Digital Commons Network^™

Nitrate Levels In The Tap Water Of Several Northeast Iowa Communities In 2026, Kamyar Enshayan

Faculty Publications

Tap water samples were taken from numerous sites in several northeast Iowa communities along the Cedar River to learn what levels of nitrate people are actually drinking over a several-months period in 2026, with the hope of inspiring public conversations, understanding and action. Samples were taken from February to June 2026.  None of the tap water samples violated the current outdated nitrate limit of 10 mg/l set 35 years ago. However, published public health studies in the past 15 years reveal that consuming nitrate in drinking water at levels as low as 5mg/l for a long time can increase the …

A Longitudinal Multi‑Proxy Geospatial Classification Of Peri‑Urban Transitions Across Community Health Units In Coastal Kenya, Prissy Makena, Felix Oluoch, Rosebella Iseme, Fredrick Gudda, Alfred Keter, Jai Das, Zulfiqar Bhutta, Anthony Ngugi

Population Health, East Africa

Background Urbanization is spatially heterogeneous in many sub-Saharan African settings. This complicates community health planning when rural and peri-urban labels are applied informally or updated inconsistently. We assessed whether multiple publicly available geospatial proxies could characterize settlement dynamics and support Community Health Unit (CHU) level classification within the Kaloleni Rabai Health and Demographic Surveillance System (KRHDSS) in coastal Kenya.

Methods We conducted a longitudinal ecological analysis across 10 CHUs in Kilifi County with annual observations from 2017 to 2024. Five geospatial proxy indicators of settlement intensity were summarized within CHU boundaries: Visible Infrared Imaging Radiometer Suite (VIIRS) nighttime lights radiance, …

Wisdom In Counseling And Psychotherapy: A Conceptual Model For Practice, Mitchell Waters

Papers

Wisdom is increasingly recognized as a critical construct in counseling and psychotherapy, yet it remains conceptually diffuse and underdeveloped for clinical application. This article proposes an integrative conceptual model of wisdom that extends the Dialectical Behavior Therapy (DBT) WISE MIND framework by incorporating temporal and self-transcendent dimensions. Wisdom is defined as a dynamic, context-sensitive capacity to coordinate cognitive, affective, temporal, and spiritual processes in response to complex life demands. The model includes four components: (a) cognitive–affective integration, reflecting the synthesis of emotion and reason; (b) temporal integration, involving adaptive coordination of past experiences and future possibilities; (c) self-transcendent orientation, conceptualized …

Transfusion Intensity In The Icu: Reasons And Triggers, Merijn Reuland, Senta Raasveld, Jimmy Schenk, Claudia Oord, Sanne Bruin, Caroline Schaap, Andrew Flint, Jan Bakker, Maurizio Cecconi, Marcus Lance

Anaesthesiology, East Africa

Background The reasons and physiological triggers for blood transfusion in critically ill patients are not well characterized. Beyond hemoglobin levels, hemodynamic instability is frequently cited, but its role across clinical contexts remains unclear.

Aims (1) To determine whether reasons and triggers for RBC transfusion differ across intensive care unit (ICU) days with varying transfusion intensity. (2) To describe reasons for non-RBC transfusions across these intensity groups.

Methods This sub-study of the prospective International Point Prevalence Study of Intensive Care Unit Transfusion Practices (InPUT) classified ICU days by transfusion intensity: nonmajor (1 RBC unit), major (≥2 units), and massive (≥6 units …

Trauma: Cervical Spine Clearance, Children's Mercy Kansas City

Clinical Pathways

No abstract provided.

Bpsou Grove Gulch Sedimentation Bay Draft Remedial Action Construction Completion Report (Ccr), Woodard & Curran

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

A Comparison Of Survival, Growth, And Stress Resilience In Three Different Lineages Of The Pacific Oyster (Crassostrea Gigas) Farmed On The California Central Coast, Victoria F. Hanshaw

Master's Theses

Aquaculture of Pacific oysters on the US West Coast is routinely impacted by seasonal unexplained mortality events. To better understand these large-scale mortality events in oyster aquaculture, shellfish growers and scientists in California have partnered together to conduct comparative, multi-estuary farm trials of discrete Pacific oyster (Crassostrea gigas) lineages. In this thesis we investigate how the more recently imported Midori lineage performs compared to the historically used Miyagi lineage, as well as a Hybrid (Midori x Miyagi) lineage. As part of a 7-month long field study from April-November of 2024 in Morro Bay and Tomales Bay, California, we evaluated …

Electromagnetic Enhancement Of A Potassium-Seeded Rotating Detonation Engine, Anthony Joseph Presto Jr.

