Digital Commons Network^™

Severed Hands As Symbols Of Humanity In Legend And Popular Narratives, Scott White

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Modern scholarly theories of oral folk narrative suggest that urban legends contain expressions of cultural beliefs that can be understood both through the contexts in which these stories are told and through the elements of the stories that remain constant across multiple tellings by various narrators. This study centers exclusively on stories and popular culture products that utilize missing or damaged fingers, hands, or arms, in order to identify the cultural values that are attached to hands in American culture. These stories in particular were chosen because the severed hand was perceived at the onset to be a common element …

A Survey Of Utah's Public Secondary Education Science Teachers To Determine Their Feelings Of Preparedness To Teach Engineering Design, Roland Tyler Ames

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Education is always changing and science education is no exception, with many influential publications passing through science education over the years. The latest wave in science standards is called the Next Generation Science Standards. The Next Generation Science Standards are anticipated to have a significant effect on state science standards around the entire country. One thing about these new standards is very different from all previous science standards—they include the principle of engineering design in them.

Asking science teachers to teach engineering design is asking them to teach a principle for which their teaching licensure would not have formally prepared …

The Triad Trial: Online Education For Coaches On The Prevention Of The Female Athlete Triad, Megan Jane Ostler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

High school coaches play a huge role in establishing a healthy environment for their athletes and often students. The coach‐athlete relationship has proven to be a strong and useful bond in prevention of adverse behaviors of athletes or in prevention of health problems such as concussions. The female athlete triad (triad) is a common health problem among female athletes. Many high school coaches are unaware of the triad or the serious health and performance consequences for their athletes. The triad is a syndrome marked by 3 interrelated adverse effects: decreased energy availability, menstrual dysfunction, and decreased bone mineral density.

The …

Nitrogen Cycling In The Rhizosphere Of Cheatgrass And Crested Wheatgrass: Contributions Of Root Exudates And Senescence, Kendalynn A. Morris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cheatgrass is an invasive weed that has come to dominate large areas of the western United States. Once an ecosystem has been converted to a cheatgrass monoculture, it is extremely difficult to restore native vegetation. Cheatgrass negatively impacts wildlife and increases wildfire frequency and intensity. Understanding how cheatgrass so effectively invades western ecosystems is essential to turning the tide of invasion. One possible key to cheatgrass’ success is alteration of soil nutrient cycling. The goal of this study is to explore how nitrogen (N) may accumulate in cheatgrass soils via redistribution of N within soil N pools. To accomplish this …

Cyber-Physical Systems Enabled By Unmanned Aerial System-Based Personal Remote Sensing: Data Mission Quality-Centric Design Architectures, Calvin Coopmans

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the coming 20 years, unmanned aerial data collection will be of great importance to many sectors of civilian life. Of these systems, Personal Remote Sensing (PRS) Small Unmanned Aerial Systems (sUASs), or “data drones,” will need special attention due to their low cost and high value for farming, scientific, and search-and-rescue uses, among countless others. Cyber-physical systems (large-scale, pervasive automated systems that tightly couple sensing and actuation through technology and the environment) can use sUASs as sensors and actuators, leading to even greater possibilities for benefit from sUASs. However, this nascent robotic technology of small unmanned aerial systems (sUASs) …

The Optimal Cow Size For Intermountain Cow-Calf Operations: The Impact Of Public Grazing Fees On The Optimal Cow Size, Jesse Russell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The cattle industry is very competitive which is forcing cow-calf producers to strive for efficiency. Research has shown that as a cows mature weight increases, feed efficiency decreases, as well as reproductive efficiency and other production factors. The purpose of this paper is to (1) identify the economically optimum cow size when charging for grazing public lands on a true Animal Unit Equivalent (AUE) basis and (2) determine if the current practice of charging on a per head basis for grazing public lands has an effect on the optimal cow size.

