Digital Commons Network^™

Sheaf Theory As A Foundation For Heterogeneous Data Fusion, Seyed M-H Mansourbeigi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A major impediment to scientific progress in many fields is the inability to make sense of the huge amounts of data that have been collected via experiment or computer simulation. This dissertation provides tools to visualize, represent, and analyze the collection of sensors and data all at once in a single combinatorial geometric object. Encoding and translating heterogeneous data into common language are modeled by supporting objects. In this methodology, the behavior of the system based on the detection of noise in the system, possible failure in data exchange and recognition of the redundant or complimentary sensors are studied via …

The Development Of Hydrodynamic And Kinetic Models For The Plasmasphere Refilling Problem Following A Geomagnetic Storm, Kausik Chatterjee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this dissertation is the development of computer simulation-based models for the modeling of upper ionosphere, starting from the first principles. The models were validated by exact analytical benchmarks and are seen to be consistent with experimentally obtained results. This area of research has significant implications in the area of global communication. In addition, these models would lead to a better understanding of the physical processes taking place in the upper ionosphere.

Sensitivity Of The Opal Instrument For Gravity Wave Detection, Kenneth I. Zia

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Knowing what goes on in the upper atmosphere (∼80-140 km) is very important to the space science community. There are several competing forces that influence the temperature and densities of neutral molecules in that region. OPAL (Optical Profiling of the Atmospheric Limb) is funded by the National Science Foundation (NSF) to measure the temperature there using light from oxygen molecules (∼760 nm). To accomplish this,OPAL is built into a CubeSat (a satellite the size of a loaf of bread) to be launched from the International Space Station (ISS) at an altitude of about 400 km. This vantage point is needed …

Evaluating The Role Of Nonmonetary Factors In Teachers' Employment Decisions, Jeffrey M. Gunther

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Teacher recruitment and retention is a problem of perpetual concern among education policymakers. High rates of teacher attrition, particularly within the first few years of a teacher’s service have been of particular concern. It is believed that persistent teacher shortages contribute both to underperformance of students generally, as well as to achievement gaps between students of different races and socioeconomic backgrounds. The importance of this issue has led to a great deal of research in the field, which has found that there are a large number of factors that influence the desirability of schools to teachers. What is still unclear …

Understanding A Therapist's Way Of Being: A Modified Delphi Study, Kaity Pearl Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research has indicated that there are certain ingredients that make therapy successful. One of these ingredients may be the actual therapist providing the therapy. The concept of a person’s way of being appears in some literature, but the concept of therapist way of being has not been well developed and explored. The purpose of this study was to form a definition of therapist way of being, to gain an understanding of how way of being influences a client’s change in therapy, and to describe and ways of being that are beneficial and detrimental to a client’s journey of change.

Data …

Insomnia And Use Of Sleep Medications In Predicting Risk Of Alzheimer's Disease In The Cache County Study, Elizabeth Kathleen Vernon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Over 71 million Americans will be over the age of 65 by the year 2030. With this rise in adults aged 65 years and older also comes an exponential rise in the estimated number of individuals with Alzheimer’s disease (AD); this number is expected to exceed 24 million Americans by the year 2040. The number one risk factor for AD is older age; this factor is also associated with an increased risk in developing a sleep disturbance. Sleep disturbances have been associated with an increased risk of cancer, heart disease, and decline in overall health. Recent research has examined the …

Maternal Depression In The United States: A Geographic Comparison Between Geographic Regions And Rurality, Samantha J. Patterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Health disparities exist between rural and urban areas but geographic comparisons of mental health are less studied and conclusive. Maternal depression has not been examined by region or rurality in the United States but might be influenced by geographic locations due to the variance of social support and healthcare available in some locations compared to others. The research focuses on (1) whether rurality increases a mother’s risk of experiencing depression and (2) if region impacts a mother’s risk of depression. I used the NESARC-III data that included three general depressive disorders: major depressive episode, major depressive disorder, and dysthymia. Regions …

The Nesting Ecology Of Woodpeckers In The Eastern Cascades And Their Interactions With Nest Competitors And Predators, Samuel D. Cowell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Woodpeckers create nesting cavities for other birds and animals in forests. This creates dynamic interactions between both woodpeckers and these other animals. Using video cameras, we documented direct behavioral interactions between nesting woodpeckers and other animals in the Eastern Washington Cascades during the 2015 and 2016 breeding seasons. Additionally, we offered 937 students in a General Biology laboratory course to participate in this original research opportunity and described and the impact the experience had on the participants as well as the researchers.

