Digital Commons Network^™

210po And 210pb As Tracers Of Particle Cycling And Export In The Western Arctic Ocean, Wokil Bam, Kanchan Maiti, Mark Baskaran

Faculty Publications

The distribution and vertical fluxes of particulate organic carbon and other key elements in the Arctic Ocean are primarily governed by the spatial and seasonal changes in primary productivity, areal extent of ice cover, and lateral exchange between the shelves and interior basins. The Arctic Ocean has undergone rapid increase in primary productivity and drastic decrease in the areal extent of seasonal sea ice in the last two decades. These changes can greatly influence the biological pump as well as associated carbon export and key element fluxes. Here, we report the export of particulate organic and inorganic carbon, particulate nitrogen …

Site Selection For Coral Reef Restoration Using Airborne Imaging Spectroscopy, Steven R. Schill, Gregory P. Asner, Valerie Pietsch Mcnulty, F. Joseph Pollock, Aldo Croquer, Nicholas R. Vaughn, Ximena Escovar-Fadul, George Raber, Elizabeth Shaver

Faculty Publications

Over the past decade, coral restoration efforts have increased as reefs continue to decline at unprecedented rates. Identifying suitable coral outplanting locations to maximize coral survival continues to be one of the biggest challenges for restoration practitioners. Here, we demonstrate methods of using derivatives from imaging spectroscopy from the Global Airborne Observatory (GAO) to identify suitable coral outplant sites and report on the survival rates of restored coral at those sites. Outplant sites for a community-based, citizen science outplant event in Bávaro, Dominican Republic, were identified using expert-defined criteria applied to a suitability model from data layers derived from airborne …

On The Relationship Between Frequency, Features, And Markedness In Inflection: Experimental Evidence From Russian Nouns, Jeffrey R. Parker

Faculty Publications

Markedness has a long tradition in linguistics as a way to describe linguistic asymmetries. In this paper, I investigate an argument about the necessity of markedness as a tool for capturing the structural distribution of inflectional affixes and predicting the behavioral consequences of that distribution. Based on evidence from German adjectives, Clahsen et al. argue that the number of specified features of inflectional affixes (which I argue represents a type of markedness) affects reaction times in lexical access. Affixes’ features, however, overlap with how frequently they occur. Clahsen et al. investigate only three affixes in German, leaving open questions about …

The Percentage Of Trees Bearing Cones As A Predictor For Annual Longleaf Pine Cone Production, Thomas Patterson

Faculty Publications

The U.S. Forest Service has monitored longleaf pine cone production at sites throughout the southeastern United States for over 60 years. Data from the multi-decadal surveys have supported our understanding of the variability of stand-level cone production as it relates to environmental and ecological processes, and more broadly, how longleaf pine operates as a masting species. Cones from longleaf pine are counted each spring using visual surveys that follow a standard protocol. Rapid mast assessments have been proposed in the literature as an alternative to traditional methods, yet these approaches have not been examined for longleaf pine. In this study, …

Mitochondrial Genome Of Geomydoecus Aurei, A Pocket-Gopher Louse, Theresa A. Spradling, Alexandra C. Place, Ashley L. Campbell, James W. Demastes

Faculty Publications

Parasitic lice demonstrate an unusual array of mitochondrial genome architectures and gene arrangements. We characterized the mitochondrial genome of Geomydoecus aurei, a chewing louse (Phthiraptera: Trichodectidae) found on pocket gophers (Rodentia: Geomyidae) using reads from both Illumina and Oxford Nanopore sequencing coupled with PCR, cloning, and Sanger sequencing to verify structure and arrangement for each chromosome. The genome consisted of 12 circular mitochondrial chromosomes ranging in size from 1,318 to 2,088 nucleotides (nt). Total genome size was 19,015 nt. All 37 genes typical of metazoans (2 rRNA genes, 22 tRNA genes, and 13 protein-coding genes) were present. An average …

Exploring How Exposure To Truth And State-Sponsored Anti-Tobacco Media Campaigns Affect Smoking Disparities Among Young Adults Using A National Longitudinal Dataset, 2002-2017, David C. Colston, Yanmei Xie, Jim Thrasher Ph.D.,Ma. Ms, Sherry Emery, Megan E. Patrick, Andrea R. Titus, Micheal R. Elliot, Nancy L. Fleischer

