Digital Commons Network^™

Cazyme Gene Cluster Diversity In Human Gut Microbiome, Yi Xing

Department of Food Science and Technology: Dissertations, Theses, and Student Research

In gut microbiome research, carbohydrate-active enzyme gene clusters (CGCs) have emerged as key functional units for understanding microbial glycan degradation. Unlike taxonomic or broad pathway annotations, CGCs offer gene-cluster-level resolution and capture substrate-specific microbial functions. However, their diversity and distribution in relation to host metabolic phenotypes, such as obesity, remain poorly characterized. This study tests the hypothesis that the composition and abundance of fiber-targeting CGCs vary between obese and healthy human gut microbiomes, reflecting distinct microbial carbohydrate utilization strategies. To examine this, we constructed a high-quality reference CGC dataset comprising 94,019 clusters from the Unified Human Gastrointestinal Genome and profiled …

Exploring And Characterizing Organic Chemistry Students’ Meaningful Engagement In Science Practices, John Zhou

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

Undergraduate organic chemistry frequently engages students in key science practices such as analyzing and interpreting spectroscopic data and constructing explanations through reaction mechanisms. However, these activities are often framed as procedural tasks rather than as tools for constructing knowledge. As a result, students may develop incomplete understanding of these practices, making it harder for them to see how scientific knowledge is generated and to use them meaningfully as tools for sensemaking. To better understand how students take up these practices as epistemic tools, three qualitative studies were conducted in this dissertation to investigate how undergraduate organic chemistry students reason with …

A Quantitative Examination Of The Sexual Health Of Aging Black Men In Rural South Africa, Esihle Lupindo

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

This dissertation uses survey data primarily from Wave 1 of the Health and Aging in Africa: Longitudinal Study of In-depth Community in South Africa (HAALSI) which was collected in 2015 to study the sexual health of Black men in rural Mpumalanga, South Africa. Broadly speaking, I examine aging men’s sexual health as it related to HIV, well-being, loneliness, social networks and disclosure. The definition that I use for sexual health was coined by MacPhail and Campbell (2001) who define it as “not only sexual practices but also what people know and believe about sex, particularly what they think is natural, …

Gmos And Public Perception: College Students’ Opinions And Knowledge Of Genetic Engineering, Serene M. Cheng

RURALS: Review of Undergraduate Research in Agricultural and Life Sciences

Genetically modified organisms (GMOs) can be developed and implemented to address significant global challenges, including nutrient deficiencies, climate change, and crop disease. However, widespread opposition has prevented the success of GMOs. We believe this opposition is strongly connected to a lack of understanding about genetics in general, which has been reflected by previous studies.

In this study, we considered the relationship between GMO support and genetics knowledge by comparing results from a brief quiz and responses to prompts relating to GMOs. Using a survey of college students, we found that support for GMOs and general knowledge of genetics are positively …

Genomics-Based Taxonomic Refinement Of Emesis Fabricius (Lepidoptera: Riodinidae), Jing Zhang, Qian Cong, Jinhui Shen, Leina Song, Nick V. Grishin

Insecta Mundi

Expanded genomic sequencing of Emesis [Fabricius], 1807 (Lepidoptera: Riodinidae Grote, 1895) reveals additional taxonomic insights. As a result of this study, one subgenus and 10 species are proposed as new (type species or type localities in parenthesis): Sinuata Grishin, new subgenus (Emesis sinuatus Hewitson, 1877) of Exoplisia Godman and Salvin, 1886; Emesis (Mandania) mandaca Grishin, new species (Mexico: Oaxaca); Emesis (Mandania) mantunga Grishin, new species (Ecuador: Tungurahua); Emesis (Tenedia) hidalga Grishin, new species (Mexico: Hidalgo); Emesis (Tenedia) vera Grishin, new species (Mexico: Veracruz); Emesis (Tenedia) nica Grishin, new species …

Erratum To Golovatch Et Al. (2025): Contributions To The Taxonomy Of The Neotropical Millipede Genus Iulidesmus Silvestri, 1895 (Diplopoda: Polydesmida: Paradoxosomatidae: Catharosomatini), Sergei I. Golavatch, Juan Romero-Rincon, Nesrine Akkari, Santiago Alvear

Insecta Mundi

After publication of Golovatch et al. (2025), it was noticed that Figure 3 was accidentally omitted. The authors and the Insecta Mundi editorial staff apologize for this error. Figure 3 is reproduced here. Insecta Mundi has also released a revised version of the Golovatch et al. (2025) manuscript, with this error corrected. However, the revised version is not an official version of record, and anyone wishing to reference the findings of Golovatch et al. (2025) should cite the original manuscript or this erratum.