In 2015, Western Blubebirds took over two active Black-backed Woodpecker nests by physically attacking the woodpeckers. In 2016, …

Renewable Portfolio Standards And Environmental Goals, Josh T. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Renewable portfolio standards (RPS) are one of the most common state policies meant to encourage clean energy use. They require that utilities purchase electricity from certain qualifying electricity generators, usually with no reference to the cost of that electricity. AlthoughRPS are meant to clean up electricity generation through using clean energy sources instead of fossil fuels, they may not do so effectively. Further, some energy companies may lobby state legislators to include their energy sources regardless of their actual environmental benefit. The actual relationship between enacting an RPS and a state’s emissions from energy production is unclear. I explore RPS …

Investigation Of The Molecular Mechanisms Of The Shigella Type Iii Secretion System Tip Complex, Abram R. Bernard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Shigella are bacteria that are responsible for millions of infections and hundreds of thousands of deaths every year. The emergence of antibiotic resistant Shigella adds to the potentially devastating effect that these bacteria can have on human health. Shigella flexneri utilize specialized molecular machinery called the Type III secretion system to infect humans and cause disease. Research of this machinery promises to provide the knowledge, tools, and direction for the development of new avenues to combat shigellosis. This dissertation presents studies of two Shigella proteins, invasion plasmid antigens C and D (IpaC and IpaD). These proteins are part of a …

Comparing Performance Of Gene Set Test Methods Using Biologically Relevant Simulated Data, Richard M. Lambert

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Today we know that there are many genetically driven diseases and health conditions. These problems often manifest only when a set of genes are either active or inactive. Recent technology allows us to measure the activity level of genes in cells, which we call gene expression. It is of great interest to society to be able to statistically compare the gene expression of a large number of genes between two or more groups. For example, we may want to compare the gene expression of a group of cancer patients with a group of non-cancer patients to better understand the genetic …

Energy And Risk: Discourse, Framing, And Content, Temis Gardner Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research examined how people communicate and create knowledge about energy-related risks. Analysis of the discourse, frames, and content surrounding unconventional energy policy and development in the Western United States was conducted using three case studies. The results contribute to an understanding of energy-related risk perceptions in social and historical contexts.

Discourses contained in newspapers and public comments to the Bureau of Land Management presented arguments on the basis of risks to the environment; climate; human health and safety; jobs and economic prosperity; property rights; and local governments. Governments were seen as risks when they were perceived to allow misuse …

The Intergenerational Transmission Of Parental Practices That Influence The Educational Outcome Of Latinxs In The United States, Ana E. Kemple Reeves

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parental involvement practices in education have traditionally referred to overt forms of involvement such as attending school meetings, parent teacher conferences, and volunteering at the school. Research suggests that Latinx parents do not utilize these approaches as much as they do subtler practices. These practices are manifested in parents’ communication with their children, their parenting styles, and the academic expectations they place on their children. The current study intended to recognize the parental practices used by Latinx parents that contribute to educational attainment and combat fixed beliefs regarding their lack of involvement in their children’s education. The data collection was …

Justice And The River: Community Connections To An Impaired Urban River In Salt Lake City, Taya L. Carothers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Local communities have the right to participate in decision-making about environmental resources near where they live. Local governments have tried to gather feedback from communities to help improve the decisions they make, but have not always done a good job getting feedback from minority or urban communities. This dissertation provides one step toward obtaining this kind of public input in a majority minority community surrounding the Jordan River in Salt Lake City. Children and adults participated in this research. I present findings from two surveys, from work with children, and from adult interviews to understand how this community relates to …

“I Really Don’T Look For Certifications, It All Has To Do With Personal Relationships”: The Construction Of A Meat Philosophy And Innovation Adoption By Culinary Professionals In The Rocky Mountain Region, Kailie B. Leggett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Demand for new methods of beef production is rising due to concern over potential impacts on human health, animal welfare, and the environment. Researchers at Utah State University have developed a method of beef production from cattle finished on tannin-containing legume forages in the Rocky Mountain Region in order to address those concerns. To ensure success of this product, the demand and marketability needed to be assessed. Food values addressed through new production standards and certifications are communicated through labeling by culinary professionals in the kitchen and behind service counters. This research study utilized qualitative methods to understand how culinary …

