Digital Commons Network^™

Nonlinear Mathematical Transformations For Improved Image And Signal Recovery Using Artificial Neural Network, Haoran Chang

Theses and Dissertations

Medical imaging plays a vital role in modern healthcare, enabling clinicians to diagnose and treat a range of conditions. However, image acquisition and processing can be challenging because they can often be hindered by motion blurring, leading to inaccurate results. To address that, this dissertation proposes a novel approach based on nonlinear mathematical transformations and artificial neural networks (ANN). The dissertation begins with an introduction to Nuclear Medicine and the problem of motion blur in image reconstruction. A background on Medical Imaging techniques, including the Radon transform and Image Reconstruction methods such as Filtered Back Projection and Iterative Reconstruction methods …

An Erp Measure Of Non-Conscious Memory Reveals Dissociable Implicit Processes In Human Recognition Using An Open-Source Automated Analytic Pipeline, Richard J. Addante, Javier Lopez-Calderon, Nathaniel Allen, Carter Luck, Alana Muller, Lindsey Sirianni, Cory S. Inman, Daniel L. Drane

Psychology Faculty Publications

Non-conscious processing of human memory has traditionally been difficult to objectively measure and thus understand. A prior study on a group of hippocampal amnesia (N = 3) patients and healthy controls (N = 6) used a novel procedure for capturing neural correlates of implicit memory using event-related potentials (ERPs): old and new items were equated for varying levels of memory awareness, with ERP differences observed from 400 to 800 ms in bilateral parietal regions that were hippocampal-dependent. The current investigation sought to address the limitations of that study by increasing the sample of healthy subjects (N = 54), applying new …

Towards Explainable Ai: Predicting Linear And Nonlinear Feature Relations Of Datasets, Nimmy Chhaganbhai Patel

Theses and Dissertations

Artificial Intelligence (AI) makes critical decisions in an opaque way without explaining the reasoning behind them. Decision support systems are often built as black boxes. This has generated interest in Explainable AI (XAI), an area of research that explains AI algorithms and provides more insight into their internal decision-making process. Advancements in XAI have enhanced machine learning (ML) models’ interpretability, explainability, and transparency. Additionally, there has been speculation on whether it is possible to predict the type of dataset used in the model by analyzing the results. In this research, we proposed a methodology for determining the linearity or non-linearity …

Name Change Practices, Digital Commons Institutional Repository, Sue Ann Gardner

Copyright, Fair Use, Scholarly Communication, etc.

Includes information on practices for starting the process, guidelines for remedy by type of name change, and default practices for change of first/given name for name changes in the University of Nebraska-Lincoln Libraries' Digital Commons institutional repository.

Sprout: Using A Garden Metaphor To Visualize And Support Customizable And Collaborative Health Tracking, Pape Sow Traoré

Dartmouth College Master’s Theses

Self-tracking tools have become increasingly popular, especially with the advent of wearable technology and smartphone applications. However, traditional tracking tools often display data in a quantitative format that can be overwhelming and cause users to abandon their tracking efforts. Additionally, these tools typically provide a generic user experience and are designed from a single-user perspective, lacking external support. To overcome these limitations, we develop Sprout, a mobile data-tracking application that offers a more qualitative, customizable, and collaborative experience for health monitoring and management. Sprout uses a garden metaphor to visually represent health information and allows users to tailor their …

Prone Vs. Supine Position Ventilation In Intubated Covid-19 Patients: A Systematic Review And Meta-Analysis, Mohamed Fayed, Wissam Maroun, Ahmed Elnahla, Nicholas S. Yeldo, Jessica R. Was, Donald H. Penning

Anesthesiology Articles

Whether prone positioning of patients undergoing mechanical ventilation for COVID-19 pneumonia has benefits over supine positioning is not clear. We conducted a systematic review with meta-analysis to determine whether prone versus supine positioning during ventilation resulted in different outcomes for patients with COVID-19 pneumonia. We searched Ovid Medline, Embase, and Web of Science for prospective and retrospective studies up through April 2023. We included studies that compared outcomes of patients with COVID-19 after ventilation in prone and supine positions. The primary outcomes were three mortality measures: hospital, overall, and intensive care unit (ICU). Secondary outcomes were mechanical ventilation days, intensive …