Faculty Publications

Background. Little is known regarding long-term impacts of anti-tobacco media campaigns on youth smoking and related disparities in the United States. Methods. We examined longitudinal cohort data from Monitoring the Future (MTF) between 2000 and 2017 in modified Poisson regression models to understand the long-term impacts of televised Truth and state-sponsored ad campaign exposure at baseline (age 18) on first cigarette and daily smoking initiation 1 to 2 years later (at modal ages 19/20). We also used additive interactions to test for potential effect modification between campaign exposure and smoking outcomes by sex, race/ethnicity, and parental educational attainment. Results. We …

Knowledge, Attitude, And Practice Of Orthopedic Manual Physical Therapists Toward Lifestyle Screening And Education: A Descriptive Study, Jillian M. Zollinger, Sozina Katuli

Faculty Publications

Introduction. Lifestyle-focused rehabilitation plans need to become part of the standard system of care for the treatment of chronic diseases. To achieve this goal, the KAP of rehabilitation professionals toward lifestyle medicine needs to be understood. This study investigated the niche of orthopedic manual physical therapy and is purposed as a foundational model for continued research. Method. A survey instrument was designed to investigate the KAP of orthopedic manual physical therapists toward lifestyle screening and education. Results. There were 155 participants of which 58.1-72.3% reported frequently talking to their patients about lifestyle topics, while 78.1-80.6% felt highly confident and competent …

Spoken Word Learning In Children With Developmental Language Disorder Or Dyslexia, Suzanne M. Adlof, Lauren S. Baron, Bethany A. Bell, Joanna Scoggins

Faculty Publications

Purpose Word learning difficulties have been documented in multiple studies involving children with dyslexia and developmental language disorder (DLD; see also specific language impairment). However, no previous studies have directly contrasted word learning in these two frequently co-occurring disorders. We examined word learning in second-grade students with DLD-only and dyslexia-only as compared to each other, peers with both disorders (DLD + dyslexia), and peers with typical development. We hypothesized that children with dyslexia-only and DLD-only would show differences in word learning due to differences in their core language strengths and weaknesses. Method Children ( = 244) were taught eight novel …

Flat Topological Bands And Eigenstate Criticality In A Quasiperiodic Insulator, Yixing Fu, Justin H. Wilson, J. H. Pixley

Faculty Publications

The effects of downfolding a Brillouin zone can open gaps and quench the kinetic energy by flattening bands. Quasiperiodic systems are extreme examples of this process, which leads to new phases and critical eigenstates. We analytically and numerically investigate these effects in a two-dimensional topological insulator with a quasiperiodic potential and discover a complex phase diagram. We study the nature of the resulting eigenstate quantum phase transitions; a quasiperiodic potential can make a trivial insulator topological and induce topological insulator-to-metal phase transitions through a unique universality class distinct from random systems. This wealth of critical behavior occurs concomitantly with the …

Dynamical Mean-Field Theory Of The Anderson-Hubbard Model With Local And Nonlocal Disorder In Tensor Formulation, A. Weh, Y. Zhang, A. Östlin, H. Terletska, D. Bauernfeind, K. M. Tam, H. G. Evertz, K. Byczuk, D. Vollhardt, L. Chioncel

Faculty Publications

To explore correlated electrons in the presence of local and nonlocal disorder, the Blackman-Esterling-Berk method for averaging over off-diagonal disorder is implemented into dynamical mean-field theory using tensor notation. The impurity model combining disorder and correlations is solved using the recently developed fork tensor-product state solver, which allows one to calculate the single particle spectral functions on the real-frequency axis. In the absence of off-diagonal hopping, we establish exact bounds of the spectral function of the noninteracting Bethe lattice with coordination number . In the presence of interaction, the Mott insulating paramagnetic phase of the one-band Hubbard model is computed …

Investigation And Statistical Modeling Of The Mechanical Properties Of Additively Manufactured Lattices, Derek G. Spear, Anthony N. Palazotto

Faculty Publications

This paper describes the background, test methodology, and experimental results associated with the testing and analysis of quasi-static compression testing of additively manufactured open-cell lattice structures. The study aims to examine the effect of lattice topology, cell size, cell density, and surface thickness on the mechanical properties of lattice structures. Three lattice designs were chosen, the Diamond, I-WP, and Primitive Triply Periodic Minimal Surfaces (TPMSs). Uniaxial compression tests were conducted for every combination of the three lattice designs, three cell sizes, three cell densities, and three surface thicknesses. In order to perform an efficient experiment and gain the most information …