Sparse Signal Recovery Based On Compressive Sensing And Exploration Using Multiple Mobile Sensors, Mohammad Shekaramiz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The work in this dissertation is focused on two areas within the general discipline of statistical signal processing. First, several new algorithms are developed and exhaustively tested for solving the inverse problem of compressive sensing (CS). CS is a recently developed sub-sampling technique for signal acquisition and reconstruction which is more efficient than the traditional Nyquist sampling method. It provides the possibility of compressed data acquisition approaches to directly acquire just the important information of the signal of interest. Many natural signals are sparse or compressible in some domain such as pixel domain of images, time, frequency and so forth. …

Inorganic Electrocatalysts For Innovative Water Splitting And Organic Upgrading, Nan Jiang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The booming worldwide demand for energy and the increasing concerns about global warming due to fossil fuel consumption have urged the development of techniques for storing and converting renewable and clean energy resources. Electrocatlytic or photoelectrocatalytic water splitting to generate green energy carrier H₂ with sustainable energy input, like solar, has been regarded as an attractive strategy for carbon-neutral energy needs. However, the sluggish kinetics for both half reactions (HER and OER), high overpotentials and thermodynamic requirements, and H₂ and O₂ gas crossover have been regarded as the major challenges, which limit its widespread application.

On account …

Mesospheric Gravity Wave Climatology And Variances Over The Andes Mountains, Jonathan Rich Pugmire

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Look up! Travelling over your head in the air are waves. They are present all the time in the atmosphere all over the Earth. Now imagine throwing a small rock in a pond and watching the ripples spread out around it. The same thing happens in the atmosphere except the rock is a thunderstorm, the wind blowing over a mountain, or another disturbance. As the wave (known as a gravity wave) travels upwards the thinning air allows the wave to grow larger and larger. Eventually the gravity wave gets too large – and like waves on the beach – it …

Identification And Engineering Of Nonribosomal Peptide Biosynthetic Systems, Fuchao Xu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research focuses on the understanding and engineering of nonribosomal peptide biosynthetic pathways in Streptomyces coelicolor CH999, Escherichia coli BAP1 and Saccharomyces cerevisiae BJ5464-NpgA. The biosynthetic systems of indigoidine from bacteria and beauvericin/bassianolide from fungi were studied in this research. The production of these valuble products was significantly increased by enhancing their synthetic pathway with metabolic engineering approaches.

Indigoidine is a bacterial natural product with antioxidant and antimicrobial activities. Its bright blue color resembles the industrial dye indigo, thus representing a new natural blue dye that may find uses in industry. Indigo is a dark blue crystalline powder and has …

Carbon Monoxide On Demand: Light-Induced Co Release Of Flavonols, Stacey N. Anderson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Carbon monoxide (CO) is an extremely useful molecule with applications in industrial manufacturing, synthetic procedures as a C1 building block, and as a potential pharmaceutical to produce anti-inflammatory effects and vasodilation. However, the toxicity associated with CO has prevented its full utilization. In order to safely handle CO, compounds and molecules have been developed that act as storage materials for the gas. Ideal storage platforms only release CO upon stimulation via a trigger. Light activation is the most desirable trigger as it can be regulated in terms of the intensity and the wavelength of light used. The majority of light-induced …

Blue And Red Light Effects On Stomatal Oscillations, Trevor R. Ballard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plants absorb CO₂ through pores in their leaves called stomata, which are known to open and close in response to myriad environmental and physiological triggers. We demonstrate that blue light inhibits stomatal aperture oscillations in both the guard cells and surrounding tissue layers, whereas these oscillations continue under the influence of red light. This observation of blue light behavior agrees with recent research and suggests another physiological pathway for oscillations.

Spatial Ability Degradation In Undergraduate Mechanical Engineering Students During The Winter Semester Break, Benjamin J. Call

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spatial ability represents our ability to mentally arrange, rotate, and explore objects in multiple dimensions. This ability has been found to be important for engineers and engineering students. Past research has shown that many interventions can be created to boost an individual’s spatial ability. In fact, past research has indicated that engineering students significantly increase in spatial ability without an intervention while they are enrolled in certain engineering courses. Some researchers have claimed that the spatial ability boosts are permanent after an intervention. However, most researchers do not check the validity of that claim with continued assessment after more than …

Development Of An Improved Low-Order Model For Propeller-Wing Interactions, Joshua Taylor Goates

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For aircraft that have propellers mounted in front of the wings or tail, the prop wash produced by the propellers can have a strong influence on the aerodynamics of the aircraft. As the accelerated air from the propeller flows over the wings and tail, it can cause an alteration in the aerodynamic forces produced by those surfaces. Thus, an understanding of propeller-wing interactions is essential for the design and analysis of many aircraft.

