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Effects Of Hurricane Harvey On The Trophic Status Of Juvenile Sport Fishes (Cynoscion Nebulosus, Sciaenops Ocellatus) In An Estuarine Nursery, Philip Matich, Kaya B. Moore, Jeffrey D. Plumlee Jul 2020

Effects Of Hurricane Harvey On The Trophic Status Of Juvenile Sport Fishes (Cynoscion Nebulosus, Sciaenops Ocellatus) In An Estuarine Nursery, Philip Matich, Kaya B. Moore, Jeffrey D. Plumlee

Faculty Publications

Understanding the implications of environmental disturbance is of growing importance as climate change and extreme weather events increasingly threaten estuaries and other coastal ecosystems. Among species at risk in estuarine habitats, sport fishes are of particular interest to conservation and management agencies, because of their ecological and economic value. Here, we evaluate the effects of Hurricane Harvey on the abundance, diet, and body condition of age-0 red drum (Sciaenops ocellatus) and spotted seatrout (Cynoscion nebulosus) in Powderhorn Lake, a nearshore estuary in Texas, USA. Catch data from seines indicated that the abundances of age-0 red drum and spotted seatrout were …


Intermittent Fasting And Metabolic Health: From Religious Fast To Time-Restricted Feeding, Kristin K. Hoddy, Kara L. Marlatt, Hatice Çetinkaya, Eric Ravussin Jul 2020

Intermittent Fasting And Metabolic Health: From Religious Fast To Time-Restricted Feeding, Kristin K. Hoddy, Kara L. Marlatt, Hatice Çetinkaya, Eric Ravussin

Clinical Research Faculty Publications

Over the past 10 to 15 years, intermittent fasting has emerged as an unconventional approach to reduce body weight and improve metabolic health beyond simple calorie restriction. In this review, we summarize findings related to Ramadan and Sunnah fasting. We then discuss the role of caloric restriction not only as an intervention for weight control, but importantly, as a strategy for healthy aging and longevity. Finally, we review the four most common intermittent fasting (IF) strategies used to date for weight management and to improve cardiometabolic health. Weight loss is common after IF but does not appear to be different …


Breastfeeding And Childhood Obesity: A 12-Country Study, Jian Ma, Yijuan Qiao, Pei Zhao, Wei Li, Peter T. Katzmarzyk, Jean Philippe Chaput, Mikael Fogelholm, Rebecca Kuriyan, Estelle V. Lambert, Carol Maher, Jose Maia, Victor Matsudo, Timothy Olds, Vincent Onywera, Olga L. Sarmiento, Martyn Standage, Mark S. Tremblay, Catrine Tudor-Locke, Gang Hu Jul 2020

Breastfeeding And Childhood Obesity: A 12-Country Study, Jian Ma, Yijuan Qiao, Pei Zhao, Wei Li, Peter T. Katzmarzyk, Jean Philippe Chaput, Mikael Fogelholm, Rebecca Kuriyan, Estelle V. Lambert, Carol Maher, Jose Maia, Victor Matsudo, Timothy Olds, Vincent Onywera, Olga L. Sarmiento, Martyn Standage, Mark S. Tremblay, Catrine Tudor-Locke, Gang Hu

Population and Public Health Science Faculty Publications

This study aimed to examine the association between breastfeeding and childhood obesity. A multinational cross-sectional study of 4,740 children aged 9–11 years was conducted from 12 countries. Infant breastfeeding was recalled by parents or legal guardians. Height, weight, waist circumference, and body fat were obtained using standardized methods. The overall prevalence of obesity, central obesity, and high body fat were 12.3%, 9.9%, and 8.1%, respectively. After adjustment for maternal age at delivery, body mass index (BMI), highest maternal education, history of gestational diabetes, gestational age, and child's age, sex, birth weight, unhealthy diet pattern scores, moderate-to-vigorous physical activity, sleeping, and …


Genetic Susceptibility, Lifestyle Intervention And Glycemic Changes Among Women With Prior Gestational Diabetes, Zhaoxia Liang, Leishen Wang, Huikun Liu, Yuhang Chen, Tao Zhou, Yoriko Heianza, Junhong Leng, Weiqin Li, Xilin Yang, Yun Shen, Ru Gao, Gang Hu, Lu Qi Jul 2020

