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Identifying Potential Drivers Of Distribution Patterns Of Invasive Corbicula Fluminea Relative To Native Freshwater Mussels (Unionidae) Across Spatial Scales, Taylor E. Kelley, Garrett W. Hopper, Irene Sánchez González, Jamie R. Bucholz, Carla L. Atkinson Mar 2022

Identifying Potential Drivers Of Distribution Patterns Of Invasive Corbicula Fluminea Relative To Native Freshwater Mussels (Unionidae) Across Spatial Scales, Taylor E. Kelley, Garrett W. Hopper, Irene Sánchez González, Jamie R. Bucholz, Carla L. Atkinson

Faculty Publications

This study aimed to identify the importance of ecological factors to distribution patterns of the invasive Clam (Corbicula fluminea) relative to native mussels (family: Unionidae) across seven rivers within the Mobile and Tennessee basins, Southeast United States. We quantitatively surveyed dense, diverse native mussel aggregations across 20 river reaches and estimated mussel density, biomass, and species richness along with density of invasive C. fluminea (hereafter Corbicula). We measured substrate particle size, velocity, and depth in quadrats where animals were collected. Additionally, we characterized reach scale environmental parameters including seston quantity and quality (% Carbon, % Nitrogen, % Phosphorous), water chemistry …

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Med12 Regulates Human Adipose-Derived Stem Cell Adipogenesis And Mediator Kinase Subunit Expression In Murine Adipose Depots, Sree Venigalla, Joseph Straub, Onyekachi Idigo, Caroline Rinderle, Jacqueline M. Stephens, Jamie J. Newman Mar 2022

Med12 Regulates Human Adipose-Derived Stem Cell Adipogenesis And Mediator Kinase Subunit Expression In Murine Adipose Depots, Sree Venigalla, Joseph Straub, Onyekachi Idigo, Caroline Rinderle, Jacqueline M. Stephens, Jamie J. Newman

Division of Basic Science Faculty Publications

The mediator kinase module plays a critical role in the regulation of transcription during metabolic processes. Here we demonstrate that in human adipose-derived stem cells (hASCs), kinase module subunits have distinct mRNA and protein expression profiles during different stages of adipogenesis. In addition, siRNA-mediated loss of MED12 results in decreased adipogenesis as evident through decreased lipid accumulation and decreased expression of PPARγ, a master regulator of adipogenesis. Moreover, the decrease in adipogenesis and reduced PPARγexpression are observed only during the early stages of MED12 knockdown. At later stages, knockdown of MED12 did not have any significant effects on adipogenesis or …

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“It Just Seems Like People Are Talking About Menopause, But Nobody Has A Solution”: A Qualitative Exploration Of Menopause Experiences And Preferences For Weight Management Among Black Women, Chelsea L. Kracht, Jessica St Romain, Julie C. Hardee, Nanette Santoro, Leanne M. Redman, Kara L. Marlatt Mar 2022

“It Just Seems Like People Are Talking About Menopause, But Nobody Has A Solution”: A Qualitative Exploration Of Menopause Experiences And Preferences For Weight Management Among Black Women, Chelsea L. Kracht, Jessica St Romain, Julie C. Hardee, Nanette Santoro, Leanne M. Redman, Kara L. Marlatt

Clinical Research Faculty Publications

Objectives: A qualitative study was performed to characterize experiences of women going through menopause, as well as to identify barriers and facilitators for participating in a lifestyle program targeting weight management during menopause. Study Design: Perimenopausal and postmenopausal Black women with a self-reported desire to lose or maintain weight during menopause participated in a total of six focus groups. Main Outcome Measures: Women were asked about their past experiences with diet, exercise, and weight management; their menopause experiences; as well as specific components and considerations for developing a lifestyle program for weight management. Thematic analysis was conducted on coded transcripts …

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Validity Of Four Commercially Available Metabolic Carts For Assessing Resting Metabolic Rate And Respiratory Exchange Ratio In Non-Ventilated Humans, J. M.A. Alcantara, J. E. Galgani, L. Jurado-Fasoli, M. Dote-Montero, E. Merchan-Ramirez, E. Ravussin, J. R. Ruiz, G. Sanchez-Delgado Mar 2022

