Digital Commons Network^™

Multilayered Graphene And Methods Of Making The Same, Manas Ranjan Gartia, Ardalan Chaichi

College of Engineering Patents

The present invention relates in part to a method of fabricating graphene structures from graphene oxide by reducing the graphene oxide on a patterned substrate. The invention also relates in part to graphene structures produced using said method and electrodes and capacitors comprising said graphene structures.

Understanding Meteorological Changes Following Severe Defoliation During A Strong Hurricane Landfall: Insights From Hurricane Michael (2018), Shannon A. Nelson, Paul W. Miller

Faculty Publications

Despite prompting persistent meteorological changes, severe defoliation following a tropical cyclone (TC) landfall has received relatively little attention and is largely overlooked within hurricane preparedness and recovery plan-ning. Changes to near-track vegetation can modify evapotranspiration for months after tropical cyclone passage, thereby altering boundary layer moisture and energy fluxes that drive the local water cycle. This study seeks to understand poten-tial spatial and temporal changes in defoliation-driven meteorological conditions using Hurricane Michael (2018) as a testbed. In this sensitivity study, two Weather Research and Forecasting (WRF) Model simulations, a normal-landscape and a post-TC scenario, are compared to determine how a …

Design And Field-Scale Demonstration Of The Buoyant-Kill Process For Restoring Integrity Of Wells With Sustained Casing Pressure, Efecan Demirci, Andrew Wojtanowicz

Faculty Publications

Sustained Casing Pressure (SCP) is the persistent casinghead pressure resulting from the well’s annular integrity loss and migration of gas above the leaking cement sheath. Downhole—intervention methods for SCP removal employ workover rigs to access and plug off the leaking annulus at depth from within the well. The inexpensive rig-less method of Buoyant Kill involves surface injection of immiscible heavy fluid at the casinghead into the well’s annulus to replace the annular fluid column above the gas-leaking cement and stop gas migration. Laboratory and pilot-size testing have shown feasibility of the method. Presented here, is a field-scale demonstration experiment conducted …

Visual Literacy Unframed: Planning An Oer To Improve College-Level Visual Analysis Skills, Marty Miller

Faculty Publications

No abstract provided.

Factors Influencing Nutritional Intake And Interests In Educational Content Of Athletes And Sport Professionals Toward The Development Of A Clinician-Supported Mobile App To Combat Relative Energy Deficiency In Sport: Formative Research And A Description Of App Functions, Jacob T. Mey, Christine A. Karpinski, Shengping Yang, Joseph D. Madere, Tavis Piattoly, Ronnie Harper, John P. Kirwan

Division of Basic Science Faculty Publications

Background: Relative energy deficiency in sport (RED-S) as a consequence of athlete malnutrition remains a prominent issue. However, it remains underrecognized, in part due to the perceived outward health of athletes. The Eat2Win app was designed to combat RED-S and athlete malnutrition by providing education, behavior modification, and direct communication with expert sports dietitians to athletes and sport professionals (professionals who work with athletes, eg, sport coaches and athletic trainers). Objective: The purpose of this formative research was to gain critical insight on motivators and barriers to optimal nutritional intake from both the athletes’ and sport professionals’ perspectives. Additionally, since …

Comparative Genomics Of The Niche-Specific Plant Pathogen Streptomyces Ipomoeae Reveal Novel Genome Content And Organization, Natasha R. Soares, José C. Huguet-Tapia, Dongli Guan, Christopher A. Clark, Kuei Ting Yang, Olivia R. Kluchka, Raju S. Thombal, Rendy Kartika, Jonathan H. Badger, Gregg S. Pettis

Faculty Publications

The sweet potato soil rot pathogen Streptomyces ipomoeae differs in disease pathology, host range, and virulence factor production from Streptomyces species that cause scab diseases on potato and other plant hosts. Nevertheless, previous phylogenomic analysis suggested S. ipomoeae and the oldest scab species, Streptomyces scabiei, are derived from a common ancestor. While genomes of scab pathogens have been described in some detail, similar knowledge of S. ipomoeae has been lacking. Here, we performed comparative genomic analyses involving both virulent and avirulent strains of S. ipomoeae, along with other plant-pathogenic and saprophytic Streptomyces spp. The txt gene cluster for the phytotoxin …