Evaluating Planting Green And Herbicides For Integrated Weed Management And Their Effect On Soil Properties In Corn And Soybean In Nebraska, Trey Parker Stephens

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Producers across the Midwest are finding new ways to implement cover crops into cropping systems and the practice of “Planting Green” is one of the newest uses of cover crops. When planting green, producers plant their row crops into actively growing cover crops and terminate the cover crop at time of planting or shortly after planting. This practice would allow for higher biomass accumulation of the cover crop and could aid in weed management of herbicide-resistant weeds. The objective of the first two studies was to evaluate planting green and its effect on soil-applied residual herbicides, weed management, dicamba/glyphosate-resistant soybean …

Genomic Selection For Yield And Seed Composition Stability In An Applied Soybean Breeding Program, Benjamin Mark Harms

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Stability traits are of primary importance in plant breeding to ensure consistency in phenotype across a range of environments. However, selection efficiency and accuracy for stability traits can be hindered due to the requirement of obtaining phenotype data across multiple years and environments for proper stability analysis. Genomic selection is a method that allows prediction of a phenotype prior to observation in the field using genome-wide marker data and phenotype data from a training population. To assess prediction of stability traits, two elite-yielding soybean populations developed three years apart in the same breeding program were used. The individuals in each …

A Multi-Case Examination Of Leadership Development Programs For Emerging Educational Leaders In K–12 School Districts, Jason Thomsen

Department of Educational Administration: Dissertations, Theses, and Student Research

In recent years, a greater emphasis has been placed on leadership development programs across a wide array of sectors in an effort to improve organizations. A growing body of research indicates that strong educational leadership practices have the ability to impact virtually all aspects of a school system. What is less evident in the research is how K-12 school districts utilize leadership development programs and make decisions regarding the implementation of those programs in order to cultivate educational leaders. The purpose of this multi-case study was to examine how K-12 school districts utilize leadership development programs and the role that …

The Gendered Experience Of Female Resident Assistants, Christa Rahl

Department of Educational Administration: Dissertations, Theses, and Student Research

This paper sought to answer, “What is it like to be a female resident assistant (RA) in a society that has historically privileged men?” I structured this as a phenomenology within the transformative paradigm. I interviewed four participants twice with a prompt between interviews and one participant once. These participants were at least 19 years old and had held been an RA for at least one school year during the last five years.

I worked in the realm of Joan Acker’s (1990) theory of gendered organizations. I specifically had findings within the constructions she wrote about such as the division …

Designing A Work-Life Balance Learning Module For Cal Poly Construction Management Department, Alex Jones

Construction Management

The construction industry is known to create a highly stressful work environment given its unpredictability and mental/time demanding nature, which creates challenges for professionals to maintain a healthy work-life balance. This senior project aims to research and identify the key areas that foster this stress and propose a learning module for the Cal Poly Construction Management Department to implement into class curriculum. Having this learning module taught to students will raise awareness of the topic for future industry professionals and equip them with the tools to maintain a healthy equilibrium between their work demands and personal life. The learning module …

Defining And Transferring Digital Literacies: What Does This Mean For High School And College Educators?, Jocelyn Spoor

Department of English: Dissertations, Theses, and Student Research

This thesis aims to create a digital literacies transfer framework through a discussion regarding current conversations on transfer and digital literacies in the English field, including synthesizing the two ideas to think about the transfer of digital literacies as a concept. This digital literacies framework is made up of five components: the functional skills, critical skills, and rhetorical skills found in digital literacies scholarship and the genre awareness and meta-cognitive ideas found in transfer literature. This digital literacies transfer framework is then used to analyze information gleaned from four college and five high school English educators. The key findings from …

Correlation Between Fire And Preservation In The Pacific Northwest And Most Cost-Efficient Mitigation Tactics, Liam Doherty-Herwitz

