Digital Commons Network^™

Table Of Contents And Front Matter, Bjur Staff

Butler Journal of Undergraduate Research

No abstract provided.

Autonomous Agricultural Equipment Evaluation For Broad-Acre Crop Production, Sofia Bahmutsky, Ashutosh Singh, Travis A. Burgers, Roy Maki

Mechanical Engineering Faculty Publications

No abstract provided.

Dairy Digest, Legan...Dairy 2024-2025, Department Of Dairy And Food Science

Dairy Digest

This is the 2025 Dairy Club Digest. The Diary Club Digest is published annually by the South Dakota State University Dairy Club.
The Digest contains information and news about the activities and members of the SDSU Dairy Club for the academic year 2023 - 2024.

Examining Sustainable And Regenerative Viticultural Practices In The Rheinhessen Wine Region Of Germany, Claire Hoffmann

CISLA Senior Integrative Projects

No abstract provided.

The Effects Of Incubation Humidity On Broiler Chicks, Claire Caples

Animal Science Undergraduate Honors Theses

Leg health issues are a welfare problem in commercial broiler chickens and an economic issue for the broiler industry. Broilers exhibiting leg abnormalities show altered gait, reduced ability to access resources, and increased lameness incidence. These leg health issues can result from many animal and environmental factors during incubation and post-hatch. Incubation strategies may contribute to the development of leg health issues, and recent research has increased focus on incubation factors affecting embryonic development and health and welfare post-hatch. Thus, the objective of this study was to evaluate the effect of high (80%), low (55%), and ideal (65%) humidity on …

Differences Between Media And Industry Professionals’ Views On Welfare Issues At Equine Racetracks In The United States, Olivia Burris

Honors College Theses

The objective of this project was to see if there was a difference in views between lay publications in the media and industry professionals regarding welfare issues occurring at equine racetracks. This study focused on the issues of drug usage and racing-related injuries in racehorses. This project examined current lay publications versus surveys of industry professionals discussing the specific welfare issues. These lay publications were reviewed and summarized for comparison to the industry professionals’ responses to the survey.

Frontier Healthscapes: Competing Narratives Of Disease, Environment, And Wellbeing In Early Minnesota, Aidan Reynolds

Geography Honors Projects

Across settler societies, health narratives were shaped by evolving tensions between lay and expert knowledge, frameworks of disease causation, and perceptions of the environment as both a source of health and a threat. In the decades following Euro-American settlement (1860-1900), Minnesota became a focal point for these debates, with its landscape fostering complex and competing narratives on health, wellbeing, and disease. This paper explores how public health discourse developed in Minnesota through the perspectives of institutions, the public, and economic interests. Combining environmental history with critical discourse analysis of archival materials, this study examines shifts within the Minnesota State Board …

Using A Process Evaluation In Extension Programming: Takeaways For Teams, Cristina Connolly, Jeantyl Norze, Stacey F. Stearns

Journal of Human Sciences and Extension

Health fields use process evaluations to measure how closely an intervention aligns with its intended delivery. Despite their potential for improving Cooperative Extension programming and impacts, process evaluations are not widely used outside the medical sciences. We adapted the process evaluation framework for Extension use. The components assess project components such as content, dose delivered, dose received, and reach, as well as moderating factors such as quality of delivery, participant responsiveness, complexity, facilitation strategy, recruitment, and context. The modified process evaluation framework was used to assess an Extension project in the Northeast region of the U.S. Extension teams in the …

Growing Pains: Assessing The Strategic Organizational Communication Approaches Of An Expanding Extension Organization, Anissa M. Mattox, Ashley Mcleod-Morin, Lauri Baker, Angela B. Lindsey

Journal of Human Sciences and Extension

As social structures evolve, strategic organizational communication (SOC) must also evolve for organizations to best meet the ever-changing needs of stakeholders. Assessing communications can guide the direction of an organization while also elevating the organization to the next level. For this study, researchers assessed the SOC strategy of the Extension Disaster Education Network (EDEN) through qualitative focus groups. Results of this study revealed internal communication and resources provided by the organization were perceived as positive communication approaches, while external communication and visibility were identified as negative communication approaches. Other Extension organizations could benefit from the results of this research as …

