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Hazard Classification And Hydraulic Remediation Options For Flat-Topped And Ogee-Crested Low-Head Dams, Riley J. Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The dangerous hydraulic conditions that can form downstream of a low-head dam were investigated. These dangerous hydraulic conditions have been the cause of hundreds of drowning incidents since the construction of the first low-head dams. Two primary objectives were identified for this study, each of which were primarily performed using the Computational Fluid Dynamics software, Flow-3D^®, with physical models used to verify the numerical results. The first objective was the identification of a risk factor made up of easily measured parameters that could accurately predict when the dangerous hydraulic conditions are present at a low-head dam. The risk …

Cougar Predation Behavior In North-Central Utah, Dustin L. Mitchell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Today’s ability to apply global positioning systems (GPS) collars to wild animals and track their movements, without inadvertently disrupting their daily routine, is a major benefit to wildlife research. Cougars are carnivorous predators that have been identified as being one of several possible causes for recent mule deer population declines throughout the Western United States. Past cougar predation studies have relied on snow tracking, radio-collar tracking, and modeling techniques to estimate cougar prey use and predation rates. These methods rely heavily on weather conditions, logistical availabilities, and broad assumptions, which have led to a wide range of predation rate estimates. …

Characterization And Potential Utility Of Porcine Trophoblast-Derived Stem-Like Cells, Edison A. Suasnavas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In mammalian pregnancy, the placenta is a very important organ which helps to establish a healthy pregnancy. Its functions could be described in four points: 1) It allows the fetus to receive gases and nutrients from the mother in a safe way; 2) it lets the fetus get rid of waste through the mother's kidneys; 3) it releases essential pregnancy-related hormones and growth factors that let the uterus hold the fetus; 4) it secretes immune response regulators to give the fetus immune protection against the mother. Abnormalities in the placenta can be the cause of death to the fetus. Mammalian …

Needs Assessment For Promoting Livestock And Equine Safety For Diné Youth, Karah L. Shumway

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This project was funded through the National Children's Center for Rural and Agricultural Safety and Health as part of the pilot study program for 2011-2012 fiscal year. The project team proposed a one-year, $19,991 project to conduct a formative needs assessment of Diné parents for the prevention of agricultural injuries to children who are helping farm or ranch. The assessment utilized a survey constructed of closed and open ended questions to gauge Diné farmers' and ranchers' perceptions of injury risks to children who live or work on an agricultural operation. Additional questions were asked to gauge Diné acceptance of an …

Evidence Of Agrarian Urbanism: Land Use Preferences Of Residents Living On Small Acreage Farms Or Large Lots With Animal Rights In Cache Valley, Utah, Laurie B. Hurst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Until the last half century, land development patterns in the Intermountain West were designed after the Mormon settlement pattern. With its gridiron streets and in-town farmsteads, this pattern gave families the opportunity to grow crops and raise a few animals on their one acre or less in town, with the added advantage of having a social life. In many places over the last century, cities have grown, small farms have dwindled, and large farms have been pushed to the fringe. However, in the Intermountain West the agrarian tradition continues with a number of families who grow gardens and raise animals …

The Effects Of Simultaneous Script-Training And Fading Procedures On The Mand Variability Of Children With Autism, Kristen N. Kelley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Individuals with autism often display rote and repetitive responding across behavioral topographies. One area that is often affected is the individual’s verbal repertoire. In an attempt to build and expand verbal repertoires, script and script fading procedures have often been implemented to teach individuals new and varied verbal behavior. Script training and fading procedures have also been used specifically to remediate deficits in an individual’s mand repertoire. Researchers have examined the effects of script training and fading procedures on the variability within an individual’s mand repertoire. This line of research is of great importance since a lack of variability in …

Novel Aminoglycosides: Bioactive Properties And Mechanism Of Action, Sanjib K. Shrestha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

More than 90% of crop diseases are due to fungal infections, which globally cause enormous economic losses. Fungal infections in humans and animals have also become a serious concern, especially in immunocompromised individuals. However, only a few new fungicides have been introduced since the mid-1980s, and concerns with inconsistent and declining effectiveness due to resistance, environmental impacts, animal and human toxicity, and costs continue to challenge the use of available fungicides. There is a serious and persistent need for new antifungal agents that are more effective, eco-friendly, less toxic, and available at reasonable cost.

