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Greater Sage-Grouse Response To Sagebrush Reduction Treatments In Rich County, Utah, Roger Blair Stringham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Management of greater sage-grouse (Centrocercus urophasianus) in the west has changed over the last several decades in response to environmental and anthropogenic causes. Many land and wildlife management agencies have begun manipulating sagebrush with herbicides, machinery, and fire. The intent of these manipulations (treatments) is to reduce sagebrush canopy cover and increase the density of grass and forb species, thus providing higher quality sage-grouse brood-rearing habitat. However, monitoring of sage-grouse response to such manipulations has often been lacking or non-existent. The objective of our study was to determine the response of sage-grouse to sagebrush reduction treatments that have …

Modeling Bark Beetle Outbreak And Fire Interactions In Western U.S. Forests And The Invasion Potential Of An Invasive Puerto Rican Frog In Hawaii Using Remote Sensing Data, Simon A. Bisrat

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I used Moderate-Resolution Imaging Spectroradiometer (MODIS) imagery to answer two ecological questions. In the first project, I investigated the interactions between bark beetle-caused tree mortality and fire occurrence in western U.S. forests. I used remotely sensed fire data detected by MODIS satellite and bark beetle-caused tree mortality data. I tested the hypothesis that there is an increased probability of fire incidence in bark beetle-damaged forests compared to healthy forests using conditional probability modeling across the national forests of the western U.S. regardless of forest type. My results did not show a consistent pattern (increase or decrease of conditional probability of …

Factors Affecting Reading Outcomes Across Time In Bureau Of Indian Education Reading First Schools, Heather J. Chapman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Regardless of age, background, or socioeconomic status, children must learn to read in order to be successful in school and in their future careers. Reading is an essential skill necessary to be successful in all other academic content areas. Despite the importance of this skill, American Indian children consistently score below the national average on tests of reading ability and reading comprehension. During recent years, many schools in the Bureau of Indian Education (BIE) system requested funding through the Reading First initiative. Schools used the funding and support provided by the BIE Reading First grant to attempt system-wide change at …

The Influence Of Collective Action And Policy In The Development Of Local Food Systems, Lori Porreca

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The modern global agrifood system has had significant negative impacts on consumers and producers. This has precipitated the rise of local food systems that are purported to improve the health and livelihoods of consumers and producers. High expectations have led to significant public and private resources dedicated to the development of local food systems. Despite this, there has been little systematic research exploring the social and institutional conditions that facilitate or frustrate local food system development.

Using a comparative case study approach, this study explored the ways local structural conditions, collective action, food system policies, and the political context affect …

The Hypericum Perforatum Herb As An Antimycobacterial Agent And Its Implications As An Additional Tuberculosis Medication, Trent W. Mortensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An immediate demand exists for new tuberculosis (TB) antibiotics due to the ever-increasing spread of drug-resistant strains. The drug-development process goes through four phases, the first (Phase 0) of which is to demonstrate and investigate drug effectiveness and toxicity. This research investigated the effectiveness of the Hypericum perforatum herb (commonly St. John's wort (SJW)) in its growth inhibition of mycobacteria and its viability effect on human lung cells.

Organic-solvent SJW extracts were effective at inhibiting every nonpathogenic genetically sequenced Mycobacterium isolate currently available (six isolates) in preliminary studies. Quantitative studies of five Mycobacterium isolates showed an order of concentration sensitivity …

The Impact Of The Physical Environment On The Social Integration Of Individuals With Disabilities In Community, Keith M. Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Social integration in community is especially important for individuals with disabilities well-being. Although individuals with disabilities reside within the community's physical environment, they are often marginalized in the social environment. This may be the result of individuals with disabilities residing in physical environments that negatively affect opportunities for integration in the social environment. However, there has been little investigation to understand the impact of the physical environment on the social integration of individuals with disabilities in community.

