Digital Commons Network^™

Fundamental Solutions To The Fractional Heat Operator, Jacob Flores

Math Theses

In this thesis, we are interested in showing the existence of a fundamental solution to the fractional heat operator. The fractional heat operator is a nonlocal linear operator used to model the time evolution of anomalous diffusion processes whose applicability arises in a wide variety of fields in the physical sciences, engineering, economics, and finance. Fundamental solutions to a partial differential operator are a class of generalized solutions formulated with rich mathematical analysis grounded in classes of well-behaved smooth functions referred to as test functions and their continuous linear functionals referred to as distributions. A primary tool that we use …

Simulations Of Skyrmions And Merons, Ryan Friesen, Aidan Kirk, Tom Carroll, Xuemei Cheng

Physics and Astronomy Summer Fellows

Skyrmions and merons are particle-like spin structures that are found in specific magnetic materials. Due to their stability and nanoscale size, these quasiparticles have been proposed as promising candidates for qubits in quantum computing applications. Our goal is to design materials that can host and stabilize these quasiparticles. Skyrmions and merons exist only under specific conditions, and the parameter space for these materials is vast. Thus, we use the simulation package MuMax3 to run simulations to test the viability of potential materials to simplify this search. We present on our simulations of these skyrmions and merons. This work was supported …

Plant Diversity Modifies Multi-Trophic Interactions In Croplands, Grasslands And Forests, Nian Feng Wan, Muyao Li, Siyuan Shen, Jun Xiang Zhou, Yu Tong Zhu, Ben A. Woodcock, Yue Qing Hu, Shinichi Nakagawa, David Tilman, Andy Hector, Michel Loreau, Peter B. Reich, Matteo Dainese, Forest Isbell, Bernhard Schmid, Kris A.G. Wyckhuys, Geoff M. Gurr, Linsheng Wan, Nico Eisenhauer, Yann Hautier, Anu Eskelinen, Richard D. Bardgett, Paul Kardol, Lauchlan H. Fraser, Qi Su, Shiyun Qiu, Yavanna Aartsma, Ramon Albajes, Matthias Albrecht

All Peer-Reviewed Publications

Multitrophic interactions can strongly influence the structure and functioning of ecosystems, but how plant diversity influences the direction and predictability of multitrophic interactions across agricultural and natural ecosystems remains unclear. Using 149 field studies across five continents, we found that, on average, increasing plant diversity tended to exert differential top-down and bottom-up effects in croplands versus grasslands and forests. Organic and nonorganic croplands exhibited 846 and 148% higher invertebrate natural enemy-to-herbivore abundance ratios under increased plant diversity, consistent with top-down control patterns where predator gains cause herbivore declines, enhancing crop outcomes. In grasslands and forests, increasing plant diversity was associated …

Oregon State Rank Assessment For Ithuriel's Spear (Triteleia Laxa), Lindsey K. Wise

Institute for Natural Resources Publications

Oregon state conservation status assessment for Ithuriel's spear (Triteleia laxa)
 using NatureServe methodology, 2026.

Vertical Alignment As A Systemic Strategy For Sustaining Workforce-Aligned K–12 Engineering Initiatives: A Collective Case Study Of District-Wide Microelectronics Integration, Greg J. Strimel, Victoria Constantine, Deana Lucas, Emily Haluschak, Yubin Lee, Morgan Hynes, Selcen Guzey, Tamara J. Moore

School of Engineering Technology Faculty Publications

Background

In response to the 2022 CHIPS and Science Act, a K–12 workforce development initiative was launched to embed microelectronics education across US school districts. To promote sustainability, the initiative employed a district-wide vertical alignment strategy that progressively integrates microelectronics content and engineering-related career experiences from kindergarten through high school. While vertical alignment is often used for curriculum planning, its broader potential as a systems-level strategy remains underexplored.

