Digital Commons Network^™

Changes In Wetland Soil Processes And Ecosystem Functions Six Years After Marsh Creation In Barataria Bay, Louisiana, Erol R. Knaus

LSU Master's Theses

Louisiana contains about 40% of the conterminous United States coastal and estuarine wetlands but also has the highest rates of wetland loss at around 80% of the total. Approximately 4,900 km² of coastal land in Louisiana has been lost since 1930. Our study location, Barataria Bay, has one of the highest coastal wetland erosion rates in the nation, at ∼41 km² per year; and therefore, is a high priority for wetland restoration activities. In 2014, sandy sediment dredged from the bed of the Mississippi River was placed in Barataria Bay as part of a restoration effort. Samples were …

A Comparison Of Intertidal Metazoan Biodiversity Between Previously Oiled Sheared And Intact Marsh Margins And Between Multiple Salinity Zones In The Coastal Marshes Of Louisiana, Patrick M. Rayle

LSU Master's Theses

Marshes in Louisiana are under threat from numerous natural and anthropogenic sources. A consequence of these threats are sheared marsh margins, which result from the impact of storm surge on previously oiled, weakened marsh. These conditions occurred in Louisiana marshes after Hurricane Isaac in 2012 followed the Deepwater Horizon oil spill in 2010, particularly in the shorelines surrounding Bay Jimmy. The second and third chapters of this thesis focus on the differences in biodiversity between the sheared and intact marsh margins in impacted sites in Bay Jimmy. Metabarcoding methods were used to determine community composition of the sediment within marsh …

The State Of Immigration: An Analysis Of Attitudes Towards Immigration Policies, Economic Context And Political Ideology, Heather Kuntz

LSU Master's Theses

Division of attitudes towards immigration policy is more polarized than ever (Public Religion Research Institute, 2018). Historically, restrictive attitudes towards immigration policies have been highest in times of rising nationalist ideals and economic vulnerability (Jaret, 1999; Ngai, 2004). Primarily a federal responsibility, immigration enforcement was decentralized and that power shared with individual states (Pantoja, 2006), leading to policy disparities among states (Butz & Kehrberg, 2019; Gulasekaram et al., 2015; Johnson, 2019). Studies focusing on the relationship between state economic context and immigration policies, found that states that are more economically vulnerable had higher numbers of restrictive immigration policies (Ybarra et …

Emulsion Templating Application For Synthesis Of A Porous Zein Biocompatible Oil Adsorbent, Nathan Holley

LSU Master's Theses

The recovery of spilled oil from water sources using hydrophobic porous absorbent has gained significant interest due to the ease of implementation, large-scale adaptability, and robust nature of the technique. However, the lack of biodegradability of these synthetic adsorbents has caused concern of further contaminating the environment from the generation of microplastic waste that is known to persist and accumulate in the marine food chain and other ecosystems. To mitigate this potential hazard, a new biocompatible alternative is needed to replace the non-degradable synthetic materials currently used. This thesis presents ZEin-based Low Density porous Absorbent (ZELDA), synthesized using a particle …

Characterization Of Memory T-Lymphocyte Subsets In Dogs, Annie Beth Bauman

LSU Master's Theses

A more complete understanding of canine T-cell immunity is necessary for improving diagnostic and therapeutic approaches to canine diseases, developing cell-based canine immunotherapeutics, and evaluating dogs as large mammal models for comparative immunology research. Canine immunological studies are limited by the lack of established phenotypic markers identifying diverse differentiation states in canine T-cells. Differential expression of CD45RA (indicating antigen experience) and CD62L (indicating lymph node homing capability), shows promise as a tool to delineate canine naïve (TN), central memory (TCM), effector memory (TEM), and terminal effector memory (TEMRA) T-cells. The aim of this study was to characterize canine memory T-cell …

Transport-Related Social Exclusion In East Baton Rouge Parish, Andrew Dietz

LSU Master's Theses

Transportation systems are powerful tools, capable of entrenching existing inequalities or facilitating the pursuit of a more equitable society (Wellman, 2015). This is particularly true for urban areas that are plagued by sprawl, congestion, and racialized poverty like East Baton Rouge Parish. Transport-related social exclusion (TRSE) provides a framework for understand the relationship between access to transportation (or lack thereof, known as transport disadvantage) and individuals’ ability to participate in the economic, social, cultural, and political aspects of life (Kamruzzaman, Yigitcanlar, Yang, & Mohamed, 2016) Transport-related social exclusion is associated with numerous negative outcomes including poor mental and physical health, …

