Digital Commons Network^™

The Impact Of Optimization Approximation Algorithms On The Performance Of The Bht-Qaoa, Ali Al-Bayaty, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

This article investigates the performance impact of five classical optimization approximation algorithms on our previously introduced quantum search algorithm, termed the Boolean–Hamiltonians Transform for Quantum Approximate Optimization Algorithm (BHT-QAOA), to effectively search for all best-approximated solutions for Boolean-based problems. These optimization approximation algorithms are BFGS, L-BFGS-B, SLSQP, COBYLA, and COBYQA. Their performance impact is evaluated and compared using two proposed performance metrics—(i) the final number of function evaluations (the lower numbers denote the best optimization approximation algorithms) and (ii) the final quality of qubit measurements (the higher values indicate all best-approximated solutions were found for a problem). Arbitrary classical Boolean …

An Open-Source Linear Actuated-Quartz Tube Furnace With Programmable Ceramic Heater Movement For Laboratory-Scale Studies Of Combustion And Emission, Casey Coffland, Ryan Bixler, Elliott T. Gall

Mechanical and Materials Engineering Faculty Publications and Presentations

The Linear Actuated Quartz Tube Furnace (LA-QTF) is an instrument engineered to heat and combust materials under controlled conditions, capable of achieving flaming and smoldering states. A ceramic ring furnace is linearly actuated parallel to the length of a quartz tube. The mode of combustion depends on temperature, fuel composition, and oxygen availability; the LA-QTF regulates combustion by controlling the temperature and position of the ring furnace, and airflow within the tube. The LA-QTF can maintain temperatures between 23 °C and 530 °C for extended time periods, with stable temperatures over long-duration (∼120 min) experiments. Flow rate is dependent on …

An Integrated Framework For Memory-Centric Analysis: From Trace Collection To Co-Design, Dhruv Gajaria, Prajwal Challa, Yasodha Suriyakumar, Joseph Manzano, Nathan Tallent, Andrés Márquez

Computer Science Faculty Publications and Presentations

IntroductionThe memory wall phenomenon—where advances in processor performance significantly outpace those in memory subsystems-poses a fundamental challenge for contemporary computing systems. In memory-bound applications, memory subsystem behavior dominates performance, yet existing analysis approaches present significant limitations: detailed microarchitectural simulators require days to weeks to simulate modest workloads; hardware performance counters provide only aggregate statistics that obscure temporal and spatial access patterns; and scaled simulation approaches face challenges in capturing contention effects, bandwidth saturation, and interference patterns that emerge at larger scales. These limitations reflect a processor-centric design philosophy—in both performance analysis tools and system co-design methodologies—that is increasingly misaligned with …

Design And Implementation Of Error Estimators For Finite Element Eigenvalue Problems, Gabriel Esteban Pinochet Soto

Dissertations and Theses

We present three publications, all encompassed under the umbrella of a posteriori error estimation theory for eigenvalue problems for finite element discretizations. The central objective of the research is the development of a general framework for the study of reliable estimation of eigenvalues and eigenspaces. We introduce applications to problems of theoretical interest as well as problems arising in real-life scenarios, such as optical fibers. The first paper focuses on the implementation of a dual-weighted residual error estimator for a nonselfadjoint eigenvalue problems arising from the study of leaky modes in optical fibers---Maxwell's equations, Perfectly Matched Layers, and a conforming …

Improving Explainability And Interpretability Of Neural Networks Via Hyperparameter-Extended Influence Functions, William Breslin

Dissertations and Theses

Understanding how model predictions and training outcomes vary with changes in data, features, and modeling choices is central to explainable artificial intelligence. This dissertation introduces a unified framework for explainability by generalizing classical influence functions to encompass user-defined hyperparameters embedded in the training loss, model architecture, or data representation. By extending influence functions in this way, the framework broadens their applicability and integrates multiple explainability techniques into a single, coherent approach. It provides a common mathematical foundation linking data impact, feature importance, and model design analysis, and supports a broad class of additional explainability analyses beyond these settings. The demonstrated …

Vegetated Canopy Heterogeneity Footprints In The Roughness Sublayer, Giulia Salmaso, Raul Bayoan Cal, Marc Calaf