Validity Of Four Commercially Available Metabolic Carts For Assessing Resting Metabolic Rate And Respiratory Exchange Ratio In Non-Ventilated Humans, J. M.A. Alcantara, J. E. Galgani, L. Jurado-Fasoli, M. Dote-Montero, E. Merchan-Ramirez, E. Ravussin, J. R. Ruiz, G. Sanchez-Delgado

Clinical Research Faculty Publications

Background & aims: The validity of most commercially available metabolic cart is mostly unknown. Thus, we aimed to determine the accuracy, precision, within-subject reproducibility, and concordance of RMR and RER measured by four commercially available metabolic carts [Cosmed Q-NRG, Vyaire Vyntus CPX, Maastricht Instruments Omnical, and Medgraphics Ultima CardiO2]. Further, we studied whether a previously proposed simulation-based post-calorimetric calibration of cart readouts [individual calibration control evaluation (ICcE)] modify the RMR and RER reproducibility and concordance. Methods: Three experiments simulating different RMR and RER by controlled pure gas (N2 and CO2) infusions were conducted on 5 non-consecutive days. Moreover, 30-min methanol …

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The Counterbalancing Effects Of Energy Expenditure On Body Weight Regulation: Orexigenic Versus Energy-Consuming Mechanisms, Paolo Piaggi, Alessio Basolo, Corby K. Martin, Leanne M. Redman, Susanne B. Votruba, Jonathan Krakoff Mar 2022

The Counterbalancing Effects Of Energy Expenditure On Body Weight Regulation: Orexigenic Versus Energy-Consuming Mechanisms, Paolo Piaggi, Alessio Basolo, Corby K. Martin, Leanne M. Redman, Susanne B. Votruba, Jonathan Krakoff

Clinical Research Faculty Publications

Objective: Weight change is a dynamic function of whole-body energy balance resulting from the interplay between energy intake and energy expenditure (EE). Recent reports have provided evidence for the existence of a causal effect of EE on energy intake, suggesting that increased EE may drive overeating, thereby promoting future weight gain. This study investigated the relationships between ad libitum energy intake and 24-hour EE (24-h EE) in sedentary conditions versus long-term, free-living weight change using a mediation analysis framework. Methods: Native American individuals (n = 61, body fat by dual-energy x-ray absorptiometry: 39.7% [SD 9.5%]) were admitted to the clinical …

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Decreasing Phosphorus Fertility To Reduce Sweet Potato Root Growth During Container-Grown Transplant Production, L. Rouse, J. Beasley, D. Labonte, J. Kuehny Mar 2022

Decreasing Phosphorus Fertility To Reduce Sweet Potato Root Growth During Container-Grown Transplant Production, L. Rouse, J. Beasley, D. Labonte, J. Kuehny

Faculty Publications

Sweetpotato [Ipomoea batatas (L.) Lam.], grown as an edible ornamental, is propagated in home gardens using locally purchased transplants. However, vigorous growth of sweetpotato limits the period of transplant salability due to root confinement. The objective of the experiment was to evaluate reductions in phosphorus (P) fertility to slow transplant root growth and extend the period of salability. Cuttings were planted into containers and fertilized at 0, 5 (0.0007), 10 (0.0012), 15 (0.0020), 20 (0.0024), and 31 mg P.L-1 (0.0040 oz P.gal-1) using a modified Hoagland solution. All transplants fertilized at 5 mg P.L-1 increased in shoot length, color, and …

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Assessing Influenza Vaccination Coverage And Predictors In Persons Living With Hiv/Aids In Louisiana, June 2002-June 2013, Patrick Maloney, Ariane Rung, Stephanie Broyles, John Couk, Edward Peters, Susanne Straif-Bourgeois Mar 2022

Assessing Influenza Vaccination Coverage And Predictors In Persons Living With Hiv/Aids In Louisiana, June 2002-June 2013, Patrick Maloney, Ariane Rung, Stephanie Broyles, John Couk, Edward Peters, Susanne Straif-Bourgeois

Population and Public Health Science Faculty Publications

Background. Despite the burden of disease and increased risk of influenza-associated morbidity and mortality among PLWHA, influenza vaccination has been understudied in this population. Methods. We built an 11-year cohort of HIV-infected adults from medical records of PLWHA seeking care within the Louisiana State University medical system from June 2002-June 2013. Influenza vaccination uptake among PLWHA was calculated overall and for each medical facility for each influenza season. Linear regression was used to assess influenza vaccination uptake over time, both overall and by facility. Data were restricted to the final influenza season (2012-13) to assess predictors of PLWHA vaccination. Individuals …

