Digital Commons Network^™

Evaluating The Impact Of Research Equipment Availability On Scientific Rigor, Reproducibility, And Innovation Across Stem Disciplines, Lyndi G. Hraban

Honors Program: Senior Projects (Public)

Research infrastructure plays a central role in shaping the quality and innovative capacity of scientific research. This study evaluates how the availability of research equipment influences scientific rigor, reproducibility, and innovation across STEM disciplines. Drawing on literature from science-to-science research, policy studies, and discipline-specific analyses, this project synthesizes existing scholarship to explore the relationship between access to infrastructure and key research outcomes. Findings across the literature indicate that access to advanced and well-maintained equipment can strengthen scientific rigor by enabling more precise measurements, improved experimental control, and the implementation of standardized research protocols. Shared and centralized facilities are also associated …

Wheat, War, And Water: The Making Of Food Insecurity In Afghanistan, Karam Alkaissy Mr.

RURALS: Review of Undergraduate Research in Agricultural and Life Sciences

This paper attempts to explain why Afghanistan's exceptional dependence on wheat has produced one of the world's most severe food crises, as the crop's dietary centrality collides with environmental stress, political upheaval, and shifting agricultural systems. The FAO projects that 17.4 million people - roughly 40 percent of the population - will experience acute food insecurity in 2026; wheat supplies up to 57 percent of caloric intake, making this dependence a profound source of vulnerability. Examining wheat through culinary, climatic, political, and agricultural lenses, the paper shows that water lies at the heart of the crisis. Climate change is reducing …

Sang M. Lee, Unl Business Management; Goal Programming, Mark Griep, Sang M. Lee

UNL ORCA Interview Series

Dr. Sang Lee was awarded the ORCA in 1980. Sang was born in 1939 in South Korea and grew up in Seoul. He earned his bachelor’s in 1961 at Seoul National University. Next, he traveled over 7000 miles to the US to earn a master’s from Miami University in Oxford, Ohio, and then a somewhat shorter move to the University of Georgia in Athens, where he earned a doctorate in Business Administration and Management. From 1968 to 1976, he rose through the ranks at Virginia Polytechnic Institute in Blacksburg while making a splash for his “goal programming” ideas. In 1976, …

Norman H. Cromwell, Unl Chemistry; Nu System Dean; Eppley Cancer Center Director, Norman H. Cromwell, Pete Boughn, Mark A. Griep

UNL ORCA Interview Series

This 1980 interview of Normal Cromwell was done by Pete Boughn at the University of Nebraska Medical Center in Omaha. He asked about Cromwell’s history but mostly about his time as director of the Eppley Cancer Center. The interview is reproduced with permission from the UNMC McGoogan Library.

Cromwell was born in 1913 in Terre Haute, Indiana. In 1935, he earned a bachelor’s degree in chemical engineering from the Rose-Hulman Institute of Technology in his hometown. In 1939, three things happened: he earned a doctorate in organic chemistry from the University of Minnesota, he got married, and he was hired …

The Use Of Chitosan-G-Poly (Acrylic Acid-Co-Acrylamide) In The Delivery Of Imatinib In The Small Intestine, Dawson Ohrt, Clint Everard

Nebraska Academy of Sciences: Programs and Proceedings

The use of hydrogels as drug delivery systems is the future of biotechnology, hydrogels can offer a new way of controlled delivery to specific areas of the body. Hydrogel also create new possibilities for treatments of gastrointestinal stromal tumors (GISTs). There are many different types of hydrogels that can be used in drug delivery. Hydrogels offer customizability in regard to the release of drugs in specific environments. The chemical properties of hydrogels allow for them to be manipulated for specific functions such as release at a specific pH . The hydrogel being used in the study is Chitosan-G-Poly (Acrylic Acid …

Parks Coble, Jr., Unl History; Chinese Nationalists & Business, Chinese-Japanese Relations, Mark A. Griep, Parks M. Coble Jr.

