Digital Commons Network^™

Methods To Manage Survey Error Within Economic Contribution Analysis, Madison Jane Plaisance

LSU Master's Theses

The primary objective of this research was to employ strategical methodological approaches to assess the economic value of specific sub-sectors of the green industry within Louisiana. I specifically focused on addressing errors associated with utilizing survey data as the primary data source in such analyses and utilizing approaches such as post-survey stratification and bootstrapping techniques to mitigate these errors.

To achieve this aim, a group of green industry professionals and I selected sectors for analysis based on horticultural licenses issued by the Louisiana Department of Agriculture and Forestry (LDAF). Through collaboration with advisors from the Louisiana Nursery and Landscape Association …

Veneers And Vignettes: Staging The Mountain West, Matthew Jones

LSU Master's Theses

Veneer (noun): An attractive appearance that covers or disguises someone or something's true nature or feelings.

Vignette (noun): A small illustration or portrait photograph which fades into its background without a definite border.

This exhibition, Veneers and Vignettes: Staging the Mountain West embodies my pursuits to contextualize my place in the Mountain West, my home. These works seek to understand how the extents of time, circumstance, and people have shaped the contemporary cultures, environment, and implied trajectory of the decades ahead. What legacies have we imprinted upon this place and with what repercussions? I feel uneasy for my home in …

An Analysis Of William Bolcom's "Three Classical Rags", Thomas A. Owens

LSU Doctoral Dissertations

This document aims to provide insight into William Bolcom’s Three Classical Rags through harmonic and formal analysis of each rag, investigating the ways in which they fulfill or subvert the expectations of ragtime. The study begins with a description of the harmonic language, form, and metric structure typical of ragtime composers like Scott Joplin and Joseph Lamb. Examples of rags that maintain these characteristics are The Entertainer by Joplin, Heliotrope Bouquet by Louis Chauvin and Joplin, and Top Liner Rag by Lamb. Analysis of Bolcom’s Three Classical Rags ensues, exploring the ways they both honor and subvert the expectations …

Preserving The Historic And Cultural Music Of Louisiana Through School Music: An Ethnographic Case Study, Christopher S. Song

LSU Doctoral Dissertations

The purpose of this ethnographic case study was to examine the lives of teachers, students, community members, and culture bearers within a musical community located in South Central Louisiana. The geographic area of focus in this research was Vermilion Parish and its surrounding area, known as Acadiana, the heart of Creole and Cajun culture where Traditional Louisiana Music finds its origins. Participants’ intrinsic cultural understandings of Louisiana’s music and impact on school music programs was examined through ethnographic interview and observation. A resource pedagogy known as funds of knowledge was used as a theoretical framework meant to maintain participants’ intrinsic …

Hydrodynamic And Biochemical Impacts On The Development Of Hypoxia In The Louisiana-Texas Shelf - Part 1: Roles Of Nutrient Limitation And Plankton Community, Yanda Ou, Z. George Xue

Faculty Publications

A three-dimensional coupled hydrodynamic-biogeochemical model with multiple nutrient and plankton functional groups was developed and adapted to the Gulf of Mexico to investigate the role of nutrients and the complexity of plankton community in dissolved oxygen (DO) dynamics. A 15-year hindcast was achieved covering the period of 2006-2020. Extensive model validation against in situ data demonstrates that the model was capable of reproducing vertical distributions of DO and spatial distributions of bottom DO concentration, as well as their interannual variations. The study demonstrates that bottom DO dynamics and hypoxia evolution are significantly influenced by both physical processes and local biochemistry, …

Trophic Interactions In Microbiomes Influence Plant Host Population Size And Ecosystem Function, Jiaqi Tan, Na Wei, Martin M. Turcotte