The Enigmatic Samuel Aughey: Nebraska’S Pastor Naturalist, Hugh H. Genoways, Margaret R. Bolick, Mary Anne Andrei

Zea E-Books Collection

Samuel Aughey at age 39 became the first Professor of Natural Science at the new University of Nebraska in Lincoln, serving from 1871 to 1883. He was an ordained pastor of the Evangelical Lutheran Church, with an addendum degree from Pennsylvania College (now Gettysburg College) in 1856 and an A.M. degree two years later. His early pastoral work was in Pennsylvania, but in 1864 he became a home missionary to a church in Dakota City, Nebraska. Aughey’s career at the university was marked with successes and honors, but also criticism and questions about his basic knowledge of the sciences. While …

Spring Field Report, March–May 2025, W. Ross Silcock

Nebraska Bird Review

Perhaps the most important takeaway this spring is the continuing phenomenon of large numbers of species with early spring arrival dates. Although about half as many as 2024, there were 64 examples of either tied or new early arrival dates, most obviously of insectivores such as swifts, flycatchers, vireos, swallows, pipits, longspurs, and 10 warbler species. Among these, record or near-record early were Whip-poor-will, Black-necked Stilt, Marbled Godwit, Black Tern, Olive-sided Flycatcher, Purple Martin, Rock Wren, Gray Catbird in central, Spotted Towhee in north and west, and Hooded Warbler.

Following along logically perhaps with early arrival dates were a number …

The Nebraska Bird Review (June 2025) 93(2), Whole Issue

Nebraska Bird Review

Spring Field Report, March–May 2025, by W. Ross Silcock

NOU Spring Field Days and Annual Meeting in South Sioux City, May 16–18, 2025

Abstracts of posters presented at Spring 2025 NOU Meeting

Spring 2025 NOU Meeting Species Tally

An Unusual Trumpeter Swan (Cygnus buccinator) in Nebraska: Albinism or Leucism? by Jacob C. Cooper, Peggy M. Huss, Eugene A. Huryn, and Cody McGregor

Subscription and Organization Information

Farmnav-Uav: A Field-Ready Autonomous Uav For Tracking Static And Dynamic Trajectories In Agricultural Applications, Veera Venkata Ram Murali Krishna Rao Muvva

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

This study presents the design and development of a custom-built uncrewed aerial vehicle (UAV) tailored for precision agriculture. Unlike commercial UAVs, which are often constrained by proprietary systems and limited hardware customization, the proposed platform emphasizes modularity, upgradeability, and cost-effectiveness. The UAV is equipped with a Cube Blue flight controller for reliable low-level actuation and a Raspberry Pi 4 companion computer that executes a Model Predictive Control (MPC) algorithm for high-level trajectory optimization and stability enhancement.

Most conventional UAV autopilot systems rely on non-optimal control strategies, such as proportional–integral–derivative (PID) controllers, which can be inadequate for dynamic or resource-constrained environments. …

Integrating High Throughput Phenotyping Approaches To Characterize Plant Traits And Support Nutrient Management Research, Katie J. Bathke

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

Over the past decade, considerable research has addressed the social, economic, and agronomic challenges posed by imbalanced nutrient applications, particularly nitrogen and, more recently, sulfur. In response, high throughput plant phenotyping, as one of the latest approaches, has contributed to the development of innovative techniques for assessing key plant phenotypes under stress over time in both field and greenhouse environments. However, there is a limited number of studies applying these techniques for nutrient management, particularly in scenarios where two abiotic stressors coexist, such as the combination of water stress and nitrogen deficiency, or concurrent nitrogen and sulfur deficiencies.