Using The Seventh Rib Length And Depth Measurements As A Method To Estimate Ancestry And Sex In Adults, Alexandria M. Amaki

LSU Master's Theses

This study tested the correlation of dimensions of the left seventh rib (L7) to ancestry and sex in adult humans. The first hypothesis, based on Bergmann’s theory, is that Black (African-American) individuals will have smaller L7 dimensions than White individuals (Americans of primarily European descent). The second hypothesis is that males, due to sexual dimorphism, will have larger ribs than females. 299 individuals from the Hamann-Todd Skeletal Collection were used in the study, approximately evenly distributed among sex and ancestry groups. Five variables were examined, including three measurements (length, width, and width point), and two calculations (area and ratio). A …

Anxiety And Depression's Incremental Effect On Executive Functioning Deficits In Children And Adolescents, Paige Picou

LSU Master's Theses

Children and adolescents experiencing anxiety and/or depression experience impairment in a myriad of domains and often engage in maladaptive strategies that then exacerbate or prolong their current symptomology. However, there is still a paucity of research examining anxiety and depression’s impact on executive functioning in children and adolescents, and existing research is muddled with problems in how researchers both define and choose to measure executive functioning. This study aims to clarify some of the conflicting research on anxiety and depression’s impact on executive functioning by using Barkley’s hybrid theory of executive functioning to determine whether anxiety and depressive symptomology add …

Smart Rutting And Cracking Resistant Asphalt Pavement Incorporating Shape Memory Polymers, Guoqiang Li

College of Engineering Patents

The low temperature cracking and high temperature rutting of polymer-modified asphalt concrete pavement can be reduced. The composite includes asphalt and at least one polymer that expands at low temperature, triggered by cooling-induced tensile stress, to reduce thermal cracking. The composite includes at least one polymer that expands at high temperature, so that the composite recovers after compression induced by traffic loading at higher temperatures, thereby reducing rutting. The system reduces thermal stress, and reduces or even eliminates thermal cracking and rutting. Shape memory polymers (SMPs) are used to improve asphalt compositions so that they better resist both thermal cracking …

Methods For Temporary Fracture Isolation, Arash Dahi Taleghani, Guoqiang Li

College of Engineering Patents

Methods for temporary fracture isolation are provided. An existing fracture is treated with a chemical diverter. The chemical diverter is exposed to conditions causing it to expand, plugging the fracture. A new fracture can be created through the application of pressure and fluid, without disrupting the plugged fracture. The chemical diverter can then be removed through biodegradation or the application of a solvent to reopen the first fracture.

Energy-Constrained Distinguishability Measures For Assessing Performance In Quantum Information Processing, Kunal Sharma

LSU Doctoral Dissertations

The aim of this thesis is to develop a framework for assessing performance in quantum information processing with continuous variables. In particular, we focus on quantifying the fundamental limitations on communication and computation over bosonic Gaussian systems. Due to their infinite-dimensional structure, we make a realistic assumption of energy constraints on the input states of continuous-variable (CV) quantum operations. Our first contribution is to show that energy-constrained distinguishability measures can be used to establish tight upper bounds on the communication capacities of phase-insensitive, bosonic Gaussian channels -- thermal, amplifier, and additive-noise channels. We then prove that an optimal Gaussian input …

Jake Runestad, An American Triptych: A Conductor's Guide, Neviton Barros

LSU Doctoral Dissertations

Jake Runestad is a fresh voice within the new wave of successful twenty-first century American choral composers. Among the growing number of very popular works within his expanding opus, Runestad has compiled three of his independently conceived compositions into a cycle he titles, American Triptych. The determination to group these works together in a cycle, Reflections (2016), The Piece of Wild Things (2013), and Come to the Woods (2015), was largely based on a common textual thread since all three authors are naturalist writers – Henry David Thoreau, Wendell Berry, and John Muir.

