Digital Commons Network^™

Local Rural Knowledge And Early Childhood Informal Science Education In Rural Nebraska, Sarah Michelle Paulos

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

This study aims to discover the existing experiences that lead to local rural knowledge (LRK) of specific rural Northeast Nebraska communities. This information will assist in understanding the impact that LRK has on young children’s science knowledge in rural communities. By engaging in hands-on experiences and interactions, science learning goals for children may be achieved and developed through science outreach programs. During Phase 1 of this study, adults in the selected rural communities participated in an online survey indicating their knowledge of various common rural phrases with the option to share personal stories of experiences and family history. This information …

Characterization Of The Final Enzyme In The Coenzyme M Biosynthesis Pathway In Methanosarcina, Connor John Hines

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

Methanogenesis is known to be one of the oldest forms of energy generation on our planet. Methanogens rely on this method of energy conservation and have evolved to metabolize a variety of substrates, including the waste products of other organisms. This feature has made methanogens beneficial to both wastewater treatment and landfill-to-energy projects. Methane itself is a greenhouse gas twenty times more potent than carbon dioxide, viewed as a particularly influential contributor to global greenhouse emissions. Climate change was known to be on the horizon throughout the 20^th century but has made itself known vocally during this 21^{st …}

Variable Selection In Distance Metric Learning And Triplet Constraints For Deep Learning Based Ordinal Classification, James D. Clothier

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

The purpose of this research is to augment linear and kernelized ordinal distance metric learning (L/KODML) techniques with a proposed variable selection methodology that integrates the Sequential Multi-Response Feature Selection (SMuRFS) algorithm. Additionally, we aim to embed ordinal triplet constraints into a deep learning architecture, and to propose a general framework for deep learning-based ordinal classification. A variety of simulation studies and real data experiments were conducted to evaluate the various methodologies. For the distance metric learning and variable selection, results showed that the integration of SMuRFS performed effective variable selection and improved prediction accuracy. For the triplet constraints, incorporating …

Novel Mouse Models To Study The Role Of T Cells In Cardiac Autoimmunity, Meghna Sur

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

Myocarditis patients can chronically develop dilated cardiomyopathy and autoreactive T cells could contribute to the disease pathogenesis, but defining their antigen specificity remains a major challenge. To fill this gap, we generated T cell receptor (TCR) transgenic (Tg) mice specific to cardiac myosin heavy chain (Myhc)-α 334–352 and made a few observations. First, we unexpectedly noted both CD4 and CD8 T cells expressing TCRs specific to Myhc-α 334–352. Second, while Tg T cells from myocarditis-resistant C57BL/6J mice did not respond to Myhc-α 334–352, those from immunized mice responded, indicating that in vivo priming is necessary to break tolerance. Third, upon …

Performance Of Acoustic Telemetry And Space Use Of Pallid Sturgeon In The Lower Platte River, Nebraska, Christopher F. Pullano

School of Natural Resources: Dissertations, Theses, and Student Research

Pallid Sturgeon (Scaphirhynchus albus) are centenarian, potamodromous, rheophiles that historically occupied the Missouri River and Mississippi River basins. Listed on the U.S. Endangered Species Act in 1990, population declines are attributed to habitat fragmentation and degradation, as well as overharvest, and hybridization. A knowledge gap exists regarding the extent to which tributaries facilitate key life stages for Pallid Sturgeon. This study evaluated the capacity of acoustic telemetry to monitor the movements of Pallid Sturgeon in a shallow, braided tributary to the Missouri River. The specific objectives were to (1) evaluate the environmental variables influencing the performance of acoustic …

Occupancy Of Fish Species Of Greatest Conservation Need And Temporal Patterns Of Assemblage Occurrence In Sandhills Ecoregion, Nebraska Streams, Braxton M. Newkirk

School of Natural Resources: Dissertations, Theses, and Student Research

Fish species’ occurrence is influenced by environmental conditions across multiple spatial and temporal scales. Alteration to stream systems has the potential to affect occurrence patterns of fish species. Stream systems of the North American Great Plains face threats originating from climate change and anthropogenic activities resulting in negative implications for many fish species. The Sandhills Ecoregion, Nebraska is considered one of the largest intact grasslands in North America, and thus may experience fewer threats than surrounding areas. Stream systems of the Sandhills Ecoregion are home to 12 fish species of greatest conservation need (SGCN). Little context exists regarding the environmental …

Spatial Ecology Of American Bison On Vermejo Park Ranch, New Mexico, Kate Ann Asmus