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Daily Steps And All-Cause Mortality: A Meta-Analysis Of 15 International Cohorts, Amanda E. Paluch, Shivangi Bajpai, David R. Bassett, Mercedes R. Carnethon, Ulf Ekelund, Kelly R. Evenson, Deborah A. Galuska, Barbara J. Jefferis, William E. Kraus, I. Min Lee, Charles E. Matthews, John D. Omura, Alpa V. Patel, Carl F. Pieper, Erika Rees-Punia, Dhayana Dallmeier, Jochen Klenk, Peter H. Whincup, Erin E. Dooley, Kelley Pettee Gabriel, Priya Palta, Lisa A. Pompeii, Ariel Chernofsky, Martin G. Larson, Ramachandran S. Vasan, Nicole Spartano, Marcel Ballin, Peter Nordström, Anna Nordström, Sigmund A. Anderssen, Bjørge H. Hansen, Jennifer A. Cochrane, Terence Dwyer, Jing Wang Mar 2022

Daily Steps And All-Cause Mortality: A Meta-Analysis Of 15 International Cohorts, Amanda E. Paluch, Shivangi Bajpai, David R. Bassett, Mercedes R. Carnethon, Ulf Ekelund, Kelly R. Evenson, Deborah A. Galuska, Barbara J. Jefferis, William E. Kraus, I. Min Lee, Charles E. Matthews, John D. Omura, Alpa V. Patel, Carl F. Pieper, Erika Rees-Punia, Dhayana Dallmeier, Jochen Klenk, Peter H. Whincup, Erin E. Dooley, Kelley Pettee Gabriel, Priya Palta, Lisa A. Pompeii, Ariel Chernofsky, Martin G. Larson, Ramachandran S. Vasan, Nicole Spartano, Marcel Ballin, Peter Nordström, Anna Nordström, Sigmund A. Anderssen, Bjørge H. Hansen, Jennifer A. Cochrane, Terence Dwyer, Jing Wang

Population and Public Health Science Faculty Publications

Background: Although 10 000 steps per day is widely promoted to have health benefits, there is little evidence to support this recommendation. We aimed to determine the association between number of steps per day and stepping rate with all-cause mortality. Methods: In this meta-analysis, we identified studies investigating the effect of daily step count on all-cause mortality in adults (aged ≥18 years), via a previously published systematic review and expert knowledge of the field. We asked participating study investigators to process their participant-level data following a standardised protocol. The primary outcome was all-cause mortality collected from death certificates and country …

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Post-Acute Sequelae Of Covid-19: A Metabolic Perspective, Philipp E. Scherer, John P. Kirwan, Clifford J. Rosen Mar 2022

Post-Acute Sequelae Of Covid-19: A Metabolic Perspective, Philipp E. Scherer, John P. Kirwan, Clifford J. Rosen

Division of Basic Science Faculty Publications

The SARS-CoV-2 pandemic continues to rage around the world. At the same time, despite strong public health measures and high vaccination rates in some countries, a post-COVID-19 syndrome has emerged which lacks a clear definition, prevalence, or etiology. However, fatigue, dyspnea, brain fog, and lack of smell and/or taste are often characteristic of patients with this syndrome. These are evident more than a month after infection, and are labeled as Post-Acute Sequelae of CoV-2 (PASC) or commonly referred to as long-COVID. Metabolic dysfunction (i.e., obesity, insulin resistance, and diabetes mellitus) is a predisposing risk factor for severe acute COVID-19, and …

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The Influence Of Whey Protein Heating Parameters On Their Susceptibility To Digestive Enzymes And The Antidiabetic Activity Of Hydrolysates, Kungnang Bunsroem, Witoon Prinyawiwatkul, Siwatt Thaiudom Mar 2022

The Influence Of Whey Protein Heating Parameters On Their Susceptibility To Digestive Enzymes And The Antidiabetic Activity Of Hydrolysates, Kungnang Bunsroem, Witoon Prinyawiwatkul, Siwatt Thaiudom