Department of Environmental Studies: Undergraduate Student Theses

This study was conducted entirely online with occasional help from advisors and editors on zoom meetings. I completed the research in Lincoln, Nebraska. A meta analysis of online data has been conducted to form the answers to my hypotheses and research questions. I used specific keywords and phrases in research databases, and search engines such as google scholar to point me towards the answers I was looking for. The keywords and phrases were split up into four different categories which are mitigation techniques, ecosystems, fire severity: PNW, and fire season: PNW. The reason the topics land preservation and fire science …

Recycling Attitudes And Behaviors Toward Single-Use Plastics At The University Of Nebraska–Lincoln, Jadyn Chasek

Department of Environmental Studies: Undergraduate Student Theses

Today, single-use plastics pose an issue in the world with pollution from improper disposal as well as from the manufacturing of single-use plastic products. There is a need for change, plastic products have begun to consume the planet and harm life on Earth. Many people look to college universities for an opportunity to change issues such as the overconsumption of single-use plastics. A college campus is the perfect environment to study what changes can be made to fix an issue as well as how to implement those changes. This study was conducted at the University of Nebraska-Lincoln, where the undergraduate …

Amazon Deforestation And Its Effects On Local Climate, Andrew Baker

Department of Environmental Studies: Undergraduate Student Theses

The Amazon has been faced with extensive deforestation beginning in the 1960’s mainly for the purpose of cattle ranching and agriculture, as well as logging and mining making up smaller but noticeable portions. This rainforest is a place rich in its biodiversity of plants and animals, and until recently it was also one of the planet’s largest natural carbon sinks. This is important to help offset anthropogenic carbon emissions that are accelerating climate change, but because of the land use changes it has been subjected to, it has become another source of carbon release. This study aims to determine what …

Gender And Environmental Sustainability: A Cross-National Analysis On Political Representation Of Women And Subsequent State Sustainability, Erin O'Sullivan

Department of Environmental Studies: Undergraduate Student Theses

The literature focusing on the relationship between gender and environmental sustainability is vast. Research has focused on how gender relates to pro-sustainable behavior but fails to analyze this beyond individual action. Research has also found positive correlations between women’s representation at a state’s political level and different factors of state sustainability. However, literature has fallen short on analyzing if there is a causal effect between these factors. This study aimed to fill this gap in the literature and analyzes how the ratio of women in parliament in a state affects the state’s environmental sustainability. Although the results showed no statistically …

Examining The Psychology And Human Behavior Of Sustainable Living: The Impact Of Socioeconomic Status On Climate Change Education, Samantha Nielsen

Department of Environmental Studies: Undergraduate Student Theses

Climate change education has become increasingly important as the world faces the challenges of a rapidly changing environment. However, not all individuals have equal access to this education, and socioeconomic status has been identified as a barrier to climate change knowledge. This thesis explores the impact of socioeconomic status on climate change education through a survey-based approach, using the Nebraska Annual Social Indicators Survey to investigate the relationship between income and degree of education with climate change concern and community interaction. The study finds a significant correlation between higher levels of education and climate change concern, as well as greater …

Impact Of The Covid-19 Pandemic On Nebraska State Park Visitation, Bailey Mullins

Department of Environmental Studies: Undergraduate Student Theses

The Covid-19 virus was declared a pandemic on March 11, 2020 by the World Health Organization. Since then the outdoor recreation habits of the general public have changed due to the constraints and risks of the virus. The first case of Covid-19 in Nebraska was reported in March of 2020. One of the most popular places for recreation in the state of Nebraska is to visit our state parks and recreation areas. The purpose of this research is to determine how the Covid-19 pandemic has impacted visitation at Nebraska state parks and recreation areas. To do this, the Nebraska Game …

Regenerative Agriculture: A Pathway For Addressing Nebraska’S Water Quality And Soil Degradation Challenges, Kjersten Hyberger

Department of Environmental Studies: Undergraduate Student Theses

It is important to begin this thesis by acknowledging that the State of Nebraska is on stolen Native land. Furthermore, the University of Nebraska is a land-grant university that was ultimately given 89,920 acres of Native lands for the paltry sum of $11,194. To date, the University of Nebraska has benefited from a 51:1 profit ratio on the funds raised from its 1873 land grant, raising over $500,000 in endowment principle. I humbly acknowledge that the privilege of earning my degree at UNL came through the often violent and bloody displacement of multiple tribal nations (High Country News, 2020).