In chapter …

Nebraska Balanced Mix Design - Phase Ii, Farzad Yazdipanah, Mahdieh Khedmati, Jamilla Teixeira, Hamzeh Haghshenas

Nebraska Department of Transportation: Research Reports

This study aimed to propose a performance-based framework to evaluate highly recycled asphalt mixtures containing polymer-modified binders for potential use in a balanced mix design (BMD) specification in the state of Nebraska. For that, loose and compacted mixtures were directly collected from plant and field projects within a benchmarking study, subjected to an extensive experimental program. The laboratory investigation employed different monotonic tests recommended in BMD Phase 1, as well as the dynamic modulus test. Three long-term aging protocols were investigated in terms of their impact on the mechanical, rheological, and chemical characteristics of asphalt mixtures and binders. Moreover, field …

Four Synonyms Of Tetraleurodes Mori (Quaintance, 1899) (Hemiptera: Sternorrhyncha: Aleyrodidae), Natalia Von Ellenrieder, Raymond J. Gill, Ian C. Stocks

Insecta Mundi

Examination of type specimens of Aleyrodes errans Bemis, 1904, A. dorseyi Kotinsky, 1907 (replacement name for A. quaintancei Bemis, 1904), and A. splendens Bemis, 1904 and comparison with a large series of specimens of Tetraleurodes mori (Quaintance, 1899) (Hemiptera: Sternorrhyncha: Aleyrodidae) confirms that the first four names represent new junior subjective synonyms of the latter species, since their types do not differ from it in any significant way and display the combination of diagnostic characters that identifies that species.

Resumen

El análisis de ejemplares tipo de Aleyrodes errans Bemis, 1904, A. dorseyi Kotinsky, 1907 (nombre de …

A New Species Of Chrysobothris Eschscholtz, 1829 And Synonymy Of Two Species Of Acmaeodera Eschscholtz, 1829 From Baja California Sur, Mexico (Coleoptera: Buprestidae), Richard L. Westcott

Insecta Mundi

A new species of Buprestidae (Coleoptera), Chrysobothris bajacalifornica Westcott, is described from Baja California Sur, Mexico and discussed in relation to species I consider related to it. Acmaeodera lagunae Van Dyke, 1945 is newly synonymized under A. flavosticta Horn, 1878, and A. lucana Van Dyke, 1942 is newly synonymized under A. subbalteata LeConte, 1863. A lectotype is designated for A. flavosticta Horn.

Experiential Learning In Lecture Settings For Ides 200: Programs, Codes & Standards, Emily Cerny

UNL Faculty Course Portfolios

In traditional lecture settings, students take notes from a lecturer’s recitations and have minimal interaction with each other and the world around them. For IDES 200: Programs, Codes & Standards, a key aspect of learning is for students to understand the connections between the concepts learned in class and the built environment. To increase this connection and get students thinking in different manners, experiential learning methodologies were introduced through in-class exercises and within the course assignments alongside typical lectures and lecture comprehension quizzes. By surveying students’ perceptions of assignments and course activities, the goal of this course portfolio is to …

Course Portfolio: Csce 478/878 Introduction To Machine Learning, Hongzhi Guo

UNL Faculty Course Portfolios

This course portfolio was developed for CSCE 478/878: Introduction to Machine Learning, offered by the School of Computing at the University of Nebraska–Lincoln, as part of the Faculty-led Inquiry into Reflective and Scholarly Teaching (FIRST) project. The course provides an introduction to foundational machine learning concepts, models, and programming tools. It enrolls both undergraduate and graduate students from a wide range of academic backgrounds, including computer science, computer engineering, software engineering, biological systems engineering, chemical engineering, business-related fields, etc. Offered in Spring 2025, the course was peer-reviewed to support continuous improvement in teaching. The primary goals of this portfolio are …

The Sauce To Meat Is Ceremony: Cannibalism And Hospitality Serve As Horror And Culture Tropes In Hannibal And Macbeth, Shay Williams

Dialogue: The Interdisciplinary Journal of Popular Culture and Pedagogy

When examining Macbeth (1623) as a case study within Shakespeare’s canon, we see all the obvious horror tropes - murder, witches, a ghost, bodies, blood and gore. What is less pronounced is the horror that lies within eating, drinking, feasting, and the ceremony of banquets. On the other side of the spectrum, and unlike the character of Macbeth, we have a figure that epitomizes all things horror, and has been read about in novels, watched on film, and as of late (2013-2015) has been the subject of a Television show, aptly named: Hannibal. In both works, we encounter men/monsters/killers …

“Honey, Life Is Just A Classroom:” Using Taylor Swift As A Pedagogical Tool For College Composition, Liz Thomae

