Digital Commons Network^™

Enhancing The Production And Sustainability Of Pasture-Fed Beef Using Non-Traditional Legume Forages, Andrea I. Bolletta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Despite the increasing worldwide demand for beef as a protein source, consumers are concerned about the sustainability of ruminant production systems. Their main concerns are animal welfare for feedlot-fed animals, greenhouse gas (GHG) emissions, global warming and worker safety. Traditional feedlot-based beef production systems have been associated with locally greater levels of soil, water and air contamination, as well as the overuse of antibiotics and growth hormones. The use of legume pastures such as cicer milkvetch (CMV) and birdsfoot trefoil (BFT), which fix their own nitrogen (N) and often contain beneficial secondary compounds such as tannins and provide for rapid …

The Effects Of Milk Phospholipids On Functional Properties Of Anhydrous Milk Fat And Oil Structured Gel Systems, Zachary Cooper

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Lecithin is an ingredient commonly used in foods composed of high concentration of phospholipids. Phospholipids are a type of fat that can mix with both water and oil. In the current food industry, most lecithins come from sunflower, egg, and soybean sources. An additional source of phospholipids can be the waste streams from the dairy industry, such as the whey protein and butter making processes, since these contain a high concentration of phospholipids. Dairy phospholipids have been isolated in the past, but their traits as a functional ingredient are still unknown. In addition, most isolated dairy phospholipids still contain protein, …

Rumination And Quality Of Life Among Northern Plains Indians, Devon S. Isaacs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Native Americans (NAs) share unique risk factors for poor mental health. In response, mental health providers must address barriers to treatment while making the most of low resource situations. One way to increase usefulness of treatment is to address the mechanisms underlying multiple mental health disorders. Rumination is a style of thinking marked by repeated thoughts about distress and is well-recognized as a diagnostic factor for underlying disorders in the general population. Secondary data from the Mood Disorder Assessment Validation with Northern Plains Indians (NPI) pilot study was used to examine the relationship between rumination and anxiety, depression, and substance …

Interactions Between Water-Stress And Maize Resistance To Spider Mites With Varied Host Specialization, Gunbharpur S. Gill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spider mites are well-documented pests of many agricultural crops including cereals such as maize. In hot and dry conditions, when crop plants are under water-stress, spider mite populations can rapidly increase within weeks and can cause severe yield losses. One approach to manage pests, such as spider mites, is through the development and selection of plants that can resist pests. Screening of maize lines has provided evidence of spider mite resistance; however, it is unclear how plant water-stress may affect the ability of maize to sustain spider mite resistance. In addition, it is important to understand how plants respond to …

College Prescription Opioid Misuse: An Exploration Of Social Learning, Social Control, And Strain Theories, Julie Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Prescription opioids, when used as medically intended, can be effective in pain management. However, the consequences and costs of widespread misuse of prescription opioids in the United States are cause for concern. Prescription opioids are related to increased risk of death and injury. Young adults, between the ages of 18 and 25, have the highest rates of misuse nationally and within this age group, college students may be particularly at risk. In order to effectively curb the growing misuse of prescription opioids within college populations, we must have a better understanding of the factors that potentially lead to misuse.

This …

Development Of A High-Resolution Land Cover Dataset To Support Integrated Water Resources Planning And Management In Northern Utah, Ellie Irene Leydsman Mcginty

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Integrated planning and management approaches, including bioregional planning and integrated water resources planning, are comprehensive strategies that strive to balance the sustainability of natural resources and the integrity of ecosystem processes with human development and activities. Implementation of integrated plans and programs remains complicated. However, geospatial technologies, such as geographic information systems and remote sensing, can significantly enhance planning and management processes.

