Digital Commons Network^™

Investigation Of Gas Dynamics In Water And Oil-Based Muds Using Das, Dts, And Dss Measurements, Temitayo S. Adeyemi

LSU Master's Theses

Reliable prediction of gas migration velocity, void fraction, and length of gas-affected region in water and oil-based muds is essential for effective planning, control, and optimization of drilling operations. However, there is a gap in our understanding of gas behavior and dynamics in water and oil-based muds. This is a consequence of the use of experimental systems that are not representative of field-scale conditions. This study seeks to bridge the gap via the well-scale deployment of distributed fiber-optic sensors for real-time monitoring of gas behavior and dynamics in water and oil-based mud. The aforementioned parameters were estimated in real-time using …

Prescribed Fire Effects On Microbial Communities And Functions In Managed Ecosystems, Viet Dao

LSU Doctoral Dissertations

Microbes (both fungi and bacteria) serve important ecosystem functional roles in nutrient cycling and decomposition, which affect ecosystem response following disturbances such as prescribed fire. A multitude of abiotic and biotic factors influence microbial community compositions, which then drive microbial ecosystem functions. The factors driving microbial communities further change due to fire disturbances and progression with time. Although prescribed fire is commonly used as a technique for ecosystem management, the effects of fire on microbial communities or their functions are simply understudied. Ecosystem management decisions tend to focus on plant and ecosystem post-fire responses. Thus, incorporation of fire effects on …

Characterizing And Mitigating Transient Noise In Ligo Observatories For Gravitational Wave Detection, Jane Glanzer

LSU Doctoral Dissertations

The existence of gravitational waves is predicted by Albert Einstein's Theory of General Relativity. Commonly referred to as "ripples in spacetime", these waves are generated by some of the most violent and energetic processes in the universe. Despite their theoretical prediction over a century ago, it wasn't until 2015 that the Advanced LIGO (aLIGO) interferometers in Hanford, WA and Livingston, LA directly detected gravitational waves for the first time, confirming Einstein's theory and ushering in a new era of astrophysics.

Detecting gravitational waves requires incredible precision. Because of the extreme sensitivity required, it is possible for the gravitational wave data …

Problem-Solving In The Preparation Of Teachers For Agricultural Education: A Mixed Methods Study Investigating The Effect Of Metacognitive Awareness And Cognitive Ability On Students Enrolled In An Introductory Agricultural Mechanics Course, Whitney Figland

LSU Doctoral Dissertations

Cognitive and metacognitive ability have been identified as a critical factor that influences individuals to successfully problem-solve. However, recent research has indicated that students do not have the necessary 21st-century skills to be successful in the workplace. This issue has been confounded by the lack of school-based agricultural education (SBAE) teachers’ limited knowledge regarding effectively teaching decision-making skills and the use of teaching methods that promote problem-solving. Therefore, this study sought to understand the effect that cognitive and metacognitive ability had on the problem-solving of students who are enrolled in an Introduction to Agricultural Mechanics course at Louisiana State University. …

Language Beliefs And Practices Of Caregivers In The Deep South, Maria Maldonado

LSU Master's Theses

The 30 million word gap refers to the disparity in early language exposure between low socioeconomic status (SES) children and their higher SES peers; a gap that is thought to negatively impact children’s language development and future academic success. Although many early intervention approaches have proven effective in promoting language development among low SES children, they often fall short in terms of cultural responsiveness, which in turn affects caregiver buy-in. Culturally and linguistically diverse children disproportionately live in poverty, as such there is a need for research to inform more responsive interventions that take a strengths- based approach and build …

What Is Eai? A Short History Of The Style’S Evolution And Development Of Identifiable Characteristics, Dylan Burchett