Effect Of Storage Temperature And Produce Type On The Survival Or Growth Of Listeria Monocytogenes On Peeled Rinds And Fresh-Cut Produce, Juan Moreira, Erika Mera, Vijay Singh Chhetri, Joan M. King, Thanos Gentimis, Achyut Adhikari

Faculty Publications

Whole and fresh-cut produce are minimally processed and susceptible to microbial contamination. This study evaluated the survival or growth of L. monocytogenes on peeled rinds, and fresh-cut produce at different storage temperatures. Fresh-cut fruits and vegetables, including cantaloupe, watermelon, pear, papaya, pineapple, broccoli, cauliflower, lettuce, bell pepper, and kale (25 g pieces) were spot inoculated with 4 log CFU/g of L. monocytogenes and stored at 4 or 13°C for 6 days. Cantaloupe and bell pepper rind disks (20 cm2), mimicking whole produce were inoculated with low inoculum level (4 log CFU/mL) and high inoculum level (6 log CFU/mL) and stored …

Impact Report, 2022-2023, Lsu Libraries

Libraries Impact Reports

No abstract provided.

Targeting The Aspergillus Flavus P2c Gene Through Host-Induced Gene Silencing Reduces A. Flavus Infection And Aflatoxin Contamination In Transgenic Maize, Yenjit Raruang, Olanike Omolehin, Dongfang Hu, Qijian Wei, Surassawadee Promyou, Lidiya J. Parekattil, Kanniah Rajasekaran, Jeffrey W. Cary, Kan Wang, Zhi Yuan Chen

Faculty Publications

Aspergillus flavus is an opportunistic fungal pathogen that infects maize and produces aflatoxins. Using biocontrol or developing resistant cultivars to reduce aflatoxin contamination has only achieved limited success. Here, the A. flavus polygalacturonase gene (p2c) was targeted for suppression through host-induced gene silencing (HIGS) to reduce aflatoxin contamination in maize. An RNAi vector carrying a portion of the p2c gene was constructed and transformed into maize B104. Thirteen out of fifteen independent transformation events were confirmed to contain p2c. The T2 generation kernels containing the p2c transgene had less aflatoxin than those without the transgene in six out of eleven …

Perspectives On The Civil War Era, K. Howell Keiser Jr.

Civil War Book Review

The book reviews and feature essay in this fall 2023 issue of the Civil War Book Review highlight the Civil War Era from the perspectives of various individuals and groups – black sailors and surgeons, women, guerillas, cavalry soldiers, Cherokee warriors, and veterans. The sectional crisis and the war to come shaped the lives of countless individuals, and no one person experienced these years from the same perspective.

Vigilance: The Life Of William Still, Father Of The Underground Railroad, Matthew J. Clavin

Civil War Book Review

Reviewer Matthew J. Clavin writes that abolitionist William Still has been overshadowed by prominent antislavery activists like “Frederick Douglass, William Lloyd Garrison, Harriet Tubman” and others. However, Andrew K Diemer’s Vigilance: The Life of William Still, Father of the Underground Railroad (Alfred A. Knopf) is a “well-written and deeply researched biography” that will ensconce Still’s among the most important abolitionists agitators. The book itself, Clavin writes, will similarly earned “a place on the shelf of new and important works on abolitionists, abolitionism, and the Underground Railroad.”

Se Jeter À L'Eau Avec Les Poissons De La Louisiane, Prosanta Chakrabarty, Sophie Warny, Valérie Stampley

Special Publications of the Museum of Natural Science

No abstract provided.