Master's Theses

Rotating detonation engines offer a route to pressure-gain combustion by sustaining one or more detonation waves in an annular chamber supplied by continuous propellant injection. This thesis evaluates whether potassium seeding can make the high-temperature product flow of a hydrogen–air rotating detonation engine conductive enough to serve as the working fluid for magnetohydrodynamic acceleration. To the author’s best knowledge, the complete configuration modeled here has not been reported previously in open literature. This configuration consists of a hydrogen–air RDE with KOH-based potassium seeding, local conductivity estimates, and imposed Lorentz-force acceleration. The thesis therefore develops an initial computational model for this …

Prompt-Driven Tabletop Robotic Manipulation With A Structured Llm Interface And Visual Verification, Tomas Franco

Master's Theses

Creating a tabletop robotic manipulation system that connects language goals to robot actions is a challenging problem. Large language models can interpret mission objectives and reason through actions, but when placed directly in control of hardware they can produce hallucinated commands that result in unsafe behavior without the proper safeguards.

This thesis presents a constrained LLM-guided manipulation system built around the Quanser Qarm, a four degree of freedom manipulator with a mounted Realsense RGB-D camera and a gripper with readable current. Every decision made by the LLM planner is routed through a gated command interface that restricts the model to …

The Effect Of Specialty Malt On Dry-Hopping, Alexander Kivela

Master's Theses

Dry-Hopping is a modern and ever-increasing method to add hoppy flavors to beer. This is typically seen in pale ales and India Pale Ales (IPA’s). Most research has investigated the effect of dry-hopping only using pale malt, whereas most breweries used specialty malts to create a malty backbone to their beer.

The objectives of this research were to analyze the impact of specialty malts and their concentration on the efficacy of hop flavor and extraction, determined via gas chromatography and sensory analysis. Gas chromatography analysis was modeled after the ASBC Method Beer-48. Sensory analysis was performed via the 15cm line …

Hardware-In-The-Loop Evaluation Of Sensor-Source Selection For Prosthetic Locomotion Intent Recognition, Victoria Asencio-Clemens

Master's Theses

Active lower-limb prostheses use intent-recognition systems to identify a user’s locomotion mode and select an appropriate control strategy, but sensor configurations that perform well offline may be unsuitable for resource-constrained embedded hardware. Existing sensor-selection methods generally prioritize classification accuracy without directly accounting for processing latency, memory usage, or other hardware-dependent requirements. To address this limitation, this thesis develops a hardware-in-the-loop source-selection framework for embedded classification of level walking, ramp ascent, ramp descent, stair ascent, and stair descent using multimodal biomechanical data from transtibial amputee participants. Subject-specific linear support vector machine classifiers were evaluated using trial-held-out validation, and candidate configurations from …

Predicting Student Belonging In Computing Education: A Multimodal Machine Learning Approach Using Eeg And Survey Data, Hannah Moshtaghi

Master's Theses

Measuring students’ sense of belonging, characterized by feelings of acceptance, inclusion, and encouragement from teachers, remains a significant challenge in computing education. Prior research has associated this multidimensional construct with positive academic outcomes and has identified instructors’ growth- and fixed-mindset messaging as a potential influence. However, belonging is a complex and deeply personal experience that is difficult to capture through direct observation alone. Current measurement methods rely on self-report surveys, which may not capture every aspect of an experience that can also involve emotional and cognitive responses.

This thesis investigates whether combining EEG data recorded during a belonging questionnaire with …

Baseline Nutrition Knowledge And Feasibility Of A Whatsapp-Delivered Nutrition Education Intervention Among California Wildland-Urban Interface Firefighters, Lauren E. Anderson

Master's Theses

Wildland firefighters perform physically demanding work under challenging environmental conditions that place substantial demands on nutritional health and occupational performance. Despite the importance of nutrition in supporting physical performance, recovery, and long-term health, limited research has examined nutrition knowledge and dietary behaviors among California wildland firefighters or evaluated the feasibility of remotely delivered nutrition education interventions within this occupational population. Therefore, the purpose of this pilot study was to assess baseline nutrition knowledge, nutrition self-efficacy, and dietary behaviors while evaluating the feasibility of a 12-week WhatsApp-delivered nutrition education intervention among California wildland firefighters.

Twenty-four firefighters completed the baseline assessment and …

Beyond Beliefs: Factors That Shape Agricultural Plastic End-Of-Life Management Among California Strawberry Growers, Kyle Y. Cahitas

Master's Theses

The practice of using plastics in agriculture is so prevalent it has earned its own name: plasticulture. One key plasticulture tool is polyethylene (PE) mulch film, a thin plastic sheet laid over the field for a single growing season and pulled out before the next. Because PE film is hard to recycle, most of it ends up in a landfill, yet how growers decide what happens to used plastic mulch has rarely been studied. To identify what shapes that decision, this study draws on a survey of California strawberry growers (n = 126). Twenty variables, spanning grower attitudes, farm characteristics, …

Expected Structural Damage, Residual Capacity, And Repairability Of Light-Frame Timber Houses, Mikayla Caruthers

Master's Theses

Earthquake damage in light-frame timber structures is commonly evaluated using peak inter-story drift. However, drift alone does not fully represent the remaining structural capacity of a building or its ability to be repaired following a seismic event. Although expected structural damage, residual capacity, and repairability have each been studied extensively, these concepts are often considered independently, leaving limited guidance that links them within a unified post-earthquake assessment methodology.