Faculty Publications

Plant microbiomes that comprise diverse microorganisms, including prokaryotes, eukaryotes and viruses, are the key determinants of plant population dynamics and ecosystem function. Despite their importance, little is known about how species interactions (especially trophic interactions) between microbes from different domains modify the importance of microbiomes for plant hosts and ecosystems. Using the common duckweed Lemna minor, we experimentally examined the effects of predation (by bacterivorous protists) and parasitism (by bacteriophages) within microbiomes on plant population size and ecosystem phosphorus removal. Our results revealed that the addition of predators increased plant population size and phosphorus removal, whereas the addition of parasites …

Scaling The Wall: Math Attitudes And Mindsets Of Middle School High-Achievers, Stephanie R. Gullage

LSU Doctoral Dissertations

This intrinsic case study examined groups of gifted and high achieving middle school mathematics students in one school’s advanced and honors program. The purpose of this study was to determine how the students view themselves in light of noncognitive constructs, how they regard and apply those constructs in their mathematics studies, how the work of those constructs can affect their attitudes toward mathematics, and how they believe educators can help foster success in math via noncognitive factors. The researcher employed a questionnaire, observations, focus group interviews, and interviews with key informants to gather study data. With the theoretical lenses of …

Optimal Planning And Design Of Operations And Maintenance Systems For Offshore Wind Farms, Md Imran Hasan Tusar

LSU Doctoral Dissertations

Feasible and sustainable sources of power are a critical issue nowadays. Offshore wind farms (OWF) can be a solution to power generation problems, but it is relatively more expensive— their installation cost is more than twice of their comparable size onshore counterparts. The cost that matters most is the operations and maintenance (O&M) cost. Expensive and sophisticated transfer vehicles and highly skilled technicians are needed to conduct O&M activities, resulting in a remarkably higher O&M cost for an offshore wind farm project. Offshore wind turbines can capture more wind than onshore turbines because of their larger structure and location in …

Sexual Abuse: A Multi-Faceted Problem, Marcus Venable

LSU Doctoral Dissertations

On average, US citizens have experienced approximately 400,000 sexual assaults per year, which results in enormous immediate and long-term consequences for individuals, as well as society in general.

In the U.S., the principal method of combatting this crime has been the creation of Sex Offender Registries used to notify the public of the identity and location of convicted sex offenders who may be living in proximity to their residence. In addition to the Registry, laws have been passed forbidding convicted sex offenders from residing within buffer zones around areas of high child concentration [schools/parks/etc.].

The efficacy and consequences of these …

Extreme Climate Events And Agricultural Commodity Markets, Mohammad Abir Chowdhury Shovon

LSU Master's Theses

This article investigates the impact of extreme climate events on U.S. agricultural commodity markets, specifically focusing on corn and soybeans. Using event study methods and a comprehensive dataset of 254 extreme climate events for corn as well as 250 extreme climate events for soybeans in top ten corn & soybeans producing states of the USA between 1995 and 2023, we examine how storms, floods, extreme temperatures, and droughts affect the abnormal returns of these commodities. Our findings indicate that 22.04% of climate events significantly impact corn returns and 21.20% of climate events have significant impact on soybeans returns. Notably, extreme …

Pregnant Black Bodies In Peril: A Multi-Method Analysis Of Obstetric Outcomes And Gestational Experiences, Courtney E. Williams

LSU Doctoral Dissertations

My multi-method three-paper dissertation provides a better understanding of the relationship between maternal racial identity, obstetric outcomes, and gestational experiences. Using birth certificate data from the 2016 U.S. National Vital Statistics System and binary logistic regression models, in the first paper I explore heterogeneity in severe maternal morbidity (SMM) by maternal race, maternal education, and maternal age. To complement the first paper, in the second paper I allow 35 Black and White women/birthing people to describe pregnancy, birth, and early motherhood in their own words. I situate the Covid-19 pandemic as a unique cultural backdrop in this qualitative paper to …

Characteristics Influencing Enrollment Choices: A Mixed Methods Analysis Of Factors That Influence Black Students' Decision To Enroll In College Of Agriculture Programs, Jennifer L. Brown