UNL ORCA Interview Series

Dr. Parks Coble, Jr. was awarded the ORCA in 2005. He was born in Waterloo, South Carolina in 1946 but he grew up in Columbia. He earned his bachelor’s in history at the University of South Carolina in Columbia. Next, he traveled 740 miles northwest to earn his doctorate at the University of Illinois in Champaign. In 1976, he became an assistant professor of history at the University of Nebraska, where he quickly rose through the ranks. His early work focused on the relationship between Chinese business elites and leaders of the Chinese National Government movement during a very interesting …

Evaluating The Motivations Of Participants In Online Equine Extension Courses, Sarah Vos

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

Traditional program evaluations emphasize participant demographics, knowledge gain, behavior change, and program impact. However, evaluating participant motivation can provide addition insight into why participants enroll in extension programs and help explain participant engagement and persistence throughout a program. The purpose of this study was to evaluate participant motivation in two online equine extension courses and examine potential relationships between motivation, demographics, and course delivery method, and describe participant engagement in Virtual Horse Judging Camp (VHJC). This cross-sectional study utilized convenience sampling of participants in two online equine extension courses, Horse Adult Leader Training and Educational Resource (HALTER) and VHJC. The …

Navigating Queer Identities In Rural Communities: The Role Of Social Support In Shaping Lgbq+ Adolescents’ Identity Development, Michaela Elaine Pierson

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

Adolescents who identify as lesbian, gay, bisexual, or queer (LGBQ+) develop their identities within complex social contexts. In rural settings, limited access to affirming resources and greater exposure to stigma may further shape identity development. Guided by social ecological and minority stress theories, this study examined whether perceived family and friend support predict identity affirmation and internalized homonegativity among rural LGBQ+ adolescents. Participants included 53 adolescents ages 13 to 18 drawn from a larger dataset. Group differences across demographic variables were examined, and regression analyses were used to evaluate the predictive role of family and friend support. No significant group …

Fred Luthans, Unl Business Management, Positive Organizational Behavior, Mark Griep, Fred Luthans

UNL ORCA Interview Series

Fred Luthans was awarded the ORCA in 2008. He was born in Clinton, Iowa in 1939. He earned three degrees from the University of Iowa in Iowa City, located only a few miles from Clinton. His bachelor's was in mathematics in 1961, a Master’s of Business Administration in ‘62, PhD in Management and Psychology in 1965. After serving two years as a captain in the Army at West Point, where he taught psychology and leadership, he joined the University of Nebraska-Lincoln as an Associate Professor of Management. He's had a remarkable career, but I'll only mention three major distinctions. His …

Observing System Simulation Experiments To Investigate Impacts Of Deep-Tropospheric Uas Flights On Forecasts, Kenneth Alexander Swan

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

Uncrewed aircraft systems have emerged as a promising option to address meteorological gaps in observations in the lower troposphere. With recent advancements, UAS may be able to address gaps aloft in areas that lack coverage from radiosondes and commercial aircraft. UAS have shown the potential to significantly benefit NWP forecasts from profiles in the lowest 2 km AGL, but the impact of UAS profiles to the tropopause has yet to be quantified. Additionally, the impacts of hazardous flying conditions that UAS would encounter need to be addressed to guide future UAS capabilities. To address these questions, we designed an observing …

Nebraska And The Midwest Agtech Ecosystem: Benchmarking Innovation Investment And Translation Gaps, Ankit Chandra, Ishani Lal, Brennan Costello

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

Agricultural innovation is central to the sustainable transformation of food systems, yet the capital that finances it is unevenly distributed relative to where food is produced. This paper develops a diagnostic framework for measuring this mismatch and applies it across the U.S. Midwest from 2021 to 2025, with particular emphasis on Nebraska's structural position within this landscape. Drawing on venture capital deal-flow data, 17 stakeholder interviews, and a novel strength-weakness-opportunity-gap (SWOG) ecosystem mapping methodology, we document $736 million in tracked Midwest AgTech funding across eight states (Nebraska, Iowa, Missouri, Illinois, Indiana, Kansas, North Dakota, and South Dakota). We introduce three …

Tales Of The Empathic Support Provider: How Emerging Adult Women Make Sense Of Providing Empathic Support To Female Friends, Emma R. Eslinger

Department of Communication Studies: Dissertations, Theses, and Student Research

The current study explored the stories and reflections of 33 emerging adult women who made sense of their empathic support provider (ESP) identity in the context of female friendships. From the standpoint of the retrospective storytelling heuristic, within communicated narrative sense-making theory, participants told stories about their ESP identity, including how they provide support to others and reflect on the benefits of drawbacks of serving in this role (CNSM, Koenig Kellas, 2022). Under Proposition 1 of CNSM theory, meanings, values, and beliefs (MVBs) that ESP women expressed in this role were depicted as key takeaways gathered. Findings illuminated how ESP …

