Digital Commons Network^™

Bigapp: A User-Friendly Genomic Tool Kit Identified Quantitative Trait Loci For Creeping Rootedness In Alfalfa (Medicago Sativa L.), Alexander M. Sandercock, Michael D. Peel, Cristiane H. Taniguti, Josué Chinchilla-Vargas, Shufen Chen, Manoj Sapkota, Meng Lin, Dongyan Zhao, Arlyn J. Ackerman, Bhoja R. Basnet, Craig T. Beil, Moira J. Sheehan

Plants, Soils and Climate Student Research

Alfalfa (Medicago sativa L.) is a globally vital forage crop valued for its perennial growth and multiple annual harvests. A breeding effort is underway to improve the crop for productivity and persistence against biotic and abiotic stresses using “creeping rootedness,” a trait where plants exhibit horizontal root growth, similar to rhizomes, with increased vegetative ground surface area. In this study, we genotyped a breeding population of 648 alfalfa lines segregating for creeping rootedness using the 3K DArTag marker panel to identify trait-associated genomic loci and evaluate the feasibility of genomic prediction to accelerate breeding cycles. Using genome-wide association studies …

Dynamic Microbiome Responses To Structurally Diverse Anthocyanin-Rich Foods In A Western Diet Context, Mohammed F. Almatani, Giovanni Rompato, Eliza C. Stewart, Marcus Hayden, Jeremy Case, Samuel Rice, Korry J. Hintze, Abby D. Benninghoff

Animal, Dairy, and Veterinary Science Student Research

Background/Objectives: Anthocyanin (ACN)-rich foods are known to influence the gut microbiota composition, but the temporal dynamics and structural specificity of these effects remain poorly understood. This study investigated how distinct ACN-rich fruit supplements impact the gut microbiome over time in the context of a Western-style diet. We hypothesized that ACN-induced microbial shifts would occur rapidly, differ by ACN source, and require continued intake to persist. Methods: C57BL/6J mice were fed the total Western diet (TWD) supplemented with freeze-dried powders from bilberry (BB), tart cherry (TC), chokeberry (CB), elderberry (EB), black currant (BC), or black raspberry (BRB) for 0, 1, 3, …

On Programmatic Aspects Of The Universality, Parameter, And Recursion Theorems Of Classical Computability, Vladimir A. Kulyukin

Computer Science Faculty and Staff Publications

The Universality, Parameter, and Recursion Theorems are three foundational results of classical computability theory. We show how these theorems can be programmatically illustrated and partially validated in Lisp. Our programs can be used as supplementary materials to texts on theoretical computer science, mathematical logic, or metamathematics.

Influence Of Age At Harvest And Packaging Conditions On Color Stability Of Bovine Psoas Major Muscle, Xiao Lu, Xin Luo, Sulaiman K. Matarneh

Nutrition, Dietetics, and Food Science Student Research

This study investigated the effect of cattle age on the color stability of Psoas major steaks under different packaging conditions, including polyvinyl chloride (PVC) film packaging, high-oxygen-modified atmosphere packaging (HiOx-MAP), and carbon monoxide modified atmosphere packaging (CO-MAP), over a 14-day storage period. Steaks from old cows had a greater myoglobin content than those from young animals (p < 0.05), resulting in a darker beef color. Regardless of animal age, steaks in PVC and HiOx-MAP exhibited poor color stability during storage, as evidenced by the low color intensity and high surface metmyoglobin (MetMb; p < 0.05). These samples also exhibited a reduced MetMb reducing activity (MRA) and oxygen consumption rate (OCR) and higher 2-thiobarbituric acid reactive substance (TBARS) levels, with these effects being evident in steaks from mature cows. In contrast, steaks stored in CO-MAP had greater redness, MRA, and OCR, along with lower surface MetMb and TBARS levels (p < 0.05), contributing to the limited discoloration of steaks from both age groups. These findings suggest that while both harvest age and packaging affect the shelf stability of bovine steaks, packaging plays a more significant role. CO-MAP proved to be more effective than aerobic packaging and may mitigate age-related differences in color stability.