This thesis establishes an integrated framework that relates expected structural damage, residual capacity, and repairability for light-frame timber residential structures. Existing literature was synthesized to develop drift-based damage-state classifications, identify methods for …

Synthesis And Characterization Of Carbon Quantum Dots And Gold Nanoparticles For Norovirus Biosensing Applications In Water Systems, Breanne Evans

Master's Theses

Rapid, reliable detection of viral pathogens remains a significant challenge across water-treatment and environmental monitoring systems, including drinking-water, wastewater, water reuse, and environmental surveillance applications. Waterborne viral contamination can pose substantial public-health risks, making early detection essential for protecting water quality and responding quickly to treatment failures or contamination events. Direct potable reuse (DPR) is one particularly demanding example because it requires continuous verification of treatment performance and the broader need for rapid virus monitoring extends across many water-treatment and environmental surveillance applications. Norovirus is a priority target because of its widespread occurrence in wastewater, environmental persistence, and exceptionally low …

A Technoeconomic And Lifecycle Analysis Of Catalytic Non-Thermal Plasma Steam Methane Reforming For Renewable Hydrogen Production, Gustav M. King

Master's Theses

When produced with sufficiently low life-cycle emissions, hydrogen may support low-carbon, dispatchable electricity generation to realize statewide renewable energy regulatory objectives. This thesis develops a screening-level electrothermochemical process model of catalytic non-thermal plasma steam methane reforming (CNTP-SMR) and integrates it with techno-economic and life-cycle assessments. Biogas and natural gas fed CNTP-SMR scenarios are compared with conventional steam methane reforming to evaluate hydrogen production cost, global warming potential, and the effects of key operating parameters. Under the baseline assumptions, CNTP-SMR generated hydrogen at a higher levelized cost (baseline of $3.86/kg H₂ and a range of $3.68 to $4.11) when compared …

Role Of Stigma On Engagement In Mental Health Services For Latinxs With First-Episode Psychosis (Fep), Livia J. Padron Briceno

Electronic Theses, Projects, and Dissertations

Psychotic patients often endure stigma in their daily lives (Corrigan, 2018). Psychotic patients are understood as individuals who are experiencing psychotic symptoms such as hallucinations, delusions and disorganized speech (Arciniegas, 2015; Breitborde et al., 2017; Moskowitz et al., 2019) and have been diagnosed according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria with a psychotic disorder (e.g. Schizophrenia, Schizoaffective Disorder). Stigma refers to negative perceptions held about an individual experiencing mental illness. While public stigma refers to the negative views adhered to by members of communities (e.g., sociocultural group, family units) about people with mental illness, self-stigma …

Comparing 3-Connectedness And Roundness In Matroid Theory, Blanca Delia Larios

Electronic Theses, Projects, and Dissertations

A matroid is a discrete mathematical object that abstracts and connects the various notions of independence found throughout mathematics. Such notions of independence include linear independence, algebraic independence, as well as notions of independence that arise in graph theory. There are many broad classes of matroids. Important examples include binary matroids, graphic matroids, regular matroids, uniform matroids, and various levels of connected matroids. Some of the most important problems in matroid theory involve characterizing classes of matroids so that such characterizations can be used to prove results concerning these matroid classes. This thesis is a study of two important classes …

The Relativity Of Education: Student Perspectives On Artificial Intelligence In Community College, Ashley Greta Magana

Electronic Theses, Projects, and Dissertations

This hermeneutic phenomenological study examined how diverse community college students experience and make meaning of the integration of generative artificial intelligence (AI) into their educational contexts. Although AI is quickly transforming higher education through automated grading, personalized learning systems, and new models of assessment, the discourse surrounding its implementation remains dominated by administrators, faculty, and institutional stakeholders, while the perspectives of students, specifically community college students who are often historically underrepresented and economically marginalized, are systematically excluded. Most existing research is quantitative and centered on universities, leaving a critical gap in qualitative understanding of the most diverse population in higher …

A Culturally Responsive Sexual Health Education Framework For Community Clinics In The Inland Empire, Lilianna Mora Ledezma

