Digital Commons Network^™

The Cleansing Effect Of Technological Investment: An Empirical Analysis Of Episodic Labor Market Polarization (2000–2010), Adam Murphy

University Honors Theses

This paper investigates the episodic nature of labor market polarization in the United States between 2000 and 2010. While the Skill-Biased Technological Change (SBTC) framework may have successfully explained the rise of inequality in the 1980s, it struggled to account for the wage stagnation and hollowing out of the middle class that followed in the 1990s and 2000s. Utilizing Task-Biased Technological Change (TBTC) as a primary lens, this study examines how the codification of routine tasks allowed for the widespread substitution of middle-skill labor by technological capital. By synthesizing IPUMS-CPS occupational data with Bureau of Economic Analysis (BEA) investment statistics, …

Reconfiguring Dependency: China's Belt And Road Initiative And Development In Ethiopia And Nigeria, Alexander Freund

University Honors Theses

This thesis examines China's Belt and Road Initiative (BRI) in Africa through the frameworks of dependency theory, postcolonial theory, and neo-colonialism. As China's global economic influence has expanded throughout the twenty-first century, the BRI has emerged as a major source of infrastructure financing and development across the Global South, particularly in Africa. While critics frequently portray the initiative as a form of "debt-trap diplomacy," supporters argue that Chinese investment offers an alternative to the neoliberal conditionality historically associated with Western-led International Financial Institutions (IFIs) such as the International Monetary Fund and World Bank. This study addresses two central research questions: …

Agile In The Age Of Ai: Considerations And Improvements For Streamlining Developer Workflows, Stephen Feng

University Honors Theses

This paper examines the integration of AI language models into Agile developer workflows during a six-month software development project. Using the development of SagacityWall, a mindfulness-based social media application built by a team of eight undergraduates, it identifies three key areas in Agile processes where AI provided meaningful leverage: translating business requirements into actionable developer work tickets, accelerating framework research and technology stack decisions, and reducing onboarding friction through AI-assisted code scaffolding and Behavior-Driven Development story formatting. The study finds that AI meaningfully boosted productivity across these stages – not by replacing developer judgment, but by reducing overhead at each …

Comparing The Sensitivity And Degree Of Boolean Functions Via The Hypercube, Anne-Caroline Rupp

University Honors Theses

This thesis studies three complexity measures of total Boolean functions f:{0,1}ⁿ → {0,1}: maximum sensitivity s(f), polynomial degree deg(f), and spectral sensitivity λ(f), where λ(f) is defined as the spectral norm of the adjacency matrix of the sensitivity graph. Building on the results of Aaronson et al., we examine the inequality chain √s(f) ≤ λ(f) ≤ deg(f) and investigate whether all three quantities can be simultaneously equal.

The first part of the thesis reverse engineers the equality cases of the two known inequalities to isolate necessary extremal conditions on both the Fourier structure of f and the local geometry …

Capstone Review: Warn Winch Proximity Sensor, Leana Girton

University Honors Theses

This thesis reviews the mechanical engineering capstone project that designed a winch proximity sensor for WARN Industries. WARN is very interested in developing this product for market as a safety and ease-of-use accessory, and working with Portland State University was the first step in this process. A group of four mechanical engineering and four electrical engineering capstone students collaborated to research sensor types, test the selected methods, and design and build a prototype. The final design implements an inductive ring, a mechanical button, and bluetooth signaling. The project succeeded in prototyping a proximity sensor for WARN, who will have access …

Psychological Architecture: Evaluating The "Greenhouse Model" As A Structural Standard For Lgbtq+ Well-Being, Ava Lee

University Honors Theses

Traditional LGBTQ+ mental health frameworks often conceptualize psychological safety as a matter of individual endurance. This paper critiques this focus on adaptive resilience, which systematically shifts responsibility from institutions to individuals. To counter this, the study introduces "Psychological Architecture," a framework viewing social environments as constructed infrastructures that can either support or undermine queer well-being. The model contrasts performative "Glasshouses," which prioritize visibility over safety, with engineered "Greenhouses" that nurture sustainable safety through three sequential pillars: Authentic Representation (walls), Emotional Validation (insulation), and Vocal Activism (ventilation).

