Digital Commons Network^™

Decoding Early Covid-19 Responses Using Mathematical Modeling Of Social Distancing Strategies Across Multiple Countries, Sri Gunturu, Suki Lewis, Katelyn Nguyen, Asma Azizi

Spora: A Journal of Biomathematics

During the early phase of the COVID-19 pandemic, before vaccines were available, countries implemented diverse combinations of social-distancing (SD) measures shaped by cultural norms and public acceptance. These differences produced varied outcomes in controlling viral spread, offering lessons for future health-crisis preparedness. We performed a reverse-engineering analysis of early COVID-19 case data from five socioculturally distinct countries—India, Vietnam, Italy, Finland, and the United States—selected to capture a range of initial prevalence levels. Using mathematical modeling and data fitting, we inferred the relative contributions of three SD interventions: face masking, quarantine, and isolation of infected individuals. We then employed an efficiency …

Optimal Intervention Strategies In Age-Structured Sirvd Model: Epidemiological And Economic Analysis Of Covid-19 In Korea, Joon Chun, Melisa Hendrata

Spora: A Journal of Biomathematics

This study employed an age-structured Susceptible-Infected-Recovered-Vaccinated-Deceased (SIRVD) model to design optimal COVID‑19 intervention strategies by integrating epidemiological dynamics with economic costs. Using empirical data from South Korea, we estimated transmission parameters and analyzed quarantine-based non-pharmaceutical interventions (NPIs) alongside targeted vaccination scenarios. Our results indicated that a stronger form of mild NPI (upper range of Level I), when combined with targeted vaccination that prioritized seniors, achieved substantial reductions in infection peaks and overall economic burden. These findings underscore the effectiveness of age-specific strategies in epidemic management and offer critical insights for policymakers seeking balanced, resource-efficient approaches.

Inhomogeneous Branching Random Walks: Incorporating Genealogy And Density Effects, Lauren Ajax, Beatrice Durham, Pratima Hebbar, Cade Johnston, Jiayi Zhang

Spora: A Journal of Biomathematics

We introduce a novel framework using inhomogeneous branching random walks (BRWs) to model biological processes, specifically by introducing genealogy-dependence in branching rates and displacement distributions to model bacterial colony growth. Current stochastic models often either assume independent and identical behavior of individual agents or incorporate only spatiotemporal inhomogeneity, ignoring the effect of genealogy-based inhomogeneity on the long-time behavior of these processes. Such asymptotics are of independent mathematical interest and are crucial in understanding the emergence of patterns. We propose several inhomogeneous BRW models in 2D space where displacement distributions and branching rates vary with time, space, and genealogy. A combined …

Bringing Math Circles Into New Mexico Classrooms: An Interview With James Taylor, Amanda Serenevy

Journal of Math Circles

In this interview, conducted on December 14th, 2022, James described his math outreach journey and the many members of the Math Circle community who helped him along the way.

The Kaplans’ Influence On The History Of Math Circles In The Us: An Interview With Tatiana Shubin, Rodi Steinig

Journal of Math Circles

Tatiana Shubin [1] was among those who pioneered Math Circles on the West Coast of the United States in the 1990s. She continues to innovate and pivot to make the Math Circle message and experience accessible to all. At the 2021 Circle on the Road conference, Tatiana Shubin presented the talk “Math Circles: A Quick Early History,” and the recording is archived on the Math Circle Network webpage [2]. In the spring of 2022, Rodi Steinig interviewed Tatiana to discuss this talk through two lenses. First, the lens of the role the Kaplans played in the broader history of Math …

Corresponding With The Kaplans, Rodi Steinig

Journal of Math Circles

Readers of this journal have asked to hear the Kaplans’ voices: their tone, the way they were able to contextualize math questions, their generosity, and their joy. We think it’s important to share a few of these hundred-plus emails so that readers can feel that tone.

