Digital Commons Network^™

Process-Based Management Of Downy Brome In Salt Desert Shrublands: Assessing Pre- And Post- Rehabilitation Soil And Vegetation Attributes, Merilynn Carol Hirsch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As an ecosystem driver, downy brome (Bromus tectorum L.) presents obstacles to land rehabilitation efforts, including restoring desirable species cover. Because damaged ecosystems may have crossed both abiotic and biotic thresholds, ecologically-based control strategies may assist with altering successional trajectories and restoring desirable plant species. My thesis research had three objectives: 1) assess soil and vegetation relationships in degraded salt desert ecosystems prior to implementing downy brome control treatments, 2) determine the effects of control treatments on soil properties and resident plant species, and 3) evaluate the relative importance of shrubland soil type, herbicide type, and herbicide rate on seedling …

Causes, Extent, And Consequences Of Lead-Pellet Ingestion By Chukars (Alectoris Chukar) In Western Utah: Examining Habitat, Search Images, And Toxicology, R. Justin Bingham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Lead ingestion adversely affects humans and over 130 species of wildlife. Wild chukars (Alectoris chukar) are documented to ingest lead, but the causes and consequences of this ingestion are poorly understood. The objectives of this research were to 1) examine the influence of habitat use, the hunting season, and seasonal climate on the extent and severity of lead ingestion by chukars in western Utah, 2) assess the effects of habitat use, feeding behaviors, and lead density on the causes of lead-pellet ingestion in captive and wild chukars, and 3) investigate the consequences of lead-pellet ingestion in captive chukars as a …

Evaluating Reliability And Validity Evidence For Merrill's 2007 5 Star Instrument, Max Hale Cropper

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Merrill’s 2007 5 Star instrument, hereafter called the M-5 Star, is based on Merrill’s well recognized First Principles of Instruction. However, the instrument has not been tested for reliability and validity. In a pilot study, Cropper’s version of his instrument (C-5 Star) showed some reliability and validity evidence, but the M-5 Star needed similar evidence. To address this gap in the literature, the purpose of this study is to assess the reliability and validity evidence for M-5 Star. Raters were drawn from a graduate course in online course evaluation and asked to rate a sample (N = 6) of …

Factors Affecting Greater Sage-Grouse (Centrocercus Urophasianus) Survival And Movement In South-Central Utah, Danny Caudill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Greater sage-grouse are the largest North American grouse species and are dependent on sagebrush for survival. Sage-grouse populations have declined throughout the west. Habitat fragmentation and degradation are likely the main causes of declining populations, and concern has lead to the petitioning for the sage-grouse to be listed under the Endangered Species Act. Survival of adult and juvenile sage-grouse is thought to be limiting population growth. However, survival of juvenile sage-grouse is poorly understood. I aimed to improve the knowledge gap regarding juvenile sage-grouse survival. With improved knowledge of juvenile survival, management actions can be employed to benefit sage-grouse populations. …

Temperature Increase Effects On Sagebrush Ecosystem Forbs: Experimental Evidence And Range Manager Perspectives, Hilary Louise Whitcomb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sagebrush plant communities are among the most threatened in North America. This project had two goals: to test how increased temperature affects native and nonnative forb species common to the Western sagebrush region and to evaluate land manager beliefs about changes in their ecosystems, including those affecting forb species.

Native forbs Sphaeralcea munroana, Crepis acuminata, Linum lewisii, Penstemon palmeri, and Oenothera pallida and non-natives Erodium cicutarium and Lactuca serriola were each subjected to two treatments: experimental warming using open-top chambers and a control. Knowing how forbs used in restoration might respond to future conditions is both …

Microbiological, Thermal Inactivation, And Sensory Characteristics Of Beef Eye-Of-Round Subprimals And Steaks Processed With High-Pressure Needleless Injection, Laura Kahealani Jefferies

