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Comparisons Of Zooplankton Communities Before And After Chemical Renovation In Lake Ogallala, Nebraska, Theo Huber, Melissa Wuellner, Alexandria Keiler-Klein, Alexander D. Engel, Keith D. Koupal

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Rotenone is commonly used to remove undesirable fish species and support recreational fisheries. Lake Ogallala, a 263-ha tailwater reservoir located in western Nebraska, has had a history with rotenone use dating back to 1969. While past renovations of the reservoir have documented impacts on water quality, aquatic vegetation establishment, and benthic invertebrate and fish communities, zooplankton responses had not been studied. To evaluate potential effects, we compared zooplankton densities and community composition before and after the most recent renovation. Monthly samples were collected from April – September in 2023 (pre-renovation) and 2024 (post-renovation) using an 80-μm circular plankton net at …

From Prometheus To Pygmalion To Pandora: Teaching Greek Mythology With Frankenstein’S “Dark Brides”, Kyle William Bishop

Dialogue: The Interdisciplinary Journal of Popular Culture and Pedagogy

As Mary Shelley unambiguously informs readers on the title page of her 1818 novel Frankenstein, her tale of Victor’s discovery of the secret of non-biological reproduction represents the Promethean myth, a morality tale warning against the usurpation of divine authority. In Shelley’s novel, Victor ultimately recognizes the dangerous path he has discovered, and he refuses to create a female companion for his hideous progeny, risking his own life to protect the world from a potential race of monsters. In the cinematic tradition, however, this unrealized “bride” often has been created, and these fantastic narratives realize the Pygmalion myth, that …

A Comprehensive Study Of Crash Severity And Its Contributing Factors, Seyedmahyar Madarshahian

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

This dissertation presents a comprehensive analysis of factors influencing crash injury severity across diverse road and work zone environments. Using advanced statistical modeling techniques, it examines crash outcomes in four critical contexts: general road crashes, work zone crashes, truck-involved crashes, and high-speed rear-end collisions. A mixed logit modeling framework with random parameters, incorporating heterogeneity in parameter means and variances, is employed to capture unobserved heterogeneity in crash data. The analyses are further refined through targeted segmentation by speed regime, work zone type, and crash type to identify context-specific risk factors. In addition, a fuzzy cluster analysis is utilized to discern …

Stonex Commodity Solutions Strategic Analysis Podcast, Zachary J. Johnson

Honors Program: Senior Projects (Public)

This project comprises two separate podcast episodes that analyze the environment in which StoneX Commodity Solutions, a physical commodity trading firm, operates and provide strategic recommendations for the company. These episodes are informed via interviews with multiple StoneX Commodity Solutions employees. The first episode provides an evaluation of the company by examining its external and internal environments using tools such as PESTEL analysis and Porter’s Five Forces. Building on this, the episode discusses several of the company's strategic objectives and the current competitive advantages it has gained as a result of these objectives.

Expanding upon the information discussed in the …

Interview With Orca Award Winner John J. Janovy, Jr., Unl Biological Sciences; Parasitologist And Author, Mark Griep, John J. Janovy Jr.

UNL ORCA Interview Series

Professor John Janovy, Jr., was awarded the ORCA in 1998. John was born in Louisiana, but his family moved to Oklahoma, where he grew up in Tulsa and then Oklahoma City. Something in his youth must have sparked an interest in science because he earned three degrees from the University of Oklahoma in Norman: a bachelor of science in math in 1959, a master of science in zoology in 1962, and doctoral degree in zoology in 1965. Next, he ventured 1400 miles east to Rutgers University in New Brunswick, New Jersey, where he did post-doctoral work for about a year. …

An Updated Annotated Checklist Of The Mammals Of The Crane Trust, Hall County, Nebraska, Bethany L. Ostrom, Amanda H. Medaries, Andrew J. Caven, Jenna M. Malzahn, Alexa Rojas, Matthew R. Schaaf, David M. Baasch, Thomas E. Labedz, Greg D. Wright

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

The Crane Trust is a regional nonprofit conservation organization that has protected land in the biologically important Central Platte River Valley for over four decades. A mammal inventory was conducted on the Crane Trust’s main habitat complex in 1980. Since, a variety of environmental conditions have shifted locally, regionally, and globally. An analysis of the mammal community was conducted using past and recent data to determine how species composition and relative abundance have shifted categorically from 1980 to 2021. We used all available data to categorize relative abundance during two distinct time periods per a modified “DAFOR” scale including 7 …

