Digital Commons Network^™

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 …

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 …

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 …

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 …

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 …

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 …

Biopsychosocial Variables Predict Compensation And Medical Costs Of Radiofrequency Neurotomy In Utah Workers' Compensation Patients, Amie L. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Back pain is one of the most expensive medical conditions to treat. There has been a great deal of research showing that back pain surgery is expensive, but less is known about the costs of less-invasive spine procedures such as radiofrequency neurotomy. Radiofrequency neurotomy is used to treat facet joint pain and typically offers temporary pain relief by coagulating the affected nerve with radiofrequency waves to block pain messages from reaching the brain. This study aimed to document the costs of radiofrequency neurotomy in a group of participants who received the procedure through the Workers’ Compensation Fund of Utah (WCFU). …

Optimization Of Wastewater Microalgae Pretreatment For Acetone, Butanol, And Ethanol Fermentation, Yessica A. Castro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Acetone-butanol-ethanol (ABE) fermentation from wastewater microalgae by Clostridium saccharoperbutylacetonicum N1-4 is a novel bioprocess that utilizes waste substrate to generate valuable solvents. Butanol, the most abundant product resulting from ABE fermentation, is an environmentally safe and high performing fuel that can be utilized as a drop-in-fuel; however, high operational costs and low ABE yield present challenge in scale-up of the process. The utilization of algae as a substrate requires pretreatment prior to fermentation to increase the bioavailability of the algal fermentable sugars and to improve the conditions of the pre-fermentation medium. The purpose of this thesis was to optimize wastewater …

Sustainable Production Of Novel Biomaterials In Escherichia Coli, Asif Rahman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The biotechnology revenues in the United States exceeded $100 billion in 2010 and the potential impact of synthetic biological engineering has been identified nationally as an emerging technology to further expand the national bioeconomy. Synthetic biological engineering approaches biology from an engineering perspective to make biology easier to engineer. The potential to engineer microorganisms for novel applications can have far-reaching implications and benefits for society. Some of the potential applications range from biosensors, biofuels, therapeutics, and biomaterials.

In this study two biomaterials were produced in genetically engineered Escherichia coli: polyhydroxybutyrates (PHBs) and spider silk. PHBs are bioplastics that have …

Use Of A Net Rate Of Energy Intake Model To Examine Differences In Juvenile Steelhead (Oncorhynchus Mykiss) Densities And The Energetic Implications Of Restoration, C. Eric Wall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Bonneville Power Administration (BPA) Fish and Wildlife Program mitigates for impacts of hydroelectric dams on ESA-listed salmon and steelhead populations in the Columbia River Basin (CRB). Considering the sizable investments in mitigation and the diversity of stream habitats within the CRB, there has been a pointed effort to develop and identify meaningful metrics relating to fish populations and trends in their habitat across the CRB. The Integrated Status and Effectiveness Monitoring Program (ISEMP) was developed in 2003 specifically for this purpose, and is tasked with developing and testing strategies for determining the status and trend of salmonid populations and …

Alkaloid Production By Hairy Root Cultures, Bo Zhao

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the present research, nicotine alkaloid production by Nicotiana tabacum (tobacco) hairy roots and tropane alkaloid production by Hyoscyamus niger hairy roots were investigated. The first objective of this research was to improve the oxygen mass transfer in hairy root cultures with microbubbles. Oxygen was shown as a critical nutrient for the growth of tobacco and H. niger hairy roots. In a 1-liter fermentor, microbubble dispersion improved the oxygen mass transfer, tobacco hairy root growth, and nicotine production in the medium. In a novel ground-joint column bioreactor, microbubbles enhanced the oxygen mass transfer and the growth of H. niger hairy …

Information And Hardness Quantification Of Graphs: A Computational Study, Brent Dutson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

New techniques to measure the information contained within a network of interconnected nodes (such as links between computers in the Internet) have recently been developed. This work studies the relationship between the computer time needed to solve a common network problem and the information contained within the given network.

Impact Of Organic Matter Composition From Urban Streams And Storm Water On Oxygen Consumption In The Jordan River, Jacob Matt Richardson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The water quality of the Jordan River has been the subject of a Total Maximum Daily Load study conducted under the direction of the Utah Department of Environmental Quality's Water Quality Division (DWQ). They have determined the oxygen impairment issues in the river are most likely tied to the amount of organic material entering the river from various sources.