The purpose of this investigation was to (a) examine the current body of evidence concerning the impact of a community's physical environment on …

Editorial Pages And The Marketplace Of Ideas: A Quantitative Content Analysis Of Three Metropolitan Newspapers, Jacob Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to identify the nature of the content devoted to the 2008 presidential election in the editorial pages of three newspapers. The research sought to discover what percentage of the content was specific to the election, whether this election-centered content focused on the campaign or on specific issues, what issues were covered, and the role in which the author was writing. This study used a comparative quantitative content analysis to examine this content appearing during the final three months of the 2008 campaign in the Philadelphia Inquirer, the Dallas Morning News, and the San Francisco …

Three Essays On Environmental- And Spatial-Based Valuation Of Urban Land And Housing, Lu Liu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation attempts to provide a comprehensive examination on the non-market valuation of the effect of open space amenities and local public infrastructure on the value of urban land and housing with both spatial heterogeneity and project heterogeneity. The demand for raw land is a derived demand for housing built on it. Therefore, we need to examine the land market and the housing market together. On the one hand, we estimate the value of urban land in a market that does not satisfy the usual assumptions of a competitive market structure as well as incentive incompatibility issues for transaction participants, …

Survival Of Mycoplasma Species In Recycled Bedding Sand And Possible Implications For Disease Transmission To Ruminants, Anne E. Justice-Allen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mycoplasmas are a group of bacteria which are small in size, lack a cell wall, and have small genomes in comparison to other bacteria. The members of the group that are pathogenic utilize several mechanisms to evade the host's immune system. These processes affect surveillance and control mechanisms such as serologic testing and vaccination. Many of these organisms cause diseases of livestock, which heavily impact production parameters such as weight gain, milk yield, and egg production. Mycoplasmas also cause disease in people.

Mycoplasma spp. can cause mastitis, metritis, pneumonia, and arthritis. The currently documented routes of transmission of Mycoplasma spp. …

Comparative Performance Of Fluorometry And High Performance Liquid Chromatography In The Detection Of Aflatoxin M1 In Two Commercial Cheeses, Gustavo Peña

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aflatoxin M1 (AFM₁) is frequently found in milk and dairy products. It is a metabolite formed in cows from aflatoxin B1 (AFB₁), contained in animal feeds. In cheese production AFM₁ distributes between curds and whey. In this study, cows were fed 64 µg/AFB₁/d for the high treatment, and 5 µg/AFB₁/d for the low treatment, to obtain milk contaminated with AFM1 over the 0.5 µg/L and under 0.05 µg/L restrictions, respectively. Cheese was manufactured with milk contaminated with AFM₁ at 0.8 and 0.03 ìg/kg by the higher and lower …

Correlation Of Age-Specific Phenylalanine Levels On Intellectual Outcome In Patients With Phenylketonuria, Krista S. Viau

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study includes data collected from a retrospective chart review of patients with phenylketonuria treated at the University of Utah Metabolic Clinic. Among the
approximately 175 patients treated for phenylketonuria at this clinic, 55 patients (28 female) met the inclusion criteria for the present study. Based on the diagnostic Phe
level, 66.7% were classified as having classic phenylketonuria, 18.5% with moderate phenylketonuria, and 14.8% with mild phenylketonuria.

Subjects’ cognitive status was measured with one of three neuropsychological tests: Wechsler Intelligence Scale for Children third and fourth editions and the Wechsler Adult Intelligence Scale third edition. Due to structural differences among …

Financial Management Practices And Conflict Management Styles Of Couples In Great Marriages, Amanda Marie Horrocks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study presents findings on the financial management practices and degrees of conflict of couples in great marriages. Qualitative data from a national sample of couples in great marriages were collected using a 31-page questionnaire. Of the 81 couples who responded, 40 fit the criteria for this study in that they discussed their level of agreement about financial issues in marriage. Their responses were coded to discover which financial topics are pervasive and whether or not couples agreed over these topics. Responses about conflict were also analyzed to determine the degree of agreement between spouses in different categories. Findings from …

