Digital Commons Network^™

Accurately Valuing Blue Carbon Sequestration And Storage To Foster Coastal Conservation Via Evidence-Based Policymaking And Model Environmental Services Statute Methodologies, John Shelton Penton Jr

LSU Doctoral Dissertations

Blue carbon ecosystems, especially mangrove forests, provide one of nature’s most effective means for sequestering carbon from the atmosphere and storing it in subsurface soils. The six nearshore coastal morphologies found in tropical and subtropical regions each possess a conspicuous environmental signature that can be employed to accurately estimate and predict mangrove forests’ carbon storage in above-ground biomass, below-ground biomass, and the soils by system type. The consistent geomorphology and geophysical processes within each of these coastal environmental settings, that is, the wave and tidal forcings, the rate of coastal sediment accretions, nutrient load and limitations (e.g., nitrogen-to-phosphorus …

From Nafta To The Usmca: How Does Protectionist American Economic Policy Impact Mexico’S Foreign Car Production?, Samantha Raeder

Honors Capstones

No abstract provided.

Overview Of Environmental, Social, And Governance Factors, How They Affect The Stability Of Bank Portfolios, And Mitigating The Risks Of Esg Factors, Sophia Torres

Honors Capstones

No abstract provided.

Religion And Dress Code Among Muslim, Christian, And Jewish Women In The Middle East And North Africa, Hannah Rodrigue

Honors Capstones

No abstract provided.

Retraction, N. Kinoshita, M. Paul, Y. Kashiv, P. Collon, C. M. Deibel, B. Digiovine, J. P. Greene, C. L. Jiang, S. T. Marley, R. C. Pardo, K. E. Rehm, D. Robertson, R. Scott, C. Schmitt, X. D. Tang, R. Vondrasek, A. Yokoyama

Faculty Publications

No abstract provided.

Cable Decoupling And Cable-Based Stiffening Of Continuum Robots, Parsa Molaei

LSU Master's Theses

Cable-driven continuum robots, which are robots with a continuously flexible backbone and no identifiable joints that are actuated by cables, have shown great potential for many applications in unstructured, uncertain environments. However, the standard design for a cable-driven continuum robot segment, which bends a continuous backbone along a circular arc, has many compliant modes of deformation which are uncontrolled, and which may result in buckling or other undesirable behaviors if not ameliorated. In this study, a detailed approach for using additional cables to selectively stiffen planar cable-driven robots without substantial coupling to the actuating cables is investigated. A mechanics-based model …

Louisiana Resident Perceptions On Invasive Aquatic Plant Species And Their Management, Anna Ribbeck

LSU Master's Theses

Determining the public perception of invasive species in Louisiana is an important tool to help shape and develop future management decisions, educational material and ultimately public policy. Therefore, the primary purpose of this study was to determine the perceptions of adult Louisiana residents regarding invasive aquatic plant species and their management. An online survey was used to collect data on registered Louisiana residential boaters’ perceptions towards invasive aquatic plants and their management. A postcard with a quick response code leading to the survey was mailed to 6,000 randomly selected Louisiana registered residential boaters. Of the 230 Louisiana registered boaters that …

An Examination Of Relationships Between Ear-Playing Skills And Intonation Skills Of High School And College-Aged Wind Instrumentalists, Ben Michael Herrick

LSU Doctoral Dissertations

Playing by ear and the ability to play in tune are components of musicianship that rely heavily on the ability to successfully discriminate musical pitches. Connections between ear-playing and intonation performance have rarely been addressed. The purpose of this study was to investigate relationships between intonation performance and ear-playing skills of high school and college-aged wind instrumentalists. Research questions were: (1) What is the relationship between the ability to play by ear and intonation performance? (2) How does intonation ability differ when the participants sightread notation compared to performing music that was learned by ear? (3) Do differences appear in …