LSU Doctoral Dissertations

EAI (Electro-Acoustic Improvisation) has long presented issues pertaining to its definition and practice. This is due to the wide range of acoustic and electronic sounds present in the style as well as the style’s stated adherence to improvisation. This stated adherence to improvisation and wide potential range of acoustic and electronic sounds seem to clash with EAI’s stylistic consistencies. Because the EAI style has been difficult to define, it has also been difficult to place historically within experimental music traditions. In order to clarify the definition, practice, and historical positioning of EAI and identify where the style’s boundary lines around …

The Association Between Problematic Drinking And Ends Use In College Students: The Role Of Alcohol Expectancies, Nina Glover

LSU Master's Theses

Electronic nicotine delivery system (ENDS) use and alcohol use are prevalent among young adults and college students. Recent data indicate that ENDS use is significantly associated with alcohol consumption and hazardous drinking behavior (e.g., binge drinking). Given the perceived benefits students report that are common across ENDS and alcohol use (e.g., tension reduction), it is important to examine the role these beliefs play in the co-use of alcohol and ENDS, as both behaviors are associated with risks. In the present study, we investigated the relationship among ENDS use, alcohol use, ENDS use motives, and alcohol expectancies in undergraduate college students …

Running To Or Running From: Exploring The Phenomenology Of Off-Cycle Turnover In Entry Level Housing Professionals, Kate Gannon-Cullinan

LSU Doctoral Dissertations

Housing and residence life as a functional area serves as a major entry point for careers in higher education and student affairs. With the majority of annual job postings within entry-level, live-in housing roles, the future of the field may well be predicted in these high-impact, high-turnover positions on college campuses. As these functional areas continue to struggle to find themselves fully-staffed throughout their academic year cycle, the impact on both the student experience and organizational health is impacted. This study utilized an interpretive phenomenological approach to explore the experiences and feelings of those entry-level, live-in housing professionals who chose …

Investigating Gulf Coast Aquifer System: Stratigraphy Reconstruction, Inverse Modeling, And Groundwater Stress Assessment, Shuo Yang

LSU Doctoral Dissertations

The Mississippi Embayment aquifer system (MEAS) and the Coastal Lowlands aquifer system (CLAS) provide substantial groundwater resources for human activities in the U.S. Gulf Coastal Plain. However, the overexploitation has led to groundwater depletion in the MEAS and the CLAS, threatening sustainable groundwater use. Such concern highlights the crucial need for an advanced understanding of stratigraphy and groundwater in these aquifer systems, which is essential for effective regional groundwater management. This dissertation presents a comprehensive investigation of MEAS and CLAS in the Louisiana and southwestern Mississippi region, encompassing three fundamental dimensions: stratigraphy reconstruction, groundwater modeling, and groundwater stress assessments. A …

In-Person, Hybrid, Or Remote: Exploring The Effectiveness Of Teacher Practices On Student Performance During The Covid-19 Pandemic, Ashley M. Segalla

LSU Doctoral Dissertations

Schools and universities had to make unexpected changes beginning in Spring 2020 because of the COVID-19 pandemic. In Spring 2021, one university in the southern region of the United States implemented hybrid teaching formats in College Algebra courses, where students attended half of the classes in-person, and the remaining half of classes were attended synchronously and remotely. The purpose of this mixed methods study was to determine if students’ attendance methods (virtual or in-person) impacted their academic performance in the course. Additionally, the study sought to determine how students and the instructor felt student performance was impacted by hybrid attendance. …

Halosulfuron Plus Prosulfuron And Propanil Interactions For Weed Control In Louisiana Rice Production, John A. Williams

LSU Master's Theses

A greenhouse study was conducted on November 18, and December 2, 2020 at Louisiana State University in Baton Rouge, Louisiana to evaluate the interaction between a pre-packaged mixture of halosulfuron plus prosulfuron mixed with propanil for alligatorweed control. Antagonism occurred when halosulfuron plus prosulfuron at 55 g ha-1 was mixed with propanil at 2,242 g ha-1 at all evaluation dates and antagonism was also observed with halosulfuron plus prosulfuron at 83 g ha-1 mixed with propanil at 2,242 g ha-1 at all evaluation dates except 14 DAT with observed controls of 69 to 77% compared with expected controls of 94 …