Mechanical and Materials Engineering Faculty Publications and Presentations

Turbulent flows over horizontally homogeneous rough surfaces are categorized as rough‐wall boundary layer flows, while flows over homogeneous vegetated canopies are better described through a mixing‐layer analogy. At present, numerous studies have investigated canopy density as a transition mechanism between rough‐wall and mixing‐layer‐type flows. Yet, most considered canopies have been spatially homogeneous, with few exceptions investigating agricultural arrangements. However, most vegetated canopies are not homogeneously distributed, but instead contain gaps and spatial heterogeneities of different scales. In these cases, it remains unclear which are the dominant flow traits, and how spatial heterogeneity affects them. To help overcome these knowledge gaps, …

Local And Indigenous Knowledge, Innovation, And Sustainable Development: Creating Sustainable Futures Amidst Crisis Conditions At The Community Level, Carlos Andrés Arias

Dissertations and Theses

In 1987, the Brundtland Commission's Our Common Future (1987) made clear the need to reject longstanding development processes and focus on sustainable development. The Commission stressed that actual sustainable development integrates three elements: social development, economic development, and environmental protection. Though developed nations have achieved economic growth through conventional and extractive development practices, these practices have intensified natural disasters driven by climate change, increased food insecurity, and deepened poverty. This has acutely impacted Indigenous and local communities, many of whom face crisis conditions, such as war, terrorism, civil disorder, and their aftermath. Even so, many of these communities successfully implement …

Haapxtàm Ka'Ál Yimisapʰíkʰ We Dream For Our Children Indigenous Pedagogies In Early Childhood Education: Survivance, Truth Telling, And Healing On Native Land, Sara Anne Koyano

Dissertations and Theses

Since Time Immemorial, Indigenous Peoples have lived, learned, and thrived on this continent, exercising their inherent sovereignty as Original Peoples and passing down Indigenous ways of knowing, being, and learning across generations. US settler colonial violence and assimilation policies have had historical and contemporary detrimental impacts on Native children, families, and communities by attempting to disrupt the intergenerational transmission of Indigenous knowledges. Consequently, many young Native children in Oregon do not have access to educational opportunities that value, honor, and affirm their Indigenous identities and cultures, nor do they see themselves reflected in their classrooms and curricula. Furthermore, in 2019, …

Oregon State Rank Assessment For Wiens' Dwarf Mistletoe (Arceuthobium Abietinum Ssp. Wiensii), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Wiens' dwarf mistletoe (Arceuthobium abietinum ssp. wiensii) using NatureServe methodology, 2026.

Heat Pump Water Heater Cta-2045 Implementation Guidance For Maximizing Demand Response Impact, Dana Kahiwahiwa Paresa

Dissertations and Theses

Residential flexible loads, such as heat pump water heaters, have great potential for grid reliability services; however, their effectiveness depends on reliable performance in response to coordinated grid service requests. While the ANSI/CTA-2045-B protocol standardizes communication, it does not mandate specific functional behaviors, creating a mismatch in which the device may comply with the communication protocol but fail to meet performance expectations. This manuscript demonstrates the need for a ANSI/CTA-2045-B implementation guide by quantifying these discrepancies through gray-box conformance testing of market-available units followed by large-scale simulations.

Field testing results revealed a significant conformance gap. Tested units exhibited an average …

Oregon State Rank Assessment For Bedstraw Broomrape (Aphyllon Epigalium Ssp. Epigalium), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Bedstraw broomrape (Aphyllon epigalium ssp. epigalium) using NatureServe methodology, 2026.

Crossing Boundaries: Brachinites And Their Diverse Asteroidal Origins, B. G. Rider-Stokes, F. A. Davies, T. H. Burbine, E. Maclennan, R. C. Greenwood, S. L. Jackson, M. Anand, Daniel Sheikh, M. M. Grady

Geology Faculty Publications and Presentations

Brachinite meteorites are typically linked to the olivine-rich A-type asteroids. In this study, however, they appear to exhibit unexpected spectral diversity. Spectroscopic analysis of seven meteorites from the brachinite clan reveals two distinct populations in band parameters, overlapping with both the A-type and S-complex asteroids. This dual association shows that a single meteorite group can originate from multiple asteroid taxonomies. Notably, one S-complex-like specimen, Northwest Africa (NWA) 14,635, displays band parameters similar to those of asteroid (65803) Didymos, the target of the European Space Agency's (ESA) ongoing Hera mission. These results underscore the value of spectroscopic characterization of poorly understood …

