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The Expected Behaviors Of Posterior Predictive Tests And Their Unexpected Interpretation, Luiza Guimarães Fabreti, Lyndon M. Coghill, Robert C. Thomson, Sebastian Höhna, Jeremy M. Brown Mar 2024

The Expected Behaviors Of Posterior Predictive Tests And Their Unexpected Interpretation, Luiza Guimarães Fabreti, Lyndon M. Coghill, Robert C. Thomson, Sebastian Höhna, Jeremy M. Brown

Faculty Publications

Poor fit between models of sequence or trait evolution and empirical data is known to cause biases and lead to spurious conclusions about evolutionary patterns and processes. Bayesian posterior prediction is a flexible and intuitive approach for detecting such cases of poor fit. However, the expected behavior of posterior predictive tests has never been characterized for evolutionary models, which is critical for their proper interpretation. Here, we show that the expected distribution of posterior predictive P-values is generally not uniform, in contrast to frequentist P-values used for hypothesis testing, and extreme posterior predictive P-values often provide more evidence of poor …

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Identification Of A Chondrocyte-Specific Enhancer In The Hoxc8 Gene, Stephania A. Cormier, Claudia Kappen Mar 2024

Identification Of A Chondrocyte-Specific Enhancer In The Hoxc8 Gene, Stephania A. Cormier, Claudia Kappen

Division of Basic Science Faculty Publications

Hox genes encode transcription factors whose roles in patterning animal body plans during embryonic development are well-documented. Multiple studies demonstrate that Hox genes continue to act in adult cells, in normal differentiation, in regenerative processes, and, with abnormal expression, in diverse types of cancers. However, surprisingly little is known about the regulatory mechanisms that govern Hox gene expression in specific cell types, as they differentiate during late embryonic development, and in the adult organism. The murine Hoxc8 gene determines the identity of multiple skeletal elements in the lower thoracic and lumbar region and continues to play a role in the …

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Using Risk Ratios To Quantify Potential Behavior-Environment Relations, P. Raymond Joslyn, Samuel L. Morris Mar 2024

Using Risk Ratios To Quantify Potential Behavior-Environment Relations, P. Raymond Joslyn, Samuel L. Morris

Faculty Publications

Behavior-environment functional relations are the units of explanation in applied behavior analysis (ABA). Whether hypothesized experimentally or descriptively, quantification of putative functional relations improves our ability to predict and influence behavior. Risk ratios are an accessible, straightforward quantitative analysis that can serve this purpose. They have been employed to great effect in other fields (e.g., medicine, public health), but are rarely used within ABA. In this tutorial, we describe risk ratios and how they are calculated, discuss why risk ratios are well suited for quantifying behavior–environment relations, and illustrate their utility and applicability across five demonstrations from real clinical cases. …

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Harmonized Multisite Mri-Based Quantification Of Human Liver Fat And Stiffness: A Pilot Study, Owen T. Carmichael, Maninder Singh, Adil Bashir, Anne M. Russell, Mark Bolding, David T. Redden, Judd Storrs, William R. Willoughby, Candace Howard-Claudio, Daniel S. Hsia, Robert P. Kimberly, Meagan E. Gray, Eric Ravussin, Thomas S. Denney Mar 2024

Harmonized Multisite Mri-Based Quantification Of Human Liver Fat And Stiffness: A Pilot Study, Owen T. Carmichael, Maninder Singh, Adil Bashir, Anne M. Russell, Mark Bolding, David T. Redden, Judd Storrs, William R. Willoughby, Candace Howard-Claudio, Daniel S. Hsia, Robert P. Kimberly, Meagan E. Gray, Eric Ravussin, Thomas S. Denney

Clinical Research Faculty Publications

Background: Nonalcoholic fatty liver disease (NAFLD) is a leading cause of end-stage liver disease. NAFLD diagnosis and follow-up relies on a combination of clinical data, liver imaging, and/or liver biopsy. However, intersite imaging differences impede diagnostic consistency and reduce the repeatability of the multisite clinical trials necessary to develop effective treatments. Purpose/Hypothesis: The goal of this pilot study was to harmonize commercially available 3 T magnetic resonance imaging (MRI) measurements of liver fat and stiffness in human participants across academic sites and MRI vendors. Study Type: Cohort. Subjects: Four community-dwelling adults with obesity. Field strength/Sequence: 1.5 and 3 T, multiecho …

