Digital Commons Network^™

Examining Equitable Participation With K-12 Teacher Leaders, Eva Thanheiser, Kathryn Elizabeth Roman, Ruth Heaton

Mathematics and Statistics Faculty Publications and Presentations

Many organizations and researchers in mathematics education call for antibias practices, but addressing hidden biases remains challenging. Equity QUantified In Participation (EQUIP), a quantitative tool designed to analyze classroom participation patterns by social markers, helps teachers identify these subtle inequities. This paper describes a professional development (PD) intervention introducing EQUIP to five teacher leaders (TLs) and three coaches in a predominantly Latine district, focusing on setting up EQUIP to identify and address participation inequities in their classrooms. The TLs implemented EQUIP in their classroom and gathered participation data twice. Findings revealed that TLs took up EQUIP in different ways and …

Direct Coupling Of Continuum And Shell Elements In Large Deformation Problems, Astrid Pechstein, Michael Neunteufel

Mathematics and Statistics Faculty Publications and Presentations

In many applications, thin shell-like structures are integrated within or attached to volumetric bodies. This includes reinforcements placed in soft matrix material in lightweight structure design, or hollow structures that are partially or completely filled. Finite element simulations of such setups are highly challenging. A brute force discretization of structural as well as volumetric parts using well-shaped three-dimensional elements may be accurate, but leads to problems of enormous computational complexity even for simple models. One desired alternative is the use of shell elements for thin-walled parts, as such a discretization greatly alleviates size restrictions on the underlying finite element mesh. …

The Discontinuous Petrov–Galerkin Method, Leszek Demkowicz, Jay Gopalakrishnan

Mathematics and Statistics Faculty Publications and Presentations

The discontinuous Petrov–Galerkin (DPG) method is a Petrov–Galerkin finite element method with test functions designed for obtaining stability. These test functions are computable locally, element by element, and are motivated by optimal test functions which attain the supremum in an inf-sup condition. A profound consequence of the use of nearly optimal test functions is that the DPG method can inherit the stability of the (undiscretized) variational formulation, be it coercive or not. This paper combines a presentation of the fundamentals of the DPG ideas with a review of the ongoing research on theory and applications of the DPG methodology. The …

Expanding And Mainstreaming Sociohydrology Toward Transdisciplinary Praxis, Shinichiro Nakamura, Heidi Kreibich, Melissa Haeffner, Jenia Mukherjee, Giuliano Di Baldassarre, Maiko Sakamoto, Mikiko Sugiura, Günter Blöschl, Taikan Oki, Murugesu Sivapalan

Environmental Science and Management Faculty Publications and Presentations

Since its development in the early 2010s, sociohydrology has deepened our understanding of the long-term coevolution of humans and water by integrating insights from both the natural and social sciences, while also fostering an interdisciplinary community. Its modus operandi to date has been to focus on emergent phenomena, manifesting as unintended consequences, in a variety of contexts. The compound disaster that struck Japan’s Noto Peninsula in 2024, and similar experiences in other parts of the world, underscore the urgent need for systemic approaches that are co-developed by academia and practitioners and focus on context-specific solutions. This perspective piece thus calls …

Robust Contraction Decomposition For Minor-Free Graphs And Its Applications, Bandyapadhyay Sayan, William Lochet, Daniel Lokshtanov, Dániel Marx, Pranabendu Misra, Multiple Additional Authors

Computer Science Faculty Publications and Presentations

We prove a robust contraction decomposition theorem for H-minor-free graphs, which states that given an H-minor-free graph G and an integer p, one can partition in polynomial time the vertices of G into p sets Z₁,… ,Z_p such that tw(G/(Z_i ⧵ Z')) = O(p + |Z'|) for all i ∈ [p] and Z' ⊆ Z_i. Here, tw(⋅) denotes the treewidth of a graph and G/(Z_i ⧵ Z') denotes the graph obtained from G by contracting all edges with both endpoints in Z_i ⧵ Z'. Our result generalizes earlier results by Klein [SICOMP 2008] and Demaine et al. [STOC 2011] based …

Illuminating Two Secondary Schoolteachers’ Praxes On A ‘Terrain Of Freedom:’ Lessons For Teacher Education, Paul Tarc, Nicholas Ng-A-Fook, Tasha Ausman, Catherine James

