Digital Commons Network^™

Optimizing Bioengineered Vascular Systems: A Genetic Algorithm Approach, Sima Mehri Kochaki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Efficiency of current cell cultures producing biological products is limited due to accumulation of the product and waste on the cells. A previous work aims at assisting bioengineers in solving this problem by introducing a new set of cells which possess the ability to connect to one another and thus form a network. Once created, the network of cells can help the initial cellules by removing their waste and product as well as nourishing them. Our project explores a technique to be able to create the best network of such cells; hence maximizing the amount of metabolic product in the …

Integrating Social And Ecological Methods To Assess And Inform Park Monitoring And Management, Kelly A. Goonan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Managing outdoor recreation requires that managers do the following: (1) consider the user experience, environmental and cultural resources, and type and intensity of management actions; (2) specify desired conditions to be maintained, monitor conditions, and take appropriate action if unacceptable impacts occur; (3) adapt to new conditions and information; and (4) exercise good judgment based on their professional experience and the best information available to them. Social science studies of visitors and studies of significant recreation resources like campsites are important sources of information for managers and are commonly used in parks and protected areas to support planning and decision-making. …

Relationship Between The Built Environment, Physical Activity, And Chronic Disease Among Individuals With Disabilities In Rural Communities, Nicholas F. Tanner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increased risk for chronic disease is closely associated with individual nutrition, tobacco use, and physical inactivity. This thesis focuses on physical activity as a means of preventing select chronic diseases. A major barrier preventing engagement in physical activity is the built environment. Populations residing in rural environment are not afforded the abundance of opportunities for physical activity prevalent in most urban networks. Of the demographic living in rural environments, individuals with disability face additional barriers to physical activity than those without disability. This leads to a higher prevalence of chronic diseases associated with sedentary lifestyles among populations with disability. Few …

Effects Of Parent Training On Increased Knowledge And Changes In Perceptions Regarding Transition To Adulthood For Middle School Youth With Disabilities, Lauren E. Wright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parents of children with severe/moderate disabilities experience uncertainty and a lack of knowledge as their children go through the transition to adulthood. Research has shown parents play a key role in their child's postschool outcome success and that parent training and beginning transition preparation early are key predictors. This study examined the effects of parent training on parents' knowledge, expectations, and action towards their child's transition to adulthood. Participants consisted of parents of middle school youth with severe/moderate disabilities. The study measured parent knowledge, expectations, and actions. Procedures involved (a) a pretest administered to parents on their transition knowledge, (b) …

Building Community Using Experiential Education With Elementary Preservice Teachers In A Social Studies Methodology Course, Stephanie L. Speicher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There is urgency for teacher educators to instruct preservice teachers in the core tenants of social justice education. This urgency is based upon the ever-growing shift in the American demographic landscape and the responsibility of educators to teach for equity, justice, identity and community within classrooms across the U.S. Preservice teachers report feeling inadequately prepared to educate for social justice when entering the formal classroom setting. Feelings of incompetence in social justice teaching pedagogy expressed among preservice teachers coupled with minimal examination in the literature of the effects of teacher education practices that aid in the readiness to teach for …

Facilitation Of Nanoscale Thermal Transport By Hydrogen Bonds, Lin Zhang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thermal transport performance at the nanoscale and/or of biomaterials is essential to the success of many new technologies including nanoelectronics, biomedical devices, and various nanocomposites. Due to complicated microstructures and chemical bonding, thermal transport process in these materials has not been well understood yet. In terms of chemical bonding, it is well known that the strength of atomic bonding can significantly affect thermal transport across materials or across interfaces between materials. Given the intrinsic high strength of hydrogen bonds, this dissertation explores the role of hydrogen bonds in nanoscale thermal transport in various materials, and investigates novel material designs incorporating …

From "Struggling" To "Example": How Cross-Age Tutoring Impacts Latina Adolescents' Reader Identities, Dustin H. Drake

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Educators and policy makers have shown a consistent concern over the achievement gap. In academic assessments, Latino students have demonstrated lower achievement than their peers, particularly in reading scores. Many researchers attribute the existence of the achievement gap to a school system that ignores Latino culture or perpetuates struggles in Latino students’ reading by being culturally insensitive. Multiple theorists suggest that school systems that better understand Latino identities will be better at instructing Latino students. Many programs, including Latinos in Action, have been implemented in attempts to close this gap. The Latinos in Action program utilizes Latino adolescents as peer …

Neutro-Connectedness Theory, Algorithms And Applications, Min Xian

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Connectedness plays an important role in human cognitive and learning activities. Human vision system is very sensitive to the connectedness property of objects and effective in "calculating" the property. The study of connectedness will help us explore the way of human brain extracting the global properties of objects, and enable different avenues to design new artificial intelligent (AI) systems with better performances.