Eating Competence And Dietary Intake Of Sexual And Gender Minority College Students, Sara Murphy, Jesse Stabile Morrell

Faculty Publications

Sexual and gender minority college students are underrepresented in nutrition research and may face unique challenges related to eating which impact their overall diet quality. We assessed the differences in eating competence and dietary intake between sexual and gender minority (SGM) and cisgender heterosexual (CH) college students. Participants (n = 2645) reported sexual orientation, gender identity and completed the Eating Competence Satter Inventory (ecSI 2.0™ through an online questionnaire. Three-day food records examined dietary intake. Intake was compared to recommendations for nutrients of public health concern. Chi-square and ANCOVA examined differences between eating competence and dietary intake. There were no …

Medication Adherence Reminder System For Virtual Home Assistants: Mixed Methods Evaluation Study, Cythnia F. Corbett, Elizabeth M. Combs, Peyton S. Chandarana, Isabel Stringfellow, Karen Worthy, Thien Nguyen, Pamela J. Wright Phd, Ms, Med, Rn, Cen, Jason M. O'Kane

Faculty Publications

Background: Medication nonadherence is a global public health challenge that results in suboptimal health outcomes and increases health care costs. Forgetting to take medicines is one of the most common reasons for unintentional medication nonadherence. Research findings indicate that voice-activated virtual home assistants, such as Amazon Echo and Google Home devices, may be useful in promoting medication adherence.

Objective: This study aims to create a medication adherence app (skill), MedBuddy, for Amazon Echo devices and measure the use, usability, and usefulness of this medication-taking reminder skill.

Methods: A single-group, mixed methods, cohort feasibility study was conducted with women who took …

Andrographolide Attenuates Gut-Brain-Axis Associated Pathology In Gulf War Illness By Modulating Bacteriome-Virome Associated Inflammation And Microglia-Neuron Proinflammatory Crosstalk, Punnag Saha, Peter T. Skidmore, Larinda A. Holland, Ayan Mondal, Dipro Bose, Ratanesh K. Seth, Kimberly Sullivan, Patricia A. Janulewicz, Ronnie Horner, Nancy Klimas, Mitzi Nagarkatti, Prakash Nagarkatti, Efrem S. Lim, Saurabh Chatterjee

Faculty Publications

Gulf War Illness (GWI) is a chronic multi-symptomatic illness that is associated with fatigue, pain, cognitive deficits, and gastrointestinal disturbances and presents a significant challenge to treat in clinics. Our previous studies show a role of an altered Gut-Brain axis pathology in disease development and symptom persistence in GWI. The present study utilizes a mouse model of GWI to study the role of a labdane diterpenoid andrographolide (AG) to attenuate the Gut-Brain axis-linked pathology. Results showed that AG treatment in mice (100 mg/kg) via oral gavage restored bacteriome alterations, significantly increased probiotic bacteria , , and , the genera that …

Effects Of Beach Nourishment Project On Coastal Geomorphology And Mangrove Dynamics In Southern Louisiana, Usa, Marcelo Cancela Lisboa Cohen, Adriana Vivan De Souza, Kam-Biu Liu, Erika Rodrigues, Qiang Yao, Luiz Carlos Ruiz Pessenda, Dilce Rossetti, Junghyung Ryu, Marianne Dietz

Faculty Publications

No abstract provided.

High-Throughput Computation Of New Carbon Allotropes With Diverse Hybridization And Ultrahigh Hardness, Mohammed Al-Fahdi, Alejandro Rodriguez, Tao Ouyang, Ming Hu

Faculty Publications

The discovery of new carbon allotropes with different building blocks and crystal symmetries has long been of great interest to broad materials science fields. Herein, we report several hundred new carbon allotropes predicted by the state-of-the-art RG² code and first-principles calculations. The types of new carbon allotropes that were identified in this work span pure sp² , hybrid sp²/sp³ , and pure sp³ C–C bonding. All structures were globally optimized at the first-principles level. The thermodynamic stability of some selected carbon allotropes was further validated by computing their phonon dispersions. The predicted carbon allotropes …