All three are written for SATB chorus …

Exploring Shared Leadership And Multi-Organizational Collaboration In Sport For Development And Peace, Seungmin Kang

LSU Doctoral Dissertations

Although multi-organizational collaborations have become a trend in the Sport for Development and Peace (SDP) sector, existing research remains limited to collaborations between two organizations. Further, researchers continue to report managerial challenges of the multi-organizational collaborations and emphasize leadership as a key component for achieving desired outcomes in SDP collaborations. Thus, the purpose of this research was to explore the role of shared leadership in multi-organizational SDP collaboratives. Three research questions guided this study to explore the role of shared leadership through the lived experiences of SDP practitioners: (a) How is leadership shared between members in multi-organizational SDP collaboratives?, (b) …

Preventing School Absenteeism: The Case For Relationships, Rachel Denise Pounders

LSU Master's Theses

Chronic absenteeism affects nearly 20% of high school students every year (ED, 2016). It is an indicator of students at-risk and the strongest indicator of student dropout. Poor outcomes and risk indicators associated with chronic absenteeism are well established, but little is known about factors that could mitigate chronic absenteeism among vulnerable high school students. This study explored the potential influence of teacher, counselor, and peer relationships on chronic absenteeism in students, after controlling for sex, race, and socioeconomic status. The nationally representative sample came from the National Longitudinal Study of 2009 (NSLS:09) and included 17,777 students. Data were collected …

Predictive Modeling Of Fmol Health System Utilization Using Machine Learning Algorithms And Retrospective Study Of Covid Tested Patients, Ramyakrishna Tummala

LSU Master's Theses

Overutilization of Emergency Departments (ED) is a major problem among the health care providers in the United States. In this research, a machine learning-based predictive model for predicting ED high utilizers will be designed based on a set of existing and proposed facilities and the population and social determinant of health (SDOH) factors influencing utilization. The purpose of the model will be to alert the healthcare systems and government organizations by identifying the reasons for overutilization of the medical services among the people in a particular community. Also, the novel coronavirus disease 2019 (COVID-19) developed in Whunan city, China has …

Brown's Stages Of Morphosyntactic Development Applied To The Typical Development Of Italian, Marie Laiche

LSU Master's Theses

Background: In A First Language (1973), Roger Brown called for an increase in crosslinguistic data and analysis of morphosyntax across languages as more research in this field is crucial for working out the overarching determinants of language acquisition order and for the ability to accurately compare child language acquisition across different languages. An increase in this research would benefit linguistic researchers and speech-language-pathologists offering services to or evaluating children speaking a different language or more than one language. The current study seeks to add to the field of crosslinguistic research by adapting Brown’s guidelines of English language acquisition to the …

Identity Construction In The Yoruba Group Project Abroad: Discourse Analysis Of Language Use, Tawakalitu Odunayo Lasisi

LSU Master's Theses

This research examines the experiences of five Nigerian Americans who participated in the Yoruba Group Project Abroad in the year 2018. After taking classes on Yoruba language at the basic, intermediate and advanced levels in their various universities here in the US, the students traveled to Nigeria in the summer of 2018 to immerse themselves in the native speakers’ environment in Ibadan, Nigeria. While in Ibadan, they were paired with Nigerian host families (Yoruba speakers) in order to have an overarching immersive experience. These students constitute the population of this research. Using a qualitative research method and an in-depth online …

Critical Role Of The Baf Chromatin Remodeling Complex During Murine Neural Crest Development, Kathleen Wung Bi-Lin, Pratap Veerabrahma Seshachalam, Tran Tuoc, Anastassia Stoykova, Sujoy Ghosh, Manvendra K. Singh

Division of Basic Science Faculty Publications

The BAF complex plays an important role in the development of a wide range of tissues by modulating gene expression programs at the chromatin level. However, its role in neural crest development has remained unclear. To determine the role of the BAF complex, we deleted BAF155/BAF170, the core subunits required for the assembly, stability, and functions of the BAF complex in neural crest cells (NCCs). Neural crest-specific deletion of BAF155/BAF170 leads to embryonic lethality due to a wide range of developmental defects including craniofacial, pharyngeal arch artery, and OFT defects. RNAseq and transcription factor enrichment analysis revealed that the BAF …

Temperature Gradient Effects On Behavior And Design Of Prestressed Concrete Girder Bridges, Ahmed Saad Elsayed Mohamed Elshoura

LSU Doctoral Dissertations

Temperature variation is an inevitable environmental loading type that affects bridges. Considering temperature effects during structural design is deemed essential for short, medium, and long span bridges. Temperature loading can be categorized into three components; uniform temperature, vertical temperature gradient, and transverse temperature gradient. Temperature variation causes additional movements, stresses, and internal forces that should be considered in the design of bridges. In this study, the temperature effects of vertical and transverse temperature gradients are investigated for continuous prestressed concrete bridges.