Golden Age Or Gilded Cage? The Rise And Dissolution Of The Olympic Art Competitions, 1912–1948, Stella E. Gatziolis

Young Historians Conference

In 1912, Baron Pierre de Coubertin’s modern day Olympics celebrated not only its five year anniversary, but the first inclusion of the Olympic Art Competitions. Resembling a neo-Renaissance, Coubertin envisioned a “balance of the muscle and the mind” through the unity of the physical and intellectual. But by 1948, the art competitions had collapsed, leaving the social experiment to be forgotten by future generations. Drawing upon personal testimony from Coubertin and his loyal successors, and records from the International Olympic Committee, this paper explores how Coubertin’s extreme dedication to a pure and sanctified Neoclassical ideal led to the art competition’s …

Nation-Building On Pillars Of Fascism: How Italian Fascist Ideals Have Remained Alive In Eritrean Identity Through The Asmaran Urban Landscape, Caspian Green

Young Historians Conference

Roughly a third of Eritrea’s time as an Italian colony was spent under fascist rule, during which the Italian colonists dramatically changed the Asmaran urban environment, as well as its relationship with the rest of the Eritrean colony, to reflect fascist principles. After the fall of the Italian colonial empire, Eritrean political leaders sought to use the physical landscape to justify their claims to sovereignty, reapplying those pre-existing fascist principles to Eritrean nationalism. By examining Italian-Asmaran buildings, roads, and legal structures in their contexts, common threads between past fascist beliefs and the modern Eritrean military state emerge, offering a better …

Little Africa In Global China: Transnational Nigerians In Guangzhou And The Making Of Xiaobei, Tess L. Nestel

Young Historians Conference

This paper will examine the history and development of transnationalism fostered by Nigerians in Guangzhou, China, after the late 1990s. Spurred in part by the Asian Financial Crisis, Nigerian men flocked to Guangzhou’s thriving import-export economy. They established the ethnic enclave of Xiaobei, where many lived and engaged in the informal wholesale economy. Nigerians existed between the cultural boundaries of Xiaobei and Lagos, where they constantly returned. Both the export economy in Guangzhou and the resale economy in Lagos’ street markets were deeply influenced by one another through entrepreneurial migrants. This paper will provide a general overview of the many …

From Mogadishu To Minneapolis: Transnational Political And Social Ties In The Somali Diaspora, Kate E. Mcfarland

Young Historians Conference

Beginning in the 1980s, Somalis have fled Somalia in order to escape persecution and political violence, find new economic opportunities, and achieve a better life. One major destination of these migrants is Minneapolis, Minnesota, which is now home to over 80,000 Somalis, making up 18% of Minneapolis’ population. Due to this sizable Somali enclave, Minneapolis and Somalia have created and maintained a transnational relationship. This paper examines that relationship, focusing on the causes of the Somali diaspora, evidence of transnational connections (such as remittances, cultural exchange, and political effects), and the challenges that threaten this tie. Understanding this relationship is …

The Prominent Voice Of Cold War Era Radio: The 1968 Soviet Union Invasion Of Czechoslovakia, Zuzana E. Langer

Young Historians Conference

This paper explores the influence of radio and free press during the Prague Spring and subsequent Soviet Union invasion of Czechoslovakia during the Cold War. After the Prague Spring, a brief period of growing freedom stemming from Alexander Dubček’s transition out of strict socialist censorship, the Soviet Union orchestrated a military invasion of the socialist satellite state. During this invasion, radio transmitters in Prague informed listeners that the invasion was against the Czechoslovak’s government’s will and instructed Czech and Slovak citizens to remain calm and protest nonviolently. By analyzing the emergence of the free press from the Prague Spring and …

The Great Plague Of Marseille, Lucy Herzig

Young Historians Conference

This paper examines the causes and consequences of the Great Plague of Marseille (1720-1722), which was one of Western Europe's last major outbreaks of the bubonic plague. Although European port cities had developed quarantine systems to prevent epidemics, Marseille’s outbreak revealed how these protections failed in practice. This paper argues that the plague became so devastating not because of a lack of institutional systems, but due to fragmented local authority, delayed government intervention, and the prioritization of economic interests over public health. Focusing on the arrival of the merchant ship Grand-Saint-Antoine, this paper analyzes how merchant elites influenced quarantine decisions, …

Artificial Light: A Conduit Of Human Productivity Through The Ages, Elias M. Henkle

Young Historians Conference

This paper takes a sharp look at three innovations in artificial light, examining their impact on human productivity through history, and on our global society today. It posits that light technology has played a pivotal role in human productivity. From conversation around campfires, to handheld lighting technologies (such as candles, oil lamps, and other such crude— yet compact— lighting devices), to fiber-optic cables that carry information across oceans through the power of light— humanity’s productivity has been massively impacted by innovations in light technology.