Purpose

This study investigated how vertical alignment functions within a K–12 engineering workforce development initiative, focusing on enablers/barriers toward expanding and sustaining integration efforts. The research questions addressed stakeholder experiences with the …

Pengembangan Media Pembelajaran Mystery Box Berbantuan Papan Jam Materi Sudut Kelas V Sekolah Dasar, Amala Nurlika Putri, Rahmad Setyo Jadmiko, Nourma Oktaviarini

Journal of Innovation and Teacher Professionalism

This study aimed to develop a mystery box learning medium supported by a clock-face board for teaching angles to fifth-grade elementary school students. The study was motivated by the limited use of concrete learning media in mathematics instruction, particularly for angle concepts, which contributed to students’ difficulties in understanding the material and participating actively in classroom activities. This research employed the Research and Development method using the ADDIE model, which consists of analysis, design, development, implementation, and evaluation. The developed product was a mystery box learning medium equipped with a clock-face board and an integrated protractor. The product was validated …

Perancangan Media Pembelajaran Papercraft Minecraft Pada Materi Kemasan Dari Kertas Untuk Seni Budaya Smp, Ruqunia Rahmatuti, Iriaji Iriaji

Journal of Innovation and Teacher Professionalism

Learning Cultural Arts, particularly the topic of paper packaging, requires concrete learning experiences to help students understand the relationship between object shape, dimensions, net structure, and packaging function. However, observations conducted during the teaching assistance program revealed that classroom instruction was still dominated by conventional learning media, causing some students to experience boredom and difficulties during practical activities. This study aims to describe the design process of a Minecraft Papercraft learning medium for teaching paper packaging in junior high school Cultural Arts using the Design Thinking approach. The study employed a qualitative descriptive approach involving 64 seventh-grade students from classes …

Radiation Effects On The Amd Versal Running An Automatic Modulation Classification Model, Allan D. Howe

Theses and Dissertations

With the recent increase of interest into artificial intelligence (AI), graphics processing units (GPUs) have been used as the main hardware architecture for AI computation. Because of their high power consumption and large size, it is necessary to consider other architectures to perform AI computing in outer-space where size, weight, power, and cost (SWaP-C) are tightly constrained. One such architecture is the Advanced Micro Devices (AMD) Versal Adaptive Compute Acceleration Platform (ACAP), which can achieve acceptable AI throughput at a lower power and size compared to a GPU. As the Versal ACAP gets used in space applications, it is necessary …

Glassy Magnetic Freezing Of Interacting Clusters In Materials Related To The Lk-99 Family, Serafim Teknowijoyo, Domenico Napoletani, Vahan Nikoghosyan, Armen Gulian

Mathematics, Physics, and Computer Science Faculty Articles and Research

We report reproducible magnetization anomalies appearing below room temperature in copper-doped apatite materials belonging to the LK-99 family synthesized via hydrothermal methods. These anomalies are observed consistently across samples prepared under comparable conditions. Although the extracted Mydosh parameter lies within the range often associated with vortex-glass behavior in superconductors, a detailed analysis of DC magnetization, AC susceptibility, field dependence, and magnetic memory effects demonstrates that the observed phenomena are not related to superconductivity. Instead, the data are consistent with glassy magnetic freezing of interacting clusters. Compositional and structural analysis identifies covellite (CuS), one of the constituent phases in these multiphase …

Re: Conditional Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites: Ur-46 Remedial Action Work Plan (Rawp), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Conditional Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites: Ur-46 Site Evaluation Summary Report (Sesr), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

2026 July 23 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites: Ur-27 Site Evaluation Summary Report (Sesr), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Conditional Approval Letter For The Draft Final 2024 Unreclaimed Sites Sampling: Ur-21 Site Evaluation Summary Report, Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) 2025 Butte Reclamation Evaluation System (Bres) Field Evaluation Summary Report And Technical Recommendations Proposal, 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 Unreclaimed Sites: Ur-07 Site Evaluation Summary Report (Sesr), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Butte Priority Soils Operable Unit Diggings East Final 100% Remedial Design Package Submittal, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Comparative Analysis Of Strain-To-Velocity Conversion Methods For Active-Source Das Data And Collocated Nodal Stations, Prajwal Panthi, Brady R. Cox

Civil and Environmental Engineering Student Research

Distributed Acoustic Sensing (DAS) provides dense spatial measurements of the dynamic strain along fiber optic cables, offering high-resolution wave sensing for ground motion monitoring and subsurface imaging applications. However, DAS records the axial strain or strain rate, whereas traditional seismic and engineering ground motion equipment and derived metrics are based on particle displacement, velocity, or acceleration, necessitating reliable strain-to-velocity conversion methods. This study evaluates three widely used conversion approaches: the fk-rescaling, curvelet-based conversion, and slant-stack methods. These approaches are applied to a unique high-energy, near-field, active-source dataset collected at the Birds Landing Site in Sherman Island, California. The dataset includes …

Creative Independent Work As A Tool For Professional Skill Development In Students, Zhanna Mussina, Gulnar Kazhikenova, Murshida Nurgaliyeva, Klara Smatova, Bakyt Kuanysheva

Higher Learning Research Communications

Objectives: This study aimed to analyze the implementation and impact of students’ creative independent work in English language lessons at Toraighyrov University in Pavlodar.

