Digital Commons Network^™

Should Ranchers Value Sagebrush? Why We Need Sagebrush, Beth Burritt, Thomas Monaco, Eric Thacker

All Current Publications

This fact sheet describes the value of sagebrush to ranchers. Big sagebrush is beneficial to grasses and forbs growing under its canopy by supplying them water, nutrients,organic matter and protection from overgrazing. It provides food and cover for a number of birds, reptiles, small mammals and beneficial insects. It can provide winter forage for both wildlife and livestock. Lastly, it is an important plant for revegetation efforts in the West.

Nutritional Value And Toxins In Various Noxious Weeds, Beth Burritt, Rae Ann Hart

All Current Publications

Teaching animals to eat noxious weeds may be a solution to reducing noxious weeds. Grazing animals often avoid eating weeds due to novelty even though weeds are often as nutritious as many of our planted pasture and rangelands species. This fact sheet provides livestock producers with the nutritive values of many common weeds. These values were summarized from a variety of peer-reviewed journal articles.

Examining The Relationship Between Parental Overprotection, Use Of Assistive Technology, And Independence With Routines Among Children With Physical Disabilities, Kelsey I. Shinnick

Honors Theses

The primary purpose of the present study was to investigate the relationships between parental overprotection/overindulgence, assistive technology utilization, and independence with routines among children with physical disabilities. Participants included 26 primary caregivers of children with physical disabilities age 6 to 12 (M = 8.65, SD = 2.00). Data regarding demographic information, parenting practices, the child’s gross motor functioning, assistive technology (AT) use, independence with routines, and frequency of routines were obtained from the primary caregiver via an online survey. While no significant relationships between the variables of interest were observed after controlling for the child’s age, gross motor functioning, and …

“No On 26” And @Ms4healthyfams: A Study Of Excellence Theory Public Relations In The Magnolia State, Karelia L. Schmitz

Honors Theses

The purpose of this study is to better understand how public relations campaigns that are designed to influence public policy can incorporate principles from James E. Grunig’s Excellence Theory to improve campaign effectiveness and relevance. In this case study of the Mississippians for Healthy Families campaign in opposition to Mississippi Proposition 26, social media distributed was viewed to analyze its content messages and practices. The study’s research question was designed to understand communication methods used by Mississippians for Healthy Families through the “No on 26” campaign, and the question was examined through a content analysis of materials collected from MS4HealthyFamilies …

Carbon And Nitrogen Analysis To Determine Competitive Outcome For Three Species Of Container Mosquitoes, John Lloyd Martin

Honors Theses

It is well documented that intense larval competition exists between species of container mosquitoes. Two of the main genera of mosquitoes found to inhabit containers are Aedes and Culex. This study sought to determine the effects that different detritus treatments and larva ratios would have on carbon and nitrogen content, mass, and survival of larvae of various species. The species used in this experiment were Aedes albopictus, Aedes aegypti and Culex quinquefasciatus. I hypothesized that Ae. albopictus would be more efficient in acquiring nitrogen then the competitor species Ae. aegypti and Cx. quinquefasciatus. Thus, I expected Ae. albopictus to …

Deconstructing The Body: The Exploration Of The Human Mind Through Symbols, Cassandra M. Knudsen

Honors Theses

The writing of fiction is one of the most popular and enjoyable modes of self-expression; not only does it give the writer the freedom to indulge her imagination, but also allows her a particular insight into her own patterns of thought. This form of introspection is especially important to the symbolist, who hopes to convey psychological human truths through the use of symbols. Traditionally, the intentional use of symbolism is frowned upon in fiction writing, as it is seen as distracting from conveying human truth. However, this study hopes to prove through both literary review and the practice of fiction …

Cloning, Expression And Interaction Studies Of The Potential Rubisco Activase Cbbq, Salma A. Dawoud

