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Louisiana State University

2020

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Mixed Messages: Reading Contemporary U.S. Literature Of Biracial Girlhood, Candice Nicole Hale Dec 2020

Mixed Messages: Reading Contemporary U.S. Literature Of Biracial Girlhood, Candice Nicole Hale

LSU Doctoral Dissertations

The tragic mulatta character is no longer an accurate representation of biracial female characters in literature. This dissertation considers the vast history of the tragic mulatto genre and its tragic and mired representations of biracial women and how they are often portrayed in literature. Within a historical, legal, and political analysis, I highlight the ways perceptions, attitudes, and representations about biracial individuals have changed, so those same shifts should change in the literature. Because of the bourgeoning field of Critical Mixed Race Studies (CMRS), both scholars and authors are recasting and rewriting the narratives and discourses of mixed-race in the …

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Publisher Correction: Exuberant Fibroblast Activity Compromises Lung Function Via Adamts4 (Nature, (2020), 587, 7834, (466-471), 10.1038/S41586-020-2877-5), David F. Boyd, E. Kaitlynn Allen, Adrienne G. Randolph, Xi Zhi J. Guo, Yunceng Weng, Catherine J. Sanders, Resha Bajracharya, Natalie K. Lee, Clifford S. Guy, Peter Vogel, Wenda Guan, Yimin Li, Xiaoqing Liu, Tanya Novak, Margaret M. Newhams, Thomas P. Fabrizio, Nicholas Wohlgemuth, Peter M. Mourani, Michele Kong, Ronald C. Sanders, Katherine Irby, Katri Typpo, Barry Markovitz, Natalie Cvijanovich, Heidi Flori, Adam Schwarz, Nick Anas, Peter Mourani, Angela Czaja, Gwenn Mclaughlin, Matthew Paden, Keiko Tarquinio, Bria M. Coates, Neethi Pinto Dec 2020

Publisher Correction: Exuberant Fibroblast Activity Compromises Lung Function Via Adamts4 (Nature, (2020), 587, 7834, (466-471), 10.1038/S41586-020-2877-5), David F. Boyd, E. Kaitlynn Allen, Adrienne G. Randolph, Xi Zhi J. Guo, Yunceng Weng, Catherine J. Sanders, Resha Bajracharya, Natalie K. Lee, Clifford S. Guy, Peter Vogel, Wenda Guan, Yimin Li, Xiaoqing Liu, Tanya Novak, Margaret M. Newhams, Thomas P. Fabrizio, Nicholas Wohlgemuth, Peter M. Mourani, Michele Kong, Ronald C. Sanders, Katherine Irby, Katri Typpo, Barry Markovitz, Natalie Cvijanovich, Heidi Flori, Adam Schwarz, Nick Anas, Peter Mourani, Angela Czaja, Gwenn Mclaughlin, Matthew Paden, Keiko Tarquinio, Bria M. Coates, Neethi Pinto

Faculty Publications

© 2020, The Author(s), under exclusive licence to Springer Nature Limited. An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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An Asymptotic Formula For Integrals Of Products Of Jacobi Polynomials, Maxim Derevyagin, Nicholas Juricic Dec 2020

An Asymptotic Formula For Integrals Of Products Of Jacobi Polynomials, Maxim Derevyagin, Nicholas Juricic

Journal of Stochastic Analysis

No abstract provided.

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Groundwater Production From Geothermal Heating On Early Mars And Implication For Early Martian Habitability, Lujendra Ojha, Jacob Buffo, Suniti Karunatillake, Matthew Siegler Dec 2020

Groundwater Production From Geothermal Heating On Early Mars And Implication For Early Martian Habitability, Lujendra Ojha, Jacob Buffo, Suniti Karunatillake, Matthew Siegler

Faculty Publications

Copyright © 2020 The Authors, In explaining extensive evidence for past liquid water, the debate on whether Mars was primarily warm and wet or cold and arid 4 billion years (Ga) ago has continued for decades. The Sun’s luminosity was ~30% lower 4 Ga ago; thus, most martian climate models struggle to elevate the mean surface temperature past the melting point of water. Basal melting of ice sheets may help resolve that paradox. We modeled the thermophysical evolution of ice and estimate the geothermal heat flux required to produce meltwater on a cold, arid Mars. We then analyzed geophysical and …

