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Full-Text Articles in Entire DC Network
The Evaluation Of Machine Learning Techniques For Isotope Identification Contextualized By Training And Testing Spectral Similarity, Aaron P. Fjelsted, Tyler J. Morrow, Clayton D. Scott, Yilun Zhu, Darren E. Holland, Azaree T. Lintereur, Douglas E. Wolfe
The Evaluation Of Machine Learning Techniques For Isotope Identification Contextualized By Training And Testing Spectral Similarity, Aaron P. Fjelsted, Tyler J. Morrow, Clayton D. Scott, Yilun Zhu, Darren E. Holland, Azaree T. Lintereur, Douglas E. Wolfe
Faculty Publications
Precise gamma-ray spectral analysis is crucial in high-stakes applications, such as nuclear security. Research efforts toward implementing machine learning (ML) approaches for accurate analysis are limited by the resemblance of the training data to the testing scenarios. The underlying spectral shape of synthetic data may not perfectly reflect measured configurations, and measurement campaigns may be limited by resource constraints. Consequently, ML algorithms for isotope identification must maintain accurate classification performance under domain shifts between the training and testing data. To this end, four different classifiers (Ridge, Random Forest, Extreme Gradient Boosting, and Multilayer Perceptron) were trained on the same dataset …
Footprint Tools Tiptoeing Towards Nitrogen Sustainability, James N. Galloway, Elizabeth A. Castner, Elizabeth S M Dukes, Jessica Fox, Allison M. Leach
Footprint Tools Tiptoeing Towards Nitrogen Sustainability, James N. Galloway, Elizabeth A. Castner, Elizabeth S M Dukes, Jessica Fox, Allison M. Leach
Faculty Publications
As we face multiple environmental crises (e.g. climate change, nutrient pollution, freshwater scarcity), there is often a disconnect between an entity’s activities and the pollution resulting from that activity. Footprint tools help address this disconnect. They are effective in educating people, institutions and communities on how their resource use results in environmental pollution and what we can do to moderate that pollution. These tools connect an entity’s activities with the associated pollution. Footprint tools are also constantly evolving. As we better understand how to best estimate emissions—especially from sources further removed like those from the supply chain—the guidance and methods …
Footprint Tools Tiptoeing Towards Nitrogen Sustainability, James N. Galloway, Elizabeth A. Castner, Elizabeth S M Dukes, Jessica Fox, Allison M. Leach
Footprint Tools Tiptoeing Towards Nitrogen Sustainability, James N. Galloway, Elizabeth A. Castner, Elizabeth S M Dukes, Jessica Fox, Allison M. Leach
Faculty Publications
As we face multiple environmental crises (e.g. climate change, nutrient pollution, freshwater scarcity), there is often a disconnect between an entity’s activities and the pollution resulting from that activity. Footprint tools help address this disconnect. They are effective in educating people, institutions and communities on how their resource use results in environmental pollution and what we can do to moderate that pollution. These tools connect an entity’s activities with the associated pollution. Footprint tools are also constantly evolving. As we better understand how to best estimate emissions—especially from sources further removed like those from the supply chain—the guidance and methods …
Beyond Covid: Towards A Transdisciplinary Synthesis For Understanding Responses And Developing Pandemic Preparedness In Alaska, Taylor P. Van Doren, Ryan A. Brown, Guangqing Chi, Patricia Cochran, Katie Cueva, Laura Eichelberger, Ruby Fried, Stacey Fritz, Micah B. Hahn, Ron Heintz, Davin Holen, Andrey N. Petrov
Beyond Covid: Towards A Transdisciplinary Synthesis For Understanding Responses And Developing Pandemic Preparedness In Alaska, Taylor P. Van Doren, Ryan A. Brown, Guangqing Chi, Patricia Cochran, Katie Cueva, Laura Eichelberger, Ruby Fried, Stacey Fritz, Micah B. Hahn, Ron Heintz, Davin Holen, Andrey N. Petrov
Faculty Publications
