Digital Commons Network^™

Ethical Decision-Making Processes In Authentic Environmental Engineering Contexts Through Systems Thinking And Team Collaboration Lenses: An Embedded Single Case Study, Toluwalase Eniola Brower

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Ethical and professional responsibility is a critical learning outcome emphasized in ABET accreditation. However, ethics instruction in engineering education often lacks integration of system-level considerations such as economic, environmental, and societal contexts, that are essential for developing engineering solutions that ensure the safety and welfare of diverse stakeholders. This embedded single-case study investigated the integration of authentic ethics instruction within a junior-level environmental engineering course at a Midwestern U.S. university during spring 2025 and explores how civil engineering student teams within the course engage in ethical decision-making process during authentic problem-solving.

The instructional intervention consisted of four problem-based ethics modules, …

Changepoint Detection As Model Selection: A General Framework, Michael A. Grantham

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

This dissertation presents a general framework for changepoint detection based on ℓ₀ model selection. The core method, Iteratively Reweighted Fused Lasso (IRFL), improves upon the generalized lasso by adaptively reweighting penalties to enhance support recovery and minimize criteria such as the Bayesian Information Criterion (BIC). The approach allows for flexible modeling of seasonal patterns, linear and quadratic trends, and autoregressive dependence in the presence of changepoints.

Simulation studies demonstrate that IRFL achieves accurate changepoint detection across a wide range of challenging scenarios, including those involving nuisance factors such as trends, seasonal patterns, and serially correlated errors. The framework is …

In-Field Tractor Operational Load Profile Generation In Support Of Advanced Tractor Testing In Mixedmode Power, Andrew Donesky

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

This dissertation addresses the need to better characterize real-world tractor power requirements across drawbar, power take-off (PTO), and hydraulic modes to support more representative tractor testing. Conventional testing protocols, such as OECD Code 2, emphasize steady-state performance under controlled high-load conditions, which do not reflect the mixed and dynamic demands of modern field operations. To address this gap, a Tractor Instrumentation System (TIS) was developed, validated, and deployed to collect high-resolution, mixed-mode power data during planting, anhydrous ammonia application, and grain cart operations. The TIS integrates physical sensors, including custom load pins, hydraulic pressure/flow sensors, and a redesigned PTO torque …

The Motivation And Influence Behind The Decisions Of High School Students To Participate In The National Ffa Organization, Taylor A. Nielsen

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

Today, high school students are increasingly engaged in extracurricular activities, navigating a diverse range of options for which clubs and organizations to join during their secondary education. This poses a challenge for students and for Career and Technical Student Organizations as they work to recruit talented students. High school students have several influences and pressures on their time, including peers, family, and teachers. These influences often recognize how organizations such as FFA can be pivotal in shaping students’ personal and professional development. We wanted to explore the motivations and influences guiding high school students’ decisions to join and actively participate …

Rapid State-Of-Health Estimation Of Batteries Using Machine Learning With Limited Eearly-Discharge Voltage Data, Mohammad Bakhtiari

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

The utilization of lithium-ion batteries has been rapidly expanding across diverse sectors, including electric transportation, stationary energy storage systems, and the built environment. Ensuring a high level of reliability in these applications is essential, as the performance and safety of such systems depend strongly on the accurate assessment of the battery’s State of Health (SOH). Conventional SOH estimation techniques—often based on complex electrochemical models or extensive laboratory testing—tend to require a large number of measurements, advanced instrumentation, and high computational cost. These factors make them impractical for large-scale deployment or real-time monitoring. This study introduces a simplified machine-learning-based approach for …

The Graphic Shift: Leveraging Superhero Graphica To Un-Ban Critical Conversations In The Secondary English Language Arts Classroom, Avery Clason

Department of English: Dissertations, Theses, and Student Research

This thesis investigates the challenges that books are receiving during an era of social and political turmoil based on their content. Understanding why these books are polarizing for most readers and the general public is in direct connection with finding different books that can harbor the same conversations about dense topics and cultivating connections between students, the text, the world, and themselves. While there has been a search to find alternate books that are not considered "political flashpoints,” there has been limited research into the use of superhero graphica in the ELA classroom, especially in connection to utilizing this genre …

A Word From The Writing Team (December 2025), Pam Walter, Mfa, Laura Deloretta, Phd

A Word From the Writing Team (Newsletter)

No abstract provided.