This study reveals two novel aminoglycosides, …

Improving Surrogate Monitoring Techniques For Suspended Sediment, Brant R. Whiting

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The quality of water of our nation’s rivers and streams is important to many vital uses including drinking water treatment, recreation, and the natural environment. Water quality can be severely impacted by the quantity and type of suspended sediment found therein. Because suspended sediment can be associated with many other contaminants that degrade water quality, it is noted as the most common impairment to water quality in the United States. Suspended sediment can cause significant ecological impacts to the chemical and biological characteristics of surface waters. The ability to accurately quantify suspended sediment concentrations at the appropriate time(s) and location(s) …

Apoptotic And Epigenetic Induction Of Embryo Failure Following Somatic Cell Nuclear Transfer, Aaron Patrick Davis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The cloning of domestic species has tremendous potential, as the technology can be used in selective breeding, conservation, and the production of transgenic animals. The technique of cloning involves the transplant of DNA from a cell to a recipient gamete. Following transfer to a surrogate, the cloned embryo may successfully complete development to a live offspring. Despite intensive research, the success rate of cloning remains prohibitively low, and the potential benefits of cloning have not yet been realized. Embryos produced from cloning suffer from high rates of embryo degradation, implantation failure, and abortion. The goal of this dissertation research project …

An Ecofeminist Perspective On The Influences That Promote And Restrict Three Early Childhood Educators' Inclusion Of Open-Ended Outdoor Learning, Anne K. Mackiewicz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to explore the influences that promoted and restricted three women early childhood educators' inclusion of open-ended outdoor learning in a Head Start center. With the recorded history of human's impact on nature, along with the majority of women in the early childhood workforce, I chose a theory, ecofeminism, that looked at both the domination of women and nature in the early childhood setting.

The methods included participant interviews, observations, and a study of the site's documents. Four themes were identified as promoting or restricting open-ended outdoor learning. These themes included: (a) participant's attitudes, (b) …

Effects Of Integrating Mathematical Concepts Into An Animal Science Curriculum, Andrea Rae Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nationwide, mathematical scores have been a topic of concern among elementary and secondary educators for many years. Teaching contextualized math has been found to be effective and includes providing a direct application to real-life scenarios rather than teaching linear equations and algebraic principles outside of their application.

A study was conducted measuring the effects of integrating mathematical skills in an animal science curriculum. All students were taught a unit of instruction about animal nutrition and feeding. The control group received a typical nutrition unit and the treatment group received the same unit of instruction with the addition of mathematical skill …

Diet-Induced Obesity Decreases Liver Iron Stores In Mice Fed Iron Deficient, Adequate, Or Excessive Diets, Brett J. Healy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Epidemiological and observational evidence suggests that obesity is related to poor Fe status. To determine interactions between obesity, dietary Fe intake and Fe status; male, weanling C57BL/6J mice were fed either high fat diets to induce obesity or a standard diet for 16 weeks. Fe concentrations of both the high fat or control diet (4.5 vs 3.8 kcal/g) were set at: 5, 50 or 500 mg Fe/kg diet. Mice fed the high fat diets had significantly higher percentage body fat (17.9%) compared to mice fed control diets (5.3%, P<0.001). Among obese mice, dietary Fe levels did not significantly influence body composition. Conversely among lean mice, mice fed the iron excessive diet had significantly less fat mass when compared to mice fed the iron deficient diet (P<0.05). Obesity and/or dietary Fe concentration did not significantly affect plasma Fe levels. ANOVA analysis showed significant effects of diet-induced obesity, dietary Fe and an interaction between both factors on liver Fe levels (P< 0.05). Obese mice had significantly lowered liver Fe levels compared to lean cohorts fed the same amount of dietary Fe (P<0.05 for all comparisons). Moreover, lean mice fed the Fe deficient diet (5 mg Fe/kg diet) had similar liver Fe levels (127 mg Fe/kg ± 0.04) compared to obese mice fed the 50 mg Fe/kg diet (132 mg Fe/kg ± 0.05). These data suggest that obesity, independent of dietary Fe intake, influences liver Fe stores.