Pandemics are regularly occurring events, and there are foundational principles of pandemic preparation upon which communities, regions, states, and nations may draw upon for elevated preparedness against an inevitable future infectious disease threat. Many disciplines within the social sciences can provide crucial insight and transdisciplinary thinking for the development of preparedness measures. In 2023, the National Science Foundation funded a conference of circumpolar researchers and Indigenous partners to reflect on COVID-19-related research. In this article, we synthesise our diverse social science perspectives to: (1) identify potential areas of future pandemic-related research in Alaska, and (2) pose new research questions that …
Neurosymbolic Cognitive Methods For Enhancing Foundation Model-Based Reasoning, Kaushik Roy, Siyu Wu, Alessandro Oltramari
Neurosymbolic Cognitive Methods For Enhancing Foundation Model-Based Reasoning, Kaushik Roy, Siyu Wu, Alessandro Oltramari
Faculty Publications
Foundation models have emerged as powerful tools, exhibiting extraordinary performance across various tasks, such as language processing, visual recognition, code generation, and human-centered engagement. However, recent studies have highlighted their limitations when grounded, abstract, and generalized reasoning capabilities are required. Complex tasks often involve multiple hierarchical reasoning steps, which are typical features of human thinking processes. In fact, in this chapter we claim that cognitively-inspired computational models, such as the so-called Common Model of Cognition, are key to enable complex reasoning within foundation model-based artificial intelligence (AI) systems. We investigate neurosymbolic approaches for mapping AI system components to those of …
Returnees’ Perspectives Of The Adverse Impact Of Forced Displacement On Children, Itunu O. Ilesanmi, Jasmine D. Haynes, Florence O. Ogundimu
Returnees’ Perspectives Of The Adverse Impact Of Forced Displacement On Children, Itunu O. Ilesanmi, Jasmine D. Haynes, Florence O. Ogundimu
Faculty Publications
Conflict-related forced displacement, characterized by the experiences of witnessing violent acts, bombing, torture, separation, and the execution of family members, can severely and negatively impact a child’s social determinants of health (SDOH). These experiences are both direct and indirect forms of adverse childhood experiences (ACEs), and urgent attention is needed to understand the impact of forced displacement on children, who are a vulnerable group, and to develop interventions for all systems that influence the child. This phenomenological qualitative study involved in-depth interviews based on the experiences of returnees (n = 20), who are parents of children who experienced forced displacement. …
Malware Classification Through Abstract Syntax Trees And L-Moments, Anthony J. Rose, Christine M. Schubert Kabban, Scott R. Graham, Wayne C. Henry, Christopher M. Rondeau
Malware Classification Through Abstract Syntax Trees And L-Moments, Anthony J. Rose, Christine M. Schubert Kabban, Scott R. Graham, Wayne C. Henry, Christopher M. Rondeau
Faculty Publications
The ongoing evolution of malware presents a formidable challenge to cybersecurity: identifying unknown threats. Traditional detection methods, such as signatures and various forms of static analysis, inherently lag behind these evolving threats. This research introduces a novel approach to malware detection by leveraging the robust statistical capabilities of L-moments and the structural insights provided by Abstract Syntax Trees (ASTs) and applying them to PowerShell. L-moments, recognized for their resilience to outliers and adaptability to diverse distributional shapes, are extracted from network analysis measures like degree centrality, betweenness centrality, and closeness centrality of ASTs. These measures provide a detailed structural representation …
Model Predictive Control Of A Grid-Scale Thermal Energy Storage System In Relap5-3d, Jaron Wallace, John Hedengren, Kody Powell, Matthew Memmott
Model Predictive Control Of A Grid-Scale Thermal Energy Storage System In Relap5-3d, Jaron Wallace, John Hedengren, Kody Powell, Matthew Memmott
Faculty Publications