Identification And Characterization Of Host-Modulating Effectors Encoded By The Cluster F1 Mycobacteriophage Normanbulbiejr, Bethany M. Wise, Kaylia Edwards, Cole R. Jirsa, Sabrina Abbruzzese, Amina Adebiyi, Sarika Bapat, Tyler Barnhardt, Naomi Bastiampillai, Ella Begovic, Mary G. Berchick, Gilda Bocco, John Bonoris, Elizabeth Boos, Margaret Cassady, Julia Chehab, Gene Cooper, Hunter Coyle, Joseph Davis, Natalia De La Cruz Vargas, Matthew Delach, Carly Dowiak, David Ferraro, Madison Fuller, Bootsie Glasser, Kyle Gordon, Hannah Hoch, Sarah Holleman, Luke Hood, Brett Hurrell, Nicholas Jacobs, Danny Jiang, Steven Kefalos, Salma Maher, Jocelyn Martin, Rohebot Mengesha, Daniel Merenich, Ashwin Nayak, Dasha Nesterova, Joshua Nguyen, Chukwudumebi Okonkwo, Taylor Pompan, Lauren Redwood, Christina Scanlon, Lily Schneider, Aparna Shenai, Colton Siatkowski, Lisa Strausner, Joseph Vizzarri, Jordan Watson, Angela Wilson, Catherine Wynne, Anthony Zygmunt, Michelle Kanther, Kimberly M. Payne, Richard S. Pollenz, C N. Sunnen, Danielle M. Heller

PCOM Scholarly Works

NormanBulbieJr (NBJ) is a temperate siphovirus isolated on the host Mycobacterium smegmatis mc²155 that encodes 102 gene products, 60 of which have no known function (NKF). Based on gene content, NBJ is classified as a Cluster F, Subcluster F1 phage and shares 70% of its encoded gene phamilies with Girr, another F1 mycobacteriophage that was recently analyzed in a genome-wide overexpression screen and found to encode 29 diverse gene products capable of inhibiting growth of M. smegmatis. Similar functional screens in other mycobacteriophages have uncovered a growing repertoire of diverse, phage-encoded bacterial growth inhibitors, providing prime candidates …

The Gravedigger, Arielle Soukal

Honors Projects

A city of old brick buildings, rich history, and winding waterways.

Welcome to Soli.

In the city center lies a crescent-shaped island that houses a park hiding more than just a body. When a pregnant Dryad is found on the forest floor looking as though she belonged on an autopsy table, Sentinel Ashwyn Nyx is called onto the scene by the local Warden. Piecing together her death with the assistance of the Warden's team of young Officers, Ashwyn vows to see the end of the case and bring peace to the woman's family. But things aren't as they seem, as …

Day In The Life Of A Labor And Delivery Nurse, Jordyn Roel

Honors Projects

"Day in the Life: Labor & Delivery Nurse," explores the profound duality of labor and delivery from a nurse’s perspective. It will honor the sacred role of the labor and delivery (L&D) nurse, whose hands both welcome new life into the world and comfort those facing the unimaginable pain of loss. This piece aims to offer a deeply human and empathetic portrayal of the realities of this field, showcasing both the breathtaking beauty of birth and the profound grief of natal loss.

Series Resonant Converters With Medium Voltage Sic Mosfets For Electric Aircraft Applications, Xinyuan Du

Graduate Theses and Dissertations

To develop high-performance high- power-density MV power converters, the emerging silicon carbide (SiC) devices are more attractive than their silicon (Si) counterparts, since the fast switch frequency brought by the SiC can effectively reduce the volume and weight of the filter components and thus increase the converter power density. From the converter topology perspective, with the MV dc distribution, the single stage isolated dc/dc converter are suitable for next-generation electric aircraft system due to soft switching and high power density. In this work, comprehensive static and dynamic characterizations were conducted for the latest 6.5 kV silicon carbide (SiC) MOSFETs from …

Predictive Modeling Of Listeria Monocytogenes Growth In Ready-To-Eat Meat Products, Manjari Singh

Graduate Theses and Dissertations

Listeria monocytogenes remains a significant food safety concern in ready-to-eat (RTE) meat and poultry products due to its persistence under refrigerated and stressed conditions. Predictive models play a vital role in risk assessment and food safety management; broth models are highly conservation & results in overprocessing. This thesis focuses on developing and validating meat-specific predictive models for Listeria monocytogenes growth and lag for RTE beef, pork, and poultry products. Matrix-specific secondary models were built to predict the maximum specific growth rate (μmax) of Listeria monocytogenes under varying environmental conditions, including temperature, pH, water activity, salt, organic acids, and nitrites. Growth …

Two Topics In Survival Analysis: Restricted Distance Covariance Test For Non-Proportional Hazard And A New Estimation For Dropout Rate, Ruizhe Yin