Northwest Journal of Teacher Education

This paper attunes to the stated focus of this special issue—teacher subjectivities on a terrain of freedom—to consider the qualities, possibilities and limits of teachers’ praxes and development upon this ‘terrain.’ In response to the call, we explore three critical questions: 1) Where does the teacher’s freedom lie amidst required protocols and standardization?; 2) Can teachers transcend how they have been conceived and conditioned?; and 3) How can teachers engage in transformative development? Through a "poetics of teaching," inspired by Hansen (2004), we frame teaching as a curricular and pedagogical art form that melds interdisciplinary, intellectual, aesthetic, and …

Potent Acridone Antimalarial Against All Three Life Stages Of Plasmodium, Papireddy Kancharla, Rozalia A. Dodean, Yuexin Li, Xiaowei Zhang, Sean Kelly, Jordan Charlton, Angley Binauhan, Laurize Garcia, Diana Caridha, Jane X. Kelly, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

New antimalarial therapeutics ideally should target all three major life cycle stages. Here we present an acridone antimalarial chemotype that is potent against blood, liver, and mosquito stages of malaria parasites, with the potential for single-dose cure of bloodstream infections, radical cure of liver infections, and blocking of transmission to mosquitoes. Attributes of lead candidate T111 include potent in vitro activity against cultured parasites, ex vivo activity against clinical isolates, oral single dose cure in an asexual blood stage rodent model, inhibition of sexual blood stage parasites, activity against relapsing parasites in non-human primate liver cells, prevention of parasite development …

Bahadur Representations For Canonical Quantile Regression: A Correction And Extension, Stephen Portnoy

Mathematics and Statistics Faculty Publications and Presentations

Portnoy (2022) introduced a version of Canonical Correlation anal- ysis based on Regression Quantiles. The proof of the asymptotic convergence of the estimators contained some gaps. A new proof is developed using Bahadur representations to obtain asymptotic represen- tations for the Canonical Regression Quantile components with error uniformly O_p (n^-1/4 log n). These innovative representations justify approximations and automatically provide joint convergence in dis- tribution. This enables an inductive argument to obtain asymptotic results for all components. These novel Bahadur approximations may have more general application and interest.

Homework, Households, And Hurdles: The Unexpected Drivers Of Student Graduation Perceptions, Daniel Alhassan, Zahra Fatah, Priscilla Mansah Codjoe, Caroline Bena Kuno, Dorcas Ofori-Boateng

Mathematics and Statistics Faculty Publications and Presentations

Students’ perceptions of their likelihood to graduate are important determinants of their academic engagement, yet these perceptions remain understudied. This study, which is based on the 2021 Monitoring the Future survey of 8th- and 10th-grade students in the United States, uses machine learning algorithms to identify the most important factors that influence these perceptions. Among the tested models, random forest provided the best classification performance. Using permutation-based feature importance, we identified frequent participation in schoolwork, maternal education, paternal education, and homework completion as the most important predictors of students’ graduation perceptions. These results highlight the importance of targeted and well-coordinated …

Kolmogorov–Smirnov-Based Edge Centrality Measure For Metric Graphs, Christina Durón, H. Kravitz, Moysey Brio

Mathematics and Statistics Faculty Publications and Presentations

In this work, we introduce an edge centrality measure for the Helmholtz equation on metric graphs, a particular flow network, based on spectral edge energy density. This measure identifies influential edges whose removal significantly changes the energy flow on the network, as indicated by statistically significant p-values from the two-sample Kolmogorov–Smirnov test comparing edge energy densities in the original network to those with a single edge removed. We compare the proposed measure with eight vertex centrality measures applied to a line graph representation of each metric graph, as well as with two edge centrality measures applied directly to each …

Population Genomic Investigation Of The Oregon Slender Salamander (Batrachoseps Wrighti) Reveals Suburban Populations Are Remnants, Not Recent Introductions, Clare Yang, Laura Guderyahn, Charlotte Corkran, Steven Wagner, Lauren M. Chan

Environmental Science and Management Faculty Publications and Presentations

In the face of urbanization and anthropogenic change, some native species persist while others are lost. Understanding native populations, particularly in marginal habitat, can lend insights into the effects of habitat change. The Oregon Slender Salamander (Batrachoseps wrighti) is endemic to the late-successional forests of the Cascade Range in Oregon and has declined due to land use change. In 2007, several populations of the Oregon Slender Salamander were found within highly human-modified localities in the Portland Metropolitan Region. We investigate whether these, and other newly discovered suburban populations, represent remnant populations that persisted in the face of habitat …