There are multiple existing methods for analyzing the propeller-wing interactions. High order methods, such as wind tunnel testing or computational fluid dynamics, provide very accurate results but …

The Macroinvertebrate And Fish Communities Of In-Stream Beaver Ponds In Northeastern Utah, Susan Washko

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Beavers were virtually extirpated from North America during the fur trade, but populations have since recovered. Dams built by recolonizing beaver alter stream habitat by forming deep, slow ponds within the streams. Such changes to the habitat is likely to have consequences for organisms such as macroinvertebrates and fish. The objective of this study was to identify the differences in the macroinvertebrate and trout community in beaver ponds and lotic (e.g. flowing reaches of a stream) reaches in tributaries to the Logan River in northeastern Utah. The macroinvertebrate community of beaver ponds had fewer species, fewer numbers, and lower biomass …

Examining Teacher Perceptions When Utilizing Volunteers In School-Based Agricultural Education Programs, Ashley B. Cromer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There has been little research conducted related to how school-based agricultural (SBAE) teachers perceive the utilization of volunteers in the classroom. The United States is facing a shortage of SBAE teachers, and with turnover rates that are not sustainable, solutions for support and reduction of the SBAE teachers’ workload must be sought with diligence. There is potential for volunteers to reduce some of the responsibilities that the SBAE teacher is faced with. The purposes of this study are to determine the demographic characteristics of the volunteers being utilized and of the SBAE teachers, determine the perceived benefits, barriers and beliefs …

The Heat Is On! Perspectives And Practices Regarding Extreme Heat Risk, Emily D. Esplin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Remembering negative experiences with extreme heat may promote future protective actions and provide insight to improve heat risk awareness and communication practices. This two-part thesis found 1) that experiencing heat-related health symptoms predicted what Americans would do to protect themselves and others during subsequent heat waves; and 2) that Utah professionals regard heat-related experience as an important factor in how they responded to extreme heat events.

In the first study, a US national survey showed that personal experience with heat-related health symptoms was related to the tendency to say that one engaged in different protective behaviors, while other factors like …

Investigating Rapid Concrete Repair Materials And Admixtures, Ivan Quezada

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation presents a literature review of the state-of-practice for the use of IC in concrete mixtures and how structural engineers and construction engineers can adapt IC to their present and future work. Current high early strength concrete mixtures have natural cracking and shrinkage problems due to the high content of cementitious material or their chemical components. Using IC allows for early strength, enhanced durability, reduced shrinkage and a better curing by providing water that can be absorbed by the cement past after the final set. Rapid hydration and high early strength Portland cement and calcium sulfoaluminate (CSA) concretes are …

The Power Law Distribution Of Agricultural Land Size, Lauren Chamberlain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This paper demonstrates that the distribution of county level agricultural land size in the United States is best described by a power-law distribution, a distribution that displays extremely heavy tails. This indicates that the majority of farmland exists in the upper tail. Our analysis indicates that the top 5% of agricultural counties account for about 25% of agricultural land between 1997-2012. The power-law distribution of farm size has important implications for the design of more efficient regional and national agricultural policies as counties close to the mean account for little of the cumulative distribution of total agricultural land. This has …

Thallium Removal From Drinking Water Using Pyrolusite Filter Media, Erin R. Andersen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thallium (Tl) is a rare heavy metal in drinking water, but its extreme toxicity makes its removal crucial to consumer health. Traditional treatment methods do not work for Tl in sources with high concentrations of ions like calcium (Ca⁺²) and potassium (K⁺), as they are removed preferentially to Tl. A treatment method that specifically targets Tl must be applied. Pilot studies conducted in Park City Utah found that pyrolusite, a manganese oxide ore, will remove Tl to very low concentrations in the presence of competing ions but because this method is not common, further study was …

Demand Disaggregation For Non-Residential Water Users In The City Of Logan, Utah, Usa, Nour Aldin Mahmoud Attaallah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Non-residential users contribute to a significant portion of the total water delivered by water supplying agencies. However, a very limited number of studies have attempted to investigate the water use behavior of non-residential users. With the emergence of newer “smart” meters, water use now can be measured and recorded at a very high temporal frequency. Smart meters can help determine total water use, timing, and component end uses to better understand water use practices by non-residential users.

Water end use disaggregation is the process of separating the water used by each fixture or process within a facility. This is useful …