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A New Transition Metal Borate, Co6(B24O39(Oh)6(H2O) 6·2.21h2O, Synthesized Via A Mild Hydrothermal Synthesis, Alevtina Maksimova, Patrick Belt, Nilah Whitfield, Mark D. Smith, Gopabandhu Panigrahi, Gregory Morrison, Hans Conrad Zur Loye May 2025

A New Transition Metal Borate, Co6(B24O39(Oh)6(H2O) 6·2.21h2O, Synthesized Via A Mild Hydrothermal Synthesis, Alevtina Maksimova, Patrick Belt, Nilah Whitfield, Mark D. Smith, Gopabandhu Panigrahi, Gregory Morrison, Hans Conrad Zur Loye

Faculty Publications

A new transition metal borate hydrate, Co6B24O39(OH)6(H2O)6·2.21H2O, was synthesized via a mild hydrothermal method using boric acid as the melt. The compound crystallizes in the trigonal space group P 3‾ with lattice parameters a = b = 13.17840(10) Å, c = 12.3287(2) Å, and a unit cell volume of 1854.27(4) Å3 (Z = 2). This borate hydrate crystallizes in a new structure type comprised of layers containing [BO3] trigonal planar units and [BO4] tetrahedra that are linked by CoO6 and Co(OH)2(H2O)4 octahedra via corner-sharing. The …


Jwst Reveals The Diversity Of Nuclear Obscuring Dust In Nearby Agn: Nuclear Isolation Of Miri/Mrs Data Cubes And Continuum Spectral Fitting, Omaira González-Martín, Daniel J. Díaz-González, Mariela Martínez-Paredes, Almudena Alonso-Herrero, Enrique López-Rodríguez, Begoña García-Lorenzo, Cristina Ramos Almeida, Ismael García-Bernete, Donaji Esparza-Arredondo, Sebastian F. Hoenig, Santiago García-Burillo, Chris Packham, Nancy A. Levenson, Alvaro Labiano, Miguel Pereira-Santaella, Francoise Combes, Anelise Audibert, Erin K.S. Hicks, Lulu Zhang, Enrica Bellocchi, Richard I. Davies, Laura Hermosa Muñoz, Masatoshi Imanishi, Claudio Ricci, Marko Stalevski May 2025

Jwst Reveals The Diversity Of Nuclear Obscuring Dust In Nearby Agn: Nuclear Isolation Of Miri/Mrs Data Cubes And Continuum Spectral Fitting, Omaira González-Martín, Daniel J. Díaz-González, Mariela Martínez-Paredes, Almudena Alonso-Herrero, Enrique López-Rodríguez, Begoña García-Lorenzo, Cristina Ramos Almeida, Ismael García-Bernete, Donaji Esparza-Arredondo, Sebastian F. Hoenig, Santiago García-Burillo, Chris Packham, Nancy A. Levenson, Alvaro Labiano, Miguel Pereira-Santaella, Francoise Combes, Anelise Audibert, Erin K.S. Hicks, Lulu Zhang, Enrica Bellocchi, Richard I. Davies, Laura Hermosa Muñoz, Masatoshi Imanishi, Claudio Ricci, Marko Stalevski

Faculty Publications

We investigate the capabilities of the mid-infrared instrument (MIRI) of JWST to advance our knowledge of active galactic nucleus (AGN) dust using the spectral fitting technique on an AGN collection of 21 nearby (z < 0.05) AGN (7 type-1 and 14 type-2) observations obtained with the medium resolution spectroscopy (MRS) mode. This collection includes publicly available AGN and data from the collaboration of Galactic Activity, Torus, and Outflow Survey (GATOS). We developed a tool named MRSPSFisol that decomposes MRS cubes into point-like and extended contributions. We found statistically good fits for 12 targets with current AGN dust models. The model that provides good fits (χ2/dof< 2) for these 12 targets assumes a combination of clumpy and smooth distribution of dust in a flare-disc geometry where the dust grain size is a free parameter. Still, two and one AGN statistically prefer the disc + wind and the classical clumpy torus model, respectively. However, the currently available models fail to reproduce 40 per cent of the targets, likely due to the extreme silicate features not well reproduced by the models and signatures of water-ice and aliphatic hydrocarbon absorption features in most targets. New models exploring, for instance, new chemistry, are needed to explain the complexity of AGN dust continuum emission observed by JWST.


