Evaluating Drug Concentration Profiles In Wastewater To Develop A Framework For Estimating Drug User Populations, Carl Michael E. Espinosa

All Theses

Chemical compounds, including licit and illicit drugs can be measured in wastewater and used to assess community drug consumption, providing valuable information for public health agencies, law enforcement, and local communities. While previous research primarily focused on estimating the per capita community drug consumption using back-calculation, this research focused on utilizing literature-derived parameters including drug dosage, renal excretion fraction, and sewer stability to develop a framework to estimate the user populations using Monte Carlo simulations. Samples were collected from two wastewater treatment facilities representing the Generostee Creek WWTP’s sewershed (GCS) and Mauldin Road WRRF’s sewershed (MRS). The target analytes included …

Immersive Attraction Design Using Real Time Virtual Production Techniques: A South Carolinian Ghost-Lore Dark Ride, Gabrielle M. Delo

All Theses

The role of themed entertainment can serve as a tool for cultural enrichment by integrating regional folklore into attraction design, using South Carolina’s “Gray Man” legend as the narrative foundation for a proposed dark ride. This project highlights how attractions can introduce wider audiences to lesser-known folktales while fostering appreciation for regional identity. It also examines the use of real-time virtual production, specifically using Unreal Engine 5.5, as a unified platform for previsualizing narrative-driven environments, enabling efficient iteration and integration of both physical and digital storytelling elements. This project positions game engine technology as a means of preserving and communicating …

Extended Adaptive Oscillator Framework For Gait Phase Estimation With Adaptive Coupling And Transition Detection Across Locomotion Tasks, Nikhila Radha Krishnan

All Theses

Gait phase is a human-inspired physical variable that describes the instantaneous position of a person within a gait cycle. Adaptive oscillators have been widely used for gait phase estimation due to their ability to synchronize with periodic and pseudo-periodic biomechanical signals and generate monotonically increasing cyclic phase values. Typically, the performance of adaptive oscillators is strongly influenced by coupling strength, a parameter that bridges a trade-off between convergence speed and steady-state variability of the estimated stride frequency. In gait assistive applications, stride frequency estimation must be sufficiently fast to enable phase-based assistance while achieving a stable stride frequency estimate. The …

Investigating The Effects Of Draw Parameters On The Refractive Index Profiles Of Phosphosilicate Fibers, Brandi Baldus

All Theses

P₂O₅ is a common dopant core material in silica-based glass optical fibers, in part due to its ability to increase the refractive index of silica, required for the fiber to guide light. However, P₂O₅-doped fibers can show a significant decrease in the refractive index profile compared to that of the parent preform. The question arises as to whether the refractive index decreasing could be a direct result of the fiber draw process and, if so, what is it about the draw process that causing such changes in phosphosilicate fibers. More specifically, this Thesis explores the hypothesis that these draw-induced reductions …

Characterizing Microplastics In Flood Sediments After Hurricane Helene In Asheville, North Carolina, Abigail Sgan

All Theses

Microplastics are contaminants of emerging concern whose ubiquity across natural environments results in their involvement in many kinds of natural processes, including transportation and deposition in natural systems. The purpose of this thesis is to characterize microplastics and determine the mechanisms that affect their distribution, transport, and sequestration within known Hurricane Helene flood deposits in fluvial and Southern Appalachian wetland environments after Hurricane Helene in Asheville, North Carolina. Four fluvial and four Southern Appalachian wetland environments were sampled after Hurricane Helene. Samples collected in fluvial environments were taken as grab samples from surficial sandy flood deposits left behind by flooding …

Sea-Level Rise Perceptions And Adaptation Strategies In South Carolina’S Coastal Tourism Destinations: Perspectives Of State And Local Officials, Tzu-Hsuan Tseng

All Theses

Sea-level rise poses a significant threat to coastal communities worldwide, yet understanding of how governance systems respond to this slow-onset hazard remains limited. This qualitative study examined how state and local government officials in South Carolina perceive sea-level rise risks and develop adaptation strategies in coastal tourism destinations.

Drawing on Resilience Theory and employing a phenomenological interviewing approach, this research analyzed perspectives from three South Carolina Office of Resilience officials and five local officials responsible for Myrtle Beach, Charleston, and Hilton Head Island. Data were analyzed using Reflexive Thematic Analysis.