Memory Reduction Using A Ring Abstraction Over Gpu Rdma For Distributed Quantum Monte Carlo Solver, Weile Wei, Eduardo D'Azevedo, Kevin Huck, Arghya Chatterjee, Oscar Hernandez, Hartmut Kaiser

Faculty Publications

Scientific applications that run on leadership computing facilities often face the challenge of being unable to fit leading science cases onto accelerator devices due to memory constraints (memory-bound applications). In this work, the authors studied one such US Department of Energy mission-critical condensed matter physics application, Dynamical Cluster Approximation (DCA++), and this paper discusses how device memory-bound challenges were successfully reduced by proposing an effective "all-to-all"communication method - -a ring communication algorithm. This implementation takes advantage of acceleration on GPUs and remote direct memory access (RDMA) for fast data exchange between GPUs. Additionally, the ring algorithm was optimized with sub-ring …

Analyzing Satellite Ocean Color Match-Up Protocols Using The Satellite Validation Navy Tool (Savant) At Moby And Two Aeronet-Oc Sites, Adam Lawson, Jennifer Bowers, Sherwin Ladner, Richard Crout, Christopher Wood, Robert Arnone, Paul Martinolich, David Lewis

Faculty Publications

The satellite validation navy tool (SAVANT) was developed by the Naval Research Laboratory to help facilitate the assessment of the stability and accuracy of ocean color satellites, using numerous ground truth (in situ) platforms around the globe and support methods for match-up protocols. The effects of varying spatial constraints with permissive and strict protocols on match-up uncertainty are evaluated, in an attempt to establish an optimal satellite ocean color calibration and validation (cal/val) match-up protocol. This allows users to evaluate the accuracy of ocean color sensors compared to specific ground truth sites that provide continuous data. Various match-up constraints may …

Classical And Neural Network Machine Learning To Determine The Risk Of Marijuana Use, Laura Zoboroski, Torrey J. Wagner, Brent T. Langhals

Faculty Publications

Marijuana is the most commonly abused drug for military personnel tested at the Air Force Drug Testing Laboratory. A publicly available dataset of drug use, personality trait scores and demographic data was modeled with logistic regression, decision tree and neural network models to determine the extent to which marijuana use can be predicted using personality traits. While the logistic regression model had lower performance than the neural network model, it matched the sensitivity of prior work (0.80), achieved a high level of significance (p < 0.05) and yielded valuable inferences. It implied that younger, less educated individuals who exhibit sensation-seeking behavior and are open to experience tend to be at higher risk for THC use. A method for performing an iterative multidimensional neural network hyperparameter search is presented, and two iterations of a 6-dimensional search were performed. Metrics were used to select a family of 8 promising models from a cohort of 4600 models, and the best NN model’s 0.87 sensitivity improved upon the literature. The model met an f1 overfitting threshold on the test and holdout datasets, and an accuracy sensitivity analysis on a holdout-equivalent dataset yielded a 95% CI of 0.86 ± 0.04. These results have the potential to increase the efficacy of drug prevention and intervention programs.

Do Neighbours Matter? The Effect Of Single‐ And Mixed‐Species Sowing Density On Seed Germination Of Annual Wetland Plants, Francielli Bao, Davi Rodrigo Rossatto, Arnildo Pott, Tracy Elsey‐Quirk, Marco Antonio Assis, Rafael Arruda, Desirée Marques Ramos, Borja Jiménez‐Alfaro

Faculty Publications

No abstract provided.

Phylogenomic Analyses Reveal Non-Monophyly Of The Antbird Genera Herpsilochmus And Sakesphorus (Thamnophilidae), With Description Of A New Genus For Herpsilochmus Sellowi, G A. Bravo, B M. Whitney, R Belmonte-Lopes, M R. Bornschein, G A. Bravo, R Beco, J Battilana, L N. Naka, A Aleixo, M R. Pie, L F. Silveira, E P. Derryberry, R T. Brumfield

Faculty Publications

The family Thamnophilidae is a species-rich Neotropical radiation of passerine birds. Current classification of its 235 species is mostly based on morphological similarities, but recent studies integrating comprehensive phenotypic and phylogenetic data have redefined taxonomic limits of several taxa. Here, we assess generic relationships of Herpsilochmus, Sakesphorus, Thamnophilus, Biatas, and Dysithamnus using DNA sequences from the mitochondrion, nuclear exons, and ultraconserved elements, with further attention to interspecific relationships within Herpsilochmus. We show that Herpsilochmus and Sakesphorus are not monophyletic. We resolve Herpsilochmus sellowi as a deep-branch sister to the monotypic genus Biatas and Sakesphorus cristatus as sister to a clade …