This research delves into the integration and control of a Thermal Energy Storage (TES) system with a Small Modular Reactor (SMR), specifically the NuScale VOYGR SMR module in RELAP5-3D. The research methodology centered on modeling the NuScale VOYGR SMR, a light water pressurized water reactor (LWR) with a power output capacity of 77 MWe per module. The reactor and plant details were sourced from NuScale's final safety analysis report and supplemented by information from the NuScale website. The SMR plays a crucial role in energy generation, and to manage and dispatch the produced energy effectively, a robust storage system …
Coarse-Gridded Simulation Of The Nonlinear Schrödinger Equation With Machine Learning, Benjamin F. Akers, Kristina O. F. Williams
Coarse-Gridded Simulation Of The Nonlinear Schrödinger Equation With Machine Learning, Benjamin F. Akers, Kristina O. F. Williams
Faculty Publications
A numerical method for evolving the nonlinear Schrödinger equation on a coarse spatial grid is developed. This trains a neural network to generate the optimal stencil weights to discretize the second derivative of solutions to the nonlinear Schrödinger equation. The neural network is embedded in a symmetric matrix to control the scheme’s eigenvalues, ensuring stability. The machine-learned method can outperform both its parent finite difference method and a Fourier spectral method. The trained scheme has the same asymptotic operation cost as its parent finite difference method after training. Unlike traditional methods, the performance depends on how close the initial data …
Size Fractionation Informs Microbial Community Composition And Interactions In The Eastern Tropical North Pacific Ocean, Madeleine A. Thompson, David L. Valentine, Xuefeng Peng
Size Fractionation Informs Microbial Community Composition And Interactions In The Eastern Tropical North Pacific Ocean, Madeleine A. Thompson, David L. Valentine, Xuefeng Peng
Faculty Publications
Marine microorganisms are drivers of biogeochemical cycles in the world’s oceans, including oxygen minimum zones (OMZs). Using a metabarcoding survey of the 16S rRNA gene, we investigated prokaryotic communities, as well as their potential interactions with fungi, at the coastal, offshore, and peripheral OMZ of the eastern tropical North Pacific. Water samples were collected along a vertical oxygen gradient, and large volumes were filtered through three size fractions, 0.22, 2, and 22 µm. The changes in community composition along the oxygen gradient were driven by Planctomycetota, Bacteroidota, Verrucomicrobiota, and Gammaproteobacteria; most are known degraders of marine polysaccharides and usually associated …
Association Between Bullying Victimization And Health Risk Behavior In Adolescents, Ana Beatriz Pacífico, Eliane Denise Araújo Bacil, Mariana Ardengue, Thiago Silva Piola, Michael Pereira Da Silva, Fabio Fontana, Ademar Avelar, Wagner De Campos
Association Between Bullying Victimization And Health Risk Behavior In Adolescents, Ana Beatriz Pacífico, Eliane Denise Araújo Bacil, Mariana Ardengue, Thiago Silva Piola, Michael Pereira Da Silva, Fabio Fontana, Ademar Avelar, Wagner De Campos
Faculty Publications
Objective: The aim of this study was to examine the association between bullying victimization and health risk behaviors in adolescents. Methods: A representative sample of 1020 adolescents participated in the study. The variables such as bullying, health risk behaviors (tobacco, drugs, alcohol, sedentary behavior, smartphone use, level of physical activity, and sleep), and economic status were assessed using self-reported questionnaires. Odds ratios with 95% confidence intervals (95%CI) were obtained using binary logistic regression and ordinal, gross, and adjusted logistic regression (p< 0.05). Results: Victims of bullying were more likely to smoke (OR 1.75; 95%CI 1.28–2.40), consume alcohol (OR1.43; 95%CI 1.05–1.94), have worse sleep quality (OR 1.94; 95%CI 1.28–2.91), and more sedentary behavior (OR 1.43; 95%CI 1.08–1.89) than those who were not bullied. However, victims were more likely to have high levels of physical activity than their non-bullied peers (OR 1.66; 95%CI 1.22–2.27). Conclusions: Bullying victimization was associated with an increased predisposition for the adoption of health risk behaviors. Interestingly, victims were also more prone to participate in physical activity.
