Digital Commons Network^™

Effect Of Ldh On The Dissolution And Adsorption Behaviors Of Sulfate In Portland Cement Early Hydration Process, Zedong Qiu, Limin Deng, Shuang Lu, Guoqiang Li, Zhen Tang

Faculty Publications

In recent years, it has been widely recognized that the incorporation of Mg-Al-LDH into cement-based materials can improve the salt corrosion resistance of cement-based materials. The reason for the improvement comes from the anion adsorption capacity of Mg-Al-LDH. It was confirmed that the addition of Mg-Al-LDH would accelerate the setting and hardening of cement paste. With the increase in the Mg-Al-LDH content, the initial setting time of cement slurry with different gypsum contents will decrease by 10-50% and the viscosity of the cement slurry will increase by 100-200%. Depending on different gypsum contents, the degree of cement hydration varied. This …

Decay Of Oil Residues In The Soil Is Enhanced By The Presence Of Spartina Alterniflora, With No Additional Effect From Microbiome Manipulation, Stephen K. Formel, Allyson M. Martin, John H. Pardue, Vijaikrishnah Elango, Kristina Johnson, Claudia K. Gunsch, Emilie Lefèvre, Paige M. Varner, Yeon Ji Kim, Brittany M. Bernik, Sunshine A. Van Bael

Faculty Publications

Recent work has suggested that the phytoremediation potential of S. alterniflora may be linked to a selection by the plant for oil-degrading microbial communities in the soil, in combination with enhanced delivery of oxygen and plant enzymes to the soil. In salt marshes, where the soil is saline and hypoxic, this relationship may be enhanced as plants in extreme environments have been found to be especially dependent on their microbiome for resilience to stress and to respond to toxins in the soil. Optimizing methods for restoration of oiled salt marshes would be especially meaningful in the Gulf of Mexico, where …

Classification Of Surface Pavement Cracks As Top-Down, Bottom-Up, And Cement-Treated Reflective Cracking Based On Deep Learning Methods, Nirmal Dhakal, Mostafa A. Elseifi, Zia U.A. Zihan, Zhongjie Zhang, Christophe N. Fillastre, Jagannath Upadhyay

Faculty Publications

The treatment and repair strategies for reflective and fatigue cracking that initiate at the pavement surface (i.e., top-down cracking) and at the bottom of the asphalt concrete layer (i.e., bottom-up cracking) are noticeably different. However, pavement management engineers are facing difficulties in identifying these cracks in the field because they usually appear in visually identical patterns. The objective of this study was to develop artificial neural network (ANN) and convolutional neural network (CNN) applications to differentiate and classify top-down, bottom-up, and cement-treated reflective cracking in in-service flexible pavements using deep-learning models. The developed CNN model achieved an accuracy of 93.8% …

Multiple-Inputs Convolutional Neural Network For Covid-19 Classification And Critical Region Screening From Chest X-Ray Radiographs: Model Development And Performance Evaluation, Zhongqiang Li, Zheng Li, Luke Yao, Qing Chen, Jian Zhang, Xin Li, Ji Ming Feng, Yanping Li, Jian Xu

Faculty Publications

Background: The COVID-19 pandemic is becoming one of the largest, unprecedented health crises, and chest X-ray radiography (CXR) plays a vital role in diagnosing COVID-19. However, extracting and finding useful image features from CXRs demand a heavy workload for radiologists. Objective: The aim of this study was to design a novel multiple-inputs (MI) convolutional neural network (CNN) for the classification of COVID-19 and extraction of critical regions from CXRs. We also investigated the effect of the number of inputs on the performance of our new MI-CNN model. Methods: A total of 6205 CXR images (including 3021 COVID-19 CXRs and 3184 …

From Merging Frameworks To Merging Stars: Experiences Using Hpx, Kokkos And Simd Types, Gregor Dais, Srinivas Yadav Singanaboina, Patrick Diehl, Hartmut Kaiser, Dirk Pfluger