To simplify the complexity of this problem, three different …

Investigations Of Cho 1-15 And Silk Gland Cell Line Development, Susan Kathleen Robinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The BioProcessing Demonstration and Training Laboratory was established with a collaboration between Utah State University and Thermo Fisher-Scientific, Inc. This lab was developed into a fully functioning tissue culture facility. Demonstration of tissue culture procedures were necessary for the lab to be industry-fully qualified. The CHO 1-15 cell line protocols were optimized by establishing conditions for reproducibility in shaker flasks and bioreactors (2 to 250 L capacity). CHO 1-15 is the cell line of choice for protein production in the bio-manufacturing industry. Oxidative stress is a problem in the industry because it can cause a decrease in protein production. Mesobiliverdin …

Macroinvertebrate-Driven Nutrient Recycling In Four Large Rivers, Matt A. Schroer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The cycling of nutrients is a fundamental process in streams and rivers, and scientists are increasingly recognizing the importance of animal communities to nutrient dynamics in these ecosystems. Despite growing evidence that animal excretion (i.e. urine) can supply limiting nutrients to primary producers in small streams, the importance of excretion is uncertain in large rivers. Accordingly, I used three estimation approaches based on past and new excretion rate data to determine nitrogen (N) and phosphorus (P) excretion inputs from insect communities in four large rivers (discharge > 10 cubic meters per second) in North America, and I compared these rates to …

Are Experimentally Derived Estimates Of Thermal Tolerance Useful In Interpreting Species Distribution Models, Iva Sokolovska

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Species distribution models are frequently used in ecology to predict the spatial and temporal occurrence of organisms. Direct interpretation of these models assumes that the relationships between the organisms and their environment are manifestations of causal mechanisms. However, in general, the mechanisms producing these associations have not been experimentally validated, which questions our confidence in their interpretation and application. Temperature is one of the most important factors influencing the fitness and distribution of aquatic organisms, and studying the thermal physiology of aquatic invertebrates could provide a useful approach for validating predictions of the species distribution models.

Experimental thermal tolerance studies, …

The Ecosystem Role Of Fishes In Lotic Environments, Christopher C. Wheeler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is important for humans to understand how ecosystems work because we depend on them for a variety of products and services. For example, rivers and streams provide fisheries, improved water quality, and recreational opportunities to many individuals. In rivers, interactions among fishes, other stream plants and animals, and the physical river environment can influence continued provision of these valuable services. However, the role played by many freshwater fishes in the provision of these services remains unknown. Additionally, it is important to identify different factors that affect the outcome of interactions involving riverine fishes. To address these issues, I evaluated …

Adolescent Self-Described Volume Of Texting: Discovering Relationships With Psychosocial Development And Interpersonal Relationships, Tessa Cutler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Researchers explored the relationship among adolescent self-reported amounts of texting and self-esteem, self-construal, autonomy, and attachment. Data were collected from a high school in an urban area in the Mountain West. Participants included 180 students (53% female). Participants were asked to self-describe their volume of texting as high, medium, or low. Participants were also asked to complete the following scales: Rosenberg Self-Esteem Scale, the Self-Construal Scale, the Case Inventory, The Adolescent Autonomy Questionnaire, and The Modified Inventory of Parent and Peer Attachment.

It is suggested that text messaging is more strongly related to self-esteem when texting is placed as the …

Barriers To Curricular Change In General Education Mathematics At A Large Public Institution, Marcus Jorgensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This qualitative study looked for barriers to curricular change in general education mathematics at a large public university (LPU) in the Western United States. The literature showed that a number of national organizations dealing in math education have recommended alternatives to the traditional algebra-intensive curriculum. LPU still relies predominantly on traditional College Algebra as its quantitative literacy (QL) course. With such an algebra-heavy emphasis, students may be missing more relevant and useful mathematics. In addition, the College Algebra course has a low success rate, which becomes a barrier to student retention and graduation. Interviews were conducted with 14 participants who …