LSU Doctoral Dissertations

This study aims to identify the barriers that affect Minority enrollment in agriculture, particularly focusing on increasing the enrollment of Black students. There is a significant concern regarding the gap between Black individuals and agriculture enrollment in post-secondary agriculture programs at land-grant institutions. The purpose of this mixed method phenomenology was to (1) identify factors that influence the decision of Black students to enroll in the College of Agriculture and (2) uncover the societal and economic influences that continue to serve as barriers to Black students’ enrolling in agriculture. The quantitative portion of the investigation utilized a web-based instrument structured …

Identifying Self-Efficacy Factors Of Agriscience Teachers When Working With Supervised Agricultural Experiences For Students With Disabilities, Saralyn L. Smith

LSU Master's Theses

The number of students receiving disability services annually in the U.S. has increased in the last decade. Even with this growing population of students with disabilities, research continues to show a lack of confidence of School Based Agricultural Education (SBAE) teachers in their ability and skills to include these students. The purpose of this qualitative study was to describe the factors that influence how SBAE teachers support students with disabilities in Supervised Agricultural Experience Programs and identify perceived obstacles SBAE teachers have regarding working with students with disabilities. Semi-structed interviews were conducted with twelve SBAE teachers to understand their lived …

Controlling Phase Transitions In Mnnige Using Thermal Quenching And Hydrostatic Pressure, Jing Han Chen, Tej Poudel Chhetri, Anthony T. Grant, Xiaojian Bai, Qiang Zhang, Chung Kai Chang, David P. Young, Igor Dubenko, Saikat Talapatra, Naushad Ali, Shane Stadler

Faculty Publications

The phase transitions in MnNiGe compounds were explored by manipulating the heat treatment conditions and through hydrostatic pressure application. As the quenching temperature increased, both the first-order martensitic structural transition temperatures and magnetic transition temperatures decreased relative to those in the slowly-cooled samples. When the samples were quenched from 1200 °C, the first-order martensitic structural transition temperature lowered by more than 200 K. The structural transitions also shifted to lower temperature with the application of hydrostatic pressure during measurement. Temperature-dependent x-ray diffraction results reveal that the changes of the cell parameters resulting from the structural transitions are nearly identical for …

Learning Proximal Operators With Gaussian Process And Adaptive Quantization In Distributed Optimization, Aldo Duarte Vera Tudela

LSU Doctoral Dissertations

In networks consisting of agents communicating with a central coordinator and working together to solve a global optimization problem in a distributed manner, the agents are often required to solve private proximal minimization subproblems. Such a setting often requires a further decomposition method to solve the global distributed problem, resulting in extensive communication overhead. In networks where communication is expensive, it is crucial to reduce the communication overhead of the distributed optimization scheme. Integrating Gaussian processes (GP) as a learning component to the Alternating Direction Method of Multipliers (ADMM) has proven effective in learning each agent's local proximal operator to …

Struggling To Be Positive Problem Solvers – A Study On The Relationship Of Elementary Mathematical Self-Concept, Gender, Learner Identification, And Productive Struggle Trajectories On Constructed Response Questions When Being Taught With A Standardized Curriculum, Kali D. Rogers

LSU Doctoral Dissertations

Mathematical word problems are some of the most difficult problems for students to solve due to their complexity and relationship to real-world situations (Şahin et al., 2014; Verschaffel et al., 2020). With math being known for right-or-wrong answers, these open-ended questions cause much confusion and frustration, specifically for students of various subgroups. In the last several decades, educational teaching expectations have shifted from engaging, self-created learning to robotic and redundant curriculum expectations that induce a ‘teaching to the test’ environment (Shafiyeva, 2021). Mathematics is the powerhouse of where students can experience and succeed with productive struggle learning that teaches the …

