Digital Commons Network^™

A Theory Of Conditional Party Opposition, Samuel Nelson

All Graduate Theses and Dissertations, Fall 2023 to Present

This paper takes a critical look at executive power in the United States. Recent years have shown an increase of executive power that many people including: scholars, media, and the public have become skeptical of. The new norm has been for the executive to bypass Congress in order to accomplish policy goals. Traditionally the separation of powers between the executive, legislative, and judicial branches has been the remedy to executive power. This thesis, however, argues that scholarship has largely ignored the role of political parties in government. Due to this, scholarship has misunderstood the role parties play in the separation …

Microbiome Assembly And Function In The Solitary Mason Bee, Osmia Lignaria (Megachilidae), Bailey Crowley

All Graduate Theses and Dissertations, Fall 2023 to Present

Animal-microbe interactions can influence host biology, ecology, and evolution. The assembly and function of microbes found within animal hosts oftentimes depends on which species are involved. Advances in sequencing technologies have permitted the exploration of host-microbe interactions in a variety of animals, including bees. Early research aimed at understanding the microbiomes of social bees, such as honey bees and bumble bees, found that microbes prevent the spoilage of stored pollen, breakdown indigestible nutrients into smaller molecules available for uptake by the host, and also protect the host from pathogens. When environmental stressors, such as increased temperatures, disrupt the microbiome, the …

The Interactions Between Drought Tolerant Corn Hybrids And Plant Water-Stress On Weeds And Their Host Capability For Spider Mites, Mercy Adhiambo Odemba

All Graduate Theses and Dissertations, Fall 2023 to Present

With climate change, it is predicted that more frequent high temperatures and drought severity will lead to an increase in damage caused by pests that thrive under these conditions. Spider mite outbreaks, for example, are associated with plant waterstress and there is evidence that some weeds are more resilient and adapted to drought than some crops, leading to major concerns for the management of these two pest types. Weeds directly compete with crops for limited resources, but what is unclear is which weeds harbor spider mites and whether they exacerbate the impact of spider mites on corn crops under water-stressed …

Implementing General Moment Equations For Parallel Closures In Nimrod, Hankyu Lee

All Graduate Theses and Dissertations, Fall 2023 to Present

Understanding how magnetic fields impact plasma transport is essential for improving the efficiency of thermonuclear fusion power plants. To address the transport problem, both plasma fluid equations and Maxwell’s equations must be solved. To solve these equations, it is necessary to derive closure relations that allow the system to be closed. Previous closure models are useful for describing the behavior of high-collisionality plasma but are not effective at low collisionality. To obtain closure relations valid for low collisionality, the first-order drift kinetic equation must be solved.

This study presents methods for numerically obtaining parallel closures for NIMROD code by deriving …

Ensemble Machine Learning At The Edge Using The Codec Classifier Structure And Weak Learners Guided By Mutual Information, Aj Beckwith

All Graduate Theses and Dissertations, Fall 2023 to Present

The Codec Classifier is a low-computation, low-memory tree ensemble method that dramatically improves feasibility of image classification on resource-constrained edge devices. It achieves advantages over other tree ensemble methods due the separation of encoder and decoder tasks in the classifier. The encoder partitions feature space, and the decoder labels the regions in the partition. This functional separation of tasks enables the encoder design (partitioning) to be guided by maximizing the mutual information (MI) between class labels and the features (i.e. the encoded representation of the data) without regard to the error performance of the classifier. Experiments show maximizing MI leads …

A Position Allocation Approach To The Battery Electric Bus Charging Problem, Alexander Brown

All Graduate Theses and Dissertations, Fall 2023 to Present

With an increasing adoption of Battery Electric Bus (BEB) fleets, developing a reliable charging schedule is vital to a successful migration from their fossil fuel counterparts. In this work, a BEB charging scheduling framework that considers fixed route schedules, multiple charger types, and battery dynamics is modeled as a Mixed Integer Linear Program (MILP). The MILP is modeled after the Berth Allocation Problem (BAP) in a modified form known as the Position Allocation Problem (PAP). The optimization coordinates BEB charging to ensure that each vehicle remains above a specified charge percentage. The model also minimizes the total number of chargers …