The Discovery, Communication, And Implementation Of New Geologic Findings: Examining The Cascadia Earthquake, Saylor Brainard

University Honors Theses

The Cascadia Subduction Zone, located off the Coast of the Pacific Northwest, is at risk of generating a 9.0 magnitude earthquake in the near future. Despite its significance, the discovery of the seismic potential of Cascadia didn't occur until 1987, when geologist Brian Atwater searched for non-traditional forms of earthquake evidence. As decades of continued research fleshed out Atwater's initial discovery, the implications associated with the discovery became apparent, presenting Washington and Oregon with the high probability that a massive earthquake will take place within the next century. Communicating the severity of this geologic discovery to both the public and …

Pvc Biodegradation Potential Of Native Fungal Strains From Mt. Hood National And Tillamook State Forests, Bristol Ozturgut

University Honors Theses

Polyvinyl chloride (PVC) is a toxic, degradation-resistant environmental waste product. Recent research has revealed fungal enzymatic activity capable of biodegrading plastics. As PVC infiltrates local environments, it becomes imperative to determine the adaptability of local fungi to PVC substrates. In this experiment, 100 local native fungal strains sampled from the Tillamook State and Mt. Hood National forests and one commercial strain of common oyster mushroom were investigated for their ability to colonize and digest PVC by direct isolation on 0.1% and 0.2% PVC-enriched limited growth media. Substrates for positive cultures were imaged using Fourier transform infrared spectroscopy to analyze potential …

Characterization Of The Quaternary Active Twin Lakes Fault, Mount Hood, Oregon, Johnathan Peterson

University Honors Theses

The High Cascades chain of volcanoes results from Cascade Arc volcanism and is responsible for the generation of the highest topography in the state of Oregon. Surrounding Mt. Hood at the crest of the Cascade chain in northern Oregon is the Mt. Hood Fault Zone, an extensional fault zone of generally north-south trending normal faults that down-drop this high volcanic topography. The Twin Lakes Fault is located just south of Mt. Hood and is one of the southernmost faults in the Mt. Hood Fault Zone, previously mapped as approximately 12-13 km in length. This study provides the first in-depth characterization …

Germanic Identity And Othering At The Inception Of Modernity: A Critical Translation Of The Geographic Addendum Of The Nuremberg Chronicle (1493), Nina Martin

University Honors Theses

The Nuremberg Chronicle (1493) is a late medieval humanist world chronicle compiled in its original Latin by Hartmann Schedel and translated into vernacular German by Georg Alt in the same year. It features exquisite woodcut illustrations from the studio of Michael Wohlgemut which bolstered the text's contemporaneous popularity among scholarly and lay audiences along with the unauthorized cheaper editions released by Johann Schönesperger within the decade. This project investigates depictions of collective identity as presented in the Geographic Addendum, a section of the endmatter discussing the peoples and lands of Europe which Schedel compiled from the writings of humanist scholar …

Consumer Choice And Indoor Air Quality, Crystal Jadach

Civil and Environmental Engineering Undergraduate Honors Theses

Outdoor air pollution has drastically improved for everyone since the passage of the clean air act. However, indoor air quality is not monitored or enforceable in the United States. Yet, the EPA estimates that people of developed nations spend approximately 90% of their time indoors. Candles, a common ambiance setting choice for many household consumers, have been well characterized as a source of volatile organic compounds (VOCs). VOCs can have a wide variety of negative effects on human health. A benchtop and pilot scale study were used to characterize the difference in the accumulation and displacement of total volatile organic …

Game-Based Learning As A Dynamic System: A Review Of The Literature, Meadow Mcgalliard

University Honors Theses

Game-based learning (GBL) in its development as a field has found itself at an ever-increasing complexity with regard to theories, design elements, and outcomes that define it. It's been long since proven that games produce learning and the ways in which this benefits educators and designers have broad applications, from direct game implementation to integrating GBL knowledge into non-game spaces. The density and complexity of design in GBL prove beneficial for learning opportunities, as the adaptability of design can create an almost infinite series of outcomes in a highly replicable manner. In this broad review, I attempt to display the …

A Study On Fuzzy Time-Series And Its Applications To Stock Price Forecasting, Takeshi Stormer