Pymelt-Px: A Python Script For Modeling Melting Of A Pyroxenite-Peridotite Bilithological Mantle, Ana L. Jimenez Bustos

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

The study of oceanic crust formation is a fundamental building block in our understanding of the processes of planetary formation, necessitating an understanding of the melt generation processes that help form oceanic crust. To aid in this purpose, we present pyMeltPX: a bilithological pyroxenite-peridotite mantle modeling script. Although the mantle is primarily comprised of peridotite, pyroxenite is a minor but ubiquitous feature of the mantle and can contribute a disproportionate amount of melt to crustal generation in mid-ocean ridge and ocean island basalt settings. Our model, pyMeltPX, is a python coded, extensible tool based on the Excel calculator by Lambart …

Interview With Orca Award Winner Karen Kunc, Unl Art; Abstract Print Artist, Mark Griep, Karen Kunc

UNL ORCA Interview Series

Emeritus Prof. Karen Kunc the Outstanding Research and Creative Activities Award in 1998. She was born in Ralston, Nebraska, in the Omaha Metro Area. Something in her youth must have sparked an interest in art because she earned her bachelor of fine arts degree from the University of Nebraska-Lincoln in 1975. Next, she ventured 800 miles east to Ohio State University in Columbus, where she earned a master of fine arts. For the next six years, she enhanced her teaching credentials as a printmaking instructor at the Columbus College of Art & Design. From there, she joined the University of …

Modeling The Greenland-Iceland-Faroe Ridge Using Integrated Geophysical Analysis, Zachary Clowdus

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

The Greenland-Iceland-Faroe Ridge (GIFR) is an area of significant geologic interest with anomalously thick crust related to enhanced melt generation from the interaction between the Mid-Atlantic Ridge and the Iceland hotspot. To the northeast of Iceland lies the Jan Mayen Microcontinent (JMMC), which is a continental fragment separated from Greenland during the opening of the Northern Atlantic. The overall extent of the JMMC, especially its southern boundary, remains poorly constrained. The crust beneath the GIFR is believed to be primarily of oceanic affinity. However, a recent discovery of felsic lavas in Iceland led to an alternative hypothesis that implies the …

A Strategic Audit Of Live Nation Entertainment: Industry Position, Competitive Dynamics, And Long-Term Growth Outlook, William H. Wooden Iv, Owen B. Crone, Reece L. Flores, Grace A. Schaefer, Eric M. Jacob, Sydney A. Beck

Honors Program: Senior Projects (Public)

Live Nation Entertainment is the dominant global leader in the concert and live events industry, supported by a vertically integrated model that spans artist management, concert promotion, venue operations, ticketing, and sponsorship. This strategic audit evaluates Live Nation’s internal strengths, external threats, competitive position, corporate governance, and long-term strategic prospects based on comprehensive analysis of company reports, industry dynamics, and market trends. Live Nation benefits from unmatched scale, global venue ownership, exclusive artist relationships, and the substantial network effects generated by Ticketmaster, which collectively create high barriers to entry and sustained competitive advantage. The audit also examines significant challenges such …

A Temporal Extension Of Tasselnet With Uncertainty Quantification Using Bayesian Latent Autoregressive Model, Gayara Demini Fernando Muthunama Gonnage

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

Manual counting of maize tassels remains a time-consuming and labor-intensive process. Automating tassel counting using maize field images has received significant interest, with researchers exploring methods to streamline this task. Accurate tassel detection can substantially reduce both time and labor costs, offering a practical solution for large-scale agricultural management. Current studies in this area predominantly focus on training object detection algorithms to enhance prediction accuracy and efficiency. Images for this task are often captured in sequences, meaning they capture the exact location of the maize fields over time. However, existing tassel detection and counting methods typically ignore this sequential nature, …

A Comparative Analysis Of Complete Streets And Multimodal Transport Approaches: Implications For Sustainable Urban Mobility In Lincoln, And Global Contexts, Oliva Richard Kilyenyi

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

Movement of people and goods in urban areas through different modes of transportation including walking, cycling, public transit and by autos is termed as urban mobility. Urban mobility presents significant environmental, social, and economic challenges for cities worldwide as they grapple with the impacts of conventional transportation systems, particularly in North America context where car-centric planning approaches has dominated urban developments since 1950s. Car-centric dominance is 80% in North American Metropolitan areas (Manaugh et al., 2015). The impacts of these conventional systems include greenhouse gas emission emissions contributing approximately 24% of global carbon dioxide (CO₂) emissions, air pollution …

Llm-Assisted Cwe Identification, Severity Assessment, And Vulnerability Description Generation, Mohammad Jalili Torkamani

School of Computing: Dissertations, Theses, and Student Research

Identifying the underlying weakness types and assessing their severity using CWE and CVSS standards are critical steps in software vulnerability management. While timely assessment of vulnerabilities mitigates the impact of severe security incidents, automating joint CWE identification and severity assessment remains challenging due to the heterogeneity of vulnerabilities across different code granularities and programming languages. In addition, generating vulnerability descriptions is often time-consuming, as it requires extensive manual review, validation, and writing by security experts.