Twitter As Limited Digital Rhetorical Forum – The Reproductive Rights Discourse Online, Jacob L. Longini

Comparative Woman

Rhetorical discourse has long been characterized by patriarchal systems, and this reality has persisted in online spaces. How might today’s scholar dissect and better understand the nature of online communities, specifically those that engage in women’s rights discourses? I argue that using Thomas Farrell’s notion of “rhetorical forum”, James P. Zappen’s outline for digital rhetorical theory, and Sonja K. Foss and Cindy L. Griffin’s feminist understanding of rhetorical practice, one can account for the current state of such discourses on Twitter. The patriarchal flaws that Foss and Griffin identify in traditional rhetoric can shed light on the negative aspects of …

Magpies, Bridge And Goddess: Unearthing The Hidden Symbols And Rediscovering The Lost Goddess In Chinese Qiqiao Festival, Juan Wu

Comparative Woman

The Qiqiao Festival, also known as the Qixi Festival, or Chinese valentine’s day, is a festival celebrating the annual meeting of the Cowherd and Weaver Maid in mythology. The most influential version focuses on the romance or love theme; however, it ignores its underlying historical context, gender tension and mythical belief. This paper takes the texts, rituals and materials related to the Qiqiao festival to investigate its origin and evolution. First, it takes the anthological case of the Qiqiao festival in Xihe county to explore its core image of the holy bridge and Goddess Qiao. Second, it traces the bridge …

Louisiana Agriculture Magazine, Winter 2023

Louisiana Agriculture

Agricultural best management practices are measures that producers can take to reduce — or eliminate — farming byproducts that enter streams and groundwater. Many of these practices address fertilizer and irrigation management and the handling of pesticides and animal waste. LSU AgCenter research has helped establish these practices, and extension agents assist producers in implementing them.

This issue of Louisiana Agriculture highlights the best management practices for many of the state’s most production areas. Aquaculture specialists detail how crawfish farms can save money while meeting best management practices, and sugarcane experts tell how the AgCenter is developing new varieties to …

Bamboo Nanocellulose/Montmorillonite Nanosheets/Polyethyleneimine Gel Adsorbent For Methylene Blue And Cu(Ii) Removal From Aqueous Solutions, Xuelun Zhang, Feng Li, Xiyu Zhao, Jiwen Cao, Shuai Liu, You Zhang, Zihui Yuan, Xiaobo Huang, Cornelis F. De Hoop, Xiaopeng Peng, Xingyan Huang

Faculty Publications

In recent years, the scarcity of pure water resources has received a lot of attention from society because of the increasing amount of pollution from industrial waste. It is very important to use low-cost adsorbents with high-adsorption performance to reduce water pollution. In this work, a gel adsorbent with a high-adsorption performance on methylene blue (MB) and Cu(II) was prepared from bamboo nanocellulose (BCNF) (derived from waste bamboo paper) and montmorillonite nanosheet (MMTNS) cross-linked by polyethyleneimine (PEI). The resulting gel adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (SEM), X-ray photoelectron spectroscopic (XPS), etc. …

Remote Assessment Of Negative Symptoms Of Schizophrenia, David G. Daniel, Alex S. Cohen, Dawn Velligan, Phillip D. Harvey, Larry Alphs, Michael Davidson, William Potter, Alan Kott, Nina Schooler, Christopher R. Brodie, Raeanne C. Moore, Pierre Lindenmeyer, Stephen R. Marder

Faculty Publications

In contrast to the validated scales for face-to-face assessment of negative symptoms, no widely accepted tools currently exist for remote monitoring of negative symptoms. Remote assessment of negative symptoms can be broadly divided into 3 categories: (1) remote administration of an existing negative-symptom scale by a clinician, in real time, using videoconference technology to communicate with the patient; (2) direct inference of negative symptoms through detection and analysis of the patient's voice, appearance, or activity by way of the patient's smartphone or other device; and (3) ecological momentary assessment, in which the patient self-reports their condition upon receipt of periodic …