A Comparative Analysis Of Small Nuclear Rna Sequences In Spinacia Oleracea, Arabidopsis Thaliana, And Homo Sapiens, Nhi T. Nguyen

2025 Spring Honors Capstone Projects - Archive

In eukaryotes, the structure and function of the Sm core and its associated small nuclear ribonucleoproteins (snRNPs) play a significant role in pre-mRNA splicing. These snRNPs exhibit a high degree of conservation. While plants also utilize alternative splicing, the conservation of plant snRNAs and other non-coding RNA such as snoRNA and scaRNA, which assemble the Sm core, remains largely unexplored. In this study, plant sequences were compared with human sequences using the multiple sequence alignment program Jalview to determine the conservation of snRNPs in other non-coding RNA. Sequences analysis showed that the Sm site in Spinacia oleracea and Arabidopsis thaliana …

Elucidating The Role Of Transposable Element Derived Gene, Dplg3, In Drosophila Melanogaster, Kaisy A. Martinez

2025 Spring Honors Capstone Projects - Archive

A big fraction of most eukaryotic genomes is comprised of transposable elements (TEs). TEs are mobile genetic sequences often causing deleterious effects as they increase in copy number. On rare occasions, TEs can undergo molecular domestication, where the TE proteins are co-opted by the host to serve cellular functions. In Drosophila melanogaster, domestication from PIF/Harbinger TEs has resulted in five Drosophila PIF-Like Genes (DPLG1-4 and 8). This study focuses on investigating the function of DPLG3. In DPLG3 knock out lines, DPLG3-KO, a fraction of the progeny shows an abnormal gonad phenotype. We sought to confirm …

Uncovering The Evolutionary Origins Of Neo-Sex Chromosomes In The Insect Family Membracidae, Mary Kumah

2025 Spring Honors Capstone Projects - Archive

This research explores the evolution of the neo-XX/XY sex chromosome system of Amblyophallus exaltatus, a treehopper insect in the family Membracidae. Neo-XX/XY sex chromosome systems can evolve from an XX/X0 sex chromosome system via fusion events between the X chromosome and an autosome. Although cytological work has indicated the presence of a neo-XX/XY system within A.exaltatus, the chromosomal identity of the fused autosome and the molecular drivers behind this chromosomal fusion remain poorly understood. By performing a coverage analysis with whole genome sequence data, the parts of the A.exaltatus genome that fused with the X chromosome will be better …

Establishing Methods For In Vitro Static Culture Of Gut Microbiomes For Nutritional Intervention Studies, Jeremy Mathew Case

Undergraduate Honors Capstone Projects

Lipid oxidation products (LOPs), which form during high-heat processing of oils common in Western diets, are known to cause inflammation and cellular damage. While LOPs have been implicated in exacerbating colitis and promoting colon tumorigenesis in mouse models, their direct impact on the gut microbiome remains poorly understood. This capstone project aimed to develop a low-cost in vitro protocol to culture the mouse gut microbiome under anaerobic conditions, enabling future investigations into the direct effects of bioactive dietary compounds such as LOPs. The study also assessed whether viable microbial communities could be recovered from fecal samples stored at -80°C. Fecal …

Adaptation Of Influenza A Virus Strains A/Anhui/1/2013 (H7n9) And A/Shanghai/1/2013 (H7n9) For Development Of Effective Mouse Models, Spencer T. Mullen

Undergraduate Honors Capstone Projects

The emergence of avian Influenza A (H7N9) virus strains in humans poses a significant threat to human health globally due to their pandemic potential, limited human immunity, and lack of virus-specific interventions. This capstone aims to address some of the limitations in antiviral research regarding Influenza A H7N9 virus by adapting two low-pathogenic virus strains A/Anhui/1/2013 (H7N9) and A/Shanghai/1/2013 (H7N9) to BALB/c mice through sequential passaging through lung tissue. Following 12 serial passages, increased virulence was observed as evidenced by increased virus replication, increased weight loss, and increased mortality in infected mice. Titration of the initial non-adapted virus isolates were …