California Condor Feeding Habitat, Vigilance, And Competition With Avian Scavengers In Southern Utah, Usa, Alex Blanche

All Graduate Theses and Dissertations, Fall 2023 to Present

Independent foraging is needed for the reintroduction of a species to be successful, but it can cause cascades in interconnected ecological communities. California condors (Gymnogyps californianus) were reintroduced to the Colorado Plateau in 1996, and the population has continued to grow with yearly releases of captive individuals. However, little is known about foraging behavior of condors and their potential competitors. Carrion is a risky food source, and there is a tradeoff between vigilance and feeding. Altering behavior can maximize caloric intake while minimizing risk. Here, I investigate habitat selection, vigilance, and interspecific interactions among condors, golden eagles ( …

The Rise And Fall Of Elizabeth Holmes: Investigating Myths Within Media Coverage, Charlotte Emelia Williams

All Graduate Theses and Dissertations, Fall 2023 to Present

When Elizabeth Holmes became the youngest female billionaire in 2014, news media framed her as the next Steve Jobs due to her similarities as a dropout, a passionate industry disruptor, and a visionary. When she was discovered as a fraud in 2018, coverage framed her as a feminine, seductive monster who duped everyone. I analyzed the media coverage in both years to uncover myths that guided these narratives and argue that these news frames contributed to the large interest in her rise and fall while also reinforcing harmful ways of thinking toward success and female leadership.

Stratigraphic Evidence For Indigenous Use Of Fire As A Dryland Agricultural Landscape Management Tool On The Northern Colorado Plateau, Mariah Walzer

All Graduate Theses and Dissertations, Fall 2023 to Present

While documented in ethnography and traditional ecological knowledge, Indigenous burning practices are rarely recognized in the archaeological record of the Great Basin and Colorado Plateau. I analyzed charcoal from an arroyo wall to understand the relationship between Indigenous farmers and fire at the Cub Creek archaeological site (AD 300-1300) in Dinosaur National Monument. The size, shape, and amount of charcoal in each sediment layer indicates the fuel types (woody or grassy) and relative size and/or intensity of fires. I compared my data to a precipitation reconstruction for the area to evaluate the influence of climate on fire activity. The results …

An Xrf Elemental Analysis Of Prosser Molded Beads From Southwest Oregon, Michele Hoferitza

All Graduate Theses and Dissertations, Fall 2023 to Present

Glass beads were brought to the North American continent by European explorers and traders beginning in the 17^th century. Native Americans quickly adopted beads as trade commodities and personal ornaments. Prosser beads were made predominately in France and Bohemia from the 1860’s to the 1970’s and can be found in archaeological contexts from coast to coast. In this study, elemental analysis using X-Ray fluorescence (XRF) technology is used to determine if there is a way to chemically discern where and when the beads were made.

Statistical analysis of three categories of elements was done to determine whether the creation …

Gps-Denied Navigation Using Location Estimation And Texel Image Correction, Nikolas I. Jensen

All Graduate Theses and Dissertations, Fall 2023 to Present

In recent years, the use of small drones, also categorized as small Unmanned Aerial Vehicles (sUAV), has surged. They are used for tasks like surveying land, collecting data from a distance, and performing maneuvers for military operations. These drones are popular because they are affordable, small, easy to use, and can navigate well in complex areas. These factors make them a cheap and quick option for tasks like surveying and surveillance when compared to traditional methods.