Global Sporadic-E Prediction And Climatology Using Deep Learning, J. A. Ellis, Daniel J. Emmons, M. B. Cohen May 2025

Global Sporadic-E Prediction And Climatology Using Deep Learning, J. A. Ellis, Daniel J. Emmons, M. B. Cohen

Faculty Publications

Sporadic-E (Es) is an ionospheric phenomenon defined by strong layers of plasma which may interfere with radio wave propagation. In this work, we develop deep learning models to improve the understanding of Es, including the presence, intensity and height of the layers. We developed three separate models. The first, building off earlier work in (J. A. Ellis et al., 2024, link in AFIT Scholar, 10.1029/2023sw003669), includes only the main features from radio occultation (RO) measurements. The second adds to that time, date, location, geomagnetic and solar indices, solar winds, x-ray flux, weather and lightning. A …


Clarifying Parens Patriae, James G. Dwyer May 2025

Clarifying Parens Patriae, James G. Dwyer

Faculty Publications

Throughout the Anglo-American legal world, the state claims an authority, termed parens patriae, to exert control over the lives of nonautonomous persons in ways it does not presume to control autonomous persons. Philosophers have given little attention to when and how that authority should be exercised, yet there is disagreement or confusion about this among courts and legal scholars. This article examines how parens patriae differs from other government roles, identifies which conceptions of the parens patriae role are coherent, and then presents a normative case for adopting a conception of the role as that of fiduciary for nonautonomous …


Towards Human Modeling For Human-Robot Collaboration And Digital Twins In Industrial Environments: Research Status, Prospects, And Challenges, Guoyi Xia, Zied Gharairi, Thorsten Wuest, Karl Hribernik, Aaron Heuermann, Furui Liu, Hui Liu, Klaus-Dieter Thoben Apr 2025

Towards Human Modeling For Human-Robot Collaboration And Digital Twins In Industrial Environments: Research Status, Prospects, And Challenges, Guoyi Xia, Zied Gharairi, Thorsten Wuest, Karl Hribernik, Aaron Heuermann, Furui Liu, Hui Liu, Klaus-Dieter Thoben

Faculty Publications

Human-Robot Collaboration (HRC) and Digital Twins (DT) have significantly advanced industrial development and digital transformation. Human representations and models are essential in Industry 5.0, where human-centric is one of the key features. Despite the growing interest in human models for HRC and DT, a comprehensive overview of these models and enabling technologies currently needs to be provided. This paper aims to present the research status, prospects, applications, and challenges of human modeling for HRC and DT in industrial environments. This paper adopts a Systematic Literature Review (SLR) approach. Moreover, a framework is proposed to systematize human modeling aspects, the technologies …


‘I Feel Like The Most Important Thing Is To Ensure That Women Feel Included…’: Immigrant Women’S Experiences Of Integration And Gender Equality In Iceland During Times Of Crisis, Marya Rozanova-Smith, Embla Eir Oddsdóttir, Andrey N. Petrov Apr 2025

‘I Feel Like The Most Important Thing Is To Ensure That Women Feel Included…’: Immigrant Women’S Experiences Of Integration And Gender Equality In Iceland During Times Of Crisis, Marya Rozanova-Smith, Embla Eir Oddsdóttir, Andrey N. Petrov

Faculty Publications

Enabling gender equality by empowering women to fully engage in modern society is fundamental for building resilient and sustainable communities. While Iceland is recognized as a global leader in gender equality, the experiences of various immigrant groups can differ considerably, especially during crises such as the COVID-19 pandemic and recovery. Given the rapid increase in the immigrant population in Iceland, it is crucial to gain a deeper understanding of the processes surrounding immigrant women’s integration strategies, with an emphasis on gender equality through the lens of intersectionality. The main objective of this qualitative study is to explore the gendered impacts …


Academic And Cerebrovascular Outcomes After Neurodevelopmental Screening In Sickle Cell Disease: A Longitudinal Cohort Study, Sarah E. Bills, Jeffrey Schatz, Elizabeth Gillooly, Julia D. Johnston, A. Lauren Waters, Alyssa M. Schlenz Apr 2025

Academic And Cerebrovascular Outcomes After Neurodevelopmental Screening In Sickle Cell Disease: A Longitudinal Cohort Study, Sarah E. Bills, Jeffrey Schatz, Elizabeth Gillooly, Julia D. Johnston, A. Lauren Waters, Alyssa M. Schlenz

Faculty Publications

Aim

To assess the predictive validity of neurodevelopmental screening in toddlers and preschool children with sickle cell disease (SCD) using the Ages and Stages Questionnaire (ASQ). We expected screening in preschool children to predict academic problems in elementary school and future stroke risk.