Grit And The Military Service Member: How Cultivating Grit Enhances Performance, Resilience, And Mental Health, Phillip R. Jenkins
Grit And The Military Service Member: How Cultivating Grit Enhances Performance, Resilience, And Mental Health, Phillip R. Jenkins
Faculty Publications
The transition from asymmetric warfare to Great Power Competition has brought the role played by Airmen to the forefront of the conversation. When uncontested operations, superior weaponry, and more detailed intelligence are not guaranteed, the weight of victory rests on the shoulders of Airmen. The exploration of grit and the role it plays in the development and sustainment of mental wellness, resilience, and performance has emerged in this context as a linchpin quality. The idea that an inherent drive, determination, and strength of purpose could offset the impact of stress—both combat and noncombat—is deeply compelling. However, leaders cannot look to …
Formation And Microwave Losses Of Hydrides In Superconducting Niobium Thin Films Resulting From Fluoride Chemical Processing, Carlos G. Torres-Castanedo, Dominic P. Goronzy, Thang Pham, Anthony Mcfadden, Nicholas Materise, Paul Masih Das, Matthew Cheng, Dmitry Lebedev, Stephanie M. Ribet, Mitchell J. Walker, David A. Garcia-Wetten, Cameron J. Kopas, Jayss Marshall, Ella Lachman, Nikolay Zhelev, James A. Sauls, Joshua Y. Mutus, Corey Rae H. Mcrae, Vinayak P. Dravid, Michael J. Bedzyk, Mark C. Hersam
Formation And Microwave Losses Of Hydrides In Superconducting Niobium Thin Films Resulting From Fluoride Chemical Processing, Carlos G. Torres-Castanedo, Dominic P. Goronzy, Thang Pham, Anthony Mcfadden, Nicholas Materise, Paul Masih Das, Matthew Cheng, Dmitry Lebedev, Stephanie M. Ribet, Mitchell J. Walker, David A. Garcia-Wetten, Cameron J. Kopas, Jayss Marshall, Ella Lachman, Nikolay Zhelev, James A. Sauls, Joshua Y. Mutus, Corey Rae H. Mcrae, Vinayak P. Dravid, Michael J. Bedzyk, Mark C. Hersam
Faculty Publications
Superconducting niobium (Nb) thin films have recently attracted significant attention due to their utility for quantum information technologies. In the processing of Nb thin films, fluoride-based chemical etchants are commonly used to remove surface oxides that are known to affect superconducting quantum devices adversely. However, these same etchants can also introduce hydrogen to form Nb hydrides, potentially negatively impacting microwave loss performance. Here, comprehensive materials characterization of Nb hydrides formed in Nb thin films as a function of fluoride chemical treatments is presented. In particular, secondary-ion mass spectrometry, X-ray scattering, and transmission electron microscopy reveal the spatial distribution and phase …
Enhanced Aqueous Formation And Neutralization Of Fine Atmospheric Particles Driven By Extreme Cold, James R. Campbell, Michael Battaglia Jr, Kayane K. Dingilian, Meeta Cesler-Maloney, William R. Simpson, Ellis S. Robinson, Peter F. Decarlo, Brice Temime-Roussel, Barbara D’Anna, Andrew L. Holen, Judy Wu, Kerri A. Pratt, Jack E. Dibb, Athanasios Nenes, Rodney J. Weber, Jingqiu Mao
Enhanced Aqueous Formation And Neutralization Of Fine Atmospheric Particles Driven By Extreme Cold, James R. Campbell, Michael Battaglia Jr, Kayane K. Dingilian, Meeta Cesler-Maloney, William R. Simpson, Ellis S. Robinson, Peter F. Decarlo, Brice Temime-Roussel, Barbara D’Anna, Andrew L. Holen, Judy Wu, Kerri A. Pratt, Jack E. Dibb, Athanasios Nenes, Rodney J. Weber, Jingqiu Mao
Faculty Publications
The prevailing view for aqueous secondary aerosol formation is that it occurs in clouds and fogs, owing to the large liquid water content compared to minute levels in fine particles. Our research indicates that this view may need reevaluation due to enhancements in aqueous reactions in highly concentrated small particles. Here, we show that low temperature can play a role through a unique effect on particle pH that can substantially modulate secondary aerosol formation. Marked increases in hydroxymethanesulfonate observed under extreme cold in Fairbanks, Alaska, demonstrate the effect. These findings provide insight on aqueous chemistry in fine particles under cold …
Early Preclinical Studies Of Ergosterol Peroxide And Biological Evaluation Of Its Derivatives, Taotao Ling, Luz V. Arroyo-Cruz, William R. Smither, Emily K. Seighman, Michelle M. Martínez-Montemayor, Fatima Rivas
