Digital Commons Network^™

Nitrogen Form Determines Lettuce Yield In Continually Replanted Systems, Noah J. Langenfeld, Bruce Bugbee

Utah Space Grant Consortium

Nitrogen (N) recycling is essential in closed root-zones for bioregenerative life support in crewed missions. Microorganisms recycle organic N forms from human waste into ammonium and nitrate for plant growth. We used lettuce as a model crop to examine yield under multiple N sources modelled from N recycling. Plants were grown in peat moss media adjusted to pH 6 or 7 for five repeated plantings in the same containers without replacing the media. A nutrient solution was used for both studies that contained N as either ammonium nitrate, ammonium, nitrate, urea, or microbial biomass from the N-fixing microorganism Azotobacter vinelandii …

A Simple Sonication Method For Generating Monodispersed Nanoparticles Of Hydrophobic Antioxidants, Kyle Jackson, David Britt, Yu Huang

Utah Space Grant Consortium

Various hydrophobic antioxidants remain unexplored for the treatment of space radiation and oxidative stress due to their inability to enter the cell without a drug delivery vehicle as their surface properties cause them to suffer from a poor solubility. In this paper you will find a recent breakthrough of a new method to create neat antioxidant nanoparticles free of any surfactant whatsoever vastly improving inherent solubility. These nanoparticles are synthesized monodispersed with a low polydispersity. This is even more suitable for astronauts then other generation methods, as the cocktail is without any solvent or surfactant which can have unknown effects …

Biosignature Analysis In Saline Environments Using The Microfluidic Organic Analyzers For Biosignatures (Moab), Andrew Pack, Parker Jenkins, Jungkyu (Jay) Kim

Utah Space Grant Consortium

This study examines amino acid stability in high-salinity environments to enhance biosignature detection technologies. Using both absorption spectroscopy and capillary electrophoreses (CE), we investigated the survivability of valine and serine in laboratory-created brines simulating those found on celestial bodies throughout the solar system. Our findings reveal a protective effect of brines on amino acids, with reduced degradation rates compared to control samples containing no salts. During the 12-day observation period, both polar and non-polar amino acids showed enhanced stability in high-salinity environments, though non-polar amino acids exhibited more pronounced benefits from this protective effect. Valine concentrations in saline conditions decreased …

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.

A Novel Modular Spherical Joint For Truss Robots, Ivyann O. Running, Simon Charles, Eli Francom, Bryce Parkinson, Adam Rose, Hunter Pruett, Larry Howell, Nathan Usevitch

Utah Space Grant Consortium

Truss robots and structures are beneficial for lunar missions because of their high strength-to-mass ratio. Even better are robots and structures that are highly modular, allowing the same materials to be rearranged to perform various tasks. The joints of these robots are what must be connected and disconnected to create different truss forms. Therefore, it is necessary to develop highly mobile, modular spherical joints that allow multiple truss elements to attach. Moreover, these joints must be resistant to the lunar regolith. Our contribution in this paper is the design of a new spherical joint and its application to an isoperimetric …

Development And Implementation Of Compact Let Joints For Origami-Based Deployable Arrays, Katie Varela, Luke Gardner, Spencer Magleby

Utah Space Grant Consortium

Lamina emergent torsion (LET) arrays are not area efficient and exhibit significant parasitic motion. This makes them unsuitable for use in highly compact applications such as origami-based deployable arrays. This work presents a compact variation of the conventional LET array which resolves these issues. A method for fabricating these compact LET arrays, or C-LETs, from carbon fiber-reinforced polymer is given. Deflection and stress models for C-LETs are shown, and initial steps taken toward validating these models. A prototype origami-based deployable reflectarray incorporating C-LETs demonstrates that they provide the desired motion while maximizing the usable area of the array.

Modeling And Optimization Of Mets: An Enveloping Tensegrity Structure For Adaptive Stiffness Control In Space Applications, Ammon E. Gallart, Jeffrey R. Hill

Utah Space Grant Consortium

Tensegrity structures, defined by rigid elements in compression balanced by tensioned members, offer lightweight, flexible solutions for adaptive space systems. Stiffness modulation is vital for space applications, such as reinforcing robotic arms, stabilizing astronaut suits, and supporting deployable structures in microgravity. Traditional systems often rely on heavy actuators or rigid components, limiting adaptability and increasing mass. This research presents the Multi-Stiffness Expandable Tensegrity Structure (METS), an enveloping tensegrity system designed to conform to spacecraft appendages and provide tunable stiffness without external power. Using control string actuation and unit cell optimization, METS achieves scalability and adaptability, validated through modeling, innovation, and …