In this thesis, we leverage the capabilities of Large Language Models (LLMs) to automate the identification of CWE identifiers and the assessment of their severity …

A Low-Power Mixed-Signal Potentiostat System-On-Chip With Integrated Dual-Slope Adc, Seth Mcrobert

Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research

This thesis presents the design and characterization of a low-power mixed-signal potentiostat that was integrated with a 65 nm core in a SoC for low-power electrochemical sensing applications. The system integrates a low-noise transimpedance-based potentiostat front end with a 12-bit dual-slope analog-to-digital converter (ADC) for accurate current-to-digital conversion. The potentiostat core—comprising the control amplifier, current-mirror network, and transimpedance amplifier—consumes 38.2 µA from a 2.5 V supply (95.5 µW) and achieves an input-referred noise floor of 113 µVRMS over a 330 Hz bandwidth, while having an input current range from 1 nA to 20 µA and a noise-limited sensitivity of 56.4 …

Bridging Conservation And Planning: State Wildlife Action Plans Analyzed Using Wildlife Value Orientation, Ciara Nelson-Forcade

Community and Regional Planning Program: Theses

Wildlife conservation in the United States has transitioned from managing resources for human use to prioritizing ecosystem preservation and species protection. However, the ways in which conservation values and attitudes are reflected in state-level policy documents remain insufficiently examined. This thesis investigates how Wildlife Value Orientations (WVO) are expressed within State Wildlife Action Plans (SWAPs). Using a qualitative content analysis and flexible coding approach, fifteen SWAPs representing all eight U.S. Fish and Wildlife Service regions were analyzed to identify conservation themes, value orientations, and structural characteristics such as plan length, departmental budgets, and political context. Findings reveal that most plans …

Transportation Practitioners' Reflections On Addressing Transportation Barriers For Vulnerable Populations In Nebraska, Aysan Esmaely

Community and Regional Planning Program: Theses

This study examines transportation planning practices and challenges in Nebraska, with particular attention to how planners and agencies address the needs of vulnerable populations. Using a qualitative approach, thirty-five transportation planners, practitioners, and service providers were interviewed. Participants were selected based on their professional in transportation planning and service delivery. The study explores what institutional and funding barriers planners and practitioners face, and what strategies they consider most effective for improving access and inclusion. Findings reveal that limited funding, fragmented authority, and the absence of a coordinated regional planning framework significantly constrain transportation development across Nebraska. While metropolitan areas such …

Evaluating The Preparedness Of Local Zoning Regulations For Flood Risk Reduction In The Most Affected Local Jurisdictions In Nebraska, Md Asaduzzaman Noor

Community and Regional Planning Program: Theses

Flooding has profound social, economic, and environmental impacts on local communities, and zoning plays a critical role in mitigating these risks. The 2019 Nebraska floods, among the most severe in the state’s history, highlighted the urgent need to strengthen local preparedness and mitigation strategies. This study assesses the extent to which local zoning regulations in Nebraska’s most affected jurisdiction, including rural areas, address flood risk reduction. A systematic review of 117 zoning ordinances from counties, cities, towns, and villages, we applied a structured analytical framework encompassing regulatory and permitting policies, voluntary and incentive-based measures, and nature-based solutions. The results show …

Bridging Conservation And Disaster Recovery: A Dual Study On Wetland Program Plans Evaluation And Midwest Post Disaster Recovery Assessment, Rao Nargis Jahan

Community and Regional Planning Program: Theses

Wetlands provide essential ecological, social, and economic benefits for our society. In the United States, states and tribes play crucial roles in wetland protection, restoration, and management. However, no research has systematically measured state-level wetland planning efforts towards national conservation goals. This study is the first to comprehensively evaluate how state-level Wetland Program Plans (WPPs) align with national missions, particularly the "no-net-loss" of wetlands goal. Our research assesses the EPA-approved state-level WPPs from 42 out of 50 states in the United States during the period from 2015 to 2024. Using a protocol of 30 indicators across five categories, this study …