"In The Footsteps Of Hercules": The Influence Of Classical Antiquity On Eighteenth-Century Militaries, Scott Madere

LSU Doctoral Dissertations

This project examines the pervasive influence of ancient Roman and Greek figures, historical events, literature, and military methods on the leaders and practitioners of eighteenth-century warfare. Rulers, generals, military theorists, and officers frequently consulted classical histories and literature for solutions to the common military problems of the period – tactical, operational, and strategic – showing remarkable faith in ancient military methods despite their growing dependence on gunpowder weaponry and related technologies. This dissertation examines why this was the case and concludes that classical antiquity not only maintained the credibility of its wisdom in the context of modern warfare, but also …

Examining The Effects Of Differential Reinforcement And Time-Out On Unsafe Playground Behavior, Elizabeth K. Linton

LSU Master's Theses

The purpose of this study was to examine the effects of differential reinforcement (DRO) without extinction, and then the additive effects of time-out, on reducing unsafe playground behavior. The results of the DRO in isolation phase indicated that DRO alone was only consistently effective in reducing or eliminating unsafe behavior for one out of four participants. The other three participants moved on to the multielement comparison where the combination of DRO and time-out (DRO+TO) condition was added. The DRO+TO condition reduced and eliminated unsafe playground behavior for all participants who experienced the condition. Those participants engaged in higher levels of …

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

LSU Doctoral Dissertations

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

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

LSU Doctoral Dissertations

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

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

LSU Doctoral Dissertations

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

Yiannis Constantinidis "Petite Suite" For Violin And Piano Transcribed For Cello Quarte: Synthesizing Foreign Inspirations And Greek Folk Melodies To Shape A Distinct National And Individual Genre., Eirini Triantafyllia Barouta

LSU Doctoral Dissertations

This paper accompanies my transcription for Cello Quartet of Yiannis Constantinidis' "Petite Dodekanese Suite" originally composed for violin and piano. Constantinidis, skillfully weaves Greek folk-inspired elements with classical forms and techniques in his "Petite Suite for Violin and Piano." The chamber piece serves as a testament to Constantinidis' mastery, as it intricately melds folk melodies, rhythms, and modes from the rich musical traditions of Greece with classical structures. This fusion imparts a distinctly Greek character to the composition, evoking a profound sense of nostalgia and connecting the listener to the cultural heritage and spirit of the Greek people. The paper …

In Search Of The Armorial Aesthetic: The Counter-Reform Of Ariano Suassuna And The Compositional Techniques In Clovis Pereira’S Suite Macambira, Wagner De Oliveira Duarte

LSU Doctoral Dissertations

Throughout the first half of the twentieth century, in the wake of the Week of Modern Art in São Paulo in 1922, Brazil grappled with defining its national identity, distinct from European influences. While eminent figures such as Villa-Lobos, Camargo Guarnieri, and Francisco Mignone provided foundational narratives in this quest, the Armorial movement emerged as a unique and emblematic response to these nationalistic aspirations.

Originating from the creative vision of Ariano Suassuna, the Armorial movement, though often perceived as a regional initiative, epitomized a broader endeavor to represent Brazil's diverse cultural tapestry. Central to understanding this movement is the work …

Death, Dreaming, And Diaspora: Achieving Orientation Through Afro-Spirituality, Liz Johnston, Jaime Elizabeth Johnston

LSU Doctoral Dissertations

Enslavement, colonization, and the systems that uphold racial injustice were and still are a series of new, unfathomable, and challenging experiences that prompt individuals within the diaspora to seek orientation. How does a human cope with centuries of attempts at the systematic destruction of their humanity, culture, and identity? How can they reclaim that identity, especially when so much of it seems lost? I address these questions by utilizing texts from the expansive body of work regarding ethnographic-historical-religious studies on Afro-spiritual practices to better analyze instances in literature in the ongoing practice of diasporic orientation. In this project, I argue …