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Body Size Trends In Response To Climate And Urbanization In The Widespread North American Deer Mouse, Peromyscus Maniculatus, Robert Guralnick, Maggie M. Hantak, Daijiang Li, Bryan S. Mclean Dec 2020

Body Size Trends In Response To Climate And Urbanization In The Widespread North American Deer Mouse, Peromyscus Maniculatus, Robert Guralnick, Maggie M. Hantak, Daijiang Li, Bryan S. Mclean

Faculty Publications

© 2020, The Author(s). Body size decline is hypothesized to be a key response to climate warming, including warming driven by urban heat islands. However, urbanization may also generate selective gradients for body size increases in smaller endotherms via habitat fragmentation. Here we utilize a densely sampled, multi-source dataset to examine how climate and urbanization affect body size of Peromyscus maniculatus (PEMA), an abundant rodent found across North America. We predicted PEMA would conform to Bergmann’s Rule, e.g. larger individuals in colder climates, spatially and temporally. Hypotheses regarding body size in relation to urbanization are less clear; however, with increased …

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Geographic Patterns And Environmental Correlates Of Phylogenetic Relatedness And Diversity For Freshwater Fish Assemblages In North America, Hong Qian, Yong Cao, Daijiang Li, Cindy Chu, Brody Sandel, Xianli Wang Dec 2020

Geographic Patterns And Environmental Correlates Of Phylogenetic Relatedness And Diversity For Freshwater Fish Assemblages In North America, Hong Qian, Yong Cao, Daijiang Li, Cindy Chu, Brody Sandel, Xianli Wang

Faculty Publications

© 2020 The Authors. Ecography published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos The tropical niche conservatism hypothesis suggests that most groups should be most phylogenetically clustered in cold, dry environments. This idea has been well-tested in plants and some animal groups, but not for fishes. We assess the geographic patterns of freshwater fish phylogenetic structure and investigate the relationships between these patterns and environmental variables across North America and within two biogeographic realms. Phylogenetic relatedness and diversity of 360 freshwater fish assemblages across North America were quantified with three metrics based on a well-dated …

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First Results On Protodune-Sp Liquid Argon Time Projection Chamber Performance From A Beam Test At The Cern Neutrino Platform, B. Abi, A. Abed Abud, R. Acciarri, M. A. Acero, G. Adamov, M. Adamowski, D. Adams, P. Adrien, M. Adinolfi, Z. Ahmad, J. Ahmed, T. Alion, S. Alonso Monsalve, C. Alt, J. Anderson, C. Andreopoulos, M. P. Andrews, F. Andrianala, S. Andringa, A. Ankowski, M. Antonova, S. Antusch, A. Aranda-Fernandez, A. Ariga, L. O. Arnold, M. A. Arroyave, J. Asaadi, A. Aurisano Dec 2020

First Results On Protodune-Sp Liquid Argon Time Projection Chamber Performance From A Beam Test At The Cern Neutrino Platform, B. Abi, A. Abed Abud, R. Acciarri, M. A. Acero, G. Adamov, M. Adamowski, D. Adams, P. Adrien, M. Adinolfi, Z. Ahmad, J. Ahmed, T. Alion, S. Alonso Monsalve, C. Alt, J. Anderson, C. Andreopoulos, M. P. Andrews, F. Andrianala, S. Andringa, A. Ankowski, M. Antonova, S. Antusch, A. Aranda-Fernandez, A. Ariga, L. O. Arnold, M. A. Arroyave, J. Asaadi, A. Aurisano

Faculty Publications

The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber with an active volume of 7.2× 6.1× 7.0 m3. It is installed at the CERN Neutrino Platform in a specially-constructed beam that delivers charged pions, kaons, protons, muons and electrons with momenta in the range 0.3 GeV/c to 7 GeV/c. Beam line instrumentation provides accurate momentum measurements and particle identification. The ProtoDUNE-SP detector is a prototype for the first far detector module of the Deep Underground Neutrino Experiment, and it incorporates full-size components as designed for that module. This paper describes the beam line, the time projection chamber, the …

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Enhanced Hanbury Brown And Twiss Interferometry Using Parametric Amplification, Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling, Hwang Lee Dec 2020

Enhanced Hanbury Brown And Twiss Interferometry Using Parametric Amplification, Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling, Hwang Lee