Betacoronaviruses Sars-Cov-2 And Hcov-Oc43 Infections In Igrov-1 Cell Line Require Aryl Hydrocarbon Receptor, Meisam Yousefi, Wai Suet Lee, Wharton O.Y. Chan, Wei He, Marcus G. Mah, Cythia Lingli Yong, Joshua M. Deerain, Lijin Wang, Camille Arcinas, Biaoguo Yan, Dewei Tan, Wan Rong Sia, Akshamal M. Gamage, Jinxuan Yang, Alan Chen Yu Hsu, Shang Li, Martin Linster, Xinglou Yang, Sujoy Ghosh, Danielle E. Anderson, Gavin J.D. Smith, Chee Wah Tan, Lin Fa Wang, Yaw Shin Ooi

Division of Basic Science Faculty Publications

The emergence of novel betacoronaviruses has posed significant financial and human health burdens, necessitating the development of appropriate tools to combat future outbreaks. In this study, we have characterized a human cell line, IGROV-1, as a robust tool to detect, propagate, and titrate betacoronaviruses SARS-CoV-2 and HCoV-OC43. IGROV-1 cells can be used for serological assays, antiviral drug testing, and isolating SARS-CoV-2 variants from patient samples. Using time-course transcriptomics, we confirmed that IGROV-1 cells exhibit a robust innate immune response upon SARS-CoV-2 infection, recapitulating the response previously observed in primary human nasal epithelial cells. We performed genome-wide CRISPR knockout genetic screens …

Effects Of Episodic Food Insecurity On Psychological And Physiological Responses In African American Women With Obesity (Responses): Protocol For A Longitudinal Observational Cohort Study, Candice A. Myers, Robbie A. Beyl, Daniel S. Hsia, Melissa N. Harris, Isabella J. Reed, Danielle D. Eliser, Lauren Bagneris, John W. Apolzan

Clinical Research Faculty Publications

Background: Food insecurity is a risk factor for multiple chronic diseases, including obesity. Importantly, both food insecurity and obesity are more prevalent in African American women than in other groups. Furthermore, food insecurity is considered a cyclic phenomenon, with episodes of food adequacy (ie, enough food to eat) and food shortage (ie, not enough food to eat). More research is needed to better understand why food insecurity is linked to obesity, including acknowledging the episodic nature of food insecurity as a stressor and identifying underlying mechanisms. Objective: The objective of this study is to investigate the episodic nature of food …

Dietary Sugars And Ncds: Burden, Epidemiology, And Priority Interventions, Pascal Bovet, Nick Banatvala, Eric Ravussin, Leo Nederveen

Clinical Research Faculty Publications

A high dietary intake of free sugars, and particularly sugar-sweetened beverages, is an important cause of cardiovascular disease, obesity, diabetes and tooth decay. The WHO recommends that free sugars contribute < 10% of the total energy intake (< 30-40 g or < 120-160 calories per day for an adult, approximately) throughout the life course, and ideally < 5%. This chapter describes the definitions of sugars and sugar drinks, the sources of sugar in the diet, the physiologic characteristics of sugar in relation to health outcomes, as well as natural or artificial no-calorie sweeteners. Public health interventions to reduce dietary sugar intake in the whole population are presented, including education programmes, public procurement policies, front-of-pack labelling, measures to reduce the marketing of sugary drinks and foods, reformulation of sugar products to reduce their sugar content, the importance of a high excise tax on sugar-sweetened beverages and monitoring.

Mmst-Vit: Climate Change-Aware Crop Yield Prediction Via Multi-Modal Spatial-Temporal Vision Transformer, Fudong Lin, Summer Crawford, Kaleb Guillot, Yihe Zhang, Yan Chen, Xu Yuan, Li Chen, Shelby Williams, Robert Minvielle, Xiangming Xiao, Drew Gholson, Nicolas Ashwell, Tri Setiyono, Brenda Tubana, Lu Peng, Magdy Bayoumi, Nian Feng Tzeng

Faculty Publications

Precise crop yield prediction provides valuable information for agricultural planning and decision-making processes. However, timely predicting crop yields remains challenging as crop growth is sensitive to growing season weather variation and climate change. In this work, we develop a deep learning-based solution, namely Multi-Modal Spatial-Temporal Vision Transformer (MMST-ViT), for predicting crop yields at the county level across the United States, by considering the effects of short-term meteorological variations during the growing season and the long-term climate change on crops. Specifically, our MMST-ViT consists of a Multi-Modal Transformer, a Spatial Transformer, and a Temporal Transformer. The Multi-Modal Transformer leverages both visual …