Estimating Baseline Population Parameters Of Urban And Wildland Black Bear Populations Using A Dna-Based Capture-Mark-Recapture Approach In Mono County, California, Jonathan L. Fusaro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Prior to European settlement, black bear (Ursus americanus) were far less abundant in the state of California. Estimates from statewide harvest data indicate the California black bear population has tripled in the last 3 decades. Bears inhabit areas they formally never occurred (e.g., urban environments) and populations that were at historically low densities are now at high densities. Though harvest data are useful and widely used as an index for black bear population size and population demographics statewide, it lacks the ability to produce precise estimates of abundance and density at local scales or account for the numerous …

Activated Carbon Decreases Invasive Plant Growth By Mediating Plant-Microbe Interactions, Nicole E. Nolan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To restore lands invaded by dense, non-native vegetation, it may be necessary to develop targeted restoration tools than can remove the mechanism used by these non-native species as a competitive advantage. Activated carbon (AC) is one such tool, with the ability to disrupt the mechanisms of plant to plant communication (allelopathy) and positive plant to microbe communication commonly used by non-native species. Previous studies have shown the success of high concentrations, 1000g/m², of AC in native plant community restoration on a small scale. Here, our goals are twofold: first, to test AC effectiveness in restoring desirable plant communities …

System Identification Of A Small Low-Cost Unmanned Aerial Vehicle Using Flight Data From Low-Cost Sensors, Nathan V. Hoffer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Remote sensing has usually been done with satellites and manned aircraft. While they can be useful, satellites and manned aircraft have issues in how quickly you can get data, process it, and go back to get more data. Small low-cost unmanned aerial vehicles (UAVs) overcome these issues. To collect precise data a precise model of the UAV is needed to develop the autopilot, make sure the aircraft flies well, and does not break. One method of making a model is system identification (system ID). In this thesis system ID of a small low-cost fixed-wing T-tail UAV is done. The equations …

Restoring The Lost Fishery: An Environmental History Of Northern Nevada's Pyramid Lake And Lower Truckee River Fishery, David Bolingbroke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis focuses on fisheries managers’ efforts to restore native cutthroats to northern Nevada’s Pyramid Lake for recreation, and the Paiutes’ battle to preserve them as a means of livelihood. Their efforts to reconstruct the fishery revealed the implausibility of environmental restoration, but more importantly underlined the motivations necessary to attempt it.

Chapter 2 describes how the Pyramid Lake Lahontan cutthroat— historically an important subsistence resource for Northern Paiutes— were initially exploited for profit in the late 1800s and early 1900s, and gradually destroyed as agricultural interests diverted the Truckee River’s water and industrial pollution contaminated the trout’s aquatic habitat. …

Foraging Ecology Of Cougars In The Pryor Mountains Of Wyoming And Montana, Linsey Blake

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

We conducted this study to better understand the impact of cougar (Puma concolor) predation in the Pryor Mountains of Wyoming and Montana. Managers of the Bighorn Canyon National Recreation Area and the Pryor Mountain Wild Horse Range were concerned that cougars were having a negative impact upon a small, isolated Rocky Mountain bighorn sheep (Ovis canadensis canadensis) population and were hoping predation might be limiting a feral horse population (Equus caballus) that was in excess of the Appropriate Management Level set by the Bureau of Land Management. Wildlife tourism brings revenue to the park …

The Role Of Masculinity, Masculine Capital, And Spousal Social Control On Men's Health Behaviors, Melinda Gean Arnell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Previous research has noted that married men tend to be healthier than single men. And that wives may exert influence on men’s health behaviors, both positively and negatively, through social control methods. However, little research has examined how men maintain masculine status when faced with spousal social control efforts. The purpose of this study was twofold. First, the study sought to gain a greater understanding of how wives exert social control over spousal health behaviors. Second, the study sought to examine how men maintain masculinity, specifically masculine capital, when their wives desire to change the health behaviors of their husband’s. …