Method

Using a longitudinal cohort design, academic problems (e.g. grade retention, failing a subject) and increases in stroke risk (e.g. abnormal transcranial Doppler exam) were assessed for a 6-year period after neurodevelopmental screening in 2-year-olds (‘toddlers’) and 4-year-olds (‘preschool children’) using medical record review, which included annual information from parents about school functioning. Biopsychosocial variables were examined …


Deportations And Latino Segregation: The Residential Impacts Of Interior Immigration Enforcement, Matthew Hall, Jacob S. Rugh, Hao Liang Apr 2025

Deportations And Latino Segregation: The Residential Impacts Of Interior Immigration Enforcement, Matthew Hall, Jacob S. Rugh, Hao Liang

Faculty Publications

The shift of immigration enforcement to local jurisdictions has intensified localized patterns of anti-immigrant sentiment, enabling the system of mass deportation to expand at an unprecedented scale. This study examines the effects of 287 (g) agreements, which empower local law enforcement to enforce immigration laws, on Latino residential segregation. Using a quasi-experimental design that compares counties implementing 287 (g) with those that applied but did not implement, we find that these policies significantly slowed declines in Hispanic-white segregation, particularly in early-adopting Southern counties where enforcement was most aggressive. We find no evidence that the program altered patterns of segregation for …


Barriers To Using Bicycle Workstations In A Campus Library, Catherine Wong, Cynthia Ferrara, Robyn Lebowitz, Hayleigh Duggan Apr 2025

Barriers To Using Bicycle Workstations In A Campus Library, Catherine Wong, Cynthia Ferrara, Robyn Lebowitz, Hayleigh Duggan

Faculty Publications

Background

The purpose of this study is to assess campus awareness and attitudes toward bicycle workstations in the library at a small, private college in the New England region of the United States.

Methods

Two recumbent and two Expresso bicycle workstations were placed in public areas of the college library. A short online survey with multiple choice and open-ended questions was designed specifically for the study. Members of the campus community were invited to complete the survey, as approved by the Institutional Review Board. Themes were identified for open-ended questions. Answers were sorted using designated themes.

Results

Ninety-five people completed …


Enhancing Self-Efficacy For Engagement With Diversity, Equity, And Inclusion Initiatives: Evaluation Of A Seven-Day Immersive Pilot Program In A College Of Education, Health, And Human Sciences, Jennifer M. Jabson Tree, Stefanie Benjamin, Dorian L. Mccoy Ph.D. Apr 2025

Enhancing Self-Efficacy For Engagement With Diversity, Equity, And Inclusion Initiatives: Evaluation Of A Seven-Day Immersive Pilot Program In A College Of Education, Health, And Human Sciences, Jennifer M. Jabson Tree, Stefanie Benjamin, Dorian L. Mccoy Ph.D.

Faculty Publications

Colleges of health, human sciences, and education are often administratively organized to include a diverse array of human sciences departments that share roots in social justice and a commitment to advancing equity and inclusion. Despite espoused commitments to equity and inclusion, they frequently struggle to achieve the changes necessary for advancing equity, and inclusion principles across policies, practices, procedures, and units. We implemented and evaluated a 7-day, total immersion, 56-h, educational program entitled the “Social Justice Institute” (SJI) for two cohorts of faculty, staff, and administrators to develop self-efficacy to intervene in systemic oppression in their academic units. SJI delivered …


Giving Day Impacts Students In Math Department, Anthony Bosman Apr 2025

Giving Day Impacts Students In Math Department, Anthony Bosman

Faculty Publications

No abstract provided.


“I Think Even In Challenging Times We Can Still Be Uplifting”: Indigenous Women’S Experiences Of Resilience To The Covid-19 Pandemic In Alaska, Marya Rozanova-Smith, Charlene Apok, Andrey N. Petrov Apr 2025

“I Think Even In Challenging Times We Can Still Be Uplifting”: Indigenous Women’S Experiences Of Resilience To The Covid-19 Pandemic In Alaska, Marya Rozanova-Smith, Charlene Apok, Andrey N. Petrov

Faculty Publications

During the COVID-19 pandemic, Alaska communities faced an extremely challenging situation given their socioeconomic, cultural, and demographic characteristics, as well as issues related to remoteness and colonial legacy. This paper seeks to advance the understanding of the gendered impacts and implications of crises like the COVID-19 pandemic on Indigenous women in Alaskan urban and rural communities through a resilience lens. The paper addresses two primary research questions: (1) What are the impacts of the COVID-19 pandemic on Indigenous women in urban and rural Alaska, and specifically what are the gendered implications in the personal, sociocultural, and economic domains? (2) What …