Genetic Susceptibility, Lifestyle Intervention And Glycemic Changes Among Women With Prior Gestational Diabetes, Zhaoxia Liang, Leishen Wang, Huikun Liu, Yuhang Chen, Tao Zhou, Yoriko Heianza, Junhong Leng, Weiqin Li, Xilin Yang, Yun Shen, Ru Gao, Gang Hu, Lu Qi

Population and Public Health Science Faculty Publications

Aims: Women with prior gestational diabetes mellitus (GDM) or high genetic susceptibility are prone to development of type 2 diabetes. We examined whether a lifestyle intervention modified the genetic effect on changes in glycemic markers among women with prior GDM. Research design and methods: This study included 560 women with prior GDM from a randomized controlled trial, the Tianjin Gestational Diabetes Mellitus Prevention Program, who were assigned into an intervention arm (improved physical activity and healthy dietary intakes) or a control arm. We assessed associations of GDM related genetic variants in/near the CDKAL1 (rs7754840) and MTNR1B (rs10830962) genes with changes …


Daily Branched-Chain Amino Acid Intake And Risks Of Obesity And Insulin Resistance In Children: A Cross-Sectional Study, Jun Lu, Yuying Gu, Huikun Liu, Leishen Wang, Wei Li, Weiqin Li, Junhong Leng, Shuang Zhang, Lu Qi, Xilin Yang, Gang Hu Jul 2020

Daily Branched-Chain Amino Acid Intake And Risks Of Obesity And Insulin Resistance In Children: A Cross-Sectional Study, Jun Lu, Yuying Gu, Huikun Liu, Leishen Wang, Wei Li, Weiqin Li, Junhong Leng, Shuang Zhang, Lu Qi, Xilin Yang, Gang Hu

Population and Public Health Science Faculty Publications

Objective: This study aimed to investigate the association of daily branched-chain amino acid (BCAA) intake with the risks of obesity and insulin resistance in children of mothers with gestational diabetes mellitus (GDM). Methods: Daily BCAA intake was calculated by using a validated food frequency questionnaire in 996 children of mothers with GDM. The odds ratios (ORs) (95% CI) of childhood obesity and insulin resistance were obtained using logistic regression models. Results: The multivariable-adjusted ORs for overweight and insulin resistance increased across quartiles of daily BCAA intake (P < 0.05 for trend). Multivariable-adjusted ORs for each 1-SD increase in BCAA intake were 1.37 (1.16-1.62) for overweight and 1.19 (1.02-1.38) for insulin resistance. After additional adjustment of children’s daily total energy intake, the OR was still significant for overweight risk but no longer significant for insulin resistance. There were positive associations of daily leucine, isoleucine, and valine intake with the risks for overweight and insulin resistance. Conclusions: Daily BCAA intake was associated with increased risks for overweight and insulin resistance in children of mothers with GDM, but this association was not fully independent of children’s daily energy intake. Restriction in dietary BCAA may help prevent childhood obesity and insulin resistance.


Change And Stability In Sibling Physical Fitness: The Portuguese Sibling Study, Sara Pereira, Peter T. Katzmarzyk, Donald Hedeker, José Maia Jul 2020

Change And Stability In Sibling Physical Fitness: The Portuguese Sibling Study, Sara Pereira, Peter T. Katzmarzyk, Donald Hedeker, José Maia

Population and Public Health Science Faculty Publications

Purpose This study aims to 1) describe mean changes in muscular and motor fitness components in sibships over 2 yr, 2) analyze individual tracking of fitness within sibships, 3) investigate sibling resemblance in fitness over time, and 4) examine the joint influence of biological, behavioral, and familial characteristics on fitness. Methods The sample comprises 166 Portuguese biological sibling pairs (brother-brother, sister-sister, brother-sister) age 9-17 yr assessed at baseline and 2 yr later. Physical fitness components were measured with standardized tests. Percentage body fat and biological maturation were assessed, and physical activity, diet, screen time, and familial characteristics were obtained by …


Exercise Training Rapidly Increases Hepatic Insulin Extraction In Nafld, Adithya Hari, Ciaràn E. Fealy, Christopher L. Axelrod, Jacob M. Haus, Chris A. Flask, Arthur J. Mccullough, John P. Kirwan Jul 2020

Exercise Training Rapidly Increases Hepatic Insulin Extraction In Nafld, Adithya Hari, Ciaràn E. Fealy, Christopher L. Axelrod, Jacob M. Haus, Chris A. Flask, Arthur J. Mccullough, John P. Kirwan