It’S Britney, Bitch, Mary Hyepock

LSU Doctoral Dissertations

This dissertation engages public rhetorics surrounding pop princess Britney Spears as a case study for examining the rhetoricity of bodily autonomy. Bodily autonomy is commonly understood as the legal right to control what happens to one’s body without external influence or coercion. However, one’s legal access to bodily autonomy is produced, negotiated, and maintained through discourse. In other words, one’s access to so-called “ownership” over their body and agency to make decisions about it is deeply tied to the gendered and racialized symbolic production of citizenship in the United States. Utilizing a reproductive justice framework, I investigate how Britney Spears’ …

An Analysis Of The Musical Gestures In Osvaldo Golijov’S The Dreams And Prayers Of Isaac The Blind And Their Relationship To The Kabbalah Sefirot, Jeremy Gdaniec

LSU Doctoral Dissertations

Osvlado Golijov’s The Dreams and Prayers of Isaac the Blind, scored for klezmer clarinet and string quartet, remains one of his most influential works since its premier in 1994. Inspiration for the work came from the writings of Rabbi Isaac the Blind, a prominent 13^th century figurehead in the branch of Jewish mysticism known as Kabbalah. In Kabbalah, symbols known as the sefirot are emanations of creation and the key to unlocking the divine secrets of the God-head. The analysis presented in this document combines musical gesture theory with Kabbalistic concepts for new perspectives on Golijov’s …

Examining The Authenticity Of The 'Ether Model' In Certain O-Glycosylation Reactions, Varad Vinayak Agarkar

LSU Doctoral Dissertations

Acinetobacter baumannii is a gram-negative bacterium species that is responsible for nosocomial infections. It has shown antibiotic resistance and has been designated an urgent threat by the CDC. In Chapter 1, I highlight my efforts in the synthesis of a Kdo building block in the journey towards the construction of an A. baumannii lipooligosaccharide (LOS) core pentasaccharide- a potential candidate for glycoconjugate vaccine against A. baumannii infection. I talk about various optimizations and improvements in the Kdo monosaccharide synthesis and the mechanistic insights I provided about a critical transformation in the synthetic sequence.

Chemical O-glycosylation is a significant research …

Exploratory Physiological Experiments Are Not Clinical Trials, Erik A. Richter, David E. James, John P. Kirwan, Juleen R. Zierath

Division of Basic Science Faculty Publications

No abstract provided.

Temporal Dynamics Of The Multi-Omic Response To Endurance Exercise Training, David Amar, Nicole R. Gay, Pierre M. Jean-Beltran, Dam Bae, Surendra Dasari, Courtney Dennis, Charles R. Evans, David A. Gaul, Olga Ilkayeva, Anna A. Ivanova, Maureen T. Kachman, Hasmik Keshishian, Ian R. Lanza, Ana C. Lira, Michael J. Muehlbauer, Venugopalan D. Nair, Paul D. Piehowski, Jessica L. Rooney, Kevin S. Smith, Cynthia L. Stowe, Bingqing Zhao, Natalie M. Clark, David Jimenez-Morales, Malene E. Lindholm, Gina M. Many, James A. Sanford, Gregory R. Smith, Nikolai G. Vetr, Tiantian Zhang, Jose J. Almagro Armenteros, Julian Avila-Pacheco, Nasim Bararpour, Yongchao Ge, Zhenxin Hou

Clinical Research Faculty Publications

Regular exercise promotes whole-body health and prevents disease, but the underlying molecular mechanisms are incompletely understood1–3. Here, the Molecular Transducers of Physical Activity Consortium4 profiled the temporal transcriptome, proteome, metabolome, lipidome, phosphoproteome, acetylproteome, ubiquitylproteome, epigenome and immunome in whole blood, plasma and 18 solid tissues in male and female Rattus norvegicus over eight weeks of endurance exercise training. The resulting data compendium encompasses 9,466 assays across 19 tissues, 25 molecular platforms and 4 training time points. Thousands of shared and tissue-specific molecular alterations were identified, with sex differences found in multiple tissues. Temporal multi-omic and multi-tissue analyses revealed expansive biological …