Voting And Civic Engagement Among Utah Women: A 2025 Update, Corinne Clarkson, Susan R. Madsen, Kolene Anderson

Marketing and Strategy Faculty Publications

In 2016, the Utah Women & Leadership Project (UWLP) released a research snapshot called “Voting and Civic Engagement Among Utah Women.”¹ At the time, despite having a strong history of women’s political and civic involvement, Utah had fallen to the bottom of national rankings in terms of women’s political participation.² In 2019 and 2021, UWLP released updates of this report, which showed some improvement in voter participation rates for both the United States (US) and for Utah women. Since 2016, the level of political participation among women in Utah and the US has grown, and civic engagement—a critical …

Morphological And Physiological Responses Of Cymbopogon Citratus And Pennisetum Alopecuroides To Saline Water Irrigation, Haifeng Xing, Asmita Paudel, Julie Hershkowitz, Youping Sun

Plants, Soils, and Climate Faculty Publications

Reclaimed water provides a sustainable and economical alternative for landscape irrigation, but its elevated salinity can negatively impact sensitive plant species. This study evaluated the salinity tolerance of two widely used ornamental grasses, Cymbopogon citratus (lemon grass) and Pennisetum alopecuroides (fountain grass), under three electrical conductivity (EC) levels: 1.2 (control), 5.0, and 10.0 dS·m⁻¹. Visual assessments over 62 days showed that both species maintained an acceptable appearance under saline conditions. C. citratus exhibited no foliar damage, with visual scores above 4.6 even at 10.0 dS·m⁻¹, whereas P. alopecuroides showed slight leaf injury but retained a score …

Revised Unsteady Drag Force And Its Impact On Particle Dynamics At High Reynolds Numbers, Ahmad Talaei, Timothy J. Garrett

Physics Student Research

The accurate modeling of particle motion in viscous fluids at high Reynolds numbers remains a fundamental challenge, particularly under unsteady flow conditions where nonlinear effects dominate. This study introduces a revised unsteady drag formulation, extending its applicability beyond previous studies. By integrating classical solutions of the Navier–Stokes equations, the new formulation overcomes the limitations of the Maxey–Riley–Gatignol (MRG) equation, addressing non-physical memory effects associated with Basset drag and extending its applicability to higher Reynolds numbers.

Through experimental comparisons and direct numerical simulations (DNS), the revised equation of motion is compared to the MRG equation, both during steady-state conditions and non-equilibrium …

Microstructure-Based Homogenization Of Elastic Properties In Additively Manufactured Thermoplastic Composites, Md Tareq Hassan, Samiul Alam, Juhyeong Lee

Mechanical and Aerospace Engineering Student Publications and Presentations

Additive manufacturing (AM) of fiber-reinforced thermoplastic composites has emerged as a promising technology, enabling the fabrication of lightweight, complex geometries with reduced material waste and lower production costs. Among various AM methods, composites-based additive manufacturing (CBAM) has gained attention for its rapid prototyping and producing parts with enhanced mechanical properties. Regardless of these benefits, CBAM-printed composites may inherently possess a certain level of defects introduced during the manufacturing process, such as voids, microcracks, and non-uniform porosity. To address these challenges, understanding the relationship between microstructural characteristics and effective mechanical properties is critical. Micro-computed tomography (μCT) is a powerful technique for …

An Adaptation Of Nonlinear Aerodynamic Models For Non-Traditional Control Effectors, Christian R. Bolander, Douglas F. Hunsaker

Engineering Education Faculty Publications

This paper presents the development of a novel aerodynamic model tailored for the Bio-Inspired Rotating Empennage (BIRE), a non-traditional fixed-wing aircraft empennage inspired by avian flight. The BIRE replaces the conventional vertical stabilizer with an extra degree of freedom for the horizontal stabilizer, which is allowed to rotate about the body-fixed x axis. This empennage is similar to the tail of a bird, and allows control of both longitudinal and lateral moments. However, such a design introduces complex nonlinear longitudinal and lateral aerodynamic interactions, not typically accounted for in most fixed-wing aircraft aerodynamic models below stall. This work presents a …

Reconstruction Of Cad Models Into Analysis-Ready Single Trimmed Surfaces With Aerospace Applications, Rebecca Rasmussen, Royce Pablo Harline, Kendrick Shepherd

Utah Space Grant Consortium

Classical methods by which computer-aided design (CAD) geometries are represented for both design and analysis involve meshing. However, the current process of converting a CAD model into an analysis-suitable surface mesh takes a significant amount of time and labor [23, 4, 18], results in a faceted representation of the original smooth geometry, and generates representations that are prohibitively expensive for use in high-order explicit dynamics computations [35, 9].

This research focuses on accurately and efficiently rebuilding given CAD surfaces or meshes, such as shell-like components of aeronautical structures or automotive vehicles, into smooth, single trimmed spline surface approximations (rather than …

Vocs In Heat-Stressed Poplar-Mycorrhizae Systems, Luis Valdez, Peter Doust, Kastin Ricord

Utah Space Grant Consortium

Plants release volatile organic compounds (VOCs) as gases into the atmosphere, including small molecules like alcohols, ketones, and terpenes, as well as products of the lipoxygenase (LOX) and the mevalonate (MVP) metabolic pathways.