"All The World's A Stage": Parental Ethnotheories And Children's Extracurricular Activities, Mary Annette Grove

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the United States, educators, parents, policy makers, politicians, the media, researchers, and practitioners in many academic fields have taken an interest in outcomes for children aged 6 to 14 who participate in extracurricular activities outside of school time. Very little research examines parents' beliefs about and behaviors surrounding their children's participation in extracurricular activities. Yet, it may be parents' beliefs that guide choices about and persistence in extracurricular activities. This study used a phenomenonlogical and qualitative approach toward understanding parents' ideas and beliefs about their child's participation in extracurricular activities. These ideas and beliefs or parental ethnotheories are what …

Hold, Hold, My Heart, Andrew Berthrong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis consists of a traditional introduction followed by a first-person, fictional story told in seven chapters. The story begins with the protagonist in his apartment preparing to write, a brief account of his stalling, and then his beginning to write. Those chapters taking place in the vicinity of the apartment are in the present tense and those relating past adventures are written in third person, one chapter for each adventure: Africa, sailing, and Navajo Mountain. After each adventure, the narration returns to the apartment.

This piece is the embodiment of both the vigorous internal work in search of understanding …

Cedar Middle School's Response To Intervention Journey: A Systematic, Multi-Tier, Problem-Solving Approach To Program Implementation, Shannon Kay Dulaney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the present study was to record Cedar Middle School's (CMS) response to intervention implementation journey. It is a qualitative case study that examines one school's efforts to bring school improvements under the response to inventory (RtI) umbrella in order to achieve a more systematic approach to providing high-quality educational services to every student enrolled at CMS. Participants included the 10 members of the school's Student Success Team along with the principal and assistant principal. The recorded journey included: (a) a description of the RtI consensus and infrastructure-building processes, (b) an exploration of the SST perceptions of school-wide …

Does Empathic Accuracy Mediate The Relationships Between Individual Psychological Characteristics And Adolescent Romantic Relationship Functioning?, Charles George Bentley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated empathic accuracy in adolescent romantic relationships. The project examined the relationships between psychological characteristics and relationship outcomes (i.e., satisfaction and aggression) to determine if the relationships were mediated by empathic accuracy. Participants were 92 heterosexual couples aged 14-18 years old who lived in rural areas in Utah and Arizona. Couple members completed surveys assessing attitudes and behaviors in their relationships and a video-recall procedure in which partners rated their own and their partner's behaviors during problem-solving discussion.

Empathic accuracy was generally not related to psychological characteristics or outcomes. It became apparent that there were limitations with the …

Fundamentals Of Operation Of The Induced Bed Reactor (Ibr) Anaerobic Digester, Jacob Shaun Dustin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Induced Bed Reactor (IBR) was developed at Utah State University to apply high-rate anaerobic digestion techniques to high solids content substrates. This technology has been successfully implemented at full-scale multiple installations in the United States and Canada as a waste treatment and energy production technology, but the physical processes necessary to further optimize the system were not well understood.

Bench scale IBRs were operated as anaerobic digesters at 35°, 45°, and 55° C under three organic loading rates and three corresponding hydraulic retention times. Reactor performance was monitored at steady state for residence time distribution and substrate reduction.

The …

Investigating The Reliability And Validity Of The Consortium On Reading Excellence (Core) Phonics Survey, Lorilynn B. Brandt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Phonics was identified as one of the critical components in reading development by the National Reading Panel. Over time, research has repeatedly identified phonics as important to early reading development. Given the compelling evidence supporting the teaching of phonics in early reading, it is critical to make sure that instructional decisions in phonics are based upon valid and reliable assessment data. This study examined the psychometric properties of the Consortium on Reading Excellence (CORE) Phonic Survey and was designed to establish instrument validity and reliability. Analyses indicated moderate to very strong validity and reliability coefficients. Additionally, a D study using …

