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Breast Ultrasound Image Segmentation Based On Uncertainty Reduction And Context Information, Kuan Huang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Breast cancer frequently occurs in women over the world. It was one of the most serious diseases and the second common cancer among women in 2019. The survival rate of stages 0 and 1 of breast cancer is closed to 100%. It is urgent to develop an approach that can detect breast cancer in the early stages. Breast ultrasound (BUS) imaging is low-cost, portable, and effective; therefore, it becomes the most crucial approach for breast cancer diagnosis. However, BUS images are of poor quality, low contrast, and uncertain. The computer-aided diagnosis (CAD) system is developed for breast cancer to prevent …

Wildland Fire Risk Perceptions And Mitigation Actions In The Western United States: A Systematic Literature Review And Two Empirical Case Studies, Lauren Nicole-Dupéy Larsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Individuals are continuing to move into previously uninhabited, wildlands in the Western United States where fire danger is often high. This continued movement of people is a two-fold problem. First, individuals are moving into areas that have dense forestland and other flammable vegetation types where wildfires can easily ignite and spread. Second, individuals are starting more wildfires in these previously uninhabited areas (over 90% of wildfires across the country are caused by humans). Although wildfire is a complex topic, one thing is simple: As individuals continue to move into these wild, forested, and often mountainous areas, the risk of these …

The Role Of Social Movements In Female Candidacy Decisions, Meg Elizabeth Rasmussen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the impact of the 2017 Women’s March and women’s feelings towards President Donald Trump on female candidacy in the 2018 midterm elections was conducted to observe the emergence of new pathways to candidacy and further understanding political ambition in women. This closely follows social movement literature on political opportunities and changes in mobilizing structures as well as literature on nascent political ambition. Understanding the things that encourage more women to run for office can help increase descriptive representation in the United States and create a more representative democracy.

The methods of observing the phenomenon of the 2018 …

Accessing Healthcare In The Intermountain West During The Age Of Precarious Labor, Jordan Hammon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research aims to improve our understanding about the association between precarious employment and healthcare access. Using the framework of neoliberalism and the history of welfare reform in the United States, this thesis investigates the relationship between precarious labor and two outcomes associated with health insurance access, namely Medicaid utilization, and being uninsured. I also examine one potential consequence of Medicaid utilization and lack of insurance, having a usual place of health care in the context of the Intermountain West region of the United States.

Using new survey data and quantitative methodologies, this research shows how economic changes, particularly related …

Relationship Pacing In Adolescents Before And After A Relationship Education Course: Considering The Influence Of Demographics, Relationship History And Well-Being, Sarah Hodgskiss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adolescence is a time when many individuals begin to participate in dating. Adolescent romantic relationships can have benefits for youth but can also be harmful if they do not have the information and skills needed to form and maintain healthy relationships. This study analyzed survey data from a youth relationship education program entitled the Premarital and Interpersonal Choices and Knowledge (PICK) program from a group of 14,468 adolescents. This study examined how different demographics were associated with decision making in relationships, referred to as relationship pacing in this study, before participating in the course. Demographic factors that were included were …

Gender And Political Incentives: Examining The Applicant Pool Under Merit Selection, Logan M. Loftis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Merit selection is a judicial selection system for when a state’s constitution or statute directs an independent nominating commission to evaluate applicants as a precursor to gubernatorial appointment. The initial process to fill a judicial vacancy under merit selection has three steps: application, nomination, and appointment. Proponents of the selection system insist that by de-emphasizing politics and highlighting qualifications, judicial diversification will be more likely to increase under merit selection. Yet, there is not a clear consensus as to whether merit selection systematically engenders a more diverse bench.

In this thesis, I explore whether women are less likely to apply …

Exploring Analytical Issues Associated With Oxidation Kinetics In Drinking Water, Shadi Haji Eghrari

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation contains two different section that pertain to two different subjects.

Section One (Haloamines): Disinfection with ozone and chlorine is critical in protecting the public and animals from pathogens in pools. Disinfection results in in the formation of haloamines from the unintended reactions of human and animal inputs and bromide/chloride with oxidants and disinfectants which cause health problems.