Division of Basic Science Faculty Publications

Purpose We aimed to determine the immediacy of exercise intervention on liver-specific metabolic processes in nonalcoholic fatty liver disease. Methods We undertook a short-term (7-d) exercise training study (60 min·d-1 treadmill walking at 80%-85% of maximal heart rate) in obese adults (N = 13, 58 ± 3 yr, 34.3 ± 1.1 kg·m-2, >5% hepatic lipid by 1H-magnetic resonance spectroscopy). Insulin sensitivity index was estimated by oral glucose tolerance test using the Soonthorpun model. Hepatic insulin extraction (HIE) was calculated as the molar difference in area under the curve (AUC) for insulin and C-peptide (HIE = 1-(AUCInsulin/AUCC-Pep)). Results The increases in …


Rationale And Study Design For Lifestyle Intervention In Preparation For Pregnancy (Lipp): A Randomized Controlled Trial, M. L. Erickson, J. T. Mey, C. L. Axelrod, D. Paul, L. Gordesky, K. Russell, H. Barkoukis, P. O'Tierney-Ginn, R. A. Fielding, J. P. Kirwan, P. M. Catalano Jul 2020

Rationale And Study Design For Lifestyle Intervention In Preparation For Pregnancy (Lipp): A Randomized Controlled Trial, M. L. Erickson, J. T. Mey, C. L. Axelrod, D. Paul, L. Gordesky, K. Russell, H. Barkoukis, P. O'Tierney-Ginn, R. A. Fielding, J. P. Kirwan, P. M. Catalano

Division of Basic Science Faculty Publications

Introduction: Maternal obesity increases neonatal risk for obesity and metabolic syndrome later in life. Prior attempts to break this intergenerational obesity cycle by limiting excessive gestational weight gain have failed to reduce neonatal adiposity. Alternatively, pre-conception lifestyle interventions may improve the in utero metabolic milieu during early pregnancy leading to improved fetal outcomes. This randomized controlled trial (RCT) is evaluating whether a lifestyle intervention to reduce weight and improve maternal metabolism in preparation for pregnancy (LIPP) attenuates neonatal adiposity, compared to standard medical advice. Material and methods: Overweight/class 1 obese women after a previous pregnancy, ~12 weeks postpartum, preparing for …


The Genetic And Cultural Evolution Of Unsustainability, Brian F. Snyder Jul 2020

The Genetic And Cultural Evolution Of Unsustainability, Brian F. Snyder

Faculty Publications

Anthropogenic changes are accelerating and threaten the future of life on earth. While the proximate mechanisms of these anthropogenic changes are well studied (e.g., climate change, biodiversity loss, population growth), the evolutionary causality of these anthropogenic changes have been largely ignored. Anthroecological theory (AET) proposes that the ultimate cause of anthropogenic environmental change is multi-level selection for niche construction and ecosystem engineering. Here, we integrate this theory with Lotka’s Maximum Power Principle and propose a model linking energy extraction from the environment with genetic, technological and cultural evolution to increase human ecosystem carrying capacity. Carrying capacity is partially determined by …


River Avulsions And Sedimentary Evolution Of The Luanhe Fan-Delta System (North China) Since The Late Pleistocene, Lei He, Alessandro Amorosi, Siyuan Ye, Chunting Xue, Shixiong Yang, Edward A. Laws Jul 2020

River Avulsions And Sedimentary Evolution Of The Luanhe Fan-Delta System (North China) Since The Late Pleistocene, Lei He, Alessandro Amorosi, Siyuan Ye, Chunting Xue, Shixiong Yang, Edward A. Laws

Faculty Publications

The Luanhe Fan-Delta (LFD) is one of the most important coastal deltas in North China. Numerous investigations on the late Quaternary evolution of this fan-delta system have been implemented during the 1980s. However, few detailed sedimentologic studies have been undertaken. Based on comprehensive analysis of sedimentary facies, grain size, microfossils, radiocarbon dates (AMS14C) and optically stimulated luminescence (OSL) ages from three ~30 m-long cores, along with recent reports from a series of cores and seismic profiles from the coastal areas, we reconstructed the detailed late Quaternary sedimentary evolution of the northern Bohai coast, which evolved from a coastal …