Graduate Theses and Dissertations

When treatment effects change over time, standard statistical methods, such as the log-rank test and the Cox proportional hazards model, may give misleading results. This dissertation presents the restricted distance covariance (rdcov) test, a nonparametric method that compares survival curves between groups within a chosen study period [0, τ] using right censored data. The statistic measures the dependence between pre-specified group labels and survival times using pairwise distances from Kaplan-Meier estimates. Our method does not rely on the proportional hazards assumption, and it equals zero only when survival functions are identical across groups. Thus, this test can be applied to …

Design Of Phase Shifter And True Time Delay Gan Mmics For High-Temperature Ku-Band Applications, Michael Lee Thompson

Graduate Theses and Dissertations

This thesis presents the design, implementation, and high-temperature characterization of Gallium Nitride (GaN) monolithic microwave integrated circuits (MMICs) developed for beamforming and phased-array systems operating in the Ku-band (12-14 GHz). Two integrated circuits were designed: a 3-bit digital phase shifter and a 3-bit true time delay (TTD), both optimized for high linearity, low insertion loss, low phase error, and stable operation at elevated temperatures up to 300°C. Developing both a phase shifter and a TTD enabled a direct comparison of their beamforming performance and the evaluation of beam squint effects over frequency, a critical factor in wideband array design. The …

Southern / Appalachian Migrants And Urban Development Politics In Uptown Chicago, 1950-1972, Charles Wayne Dowdy

Electronic Theses and Dissertations

This thesis investigates how ideas of interregional migration were used in service of urban renewal agendas in Uptown Chicago from 1950 to 1972. It argues that The South and Appalachia as regional ideas were impactful in postwar midwestern urban development politics, even as regional identity was less powerful as an adhering force for actual migrants in comparison with factors of race and class. Chapter 1 examines the development and use of the urban enclave model of interregional migration by the Uptown Chicago Commission in the late 1950s. It argues that anxieties around suburbanization and urban decline fueled the production of …

Beyond The Surface: Exploring The Experiences Of Black Female Athletes At Power 4 Institutions, Michonné Leatrice Gamble-Rivers

Electronic Theses and Dissertations

Black female athletes, have a long history of fighting for visibility and inclusion. They are celebrated and hyper-visible as performers on the court yet deemed invisible in the institutional decision making that shapes their holistic development and success. This Dissertation in Practice (DiP) challenges this structural problem looking to amplify voices that have been historically silenced by systems that reduce these individuals to mere athletic capital.

Beginning with Manuscript I, this three-manuscript dissertation is built on a conceptual framework anchored in Womanist Theory, Intersectionality, and Athletic Identity, providing the necessary critical lens to investigate challenges like double jeopardy and limiting …

Exploring The Relationship Between Secondary Student Perceptions Of Teacher Involvement And Student Academic Success In Online Social Studies Courses, Thomas Matthew Herrington

Electronic Theses and Dissertations

The rapid growth of online learning in secondary education has highlighted the need to better understand factors that contribute to student success. While considerable research has examined online learning at the postsecondary level and in state-tested subjects, little attention has been given to social studies courses. This qualitative study explored the relationship between secondary students’ perceptions of teacher involvement and their academic success in asynchronous online social studies courses. Participants included 22 students from two accredited high schools in Mississippi, one fully online and one traditional brick-and-mortar school, both of which offered asynchronous social studies courses approved by the state …

Glp-1ra Vs. Sglt-2i: Preventing Kidney Function Deterioration Among Patients With Type 2 Diabetes And Chronic Kidney Disease, Liang-Yuan Lin

Electronic Theses and Dissertations

Background: Emerging evidence suggests that glucagon-like peptide-1 receptor agonists (GLP-1RA) may improve kidney outcomes in individuals with type 2 diabetes mellitus (T2DM). However, direct head-to-head comparisons of their renal effectiveness with sodium-glucose cotransporter 2 inhibitors (SGLT-2i)—the recommended first-line therapy for older adults with T2DM and chronic kidney disease (CKD)—remain limited.

Objectives: To compare the renal effectiveness of GLP-1RA and SGLT-2i among older adults with T2DM and CKD.