Pinochet’S Upswing: The Demise Of A Democratic Society In Chile, Jacob Behnk

Honors Program: Senior Projects (Public)

In the United States, we tend to view democracy as an inviolable tenet of political life. Our nation’s founding is even romanticized as a heroic fight for liberty against the wicked tyranny of the British monarchy. It is unthinkable that democracy could ever be destroyed, let alone have the citizens cheer on those who engineer its destruction—yet this is the very situation that Chile found itself regarding Augusto Pinochet, a brutal dictator who ruled the country with an iron fist from 1973 to 1990. Pinochet would be voted out of power in a 1988 plebiscite, but still managed to win …

Evaluation Of A Vortex Flow Device On A Center Pivot Irrigation System, Ankit Chandra, Derek M. Heeren, Tyler Smith

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

This study presents the first independent field evaluation of a passive vortex flow device designed to reduce hydraulic friction in pressurized irrigation systems. Experiments were conducted on a full-scale, groundwater-fed center pivot irrigation system at the Eastern Nebraska Research, Extension, and Education Center (ENREEC). A paired comparison approach was used to quantify differences in flow rate, energy consumption, and pressure distribution along the pivot lateral under baseline (no device) and treatment (device installed) conditions. Results showed negligible change in system flow rate (621 vs. 618 gpm) and energy consumption (~1.2% difference), consistent with expectations for pressure-regulated irrigation systems. However, the …

Exploring Gene Regulatory Neural Network Biocomputing Of Bacteria, Adrian Merle Ratwatte

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

Artificial Intelligence (AI) has evolved from brain-inspired algorithms into a discipline that increasingly integrates with biological systems. While silicon-based platforms have advanced machine learning, they remain limited in energy efficiency and operation in environments beyond silicon. This motivates biological computing as an alternative, enabling efficient, resource-aware, and reconfigurable computing within living systems. This dissertation addresses these limitations by introducing a bacterial computing framework that models Gene Regulatory Networks (GRNs) as Gene Regulatory Neural Networks (GRNNs). The GRNN mirrors the structure and function of Artificial Neural Networks (ANNs) through gene-gene interactions across trans-omic layers, enabling natural, self-regulating information processing within living …

The Relationships Between Perceived Quality Of Sexual Educational Experiences From Multiple Sources And Sexual Wellbeing Outcomes In A Sample Of U.S. College Women, Alex Diede

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

Sexual education comes from many sources and is important for sexual wellbeing. Much of the research on relationships between sexual education and sexual wellbeing has examined specific sources (e.g., schools or parents) and outcomes related to sexual risk-reduction, such as contraceptive use (e.g., Lameiras-Fernández et al., 2021; Widman et al., 2016). Less is known about the relationships between sexual education and positive sexual wellbeing outcomes. This study used a sample of college women to examine the relationships between the perceived quality of sexual education before college from four sources (i.e., caregivers, school, peers, self) and sexual wellbeing outcomes, including ego-focused …

Diagnosis Of Covid-19 Impact On The Construction Employment: Decline And Recovery, Anil Baral, Abdullah Alnuaimi, Yunping Liang, Baabak Ashuri, Mohsen S. Shahandashti

Durham School of Architectural Engineering and Construction: Faculty Publications

The Coronavirus Disease 2019 (COVID-19) had an unprecedented impact on U.S. construction employment. The assessment of employment declines and recoveries across various construction sectors, workforce demographics, and geographic regions helps develop inclusive long-term plans to overcome the setbacks of natural hazards, such as the COVID-19 pandemic. Existing methods for quantifying the employment decline from sudden shocks do not consider trends and seasonality of construction employment under normal conditions. Hence, it is not clear whether the employment declines are due to the impact of a disaster or associated with trends and seasonal patterns of employment. The objective of this research is …

Interview With Orca Winner Xiao Cheng Zeng; Unl Chemistry; Computational/Theoretical; Nebraska Ice & Gold Nanocages, Mark Griep, Xiao Cheng Zeng

UNL ORCA Interview Series

Xiao Cheng Zeng became a chemistry professor at the University of Nebraska-Lincoln in 1993, quickly rose through the ranks, and was in the department for 29 years. In 2022, he left to become head of the Department of Materials Science and Engineering at the City University of Hong Kong. Xiao was born in Beijing and earned a bachelor’s in physics at the University of Beijing in 1984. Next, he traveled 6800 miles east to Ohio State University in Columbus where he earned his doctorate in condensed matter physics. He followed that up with two postdoctoral experiences, first at the University …