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Predictors Of Racial Differences In Weight Loss: The Propel Trial, Robert L. Newton, Dachaun Zhang, William D. Johnson, Corby K. Martin, John W. Apolzan, Kara D. Denstel, Phillip J. Brantley, Terry C. Davis, Connie Arnold, Daniel F. Sarpong, Eboni G. Price-Haywood, Carl J. Lavie, Tina K. Thethi, Peter T. Katzmarzyk Mar 2024

Predictors Of Racial Differences In Weight Loss: The Propel Trial, Robert L. Newton, Dachaun Zhang, William D. Johnson, Corby K. Martin, John W. Apolzan, Kara D. Denstel, Phillip J. Brantley, Terry C. Davis, Connie Arnold, Daniel F. Sarpong, Eboni G. Price-Haywood, Carl J. Lavie, Tina K. Thethi, Peter T. Katzmarzyk

Clinical Research Faculty Publications

Objective: Studies have consistently shown that African American individuals lose less weight in response to behavioral interventions, but the mechanisms leading to this result have been understudied. Methods: Data were derived from the PROmoting Successful Weight Loss in Primary CarE in Louisiana (PROPEL) study, which was a cluster-randomized, two-arm trial conducted in primary care clinics. In the PROPEL trial, African American individuals lost less weight compared with patients who belonged to other racial groups after 24 months. In the current study, counterfactual mediation analyses among 445 patients in the intervention arm of PROPEL were used to determine which variables mediated …

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Exercise-Induced Changes In Central Adiposity During An Rct: Effect Of Exercise Dose And Associations With Compensation, James L. Dorling, John W. Apolzan, Neil M. Johannsen, Diana M. Thomas, Christoph Höchsmann, Daniel S. Hsia, Corby K. Martin Mar 2024

Exercise-Induced Changes In Central Adiposity During An Rct: Effect Of Exercise Dose And Associations With Compensation, James L. Dorling, John W. Apolzan, Neil M. Johannsen, Diana M. Thomas, Christoph Höchsmann, Daniel S. Hsia, Corby K. Martin

Clinical Research Faculty Publications

Context: Exercise can decrease central adiposity, but the effect of exercise dose and the relationship between central adiposity and exercise-induced compensation is unclear. Objective: Test the effect of exercise dose on central adiposity change and the association between central adiposity and exercise-induced weight compensation. Methods: In this ancillary analysis of a 6-month randomized controlled trial, 170 participants with overweight or obesity (mean ± SD body mass index: 31.5 ± 4.7 kg/m2) were randomized to a control group or exercise groups that reflected exercise recommendations for health (8 kcal/kg/ week [KKW]) or weight loss and weight maintenance (20 KKW). Waist circumference …

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Genome-Wide Polygenic Risk Score For Ckd In Individuals With Apol1 High-Risk Genotypes, Ha My T. Vy, Steven G. Coca, Ashwin Sawant, Ankit Sakhuja, Orlando M. Gutierrez, Richard Cooper, Ruth J.F. Loos, Carol R. Horowitz, Ron Do, Girish N. Nadkarni Mar 2024

Genome-Wide Polygenic Risk Score For Ckd In Individuals With Apol1 High-Risk Genotypes, Ha My T. Vy, Steven G. Coca, Ashwin Sawant, Ankit Sakhuja, Orlando M. Gutierrez, Richard Cooper, Ruth J.F. Loos, Carol R. Horowitz, Ron Do, Girish N. Nadkarni

Faculty Publications

No abstract provided.