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

High-pressure needleless injection (HPNI) is a process where small-diameter, high-velocity burst of liquid, penetrate foods at pressures ≤ 10,000 psi. The potential of HPNI as an enhancing technique for meat was studied. In study 1, HPNI translocated surface E. coli O157 into the interior of beef eye-of-round subprimals with an incidence of 40 (±7), 25 (±8), and 25 (±8)% for meat that had been surface-inoculated with a four-strain cocktail at 0.5, 1, and 2 log₁₀ CFU/cm², respectively. Run-off water contained 2, 2, and 3 log₁₀ CFU/ml and was used for HPNI of additional subprimals, which resulted …

Help In Overweight/Obesity Prevention Effort (Hope) Study – A Study To Identify Resiliency Factors To Childhood Obesity And Comparison Between Body Mass Index And Figure Rating Scales, Rebecka L. Hanson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Obesity results from a complex interaction between diet, physical activity, and the environment. The purposes of this study were to identify behaviors associated with resilience to childhood obesity, and to compare the sensitivity of the Figure Rating Scales (FRS) in reflecting Body Mass Index (BMI).

Fifty health professionals in nutrition and 35 low-income, parent-and-child pairs completed the study. Children aged 6-11, perceived as “normal-weight” by their parents, were recruited. Five children had a measured BMI above the 85^th percentile. Using a picture-sort method, each participant responded to a series of questions about 13 childhood obesity-related messages. Results included comparison …

Making The “Good” Professor: Does Graduate Mentoring Promote Gender Equality In Academia?, Anita Harker Armstrong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mentorship is a critical component of a graduate education and facilitates the process of socialization into the role of professorship. Numerous studies continue to support the idea that mentorship, particularly woman-to-woman mentoring, is essential for overcoming barriers to women’s mobility within male-dominated fields. This study critically examines this assumption through the analysis of 59 qualitative interviews with faculty mentors and graduate students in science, technology, engineering, and mathematics conducted at one Canadian and one American institution. Initially, I explore how mothers in academe are socialized from differing levels to fit into narrowly defined roles as “good” professors. This expands our …

Socioeconomic Status, Women, And Hiv: Do The Determinants Of Female Hiv Vary By Socioeconomic Status In Cameroon?, Joyce Ndueh Mumah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The HIV/AIDS epidemic is currently one of the greatest health challenges being faced by many developing nations, especially countries of Sub-Saharan Africa. It is estimated that more than 25 million Sub-Saharan Africans are infected with the disease, with more than 2.8 million new infected cases in 2006. Mortality from the disease is high, with an estimated 2.1 million having already died from the disease. Women are more likely to be infected with the disease, and account for more than half of all global HIV/AIDS cases. Sub-Saharan African (SSA) women, specifically, constitute about 77 percent of all HIV/AIDS cases in the …

Blueberry Fruit Development And Splitting, Carrie Lee Witcher

Master's Theses

Rain-related splitting of blueberry fruit is a problem facing growers in the southeastern United States and causes an estimated profit loss of up to 20% ($300- $500 per acre). Studies of this phenomenon in other thin-skinned, soft, fleshy fruit showed that no single or set of related physiological or anatomical property explained splitting. Similar research on blueberry fruit was inconclusive, thus a different approach was suggested. l sampled five cultivars at various stages of development distributed across acknowledged split-resistant (SR) and split-susceptible (SS) categories including both rabbiteye and southern highbush types. Several developmental studies were completed at the light microscope …

Collecting, Analyzing And Interpreting Bivariate Data From Leaky Buckets: A Project-Based Learning Unit, Florence Funmilayo Obielodan

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Despite the significance and the emphasis placed on mathematics as a subject and field of study, achieving the right attitude to improve students‟ understanding and performance is still a challenge. Previous studies have shown that the problem cuts across nations around the world, both developing countries and developed alike. Teachers and educators of the subject have responsibilities to continuously develop innovative pedagogical approaches that will enhance students‟ interests and performance. Teaching approaches that emphasize real life applications of the subject have become imperative. It is believed that this will stimulate learners‟ interest in the subject as they will be able …