Simultaneous Observations Of Irregular Sporadic E Structures Using The Lwa And A Dps4d, Kenneth S. Obenberger, C. A. Taylor, Jonah J. Colman, Eugene Dao, J. Dowell, J. D. Eccles, Daniel J. Emmons, C. T. Fallen, J. M. Holmes, G. B. Taylor Apr 2025

Simultaneous Observations Of Irregular Sporadic E Structures Using The Lwa And A Dps4d, Kenneth S. Obenberger, C. A. Taylor, Jonah J. Colman, Eugene Dao, J. Dowell, J. D. Eccles, Daniel J. Emmons, C. T. Fallen, J. M. Holmes, G. B. Taylor

Faculty Publications

Multi-instrument studies have recently shed new light on the morphology of sporadic E, especially intense sporadic E. Here we present simultaneous observations of dense sporadic E (Es) structures using the Long Wavelength Array (LWA) radio telescopes and a Digisonde Portable Sounder 4D (DPS4D). Our coordinated observations show that the LWA radio telescopes in central New Mexico can reliably locate regions of dense Es structures as they pass over a Digisonde located over 500 km away in Texas. The LWA appears to be most sensitive to the densest Es structures, which also appear to contain irregularities with vertical …


Global Campus, Christian Stuart Apr 2025

Global Campus, Christian Stuart

Faculty Publications

No abstract provided.


Urban Heat Mapping Strategies For Predicting Near-Surface Air Temperature In Unsampled Cities In Iowa, Mark D. Ecker, John P. Degroote, Clemir A. Coproski, Bingqing Liang, John Darko, James T. Dietrich Apr 2025

Urban Heat Mapping Strategies For Predicting Near-Surface Air Temperature In Unsampled Cities In Iowa, Mark D. Ecker, John P. Degroote, Clemir A. Coproski, Bingqing Liang, John Darko, James T. Dietrich

Faculty Publications

Elevated urban temperatures are a significant concern across the globe due to their negative health effects and increased energy use. Understanding the spatial variation in urban air temperatures can lead to informed mitigation and planning efforts. Air temperatures for multiple urban areas in the state of Iowa, USA, at three times of the day, were collected using customized sensors mounted on vehicles driven through a variety of landscapes in each urban area. Geographic information systems technology was used to process high-resolution landscape datasets and derive variables that summarize the urban landscape surrounding each temperature measurement point. Five different statistical models: …


Global Ionospheric F Region Parameters From Gnss-Pod Limb Measurements: Evaluations And Comparisons With Two Empirical Models - Iri-2020 And Nequick-2, Nimalan Swarnalingam, Dong L. Wu, Dieter Bilitza, Daniel J. Emmons, Cornelius Csar Jude H. Salinas, Artem Smirnov, Yenca Migoya-Oru Apr 2025

Global Ionospheric F Region Parameters From Gnss-Pod Limb Measurements: Evaluations And Comparisons With Two Empirical Models - Iri-2020 And Nequick-2, Nimalan Swarnalingam, Dong L. Wu, Dieter Bilitza, Daniel J. Emmons, Cornelius Csar Jude H. Salinas, Artem Smirnov, Yenca Migoya-Oru

Faculty Publications

An optimal estimation (OE) technique has recently been developed for F region electron density (Ne) using Global Navigation Satellite System (GNSS) limb sounding on low Earth orbit (LEO) satellites (COSMIC-2, Spire, and FengYun-3). This method provides unprecedented spatiotemporal sampling for global monthly Ne climatology within 100–500 km in 2 hr intervals. The global dataset, collected during mid to moderately high solar activity, is compared with leading models: IRI-2020 and NeQuick-2. Diurnal variations in summer, winter, and equinoctial months are examined for the F2-layer peak, as well as the topside and bottomside of the F region. The observed and modeled NmF2 …


Small-Scale Production Of Bespoke Accelerated Aging Plutonium Alloy, K. S. Holliday, A. M. Parkes, Devin Rappleye, D. J. Roberts, K. J. Kondrat, S. A. Simpson, A. J. Swift, U. Mehta, R. M. Kissinger, D. L. Rosas, L. S. Ripplinger, E. R. Tardiff, S. L. Harris, S. Perkins, C. Hawkins, N. J. Gibbs, R. J. P. Driscoll, A. T. Sidambe, R. A. Cole, T. T. Roehling, J R. Jeffries Apr 2025