Incubating Education: The Lived Experiences Of Louisiana Elementary And Middle School Teachers When Piloting A 4-H Stem School Enrichment Curriculum, Crystal Rose Ahrens

LSU Doctoral Dissertations

This study addressed a deficiency in the agricultural literacy of the U.S. population by focusing on the challenges that core subject teachers face when integrating agriculture into their curriculum. Using a phenomenological research approach, this investigation explored the lived experiences of Louisiana teachers who piloted a 4-H STEM curriculum, focusing on the growth in agricultural literacy of the teachers while instructing third and eighth-grade students on the agricultural-based and STEM-focused topic of embryology. Employing a transcendental phenomenological approach, I acknowledged my biases through reflexivity and adhered to ethical considerations, including informed consent and confidentiality. Key findings emerged through four themes …

If You Build It, Will They Come? Assessing Habitat Quality For Marsh Birds At Created Marshes In Southeastern Louisiana, Katherine Aylett Lipford

LSU Master's Theses

Wetland loss occurs at an alarming pace globally, with extremely high rates along the northern Gulf of Mexico. Louisiana loses a football field of wetland every 100 minutes: that is 77,000 m² of wetland bird habitat lost daily. In Louisiana, marsh creation projects combat wetland loss, and while wildlife habitat is often used as a justification for restoration, wildlife receives little to no consideration during and after construction. Habitat characteristics such as site-specific hydrology, vegetation composition, and habitat structure affect the abundance of wetland birds and understanding these features is crucial to creating habitat that will benefit birds. My …

The Ecological Responses To Hydroperiod Of Wetland Plant Species Determined By Manipulated Soil Surface Elevation (Marsh Organs), Brandon Wolff

LSU Master's Theses

As sea level rise, subsidence, and abandonment of natural deltaic processes due to a highly engineered Mississippi River continue to threaten Louisiana’s coastal wetlands, the need for a system-wide understanding of natural wetland land-building and preservation processes has never been greater. A key component of any wetland is the ever-changing water environment that periodically floods and dries the marsh platforms. The flooding depth, duration, and frequency, known as the hydroperiod, along with salinity and soil fertility are key determining factors of vegetation and marsh types at a particular location. Different types of vegetation will have different growth characteristics such as …

Time, Place, & Purpose: The Performance Of Creole Identity In Louisiana, Rachel N. Aker

LSU Doctoral Dissertations

Though much of the early development of Louisiana Creole culture can be found in New Orleans, the culture spread and continued to grow throughout the rest of South Louisiana in both similar and different ways. Expanding beyond Joseph Roach’s treatment of Creole cultural performances in New Orleans in Cities of the Dead (1996) and journeying across land and water, this project identifies more Creole cultural performance as they emerge across place and time. I present Louisiana and the Gulf South as a kind of inland archipelago, with the currents of culture-creation moving in and around distinct community enclaves. The flow …

Machine Learning-Based Soybean Yield Prediction And Optimizing Lidar-Mounted Uav Efficiency, Leticia Santos

LSU Master's Theses

The first chapter of this thesis explores the predictive capabilities of random forests algorithm on datasets obtained from field plot experiments on crop management systems in soybean. Furthermore, the chapter presents a complementary analysis of model performance according to dataset sizes and two techniques on how to impute and deal with missing data. Random forests are being compared with standard statistical techniques such as linear regression on a well-structured, information-rich agronomic experiment. The key findings of this chapter includes the best hyperparameters adjustment and the identification of the dataset threshold for optimal algorithms performance. The second chapter has a research …

Mixed Method Study On Community College Instruction In Blended Social Science Courses, Andrea L. B. Eggenberger

LSU Doctoral Dissertations

Community colleges have teaching faculty whose primary focus is educating their students and providing service to their institution. Community college teaching research has focused on innovation, students’ expectations, and the use of active learning techniques to foster student success. Research on blended courses has focused on instructional practices, learner engagement, and the benefits of blended learning for the community college student population. This study explores the relationship between student’s perceptions of the work in a blended developmental psychology course at two community colleges in Louisiana and their professors’ instructional decisions for their blended courses. The multiple-case study uses a convergent …