Grounded in the findings of a 2024 qualitative pilot study of a queer roller …

An Exploratory Latent Segmentation Approach To Account For Temporally Shifting Parameters In Driver Injury-Severity Models, Tanmoy Bhowmik, Shahrior Pervaz, Fred Mannering, Naveen Eluru

Civil and Environmental Engineering Faculty Publications and Presentations

Temporally shifting parameters in crash severity modeling is a well-documented phenomenon, with growing evidence suggesting that the influence of explanatory variables changes over time due to shifts in driver behavior, vehicle technology, and roadway conditions. Many studies have examined this issue by comparing the temporal stability of adjacent-year data using a variety of modeling frameworks that have often assumed a homogenous effect of explanatory variables across the entire crash population. The current research effort departs from past work in two ways. First, it compares data separated by multiple years (instead of comparing adjacent years), and second, it tests the homogeneous …

Holding Pattern: The Making Of An Ep, On Intuition, And Form Becoming The Content, Oscar Larson Phillips

University Honors Theses

This craft essay traces the making of "Holding Pattern," a three-song EP representing the culmination of five years of development in composition, production, lyric writing, and sound engineering. Each song addresses its own distinct emotional territory: the tension between confidence and self-doubt, resistance to creative conformity, and the experience of emotional dissociation. Together they form a single arc: reaching out, holding your ground, and surviving it. This essay moves through each song, examining how production decisions, lyrical construction, and the recording process each served the content of the work. Working intuitively across composition, sampling, collaboration, and recording, what only became …

Gps Tracking Smart Dash Cam Capstone Review, Simrah Saleem

University Honors Theses

This thesis details our design, implementation, and collaborative development of an intelligent vehicle logging system built on a Raspberry Pi 5. Unlike standard consumer dash cams that act as closed "black boxes," our system uses a dual-camera stereo vision setup integrated with centimeter-level accuracy. While we successfully built a functional Proof of Concept capable of event-triggered recording, dual-monitor visualization, and smart detection and recognition, this paper focuses on our engineering journey and the real-world challenges we faced. Using an Agile framework, we split into three specialized sub-teams to handle hardware, database, and interface design in parallel. This structure created unique …

Research Matters: Problem-Setting: A Research Reflection Process, Merinda Kaye Hensley

Communications in Information Literacy

In this inaugural “Research Matters” column, Merinda Kaye Hensley introduces problem-setting as an intentional research reflection process inspired by instructional design. This three-pronged approach invites librarians to examine their research agendas by surfacing prior knowledge, identifying bottlenecks, and creating an assumptions inventory. By interrogating what we think we know and where we struggle in doing research related to information literacy, problem-setting reframes our research processes as a generative, inquiry-driven practice. Drawing on an example from her own research agenda, investigating undergraduate researchers’ understandings of the publication process, Hensley demonstrates how reflective problem-setting can unstick thinking, sharpen questions and energize scholarly …

Toward Data-Centric Ai: A Comprehensive Survey Of Traditional, Reinforcement, And Generative Approaches For Tabular Data Transformation, Dongjie Wang, Yanyong Huang, Wangyang Ying, Haoyue Bai, Nanxu Gong, Xinyuan Wang, Sixun Dong, Tao Zhe, Kunpeng Liu, Meng Xiao, Multiple Additional Authors

Computer Science Faculty Publications and Presentations

Tabular data is one of the most widely used formats across industries, driving critical applications in areas such as finance, healthcare, and marketing. In the era of data-centric AI, improving data quality and representation has become essential for enhancing model performance, particularly in applications centered around tabular data. This survey examines the key aspects of tabular data-centric AI, emphasizing feature selection and feature generation as essential techniques for data space refinement. We provide a systematic review of feature selection methods, which identify and retain the most relevant data attributes, and feature generation approaches, which create new features to simplify the …

Coupled Ferroelectricity And Phonon Chirality, Xiang-Bin Han, Cong Yang, Rui Sun, Xiaotong Zhang, Thuc Mai, Zhengze Xu, Aryan Jouneghaninaseri, Xiaoning Jiang, Rahul Rao, Yi Xia, Multople Additional Authors

Mechanical and Materials Engineering Faculty Publications and Presentations

Recognizing the coupling between ferroelectricity and chirality in optically active ferroelectrics opens a route for manipulating chirality via ferroelectricity under an external electric field, enabling control over chirality-dependent quantum states. Here, we report the experimental demonstration of the coupling between ferroelectricity and phonon chirality in the molecular ferroelectric triglycine sulfate. By electrically switching the crystal chirality, we achieve reversible and device-compatible control of phonon chirality, as revealed by in situ time-resolved magneto-optical Kerr effect measurements. The Kerr rotation reverses with electric-field switching, while phonon chirality vanishes in the paraelectric phase and is tunable in the racemic ferroelectric state. Furthermore, density …