The Kaplans’ Math Circle Method, Amanda Serenevy

Journal of Math Circles

This essay explores what is meant by "The Socratic Method" in classical and modern times and examines the extent to which the Kaplans employed it in their Math Circles. We offer an imagined dialogue between the Kaplans and their students on the same mathematical subject explored by Socrates and the slave boy in Plato's dialogue \emph{Meno} to illustrate how the Kaplans might have handled that topic

The Joy Of Participatory Learning: The Math Circle, Peter Flom

Journal of Math Circles

Peter Flom was inspired to write this blog post after visiting the Kaplans' Math Circle in Boston.

The Sunday Math Circle, Nathan Pflueger

Journal of Math Circles

Bob and Ellen Kaplan envisioned and organized a style of math circle centered on the idea that children of all ages can work like mathematicians do: creatively, collaboratively, and ecstatically. This article surveys four sample topics covered during a Sunday morning math circle in the Boston area, based on Bob and Ellen's invaluable guidance. I also offer some reflections on what I learned from Bob and Ellen, and how it is reflected in these math circles.

The Polymathematician, Leo Goldmakher

Journal of Math Circles

In loving memory of Bob Kaplan, the wisest and most inspiring seven-year-old I’ve ever met.

The Pedagogical Lineage Of The Kaplans And Its Future, Taylor Yeracaris

Journal of Math Circles

This article describes the origins of Bob and Ellen Kaplan's Math Circle, one of the first Math Circles in the U.S. It covers Bob and Ellen's personal histories and some of the wide-ranging impact of their work and philosophy of teaching. It also discusses how the current form of their organization, The Global Math Circle, is working to carry forward their legacy, including building community and supporting Math Circle leaders with the Nexus project.

Introduction To The Special Issue Honoring Bob And Ellen Kaplan, Amanda Serenevy, Rodi Steinig

Journal of Math Circles

In 1994, Bob and Ellen Kaplan embarked together with other friends and colleagues on a wonderful adventure. Friends had lamented that there was a lack of high-quality math learning experiences for kids along the lines of the Math Circles offered in the former Soviet Union, so the Kaplans decided to do something about it. This special issue is dedicated to a remembrance of that adventure and its impact on the mathematical and personal development of many people.

Synthetic Organismic Governance: The Utlp Architecture For Biological Time Synchronization, Liquid Aperture Synthesis, And The Epistemology Of Generative Prior Art, Steven Kirkland

Defensive Publications Series

This technical supplement extends the Universal Time Lord Protocol (UTLP) by formalizing the "Mind-Body" governance model required for planetary-scale distributed systems. It asserts that while application layers may utilize political consensus, the underlying timing and transport layers must operate on pre-rational biological principles to maintain stability under relativistic conditions.

This document establishes 103 Prior Art Claims, detailing the specific mechanisms that allow silicon nodes to mimic the homeostatic resilience of biological organisms. Key contributions include:

• Physics (The Liquid Aperture): Defining the governance logic for a Liquid Software-Defined Aperture, where the synchronization layer utilizes "Servo-Locked" frequency modulation (slewing) rather …

  ---

  Go to article

2026 January - Tennessee Climate Snapshot, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Monthly Reports

No abstract provided.

2026 January - Tennessee Monthly Climate Report, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Monthly Reports

Hi All,

The main weather and climate story of January 2026 was the major winter storm that impacted the state from Saturday, January 24 through Monday, January 26 with rain, freezing rain, sleet, and snow, followed by extremely cold conditions. Winter storm warnings and winter weather advisories were in place across the state on Friday, January 23, as snow and sleet spread into Tennessee from the west in the overnight hours of Friday into Saturday. Most areas of the state saw an initial round of snow and sleet, before a layer of warm air aloft caused most locations to see …

Infinite Line, Infinite Knowledge: The 'Spera' And Organized Chaos In Lambert's Encyclopedia, The 'Liber Floridus', Ava Romano

Theses and Dissertations

The Liber Floridus is a medieval encyclopedia renowned for its program of circular diagrams, or sperae. Inside this manuscript of 190 chapters, these diagrams frame and embody written knowledge, revealing a connection between encyclopedism and life in the Benedictine monastery by creating a coherent visual organization of chapters.