Small-Scale Production Of Bespoke Accelerated Aging Plutonium Alloy, K. S. Holliday, A. M. Parkes, Devin Rappleye, D. J. Roberts, K. J. Kondrat, S. A. Simpson, A. J. Swift, U. Mehta, R. M. Kissinger, D. L. Rosas, L. S. Ripplinger, E. R. Tardiff, S. L. Harris, S. Perkins, C. Hawkins, N. J. Gibbs, R. J. P. Driscoll, A. T. Sidambe, R. A. Cole, T. T. Roehling, J R. Jeffries

Faculty Publications

This study demonstrates the 100 g scale manufacture of a plutonium alloy that ages at an accelerated rate. The resulting alloy ages six times faster than typical weapons-grade plutonium due to the addition of 238Pu. As a major innovation, the process involved using a partial direct oxide reduction technique. This method was achieved by developing a new, complex geometry stirrer using additive manufacturing to reduce the 238Pu oxide and efficiently incorporate it into weapons-grade plutonium metal. The material was then purified by molten salt extraction and electrorefining before being alloyed with gallium. The alloy was then cold-rolled and …


Changes In The Incidence, Viral Coinfection Pattern And Outcomes Of Pneumococcal Hospitalizations During And After The Covid-19 Pandemic, King-Pui Florence Chan, Ting Fung Ma, Hanshu Fang, Wai-Kai Tsui, James Chung-Man Ho, Mary Sau-Man Ip, Pak-Leung Ho Apr 2025

Changes In The Incidence, Viral Coinfection Pattern And Outcomes Of Pneumococcal Hospitalizations During And After The Covid-19 Pandemic, King-Pui Florence Chan, Ting Fung Ma, Hanshu Fang, Wai-Kai Tsui, James Chung-Man Ho, Mary Sau-Man Ip, Pak-Leung Ho

Faculty Publications

Background

The incidence of pneumococcal pneumonia in the context of the Coronavirus Disease 2019 (COVID-19) pandemic, along with the real-world data on the ratio of non-invasive to invasive pneumococcal pneumonia, is an area that has not been thoroughly studied. The outcomes associated with coinfection of influenza and COVID-19 remain unknown. This study examined the incidence, demographics, coinfection with influenza and/or COVID-19, and clinical outcomes of pneumococcal hospitalizations in Hong Kong during the baseline, pandemic, and post-pandemic periods.

Methods

Hospitalization records of individuals aged 18 years and above with pneumococcal disease from January 2015 to August 2024 were extracted from the …


Scalable Cyber-Physical Testbed For Cybersecurity Evaluation Of Synchrophasors In Power Systems, Shuvangkar Chandra Das, Tuyen Vu, Hebert L. Ginn Iii Apr 2025

Scalable Cyber-Physical Testbed For Cybersecurity Evaluation Of Synchrophasors In Power Systems, Shuvangkar Chandra Das, Tuyen Vu, Hebert L. Ginn Iii

Faculty Publications

This paper presents a synchrophasor-based real-time cyber-physical power system testbed with a novel security evaluation tool, pySynphasor, that can emulate different real attack scenarios on the phasor measurement unit (PMU). The testbed focuses on real-time cyber-security emulation using different components, including a real-time digital simulator, virtual machines (VM), a communication network emulator, and a packet manipulation tool. The script-based VM deployment and software-defined network emulation facilitate a highly scalable cyber-physical testbed, which enables emulations of a real power system under different attack scenarios such as address resolution protocol (ARP) poisoning attack, man-in-the-middle (MITM) attack, false data injection attack (FDIA), and …


Sexually Transmitted Infection (Sti) Incidence And Risk Factors Among People With Hiv (Pwh): Insights From A 13-Year Cohort Study In South Carolina, Salome-Joelle Gass, Shujie Chen, Jiajia Zhang Ph.D., Bankole Olatosi Apr 2025

Sexually Transmitted Infection (Sti) Incidence And Risk Factors Among People With Hiv (Pwh): Insights From A 13-Year Cohort Study In South Carolina, Salome-Joelle Gass, Shujie Chen, Jiajia Zhang Ph.D., Bankole Olatosi

Faculty Publications

The Ending the HIV Epidemic (EHE) initiative aims to reduce new HIV infections by 90% by 2030 in the United States (US). However, rising sexually transmitted infection (STI) rates exacerbate the bidirectional infection risk between HIV and STIs. Most research on STIs among people with HIV (PWH) has focused on high-risk groups, resulting in limited data on broader populations. This study addresses that gap by examining the incidence and risk factors for gonorrhea, chlamydia, and syphilis in a statewide cohort of PWH in South Carolina. Data from South Carolina’s HIV and STI surveillance systems were linked, and all PWH aged …


