Digital Commons Network^™

The Nature Of Optical Afterglows Without Gamma-Ray Bursts: Identification Of At2023lcr And Multiwavelength Modeling, Maggie L. Li, Anna Y.Q. Ho, Geoffrey Ryan, Daniel A. Perley, Gavin P. Lamb, A. J. Nayana, Igor Andreoni, G. C. Anupama, Eric C. Bellm, Edo Berger, Joshua S. Bloom, Eric Burns, Ilaria Caiazzo, Poonam Chandra, Michael W. Coughlin, Kareem El-Badry, Matthew J. Graham, Mansi Kasliwal, Garrett K. Keating, S. R. Kulkarni, Harsh Kumar, Frank J. Masci, Richard A. Perley, Josiah Purdum, Ramprasad Rao, Antonio C. Rodriguez, Ben Rusholme, Nikhil Sarin, Jesper Sollerman, Gokul P. Srinivasaragavan, Vishwajeet Swain, Zachary Vanderbosch

Faculty Publications

In the past few years, the improved sensitivity and cadence of wide-field optical surveys have enabled the discovery of several afterglows without associated detected gamma-ray bursts (GRBs). We present the identification, observations, and multiwavelength modeling of a recent such afterglow (AT 2023lcr), and model three literature events (AT 2020blt, AT 2021any, and AT 2021lfa) in a consistent fashion. For each event, we consider the following possibilities as to why a GRB was not observed: (1) the jet was off-axis; (2) the jet had a low initial Lorentz factor; and (3) the afterglow was the result of an on-axis classical GRB …

Integrating Community Assets, Place-Based Learning, And Career Development Through Project-Based Learning In Rural Settings, Denae Kizys, Christine Lotter Ph.D., Lucas Perez, Rachel Gilreath, Dodie Limberg

Faculty Publications

Our study investigates the first year of a two-year place-based education (PBE) professional development model that focuses on career development in rural middle schools through project-based learning (PBL) units. Rural science, technology, engineering, and mathematics (STEM) educators face unique challenges, including geographic isolation, limited resources, and reduced access to professional development opportunities, which can hinder the effective integration of career-oriented learning in the classroom. We addressed these challenges by implementing professional development in which school counselors and teachers collaborate to design PBL units aligned with rural community local needs and STEM careers. Using a descriptive multiple-case study methodology to document …

Gendered Expectations: Do Voters Reward Women For Supporting Women's Interests?, Nichole M. Bauer, Anna Gunderson, Jeong Hyun Kim, Elizabeth Lane, Belinda Davis, Kathleen Searles

Faculty Publications

Are women legislators punished for not supporting women's substantive policy interests? We test these gendered expectations. We marshal an original content analysis of cable news coverage and two survey experiments testing voters' assessment of hypothetical legislators on the issues of abortion and equal pay. We find that voters rate both women and men legislators positively for supporting women's issues and negatively evaluate legislators of both genders when they do not support women's interests. We also find that women voters negatively evaluate women legislators who act against women's interests at a greater rate than men voters. While we do not find …

Extreme Bandgap Polarization Doped Algan Layers On Bulk Aln For Pn-Diodes With An 8.5 Mv Cm−1 Breakdown Field And Forward Current Density Exceeding 20 Ka Cm−2, Tariq Jamil, Abdullah Al Mamun Mazumder, Muhammad Ali, Mafruda Rahman, Kenneth Stephenson, Grigory Simin, Asif Khan

Faculty Publications

In this paper we present a study of distribution polarization doped Al_xGa_1−xN layers and their use in quasi-vertical configuration pn-diodes which exhibited a high breakdown field of ∼8.5 MV cm⁻¹ and a large forward current density (∼23 kA cm⁻²). We also establish their potential use in UVC light emitters by studying the optical emission from a quantum well inserted at the distribution polarization doped pn-junction interface.