Influence Of Stand Composition On Soil Organic Carbon Stabilization And Biochemistry In Aspen And Conifer Forests Of Utah, Mercedes Román Dobarco

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Social concern about climate change and the elevated level of atmospheric CO2 demands understanding carbon (C) storage and dynamics in forest soils, especially since soils are the largest C reservoir in terrestrial ecosystems, storing two thirds of total C. Quacking aspen (Populus tremuloides Michx.) is an iconic species in western United States that offers multiple ecosystem services, such as habitat and forage for wildlife and cattle, biodiversity, water yield, and C storage. A decline in quaking aspen cover has been documented during the last decades, possibly due to fire suppression and ungulate browsing. A shift from aspen- to conifer-dominated …

Biogeochemistry Of Selenium In Pariette Wetlands, Utah, Colleen P. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Pariette Wetlands was constructed to provide wildlife habitat in an arid environment. Elevated levels of selenium (Se) have been detected in water, soil, and biota. Selenium concentrations have ranged from below detection limit to four times the water quality criterium limit. Here we report on three interrelated research topics: 1) selenium mass balance and flux in water, 2) selenium accumulation, concentration and volatilization of water and plant tissues; and 3) selenium sorption by upland and wetlands soils.

1) Mass balance and mass water flux of selenium for the Pariette Wetlands were studied. A comparison of inlet and outlet …

The Agricultural Economics Of Fremont Irrigation: A Case Study From South-Central Utah, Chimalis R. Kuehn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Recent identification of a Fremont irrigation feature in southern Utah provides an example from which to study costs and benefits of intensive agricultural investment by the Fremont. Studying irrigation investment informs our understanding of cultural process behind subsistence decisions, as well as of cultural complexity among the temporally and geographically diverse Fremont farmers.

Fieldwork, funded in part by Undergraduate Research and Creative Opportunities (URCO) Grants, included experimental canal digging with wooden stick tools and excavation of a subsurface canal feature. This study uses prehistoric canal dimensions and labor rate data to compare relative efficiencies of irrigated and dry-farmed maize. Analysis …

Advancing Digital Soil Mapping And Assessment In Arid Landscapes, Colby W. Brungard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Soil information is required for arid and semi-arid land management decisions such as permitting livestock grazing or planning vegetation restoration projects. However, traditional soil mapping methods may not provide adequate soil information, because the scale of mapping often requires dissimilar soils to be grouped together and there are no estimates of map uncertainty. Traditional methods are also often too costly or impractical to implement in large, remote, public arid and semi-arid rangelands. Digital soil mapping (DSM) may be able to overcome these limitations. Digital soil mapping is the creation of pixel-based soil maps using quantitative statistical models that relate easily …

Nutrition And Genes Associated With Orofacial Cleft Birth Defects In Utah, Huong Dieu Meeks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Orofacial clefts (OFCs) are facial malformations that happen during early pregnancy and have a complex and heterogeneous etiology, involving both genetic and environmental risk factors. This project examined the association between maternal nutrition, folate-related biomarkers, candidate genes involved in one-carbon metabolism (OCM), and OFCs in order to achieve more comprehensive knowledge of how nutrition and genetics influence OFC risk. All studies performed in this project used the data collected in the Utah Child and Family Health Study (UCFHS) and the Johns Hopkins International Cleft Consortium.

Neither maternal periconceptional multivitamin use nor healthy dietary pattern score alone was individually associated with …

Understanding Local Perceptions And The Role Of Historical Context In Ecotourism Development: A Case Study Of St. Kitts, Amber Greening

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ecotourism is a popular tool for the conservation of fragile ecosystems and local development of the communities surrounding them. It is widely argued that the key to effective and sustainable ecotourism programs relies on the depth of community involvement and support. This research reveals a better understanding of community members’ perceptions of ecotourism and conservation, and how these perceptions potentially influence participation in current and future ecotourism projects within the villages of Cayon and Keys on the Caribbean island of St. Kitts. Data were collected through several qualitative methods including: face-to-face surveys with Cayon and Keys villagers; interviews with government …