Faculty Publications

The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a star is very weak, one cannot usually get a workable signal-to-noise ratio. We propose an improved HBT interferometric scheme incorporating optical parametric amplifiers (OPA) into the system to amplify the correlation signal. Remarkably, for weak star light, the signal-to-noise ratio (SNR) in the new HBT interferometric scheme is much better than that of conventional HBT interferometer. Our work is valuable in measuring a star whose intensity at the …

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Deep Learning On The 2-Dimensional Ising Model To Extract The Crossover Region With A Variational Autoencoder, Nicholas Walker, Ka Ming Tam, Mark Jarrell Dec 2020

Deep Learning On The 2-Dimensional Ising Model To Extract The Crossover Region With A Variational Autoencoder, Nicholas Walker, Ka Ming Tam, Mark Jarrell

Faculty Publications

The 2-dimensional Ising model on a square lattice is investigated with a variational autoencoder in the non-vanishing field case for the purpose of extracting the crossover region between the ferromagnetic and paramagnetic phases. The encoded latent variable space is found to provide suitable metrics for tracking the order and disorder in the Ising configurations that extends to the extraction of a crossover region in a way that is consistent with expectations. The extracted results achieve an exceptional prediction for the critical point as well as agreement with previously published results on the configurational magnetizations of the model. The performance of …

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Magic-Angle Semimetals, Yixing Fu, Elio J. König, Justin H. Wilson, Yang Zhi Chou, Jedediah H. Pixley Dec 2020

Magic-Angle Semimetals, Yixing Fu, Elio J. König, Justin H. Wilson, Yang Zhi Chou, Jedediah H. Pixley

Faculty Publications

Breakthroughs in two-dimensional van der Waals heterostructures have revealed that twisting creates a moiré pattern that quenches the kinetic energy of electrons, allowing for exotic many-body states. We show that cold atomic, trapped ion, and metamaterial systems can emulate the effects of a twist in many models from one to three dimensions. Further, we demonstrate at larger angles (and argue at smaller angles) that by considering incommensurate effects, the magic-angle effect becomes a single-particle quantum phase transition (including in a model for twisted bilayer graphene in the chiral limit). We call these models “magic-angle semimetals”. Each contains nodes in the …

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Evidence For Topological Semimetallicity In A Chain-Compound Tase3, Ahmad Ikhwan Us Saleheen, Ramakanta Chapai, Lingyi Xing, Roshan Nepal, Dongliang Gong, Xin Gui, Weiwei Xie, David P. Young, E. W. Plummer, Rongying Jin Dec 2020

Evidence For Topological Semimetallicity In A Chain-Compound Tase3, Ahmad Ikhwan Us Saleheen, Ramakanta Chapai, Lingyi Xing, Roshan Nepal, Dongliang Gong, Xin Gui, Weiwei Xie, David P. Young, E. W. Plummer, Rongying Jin

Faculty Publications

Among one-dimensional transition-metal trichalcogenides, TaSe3 is unconventional in many respects. One is its strong topological semimetallicity as predicted by first-principles calculations. We report the experimental investigations of the electronic properties of one-dimensional-like TaSe3 single crystals. While the b-axis electrical resistivity shows good metallicity with a high residual resistivity ratio greater than 100, an extremely large magnetoresistance is observed reaching ≈7 × 103% at 1.9 K for 14 T. Interestingly, the magnetoresistance follows the Kohler’s rule with nearly quadratic magnetic field dependence, consistent with the electron–hole compensation scenario as confirmed by our Hall conductivity data. Both the longitudinal and Hall conductivities …

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Comparison Of Conventional And Advanced Radiotherapy Techniques For Left-Sided Breast Cancer After Breast Conserving Surgery, Yibo Xie, Daniel Bourgeois, Beibei Guo, Rui Zhang Dec 2020

Comparison Of Conventional And Advanced Radiotherapy Techniques For Left-Sided Breast Cancer After Breast Conserving Surgery, Yibo Xie, Daniel Bourgeois, Beibei Guo, Rui Zhang