Generative Ai For Thematic Analysis In A Maternal Health Study: Coding Semistructured Interviews Using Large Language Models, Shan Qiao, Xingyu Fang, Junbo Wang, Ran Zhang, Xiaoming Li, Yuhao Kang

Faculty Publications

Study Objectives: The coding of semistructured interview transcripts is a critical step for thematic analysis of qualitative data. However, the coding process is often labor-intensive and time-consuming. The emergence of generative artificial intelligence (GenAI) presents new opportunities to enhance the efficiency of qualitative coding. This study proposed a computational pipeline using GenAI to automatically extract themes from interview transcripts. Methods: Using transcripts from interviews conducted with maternity care providers in South Carolina, we leveraged ChatGPT for inductive coding to generate codes from interview transcripts without a predetermined coding scheme. Structured prompts were designed to instruct ChatGPT to generate and summarize …

Using T-Sne For Characterizing Glitches In Ligo Detectors, Tabata Aira Ferreira, Gabriela González

Faculty Publications

Glitches are non-Gaussian noise transients originating from environmental and instrumental sources that contaminate data from gravitational wave detectors. Some glitches can even mimic gravitational wave signals from compact object mergers, which are the primary targets of terrestrial observatories. In this study, we present a method to analyze noise transients from the Laser Interferometer Gravitational-Wave Observatory observatories using Q-transform information combined with t-distributed stochastic neighbor embedding. We implement classification techniques, examine the influence of parameters on glitch classification, and conduct a week-long daily analysis to track outlier transients over time.

Impact Of Prior Exposures On Biomarkers Of Blast During Military Tactical Training, Zhaoyu Wang, Shengnan Sun, Alis Aksar Kranfli, Jeffrey Nemes, Molly J. Sullan, Andrew J. Hoisington, Lisa A. Brenner, Miciej Skotak, Christina R. Lavalle, Yongchao Ge, Walter Carr, Fatemah Haghighi

Faculty Publications

Blast injuries and subclinical effects are of significant concern among those Service Members (SMs) participating in military operations and tactical trainings. Studies of SMs repeatedly exposed during training find concussion-like symptomology with transient decrements in neurocognitive performance, and alterations in blood biomarkers. How prior mild TBI (mTBI) history interacts with low-level blast (LLB) exposure, however, remains unexplored, which we investigate in the present study, to identify interindividual biomarker changes from LLB exposures influenced by prior history of mTBI.

Pulse Pressure, White Matter Hyperintensities, Andcognition: Mediating Effects Across The Adult Lifespan, Jade Hannan, Sarah Newman-Norlund, Natalie Busby, Sarah C. Wilson, Roger Newman-Norlund, Chris Rorden, Julius Fridriksson, Leonardo Bon, Nicholas Riccardi

Faculty Publications

Objectives: To investigate whether pulse pressure or mean arterial pressure mediates the relationship between age and white matter hyperintensity load and to examine the mediating effect of white matter hyperintensities on cognition.

Methods: Demographic information, blood pressure, current medication lists, and Montreal Cognitive Assessment scores for231 stroke- and dementia-free adults were retrospectively obtained from the Aging Brain Cohort study. Total WMH load was determined from T2-FLAIR magnetic resonance scans using the TrUE-Net deep learning tool for white matter segmentation. In separate models, we used mediation analysis to assess whether pulse pressure or MAP mediates the relationship between age and total …

Pulse Pressure, White Matter Hyperintensities, And Cognition: Mediating Effects Across The Adult Lifespan, Jade Hannan, Sarah Newman-Norlund, Natalie Busby, Sarah C. Wilson, Roger Newman-Norlund, Chris Rorden, Julius Fridriksson Ph.D., Leonardo Bonilha

Faculty Publications

Objectives: To investigate whether pulse pressure or mean arterial pressure mediates the relationship between age and white matter hyperintensity load and to examine the mediating effect of white matter hyperintensities on cognition.