Simulation Of Quantum Walks For Secure Data Access Patterns, Arslan Ahmad Janjua

Theses and Dissertations

Quantum computing is revolutionizing computational science, offering fundamentally new approaches to information processing that surpass classical limitations. One of the most versatile and powerful tools in this emerging field is quantum walks. Quantum walks are quantum analogs of classical random walks that leverage superposition and interference to explore complex spaces efficiently.

This thesis will explore how discrete-time scattering quantum walks can be simulated and analyzed to investigate patterns of secure data access. By modeling quantum walks on a variety of graph structures and studying the dynamics of marked vertices, the project aims to demonstrate how quantum interference and graph topology …

Structural Characterization Of Peptide Nanoaggregates At Varying Concentrations And Their Impact On Cellular Responses, Malika Rozmetova

Theses and Dissertations

Peptide nano-assemblies can regulate cellular pathways in a structure-dependent manner. Here, we show that the enzyme-responsive peptide NapFFK(NBD)Yp forms distinct nanoscale assemblies at different concentrations, triggering differential ER stress and extracellular vesicle release in MDA-MB231 cells. These results highlight the importance of supramolecular organization in peptide–cell interactions.

Flux Crystal Growth Of Potassium Lanthanide Double Vanadates With Lanthanide-Dependent Coordination Number Variance, Hunter B. Tisdale, Hans Conrad Zur Loye

Faculty Publications

A series of potassium rare earth double vanadates is presented. Single crystals of double vanadates with stoichiometry K₃Ln(VO₄)₂ (Ln = La, Pr, Nd, and Sm) and crystallizing in the glaserite structure type were synthesized via a molten alkali chloride/fluoride flux reaction. Different structures were observed depending on the constituent rare earth: K₃La(VO₄)₂ crystallizes in an as-of-yet unreported modification of the typical glaserite structure in the space group P2₁/c, likely due to its larger ionic size that results in an increase in the lanthanide coordination number …

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-06 Site Evaluation Summary Report (Dated December 10, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-22 Site Evaluation Summary Report (Dated December 10, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

A Visualization-Supported, Hierarchical, Action-Learning Model For Driving Behavior In A V2x Environment, Xuantong Wang, Jing Li, Jecca Bowen

Geography and the Environment: Faculty Scholarship

Understanding human driving decisions is crucial for intelligent transportation research. Most existing studies focus on individual vehicles in limited contexts, which restricts broader applicability of results. Leveraging Vehicle-to-Everything (V2X) infrastructure, this study introduces a machine learning framework to model driving actions and detect outliers across diverse environments. This approach features a semantically enabled clustering method that groups similar driving behaviors based on speed and actions. It also adds a time-series learning model to identify typical driving behaviors across various contexts, thereby enabling detection of abnormal driving actions. A suite of visual tools has been developed to help interpret driving patterns, …

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Revised Draft Final 2022 Unreclaimed Sites Sampling: Ur-12 Site Evaluation Summary Report (Dated December 9, 2025), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

A Recurrent Neural Network For Forecasting Dead Fuel Moisture Content With Inputs From Numerical Weather Models, Jonathon Hirschi, Jan Mandel, Kyle Hilburn, Angel Farguell

Faculty Research, Scholarly, and Creative Activity

This paper proposes a recurrent neural network (RNN) model of dead 10 h fuel moisture content (FMC) for real-time forecasting. Weather inputs to the RNN are forecasts from the High-Resolution Rapid Refresh (HRRR), a numerical weather model. Geographic predictors include longitude, latitude, and elevation. Forecast accuracy is estimated in a study that utilizes a spatiotemporal cross-validation scheme. The RNN is trained on HRRR forecasts and observed FMC from weather station sensors within the Rocky Mountain region in 2023, then used to forecast FMC at new locations for all of 2024. The model is evaluated using a 48 h forecast window. …

Cognitive And Economic Development, John Luke Gallup

Economics Faculty Publications and Presentations

A burgeoning literature has found that early childhood health conditions of individuals have large causal effects on their cognitive development, education and earnings. How much does early cognitive development contribute to the national economy? Although researchers have long studied the role of worker health for economic growth, they have not assessed the role of early cognitive development.