Ligo Detector Characterization In The Second And Third Observing Runs, D. Davis, J. S. Areeda, B. K. Berger, R. Bruntz, A. Effler, R. C. Essick, R. P. Fisher, P. Godwin, E. Goetz, A. F. Helmling-Cornell, B. Hughey, E. Katsavounidis, A. P. Lundgren, D. M. Macleod, Z. Márka, T. J. Massinger, A. Matas, J. Mciver, G. Mo, K. Mogushi, P. Nguyen, L. K. Nuttall, R. M.S. Schofield, D. H. Shoemaker, S. Soni, A. L. Stuver, A. L. Urban, G. Valdes, M. Walker, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, Y. Asali, S. M. Aston, C. Austin, A. M. Baer, M. Ball, S. W. Ballmer, S. Banagiri, D. Barker, C. Barschaw, L. Barsotti, J. Bartlett, J. Betzwieser, R. Beda, D. Bhattacharjee, J. Bidler, G. Billingsley, S. Biscans, J. Bidler, G. Billingsley, S. Biscans, C. D. Blair, R. M. Blair, N. Bode, P. Booker, R. Bork, A. Bramley, A. F. Brooks, D. D. Brown, A. Buikema, C. Cahillane, T. A. Callister, G. Caneva Santoro, K. C. Cannon, J. Carlin, K. Chandra, X. Chen, N. Christensen, A. A. Ciobanu, F. Clara, C. M. Compton, S. J. Cooper, K. R. Corley, M. W. Coughlin, S. T. Countryman, P. B. Covas, D. C. Coyne, S. G. Crowder, T. Dal Canton, B. Danila, L. E. H. Datrier, G. S. Davies, T. Dent, N. A. Didio, C. Di Fronzo, K. L. Dooley, J. C. Driggers, P. Dupej, S. E. Dwyer, T. Etzel, M. Evans, T. M. Evans, S. Fairhurst, J. Feicht, A. Fernandez-Galiana, R. Frey, P. Fritschel, V. V. Frolov, P. Fulda, M. Fyffe, B. U. Gadre, J. A. Giaime, K. D. Giardina, G. Gonzalez, S. Gras, C. Gray, A. C. Green, A. Gupta, E. K. Gustafson, R. Gustafson, J. Hanks, J. Hanson, T. Hardwick, I. W. Harry, R. K. Hasskew, M. C. Heintze, J. Heinzel, N. A. Holland, I. J. Hollows, C. G. Hoy, S. Hughey, S. P. Jadhav, K. Janssens, G. Johns, J. D. Jones, S. Kandhasamy, S. Karki, M. Kasprzak, K. Kawabe, D. Keitel, N. Kijbuchoo, Y. M. Kim, P. J. King, J. S. Kissel, S. Kulkarni, R. Kumar, M. Landry, B. B. Lane, B. Lantz, M. Laxen, Y. K. Lecoeuche, J. Leviton, J. Liu, M. Lormand, R. Macas, A. Macedo, M. Macinnis, V. Mandic, G. L. Mansell, S. Marka, B. Martinez, K. Martinovic, D. V. Martynov, K. Mason, F. Matichard, N. Mavalvala, R. Mccarthy, D. E. Mcclelland, S. Mccormick, L. Mcculler, C. Mcisaac, T. Mcrae, G. Mendell, K. Merfeld, E. L. Merilh, P. M. Meyers, F. Meylahn, I. Michaloliakos, H. Middleton, J. C. Mills, T. Mistry, R. Mittleman, G. Moreno, C. M. Mow- Lowry, S. Mozzon, L. Mueller, N. Mukund, A. Mullavey, J. Muth, T. J. N. Nelson, A. Neunzert, S. Nichols, E. Nitoglia, J. Oberling, J. J. Oh, S. H. Oh, R. J. Oram, R. G. Ormiston, N. Ormsby, C. Osthelder, D. J. Ottaway, H. Overmier, A. Pai, J. R. Palamos, F. Pannarale, W. Parker, O. Patane, M. Patel, E. Payne, A. Pele, R. Penhorwood, C. J. Perez, K. S. Phukon, M. Pillas, M. Pirello, H. Radkins, K. E. Ramirez, J. W. Richardson, K. Riles, K. Rink, N. A. Robertson, J. G. Rollins, C. L. Romel, J. H. Romie, M. P. Ross, K. Ryan, T. Sadecki, M. Sakellariadou, E. J. Sanchez, L. E. Sanchez, L. Sandles, T. R. Saravanan, R. L. Savage, D. Schaetzl, R. Schnabel, E. Schwartz, D. Sellers, T. Shaffer, D. Sigg, A. M. Sintes, B. J. J. Slagmolen, J. R. Smith, K. Soni, B. Sorazu, A. P. Spencer, K. A. Strain, D. Strom, L. Sun, M. J. Szczepanczyk, J. Tasson, R. Tenorio, M. Thomas, P. Thomas, K. A. Thorne, K. Toland, C. I. Torrie, A. Tran, G. Traylor, M. Trevor, M. Tse, G. Vajente, N. Van Remortel, D. C. Vander-Hyde, A. Vargas, J. Veitch, P. J. Veitch, K. Venkateswara, G. Venugopalan, A. D. Viets, V. Villa-Ortega, T. Vo, C. Vorvick, M. Wade, G. S. Wallace, R. L. Ward, J. Warner, B. Weaver, A. J. Weinstein, R. Weiss, K. Wette, D. D. White, L. V. White, C. Whittle, A. R. Williamson, B. Willke, C. C. Wipf, L. Xiao, R. Xu, H. Yamamoto, H. Yu, H. Yu, L. Zhang, Y. Zheng, M. E. Zucker, J. Zweizig