However, connectedness is rarely considered in current AI systems because of the lack of complete theoretic system and efficient computation algorithm. In this work, I focus on building the connectedness theory and algorithms in digital space, and apply …

Resolving Spatial And Temporal Variability In Dissolved Organic Matter Characteristics Within Combined Agricultural And Stormwater Conveyances, Bryce A. Mihalevich

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In many urban areas, stormwater runoff can threaten the ecological health of streams and downstream water bodies. Due to the increased impervious nature of urban landscapes, runoff is more “flashy” and as a result, high concentrations of pollutants can be transported in shorter periods of time than in more natural environments. One pollutant of concern is dissolved organic matter (DOM). DOM is important within aquatic ecosystems, but excess amounts can cause depletion in dissolved oxygen concentrations and can negatively affect aquatic organisms. This study investigated changes in DOM quantity and sources within the Northwest Field Canal (NWFC), an urban water …

The “Mississippi Of The West”: Religion, Conservatism, And Racial Politics In Utah, 1960–1978, Jessica Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis examines what historians have written about African Americans in Utah as well as two carefully selected episodes from 1960 to 1978 that illustrate the complexities of race and cultural politics in the state of Utah during this time. Unlike the political and racial discourse in other states, Mormonism and the Church of Jesus Christ of Latter-day Saints became a large part of the dialogue in Utah because of LDS teachings on race and the predominance of Latter-day Saints in the state. The effect of these teachings was not contained to church buildings, but seeped into secular spaces such …

Evaluating Utah 4-H Stem Curricula Used To Promote Stem In Utah 4-H Programs, Michelle D. Simmons

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah 4-H strives to ensure that youth receive the best that positive youth developmental programming has to offer in an endeavor to provide 4-H youth with the knowledge and skills that will given them an advantage in the workforce. The purpose of this study was to determine if Utah's Discover 4-H STEM curricula that is being used to promote STEM in Utah 4-H program met the outcomes of the National 4-H STEM logic model.

Incidental Vocabulary Acquisition In Middle School: An Examination Of Three Instructional Conditions, David B. Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of vocabulary knowledge gained through incidental learning is well documented. The growth of incidental vocabulary knowledge is especially crucial for middle school students due to the complex words encountered in their studies. However, research on incidental vocabulary acquisition for middle school students is lacking. The purpose of this study was to compare the relative effectiveness of three instructional conditions (reading, writing, and reading and writing) on incidental vocabulary acquisition and retention with middle school students in an English as a first language (L1) environment.

In this within subjects repeated measure study, 263 eighth-grade participants received treatment in three …

29-Day Analysis Of Scale Heights And The Inference Of The Topside Ionosphere Over Millstone Hill During The 2002 Incoherent Scatter Radar Campaign, Jennifer L. Meehan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study aims to characterize the topside ionospheric density and temperature profiles using readily available Global Positioning System (GPS) total electron content (TEC) and ionosonde bottomside profile of electron density. The aim of this study is to find a technique that can be applied globally rather than specific locations where a wealth of data exists. Knowledge of the distribution of electron density and its altitude dependence, known as scale height, is important for ionospheric empirical modeling and ionospheric studies, and for practical applications, such as time delay correction of radiowave propagation through the ionosphere.

Over the years, researchers have gathered …

Burning Budgets: Does An Institutional Blank-Check Raise The Severity And Cost Of Fighting Wildland Fires?, Devin T. Stein

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In conducting this research, I wanted to explore whether political incentives have a significant effect on wildfire management in the United States. I attempt to answer this question by proving a theoretical justification for why wildfires may become more expensive to fight and severe to manage because of political institutions. I then attempt to provide some hard evidence to support this theory by using regression analysis. My analysis suggests that political factors do matter for wildfire suppression funding, although I was unable to find strong enough evidence to suggest that these political factors are actually driving more severe wildfires.

This …

A Comparison Of Five Statistical Methods For Predicting Stream Temperature Across Stream Networks, Maike F. Holthuijzen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The health of freshwater aquatic systems, particularly stream networks, is mainly influenced by water temperature, which controls biological processes and influences species distributions and aquatic biodiversity. Thermal regimes of rivers are likely to change in the future, due to climate change and other anthropogenic impacts, and our ability to predict stream temperatures will be critical in understanding distribution shifts of aquatic biota. Spatial statistical network models take into account spatial relationships but have drawbacks, including high computation times and data pre-processing requirements. Machine learning techniques and generalized additive models (GAM) are promising alternatives to the SSN model. Two machine learning …

Understanding The Biology Of Clover Root Curculio And Improving Their Management Using Biofumigation In Alfalfa, Steven J. Price