The focus of the study conducted by Jacob Richardson was organic material that enters the Salt Lake City storm drain system, and is eventually released into the Jordan River. He found that leaves, grass, and wood particles that enter the storm …

Specific Learning Disabilities: Beliefs About The Construct, Identification Methods, And Job Satisfaction Among Practicing School Psychologists, Joseph M. Cottrell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Students with specific learning disabilities (SLDs) account for approximately 40% of all students receiving special education services. Debate among professionals regarding the causes of SLDs and the most appropriate methods used to identify SLDs persists. This debate may be related to the increase in prevalence of SLDs since the implementation of special education law in 1975. There are three prominent theories regarding the cause of SLDs: (a) environmental theory, (b) biological theory, and (c) interactional theory. The Individuals with Disabilities Education Act (IDEA) allows school districts to implement the following SLD identification procedures: (a) the IQ-Achievement discrepancy method, (b) response-to-intervention …

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, …

The Academic Preparation And Background Of Public Secondary Mathematics Teachers In Utah 1966-1967, Charles Martin Crittenden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A random survey was conducted to determine the academic preparation and background of the public secondary mathematics teachers in the state of Utah.

The survey indicated that there is a wide variance in the teacher mathematics preparation between the three types of public secondary schools. The class B high schools have a smaller percentage of well prepared mathematics teachers than either the class A high schools or the junior high schools.

The following facts were discovered: (1) 22.03 percent of all the surveyed mathematics teachers had between 1 and 15 quarter hours of college mathematics preparation, (2) 5.22 percent had …

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 …

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 …

Pathway Pioneer: A Web-Based Graphical Tool For The Organization And Flux Analysis Of Metabolic Networks, Sumit Kumar Singh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Every so often the field of genome-scale metabolic networks undergoes radical changes, each bringing its own complexity and challenges. The existing visualization tools, owing to their inability to assist in generating layouts suitable for easy readability and conceptualization, hinder further advancement. The lack of in-depth comprehensible representation of the intricacies of interaction and arrangements within the network topology prevents researchers from being able to advance at a faster speed despite the growing number of networks and systems. The far and wide diverse standards, layout schemas and network formats of the biological realm contribute to the existing challenges of developing visualization …

Father-Child Play Behaviors And Child Emotion Regulation, Amanda Hagman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Most of us have learned ways to manage how, when, and to what extent we experience emotions. These emotion regulation skills are habitual and may seem innate, but for infants and young children these abilities are basic, limited, and unrefined. Developing emotion regulation skills is an important learning task for infants and toddlers; the role of fathers in emotion regulation learning is a growing area of research. This research takes a closer look at early childhood and how father-child interactions may contribute to child emotion regulation.

Theory suggests that during interactions with their parents, children learn emotion regulation skills, but …

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 …

The Role Of Vegetation Structure, Composition, And Nutrition In Greater Sage-Grouse Ecology In Northwestern Utah, Brian R. Wing

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The greater sage-grouse (Centrocercus urophasianus; sage-grouse) is the largest grouse species in North America and an indicator species for the condition of sagebrush (Artemisia spp.) ecosystems. The Box Elder Sage-Grouse Management Area (SGMA) in northwestern Utah encompasses one of the state’s largest sage-grouse populations.

To fill knowledge gaps regarding the population inhabiting the Raft River subunit of the Box Elder SGMA, I captured, radio-marked, and monitored 123 (68 female, 55 male) sage-grouse from January 2012 through December 2013. My purpose was to describe how the seasonal movements, survival, and reproductive rates of this sage-grouse population …

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 …

Trophic Status, Energetic Demands, And Factors Affecting Lahontan Cutthroat Trout Distribution In Pyramid Lake, Nevada, Nicholas A. Heredia

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The progression of human development across the landscape has caused declines to both terrestrial and aquatic fauna. Many fishes, specifically native salmonids, have seen reductions in both population size and geographic distribution resulting from reduced habitat, overharvest, and the introduction of non-native predators and competitors. A native North American fish particularly hard hit by these types of actions, Lahontan cutthroat trout, are now limited to less than 10% of their historical habitat, and currently occupy only half of the lakes that they once occupied.

In Pyramid Lake, Nevada, where Lahontan cutthroat trout were once locally extinct, due to overfishing, water …