Through a United States Environmental Protection Agency Region 8 Wetland Program Development Grant, a high-resolution land cover dataset, with a primary emphasis on mapping and quantifying impervious surfaces, was developed for three watershed sub-basins in northern Utah - …

Early Adolescent Gifted And Talented Students And Their Experience With Bullying, William T. Allen Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bullying, in all its forms (e.g., verbal, physical, cyber, social ostracism), is a continual problem in public schools. It exacerbates the painfully high suicide rate among early adolescent students, especially in the western U.S., with some evidence showing distinctions within the academically advanced gifted and talented (GT) cohort. Research shows GT students (GTs) are bullied at nearly double the rate of the mainstream population. Yet, quantitative statistics indicate GTs and non-GTs suffer comparable rates of trauma internalization, suicide ideation, and suicide. Some quantitative differences do start to appear with further personality distinctions. This points to a possibility that qualitative dissimilarities …

Exploring The Connection Between Acid Exposure And Virulence In Listeria Monocytogenes, Minghao Li

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Listeria monocytogenes is a gram-positive food-borne pathogen that is widely dispersed in the environment and can cause listeriosis with high fatality rates when consumed in contaminated food products. They are capable of growing over a wide range condition. Listeria is also able to tolerate adverse conditions which allows the bacterium to survive in unfavorable environments. The ubiquitous nature of L. monocytogenes makes it difficult to eliminate from food systems. One major problem in the food industry is the survival of L. monocytogenes under sublethal low pH-environment since organic acids are widely used as food decontaminants. Prior research has suggested that …

Protecting Crops From Abiotic Stress: Copper Oxide Nanoparticle Effects On Wheat And A Beneficial Rhizobacterium, Matthew Potter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nanoparticles (NPs) are defined as particles less than 100 nm in at least one dimension. CuO NPs have possible applications in agriculture as micronutrient sources, pesticides, and enhancers of crop stress tolerance. Here, three aspects of CuO NP agricultural applications are studied: 1) the potential of CuO NPs to prevent wheat lodging-when crops irreversibly fall over; 2) CuO NP-induced drought tolerance in wheat seedlings; and 3) the effects of CuO NPs on outer membrane vesicle (OMV) production by Pseudomonas chlororaphis O6 (PcO6), a plant-health promoting bacterium.

Wheat grown 7 d exposed to CuO NPs in the growth matrix …

Try The Wine: Food As An Expression Of Cultural Identity In Roman Britain, Molly Reininger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research surrounding cultural identity and food customs throughout history are published often, but any research that attempts to combine the two are often based in more recent history. Few combinations of the two are available, and fewer explore the implications within ancient colonization and expansion.

The research for this thesis was conducted with three viewpoints in mind: the colonization of Britannia from Romans within the new colony, the colonization from the native Briton's perspective, and the Roman citizens within Britannia at the end of Rome's military involvement with the colony. This method was chosen because in the early years of …

Harmful Algal Blooms: Dominance In Lakes And Risk For Cyanotoxin Exposure In Food Crops, Austin D. Bartos

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Climate change and human activities are promoting the dominance of a photosynthetic family of aquatic bacteria, cyanobacteria. Blooms of cyanobacteria are not only a visual nuisance but can produce a variety of cyanotoxins than can harm the liver, skin, and nervous system of animals and humans. We analyzed lakes in the contiguous United States and found that between 2007 and 2012, the number of lakes that produced measurable quantities of cyanotoxins increased from 33% to 45%. Nitrogen and phosphorus pollution were the main drivers of cyanobacteria blooms and toxin production between these years. Many of these lakes and reservoirs are …

National Survey Of Professional Development On Writing Compliant Transition Individualized Education Programs, M. Faith Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A national survey of special education administrators was conducted on current special education teacher trainings, the internal monitoring processes on transition IEPs, and the effect training has on compliance with federal law. In addition, this student researcher examined training and internal monitoring systems to determine if there were any similarities or differences between rural, suburban, and metropolitan school districts. An explanatory sequential mixed methods design gathered survey data from 147 special education administrators from across the U.S. and conducted interviews with 14 participants representing rural, suburban, and metropolitan school districts. When combining survey and interviews data, the results showed that …

Teaching Appropriate Feedback Reception Skills Using Computer-Based Training, Seth G. Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Feedback is a commonly used intervention to address performance issues in a number of settings. Most research on feedback has focused on manipulating parameters surrounding the delivery of feedback. However, the interaction between those delivering the feedback and a feedback recipient may also influence the impact of performance feedback. The current study investigated the efficacy of training individuals to receive feedback in an appropriate manner using a computer-based training format. Following computer-based training, participants exhibited increases in accuracy of appropriate feedback behaviors when compared to baseline. Participants also demonstrated slight increases in performance on primary job tasks. This study extends …