Press Start & Small Things, Brian Mark Brown

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This thesis project comprises two essay-length memoir pieces exploring the dimensions of fatherhood accompanied by a critical introduction. The essay “Press Start” explores the influence of video games on a young father, tapping his own childhood experiences to illuminate his relationship to the games as well as to his spouse and children. “Small Things” shows his efforts in preparing for the arrival of twins, an event which threatens to disrupt the family dynamic. Touching on issues of protection, separation, and control, the essays work together to comment on the complexities of the father-child relationship from a father’s point of view. …

Alternative Futures For The Upper Colorado River Ecosystem: Phase Ii, Temis G. Taylor

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Wildlife habitat and biodiversity in the Upper Colorado River Ecosystem are threatened by growth of urban areas, subdivision of rural lands, and exploitation of natural resources. The White-Yampa, Colorado Headwaters, and Gunnison River Watersheds within the region were investigated to discover areas supporting high biodiversity that would be possible candidates for conservation efforts by the U.S. Fish and Wildlife Service. Using an alternative futures planning process and principles of landscape ecology, development of energy of the resources in the region was found to be the primary driver for land use and impacts to wildlife habitat. Through application of geospatial modeling …

Mathematical Justification Of Introductory Hypothesis Tests And Development Of Reference Materials, Jennifer L. Loveland

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This purpose of this project was to create a set of reference material for an introductory level statistics course. The focus was on the Neyman-Pearson approach to hypothesis testing. A brief historical development of the Neyman-Pearson approach is followed by mathematical proofs of each of the hypothesis tests covered in the reference material. The reference material includes the basic hypothesis tests taught in an introductory statistics course, the accompanying distributions, and prerequisite information.

Climate Change And Community Dynamics: A Hierarchical Bayesian Model Of Resource-Driven Changes In A Desert Rodent Community, Glenda M. Yenni

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Predicting effects of climate change on species persistence often assumes that those species are responding to abiotic effects alone. However, biotic interactions between community members may affect species’ ability to respond to abiotic changes. Latent Gaussian models of resource availability using precipitation and NDVI and accounting for spatial autocorrelation and rodent group-level uncertainty in the process are developed to detect differences in seasons, groups, and the experimental removal of one group. Precipitation and NDVI have overall positive effects on rodent energy use as expected, but meaningful differences were detected. Differences in the importance of seasonality when the dominant group was …

Controlling Error Rates With Multiple Positively-Dependent Tests, Abdullah Al Masud

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

It is a typical feature of high dimensional data analysis, for example a microarray study, that a researcher allows thousands of statistical tests at a time. All inferences for the tests are determined using the p-values; a smaller p-value than the α-level of the test signifies a statistically significant test. As the number of tests increases, the chance of observing some small p-values is very high even when all null hypotheses are true. Consequently, we make wrong conclusions on the hypotheses. This type of potential problem frequently happens when we test several hypotheses simultaneously, i.e., the multiple testing problem. …

Great Salt Lake Watershed: Its Role In Maintaining The Wetlands Of The Great Salt Lake, Danny C. White Jr.

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The following bioregional planning study is a direct result of the 2009- 2010 studio project initiated by the United States Fish and Wildlife Service (FWS). The FWS contacted the study team and asked them to determine how the future growth and development of the Bear River Watershed would impact the Bear River Migratory Bird Refuge (BRMBR). The study looked at all of the physical and biophysical systems within the Bear River Watershed to identify the issues that had an effect on the BRMBR.