Bi-Level Route Optimization And Path Planning With Hazard Exploration, Grant Stagg, Cameron K. Peterson

Utah Space Grant Consortium

Effective risk monitoring in dynamic environments such as disaster zones requires an adaptive exploration strategy to detect hidden threats. We propose a bi-level unmanned aerial vehicle (UAV) monitoring strategy that efficiently integrates high-level route optimization with low-level path planning for known and unknown hazards. At the high level, we formulate the route optimization as a vehicle routing problem (VRP) to determine the optimal sequence for visiting known hazard locations. To strategically incorporate exploration efficiency, we introduce an edge-based centroidal Voronoi tessellation (CVT), which refines baseline routes using pseudo-nodes and allocates path budgets based on the UAV's battery capacity using a …

Cultivating Confidence, Curiosity, And Motivation In The Second Language Classroom, Janelle Carter

All Graduate Reports and Creative Projects, Fall 2023 to Present

This portfolio documents the author's journey through the Master of Second Language Teaching (MSLT) program at Utah State University, highlighting the evolution of their teaching philosophy and pedagogical practices through theoretical exploration, hands-on classroom experiences, and reflective practice. It details the integration of current research, collaborative learning, and innovative assessment strategies, such as self-created rubrics, to foster student engagement and agency in teaching German as a second language. Additionally, the portfolio includes a co-authored research study that examines the motivational factors influencing university students’ decisions to continue learning Arabic, French, and German. This study explores how personal, academic, and social …

Tremblings, May 2025, Western Aspen Alliance

Tremblings

Aspen, Fire, and People: Then and Now

Eva Strand. Professor of Rangeland Ecology, University of Idaho

People living and working in the Great Basin, USA, are observing changing fire conditions. Larger and more frequent fires across the West are well-documented, but less is known about how these changes manifest across Great Basin ecosystems, including in quaking aspen. In our recent Ecosphere paper, mean fire return interval (mFRI) changes across major Great Basin vegetation types between 1961–1990 and 1991–2020, were compared with LANDFIRE’s historical (pre-1900) estimates. For those not familiar with mFRI, it is the average number of years between successive …

Beyond The Finish Line: How Mindset And Setbacks Shape Future Success Of High School Sprinters, Hannah L. Lybbert

Undergraduate Honors Capstone Projects

How does mindset shape sports performance? Using data from high school track and field 100- meter sprint times, I examine how exogenous psychological shocks—caused by running faster or slower than expected due to tailwinds or headwinds—influence subsequent athletic performance. By leveraging instrumental variable analysis and random wind variation, I isolate the purely psychological effects (referred to throughout this paper as “mindset effects”) of performance confidence. I parse out the sustained mindset effects, taking into account athlete-specific fixed effects, and estimate mindset-driven performance effects. In the discussion, I will explore “perceived self-efficacy” (PSE) as a potential mechanism by which these mindset …

The Impact Of Lactoferrin And Iron-Enriched Whey On Iron Absorption, Gastrointestinal Symptoms, And Menstrual Health In Women, Mia Dustin

Undergraduate Honors Capstone Projects

Iron is an essential trace mineral involved in oxygen transport, energy metabolism, and cellular function, yet deficiency remains prevalent among women of reproductive age. In the U.S., approximately 20% of women aged 18-45 years fail to meet daily iron requirements due to lack of iron consumption in the diet, menstrual blood loss, or intense exercise, often leading to anemia, fatigue, and cognitive impairment. While ferrous sulfate is a common form of iron supplementation, it frequently causes gastrointestinal discomfort. Researchers have explored lactoferrin, a glycoprotein with immune and iron-binding properties, as an adjunct to traditional supplementation. This study examines the effects …

Ghostlight: A Fargedy, Ethan Thomas Shaw

Undergraduate Honors Capstone Projects

Frequently, throughout art media, artists rarely venture from realism. With the stylistic tools and artistic innovations made over the last 150 years that venture past realism, it is time for artists everywhere to take the next big step and begin the ombre of style and genre within works, challenging society in new ways. The goal of this project is to research the function and effect of different genres and styles within theatre and find what is required to successfully communicate them both textually and within a production. This includes reading and researching plays, theatre history, and the influence/evolution of style …

Creating A Stat2 Knock-Out Rat With Crispr/Cas9 Using I-Gonad, Isabella Dejesus

Undergraduate Honors Capstone Projects

Through the use of genetically modified animals, a more holistic understanding of physiologic responses to various diseases and pathologies can be obtained^7,19. The STAT2 gene encodes a protein called Signal Transducer and Activator of Transcription 2 and is an excellent target for genetic manipulation due to its essential role in type I and III interferon signaling pathways¹¹. A member of the STAT family of transcription factors, this protein is directly involved in mediating cellular responses to various cytokines and growth factors, particularly those related to the innate immune response¹¹. While the STAT2 signaling pathway …