Dialogue: The Interdisciplinary Journal of Popular Culture and Pedagogy

As educators, we confront the challenge of cultivating a deeper understanding of writing in an age obsessed with utilitarianism, instant gratification, and pragmatism. Students come into our classrooms inundated with these messages of utility and often find subjects within the humanities, especially first year writing, boring and unhelpful. Especially with the rise of generative artificial intelligence (AI) use in our classrooms and society at large, we as pedagogues have our work cut out for us. I propose a pedagogical approach that bridges students' interests with essential writing skills by integrating Taylor Swift's music into the composition classroom. Swift's evolution as …

Using Fantasy Sports To Connect Process With Product In Adpr/Spmc 464/864 – Sports Media Relations And Promotion, Brian Petrotta

UNL Faculty Course Portfolios

The purpose of this portfolio is to analyze the relationship between assignments and desired learning outcomes in ADPR/SPMC 464/864 – Sports Media Relations and Promotion. ADPR/SPMC 464/864 Sports Media Relations and Promotion remains a challenging course to navigate but the process of developing this portfolio demonstrates that it has many strengths. The first of these strengths is the simple structure that centers the course around a fantasy football team (NFL in fall, EPL in spring). Most students were already familiar with fantasy sports and, in general, appreciated the inherent competition within this structure. Feedback from students’ year-end self-assessments from two …

Do We Really Need A Femininemenon?: The Gendered Context Of Congress And Women’S Representation, Hannah Scholen

Honors Program: Senior Projects (Public)

Does the changing gendered context of Congress affect women’s representation? The literature shows that women are more likely than men to prioritize and introduce issues that have a distinct impact on women, such as education and health, and that women’s power as a minority group changes when their numbers grow. With the growing number of women in Congress, it’s crucial to understand how that increase affects Congresswomen. I use the Center for Effective Lawmaking’s Legislative Effective Score methodology, focusing on the education and health Issue Area LES’, and run interaction regressions to study the relationship between gender and legislative effectiveness, …

Where To Deposit Your Master’S Thesis Or Doctoral Dissertation In The Unl Digital Commons, Sue Ann Gardner, Paul Royster

Thesis and Dissertation Deposit Information Resources

A list of degree-granting programs with links to the proper series for thesis and dissertation deposit in the UNL Digital Commons.

UNL = University of Nebraska-Lincoln.

Updated May 2025.

Find your degree-granting program in the list, then click on the link to go to the proper series to deposit your thesis, dissertation, or other student work.

If you have questions about the process or problems finding the correct series or uploading your work, contact Sue Gardner.

Automated Client Dashboard For Facts Student Information System, Kashish Syed

Honors Program: Senior Projects (Public)

This project addresses the challenges of student data migration for K-12 educational institutions to the FACTS Student Information System (SIS). Historically, data migration from legacy platforms has been a manual and error-prone process. To streamline this workflow, an interactive client dashboard and automated validation system were developed as part of this capstone. The resulting solution is a scalable, intuitive tool that enhances data accuracy, reduces manual labor, and improves the user experience for both school administrators and FACTS staff. This report blends the technical implementation with reflections on project management, team collaboration, and lessons learned, offering a comprehensive view of …

Proposed Civil Design Package For Lincoln Youth Sports Complex, Gracie Kerr, Hayden Wulf, Kiley Pham, Caitlin Keathley

Honors Program: Senior Projects (Public)

The following report is a proposal of civil work and an engineering design package for the City of Lincoln to construct a Youth Sports Complex on the vacant lot at 2100 North 1^st Street, Lincoln, Lancaster County, Nebraska. The city has requested five U10 to U14 combination baseball and softball fields, one championship softball field, and one championship baseball field. Additionally, a playground area, concessions building, and designated parking areas have been requested. This design package includes introductory company and project information, a summary of the design request and constraints, three overall design alternatives, discipline-specific engineering designs and recommendations, …

The Role Of Popular Culture In Decolonial Transformative Learning: A Racially Minoritized Adult Educator's Journey, Riyad Shahjahan

Dialogue: The Interdisciplinary Journal of Popular Culture and Pedagogy

While a growing body of literature examines the role of popular culture in transformative learning, much of it centers on fostering transformative experiences among learners, rather than educators themselves. This paper addresses that gap by exploring how popular culture enhances transformative learning for racially minoritized adult educators. Drawing from my experiences as a graduate instructor at a predominantly white institution, I reflect on how engaging with popular cultural texts facilitated my own transformative learning within my teaching practice. Grounded in decolonial theory, which emphasizes the inclusion of Indigenous and marginalized knowledges while confronting contemporary colonial oppressions, my reflexive approach highlights …