Methods: A new-user, active comparator, matched cohort study was conducted using 5% Medicare data from 2012 to 2020. Older adults (≥65 years) with T2DM and CKD who initiated either a GLP-1RA or an …

Knowing One's Place At The Table: Taste As A Means Of Othering In The American Colonies, 1700-1775, Nicholas Harp

Master's Theses or Doctor of Nursing Practice

This thesis began as an inquiry into a simple question. How did people in the American colonies talk about the food that they ate? This question led to a fascinating look into the social dynamics of the people living in eighteenth century America. Their own personal writings demonstrate how they understood their place in society through the food that they ate. Moreover, they often wrote about the way that other people ate in ways that alienated or discriminated against different ethnic groups. A look into the secondary historiography revealed that other historians had noticed this trend. However, very few addressed …

Why The Triple Bottom Line Fails: Advancing The Jesuit Vision For Sustainability Education In Business, Trevor Zink, Melissa Fitzpatrick, Justin Nordin, Jeffrey S. Thies

Journal of Management for Global Sustainability

This paper critiques the Triple Bottom Line (TBL) framework as conceptually flawed and ethically insufficient for sustainability education in business. While the TBL aims to balance profit, people, and planet, its logic prioritizes profitability, rendering social and environmental goals conditional and marginal. We argue that this framing undermines critical thinking, moral imagination, and ecological literacy in business students—especially within Jesuit institutions, which are called to form conscientious leaders. Drawing on Jesuit educational tradition, we propose a reorientation of business purpose around economic sufficiency rather than profit maximization, guided by integral ecology and the common good. This shift invites a more …

Responsible Adoption Of Multimodal Artificial Intelligence In Health Care: Promises And Challenges., Ghazal Azarfar, Sara Naimimohasses, Sirisha Rambhatla, Matthieu Komorowski, Diana Ferro, Peter R Lewis, Darren Gates, Nawar Shara, Gregg M Gascon, Anthony Chang, Muhammad Mamdani, Mamatha Bhat

Ambulatory and Primary Care Articles

Clinicians rely on various data modalities-such as patient history, clinical signs, imaging, and laboratory results-to improve decision making. Multimodal artificial intelligence (AI) systems are emerging as powerful tools to process these diverse data types; however, the clinical adoption of multimodal AI systems is challenging because of data heterogeneity and integration complexities. The 2024 Temerty Centre for AI Research and Education in Medicine symposium, held on June 17, 2024, in Toronto, Canada, explored the potential and challenges of implementing multimodal AI in health care. In this Review, we summarise insights from the symposium. We discuss current applications, such as those used …

A Reversal In Fortunes: A Case Of Triumphant Retrograde Intubation., Vishal Tharani, Nickolas Meier

Ambulatory and Primary Care Articles

A 48-year-old male presented to the emergency department in respiratory distress, with a history of poorly controlled asthma and a remote history of pulmonary embolus. After failing a non-invasive ventilation trial and numerous treatments for presumed status asthmaticus, he was planned for intubation. During the procedure, a large supraglottic mass was visualized, obstructing the airway and preventing successful orotracheal intubation via video laryngoscopy. Securing the airway was complicated by cardiac arrest, likely hypoxia-driven. The patient underwent a successful retrograde intubation followed by post-cardiac arrest stabilization. This case highlights the technique and its role in difficult airway management.

Entre La Sombra Y El Lienzo: Clea Dessendre Como Modelo De Personaje Secundario Complejo, Lydia Huijbregts Jaen, Antonio Horno López

GDI. Revista de investigación de Género, Diseño e Innovación

Introducción: Este artículo analiza a Clea Dessendre en Clair Obscure: Expedition 33, explorando su versión real y la pintada en el lienzo, y su impacto en la narrativa del juego. Metodología: Se aplicó un análisis narrativo, psicológico y ludológico, integrando teorías de duelo (Kübler-Ross), socialización (Baumrind) y comunicación (DiSC) vinculadas con la jugabilidad. Resultados: Clea-Real encarna disciplina y perfeccionismo; Clea-Pintada, una proyección maternal. El gameplay conecta su psicología con la experiencia del jugador. Discusión: Las identidades paralelas muestran cómo traumas y expectativas moldean personajes complejos. Conclusiones: Clea evidencia cómo la narrativa y la mecánica se fusionan para crear …

Elena Asins Y Las Afueras Del Canon: Animación Computacional Y Resistencia, Maria Mar Garrido Román

GDI. Revista de investigación de Género, Diseño e Innovación

Este artículo examina las animaciones generadas por ordenador producidas por Elena Asins, analizando cómo su práctica artística moviliza el pensamiento lógico-matemático, la programación y la experimentación visual. A través de una revisión de su metodología, contexto de producción y resultados formales, el estudio explora la incorporación de procesos algorítmicos en su obra, que generan imágenes con extensión temporal y la consolidan como una figura clave en la historia del arte digital y la animación experimental en España.