Current Status Of The Multinational Arabidopsis Community, Geraint Parry, Geraint Parry, Nicholas J. Provart, Nicholas J. Provart, Siobhan M. Brady, Siobhan M. Brady, Baris Uzilday, Keith Adams, Wagner Araújo, Sébastien Aubourg, Sacha Baginsky, Erica Bakker, Katja Bärenfaller, Jacqui Batley, Mike Beale, Mark Beilstein, Youssef Belkhadir, Tanya Berardini, Joy Bergelson, Francisca Blanco-Herrera, Hans Peter Braun, Steve Briggs, Lynette Brownfield, Maura Cardarelli, Marcos Castellanos-Uribe, Gloria Coruzzi, Maheshi Dassanayake, Geert De Jaeger, Brian Dilkes, Colleen Doherty, Joe Ecker, Pat Edger, David Edwards Jul 2020

Current Status Of The Multinational Arabidopsis Community, Geraint Parry, Geraint Parry, Nicholas J. Provart, Nicholas J. Provart, Siobhan M. Brady, Siobhan M. Brady, Baris Uzilday, Keith Adams, Wagner Araújo, Sébastien Aubourg, Sacha Baginsky, Erica Bakker, Katja Bärenfaller, Jacqui Batley, Mike Beale, Mark Beilstein, Youssef Belkhadir, Tanya Berardini, Joy Bergelson, Francisca Blanco-Herrera, Hans Peter Braun, Steve Briggs, Lynette Brownfield, Maura Cardarelli, Marcos Castellanos-Uribe, Gloria Coruzzi, Maheshi Dassanayake, Geert De Jaeger, Brian Dilkes, Colleen Doherty, Joe Ecker, Pat Edger, David Edwards

Faculty Publications

The multinational Arabidopsis research community is highly collaborative and over the past thirty years these activities have been documented by the Multinational Arabidopsis Steering Committee (MASC). Here, we (a) highlight recent research advances made with the reference plant Arabidopsis thaliana; (b) provide summaries from recent reports submitted by MASC subcommittees, projects and resources associated with MASC and from MASC country representatives; and (c) initiate a call for ideas and foci for the “fourth decadal roadmap,” which will advise and coordinate the global activities of the Arabidopsis research community.


Fully Automated Pipeline For Body Composition Estimation From 3d Optical Scans Using Principal Component Analysis: A Shape Up Study, Sima Sobhiyeh, Nathan Borel, Marcelline Dechenaud, Clinten A. Graham, Michael Wong, Peter Wolenski, John Shepherd, Steven B. Heymsfield Jul 2020

Fully Automated Pipeline For Body Composition Estimation From 3d Optical Scans Using Principal Component Analysis: A Shape Up Study, Sima Sobhiyeh, Nathan Borel, Marcelline Dechenaud, Clinten A. Graham, Michael Wong, Peter Wolenski, John Shepherd, Steven B. Heymsfield

Faculty Publications

The increasing prevalence and adaptability of 3D optical scan (3DO) technology has invoked many recent studies which use 3DO scanning as a convenient and inexpensive means for predicting body composition and health risks. The Shape Up studies seek a device-agnostic solution for body composition estimation based on principal component analysis (PCA). This paper reports a progress made on Shape Up's previous work which served as a criterion analysis for PCA-based body composition and health risk prediction. This study presents proof-of-concept for a novel automated landmark detection step that allows for a fully automated PCA-based approach to body composition estimation that …


A Late Eocene-Oligocene Through-Flowing River Between The Upper Yangtze And South China Sea, Peter D. Clift, Andrew Carter, Anna Wysocka, Long Van Hoang, Hongbo Zheng, Nikki Neubeck Jul 2020

A Late Eocene-Oligocene Through-Flowing River Between The Upper Yangtze And South China Sea, Peter D. Clift, Andrew Carter, Anna Wysocka, Long Van Hoang, Hongbo Zheng, Nikki Neubeck

Faculty Publications

©2020. American Geophysical Union. All Rights Reserved. We test the hypothesis of a major Paleogene river draining the SE Tibetan Plateau and the central modern Yangtze Basin that then flowed south to the South China Sea. We test this model using U-Pb dated detrital zircon grains preserved in Paleogene sedimentary rocks in northern Vietnam and SW China. We applied a series of statistical tests to compare the U-Pb age spectra of the rocks in order to highlight differences and similarities between them and with potential source bedrocks. Monte Carlo mixing models imply that erosion was dominantly derived from the Indochina …


