Digital Commons Network^™

Interactions Between Water-Stress And Maize Resistance To Spider Mites With Varied Host Specialization, Gunbharpur S. Gill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spider mites are well-documented pests of many agricultural crops including cereals such as maize. In hot and dry conditions, when crop plants are under water-stress, spider mite populations can rapidly increase within weeks and can cause severe yield losses. One approach to manage pests, such as spider mites, is through the development and selection of plants that can resist pests. Screening of maize lines has provided evidence of spider mite resistance; however, it is unclear how plant water-stress may affect the ability of maize to sustain spider mite resistance. In addition, it is important to understand how plants respond to …

College Prescription Opioid Misuse: An Exploration Of Social Learning, Social Control, And Strain Theories, Julie Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Prescription opioids, when used as medically intended, can be effective in pain management. However, the consequences and costs of widespread misuse of prescription opioids in the United States are cause for concern. Prescription opioids are related to increased risk of death and injury. Young adults, between the ages of 18 and 25, have the highest rates of misuse nationally and within this age group, college students may be particularly at risk. In order to effectively curb the growing misuse of prescription opioids within college populations, we must have a better understanding of the factors that potentially lead to misuse.

This …

Development Of A High-Resolution Land Cover Dataset To Support Integrated Water Resources Planning And Management In Northern Utah, Ellie Irene Leydsman Mcginty

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Integrated planning and management approaches, including bioregional planning and integrated water resources planning, are comprehensive strategies that strive to balance the sustainability of natural resources and the integrity of ecosystem processes with human development and activities. Implementation of integrated plans and programs remains complicated. However, geospatial technologies, such as geographic information systems and remote sensing, can significantly enhance planning and management processes.

Through a United States Environmental Protection Agency Region 8 Wetland Program Development Grant, a high-resolution land cover dataset, with a primary emphasis on mapping and quantifying impervious surfaces, was developed for three watershed sub-basins in northern Utah - …

A Data-Driven Regional Model Of Stomatal Conductance For Kruger National Park, Rebecca L. Tobin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Stomata are the gateway between the lithosphere, the biosphere, and the atmosphere. Because of photosynthesis, plants inevitably lose water through their stomata. The rate at which water moves through stomata is stomatal conductance. As stomatal conductance increases, the rate of CO₂ assimilation increases, therefore, plants must reach a balance between acquiring CO₂ and losing H₂O. Plants achieve this balance by adjusting stomatal aperture. Therefore, modeling stomatal conductance is important to global circulation models and land surface models, as well as for predicting how changing climate conditions affect water use efficiency and plant productivity, and has implications …

Early Adolescent Gifted And Talented Students And Their Experience With Bullying, William T. Allen Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bullying, in all its forms (e.g., verbal, physical, cyber, social ostracism), is a continual problem in public schools. It exacerbates the painfully high suicide rate among early adolescent students, especially in the western U.S., with some evidence showing distinctions within the academically advanced gifted and talented (GT) cohort. Research shows GT students (GTs) are bullied at nearly double the rate of the mainstream population. Yet, quantitative statistics indicate GTs and non-GTs suffer comparable rates of trauma internalization, suicide ideation, and suicide. Some quantitative differences do start to appear with further personality distinctions. This points to a possibility that qualitative dissimilarities …

Exploring The Connection Between Acid Exposure And Virulence In Listeria Monocytogenes, Minghao Li

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Listeria monocytogenes is a gram-positive food-borne pathogen that is widely dispersed in the environment and can cause listeriosis with high fatality rates when consumed in contaminated food products. They are capable of growing over a wide range condition. Listeria is also able to tolerate adverse conditions which allows the bacterium to survive in unfavorable environments. The ubiquitous nature of L. monocytogenes makes it difficult to eliminate from food systems. One major problem in the food industry is the survival of L. monocytogenes under sublethal low pH-environment since organic acids are widely used as food decontaminants. Prior research has suggested that …

Espoused And Enacted Beliefs Of High School English Language Arts Teachers In Writing Instruction, Sydnie Schoepf

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the current study is to explore the espoused beliefs and enacted practices of secondary English Language Arts teachers with regards to writing instruction and how these beliefs correlate with teacher self-efficacy beliefs. The study worked to build upon the literature mainly in the fields of mathematics and science in order to explore what the perceived and enacted beliefs are and how they affect the self-efficacy belief of teachers within the field of writing instruction in the high school classroom. The study used a collective case study design in order to better understand what espoused and enacted pedagogical …

Protecting Crops From Abiotic Stress: Copper Oxide Nanoparticle Effects On Wheat And A Beneficial Rhizobacterium, Matthew Potter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nanoparticles (NPs) are defined as particles less than 100 nm in at least one dimension. CuO NPs have possible applications in agriculture as micronutrient sources, pesticides, and enhancers of crop stress tolerance. Here, three aspects of CuO NP agricultural applications are studied: 1) the potential of CuO NPs to prevent wheat lodging-when crops irreversibly fall over; 2) CuO NP-induced drought tolerance in wheat seedlings; and 3) the effects of CuO NPs on outer membrane vesicle (OMV) production by Pseudomonas chlororaphis O6 (PcO6), a plant-health promoting bacterium.