It became apparent from the original project that the future of the BRMBR and other Great Salt …

Religious Space In Transition: A Comparison Of Latter-Day Saint And Nonconformist Worship In Victorian England, Jaclyn Ann Beazer

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

July 19, 1837 was not a day to remember for the majority of the residents of Liverpool, England. For one small group of men, however, this was a day they had been anticipating for months. After a record breaking Atlantic crossing, the men hired a small boat to take them ashore rather than wait for the passenger steamer. Just before the boat reached the pier, several of the men jumped out and waded to shore, anxious to reach land and begin their work. These men were the first missionaries from the Church of Jesus Christ of Latter-day Saints to arrive …

The Role Of Pragmatic Competence In Second Language Acquisition, Leah J. Reigle

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This portfolio is the culmination of the author’s years spent observing and studying language in the pursuit of a Master’s degree in Second Language Teaching at Utah State University. Included here is the author’s personal teaching philosophy on effective language instruction, written with a college-level EFL classroom in mind. In addition, and relating to this teaching philosophy, are three additional artifacts addressing the significance of pragmatics in second language acquisition. These artifacts demonstrate the author’s understanding of the roles of culture, language, and literacy in a second language classroom. An annotated bibliography supporting the author’s perspective and philosophy on language …

Assessing Phosphorus-Transport From Biosolids Land Application Sites In Utah, Mohan K. Kumar

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Phosphorus Site Index (PSI) is a phosphorus transport assessment tool used to estimate the risk of P transport from soils. Various components, such as soil erosion, P fertilizer application rate, plant available P in soil, etc. that have an influence on P transport from a site, are weighted and given ratings, and a combination of these components are expressed as PSI. This study has considered two biosolids land application sites in Utah, which received biosolids amendments over time, to develop a specialized PSI for the state of Utah.

Phosphorus from land application of biosolids has been considered a potential risk …

Simple And Appropriate Methods For Household Water Treatment, Morris Elya Demitry

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Shortage of drinking water is the big challenge for Sudan. The cost of water treatment is the main reason for using untreated water for drinking purposes in many urban areas in Sudan. Water born‐diseases (diarrhea, typhoid, etc) are common and there are many victims in unimproved urban areas in Khartoum (Sudan) due to poor or the lack of treatment of drinking water.

In this work, a simple and appropriate method (sand filter) for household water treatment was tested and developed. The main objective of using this method is to help people in urban areas without access to treated water to …

Historic Channel Change And Post-Project Analysis Of A Habitat Restoration Project On The Upper Strawberry River, Utah, Marshall Bruce Baillie

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Restoration of the upper Strawberry River included bank stabilization techniques because it was assumed that excessive bank erosion was degrading spawning habitat for Bonneville cutthroat trout (Oncorhynchus clarki Utah)(BCT). Using a long-term aerial photograph record, we determined the historic range of variability in bank erosion rates and channel geometry, and used this information to assess present-day conditions and the rationale for restoration. Relative to historic variability, bank erosion rates were low and channel morphology was stable in the decade prior to restoration. Although a historic loss of riparian vegetation coincided with a shift to a wider and more …

Carbon Nanotube Growth Via Spray Pyrolysis, Robert Welch Call

Undergraduate Honors Capstone Projects

Spray pyrolysis is a promising method to create carbon nanotube forests (CNFs) on various surfaces. By injecting metallocene-hydrocarbon solutions into a heated quartz reactor, catalyst particles and carbon nanotubes can be formed simultaneously. Factors that affect CNF growth include the precursor concentration, injection rate and duration, carrier gas flow rate, substrate surface, growth temperature, and the composition of gases inside the reactor. The CNF morphologies affected by these factors will be presented and, hopefully, an optimum condition will be found.

Queering Gender: How Transgender College Student Navigate Gender, Rachel Jaggi

Undergraduate Honors Capstone Projects

In response to the “Doing Gender” theory as proposed by West and Zimmerman, some scholars have argued that the theory perpetuates gender inequality and leaves no room for social change. These scholars argue that research needs to be directed towards deconstructing the gender system, thereby “undoing gender.” Transgender individuals, who appear to be playing with the system of gender, provide an important conduit through which to examine the possibility of transcending the gender binary. I conducted semi-structured interviews and focus groups with transgender college students to examine the extent to which these individuals are able to overcome the dichotomous gender …

Combating Antibiotic Resistance Through Development Of A Novel Antimicrobial Delivery Vehicle, Alex Hatch