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Coastal Wetland Restoration Through The Lens Of Odum's Theory Of Ecosystem Development, Friedrich W. Keppeler, Annette S. Engel, Linda M. Hooper-Bùi, Paola C. López-Duarte, Charles W. Martin, Jill A. Olin, Katelyn J. Lamb, Michael J. Polito, Nancy N. Rabalais, Brian J. Roberts, Erick M. Swenson, Olaf P. Jensen Mar 2024

Coastal Wetland Restoration Through The Lens Of Odum's Theory Of Ecosystem Development, Friedrich W. Keppeler, Annette S. Engel, Linda M. Hooper-Bùi, Paola C. López-Duarte, Charles W. Martin, Jill A. Olin, Katelyn J. Lamb, Michael J. Polito, Nancy N. Rabalais, Brian J. Roberts, Erick M. Swenson, Olaf P. Jensen

Faculty Publications

Advancing ecological restoration assessments requires a more detailed consideration of species interactions and ecosystem processes. Most restoration projects rely on a few metrics not always directly linked with ecological theory. Here, we used Odum's theory of ecosystem development to assess and compare the ecosystem structure and services of created marshes (4–6 years old) with preexisting, reference marshes in a brackish water region of the Mississippi River Delta. We built ecosystem models for created and reference marshes that integrated large datasets of stomach contents, stable isotopes, and taxa abundances. Despite strong resemblance in community structure, created marshes were at an earlier …

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A Pragmatic Trial Of A Family-Centered Approach To Childhood Obesity Treatment: Rationale And Study Design, Amanda E. Staiano, Alyssa M. Button, Alison Baker, Robbie Beyl, Anne Marie Conn, Angela Lima, Jeanne Lindros, Robert L. Newton, Richard I. Stein, R. Robinson Welch, Stephen Cook, Denise E. Wilfley Mar 2024

A Pragmatic Trial Of A Family-Centered Approach To Childhood Obesity Treatment: Rationale And Study Design, Amanda E. Staiano, Alyssa M. Button, Alison Baker, Robbie Beyl, Anne Marie Conn, Angela Lima, Jeanne Lindros, Robert L. Newton, Richard I. Stein, R. Robinson Welch, Stephen Cook, Denise E. Wilfley

Population and Public Health Science Faculty Publications

Background: Family-based behavioral treatment (FBT) is an effective intensive health behavior and lifestyle treatment for obesity reduction in children and adolescents, but families have limited access. The purpose of this randomized, pragmatic, comparative effectiveness trial was to examine changes in child relative weight in a 12-month, enhanced standard of care (eSOC) intervention combined with FBT (eSOC+FBT) vs. eSOC alone. Methods: Children aged 6 to 15 years with obesity, and their primary caregiver, were recruited from primary care clinics. Families were randomized 1:1 to eSOC, a staged approach led by the primary care provider that gradually intensified dependent on a child's …

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Artifactual Orthologs And The Need For Diligent Data Exploration In Complex Phylogenomic Datasets: A Museomic Case Study From The Andean Flora, Laura A. Frost, Ana M. Bedoya, Laura P. Lagomarsino Mar 2024

Artifactual Orthologs And The Need For Diligent Data Exploration In Complex Phylogenomic Datasets: A Museomic Case Study From The Andean Flora, Laura A. Frost, Ana M. Bedoya, Laura P. Lagomarsino

Faculty Publications

The Andes mountains of western South America are a globally important biodiversity hotspot, yet there is a paucity of resolved phylogenies for plant clades from this region. Filling an important gap in our understanding of the World's richest flora, we present the first phylogeny of Freziera (Pentaphylacaceae), an Andean-centered, cloud forest radiation. Our dataset was obtained via hybrid-enriched target sequence capture of Angiosperms353 universal loci for 50 of the ca. 75 spp., obtained almost entirely from herbarium specimens. We identify high phylogenomic complexity in Freziera, including the presence of data artifacts. Via by-eye observation of gene trees, detailed examination of …

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Effects Of Teosinte Flour (Dioon Mejiae) On Selected Physicochemical Characteristics And Consumer Perceptions Of Gluten-Free Cocoa Cookies Formulated With Mung Bean (Vigna Radiata) Flour, Carlos José Rivera, Ricardo S. Aleman, Jorge Ortega, Andrea Muela, Jhunior Marcia, Joan King, Witoon Prinyawiwatkul Mar 2024