Faculty Publications

Octo-Tiger, a large-scale 3D AMR code for the merger of stars, uses a combination of HPX, Kokkos and explicit SIMD types, aiming to achieve performance-portability for a broad range of heterogeneous hardware. However, on A64FX CPUs, we encountered several missing pieces, hindering performance by causing problems with the SIMD vectorization. Therefore, we add std:experimental:simd as an option to use in Octo-Tiger's Kokkos kernels alongside Kokkos SIMD, and further add a new SVE (Scalable Vector Extensions) SIMD backend. Additionally, we amend missing SIMD implementations in the Kokkos kernels within Octo-Tiger's hydro solver. We test our changes by running Octo-Tiger on three …

Accuracy Of A Sacral Drilling With A Custom 3d Printed Drilling Guide Or Free-Hand Technique In Canine Experimental Sacroiliac Luxation, Daniel Mccarthy

LSU Master's Theses

ABSTRACT

The objective of this study was to improve the accuracy of drilling during the repair of sacroiliac luxation with a 3D-printed patient-specific drill guide (3D-GDT) compared to free-hand drilling technique (FHDT). A blinded, randomized, prospective study was performed including sixteen canine cadavers (20-25 kg) euthanized for reasons not related to the study. Dorsal, bilateral, sacroiliac luxations (SILs) were created experimentally. A pelvic CT was performed pre- and post-drilling. The FHDT was drilled followed by 3D-GDT for each sacrum. CT and 3D measurements of craniocaudal and dorsoventral angles were compared between FHDT and 3D-GDT, as well as deviations of entry …

Magnetic Weyl Semimetallic Phase In Thin Films Of Eu2ir2 O7, Xiaoran Liu, Shiang Fang, Yixing Fu, Wenbo Ge, Mikhail Kareev, Jong Woo Kim, Yongseong Choi, Evguenia Karapetrova, Qinghua Zhang, Lin Gu, Eun Sang Choi, Fangdi Wen, Justin H. Wilson, Gilberto Fabbris, Philip J. Ryan, John W. Freeland, Daniel Haskel, Weida Wu, J. H. Pixley, Jak Chakhalian

Faculty Publications

The interplay between electronic interactions and strong spin-orbit coupling is expected to create a plethora of fascinating correlated topological states of quantum matter. Of particular interest are magnetic Weyl semimetals originally proposed in the pyrochlore iridates, which are only expected to reveal their topological nature in thin film form. To date, however, direct experimental demonstrations of these exotic phases remain elusive, due to the lack of usable single crystals and the insufficient quality of available films. Here, we report on the discovery of signatures for the long-sought magnetic Weyl semimetallic phase in (111)-oriented Eu2Ir2O7 high-quality epitaxial thin films. We observed …

Maternal Mindful Eating As A Target For Improving Metabolic Outcomes In Pregnant Women With Obesity, Karen L. Lindsay, Jasper Most, Kerrie Buehler, Maryam Kebbe, Abby D. Altazan, Leanne M. Redman

Clinical Research Faculty Publications

Background: Maternal diet and eating behaviors have the potential to influence the metabolic milieu in pregnancies complicated by obesity, with implications for the developmental programming of offspring obesity. Emerging evidence suggests that mindfulness during eating may influence metabolic health in non-pregnant populations, but its effects in the context of pregnancy is less well understood. This study explored the individual and combined effects of mindful eating and diet quality on metabolic outcomes among pregnant women with obesity. Methods: In 46 pregnant women (body mas index >30 kg/m2) enrolled in the MomEE observational study, mindful eating (Mindful Eating Questionnaire, MEQ) and energy-adjusted …

Vapor Isotopic Evidence For The Worsening Of Winter Air Quality By Anthropogenic Combustion-Derived Water, Meng Xing, Weiguo Liu, Xia Li, Weijian Zhou, Qiyuan Wang, Jie Tian, Xiaofei Li, Xuexi Tie, Guohui Li, Junji Cao, Huiming Bao, Zhisheng An

Faculty Publications

© 2020 National Academy of Sciences. All rights reserved. Anthropogenic combustion-derived water (CDW) may accumulate in an airshed due to stagnant air, which may further enhance the formation of secondary aerosols and worsen air quality. Here we collected three-winter-season, hourly resolution, water-vapor stable H and O isotope compositions together with atmospheric physical and chemical data from the city of Xi’an, located in the Guanzhong Basin (GZB) in northwestern China, to elucidate the role of CDW in particulate pollution. Based on our experimentally determined water vapor isotope composition of the CDW for individual and weighted fuels in the basin, we found …