Stem Development, Seeding Rate, And Establishment Of Birdsfoot Trefoil (Lotus Corniculatus) For Organic, Grazing-Based Dairies, Sara Hunt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Birdsfoot trefoil (BFT, Lotus corniculatus L.) is a non-bloating, productive forage legume well suited to grazing-based ruminant production. This thesis presents three studies conducted in the Mountain West applicable to organic management and cultivation of BFT. The first is an analysis of lignification in BFT stems that supports recommendations to harvest BFT at approximately 6 weeks of regrowth, or early bloom. Lignification decreases digestibility and is correlated with high shear force required for grazing animals to break BFT stems. The process of stem lignification was observed by harvesting increasingly mature stems; cutting thin sections of the sixth stem internode, which …

Habitat Characteristics Of Mexican Spotted Owls (Strix Occidentalis Lucida) In The Canyonlands Of Southern Utah, Leah R. Lewis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mexican Spotted Owls are considered a threatened species by the US Fish and Wildlife Service. Therefore, they must be properly managed and protected by federal and state agencies. In this study I explored the habitat characteristics used by Mexican Spotted Owls in the canyonlands region of southern Utah. I spent three summer field seasons (May-September) from 2010 – 2013 locating Mexican Spotted Owl sites and measuring vegetative and geologic features at these sites. I found that canyon width and very tall vegetation influenced Mexican Spotted Owl presence, suggesting that these owls prefer narrow canyons that are vegetated with trees.

Based …

Mothers On The Market: Employer Hiring Practices And Motherhood Penalties, Elizabeth Kiester

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

While gender inequity in wages is often discussed in the media by politicians, the motherhood wage penalty receives substantially less attention. This distinct wage penalty suggests that women with children suffer a wage penalty separate from women without children. In addition, there is an employment gap between mothers and nonmothers indicating that mothers are less likely to be employed. While some argue that this is a matter of choice, I contend that mothers may face unique barriers that deny them access to the labor market. I tested this theory in two ways and in two states; Utah and California. First, …

Molecular Systematics, Historical Biogeography, And Evolution Of Spider Wasps (Hymenoptera: Pompilidae), Juanita Rodriguez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the diversity and classification of any group of organisms provides a foundation for further scientific studies in ecology, evolution, and conservation. Insects are among the most diverse organisms that inhabit the planet, but knowledge of their diversity and classification is still limited. One understudied group of insects is spider wasps. These are solitary parasitoids that use one spider to lay a single egg. There are approximately 5,000 described species, and many more to be described. Unfortunately, fewer than 10 scientists worldwide study these insects. One reason the group has not been very well studied is the difficulty …

Exploring The Lived Experiences Of Couples Making The Transition To Parenthood And The Meaning They Ascribe To Brief, Couple-Focused, Preventative Interventions, Dolores D. Michael

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this research study was to investigate how meaningful it would be to provide relationship therapy from a marriage and family therapist to couples going through the transition to parenthood. The participants in this study all received four therapy sessions before the baby was born and one therapy session after the birth. A total of five couples participated in this study. Data was gathered from the assessments they took before each therapy session and at the final interview.

As a result, the participants in this study all remained stable or increased in their marital satisfaction when measured four …

An Adolescent Journey: Expressive Letter Writing Through A Wilderness Adventure Therapy Program, Ava M. Crump

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This qualitative phenomenological study explored the key themes of an adolescent journey during a wilderness adventure therapy program through expressive letter writing to their parents. Ten complete sets of letters (five boys and five girls) totaling over 400 pages were analyzed by four independent coders until saturation of themes were reached. There were five overarching themes that emerged from the data: impact of wilderness experiences, desires for improved relationships, apology and accountability, negative emotions, and positive growth and coping. These themes were presented in the chronological pattern that they appeared in the letters. The findings represent the adolescents’ experiences written …