Isometric Force Characterization Of Braided Pneumatic Actuators, Ben Bolen, Mohammad Elzein, Lawrence Pang, Alexander Hunt

Mechanical and Materials Engineering Faculty Publications and Presentations

Artificial muscles such as braided pneumatic actuators (BPAs) offer many advantages for robotic systems, including high durability and strength-to-weight ratios. However, their use in robotic systems is still extremely limited, in part due to their poor force, length, and pressure characterization. In this work, a test setup is created to compare force produced by Festo fluidic BPAs with leading models. Our analysis of the data has resulted in (1) the development of new equations to calculate force as functions of pressure and contraction for Festo BPAs with uninflated diameters of 10 mm and 20 mm, and (2) a novel equation …

Symmetry And Psychosocial Adaptation To Trauma, Illness And Disability Part I: Views From Physics, Medicine And Psychology, Hanoch Livneh

Leadership, Learning and Counseling Faculty Publications and Presentations

The aim of this two-part paper is to discuss the concept of symmetry and its derivatives, symmetry breaking and asymmetry, and the role they assume in elucidating the structure and processes that underlie psychosocial adaptation to traumatic experiences. To achieve this aim, in Part I, first, a cursory review of symmetry is undertaken as it applies to physics, including conservation laws, the forces of nature, and leading theories of nature. Second, the paper addresses how symmetry is perceived in biology and medicine, including symmetry within biochemical and genetic structures, the human body, and the onset of disease processes. Third, the …

Shoplifting: Analyzing Spatial And Temporal Patterns, Elizabeth Petrenko

Dissertations and Theses

Shoplifting has contributed to significant losses in Oregon, reaching nearly $956 million in 2022. While overall property crime in Portland, Oregon, dropped between 2023 and 2024, reported shoplifting incidents increased by 50.0%. In Oregon, stealing property worth $100 or less is third-degree theft and a Class C misdemeanor. Second-degree theft involving stealing property between $100 and $1,000 is a Class A misdemeanor. Although often classified as petty or minor theft, shoplifting imposes strain on retailers, consumers, and communities, which raises questions about the spatial and temporal distribution of this crime. This study uses Portland Police Bureau (PPB) offense data to …

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 …

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 …

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 …

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, …

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 …

Practice Research In Social Work-Participation, Co-Creation, And Service Users' Positions: Introduction To The Articles From The Sixth International Conference On Practice Research, Bowen Mcbeath, Sui Ting Kong, Lars Uggerhoj

School of Social Work Faculty Publications and Presentations

Purpose

This special issue examines practice research in social work, focusing on participation, co-creation, and service users’ positions in knowledge production and utilization. Practice research is advanced as a collaborative, context-sensitive approach that challenges hierarchical models of evidence and foregrounds co-produced knowledge.

Method

Drawing on the Sixth International Conference on Practice Research at Aalborg University, Denmark, the 11 special issue articles explore service user involvement, positionality, and organizational conditions shaping inquiry.

Results

The introduction synthesizes cross-cutting themes from the articles into an integrative framework linking epistemic justice, co-methodologies, and institutional supports for co-learning and improvements in practices, structures, and policies. …

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.

The Kraken Wakes: Myth, Science, And The Rise Of A Maritime Sensation, From 1750-1900, Leif G. Crockett

Young Historians Conference

Since the 1800s, the legend of the Kraken has pervaded literature, but this creature is much older, figuring in Norwegian myths as early as the 13th century. The modern understanding of the Kraken can be traced back to the 1750s writing of Bishop Erik Pontoppidan, who described the monster with fantastical and analytical detail. An interrogation of Pontoppidan’s text, as well as novels, poetry, and other media sources from the 19th century—many of which reference the Bishop by name—uncovers Pontoppidan’s influence on later stories of the Kraken. Coupled with an analysis of secondary scholarship on the changing dynamics of science …

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 …

Key Issues For Speed Safety Cameras: Results From A Semi-Structured Interview Of Agencies In The United States, Sophia Semensky, Miguel Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Speed safety cameras (SSCs) are a recognized countermeasure for targeting speeding-related crashes, injuries, and fatalities. SSCs have been introduced in various cities and are steadily expanding in use both in the U.S. and internationally. The extensive literature review of domestic and international documents and research papers reveals that the U.S. has been comparatively slow to adopt SSCs, with some other countries implementing these systems more extensively and earlier. Many local agencies are eager to learn SSC best practices and implementation lessons within the U.S. context. In this research, key issues related to SSC implementation are explored through semi-structured interviews with …