Five key themes developed: First, officials acknowledge sea-level rise with …

Characterization, Transport Modeling, And Image Analysis Of Rover-Terrain Interaction For Lunar Regolith In-Situ Resource Utilization, Luke A. Manolescu

All Theses

NASA has declared a return to the lunar surface and the need and demand for sophisticated In-situ Resource Utilization (ISRU) is the highest in history. ISRU will require regolith excavation, transport, and processing in order to harvest the valuable resources available, support surface operations, and keep astronauts alive. Characterizing the lunar regolith is essential to understanding the mechanical and physical behavior of the material that will be used to construct berms and structurally support astronaut habitats and landers. Any construction on Earth requires an in-depth geotechnical site assessment prior to any construction to rule out any potential site issues that …

Evaluation Of High Temperature Thermal Energy Storage At A Field Site, Samuel R. Jennings

All Theses

A pilot-scale high-temperature thermal energy storage site has been developed at Clemson University and began operation in April 2025. High-temperature heat transfer fluid is circulated through a hexagonal array of borehole heat exchangers, which are installed up to 35 ft deep in the subsurface. The thermal energy is stored in the ground and is extracted by circulating the heat transfer fluid at a lower temperature. This test was expected to last more than six months and there was no way to evaluate the temperature data being measured. Since only temperature was being monitored, it was difficult to predict when key …

Evaluating Pfas And Marine Microbial Interactions In Estuarine Sediments With Varying Urbanization And Assessments Of Microbial Responses To Pfos, Zachary J. Padgett

All Theses

Per- and polyfluoroalkyl substances (PFAS) are a diverse class of synthetic chemicals that have become globally distributed due to their extensive use in industrial and consumer products and their extraordinary resistance to environmental degradation. Their persistence and documented toxicity have made them a growing concern in coastal environments, particularly in estuaries where urban runoff, wastewater, and industrial discharges concentrate these compounds. Estuaries are unique in that tidal mixing and interactions with fine-grained sediments and organic matter promote PFAS retention, while the microbial communities living directly within estuarine sediments are positioned where PFAS preferentially accumulate, creating conditions for prolonged exposure and …

The Aggregation Of Microplastics By Enhancing Extracellular Polymeric Substance Production In Pseudoalteromonas Sp. Ncimb 2021 To Improve Removal Efficiencies In Environmental Matrices, Janelle L. Mercer

All Theses

Microplastics (MP) are ubiquitous in the natural environment and are a growing threat due to their small size and durability. Plastics are released into the environment through improper waste management, wastewater treatment outfalls, industrial spills, agricultural runoff, and landfills. These particles breakdown into secondary MP through degradation pathways. MP, less than 5 mm, require intricate removal techniques from water systems. Filtration techniques, though viable and effective, have implementation constraints due to high cost, maintenance demands, and filter fouling. By integrating coagulation and flocculation processes prior to filtration, MP removal efficiencies can increase, while minimizing operational challenges during filtration. Extracellular polymeric …

Evaluation Of Ostomy Pouching Change Practices Among Hospital-Based And Community-Based Nurses, Hannah Gerlach

All Theses

An estimated 725,000 to 1 million Americans are living with an ostomy and depend on ostomy pouching systems as part of their daily care. Effective ostomy management requires regular pouch changes and consistent skin care to prevent peristomal skin complications. Many individuals living with an ostomy face long-term challenges in managing their ostomy care, which can negatively affect their health-related quality of life. There is a need to understand how professional experience across different care environments, such as hospital-based and community-based settings, influences ostomy nursing care practices.

This study evaluates how nurses working in hospital-based settings and community-based settings perform …

What Makes A Cozy Game Cozy? Looking Through The Lens Of Feminism And 4e Cognition, Mary Catherine M. Wilcox

All Theses

Why do some games feel cozy, and others miss the mark, even if they are tricked out in bright colors and festooned with bows? This thesis examines the emerging genre of “cozy games” to better understand why some titles successfully evoke comfort and relaxation while others fail, despite relying on conventionally cute aesthetics or farming-sim mechanics. Although cozy games have grown rapidly in popularity over the past decade, the genre remains under-studied and is often dismissed as frivolous, reflecting the broader historical devaluation of media associated with women. Accordingly, this study argues that understanding cozy games requires examining women’s relationship …

Evaluating The Potential For Chain Elongation To Produce Medium Chain Carboxylates From Anaerobic Conversion Of Lipids, Erin Boyer