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 …

Investigation Of Immune/Performance Trade-Offs In Neonate Children's Pythons (Antaresia Childreni), Ellie Hartman

Undergraduate Honors Capstone Projects

Energetic costs and constraints are key considerations when analyzing an organism’s life history and may require trade-offs to be made between different life history traits. One of these trade-offs occurs between investment in immunity and performance. The purpose of this study is to discover if this trade-off influences behavior in neonate Children’s pythons (Antaresia childreni). We hypothesize that snakes undergoing an immune response will have reduced behaviors promoting survival. To test this hypothesis, neonate Children’s pythons were randomly assigned to receive an immune challenge of keyhole limpet hemocyanin (KLH) or a vehicle injection as a control. Two days …

Ethical Concerns And Implications Of Expanded Carrier Screening, Emily Andres

Undergraduate Honors Capstone Projects

The rapid evolution in the field of genetics is often met with uncertainty and skepticism. With the advancements in genetic technologies, expanded carrier screening (ECS) has emerged as a powerful tool in reproductive medicine. Traditionally, carrier screening was provided less broadly, often relying on ethnic-based approaches. However, further advancements have deemed this practice no longer equitable or widely accepted. While ECS provides prospective parents with insight into their genetic risk and may prevent severe genetic conditions, it also raises serious ethical questions for many. These concerns span medical, political, and societal facets including medicalization, defining severity, abortion, legislation, insurability, the …

First Specimen-Based Record Of Barbonymus Schwanefeldii (Bleeker, 1854) (Teleostei: Cyprinidae) From Laguna De Bay, Philippines, Kent Elson S. Sorgon, Marjorie Juliana L. Martinez, Andrei Justin F. So, Mariko Franccesca R. Aboganda, Jazreen Nicole G. Parungo, Aeris Johanne G. Poricallan, Keona Tiffany B. Prieto, Mellissa Jewel S. Magday, Alexa Charlize Dc Geronimo, Ma. Vianca Julia E. Anupol, Derreck O. De Leon

Biology Faculty Publications

The introduction of non-native fish species in the freshwater ecosystems of the Philippines presents a clear threat to native ichthyofauna, making verified reports of such introductions all the more critical. Through the examination of a collected specimen and anecdotes from fisherfolk and social media, we present here the first records of the occurrence of the tinfoil barb, Barbonymus schwanefeldii (Bleeker, 1854), in Laguna de Bay, Luzon Island, Philippines. This represents the addition of another non-native fish species in this lake, which is increasingly becoming dominated by non-native and invasive fishes that have been intentionally or accidentally introduced. Monitoring landed fish …

Investigating Fatty Acid Influence On West Nile Virus In Mosquitoes And Birds, Hayley Moree

Honors Program: Senior Projects (Public)

Vector-borne diseases, including Zika virus (ZIKV), Dengue virus (DENV), and West Nile virus (WNV), pose considerable global health threats, accounting for over 400 million infections and more than 700,000 deaths annually. Many vector-borne diseases are within the Flaviviridae family. Despite this, effective treatments have not been found for some flaviviruses. Flaviviruses exploit host cellular machinery to facilitate their replication and survival, reprogramming metabolic pathways, including lipid metabolism. Lipids play essential roles in the viral life cycle, providing structural components for the viral envelope, enabling membrane rearrangements for replication complexes, and supplying energy resources necessary for particle assembly.