Association Between Sleep, Sedentary Time, Physical Activity, And Adiposity In Adolescents: A Prospective Observational Study, Chelsea L. Kracht, Peter T. Katzmarzyk, Catherine M. Champagne, Stephanie T. Broyles, Daniel S. Hsia, Robert L. Newton, Amanda E. Staiano

Population and Public Health Science Faculty Publications

Purpose This study aimed to examine the effects of substituting sedentary time with sleep or physical activity on adiposity in a longitudinal sample of adolescents. Methods Adolescents (10-16 yr) were recruited for a prospective observational cohort. Parents and adolescents reported demographic characteristics and pubertal development. Accelerometry was used to measure sleep, physical activity, and sedentary time. Adiposity was quantified with imaging techniques. Isotemporal substitution modeling was conducted to examine the effect of substituting 10 min of sedentary time with sleep or differing intensities of physical activity. Results were stratified by sex and race and adjusted for covariates. Results A total …

Identification Of Oral Therapeutics Using An Ai Platform Against The Virus Responsible For Covid-19, Sars-Cov-2, Adam Bess, Frej Berglind, Supratik Mukhopadhyay, Michal Brylinski, Chris Alvin, Fanan Fattah, Kishor M. Wasan

Faculty Publications

Purpose: This study introduces a sophisticated computational pipeline, eVir, designed for the discovery of antiviral drugs based on their interactions within the human protein network. There is a pressing need for cost-effective therapeutics for infectious diseases (e.g., COVID-19), particularly in resource-limited countries. Therefore, our team devised an Artificial Intelligence (AI) system to explore repurposing opportunities for currently used oral therapies. The eVir system operates by identifying pharmaceutical compounds that mirror the effects of antiviral peptides (AVPs)—fragments of human proteins known to interfere with fundamental phases of the viral life cycle: entry, fusion, and replication. eVir extrapolates the probable antiviral efficacy …

Understanding Barriers And Facilitators To Physical Activity Engagement To Inform A Precision Prescription Approach During Pregnancy, Joshua R. Sparks, Emily W. Flanagan, Maryam Kebbe, Leanne M. Redman

Clinical Research Faculty Publications

Physical activity during pregnancy is an important health behavior. However, many pregnant individuals are provided with little-to-no guidance to adequately engage in physical activity. The purpose of this quantitative and quasi-qualitative study of currently or previously pregnant women was to examine physical activity behaviors in pregnancy and understand barriers and facilitators to achieving physical activity recommendations. Overall, 431 women (18+ years), White/Caucasian (84.5%), married (84.9%), and currently pregnant (66.6%), completed an online survey study. Most women (69.4%) reported engaging in cardio-based physical activity and willing to engage in physical activity to meet guidelines between 2 and 5 days per week …

Midlife Neuropsychological Profiles And Associated Vascular Risk: The Bogalusa Heart Study, Ileana De Anda-Duran, Vijaya B. Kolachalama, Owen T. Carmichael, Phillip H. Hwang, Camilo Fernandez, Rhoda Au, Lydia A. Bazzano, David J. Libon

Clinical Research Faculty Publications

Background: Individuals with Alzheimer's disease (AD) often present with coexisting vascular pathology that is expressed to different degrees and can lead to clinical heterogeneity. Objective: To examine the utility of unsupervised statistical clustering approaches in identifying neuropsychological (NP) test performance subtypes that closely correlate with carotid intima-media thickness (cIMT) in midlife. Methods: A hierarchical agglomerative and k-means clustering analysis based on NP scores (standardized for age, sex, and race) was conducted among 1,203 participants (age 48±5.3 years) from the Bogalusa Heart Study. Regression models assessed the association between cIMT ≥50th percentile and NP profiles, and global cognitive score (GCS) tertiles …