Supporting Adolescent Mental Health Within School Culture And Curricula: Inviting Adolescents To Utah's Mental Health Conversation, Diana West

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah is facing a mental health crisis. Between 2011 and 2017, teen suicides nearly tripled in Utah and had become the leading cause of death for children ages 10-17. Educators and policymakers are scrambling to provide students with mental health supports in schools, but an incomplete understanding of the challenges that students face can make it difficult to meet their needs. Each year state agencies ratchet up awareness, funding, and the determination to support mental health initiatives, but each year adolescent mental health in Utah becomes more precarious. The purpose of this study is to change the conversation by inviting …

Exploring In Vivo And In Vitro Regulation Of The Shigella Type Three Secterion System Atpase Spa47, Heather B. Case

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Diarrheal disease is caused by a diverse group of enteric pathogens and is one of the leading causes of preventable deaths worldwide. Some of the most common causes of diarrheal disease are bacterial pathogens such as Salmonella, E. coli, Cholera, and Shigella. Many bacterial enteric pathogens use a type three secretion system (T3SS) to cause infection. The T3SS uses a needle and syringe like apparatus that allows the bacteria to inject proteins into the host cell to cause infection. Striking similarities in T3SSs from all pathogens that utilize them makes the T3SS an attractive target for …

Harvest Efficiency Of Forage Grazed By Cattle And The Effect Of Pinyon And Juniper Treatments On Vegetation Cover On The Grand Staircase Escalante National Monument, Ruger P. Carter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Grand Staircase Escalante National Monument (GSENM), located in central south Utah, currently has 76,957 active grazing animal unit months on the monument. Recently, there has been questions whether the harvest and grazing efficiency coefficients developed in the Midwest are applicable to the arid, bunch grass dominated systems of the GSENM. Harvest and grazing efficiency defines the percentage of allocated forage that is being ingested by the animal, and the percentage that is being wasted. Harvest and grazing efficiency coefficients were calculated on the Lower Cattle allotment on the GSENM by taking total forage production and dividing that by expected …

Anthropogenic Influences On Bacterial Assemblages In Stream Biofilms, Elizabeth M. Ogata

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bacteria within biofilms are an essential component of stream ecosystems, influencing the movement of carbon (C), nitrogen (N), and phosphorus (P) in watersheds. To better understand the ecological effects of human activities on stream ecosystems, my research examined how nutrients and pharmaceuticals, common pollutants in streams worldwide, influence bacterial assemblages in stream biofilms. First, I tested how nutrients (N, P, iron) and pharmaceuticals (caffeine, diphenhydramine) influenced biofilm bacterial microbiomes (taxa present in at least 75% of samples of a contaminant treatment). Nutrients allowed taxa known for their ability to thrive in nutrient-rich environments to dominate microbiomes, pharmaceuticals supported a rich …

Impacts Of Tourism On The Ecophysiology Of The Endangered Northern Bahamian Rock Iguana (Cyclura Cychlura), Alison C. Webb

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increased interest in ecotourism over recent years has led to more direct human-animal interactions and a striking concomitant increase in the provisioning of non-natural food, that may have unintended consequences for the wildlife involved. The critically endangered Northern Bahamian Rock Iguana provides a valuable model to address the potential impact of food provisioning on health as there are populations that represent a graded variation in human presence, with sites experiencing high, low, or no tourism. To assess the potential impacts of tourism on iguana physiology I first reviewed the relevant literature on iguana physiology and then performed three investigations focusing …

Cultural And Contextual Influences On Mental Health, Stigma, And Substance Use Among Mena U.S. College Students, Molly Mechammil

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The aim of this dissertation was to investigate whether certain cultural and contextual factors influence Middle Eastern/North African (MENA) college students' mental health, alcohol/marijuana use, and experiences with mental health stigma and help seeking. Research with MENA college students is very limited, which leaves mental health providers with limited information on how to best support MENAs. MENAs report high rates of discrimination, and other research shows that many they may use religion as a way to cope with stressors such as discrimination. I examined whether religious coping might buffer the effects of discrimination on mental health outcomes. I also considered …

Kudos And K.O.M.'S: The Effect Of Strava Use On Evaluations Of Social And Managerial Conditions, Perceptions Of Ecological Impacts, And Mountain Bike Spatial Behavior, Noah E. Creany

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Smartphone based self-tracking fitness applications (apps) like Strava are increasingly becoming a part of recreation experiences in parks and protected areas (PPAs). Recreation research has employed smartphone GPS tracking (SGT) and volunteered geographic information (VGI) to study visitor behavior in PPAs, but little is understood about how smartphones or fitness apps affect visitor perceptions and behavior during their experience.