Faculty Publications

Whole breast radiotherapy (WBRT) after breast conserving surgery is the standard treatment to prevent recurrence and metastasis of early stage breast cancer. This study aims to compare seven WBRT techniques including conventional tangential, field-in-field (FIF), hybrid intensity-modulated radiotherapy (IMRT), IMRT, standard volumetric modulated arc therapy (STD-VMAT), noncoplanar VMAT (NC-VMAT), and multiple arc VMAT (MA-VMAT). Fifteen patients who were previously diagnosed with left-sided early stage breast cancer and treated in our clinic were selected for this study. WBRT plans were created for these patients and were evaluated based on target coverage and normal tissue toxicities. All techniques produced clinically acceptable WBRT …

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Computer-Based And Paper-And-Pencil Tests: A Study In Calculus For Stem Majors, Lawrence Smolinsky, Brian D. Marx, Gestur Olafsson, Yanxia A. Ma Dec 2020

Computer-Based And Paper-And-Pencil Tests: A Study In Calculus For Stem Majors, Lawrence Smolinsky, Brian D. Marx, Gestur Olafsson, Yanxia A. Ma

Faculty Publications

Computer-based testing is an expanding use of technology offering advantages to teachers and students. We studied Calculus II classes for science, technology, engineering, and mathematics majors using different testing modes. Three sections with 324 students employed: paper-and-pencil testing, computer-based testing, and both. Computer tests gave immediate feedback and allowed multiple submissions and pooling. Paper-and-pencil tests (PPTs) required work and explanation allowing inspection of high cognitive demand tasks. Each test mode used the strength of its method. Students were given the same lecture by the same instructor on the same day and the same homework assignments and due dates. The design …

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The Superfgd Prototype Charged Particle Beam Tests, A. Blondel, M. Bogomilov, S. Bordoni, F. Cadoux, D. Douqa, K. Dugas, T. Ekelof, Y. Favre, S. Fedotov, K. Fransson, R. Fujita, E. Gramstad, A. K. Ichikawa, S. Ilieva, K. Iwamoto, C. Jesús-Valls, C. K. Jung, S. P. Kasetti, M. Khabibullin, A. Khotjantsev, A. Korzenev, A. Kostin, Y. Kudenko, T. Kutter, T. Lux, L. Maret, T. Matsubara, A. Mefodiev Dec 2020

The Superfgd Prototype Charged Particle Beam Tests, A. Blondel, M. Bogomilov, S. Bordoni, F. Cadoux, D. Douqa, K. Dugas, T. Ekelof, Y. Favre, S. Fedotov, K. Fransson, R. Fujita, E. Gramstad, A. K. Ichikawa, S. Ilieva, K. Iwamoto, C. Jesús-Valls, C. K. Jung, S. P. Kasetti, M. Khabibullin, A. Khotjantsev, A. Korzenev, A. Kostin, Y. Kudenko, T. Kutter, T. Lux, L. Maret, T. Matsubara, A. Mefodiev

Faculty Publications

A novel scintillator detector, the SuperFGD, has been selected as the main neutrino target for an upgrade of the T2K experiment ND280 near detector. The detector design will allow nearly 4π coverage for neutrino interactions at the near detector and will provide lower energy thresholds, significantly reducing systematic errors for the experiment. The SuperFGD is made of optically-isolated scintillator cubes of size 10×10×10 mm3, providing the required spatial and energy resolution to reduce systematic uncertainties for future T2K runs. The SuperFGD for T2K will have close to two million cubes in a 1920 × 560 × 1840 mm3 volume. A …

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Enhanced Hanbury Brown And Twiss Interferometry Using Parametric Amplification, Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling, Hwang Lee Dec 2020

Enhanced Hanbury Brown And Twiss Interferometry Using Parametric Amplification, Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling, Hwang Lee

Faculty Publications

The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a star is very weak, one cannot usually get a workable signal-to-noise ratio. We propose an improved HBT interferometric scheme incorporating optical parametric amplifiers (OPA) into the system to amplify the correlation signal. Remarkably, for weak star light, the signal-to-noise ratio (SNR) in the new HBT interferometric scheme is much better than that of conventional HBT interferometer. Our work is valuable in measuring a star whose intensity at the …

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Fenugreek Counters The Effects Of High Fat Diet On Gut Microbiota In Mice: Links To Metabolic Benefit, Annadora J. Bruce-Keller, Allison J. Richard, Sun Ok Fernandez-Kim, David M. Ribnicky, J. Michael Salbaum, Susan Newman, Richard Carmouche, Jacqueline M. Stephens Dec 2020