Honors Theses

Carboxysomes are polyhedral microcompartments found in all cyanobacteria and in many chemoautotrophs. Within their shell they contain the enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase (RubisCO), which fixes CO₂. Downstream of the carboxysome operon there is another gene cluster containing several genes that may enhance carboxysome function. Two of these genes, cbbQ and cbbO, encode potential RubisCO activases. Using recombinant CbbQ and CbbO protein, and RubisCO isolated from carboxysomes the interaction between these proteins was studied. The CbbO and CbbQ proteins were both His tagged, allowing them to be purified with Ni²⁺-NTA column chromatography. Each of these tagged …

Solving The Obesity Problem One Bite At A Time: A Review Of Interventions, Sally Catherine Davis

Honors Theses

Resource limitations contribute to obesity in southern rural populations. An examination of published research provides evidence related to factors that lead to obesity and to related health consequences. Resource limitations in southern rural areas include a lack of access to healthy foods, a lack of safe areas to exercise or fitness equipment, and a lack of funding to promote the hiring of adequate numbers of healthcare workers to implement prevention programs and treat obesity related diseases. An investigation of obesity rates in Mississippi and Louisiana demonstrate that high rates of obesity exist. Through an exploration of published interventions in both …

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 …

Usda Forest Service Perspectives On Forest Management In A Changing Climate, Jamie E. Laatsch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As climate change becomes more problematic for the Forest Service (FS) and other federal land management agencies in the U.S., it has become increasingly important to understand how their employees view climate change and related challenges. This study examined how FS employees in the Intermountain West view forest management in the face of climate change, what barriers and opportunities they see in terms of dealing with climate change, and how different levels of agency management view climate change-related issues differently. This study found that many FS employees believe climate change is an important issue; however, they have not done much …

Beetles, Fungi And Trees: A Story For The Ages? Modeling And Projecting The Multipartite Symbiosis Between The Mountain Pine Beetle, Dendroctonus Ponderosae, And Its Fungal Symbionts, Grosmannia Clavigera And Ophiostoma Montium, Audrey L. Addison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As data collection and modeling improve, ecologists increasingly discover that interspecies dynamics greatly affect the success of individual species. Models accounting for the dynamics of multiple species are becoming more important. In this work, we explore the relationship between mountain pine beetle (MPB, Dendroctonus ponderosae Hopkins) and two mutualistic fungi, Grosmannia clavigera and Ophiostoma montium. These species are involved in a multipartite symbiosis, critical to the survival of MPB, in which each species benefits.

Extensive phenological modeling has been done to determine how temperature affects the timing of life events and cold-weather mortality of MPB. The fungi have also …

Antiviral Activity Of Favipiravir (T-705) Against Lethal Rift Valley Fever Virus Infection In Hamsters, Dionna Scharton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rift Valley fever (RVF) is a severe disease affecting both humans and a number of agriculturally important livestock species. The causative agent, RVF virus (RVFV), is primarily transmitted through mosquito bites, with transmission also occurring by exposure to infectious aerosols and direct contact with infected body fluids such as blood. Presently, there are no licensed vaccines or medicines to prevent or treat severe RVFV infection in humans. Favipiravir (T-705) is a novel compound licensed for the treatment of influenza in Japan and presently in Phase III clinical trials in the US, which has demonstrated favorable activity against an attenuated strain …

Ambient Temperature, Calf Intakes, And Weight Gains On Preweaned Dairy Calves, Sheldon D. Holt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There has been little research conducted on the physiological response of calves to temperatures outside thermal neutrality and its effects on intake and weight gain. The effects of ambient temperature on Holstein dairy calves intakes and weight gain were evaluated over a 12-month period at the Utah State University Caine Dairy.

Ambient temperature was monitored using a weather station located 1.3 kilometers from the dairy. Calf health was monitored daily using the University of Wisconsin-Madison School of Veterinary Medicine scoring criteria. Calves were fed whole milk and free choice calf starter. Weight gain, wither and hip height, starter intake, and …

Mechanical And Physical Properties Of Spider Silk Films Made From Organic And Water-Based Dopes, Chauncey Lewis Tucker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spider silk has become a popular material due to its exceptional mechanical and biocompatibility properties. The project team has developed methods of producing and improving the properties of synthetic spider silk films. Other groups have been able to produce similar films having less than impressive mechanical properties using a toxic solvent. The spider silk team here at Utah State University has developed a new way of processing these films to more than triple their mechanical properties and has created a novel form of spider silk films produced from a water-based liquid, making it less expensive, more environmentally friendly, and more …