Faculty Publications

The characterization of the Advanced LIGO detectors in the second and third observing runs has increased the sensitivity of the instruments, allowing for a higher number of detectable gravitational-wave signals, and provided confirmation of all observed gravitational-wave events. In this work, we present the methods used to characterize the LIGO detectors and curate the publicly available datasets, including the LIGO strain data and data quality products. We describe the essential role of these datasets in LIGO–Virgo Collaboration analyses of gravitational-waves from both transient and persistent sources and include details on the provenance of these datasets in order to support analyses …

Comparative Antennal Morphometry And Sensilla Organization In The Reproductive And Non-Reproductive Castes Of The Formosan Subterranean Termite, Paula Castillo, Nathan Le, Qian Sun

Faculty Publications

Antennae are the primary sensory organs in insects, where a variety of sensilla are distributed for the perception of the chemical environment. In eusocial insects, colony function is main-tained by a division of labor between reproductive and non-reproductive castes, and chemosensation is essential for regulating their specialized social activities. Several social species in Hymenoptera display caste-specific characteristics in antennal morphology and diversity of sensilla, reflecting their differential tasks. In termites, however, little is known about how the division of labor is associated with chemosensory morphology among castes. Using light and scanning electron microscopy, we performed antennal morphometry and characterized the …

Changes In The Microbial Community In Soybean Plots Treated With Biochar And Poultry Litter, Rosalie B. Calderon, Changyoon Jeong, Hyun Hwoi Ku, Lyndon M. Coghill, Young Jeong Ju, Nayong Kim, Jong Hyun Ham

Faculty Publications

The application of organic materials that promote beneficial microbial activity is vital to maintaining soil health and crop productivity. We investigated the effect on the soil microbiome of applying biochar (BC), poultry litter (PL), and a combination of biochar and poultry litter (BC/PL) in soybean cultivation at the Red River Research Station (Bossier City, LA, USA). We characterized the microbial profiles, community structure, and co-occurrence network from sequencing data to infer microbial interactions in the soil samples collected in the first and second years of each soil treatment (2016 and 2017, respectively). Our results showed that soil treatments with BC, …

Relating Dust Reference Models To Conventional Systems In Manifestly Gauge Invariant Perturbation Theory, Kristina Giesel, Bao-Fei Li, Parampreet Singh

Faculty Publications

Models with dust reference fields in relational formalism have proved useful in understanding the construction of gauge invariant perturbation theory to arbitrary orders in the canonical framework. These reference fields modify the dynamical equations for perturbation equations. However, important questions remain open on the relation with conventional perturbation theories of inflaton coupled to gravity and of multifluid systems, and on understanding modifications in terms of physical degrees of freedom. These gaps are filled in this manuscript for Brown-Kuchar and Gaussian dust models, both of which involve three scalar physical degrees of freedom. We establish a relationship of these models with …