School of Natural Resources: Dissertations, Theses, and Student Research

American bison (Bison bison) are a keystone species that impact grassland productivity, plant diversity, and landscape heterogeneity. We used GPS telemetry and a replicate herbivore grazing experiment on Vermejo Park Ranch in northeastern New Mexico to advance understanding of bison spatial ecology and grazing dynamics. First, we evaluated the potentially disparate influences of forage productivity and site fidelity on the size and selection of home ranges of bison. Home range size was strongly negatively influenced by forage productivity. However, home range selection was influenced more strongly by site fidelity than spatial variation in forage, as bison selected home …

Growing Industry-University Partnerships: Virtual Workshop On Industry Sponsored Research, Mark Stone, Santosh K. Pitla

Department of Agricultural and Biological Systems Engineering: Presentations and White Papers

The Department of Biological Systems Engineering (BSE) at the University of Nebraska-Lincoln (UNL) hosted a virtual workshop on developing capacity for industry-sponsored research (ISR). This dynamic event brought together faculty, researchers, industry leaders, and students to explore innovative strategies for advancing ISR.

The workshop addressed four key themes: (1) fostering sustainable industry-academic partnerships; (2) tackling intellectual property (IP) challenges; (3) building institutional and individual capacity for ISR, and (4) empowering students as critical contributors to industry research. Through expert-led presentations, an engaging panel discussion, and interactive brainstorming sessions, participants identified actionable steps and articulated a vision for the future of …

Gamma Sigma Delta, Nebraska Chapter Newsletter, Issue #66 December 2024

Gamma Sigma Delta, Nebraska Chapter: Newsletters

Nominations Solicitations Issue

President's Message, John R. Ruberson

Members

Grad Student Award

Teaching Award

Research Award

Extension Award

Award of Merit

Annual Membership Info

Student Award Fund

In Memoriam: John L. Lambert (April 25, 1942-July 3, 2024), Larry Elmer Germer (April 24, 1941-October 25, 2024), Leo Lucas (1931-November 13, 2024)

Pledge

Relationship Between Host Genomics And Microbiomics In Beef Cattle, Andrew D. Lakamp

Department of Animal Science: Dissertations, Theses, and Student Research

As sequencing technology becomes more affordable and throughput increases, microbiome information is becoming more readily available. For beef cattle selection, microbial information has a variety of uses including being a target for genetic prediction or used as a means to explicitly describe additional phenotypic variability in other traits.

Infectious bovine keratoconjunctivitis (IBK), commonly known as pinkeye, is a disease that infects the ocular surface and surrounding tissue which is an animal health and producer economic concern. Vaccinations have shown to have variable effectiveness, while limited genetics studies have suggested that direct genetic selection for resistance would be slow. Therefore, an …

Impacts Of Annual Forage Management On Grazing Cattle Performance And Carrying Capacity, Shelby Davies Jenkins

Department of Animal Science: Dissertations, Theses, and Student Research

Rapid conversion of historical grasslands to cropland in recent history has led to limited perennial pasture availability and an increase in cost of pasture rent. Annual forages are an alternative grazing source. Many annual forages can grow and accumulate stockpile following summer harvest of wheat. Strip grazing is often suggested to increase grazing efficiency of stockpiled forages. To evaluate this, a stockpiled mixture of annual forages were either strip grazed or grazed continuously in the fall and winter. The mixture contained oats and rapeseed in the first year and a diverse warm season annual mixture in the second. Strip grazing …

Exploring Variably Saturated Flow Formulations For Modflow: Implementing A Fully 3d Richards' Equation In Modflow 6, Sebastian Vazquez-Gasty

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

This thesis explores the implementation of a fully 3D Richards’ equation solution into MODFLOW 6 to solve for saturated/unsaturated flow. Currently, MODFLOW 6 has limited capability for solving unsaturated zone flow problems by using the Unsaturated Zone Flow (UZF) package, which neglects capillarity and assumes vertical 1-dimensional flow. Various formulations of the Richards’ equation were first evaluated for their strengths and weaknesses. Various numerical solution approaches to Richards’ equation were also studied to understand the robustness and efficiency of different approaches and to select one that would best fit into the MODFLOW 6 framework. The MODFLOW 6 framework was also …