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Clover root curculio (CRC) is a pest of alfalfa where larvae feed belowground damaging alfalfa roots. Regional knowledge of CRC activity and biology is limited making the development of pest management strategies difficult. One potential management technique for soil-dwelling pests is the use of biofumigant containing cover crops. Biofumigation can affect the survival and behavior of pest insects. However, biofumigant crops have not been evaluated against CRC or as a rotational crop compatible with alfalfa. The goals of this research were to determine 1) phenology, population sizes, and root damage severity of CRC occurring in the Intermountain region and 2) …

Analysis Of The Hite Fault Group, Southeast Utah: Insights Into Fluid Flow Properties In A Reservoir Analog, Daniel J. Curtis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the subsurface faults can act as both barriers and conduits for fluids or gases such as CO₂, hydrocarbons, or water. It is often thought that faults in porous rocks such as sandstone are barriers to fluid flow. In this study we show that this is not always the case. In sandstones like the Cedar Mesa Sandstone it is very important to understand the relationships between this history of fault slip and fluid flow. Better understanding of how fluids migrate through faults and the damaged areas surrounding these faults has strong significance to the oil and gas industry. …

Analysis Of Angles-Only Hybrid Space-Based/Ground-Based Approach For Geosynchronous Orbit Catalog Maintenance, Blythe A. Andrews

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Geosynchronous Equatorial Orbit (GEO) is critical to Earth communications, weather monitoring, and national defense. Orbit estimation of GEO objects is difficult due to physical constraints placed on ground-based tracking devices such as weather, object range, and tracking frequency restrictions. These constraints are commonly mitigated through the use of two-way signaling devices for cooperative GEO satellites. However, determining the position and velocity of uncooperative GEO satellites and/or objects is more challenging. The objective of this dissertation is to quantify the increased orbital accuracy of objects in the GEO catalog when the Air Force Space Command Space Surveillance Network (AFSPC SSN) is …

Natural And Anthropogenic Effects On Life History Characteristics In The Side-Blotched Lizard (Uta Stansburiana), Geoffrey David Stuart Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Survival is a prerequisite for successful reproduction, and is thus intertwined with fitness. Some physiological systems can improve survival, like the immune system, but compete with other processes for resources. Because animals evolved with resource limitation, it is important to understand how these resource-allocation decisions are made. To meet this end, I performed four investigations addressing how life-history characteristics shift in side-blotched lizards (Uta stansburiana) using laboratory studies and multi-year field sampling. First, I measured metabolic rates in response to different immune challenges and different energy states in male lizards. I found that, surprisingly, cutaneous biopsies were associated …

Integrating Black Bear Behavior, Spatial Ecology, And Population Dynamics In A Human-Dominated Landscape: Implications For Management, Jarod D. Raithel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The American black bear (Ursus americanus) has made a robust recovery within the human-dominated, social-ecological systems characterizing the Mid-Atlantic United
States. For example, in northwestern New Jersey (NJ), USA, black bear abundance increased from an estimated 450-500 in 1996 to 3200-3400 in 2010. Bear recovery
coincided with increasing human populations, coupled with shifting settlement patterns toward sprawling suburban communities. Consequently, conflicts have rapidly proliferated over the past three decades and resulted in >1400 incidents of verified property damage, >400 livestock kills, >250 pet attacks and/or kills, seven human attacks and one human fatality since 2001. The New Jersey …

Fundamental Features Of Fostering Teacher Collective Efficacy: Principals’ Attitudes, Behaviors, And Practices, Shelley Nordick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to explore the attitudes, practices, and behaviors of principals who foster teacher collective efficacy. The research questions were developed based upon Bandura’s social cognitive theory to include (a) what are the attitudes held by principals that influence TCE; (b) what are the behaviors enacted by principals that influence TCE; (c) what are the practices employed by principals that influence TCE. The study utilized a qualitative approach with a multisite case study design. The Collective Teacher Efficacy Scale developed by Goddard et al. was used to measure TCE of participating schools. The survey results were …

Effects Of Intentional Electromagnetic Interference On Analog To Digital Converter Measurements Of Sensor Outputs And General Purpose Input Output Pins, David A. Ware

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As technology becomes more prevalent, its application to safety and security in critical systems continues to increase. This leads to an increased dependence on sensors to provide an accurate view of the environment surrounding an application. These sensors can also be exploited by a malicious individual to attack a system and compromise its safety or security. These attacks change the reported value of a sensor so that it doesn't reflect the real situation. The systems in a car can be used as an example of this. Cars can have numerous sensors that measure a variety of things, including the car's …

Siblings Of Adults With Intellectual Disabilities: Their Perspectives On Guardianship And Its Alternatives, Anna M. Brady