Targeting lipid metabolism …

Novel Chloroviruses With Unique Glycans On Their Major Capsid Proteins, Cayden J. Homolka

Honors Program: Senior Projects (Public)

Chloroviruses, of the family Phycodnaviridae, are large, dsDNA viruses with a genome of 290 to 410 kb. These virus genomes are so large that they are classified as “giant viruses”. Within this genome, up to 16 tRNAs and 330 to 450 proteins are encoded. Among the massive amounts of genes and proteins are unique carbohydrate synthesis/metabolism genes, which are responsible for the glycosylation of chloroviruses major capsid proteins. In most viruses, these proteins are glycosylated by the host enzymes located in the endoplasmic reticulum. Instead, Chloroviruses encode their own glycosylation machinery; essentially decorating themselves. Furthermore, these chlorovirus glycans are unlike …

The Great Animal Rights Debate: From The Past Into The Present, Dayna Wiley

Celebrating Scholarship and Creativity Day (2018-)

Animal rights are not a novel concept, and everyone has their own beliefs about where animals should fit into the hierarchy of life. Not so different from today, a debate occurred in the ancient world between the Stoics, represented by Aristotle, and Plutarch, with each questioning whether animals are capable of rational thought or feelings, and therefore whether they are deserving of justice. There is much to learn from the ancient world about the modern debate on animal rights, and there is a striking comparison between this ancient debate and the modern questions of animal rights. But how similar are …

Pathways Of Nitrogen Loss After Fertilization In Dryland Ecosystems, Fidel Manuel Renteria

Open Access Theses & Dissertations

Dryland ecosystems cover approximately 41% of the Earth’s terrestrial surface, and are characterized by limited moisture, nutrient-poor soils, and pulsed precipitation regimes that collectively constrain nutrient cycling. Although nitrogen (N) is often assumed to be a primary limiting nutrient in these environments, fertilization studies frequently reveal minimal biotic response to added N—a pattern known as the "dryland nitrogen paradox." This paradox has been attributed to rapid nitrogen loss via gaseous emissions and leaching, exacerbated by interactions with water and phosphorus (P) availability. To investigate these loss pathways, we conducted a field experiment at the Jornada Experimental Range in the northern …

Navigating The Challenges Of Coccidioides Surveillance: Insights From The Environment Of El Paso County, Texas, Tanzir Hossain

Open Access Theses & Dissertations

Coccidioidomycosis, or Valley fever, is a fungal infection resulting from the inhalation of spores from the Coccidioides species (C. immitis and C. posadasii), native to arid areas of the Western Hemisphere. Coccidioidomycosis presents considerable health hazards and can be fatal. It affects between 206,000 and 360,000 individuals annually, leading to 700 to 1,100 fatalities in the United States alone. In response to these issues, extensive research has concentrated on therapeutic goals for this infectious disease. Nonetheless, more limited research has focused on the environmental detection of its causative fungi, which is crucial for forecasting treatment needs and formulating preventive strategies. …

Understanding The Impact Of Fall Armyworm (Spodoptera Frugiperda) Feeding, And Drought Stress On Drought-Tolerant And Drought-Resistant Soybean (Glycine Max)., Adriana G. Peissel

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Drought and insect herbivory are two major stressors on high-value crops like soybean (Glycine max). However, few studies have explored how these stressors interact, despite their presence in tandem under field conditions. We investigated how drought stress and fall armyworm (Spodoptera frugiperda) caterpillar herbivory impact Magellan (drought-tolerant) and Blackhawk (drought-susceptible) soybean cultivars. The soybean plants were subject to four treatment groups (1. Drought 2. Herbivory 3. Drought + Herbivory 4. Well-Watered) during a treatment period of 7 days in a greenhouse. We then measured plant height, physiological traits, trichome density, soil moisture, and larval mass gain. …

Understanding Factors That Drive Wildlife Mortality During Prescribed Fire Management Of Prairie Restorations, Hunter M. Griffey

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Fire is a key ecological disturbance, which plays a vital role in maintaining biodiversity and early successional species. For today’s land managers, prescribed fire is key in the restoration and maintenance of prairie ecosystems, halting woody encroachment and creating habitat desperately needed by many species. However, fire may have unintended effects on wildlife populations through direct mortality. Among taxa living in fire-dependent ecosystems, reptiles are predisposed to direct mortality, and several studies have recorded significant mortality during prescribed burns. However, the few studies investigating reptile mortality in prescribed fire are limited by small sample sizes and generally have limited analysis …