Wheat grown 7 d exposed to CuO NPs in the growth matrix …

Methods In Modeling Wildlife Disease From Model Selection To Parameterization With Multi-Scale Data, Ian Mcgahan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of emerging wildlife diseases are global and profound, resulting in loss of human life, economic and agricultural impacts, declines in wildlife populations, and ecological disturbance. The spread of wildlife diseases can be viewed as the result of two simultaneous processes: spatial spread of wildlife populations and disease spread through a population. For many diseases these processes happen at different timescales, which is reflected in available data. These data come in two flavors: high-frequency, high-resolution telemetry data (e.g. GPS collar) and low-frequency, low-resolution presence-absence disease data. The multi-scale nature of these data makes analysis of such systems challenging. Mathematical …

Try The Wine: Food As An Expression Of Cultural Identity In Roman Britain, Molly Reininger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research surrounding cultural identity and food customs throughout history are published often, but any research that attempts to combine the two are often based in more recent history. Few combinations of the two are available, and fewer explore the implications within ancient colonization and expansion.

The research for this thesis was conducted with three viewpoints in mind: the colonization of Britannia from Romans within the new colony, the colonization from the native Briton's perspective, and the Roman citizens within Britannia at the end of Rome's military involvement with the colony. This method was chosen because in the early years of …

Automating And Analyzing Whole-Farm Carbon Models, Aditi Maheshwari

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The goal of this research is to learn about whole farm carbon models. A whole farm carbon model estimates the emissions of greenhouse gasses (GHGs) based on information for a farm. We analyzed two models, HOLOS whole-farm and COMET-Farm, by running the models on random inputs and building classifiers from the runs. HOLOS estimates GHG emissions for a particular year based on crop and animal agriculture input, while COMET-farm adds past and future farm management practices. Users of the models must manually enter farm data through a graphical user interface (GUI), which is a good method for a single farm, …

Harmful Algal Blooms: Dominance In Lakes And Risk For Cyanotoxin Exposure In Food Crops, Austin D. Bartos

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Climate change and human activities are promoting the dominance of a photosynthetic family of aquatic bacteria, cyanobacteria. Blooms of cyanobacteria are not only a visual nuisance but can produce a variety of cyanotoxins than can harm the liver, skin, and nervous system of animals and humans. We analyzed lakes in the contiguous United States and found that between 2007 and 2012, the number of lakes that produced measurable quantities of cyanotoxins increased from 33% to 45%. Nitrogen and phosphorus pollution were the main drivers of cyanobacteria blooms and toxin production between these years. Many of these lakes and reservoirs are …

National Survey Of Professional Development On Writing Compliant Transition Individualized Education Programs, M. Faith Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A national survey of special education administrators was conducted on current special education teacher trainings, the internal monitoring processes on transition IEPs, and the effect training has on compliance with federal law. In addition, this student researcher examined training and internal monitoring systems to determine if there were any similarities or differences between rural, suburban, and metropolitan school districts. An explanatory sequential mixed methods design gathered survey data from 147 special education administrators from across the U.S. and conducted interviews with 14 participants representing rural, suburban, and metropolitan school districts. When combining survey and interviews data, the results showed that …

Social Change Engagement And Leadership Development Among College Students, Andrew Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Young people are increasingly in the public view as agents of social change. As suggested in the Social Change Model of Leadership Development, those who develop the seven values of socially responsible leadership (consciousness of self, congruence, commitment, common purpose, collaboration, controversy with civility, and citizenship) are prepared to engage in the leadership process by creating positive social change. Findings from this study suggest that the socially responsible leadership value of citizenship was the value most consistently related to social change engagement. Additionally, social generativity, or the desire to leave a legacy for future generations, as well as participating in …

Teaching Appropriate Feedback Reception Skills Using Computer-Based Training, Seth G. Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Feedback is a commonly used intervention to address performance issues in a number of settings. Most research on feedback has focused on manipulating parameters surrounding the delivery of feedback. However, the interaction between those delivering the feedback and a feedback recipient may also influence the impact of performance feedback. The current study investigated the efficacy of training individuals to receive feedback in an appropriate manner using a computer-based training format. Following computer-based training, participants exhibited increases in accuracy of appropriate feedback behaviors when compared to baseline. Participants also demonstrated slight increases in performance on primary job tasks. This study extends …