Flood Resilience Through Working-Land Conservation: Assessment Of Wetland Inundation Dynamics Across Wrp, Wma, Wpa, Padus And Crp Lands In Nebraska (2018–2024), Pranjay Joshi

Community and Regional Planning Program: Theses

This study first confirms whether Nebraska’s wetlands are still functioning hydrologically in ways that reduce flood impacts. Wetlands are known to lessen flood damage by storing water, slowing runoff, and moderating peak flows, but these benefits depend on the wetlands’ ability to maintain inundation and saturation through time. Many wetlands across the state have undergone drainage, hydrologic alteration, or isolation from surrounding watersheds, raising uncertainty about their present-day functioning. Using seven years of Sentinel-2 imagery processed in Google Earth Engine, this research establishes a clear, long-term record of inundation patterns across thousands of wetland parcels. This analysis verifies which wetlands …

Early Childhood Educators' Perception Of Burnout: Impact On Educator Self-Efficacy, Teacher-Child Relationships, And Children's Emotional Regulation, Isaac M.D. Bowman

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Early childhood educators (ECE) play a critical role in the academic advancement and nurturing care provided to children in their care, a distinct difference in role and responsibilities compared to traditional K-12 schooling. Published by the Buffett Early Childhood Institute, a report pertaining to ECE turnover revealed a nearly 40% annual turnover rate. Factors ECEs previously attributed to their exit of the early childhood education field involve low wage, low self-efficacy, and dealing with challenging behaviors. While not an exhaustive list, in a field relying predominantly on routine and consistency, ECE turnover rate highlights a necessity in exploring potential indirect …

Ethnic Identity, Parental Involvement, And Academic Outcomes: A Qualitative Study Of African International Students' Experiences, Kenanile Olivia Marie-France Bigba

College of Education and Human Sciences: Dissertations, Theses, and Student Research

This qualitative study explored how parental involvement intersected with cultural backgrounds and values through ethnic identity formation among African international students, and how these interactions influenced students' self-concept clarity, self-esteem, and subsequent academic attitudes and performance. Using hermeneutic phenomenological methodology guided by van Manen’s (2023) approach, the study conducted in-depth, semi-structured interviews with African international students (one from East Africa, one from West Africa) enrolled at a Midwest university. Through systematic thematic analysis, five interconnected themes emerged: (1) Evolving Parental Involvement, from direct guidance to distant trust, revealing how parental engagement transforms across geographical distance with financial circumstances moderating this …

How Presidents Shift Ideological Stances In Legislative Elections: Evidence From South Korean Presidential Speeches, Doyeon Park

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

Presidents have a strong desire to lead their parties to victory in elections. However, relatively little attention has been paid to their ideological stances in legislative elections. This contrasts with extensive research on the ideological strategies of parties and candidates who directly compete for office. How do presidents adjust their ideological positions in legislative elections? This study examines the institutional dynamics surrounding presidents, focusing on their dual responsibilities and the role of legislative elections as a referendum on the presidency. It also considers presidential popularity as a factor that influences these dynamics. I argue that presidents are more likely to …

Soil Characterization With Proximal Geophysics, Sophia M. Becker

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

High quality soil data is crucial for addressing numerous threats to human well-being such as water scarcity, food insecurity, and intensified natural disasters. True soil property values are determined by analyzing soil samples in a laboratory, but soil sampling is often expensive and time-consuming. Some in-field point sensors and remote sensing products are available to measure soil properties, but they have inherent limitations in measurement extent and resolution. Geophysical methods can fill the measurement scale gap between point measurements and remote sensing products, but various research questions remain open. This dissertation aims to advance understanding of geophysics-derived soil property measurements …

Investigating Molecular Rotation And Vibration With Ultrafast Electron Diffraction, Haoran Zhao

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

Ultrafast electron diffraction (UED) has emerged since the late 20th century as a powerful technique for resolving molecular dynamics. With its high spatial and temporal resolution, UED can now measure rotational motion induced by linearly polarized, nonresonant, nonadiabatic laser pulses—one of the fundamental molecular degrees of freedom with broad applications. By combining laser-induced alignment with UED, new capabilities such as three-dimensional structural retrieval and isotope detection have been demonstrated, as discussed in Chapter 2.