Diminishing Benefits Of Urban Living For Children And Adolescents’ Growth And Development, Anu Mishra, Bin Zhou, Andrea Rodriguez-Martinez, Honor Bixby, Rosie K. Singleton, Rodrigo M. Carrillo-Larco, Kate E. Sheffer, Christopher J. Paciorek, James E. Bennett, Victor Lhoste, Maria L.C. Iurilli, Mariachiara Di Cesare, James Bentham, Nowell H. Phelps, Marisa K. Sophiea, Gretchen A. Stevens, Goodarz Danaei, Melanie J. Cowan, Stefan Savin, Leanne M. Riley, Edward W. Gregg, Wichai Aekplakorn, Noor Ani Ahmad, Jennifer L. Baker, Adela Chirita-Emandi, Farshad Farzadfar, Günther Fink, Mirjam Heinen, Nayu Ikeda, Andre P. Kengne, Young Ho Khang, Tiina Laatikainen, Avula Laxmaiah, Jun Ma

Population and Public Health Science Faculty Publications

Optimal growth and development in childhood and adolescence is crucial for lifelong health and well-being^1–6. Here we used data from 2,325 population-based studies, with measurements of height and weight from 71 million participants, to report the height and body-mass index (BMI) of children and adolescents aged 5–19 years on the basis of rural and urban place of residence in 200 countries and territories from 1990 to 2020. In 1990, children and adolescents residing in cities were taller than their rural counterparts in all but a few high-income countries. By 2020, the urban height advantage became smaller in most …

The Perceptions, Experiences, And Stories Of Tied-Migrant Music Educators: How The Personal And Professional Blend, Rachel K. Broyles

LSU Master's Theses

Centering around the purpose of examining the lived experiences and perspectives of self-identified tied-migrant music educators and how the transitory aspects of their personal lives impact their professional careers, this phenomenological case study discusses the findings of both a review of literature and completed original research utilizing two participants who are tied-migrant spouses in the music education field and examine their stories. For this study, tied- migrant spouses are defined as persons who are married to individuals who frequently relocate due to their professional occupation (Mincer, 1978). Participants include tied-migrant military spouses and tied-migrant civilian spouses.

Specific research questions include: …

Characterizing And Modeling The Impact Photorepair Conditions Have On Parameters Governing The Regrowth Of Escherichia Coli After Uvc Irradiation, And Investigating Potential Mitigation Strategies, Andrea J. Martinez Ballen

LSU Master's Theses

Ultraviolet disinfection has been used to treat water and wastewater for decades. Previous studies highlight the significance of disinfection conditions and attempt to model bacterial regrowth behavior according to disinfection dosing parameters. The emergence of light-emitting diode (LED) technology provides the ability to further explore bacterial repair methods after UV disinfection, which has been a growing concern within the UV community. However, it is necessary to also consider post-disinfection conditions to model the regrowth patterns of bacterial organisms more accurately. By varying reactivation wavelengths, and their respective intensities, experiments using Escherichia coli ATCC 15597 revealed how these parameters impact the …

Framing Addiction: How Variations Of News Stories Affect Attitudes Toward Addicts, James A. Smith

LSU Master's Theses

Stigma toward drug addicts and alcoholics can act as a barrier to treatment and, ultimately, result in more lives lost. Over previous decades, journalists have largely framed addicts as problematic to society which contributes to public stigma. Prior research in social medicine has found that non-news portrayals of treated addicts can improve public attitudes. Similarly, studies in mass communication have found that different ways of framing news stories can elicit different attitudes from news consumers. The purpose of this study is to test the effects of thematic framing, episodic framing, problem framing, and solution framing on readers’ attitudes when journalists …

Extending Token Economy Systems For Children With Learning Disabilities And Developmental Disabilities Using Operant Behavioral Economics, Parker Levins

LSU Master's Theses

Token economy systems have been used successfully in various general and special education classrooms. Although effective, educators seldom have a priori information on the performance of their reinforcers within the schedules of reinforcement that comprise the token economy. Most token economies are initially designed based on clinical judgment and respective schedules are typically selected on an arbitrary basis (e.g., token-production Fixed Ratio 1 [FR1], exchange-production FR5). This introduces uncertainty whereby the initial arrangement may be too lax (i.e., work expectations are low for the student) or too strict (i.e., work expectations are high for the student), which both have the …