Methods: Demographic information, blood pressure, current medication lists, and Montreal Cognitive Assessment scores for231 stroke- and dementia-free adults were retrospectively obtained from the Aging Brain Cohort study. Total WMH load was determined from T2-FLAIR magnetic resonance scans using the TrUE-Net deep learning tool for white matter segmentation. In separate models, we used mediation analysis to assess whether pulse pressure or MAP mediates the relationship between age and total …

Mitigating Polarization Leakage In Gas Pixel Detectors Through Hybrid Machine Learning And Analytic Event Reconstruction, Nicoló Cibrario, Michela Negro, Raffaella Bonino, Nikita Moriakov, Luca Baldini, Niccoló Di Lalla, Alessandro Di Marco, Sergio Fabiani, Andrea Frassá, Alessio Gorgi, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, Fabio Muleri, Nicola Omodei, John Rankin, Carmelo Sgró, Stefano Silvestri, Paolo Soffitta, Stefano Tugliani

Faculty Publications

Spatially resolved polarization measurements of extended X-ray sources are expanding our understanding of the emission mechanisms and magnetic field properties involved. Such measurements have been possible in the past few years thanks to the Imaging X-ray Polarimetry Explorer (IXPE). However, the analysis of extended sources suffers a systematic effect known as polarization leakage, which artificially affects the measured polarization signal. To address this issue, we built a hybrid reconstruction algorithm, which combines machine learning and analytic techniques to improve the reconstruction of photoelectron tracks in the Gas Pixel Detector and to significantly mitigate polarization leakage. This work presents the first …

Untethered Isoperimetric Robotic Truss For Lunar Applications, Mihai Stanciu, Spencer Stowell, Isaac Weaver, Adam Rose, Chris Paul, James Wade, Ashleigh Cerven, Annie O'Bryan, Brian Bodily, Logan Yang, Nathan Usevitch

Faculty Publications

We introduce a robotic system designed to function as a lightweight, modular, and reconfigurable structure on the Moon. This robust system consists of truss-like robotic triangles, each formed by a continuous inflated fabric tube routed through two robotic roller units and a connecting unit. When deflated, these triangles can be compacted to roughly the volume of the roller units, offering an advantageous stowed-to-deployed volume ratio of 1 to 6.24. Upon inflation, the roller units pinch the tubes, creating corners by reducing the bending stiffness of the tube. Once fully deployed, electric motors move the robotic roller units along the tube, …

Linking Geographic Distribution And Niche Through Estimation Of Niche Density, Tad Dallas, Cleber Ten Caten

Faculty Publications

1. The availability of suitable niche space constrains where species can occur geographically. This tie between niche space and geographic space is crucial when estimating species geographic distributions in a changing climate. However, specific combinations of climatic conditions may be overrepresented in geographic space, highlighting the potential disconnect between climatic niche area and geographic range size.
2. We develop a niche density estimator that accounts for the geographic availability of climatic niche space, relate this to traditional estimates of niche area and explore how these niche estimates are related to species geographic range size.
3. To do this, we use data on over …

“Let Me Be A Bridge”: Language Brokering Among Emerging Adult Latina Professionals In The Midwest, Elise M. Dubord

Faculty Publications

In immigrant families, bilingual children and adolescents regularly act as translators and interpreters for family and community members who are not fluent in the dominant language. These childhood language brokers later shift the focus of their translation activities as they transition into adulthood and develop professional skills. This research explores narratives of language brokering trajectories of three bilingual Latinas who were emerging adult professionals in three cities in Iowa. Based on a series of interviews collected over a 15 month period, this analysis examines how participants described realigning their family language responsibilities while simultaneously transferring their language brokering skills to …

Appendices A & B: Supporting Faculty Parents In Professional Development: Case Studies, Recommendations, And A Call For Inclusive Approaches, Anne Marie Gruber, Lindsay Doukopoulos

Faculty Publications

No abstract provided.

Podcasts In Mental, Physical, Or Combined Health Interventions For Adults: Scoping Review, Elizabeth M. Dascombe, Philip J. Morgan, Ryan J. Drew, Casey P. Regan, Gabrielle Turner-Mcgrievy, Myles D. Young

Faculty Publications

Background:

The increasing prevalence of poor mental and physical health in adults is a global health concern. Given the scope of this problem, scalable and effective treatment interventions are needed. While podcasts (online digital audio files) are becoming more popular, the extent of podcast use in mental, physical, or combined health interventions has not been reviewed.