Fenugreek Counters The Effects Of High Fat Diet On Gut Microbiota In Mice: Links To Metabolic Benefit, Annadora J. Bruce-Keller, Allison J. Richard, Sun Ok Fernandez-Kim, David M. Ribnicky, J. Michael Salbaum, Susan Newman, Richard Carmouche, Jacqueline M. Stephens

Faculty Publications

© 2020, The Author(s). Fenugreek (Trigonella foenum-graecum) is an annual herbaceous plant and a staple of traditional health remedies for metabolic conditions including high cholesterol and diabetes. While the mechanisms of the beneficial actions of fenugreek remain unknown, a role for intestinal microbiota in metabolic homeostasis is likely. To determine if fenugreek utilizes intestinal bacteria to offset the adverse effects of high fat diets, C57BL/6J mice were fed control/low fat (CD) or high fat (HFD) diets each supplemented with or without 2% (w/w) fenugreek for 16 weeks. The effects of fenugreek and HFD on gut microbiota were comprehensively mapped and …

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Targeting Oxytocin Receptor (Oxtr)-Expressing Neurons In The Lateral Septum To Restore Social Novelty In Autism Spectrum Disorder Mouse Models, Machi Horiai, Ayano Otsuka, Shizu Hidema, Yuichi Hiraoka, Ryotaro Hayashi, Shinji Miyazaki, Tamio Furuse, Hiroaki Mizukami, Ryoichi Teruyama, Masaru Tamura, Haruhiko Bito, Yuko Maejima, Kenju Shimomura, Katsuhiko Nishimori Dec 2020

Targeting Oxytocin Receptor (Oxtr)-Expressing Neurons In The Lateral Septum To Restore Social Novelty In Autism Spectrum Disorder Mouse Models, Machi Horiai, Ayano Otsuka, Shizu Hidema, Yuichi Hiraoka, Ryotaro Hayashi, Shinji Miyazaki, Tamio Furuse, Hiroaki Mizukami, Ryoichi Teruyama, Masaru Tamura, Haruhiko Bito, Yuko Maejima, Kenju Shimomura, Katsuhiko Nishimori

Faculty Publications

© 2020, The Author(s). Autism spectrum disorder (ASD) is a continuum of neurodevelopmental disorders and needs new therapeutic approaches. Recently, oxytocin (OXT) showed potential as the first anti-ASD drug. Many reports have described the efficacy of intranasal OXT therapy to improve the core symptoms of patients with ASD; however, the underlying neurobiological mechanism remains unknown. The OXT/oxytocin receptor (OXTR) system, through the lateral septum (LS), contributes to social behavior, which is disrupted in ASD. Therefore, we selectively express hM3Dq in OXTR-expressing (OXTR+) neurons in the LS to investigate this effect in ASD mouse models developed by environmental and genetic cues. …

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Reconstructing Genomes Of Carbon Monoxide Oxidisers In Volcanic Deposits Including Members Of The Class Ktedonobacteria, Marcela Hernández, Blanca Vera-Gargallo, Marcela Calabi-Floody, Gary M. King, Ralf Conrad, Christoph C. Tebbe Dec 2020

Reconstructing Genomes Of Carbon Monoxide Oxidisers In Volcanic Deposits Including Members Of The Class Ktedonobacteria, Marcela Hernández, Blanca Vera-Gargallo, Marcela Calabi-Floody, Gary M. King, Ralf Conrad, Christoph C. Tebbe

Faculty Publications

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Microorganisms can potentially colonise volcanic rocks using the chemical energy in reduced gases such as methane, hydrogen (H2) and carbon monoxide (CO). In this study, we analysed soil metagenomes from Chilean volcanic soils, representing three different successional stages with ages of 380, 269 and 63 years, respectively. A total of 19 metagenome-assembled genomes (MAGs) were retrieved from all stages with a higher number observed in the youngest soil (1640: 2 MAGs, 1751: 1 MAG, 1957: 16 MAGs). Genomic similarity indices showed that several MAGs had amino-acid identity (AAI) values >50% to …

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Climate Change Models Predict Decreases In The Range Of A Microendemic Freshwater Fish In Honduras, Caleb D. Mcmahan, César E. Fuentes-Montejo, Luke Ginger, Juan Carlos Carrasco, Prosanta Chakrabarty, Wilfredo A. Matamoros Dec 2020