This thesis introduces a system that uses algorithms to figure out where the drone is. Typically, this relies on sensors and GPS, but GPS …

Computational Fluid Dynamics Modeling Of Air Demand For Fixed Cone Valve In Energy Dissipating Structure, Matthew S. Harames

All Graduate Theses and Dissertations, Fall 2023 to Present

Fixed cone valves are commonly installed as low-level outlet devices to discharge water from reservoirs. When discharging water, the fixed cone valves require an air vent to properly operate and maintain the valve. There is a current lack of published information regarding the accuracy of model studies to properly estimate the air demand on the full-size prototype. This research aims to help close that gap by providing data comparison between a model and prototype. Furthermore, computational fluid dynamics (CFD) simulations may be used to estimate the air demand, but the results of such have not been verified nor is information …

Online Multiplayer Video Game Play And College Adjustment, Salina M. Ochoa

All Graduate Theses and Dissertations, Fall 2023 to Present

There are an increasing number of individuals who participate in multiplayer video games and an increase in screen time overall. Due to the increase in online video game play, this study aimed to find possible positive impacts that online multiplayer video games had on freshmen who are adjusting to college, as this is a pivotal point in life. The data were collected at the beginning of the second semester and 99 freshman, 18 years or older, who regularly engaged in online multiplayer video games participated in the study. The study showed four important findings: First, students who receive support from …

Federated Learning In Wireless Networks, Xiang Ma

All Graduate Theses and Dissertations, Fall 2023 to Present

Artificial intelligence (AI) is transitioning from a long development period into reality. Notable instances like AlphaGo, Tesla’s self-driving cars, and the recent innovation of ChatGPT stand as widely recognized exemplars of AI applications. These examples collectively enhance the quality of human life. An increasing number of AI applications are expected to integrate seamlessly into our daily lives, further enriching our experiences.

Although AI has demonstrated remarkable performance, it is accompanied by numerous challenges. At the forefront of AI’s advancement lies machine learning (ML), a cutting-edge technique that acquires knowledge by emulating the human brain’s cognitive processes. Like humans, ML requires …

Birds, Bees, And The Babies: Study Of The Influence Of Self-Efficacy On Parent-Child Sex Communication, Cassandra M. Craig

All Graduate Theses and Dissertations, Fall 2023 to Present

Previous studies show that parents tend to be uncomfortable discussing sexual topics with their children, such as menstruation, masturbation, and/or condom use. This study offers a look at the part confidence plays in a parent's intentions to talk to their kids about such topics. The results indicated that the confidence parents feel about discussing sexual topics is not related to how much their own parents talked with them about sex. However, the confidence they feel that could be coming from other models, like social media or peers, is related to how much parents intend to talk with their own children …

Emerging Technologies And Advanced Analyses For Non-Invasive Near-Surface Site Characterization, Aser Abbas

All Graduate Theses and Dissertations, Fall 2023 to Present

This dissertation introduces novel techniques for estimating the soil small-strain shear modulus (G_max) and damping ratio (D), crucial for modeling soil behavior in various geotechnical engineering problems. For G_max estimation, a machine learning approach is proposed, capable of generating two-dimensional (2D) images of the subsurface shear wave velocity, which is directly related to G_max. The dissertation also presents a method for estimating frequency dependent attenuation coefficients from ambient vibrations collected using 2D arrays of seismic sensors deployed across the ground surface. These attenuation coefficients can then be used in an inversion process …

Contrasting Management Styles And Differing Outcomes Of Capping And Orphaning Of Utah Oil And Gas Wells By Conditions And Land Types, Maxwell C. Parson

All Graduate Theses and Dissertations, Fall 2023 to Present

The issue of public lands management and ownership in the West has long been contentious. This thesis takes a quantitative approach examining outcomes of the rates at which oil and gas wells in the state of Utah are orphaned and/or capped. Findings indicate that orphanings occur at a statistically significant higher rate on state owned land as opposed to federal and private, and wells on tribal land have no recorded orphaning. No other variables were significant in their relationship to orphaning. The proposed explanations for this disparity are two-fold: First the longer periods of inactivity permitted by the state simply …

Validating A Scale Of Psychological Flexibility And Inflexibility For Older Adolescents, Caleb Douglas Farley

All Graduate Theses and Dissertations, Fall 2023 to Present

Psychological flexibility (PF) is a skill that is related to various mental health experiences in adults. Higher levels of PF seem related to greater wellbeing. Given increases in mental health problems with youth, measuring PF and its inverse, psychological inflexibility (PI), might be useful for identifying those teenagers at risk for mental health challenges and referring them to appropriate interventions. To date, most measures of PF and PI are only available for adults older than 18, and, while theory suggests PF and PI are important for adolescent mental health, little research has examined the validity of these claims. This multipaper …