Promoting Social Inclusion Through Sport: A Case Study Of Uyghur Youth In China, Hongxin Li, Yunchao Bai, John Nauright Apr 2025

Promoting Social Inclusion Through Sport: A Case Study Of Uyghur Youth In China, Hongxin Li, Yunchao Bai, John Nauright

Faculty Publications

This study examines the role of sports as a means of promoting social inclusion among Uyghur youth in China, drawing upon social inclusion theory. Utilizing a qualitative case study methodology, we explored the perspectives of Uyghur youth athletes to gain insight into the challenges they face in achieving social inclusion without feeling “othered” or excluded. Data analysis followed an inductive grounded theory approach, identifying first‐order concepts, second‐order themes, and aggregate theoretical dimensions. Our findings reveal that social inclusion of Uyghur youth through sports participation is influenced by multiple factors, including language barriers, stereotypes, cultural differences, high expectations, and government policies. …


Unveiling The Interfacial Reconstruction Mechanism Enabling Stable Growth Of The Delafossite Pdcoo2 On Al2o3 And Laalo3, Anna Scheid, Tobias Heil, Y. Eren Suyolcu, Qi Song, Niklas Enderlein, Arnaud P. Nono Tchiomo, Prosper Ngabonziza, Philipp Hansmann, Darrell G. Schlom, Peter A. Van Aken Apr 2025

Unveiling The Interfacial Reconstruction Mechanism Enabling Stable Growth Of The Delafossite Pdcoo2 On Al2o3 And Laalo3, Anna Scheid, Tobias Heil, Y. Eren Suyolcu, Qi Song, Niklas Enderlein, Arnaud P. Nono Tchiomo, Prosper Ngabonziza, Philipp Hansmann, Darrell G. Schlom, Peter A. Van Aken

Faculty Publications

Delafossites, composed of noble metal (A+) and strongly correlated sublayers (BO2-), form natural superlattices with highly anisotropic properties. These properties hold significant promise for various applications, but their exploitation hinges on the successful growth of high-quality thin films on suitable substrates. Unfortunately, the unique lattice geometry of delafossites presents a significant challenge to thin-film fabrication. Different delafossites grow differently, even when deposited on the same substrate, ranging from successful epitaxy to complete growth suppression. These variations often lack a clear correlation to obvious causes like lattice mismatch. Unidentified stabilization mechanisms appear to enable growth in certain …


Porous Hierarchically Ordered Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth C. Lloyd, Sujata Dhakal, Shahrouz Amini, Rami Alhasan, Peter Fratzl, Douglas R. Tree, Svetlana Morozova, Robert J. Hickey Apr 2025

Porous Hierarchically Ordered Hydrogels Demonstrating Structurally Dependent Mechanical Properties, Elisabeth C. Lloyd, Sujata Dhakal, Shahrouz Amini, Rami Alhasan, Peter Fratzl, Douglas R. Tree, Svetlana Morozova, Robert J. Hickey

Faculty Publications

While hierarchical ordering is a distinctive feature of natural tissues and is directly responsible for their diverse and unique properties, efforts to synthesize biomaterials have primarily focused on using molecular-based approaches with little emphasis on multiscale structure. Here, we report a bottom-up self-assembly process to produce highly porous hydrogel fibers that resemble extracellular matrices both structurally and mechanically. Physically crosslinked nanostructured micelles form the walls of micrometer-sized water-rich pores with preferred orientation along the fiber direction. Low elastic moduli (< 1 kPa), high elasticity (extending by more than 12 times the initial length), non-linear elasticity (e.g., hyperelasticity), and completely reversible extension are derived from unevenly distributed strain between the micrometer-sized pores and the polymer chains, which is reminiscent of cellular solids. Control of the material microstructure and orientation over many orders of magnitude (e.g., nm–μm), while holding the nanostructure constant, reveals how the multiscale structure directly impacts mechanical properties.