Climate Change Models Predict Decreases In The Range Of A Microendemic Freshwater Fish In Honduras, Caleb D. Mcmahan, César E. Fuentes-Montejo, Luke Ginger, Juan Carlos Carrasco, Prosanta Chakrabarty, Wilfredo A. Matamoros

Faculty Publications

© 2020, The Author(s). Despite their incredible diversity, relatively little work has been done to assess impacts of climate change on tropical freshwater organisms. Chortiheros wesseli is a species of Neotropical cichlid (Cichlidae: Cichlinae) restricted to only a few river drainages in the Caribbean-slope of Honduras. Little is known about this species and few specimens had been collected until recently; however, our work with this species in the wild has led to a better understanding of its ecology and habitat preferences making it an excellent model for how freshwater fishes can be affected by climate change. This study assesses the …

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Biological Control Agent Attack Timing And Population Variability, But Not Density, Best Explain Target Weed Density Across An Environmental Gradient, Nathan Harms, James Cronin Dec 2020

Biological Control Agent Attack Timing And Population Variability, But Not Density, Best Explain Target Weed Density Across An Environmental Gradient, Nathan Harms, James Cronin

Faculty Publications

© 2020, The Author(s). Spatial variation in plant–herbivore interactions can be important in pest systems, particularly when insect herbivores are used as biological control agents to manage invasive plants. The geographic ranges of the invasive plant alligatorweed (Alternanthera philoxeroides) and its biological control agent the alligatorweed flea beetle (Agasicles hygrophila) do not completely overlap in the southeastern USA, producing spatial heterogeneity in interaction strength that may be related to latitude-correlated environmental gradients. We studied this system near the range margin of the alligatorweed flea beetle to test whether spatial variation in alligatorweed density was best explained by agent mean or …

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The Effect Of Summer Drought On The Predictability Of Local Extinctions In A Butterfly Metapopulation, Erik Van Bergen, Tad Dallas, Michelle F. Dileo, Aapo Kahilainen, Anniina L.K. Mattila, Miska Luoto, Marjo Saastamoinen Dec 2020

The Effect Of Summer Drought On The Predictability Of Local Extinctions In A Butterfly Metapopulation, Erik Van Bergen, Tad Dallas, Michelle F. Dileo, Aapo Kahilainen, Anniina L.K. Mattila, Miska Luoto, Marjo Saastamoinen

Faculty Publications

© 2020 The Authors. Conservation Biology published by Wiley Periodicals LLC on behalf of Society for Conservation Biology The ecological impacts of extreme climatic events on population dynamics and community composition are profound and predominantly negative. Using extensive data of an ecological model system, we tested whether predictions from ecological models remain robust when environmental conditions are outside the bounds of observation. We observed a 10-fold demographic decline of the Glanville fritillary butterfly (Melitaea cinxia) metapopulation on the Åland islands, Finland in the summer of 2018 and used climatic and satellite data to demonstrate that this year was an anomaly …

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Development Of A Self-Powered Weigh-In-Motion System, Athanassios Papagiannakis, Athanassios Papagiannakis, Samer Dessouky, Sara Ahmed, Reza Khalili, Gopal Vishwakarma Dec 2020

Development Of A Self-Powered Weigh-In-Motion System, Athanassios Papagiannakis, Athanassios Papagiannakis, Samer Dessouky, Sara Ahmed, Reza Khalili, Gopal Vishwakarma

Data

This report describes the development of a novel weigh-in-motion (WIM) system that utilizes piezoelectric elements for sensing load and powering an ultra-low power microcontroller unit (MCU) that serves as its data acquisition system. A system of 4 piezoelectric (PZT) stacks serves as the energy harvester, while load sensing is done via a set of 4 PZT elements connected in parallel. Two alternative MCUs were considered, with various data handling capabilities and power consumption requirements. These MCUs have very short “wake-up” times allowing vehicle sensing without the need for inductive loops commonly used in conventional WIM systems. Special electric circuits were …

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Neutron Star Mergers And How To Study Them, Eric Burns Dec 2020