Studies On Nitrogen And Silicon Deficiency In Microalgal Lipid Production, Curtis Adams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Microalgae are single celled plants that inhabit aquatic and terrestrial environments across the planet. Many species are oleaginous, which means they are capable of producing oils, similar to many higher plants we are familiar with like canola, safflower and coconut. Different from higher plants, however, algae have simple structures that allow them to grow at very high rates. Due to these characteristics—oil production and rapid growth rates—algae are considered a promising future source of oil. Algal oils could be useful for production of food for people, feed for animals, biodiesel, detergents, and many other applications.

Algae have not been heavily …

Risk And Climate At High Elevation: A Z-Score Model Case Study For Prehistoric Human Occupation Of Wyoming's Wind River Range, Ashley K. Losey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Holocene climate likely influenced prehistoric hunter-gatherer subsistence and mobility as changing climate patterns affected food resources. Of interest here is whether climate-driven resource variability influenced peoples in the central Rocky Mountains. This study employed the z-score model to predict how foragers coped with resource variability. The exercise enabled exploration of the relationship between climate, resources, and foraging strategies at High Rise Village (48FR5891), an alpine residential site in Wyoming's Wind River Range occupied between 2800-250 cal B.P. The test was applied to occupations dating to the Medieval Warm Period (1150-550 cal B.P.) and the Little Ice Age (550-100 cal B.P.). …

The Psychological And Physiological Effects Of Using A Therapy Dog In Mindfulness Training, Courtney L. Henry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the psychological and physiological effects of adding animal-assisted therapy to a modified mindfulness-based stress reduction program (MBSR) for clients experiencing psychological distress, including anxious and depressive symptoms. State and trait mindfulness, state and trait anxiety, psychological distress, blood pressure, and heart rate were collected during each session of the intervention from college students recruited at Utah State University. Results support that participants experienced less anxiety and depressive symptoms and increased mindfulness skills from pre- to posttreatment. No significant difference was found between the control and experimental groups, indicating that that interaction with a therapy dog had no …

Effects Of Inorganic Nutrients And Dissolved Organic Carbon On Oxygen Demand In Select Rivers In Northern Utah, Joseph L. Crawford

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Our nation’s waterways are a valuable resource whose quality is influenced by their surroundings as well the amount of nutrients (largely nitrogen and phosphorus) in the water. Nutrients play an important role in aquatic ecosystems; however, if nutrient levels become too high, it is detrimental to water quality. Excess fertilizer that runs off of agricultural land and into the rivers and streams is a common source of nutrients in our waterways. Other sources of nitrogen and phosphorus include effluent released from wastewater facilities.

There are many negative side effects of high nutrients in the water. They can create large algal …

Most Progress Made Algorithm: Combating Synchronization Induced Performance Loss On Salvaged Chip Multi-Processors, Jacob J. Dutson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Most modern personal computers come with processors which contain multiple cores. Often, one or more of these cores is damaged during manufacturing. These faults are increasing as manufacturers try to make processors run faster. Many processor designs allow a damaged core to continue working after manufacturing, but these salvaged cores run slower than a fully functional core.

In an attempt to make software run as fast as possible for its users, software designers write applications that are split into multiple parts called threads. These threads can be run on separate cores at the same time and get more work done …

Interspecific Interactions Between Penstemon Palmeri And Shrubs In The Arid Shrublands Of The Spring Mountains, Nevada, Jesse M. Poulos

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A project involving shrub removal was undertaken by the United States Forest Service in the Spring Mountains National Recreation Area (SMNRA) to reduce accumulated woody fuels, which can pose risks to human communities. The SMNRA is also home to a variety of species that occur within these fuel reduction boundaries and are protected under the Multiple Species Habitat Conservation Plan (MSHCP) of Clark County, Nevada. It is unknown how MSHCP covered species will respond to shrub removal. This research focuses on the interactions between shrubs and the herbaceous plant Palmer’s penstemon (Penstemon palmeri), one of many nectar sources …

