Digital Commons Network^™

Doping Hybrid Photopolymerisable Glass With Bodipy Photosensitiser: An Efficient Approach To Improve Uv-Resistance, Luca Sorridente, Tatsiana Mikulchyk, Metodej Dvoracek, Mikhail A. Filatov, Izabela Naydenova, Kevin P. Murphy

Conference Papers

The development of photosensitive materials with improved performance and extended functionality is crucial for advancing holographic technologies. This study presents the modification and characterization of a recently reported photopolymerisable glass composition, focusing on achieving an optimal balance between maximizing photosensitivity of the material during recording and minimizing the impact of UV light on the performance of the recorded holographic structure. Building on these findings, the ultimate goal is to develop UV-resistant holographic optical elements for wavefront sensing in space applications. The research approach is based on introducing a photosensitiser with weaker UV absorption than the typically used in this material …

Unprecedented Visible Light-Initiated Topochemical [2 + 2] Cycloaddition In A Functionalized Bimane Dye, Metodej Dvoracek, Brendan Twamley, Mathias O. Senge, Mikhail A. Filatov

Research Outputs: 2025-Present

Bimanes, a class of molecules based on the 1H,7H-pyrazolo[1,2-a]pyrazole-1,7-dione scaffold, were first introduced by E. M. Kosower in 1978. In this study, we report the topochemical cycloaddition of diethyl 2,6-dichloro-1,7-dioxo-1H,7H-pyrazolo[1,2-a]pyrazole-3,5-dicarboxylate (Cl₂B), initiated by visible light. Crystal structure analysis confirmed that the reactive double bonds are parallel and coplanar, in line with the Schmidt criteria for topochemical cycloaddition. Additionally, two other bimane derivatives with different substitution patterns were synthesized and investigated. Our findings suggest that functionalizing bimanes to redshift their absorption maxima into the visible-light spectrum provides a promising strategy for synthesizing substituted cyclobutanes without the need for ultraviolet …

A New G Family: Properties, Characterizations, Different Estimation Methods And Port-Var Analysis For U.K. Insurance Claims And U.S. House Prices Data Sets, Ahmad M. Aboalkhair, Gholamhossein Hamedani, Nazar Ali Ahmed, Mohamed Ibrahim, Mohammad A. Zayed, Haitham M. Yousof

Mathematical and Statistical Science Faculty Research and Publications

This paper introduces a new class of probability distributions, termed the generated log exponentiated polynomial (GLEP) family, designed to enhance flexibility in modeling complex real financial data. The proposed family is constructed through a novel cumulative distribution function that combines logarithmic and exponentiated polynomial structures, allowing for rich distributional shapes and tail behaviors. We present comprehensive mathematical properties, including useful series expansions for the density, cumulative, and quantile functions, which facilitate the derivation of moments, generating functions, and order statistics. Characterization results based on the reverse hazard function and conditional expectations are established. The model parameters are estimated using various …

A Bayesian Complex-Valued Latent Variable Model Applied To Functional Magnetic Resonance Imaging, Chase J. Sakitis, D. Andrew Brown, Daniel B. Rowe

Mathematical and Statistical Science Faculty Research and Publications

In linear regression, the coefficients are simple to estimate using the least squares method with a known design matrix for the observed measurements. However, real-world applications may encounter complications such as an unknown design matrix and complex-valued parameters. The design matrix can be estimated from prior information but can potentially cause an inverse problem when multiplying by the transpose as it is generally ill-conditioned. This can be combat by adding regularizers to the model but does not always mitigate the issues. Here, we propose our Bayesian approach to a complex-valued latent variable linear model with an application to functional magnetic …

Bayesian Merged Utilization Of Grappa And Sense (Bmugs) For In-Plane Accelerated Reconstruction Increases Fmri Detection Power, Chase J. Sakitis, Daniel B. Rowe

Mathematical and Statistical Science Faculty Research and Publications

In fMRI, capturing brain activity during a task is dependent on how quickly the k-space arrays for each volume image are obtained. Acquiring the full k-space arrays can take a considerable amount of time. Under-sampling k-space reduces the acquisition time, but results in aliased, or “folded,” images after applying the inverse Fourier transform (IFT). GeneRalized Autocalibrating Partial Parallel Acquisition (GRAPPA) and SENSitivity Encoding (SENSE) are parallel imaging techniques that yield reconstructed images from subsampled arrays of k-space. With GRAPPA operating in the spatial frequency domain and SENSE in image space, these techniques have been separate but can …

Accuracy And Repeatability Of Autorefraction In Young Adults: A Comparison Of Cycloplegic And Non-Cycloplegic Methods, Megan Doyle, Veronica O'Dwyer O'Dwyer, Michael Moore, Síofra Harrington

Articles

Clinical Relevance: Cycloplegic refraction remains crucial in young adults, where accommodative activity can obscure accurate refractive status. Autorefractor repeatabil­ity is essential for precise optical correction and refractive error categorisation in clinical and research settings.