All Theses

Medium Chain Carboxylates (MCCs), including caproate and caprylate, are valuable chemicals in various industries that can be produced biologically through an identified chain elongation pathway called reverse β-oxidation. During lipid degradation in anaerobic co-digesters at wastewater treatment plants, methane production is maximized to ensure the successful breakdown of the lipids. It remains unclear whether the anaerobic conversion of lipids possesses the potential to produce MCCs, and this study sought to evaluate the potential using anaerobic co-digester sludge from a full-scale wastewater treatment plant. Batch assays were conducted using the sludge from the plant as inoculum, as well as palmitic acid, …

Electrokinetic Flow Instabilities In Non-Newtonian Fluids With Conductivity Gradients, Md Mainul Islam

All Theses

Electrokinetic instabilities (EKI) arise in electrically driven flows because the applied electric field interacts with spatial variations in electrical conductivity, generating electric body forces that can destabilize fluid interfaces. EKI can be beneficial by enhancing mixing in microchannels where diffusion is slow, but it can also be detrimental by disrupting stable sample transport, focusing, and separation. EKI has been widely studied in Newtonian fluids, and the electric Rayleigh number is known to govern the onset of this instability. However, very few studies have examined its behavior in non-Newtonian fluids, despite their prevalence in biological, chemical, and industrial applications. 

This thesis …

Understanding The Potential Sources Of Bacteria And Turbidity Pollution In The Edisto Island Watershed, Brynne Sumner

All Theses

Anthropogenic pollution introduces contaminants, such as pathogenic bacteria and turbidity, into coastal watersheds. These contaminants are the major contributors to water quality impairments in the three sub-watersheds encompassing Edisto Island and the Town of Edisto Beach (hereafter referred to as the Edisto Island Watershed), located within the ACE Basin, South Carolina, USA. With 18 locations impaired for fecal bacteria and 19 for turbidity on the 2024 South Carolina 303(d) list of impaired waters, the Edisto Island Watershed offers valuable insights into the water quality challenges rural coastal communities face.

This study aimed to identify the sources of fecal bacteria and …

Implementation Of A Practical Sharp Interface Saltwater Intrusion Model To Assess Future Sea-Level Impacts, Alexandra G. Defalco

All Theses

Rising sea levels caused by global warming exacerbate saltwater intrusion, the inland movement of seawater into coastal aquifers. These processes increase susceptibility to freshwater contamination, surface flooding, and infrastructure damage. Numerical models are utilized to assess hazards to coastal aquifers on a regional scale.

The U.S. Navy is currently developing a robust, reduced-order groundwater modeling platform, SWI6, that uses the sharp interface approach to approximate the location of the freshwater-saltwater interface to define the extent of saltwater intrusion within an aquifer. Featuring compatibility with MODFLOW 6 unstructured grid formats and the Newton-Raphson formulation for better solution stability, SWI6 improves upon …

Price, Property Rights, And Local Generation: A Transaction Cost Analysis Of Microgrid Statutes, Devon A. Downes

All Theses

In most U.S. states, public utility regulation and legal ambiguity has deterred entry into electricity markets by microgrid developers. Since 2012, seven states have enacted statutes that alter the regulatory environment, either by exempting microgrid operators from public utility classification or by directing regulatory agencies to establish the interconnection and compensation frameworks that make entry viable. I empirically analyze the determinants and effects of state statutes that authorize freedom of entry for microgrid developers. Using a pooled panel OLS with state and year fixed effects on annual data for all 50 states and the District of Columbia from 2016 through …

Evaluation Of Ostomy Pouching Change Practices Among Hospital-Based And Community-Based Nurses, Hannah Gerlach

All Theses

An estimated 725,000 to 1 million Americans are living with an ostomy and depend on ostomy pouching systems as part of their daily care. Effective ostomy management requires regular pouch changes and consistent skin care to prevent peristomal skin complications. Many individuals living with an ostomy face long-term challenges in managing their ostomy care, which can negatively affect their health-related quality of life. There is a need to understand how professional experience across different care environments, such as hospital-based and community-based settings, influences ostomy nursing care practices.

This study evaluates how nurses working in hospital-based settings and community-based settings perform …

Exploring The Paradoxical Association Between Chest Ct Pulmonary Involvement And Olfactory Dysfunction In Covid-19 Patients: A Prospective Cross-Sectional Study, Abdolkarim Ghadimi-Moghadam, Saed Askari, Mohammad Amin Ghatee, Alireza Mortazavi, Saeed Javdansirat, Ali Ghadimi Moghadam, Hassan Vafapour, Zaker Salehi, Seyed Mohammad Javad Mortazavi, Lembit Sihver

Informatics and Engineering Systems Faculty Publications

Background and Aims: Olfactory dysfunction (OD) is common in COVID-19, yet its relationship with pulmonary involvement remains inconsistent. We evaluated the association between CT-based lung involvement and OD in laboratory-confirmed COVID-19.