Evaluating Ecosystem Health Of The Salt Creek Basin Through Two-Eyed Seeing, Shelby Serritella

Department of Environmental Studies: Undergraduate Student Theses

Few instances of prior research into socio-ecological health have brought together both Indigenous Knowledge Systems and Western science, especially in Nebraska. This study attempts to fill this gap in Lancaster County, Nebraska by using “Two-Eyed Seeing”. This equitably combines both Indigenous Knowledge Systems (qualitative data), obtained through oral interviews with Indigenous community members, and Western science (quantitative data), obtained through USGS, UNL, and U.S. Drought Monitor databases, to assess ecosystem health. Changes to the Salt Creek Basin were collected and analyzed through this Two-Eyed Seeing framework. Results found that there are high levels of consensus between both knowledge systems regarding …

Identifying A Consumer–Producer Agricultural Knowledge Gap, Aspen Rittgarn

Department of Environmental Studies: Undergraduate Student Theses

The purpose of this paper and online survey was to see if an agricultural knowledge gap between consumers and producers be found. Low agricultural literacy rates can lead to misconceptions of the agriculture industry, unhealthy food choices, environmentally unfriendly product choices, food waste, etc. The hypothesis for this thesis is that those born in the mid1960s to early 1980s (Generation X) will be the start of an increased knowledge gap. The survey was compiled of both qualitative and quantitative questions and questions were inspired by American Farm Bureau’s AITC Benchmarks. Responses were analyzed and the results revealed that my participants …

Design Of A Miniature Robotic Surgery Technology Demonstration Payload For Orbital Spaceflight, Rachael A. Wagner

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

This thesis describes the design of a technology demonstration payload that will test robotic surgery while aboard a 2024 expedition of the International Space Station (ISS). The payload utilizes a new miniature surgical robot to complete simulated surgical tasks on orbit, both autonomously and while remotely controlled by an Earth-based user. The experiment investigates the effects of microgravity and latency on robotic surgery, with the following goals:

1. Demonstrate the use of a miniature robotic surgical system in microgravity through performing simulated surgical tasks.

2. Quantify the effects of microgravity on robotic surgical techniques including forces, torques, and kinematic accuracy. …

Point Heat Source Correlation To Microstructural Evolution In Advanced Manufacturing, Mark Anderson

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Although there are different ways that advanced manufacturing can be performed, the use of single-point heat sources has become the standard to control a final product’s properties. It is imperative to understand how the heat source used in the different advanced manufacturing processes affect the microstructure of interest. The intimate relationship between the heat source and microstructure allows for controlling and tailoring a part’s properties. Utilizing different microstructural analysis, the cross-correlation of various point heat sources to developed microstructure was conducted in this dissertation.

Laser powder bed fusion allows for unique print-to-part protocols, but the dynamics of the process makes …

Blood Flow Regulates Atherosclerosis Progression And Regression, Morgan A. Schake

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Atherosclerosis is the most prevalent pathology of cardiovascular disease with no known cure. Despite the many systemic risk factors for atherosclerosis, plaques do not form randomly in the vasculature. Instead, they form around bifurcations and the inner curvature of highly curving arterial segments that contain so-called disturbed blood flow that is low in magnitude and multidirectional over the cardiac cycle. Conversely, straight, non-bifurcated arterial segments that contain moderate-to-high and unidirectional (i.e., normal) blood flow are protected from plaque development. Thus, blood flow is a key regulator of atherosclerosis that may be able to be leveraged to develop new therapeutics. Towards …

Themes And Participants’ Role In Online Health Discussion: Evidence From Reddit, Massara Alazazi