Rome, Robes, And Rivers: Land, Water, And Power In The Aniene Valley, Jonah R. Bibo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rome, Robes, and Rivers is a multi-century environmental history that shows how different occupants in the Italian Aniene river valley help power through the exploitation and control of its land and water resources. It ranges from the classical to late medieval eras, focusing on the Roman empire alongside later Benedictine monastic societies, who each used different tactics to maintain control over the land. Roman aqueducts brought water to the city, while Benedictine monks taxed peasant laborers to maintain control of the land. Each occupant shaped the land their own needs and left their mark on the landscape in ways that …

A Stratospheric Approach To Diagnose The North American Winter Dipole, Henrik Panosyan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It has been well established in the literature that the stratosphere is dynamically coupled with the troposphere during boreal winter. The North American Winter Dipole is comprised of an upper-tropospheric contrast between a ridge over western North America, and a trough over eastern North America. The variance of this circulation regime has increased in recent years, with its amplified states being associated with extremes ranging from drought and floods, to extreme cold air outbreaks. This study explores the stratospheric link to this extreme weather regime, in the hopes of ultimately improving the predictability of this regime on intraseasonal-to-seasonal timescales. We …

Supporting Adolescent Mental Health Within School Culture And Curricula: Inviting Adolescents To Utah's Mental Health Conversation, Diana West

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah is facing a mental health crisis. Between 2011 and 2017, teen suicides nearly tripled in Utah and had become the leading cause of death for children ages 10-17. Educators and policymakers are scrambling to provide students with mental health supports in schools, but an incomplete understanding of the challenges that students face can make it difficult to meet their needs. Each year state agencies ratchet up awareness, funding, and the determination to support mental health initiatives, but each year adolescent mental health in Utah becomes more precarious. The purpose of this study is to change the conversation by inviting …

Exploring In Vivo And In Vitro Regulation Of The Shigella Type Three Secterion System Atpase Spa47, Heather B. Case

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Diarrheal disease is caused by a diverse group of enteric pathogens and is one of the leading causes of preventable deaths worldwide. Some of the most common causes of diarrheal disease are bacterial pathogens such as Salmonella, E. coli, Cholera, and Shigella. Many bacterial enteric pathogens use a type three secretion system (T3SS) to cause infection. The T3SS uses a needle and syringe like apparatus that allows the bacteria to inject proteins into the host cell to cause infection. Striking similarities in T3SSs from all pathogens that utilize them makes the T3SS an attractive target for …

Universal Localizations Of Certain Noncommutative Rings, Tyler B. Bowles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A common theme throughout algebra is the extension of arithmetic systems to ones over which new equations can be solved. For instance, someone who knows only positive numbers might think that there is no solution to x + 3 = 0, yet later learns x = -3 to be a feasible solution. Likewise, when faced with the equation 2x = 3, someone familiar only with integers may declare that there is no solution, but may later learn that x = 3/2 is a reasonable answer. Many eventually learn that the extension of real numbers to complex numbers unlocks solutions …

Harvest Efficiency Of Forage Grazed By Cattle And The Effect Of Pinyon And Juniper Treatments On Vegetation Cover On The Grand Staircase Escalante National Monument, Ruger P. Carter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Grand Staircase Escalante National Monument (GSENM), located in central south Utah, currently has 76,957 active grazing animal unit months on the monument. Recently, there has been questions whether the harvest and grazing efficiency coefficients developed in the Midwest are applicable to the arid, bunch grass dominated systems of the GSENM. Harvest and grazing efficiency defines the percentage of allocated forage that is being ingested by the animal, and the percentage that is being wasted. Harvest and grazing efficiency coefficients were calculated on the Lower Cattle allotment on the GSENM by taking total forage production and dividing that by expected …

Development And Identification Of Metrics To Predict The Impact Of Dimension Reduction Techniques On Classical Machine Learning Algorithms For Still Highway Images, Wasim Akram Khan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

We are witnessing an influx of data - images, texts, video, etc. Their high dimensionality and large volume make it challenging to apply machine learning to obtain actionable insight. This thesis explores several aspects pertaining to dimensional reduction: dimension reduction methods, metrics to measure distortion, image preprocessing, etc. Faster training and inference time on reduced data and smaller models which can be deployed on commodity hardware are a critical advantage of dimension reduction. For this study, classical machine learning methods were explored owing to their solid mathematical foundation and interpretability.