The first chapter of this thesis is a literature review of recreation survey and behavior research, social-psychology and technology use theory, gamification, and mountain bike social science and recreation-ecology research. The second chapter is formatted for submission to the Journal of …

Effect Of Long Pasteurization Run Times On Bacterial Numbers In Milk, Brynli Tattersall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This project was funded by the Western Dairy Center to understand how long a milk pasteurizer can be operated before increases in bacterial numbers are observed in the pasteurized milk. While pasteurization kills pathogenic bacteria there are some non-pathogenic bacteria that can survive and have the ability to become attached to the surfaces in the cooling sections of the pasteurizer. Some bacteria can also produce spores that survive pasteurization even if the bacterial cells are killed. Temperatures in the cooling section remain in a range suitable for growth of these heat-tolerant bacteria and can allow germination of bacterial spores. While …

A Unique 16u Cubesat Architecture For 1.5m Gsd Commercial Earth Observation, Matthys Cronje, Jacob Mølbach Nissen, Jacu Vos, Eben Grobbelaar, Johan Du Plooy, Søren Pedersen, Leonardo Ghizoni

Small Satellite Conference

Satellite operators frequently use 3U and 6U CubeSats for Earth Observation (EO) applications. These nanosatellites do have a few challenges when addressing the needs of the commercial EO sector:

✔the demand for more spatial, spectral and radiometric detail

✔the long term reliability of the satellite bus, and

✔accuracy of the satellite imagery.

This poster introduces a 16U CubeSat architecture to address these challenges by optimizing the imaging payload to fit in a 12U volume and the satellite bus within a 4U volume.

Preparing Cysat-1: A Look At Iowa State University’S First Cubesat, Matthew E. Nelson, Dae Young Lee, Mackenzie Kilcoin, Luke Gordon, William Brown

Small Satellite Conference

In this paper, an overview of the scientific mission of CySat-1, the derived vehicle requirements, impact on system design, and the educational opportunities presented by these challenges. CySat-1, previously scheduled for launch on the SpaceX-21 and awaiting further details following the COVID-19 pandemic, is a CubeSat designed and built by students at Iowa State University. The primary mission of CySat-1 is to provide hands-on experience to undergraduate students in designing, building, and testing a space system. CySat-1 also hosts a scientific payload, a software-defined radio (SDR) radiometer, to survey soil moisture content on Earth from Low Earth Orbit. This mission …

Magneto: Mapping The Earth’S Magnetic Field At 300 Km Using Cots Sensors, Lizette Villafana, Jessica Yuan, Liam Broadus, Warren Su, Claire Carlton, Ava Norrell, Rahul Rughani, Eugene Park, David Barnhart

Small Satellite Conference

In the nearly two decades that CubeSats have been in significant use, over 800 have been launched, and many more are under construction. They have gained popularity in the industry and are often the choice for most first-time small-satellite missions. The University of Southern California’s (USC) Space Engineering Research Center (SERC) has developed a 1.5U student-built science mission called Magneto. Magneto is USC’s fourth CubeSat mission, and it has the goal of mapping the Earth’s magnetic field in Low-Earth Orbit (LEO) using Commercial Off-The-Shelf (COTS) hardware, to determine the viability of using COTS sensors to decrease the mission cost by …

The Development And Application Of The F Prime Magicdraw Plug-In User Handbook, Trent Rich