Vapor Isotopic Evidence For The Worsening Of Winter Air Quality By Anthropogenic Combustion-Derived Water, Meng Xing, Weiguo Liu, Xia Li, Weijian Zhou, Qiyuan Wang, Jie Tian, Xiaofei Li, Xuexi Tie, Guohui Li, Junji Cao, Huiming Bao, Zhisheng An

Faculty Publications

© 2020 National Academy of Sciences. All rights reserved. Anthropogenic combustion-derived water (CDW) may accumulate in an airshed due to stagnant air, which may further enhance the formation of secondary aerosols and worsen air quality. Here we collected three-winter-season, hourly resolution, water-vapor stable H and O isotope compositions together with atmospheric physical and chemical data from the city of Xi’an, located in the Guanzhong Basin (GZB) in northwestern China, to elucidate the role of CDW in particulate pollution. Based on our experimentally determined water vapor isotope composition of the CDW for individual and weighted fuels in the basin, we found …

See You In The Funny Pages: Forms And Aesthetics Of Newspaper Comic Strips In Bill Watterson's Calvin And Hobbes, Jack Mallard

LSU Doctoral Dissertations

This project looks at how Bill Watterson’s aesthetics and his employment of the comics apparatus, as well as his advocacy for learning the history of the formal development (and decline) of the newspaper comic strip, influence Calvin and Hobbes’ approach to art, family, education, and other cultural topics. By adapting Thierry Groensteen’s theory of spatio-topia, a term describing comics’ ability to provoke meaning from how graphic, verbal, and structural elements inhabit space and relate to one another within space, I demonstrate how Bill Watterson’s quality as a comics artist comes as much from his ability to activate spatio-topic potentials …

A Global Ocean Oxygen Database And Atlas For Assessing And Predicting Deoxygenation And Ocean Health In The Open And Coastal Ocean, Marilaure Grégoire, Véronique Garçon, Hernan Garcia, Denise Breitburg, Kirsten Isensee, Andreas Oschlies, Maciej Telszewski, Alexander Barth, Henry C. Bittig, Jacob Carstensen, Thierry Carval, Fei Chai, Francisco Chavez, Daniel Conley, Laurent Coppola, Sean Crowe, Kim Currie, Minhan Dai, Bruno Deflandre, Boris Dewitte, Robert Diaz, Emilio Garcia-Robledo, Denis Gilbert, Alessandra Giorgetti, Ronnie Glud, Dimitri Gutierrez, Shigeki Hosoda, Masao Ishii, Gil Jacinto, Chris Langdon, Siv K. Lauvset, Lisa A. Levin, Karin E. Limburg

Faculty Publications

In this paper, we outline the need for a coordinated international effort toward the building of an open-access Global Ocean Oxygen Database and ATlas (GO2DAT) complying with the FAIR principles (Findable, Accessible, Interoperable, and Reusable). GO2DAT will combine data from the coastal and open ocean, as measured by the chemical Winkler titration method or by sensors (e.g., optodes, electrodes) from Eulerian and Lagrangian platforms (e.g., ships, moorings, profiling floats, gliders, ships of opportunities, marine mammals, cabled observatories). GO2DAT will further adopt a community-agreed, fully documented metadata format and a consistent quality control (QC) procedure and quality flagging (QF) system. GO2DAT …

Unravelling Rubber Tree Growth By Integrating Gwas And Biological Network-Based Approaches, Felipe Roberto Francisco, Alexandre Hild Aono, Carla Cristina Da Silva, Paulo S. Gonçalves, Erivaldo J. Scaloppi Junior, Vincent Le Guen, Roberto Fritsche-Neto, Livia Moura Souza, Anete Pereira De Souza