Effects Of Teosinte Flour (Dioon Mejiae) On Selected Physicochemical Characteristics And Consumer Perceptions Of Gluten-Free Cocoa Cookies Formulated With Mung Bean (Vigna Radiata) Flour, Carlos José Rivera, Ricardo S. Aleman, Jorge Ortega, Andrea Muela, Jhunior Marcia, Joan King, Witoon Prinyawiwatkul

Faculty Publications

Dioon mejiae, or teosinte, is a living fossil tree discovered in Olancho, Honduras, whose seeds have a desirable nutritional profile that can provide health benefits. As a result, the objective of this study was to evaluate the effects of teosinte flour obtained from seeds on selected physicochemical characteristics and consumer perceptions of gluten-free cocoa cookies formulated with mung bean (Vigna radiata) flour. Gluten-free cocoa cookies were prepared with different levels of teosinte flour (0%, 70%, 80%, 90%, and 100% by weight of mung bean flour) in substitution of mung bean flour. The cookies were evaluated for texture hardness, color (L*, …

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Maternal Gestational Diabetes And Childhood Adiposity Risk From 6 To 8 Years Of Age, Weiqin Li, Leishen Wang, Huikun Liu, Shuang Zhang, Wei Li, Junhong Leng, Xilin Yang, Zhijie Yu, Amanda E. Staiano, Gang Hu Mar 2024

Maternal Gestational Diabetes And Childhood Adiposity Risk From 6 To 8 Years Of Age, Weiqin Li, Leishen Wang, Huikun Liu, Shuang Zhang, Wei Li, Junhong Leng, Xilin Yang, Zhijie Yu, Amanda E. Staiano, Gang Hu

Population and Public Health Science Faculty Publications

Background/objective: Previous studies found conflicting results on the association between maternal gestational diabetes mellitus (GDM) and childhood overweight/obesity. This study was to assess the association between maternal GDM and offspring’s adiposity risk from 6 to 8 years of age. Methods: The present study longitudinally followed 1156 mother-child pairs (578 GDM and 578 non-GDM) at 5.9 ± 1.2 years postpartum and retained 912 mother-child pairs (486 GDM and 426 non-GDM) at 8.3 ± 1.6 years postpartum. Childhood body mass index (BMI), waist circumference, body fat and skinfold were measured using standardized methods. Results: Compared with the counterparts born to mothers with …

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Interactive Effects Of Gestational Diabetes And High Pre-Pregnancy Body Mass Index On Adverse Growth Patterns Of Offspring, Weihan Cao, Ninghua Li, Rui Zhang, Weiqin Li, Ming Gao, Hui Wang, Leishen Wang, Yijuan Qiao, Jing Li, Zhijie Yu, Gang Hu, Junhong Leng, Xilin Yang Mar 2024

Interactive Effects Of Gestational Diabetes And High Pre-Pregnancy Body Mass Index On Adverse Growth Patterns Of Offspring, Weihan Cao, Ninghua Li, Rui Zhang, Weiqin Li, Ming Gao, Hui Wang, Leishen Wang, Yijuan Qiao, Jing Li, Zhijie Yu, Gang Hu, Junhong Leng, Xilin Yang

Population and Public Health Science Faculty Publications

Aims: To examine the independent and interactive effects of maternal gestational diabetes mellitus (GDM) and high pre-pregnancy body mass index (BMI) on the risk of offspring adverse growth patterns. Materials and Methods: One thousand six hundred and eighty one mother-child pairs were followed for 8 years in Tianjin, China. Group-based trajectory modelling was used to identify offspring growth patterns. Logistic regression was performed to obtain odds ratios (ORs) and 95% confidence intervals (CIs) of GDM and high pre-pregnancy BMI for offspring adverse growth patterns. Restricted cubic spline was used to identify cut-off points. Additive interactions and multiplicative interactions were used …