Faculty Publications

The inhibition of dipeptidyl peptidase-IV (DPP-IV) and the release of glucagon-like peptide-1 (GLP-1) could normalize blood glucose levels in diabetic patients. This study evaluated the susceptibility of whey proteins to enzyme hydrolysis and the antidiabetic properties of protein hydrolysates from β-lactoglobulin (β-LG) and α-lactalbumin (α-LA) solutions compared with whey protein isolate (WPI) solution treated at different heating temperatures (65, 75, and 85◦ C). α-LA hydrolysate provided the lowest degree of hydrolysis (DH). Those heating temperatures did not significantly affect the DH of all protein hydrolysates. α-LA hydrolysate significantly increased GLP-1 levels and DPP-IV inhibitory activity more than β-LG hydrolysate. WPI …

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Nonlocal Structure Of The Leading Order Ab Initio Effective Potentials For Proton Elastic Scattering From Light Nuclei, Ch Elster, M. Burrows, R. B. Baker, S. P. Weppner, K. D. Launey, P. Maris, G. Popa Mar 2022

Nonlocal Structure Of The Leading Order Ab Initio Effective Potentials For Proton Elastic Scattering From Light Nuclei, Ch Elster, M. Burrows, R. B. Baker, S. P. Weppner, K. D. Launey, P. Maris, G. Popa

Faculty Publications

Based on the spectator expansion of the multiple scattering series we employ a chiral next-to-next-to-leading order (NNLO) nucleon-nucleon interaction on the same footing in the structure as well as in the reaction calculation to obtain an in leading-order consistent effective potential for nucleon-nucleus elastic scattering, which includes the spin of the struck target nucleon. As an example we present proton scattering off 12C.

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Personalized 3d-Printed Anthropomorphic Whole-Body Phantom Irradiated By Protons, Photons, And Neutrons, Hunter Tillery, Meagan Moore, Kyle J. Gallagher, Phillip J. Taddei, Erick Leuro, David Argento, Gregory Moffitt, Marissa Kranz, Margaret Carey, Steven B. Heymsfield, Wayne D. Newhauser Mar 2022

Personalized 3d-Printed Anthropomorphic Whole-Body Phantom Irradiated By Protons, Photons, And Neutrons, Hunter Tillery, Meagan Moore, Kyle J. Gallagher, Phillip J. Taddei, Erick Leuro, David Argento, Gregory Moffitt, Marissa Kranz, Margaret Carey, Steven B. Heymsfield, Wayne D. Newhauser

Faculty Publications

The objective of this study was to confirm the feasibility of three-dimensionally-printed (3D-printed), personalized whole-body anthropomorphic phantoms for radiation dose measurements in a variety of charged and uncharged particle radiation fields. We 3D-printed a personalized whole-body phantom of an adult female with a height of 154.8 cm, mass of 90.7 kg, and body mass index of 37.8 kg/m2. The phantom comprised of a hollow plastic shell filled with water and included a watertight access conduit for positioning dosimeters. It is compatible with a wide variety of radiation dosimeters, including ionization chambers that are suitable for uncharged and charged particles. Its …

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Evaluating Stratified Substrates Effect On Containerized Crop Growth Under Varied Irrigation Strategies, Kristopher S. Criscione, Jeb S. Fields, Jim S. Owen, Lisa Fultz, Edward Bush Mar 2022

Evaluating Stratified Substrates Effect On Containerized Crop Growth Under Varied Irrigation Strategies, Kristopher S. Criscione, Jeb S. Fields, Jim S. Owen, Lisa Fultz, Edward Bush

Faculty Publications

Growers rely on soilless substrates to provide sufficient water and nutrients to containerized crops. Traditional bark-based substrates are engineered to have relatively low water-holding capabilities, which can lead to nonuniform rewetting patterns and inefficient usage of water resources. Engineering substrates to redistribute water dynamics and maximize aeration within the container may improve water resource efficiencies. The goal of this study was to evaluate whether more efficient irrigation schedules can be used when stratifying unique substrates within a container for added crop water and nutrient efficiency. Loropetalum chinense ‘Ruby’ liners were planted and grown in a conventional pine bark substrate or …

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The H3.3 Chaperone Hira Complex Orchestrates Oocyte Developmental Competence, Rowena Smith, Andrej Susor, Hao Ming, Janet Tait, Marco Conti, Zongliang Jiang, Chih Jen Lin Mar 2022

The H3.3 Chaperone Hira Complex Orchestrates Oocyte Developmental Competence, Rowena Smith, Andrej Susor, Hao Ming, Janet Tait, Marco Conti, Zongliang Jiang, Chih Jen Lin