The purpose of this research was to examine the occurrence of haloamines during the chlorination of saltwaters. In this study, the effect of bromide concentration was observed to exert a significant effect on the stability of Haloamines, and with no bromide …

Effects Of Military And Economic Aid On Terrorism: A Long- And Short-Term Analysis, Haley Parker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This paper asks whether U.S. aid reduces terrorism. Foreign assistance may be of two types: socio-economic aid (aims to address the root causes of terrorism by improving health care, education, justice systems, infrastructure, etc. in the recipient country) and military aid (designed to fight terrorism with force and manifests as military operations in a recipient country). Most countries receive both military aid and socio-economic US aid for long spells of time. This is why this research asks: 1) how economic and military types of aid influence terrorism over time, and 2) whether and how economic aid and military types of …

School-Based Acceptance And Commitment Therapy For Adolescents With Anxiety, Julie M. Petersen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mental health problems, particularly anxiety, are a growing problem in adolescents. Some treatments (e.g., cognitive behavioral therapy) have been shown effective for youth anxiety, but do not help all adolescents. Acceptance and commitment therapy (ACT), a treatment supported for anxiety in adults, has yet to be fully researched in adolescents. ACT is a flexible therapy that is understood to be appropriate, if not ideal, for younger populations and schools. The present study compares a school-based, group ACT for adolescents with anxiety to a waitlist.

Adolescents (N = 26) with anxiety were randomized to a 12 week waitlist or to participate …

Parents' Perceptions Of Life Skill Development And Satisfaction With Utah 4-H, Oakley G. Perry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The 4-H program is the nation’s largest youth development program with near six million members nationwide. Utah 4-H provides this program to the residents of Utah through Utah State University’s Extension Service. The program focuses on teaching life skills to youth to prepare them for their future using hands on educational programs tied to project areas, or particular topics like equine science or fine arts. Utah 4-H has many different stakeholders, one of which being the parents of its members. For youth programs to continue to be successful, these programs must show stakeholders their significance and ensure that its audience …

Understanding Teacher Sense-Making Discourse During Collaborative Professional Development Of An Expansively-Framed Computer Science Curriculum, Courtney Stephens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Elementary school teachers are being increasingly asked to teach computer science—something that most teacher certification programs do not prepare them for. In an attempt to study how elementary teachers learn to teach computer science, I analyzed the ways that teachers behaved during a professional development accompanying the implementation of a fifth-grade computer science curriculum. My findings suggest that teachers benefit from professional development that encourages collaboration and active participation in teachers through discussion and modeling. Furthermore, my findings suggest that teachers benefit from using curriculum that deliberately connects new concepts to content that they are already familiar and comfortable with—a …

Algorithms For Covering Barrier Points By Mobile Sensors With Line Constraint, Princy Jain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this thesis, we develop efficient algorithms for the problem of covering barrier points by mobile sensors. Each sensor is represented by a point in the plane with the same covering range r so that any point within distance r from the sensor can be covered by the sensor. Given a set B of m points (called “barrier points”) and a set S of n points (representing the “sensors”) in the plane, the problem is to move the sensors so that each barrier point is covered by at least one sensor and the maximum movement of all sensors is minimized. …

Concrete Maturity Method Applied To Rapid-Setting Calcium-Sulfoaluminate (Csa) Concretes For Pavement Repair Under Different Ambient Temperatures, Ryan Nicholas Langford

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With more and more people using roadways the need for fast and efficient repair work is becoming increasingly important. Lane closures impede traffic flow and result in congestion. To further limit the amount of time lane closures are needed for repair work, calcium sulfoaluminate (CSA) cement concrete has become an increasing popular construction material for its ability to reach adequate strength requirements within four hours. Because of this accelerated repair time, advanced testing methods are needed to verify that the replaced concrete does indeed meet or exceed the minimum compressive strength requirements.

The maturity method is one test used to …

Big Fires, Big Trees, And Big Plots: Enhancing Our Ecological Understanding Of Fire With Unprecedented Field Data, Tucker J. Furniss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wildfire is an inexorable process in western landscapes, posing a major challenge to land managers: how can we use fire to restore healthy forests without jeopardizing human communities? The purpose of this dissertation is to produce research that will help guide management and support effective wildland fire use in fire-prone forests.

I utilized a longitudinal dataset from a single, large forest plot that burned under serendipitous circumstances during the 2013 Rim Fire. My research revealed that post-fire mortality models under-predict mortality of large trees, and may need to be re-calibrated to perform well under future climates. I used satellite-derived data …

Foliar Photodegradation In Pesticide Environmental Modeling, Sean M. Lyons

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The work described here was conducted to better understand how pesticides will behave following their application to crops or soil. This understanding will allow for better use of pesticides which will protect the environment and non-target organisms while remaining effective against pests. The Pesticide Dissipation form Agricultural Land (PeDAL) model was developed to simulate pesticide behavior following application and laboratory experiments focused on the photodegradation of select pesticides on alfalfa leaves were conducted to support this model.