Octo-Tiger: A New, 3d Hydrodynamic Code For Stellar Mergers That Uses Hpx Parallelization, Dominic C. Marcello, Sagiv Shiber, Orsola De Marco, Juhan Frank, Geoffrey C. Clayton, Patrick M. Motl, Patrick Diehl, Hartmut Kaiser

Faculty Publications

OCTO-TIGER is an astrophysics code to simulate the evolution of self-gravitating and rotating systems of arbitrary geometry based on the fast multipole method, using adaptive mesh refinement. OCTO-TIGER is currently optimized to simulate the merger of well-resolved stars that can be approximated by barotropic structures, such as white dwarfs (WDs) or main-sequence stars. The gravity solver conserves angular momentum to machine precision, thanks to a 'correction' algorithm. This code uses firx parallelization, allowing the overlap of work and communication and leading to excellent scaling properties, allowing for the computation of large problems in reasonable wall-clock times. In this paper, we …

The Aortic-Femoral Arterial Stiffness Gradient: An Atherosclerosis Risk In Communities (Aric) Study, Keeron Stone, Simon Fryer, Michelle L. Meyer, Anna Kucharska-Newton, James Faulkner, Gabriel Zieff, Craig Paterson, Daniel Credeur, Kunihiro Matsushita, Timothy M. Hughes, Hirofumi Tanaka, Lee Stoner

Faculty Publications

Background: The aortic to femoral arterial stiffness gradient (af-SG) may be a novel measure of arterial health and cardiovascular disease (CVD) risk, but its association with CVD risk factors and CVD status, and whether or not they differ from the referent measure, carotid-femoral pulse-wave velocity (cfPWV), is not known.

Method: Accordingly, we compared the associations of the af-SG and cfPWV with (i) age and traditional CVD risk factors and (ii) CVD status. We evaluated 4183 older-aged (75.2 ± 5.0 years) men and women in the community-based Atherosclerosis Risk in Communities (ARIC) Study. cfPWV and femoral-ankle PWV (faPWV) were …

Environmental Noise In Advanced Ligo Detectors, P. Nguyen, R. M.S. Schofield, A. Effler, C. Austin, V. Adya, M. Ball, S. Banagiri, K. Banowetz, C. Billman, C. D. Blair, A. Buikema, C. Cahillane, F. Clara, P. B. Covas, G. Dalya, C. Daniel, B. Dawes, R. Derosa, S. E. Dwyer, R. Frey, V. V. Frolov, D. Ghirado, E. Goetz, T. Hardwick, A. F. Helmling-Cornell, I. J. Hollows, N. Kijbunchoo, J. Kruk, M. Laxen, E. Maaske, G. L. Mansell, R. Mccarthy, K. Merfeld, A. Neunzert, J. R. Palamos, W. Parker, B. Pearlstone, A. Pele, H. Radkins, V. Roma, R. L. Savage, P. Schale, D. Shoemaker, T. Shoemaker, S. Soni, D. Talukder, M. Tse, G. Valdes, M. Vidreo, C. Vorvick, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, A. M. Baer, S. W. Ballmer, D. Barker, L. Barsotti, J. Bartlett, B. K. Berger, J. Betzwieser, D. Bhattacharjee, G. Billingsley, S. Biscans, R. M. Blair, N. Bode, P. Booker, R. Bork, A. Bramley, A. F. Brooks, D. D. Brown, K. C. Cannon, X. Chen, A. A. Ciobanu, S. J. Cooper, C. M. Compton, K. R. Corley, S. T. Countryman, D. C. Coyne, L. E. H. Datrier, D. Davis, C. Di Fronzo, K. L. Dooley, J. C. Driggers, P. Dupej, T. Etzel, M. Evans, T. M. Evans, J. Feicht, A. Fernandez-Galiana, P. Fritschel, P. Fulda, M. Fyffe, J. A. Giaime, K. D. Giardina, P. Godwin, S. Gras, C. Gray, R. Gray, A. C. Green, E. K. Gustafson, R. Gustafson, J. Hanks, J. Hanson, R. H. Hasskew, M. C. Heintze, N. A. Holland, J. D. Jones, S. Kandhasamy, S. Karki, M. Kasparzack, K. Kawabe, P. J. King, J. S. Kissel, R. Kumar, M. Landry, B. B. Lane, B. Lantz, Y. K. Lecoeuche, J. Leviton, J. Liu, M. Lormand, A. P. Lundgren, R. Macas, M. Macinnis, D. M. Macleod, S. Marka, Z. Marka, D. V. Martynov, K. Mason, T. J. Massinger, F. Matichard, N. Mavalvala, D. E. Mcclelland, S. Mccormick, L. Mcculler, J. Mciver, T. Mcrae, G. Mendell, E. L. Merilh, F. Meylahn, P. M. Meyers, T. Mistry, R. Mitteman, G. Moreno, C. M. Mow-Lowry, S. Mozzon, A. Mullavey, T. J. N. Nelson, L. K. Nuttall, J. Oberling, R. J. Oram, C. Osthelder, D. J. Ottaway, H. Overmier, E. Payne, R. Penhorwood, C. J. Perez, M. Pirello, K. E. Ramirez, J. W. Richardson, K. Riles, N. A. Robertson, J. G. Rollins, C. L. Romel, J. H. Romie, M. P. Ross, K. Ryan, T. Sadecki, E. J. Sanchez, L. E. Sanchez, T. R. Saravanan, D. Schaetzl, R. Schnabel, E. Schwartz, D. Sellers, T. Shaffer, D. Sigg, B. J. J. Slagmolen, J. R. Smith, B. Sorazu, A. P. Spencer, K. A. Strain, L. Sun, M. J. Szczepanczyk, M. Thomas, P. Thomas, K. A. Thorne, K. Toland, C. I. Torrie, G. Traylor, A. L. Urban, G. Vajente, D. C. Bander-Hyde, P. J. Veitch, K. Venkateswara, G. Venugopalan, A. D. Viets, T. Vo, M. Wade, R. L. Ward, J. Warner, B. Weaver, R. Weiss, C. Whittle, B. Willke, C. C. Wipf, L. Xiao, H. Yamamoto, H. Yu, L. Zhang, M. E. Zucker, J. Zweizig