Undergraduate Honors Capstone Projects

A thermoreversible gel for antimicrobial agent delivery would provide a novel platform suitable for medical applications from persistent infections arising from localized biofilms. Thermoreversible gels could be used to coat medical implants, to inject for subdermal treatments, or to implement in topical applications. FDA approved Pluronics® form thermoreversible gels and certain Pluronics® display inherent varying degrees of antimicrobial activity. Pluronics® have been shown to affect efflux pumps, and reduce ATP levels within the bacterial cell. In combination with antibiotics and other pharmaceuticals, Pluronics® have been used to sequester drugs and act as a delivery vehicle. With advances in nanomedicine, nanoparticles …

The High Cost Of Cheap Coal; Why Can't We Move To Renewable Energy, Cameron Dale Bartlett

Undergraduate Honors Capstone Projects

This article addresses the historic and current use of coal as the main source of electric power throughout the United States. Coal powered power plants remain an important part of the history and industrialization of the United States, even though there are many detrimental health and environmental impacts associated with its use. A slowly growing trend has been emerging with research on and use of renewable energy to replace fossil fuels, such as coal. Greater public awareness and involvement will help drive the slowly emerging use of renewable energy. This article looks at the current barriers that are prohibiting the …

Ultrasound As An Aversive Stimulus For Use With Rats: A Novel Model Of Aversive Control, Brandon Norlund

Undergraduate Honors Capstone Projects

Negative reinforcers serve to maintain or increase behavior through the removal of an aversive stimulus. The primary method of studying negative reinforcement in non-humans has been through the use of electrical shock. While this method has proven to be reliable, many negative reinforcers that humans and non-humans encounter do not elicit tactile pain. Therefore, the purpose of this study was to explore a novel, non-human animal model of aversive control without the use of electrical shock as the negative reinforcer. A considerable amount of research has shown that various strains of rats find ultrasonic tones of certain frequencies and amplitudes …

Alternative Futures For The Upper Colorado River Ecosystem: Phase Two, Temis G. Taylor

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The United States Environmental Protection Agency (2001) reports that habitat destruction is the main factor responsible for species endangerment. Trends in land use and expansion of urban areas into adjacent open space will continue to consume land and fragment or destroy habitat (U.S. Environmental Protection Agency , 2001). Studies have shown that habitat loss negatively impacts overall species abundance and reduces biodiversity (Andren, 1997; Fischer & Lindenmayer, 2007; Hansen et al., 2005; McKinney, 2002; Pimm & Raven, 2000; Sole, Alonso, & Saldafia, 2004, and others). Habitat destruction and fragmentation are believed to be core causes for biodiversity decline, although species' …

The Effect Of Stream Restoration On Preferred Cutthroat Trout Habitat In The Strawberry River, Utah, Nicolas R. Braithwaite

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Stream restoration has become a popular management tool for attempting to increase and/or restore fish populations by improving habitat. A section of the Strawberry River, Utah recently underwent a stream restoration project, where the main goals of the project included increasing spawning activity, rearing potential, and resident populations of Bear Lake cutthroat trout Oncorhynchus clarkia utah. The impact of the restoration project on cutthroat trout was investigated by first characterizing preferred habitat for different life stages, investigating habitat as a limiting factor in the system, and then assessing the quality of available habitat by comparing restored/unrestored sections of stream …

Invertebrate Community Changes Along Coqui Invasion Fronts In Hawaii, Ryan T. Choi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Puerto Rican coqui frog, Eleutherodactylus coqui, was introduced to Hawaii in the late 1980s via the commercial horticulture trade. Previous research has shown that coquis can change invertebrate communities, but these studies were conducted at small scales using controlled, manipulative experiments. The objective of this research was to determine whether coqui invasions change invertebrate communities at the landscape scale across the island of Hawaii. At each invasion front, we measured environmental variability on either side of the front and removed sites that were too variable across the front to ensure that the impacts we measured were the result …