Digital Commons Network^™

The Use Of Machine Learning Algorithms For Water Quality Index Prediction In The Sai Gon River, Vietnam, Thuy Nguyen Thi Diem, Mai Nguyen Thi Huynh, Tra Tran Quang

Applied Environmental Research

Accurate prediction of the water quality index (WQI) lays the groundwork for integrated river basins and sustainable water resource management. Recent and accelerated advances in machine learning have led to various promising applications in water quality assessment. The present study leverages the predictive performance of several ML algorithms, including extreme gradient boosting (XGB), the gradient boosting model (GBM), support vector regression (SVR), and the radial basic function (RBF), to predict the WQI at three monitoring sites on the Sai Gon River from 2015–2019. In comparison, the results indicate that the XGB model outperforms the other models when eight parameters, including …

Effects Of Herbicides On 2,4-D-Resistant Soil Microorganisms In Maize Cultivation In Lopburi Province, Thailand, Boontarik Chimchart, Jitra Kokaew, Amnat Eamvijarn, Kanokon Bunpha, Sontaya Khamtib, Monchai Manassila, Tawatchai Inboonchuay

Applied Environmental Research

This study aimed to assess the impact of herbicide application on soil micro-organism density and to identify microorganisms resistant to 2,4-D-dimethyl-ammonium (2,4-D) for potential biodegradation. Research was conducted in maize plots in Lopburi Province, where 2,4-D was applied at a rate of 120 g of active ingredient per 160 m2. The soil samples were collected at various intervals: before application; 2 and 4 hours postapplication; and 1, 3, and 7 days after application. The analyses included soil property and microorganism population analyses. The results indicated that 2,4-D applications significantly increased bacteria and fungi in the treated plots compared with those …

Kinetics Of Hexavalent Chromium Adsorption And Reduction By Living Cells Of The Marine Bacterium Bacillus Cereus, Jittima Charoenpanich, Wachiraphorn Cherdchoo, Jutamas Pantab, Jariya Supakrit

Applied Environmental Research

This study identified Bacillus cereus, an efficient Cr(VI) bioreducer, isolated from marine sediment in Thailand. Batch experiments verified the complete removal of 25 mg L-1Cr(VI) from synthetic wastewater (pH 7.0) after 6 days at 37 °C, 50 rpm,and a biomass concentration of 25% (v/v) culture inoculum. The Freundlich isotherm model demonstrated the best correlation with the Cr(VI) adsorption equilibrium data in the 25–100 mg L-1concentration range (R2= 0.9831). Kinetic analyses indicated that the removal of Cr(VI) by living B. cereusfollowed a pseudo-second-order adsorption model (R2= 0.9875) and a pseudo-second-order reduction model (R2= 0.9807). The adsorption rate can be accuratelycharacterizedvia the …

Uprooted, Olie Espinoza

Humboldt Journal of Social Relations

"I showcase what José Esteban Muñoz (2020) theorizes as “brown commons,” as I am brown and comprised of brown people and things. This piece was also inspired by..."

California Winter, Kamar Alexander Little

Humboldt Journal of Social Relations

"I created this music video reflection with the song “California Winter.” It is a track from the sophomore album of pop artist Dhruv titled Private Blizzard..."

Patent Infringement In Time, John R. Thomas

Georgetown Law Faculty Publications and Other Works

No patent lasts forever. When intellectual property rights expire, a canonical principle states, all benefits of their ownership cease. But patents may cast a long shadow after they are gone, hindering the advent of immediate competition upon their expiration. The law acts unevenly in these circumstances, leading to questionable intellectual property and public health policies. Ordinarily competitors cannot make and use a patented invention until the patent's term has concluded. This delay ordinarily extends the effective period of exclusivity that the patentee enjoys. However, a statutory safe harbor shields from infringement acts undertaken "solely for uses reasonably related" to Food …

I Hate Self-Care: A Criminal Defense Lawyer’S Lament, Abbe Smith

Georgetown Law Faculty Publications and Other Works

Don’t get me wrong—I think people should take care of themselves. They should eat well, exercise regularly, and get a good night’s sleep. They should spend time with friends and family. They should have hobbies and interests. With any luck, they should find true love. But in the past decade or two, and especially since the COVID pandemic, there has been a disturbing turn inward. I’m talking about the “self-care” craze, which has become its own pandemic, or at least epidemic.