Thermal restraint moments induced by vertical temperature gradients on prestrssed concrete bridges are investigated by performing three-dimensional (3D) finite …

Micro- And Macroevolution Of Drab Plumage Color In Birds, Rafael Marcondes

LSU Doctoral Dissertations

I address the evolution of drab bird colors at micro- and macroevolutionary scales. I use as a study system the Furnariida, a clade of >600 Neotropical passerine species that, despite tremendous ecological and morphological diversity, are colored almost exclusively in shades of brown and grey produced by melanin pigments.

In chapters two and three, I took a macroevolutionary approach and showed that (1) plumage colors in the Furnariida evolve at similar rates in a monochromatic clade, males of a dichromatic clade, and females of a dichromatic clade; (2) ventral plumage color evolves faster than dorsal; (3) bird species that occupy …

A Modular System For Treating Moving Anatomical Targets With Scanned Ion Beams At Multiple Facilities: Pre-Clinical Testing For Quality And Safety Of Beam Delivery, Michelle Lis, Wayne Newhauser, Marco Donetti, Moritz Wolf, Timo Steinsberger, Athena Paz, Marco Durante, Christian Graeff

Faculty Publications

Background: Quality management and safety are integral to modern radiotherapy. New radiotherapy technologies require new consensus guidelines on quality and safety. Established analysis strategies, such as the failure modes and effects analysis (FMEA) and incident learning systems have been developed as tools to assess the safety of several types of radiation therapies. An extensive literature documents the widespread application of risk analysis methods to photon radiation therapy. Relatively little attention has been paid to performing risk analyses of nascent radiation therapy systems to treat moving tumors with scanned heavy ion beams. The purpose of this study was to apply a …

Resource And Energy Recovery From Wastewater Using Advanced Bioelectrochemical Systems, Sidan Lu

LSU Doctoral Dissertations

Water pollution and energy depletion are two critical issues in the world that limit the sustainable development of human society. In this study, several advanced (photo) bioelectrochemical systems (BESs) were proposed for effective energy (electricity and H₂) and nutrients (N and P) recovery from wastewater, solar energy, seawater, and river water. The first study demonstrated high effectiveness of a novel resource-recovery microbial fuel cell (RRMFC) for wastewater treatment and nutrient recovery from synthetic urine-containing wastewater. Over one cycle (∼3 days), 99% of urea, 97% of COD, 99% of histidine, 91% of creatinine, 99% of sodium acetate, 98% of …

A Systematic Multiscale Investigation Of Nanoparticle-Assisted Co2 Enhanced Oil Recovery (Eor) Process For Shale Oil Reservoirs, Dayo A. Afekare

LSU Doctoral Dissertations

Shale oil reservoirs are prolific on the short term due to hydraulic fracturing and horizontal drilling but experience significant production decline, leading to poor ultimate recovery and leaving billions of barrels of oil buried in the ground. In this study, a systematic multi-scale investigation of an enhanced oil recovery (EOR) process using relatively inexpensive silicon dioxide nanoparticles and carbon dioxide for shale oil reservoirs was conducted. Using the Tuscaloosa Marine Shale (TMS) as a case study, aqueous dispersions of nanosilica in conjunction with CO₂ were investigated at nano-to-core scales. At the nanoscale, atomic force microscope was used to investigate …

Educational Theory-Embedded Training For Construction Industry Professionals, Hazem Jadallah

LSU Doctoral Dissertations

Workforce training is needed throughout the construction industry to create and maintain competent workers; unfortunately, most construction training and education research focuses on university student education. The focus of this dissertation research is the current state of educational-theory embedded construction workforce training, how such trainings are effective, and how they may be further optimized based on established educational theory. This is accomplished through a review of construction training for current industry professionals, an evaluation of the assessment criteria used to measure effectiveness, followed by the creation of a framework for construction training.