Background: Cycloplegic autorefraction is recommended for individuals up to 20 years to prevent hyperopia underestimation and myopia overestimation. This study evaluated differences between non-cycloplegic and cycloplegic spherical equivalent refraction following cyclopentolate hydrochloride (cycloplegic agent) administration in young adults. This study also explored whether this difference varied by refractive status (hyperopia (≥1.00D), emmetropia ( >−0.50, < 1.00D), myopia (≤-0.50D)) or pre- instillation of proxymetacaine hydrochloride and whether cycloplegia improved autorefractor repeatability.

Methods: Participants were 182 young adults (17–30 years) (mean (standard deviation): 21.66 …

Therapy In The Age Of Ai: How Young Adults Seek Help, Support, And Solutions, Faith Maeba, Isabella Quilon, Abigail Adade

UROP Posters

Therapy has long been a foundational approach for addressing mental health, but advances in digital technology have led many young adults, especially Generation Z, to increasingly turn to AI tools for support. Rising costs, limited access to providers, and long wait times have further boosted the appeal of AI-based mental-health solutions. Despite this growing interest, the use of AI for emotional and psychological support raises important questions about trust, empathy, safety, and the ethical responsibilities of mental-health providers and developers. We conducted a brief scoping review of research on AI-based mental-health tools and student help-seeking behaviors. Searches were performed on …

The Science Of Gaelic Football Match‑Play And Recommendations For Future Research Directions: A Narrative Review, Kate Timmons, Kieran Collins, Shane Mangan

Articles

In recent years, research in Gaelic football has increased. However, the relationship between training demands and match-play demands is not fully understood and requires further investigation. Due to the stochastic nature of the sport, distances covered in match-play have a positional profile and a reduction in match-play running performance has been observed. The physiological demands of match-play at each level remain underexplored. Likewise, performance analysis is a growing area in Gaelic football, with performance indicators, such as possession, productivity, shot efficiency, and kickouts, providing valuable insights to players and coaches during and post-game. This review synthesises current literature on physical …

Systematic Co-Culture Of Ipsc-Cm And Ipsc-An Promote Co-Maturation In Vitro, William Gregory Terrell Jr.

Graduate Dissertations and Theses

The cardiac microenvironment is a complex system of multicellular interactions that enables proper heart function. In native heart muscle, sympathetic neurons (SN) and parasympathetic neurons (PSN) modulate the beat rate of cardiomyocytes (CM) to maintain homeostasis. Pluripotent stem cells can differentiate into CM, but differentiated CMs are fetal-like, with a high beat rate, and lack organized sarcomeric structure. Recent reports of co-cultured pluripotent CM/SN pairs have reported electrophysiological changes in the SN (increased upstroke velocity). However, interpretation of these results are obscured by the differences in co-culture parameters between studies (stage of development, co-culture duration, etc.). The goal of this …

Ecobuoys For Scalable Oceanography, Anuscheh Nawaz, Michael Steele, Ruth Branch, David Burnett, Kuotian Liao, Mallory Parker, Eleftheria Roumeli

Electrical and Computer Engineering Faculty Publications and Presentations

An approach to scalable surface-drifting buoys is needed to enable the high spatial and temporal resolution of oceanographic data that the science and meteorological communities are asking for. With the number of active buoys predicted to increase by a factor of 100 or more, the impact on the environment becomes even more important. Here, we present a pathway to a scalable and sustainable generation of buoys. We identify the main criteria to be used when developing such buoys to be low cost, with reliable data and neutral or even positive environmental impact. For each buoy subsystem—hull, electronics, energy generation and …

Work In Progress: Using Internships As Means For Indirect Assessment Of Abet Criteria 3 “1-7” Student Outcomes, Robert Bass

Electrical and Computer Engineering Faculty Publications and Presentations

The Electrical & Computer Engineering (ECE) Department at Portland State University (PSU) has developed a Power Engineering Internship (PEI) program that provides engineering career development pathways within the electric utility industry. The PEI is supported by several U.S. Department of Energy grants that aim to develop quality career opportunities and develop a future electric utility workforce that represents the nation’s diverse populations. The PSU ECE Department intends to use surveys of internship participants as assessment tools for its ABET accreditation process, in particular, the ABET Criteria 3 Student Outcomes (SOs). SOs relate to the knowledge, skills, and behaviors that students …