Computational Reverse-Engineering Analysis For Scattering Experiments For Form Factor And Structure Factor Determination (“P(Q) And S(Q) Crease”), Christian M. Heil, Yingzhen Ma, Bhuvnesh Bharti, Arthi Jayaraman

Faculty Publications

In this paper, we present an open-source machine learning (ML)-accelerated computational method to analyze small-angle scattering profiles [I(q) vs q] from concentrated macromolecular solutions to simultaneously obtain the form factor P(q) (e.g., dimensions of a micelle) and the structure factor S(q) (e.g., spatial arrangement of the micelles) without relying on analytical models. This method builds on our recent work on Computational Reverse-Engineering Analysis for Scattering Experiments (CREASE) that has either been applied to obtain P(q) from dilute macromolecular solutions (where S(q) ∼1) or to obtain S(q) from concentrated particle solutions when P(q) is known (e.g., sphere form factor). This paper’s …

Will Digital Fashion Be The New Normal In The Metaverse Era: Examining Consumers’ Perceptions Of Digital Fashion, Yanbo Zhang

LSU Master's Theses

Digital fashion might bring an innovative and revolutionary answer to address environmental and social issues in the textile and apparel industry because it could simultaneously deliver sustainability and fashionability. To stay in the lead in the fashion kingdom and maintain innovativeness, luxury fashion brands are embracing digital fashion. Instead of constantly balancing or trading off between exclusive values and accessibility, luxury brands could enhance both through digital fashion items. As such, investigating consumers’ perceptions and evaluations of digital fashion in general and luxury brands’ digital fashion in specific is critical to fueling digital fashion. Accordingly, the current research has twofold …

The Black Performer's Toolbox: A Critical Authoethnography, Laura D. Oliver

LSU Doctoral Dissertations

Blackness shines bright like the moon and beams outside of identity parameters that are limiting in Western society to determine its communicative function inside and outside systems of power. When Blackness intersects with performance, various ways to construct identity are highlighted to expand our understanding of theory and methods that emphasize difference and culture. This research project aims to reimagine Blackness as a performance methodology to explore the performer’s livelihood onstage and constructions of race that impact identity offstage. Additionally, this project is built from a specific method created from the continuous use of expressive work that reflects societal challenges …

Frontal Polymerizations: From Chemical Perspectives To Macroscopic Properties And Applications, Benjamin A. Suslick, Julie Hemmer, Brecklyn R. Groce, Katherine J. Stawiasz, Philippe H. Geubelle, Giulio Malucelli, Alberto Mariani, Jeffrey S. Moore, John A. Pojman, Nancy R. Sottos

Faculty Publications

The synthesis and processing of most thermoplastics and thermoset polymeric materials rely on energy-inefficient and environmentally burdensome manufacturing methods. Frontal polymerization is an attractive, scalable alternative due to its exploitation of polymerization heat that is generally wasted and unutilized. The only external energy needed for frontal polymerization is an initial thermal (or photo) stimulus that locally ignites the reaction. The subsequent reaction exothermicity provides local heating; the transport of this thermal energy to neighboring monomers in either a liquid or gel-like state results in a self-perpetuating reaction zone that provides fully cured thermosets and thermoplastics. Propagation of this polymerization front …

Examining Real-Time Variations In Interpersonal Hopelessness And Suicidal Ideation Using Ecological Momentary Assessment, Jessica Lauren Gerner

LSU Master's Theses

The Interpersonal Theory of Suicide (ITS; Van Orden et al., 2010) hypothesizes that suicidal ideation (SI) arises from the simultaneous presence of thwarted belongingness (TB) and perceived burdensomeness (PB). For SI to intensify to suicidal desire, hopelessness about the changes in TB and PB must be present (Van Orden et al, 2010). Recent research on the ITS has moved away from a general measure of hopelessness, instead focusing on hopelessness specific to the interpersonal constructs of TB and PB (Tucker et al., 2018). This construct, referred to as interpersonal hopelessness (IH), is further broken down into two correlated but distinct …