The dataset used is a time series of images from …

Geomorphic History Of The Grand Staircase Region Of The Colorado Plateau: Understanding Arroyo Cut-Fill Dynamics, Erosion Rates, And Wildfire, Kerry E. Riley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Most streams in the southwestern United States do not flow all year, and given their delicate balance of sediment and water flow, they are sensitive to climate change. At the turn of the 20th century, many streams in the Southwest rapidly incised into their floodplains, forming arroyos with a channel entrenched into near-vertical channel banks mostly composed of sand and mud. This dissertation investigates past changes in watersheds draining the Grand Staircase region in southern Utah with the goal of understanding how changes in climate and sediment influence these types of streams. Results show sediment supply is highly variable across …

Design Of A Sweeping Impedance Probe For The Sport Mission, Caleb W. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In our modern world satellite systems are an evermore common part of day to day life. Reliable communication from the ground to these satellites is becoming more and more necessary. Plasma scintillations in the ionosphere can make these communications difficult or even impossible. By gaining a better understanding of these scintillations, times of bad satellite connection can be predicted in the same way terrestrial weather gets predicted and reported today. The objective of the SPORT mission is to gain a better understanding of these plasma scintillations. In order to measure plasma density, and gain a better understanding of plasma scintillations, …

Extending Ethos In Digital Rhetorics, Andrew J. Hillen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation researched the concept of ethos, or appeal to authority or trust, on the social media platform, Twitter. Looking at collections of tweets, I found that the characteristics of the Twitter platform, as well as the general qualities of writing online, pushed users to use short cuts to trust, such as focusing in on specific buzz words, or through referencing well known organizations and individuals. Users also used internet culture as its own source of authority. They demonstrated that they were up to date on the latest trends and memes, and so were trustworthy accounts to follow. Users appealed …

Connections Between Hydrothermal System Geochemistry And Microbiology: Traversing Tectonic Boundaries In The South-Central Peruvian Andes, Heather Upin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Geochemistry and microbiology are inherently tied in the natural world. The study of geomicrobiology has historically taken place in extreme systems, like hot springs of Yellowstone National Park and deep-sea hydrothermal vents, because the organisms that exist there have deep lineages on the tree of life and provide insight into early life on Earth. These microbes use chemical energy from nutrients available in their environment rather than relying on photosynthesis, energy obtained from the sun, to support their metabolism. The goal of this study is to improve our understanding of geological controls (for example the tectonic setting) on hot spring …

Study Of Levee Underseepage Through Abandoned Channels And Point Bars On Curved Levee Sections Using The Response Surface-Monte Carlo Method, Tomsen Reed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The current procedures for calculated the probability of failure of levees (earthen structures designed to prevent flooding of important locations) all have their own unique limitations. Some methods are very simplistic, and either ignore or do not allow for inclusion of complex geometries. Other methods allow for complex geometry, but do not lend themselves to large quantities of analysis because of the amount of time it takes to create or modify a model. For these reasons, previous research performed by Lourdes Polanco and Dr. John Rice developed the preliminary stages of a new method called the Response Surface-Monte Carlo method. …

A Mormon Missionary's Guide To Conversion Therapy Addiction Recovery, Shaun Anderson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This collection of essays explores my experience as a gay Mormon missionary, when I studied the Mormon Church's Addiction Recovery Program in an attempt to alter my sexuality. The initial four essays take place during the two years that I lived in Southern California as a Mormon missionary from 2011-2013. They present the text of the LDS Family Services Addiction Recovery Program workbook, with my own thoughts, experiences, and stories driven into the margins. Through these four essays, I demonstrate the hope, anguish, and longing of a gay man who desperately wants to live the model of a righteous Mormon …

Anthropogenic Influences On Bacterial Assemblages In Stream Biofilms, Elizabeth M. Ogata

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bacteria within biofilms are an essential component of stream ecosystems, influencing the movement of carbon (C), nitrogen (N), and phosphorus (P) in watersheds. To better understand the ecological effects of human activities on stream ecosystems, my research examined how nutrients and pharmaceuticals, common pollutants in streams worldwide, influence bacterial assemblages in stream biofilms. First, I tested how nutrients (N, P, iron) and pharmaceuticals (caffeine, diphenhydramine) influenced biofilm bacterial microbiomes (taxa present in at least 75% of samples of a contaminant treatment). Nutrients allowed taxa known for their ability to thrive in nutrient-rich environments to dominate microbiomes, pharmaceuticals supported a rich …

A Translational Examination Of Alternative-Response Discrimination Training And Resurgence, Kaitlyn O. Browning

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Individuals with neurodevelopmental disorders such as autism spectrum disorders often engage in severe forms of problem behavior. Reward-based behavioral interventions are highly effective at reducing levels of problem behavior and teaching more appropriate and adaptive alternative behaviors. Despite successful reduction in problem behavior during treatment, problem behaviors are susceptible to reoccurrence or relapse. Resurgence is a type of behavioral relapse that is particularly relevant to the treatment of problem behavior and may occur following the worsening of conditions of a more recently learned alternative behavior. That is, if the rewards that were used to teach the alternative behavior are removed …