Methods: In a prospective cross-sectional study (Yasuj University of Medical Sciences hospitals; December 26, 2021–May 22, 2022), OD was assessed using the CCCRC protocol and pulmonary involvement was categorized using a CT lung involvement score. Associations were examined using chi-square testing (categorical) and ANOVA where appropriate (α = 0.05).

Results: Among 120 patients (60 male/60 female; mean age 43.17 ± 14.76 years), 71 (59.2%) had hyposmia, and none had …

Identification And Development Of Improved Monitoring For Wildlife-Vehicle Collisions In North Dakota, Lawson Frey

Theses and Dissertations

Wildlife-vehicle collisions (WVCs) represent a significant ecological and public safety concern across the United States, yet data collection systems in many states remain insufficient to capture the true magnitude and taxonomic breadth of collision-related mortality. North Dakota, where WVCs account for approximately 18% of all reported crashes, relies almost exclusively on law enforcement collision reports governed by high property damage thresholds, a protocol that systematically excludes the majority of species and underestimates total mortality. This study addresses these data gaps through three complementary approaches conducted in North Dakota from 2021 to 2025. First, we conducted systematic weekly carcass surveys across …

Geographic 3d-Digital Preservation Tools And Applications In Heritage Tourism, Ricardo Alejandro Gomez-Nieto

Theses and Dissertations

This thesis is more a micro-case study than usual in historical geography focused on land use change, historic preservation, heritage tourism, and informal education at the Grand Forks County Historical Society Museum Village in Grand Forks, North Dakota. The research questions focused on the interconnections of the relationships among people’slocation value, the reinterpretation of the location through historical lenses, and the sequence occupance of the area. The research methodology was grounded in traditional themes of historical geography and was a mixed methods style of data collection and data analysis. The tools of inquiry emphasized the use of 3D imaging, aerial …

Impact Of Active Learning On Student Performance In An Introductory Atmospheric Science Laboratory Course, Kassidy Danae Kjos

Theses and Dissertations

Little investigation into pedagogy in atmospheric sciences has been conducted. While numerous studies across STEM disciplines have examined and demonstrate active learning (AL) is beneficial to student performance, fewer than fifty explored atmospheric sciences specifically. This study expands upon these few existing studies by evaluating a diverse set of AL strategies implemented into introductory meteorology laboratories. Five AL techniques (Think-Pair-Share, Game-Based, Role-Playing, Diagramming, and Gallery Walks) were implemented between two semesters across multiple laboratory sections. Student performance is analyzed using the laboratory and its accompanying lecture curriculum assessments, as well as through pre- and post-tests. Results indicate students exposed to …

Dual Credit In North Dakota: High School Administrators’ Perceptions And Experiences, Kayla Marie O'Toole

Theses and Dissertations

Dual credit opportunities continue to expand across North Dakota, providing high school students with opportunities to earn college credit while completing high school coursework. Despite this growth, participation in dual credit varies among high schools across the state. The purpose of this study was to examine high school administrators’ perceptions and experiences regarding dual credit programming in North Dakota. The study was guided by the following research question: What perceptions about dual credit exist among high school administrators, and what are their experiences?This study used a survey-based research approach to collect data from high school administrators throughout North Dakota. It …

Testing The Efficacy Of A Non-Invasive, Epidermal, Marker-Based Method For Conducting X-Ray Reconstruction Of Moving Morphology (Xromm) On A Cadaver Chicken, Brian Skillman

Theses and Dissertations

X-Ray Reconstruction of Moving Morphology (XROMM) is widely used to understand the kinematics of living organisms. The first of two standard methods for utlizing XROMM is to surgically implant X-ray dense markers within the bones of interest and euthanize the subject at the conclusion of testing, referred altogether as marker-based. The other standard, known Scientific Rotoscoping, or markerless, involves using thorough videography of the subject and manual bone orientation within the data collection program. These standards both pose unique issues, such as post-surgery complications for marker-based and time constraints for markerless. We investigate an intermediate method for utilizing XROMM involving …