Subversive Shooting: How Annie Oakley Rose To Nationwide Notoriety, Sycan I. Jones

Young Historians Conference

Annie Oakley was a famous female sharpshooter in Buffalo Bill’s Wild West Show for over 16 years. Despite being a woman in a largely male-dominated profession, she became a nationwide sensation in the late 19th and early 20th centuries, outpacing other female shooters who followed her example. This paper seeks to analyze how specific attributes of Oakley’s feminine persona supported her unprecedented success amidst changing cultural values. Photos and videos of Oakley and secondary scholarship focused on Oakley’s role in western expansion reveal how Oakley leveraged her femininity to create a name for herself and took advantage of burgeoning new …

A Battle Of Will And Wisdom: Polar Opposites In The Polar Extremes Of The Viking World, Lily C. Manne

Young Historians Conference

This paper explores the connection between the polar climate of Viking-age Scandinavia and the success of the Vikings through examining the dual nature of their culture brought about by their environment. The Scandinavian peninsula is known for its harsh, variable climate full of cold winters and unpredictable harvests that turned into long summers and melting fjords. Outside of shaping survival strategies and material culture, this polar environment seeped into the fundamental cultural values the Vikings exhibited, creating the foundation for a society that understood the value of destruction and violence as well as creation and craftsmanship. Using Norse mythology as …

Demonizing Sexuality: Dangerous Women In Folklore, Lily E. Nelson

Young Historians Conference

Cross-culturally, women in folklore have been portrayed as dangerous due to their sexuality and influence over men. Clear patterns throughout history emerge through analysis of the following occurrences, which show a link between how sexualized a female figure is and the threat she is considered to pose. The she-demon Lilith in Jewish and Mesopotamian mythology as well as folklore relating to the Scriptures, mermaids in Europe, and fox spirits in East Asia all demonstrate this phenomenon, since they are all overly sexualized and represent broader social norms towards women. These beings all exhibit similarities in being able to exert control …

36th Annual Young Historians Conference Program, Portland State University History Department, Portland State University Challenge Program

Young Historians Conference

This is the 2026 Young Historians Conference schedule and abstracts.

Cylindrical Versus Spherical Self-Similar Capillary Cavity Collapse, Karl Cardin, Christophe Josserand, Raul Bayoan Cal

Mechanical and Materials Engineering Faculty Publications and Presentations

Drop tower experiments have been performed to study the capillary collapse of large high-aspect-ratio cavities. Cavities are formed by momentarily impinging the free surface of a liquid bath with a jet of air in the microgravity environment of a drop tower. The collapse may give rise to a jet and three distinct jetting regimes are identified. Simulations are performed to further investigate the phenomena. The abrupt emergence of a thin high velocity jet is observed experimentally and numerically at a specific initial cavity aspect ratio. Different power laws are identified in different regions of the cavity during the collapse providing …

Administrative Burdens In Post-Filing Eviction Prevention Programs: Focusing On Oregon's Safe Harbor Policy, Minji Cho

Homelessness Research & Action Collaborative Publications and Presentations

This study examines the administrative burdens faced by tenants in post-filing eviction prevention programs, focusing on Oregon’s Safe Harbor Policy during the COVID-19 pandemic. Safe Harbor, paired with the Emergency Rental Assistance (ERA) Program, aimed to prevent tenants from being evicted while waiting for rental assistance applications to be processed and for the monies to be disbursed, by inserting a long pause in the otherwise short eviction process. Despite its novelty, tenants in post-filing eviction stages faced challenges with tight timelines and navigating both eviction proceedings and ERA applications. This study demonstrates the administrative burden tenants experienced when securing Safe …

Rosenzweig's Elements And Universal History, Martin Zwick

Complex Systems Faculty Publications and Presentations

This paper uses Rosenzweig’s conception of the three elements of God, World, and Human from The Star of Redemption in a model of universal history. The model also has some relation to Rosenzweig’s geopolitical essay, Globus, which is very different from the meta-historical Star. Based on a systems-theoretic schema of events and processes, the model views human history in terms of three linked processes: a primary process labeled “World” – the origin and development of human society embedded in nature, a secondary process labeled “God” – the origin and development of the Axial religions and philosophies, and a …