Shared Language For Responsible Ai Integration, Asa B. Stone, Mark C. Stone, Alisha Bevins, Jean Claude Niyomugabo, Irene Magara, Jacob Abaare, Derek M. Heeren, Mubarak Abu Zouriq

PRAIRIE: Pioneering Responsible AI for Research, Innovation, and Education

As AI rapidly reshapes how we work and learn, employers increasingly seek graduates who can think before they prompt, exercising judgment under pressure rather than merely producing output. Yet students are praised for AI use in one course and penalized for it in the next, and faculty are left to lead responsibly on shifting ground, with no shared language to guide them.

This paper introduces the PRAIRIE Framework for AI Integration, a shift from reactive gatekeeping toward proactive stewardship. It emerged from a qualitative sentiment analysis of three communities (students, faculty, and industry partners) whose concerns converged on one need: …

Thermodynamic Modeling Of Ph Impacts On Subsurface Microbial Consortia, Jackfin K C

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

Underground hydrogen storage is affected by microbial consumption, and the different minerals present in the subsurface. However, most studies consider either biotic or abiotic factors in isolation and hence, the conditions that drive a self-sustaining storage remain poorly understood. This thesis uses a genome-informed thermodynamic model developed by Kharel et al. (2026) in which pH is the central variable coupling hydrogenotrophic microbial metabolism, inter-species competition, and carbonate mineral buffering. The model includes four hydrogen-consuming species: methanogen (Methanobacterium), acetogen (Acetoanaerobium), aerobic acetate oxidizer (Pseudomonas stutzeri), and sulfate reducer (Nitratidesulfovibrio) by conditioning each organism's …

Investigation Of Warfarin–Human Serum Albumin Binding By Ultrafast Affinity Extraction Using Single- And Dual-Column Affinity Microcolumn Systems, Samiul Alim

Department of Chemistry: Dissertations, Theses, and Student Research

This dissertation examined the interaction of warfarin with human serum albumin (HSA) by using affinity chromatography, with particular emphasis on ultrafast affinity extraction (UAE) and affinity microcolumns. HSA affinity supports were prepared by immobilizing HSA onto diol-bonded silica via Schiff base chemistry and used to prepare affinity microcolumns for chromatographic studies under physiological-like conditions at pH 7.4 and 37.0 °C. UAE studies were performed to investigate the effects of residence time, flow rate, and column configuration on the measured apparent free fraction of warfarin and on the calculated apparent binding parameters. The results showed that the measured apparent free fraction …

Can Generative Ai Make Farming Decisions? Current Status And Future Pathways: A Case Study In Row Crop Production With Chatgpt, Nipuna Chamara, Yufeng Ge, Joe Luck, Yu Pan, Saleh Taghvaeian, Cory Walters, Christopher Proctor, Daran Rudnick, Daren Redfearn

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The agricultural decision-making process is experience-based, knowledge-dependent, time-sensitive, complex, and driven by historical data. Planting, fertilization, irrigation, and chemigation are key categories in farm decision-making, and currently there is no one-shot decision-support tool that covers all these activities. Generative Artificial Intelligence (AI) models are more advanced than traditional machine learning and deep learning models. These models have been trained on vast amounts of data from the internet, allowing them to accept unstructured data in various forms and generate human-like text, solutions to problems, and scenario predictions. Given this capability, we became interested in exploring the potential of generative AI in …

Construction Project Administration: Course Portfolio, Andre Messner

UNL Faculty Course Portfolios

This portfolio presents a structured framework for the design and implementation of a construction project administration course within a Construction Management program. Emphasis is placed on aligning student learning objectives, instructional strategies, and assessment methods with current industry expectations and professional standards. The course is intentionally designed to bridge the gap between theoretical knowledge and practical application by incorporating real-world scenarios, collaborative learning environments, and experiential activities that mirror industry practices.