What Is Climate Smart Agriculture? : A Standardized Framework For Assessing The Effectiveness Of Climate Smart Agriculture Systems And Practices, Olivia G. Messerges, Trenton W. Ford

RURALS: Review of Undergraduate Research in Agricultural and Life Sciences

The United States agricultural system is challenged with feeding a growing population, adapting to climate change, and minimizing environmental damage. In response to these challenges, the paradigm of climate-smart agriculture (CSA) was developed to describe practices that address these challenges as a comprehensive strategy to address climate change and increase food security.

Definitions of CSA vary, but surround three main pillars: increasing productivity, enhancing adaptation, and reducing emissions. However, no standardized framework exists to assess if practices or technologies identified as "climate-smart" produce the desired benefits. A standardized framework would enable producers, policymakers, and researchers to improve CSA implementation, policy …

Benefits And Applications Of Learning With Virtual Reality, Michael W. Timm

Honors Program: Senior Projects (Public)

Education is a fundamental pillar of society. It equips students for employment and interpersonal relations. Virtual reality (VR) has emerged as a transformative technology in the field of education. The aim of this paper is to synthesize existing research in order to determine the benefits of utilizing virtual reality in a variety of education settings, such as K-12 classrooms, universities, and workplace training. This paper observes significant benefits of virtual reality in constructivist and experiential learning, gamified learning, and tailored practice. This analysis also finds that virtual reality is advantageous for educational accessibility, particularly for absentee students and impoverished students. …

The Importance Of Being Earnest: A Costume Designer’S Process, James Hunter Rock

Johnny Carson School of Theatre and Film: Theses, Student Research, and Creative Work

This thesis is a comprehensive breakdown of the costume design process for Nebraska Repertory Theatre’s production of The Importance of Being Earnest by Oscar Wilde during the fall semester of 2024. The author logs the production’s processes in collaborating on the concept and aesthetic of the play to present the Victorian era story for a modern audience. In this thesis, insights into the costume designer’s conceptualization, research, previsualization, and final design process are explored, providing an in-depth look into the creation of characters that remain true to the director’s original vision while being engaging for contemporary theatre. The various challenges …

Stop Design: Rethinking The Approach To Public Transit's Architecture, Elizabeth M. Nielsen

Architecture Masters of Science Program: Theses

Public spaces are the foundation of our social health and wellbeing, but are often designed without considering the needs of the public, creating spaces that people do not feel encouraged to use. Just as public space design as a whole often falls short of serving the public, the same can be said for a subset of public space design, public transit stops. While they are public spaces created for the purpose of waiting, their design rarely reflects this.

Well-designed public transit stops are capable of both maintaining existing ridership and drawing in new riders. Most commonly, this design occurs at …

How A Garden Hoe Changed My Literacy Life: A Story Of Teaching, Coaching, And Becoming, Kelsey J. Walker

Department of Teaching, Learning, and Teacher Education: Theses and Other Student Research

In this dissertation, I explore how personal practical experiences teaching reading intervention impacted my own understanding of the role of a secondary literacy coach. Drawing on the concepts of dialogism and adult learning theory, I leveraged learning conversations to grow my own body of knowledge. The methodology of this study was done using narrative inquiry and autoethnography. This methodological blend allowed me to closely study myself as the primary participant with a unique positionality as a scholarly practitioner. I unpack the complexities, contradictions, and tensions of my lived experience through stories and vignettes set in a rural midwestern public school …

Mediated Dwelling: Reconstructing The Contemporary Home Space, Nicholas Carraher

Masters in Architecture Program: Theses

As online social media platforms become dominant areas for self-expression, professional opportunity, and cultural exchange, the role of typical residential architecture in contemporary society is changing to meet the demands of this visually driven and performative culture. Social media’s emphasis on aesthetic appeal, shareability, and curated authenticity challenges traditional architectural paradigms that prioritize functionality, spatial quality, and privacy. This change coincides with the broader Western cultural shift in ideals and social dynamics of the contemporary user. The home space, a once-private refuge, has been redefined in the age of online social media, where physical space is endlessly curated to align …