Improvement Of Ti/Tin Interfacial Shear Strength By Doping – A First Principles Density Functional Theory Study, Abu Shama Mohammad Miraz, Eboni Williams, W. J. Meng, Bala R. Ramachandran, Collin D. Wick Jul 2020

Improvement Of Ti/Tin Interfacial Shear Strength By Doping – A First Principles Density Functional Theory Study, Abu Shama Mohammad Miraz, Eboni Williams, W. J. Meng, Bala R. Ramachandran, Collin D. Wick

Faculty Publications

The dependence of interfacial shear resistance on the substitutional doping of Al, V and Cr at the Ti/TiN interface was studied using first principles Density Functional Theory. Only Al dopants had negative enthalpies of mixing in Ti and at the Ti/TiN interface. Generalized stacking fault energies (GSFE) were calculated and their barriers were used as an estimate of shear resistance. The addition of Al increased the GSFE barriers of pure Ti when they were in adjacent atomic layers. It was found that when Al atoms were in contact, they had a destabilizing effect that led to the increased barriers in …


Driver Compliance And Safety Effects Of Three-Foot Bicycle Passing Laws, Nelida Herrera, Scott A. Parr, Brian Wolshon Jul 2020

Driver Compliance And Safety Effects Of Three-Foot Bicycle Passing Laws, Nelida Herrera, Scott A. Parr, Brian Wolshon

Faculty Publications

The long and tragic history of bicycle/vehicle collisions has led to calls for legislative action to provide greater safety for bicyclists on the roadways. In the United States, “Three-foot bicycle passing laws,” are among the most common. In general, these laws require motor vehicles overtaking or passing bicyclists to do so by providing a minimum of 3 ft of lateral separation. The goal of this paper was to investigate how these laws substantively affect driver behavior. In this paper, a driving simulator was used to quantify the overtaking behavior, in terms of lateral overtaking distance and speed, of drivers in …


Components Of Psychological Flexibility And Inflexibility That Predict Risk-Taking Behaviors, Shelley Renee Upton Jul 2020

Components Of Psychological Flexibility And Inflexibility That Predict Risk-Taking Behaviors, Shelley Renee Upton

LSU Doctoral Dissertations

Psychological flexibility is conceptualized as contact with the present moment and the ability to persist or change one’s behavior to achieve valued ends. The opposite of this process is known as psychological inflexibility, which is posited to lead to the development and maintenance of various psychological disorders. There are 6 components underlying psychological inflexibility—these are cognitive fusion, experiential avoidance, fixating on the past or future, self-conceptualization, lacking contact with values, and inaction toward valued ends, as well as 6 components underlying psychological flexibility (i.e., defusion, acceptance, present moment awareness, self-as-context, contact with values, and committed action). Psychological inflexibility may be …


Reshaping An Earthly Paradise: Land Enclosure And Bavarian State Centralization (1779-1835), Gregory Devoe Tomlinson Jul 2020

Reshaping An Earthly Paradise: Land Enclosure And Bavarian State Centralization (1779-1835), Gregory Devoe Tomlinson

LSU Doctoral Dissertations

Abstract

The Electoral state of Bavaria was reformed through a comprehensive project of land-based allodification (the creation of a distinction between privileged titles and property designations) through the process of “redemption” beginning in 1799. This process was previously impeded by the strength of landholding estates that included notables and the Catholic Church. In addition, Electoral Bavarian leaders lacked centralized control. Civil servants, known as cameralists, mediated political and economic interactions between these estates. The economy was based on subsistence and the productive capacity of Gutsherrschaft, a manorial system based on regional jurisdiction and rent collection by notables who largely did …


Social Capitalization As A Positive Emotion Regulation Strategy In Individuals At-Risk For Developing A Schizophrenia-Spectrum Disorder, Elana Klein Schwartz Jul 2020

Social Capitalization As A Positive Emotion Regulation Strategy In Individuals At-Risk For Developing A Schizophrenia-Spectrum Disorder, Elana Klein Schwartz