Objective:

This scoping review primarily aims to summarize the available evidence regarding the use of podcasts in health promotion interventions. A series of 5 research questions was designed to systematically review and accurately represent podcast use in current research interventions.

Methods:

We conducted a …

Camouflaging Depression, Seth Brown

Faculty Publications

Many individuals with depression have been observed to exert effort to appear non-depressed. This effort, referred to as camouflaging, has been systematically studied among individuals with autism spectrum disorder and attention deficit hyperactivity disorder, but not among individuals with more common disorders such as depression. The purpose of this research was to examine camouflaging amongst individuals with depression and develop a camouflaging instrument specifically for depression. The Camouflaging Depression Scale (CDS) was developed and administered to 292 individuals experiencing varying levels of depression along with other clinical measures. In this sample, engagement in camouflaging was common and similarly occurred among …

“I Know What’S Best For My Child”: A Qualitativeanalysis Of Us Cisgender-Heterosexual Andlgbtq Parents’ Perspectives On Inclusiveeducation Policies, Flora Blanchette-Oswald, Izilda Pereira-Jorge, Alexandra Garr-Schultz, Kimberly E. Chaney

Faculty Publications

Diversity education in the K-12 years is a contentious issue in the contemporary US context. Given evidence that parental identity influences beliefs about and support for diversity education, we qualitatively explored cisgender-heterosexual and LGBTQ+ parents’ (N = 609) beliefs about the appropriateness of inclusive educational policies in K-12 classrooms. We collected qualitative data on parental perceptions of inclusive signals in classrooms (e.g., displaying a rainbow flag) and on perceptions of inclusive curriculum (whether children should learn about diversity at school/from teachers or at home/from parents). Parents’ responses reflected variability in support for inclusive signals. Cisgender-heterosexual parents were more likely …

Cardiovascular Health In The Transition From Adolescence To Emerging Adulthood: A Scientific Statement From The American Heart Association, Jewel Scott Phd, Rn, Fnp-C, Anandita Agarwala, Carissa M. Baker-Smith, Matthew J. Feinstein, Karen Jakubowski, Jill Kaar, Niyati Parekh, Kershaw V. Patel, Janna Stephens

Faculty Publications

Cardiovascular disease remains a leading cause of death in the United States, with an alarming rise in the proportion of young adults experiencing cardiovascular events. Many adolescents enter adulthood with significant cardiovascular disease risk factors. This scientific statement addresses the critical need for cardiovascular health promotion during emerging adulthood, a transitional stage between the ages of 18 and 25 or 29 years of age. We discuss the significance of social determinants of health and the interplay between individual-level risk factors and developmental changes, including shifts in substance use, social connections, and emotional well-being. We conclude by outlining strategies for optimizing …

Nonnative Species Richness And Dominance Reveal Differing Support For Invasion Theory At A Continental Extent, Lily M. Thompson, William K. Annis, Stephen R. Midway, Julian D. Olden, Brandon K. Peoples

Faculty Publications

Aim: Empirical tests of conceptual hypotheses describing species invasions often differ depending on the spatial scale (spatial resolution and extent of study area) at which they were conducted. Some of this disparity may arise from tradeoffs in data quality necessitating the use of different indices of community invadedness among scales. Local-scale studies typically use fine-resolution, descriptive measures of community invadedness (‘dominance’, the proportion nonnative individuals) at limited spatial extents, while macroscale studies often aggregate datasets to cover large spatial extents but use coarser spatial resolution and less descriptive indices (nonnative species richness). We investigated the consequences of using different indices …

Reef Fish Movement And Community Assemblages Associated With A Newly Deployed Artificial Reef, Jade M. Carver, Brett J. Falterman, Stephen R. Midway, Christian Walker, Creed C. Branham, Michael A. Dance