Environmental Risk And Alpha-Gal Syndrome (Ags) In The Mid-Atlantic United States, Brandon D. Hollingsworth Ph.D., Margaret Wiener, Dana A. Giandimenico, Scott P. Commins, Ross M. Boyce Apr 2025

Environmental Risk And Alpha-Gal Syndrome (Ags) In The Mid-Atlantic United States, Brandon D. Hollingsworth Ph.D., Margaret Wiener, Dana A. Giandimenico, Scott P. Commins, Ross M. Boyce

Faculty Publications

Alpha-gal syndrome (AGS), commonly referred to as the tick bite red meat allergy, has been reported worldwide with the number of suspected cases in the United States increasing from 24 in 2009 to over 34,000 in 2019. Within the US, AGS is associated with the bite of two tick species, Amblyomma americanum and Ixodes scapularis, and has particularly high incidence rates in the mid-Atlantic region. Because AGS is associated with tick bites, the risk of developing AGS is affected by the environment individuals visit. Despite this, as well as the numerous studies associating the environment with Am. americanum, …


Effects Of Nitro-Substitution On The Spectroscopic And Self-Assembly Properties Of Bodipy Dyes, Caroline Gwaro, Caroline Ndung’U, Petia Bobadova-Parvanova, Dylan Goliber, Quynh Do, Ashley R. Walker, Evan Murders, Daniel Lamaster, Frank R. Fronczek, Jayne Garno, Maria Da Graça H. Vicente Apr 2025

Effects Of Nitro-Substitution On The Spectroscopic And Self-Assembly Properties Of Bodipy Dyes, Caroline Gwaro, Caroline Ndung’U, Petia Bobadova-Parvanova, Dylan Goliber, Quynh Do, Ashley R. Walker, Evan Murders, Daniel Lamaster, Frank R. Fronczek, Jayne Garno, Maria Da Graça H. Vicente

Faculty Publications

A series of boron dipyrromethene (BODIPY) dyes were nitrated in high yields using nitronium tetrafluoroborate at positions 2, 3, and 2,6 of the BODIPY core. This method allows for the regioselective nitration of the pyrrolic positions under milder conditions than previously reported methods. The photophysical properties and electronic transitions of these BODIPYs were investigated by using UV-vis spectroscopy, fluorescence spectroscopy, and density-functional theory (DFT) calculations. The introduction of one nitro group dramatically increases the dipole moment of the molecule, induces marked blue shifts in the absorption and emission bands, decreases the molar absorptivity, and increases the Stokes shifts of the …


Ligo Detector Characterization In The First Half Of The Fourth Observing Run, S. Soni, B. K. Berger, D. Davis, F. Di Renzo, A. Effler, T. A. Ferreira, J. Glanzer, E. Goetz, G. González, A. Helmling-Cornell, B. Hughey, R. Huxford, B. Mannix, G. Mo, D. Nandi, A. Neunzert, S. Nichols, K. Pham, A. I. Renzini, R. M.S. Schofield, A. Stuver, M. Trevor, S. Álvarez-López, R. Beda, C. P.L. Berry, S. Bhuiyan, L. Blagg, R. Bruntz, S. Callos, M. Chan, P. Charlton, N. Christensen, G. Connolly Apr 2025

Ligo Detector Characterization In The First Half Of The Fourth Observing Run, S. Soni, B. K. Berger, D. Davis, F. Di Renzo, A. Effler, T. A. Ferreira, J. Glanzer, E. Goetz, G. González, A. Helmling-Cornell, B. Hughey, R. Huxford, B. Mannix, G. Mo, D. Nandi, A. Neunzert, S. Nichols, K. Pham, A. I. Renzini, R. M.S. Schofield, A. Stuver, M. Trevor, S. Álvarez-López, R. Beda, C. P.L. Berry, S. Bhuiyan, L. Blagg, R. Bruntz, S. Callos, M. Chan, P. Charlton, N. Christensen, G. Connolly

Faculty Publications

Progress in gravitational-wave (GW) astronomy depends upon having sensitive detectors with good data quality. Since the end of the Laser Interferometer Gravitational-Wave Observatory-Virgo-KAGRA third Observing run in March 2020, detector-characterization efforts have lead to increased sensitivity of the detectors, swifter validation of GW candidates and improved tools used for data-quality products. In this article, we discuss these efforts in detail and their impact on our ability to detect and study GWs. These include the multiple instrumental investigations that led to reduction in transient noise, along with the work to improve software tools used to examine the detectors data-quality. We end …


Human Capital And Lifetime Income Gains Of Scaling-Up Small-Quantity Lipid Nutrient Supplements Among Children Under 2 Years: A Modelling Analysis, Nandita Perumal Phd, Goodrarz Danaei, Günther Fink, Mark Lambiris, Christopher R. Sudfeld Apr 2025