LSU Doctoral Dissertations

Extant literature indicates that emotional deficits, such as impaired emotion expression/experience, are prominent in schizophrenia-spectrum psychopathology and linked with poorer functional (e.g. social) outcomes. Interestingly, individuals exhibiting schizotypy, an underlying personality organization that confers a vulnerability to developing schizophrenia, report more abnormalities in emotion experience compared to healthy controls and individuals with schizophrenia, a phenomenon termed the “schizophrenia-spectrum emotion paradox.” To aid in the clarification of emotional abnormalities and explore the dynamic nature of emotion experience in individuals with schizotypy, the present study enrolled 93 college-aged individuals to examine positive emotion regulation through the use of social capitalization. In social …


Sperm Decondensation And Male Pronuclear Formation In Bovine Intracytoplasmic Sperm Injection, Lauren Gatenby Jun 2020

Sperm Decondensation And Male Pronuclear Formation In Bovine Intracytoplasmic Sperm Injection, Lauren Gatenby

LSU Master's Theses

This study assessed the effects both DTT and progesterone have on bovine spermatozoa to induce decondensation or the acrosome reaction in order to facilitate male pronuclear formation after ICSI. Sperm prepared by swim-up in a 5 mM concentration of DTT displayed time dependent morphological changes resulting in decondensation over a 6-hour period. An estimated 90% of treated sperm displayed early changes in morphology after the second hour of incubation. Sperm displaying partial decondensation of the nucleus was estimated as 42% by the 3rd hour and increased to 62% by the 5th hour of incubation. Fully decondensed sperm or …


Visualization Of Brown Fat Using X-Ray Dark Field Imaging, Troy D. Jacobs Jun 2020

Visualization Of Brown Fat Using X-Ray Dark Field Imaging, Troy D. Jacobs

LSU Master's Theses

Introduction: Obesity has become a major societal issue. Many researchers are looking for ways to combat this growing epidemic. Brown adipose tissue (BAT) might be a way to help individuals overcome the challenges associated with weight loss and maintenance of weight loss, but a better understanding of BAT and how to control and utilize it is needed. BAT differs from white adipose tissue (WAT) in that BAT is rich with mitochondria and therefore is metabolically active. BAT is a source of non-shivering thermogenesis and can be activated both by cold exposure and pharmacologically. Current methods of assessing BAT activity are …


Assessing Breastfeeding Knowledge, Attitudes And Intention Among Adult Female Undergraduate And Graduate Students, Kritee Niroula Jun 2020

Assessing Breastfeeding Knowledge, Attitudes And Intention Among Adult Female Undergraduate And Graduate Students, Kritee Niroula

LSU Master's Theses

This study measured the breastfeeding knowledge, attitude and intention of adult female students of Louisiana State University. Participants (n=1039; mean age 20.12 ± 3.122 years) were recruited to complete the questionnaire. Racial/ethnic representation was White (76.1%), African American (14.3%), Asian (5.5%), American Indian/ Alaska Native or Native Hawaiian/ Pacific Islander (0.8%) and Multi-racial (3.3%). The questionnaire was used to deliver a set of knowledge, attitude and intention items. Participants were evaluated based on their scores in each section. The questionnaire was pilot tested among five students for comprehensibility and understandability and necessary changes were made according to their suggestions. The …


Self-Healing Composite Of Thermoset Polymer And Programmed Super Contraction Fibers, Guoqiang Li, Harper Meng Jun 2020

Self-Healing Composite Of Thermoset Polymer And Programmed Super Contraction Fibers, Guoqiang Li, Harper Meng

College of Engineering Patents

A composition comprising thermoset polymer, shape memory polymer to facilitate macro scale damage closure, and a component for molecular scale healing has the ability to repair structural defects by a bio-mimetic, close-then-heal process. The shape memory polymer serves to bring surfaces of a structural defect into proximity, after which the healing component moves into the defect and provides molecular scale healing. The component for molecular scale healing can be a thermoplastic, such as fibers, particles or spheres, which are heated to or above the thermoplastic's melting point, and then the composition is cooled below that melting temperature. The compositions can …


Data-Driven And Model-Based Methods With Physics-Guided Machine Learning For Damage Identification, Zhiming Zhang Jun 2020

Data-Driven And Model-Based Methods With Physics-Guided Machine Learning For Damage Identification, Zhiming Zhang

LSU Doctoral Dissertations

Structural health monitoring (SHM) has been widely used for structural damage diagnosis and prognosis of a wide range of civil, mechanical, and aerospace structures. SHM methods are generally divided into two categories: (1) model-based methods; (2) data-driven methods. Compared with data-driven SHM, model-based methods provide an updated physics-based numerical model that can be used for damage prognosis when long-term data is available. However, the performance of model-based methods is susceptible to modeling error in establishing the numerical model, which is usually unavoidable due to model simplification and omission. The major challenge of data-driven SHM methods lies in data insufficiency, e.g., …