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Gendered Perceptions And Socio-Economic And Spatial Determinants Of Fear Of Crime: An Empirical Analysis In Szczecin, Poland, Natalia Sypion, Arkadiusz Kołodziej, Michael Leitner, Marek Dutkowski Mar 2024

Gendered Perceptions And Socio-Economic And Spatial Determinants Of Fear Of Crime: An Empirical Analysis In Szczecin, Poland, Natalia Sypion, Arkadiusz Kołodziej, Michael Leitner, Marek Dutkowski

Faculty Publications

The study of the fear of crime phenomenon provides a socially and politically important research question. Many studies show that gender differentiates the fear of crime, which is why we examine this phenomenon in a spatial perspective. The female versus male perspective of feelings of safety in residential areas were significantly different. The research was carried out using the CAWI technique in the city of Szczecin, in Poland (n=346). The research also examined which factors influenced the fear of crime the most: darkness, socio-economic characteristics, type of violations, number of registered crimes, or the assessment of police work. The research …

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Motivators Of Circular Fashion: The Antecedents Of Chinese Consumers’ Fashion Renting Intentions, Chunmin Lang, Ruirui Zhang Mar 2024

Motivators Of Circular Fashion: The Antecedents Of Chinese Consumers’ Fashion Renting Intentions, Chunmin Lang, Ruirui Zhang

Faculty Publications

This study investigates how intrinsic (i.e., shopping values, frugality, and perceived enjoyment) and extrinsic factors (i.e., perceived risks) influence Chinese consumers’ intentions regarding fashion renting. A quantitative study was conducted with data collected from a Chinese online research platform named Wenjuanxing. Data cleaning generated 322 valid samples out of 354 returned responses. Both SPSS 23.0 and Mplus 7 were used for data analysis. The hypotheses were tested through a structural equation model (SEM). The results theoretically confirm and expand the knowledge regarding what conceptual constructs impel or restrain consumers’ renting behaviors. The positive influences of frugality, perceived enjoyment, and attitude …

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Healthful Eating Behaviors Among Couples Contribute To Lower Gestational Weight Gain, Joshua R. Sparks, Leanne M. Redman, Kimberly L. Drews, Clark R. Sims, Rebecca A. Krukowski, Aline Andres Mar 2024

Healthful Eating Behaviors Among Couples Contribute To Lower Gestational Weight Gain, Joshua R. Sparks, Leanne M. Redman, Kimberly L. Drews, Clark R. Sims, Rebecca A. Krukowski, Aline Andres

Clinical Research Faculty Publications

Through longitudinal analysis from the GLOWING cohort study, we examined the independent and joint relationships between couples’ eating behaviors and gestational weight gain (GWG). Pregnant persons (n = 218) and their non-pregnant partners (n = 157) completed an Eating Inventory. GWG was calculated as gestation weight at 36 weeks minus that at 10 weeks. General linear models were used to examine the relationships between GWG and the pregnant persons, non-pregnant partners, and couples (n = 137; mean of pregnant persons and non-pregnant partners) cognitive restraint (range 0–21), dietary disinhibition (range 0–18), and perceived hunger (range 0–14), with higher scores reflecting …

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A Simplified Model For The Study Of Film-Boiling Droplet Motion On Microscale Ratchets, Sheldon Wang, Jeong Tae Ok, Sunggook Park, Mahmoud Elsharafi, Yu Guo Mar 2024

A Simplified Model For The Study Of Film-Boiling Droplet Motion On Microscale Ratchets, Sheldon Wang, Jeong Tae Ok, Sunggook Park, Mahmoud Elsharafi, Yu Guo

Faculty Publications

In this work, we explore a simplified model based on both analytical and computational methods for the study of film-boiling droplet motion on microscale ratchets. We consider a specific ratchet design with the length periods and depth of ratchets much smaller than the size of the droplet. We conclude based on our modeling that for the ratchet configuration considered in this paper, the conduction within the vapor film is the dominant means of heat transfer in comparison with convection and radiation. Furthermore, we demonstrate a more manageable two-dimensional model in which analytical approaches coupled with computational approaches yield reasonably accurate …