Neutron Star Mergers And How To Study Them, Eric Burns

Faculty Publications

Neutron star mergers are the canonical multimessenger events: they have been observed through photons for half a century, gravitational waves since 2017, and are likely to be sources of neutrinos and cosmic rays.Studies of these events enable unique insights into astrophysics, particles in the ultrarelativistic regime, the heavy element enrichment history through cosmic time, cosmology, dense matter, and fundamental physics. Uncovering this science requires vast observational resources, unparalleled coordination, and advancements in theory and simulation, which are constrained by our current understanding of nuclear, atomic, and astroparticle physics. This review begins with a summary of our current knowledge of these …

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Prospects For Observing And Localizing Gravitational-Wave Transients With Advanced Ligo, Advanced Virgo And Kagra, B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C. Adams, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T. Akutsu, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, M. Ando, S. V. Angelova, S. Antier, S. Appert, K. Arai, Koya Arai, Y. Arai, S. Araki Dec 2020

Prospects For Observing And Localizing Gravitational-Wave Transients With Advanced Ligo, Advanced Virgo And Kagra, B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C. Adams, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T. Akutsu, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, M. Ando, S. V. Angelova, S. Antier, S. Appert, K. Arai, Koya Arai, Y. Arai, S. Araki

Faculty Publications

We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next several years, with the intention of providing information to facilitate planning for multi-messenger astronomy with gravitational waves. We estimate the sensitivity of the network to transient gravitational-wave signals for the third (O3), fourth (O4) and fifth observing (O5) runs, including the planned upgrades of the Advanced LIGO and Advanced Virgo detectors. We study the capability of the network to determine the sky location of the source for gravitational-wave signals from the inspiral of binary systems of …

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Improving The Robustness Of The Advanced Ligo Detectors To Earthquakes, E. Schwartz, A. Pele, J. Warner, B. Lantz, J. Betzwieser, K. L. Dooley, S. Biscans, M. Coughlin, N. Mukund, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, C. Austin, A. M. Baer, M. Ball, S. W. Ballmer, S. Banagiri, D. Barker, L. Barsotti, J. Bartlett, B. K. Berger, D. Bhattacharjee, G. Billingsley, C. D. Blair, R. M. Blair, N. Bode, P. Booker Dec 2020

Improving The Robustness Of The Advanced Ligo Detectors To Earthquakes, E. Schwartz, A. Pele, J. Warner, B. Lantz, J. Betzwieser, K. L. Dooley, S. Biscans, M. Coughlin, N. Mukund, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, C. Austin, A. M. Baer, M. Ball, S. W. Ballmer, S. Banagiri, D. Barker, L. Barsotti, J. Bartlett, B. K. Berger, D. Bhattacharjee, G. Billingsley, C. D. Blair, R. M. Blair, N. Bode, P. Booker

Faculty Publications

Teleseismic, or distant, earthquakes regularly disrupt the operation of ground-based gravitational wave detectors such as Advanced LIGO. Here, we present EQ mode, a new global control scheme, consisting of an automated sequence of optimized control filters that reduces and coordinates the motion of the seismic isolation platforms during earthquakes. This, in turn, suppresses the differential motion of the interferometer arms with respect to one another, resulting in a reduction of DARM signal at frequencies below 100 mHz. Our method greatly improved the interferometers' capability to remain operational during earthquakes, with ground velocities up to 3.9 μm s-1 rms in the …

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Octenidine/Carbenicillin Gumbos As Potential Treatment For Oropharyngeal Gonorrhoea, Kelsey M. Lopez, Jeffrey A. Hobden, Isiah M. Warner Dec 2020

Octenidine/Carbenicillin Gumbos As Potential Treatment For Oropharyngeal Gonorrhoea, Kelsey M. Lopez, Jeffrey A. Hobden, Isiah M. Warner

Faculty Publications

© The Author(s) 2020. Background: Reducing Neisseria gonorrhoeae colonies in the oropharynx is a viable solution to minimize the transmission of this bacterium amongst individuals. Objectives: A strategy involving the electrostatic interaction between a common antiseptic and a discontinued antibiotic (i.e. octenidine and carbenicillin) was evaluated as a potential treatment for gonorrhoea. Octenidine/carbenicillin is a novel group of uniform materials based on organic salts (GUMBOS) with inherent in vitro antibacterial activity that comes from its parent antiseptic and antibacterial ions, octenidine and carbenicillin, respectively. Methods: Antibacterial activities for octenidine dihydrochloride, disodium carbenicillin, octenidine/carbenicillin and stoichiometrically equivalent 1:1 octenidine dihydrochloride to …