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In this Essay, I share my concerns about what I regard to be an excessive focus on self-care …

Understanding Disputes Over Digitalization: A Perspective Of Cross-Border Central Bank Digital Currencies, Heng Wang

Emory International Law Review

In a rapidly digitalizing world, complex disputes arise due to technological, regulatory, and other complexities. Public and private actors—including central banks, financial institutions, tech firms, and law firms—need to understand the complexity of these disputes before determining whether and how to engage with ongoing digitalization.

Given the fundamental role of currency in the world economy, this article examines central bank digital currency (CBDC) as a pivotal case study. CBDCs, representing the digitalization of central bank money, are a novel digital form of national currency issued by central banks. Various central banks, including those of the Eurozone, Switzerland, the United …

Research Report: Cold-Hardy Hydrangeas For Landscape And Cut Flowers, Rebecca G. Sideman, Kaitlyn Orde, Ella Lukacz, Cathy Neal

Faculty Publications

This research report describes the performance of several cold-hard “panicle” (H. paniculata), “smooth” (H. arborescens), and “oakleaf” (H. quercifolia) hydrangea as landscape plants and for cut flower production in Durham, NH. We established a replicated planting of sixteen newer hydrangea cultivars at Woodman Farm in summer 2020. Preliminary data from these young shrubs indicates that there are wide differences in flower production, stem quality, flowering time and duration, and postharvest floral quality – among other traits.

Orchestrating Digital Technologies With Incumbent Enterprise Systems For Attaining Innovation, Sachithra Lokuge, Darshana D. Sedera, Varun Grover, Suprateek Sarker

Information Systems Faculty Publications and Presentations

In the late 1990s, most organizations adopted enterprise systems (ES) to automate their core business processes. The very same organizations are presented with a new wave of opportunities to innovate with digital technologies—technologies that purport to have diametrically opposed characteristics to ES. This study explores how organizations integrate digital technologies with their incumbent ES for attaining innovation. The study followed a qualitative approach and gathered data from four organizations consisting of six such projects. By applying a unique theoretical foundation, this study derives interesting insights into the orchestration process of ES and digital technologies for attaining innovation.

Originalism's Difference?, Sherif Girgis

Journal Articles

From the Aritcle

My topic is whether originalism makes any practical difference to constitutional reasoning and outcomes, relative to other methods of interpretation.

INTRODUCTION ............................................. 1945

I. JUSTICE SCALIA'S VISION OF CONTRASTS .................. 1949

II. THE BREAKDOWN OF CONTRASTS ........................... 1952

III. REMAINING CONTRASTS: REAL BUT ELUSIVE TO THEORY....................................................... 1961

IV. THE CHAMBERS ORIGINALISM DIFFERENCE .................. 1966

CONCLUSION: LOOKING AHEAD ................................ 1973

Using Geographic Interviews To Conduct Community Assessments—Insights For Msw Pedagogy, Danielle Maude Littman, Denae J. Cook, Amie Thurber

School of Social Work Faculty Publications and Presentations

Social work is predicated as a person-in-environment profession, but few tools presently exist for students to operationalize person-in-environment through assessment and systematic understanding. Geographic interviews, which combine spatial mapping and qualitative go-along interviews, are one possible tool with promise for application in the social work classroom. This teaching note describes the process of integrating geographic interviews as one data collection method MSW students could utilize in a community assessment assignment. We share learnings from student assignments (N = 8) and instructor focus groups (N = 4). We found that while there was a high level of student and instructor interest, …

Pozen And The Puzzle Of Counterfactuals, Louis Michael Seidman

Georgetown Law Faculty Publications and Other Works

The Constitution and the War on Drugs, David Pozen’s carefully researched and brilliantly argued book, is both illuminating and disturbing: illuminating because it unearths forgotten moments when judicially formulated constitutional doctrine that could have ended or sharply restricted the War on Drugs were well within the Overton Window, and disturbing because it surfaces hard questions about historical contingency and the scope of the change that might have occurred in a counterfactual world. In this review, the author argues that the failure to specify both the nature of the counterfactual and the breadth of the alternative possibility have confused discussions …