An Offline Approach For Frequency Event Detection In Power Systems: Tkeo And Statistical Analysis, Hussain A. Alghamdi, Midrar Adham, Umar Farooq, Robert Bass

Electrical and Computer Engineering Faculty Publications and Presentations

The increasing integration of renewable energy sources in power grids and the transition from conventional thermal-based generation to inverter-based resources for power generation have reduced power system inertia and increased the rate of change of frequency, which constitutes a challenge for frequency stability in modern power systems. These changes necessitate robust frequency event detection algorithms that can rapidly and accurately identify events, providing essential support to maintain stability. This paper proposes a frequency event detection algorithm with six tunable parameters for offline post-processing, leveraging the Teager-Kaiser Energy Operator method and statistical analysis. The algorithm is tested on a dataset comprised …

End-Less, Marzo Kaisin

Grado en Gestión y Comunicación de la Moda

END-LESS es una marca de moda de segunda mano que busca redefinir el valor percibido de las prendas a través de la narrativa, la autenticidad y la sostenibilidad.

Al crear un nuevo sistema de compra y venta, END-LESS ofrece una nueva experiencia para el usuario, creando un proceso de imaginación detrás de la indumentaria y de su historia. La esencia de la marca se basa en un modelo de negocio que expone narrativas, características y elementos que rodean a cada prenda. Mediante componentes sensoriales, tanto visuales como auditivos, el usuario logra sumergirse en un proceso de compra único, en el …

Second Chances, Andrea Rodríguez Muñoz

Grado en Gestión y Comunicación de la Moda

Este proyecto tiene como objetivo desarrollar un concepto innovador que, en la actualidad, no se encuentra completamente consolidado. No se trata únicamente de crear una empresa, sino de proponer una solución integral. Desde hace décadas, la sociedad enfrenta un problema significativo relacionado con el consumismo. En este contexto, esta empresa nace con la intención de contribuir a mejorar esta situación, con la aspiración de dejar un legado más positivo para las generaciones futuras.

Second Chances surge con el propósito de gestionar los excedentes y stocks inmovilizados de la industria de la moda, planteando una transformación profunda del sector retail tal …

Examining The Presence And Effects Of Coherence And Fragmentation In The Gulf Of Maine Fishery Management Network, Derek A. Katznelson, Antonia Sohns, Dongkyu Kim, Evelyn Roozee, William Donner, Andrew M. Song, Jasper R. De Vries, Owen Temby, Gordon M. Hickey

School of Earth, Environmental, & Marine Sciences Faculty Publications

Natural resource management networks cohere due to mutual dependencies and fragment, in part, due to the perceived risks of interaction. However, research on these networks has tended to accept coherence a priori rather than problematizing dependence, and few studies exist on interorganizational risk perception. This article presents the results of a study operationalizing these concepts and measuring the distribution of three types of dependence (capital, legitimacy, and regulatory) and two types of perceived risk (performance and sanction) among nearly fifty stakeholder groups and organizations participating in the management of fisheries in the binational Gulf of Maine. The analysis reveals an …

Spanking And Children's Approaches To Learning: Estimates From A Longitudinal Matched-Sample Design, Jeehye Kang, Christina M. Rodriguez

Sociology & Criminal Justice Faculty Publications

One form of corporal punishment commonly used in the United States is spanking. Spanking is a well-known risk factor for adverse child development, although its influence on children's approaches to learning (ATL) has been largely overlooked. Existing research is particularly limited in inadequately considering multiple confounds and selection biases in children's exposure to spanking. This study examined the links between spanking and children's ATL, using a matched-group design to strengthen causal estimates among children aged 5 to 7.5 (N = similar to 12,800) from the Early Childhood Longitudinal Study, Kindergarten Class of 2010-2011. Entropy-balanced matching mitigated selection and confounding biases, …

U.S. Residents' Current Attitudes Towards Immigrants And Immigration: A Study From The Life In Hampton Roads Survey, Daniel K. Pryce

Sociology & Criminal Justice Faculty Publications

Immigration is a fiery topic in U.S. society, as it generally brings to a boil native-born citizens’ disparate attitudes toward immigrants and immigration. While immigration has its fierce supporters and opponents alike, the topic provides fodder for politicians who use it to stoke the fear of an impending “immigrant invasion” among citizens. This is why scholars must regularly undertake empirical studies to assess community members’ views about immigrants and immigration in U.S. society. To add to the contemporary immigration debate, I analyze data from a random sample of 610 respondents who reside in the seven cities that make up the …