Utilizing Bayesian Optimization In Technoeconomic Analyses For Integrated Energy Systems, Anthoney Griffith

All Graduate Theses and Dissertations, Fall 2023 to Present

Technoeconomic analysis is a key element in the study of integrated energy systems. The goal of this analysis is the sizing of technologies resulting in the best economic outcome for the system. The evaluation of this system involves sizing the components and simulating the resulting market to determine an outcome. This simulation incorporates multiple possible values of uncertain parameters like grid price and wind generation. This problem is currently approached with the gradient descent optimization method. An alternative approach, Bayesian optimization, sees success on simple problems of a similar nature to technoeconomic analyses. These results motivate applying Bayesian optimization as …

Creating A Virtual Hierarchy From A Relational Database, Yucong Mo

All Graduate Theses and Dissertations, Fall 2023 to Present

In data management and modeling, the value of the hierarchical model is that it does not require expensive JOIN operations at runtime; once the hierarchy is built, the relationships among data are embedded in the tree-like hierarchical structure, and thus querying data could be much faster than using a relational database. Today most data is stored in relational databases, but if the data were stored in hierarchies, what would these hierarchies look like? And more importantly, would this transition lead to a more efficient database? This thesis explores these questions by introducing a set of algorithms to convert a relational …

An Online Scientific Twitter World: Social Network Analysis Of #Sciencetwitter, #Scicomm, And #Academictwitter, Man Zhang

All Graduate Theses and Dissertations, Fall 2023 to Present

Understanding who makes up online social worlds as well as how information flows within those communities is important as more people access news, research topics, collaborate with others, and entertain themselves. This study identified and classified the people discussing scientific topics on Twitter, determined the type of social network, and described the member composition of this online world. Scientists, the public, and educators formed this online world. They built connections by initiating activities and interacting with others, which created the Community Clusters social network structure. All three categories of people are in positions of influence in this network leading and …

Dionysus The Barbarian, Deven Salisbury

All Graduate Theses and Dissertations, Fall 2023 to Present

This thesis analyzes the changes in the way the Greeks depicted foreigners and Dionysus, the god of wine, over a period of approximately four hundred years in their art and literature. It argues that ways in which the god and foreigners (also known as "barbarians") are closely linked and that the changes made to Dionysus' character are closely analogous to those they made to the characterization of the barbarian.

Empowering Graphics: A Distributed Rendering Architecture For Inclusive Access To Modern Gpu Capabilities, Taylor Anderson

All Graduate Theses and Dissertations, Fall 2023 to Present

Modern rendering software requires powerful GPUs with the latest hardware features in order to utilize all of the newest rendering techniques. Many users do not have access to this hardware, and rely on remote server farms or reduced performance to achieve usable results. In this thesis, the software is designed and created to allow for a user to share the resources of their computer with another, modeling a split-screen setup like was common in the past, but without requiring users to be in the same location.

By designing the software from the ground up to support this, instead of adding …

The Role Of Extracellular Vesicles In Immunomodulation During Bovine Pregnancy, Amber E. Thornton

All Graduate Theses and Dissertations, Fall 2023 to Present

During pregnancy, the maternal immune system must be altered to protect the partially non-self fetus from attack. Our previous studies show an inflammatory response in the uterus of cows carrying somatic cell nuclear transfer (SCNT), commonly known as cloned, pregnancies due to abnormalities in proteins expressed by placental trophoblast cells. Between 30 and 90 days the rate of pregnancy loss is 50-100% for SCNT compared to 2-10% for artificial insemination (AI) pregnancies. Abnormal communication between the maternal and fetal systems during placentation is a major cause of this loss. The trafficking of extracellular vesicles (EVs), membrane-bound cargo carriers, potentially represents …

Channel Response To Flow Augmentation: Diamond Fork River, Ut, Diane E. Wagner

All Graduate Theses and Dissertations, Fall 2023 to Present

A river’s physical features and channel dimensions are determined by the water and sediment supplied to it. The Diamond Fork River, located in central Utah—received large trans-basin diversion flows from 1915-2003, providing an exceptional opportunity to explore the response of a river to a large increase in flow.