Growth Performance And Nutrient Metabolism Of Pasture-Finished Beef Steers And In Vitro Fermentation Characteristics Of Pasture Forages In Continuous Cultures, Cuk Tri Noviandi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A 2-year grazing study was conducted to evaluate the growth performance, ruminal fermentation, carcass characteristics, and fatty acid compositions in subcutaneous adipose tissue of beef steers grazing tall fescue (Festuca arundinacea Shreb.; TF) pastures without or with N fertilization. Nitrogen fertilization increased crude protein concentration of TF pasture and average daily gain of beef steers. Increase in total volatile fatty acids (VFA) and ammonia-N (NH₃-N) concentrations were detected in steers grazing fertilized TF. In comparison with steers on feedlot, pasture-finished steers had greater proportions of cis-9, trans-11 CLA and C18:3 n-3, …

Colorado River Cutthroat Trout Habitat Resistance And Resilience To Climate Change, Kate H. Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Government agencies and private organizations spend large amounts of public money attempting to return ecosystems to a more natural state, which have often been harmed or even destroyed as a result of modern development. Colorado River cutthroat trout, Oncorhyncus clarki pleuriticus, are a subspecies of cutthroat trout. Cutthroat trout live in the Rocky Mountains of the western United States. The population of this particular subspecies has been severely reduced by human actions, and currently only 12% of its historic populations still exist. To improve the condition of cutthroat trout, fisheries professionals and biologists are working to restore natural populations. …

American Debtors' Prison: The Rise Of The New York Citizen As A Commercial Participant During The Early American Republic, 1800-1836, Ryan M. Braeger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The following research explores the development of financial culture in the early American republic through the examination of New York's use of debtors' prisons. Beginning with the construction of the historical context surrounding the passage and abolition of the National Bankruptcy Act of 1800, the project takes use of a series of archival sources that exemplify the character of credit in early American economic practices. The emergence of republican financial culture was often at odds with federal judicial and legislative action, the result of which was the creation of state policy and third party organizations dedicated to solving the plight …

Late Prehistoric Technology, Quartzite Procurement, And Land Use In The Upper Gunnison Basin, Colorado: View From Site 5gn1.2, Jonathan Mitchell Peart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis presents the results from archaeological test excavations at site 5GN1.2. The focus of this research is to evaluate Stiger’s Late Prehistoric settlement-subsistence hypothesis. According to Stiger, post-3000 B.P. occupations of the Upper Gunnison Basin were limited to big-game hunting forays originating from base camps located outside of the basin. Test excavations at 5GN1.2 documented archaeological deposits reflecting aboriginal occupation during the Late Prehistoric between about 3000 and 1300 years ago. Archaeological features include four hearths associated with abundant small-mammal remains, burnt plant seeds, stone tools and stone tool manufacturing debris.

Archaeological evidence rules out site 5GN1.2 as a …

Strategic Approaches To Develop Optimal Feeding Program Of Brown Midrib Corn Silage To Lactating Dairy Cows In The Intermountain West, Michael Shane Holt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In two lactation studies reported in this dissertation, it was hypothesized that feeding 35% brown midrib corn silage (BMRCS) and 25% alfalfa hay (dry matter basis) would result in increased dry matter intake (DMI) around peak lactation compared with feeding conventional corn silage (CCS), causing longer peak milk production, and that feeding dairy cows in early lactation a 16% crude protein diet with fair quality alfalfa hay (FAH) in BMR-based diets would maintain milk production, reduce urinary N excretion, and improve N efficiency compared to those fed high quality alfalfa hay ( …

Assessing Vehicle-Related Mortality Of Mule Deer In Utah, Daniel D. Olson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Roads are essential in modern societies, but as populations grow and traffic volumes rise, roads will continue to be built and expanded. As a result, the effects that roads have on wildlife will likely intensify, making it imperative that managers understand those effects so mitigation can be directed accordingly. In Utah, considerable areas of mule deer (Odocoileus hemionus) habitat have been bisected by roads. Mule deer are commonly involved in vehicle collisions and there is concern that roads and vehicle traffic are impacting populations. This project was conducted to determine the number and demographic effects of deer-vehicle collisions, …

Cationic Starch Synthesis, Development, And Evaluation For Harvesting Microalgae For Wastewater Treatment, Renil John Anthony

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Microalgae are the preferred crop for the production of biodiesel. Microalgae are microplants that have the ability to harness sunlight more efficiently than other plants and store 20-80% lipids per g of dry algae in their cells. Microalgae have the extraordinary ability to grow in brackish water or wastewater. Microalgae can be grown in municipal wastewater to uptake phosphorus and nitrogen and remediate the wastewater of these nutrients. Microalgae thus cultivated accomplishes a dual role of wastewater treatment and provides a sustainable feedstock for biofuels and other bioproducts.