Early Preclinical Studies Of Ergosterol Peroxide And Biological Evaluation Of Its Derivatives, Taotao Ling, Luz V. Arroyo-Cruz, William R. Smither, Emily K. Seighman, Michelle M. Martínez-Montemayor, Fatima Rivas
Faculty Publications
Ganoderma lucidum is a medicinal mushroom that produces various pharmacological compounds, including triterpenoids. A major bioactive component of G. lucidum is ergosterol peroxide (EP), which is attributed to its anticancer effects. The current study focuses on the in vitro ADME (absorption, distribution, metabolism, and elimination), in vivo efficacy and toxicity of EP, and the synthesis of new EP derivatives to improve aqueous solubility. It was found that EP is metabolically stable in liver microsomes and plasma. In vivo studies showed that EP inhibits tumor growth in murine cancer models, and it is well tolerated by mice. The maximum tolerated dose …
The Past And Future Of The Fisheries And Marine Ecosystem Model Intercomparison Project, Camilla Novaglio, Andrea Bryndum-Buchholz, Derek P. Tittensor, Tyler D. Eddy, Heike K. Lotze, Cheryl S. Harrison, Ryan F. Heneghan, Olivier Maury, Kelly Ortega-Cisneros, Colleen M. Petrik, Kelsey E. Roberts, Julia L. Blanchard
The Past And Future Of The Fisheries And Marine Ecosystem Model Intercomparison Project, Camilla Novaglio, Andrea Bryndum-Buchholz, Derek P. Tittensor, Tyler D. Eddy, Heike K. Lotze, Cheryl S. Harrison, Ryan F. Heneghan, Olivier Maury, Kelly Ortega-Cisneros, Colleen M. Petrik, Kelsey E. Roberts, Julia L. Blanchard
Faculty Publications
Climate change is increasingly affecting the world's ocean ecosystems, necessitating urgent guidance on adaptation strategies to limit or prevent catastrophic impacts. The Fisheries and Marine Ecosystem Model Intercomparison Project (FishMIP) is a network and framework that provides standardised ensemble projections of the impacts of climate change and fisheries on ocean life and the benefits that it provides to people. Since its official launch in 2013 as a small, self-organized project within the larger Inter-Sectoral Impact Model Intercomparison Project, the FishMIP community has grown substantially and contributed to key international policy processes, such as the Intergovernmental Panel on Climate Change Assessment …
Real Practice Systems Project Menu Of Checklists For Attorneys In Mediation, John Lande
Real Practice Systems Project Menu Of Checklists For Attorneys In Mediation, John Lande
Faculty Publications
This is a detailed menu of checklists for attorneys representing clients in mediation, including actions before, during, and after mediation sessions. The checklists include items about information to provide on websites, compliance with ethical requirements, and reflection and improvement of techniques. They are intended to prompt attorneys to become more conscious and intentional in their work, helping them to develop routines and strategies for dealing with recurring problems.
The checklists are extensive but not exhaustive. They are not recipes to follow strictly, thoughtlessly, or completely. Instead, they should help attorneys decide what to do in any specific case or in …
Too Sensitive Or Not Sensitive Enough? Sensitivity To Context And Justice-Involved Youths' Response To Violence Exposure, Colleen Sbeglia, Curtis Donovyn Smith, Paul J. Frick, Laurence Steinberg, Elizabeth Cauffman
Too Sensitive Or Not Sensitive Enough? Sensitivity To Context And Justice-Involved Youths' Response To Violence Exposure, Colleen Sbeglia, Curtis Donovyn Smith, Paul J. Frick, Laurence Steinberg, Elizabeth Cauffman
Faculty Publications
With high rates of violence exposure among justice-involved youth, it is critical to identify factors that might impact the likelihood of youth engaging in violence themselves. One such factor is sensitivity to context, which describes how sensitive youth are to experiences in their environment. Using an ethnically diverse sample of justice-involved male adolescents (47% Latino, 38% Black/African American, 15% White) aged 13-17 at the time of their first arrest, the results of this study indicate that exposure to violence was related to increased violent behavior six months later, and this effect was strongest among youth who were low in sensitivity …
Ab Initio Leading Order Effective Potential For Elastic Proton Scattering Based On The Symmetry-Adapted No-Core Shell Model, R. B. Baker, Ch Elster, T. Dytrych, K. D. Launey