The Stem Gender Gap: Can It Be Closed?, Makenna Roberts

Undergraduate Honors Capstone Projects

Despite increasing gender parity in many professional fields, women remain underrepresented in STEM industries, particularly in math-intensive areas such as engineering, computer science, and physics. This report explores the persistent gender gap in STEM through analysis of two data sources: gendered differences in the US national Scholastic Aptitude Test (SAT) performance and post-graduate employment patterns among scientists and engineers.

The first portion of the analysis examines SAT score data from 2018 to 2024, with a focus on high-performing test-takers. Using Python and R, data was extracted and visualized to compare male and female performance on the Math and Evidence-Based Reading …

Training Lander For Rover Arm Testing, James Peck

Undergraduate Honors Capstone Projects

The purpose of this honors capstone project is to design and fabricate a training lander to support the Utah State University (USU) rover team in preparation for the University Rover Challenge (URC). The URC is an international collegiate competition featuring four missions, one of which—the Equipment Servicing Mission—demands a high level of robotic arm functionality and operator skill. Historically, USU's rover teams have struggled to qualify for the URC finals, in part due to limited hands-on training opportunities with the robotic arm.

To address this gap, the training lander replicates the tasks found in the URC Equipment Servicing Mission, such …

The Art Of The Duo And The Value Of Collaboration, Rebecca Farmer

Undergraduate Honors Capstone Projects

The Art of the Duo and the Value of Collaboration explores the duo as a laboratory for understanding the collaborative process between musicians and non musicians focusing on three central points. First, this project is a means to showcase and broaden my skills as a composer. Second, this project demonstrates my understanding of the strengths and weaknesses of common and uncommon instrumental pairings. Third, this project explores interdisciplinary collaboration. This project resulted in a public lecture recital featuring six duets I composed for various instruments: violin, bass, percussion, saxophone, voice, and piano.

I studied works by Debussy, Bartók, and Paganini, …

Survey Of Insect Pests On Cut Flowers In Utah, Elliot Roberts

Undergraduate Honors Capstone Projects

Cut flower production is a relatively new industry in the state of Utah, gaining momentum by 2020. However, little research concerning management of the crops and their pests has been conducted. One issue producers face are insects that harm the plants in ways such as feeding damage and transmission of diseases. Currently, it is unknown which insects target different species of cut flowers in Utah. Morphological identification of genera and species is often difficult or impossible because of the small size of many of the insects and minute differences between species. This project uses PCR and DNA sequencing to identify …

Evaluating The Self-Healing Capabilities Of Engineered Cementitious Composite Mixtures, Emma W. Baggett

Undergraduate Honors Capstone Projects

Engineered cementitious composites (ECC) is a class of ductile fiber-reinforced concrete designed to exhibit strain-hardening and multiple fine microcracking, instead of large brittle cracks, under tensile loading. The presence of high volume of non-hydrated cement particles in ECC have demonstrated self-healing potential of cracks in ECC. This study evaluates the influence of two ECC additives, limestone powder and crumb rubber, on the self-healing performance of ECC. Three ECC mixture designs were developed: a control mixture, a limestone powder-modified mixture and a crumb rubber modified mixture. Self-healing was monitored over a period of 90 days under alternating wet and dry conditions …

Weaving Freedom: A Sustainable And Autonomous Approach To Community Development In Rural Argentina, Caroline Johnson

Undergraduate Honors Capstone Projects

This paper examines how culturally sensitive, inclusive, and climate-responsive design can empower weavers in Blanca Pozo, Argentina by addressing the unique social, economic, and environmental challenges of the region, fostering autonomy and community resilience through innovative housing and communal spaces. AWANAY is a boutique rug design studio that makes custom artisanal pieces in remote Northern Argentina. Home to AWANAY’s skilled artisans, Blanca Pozo faces environmental pressures, including extreme heat, flooding, and limited access to electricity and fresh water. Drawing on the history of Argentine architecture and global sustainable design principles, this project proposes solutions tailored to the local climate and …

Data Science For Engineers, Heidi Moulton

Undergraduate Honors Capstone Projects

Undergraduate research is a core pillar of Utah State University’s College of Engineering. Many students become involved with research during their Junior and Senior years and begin to generate various forms of data. Most students, however, have received little formal education on how to process data, and there are currently no readily available resources within the College of Engineering. As a Mechanical Engineering and Data Science double major, I found the data processing techniques I learned in my Data Science courses invaluable as an undergraduate researcher, and now as a Mechanical Engineer at Apogee Instruments, I frequently draw upon these …