When Does Emigration Reduce Domestic Economic Activities? Evidence On The Loss Of Management Capacity From A Visa Lottery, Marup Hossain, Ahmed Mushfiq Mobarak

Cowles Foundation Discussion Papers

Economic development is often conceived as structural transformation and migration out of rural agriculture (Lewis, 1954; Fei & Ranis, 1964). Understanding development therefore requires us to identify how rural economies transform in response to emigration. We study how international migration reshapes domestic economic activity in origin households using a randomized visa lottery that gave Bangladeshi men job opportunities in Malaysia. Winning the lottery raises total household income through remittances, but income earned in Bangladesh declines due to contractions in nonfarm business activity. In contrast, crop income remains stable despite large reductions in agricultural input expenditures, because farming gets delegated through …

Modeling Intercellular And Intracellular Organization And Dynamics Of The Bacteria Escherichia Coli : From Population Dynamics In The Gut Microbiome, To Condensate Formation In Starved Cells, Alberto Alonso

Theses

Escherichia coli is a predominantly non-pathogenic species of bacteria present in the gut of most healthy adults. It plays a critical role in the health of the gut microbiome and is also widely used as a model organism in microbiology and synthetic biology studies. This thesis discusses results from two ongoing projects on E. Coli organization and emergent biophysical properties at two very distinct length scales. The first project focuses on using genetically modified engineered E. coli bacteria for early detection and intervention in colorectal cancer (CRC), a significant public health issue in the US. The success of these engineered …

Using Ai Strategically For Internship & Job Search: Using Ai To Think Better, Not Just Faster, Hoang Bao Han Tran

Paul English Applied Artificial Intelligence (AI) Institute Publications

This presentation examines how students can use artificial intelligence strategically throughout the internship and job search process while maintaining critical thinking and human judgment. It explores the shift from traditional job-search platforms toward AI-assisted career research, including using personal experience, career goals, leadership activities, and individual context to evaluate potential opportunities. The presentation demonstrates how AI can support students in analyzing job descriptions, identifying relevant skills and qualifications, researching employers, and preparing for interviews. It also distinguishes the role of AI from that of career advisors, emphasizing that AI can help collect and process information while career advisors help students …

Ethical Use Of Ai In Education: Ai-Driven Learning: Good Or Bad?, Moumita Saha

Paul English Applied Artificial Intelligence (AI) Institute Publications

This presentation examines the ethical use of artificial intelligence in education and the opportunities and challenges associated with AI-driven learning. It explores the growing adoption of artificial intelligence, concerns surrounding excessive reliance on generative AI, and issues including privacy, algorithmic bias, misuse of AI, job displacement, transparency, plagiarism, intellectual property, equitable access, and academic integrity. The presentation also considers how AI may affect critical thinking, learning processes, assessment, and student career readiness while highlighting research on the potential of AI to support personalized learning and education. Through case examples, research findings, discussion, and a hands-on group activity comparing work completed …

Ai For Leaders: Co-Design Your Career Workshops, Rami Huu Nguyen

Paul English Applied Artificial Intelligence (AI) Institute Publications

This presentation explores the role of career identity and leadership development in helping students navigate an increasingly AI-driven professional landscape. It introduces a framework for understanding career identity through interests, skills, motivation, experiences, and professional roles, while examining the importance of maintaining individual identity when using artificial intelligence tools. The presentation emphasizes role-based career identity as a strategy for helping students establish direction, develop leadership skills, and remain competitive in the job market. Through an interactive co-design activity, career advisors work in teams to develop career workshops or mini-projects using search engines and AI tools, considering student roles, instructional processes, …

A Review Of The Safety Alert Systems In Commercial Vehicles: Implementation Challenges And Trends For Electronic Logic Devices And In-Cab Alerts, Md Sadman Islam, Deep Patel, Ahmed Sajid Hasan, Mohammad Jalayer, Abdul S. Ngereza, Emmanuel Kidando

Civil and Environmental Engineering Faculty Publications

The trucking industry is crucial to the US economy, accounting for 73.1% of the value, 71.1% of the cargo, and 42.0% of the ton-miles of all commodities transported nationwide. Despite its pivotal role, the industry is affected by high crash rates, with truck crashes resulting in 5,472 fatalities in 2023 alone. These incidents not only exhibit a higher fatality rate per vehicle mile compared with passenger cars but also cause substantial economic disruptions. Predominantly, these crashes are attributed to the failure to stop or slow down because of insufficient sight distances. In recent years, trucking companies have implemented various technologies, …