Faculty Publications

Hevea brasiliensis (rubber tree) is a large tree species of the Euphorbiaceae family with inestimable economic importance. Rubber tree breeding programs currently aim to improve growth and production, and the use of early genotype selection technologies can accelerate such processes, mainly with the incorporation of genomic tools, such as marker-assisted selection (MAS). However, few quantitative trait loci (QTLs) have been used successfully in MAS for complex characteristics. Recent research shows the efficiency of genome-wide association studies (GWAS) for locating QTL regions in different populations. In this way, the integration of GWAS, RNA-sequencing (RNA-Seq) methodologies, coexpression networks and enzyme networks can …

Ethnic Diversity And Preferred Leadership Attributes: A Quantitative Analysis With Secondary Use Of Qualitative Data, Maha Kumaran, Keith Walker, Samson Wakibi

Library Diversity and Residency Studies

The broad diversity and leadership landscape in the Canadian academic librarianship was assessed using a survey. The survey was designed using REDCap. It was piloted, translated into French, tested again, and electronically distributed via REDCap to English and French-speaking librarians across Canadian academic institutions. This paper represents a secondary analysis of collected data to determine whether the ethnic backgrounds of librarians have any influence on what they view as the most or least essential attributes in a leader. Secondary use of data means using data for a different purpose (from what it was collected for), sometimes by the same researcher …

Droplet-Based Fuel Property Measurements, Wanjun Dang

LSU Doctoral Dissertations

Ongoing work to find renewable biofuels to function as drop-in replacements or blending components with gasoline has identified a large number of fuel candidates. Given the vast number of potential biomass-derived fuel molecules and limited sample sizes, screening tools are required to down-select candidate fuels having desired physical properties to ensure good engine performance. This work investigates approaches for rapid screening of candidate fuels using micro-liter sample sizes targeting four properties -- surface tension, viscosity, heat of vaporization (HOV), and vapor pressure. Measurement techniques for fuel properties are developed based on unit phenomena for liquid fuel droplets including droplet oscillation …

Limits On Parameter Estimation Of Quantum Channels, Vishal Katariya

LSU Doctoral Dissertations

The aim of this thesis is to develop a theoretical framework to study parameter estimation of quantum channels. We begin by describing the classical task of parameter estimation that we build upon. In its most basic form, parameter estimation is the task of obtaining an estimate of an unknown parameter from some experimental data. This experimental data can be seen as a number of samples of a parameterized probability distribution. In general, the goal of such a task is to obtain an estimate of the unknown parameter while minimizing its error.

We study the task of estimating unknown parameters which …

An Intrinsic Proof Of An Extension Of Itô’S Isometry For Anticipating Stochastic Integrals, Hui-Hsiung Kuo, Pujan Shrestha, Sudip Sinha

Journal of Stochastic Analysis

No abstract provided.

Point Absorber Limits To Future Gravitational-Wave Detectors, W X. Jia, H Yamamoto, K Kuns, A Effler, W X. Jia, P Fritschel, R Abbott, C Adams, R X. Adhikari, A Ananyeva, S Appert, K Arai, J S. Areeda, Y Asali, S M. Aston, C Austin, A Baer, M Ball, S W. Ballmer, S Banagiri, D Barker, L Barsotti, J Bartlett, B K. Berger, G Betzwieser, D Bhattacharjee, G Billingsley, S Biscans, C D. Blair, R M. Blair, N Bode, P Booker, R Bork, A Bramley

Faculty Publications

High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface thermoelastically and thus increase losses by scattering light out of the resonant mode. The point absorber effect is a limiting factor in some high-power cavity experiments, for example, the Advanced LIGO gravitational-wave detector. In this Letter, we present a general approach to the point absorber effect from first principles and simulate its contribution to the increased scattering. The achievable circulating power in current and …

Spatiotemporal Variability Of Fishery‐Dependent Indices For The Declining Louisiana Southern Flounder Fishery, David R. Smith, Michael A. Dance, Joe West, Stephen R. Midway

Faculty Publications

No abstract provided.

Body Size, Trophic Position, And The Coupling Of Different Energy Pathways Across A Saltmarsh Landscape, Friedrich W. Keppeler, Jill A. Olin, Paola C. López‐Duarte, Michael J. Polito, Linda M. Hooper‐Bùi, Sabrina S. Taylor, Nancy N. Rabalais, F. Joel Fodrie, Brian J. Roberts, R. Eugene Turner, Charles W. Martin, Olaf P. Jensen

Faculty Publications

No abstract provided.