Small Satellite Conference

F Prime is an open-source framework developed at the National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory (JPL) to facilitate software development for small-scale flight systems. In addition to providing a suite of tools for software development, F Prime enables the modeling and generation of flight software through a MagicDraw plug-in. Systems modeling methodologies, such as Model Based Systems Engineering (MBSE), leverage modeling languages, such as SysML, and tools, such as MagicDraw, to capture and maintain system design. However, these methodologies typically neglect software, capturing only the system hardware and behavior. For CubeSat projects, it is desired to develop …

On-Orbit Performance Of The Bcp-100 Green Propellant Infusion Mission, Brian Marotta, Christopher Mclean, Brad Porter

Small Satellite Conference

The Green Propellant Infusion Mission (GPIM) spacecraft was launched in June of 2019 as a secondary payload on the Air Force’s STP-2 Falcon Heavy launch vehicle. GPIM is a BCP-100, a line of ESPA class spacecraft designed by Ball. The BCP-100 was designed around the capability to support multiple payloads on a single platform, and be able to fly in a wide range of orbits without the need to reconfigure the spacecraft in any way. Proving the flexibility and multi-role capability of the BCP-100 design, there are three secondary payloads on GPIM. In addition to the green propellant payload, iMESA, …

Nasa Spacecube Intelligent Multi-Purpose System For Enabling Remote Sensing, Communication, And Navigation In Mission Architectures, Cody Brewer, Nicholas Franconi, Robin Ripley, Alessandro Geist, Travis Wise, Sebastian Sabogal, Gary Crum, Sabrena Heyward, Christopher Wilson

Small Satellite Conference

New, innovative CubeSat mission concepts demand modern capabilities such as artificial intelligence and autonomy, constellation coordination, fault mitigation, and robotic servicing – all of which require vastly more processing resources than legacy systems are capable of providing. Enabling these domains within a scalable, configurable processing architecture is advantageous because it also allows for the flexibility to address varying mission roles, such as a command and data-handling system, a high-performance application processor extension, a guidance and navigation solution, or an instrument/sensor interface. This paper describes the NASA SpaceCube Intelligent Multi-Purpose System (IMPS), which allows mission developers to mix-and-match 1U (10 cm …

Testing Of A Green Monopropellant Integrated Propulsion System, Joe Cardin, Tate Schappell, Chris Day

Small Satellite Conference

VACCO has application-engineered a green monopropellant Integrated Propulsion System (IPS) specifically designed for ESPA-class small satellites. The Integrated Propulsion System is a smart propulsion system with propellant storage, pressurant storage, feed system, controller, software and four flight-proven 1N non-toxic thrusters in a compact bolt-on package. This paper documents Protoflight testing of the first flight system against specified requirements.

Protoflight testing of the Integrated Propulsion Systems combines both acceptance testing that screens for workmanship and Protoflight and qualification testing that verifies the design. As with conventional propulsion systems, Integrated Propulsion Systems are not hot fire tested at the system level. The …

Diet, Nutrition, And Substance Use Disorder, Mateja R. Savoie-Roskos, Ashley Yaugher, Alise Williams Condie, Gabriela Murza, Maren Wright Voss, Kandice Atisme

All Current Publications

Consuming a healthy diet can benefit everyone—especially individuals with substance use disorder (SUD), a disorder that occurs when frequent use of drugs or alcohol causes impairment, health issues, and difficulties with managing daily responsibilities (Substance Abuse and Mental Health Services Administration [SAMHSA], 2020). Although often overlooked, nutrition can play a key role in the treatment and recovery process for individuals with SUD, and should be included as part of a holistic approach toward recovery. In this fact sheet we will review how diet and nutrition are impacted during an active addiction, and the influence nutrition can have on treatment and …

“To Ask Freedom For Women”: The Night Of Terror And Public Memory, Candi Carter Olsen

Journalism and Communication Faculty Publications

On the night of November 14, 1917, 31 suffragists and members of the National Woman’s Party (“NWP”) were taken to Occoquan Workhouse in Virginia and tortured and beaten. This so-called “Night of Terror” captured national headlines at the time and has been memorialized through digital sites today. This article examines versions of the Night of Terror from the NWP’s official newspaper, The Suffragist, national newspapers of the day gathered from the Chronicling America database, and modern digital memorials of the event to understand the ways that the mediated telling of events create the fractured popular memories that are retold …