Methods: The research employed a combination of qualitative and quantitative methods, including logical analysis, functional analysis, and formal legal approaches, supplemented by deductive and inductive reasoning. The empirical phase involved a pedagogical experiment with two student groups (n = 37) to evaluate the effectiveness of creative independent work methods.

Results: Results demonstrated that incorporating creative independent work significantly enhanced both English language competency and broader professional skills, including critical thinking and autonomous learning capabilities. Students …

``Is That What It Means?'' Performative Storytelling In Early Childhood Education: Meaning-Making Through Interaction, Fathia Anggriani Pradina, Untung Yuwono, Bernadette Kushartanti

Bahasa dan Seni: Jurnal Bahasa, Sastra, Seni, dan Pengajarannya

Early childhood education is inextricably linked to the role of adults in every aspect of its process. In addition to formal classroom learning, storytelling with a storyteller is another activity that involves adults. The dialogic interaction between storyteller and children fosters the creation of meaning. This study examines how storytelling, as an interactional practice, can dynamically construct meaning together between storyteller and children. Sixty-one kindergarten children participated in this study during a one and half hour storytelling activity. The qualitative and interactional approach used in this study focused on moment-to-moment exchanges during the naturally occurring storytelling event. The findings indicate …

Exposing The Wizard Of Oz: Transparency And Testing Of Artificial Intelligence Systems, Henry H. Perritt

Journal of Science & Technology Law

The press and media, elected officials, some high-tech entrepreneurs, and a new breed of “ethicists” are calling loudly for governments to regulate artificial intelligence (“AI”), especially generative AI, popularized by ChatGPT and Google Gemini. Much of the clamor is ill-informed about the technology and based on exaggerated concerns about its risks. Nevertheless, the pressure for regulation is real and is already evoking governmental responses. Transparency requirements are far better than command-and-control regulation. The technology is far too new, however, for any form of command-and-control regulation. Would-be regulators need to take a deep breath and sit back for a while to …

Quantum Leap In The Legal Paradigm, Katri Nousiainen, Joonas Keski-Rahkonen

Journal of Science & Technology Law

No abstract provided.

Development Of Computational Imaging Pipelines To Advance Virtual Pet Imaging Trials, Suya Li

McKelvey School of Engineering Graduate Student Theses & Dissertations

Positron emission tomography (PET) provides functional information that is essential for disease diagnosis, treatment assessment, and biomedical research. However, the development and validation of PET imaging methods often require simulated imaging data with known ground truth, as well as large clinical datasets that are realistic and scalable. These requirements are difficult to satisfy using clinical studies alone, motivating the development of virtual PET imaging techniques. Physics-based simulation can model PET acquisition with high accuracy, but its computational cost limits its large-scale usage. Meanwhile, conventional digital phantom-based image generation approaches often lack the anatomical diversity and heterogeneous tracer uptake patterns observed …

Talking Teaching For Change: How Productive Teacher Collaborations Contribute To Teacher Efficacy Beliefs And Student Achievement Gains, Xiaohang Zhang

Theses and Dissertations

Teacher collaboration and teacher efficacy beliefs are complex, multifaceted constructs that play critical roles in student learning and influence one another in multiple ways. School collaborative culture, including collegial trust, collective learning, and shared responsibility, has also been identified as an important factor shaping both effective teacher collaboration and teacher efficacy beliefs. This study employed a sequential explanatory mixed-methods design to (a) examine the relationships between features of collaborative discourse and teachers' instructional efficacy beliefs, as well as the extent to which school type and school collaborative culture influence these relationships, and (b) explore how these collaborative discourse features are …