Phosphorus Mobility In The Shallow Unconfined Aquifer At Pineview Reservoir, Utah, Christine Rumsey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Significant phosphorus transport is occurring in the groundwater surrounding Pineview Reservoir. A set of investigations was completed to identify factors contributing to phosphorus mobility. Water quality monitoring was conducted to understand groundwater characteristics and phosphorus movement. Several water quality parameters were evaluated to specifically determine whether septic systems influence groundwater quality. Results indicate that septic systems pollute at least two locations in the aquifer around the reservoir. Given this information, it may be necessary to implement advanced septic system treatment options to reduce the amount of phosphorus in groundwater.

Experiments were conducted on two aquifer sediment types to identify factors …

Control Of Grid-Connected Photovoltaic Systems Using Fractional Order Operators, Hadi Malek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This work presents a new peak seeking strategy for maximum power point operation using fractional order operators in the three-phase grid-connected photovoltaic systems. Moreover, fractional order controllers have been implemented in the voltage and current control loops. The simulation results and theoretical analysis indicate that the proposed fractional order control strategy improves the efficiency of the system by reducing the total harmonic distortion of the injected current to the grid and increases the robustness of the system against uncertainties. Additionally, the proposed maximum power point tracking algorithms provide more robustness and faster convergence speed under environmental variations than other maximum …

Gravitational Wave Astrophysics With Compact Binary Systems, Eric Addison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gravitational waves are ripples in the fabric of spacetime that convey information about changing gravitational fields. Large-scale detection projects are currently in operation, and more advanced detectors are being designed and built. Though we have yet to make a direct detection of a gravitational wave signal, upgrades to current detectors are expected to bring the first detections within the next year or two.

Gravitational waves will bring us information about astrophysical phenomena that is complementary to the information gained from photon-based observations (e.g., telescopes and radio receivers). One of the primary sources of gravitational waves are binary systems: two massive …

The Functional Role Of Cd36 Involved In Fatty Acid Transduction, Han Xu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As one of the most epidemic health concerns in the world, obesity has become a widespread health issue especially for the developed world. It is related to various health conditions including heart disease, type 2 diabetes and certain types of cancer. It is also quite costly. In United States alone, the medical cost of obesity in 2008 was estimated to be $147 billion. Many underlying mechanisms of obesity have been studied in the past few decades. However, the most prevalent cause appears to be simply an imbalance of energy intake and expenditure, resulting in the accumulation of body fat. On …

The Role Of Trpm5 In Dietary Fat Preference, Intake, And Body Composition, Dulce M. Minaya

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

We recently showed a critical role of Trpm5 in the transduction pathway for long chain polyunsaturated fatty acids. In the present study, I have begun to investigate dietary fat preference and the propensity to develop dietary-induced obesity in Trpm5^-/- mice. My preliminary data shows that in male mice placed on a high fat diet, Trpm5^-/- mice did not enhance their caloric intake as observed in wild type mice. Most surprisingly, however, was that I did not observe the same differences in between female mice, which posits a potential gender effect of this pathway on dietary fat intake. Also, …

Assessing Changes In Waterfowl Population And Community Dynamics, Beth E. Ross

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studying long-term ecological studies can help ecologists understand what causes populations and communities of wildlife to change. Understanding these causes can help guide conservation efforts. Additionally, results from long-term datasets allow ecologists to predict how populations may shift with global change. Ecologists can then determine necessary management action to maintain sustainable populations in the future. However, there can be a large amount of “noise” in a long-term dataset. If ecologists fail to account for this noise, they may make incorrect management decisions. For example, samples taken in two nearby locations will likely be more similar than samples taken from two …