Argument Schema Of Undergraduate Engineering Students, Anu Singh

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

Critical thinking is one of the most desired skills in the workplace, as it assists an individual in solving complex problems and making informed decisions, resulting in their workplace success. Argumentation is one instructional approach that provides students an opportunity to engage in higher-order thinking and improve their communication skills. Argumentative writing provides opportunities to engage in multiple perspectives of a problem, provide evidence for the claim, evaluate evidence, engage in reasoning, and acknowledge self-bias, which automatically engages students in critical thinking. Previous literature has shown that despite the use of interventions and scaffolding approaches, students' argumentative texts lack elements …

Increasing The Impact Of Dietary Fiber From Grains On Human Health Through Gut Microbiome, Sujun Liu

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

The relationship between dietary fiber intake and human health has gained significant attention due to its potential in preventing chronic diseases and promoting gut health. Grains are a primary source of dietary fiber; however, the health impact of grain fibers is often limited because they are incompletely metabolized by gut bacteria. This dissertation explores innovative strategies to enhance the concentration and of dietary fiber from grains and its utilization by gut bacteria. By investigating various treatments, this research aims to maximize the health benefits of grain-derived dietary fibers, thereby contributing to a healthier society.

This dissertation is organized into four …

Finding Them Before They Find Us: Solving The Emerging Infectious Disease Crisis, Daniel R. Brooks

MANTER: Journal of Parasite Biodiversity

The human population grows daily, it’s on the move, and it’s carving a deep technological footprint on our planet. We alter landscapes and perturb ecosystems, inserting ourselves and other species into novel regions of the world, leading to potentially irreversible changes in the biosphere. This is not news. More than 75 years ago, Charles Elton, one of the founders of modern ecology, wrote, “We must make no mistake; we are seeing one of the greatest historical convulsions in the world’s fauna and flora.” We are also in the midst of a public health and epidemiological crisis. Climate change alters movements …

First Records Of The Spider Wasp Entypus Ochrocerus Dahlbom (Hymenoptera: Pompilidae: Pepsinae) From The Continental United States, Jamaica, And The Bahamas, Frank E. Kurczewski, Rick C. West, Dionne Newell, Scott Johnson

Insecta Mundi

A small population of Entypus ochrocerus Dahlbom, a predominantly Greater Antilles spider wasp (Hymenoptera: Pompilidae: Pepsinae), is reported for the first time from the continental United States based on photographs and associated information from iNaturalist.org. The species was initially misidentified online as E. unifasciatus unifasciatus (Say) or Entypus sp. However, Entypus u. unifasciatus individuals from east of the 100th Meridian in the United States typically have melanochromatic (dark) wings with a subapical xanthochromatic (orange-amber) patch. Entypus ochrocerus from Miami-Dade County, Florida is differentiated from E. u. unifasciatus by its black body with dark greenish blue reflections …

First Record Of The Mexican-M Hairstreak Parrhasius Moctezuma (Clench, 1971) (Lepidoptera: Lycaenidae) In Texas, Usa, And Possible Sighting Of The Tequila Giant Skipper Aegiale Hesperiaris (Walker, 1856) (Lepidoptera: Hesperiidae), Sajan Kc, Anisha Sapkota

Insecta Mundi

We report two significant butterfly sightings in the United States, observed during an opportunistic photographic survey conducted in south Texas between December 2022 and January 2023. Parrhasius moctezuma (Clench, 1971) (Lepidoptera: Lycaenidae) was sighted at the National Butterfly Center in Mission, Texas on January 5, 2023, marking the first documented record of the species in Texas and only the second in the United States, as confirmed by photographic evidence. Additionally, Aegiale hesperiaris (Walker, 1856) (Lepidoptera: Hesperiidae) was potentially observed at the same location on December 4, 2022, although lacking photographic documentation or a collected specimen, highlighting the need for further …

The Puzzling Distribution Of Platphalonidia Aenigmana, New Species, From The Western U. S. A. And Colombia (Lepidoptera: Tortricidae: Cochylina), John W. Brown

Insecta Mundi

Platphalonidia aenigmana Brown, new species (Lepidoptera: Tortricidae), is described and illustrated from Arizona, California, and Oregon, U. S. A. and Colombia, South America. The new species has been reared on numerous occasions from Garrya elliptica Dougl. ex Lindl. (Garryaceae) in northern California and Oregon, once on Arctostaphylos sp. (Ericaceae) in southern California, and once on Gomphrena globosa L. (Amaranthaceae) in Colombia. Various hypotheses are explored to explain the unusual disjunct geographic distribution of the species. In addition, Phalonidia bassii Razowski (Tortricidae) is transferred to Saphenista Walsingham, resulting in Saphenista bassii (Razowski, 1999), new combination.