Optical Coherence Tomography Harmonization With Anatomy-Guided Latent Metric Schrödinger Bridges, Shuwen Wei, Blake E. Dewey, Samuel W. Remedios, Bruno Jedynak, Shimeng Wang, Peter Calabresi, Shiv Saidha, Aaron Carass, Multiple Additional Authors

Mathematics and Statistics Faculty Publications and Presentations

Medical image harmonization aims to reduce the differences in appearance caused by scanner hardware variations to allow for consistent and reliable comparisons across devices. Harmonization based on paired images from different devices has limited applicability in real-world clinical settings. On the other hand, unpaired harmonization typically does not guarantee anatomy consistency, which is problematic because anatomical information preservation is paramount. The Schrödinger bridge framework has achieved state-of-the-art style transfer performance with natural images by matching distributions of unpaired images, but this approach can also introduce anatomy changes when applied to medical images. We show that such changes occur because the …

Mock: An Algorithm For Learning Nonparametric Differential Equations Via Multivariate Occupation Kernel Functions, Victoria A. Rielly, Kamel Lahouel, Ethan Lew, Nicholas Fisher, Vicky Geneva Haney, Michael Wells, Bruno M. Jedynak

Mathematics and Statistics Faculty Publications and Presentations

Learning a nonparametric system of ordinary differential equations from trajectories in a -dimensional state space requires learning functions of variables. Explicit formulations often scale quadratically in unless additional knowledge about system properties, such as sparsity and symmetries, is available. In this work, we propose a linear approach, the multivariate occupation kernel method (MOCK), using the implicit formulation provided by vector-valued reproducing kernel Hilbert spaces. The solution for the vector field relies on multivariate occupation kernel functions associated with the trajectories and scales linearly with the dimension of the state space. We validate through experiments on a variety of simulated and …

Unsupervised Oct Image Interpolation Using Deformable Registration And Generative Models, Shuwen Wei, Samuel W. Remedios, Bruno Jedynak, Peter Calabresi, Shiv Saidha, Aaron Carass, Multiple Additional Authors

Mathematics and Statistics Faculty Publications and Presentations

Optical coherence tomography (OCT) images are often acquired as highly anisotropic volumes, where the scanning step is dense along the fast axis but sparse along the slow axis. This affects image analysis, such as image registration for longitudinal alignment. To create more isotropic volumes, bicubic interpolation can be used along the slow axis, but it generally produces blurry features. Registration-based interpolation can reduce blurriness, but often fails to generate realistic OCT images. Deep generative models can sample realistic images, but lack the structural consistency constraints required for interpolation. In this paper, we propose an unsupervised image interpolation method that combines …

The Matryoshka Doll Prior – Principled Multiplicity Correction In Bayesian Model Comparison, Andrew Womack, Daniel Taylor-Rodríguez, Claudio Fuentes

Mathematics and Statistics Faculty Publications and Presentations

This paper introduces a general and principled construction of model space priors with a focus on regression problems. The proposed formulation regards each model as a “local” null hypothesis whose alternatives are the set of models that nest it. Assuming constant ratio of prior probabilities for any “local” null and its alternatives provides a natural isomorphism of model spaces (like a matryoshka doll), constituting an intuitive way to correct for multiplicity in Bayesian model selection and averaging problems. This isomorphism yields the Poisson distribution as the unique limiting distribution over model dimension under mild assumptions. We compare this model space …

Recontextualizing Engagement With Data Visualizations In The Context Of The Socio-Ecological, Eva Thanheiser, Laurie Rubel, Beth Herbel-Eisenmann, Courtney Koestler

Mathematics and Statistics Faculty Publications and Presentations

We explore how data visualizations (DVs) are representational tools that can be used to narrate certain aspects of a context but silence others. Using multiple DVs allows for contrasting the DVs and likely provides opportunities for critical reading and exploring the entanglement of political and ecological dimensions of an issue. We start by integrating two sets of practices, Notice, Wonder, Feel, Act and Reimagine (NW-FAR) (Kahn, et al., 2022) and critical graph reading, Framing, Formatting, Narrating (FFN) (Rubel, et al., 2021) towards taking a socio-political stance and supporting students to read data visualizations and develop critical data literacy. We look …

Belonging: Data Reasoning, About Ourselves And Others, Eva Thanheiser, Molly Robinson, Simon Byeonguk Han, Amanda Sugimoto, Courtney Koestler, Mathew Felton-Koestler

Mathematics and Statistics Faculty Publications and Presentations

Using Watson’s belonging framework and GAISE II data reasoning, this lesson invites students to collect, analyze, and represent personal data. In doing so, they see themselves and their peers reflected in the work, reinforcing their value as active participants in both mathematical thinking and the classroom community.