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Assessing The Effectiveness Of Regional Storm Surge Reduction Strategies And Tank Level Structural Mitigation Measures For Aboveground Storage Tanks, Santosh Ghimire, Sabarethinam Kameshwar Mar 2024

Assessing The Effectiveness Of Regional Storm Surge Reduction Strategies And Tank Level Structural Mitigation Measures For Aboveground Storage Tanks, Santosh Ghimire, Sabarethinam Kameshwar

Faculty Publications

The effectiveness of regional storm surge reduction strategies and tank-level structural mitigation measures in reducing the failure probability of aboveground storage tanks (ASTs) were studied. Given past failures during flood and hurricane events, several studies have developed fragility models for ASTs. However, the suitability of these fragility models for different hurricane hazard scenarios is unknown. Furthermore, to combat climate change and sea level rise, several regional storm surge reduction strategies are being proposed. However, the effectiveness of these strategies in improving the safety of ASTs is also unknown. So, herein, a framework was proposed that facilitates assessing the suitability of …

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59th Student Senate Week 5 Meeting Minutes, Zoe Joubert Feb 2024

59th Student Senate Week 5 Meeting Minutes, Zoe Joubert

Student Senate Meeting Minutes

No abstract provided.

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Humanitarian Watchdogs: The Impact Of Humanitarian Aid On State Behavior, Kevin David Bradley Feb 2024

Humanitarian Watchdogs: The Impact Of Humanitarian Aid On State Behavior, Kevin David Bradley

LSU Doctoral Dissertations

Does the delivery of humanitarian aid outside the control of the state increase repressive practices by the government and harm the population? Concerns over the unintended negative impacts of humanitarian aid continues to drive research and spirited debate by scholars, policy makers, and practitioners. Although several contend humanitarians serve as “watchdogs” and constrain repression by their presence in a country, whether they do this, the methods employed, and the scope of impact has not been theoretically or empirically addressed. The watchdog theory proposes that the presence of humanitarian international non-governmental organizations (INGOs) generates information about the disaster, the actions of …

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Long-Term Outcomes Of Medical Management Vs Bariatric Surgery In Type 2 Diabetes, Anita P. Courcoulas, Mary Elizabeth Patti, Bo Hu, David E. Arterburn, Donald C. Simonson, William F. Gourash, John M. Jakicic, Ashley H. Vernon, Gerald J. Beck, Philip R. Schauer, Sangeeta R. Kashyap, Ali Aminian, David E. Cummings, John P. Kirwan Feb 2024

Long-Term Outcomes Of Medical Management Vs Bariatric Surgery In Type 2 Diabetes, Anita P. Courcoulas, Mary Elizabeth Patti, Bo Hu, David E. Arterburn, Donald C. Simonson, William F. Gourash, John M. Jakicic, Ashley H. Vernon, Gerald J. Beck, Philip R. Schauer, Sangeeta R. Kashyap, Ali Aminian, David E. Cummings, John P. Kirwan

Division of Basic Science Faculty Publications

Importance: Randomized clinical trials of bariatric surgery have been limited in size, type of surgical procedure, and follow-up duration. Objective: To determine long-Term glycemic control and safety of bariatric surgery compared with medical/lifestyle management of type 2 diabetes. Design, Setting, and Participants: ARMMS-T2D (Alliance of Randomized Trials of Medicine vs Metabolic Surgery in Type 2 Diabetes) is a pooled analysis from 4 US single-center randomized trials conducted between May 2007 and August 2013, with observational follow-up through July 2022. Intervention: Participants were originally randomized to undergo either medical/lifestyle management or 1 of the following 3 bariatric surgical procedures: Roux-en-Y gastric …

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New Features Of Laboratory-Generated Epfrs From 1,2-Dichlorobenzene (Dcb) And 2-Monochlorophenol (Mcp), Lavrent Khachatryan, Marwan Y. Rezk, Divine Nde, Farhana Hasan, Slawomir Lomnicki, Dorin Boldor, Robert Cook, Phillip Sprunger, Randall Hall, Stephania Cormier Feb 2024