Our project goals were to describe 1) channel response to this large and long artificial flow augmentation and 2) how the channel recovered after the removal of the diversion flows. The objective of this thesis is to document the channel condition throughout the 20^th century to present day as a basis …

Exploring The Role Of Near Channel Geospatial Attributes To Predict Suspended Sediment Concentration Patterns Across The Conus Region, Aaron J. Sigman

All Graduate Theses and Dissertations, Fall 2023 to Present

High concentrations of suspended sediment (SSC) in a river can represent a critical water quality concern, reduce the storage capacity of reservoirs, and impact aquatic habitat. The total amount of sediment is calculated from a combination of river properties, including the amount of available sediment and the flow of water carrying the sediment. Water flow properties can be found using local information about the channel, however understanding the concentration of sediment in the river requires understanding the supply of sediment from the watershed. To understand where sediment is coming from, we examined over 1000 United States Geological Survey sites with …

Exploring Application Of The Coordinate Exchange To Generate Optimal Designs Robust To Data Loss, Asher Hanson

All Graduate Theses and Dissertations, Fall 2023 to Present

The primary objective of this study is to evaluate the efficacy of the coordinate exchange (CEXCH) algorithm in the generation of robust optimal designs. The assessment involves a comparative analysis, wherein designs produced by the Point Exchange (PEXCH) Algorithm are employed as benchmarks for evaluating the efficiency of CEXCH designs. Three modified criteria, selected from the traditional alphabet criteria pool, are utilized to score each algorithm. To enhance the reliability of the comparative analysis, multiple rounds of validation are conducted, focusing on visual assessments, design scores, and criteria efficiencies. The findings from each round of validation contribute to a comprehensive …

Hunting For Agriculture: Unraveling Ecological Motivations In The Transition To Farming By The Fremont Cultural Complex, Ryan Mcgrath

All Graduate Theses and Dissertations, Fall 2023 to Present

This study explored the profound human history shift from foraging to agriculture, focusing on Utah's Fremont cultural complex. Utilizing the Prey-Rank Model, we investigated whether dwindling encounter rates with high-rank prey prompted the Fremont's adoption of agriculture. We quantified past resource trends by analyzing the Utah archaeofaunal database to discern if ecological conditions influenced this transition. If confirmed, it suggests adaptive responses to a decline in high-ranked game led to a more resource-intensive survival strategy. This research provides crucial insights into the motivations behind the Fremont's agricultural adoption, enhancing our understanding of human-environment interactions and adaptations throughout history.

Advancing Near Surface Soil Moisture Measurements Using Robotics, Automation, And Remote Sensing, Hemanth Narayan Dakshinamurthy

All Graduate Theses and Dissertations, Fall 2023 to Present

Near-surface soil moisture, or the water content within the soil, is important for understanding the interactions between land and the atmosphere, and for monitoring plants in agricultural settings. However, soil moisture can be highly variable within the same field and varies considerably with time. The challenge involved with measuring soil moisture is that traditional techniques that rely on obtaining large samples are labor and time-intensive, especially for large fields. Developments in sensor technologies have allowed users to record the soil moisture regularly at the points where the sensors are installed. However, to understand how soil moisture changes across a field …

The Effect Of Seed Mix Density And Composition On Wetland Plant Community Assembly In The Great Salt Lake Watershed, Elana Feldman

All Graduate Theses and Dissertations, Fall 2023 to Present

Wetlands provide important ecosystem services to society but are in danger across the globe partly due to the spread of invasive species (species that harm humans, the environment, or the economy). One species, Phragmites australis, is a widespread invader across the country, including in the wetlands of the Great Salt Lake and Utah Lake. Phragmites australis spreads widely and quickly outcompetes native species. In places where P. australis has already been removed, seeding wetlands helps block P. australis from returning. Native plants’ ability to prevent invasive species from entering the community is affected by many factors, but two that …