Faculty Publications

Successful reproduction requires an oocyte competent to sustain early embryo development. By the end of oogenesis, the oocyte has entered a transcriptionally silenced state, the mechanisms and significance of which remain poorly understood. Histone H3.3, a histone H3 variant, has unique cell cycle-independent functions in chromatin structure and gene expression. Here, we have characterised the H3.3 chaperone Hira/Cabin1/Ubn1 complex, showing that loss of function of any of these subunits causes early embryogenesis failure in mouse. Transcriptome and nascent RNA analyses revealed that transcription is aberrantly silenced in mutant oocytes. Histone marks, including H3K4me3 and H3K9me3, are reduced and chromatin accessibility …

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The Potential Of Dietary Bioactive Compounds Against Sars-Cov-2 And Covid-19-Induced Endothelial Dysfunction, Jack N. Losso Mar 2022

The Potential Of Dietary Bioactive Compounds Against Sars-Cov-2 And Covid-19-Induced Endothelial Dysfunction, Jack N. Losso

Faculty Publications

COVID-19 is an endothelial disease. All the major comorbidities that increase the risk for severe SARS-CoV-2 infection and severe COVID-19 including old age, obesity, diabetes, hypertension, respiratory disease, compromised immune system, coronary artery disease or heart failure are associated with dysfunctional endothelium. Genetics and environmental factors (epigenetics) are major risk factors for endothelial dysfunction. Individuals with metabolic syndrome are at increased risk for severe SARS-CoV-2 infection and poor COVID-19 outcomes and higher risk of mortality. Old age is a non-modifiable risk factor. All other risk factors are modifiable. This review also identifies dietary risk factors for endothelial dysfunction. Potential dietary …

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Topological Edge States At Singular Points In Non-Hermitian Plasmonic Systems, Yin Huang, Yuecheng Shen, Georgios Veronis Mar 2022

Topological Edge States At Singular Points In Non-Hermitian Plasmonic Systems, Yin Huang, Yuecheng Shen, Georgios Veronis

Faculty Publications

We introduce non-Hermitian plasmonic waveguide-cavity systems with topological edge states (TESs) at singular points. The compound unit cells of the structures consist of metal-dielectric-metal (MDM) stub resonators side-coupled to an MDM waveguide. We show that we can realize both a TES and an exceptional point at the same frequency when a proper amount of loss is introduced into a finite three-unit-cell structure. We also show that the finite structure can exhibit both a TES and a spectral singularity when a proper amount of gain is introduced into the structure. In addition, we show that we can simultaneously realize a unidirectional …

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Correction To: Optimal Location For Renewable Gas Production And Distribution Facilities: Resource Planning And Management (Bioenergy Research, (2022), 15, 1, (650-666), 10.1007/S12155-021-10278-0), Bhaba R. Sarker, Bingqing Wu, Krishna P. Paudel Mar 2022

Correction To: Optimal Location For Renewable Gas Production And Distribution Facilities: Resource Planning And Management (Bioenergy Research, (2022), 15, 1, (650-666), 10.1007/S12155-021-10278-0), Bhaba R. Sarker, Bingqing Wu, Krishna P. Paudel

Faculty Publications

In the "A Numerical Illustration" section, the mathematical expression in matrix format were mistakenly presented. The correct form are as follows.

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Event-Triggered Control For Linear Time-Varying Systems Using A Positive Systems Approach, Frederic Mazenc, Michael Malisoff, Corina Barbalata, Zhong Ping Jiang Mar 2022

Event-Triggered Control For Linear Time-Varying Systems Using A Positive Systems Approach, Frederic Mazenc, Michael Malisoff, Corina Barbalata, Zhong Ping Jiang

Faculty Publications

This paper presents a new design for the event-triggered output feedback control of uncertain linear time-varying systems. Departing from the traditional treatments of event-triggered linear time-invariant systems, it is shown that factoring of fundamental solutions as products of solutions of matrix differential equations, together with small-gain arguments and the notions of interval observers and positive systems, lead to a new class of robust event-triggered output-feedback controllers. A key innovation is our use of new event triggers, which use vectors of absolute values instead of the usual Euclidean 2-norms. An illustrative example of a curve tracking system from marine robotics validates …