Theses and Dissertations

Health-related topics are discussed widely on different social networking sites. These discussions and their related aspects can reveal significant insights and patterns that are worth studying and understanding. In this dissertation, we explore the patterns of mandatory and voluntary vaccine online discussions including the topics discussed, the words correlated with each of them, and the sentiment expressed. Moreover, we explore the role opinion leaders play in the health discussion and their impact on participation in a particular discussion. Opinion leaders are determined, and their impact on discussion participation is differentiated based on their different characteristics such as their connections and …

Realizing The Good Despite Customer Mistreatment, Carissa Kim

College of Business: Dissertations, Theses, and Student Research

Unruly and rude customer behavior is on the rise. Estimates indicate that frontline employees experience ten episodes of customer mistreatment daily. Not only is customer mistreatment detrimental for the frontline employee (e.g., higher turnover, lower job satisfaction, lower well-being, and more), but also for customers that witness (e.g., emotional contagion) or engage (e.g., loss of morals) in these deviant interpersonal behaviors. Extending the body of research on customer mistreatment, my dissertation seeks to investigate silver linings or possible functional consequences of customer mistreatment. My dissertation draws from Emotions as Social Information (EASI) theory to investigate the outcomes of mistreatment in …

New Paradigms In Band Performance: An Analysis Of Three Prototypes, Scott Walker-Parker

Glenn Korff School of Music: Dissertations, Theses, Student Creative Work, and Performances

This document seeks to propose new paradigms in band performance through inter-, multi-, and transdisciplinarity. Initial inspirations were drawn from performance innovations shaped by the new music theater which became popular in the 20^th century. Key concepts which were used throughout the creative, planning, logistic, rehearsal, and performance processes are analyzed in three recitals through prototypes of new paradigms in band performance. These concepts include accessibility and community, nonverbal/multimodal performance and instruction versus time, and nonverbal/multimodal communication.

The document has been organized in a manner which highlights successes and breakdowns of each process so future refinement can be made. …

Listening For Common Ground In High School And Early Collegiate Mathematics, Gail Burrill, Henry Cohn, Yvonne Lai, Dev P. Sinha, Ji Y. Son, Katherine F. Stevenson

Department of Mathematics: Faculty Publications

Solutions to pressing and complex social challenges require that we reach for common ground. Only through cooperation among people with a broad range of backgrounds and expertise can progress be made on issues as challenging as improving student success in mathematics. In this spirit, the AMS Committee on Education held a forum in May 2022 entitled The Evolving Curriculum in High School and Early Undergraduate Mathematical Sciences Education.¹ This article is a report on that forum by the authors listed above, who were among the organizers and presenters.

An Introduction To Autocad For Beginners, Zoe L. Mahaney

Construction Management

This paper aims to outline the process of developing and creating an online instructional video tutorial for beginner level individuals who hope to learn and utilize AutoCAD software. AutoCAD, developed by Autodesk, is a computer-aided design software that provides users with the ability to create and edit digital 2D and 3D designs, which is more efficient than traditional hand-drawn models. The main objective of this project is to provide the public with access to learning and navigating AutoCAD software on their own, for personal gain. Construction Management students at Cal Poly have the opportunity to learn and use AutoCAD as …

Leveraging Aruco Fiducial Marker System For Bridge Displacement Estimation Using Unmanned Aerial Vehicles, Mohamed Aly

School of Computing: Dissertations, Theses, and Student Research

The use of unmanned aerial vehicles (UAVs) in construction sites has been widely growing for surveying and inspection purposes. Their mobility and agility have enabled engineers to use UAVs in Structural Health Monitoring (SHM) applications to overcome the limitations of traditional approaches that require labor-intensive installation, extended time, and long-term maintenance. One of the critical applications of SHM is measuring bridge deflections during the bridge operation period. Due to the complex remote sites of bridges, remote sensing techniques, such as camera-equipped drones, can facilitate measuring bridge deflections. This work takes a step to build a pipeline using the state-of-the-art computer …