There is a lack of recommendations for improvement …

Defect Engineering In Strained Low-Dimensional Abo3 Perovskite Nanoparticles For Next-Generation Energy Storage, Tochukwu Ofoegbuna

LSU Doctoral Dissertations

The realization of renewable energy is dependent on the advancement of multi-functional materials for energy storage devices. As an example, the substantial progress observed in Li-ion batteries is a result of the discovery and subsequent industrial commercialization of cathode materials such as LiFePO₄ (LFP). Although these materials possess relatively high specific capacity (~170 mAh/g), their low room-temperature electronic conductivity has been identified as a limitation for future high-performance batteries. Metastable SrBO₃, (SBO, B = Nb, Ta, Mo, etc.) perovskite nanoparticles (NPs) with metallic properties offer an alternative route to improve the room-temperature electronic conductivity of LFP cathodes. …

Quijano As Quijote: Decoding Madness Through Psychological Theory, Cristian Rivera

LSU Master's Theses

This thesis approaches Alonso’s Quijano’s conversion into Don Quijote from the point of view of a psychologist. The aim of this thesis is to explain the cognitive and psychological experiences that move Alonso Quijano to become Don Quijote and its impact in the development of our current studies of the mind. Thus, one specific question will direct my project although this question will be addressed using a multidisciplinary psychologist approach. The research question is “How can Alonso Quijano’s psychological experiences and interpretations of the real world be explained today?” This question will be addressed by referencing five episodes in the …

"The Rest Is Lagniappe": The Female Secondary Band Director Experience In Louisiana, Margaret M. Webb

LSU Master's Theses

The purpose of this case study is to examine the experience of female secondary band directors in southeastern Louisiana. Six female band directors in Louisiana were interviewed using video-conferencing. Of the six, four were middle school directors and two were high school directors. The semi-structured interviews took place in three phases: 1) musical influences and experiences from birth through college, 2) early teaching experience, and 3) current teaching experience. Data analysis included four phases of coding; open, axial, closed, and selective. Coding uncovered multiple themes in the findings. Themes were categorized as the following: (1) Becoming a Band Director, (2) …

Plant Community Response To The Combined Effects Of Elevation, And Simulated Nutrient And Sediment Loading In Sagittaria Lancifolia-Dominated Wetlands, Donnie Day

LSU Master's Theses

Coastal wetlands are experiencing threats to their long-term sustainability brought about by the combined effects of relative sea-level rise and human modifications to hydrology, sediment delivery and nutrient loading. Restoration and management strategies can include adding sediment to the surface of deteriorating marshes to facilitate positive feedbacks among elevation, plant productivity, sediment trapping, and accretion; however, if delivered using nitrate-enriched river waters, belowground biomass and soil organic matter pools may be negatively affected, resulting in the acceleration of wetland loss. Overall, there is limited information on the combined effects of nutrient loading, sedimentation, and flooding dynamics in regulating feedbacks among …

The Perceived Importance And Ability Of Secondary Agricultural Education Teachers Regarding Accommodating Students With Exceptionalities: A Mixed Methods Study, Raegan Ramage

LSU Master's Theses

Each year, the number of students who have a documented disability in public schools in the U.S. has increased. However, SBAE instructors continue to identify a lack of confidence when teaching students with exceptionalities. This lack of confidence is exacerbated by a lack of professional development opportunities and preservice training offered by teacher preparation programs regarding teaching students with special needs. To better understand this complex issue, this mixed methods investigation sought to describe Louisiana SBAE instructors’ previous educational experiences focused on accommodating students with special needs and describe their desired professional development opportunities regarding accommodating students with special needs. …

Mapping Louisiana's Missing: Spatiotemporal Profiling Of Louisiana's Missing Persons- An Experimental Application Of Geographic Information Systems And Forensic Anthropology, Liam J. Johnson

LSU Master's Theses

The growing number of unresolved unidentified and missing persons cases in the United States is this nation’s ‘silent mass disaster’ (Ritters, 2007). In addition to contextualizing biocultural traits of these cases, forensic anthropologists are uniquely qualified to address this underrecognized humanitarian crisis due to their proven ability to bridge conflicting stakeholders in often complex sociopolitical environments and to create improved opportunities for community collaboration. This project explores local and state demographic trends of missing persons cases and how this information can be used to assist investigative agencies with their missing population, analyzes gaps in identification data, and selects optimal locations …