In Chapter 3, three symmetry relations in the coefficients of rotational wave packets are identified and derived, reducing the computational cost of simulating asymmetric-top molecular alignment …

Electrical And Magnetic Properties Of Ferroic Oxide Thin Films And Free-Standing Membranes, Qiuchen Wu

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

This dissertation presents a comprehensive study of the electrical, magnetic, and transport properties of epitaxial ferroic oxide thin films and free-standing membranes, including ferroelectric PbZr_0.2Ti_0.8O₃ (PZT) and ferrimagnetic NiCo₂O₄ (NCO).

We evaluate the effects of electrostatic and mechanical boundary conditions on the ferroelectric properties of free-standing PZT membranes by transferring them on three types of base layers: the metallic Au, strongly correlated oxide La_0.67Sr_0.33MnO₃ (LSMO), and 2D semiconductor MoS₂. The coercive field and domain wall roughness depend sensitively on the metallicity and surface roughness of …

From Vision To Practice: Implementing An Instructional Model Through Teacher Experience And Leadership Support, Stefanie Novotny

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

Implementing change in any organization is challenging. It requires careful planning, effective communication, and strong leadership. Principals provide support and empower stakeholders to take ownership of the change process. They create opportunities for others to contribute ideas, take on leadership roles, and drive innovation, fostering a culture of shared responsibility and collective action. Change leaders inspire creativity and encourage teachers to think outside the box, leading to the development of new ideas and processes that drive growth and success. This mixed-methods action research study investigated how teachers can enhance educational practices by implementing an instructional model to improve teaching strategies …

Synthesis And Study Of Stable Organic Radicals For Mri Contrast Agents And New Materials, Sabina Dhakal

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

The first part of this dissertation focuses on the design, synthesis, and characterization of a thermally robust S =1/2 phototetrazolinyl monoradical and the development of synthetic methodologies for a high-spin (S = 1) phototetrazolinyl diradical. Electrochemical studies of the phototetrazolium cation (precursor to the monoradical) revealed a remarkably narrow electrochemical band gap (Ecell ≈ 0.82 V), suggesting promising electrical conductivity. Thermal analysis of the monoradical demonstrated excellent stability, with the onset of decomposition at 232 °C. Building on the excellent thermal stability and promising properties for electrical conductivity of the monoradical, we developed two condensation-based synthetic routes that provide viable …

From Ghorer Golpo To Global Voices: Digital Storytelling As A Decolonial Pedagogy For English Language Learning In Bangladesh, Tamanna Sharmin Kabir

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

From Ghorer Golpo to Global Voices: Digital Storytelling as a Decolonial Pedagogy for English Language Learning in Bangladesh highlights how Digital Storytelling operates as a culturally sustaining and technologically supported approach within Bangladeshi undergraduate English education. Informed by my own navigation of Western and South Asian narrative traditions, the study responds to a longstanding challenge in English instruction: exam-focused, Eurocentric pedagogies often marginalize learners’ cultural identities and lived experiences. The research investigates how participants engaged with Digital Storytelling as a multimodal, technology-enhanced practice that supports language development, identity expression, and intercultural communication.

The study employed an arts-informed case study design …

Rainfall-Runoff Modelling In An Indonesian Humid Tropical Area Using Satellite-Based Precipitation Products, Noordiah Helda

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

This dissertation explores three rainfall-runoff models in the humid tropical regions of Indonesia using satellite-based precipitation products (SBPPs) and develops integrated machine-learning modeling frameworks. Several ground-based observations from BMKG (Badan Meteorologi, Klimatologi, dan Geofisika (also known as the Indonesian Agency for Meteorology, Climatology, and Geophysics)) stations across Indonesia (133−165 stations) are compared and evaluated against satellite products, indicating that GPM performs well, with R-squared values ranging from 0.54 to 0.76 and correlation coefficients ranging from 0.45 to 0.69, respectively.

In the Martapura Watershed, South Kalimantan, due to a lack of observational discharge data, streamflow was generated using the FJ Mock …

African American Women And Blogs: The Allure Of Culture-Specific Beauty Blogs, Kalari Flotree

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

The purpose of this qualitative, multi-case study was to explore the identity-related dress and appearance management implications of culture-specific beauty blog readership. The study was informed by three research questions: (a) Why and how do African American women seek out culture-specific beauty blogs? (b) What roles do African American women assume while engaging with culture-specific beauty blog communities? (c). How do African American women use culture-specific beauty blog content to inform identity-related processes of appearance management and dress?

The sample of this multiple-case study included nine participants, each representing a distinct case. Data were collected through individual, semi-structured, in-depth interviews, …