A New Species Of Cymatodera Gray (Coleoptera: Cleridae) From Central Arizona, Jacques Rifkind

Insecta Mundi

Cymatodera campbelli, new species (Coleoptera: Cleridae), is described from central Arizona, United States. Though superficially similar to several other small species of Southwestern Cymatodera Gray that are commonly collected at lights, this apparently rare species has distinctive coloration and surface sculpturing. Its discovery suggests that systematic collecting even in areas that have historically attracted entomological attention may still yield additions to our fauna.

New Country Records For Macroscython Granulosus Otto, 2016 (Coleoptera: Eucnemidae: Dromaeolinae: Dromaeolini), With Redescription Of The Female, Robert L. Otto, Jiří Háva

Insecta Mundi

New country records for Macroscython granulosus Otto, 2016 (Coleoptera: Eucnemidae: Dromaeolinae: Dromaeolini), a eucnemid known only from Laos and Thailand, are reported from China and Nepal. A redescription and images of the female are provided.

Genomic Analysis Reveals Hidden Species Diversity In Emesis Fabricius (Lepidoptera: Riodinidae), Jing Zhang, Qian Cong, Jinhui Shen, Leina Song, Nick V. Grishin

Insecta Mundi

Genomic analysis of Emesis [Fabricius], 1807 (Lepidoptera: Riodinidae Grote, 1895) reveals species richness higher than anticipated. As a result, one subgenus, 22 species, and one subspecies are proposed as new (type species or type localities in parenthesis): Diogenia Grishin, new subgenus (Emesis diogenia Prittwitz, 1865), Emesis (Emesis) aerunda Grishin, new species (Peru: Rio Pachitea, Monte Alegre), Emesis (Emesis) bartica Grishin, new species (Guyana: Cuyuni-Mazaruni), Emesis (Emesis) fatimellina Grishin, new species (Brazil: Santa Catarina), Emesis (Emesis) panamella Grishin, new species (Panama: Darién), Emesis (Mandania) mandora Grishin, new species (Ecuador: …

Review Of Nealyda Dietz (Lepidoptera: Gelechiidae: Apatetrinae) With Description Of A New Species From The Florida Keys, Sidney V. Bennett, James E. Hayden

Insecta Mundi

Nealyda grandipinella Bennett and Hayden, new species, is described from Big Pine Key, Florida, USA. Photographs of the adult and of male and female genitalia are provided for N. grandipinella and its congeners within the state of Florida. Nealyda Dietz (Lepidoptera: Gelechiidae) is provisionally transferred from Anomologinae to Apatetrinae based on characters of the genitalia. The homology and terminology of the processes arising from the vinculum of gelechiid genitalia are explored. The potential host plant of the new species is discussed, along with other undescribed species of Nealyda.

First Record Of The Camphor Shot Borer, Cnestus Mutilatus (Blandford) (Coleoptera: Curculionidae: Scolytinae), In Massachusetts, Lawrence E. Barringer

Insecta Mundi

Cnestus mutilatus (Blandford) (Coleoptera: Curculionidae: Scolytinae) is reported from Massachusetts, United States for the first time. Brief trapping information is provided.

Student Comprehension Of Biochemistry In A Flipped Classroom Format, Ed Harris, Evan A. Schroder, Teryn J. Berks

Department of Biochemistry: Faculty Publications

Concept-heavy courses such as Biochemistry in life and physical science curricula are challenging for many college-aged students. It is easy for students to disengage in a lecture and not learn the subject matter while in class. To improve student learning and participation, we employed a flipped format for the first half of the course and compared learning outcomes and attitudes with the traditional lecture in the second half of the course. The experimental course was an upper-level biochemistry course taken primarily by juniors (49%), seniors (40%), and some graduate students (10%) at the college level. Our results indicate that lower-performing …

Broad-Spectrum Resistance To Fungal Foliar Diseases In Wheat: Recent Efforts And Achievements, Amira M.I. Mourad, Asmaa A.M. Ahmed, P. Stephen Baenziger, Andreas Börner, Ahmed Sallam

Department of Agronomy and Horticulture: Faculty Publications

Wheat (Triticum spp.) is one of the most important cereal crops in the world. Several diseases affect wheat production and can cause 20-80% yield loss annually. Out of these diseases, stripe rust, also known as yellow rust (Puccinia striiformis f. sp. tritici), stem rust (Puccinia graminis f. sp. tritici), leaf rust (Puccinia recondita), and powdery mildew (Blumeria graminis f. sp. tritici) are the most important fungal diseases that infect the foliar part of the plant. Many efforts were made to improve wheat resistance to these diseases. Due to the continuous advancement in …