Faculty Publications

Artificial reefs provide critical habitat for fish in areas lacking benthic structure, yet our understanding of how artificial reefs function and develop is limited. Here, changes in fish community assemblages were monitored using baited remote underwater video (BRUV) surveys before and after a new artificial reef was deployed in the northern Gulf of Mexico. Movement of red snapper (Lutjanus campechanus) and gray snapper (Lutjanus griseus) between nearby oil and gas platforms (n = 3) and the new artificial reef was examined using acoustic telemetry, and residency was calculated for fish associated with both structure types. Fish community development at the …

Incorporating Media Coverage And The Impact Of Geopolitical Events For Stock Market Predictions With Machine Learning, Vinayaka Gude, Daniel Hsiao

Faculty Publications

This paper explores the impact of the Israel–Palestine conflict on the stock performance of U.S. companies and their public positions on the conflict. In an era where corporate positions on geopolitical issues are increasingly scrutinized, understanding the market implications of such statements is critical. This research aims to capture the complex, non-linear relationships between corporate actions, media coverage, and financial outcomes by integrating traditional statistical techniques with advanced machine learning models. To achieve this, we constructed a novel dataset combining public corporate announcements, media sentiment (including headline and article body tone), and philanthropic activities. Using both classification and regression models, …

How I Learned To Stop Worrying And Love The Bot: What I Learned About Ai And What You Can Too, John Lande

Faculty Publications

Artificial intelligence (AI) tools play an increasingly prominent role in legal education, legal practice, and dispute resolution. People’s understanding of how these tools work varies widely. This article outlines a framework to improve AI literacy among dispute resolution practitioners, parties, ADR program managers, faculty, students, and scholars. It highlights emerging trends and offers practical suggestions and resources to support AI literacy and the responsible integration of AI into their work. A companion article, Getting the Most from AI Tools: A Practical Guide to Writing Effective Prompts, helps users, especially those in dispute resolution roles, learn how to write effective …

The Essence Of An Antitrust Violation, Thomas A. Lambert

Faculty Publications

Judicial embrace of the consumer welfare standard reduced the indeterminacy and political manipulability of U.S. antitrust law. Continual invocations of antitrust’s consumer welfare focus, however, have created the misimpression that consumer harm is a sufficient, not merely a necessary, condition for condemning antitrust-relevant behaviors like agreements in restraint of trade and exclusion-causing unilateral acts. Such a “consumer harm sufficiency” view underlay the plaintiffs’ claims in Epic Games v. Apple and FTC v. Qualcomm and has inspired scholarly proposals to condemn various antitrust-relevant behaviors simply because they occasion consumer harm.

Antitrust economics and dynamic efficiency considerations call for rejection of the …

Direct Evidence For R-Process Nucleosynthesis In Delayed Mev Emission From The Sgr 1806-20 Magnetar Giant Flare, Anirudh Patel, Brian D. Metzger, Jakub Cehula, Eric Burns, Jared A. Goldberg, Todd A. Thompson

Faculty Publications

The origin of heavy elements synthesized through the rapid neutron capture process (r-process) has been an enduring mystery for over half a century. J. Cehula et al. recently showed that magnetar giant flares, among the brightest transients ever observed, can shock heat and eject neutron star crustal material at high velocity, achieving the requisite conditions for an r-process. A. Patel et al. confirmed an r-process in these ejecta using detailed nucleosynthesis calculations. Radioactive decay of the freshly synthesized nuclei releases a forest of gamma-ray lines, Doppler broadened by the high ejecta velocities v ≳ 0.1c into a quasi-continuous spectrum peaking …

Shielding Resources For Four Common Radiopharmaceuticals Utilized For Imaging And Therapy: Tc-99m, F-18, I-131, And Lu-177, Michael Oumano, Richard Wendt, James Botti, Nathan Busse, David Hintenlang, Stephanie Leon, Kevin Little, Melissa Martin, Richard Massoth, Kenneth Matthews, Rameshwar Prasad, Sharon White, Jessica Clements