University Honors Theses

Fuzzy mathematics looks to incorporate the vagueness that exists within the real world, specifically regarding imprecise classes, or non-numerical information expressed as "linguistic" variables. Since most traditional mathematical theories do not have the ability to be applied with the exactness that is otherwise seen in mathematics. As such, there had been many applications of fuzzy mathematics throughout many different fields of mathematics, including that of forecasting. By exploring the fundamentals of fuzzy mathematics, including fuzzy sets, operations of fuzzy sets, the surface level introduction to fuzzy logic, fuzzy relations, operations of fuzzy relations, and fuzzy time-series, this work looks to …

A Veblenian Approach To Chaos Theory, Isaiah Henry

Hatfield Graduate Journal of Public Affairs

This paper provides a comparative analysis of Veblen's belief in disequilibrium, the field of chaos theory, and how these two frameworks connect. We explore the similarities and differences between Veblen's theories and the principles of chaos theory, including their shared emphasis on complexity and unpredictability. By analyzing the connections between Veblen's economic theories and chaos theory, we can gain a deeper understanding of the nature of disequilibrium and the complex forces that shape our world.

Cannabis Concentrate Vaping Chemistry, Kaelas R. Munger, Killian M. Anreise, Robert M. Strongin

Chemistry Faculty Publications and Presentations

Background:

This review article addresses the vaping chemistry of manufactured cannabis concentrates—a topic that remains under-researched despite the widespread availability and growing popularity of these products. Given their current prevalence and the fact that many of the findings discussed herein are from early-stage investigations, further research is essential to fully assess the public health risks associated with concentrate use. The purpose of this article is to help begin to bridge this knowledge gap by outlining the technical challenges of studying cannabis concentrates and to present evidence-based data concerning toxicant exposures as a foundation for future investigations.

Methods:

A search of …

Temporal Modeling And Forecasting Of Blood Glucose Dynamics In Individuals With Diabetes Mellitus, Mj Ruff

University Honors Theses

People living with Diabetes Mellitus face significant health risks, including an increased likelihood of heart disease, stroke, and fluctuations in blood glucose levels. The unpredictable nature of glucose levels can lead to dangerous conditions such as ketoacidosis and hypoglycemia. This study employs advanced time series analysis tools to forecast the glucose levels for an individual diagnosed with Type 1 Diabetes Mellitus.

Factors Associated With Applying To Graduate/Professional Degrees For Students Engaged In Undergraduate Research Experiences At Minority Serving Institutions, Lourdes E. Echegoyen, Kala M. Mehta, Karsten Hueffer, Jacob D. Kagey, Thomas E. Keller, Kathleen M. Morgan, Stephen B. Aley, Chi-Ah Chun, Payam Sheikhattari, Amy Wagler

School of Social Work Faculty Publications and Presentations

Introduction:

This study investigates the impact of undergraduate research experiences on applications to graduate and professional programs, particularly for underrepresented minority students at Minority Serving Institutions (MSIs).

Methods:

The study analyzes data collected at 10 MSIs participating in the NIH BUILD program to understand the relationship between research participation (in formal programs vs. informal research), student demographics, science self-efficacy, GPA, and application to advanced degree programs.

Results:

Results indicate that undergraduate research participation, especially in formal programs for extended periods of time, positively influences applications to graduate/professional programs, with similar outcomes observed across underrepresented minority and non-minority students.Discussion

Findings indicate …

From Lockdown To Learning: Understanding Motivation Shifts In High School Students Due To The Covid-19 Pandemic, Kelly Lindberg

University Honors Theses

The COVID-19 pandemic induced profound disruptions to the educational landscape, significantly impacting high school students' motivation to learn. This thesis explores how these disruptions affected students' intrinsic and extrinsic motivations through the lenses of three motivational theories: Self-Determination Theory, Maslow’s Hierarchy of Needs, and Expectancy-Value Theory. By examining changes in the learning environment, social connections, and mental health before, during, and after the pandemic, this study identifies key factors that shaped changes in students' academic engagement. The shift to online learning during the pandemic, combined with social isolation and increased mental health challenges, diminished students' intrinsic motivation and weakened their …

Forecasting Influenza Rates Using Machine Learning: A Study Of Chatgpt's Predictive Accuracy, Sara Saleh

University Honors Theses

This study evaluates ChatGPT's ability to forecast influenza rates, such as the number of flu cases, hospitalizations, and death during peak season periods using CDC data, and comparing forecasts against actual results to calculate statistical accuracy and consistency. Influenza forecasting is essential for public health planning, but traditional methods may not always provide timely or accurate predictions. In this research study, ChatGPT was utilized to predict the influenza rates for the following week based on the previous week's data obtained from the FluView surveillance system. The predicted rates were compared to the actual influenza rates to assess the model's overall …