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adult siblings of people with intellectual and developmental disabilities (IDD) are often on the front lines of supporting their brothers and sisters with IDD through caregiving and guardianship roles after their parents pass away. However, these siblings are often uninformed or under informed about ways that they can support their brothers and sisters. This study had the following three purposes: to determine what adult siblings of adults with IDD know about guardianship and its alternatives; to explore how adult siblings view guardianship and its alternatives; and to explore what adult siblings think about their role of being a guardian or …

Quantifying Riverbed Sediment Using Recreational-Grade Side Scan Sonar, Daniel Hamill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Colorado River in Glen, Marble, and Grand Canyons is subject to a complex regulatory framework, including the Colorado River Compact, the Endangered Species Act, and the Grand Canyon Protection Act of 1992. Physical, biological, and cultural resources are extensively monitored by the Glen Canyon Dam Adaptive Management Program (GCDAMP) to assess the effect of Glen Canyon Dam (GCD) operations on the downstream environment. The GCDAMP consists of a diverse group of stakeholders who identify priority resources and agree upon water releases at GCD. Large expenditures of money have been devoted to monitoring physical and biological resources in Grand Canyon. …

Bridging Post-Wildfire Communication Gaps Between Managers, Researchers, And Local Communities, Including A Biological Soil Crust Case Study, Hilary Louise Whitcomb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Immediately after a wildfire land managers act quickly to protect water supplies, soil stability, habitat, and forage. We don't currently understand how managers make trade-off decisions between social, political, and ecological factors in these tight timelines or if they are able to use new science. We do know ecosystems often benefit from local engagement, and new, scientifically-grounded methods that improve restoration efforts are needed. As post-wildfire timelines don’t often allow for outside input, I asked managers what they and stakeholders think about post-wildfire projects and what managers think about new science. I asked local citizens what they think about postwildfire …

Seasonal Development Of The Biological Control Agent Of Dalmatian Toadflax, Mecinus Janthiniformis (Curculionidae: Coleoptera), In Utah: Phenology, Overwintering Success, And Mortality, Samantha A. Willden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

By outcompeting desirable vegetation, invasive weeds can dominate field crops and rangelands, drastically reducing yield and land value. One option in controlling the impact and spread of such weeds is reuniting them with their natural insect herbivores, a process called biological control. When successful, biocontrol can be the cheapest way to provide long-term control of invasive weeds, but continual monitoring of insect and weed activity is required to ensure success.

Dalmatian toadflax is an invasive weed that occurs widely throughout the northwestern U.S., and that is spreading south each year to warmer and drier regions, including sites in Utah. Although …

Development And Application Of Hydraulic And Hydrogeologic Models To Better Inform Management Decisions, Trinity L. Stout

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Water is one of the most important and limited resources in regions with little rainfall. As populations continue to grow, so does the need for water. Individuals in water management positions need to be well informed in order to avoid potential negative effects concerning the overall quality and amount of water available for both people and the environment. In order to provide better information for these individuals, computer models and mathematical relationships are commonly developed to estimate the outcome of different situations regarding surface water and groundwater. Along these lines, this study focused on two modeling studies that provide information …

Heat Transfer Analysis Of Localized Heat-Treatment For Grade 91 Steel, Jacob D. Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many of the projects utilizing Grade 91 steel are large in scale, therefore it is necessary to assemble on site. The assembly of the major pieces often requires welding in the assembly; welding drastically changes the superior mechanical properties of Grade 91 steel that it was specifically developed for. Therefore, because of the adverse effects of welding on the mechanical properties of Grade 91, it is necessary to do a localized post weld heat treatment.

In this study a localized post weld heat treatment is used to gather experimental data. The data is then used to derive unknown heat transfer …

The Role Of Utah Farmers In Farm To School Programming, John L. Hawley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This purpose of this study was to describe Utah farmers’ role in farm to school (FTS) programming and their interest in institutional marketing of local foods. The researcher sent a survey to farmers belonging to the Utah Farm Bureau to discover the role they play in FTS in Utah.

Respondents held positive attitudes toward FTS programming and agreed that building relationships with community members and increasing awareness of local food were benefits. They cited a lack of information about schools seeking to purchase local products and restriction of growing seasons as barriers to their participation in FTS. They displayed their …

Estimating Accuracy Of Personal Identifiable Information In Integrated Data Systems, Amani "Mohammad Jum'h" Amin Shatnawi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Both government agencies and private companies rely on the collection of personal data on an ever-increasing scale. Out of necessity, person data include Personal Identifiable Information (PII), which is information that could potentially identify a specific individual. Many of these data would be integrated, so data analyst, policy makers or corporate officers can use it to make decisions or get a conclusion. Integrating data in a heterogeneous database environment create a need to estimate the accuracy of that data; without a valid assessment of accuracy there is a risk of coming with incorrect conclusions or making bad decision based on …