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 …

Engineering Planktonic And Biofilm Microalgae Systems For Productivity, Power Requirements, Cost, And Scalability, Dallin Chugg

All Graduate Reports and Creative Projects, Fall 2023 to Present

Microalgae cultivation offers dual benefits as an effective wastewater treatment method and a sustainable source of valuable bioproducts, such as biofuels, bioplastics, and feedstocks. This approach supports sustainability by transforming waste into high-value products while minimizing environmental impact. However, scaling microalgae cultivation to industrial levels presents significant challenges, particularly in optimizing harvesting efficiency, reducing mixing and transport costs, and managing large water requirements.

This report compares the productivity, scalability, cost, and energy requirements of two primary cultivation systems: planktonic and biofilm. Planktonic systems, such as open raceway ponds (ORPs), excel in light distribution and nutrient uptake due to continuous mixing, …

Aircraft Water And Waste Systems Curriculum Alignment For Updated Airmen Certificate Standards (Acs), Myles Miller

All Graduate Reports and Creative Projects, Fall 2023 to Present

The purpose of this project was to create a curriculum that aligns with the updated Airmen Certificate Standards (ACS) related to aircraft water and waste systems. The curriculum was designed to align with the FAA standards outlined in the ACS section II. Airframe Subject O. Water and Waste Systems. The curriculum includes components, operation, inspection, and servicing requirements for potable water and lavatory waste systems. The curriculum should equip students with the ability to identify, assess, and mitigate risks associated with lavatory waste systems, and the ability to locate and explain the procedures for servicing water and waste systems. The …

Designing And Modeling An Exoskeleton Mobility Device For Individuals With Paraplegia, Dan O'Crowley

All Graduate Reports and Creative Projects, Fall 2023 to Present

The objective of this project is to design and develop a lightweight mobility exoskeleton for individuals with paraplegia that enables transportation of the user in a standing position, supports the user during the sitting to standing transition, and can be loaded by the user into a vehicle. A device like this has the potential to mitigate many negative health impacts of seated mobility devices, reduce social barriers, increase job opportunities for the user, and improve independence, while providing cost savings for the users and the healthcare system.

The system consists of a 3-linkage inverted pendulum with motors at the knee …

Correlative Assessment Of Demographic Markers And Health Insurance On Self-Reported Health Status, Ismat Ara Sharin Sajnee

All Graduate Reports and Creative Projects, Fall 2023 to Present

This study investigates whether known demographic groups report poorer health status even after adjusting for health insurance. Research analyzes the factors that correlate with poor reported health status and demographic markers associated with inequitable healthcare access. Sealy-Jefferson et al. (2015) explores the rate of health insurance as a primary mechanism to mitigate the financial risk of accessing health care, but significant racial and ethnic health disparities continue to exist among insured populations.

This study uses pooled cross-sectional data from the National Health Interview Survey (NHIS) from 2019 to 2023 and simple linear regression models to examine the relationship between demographic …

Bomb Calorimeter As Proof Of Concept For Low-Cost Calorimeter To Measure Thermal Runaway In Pouch Cells To Facilitate Statistical Characterization, Mykell Johnson

All Graduate Reports and Creative Projects, Fall 2023 to Present

Transportation is becoming increasingly electrified, with the main energy storage system being lithium-ion (li-ion) batteries. Despite the widespread adoption of li-ion batteries, unique design abuse tolerance concerns need to be addressed, specifically regarding the catastrophic exothermic release of energy, called thermal runaway (TR). While TR is a major design consideration in all li-ion applications, it presents unique difficulties in the electric aviation industry. The Federal Aviation Administration (FAA) considers thermal runaway inevitable in a battery pack and requires containment of the event per DO311-A for certified aircraft. Due to the wide variability of TR, designing for this phenomenon can be …

"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 …

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, …

Beyond The Basics Motivation And Assessment In Sustaining Arabic Learning, Laila Eissa

All Graduate Reports and Creative Projects, Fall 2023 to Present

This portfolio presents the teaching philosophy, examples of teaching approaches and techniques, and a research project of the writer for the Master of Second Language Teaching at Utah State University (USU). It highlights collaboration with colleagues and faculty in Second Language Acquisition research, providing an overall overview of the entire experience. The research in this portfolio explores the theories behind language teaching and assessment through two sections: first, the teaching philosophy, and second, hands-on experience section. The third section focuses on the main research paper, which examines the motivational factors influencing students in Arabic, French, and German classes to continue …