Publisher Correction: Hydro-Climatic Changes Of Wetlandscapes Across The World (Scientific Reports, (2021), 11, 1, (2754), 10.1038/S41598-021-81137-3), I. Åhlén, G. Vigouroux, G. Destouni, J. Pietroń, N. Ghajarnia, J. Anaya, J. Blanco, S. Borja, S. Chalov, K. P. Chun, N. Clerici, A. Desormeaux, P. Girard, O. Gorelits, A. Hansen, F. Jaramillo, Z. Kalantari, A. Labbaci, L. Licero-Villanueva, J. Livsey, G. Maneas, K. L.Mc Curley Pisarello, D. Moshir Pahani, S. Palomino-Ángel, R. Price, C. Ricaurte-Villota, L. Fernanda Ricaurte, V. H. Rivera-Monroy, A. Rodriguez, E. Rodriguez, J. Salgado, B. Sannel, S. Seifollahi-Aghmiuni

Faculty Publications

In the original version of this Article, V. H. Rivera-Monroy was incorrectly affiliated with ‘Alexander von Humboldt Biological Resources Research Institute, Calle 28 A No. 15-09, Bogotá, DC, 70803, Colombia’. The correct affiliation is listed below. Department of Oceanography and Coastal Sciences, College of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA As a result, Affiliations 22–27 were incorrectly listed as Affiliations 21–26 respectively. The original Article has been corrected.

Twelve-Month Specific Igg Response To Sars-Cov-2 Receptor-Binding Domain Among Covid-19 Convalescent Plasma Donors In Wuhan, Cesheng Li, Ding Yu, Xiao Wu, Hong Liang, Zhijun Zhou, Yong Xie, Taojing Li, Junzheng Wu, Fengping Lu, Lu Feng, Min Mao, Lianzhen Lin, Huanhuan Guo, Shenglan Yue, Feifei Wang, Yan Peng, Yong Hu, Zejun Wang, Jianhong Yu, Yong Zhang, Jia Lu, Haoran Ning, Huichuan Yang, Daoxing Fu, Yanlin He, Dongbo Zhou, Tao Du, Kai Duan, Demei Dong, Kun Deng, Xia Zou, Ya Zhang, Rong Zhou, Yang Gao

Division of Basic Science Faculty Publications

To investigate the duration of humoral immune response in convalescent coronavirus disease 2019 (COVID-19) patients, we conduct a 12-month longitudinal study through collecting a total of 1,782 plasma samples from 869 convalescent plasma donors in Wuhan, China and test specific antibody responses. The results show that positive rate of IgG antibody against receptor-binding domain of spike protein (RBD-IgG) to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the COVID-19 convalescent plasma donors exceeded 70% for 12 months post diagnosis. The level of RBD-IgG decreases with time, with the titer stabilizing at 64.3% of the initial level by the 9th month. …

5-Ht Recruits Distinct Neurocircuits To Inhibit Hunger-Driven And Non-Hunger-Driven Feeding, Yanlin He, Xing Cai, Hailan Liu, Krisitine M. Conde, Pingwen Xu, Yongxiang Li, Chunmei Wang, Meng Yu, Yang He, Hesong Liu, Chen Liang, Tingting Yang, Yongjie Yang, Kaifan Yu, Julia Wang, Rong Zheng, Feng Liu, Zheng Sun, Lora Heisler, Qi Wu, Qingchun Tong, Canjun Zhu, Gang Shu, Yong Xu

Division of Basic Science Faculty Publications

Obesity is primarily a consequence of consuming calories beyond energetic requirements, but underpinning drivers have not been fully defined. 5-Hydroxytryptamine (5-HT) neurons in the dorsal Raphe nucleus (5-HTDRN) regulate different types of feeding behavior, such as eating to cope with hunger or for pleasure. Here, we observed that activation of 5-HTDRN to hypothalamic arcuate nucleus (5-HTDRN → ARH) projections inhibits food intake driven by hunger via actions at ARH 5-HT2C and 5-HT1B receptors, whereas activation of 5-HTDRN to ventral tegmental area (5-HTDRN → VTA) projections inhibits non-hunger-driven feeding via actions at 5-HT2C receptors. Further, hunger-driven feeding gradually activates ARH-projecting 5-HTDRN …