Water Velocity And Discharge From Tidal Freshwater Creeks In Forested And Herbaceous Wetlands, Austin S. Hudson, G. Curtis Roegner, Gary E. Johnson, David A. Jay

Civil and Environmental Engineering Faculty Publications and Presentations

Acoustic Doppler Current Profilers were deployed in four tidal creeks within forested swamps and herbaceous marshes in the lower Columbia River. Measurements were collected over 12 to 20-day periods during high and low river stage, and then analyzed using wavelet tidal analysis software (CWT_Multi) to characterize temporal variability of water elevation, velocity, and discharge. While subject to similar fluvial and tidal forcing, nuances in creek geometry led to large differences in their hydraulic response. Most obviously, creeks in the higher elevation forested swamps were hydraulically isolated, which limited subtidal discharge but increased tidal monthly variability of discharge in comparison to …

Vacuum Modification Of The Surface Properties Of T15k6 Hard Alloy By Plasma–Chemical Synthesis Of Tin-Cu Coatings, Aleksandr Semenov, Dmitriy Tsyrenov, Nikolay Ulakhanov, Irina Semenova, Undrakh Mishigdorzhiyn, Wen Ma, Simon C. Tung, George E. Totten

Mechanical and Materials Engineering Faculty Publications and Presentations

The design and main parameters of a plasma–chemical reactor containing two compartments are presented. One compartment houses a vacuum-arc evaporator, while the other houses a planar magnetron. The compartments are separated by a diaphragm with a dosing slot for injecting copper vapor into the TiN synthesis compartment. The conditions for the synthesis of superhard TiN-Cu composite coatings are experimentally determined. Based on established process parameters for TiN synthesis in a nitrogen-containing plasma by Ti evaporation using a vacuum-arc discharge, it is proposed to apply TiN-Cu coatings by injecting Cu vapor into the TiN synthesis area and sputtering Cu using a …

Holding The Line: The Existential Threat To Dei Language And Values, Terrance Fitzsimmons, Larry Martinez, Jennifer Bishop, Darryl Rice, Florence Villesèche

Psychology Faculty Publications and Presentations

Purpose – This article critically analyses and critiques the operationalisation of the Trump administration’s anti- DEI policies on Diversity, Equity and Inclusion (DEI) initiatives in the United States of America and beyond. It specifically examines the attempt to silence DEI scholarship and practice, assessing the broader implications for social justice and global progress towards equity. The article also positions these attacks as an existential threat to DEI scholarship, scholars and practitioners, with the potential to reverse progress made since the adoption of the Universal Declaration of Human Rights in 1948. The article serves as a call to action, urging the …

Physiobridge: Physiology-Constrained Self-Supervised Foundation Model For Cross-Device Ecg–Ppg Learning With Conformal Risk Control, Abbas Alzubaidi, Ali Al-Shuwaili, Ali Al-Bayaty

Electrical and Computer Engineering Faculty Publications and Presentations

Wearable and bedside sensors continuously generate electrocardiograms (ECG), photoplethysmograms (PPG), and related physiological waveforms that could enable earlier detection of deterioration and more personalized care. However, current deep learning pipelines in biomedical signal processing often remain taskand device-specific, degrade under domain shift (new hospitals, sensors, skin tones, motion), and provide limited uncertainty information for safety-critical decisions. We propose PhysioBridge, a foundation-model approach that learns a shared representation space for ECG and PPG via self-supervised pretraining and explicit physiology constraints, then supports downstream adaptation with distribution-free risk control. PhysioBridge introduces (i) multi-rate patch tokenization that preserves clinically meaningful morphology across heterogeneous …

Improving The Circuit Realization Of Grover’S Quantum Search Algorithm By Replacing Hadamard With √ × Gates, Ali Al-Bayaty, Ali Al-Shuwaili, Abbas Alzubaidi, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

Jozsa, Bernstein-Vazirani, and Grover, utilize Hadamard gates to create uniform superposition states for the input qubits of an oracle. However, Hadamard gates are non-native (non-supported) gates in all real quantum computers. For this reason, Hadamard gates are considered cost-expensive gates when realizing (transpiling) such algorithms into a real quantum computer. This paper introduces a new methodology for cost-effective transpilation of Grover’s algorithm into real quantum computers, by replacing all Hadamard gates with √ X gates. In quantum computing, the Hadamard and √ X gates create uniform superposition states of a qubit on the Xaxis and Y-axis of the Bloch sphere, …