Producing An Ovine Model Of Cystic Fibrosis, Kira Perry Morgado

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cystic Fibrosis (CF) is an autosomal recessive disease that significantly affects quality of life and lifespan. There are currently no effective animal models of CF that mimic the human disease state. This prevents the development of pharmaceutical treatments for patients. Sheep have been considered for a useful animal model because of their size, life expectancy, and similarities in their anatomy and physiology. In order to generate a sheep transgenic model to study CF we have produced two Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene targeting DNA vectors containing large regions of homology to the CFTR gene in sheep. One of …

American Bison Ecology And Bison-Cattle Interactions In An Isolated Montane Environment, Dustin H. Ranglack

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As bison are considered to be ecologically extinct, and negative interactions between bison and cattle are perceived to limit bison restoration and cattle production, I designed a series of studies to test for potential competition between bison (Bison bison) and cattle (Bos taurus) for forage on the Henry Mountains in southern Utah. These studies provide insight into key information gaps previously identified by the Utah Division of Wildlife Resources (UDWR), Bureau of Land Management, and the local grazing association. The results indicate that bison and cattle are not strong competitors for forage on the Henry Mountains. …

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 …

Impact Of Beaver Ponds On Stream Temperature And On Solar Radiation Penetration In Water, Camilla J. Snow

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Beaver dams alter streams characteristics in a way that promotes the diversity of aquatic species and provides a wide distribution of temperatures within beaver ponds. In order to quantify the spatial distribution of these temperatures, a process-based temperature model was developed for a beaver pond in Northern Utah. This model provided insight into the processes and characteristics that are driving these temperatures. Solar radiation is one of these processes that is often the primary driver of stream temperature. There is a need to develop methods to measure the fate of solar radiation within the water to better represent solar radiation …

Evaluating Process- And Constraint-Based Approaches For Modeling Macroecological Patterns, Xiao Xiao

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Macroecological patterns, such as the highly uneven distribution of individuals among species and the monotonic increase of species richness with area, exist across ecological systems despite major differences in the biology of different species and locations. These patterns capture the general structure of ecological communities, and allow relatively accurate predictions to be made with limited information for under-studied systems. This is particularly important given ongoing climate change and loss of biodiversity. Understanding the mechanisms behind these patterns has both scientific and practical merits.

I explore two conceptually different approaches that have been proposed as explanations for ecological patterns – the …

Climate Forcings On Groundwater Variations In Utah And The Great Basin, Kirsti A. Hakala

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Groundwater levels over northern Utah have undergone a declining trend since the 1960’s. This trend has made apparent the need to understand the relationship between climate and groundwater resources. Such necessary information is already in dire need in places such as California. At the close of 2013, California had experienced its driest year in recorded history, with severe drought continuing for the foreseeable future. Utah is the second driest state in the U.S., and therefore has been paying close attention to California’s current water crises. Water resource projections may prove to be one of the most vital pieces of information …

Distribution And Drivers Of A Widespread, Invasive Wetland Grass, Phragmites Australis, In Great Salt Lake Wetlands, Arin Lexine Long

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Non-native invasive plant species can often have negative effects on native ecosystems, such as altered nutrient cycling, decreased habitat for wildlife, and outcompeting native plants. Around the Great Salt Lake (GSL), Utah, the invasive wetland grass Phragmites australis has become abundant in wetlands around the lake. Phragmites is replacing many native wetland plants provide important waterfowl habitat around the GSL. For successful management of Phragmites in GSL wetlands, it is important to know the current distribution of Phragmites, as well as areas that might be vulnerable to future invasion by Phragmites. To do this, we used multispectral aerial …

Ringtail Distribution, Dermatoglyphics, And Diet In Zion National Park, Utah, Adrian Argie Roadman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Current scientific knowledge of the ringtail (Bassariscus astutus) is limited, thus impeding appropriate management decisions. Ringtails in Zion National Park, Utah, are rarely seen, but are involved in increasing occurrences of negative interactions with park visitors and employees such as food theft and denning in buildings, interactions which are harmful to both parties. To manage this conflict, an update to the general knowledge about the status of the population is required as the only previous study on ringtails in this area was conducted in the 1960s. Using noninvasive techniques provides dependable large-scale population information. I used two noninvasive detection methods …

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 …