacts. Here I explored the way language instruction and student participation influenced the development of the teacher and students’ multiple identities. The findings of this study suggest that emergent bilinguals’ identity development derives from the process built through multiple dialogic classroom instruction and practices. The products of this process …

Predicting The Impact Of A Northern Pike (Esox Lucius) Invasion On Endangered June Sucker (Chasmistes Liorus) And Sport Fishes In Utah Lake, Ut, Jamie Reynolds

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Invasive species introductions are associated with negative economic and environmental impacts, including reductions in native species populations. Successful invasive species populations often grow rapidly and a new food web structure is established. The ability of invasive species to outcompete and prey upon native species are two characteristics that make them a leading cause of fish extinctions in North America.

Northern pike (Esox lucius; hereafter pike) are voracious ambush top predators \native to the upper Midwest and Mid-Atlantic regions of the lower 48 United States, Alaska, and southern Canada. Pike have been spreading across the Intermountain West and Pacific …

Identifying The Underlying Components Of Delay Discounting Using Latent Factor Modeling, W. Brady Dehart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many problematic behaviors can be conceptualized as choosing a smaller, immediate outcome over a larger, delayed outcome. For example, drug abuse involves choosing between the immediate euphoric effects of the drug and the delayed health and legal consequences of drug abuse. Individuals that consistently choose the smaller outcome are said to behavior “impulsively.” The goal of this dissertation was to understand how to change impulsive choice. Chapters 2 and 3 successfully demonstrate that impulsive choice can be altered by reframing how the choice is presented. For example, framing a delayed outcome using a specific date instead of a duration of …