Multiple Wavepacket Decomposition Of F404 Engine Military Jet Noise, Tyce W. Olaveson, Kent L. Glee

Utah Space Grant Consortium

Jet noise sources are challenging to measure directly due to the extreme environment. Inverse methods, such as acoustic beamforming, using data collected near these sources can be used to construct equivalent source models that accurately describe the acoustic radiation. However, generating these models for a complex source can require thousands of parameters for a complete description. To address this challenge, a multiple wavepacket decomposition is introduced, reducing the source model into a set of analytic wavepackets, which recreate the full-rank model. This paper provides an overview of the decomposition procedure and applies it to acoustic data collected near a T-7A-installed …

A Comparison Of Surrogate Modeling Techniques For Predicting Radial Turbomachinery Flow Fields, Chase Oliphant

Utah Space Grant Consortium

Radial pumps and compressors are used in various engineering applications, including rocket turbopumps, automotive turbochargers, refrigeration systems, etc. Several different physical effects, including viscous losses, flow separation, compressibility, and rotational dynamics, dominate the flow in a radial impeller. These effects make predicting the flow field in a radial impeller very difficult, requiring computationally expensive CFD. However, a majority of an individual flow field calculated using CFD is often not pertinent to a designer, who only requires information at certain positions within the flow field. This often results in most of the simulation data generated being unused. Accurately predicting the flow …

Analysis Ready Aerospace Wing Assembly Reconstruction Using Parameterization, Brian Shawcroft, Kendrick Shepherd

Utah Space Grant Consortium

Accurate analysis of structures in the design process are often labor intensive and computationally expensive. Isogeometric analysis (IGA) provides potential to better connect the design through analysis process and converge to accurate results more quickly. Here, methods are proposed to help in the goal of automating the process of converting design geometry to an analysis suitable model for IGA. This is done by using tools previously built in combination with a motorcycle graph algorithm to extract quadrilateral layouts of the intended geometry. This method will be demonstrated by reconstructing and analyzing an airplane structure.

“Gang, We Have A Mystery On Our Hands!”: A Folkloristic Approach To Conspiracy Thinking In Scooby-Doo! Mystery Incorporated, Sydney K. Brooks

All Graduate Reports and Creative Projects, Fall 2023 to Present

In this thesis I examined how the 2010 children’s television show Scooby-Doo! Mystery Incorporated both utilizes and critiques conspiracy, embedded within its mystery-solving structure. Through a close analysis of the members of the gang—Fred, Daphne, Velma, Shaggy, and Scooby-Doo—I broke down their individual behaviors, interactions, and contributions to conspiratorial belief. I then transitioned into a case study of the episode “Where Stalks the Scarebear,” showcasing its connection to larger real-world conspiracy narratives, particularly those related to corporate and environmental cover-ups. Finally, I examined the show as a complete narrative, reflecting on its complex, serial exploration of conspiracy through the framework …

Tax Increment Financing: A History And Analysis Of Its Success And Failure, Justin Cederlof

All Graduate Reports and Creative Projects, Fall 2023 to Present

Tax increment financing (TIF) is used by cities and towns to subsidize projects within their jurisdictions. The name derives from the growth in the tax base that a (re)development is theoretically responsible for. The increase in tax revenue is directed to funds to pay for the project. TIF is used in 49 U.S. states and each state has unique legislation for its use of it, though there are large similarities between states on how it’s implemented. Research suggests mixed results with whether or not the increase in the tax base is enough to pay off how much money went toward …

How Does Fiscal Decentralization Shape Corruption?, Sharandy G. Appiah

All Graduate Reports and Creative Projects, Fall 2023 to Present

In this paper, I offer a comprehensive review of the impact of fiscal decentralization on corruption. Corruption has been a big hindrance to development, it undermines the inflow of foreign direct investment and even affects education. The literature on fiscal decentralization and corruption has conventionally argued that fiscal autonomy for local officials lowers corruption whereas most recent papers have found that fiscal decentralization increases corruption. I identify four possible pathways through which fiscal decentralization affects corruption and address possible reasons for the difference in findings in the literature. Understanding the mechanisms through which fiscal decentralization shapes corruption at the national …

Gravity Wave Breaking Over Northern Utah With An Advanced Mesospheric Temperature Mapper And Sodium Lidar, Eric Davis