Restricting Bioenergetic Efficiency Enhances Longevity And Mitochondrial Redox Capacity In Drosophila Melanogaster, Analisa L. Taylor, Olga Dubuisson, Pritika Pandey, Elizabeth R.M. Zunica, Bolormaa Vandanmagsar, Wagner S. Dantas, Alyssa Johnson, Christopher L. Axelrod, John P. Kirwan

Division of Basic Science Faculty Publications

Mitochondria are essential for survival and as such, impairments in organelle homeostasis significantly accelerate age-related morbidity and mortality. Here, we determined the contribution of bioenergetic efficiency to life span and health span in Drosophila melanogaster utilizing the mitochondrial uncoupler BAM15. Life span was determined in flies fed a normal diet (ND) or high fat diet (HFD) supplemented with vehicle or BAM15. Locomotor function was determined by negative geotaxis assay in middle-aged flies fed vehicle or BAM15 under ND or HFD conditions. Redox capacity (high-resolution respirometry/fluorometry), citrate synthase (enzyme activity), mtDNA content (qPCR), gene expression (qPCR), and protein expression (western blot) …

Detection Of Ochyromera Ligustri (Coleoptera: Curculionidae: Curculioninae) In Ligustrum Spp. (Oleaceae) Using Newly Developed Pcr Primers, Ilgoo Kang, Amy Roda, Brandi Misiaszek, Tanner Sparks, Rodrigo Diaz

Faculty Publications

Ligustrum spp. (Oleaceae) have become invasive species in the US and negatively affect native plant diversity and richness in forests. Ochyromera ligustri (Coleoptera: Curculionidae) is considered a potential biological control agent in the US because adults feed on the foliage and larvae are seed-feeders of Ligustrum spp. To discover the relationships between O. ligustri and Ligustrum spp., fruit dissections or rearing and field observations are required. In the current research project, novel PCR primers were developed to rapidly detect the DNA of O. ligustri in molecular analyses without rearing and observation. The developed PCR primers worked even with 0.01 ng …

Relative Impacts Of Varroa Destructor (Mesostigmata:Varroidae) Infestation And Pesticide Exposure On Honey Bee Colony Health And Survival In A High-Intensity Corn And Soybean Producing Region In Northern Iowa, Frank D. Rinkevich, Robert G. Danka, Thomas E. Rinderer, Joseph W. Margotta, Lewis J. Bartlett, Kristen B. Healy

Faculty Publications

The negative effects of Varroa and pesticides on colony health and survival are among the most important concerns to beekeepers. To compare the relative contribution of Varroa, pesticides, and interactions between them on honey bee colony performance and survival, a 2-year longitudinal study was performed in corn and soybean growing areas of Iowa. Varroa infestation and pesticide content in stored pollen were measured from 3 apiaries across a gradient of corn and soybean production areas and compared to measurements of colony health and survival. Colonies were not treated for Varroa the first year, but were treated the second year, leading …

Breaking The Spatial Justice Emergency Cycle: The Role Of Foresight Planning, Fabio Capra-Ribeiro

Faculty Publications

This paper examines the critical need to integrate prospective planning into territorial development processes for achieving spatial justice and sustainable urban futures. It highlights the limitations of a reactive approach to urban governance, particularly prevalent in Latin America, where weak institutions and unstable political systems often hinder long-term perspectives. The research emphasizes the importance of strategic foresight as a complementary tool to traditional planning practices. Territorial foresight facilitates the exploration of complex future scenarios, fostering collaborative learning and a shared vision among stakeholders. The study proposes a shift towards a proactive, foresight-driven approach that can help break the vicious cycle …

Mapping And Omics Integration: Towards Precise Rice Disease Resistance Breeding, John Christian Ontoy, Jong Hyun Ham