Ab Initio Leading Order Effective Potential For Elastic Proton Scattering Based On The Symmetry-Adapted No-Core Shell Model, R. B. Baker, Ch Elster, T. Dytrych, K. D. Launey
Faculty Publications
Background: Calculating microscopic optical potentials for elastic scattering at intermediate energies from light nuclei in an ab initio fashion within the Watson expansion has been established within the last few years. Purpose: Based on the Watson expansion of the multiple scattering series, we employ a nonlocal translationally invariant nuclear density derived within the symmetry-adapted no-core shell model (SA-NCSM) framework from a chiral next-to-next-to-leading order (NNLO) nucleon-nucleon interaction and the very same interaction for a consistent full-folding calculation of the effective (optical) potential for nucleon-nucleus scattering for medium-heavy nuclei. Methods: The leading order effective (optical) folding potential is computed by integrating …
B(E2) Measurements In The Yrast Band Of Mg 28: Implications For The N=20 Island Of Inversion, M. S. Martin, H. Asch, G. C. Ball, P. E. Garrett, A. B. Garnsworthy, C. J. Griffin, G. Hackman, G. Hagen, K. D. Launey, G. Leckenby, J. Liang, R. S. Lubna, C. R. Natzke, C. Pearson, A. Redey, G. H. Sargsyan, P. C. Srivastava, K. Starosta, Z. H. Sun, C. E. Svensson, S. Upadhyayula, K. Van Wieren, V. Vedia, J. Williams, A. Woinoski, F. Wu, D. Yates, Z. Yu
B(E2) Measurements In The Yrast Band Of Mg 28: Implications For The N=20 Island Of Inversion, M. S. Martin, H. Asch, G. C. Ball, P. E. Garrett, A. B. Garnsworthy, C. J. Griffin, G. Hackman, G. Hagen, K. D. Launey, G. Leckenby, J. Liang, R. S. Lubna, C. R. Natzke, C. Pearson, A. Redey, G. H. Sargsyan, P. C. Srivastava, K. Starosta, Z. H. Sun, C. E. Svensson, S. Upadhyayula, K. Van Wieren, V. Vedia, J. Williams, A. Woinoski, F. Wu, D. Yates, Z. Yu
Faculty Publications
High-precision lifetime measurements in Mg28 were performed to study neutron shell evolution in Mg isotopes and the onset of the N=20 island of inversion. Using both the recoil distance and Doppler shift attenuation methods, five lifetimes were measured in addition to six upper limits. The observation of two long-lived, negative-parity states demonstrate the importance of studying Mg isotopes for the contribution of intruder configurations to sd-shell nuclei. Lifetimes of the 21+ and 41+ states of 1.81(5) ps and 172(-10+11)stat.(4)stop.(8)feed.(4)targ.fs, respectively, demonstrate a loss of collectivity with increasing spin in the yrast band, permitting for distinguishing between current theoretical models. These …
Ixpe Observation Of Pks 2155'304 Reveals The Most Highly Polarized Blazar, Pouya M. Kouch, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, Fabrizio Tavecchio, Alan P. Marscher, Herman L. Marshall, Steven R. Ehlert, Laura Di Gesu, Svetlana G. Jorstad, Iván Agudo, Grzegorz M. Madejski, Roger W. Romani, Manel Errando, Elina Lindfors, Kari Nilsson, Ella Toppari, Stephen B. Potter, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Callum Mccall, Helen E. Jermak, Iain A. Steele, Ioannis Myserlis, Mark Gurwell, Garrett K. Keating, Ramprasad Rao
Ixpe Observation Of Pks 2155'304 Reveals The Most Highly Polarized Blazar, Pouya M. Kouch, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, Fabrizio Tavecchio, Alan P. Marscher, Herman L. Marshall, Steven R. Ehlert, Laura Di Gesu, Svetlana G. Jorstad, Iván Agudo, Grzegorz M. Madejski, Roger W. Romani, Manel Errando, Elina Lindfors, Kari Nilsson, Ella Toppari, Stephen B. Potter, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Callum Mccall, Helen E. Jermak, Iain A. Steele, Ioannis Myserlis, Mark Gurwell, Garrett K. Keating, Ramprasad Rao
Faculty Publications
We report the X-ray polarization properties of the high-synchrotron-peaked (HSP) blazar PKS 2155'304 based on observations with the Imaging X-ray Polarimetry Explorer (IXPE). We observed the source between Oct 27 and Nov 7, 2023. We also conducted an extensive contemporaneous multiwavelength (MW) campaign. We find that during the first half (T1) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7 ± 2.0)%; this dropped to (15.3 ± 2.1)% during the second half (T2). The X-ray polarization angle remained stable during the IXPE pointing at 129.4 '±1.8 and 125.4 '±3.9 …
Reconstructive Evolutionary Morphology: Tracing The Historical Process Of Modifications Of Complex Systems Driven By Natural Selection Through Changing Ecological Conditions, Dominique G. Homberger