The Influence Of Child Maltreatment In The Manifestation Of Anxiety And Depressive Symptoms At The Age 18, Maria J. Velasquez

LSU Master's Theses

Child maltreatment affects thousands of children and adolescents every year. This phenomenon is multidimensional, meaning there are different subtypes (i.e., physical abuse, sexual abuse, emotional abuse, and neglect) known to predict various mental health issues, including depression and anxiety. While previous research has investigated mental health outcomes in maltreated youth, results may vary based on the dimensions of abuse considered. This study aims to expand on previous literature to examine how a history of child maltreatment subtypes influences the manifestation of anxiety and depressive symptoms in youth at age 18. The current study uses secondary data analysis of the Longitudinal …

Motivators And Preferences Of Route Diversion During Roadway Incidents, Grace Cole

LSU Master's Theses

When confronted with congestion and delay, drivers often divert their route. Depending on factors like purpose, urgency, destination, route alternatives, type of disruption, and mode options, common diversionary options can range from changing departure time, route, and mode to canceling a trip altogether. One of the foundational building blocks of travel forecasting is traffic assignment, which is used to distribute trips over a network using complex algorithms to aggregately represent the desire of drivers to minimize travel time.

While these assignment models are backed by decades of research and observational experience, they are also limited by the fact that they …

Stellar Binaries And Post-Merger Evolution: A Framework For Stellar Evolution And Nucleosynthesis In R Coronae Borealis Stars, Bradley Munson

LSU Doctoral Dissertations

We have developed a framework for simulating binary stars through all three relevant
timescales: the dynamical merger, thermal, and nuclear evolution. The framework begins by simulating a dynamical merger in a 3-dimensional hydrodynamics adaptive mesh refinement code, Octo-Tiger, and performing a spherical averaging calculation to map the post-merger remnant into the 1-dimensional stellar evolution code, MESA. In this work, we primarily utilize this framework for simulating double white dwarf mergers, which are believed to be the progenitor to R Coronae Borealis (RCB) stars. We evolve the post-merger in MESA and compare the computed surface abundances to those observed …

Evaluating Sensory Quality, Willingness To Try, Risk And Product Appropriateness Of Seafood Byproducts, Silvia Jessenia Murillo Miguez

LSU Master's Theses

Valorization of food wastes/byproducts has become a major subject of research to increase sustainability of the global food supply chain. Seafood industries generate a substantial quantity of byproducts. An online survey was used to evaluate Willingness-to-try (WTT), the effect of a Consumer Safety Statement (CSS) on WTT, perceived risks and product appropriateness associated with seafood byproducts in food as influenced by gender and race. Based on the finding from this survey, a clean label catfish bone powder (CBP) was developed and used for breaded catfish sticks which were evaluated for sensory liking, emotional profile, and purchase intent. Previous consumers of …

Modelling Illiquid Stocks Using Quantum Stochastic Calculus, Will Hicks

Journal of Stochastic Analysis

No abstract provided.

Diurnal Time-Activity Budget And Habitat Use Of Whooping Cranes (Grus Americana) In The Reintroduced Louisiana Nonmigratory Population, Phillip L. Vasseur, Sammy L. King, Michael D. Kaller

Faculty Publications

Time-activity budget studies provide valuable insights for better understanding animal behavior relative to spatial and temporal habitat use. We examined a reintroduced, nonmigratory Whooping Crane (Grus americana) population to determine how time-activity budgets change relative to crane age, sex, habitat type, and season. Our study area encompassed natural marshes and working wetlands primarily in southwestern Louisiana. From June 2012 to January 2016, we conducted continuous focal sampling on individuals (n = 27) from the first 4 captive-reared cohorts released in the state. We classified age groups as juveniles, subadults, and adults, and identified 5 main habitat types utilized by cranes …

Ranked Document Retrieval In External Memory, Rahul Shah, Cheng Sheng, Sharma Thankachan, Jeffrey Vitter