Development And Application Of A Decision Framework To Support Improved River Basin Water Management, Leah Meeks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Water management decisions made at local levels may have effects throughout an entire river basin. Water managers need better ways to help identify which decisions have broader implications and to quantify those effects to inform decision making. This dissertation presents a framework providing a basin-wide approach to water management using three studies. The first study developed a software tool to quantify how local changes within a water resources network affect the entire network. A case study was conducted on the Lower Bear River in Utah. The second study quantified the basin-wide effects of reducing return flows from irrigation areas to …

The Rhetoric Of The Double-Voiced: Strategic Ambiguity In The Silent Protest Parade, Shelby R. Crow

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Examinations of historical social movements offer great insight into contemporary social justice activism. In this thesis, I analyzed the Silent Protest Parade of 1917. The Silent Protest Parade consisted of approximately 10,000 African American men, women, and children who marched in complete silence to illuminate racial violence and the lynchings of African Americans. I argued that through the concept of strategic ambiguity, protesters were able to communicate between African American and powerful White audiences, many of whom held racist beliefs and attitudes.

Methods Development, Design Analysis, And Testing Of Novel Centrifugal Devices For Mammalian Cell Culture Harvest, W. Aaron Dryden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thermo Fisher Scientific is developing a centrifugal device to be used in the biopharmaceutical industry. The novel technology was used to remove cells from cell cultures, which produce drugs and medical treatments. The harvest process of removing cells is the first step towards product purification and is an important unit operation for ensuring high product yield. Since the device is a novel technology, methods to test and evaluate the performance of the centrifuge needed to be developed.

Successful testing methods were developed in this work and were implemented on over 30 different centrifuge designs. Amongst these many designs, different operating …

Constraining Deformation Mechanisms Of Fault Damage Zones: A Case Study Of The Shallow San Andreas Fault At Elizabeth Lake, Southern California., Caroline Studnicky

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Earthquakes nucleate at depth and rupture along the fault plane up to the Earth’s surface releasing seismic energy as the fault propagates. This energy creates the shaking we feel on the surface. Some faults do not rupture and create shaking but deform slowly and smoothly accommodating fault slip over extended time periods. This process is referred to as aseismic slip or creep. Whether a fault ruptures or creeps depends on the properties of the rocks through which the fault plane extends. In order to model seismic hazards correctly, we need to characterize the composition, deformation structures, and alteration materials of …

Generation Of Sheep Models Of Cystic Fibrosis By Gene Editing And Cloning, Iuri Viótti Périssé

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cystic Fibrosis (CF) is a genetic disease that affects over 80,000 people worldwide and is caused by mutations that disrupt the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene. This gene encodes a channel protein that regulates ion transport in cells. The most common mutation in the human CFTR gene is F508del, which is characterized by the deletion of a phenylalanine amino acid in the CFTR protein. The second most common mutation is G542X, a protein synthesis “stop” mutation that prevents the production of the CFTR channel protein. An impediment that prevents the further understanding CF is the limited …

Examining The Use Of Culturally Relevant Pedagogy In Undergraduate Mathematics Learning Modules With Students Of Color, Thomas A. Mgonja

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In mathematics, Students of Color have persistently performed lower than their White counterparts, thus creating a need to explore instructional methods that could reduce performance disparities. This study investigated culturally relevant pedagogy (CRP) to understand how it might support students’ mathematics learning in undergraduate mathematics learning modules. The overarching research question focused on how CRP in undergraduate mathematics Learning Modules supported students’ mathematics learning. There were also two main questions that focused on participants’ evaluations of the CRP modules and how those evaluations were reported based on subgroups (Students of Color and White). The researcher employed a sequential explanatory mixed-methods …

Understanding Community Resilience Resources And Experiences Of Inequity Within The Lgbtq+ Community: Implications For Identity And Mental Health Disparities, Joshua G. Parmenter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Being a part of the lesbian, gay, bisexual, transgender, and queer plus (LGBTQ+) community has been linked with positive well-being. Research has established that the LGBTQ+ community has community-level resources (e.g., connection, belonging, shared hardships) that sexual and gender diverse people can utilize to cope in the face of discrimination (i.e., community resilience). However, due to various forms of discrimination and oppression, those with marginalized identities within the LGBTQ+ community (i.e., LGBTQ+ people of color, plurisexual, gender diverse) may not have equal access to LGBTQ+ community resilience resources.