Cognitive ability is the foundation of human capital, affecting both educational attainment and economic growth. The risk factors for poor cognitive development are very high in many countries. Each risk factor also causes child mortality, making child survival a viable proxy for good …

Exploring The Role Of Occupational Therapy In The Delivery Of Trauma-Informed Services To Hospital-Based Clients Ot, Frank Czuba

Journal of Applied Disciplines

Hospitalization can traumatize clients and impact overall health outcomes, leading to increased hospital readmission rates and resulting in a negative impact for both clients and providers. Limited information exists regarding how hospital-based occupational therapists evaluate and address trauma, even though incorporating trauma-informed principles into professional practice can enhance the occupational therapy process. The study explored the comprehension and perceived significance of trauma-informed tenets among occupational therapists delivering services in hospital-based settings. A quantitative research study with an exploratory design was implemented to explore how occupational therapists (OT) understand and utilize trauma-informed practices with their clients in a hospital setting. An …

The Impact Of Natural Cavities On Mining Feasibility In Brazil: Dilemma Between The Sustainability Of Mining Operations And The Environment, Tiago Leite, Felipe Souza, Mariana Silva, Iuri Brandi, Hernani De Lima

Journal of Sustainable Mining

Due to the legislation on natural underground cavities in Brazil, mineral reserves have been blocked, causing a great dilemma between the sustainability of the mineral activity and the preservation of cavities. This study presented an analysis of the evolution of the federal cave legislation, pointing out the main gains and contribution to the theme, in which the importance in the Brazilian scenario of the publication in 2017 of Normative Instruction N° 01, which updated the procedures for the definition of these “other forms of compensation” to the irreversible negative impact on cavities with a high degree of relevance. In this …

Multivariate Stochastic Mine Scheduling Targeting Stationary Grades Considering Risk Uncertainty And Hierarchical Variables, Augusto A. T. Toledo, Joao F. C. L. Costa, Diego M. Marques, Luciano N. Capponi

Journal of Sustainable Mining

In short-term mine planning for deposits characterized by multiple variables, sequential diglines are generated with an emphasis on maintaining consistent grade distributions across mining periods. This research integrates an array of mineral variables, including deleterious elements, to facilitate the establishment of excavation geometries that enable precise grade and volume control within operational production zones. Through the systematic application of geostatistical analysis coupled with process optimization, geological risks associated with grade uncertainties are minimized, and an optimized operational sequence for the extraction of mineral blocks is pursued. The main point of this approach is maintaining grade distributions aligned with the historical …

An Innovative Implicit Modeling Technique To 3d Deposit Modeling: A Case Study Of The Chromite Mine, Ali Can Ozdemir Ozdemir, Yavuz Tore

Journal of Sustainable Mining

The location of an orebody known to show regional variability in space is determined only through 3D geological modeling. A reliable 3D orebody model must be obtained to ensure resource efficiency and sustainability in the mining industry. In addition, 3D geological modeling has become indispensable in intelligent mining, smart mining, and mining 4.0. In previous years, explicit methods were widely used for 3D geological modeling. However, the validity of geological models produced with these methods has been debated. It has been understood that they are inadequate in modeling vein-type mineralizations with complex geometry in particular. For this reason, implicit modeling …

A Review Study Of The Relationship Between Coal Fly Ash Characteristics And The Presence Of Rare Earth Metals From Steam Power Plants In Indonesia, Muhammad F. Shafiyurrahman, Shofa Rijalul Haq, Nurkhamim Nurkhamim, Ade Kurniawan, Rofa D Bulopa, Rizki Khoiriah Nasution

Journal of Sustainable Mining

The establishment of a coal mining downstream ecosystem focused on a sustainable and environmentally friendly economy is an important goal for many countries. One strategic step in achieving this goal is the utilization of coal fly ash (CFA) waste as a secondary source of rare earth elements (REE). The use of CFA provides a solution to the environmental and health challenges resulting from mining primary sources. Prior to developing REE extraction technology, CFA characterization must be conducted. Therefore, this study addresses the relationship between CFA characteristics and the presence of REE. Based on the ASTM C618-12 standard, CFA in Indonesia …