Faculty Publications

The ranked (or top-k) document retrieval problem is defined as follows: preprocess a collection {T1,T2,... ,Td} of d strings (called documents) of total length n into a data structure, such that for any given query (P,k), where P is a string (called pattern) of length p ≥ 1 and k ϵ [1,d] is an integer, the identifiers of those k documents that are most relevant to P can be reported, ideally in the sorted order of their relevance. The seminal work by Hon et al. [FOCS 2009 and Journal of the ACM 2014] presented an O(n)-space (in words) data structure …

Effective Connectivity Of Functional Mri Via Deep Learning Methods, Kai-Cheng Chuang

LSU Doctoral Dissertations

Effective connectivity, based on functional magnetic resonance imaging (fMRI) time series signals, is the quantification of how strongly brain activity in a certain source brain region contributes to brain activity in a target brain region, independent of the contributions of other source regions. Current methods to solve this problem have several limitations. They are either unable to model nonlinear relationships between source and target signals, unable to efficiently quantify time lags in source-target relationships, unable to identify time-varying relationships, or fail to account for variability in the hemodynamic response function that converts neuron activity to a measurable signal. In this …

Fighting The Illicit Antiquities "Artworld": A Critical Approach To The Heritage Laws Of Guatemala, Irene Marti Gil

LSU Doctoral Dissertations

This dissertation examines the suitability of the legal framework for the protection of cultural heritage in Guatemala, which is the country of origin for over thirty percent of the Maya objects traded in the antiquities market, and proposes strategies that improve the effectiveness of the law. To examine the heritage laws enforced by the Republic of Guatemala, I implement linguistic anthropological methods of qualitative research.

Discourse Analysis, Critical Discourse Analysis, and Conceptual Analysis on the national heritage policies of Guatemala reveal the existence of ontological problems regarding the conceptualization of heritage as a monolithic entity reflecting a State-led narrative with …

“Buried In The Bones”: Medical Racial Trauma And Mistrust In Black Families, Destiny Jelks

LSU Master's Theses

This exploratory study used a mixed-methods design and phenomenological approach to examine the ways in which the United States’ history of medical racism impacts Black young adults and their attitudes toward the healthcare system as well as healthcare utilization. This study examines the phenomenon through the lense of critical race theory, family systems theory, and historical trauma theory. This study also explored the concept of the intergenerational transmission of trauma focusing on medical racial trauma and medical mistrust in Black families.

The Impact Of Case Management Intervention For Insured Asthma Patients In Louisiana, An Empirical Study, Mohamed Mohamed Ohaiba

LSU Doctoral Dissertations

Asthma is a chronic condition whose symptoms are managed/prevented using medication and interventions. The overarching objective of this study was to evaluate the impact of patients' demographics on case management enrollment and healthcare utilization, as well as to develop machine learning models to predict high-cost patients.

To accomplish these goals, the Man-Whiteness test, the chi-squares test, logistic regression and odds ratios, and machine learning models were implemented. The average cost of the non-enrolled CM group was significantly higher than the enrolled group (p-value .0001). In addition, the non-enrolled groups had considerably more visits to the emergency department than the other …

What Are The Most Effective Proxies In Identifying Storm-Surge Deposits In Paleotempestology? A Quantitative Evaluation From The Sand-Limited, Peat-Dominated Environment Of The Florida Coastal Everglades, Qiang Yao, Kam Biu Liu, Zhenqing Zhang, Erika Rodrigues, Marcelo Cohen, Kanchan Maiti, Yang Yang

Faculty Publications

Although many studies have attempted to reconstruct millennial-scale hurricane patterns using various proxy-based methods, it is still unclear what the most effective proxies are to identify storm surge deposits in different environmental settings. This study quantitatively compares the application of grain-size, loss-on-ignition, stable isotopes, X-ray fluorescence, and palynological proxies in paleotempestology from an organic-rich environment in the Florida Everglades. The nonparametric tests indicate that only 9 among the 27 parameters (mean diameter, %water, %organic, %carbonate, Ca, Sr, Ca/Ti, Cl/Br, and marine microfossils) exhibited significant differences between storm-surge and in situ deposits. The principal component analysis shows that five marine indicators …