Electronic Theses, Projects, and Dissertations

Sexually transmitted infections (STIs) continue to disproportionately affect underserved communities, where barriers such as limited healthcare access, stigma, healthcare anxiety, medical mistrust, and language differences may discourage individuals from seeking routine screening and timely treatment. This project examined current public health literature, surveillance data, and federal guidance to identify evidence-based strategies that community clinics can implement to improve patient engagement in sexual health services. The findings demonstrated that effective STI prevention extends beyond testing alone and is strengthened through culturally responsive care, stigma reduction, patient-centered communication, standardized clinic workflows, and effective patient navigation. As a result, this project developed a …

Genocide As Patriotic Duty: The Outcomes Of Ultranationalism And Dehumanization From World War Ii Genocide Orchestrators, Corie R. Blais

Electronic Theses, Projects, and Dissertations

The thesis provides a contribution to the field of history how nationalism

often transforms individuals during wartime to become dehumanizing

ultranationalists through patriotism and its connection to genocide.  Also, it gives

insight into the many ways that genocide orchestrators during World War II,

relied on propaganda of racism, religion, and “othering” in order to justify their

incentives to expand territories and dehumanize victims through medical

experimentations and sexual violence.  While research materials in the context of

Nazi Germany were ample, one challenge in my research was finding

documentations on Stalin’s People Commissariat of Internal Affairs (NKVD)

police unit which carried …

Comparative Assessment Of Developmental Fidelity In Hpsc-Derived Neural Crest Cells, Michael H. Zepeda

Electronic Theses, Projects, and Dissertations

Neural crest cells (NCCs) are a transient, multipotent cell population that contributes to craniofacial structures, peripheral neurons, melanocytes, and smooth muscle. Defects in NCC development underlie a broad range of congenital disorders known as neurocristopathies. Human pluripotent stem cell (hPSC)-derived NCCs provide an evaluable model for studying early human development; however, existing differentiation protocols produce variable outcomes, and no standardized method consistently generates high-fidelity NCC populations. To address this challenge, we compared five published hPSC-to-NCC differentiation protocols using the H9 human embryonic stem cell line. We hypothesized that specific protocols more faithfully recapitulate neural crest development through coordinated regulation of …

How Establishing "Duration Of Treatment" Guidelines Shortens Workers' Compensation Cases, Annette Marie Smith M.D.

Electronic Theses, Projects, and Dissertations

Jobs provide financial security for individual workers and their families in the community until a worker gets hurt on the job, and then things are up in the air until their workers’ compensation claim is approved. It is a well-known fact within the workers compensation literature that one third of all workers’ compensation (WC) claims are “low back sprains and strains” which are the leading cause of global disability (Ummey, 2023). This project proposed to explore the relationship of x-ray and MRI result interpretations by the physician and standardize the duration of treatment with a physical therapist and new concept …

Greenhouse Gas Flux Response In Biochar- And Compost-Amended Lawn Soils Under Simulated Water Saturation Conditions, Angel Salinas, Chu-Lin Cheng, Engil Pereira, Rafael M. Almeida, James Jihoon Kang

School of Earth, Environmental, & Marine Sciences Faculty Publications

Understanding greenhouse gas emission dynamics in lawn soils is important for improving climate change mitigation strategies in urban and suburban landscapes. In this greenhouse mesocosm study, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes were measured from 12 turfgrass soil columns arranged in an unreplicated, completely randomized 4 × 3 factorial design. Four amendment treatments (biochar, compost, bio-com [1:1 volume ratio of biochar and compost], and unamended control) were combined with three water-table conditions (full saturation, half saturation, and unsaturated), with a single column representing each treatment combination. Columns were irrigated at 1 cm day−1 for 24 days, …

An Integrated Model For Post-Hurricane Displacement, Shelter Demand And Shelter Allocation, Nirmal Adhikari

All Theses

This thesis develops an integrated tract-level framework for estimating post-hurricane displacement, short-term shelter demand, long-term shelter demand, and shelter allocation under hurricane wind hazards. The framework combines parametric wind-field modeling based on HURDAT2 and EBTRK hurricane data with HAZUS-based fragility and loss functions, uninhabitability relationships, demographic factors, and an insurance-sensitive recovery model. Tract-level insurance adequacy is estimated using American Community Survey data, National Association of Insurance Commissioners premium data, and the National Risk Index, using five scenario-based models; the combined home-value and hazard-risk model is adopted for final analyses. To evaluate post-disaster housing capacity, the study estimates the number of …

Painting A Scene: 3d Painterly Rendering From Curves To Rebelle, William M. Luttrell

All Theses

Stylized 3D rendering has seen much development and success over the past few years. From Spider-Man: Across the Spider-Verse to The Bad Guys, many studios have developed tools to incorporate stylistic elements from graphic novels, comic books, watercolor paintings, and more into their productions. This stylization process incorporates the pacing, visual style, and themes from the source medium into the animated work, allowing a much greater freedom of expression for artists and directors.

Inspired by these films as well as the needs of the short film Kate Shelley and the Bridge of Darkness currently in production, This paper presents …

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 …

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 …

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 …