This dissertation is composed of three separate studies aimed at understanding sexual …

Susceptibility Of High-Elevation Forests To Mountain Pine Beetle (Dendroctonus Ponderosae Hopkins) Under Climate Change, David N. Soderberg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Across western North America, pine forests are important for timber, wildlife habitat, and at high elevations are important for water retention and yield from rain and snowmelt. The mountain pine beetle (MPB) is one of the most significant disturbance agents shaping pine forests, and like all insects, temperature is a major driver of its population success and the dynamics of the landscapes that they inhabit. Changing temperature regimes can therefore directly influence MPB population persistence at a particular location, in addition to potential shifts in the range boundaries that they inhabit. MPB is currently expanding its range northward in British …

Surrogate Optimization Model For An Integrated Regenerative Methanol Transcritical Cycle, Yili Zhang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In order to reduce the cost ($) per megawatts hour (MWh) of electrical energy generated by a nuclear power cycle with a novel small modular reactor (SMR), a new SMR-based nuclear power cycle with Methanol as working fluid was designed. It was built virtually with the Python & Coolprop software based on all components’ physical properties, and it is therefore called the physics-based model. The physics-based model would require seven user-defined values as input for the seven free design parameters, respectively. The physics-based model outcomes include LCOE (the cost per megawatts hour of electrical energy generated by the …

The Periaqueductal Grey In Opioid Tolerance And Chronic Pain, Akila Ram

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pain is the body’s natural warning system to indicate one is in an environment highly detrimental to survival. The body’s response to the sensation of pain is to immediately withdraw from this environment, ensuring continued survival. However, when pain lasts beyond the window in which it is useful, it no longer serves as a helpful warning system but instead degrades the quality of life. Chronic pain leads to patients seeking opioids to alleviate their condition and regain control of their lives. A severe negative side effect of the use of opioids to treat chronic pain is the development of tolerance …

Synergistic Effect Of High Intensity Ultrasound, Antimicrobial Compounds, And Uv-A Light On Microbial Quality Of Dairy Products, Bryce Rodney Hales

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Food spoilage and contamination remains a common problem within the food industry. Furthermore, the continued change of consumer demand and perspective on food quality and products has led the food industry and researchers to find new methods of food preservation. Many of these new methods hope to use non-thermal processes since thermal processes tend to decrease the overall quality of the final product. Some new non-thermal methods that have been looked at are the use of high intensity ultrasound (HIU), ultraviolet light, and the use of natural antimicrobials. In this study, UHT milk inoculated with either E. coli K12 or …

Season Advancement Of Cool Season Cut Flower Crops Snapdragon And Peony, Maegen A. Lewis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Demand and production of specialty cut flowers is growing across the U.S., but research is lacking in the U.S. Intermountain West, where the semi-arid and high elevation climate offers unique challenges for growers. The goal of this study was to evaluate the stem quality, harvest timing, and yield of snapdragon (Antirrhinum majus) ‘Chantilly’, ‘Potomac’, and ‘Rocket’ and peony (Paeonia lactiflora) ‘Coral Charm’ as cool-season cut flower crops under high tunnel and field production in North Logan, Utah. Snapdragons were transplanted at three-week intervals beginning in early-February in high tunnels and ending in late-May in the field. …

The Moderating Effect Of Intraoffice Group Dynamics On The Ambulation Of Sms-Prompted Utah Tech Professionals, David Collins Moore

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research examined the extent to which group membership affects the impact of text message activity prompts on daily step count. Two 17-member convenience samples were recruited from various software companies in Utah. The participants in the cohesive group unit sample worked in close proximity to one another in a single office, while the lone participants were recruited from and worked in separate offices. Participants’ daily step count baselines were established during the initial 2 weeks of the experiment, after which they were sent text message activity prompts twice per workweek day for the remaining 4 weeks. Step count data …

Clothing Construction Curriculum: Exploring Gender Inclusivity, Shaelin M. Nilsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Female students have traditionally dominated enrollment in Family and Consumer Sciences (FCS) courses (formerly Home Economics). However, gender diversity has recently increased in many FCS areas due to changes in gender stereotypes and career opportunities. This trend is evident at Utah State University, where gender diversity in clothing construction (i.e., sewing) courses has increased drastically since the creation of the Outdoor Product Design and Development degree program. This study evaluated students’ experiences in traditionally female-dominant clothing construction courses.

Gender-inclusive courses are crucial for a productive and safe learning environment for all students. Avoiding personal biases and cultivating a relevant curriculum …

Using Unmanned Aerial Vehicles To Quantify Erosion Control Measures On A Reclaimed Central Utah Coal Mine, Christopher R. Brown

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For certain landscape reclamation efforts surrounding, the Utah Division of Oil Gas and Mining (UDOGM) utilizes a surface roughing technique called “pocking”. The process of pocking establishes closely spaced gouges approximately 1.2 meters in diameter and 0.5 meters deep across a reclaimed landscape in order to reduce surface erosion and promote plant growth on steep terrain in arid regions. Pocks are designed as a series of micro watersheds that trap water to aid in plant establishment and reduces overland flow of water. Over time vegetation grows within the pocks as they infill with sediment. While this method is considered an …