All Graduate Reports and Creative Projects, Fall 2023 to Present

Considerable progress has been made in recent decades in the understanding of gravity wave (GW) dynamics. However, there remain important aspects and effects that are poorly understood. In particular, the coupling and deposition of their energy and momentum into the mesosphere lower thermosphere (MLT) region and the interaction and instability dynamics that are directly associated with GW breaking. Using an Advanced Mesosphere Temperature Mapper (AMTM) several strong wave breaking events were observed in the summer of 2015 at USU’s BLO research station. These events have exhibited high momentum fluxes and associated strong wave breaking, prompting detailed data analyses. Rossby waves, …

"Death Is The Fifth [Season], And Master Of All": Necropolitical Violence And/As Environmental Violence In The Fifth Season, Mason T. Goodrich

All Graduate Reports and Creative Projects, Fall 2023 to Present

While many scholars have already described N.K. Jemisin’s Hugo Award-winning speculative novel The Fifth Season as one that highlights intersections between race, settler-colonialism, neoliberalism, and, most frequently, climate change, I apply a necropolitical lens to The Fifth Season in order evaluate a relationship that exists between systemic violence and environmental degradation. The Fifth Season depicts a socially inscribed relationship between an othered race of humans, called orogenes, and the land, anthropomorphized as “Father” Earth. Orogenes have a paradoxical social status: they are simultaneously feared and revered for their ability to control the Earth. This paradox is the impetus for many …

Reflections On Teaching Language And Culture In The French Dual Language Immersion Classroom, Aminata Sylla

All Graduate Reports and Creative Projects, Fall 2023 to Present

This portfolio is representative of the author’s work in the Masters in Second Language Teaching (MSLT) program and classroom experience. The reflection paper explores teaching French in the Dual Language Immersion (DLI) and Bridge secondary education context and evaluates specific examples of innovative teaching. The aims of this reflection are twofold: first, to reflect on how the author improved her teaching effectiveness through this experience and through the USU MSLT program; second, to suggest best practices in the French DLI classroom. Both practical and theoretical, the reflection focuses on the author’s own experiences teaching Bridge program intermediate and advanced-proficiency level …

“Floptok Is Not A Trend. It’S A Lifestyle”: Camp, Performativity, And Community Dynamics In An Adolescent Tiktok Subculture, Drake Hansen

All Graduate Reports and Creative Projects, Fall 2023 to Present

Floptok is an online meme-sharing community or subculture that began to take shape in 2021, united by a particular sensibility and set of memetic materials. To outsiders, Floptok is seen as a loud, brash, and often abrasive community whose memes, characterized by low-quality audio and video, often feature “icons”—a range of invented characters and real people—and audio of pop songs heavily edited to feature hypersexual lyrics from the rapper CupcakKe, as well as portions of the 2019 Chinese pop song “Yěhuāxiāng.” This thesis built on scholarship in digital and young people’s folklore in an ethnographic case study of Floptok’s humor …

Dove: An Interdisciplinary Framework For College Composition Instructors, Audrey Hansen

All Graduate Reports and Creative Projects, Fall 2023 to Present

In this thesis, I merged personal narrative and interdisciplinary knowledge to develop a composition pedagogy framework for my fellow college composition instructors by applying an understanding of the psychological theory of attachment styles to our understanding of diversity and behavior in the classroom. I presented a personal narrative describing how I discovered a connection between attachment theory, behavior psychology, and college composition classrooms. The framework developed guides instructors step-by-step how to apply interdisciplinary psychology knowledge to the field of composition. The goal is for the theory to create more accepting and encouraging classroom environments through DOVE. D: detaching from negative …

Declining Democracy Amid Historical Legacies: Democratization Across The Maghreb, Jacob Sagers

Undergraduate Honors Capstone Projects

Institutions and security forces are vital in determining democratization’s success or failure, but how do they interact with civilians to counteract, or support, existing regimes? Hopes for a fourth wave of democratization were dismantled over the past decade as the Arab uprisings have had inconclusive results, posing a threat to the ideological basis for U.S. foreign policy and Western states' legitimacy. Broad economic and Western foreign policies applied worldwide over the past few decades have also been ineffective at supporting this process and producing sustainable democratic transitions. But what specifically about these factors in the Maghreb gave way to Tunisia’s …

A Model Of Changeover Behavior In Concurrent Schedules Of Reinforcement, Matias A. Avellaneda