Teaching Diffuse, Specular, And Total Internal Reflection Via A Halo Effect, Paul R. Destefano, Ralf Widenhorn

Physics Faculty Publications and Presentations

Interesting and pedagogically useful physics can be found in the halo produced by a laser pointer directed into a shallow body of water. We describe a simple model for this phenomenon using geometric optics and support this model with empirical evidence. We also discuss and verify extensions to this model that explain variations in the visual pattern. These variants include a double halo pattern and a disk of dim light that can be produced with minor modifications of the single halo configuration. Although the level of complexity differs, all of these models rely on the same ray optics, specifically refraction …

Investigation Into Thermodynamic And Kinetic Phenomena In Arylation Reactions With Diaryliodonium Salts, Soocheta Jha

Dissertations and Theses

Benzenoid rings are fundamental structural motifs in organic chemistry, widely recognized for their prevalence in natural products, pharmaceuticals, agrochemicals, and functional materials. Transition metal-catalyzed arylation, using catalysts such as palladium, nickel, or copper, has revolutionized C-C, C-O, and C-N bond formation, offering broad substrate scope and high efficiency. Among the reagents developed for efficient aryl group transfer, diaryliodonium salts have emerged as particularly powerful tools. Diaryliodonium salts facilitate metal-free arylations across a broad spectrum of nucleophiles, offering high reactivity, operational simplicity and environmental compatibility. The versatility of diaryliodonium salts has led to their widespread adoption as efficient arylating reagent in …

What This Work Really Takes: Lessons, Tensions, And Student Perspectives In A Social Justice Math Classroom, Kathryn Elizabeth Roman

Dissertations and Theses

In recent years, there have been growing calls for mathematics instruction that engages students in understanding and critiquing injustice through mathematics. While resources for social justice math (SJM) lessons have become increasingly available, implementing these lessons in real classrooms--with real students, real time constraints, and real pressures--remains a challenge. This dissertation explores how teachers and students navigate this complexity through three connected papers.

The first paper introduces a framework to support teachers and mathematics teacher educators (MTEs) in selecting and modifying pre-designed SJM lessons (PSJMLs). The framework is organized around three guiding principles: (1) center student identity and teacher self-awareness, …

Short Communication: Multiscale Topographic Complexity Analysis With Pytopocomplexity, L. S.-H. Lai, Adam Booth, A. R. Duvall, E. Herzig

Geology Faculty Publications and Presentations

TopoComplexity is a Python package designed for efficient and customizable quantification of topographic complexity using four advanced methods: two-dimensional continuous wavelet transform analysis, fractal dimension estimation, rugosity index, and terrain position index calculations. This package addresses the lack of open-source software for these advanced terrain analysis techniques essential for modern geomorphology and geohazard research, enhancing data comparison and reproducibility. By assessing topographic complexity across multiple spatial scales, pyTopoComplexity allows users to identify characteristic morphological scales of studied landforms. The software repository also includes a Jupyter Notebook that integrates components from the surface-process modeling platform Landlab (Hobley et al., 2017), facilitating …

Access To Healthcare For Rural Transgender Adults In The United States, Devon Smith

University Honors Theses

Urban and rural healthcare differ significantly in the amount of facilities, providers and kinds of specialty care that are offered in each environment. The United States is split into urban and rural counties in any given region, and based on those population sizes, are the allocation of healthcare resources for residents. In rural areas in the U.S., transgender adults lack access to gender-affirming care and encounter a lack of gender-affirming care providers due to workforce shortages, discrimination, and a lack of cultural competency. To determine if these residents lacked access to care compared with their urban counterparts, I performed a …

Creating Possibilities: The Ethelind Pope Brown Collection: An Overview Of Who May Have Illustrated America's Oldest Naturalist Paintings, Maksym Dedenko

University Honors Theses

This thesis investigates the Ethelind Pope Brown Collection at the University of South Carolina, a rare assembly of hand-illustrated naturalist artworks depicting an assortment of flora and fauna from the eighteenth century. Despite its artistic and educational value, the creator of the collection remains unidentified. Through close textual and visual analysis, archival research, and comparative stylistic study, this project explores several potential authorship theories while providing background to the necessity of evolving science that facilitated its creation.