Toward The Application Of Natural Language Processing In Electronic Health Record Analysis For Taxonomy Development, Latoya Mcdonald

All Dissertations

Electronic health records (EHRs) are pivotal resources for nurse practice because they increase the timeliness and reliability of patient information at the point of care and support access by multiple healthcare providers and the individual patients themselves. However, it is widely recognized that data extraction from EHRs is challenging due to the variability in the language used in clinical care notes and the lack of standardized terminology across healthcare systems. The broad objective of this dissertation is to develop taxonomy-based classification models for nursing care by applying feature engineering approaches to EHRs that include nursing care of ostomy patients following …

Perspectives On Clinical Oncogenomics: Secondary Germline Variants Associated With Tumor Genomic Profiling In Community Cancer Care And Advanced Practitioner Oncogenomic Proficiency, Sarah Moncado

All Dissertations

Precision medicine in oncology is defined by the sequencing of tumor genomic variants that can be used to identify targeted treatment for patients. Secondary pathogenic and likely pathogenic germline variants (P/LPGVs) can incidentally be detected on tumor genomic profiling (TGP). With the rise in precision medicine over the past 15 years, secondary P/LPGVs on TGP have been an increasingly important clinical issue. However, there are factors that can lead to misidentification and underreporting of P/LPGVs. Germane to this clinical practice issue is healthcare provider oncogenomic literacy and proficiency.

A scoping review was conducted to evaluate the variability of the prevalence …

A System And Method For Measuring Spatially Varying Surface Appearances With A Study Of Feathers, Jessica Baron-Lis

All Dissertations

Real-world materials, particularly biological structures such as feathers exhibit complex appearances that vary spatially across their surfaces. The field of computer graphics provides a means of understanding such surfaces through material modeling which uses both analytical models and data acquired from light-surface interactions. There are many efforts within the past decade in measuring materials for graphics, but common limitations in these works include not accounting for spatially varying properties and reliance on neural networks and synthetic datasets.

Feathers from modern birds present diverse appearances due to how light interacts with their unique hierarchical microstructures. Variations in those structures lead to …

A Comprehensive Literature Review Of Barriers To Hormone Therapy Utilization: Strategies For Improving Menopause Management In Women Aged 40-60, Suhan Lee

Capstone Experience: Master of Public Health

Menopause is a natural transition marked by the cessation of ovarian activity, often accompanied by vasomotor symptoms (VMS), genitourinary syndrome of menopause (GSM), and psychological changes that significantly impact women’s quality of life. Hormone therapy (HT) has been the primary treatment for managing menopausal symptoms, particularly VMS, providing substantial relief when initiated within 10 years of menopause. Despite its effectiveness, HT usage has declined dramatically over the past two decades primarily due to barriers such as stigma, safety, misinformation, provider hesitancy, financial barriers, and cultural beliefs. This comprehensive literature review explores key factors influencing HT decision-making, including the media’s role …

Identifying Novel Molecular Targets To Induce Ferroptosis In Drug-Tolerant Cancer Cells Through Computational Modeling, Haris J. Rana

Biological Sciences Undergraduate Honors Theses

Ferroptosis is an iron-dependent, reactive oxygen species (ROS)-driven form of regulated cell death in which the cell membrane is degraded by lipid peroxidation. It is regulated by multiple enzymes, such as glutathione peroxidase 4 (GPX4), which prevents membrane degradation by reducing lipid peroxides and protecting cells from oxidative damage. When inhibitors like RSL3 target GPX4, lipid peroxides build up, and toxic ROS compromises membrane integrity. Traditional anticancer treatments, such as most chemotherapies, aim to eliminate tumor cells by damaging DNA and triggering apoptosis. However, resistance to apoptosis is a “hallmark of cancer,” often resulting in treatment failure. As a distinct …