La investigación se basa en el análisis de fuentes primarias y, con el objetivo de situar su producción en un marco internacional, establece …

Exploraciones Gráficas Y Narrativas: Autoras Españolas En El Cómic De Ciencia Ficción, Marina Hernández Ávila

GDI. Revista de investigación de Género, Diseño e Innovación

En este estudio se analiza el trabajo de varias autoras españolas que han incorporado el género de la ciencia ficción en el cómic contemporáneo, explorando nuevas posibilidades gráficas y narrativas. Partiendo de la evidencia de la escasa visibilidad que las creadoras han tenido tradicionalmente en el ámbito del cómic, se busca poner en relieve cómo estas autoras han contribuido a ampliar los límites del medio y del propio género, utilizando la ciencia ficción como una herramienta para abordar temas sociales, identitarios y existenciales del presente. La investigación se basa en el análisis visual y narrativo de las obras de una …

Animación Por Mujeres Colombianas: La Potencia Expresiva Del Trabajo Hecho A Mano, Daniela Posada Sarmiento

GDI. Revista de investigación de Género, Diseño e Innovación

Este artículo busca situar el trabajo de tres mujeres animadoras colombianas dentro del campo de investigación sobre el género y la animación, evidenciando la escasa presencia de sus aportes en la investigación académica. Se pretende demostrar la hipótesis que sostiene que: existen obras de animación contemporánea desarrolladas por mujeres colombianas que contienen aportes formales, conceptuales, estéticos y poéticos significativos para la investigación en torno a la animación. En primer lugar, se desarrolla un Estado de la cuestión con enfoque crítico, que permite identificar cómo se ha ignorado la participación de mujeres colombianas en los estudios sobre animación. Posteriormente, se caracterizan …

Representando El Buen Queer-Er: Otras Miradas Para Romper La Cisheteronorma En La Animación Infantil-Juvenil, Delicia Aguado Peláez, Patricia Martínez García

GDI. Revista de investigación de Género, Diseño e Innovación

Este artículo explora la ruptura de los estereotipos de género y la representación de la diversidad en series de animación infantil y juvenil creadas por mujeres y disidencias. Partiendo de un análisis de contenido cualitativo desde una perspectiva interseccional, examinamos la construcción de personajes, las dinámicas sexo-afectivas y las relaciones de poder que se encuentran en cuatro producciones: Star vs. Evil Forces (Daron Nefcy), Steven Universe (Rebeca Sugar), She-Ra and the Princesses of Power (ND Stevenson) y The Owl House (Dana Terrace). Todas ellas comparten una serie de características: ofrecen modelos alternativos de feminidad y masculinidad, más allá de …

The Relationship Between Exercise And Prospective Memory: A Meta-Analysis, Shaykhah Salman Alqahtani

Electronic Theses and Dissertations

Prospective memory (PM)—the ability to remember and carry out future intentions—is essential for everyday functioning. This cognitive process involves intention formation, retention, cue detection, and execution. Emerging research suggests that physical exercise may influence prospective memory performance through potential enhancements in attention, executive functioning, and neuroplasticity. This thesis examines the relationship between physical exercise and prospective memory through a systematic review and meta-analysis of the existing literature.

This review synthesized evidence from experimental studies to evaluate the effects of acute and chronic exercise interventions on prospective memory in diverse populations. Six studies met the eligibility criteria and were included in …

Racial And Ethnic Differences In The Associations Between Alcohol Use Disorder, Aggression, And Suicidality Among Adolescents With Ptsd, Gabrielle Armstrong

Electronic Theses and Dissertations

The comorbidity of posttraumatic stress disorder (PTSD) and alcohol use disorder (AUD) is well documented and associated with elevated risk of aggression and suicidality among certain populations. However, no research to date has examined these associations among adolescents. Using data from the National Comorbidity Survey-Adolescent Supplement (NCS-A), the present study examined whether the presence of AUD was associated with greater outward aggression, suicidal ideation, and attempts, and whether these associations differed across race/ethnicity, in a weighted sample of 737,996 adolescents with PTSD (10.3% Hispanic, 16.4% Black, 73.3% White). AUD presence was significantly associated with higher odds of breaking items, attacking …

A Road Less Traveled: Exploring The Motivators Influencing College Enrollment Decisions Among Youth Who Have Experienced Foster Care, John William Blue

Electronic Theses and Dissertations

Youth who have experienced the foster care system are an underserved student population in higher education. While higher education is an important pathway to upward mobility and civic participation, foster youth consistently face systemic barriers such as unstable placements, limited financial resources, and a lack of consistent adult guidance, resulting in significantly lower rates of college enrollment and degree attainment compared to their peers (Courtney & Okpych, 2020; Salazar, 2013). This three-manuscript dissertation investigates the challenges that youth who have experienced foster care face and the factors that influence them to pursue enrollment in four-year universities in Illinois, while also …