New Features Of Laboratory-Generated Epfrs From 1,2-Dichlorobenzene (Dcb) And 2-Monochlorophenol (Mcp), Lavrent Khachatryan, Marwan Y. Rezk, Divine Nde, Farhana Hasan, Slawomir Lomnicki, Dorin Boldor, Robert Cook, Phillip Sprunger, Randall Hall, Stephania Cormier

Faculty Publications

The present research is primarily focused on investigating the characteristics of environmentally persistent free radicals (EPFRs) generated from commonly recognized aromatic precursors, namely, 1,2-dichlorobenzene (DCB) and 2-monochlorophenol (MCP), within controlled laboratory conditions at a temperature of 230 °C, termed as DCB230 and MCP230 EPFRs, respectively. An intriguing observation has emerged during the creation of EPFRs from MCP and DCB utilizing a catalyst 5% CuO/SiO2, which was prepared through various methods. A previously proposed mechanism, advanced by Dellinger and colleagues (a conventional model), postulated a positive correlation between the degree of hydroxylation on the catalyst’s surface (higher hydroxylated, HH and less …

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A Study On High-Frequency Bending Fatigue, Microhardness, Tensile Strength, And Microstructure Of Parts Made Using Atomic Diffusion Additive Manufacturing (Adam) And Additive Friction Stir Deposition (Afsd), Hamed Ghadimi Feb 2024

A Study On High-Frequency Bending Fatigue, Microhardness, Tensile Strength, And Microstructure Of Parts Made Using Atomic Diffusion Additive Manufacturing (Adam) And Additive Friction Stir Deposition (Afsd), Hamed Ghadimi

LSU Doctoral Dissertations

This dissertation reports the findings of several studies on the mechanical and microstructural properties of parts made using atomic diffusion additive manufacturing (ADAM) and additive friction stir deposition (AFSD). The design of a small-sized bending-fatigue test specimen for an ultrasonic fatigue testing system is reported in Chapter 1. The design was optimized based on the finite element analysis and analytical solution. The stress–life (S–N) curve is obtained for Inconel alloy 718. Chapter 2 presents the findings of ultrasonic bending-fatigue and tensile tests carried out on the ADAM test specimens. The S-N curves were created in the very high-cycle fatigue regime. …

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Producing Digital Reflections Of Reality Through Intercultural Filmmaking And Multisensory Engagement, Trai Thomas Feb 2024

Producing Digital Reflections Of Reality Through Intercultural Filmmaking And Multisensory Engagement, Trai Thomas

LSU Doctoral Dissertations

This thesis analyzes the author’s production of three intercultural, multisensory films situated in New Orleans, encompassing elements both narrative and documentary genres. Intercultural cinema exists in a setting where people of different cultural backgrounds live together in power-inflicted spaces of diaspora, colonialism, and cultural apartheid and the development of the story is centered around exoticism, fetishization, and fascination with the other (Marks 2007, 1). Multisensory media primarily engages through visual perception and auditory input, which create cultural knowledge stored as long-term memory files in the brain (Marks 2007).

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Heavy-Element Production In A Compact Object Merger Observed By Jwst, Andrew J. Levan, Benjamin P. Gompertz, Om Sharan Salafia, Mattia Bulla, Eric Burns, Kenta Hotokezaka, Luca Izzo, Gavin P. Lamb, Daniele B. Malesani, Samantha R. Oates, Maria Edvige Ravasio, Alicia Rouco Escorial, Benjamin Schneider, Nikhil Sarin, Steve Schulze, Nial R. Tanvir, Kendall Ackley, Gemma Anderson, Gabriel B. Brammer, Lise Christensen, Vikram S. Dhillon, Phil A. Evans, Michael Fausnaugh, Wen Fai Fong, Andrew S. Fruchter, Chris Fryer, Johan P.U. Fynbo, Nicola Gaspari, Kasper E. Heintz, Jens Hjorth, Jamie A. Kennea, Mark R. Kennedy, Tanmoy Laskar Feb 2024