Reconstructive Evolutionary Morphology: Tracing The Historical Process Of Modifications Of Complex Systems Driven By Natural Selection Through Changing Ecological Conditions, Dominique G. Homberger
Faculty Publications
There is general consensus among evolutionary biologists that natural selection drives phenotypic modifications within populations over generational time. How to reconstruct this historical process, however, has been discussed mostly in theoretical terms, and recommendations and explanations on how to translate such theoretical insights into practice are needed. The present study aims at providing a theory-supported practical guide on how to reconstruct historical evolutionary processes by applying a morphology-centered approach through a series of interdependent steps of descriptive morphology, functional analysis, ecological observation, integration of paleoecological data, and evolutionary synthesis. Special attention is given to the development of tests regarding the …
Toward A Comparative Framework For Studies Of Altitudinal Migration, David Vander Pluym, Nicholas A. Mason
Toward A Comparative Framework For Studies Of Altitudinal Migration, David Vander Pluym, Nicholas A. Mason
Faculty Publications
The study and importance of altitudinal migration has attracted increasing interest among zoologists. Altitudinal migrants are taxonomically widespread and move across altitudinal gradients as partial or complete migrants, subjecting them to a wide array of environments and ecological interactions. Here, we present a brief synthesis of recent developments in the field and suggest future directions toward a more taxonomically inclusive comparative framework for the study of altitudinal migration. Our framework centers on a working definition of altitudinal migration that hinges on its biological relevance, which is scale-dependent and related to fitness outcomes. We discuss linguistic nuances of altitudinal movements and …
The K-Profile Parameterization Augmented By Deep Neural Networks (Kpp_Dnn) In The General Ocean Turbulence Model (Gotm), Jianguo Yuan, Jun Hong Liang, Eric P. Chassignet, Olmo Zavala-Romero, Xiaoliang Wan, Meghan F. Cronin
The K-Profile Parameterization Augmented By Deep Neural Networks (Kpp_Dnn) In The General Ocean Turbulence Model (Gotm), Jianguo Yuan, Jun Hong Liang, Eric P. Chassignet, Olmo Zavala-Romero, Xiaoliang Wan, Meghan F. Cronin
Faculty Publications
This study utilizes Deep Neural Networks (DNN) to improve the K-Profile Parameterization (KPP) for the vertical mixing effects in the ocean's surface boundary layer turbulence. The deep neural networks were trained using 11-year turbulence-resolving solutions, obtained by running a large eddy simulation model for Ocean Station Papa, to predict the turbulence velocity scale coefficient and unresolved shear coefficient in the KPP. The DNN-augmented KPP schemes (KPP_DNN) have been implemented in the General Ocean Turbulence Model (GOTM). The KPP_DNN is stable for long-term integration and more efficient than existing variants of KPP schemes with wave effects. Three different KPP_DNN schemes, each …
First-Order Comprehensive Adjoint Sensitivity Analysis Methodology For Neural Ordinary Differential Equations: Mathematical Framework And Illustrative Application To The Nordheim–Fuchs Reactor Safety Model, Dan Gabriel Cacuci
Faculty Publications
This work introduces the mathematical framework of the novel “First-Order Comprehensive Adjoint Sensitivity Analysis Methodology for Neural Ordinary Differential Equations” (1st-CASAM-NODE) which yields exact expressions for the first-order sensitivities of NODE decoder responses to the NODE parameters, including encoder initial conditions, while enabling the most efficient computation of these sensitivities. The application of the 1st-CASAM-NODE is illustrated by using the Nordheim–Fuchs reactor dynamics/safety phenomenological model, which is representative of physical systems that would be modeled by NODE while admitting exact analytical solutions for all quantities of interest (hidden states, decoder outputs, sensitivities with respect to all parameters and initial conditions, …
Fake Base Station Detection And Link Routing Defense, Sourav Purification, Jinoh Kim, Jonghyun Kim, Sang-Yoon Chang