Performative Mixing For Immersive Audio, Brian A. Elizondo

LSU Doctoral Dissertations

Immersive multichannel audio can be produced with specialized setups of loudspeakers, often surrounding the audience. These setups can feature as few as four loudspeakers or more than 300. Performative mixing in these environments requires a bespoke solution offering intuitive gestural control. Beyond the usual faders for gain control, advancements in multichannel sound demand interfaces capable of quickly positioning sounds between channels. The Quad Cartesian Positioner is such a solution in the form of a Eurorack module for surround mixing for use in live or studio performances.

Diffusion/mixing methods for live multichannel immersive music often rely on the repurposing of hardware …

An Intersection Of Science & Art: Vitrification Approaches And Open-Fabricated Tools For The Biomedical Model Sea Hare, Aplysia Californica, Allyssa M. Oune

LSU Master's Theses

The California sea hare (Aplysia californica) is an important biomedical model for molecular neurobiology, electrophysiology, learning, and memory due to their well-mapped and large neurons and well-characterized learning capabilities. The National Resource for Aplysia (NRA, University of Miami) maintains large stocks of live animals and relies on regular shipments of wild-caught individuals to maintain genetic diversity. This is labor and cost-intensive, and environmental changes could alter the availability of wild animals increasing the need to preserve this genetic resource. One solution is vitrification, ultra-fast cooling which produces an amorphous glass that minimizes damage to cells. Aplysia californica presents …

Surrogate-Assisted Simulation-Optimization Framework For Groundwater Management In A Multi-Aquifer System, Melika Mani

LSU Master's Theses

Uncontrolled groundwater exploitation can lead to aquifer depletion, land subsidence, and saltwater intrusion. Effective groundwater management is challenging due to the intricate nature of subsurface hydrogeology and spatiotemporally variable pumping, especially in a multi-aquifer system. To ensure sustainable withdrawal, multi-objective optimization is an effective tool for balancing management goals and drawdown effects. However, running simulation-optimization using detailed groundwater models is computationally expensive, pushing decision-makers to decide based on limited scenarios. In this study, a hydrogeological framework was constructed for the Capital Area, Louisiana, allowing for individual assessment of each unit to better understand each aquifer's condition. Moreover, a surrogate-assisted simulation-optimization …

Understanding And Modeling Drivers’ En-Route Diversion Behavior During Congestion, Mohammad Shapouri

LSU Doctoral Dissertations

In the field of transportation, traffic assignment models primarily have been used to forecast driver route preferences, translating their choices into traffic flow patterns across networks. These models are grounded in distinct behavioral theories and strive to explain how drivers navigate routes based on network features and personal tendencies. Using an aggregation approach, conventional traffic assignment models distribute demand among paths, considering utility and attractiveness. Despite their prevalent use in transportation planning and operations, the fundamental behavioral assumptions of these models have rarely been thoroughly explored. This gap is further compounded by their limited consideration of real-time adjustments and choices …

A Dance Of Resistance: The Puerto Rican Bomba As A Means To Challenge Intersections Of Discrimination On The Island, Daniel Loving

LSU Master's Theses

This thesis examines the Puerto Rican Bomba as a multifaceted cultural and political phenomenon, focusing on its pivotal role in challenging and subverting the enduring issues of racial and gender discrimination on the Island. Drawing from an interdisciplinary framework that encompasses cultural studies, anthropology, history, performance and film studies, this research elucidates the complex interplay between Bomba's rhythmic and choreographic elements, its historical evolution, and its contemporary significance in the context of Puerto Rico's sociopolitical landscape. By analyzing Bomba's historical roots in African and indigenous traditions, its adaptation during colonial and post-colonial eras, and its ongoing relevance in the struggle …