Human Capital And Lifetime Income Gains Of Scaling-Up Small-Quantity Lipid Nutrient Supplements Among Children Under 2 Years: A Modelling Analysis, Nandita Perumal Phd, Goodrarz Danaei, Günther Fink, Mark Lambiris, Christopher R. Sudfeld

Faculty Publications

Undernutrition in early childhood is associated with adverse health and developmental outcomes later in life and remains a persistent global public health problem. Providing small-quantity lipid nutrient supplements (SQ-LNS) to children aged 6-24 months improves child growth and neurodevelopmental outcomes, but the potential long-term benefits to human capital have not been previously estimated. We estimated the potential returns to schooling and lifetime income attributable to increasing coverage of SQ-LNS for children < 2 years of age from 0% to 50% or 90% per five-year birth cohort in five countries (Bangladesh, Burkina Faso, Ethiopia, Pakistan, and Uganda) with a high burden of undernutrition. Random-effects meta-analyses were used to estimate the effect of SQ-LNS on child development using evidence from randomized controlled trials, and to estimate the returns to lifetime income as a function of change in development based on a de novo meta-analysis of observational economic studies. Gains in school years attributable to scaling-up SQ-LNS to 90% coverage ranged from 0.14 million school years (95% uncertainty interval [UI]: 0.064, …


Disorder Enhanced Thermalization In Interacting Many-Particle System, Chakradhar Rangi, Herbert F. Fotso, Hanna Terletska, Juana Moreno, Ka Ming Tam Apr 2025

Disorder Enhanced Thermalization In Interacting Many-Particle System, Chakradhar Rangi, Herbert F. Fotso, Hanna Terletska, Juana Moreno, Ka Ming Tam

Faculty Publications

We introduce an extension of the nonequilibrium dynamical mean-field theory to incorporate the effects of static random disorder in the dynamics of a many-particle system by integrating out different disorder configurations resulting in an effective time-dependent density-density interaction. We use this method to study the nonequilibrium transient dynamics of a system described by the Fermi Anderson-Hubbard model following an interaction and disorder quench. The method recovers the solution of the disorder-free case for which the system exhibits qualitatively distinct dynamical behaviors in the weak-coupling (prethermalization) and strong-coupling regimes (collapse-and-revival oscillations). However, we find that weak random disorder promotes thermalization. In …


Leveraging Agent-Based Modeling And A Randomized Intervention To Advance Childhood Physical Activity: A Study Protocol, Matt Kasman, Adam B. Sedlak, Lydia Reader, William J. Heerman, Russell R. Pate, Amelie G. Ramirez, Evan C. Sommer, Shari L. Barkin, Ross A. Hammond Apr 2025

Leveraging Agent-Based Modeling And A Randomized Intervention To Advance Childhood Physical Activity: A Study Protocol, Matt Kasman, Adam B. Sedlak, Lydia Reader, William J. Heerman, Russell R. Pate, Amelie G. Ramirez, Evan C. Sommer, Shari L. Barkin, Ross A. Hammond

Faculty Publications

This study (1R01HD107002-01A1) protocol describes the planned creation and use of an agent-based model (ABM) of early childhood physical activity (PA). Successful early childhood PA interventions can potentially play an important role in both increasing overall population health as well as closing health disparities across subpopulations. At present, effective strategies for doing so are currently unknown. In large part, this is because PA determinants operate across levels dynamically, interact with one another, and can differ substantially across children. A complex systems approach—specifically, ABM—can be used to provide important insights about effect pathways driving child PA. Design of the proposed ABM …


Anchoring ‘Neo-Hahnian Outdoor Education’ In The Cold War Era: A History Of Character Building In The Outward Bound Movement, Jayson Seaman Apr 2025

Anchoring ‘Neo-Hahnian Outdoor Education’ In The Cold War Era: A History Of Character Building In The Outward Bound Movement, Jayson Seaman

Faculty Publications

The invitation to comment on a foundational early article from the JAEOL provided a welcome opportunity to engage with Andrew Brookes’s trilogy of ‘neo-Hahnian outdoor education’ critiques (Brookes, 2003a, 2003b, 2023). In this article, I approach outdoor education’s character building ideology by using archival and secondary sources to situate its evolution in four periods corresponding with major geopolitical and cultural movements: (1) 1941–1945 when Outward Bound (OB) was established; (2) 1946–1952 when Hahn exported OB from his perch at Gordonstoun; (3) 1953–1967 when OB expanded to the U.S. and replicated globally, and (4) 1968–1976 when human potentialism replaced muscular Christianity …