Artificial Intelligence In Dental And Orthopedic Skeletal Imaging: A Scoping Review Of Methodological Convergence And Translational Gaps, Man Hung, Isabella Strickler, Annabella Jensen, Bayler Gunnell, Alicia Parry, Samuel Dyal, Martin S. Lipsky

Institute on Aging Publications

This scoping review aimed to answer the question: to what extent do artificial intelligence applications in dental and orthopedic skeletal imaging demonstrate true cross-disciplinary methodological convergence versus parallel development with shared translational barriers? This scoping review synthesizes AI applications across both fields to characterize methodological overlap, developmental asymmetries, and translational gaps, rather than assuming convergence. Following the PRISMA-ScR reporting standards, we searched PubMed, Scopus, Web of Science, IEEE Xplore, and EMBASE for peer-reviewed, English-language human studies published between January 2015 and May 2025. Eligible studies applied AI, machine learning, or deep learning to diagnostic, segmentation, or preoperative planning tasks in …

An Infinite Set Of One-Range Addition Theorems Without An Infinite Second Series, For Slater Orbitals And Their Derivatives, Applicable To Multiple Coordinate Systems, Jack C. Straton

Physics Faculty Publications and Presentations

Addition theorems have been indispensable tools for the reduction of quantum transition amplitudes. They are normally utilized at the start of the process to move the angular dependence within plane waves, Coulomb potentials, and the like, into a sum over spherical harmonics that allows the angular integration to be carried out. These have historically been “two-range” addition theorems, characterized by the two-fold notation r>=Max[r1,r2] and r< =Min[r1,r2] and comprising a single infinite series. More recently, “one-range” addition theorems have been created that have no such piecewise notation, but at the cost of the introduction of another infinite series. We use a very different approach to derive an infinite set of addition theorems for Slater orbitals, hydrogenic and Hylleraas wave functions, and so on, that retain the one-range variable dependence but have, at worst, a finite second series rather than an infinite one. In addition, unlike previous addition theorems, they are applicable to more than one coordinate system. One of these addition theorems may also be used for Yukawa-like functions that may appear late in the reduction of amplitude integrals, and we show its utility for an integral that has stubbornly defied reduction to analytic form for nearly sixty years. Finally, we craft indefinite integrals of 15 half-integer Macdonald functions multiplied by (inverse) powers and negative exponentials containing squares of the integration variable.

Evaluating Acridones As Novel Therapeutics For Human Babesiosis, Pratap Vydyam, Elizabeth Zhang, Papireddy Kancharla, Rozalia A. Dodean, Jane X. Kelly

Chemistry Faculty Publications and Presentations

Human babesiosis is an emerging tick-borne disease caused by Babesia parasites, most notably Babesia microti and Babesia duncani in North America and Babesia divergens in Europe. Infections can be severe or persistent or relapse despite treatment, and current therapeutic options remain limited, underscoring the urgent need for new and effective treatment options. Acridone derivatives originally developed as potent antimalarial agents against multiple life cycle stages of the malaria parasites were evaluated for their antibabesial activity using continuous in vitro culture systems of B. duncani and B. divergens. Lead candidates were assessed for selectivity against human cell lines to establish preliminary …

Association Between The Combined Herbal Medicines And Risk Of Dental Diseases In Patients With Rheumatoid Arthritis: Insight From A Nationwide Database, Chiu-Hui Ling, Wei-Jen Chen, Ying-To Hsu, Hanoch Livneh, Ming-Chi Lu, Tzung-Yi Tsai

Leadership, Learning and Counseling Faculty Publications and Presentations

Background and Objectives:

Patients with rheumatoid arthritis (RA) are found to have a higher risk of dental diseases. Although herbal medicines (HMs) have long been used to treat various conditions, few studies focus on its impact on dental diseases. In this longitudinal cohort study, we assessed the correlation between HM use and risk of dental diseases in RA groups.

Materials and Methods:

A total of 2359 persons with RA aged 20–80 who were free of dental diseases between 2001 and 2010 were retrospectively enrolled from nationwide register-based data. They were then classified into HMs and non-HMs groups based on whether …