Wooing “Willing Dupes”: The Bush Administration’S Use Of Emotional Language In The Drive Toward War With Iraq, Michael F. Russo

Faculty Publications

The publicly available texts of the George W. Bush administration from September 11, 2001, to March 19, 2003, as presented in The Public Papers of the Presidents of the United States, were analyzed for word frequency and the words themselves analyzed for emotional weight using the NRC Emotion Intensity Lexicon. Transcripts of six television news agencies (ABC, CBS, NBC, CNN, FOX, and PBS) were also analyzed for word frequency to determine the extent to which these agencies may have repeated and consequently amplified the rhetoric of the administration. Public opinion polling for this same period was examined in an …

The Real Cost To Remain Competitive: Byu Confronts Racist Past, Darron Smith, Lori Latrice Martin

Faculty Publications

College sports is a multi-billion-dollar business, and universities are looking for ways to remain competitive, including recruiting and retaining athletes from historically underrepresented groups to predominantly white institutions (PWI), many of which have a documented history of excluding non-white students, including blacks, indigenous peoples, and other people of color (often referred to as BIPOC). This article will examine the legacy of the racist teachings, past controversies, and compromises of the Church of Jesus Christ of Latter-day Saints (LDS, Mormons) along with persistent struggles to shake off its 130-year-old racist past in efforts for its flagship school, Brigham Young University, to …

Charting The Course To Advance Dei In The Ocean Sciences A Case Study, Christopher F. D’Elia, Katherine Falls, Sibel Bargu, Linda Hooper-Bùi

Faculty Publications

The Louisiana State University College of the Coast & Environment (LSU CC&E) developed a multi-faceted strategic initiative to increase its diversity, equity, and inclusion. Elements of this initiative began one-by-one over the last decade and were aggregated into a comprehensive implementation plan—the 2020 CC&E Diversity, Equity, and Inclusion Action Plan. Based on best practices in the “physical sciences” (i.e., geosciences, including oceanography), the plan aims to augment recruitment and retention using limited resources and personnel. The long-range goal is to increase the number of PhD graduates from underrepresented groups by employing strategies that start at the 6–12th grade level. The …

Simulating Grain Shape Effects And Damage In Granular Media Using Peridem, Debdeep Bhattacharya, Robert P. Lipton

Faculty Publications

We provide a numerical platform for the analysis of particle shape and topology effect on the macroscopic behavior of granular media. We work within a discrete element method (DEM) framework and apply a peridynamic model for deformable particles accounting for deformation and damage of individual particles. To accommodate arbitrary particle shapes including nonconvex ones as well as particle topology, an efficient method is developed to keep intraparticle peridynamic interaction within particle boundaries. Particle contact with the rigid boundary wall is computed analytically to improve accuracy. To speed up simulations with particles of different shapes and sizes the initial configuration is …

Seepage-Induced Pore Pressure Variations Beneath An Earthen Levee Measured With A Novel Seismic Tool, Daniel Locci-Lopez, Juan M. Lorenzo

Faculty Publications

Shear-wave seismic reflection velocity-versus-depth models can complement our understanding of seepage pore pressure variations beneath earthen levees at locations between geotechnical sites. The seasonal variations of water level in the Mississippi River create pore pressure changes in the adjacent hydraulically connected aquifer on the protected side of artificial levees. Time-lapse shear-wave velocity analysis or repetition of seismic acquisition over an area is a non-invasive method that can detect seasonal pore pressure variations in shallow (< 40 m) aquifers. The seismic reflection patterns during the seasonal pore pressure variations of the river show a distinctive change in the velocity semblance analysis, which is translated as a change in the average stress carried by the grain-to-grain contact, or simply the effective pressure. The seismic data show a greater variation of up to +140/−40 m/s or +700/−150 kPa in the confined aquifer zone, compared with the leaky confined aquifer zone of up to +46/−48 m/s or +140/−80 kPa. These relative effective pressure characteristics allow us to distinguish between confined and leaky aquifers and can be an optional approach for pressure prediction in floodplains along levees without the need to drill borings in the area to measure piezometric data.