In addition to outlining the course structure, this paper examines the pedagogical foundations that support student-centered learning, including constructivism, scaffolding, and project-based learning. These approaches are used to foster …

Sit-To-Stand: Smart Physical Therapy Device Design Project, Mollie Petersen, Evie Collier, Gracie Kniss, Lucas Sokolik, Jacob Zitek

Honors Program: Senior Projects (Public)

Mechanical engineering students in their last year are provided with the opportunity to form a small group and design a product. The specific project covered in this report is the creation of a smart attachment to a physical therapy device. A sit-to-stand piece of equipment is used to help patients recover or build the strength to move from a sitting to standing position after an injury or illness. Currently, there is not a way for physical therapists to collect numerical data while a patient is using the equipment. Much of their care plans are built off of personal perception and …

Oxide Failures In Sic Power Mosfets, Kate L. Smith

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

Ramp to breakdown (RTBD), constant voltage time dependent dielectric breakdown (CVS-TDDB), and low-field long term (LFLT) tests were performed on commercially available silicon carbide MOSFETs from four manufacturers in discrete, TO-247 packaging (A, B, C, and D). Voltage and temperature stress factors are examined for their impact on oxide breakdown. “High temperature gate bias stress test of silicon carbide MOSFETs from multiple manufacturers were performed. It was found that some extrinsic oxide failures are an ongoing problem. The results of the tests and lifetime analysis are presented” (Oxide Failures in SiC Power MOSFETs).

Online Legislation: Developments And Trends In Data Privacy And Software Development, Garrett J. Splinter

Honors Program: Senior Projects (Public)

The increasingly relevant interaction between the law and data privacy, as well as compliance requirements enforced by the United States, is currently in a state of transition. Various states, such as California, Colorado, Connecticut, Nebraska, and many others, all have passed legislation with varied requirements and definitions that make for a challenging framework in which software developers operate, as the universal nature of the internet renders their compliance with current legislation a challenge. Enforcement also tends to be relatively relaxed in most modern examples, though it has escalated after 2020, and this trend may continue in the future, lending credence …

Analysis Of Dynamic Difficulty Scaling Ai In Video Games, Tyrese W. Walker

Honors Program: Senior Projects (Public)

Video games are a popular form of interactive media and, since their inception, have become one of the largest forms of media consumed. As such, they have evolved greatly from their humble beginnings into much more complex experiences, and adjusting the difficulty level to suit the needs of the player has become common practice. While there are simple ways to do so, the best games often feature a dynamic difficulty-scaling system that adapts to the player. Classics like Resident Evil and Left 4 Dead are excellent examples of innovative dynamic scaling design. By analyzing the strongest elements of these works, …

Brazilian Souls: Portraits Of Brazilian Nationalism In The Piano, Rafael Lima Lima De Paula

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

This portfolio consists of the artifacts of the creative, artistic and research work realized during my doctoral studies. In its core, all recitals had Brazilian music, especially that of H. Villa-Lobos, as a unifying element, although personal taste and reasoning were also a driving force behind choosing repertoire and building a theme for each recital. The research work is connected to the repertoire performed, with Villa-Lobos' music and the Brazilian nationalist movement as common threads. “Respectful Majesty,” the research paper attached to Recital 1 analyzes elements present in Villa-Lobos Bachianas Brasileiras N.4 and brings the piece's neoclassical nature to the …

Lightweight Attestation Techniques For The Industrial Internet Of Things, Syed Owais Athar

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

The Industrial Internet of Things (IIoT) has transformed critical infrastructure by integrating programmable logic controllers (PLCs) with connected sensors, actuators, and supervisory systems. While these advancements enhance operational efficiency, they also increase exposure to sophisticated cyber-physical threats, particularly through malicious modifications of PLC programs. Existing attestation methods either impose significant computational burdens by performing continuous verification or rely on detailed physical models that are often impractical to maintain across heterogeneous environments.

The first part of this thesis focuses on DuAtt, a dual-layer attestation scheme that integrates a physical process–based anomaly detection mechanism with a targeted attestation of the PLC program. …

The Value Of Difficulty In Engineering Education To Professional Work Experience Of Early Career Engineers: A Multiple Case Study, Nosakhare Iyobosa Idiaghe

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

Engineering education has long been characterized by rigor, intensity, and selective sorting, conditions often justified as necessary for producing capable engineers. Yet, despite the widespread assumption that academic hardship prepares students for professional practice, relatively little empirical work has examined how graduates themselves interpret the value of these difficult experiences once they enter the workforce. This dissertation addresses that gap by investigating how early-career engineers make sense of the difficulty encountered in their undergraduate education and how those experiences compare to the challenges of engineering practice.

Using a qualitative multiple‑case study design, the research draws on semi‑structured interviews with eight …