Fake Base Station Detection And Link Routing Defense, Sourav Purification, Jinoh Kim, Jonghyun Kim, Sang-Yoon Chang
Faculty Publications
Fake base stations comprise a critical security issue in mobile networking. A fake base station exploits vulnerabilities in the broadcast message announcing a base station’s presence, which is called SIB1 in 4G LTE and 5G NR, to get user equipment to connect to the fake base station. Once connected, the fake base station can deprive the user of connectivity and access to the Internet/cloud. We discovered that a fake base station can disable the victim user equipment’s connectivity for an indefinite period of time, which we validated using our threat prototype against current 4G/5G practices. We designed and built a …
Preliminary Effectiveness Of A One-Week Summer Day Camp For Improving Children’S Health Behaviors And Psychosocial Well-Being Outcomes, Qiaoyin Tan, Yuxin Nie, Paul Son, Renee A. Underwood, Peyton Murray, Callie Hebert, K. Lynn Mckey, Chelsea Hendrick, Amanda E. Staiano, Senlin Chen
Preliminary Effectiveness Of A One-Week Summer Day Camp For Improving Children’S Health Behaviors And Psychosocial Well-Being Outcomes, Qiaoyin Tan, Yuxin Nie, Paul Son, Renee A. Underwood, Peyton Murray, Callie Hebert, K. Lynn Mckey, Chelsea Hendrick, Amanda E. Staiano, Senlin Chen
Faculty Publications
Purpose: Summer day camp offers children opportunities to grow knowledge and skills, be physically active, and have fun. Compared to healthy children, at-risk children (i.e., overweight, or with obesity and chronic health conditions) typically display less optimal health behaviors and psychosocial well-being, especially during summer months. This study examined the preliminary effectiveness of an American-Diabetes-Association-sponsored summer day camp at improving children’s health behaviors (i.e., physical activity, screen time, diet, sleep) and psychosocial well-being outcomes (i.e., quality of life [QoL], enjoyment, weight-related self-efficacy). Method: The sample consisted of 39 participants, including 19 boys and 20 girls, with majority being overweight (n …
Addressing The Gender Wage Gap For Native American Women, Danielle Digrazia, Ann C. Juliano
Addressing The Gender Wage Gap For Native American Women, Danielle Digrazia, Ann C. Juliano
Faculty Publications
No abstract provided.
Temporal Scales Of Mass Wasting Sedimentation Across The Mississippi River Delta Front Delineated By 210pb/137cs Geochronology, Jeffrey Duxbury, Samuel J. Bentley, Kehui Xu, Navid H. Jafari
Temporal Scales Of Mass Wasting Sedimentation Across The Mississippi River Delta Front Delineated By 210pb/137cs Geochronology, Jeffrey Duxbury, Samuel J. Bentley, Kehui Xu, Navid H. Jafari
Faculty Publications
The Mississippi River Delta Front (MRDF) is a subaqueous apron of rapidly deposited and weakly consolidated sediment extending from the subaerial portions of the Birdsfoot Delta of the Mississippi River, long characterized by mass-wasting sediment transport. Four (4) depositional environments dominate regionally (an undisturbed topset apron, mudflow gully, mudflow lobe, and prodelta), centering around mudflow distribution initiated by a variety of factors (hurricanes, storms, and fluid pressure). To better understand the spatiotemporal scales of the events as well as the controlling processes, eight cores (5.8–8.0 m long) taken offshore from the South Pass (SP) and the Southwest Pass (SWP) were …
A Review Of Agrivoltaic Systems: Addressing Challenges And Enhancing Sustainability, Amro A. Zahrawi, Aly Mousaad Aly
A Review Of Agrivoltaic Systems: Addressing Challenges And Enhancing Sustainability, Amro A. Zahrawi, Aly Mousaad Aly
Faculty Publications
Agrivoltaics is a relatively new term used originally for integrating photovoltaic (PV) systems into the agricultural landscape and expanded to applications such as animal farms, greenhouses, and recreational parks. The dual use of land offers multiple solutions for the renewable energy sector worldwide, provided it can be implemented without negatively impacting agricultural production. However, agrivoltaics represent a relatively new technology, facing challenges including economic viability, vulnerability to wind loads, and interference with growing crops. This paper reviews the recent research on integrating agrivoltaics with farming applications, focusing on challenges, wind impact on agrivoltaics, and economic solutions. The effect of agrivoltaics …