The Forms Of Representation: How To Be A Kantian Realist, Willem A. Devries

Faculty Publications

Sellars argued that Kant did not make certain distinctions concerning space and time, and because of this adopted his transcendental idealism. Once these distinctions are made, the path to realism remains open. Sellars' argument is not entirely clear. This essay attempts to clarify the argument, showing why Sellars believed he could remain a scientific realist while also adopting a Kantian style epistemology.

Frost Heave Physical Simulation Testing Apparatus, Noah Edgar , '25

Senior Theses, Projects, and Awards

The uplift forces exerted on lightly loaded pile foundations through the heaving stresses developed in freezing soils can have a significant impact on the design and cost of the foundations for utility scale solar generation facilities. Since the adfreeze stress that exerts the uplift force is highly dependent on the soil type, a one-size fits all approach to this frost heaving behavior is ineffective. To solve this issue, a testing apparatus was designed that can be repeatedly used to more accurately determine the heaving stresses that will develop given a specific soil type. The testing apparatus uses the soil collected …

“Finally Girls Hitting A Celly:” Emotions And Gender Embodiment In Competitive Swimmers’ Post-Race Celebrations, Lauren Q. Rohde , '25

Senior Theses, Projects, and Awards

In athletic competitions, the moment of achievement is often extremely cathartic and results in a visible celebration. In competitive swimming, these reactions to success are isolated to the end of a race, completely individual, and often feature interaction with one’s surroundings, such as the water or lane lines. These moments are also highly visible and usually well-photographed, and the visibility of these actions contributes to a growing culture in the sport around post-race celebrations. The exposure of the body in competitive swimming additionally contributes to its visibility, further complicating behaviors and norms around celebrating race outcomes. This research aims to …

La Beauté Ignoble Du Cadavre. Regard Scientifique Et Regard Artistique Dans Thérèse Raquin D’Émile Zola, Shreya Patel , '25

Senior Theses, Projects, and Awards

No abstract provided.

Prisons Are A Public Health Crisis: Alabama Paves The Way, Rae Peeples , '25

Senior Theses, Projects, and Awards

No abstract provided.

Case—Optimizing Transportation And Equity In A District Zoning Problem For Orville Public Schools, Kelly M. Sullivan, Ashlea Bennett Milburn

Industrial Engineering Faculty Publications and Presentations

ORPS is highly regarded in the ORville community for providing a quality education that inspires and equips all students to achieve success in their learning and life endeavors. Population growth in the region and strong demand for an ORPS education have led to growing student enrollments. Accommodating this growth is a challenge for ORPS. When new campuses are needed, the process of acquiring land and building a new school takes years. The district must continually anticipate where in town enrollments will grow and monitor existing capacities against projected enrollments to ensure that capacity is in the right locations and at …

Understanding The Landscape Of Lumbar Epidural Steroid Injections: A Review Of Interlaminar, Transforaminal, And Caudal Approaches, Tommy Li, Cynthia Gonzalez, Jamie Provost, Jamal Hasoon, Anvinh Nguyen

Faculty, Staff and Students Publications

Purpose of the review: Lumbar epidural steroid injections (ESIs) have been used for decades for managing lumbosacral pain, particularly in patients with radiculopathy and chronic low back pain. Despite frequent use, there remains debate regarding their overall effectiveness, fueled by variability in physician technique and differing opinions on the optimal approach. This narrative review examines the three primary methods of lumbar ESI administration-transforaminal, interlaminar, and caudal-to evaluate their respective advantages, limitations, and clinical applications.