The Ten Commandments In Louisiana Public Schools: A Study In The Survival Of Establishment Clause Norms, Ira C. Lupu, Robert W. Tuttle

GW Law Faculty Publications & Other Works

In June 2024, Louisiana enacted legislation requiring the prominent posting of the Ten Commandments on the wall of every public-school classroom. In Roake v. Brumley, a federal district court decided that the requirement violated the Establishment Clause. Judge DeGravelles’s lengthy opinion followed the Supreme Court’s 1980 decision in Stone v. Graham, which invalidated a highly similar Kentucky law. In late June 2025, in an opinion by Judge Ramirez, the U.S. Court of Appeals for the Fifth Circuit affirmed the district court in every significant respect. Texas recently enacted similar legislation, now under the cloud of Roake v. Brumley.

In this …

To Predict The Post-Chevron World, You Must Understand The Pre-Chevron World And Then Add Extreme Political Polarity, Richard J. Pierce Jr

GW Law Faculty Publications & Other Works

In this contribution to a symposium on the Supreme Court’s opinion in Loper Bright Enterprises v. Raimondo, Professor Pierce explains how the Court has created a legal environment that will lead to many serious problems. He provides a roadmap to avoid that result.

An Empirical Assessment Of New Jersey's Mistaken Imprisonment Act, Jeffrey Gutman

GW Law Faculty Publications & Other Works

In their article “Compensation for the Convicted Innocent in New Jersey: Problems and Recommended Solutions,” Professors D. Michael Risinger and Lesley Risinger masterfully recount the history and flaws of New Jersey’s Mistaken Imprisonment Act.1 The professors recommend concrete and common-sense amendments to the Act that, if enacted, would resolve statutory ambiguities, remedy bad public policy, and make more generous an Act intended to benefit the wrongfully convicted, but which often falls short of that goal.

This article will provide empirical and comparative context for the Risingers’ proposals. By examining why the claims of exonerees had been denied or never made, …

Policy Brief: The Hagerty-Scott-Lummis-Gillibrand Stablecoin Bill Would Cause Great Harm To Consumers, Investors, Our Financial System, And Our Economy, Arthur E. Wilmarth Jr.

GW Law Faculty Publications & Other Works

On February 4, 2025, Senators Bill Hagerty, Tim Scott, Cynthia Lummis, and Kirsten Gillibrand introduced a bill that would create a dangerously weak and deeply flawed regulatory regime for stablecoins. Their bill (the “Hagerty bill”) would allow stablecoins to be offered to the public without the protections provided by federal deposit insurance and other safeguards governing banks insured by the Federal Deposit Insurance Corporation (FDIC). The Hagerty bill would greatly increase the likelihood that future runs on stablecoins would trigger systemic crises requiring costly federal bailouts to avoid great harm to our financial system and economy.

A stablecoin is a …

Agency Delay And The Courts, Aram A. Gavoor, Steven A. Platt

GW Law Faculty Publications & Other Works

Administrative delay plagues the modern regulatory state, yet scholars and courts lack a coherent framework for analyzing when delay becomes unlawful and how to remedy it. This Article provides the first comprehensive examination of judicial oversight of agency delay, tracing the evolution from common law mandamus through the delay provisions of the Administrative Procedure Act. It reveals critical distinctions between these mechanisms that courts have increasingly elided, leading to doctrinal confusion and ineffective remedies. On account of the second Trump administration’s Department of Government Efficiency initiatives, this topic takes on unprecedented urgency because administration policies to reduce workforce and restructure …

Analyzing The Benefits Of Artificial Intelligence To Racially Inclusive Democracy, Spencer A. Overton

GW Law Faculty Publications & Other Works

Over the past two decades—as the United States has grown more ethnically diverse—the U.S. Supreme Court has dismantled key voting rights protections, and state legislatures have erected a record number of voting restrictions. Largely oblivious to this growing gap in legal protections, several artificial intelligence (“AI”) optimists have claimed that AI can help usher in a more inclusive, participatory, and unbiased democracy. Such an outcome, however, is far from guaranteed. This Article is the first to comprehensively examine the extent to which AI—and the legal frameworks that regulate it—can advance racially inclusive democracy. It responds to the AI optimism literature …

Justice Delayed By Design: The Harms Of Our Protracted Divorce System, Laurie S. Kohn

GW Law Faculty Publications & Other Works

Divorce is the termination of a legal relationship. It is necessary for the enforceable division of property and debts between spouses as well as for remarriage. However, it’s not simply a lawsuit. Instead, it most often involves a seismic shift in the very foundations of life and, as such, frequently provokes, exacerbates, and exposes insecurities, instabilities, and vulnerabilities. This legal process also involves a unique relationship between litigants who are former intimate partners—often co-parents—and who are largely unrepresented and therefore engaged in a new form of relationship as opposing parties to a lawsuit. Given these complex dynamics, one might hope …

Circuit Capture And The National Court Of Appeals, John P. Collins Jr.