Characterizing Ecologically Relevant Variations In Streamflow Regimes, Kiran J. Chinnayakanahalli

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Maintaining the ecological health of streams is vital for sustainable water resources management. Streamflow is a primary factor influencing the structure and function of ecological communities. A quantitative understanding of how stream biota respond to variation in streamflow is required for stream bioassessment. This dissertation focuses on quantifying relationships between streamflow regime and stream macroinvertebrate richness and composition. The contribution comprises statistical models that predict stream macroinvertebrate class from streamflow regime and predict streamflow regime from watershed attributes, and a tool that helps derive watershed attribute variables used in these models.

The dissertation is a collection of three papers. In …

The Ecological Influences Of Community Trail Use And Physical Activity Among Female Trail Users, Sarah N. Moulton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Despite great effort to improve physical activity, little success has come to pass. Due to this, some researchers have shifted from individual approaches to promoting physical activity to multilevel environmental approaches. One of these multifaceted environmental approaches is through community trails. A small body of research has suggested that community trails may be a successful ecological approach to promoting physical activity. However, the research is minimal and inconsistent in supporting effectiveness of community trails for promoting physical activity.

This study sought to examine ecological factors to learn if and how they might influence trail use among women. The ecological factors …

Mechanisms Of The Extreme Sensitivity Of Turkeys To Aflatoxin B1, Sumit Rawal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The pathogenesis of hepatotoxic and hepatocarcinogenic actions of the mycotoxin aflatoxin B1 (AFB1) involves initial bioactivation by microsomal cytochrome P450s (P450) to a reactive and electrophilic intermediate, exo-aflatoxin B1-8,9-epoxide (exo-AFBO). Poultry, especially turkeys, are extremely sensitive to AFB1, a condition associated with efficient epoxidation by P450s. The purpose of this research was to 1) discover and characterize the P450s in turkey liver responsible for AFB1 bioactivation, and 2) determine the relative importance of these P450s in turkey liver.

Initial investigations led to the discovery of CYP1A5. We then identified CYP3A37, a human CYP3A4 homologue from turkey liver, …

Characterization And Physicochemical Modifications Of Polymer Hollow Fiber Membranes For Biomedical And Bioprocessing Applications, Benjamin R. Madsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hollow fiber membranes (HFMs) formed through phase inversion methods exhibit specific physicochemical characteristics and generally favorable surface and mechanical properties, supporting their use in diverse applications including ultrafiltration, dialysis, cell culture, bioreactors, and tissue engineering. Characterization of, and modifications to, such membranes are important steps in achieving desired characteristics for specific applications.

HFMs subject to gas, irradiation, and chemical sterilization techniques were characterized based on several analytical techniques. It was revealed that these common sterilization techniques can cause inadvertent changes to HFM properties. While these changes may cause detrimental effects to HFMs used in filtration, the methods of sterilization are …

Intercomparison Of Prism And Daymet Temperature Interpolation From 1980 To 2003, Rebecca A. Scully

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As ecosystem modeling becomes increasingly integrated with Geographic Information Systems (GIS) there is a rise in demand for spatially and temporally continuous meteorological data. But in order to justify management decisions or to provide robust scientific insights, the accuracy of meteorological data used as model input must be thoroughly quantified. Current methods to create spatially continuous climate data from discrete weather station data include inverse distance weighting, geostatistical techniques such as kriging and splines, local regression models such as Parameter-Elevation Regression on Independent Slope Model (PRISM) and Daymet, and regional regression models. For the conterminous United States, PRISM and Daymet …

Altering Positive/Negative Interaction Ratios In Relationships Of Mothers And Young Children: A Preliminary Investigation, Andrew B. Armstrong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Based on classic marital research of John Gottman, a popular notion exists that interpersonal relationships thrive when the number of positive interactions outweighs negative interactions by a ratio of five to one. Though many have given similar advice for parents and caregivers, Gottman's findings and methodology may not generalize to relationships of parents and young children. Were similar ratio findings to be validated for parent-child relationships, explicit ratio advice may be incorporated as a component of clinical practice (e.g., behavioral parent training). To begin investigating potential clinical implications, a project was conducted that examined mothers' ability to achieve prescribed ratios …