This study focused on efficiently harvesting microalgae from water using modified starch. …

Causes And Consequences Of Local Variability In Aroga Websteri Clarke Abundance Over Space And Time, Virginia L.J. Bolshakova

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sagebrush steppe habitat is rapidly declining in the Intermountain West in both quality and quantity. Observed reductions in animal and bird populations associated with sagebrush, invasion of exotic annual grasses such as cheatgrass (Bromus tectorum), and other concerns with climate change have led to a growing awareness of the need to monitor and better understand the rate of habitat loss. Sagebrush lands are subject to periodic loss caused by insect feeding damage, and human activities have the potential to promote unnaturally high levels of such loss. The sagebrush defoliating Aroga moth, Aroga websteri Clarke (Lepidoptera: Gelechiidae), can kill …

A Comparison Of Resistance To Extinction Following Dynamic And Static Schedules Of Reinforcement, Andrew R. Craig

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Behavioral momentum theory states that the Pavlovian stimulus-reinforcer relation governs resistance to extinction. Thus, higher baseline reinforcer rates should produce more persistent behavior than lower baseline reinforcer rates. Though this positive relation generally is observed when behavior is maintained and subsequently disrupted in multiple schedules, the opposite relation is observed when single schedules are used. An alternative framework of extinction performance based on Bayesian change detection may be applied intuitively to describe resistance to extinction in single schedules of reinforcement. This approach asserts that detection of changes in reinforcer rates during extinction should be easier following training with rich reinforcer …

Vital Rates, Population Trends, And Habitat-Use Patterns Of A Translocated Greater Sage-Grouse Population: Implications For Future Translocations, Orrin V. Duvuvuei

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Greater sage-grouse (Centrocercus urophasianus; sage-grouse) populations have declined range-wide with some local populations exhibiting dramatic decreases. In 2009–2010, radio-marked hens (30 hens in 2009 and 30 hens in 2010) were translocated from Parker Mountain in south-central Utah to augment a rapidly declining population on Anthro Mountain in northeastern Utah. Thirty-two resident female sage-grouse on Anthro Mountain were also radio-collared from 2009–2012.

I compared population vital rates (i.e., nest and brood success, and survival) of resident and translocated hens in Anthro Mountain’s population to those of a translocated population in Strawberry Valley, Utah and the source population. Of these …

Integrated Management Of Downy Brome (Bromus Tectorum L.) Infested Rangeland, Heather Elwood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Invasive weed species are a threat to the health and functionality of many rangeland systems. Downy brome (Bromus tectorum) is an invasive annual grass that affects the productivity of rangelands by decreasing the grazing capacity for livestock as well as altering the wildfire cycle and competing against more desirable vegetation for limited resources.

In 2006, an Invasive Plant Management Plan and Environmental Assessment was approved for Dinosaur National Monument, calling for prioritization of invasive species management on high value wildlife habitat, vector areas, and for species with a high ecological impact. The Cub Creek Watershed was identified as a priority …

Ecology Of Coyotes On The Valles Caldera National Preserve, New Mexico: Implications For Elk Calf Recruitment, Suzanne J. Gifford

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Valles Caldera National Preserve (VCNP) managers were concerned about low elk recruitment observed at the same time as an apparent increase in sightings of coyotes and observations of coyote predation on elk calves. The goal of this study was to describe coyotes’ ecological interactions with elk, particularly coyote diet and movements on the Valle Grande, a large grassland meadow in the southeastern portion of the VCNP.

We examined coyote diet by quantifying undigested remains of food items in coyote scats (feces). The most frequent taxa were rodents (montane voles and pocket gophers), elk (adult and calf), insects (grasshoppers and beetles), …