Faculty Publications

Introduction: The use of radioactive materials in the United States has been tightly regulated by the Nuclear Regulatory Commission and other entities for many decades. In 2015, however, the Joint Commission began to require hospital-based nuclear medicine departments to conduct shielding designs and evaluations for radioactive material areas, mirroring established x-ray practices. NCRP Report No. 147 guides diagnostic medical x-ray shielding, but obviously cannot be used alone for nuclear medicine applications. The rising demand for theranostic nuclear medicine shielding evaluations particularly necessitates updated focused guidance, the aim of this report. Methods: Monte Carlo simulations were conducted using GATE software to …

Whole-Genome Assembly And Annotation Of The Firecracker Penstemon (Penstemon Eatonii), David E. Jarvis, Mikel R. Stevens, Payton Carter, Ying Fei Lin, Kate E. Jaggi, Gabriela Jijon, Teal Kalt, Jouber Calixto, Samantha Standring, Kaitlin Torres, Kayla B. Stephensen, Hayley Mangelson, Noah H. Williams, Carolyn A. Wessinger, Peter J. Maughan, Paul B. Frandsen

Faculty Publications

The penstemons are ornamental annual flowering plants native to the Intermountain West and Rocky Mountains and commonly used for urban landscaping. Elite commercial penstemons are generally susceptible to abiotic stresses, including drought, root rot, cold, and high salinity. Firecracker penstemon (Penstemon eatonii), however, is much more tolerant to these stresses than most elite cultivars. Importantly, firecracker penstemon has been reported to hybridize with many other penstemons and therefore provides the opportunity to develop more tolerant elite cultivars through strategic crossing. To facilitate the study and utilization of firecracker penstemon, we sequenced and annotated the genome of a P. …

“William Clark’S Treaties With Indian Nations: An Overview.”, Jay H. Buckley

Faculty Publications

Born the ninth of ten children to John and Ann (Rogers) Clark on August 1, 1770, on a plantation in Caroline County, Virginia, William Clark led a full life as a soldier, explorer, Indian agent, Missouri territorial governor, and superintendent of Indian affairs at St. Louis. While a teenager, his family relocated to a new plantation called “Mulberry Hill” near present-day Louisville, Kentucky. Clark joined the Kentucky militia, and then in 1792 President George Washington commissioned Clark a lieutenant of infantry. During General Anthony Wayne’s Ohio River Indian campaigns, Clark fought at the Battle of Fallen Timbers. He resigned his …

Editorial Introduction: Bridging Policy Theory And Practice In Uncertain Times, Geoboo Song, Saba Siddiki, Holly L. Peterson, Melissa K. Merry, Ben Galloway, Camille Gilmore, Travis Wagher, Annette Nyoni

Faculty Publications

No abstract provided.

Teaching Critically In Contentious Times Black Consciousness, Historical Knowledge, And Educational Policy, Lagarrett J. King, Daniella Cook Sumpter

Faculty Publications

Editors’ Introduction to Special Section of Critical Education: Teaching Critically in Contentious Times

Association Of Nucleoside Reverse Transcriptase Inhibitor Use With Reduced Risk Of Alzheimer's Disease Risk, Joseph Magagnoli Ph.D., Ms, Meenakshi Ambati, Tammy H. Cummings, Joseph Nguyen, Claire C. Thomas, Vidya L. Ambati, S. Scott Sutton, Bradley D. Gelfand, Jayakrishna Ambati

Faculty Publications

INTRODUCTION

Inflammasome activation is implicated in Alzheimer's disease (AD). We previously demonstrated that nucleoside reverse transcriptase inhibitors (NRTIs), drugs approved to treat human immunodeficiency virus (HIV) and hepatitis B, also inhibit inflammasome activation.

METHODS

We evaluated the association between NRTI exposure and subsequent development of AD in the United States Veterans Health Administration over a 24-year period and in the MarketScan database over a 14-year period using propensity score-matched multivariate Cox hazards regression and Kaplan–Meier analyses.

RESULTS

We report that in humans, NRTI exposure was associated with a significantly lower incidence of AD in two of the largest health insurance …