Water Allocation Challenges In Rural River Basins: A Case Study From The Walawe River Basin, Sri Lanka, D. K. Neelanga Weragala

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation evaluates the water allocation challenges in the rural river basins of the developing world, where demands are growing and the supply is limited. While many of these basins have yet to reach the state of closure, their water users are already experiencing water shortages. Agricultural crop production in rural river basins of the developing world plays a major role in ensuring food security. However, irrigation as the major water consumer in these basins has low water use efficiency. As water scarcity grows, the need to maximize economic gains by reallocating water to more efficient uses becomes important. …

The Relationships Among Caregiver Training, Mentoring, And Turn-Taking Between Caregiver And Child In Family Child Care, Carrie L. Ota

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Basic communication skills are foundational for children's success in school and are dependent largely on their language experiences early in life. The purpose of this study was to examine two professional development models and family child care providers' use of turn-taking strategies that promote language in young children. The first professional development model consisted of a 10-hour nonformal training focused on supporting early language development. The second included the nonformal training and on-site mentoring. The 48 family child care programs were randomly assigned to one of the professional development models or a control group. Hierarchical linear modeling was used to …

Field And Smog Chamber Studies Of Agricultural Emissions And Reaction Products, Derek J. Price

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Agricultural emissions are an important contributor to atmospheric aerosol. These emissions include nitrogen containing organic compounds, primarily as amines, which have not been well investigated to date. Although there have been several studies that have looked at the emission of gas phase amines, there are only a few studies that have focused on ambient amine-based aerosol. There have also only been a handful of smog chamber studies that have investigated amine aerosol chemistry. Kinetic studies have looked at the reactions of amines with OH and ozone. However, amine reactions with nitrate radical (NO₃) are not well understood. Several …

Family-Owned Businesses: Determinants Of Business Success And Profitability, Jeffrey S. Wallace

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine many factors associated with family-owned businesses that lead to business success and profitability. The panel data used in this study came from the 1997 and 2000 waves of the National Family Business Study (NFBS). Many independent variables from the 1997 wave (e.g., age, gender, managerial activities, business size, home-based, business problems) were tested to predict business success and profitability (dependent variables), which were variables from the 2000 wave.

Some of the descriptive analyses indicated that, compared to female managers, male managers perceived less business success, participated more in managerial activities, managed older …

Ultimate Shear Capacity And Residual Prestress Force Of Full-Scale, Forty-One-Year-Old Prestressed-Concrete Girders, Parry Osborn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ultimate shear capacity of prestressed concrete beams is difficult to predict accurately, especially after being in service for an extended period of time. The Utah Department of Transportation asked researchers at Utah State University to experimentally determine the existing shear capacity of 41-year-old prestressed, decommissioned concrete bridge girders and then provide recommendations on how to increase that ultimate shear capacity. This thesis presents the research findings that relate to the existing shear capacity of the prestressed concrete girders.

Eight AASHTO Type II bridge girders were tested up to failure by applying external loads near the supports to determine their …

Noncontingent Delivery Of Preferred Stimuli To Treat Problem Behavior In The Classroom, Nicole P. Miles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Students with emotional and behavioral disorders (EBD) have very poor long-term outcomes. Non-contingent reinforcement (NCR) has been used to successfully reduce problem behaviors. NCR is frequently used with populations with severe disabilities and in hospital settings using function based reinforcers. Very few studies have applied the use of NCR to EBD populations, and to students whose cognitive scores fall within the normal range. No studies have examined the use of preferred tangible reinforcers delivered non-contingently with participants with EBD or in classroom settings. This study measured the effects of delivering tangible reinforcers selected through preference assessments on the disruptive and …