Investigating Leadership Styles Of Childcare Directors, Michelle P. Grantham-Caston Jun 2020

Investigating Leadership Styles Of Childcare Directors, Michelle P. Grantham-Caston

LSU Doctoral Dissertations

The aim of this study was to contribute to the literature on childcare director’s leadership styles and director’s self-perception. For leaders in childcare to be effective they must possess skills, characteristics, and traits of effective leadership which have been identified in the seminal literature of Bass (1995) and Burns (1979). This quantitative study examined early childhood leaders self-identification with the leadership styles in The Multifactor Leadership Questionnaire (MLQ) (Bass & Avolio, 1995) as well as other demographic variables which could contribute to early childhood leaders’ self-perception of leadership styles. This study was to break apart the three overarching leadership styles …


Brominated Carbon Materials As Positive Electrodes For Nonaqueous Secondary Lithium-Bromine Batteries, Benjamin Beau Peterson Jun 2020

Brominated Carbon Materials As Positive Electrodes For Nonaqueous Secondary Lithium-Bromine Batteries, Benjamin Beau Peterson

LSU Doctoral Dissertations

Secondary lithium-bromine (Li-Br2) batteries have theoretical potentials near 4.1 V vs Li/Li+ and capacities more than 2 times greater than conventional Li-ion batteries. Herein, secondary, non-aqueous Li-Br2 half-cell batteries are reported using a Li metal anode, carbon-coated glass fiber separator, non-aqueous Li-based electrolytes with and without the addition of lithium bromine (LiBr) salt, and positive electrodes consisting of either chemically brominated non-graphitic carbon or carbon derived from the carbonization of metal-organic frameworks (MOFs) with LiBr embedded into the micro- and mesopores of the carbon matrix. The separator is effective in mitigating the transport of Br2 …


Antimicrobial Strategies For Topical Applications, Kelsey Marie Lopez Jun 2020

Antimicrobial Strategies For Topical Applications, Kelsey Marie Lopez

LSU Doctoral Dissertations

Bacteria can thrive in diverse environments and are often harmless or beneficial. Bacteria in digestive tracts is one example of beneficial bacteria; however, bacteria can be harmful and when this type proliferates, it can cause infections within hosts. Bacterial infections are easily treated with antibiotics in most cases. However, bacteria are also capable of developing mutations which could cause them to become multi-drug resistant and eventually, “superbugs.” Therefore, the development of novel antimicrobial agents and materials capable of combating drug-resistant bacteria is necessary. Research presented in this dissertation focuses on different strategies for minimizing and preventing topical bacterial infections using …


Log File-Based Dose Reconstruction To Moving Targets During Lung Stereotactic Body Radiation Therapy, Andrew S. Mcguffey Jun 2020

Log File-Based Dose Reconstruction To Moving Targets During Lung Stereotactic Body Radiation Therapy, Andrew S. Mcguffey

LSU Master's Theses

Purpose: To perform film-based verification of 4D dose reconstruction to moving targets during lung stereotactic body radiation therapy (SBRT).

Introduction: Current patient-specific quality assurance measures to test deliverability of plans with dynamic intensity modulation involve delivering beams to static measurement device and comparing the planned dose to measurement. However, motion-induced dose errors are not detected with static measurement. Previous studies have investigated combining machine log data with respiratory tracking to determine moving-target dose. By combining machine log data with anatomic and density information at each breathing phase from 4D-CT, intrafraction anatomical deformation due to respiration may be accounted for. However, …


Predictions For The Cosmic Microwave Background From An Anisotropic Quantum Bounce, Ivan Agullo, Javier Olmedo, V. Sreenath Jun 2020

Predictions For The Cosmic Microwave Background From An Anisotropic Quantum Bounce, Ivan Agullo, Javier Olmedo, V. Sreenath

Faculty Publications

We introduce an extension of the standard inflationary paradigm on which the big bang singularity is replaced by an anisotropic bounce. Unlike in the big bang model, cosmological perturbations find an adiabatic regime in the past. We show that this scenario accounts for the observed quadrupolar modulation in the temperature anisotropies of the cosmic microwave background, and we make predictions for the polarization angular correlation functions E-E, B-B, and E-B, together with temperature-polarization correlations T-B and T-E, that can be used to test our ideas. We base our calculations on the bounce predicted by loop quantum cosmology, but our techniques …