Genomics And Transcriptomics Landscapes Associated To Changes In Insulin Sensitivity In Response To Endurance Exercise Training, Louise Y. Takeshita, Peter K. Davidsen, John M. Herbert, Philipp Antczak, Matthijs K.C. Hesselink, Patrick Schrauwen, S. John Weisnagel, Jeremy M. Robbins, Robert E. Gerszten, Sujoy Ghosh, Mark A. Sarzynski, Claude Bouchard, Francesco Falciani

Division of Basic Science Faculty Publications

Despite good adherence to supervised endurance exercise training (EET), some individuals experience no or little improvement in peripheral insulin sensitivity. The genetic and molecular mechanisms underlying this phenomenon are currently not understood. By investigating genome-wide variants associated with baseline and exercise-induced changes (∆) in insulin sensitivity index (Si) in healthy volunteers, we have identified novel candidate genes whose mouse knockouts phenotypes were consistent with a causative effect on Si. An integrative analysis of functional genomic and transcriptomic profiles suggests genetic variants have an aggregate effect on baseline Si and ∆Si, focused around cholinergic signalling, including downstream calcium and chemokine signalling. …

The Application Of Deep Learning Algorithms To Pediatric Vascular Anomalies Using A Limited Dataset, Briana I. Robertson

Honors Capstones

No abstract provided.

Culture And Economics: A Literature Review, Faith Howard

Honors Capstones

No abstract provided.

Non-Local Corrections To The Typical Medium Theory Of Anderson Localization, H. Terletska, A. Moilanen, K. M. Tam, Y. Zhang, Y. Wang, M. Eisenbach, N. S. Vidhyadhiraja, L. Chioncel, J. Moreno

Faculty Publications

We use the recently developed finite cluster typical medium approach to study the Anderson localization transition in three dimensions. Applying our method to the box and binary alloy disorder distributions, we find a fast convergence with the cluster size. We demonstrate the importance of the typical medium environment and the non-local spatial correlations for the proper characterization of the localization transition. As the cluster size increases, our typical medium cluster method recovers the correct critical disorder strength for the transition. Our findings highlight the importance of the non-local cluster corrections for capturing the localization behavior of the mobility edge trajectories. …

Current State Of The Imaging Physics Workforce And Financial Model, David W. Jordan, Wayne D. Newhauser, Michael D. Mills

Faculty Publications

No abstract provided.

Multi-Scale Feedback And Feeding In The Closest Radio Galaxy Centaurus A, B. Mckinley, S. J. Tingay, M. Gaspari, R. P. Kraft, C. Matherne, A. R. Offringa, M. Mcdonald, M. S. Calzadilla, S Veilleux, S. S. Shabala, S. D. J. Gwyn, J. Bland-Hawthorn, D. Crnojevic, B. M. Gaensler, M. Johnston-Hollitt

Faculty Publications

Supermassive black holes and supernova explosions at the centres of active galaxies power cycles of outflowing and inflowing gas that affect galactic evolution and the overall structure of the Universe(1,2). While simulations and observations show that this must be the case, the range of physical scales (over ten orders of magnitude) and paucity of available tracers make both the simulation and observation of these effects difficult(3,4). By serendipity, there lies an active galaxy, Centaurus A (NGC 5128)(5,6), at such a close proximity as to allow its observation over this entire range of scales and across the entire electromagnetic spectrum. In …

The Dynamics Of Introgression Across An Avian Radiation, S Singhal, G E. Derryberry, G A. Bravo, E P. Derryberry, S Singhal, M G. Harvey

Faculty Publications

Hybridization and resulting introgression can play both a destructive and a creative role in the evolution of diversity. Thus, characterizing when and where introgression is most likely to occur can help us understand the causes of diversification dynamics. Here, we examine the prevalence of and variation in introgression using phylogenomic data from a large (1300+ species), geographically widespread avian group, the suboscine birds. We first examine patterns of gene tree discordance across the geographic distribution of the entire clade. We then evaluate the signal of introgression in a subset of 206 species triads using Patterson's D-statistic and test for associations …