Faculty Publications

Rice (Oryza sativa), as a staple crop feeding a significant portion of the global population, particularly in Asian countries, faces constant threats from various diseases jeopardizing global food security. A precise understanding of disease resistance mechanisms is crucial for developing resilient rice varieties. Traditional genetic mapping methods, such as QTL mapping, provide valuable insights into the genetic basis of diseases. However, the complex nature of rice diseases demands a holistic approach to gain an accurate knowledge of it. Omics technologies, including genomics, transcriptomics, proteomics, and metabolomics, enable a comprehensive analysis of biological molecules, uncovering intricate molecular interactions within the rice …

Speech, Voice, And Language Outcomes Following Deep Brain Stimulation: A Systematic Review, Fatemeh Tabari, Joel I. Berger, Oliver Flouty, Brian Copeland, Jeremy D. Greenlee, Karim Johari

Faculty Publications

Background Deep brain stimulation (DBS) reliably ameliorates cardinal motor symptoms in Parkinson’s disease (PD) and essential tremor (ET). However, the effects of DBS on speech, voice and language have been inconsistent and have not been examined comprehensively in a single study. Objective We conducted a systematic analysis of literature by reviewing studies that examined the effects of DBS on speech, voice and language in PD and ET. Methods A total of 675 publications were retrieved from PubMed, Embase, CINHAL, Web of Science, Cochrane Library and Scopus databases. Based on our selection criteria, 90 papers were included in our analysis. The …

Exploring Pathways Toward Open-Hardware Ecosystems To Safeguard Genetic Resources For Biomedical Research Communities Using Aquatic Model Species, Yue Liu, Jack C. Koch, Lucía Arregui, Allyssa Oune, Sarah Bodenstein, Maria T. Gutierrez-Wing, Terrence R. Tiersch

Faculty Publications

Development of reliable germplasm repositories is critical for preservation of genetic resources of aquatic species, which are widely utilized to support biomedical innovation by providing a foundational source for naturally occurring variation and development of new variants through genetic manipulations. A significant barrier in repository development is the lack of cryopreservation capability and reproducibility across the research community, posing great risks of losing advances developed from billions of dollars of research investment. The emergence of open scientific hardware has fueled a new movement across biomedical research communities. With the increasing accessibility of consumer-level fabrication technologies, such as three-dimensional printers, open …

Sexual Orientation-Based Microaggressions And Cannabis Use Outcomes Among Sexual Minority Individuals: The Impact Of Negative Affect And Coping-Motivated Cannabis Use, Evan M. Threeton, Paige E. Morris, Julia D. Buckner

Faculty Publications

Introduction: Sexual minority individuals report significantly more cannabis use and problems than their heterosexual peers, possibly due to their frequent experiences with sexual orientation-based microaggressions. As a result, sexual minority individuals may turn to cannabis use to cope with the negative affect associated with these experiences. No known studies have tested this hypothesis; therefore, the current study tested if sexual orientation microaggressions are positively associated with negative affect (anxiety and depression), cannabis coping motives, and cannabis-related outcomes (frequency, problems); if coping motives are positively associated with cannabis-related outcomes; and if negative affect and cannabis use to cope with negative affect …

Differential Risk: Gender And Racial Differences In The Relationship Between Trauma, Discrimination, And Schizotypy, Mahogany A. Monette, Madisen T. Russell, Danielle B. Abel, Jarrett T. Lewis, Jessica L. Mickens, Evan J. Myers, Megan M. Hricovec, David C. Cicero, J. Wolny, William P. Hetrick, Michael D. Masucci, Alex S. Cohen, Christopher J. Burgin, Thomas R. Kwapil, Kyle S. Minor

Faculty Publications

Traumatic experiences are associated with increased experiences of positive schizotypy. This may be especially important for People of Color, who experience higher rates of trauma and racial discrimination. No study to date has examined how racial disparities in traumatic experiences may impact schizotypy. Furthermore, of the studies that have examined the relationship between trauma and schizotypy, none have examined racial discrimination as a potential moderator. The present study examined if racial discrimination moderates the relationship between trauma and multidimensional (positive, negative, and disorganized) schizotypy. In a sample of 770 college students, we conducted chi-squared analyses, analyses of variance, and stepwise …