Using A Cell Flux Model To Investigate Phytoplankton Growth And Macromolecular Allocation Under Iron Limitation, Margaret Bernish, Meng Gao, Jongsun Kim, Benoit Pasquier

School of Earth, Environmental, & Marine Sciences Faculty Publications

Global biogeochemical models are powerful tools used to interpret observations and empirical data, create hypotheses, and make predictions. Many of these models, however, represent marine microbes as static stoichiometric reactions that convert nutrients into biomass. To better constrain the biological processes that control nutrient cycling in the global ocean, we extend the Cell Flux Model of Phytoplankton to explore the impact of dissolved iron concentration on the allocation of macromolecules and elemental ratios within phytoplankton cells. This model is supported by data obtained from a range of incubation experiments conducted with phytoplankton of varying species and size categories. Model output …

Editorial: Participatory And Just Governance: Empowering Local And Indigenous Communities, Melissa Haeffner, Maiko Sakamoto, Jenia Mukherjee, Hong Quan Nguyen, Soyo Takahashi

Environmental Science and Management Faculty Publications and Presentations

The papers in this Research Topic (RT) extend insights on the roles of social relations, institutional arrangements, Indigenous ways of knowing, local knowledge, and decisionmaking participation in shaping water governance and practice. Despite efforts to predict flows and possible hazards, we continue to observe “unintended consequences” when humans interact with waterscapes. What we often learn, we argue, is that what appears “unintended” often reflects a deliberate architecture of exclusion; one that becomes legible only when social power relations are placed at the center of analysis alongside hydrological variables. Doing so may illuminate where injustice complicates intentions and what difference participatory …

Developing A Natural Language Interface For Knowledge Graphs, Ruth Assefa, Sarah Mendoza, Luke Voinov, Oyku Serap Ogut, Nurcan Yuruk

SMU Journal of Undergraduate Research

This paper proposes to solve the challenge of making databases more user-friendly by interfacing them with OpenAI's ChatGPT-3.5 model. We implemented this solution to assist researchers in easily finding others with similar research interests. Our study involves 184 researchers from 14 departments at Southern Methodist University (SMU). We collected researchers' areas of expertise and biographies and stored them in a Neo4j graph database. We used OpenAI's embedding models to create vector representations of the collected data, allowing for accurate similarity assessments via Neo4j's built-in algorithms. By integrating this system with LangChain, we enabled natural language queries. The results demonstrated high …

Stylometric And Formal Patterns In The Scholarly Impact Of Scientific Literature, Joshua Ange, Eric Godat, Rajani Sudan

SMU Journal of Undergraduate Research

Scientific communication is typically tied to promoting public engagement and interest in science, increasing scientific literacy, and playing an essential role in policymaking. The success of public communication of scientific findings is largely associated with secondary characteristics of research (e.g. the style of writing and presentation), rather than the primary content or research quality. But it is unclear to what extent the success of scientific literature intended for working scientists is influenced by those same secondary characteristics. Does the writing style of scientific articles impact their success in academic spheres? In this study, we explore the stylometric and formal characteristics …

Framing Ecclesiastical Issues As Identity Questions: A Comparative Analysis Of Digital Media In North Macedonia And Montenegro, Martin Protogjer

Occasional Papers on Religion in Eastern Europe

This article examines how digital media frame ecclesiastical issues as identity questions in North Macedonia and Montenegro. The analysis compares two distinct but structurally related cases: the media reception of the recognition and normalization of the status of the Macedonian Orthodox Church – Ohrid Archbishopric in North Macedonia in 2022, and the media reception of the Law on Freedom of Religion and the church processions associated with the Serbian Orthodox Church in Montenegro in 2020. The study employs qualitative content analysis with a framing approach, based on two purposively selected digital media corpora consisting of 20 media texts from North …

Solvable Diagrams And Equations Over Groups, Andrew Clifford, Paul Cummings

University of Tennessee Mathematical Journal

Given a presentation $\mathcal{P}=\langle X|R\rangle $ of the group $G$ and an equation $e\in G*\langle t \rangle$, we define a solution to a van Kampen diagram over the presentation  $\mathcal{P}_e=\langle X\cup\{t\}|R\cup\{e\}\rangle$. We prove that $e$ is solvable over $G$ exactly when every diagram over $\mathcal{P}_e$ has a solution.