Search For Nova Presolar Grains: Γ -Ray Spectroscopy Of Ar 34 And Its Relevance For The Astrophysical Cl 33 (P,Γ) Reaction, A. R.L. Kennington, G. Lotay, D. T. Doherty, D. Seweryniak, C. Andreoiu, K. Auranen, M. P. Carpenter, W. N. Catford, C. M. Deibel, K. Hadyńska-Klȩk, S. Hallam, D. E.M. Hoff, T. Huang, R. V.F. Janssens, S. Jazrawi, J. José, F. G. Kondev, T. Lauritsen, J. Li, A. M. Rogers, J. Saiz, G. Savard, S. Stolze, G. L. Wilson, S. Zhu Jun 2020

Search For Nova Presolar Grains: Γ -Ray Spectroscopy Of Ar 34 And Its Relevance For The Astrophysical Cl 33 (P,Γ) Reaction, A. R.L. Kennington, G. Lotay, D. T. Doherty, D. Seweryniak, C. Andreoiu, K. Auranen, M. P. Carpenter, W. N. Catford, C. M. Deibel, K. Hadyńska-Klȩk, S. Hallam, D. E.M. Hoff, T. Huang, R. V.F. Janssens, S. Jazrawi, J. José, F. G. Kondev, T. Lauritsen, J. Li, A. M. Rogers, J. Saiz, G. Savard, S. Stolze, G. L. Wilson, S. Zhu

Faculty Publications

The discovery of presolar grains in primitive meteorites has initiated a new era of research in the study of stellar nucleosynthesis. However, the accurate classification of presolar grains as being of specific stellar origins is particularly challenging. Recently, it has been suggested that sulfur isotopic abundances may hold the key to definitively identifying presolar grains with being of nova origins and, in this regard, the astrophysical Cl33(p,γ)Ar34 reaction is expected to play a decisive role. As such, we have performed a detailed γ-ray spectroscopy study of Ar34. Excitation energies have been measured with high precision and spin-parity assignments for resonant …


Molecular Transducers Of Physical Activity Consortium (Motrpac): Mapping The Dynamic Responses To Exercise, James A. Sanford, Christopher D. Nogiec, Malene E. Lindholm, Joshua N. Adkins, David Amar, Surendra Dasari, Jonelle K. Drugan, Facundo M. Fernández, Facundo M. Fernández, Shlomit Radom-Aizik, Simon Schenk, Michael P. Snyder, Russell P. Tracy, Patrick Vanderboom, Scott Trappe, Martin J. Walsh, Charles R. Evans, Yafeng Li, Lyl Tomlinson, D. Lee Alekel, Iddil Bekirov, Amanda T. Boyce, Josephine Boyington, Jerome L. Fleg, Lyndon J.O. Joseph, Maren R. Laughlin, Padma Maruvada, Stephanie A. Morris, Joan A. Mcgowan, Concepcion Nierras, Vinay Pai, Charlotte Peterson, Ed Ramos, Mary C. Roary Jun 2020

Molecular Transducers Of Physical Activity Consortium (Motrpac): Mapping The Dynamic Responses To Exercise, James A. Sanford, Christopher D. Nogiec, Malene E. Lindholm, Joshua N. Adkins, David Amar, Surendra Dasari, Jonelle K. Drugan, Facundo M. Fernández, Facundo M. Fernández, Shlomit Radom-Aizik, Simon Schenk, Michael P. Snyder, Russell P. Tracy, Patrick Vanderboom, Scott Trappe, Martin J. Walsh, Charles R. Evans, Yafeng Li, Lyl Tomlinson, D. Lee Alekel, Iddil Bekirov, Amanda T. Boyce, Josephine Boyington, Jerome L. Fleg, Lyndon J.O. Joseph, Maren R. Laughlin, Padma Maruvada, Stephanie A. Morris, Joan A. Mcgowan, Concepcion Nierras, Vinay Pai, Charlotte Peterson, Ed Ramos, Mary C. Roary

Clinical Research Faculty Publications

The Molecular Transducers of Physical Activity Consortium aims to create a comprehensive, integrative multi-omic map of the effects of exercise across tissues in rodents and healthy people.