Disentangling Genotype And Environment Specific Latent Features For Improved Trait Prediction Using A Compositional Autoencoder, Anirudha Powadi, Talukder Zaki Jubery, Michael C. Tross, James C. Schnable, Baskar Ganapathysubramanian

Department of Agronomy and Horticulture: Faculty Publications

In plant breeding and genetics, predictive models traditionally rely on compact representations of high-dimensional data, often using methods like Principal Component Analysis (PCA) and, more recently, Autoencoders (AE). However, these methods do not separate genotype-specific and environment-specific features, limiting their ability to accurately predict traits influenced by both genetic and environmental factors. We hypothesize that disentangling these representations into genotype-specific and environment-specific components can enhance predictive models. To test this, we developed a compositional autoencoder (CAE) that decomposes high-dimensional data into distinct genotype-specific and environment-specific latent features. Our CAE framework employed a hierarchical architecture within an autoencoder to effectively separate …

Industrial Hemp Biomass Negatively Affected By Herbicide Drift From Corn And Soybean Herbicides, Milos Zaric, Bruno Canella Vieira, Barbara Houston, Guilherme Sousa Alves, Samuel E. Wortman, Julie A. Peterson, Greg R. Kruger

Department of Agronomy and Horticulture: Faculty Publications

The establishment of industrial hemp (Cannabis sativa L.) fields near row crops has raised concerns about the potential adverse effects of herbicide drift on hemp production. This study examined hemp susceptibility to drift of herbicides registered for use in corn and/or soybeans. Herbicide solutions (2,4-D, dicamba, glufosinate, glyphosate, imazethapyr, lactofen, mesotrione) were applied separately in the wind tunnel (3.6 m s⁻¹ airspeed), simulating drift scenarios, with conventional TP95015EVS (TP) and air inclusion AI95015EVS (AI) flat fan nozzles calibrated to deliver 140 L ha⁻¹ carrier volume at 230 kPa. Mylar cards and hemp plants (20–25 cm tall) were placed …

Alabama Agricultural Producers’ Experiences With Wild Pigs (Sus Scrofa) And Their Preferences Concerning Wild Pig Management, Hailey E. Ellis, Luren M. Jaebker, Alan D. Bright, Mark D. Smith, Keith M. Carlisle

United States Department of Agriculture Wildlife Services: Staff Publications

Government agencies and landowners use a variety of lethal methods to reduce invasive wild pig populations and resulting agricultural damages. To provide decision-makers with information regarding Alabama farmers’ experiences with wild pigs and their preferences for management actions, we surveyed Alabama Farmers Federation members in 2020. We found that wild pigs were commonly present on livestock, timber, and crop production acreage, but wild pig damages and costs were much more common among crop producers. Respondents' wildlife acceptance capacity for wild pigs was low and all lethal control methods were considered aceptable by most reposndents, particularly those performed by landowners. While …

Editorial: Leveraging Multi-Omics Approaches To Understand And Manage Gastrointestinal And Hepatic Diseases, Isis Trujillo-Gonzalez, Paul G. Thomes, Isin Tuna Sakallioglu, Kusum K. Kharbanda

Department of Chemistry: Faculty Publications

The Research Topic “Leveraging multi-omics approaches to understand and manage gastrointestinal and hepatic diseases” proposed by the Frontiers in Pharmacology has attracted a total of four articles on preclinical studies that were covered in three original research manuscripts and one review article. Two research articles were on metabolic dysfunction-associated steatotic liver disease (MASLD), previously named non-alcoholic fatty liver disease (NAFLD), which is now recognized as a predominant cause of chronic liver disease worldwide, affecting over 30% of the adult population (Teng et al., 2023; Miao et al., 2024). Current pharmacological treatments for MASLD are limited and, until a recent FDA-approved …

Feasibility Of Technical Solutions For The Detection Of Falsified Images In Research, Phill Jones, Hylke Koers

Copyright, Fair Use, Scholarly Communication, etc.

In this report, we discuss the findings of an investigation into the feasibility of developing a research image integrity system. The focus was primarily on immunohistochemistry blots and microscopy images, although the findings are relevant to other types of research images such as gel blots and spectroscopy, geophysical, or astronomical images, as well as to any digital data type. The investigation comprised a mix of desk research and semi-structured (anonymized) interviews with nine stakeholders representing publishers, researchers, technologists, and microscopy companies.

We found that it would be possible to implement a system to assert image integrity and that the technology …