Summary: Each ESI technique offers unique benefits and potential risks. The transforaminal approach provides targeted delivery to affected nerve roots but is associated with higher risks …

Goldenbraid20 E Coli: A Comprehensive And Characterized Toolkit For Enterics, Matthew B Cooke, Kobie T Welch, Laura D Ramirez, Alice X Wen, David C Marciano, Christophe Herman

Faculty, Staff and Students Publications

Modular cloning systems streamline laboratory workflows by consolidating genetic 'parts' into reusable and modular collections, enabling researchers to fast-track strain construction. The GoldenBraid 2.0 modular cloning system utilizes the cutting property of type IIS restriction enzymes to create defined genetic 'grammars', which facilitate the reuse of standardized genetic parts and assembly of genetic parts in the right order. Here, we present a GoldenBraid 2.0 toolkit of genetic parts designed to accelerate cloning in the model bacterium

Igf-1 Impacts Neocortical Interneuron Connectivity In Epileptic Spasm Generation And Resolution, Carlos J Ballester-Rosado, John T Le, Trang T Lam, Anne E Anderson, James D Frost, John W Swann

Faculty, Staff and Students Publications

Little is known about the mechanisms that generate epileptic spasms following perinatal brain injury. Recent studies have implicated reduced levels of Insulin-like Growth Factor 1 (IGF-1) in these patients' brains. Other studies have reported low levels of the inhibitory neurotransmitter, GABA. In the TTX brain injury model of epileptic spasms, we undertook experiments to evaluate the impact of IGF-1 deficiencies on neocortical interneurons and their role in spasms. Quantitative immunohistochemical analyses revealed that neocortical interneurons that express glutamic acid decarboxylase, parvalbumin, or synaptotagmin 2 co-express IGF-1. In epileptic rats, expression of these three interneuron markers were reduced in the neocortex. …

Research For All: Building A Diverse Researcher Community For The All Of Us Research Program, Rubin Baskir, Minnkyong Lee, Sydney J Mcmaster, Jessica Lee, Faith Blackburne-Proctor, Romuladus Azuine, Nakia Mack, Sheri D Schully, Martin Mendoza, Janeth Sanchez, Yong Crosby, Erica Zumba, Michael Hahn, Naomi Aspaas, Ahmed Elmi, Shanté Alerté, Elizabeth Stewart, Danielle Wilfong, Meag Doherty, Margaret M Farrell, Grace B Hébert, Sula Hood, Cheryl M Thomas, Debra D Murray, Brendan Lee, Louisa A Stark, Megan A Lewis, Jen D Uhrig, Laura R Bartlett, Edgar Gil Rico, Adolph Falcón, Elizabeth Cohn, Mitchell R Lunn, Juno Obedin-Maliver, Linda Cottler, Milton Eder, Fornessa T Randal, Jason Karnes, Kitani Lemieux, Nelson Lemieux, Nelson Lemieux, Lilanta Bradley, Ronnie Tepp, Meredith Wilson, Monica Rodriguez, Chris Lunt, Karriem Watson

Faculty, Staff and Students Publications

OBJECTIVES: The NIH All of Us Research Program (All of Us) is engaging a diverse community of more than 10 000 registered researchers using a robust engagement ecosystem model. We describe strategies used to build an ecosystem that attracts and supports a diverse and inclusive researcher community to use the All of Us dataset and provide metrics on All of Us researcher usage growth.

MATERIALS AND METHODS: Researcher audiences and diversity categories were defined to guide a strategy. A researcher engagement strategy was codeveloped with program partners to support a researcher engagement ecosystem. An adapted ecological model guided the ecosystem …

Prevalence Of Exocrine Pancreatic Insufficiency In Patients With Chronic Diarrhea, Tara Keihanian, Suneal Agarwal, Nabil Mansour, Michael Mercado, Hashem B El-Serag, Mohamed O Othman

Faculty, Staff and Students Publications

Background: Exocrine pancreatic insufficiency (EPI) is an underdiagnosed entity among patients with new-onset chronic diarrhea (CD). The aim of this study is to investigate the prevalence of EPI in patients with CD.

Materials and methods: Patients with new-onset CD (≥4 weeks) from 2018 to 2021 were enrolled in this single-center prospective study. If stool fecal elastase (FE) was < 200 μg/g, patients were offered a confirmatory 72-hour fecal fat test.

Results: FE testing was completed by 97 patients, of which 9 had low FE (9.3%). Average weight was significantly higher in patients with low FE (98.5 ± 29.3 kg vs 82.2 ± 22.2 kg; P = 0.045). There was no significant difference …