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Lignin Nanoparticles As Delivery Systems To Facilitate Translocation Of Methoxyfenozide In Soybean (Glycine Max), Omar E. Mendez, Carlos E. Astete, Rafael Cueto, Brian Eitzer, Eban A. Hanna, Fallon Salinas, Carlos Tamez, Yi Wang, Jason C. White, Cristina M. Sabliov Mar 2022

Lignin Nanoparticles As Delivery Systems To Facilitate Translocation Of Methoxyfenozide In Soybean (Glycine Max), Omar E. Mendez, Carlos E. Astete, Rafael Cueto, Brian Eitzer, Eban A. Hanna, Fallon Salinas, Carlos Tamez, Yi Wang, Jason C. White, Cristina M. Sabliov

Faculty Publications

Nanoscale delivery systems have the potential to improve the effectiveness of agrochemicals while reducing their negative environmental impacts. Herein, we explore the use of lignin nanoparticles (LNPs) to enhance the translocation of methoxyfenozide (MFZ), a non-systemic pesticide, in soybean plants under hydroponic conditions. LNPs (113.8 ± 3.5 nm and zeta potential – 53.3 ± 6.9 mV) were synthesized by emulsion evaporation from lignin-graft-poly(lactic-co-glycolic) acid and MFZ was incorporated into the LNPs (2.7% w/w). Twenty eight day old soybeans were grown hydroponically and were treated with 0.01, 0.1 or 1 mg/ml of LNPs. Plants were harvested after 6, 12, and 24 …

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90snet:, Seth Richard Mar 2022

90snet:, Seth Richard

Honors Capstones

No abstract provided.

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Bela Real Estate Company, Dallin G. Broussard Mar 2022

Bela Real Estate Company, Dallin G. Broussard

Honors Capstones

No abstract provided.

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Glutamic-Oxaloacetic Transaminase 2 (Got2) Reverse Reaction Could Act As A Possible Relief Valve For Mitochondrial Substrate Overload Induced By Glucocorticoids, Humza Pirzadah Mar 2022

Glutamic-Oxaloacetic Transaminase 2 (Got2) Reverse Reaction Could Act As A Possible Relief Valve For Mitochondrial Substrate Overload Induced By Glucocorticoids, Humza Pirzadah

Honors Capstones

No abstract provided.

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Rnai-Based Screen To Identify Transcription Factors Regulating Small-Vcp Interacting Protein (Svip) Expression In Drosophila Melanogaster, Tiffany Dang Mar 2022

Rnai-Based Screen To Identify Transcription Factors Regulating Small-Vcp Interacting Protein (Svip) Expression In Drosophila Melanogaster, Tiffany Dang

Honors Capstones

No abstract provided.

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Exploring The Effect Of Hormetic Stress And Aging On Tubular Lysosome Induction In Caenorhabditis Elegans Nematodes, Sanaa Alam Mar 2022

Exploring The Effect Of Hormetic Stress And Aging On Tubular Lysosome Induction In Caenorhabditis Elegans Nematodes, Sanaa Alam

Honors Capstones

No abstract provided.

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Field Retrofit And Testing Of A Corroded Metal Culvert Using Gfrp, Mahmoud Reda Taha, Susan Bogus, Mohammed Abdellatef, Daniel Heras Murcia Mar 2022

Field Retrofit And Testing Of A Corroded Metal Culvert Using Gfrp, Mahmoud Reda Taha, Susan Bogus, Mohammed Abdellatef, Daniel Heras Murcia

Publications

One of the current pressing problem for all DOTs is the corrosion-oriented deterioration of the existing metal culverts. These metal culverts typically are designed for a life of 50 years. However, corrosion is making them last no longer than 30years. Here we propose use of Glass Fiber Reinforced Polymers (GFRP) pipe section as a fit-in GFRP profile liner for complete repair and rehabilitation of the corroded metal culvert with an expected life of 75 years. This is mainly because of the corrosion free nature of the GFRP material. In the current study, the design method for using glass fiber-reinforced polymer …

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Viscosity Of Fe-Ni-C Liquids Up To Core Pressures And Implications For Dynamics Of Planetary Cores, Feng Zhu, Xiaojing Lai, Jianwei Wang, Quentin Williams, Jiachao Liu, Yoshio Kono, Bin Chen Feb 2022