GW Law Faculty Publications & Other Works

We are facing a crisis of confidence in our federal courts. Polarization in the judicial selection process and partisanship in judicial decision-making have yielded a steep decline in the public’s trust of the judicial branch. Much of the blame lies with the Supreme Court, whose repeated ethical scandals and aggressive rightward tilt have renewed calls for major court reform—from court packing to jurisdiction stripping, from term limits to lottery dockets, and much more in between. But the Supreme Court is not the only court in need of reform. The vast majority of cases go no further than the thirteen U.S. …

Standing, Randall S. Abate

GW Law Faculty Publications & Other Works

Chapter 4 explores the intricacies of the legal principle of standing, its role in climate litigation, and how it impacts the ability of parties to bring climate change-related lawsuits to trial. The author discusses interpretations of standing across different jurisdictions, such as the United States, New Zealand, and countries in Europe, and explains how these interpretations can either impede or facilitate climate litigation. He distils emerging best practice from this analysis, providing an insightful guide for future climate lawsuits. The author then identifies emerging best practice in interpreting standing rules in a flexible manner, thus allowing a broader range of …

The Looming Threat Of Uninsured Nonbank Stablecoins, Arthur E. Wilmarth Jr.

GW Law Faculty Publications & Other Works

On May 21, 2025, the U.S. Senate voted to begin final consideration of the “GENIUS Act.” Despite its lofty title, the bill would create grave threats to our financial system and economy by allowing nonbanks to issue stablecoins without the protections provided by federal deposit insurance and other regulatory safeguards governing FDIC-insured banks. The GENIUS Act would set the stage for future runs on stablecoins triggering systemic financial crises and requiring government bailouts.

The great majority of global stablecoins promise to maintain parity with the U.S. dollar and are functionally equivalent to bank deposits. Stablecoins are mainly used as payment …

Feature Comment: Institutional Amnesia And The Neglect Of The Federal Acquisition Workforce, Jessica Tillipman, Steven L. Schooner

GW Law Faculty Publications & Other Works

Public procurement regimes may be constrained by rules, but people - procurement professionals - animate the process. Despite spending over $750 billion last year on federal contracts, the U.S. Government continues to deprioritize the professional capacity of its acquisition workforce. This article bemoans and critiques the persistent failure to recruit, develop, and retain procurement personnel, a failure exacerbated by politically driven downsizing, inadequate investments in workforce development, and misplaced reliance on procedural reform—most recently evidenced by the so-called “Revolutionary FAR Overhaul.” Drawing on historical data, case studies, and recent Government Accountability Office reports, the authors document how decades of underinvestment …

Police Officer Use Of Force And Officer-Created Jeopardy After Barnes V. Felix: The Supreme Court’S Important (Albeit Incomplete) Step In The Right Direction, Cynthia Lee

GW Law Faculty Publications & Other Works

On May 15, 2025, the Supreme Court issued a unanimous decision in Barnes v. Felix, rejecting the Fifth Circuit’s “moment of threat” doctrine, which limited courts assessing the reasonableness of a law enforcement officer’s use of force to considering only those facts and circumstances known to the officer at the moment of the threat. Under the Fifth Circuit’s narrow time-framing approach, any pre-seizure conduct of the officer, i.e., acts occurring before the officer seized the individual, that may have contributed to the dangerous situation could not be considered as part of the reasonableness inquiry.

Pre-seizure officer conduct that contributes to …

The Future Of The Duty To Engage In Reasoned Decision Making: The Choice Between A Textual Approach And A Pragmatic Approach, Richard J. Pierce Jr

GW Law Faculty Publications & Other Works

In this contribution to a symposium on the future of the duty to engage in reasoned decision making, Professor Pierce argues that the Supreme Court faces a decision whether to retain the present robust version of the duty to engage in reasoned decision making and to extend it to actions taken by the president or to abandon or greatly weaken it. He urges the Court to retain and expand the scope of the duty to include actions taken by the president. He expresses concern, however, that the Court may instead abandon or significantly weaken the duty.