Heavy-Element Production In A Compact Object Merger Observed By Jwst, Andrew J. Levan, Benjamin P. Gompertz, Om Sharan Salafia, Mattia Bulla, Eric Burns, Kenta Hotokezaka, Luca Izzo, Gavin P. Lamb, Daniele B. Malesani, Samantha R. Oates, Maria Edvige Ravasio, Alicia Rouco Escorial, Benjamin Schneider, Nikhil Sarin, Steve Schulze, Nial R. Tanvir, Kendall Ackley, Gemma Anderson, Gabriel B. Brammer, Lise Christensen, Vikram S. Dhillon, Phil A. Evans, Michael Fausnaugh, Wen Fai Fong, Andrew S. Fruchter, Chris Fryer, Johan P.U. Fynbo, Nicola Gaspari, Kasper E. Heintz, Jens Hjorth, Jamie A. Kennea, Mark R. Kennedy, Tanmoy Laskar

Faculty Publications

The mergers of binary compact objects such as neutron stars and black holes are of central interest to several areas of astrophysics, including as the progenitors of gamma-ray bursts (GRBs)1, sources of high-frequency gravitational waves (GWs)2 and likely production sites for heavy-element nucleosynthesis by means of rapid neutron capture (the r-process)3. Here we present observations of the exceptionally bright GRB 230307A. We show that GRB 230307A belongs to the class of long-duration GRBs associated with compact object mergers4–6 and contains a kilonova similar to AT2017gfo, associated with the GW merger GW170817 (refs. 7–12). …

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59th Student Senate Week 4 Meeting Minutes, Zoe Joubert Feb 2024

59th Student Senate Week 4 Meeting Minutes, Zoe Joubert

Student Senate Meeting Minutes

No abstract provided.

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59th Student Senate Week 1 Meeting Minutes, Zoe Joubert Feb 2024

59th Student Senate Week 1 Meeting Minutes, Zoe Joubert

Student Senate Meeting Minutes

No abstract provided.

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The Impact Of American Kitchen Time-Use On Urban Design And Planning: A Case Study Of Baton Rouge, Louisiana, Farshid Torabian Feb 2024

The Impact Of American Kitchen Time-Use On Urban Design And Planning: A Case Study Of Baton Rouge, Louisiana, Farshid Torabian

LSU Doctoral Dissertations

Over the past century, the global environment has undergone significant changes, characterized by rising temperatures and a sharp increase in greenhouse gas emissions. Parallel to these environmental shifts, the U.S. has witnessed a tripling in energy demands, underscoring the pivotal role of household consumption in the nation's carbon footprint. Within this context, the kitchen, an integral component of the American home, becomes a focal point. Given that Americans predominantly spend their time indoors, it is imperative to understand the dynamics of kitchen usage and its broader implications on energy consumption and environmental impact. To delve into this complex interplay, this …

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Resonance: Collaborative Musicking Through Tactile Ecologies, Ka Hei Cheng, Jesse Allison Feb 2024

Resonance: Collaborative Musicking Through Tactile Ecologies, Ka Hei Cheng, Jesse Allison

Faculty Publications

This paper unveils a PhD research on "Resonance,"an instrument at the crossroads of collaborative music-making, gameplay, and music-related human-computer interaction. Resonance creates a unique communal gameplay performance system, where players are interdependent, transcending the boundaries of human and non-human agency. This collective process has the potential to enhance human connections and bonding, amplifying players' sensitivity to one another and their environment. The heart of this collaboration comprises intricate networks of signals, nurturing relationships, shared expression, decision-making processes, negotiation, and a spectrum of implementations. Resonance's design showcases tactile and tangible interfaces, employing capacitive touch technology as a sound interface, thereby providing …

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59th Student Senate Week 3 Meeting Minutes, Zoe Joubert Feb 2024

59th Student Senate Week 3 Meeting Minutes, Zoe Joubert

Student Senate Meeting Minutes

No abstract provided.

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