Faculty Publications

The sensitivity of the advanced LIGO detectors to gravitational waves can be affected by environmental disturbances external to the detectors themselves. Since the transition from the former initial LIGO phase, many improvements have been made to the equipment and techniques used to investigate these environmental effects. These methods have aided in tracking down and mitigating noise sources throughout the first three observing runs of the advanced detector era, keeping the ambient contribution of environmental noise below the background noise levels of the detectors. In this paper we describe the methods used and how they have led to the mitigation of …

Breeding Ecology Of Mottled Ducks: A Review, Elizabeth S. Bonczek, Kevin M. Ringelman

Faculty Publications

Mottled ducks (Anas fulvigula) are endemic to the Gulf Coast of North America, and their range stretches from Alabama to the Laguna Madre of Mexico, with a distinct population in peninsular Florida and an introduced population in South Carolina. As one of the few non-migratory ducks in North America, mottled ducks depend on a variety of locally available habitat throughout the annual cycle, and threats to these landscapes may affect mottled ducks more acutely than migratory species. Annual population monitoring has revealed declines in mottled duck populations in Texas and Louisiana since 2008, and the genetic integrity of the Florida …

Stable Isotope Analyses Identify Trophic Niche Partitioning Between Sympatric Terrestrial Vertebrates In Coastal Saltmarshes With Differing Oiling Histories, Sydney Moyo, Hayat Bennadji, Danielle Laguaite, Anna A. Pérez-Umphrey, Allison M. Snider, Andrea Bonisoli-Alquati, Jill A. Olin, Philip C. Stouffer, Sabrina S. Taylor, Paola C. López-Duarte, Brian J. Roberts, Linda Hooper-Bui, Michael J. Polito

Faculty Publications

Bioindicator species are commonly used as proxies to help identify the ecological effects of oil spills and other stressors. However, the utility of taxa as bioindicators is dependent on understanding their trophic niche and life history characteristics, as these factors mediate their ecological responses. Seaside sparrows (Ammospiza maritima) and marsh rice rats (Oryzomys palustris) are two ubiquitous terrestrial vertebrates that are thought to be bioindicators of oil spills in saltmarsh ecosystems. To improve the utility of these omnivorous taxa as bioindicators, we used carbon and nitrogen stable isotope analysis to quantify their trophic niches at saltmarshes in coastal Louisiana with …