Viscosity Of Fe-Ni-C Liquids Up To Core Pressures And Implications For Dynamics Of Planetary Cores, Feng Zhu, Xiaojing Lai, Jianwei Wang, Quentin Williams, Jiachao Liu, Yoshio Kono, Bin Chen

Faculty Publications

The viscosity of iron alloy liquids is the key for the core dynamo and core-mantle differentiation of terrestrial bodies. Here we measured the viscosity of Fe-Ni-C liquids up to 7 GPa using the floating sphere viscometry method and up to 330 GPa using first-principles calculations. We found a viscosity increase at ∼3–5 GPa, coincident with a structural transition in the liquids. After the transition, the viscosity reaches ∼14–27 mPa·s, a factor of 2–4 higher than that of Fe and Fe-S liquids. Our computational results from 5 to 330 GPa also indicate a high viscosity of the Fe-Ni-C liquids. For a …

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“An Afternoon Of Songs And Stories: Kaley Pichon’S Senior Lecture Recital”, Kaley Pichon Feb 2022

“An Afternoon Of Songs And Stories: Kaley Pichon’S Senior Lecture Recital”, Kaley Pichon

Honors Capstones

No abstract provided.

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Secar: A Recoil Separator For Nuclear Astrophysics, Pelagia Tsintari, Ruchi Garg, Georg Berg, Jeff Blackmon, Kelly Chipps, Manoel Couder, Catherine Deibel, Nikolaos Dimitrakopoulos, Uwe Greife, Ashley Hood, Rahul Jain, Caleb Marshall, Zach Meisel, Sara Miskovich, Fernando Montes, Georgios Perdikakis, Thomas Ruland, Hendrik Schatz, Kiana Setoodehnia, Michael Smith, Louis Wagner Feb 2022

Secar: A Recoil Separator For Nuclear Astrophysics, Pelagia Tsintari, Ruchi Garg, Georg Berg, Jeff Blackmon, Kelly Chipps, Manoel Couder, Catherine Deibel, Nikolaos Dimitrakopoulos, Uwe Greife, Ashley Hood, Rahul Jain, Caleb Marshall, Zach Meisel, Sara Miskovich, Fernando Montes, Georgios Perdikakis, Thomas Ruland, Hendrik Schatz, Kiana Setoodehnia, Michael Smith, Louis Wagner

Faculty Publications

Proton- and alpha-capture reactions on unstable proton-rich nuclei power astrophysical explosions like novae and X-ray bursts. Direct measurements of these reactions are crucial for understanding the mechanisms behind these explosions and the nucleosynthesis at such sites. The recoil mass separator, SECAR (SEparator for CApture Reactions) at the National Superconducting Cyclotron Laboratory (NSCL) and the Facility for Rare Isotope Beams (FRIB), has been designed with the required sensitivity to study (p,γ) and (α,γ) reactions, directly at astrophysical energies in inverse kinematics, with radioactive beams of masses up to about A = 65. The complete SECAR system, including two Wien Filters for …

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My Favorite Murder As Discursive Performance, Taylor Dawson Feb 2022

My Favorite Murder As Discursive Performance, Taylor Dawson

LSU Doctoral Dissertations

My Favorite Murder as Discursive Performance uses performance-centered discourse analysis to explore the major narratives informing the popular true crime comedy podcast, My Favorite Murder (MFM). Hosts, Karen and Georgia draw from podcast, comedy, true crime, feminist, and mental health discourse to create a unique discursive space where “murderinos” (fans of the podcast) express and explore aspects of their own life experiences. I explore the performative strategies MFM uses and the effects of those choices, drawing on some of my own experiences as a murderino. Ultimately I argue that a performance lens reveals some of the imperfect but powerful ways …

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Three Essays On Behaviors In Crowdsourcing Communities, Ali Simaei Gargari Feb 2022

Three Essays On Behaviors In Crowdsourcing Communities, Ali Simaei Gargari

LSU Doctoral Dissertations

Over the last decade, the interest in studying crowdsourcing platforms has dramatically increased among researchers in the information systems (IS) area. My dissertation includes three essays on crowdsourcing. The first essay provides an extensive literature review on crowdsourcing and shows several gaps in the literature. The second essay highlights the gaps in the literature on innovation contest platforms and draws on the organizational learning literature to fill the gaps. In this research, I draw on the organizational learning literature to study the undelying dynamics of specialization and variation in innovation contest platforms. Using data of nearly 35000 users' participation history …

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