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Qcm Sensor Arrays, Electroanalytical Techniques And Nir Spectroscopy Coupled To Multivariate Analysis For Quality Assessment Of Food Products, Raw Materials, Ingredients And Foodborne Pathogen Detection: Challenges And Breakthroughs†, David K. Bwambok, Noureen Siraj, Samantha Macchi, Nathaniel E. Larm, Gary A. Baker, Rocío L. Pérez, Caitlan E. Ayala, Charuksha Walgama, David Pollard, Jason D. Rodriguez, Souvik Banerjee, Brianda Elzey, Isiah M. Warner, Sayo O. Fakayode Dec 2020

Qcm Sensor Arrays, Electroanalytical Techniques And Nir Spectroscopy Coupled To Multivariate Analysis For Quality Assessment Of Food Products, Raw Materials, Ingredients And Foodborne Pathogen Detection: Challenges And Breakthroughs†, David K. Bwambok, Noureen Siraj, Samantha Macchi, Nathaniel E. Larm, Gary A. Baker, Rocío L. Pérez, Caitlan E. Ayala, Charuksha Walgama, David Pollard, Jason D. Rodriguez, Souvik Banerjee, Brianda Elzey, Isiah M. Warner, Sayo O. Fakayode

Faculty Publications

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Quality checks, assessments, and the assurance of food products, raw materials, and food ingredients is critically important to ensure the safeguard of foods of high quality for safety and public health. Nevertheless, quality checks, assessments, and the assurance of food products along distribution and supply chains is impacted by various challenges. For instance, the development of portable, sensitive, low-cost, and robust instrumentation that is capable of real-time, accurate, and sensitive analysis, quality checks, assessments, and the assurance of food products in the field and/or in the production line in a food …

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An Asynchronous And Task-Based Implementation Of Peridynamics Utilizing Hpx—The C++ Standard Library For Parallelism And Concurrency, Patrick Diehl, Prashant K. Jha, Hartmut Kaiser, Robert Lipton, Martin Lévesque Dec 2020

An Asynchronous And Task-Based Implementation Of Peridynamics Utilizing Hpx—The C++ Standard Library For Parallelism And Concurrency, Patrick Diehl, Prashant K. Jha, Hartmut Kaiser, Robert Lipton, Martin Lévesque

Faculty Publications

On modern supercomputers, asynchronous many task systems are emerging to address the new architecture of computational nodes. Through this shift of increasing cores per node, a new programming model with focus on handling of the fine-grain parallelism with increasing amount of cores per computational node is needed. Asynchronous Many Task (AMT) run time systems represent a paradigm for addressing the fine-grain parallelism. They handle the increasing amount of threads per node and concurrency. HPX, a open source C++ standard library for parallelism and concurrency, is one AMT which is conforming to the C++ standard. Motivated by the impressive performance of …

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Sequential Predictors For Delay Compensation For Discrete Time Systems With Time-Varying Delays, Frédéric Mazenc, Michael Malisoff, Indra Narayana Sandilya Bhogaraju Dec 2020

Sequential Predictors For Delay Compensation For Discrete Time Systems With Time-Varying Delays, Frédéric Mazenc, Michael Malisoff, Indra Narayana Sandilya Bhogaraju

Faculty Publications

We study time-varying linear discrete time systems with uncertainties and time-varying measurement delays, whose outputs are perturbed by uncertainty. We build sequential predictors, which ensure input-to-state stability with respect to the uncertainties and which can be constructed using output values under arbitrarily long delays. The number of required sequential predictors is any upper bound for the delay in our feedback stabilized closed loop systems. We illustrate our work in a digital control problem for a continuous time system that is discretized through sampling.

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On Subdiagonal Rational Pade Approximations And The Brenner-Thomee Approximation Theorem For Operator Semigroups, Frank Neubrander, Koray Ozer, Lee Windsperger Dec 2020

On Subdiagonal Rational Pade Approximations And The Brenner-Thomee Approximation Theorem For Operator Semigroups, Frank Neubrander, Koray Ozer, Lee Windsperger

Faculty Publications

The computational powers of Mathematica are used to prove polynomial identities that are essential to obtain growth estimates for subdiagonal rational Pade approximations of the exponential function and to obtain new estimates of the constants of the Brenner-Thomee Approximation Theorem of Semigroup Theory.

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