All Graduate Theses and Dissertations, Fall 2023 to Present

Animals in the wild have access to a variety of food sources, and they must allocate their time between them in an efficient manner. This requires deciding when to depart from the source currently being exploited to travel to a different one. A general model of this decision process can be derived from three assumptions well supported by the learning literature. The first one is the so-called matching law, which says that the proportion of time allocated to any one behavior equals the proportion of total value obtained from that option. The second one is that the dwell times (i.e., …

Scheduling Charging For Fleets Of Battery Electric Vehicles: Techniques For Modeling And Real-Time Operation, Justin J. Whitaker

All Graduate Theses and Dissertations, Fall 2023 to Present

While electric vehicles (EVs) are becoming increasingly popular and can provide cost, maintenance, and environmental benefits, they present unique challenges for regular operation, especially in fleets of vehicles. The limited range, long charging times, and high power requirements of EVs complicate the operations of fleets comprised of EVs. Additionally, the charging costs of EVs can be complex, depending on the time of charging, the energy charged, and the power level of the charging session. These complex charging costs can be significantly affected by the presence of uncontrolled loads. These challenges are further complicated by the inevitable variations in the real …

Aerobic Biodegradation Of Algae-Derived Bioplastics Under Controlled Composting Conditions, Clayton J. Lords

All Graduate Theses and Dissertations, Fall 2023 to Present

Plastics are versatile polymers that have become critically important materials in many industries. Although plastics are important and useful materials, they account for vast amounts of environmental pollution and climate change contribution. Sustainable bioproducts are becoming increasingly important in the effort to mitigate the impacts of pollution and climate change. The scale of environmental damage caused by plastic pollution highlights the need to implement sustainably sourced biodegradable plastics within the global economy. Bioplastics are materials that may be manufactured from biological materials or can biodegrade under certain conditions. Algae are microorganisms that can be grown using nutrient-rich municipal wastewater; the …

Influence Of Physical Properties Of Fat On Product Quality, Shelf-Life And Consumer Acceptance Of Chocolate-Coated Products, Audrey Lidgard

All Graduate Theses and Dissertations, Fall 2023 to Present

In chocolate-coated products, oil migration in fats can lead to chocolate softening, filling hardening, discoloration, and lower consumer acceptance. This study examined three different fats (soy- palm-, and palm-kernel (PK) based), crystallized under different conditions (cooling rate and use of high intensity ultrasound (HIU)) to examine how the crystallization conditions impact the physical properties of confectionery products. These conditions produced fats with high and low oil binding capacities (OBCs); the ability of crystal networks to entrap liquid oil. Model systems were created to examine measurable quality degradation and consumer acceptance of chocolates placed in contact with the fats; one with …

Effects Of Light Intensity On Algae Biofilms In Rotating Algae Biofilm Reactors (Rabr), Joshua D. Wintch

All Graduate Theses and Dissertations, Fall 2023 to Present

There is a growing need for economically and ecologically friendly wastewater treatment processes. Utilizing natural algae biofilms to remediate excess nitrogen and phosphorus from municipal wastewater is a treatment technique of academic interest. Utilizing natural algae in rotating algae biofilm reactors (RABR) is a potential engineering application of algae biofilms for municipal wastewater anaerobic digestor effluent treatment. The ideal reactor operation would use sunlight as the light source for algae growth, however, there is little academic research on algae biofilm growth productivity across natural sunlight light intensity ranges. This research seeks to understand the relationship between rotating algae biofilm reactor …

The Impact Of Absolute Education On Young Voter Turnout, Reagan Roark

All Graduate Theses and Dissertations, Fall 2023 to Present

American civic education continually proves to need attention and reform. This research evaluates whether implementing specific teaching strategies at the high school level impacts a student's future political participation; specifically, to more clearly outline whether a high school level civics curriculum directly impacts a student's likelihood to cast a voting ballot in midterm and presidential elections within six years of graduation. This paper aims to understand better if teaching and/or education reform is effective in helping future generations and the democratic fate of our country. In this study, we measure the current state civic graduation requirements compared with the state's …

The Desert Shall Rejoice: Lds Relational Values And Multispecies Justice In The Intermountain West, Sarah A. Woodbury

All Graduate Theses and Dissertations, Fall 2023 to Present

In the American West, climate change is shifting weather and climate patterns in ways that may dramatically change lands, livelihoods, and communities. In the face of these threats, conservationists and local communities must work collaboratively to ensure that environmental and human communities are healthy enough to weather approaching shifts. Church of Jesus Christ of Latter-day Saint (LDS) values, practices, and histories strongly influence the Intermountain West, yet there is little research on LDS environmental values and perceptions. This study seeks to answer questions that work in this gap. It documents the knowledge and values of communities in the Intermountain West …