Digital Commons Network^™

Pore-Scale Analysis Of Interfacial Instabilities And Impact Of Heterogeneity On Relative Permeability By Lattice Boltzmann Method, Zhipeng Zhu

LSU Master's Theses

Interfacial instabilities occur often during immiscible fluid flow through porous media and their understanding is essential for waterflooding operations or other oil recovery processes. Although many studies including experimental and numerical have been done to reproduce and analyze the interfacial instabilities in porous median, there is still significant knowledge gap in fundamental understanding of these flow instabilities at the pore-scale. In order to better understand the interfacial instabilities phenomenon, the pore-scale simulations are performed. In this study, Lattice Boltzmann Method is used to simulate two different types of interfacial instabilities: viscous fingering and capillary fingering in irregular sphere packs by …

Development, Acceptability, And Emotional Responses Of Low-Sodium Roasted Peanuts And Flavored Spreads, Kairy Dharali Pujols Martinez

LSU Doctoral Dissertations

The objective of this research was to evaluate the feasibility of developing acceptable low-sodium products by using a salt-replacement technique, an oil-in-water emulsion system, and health benefit information to improve consumers’ awareness of low-sodium diets. Three experiments were conducted: (I) Sensory characteristics and optimization of low-sodium roasted peanuts by substitution of NaCl with KCl, and addition of glycine (Gly) as a bitterness blocker; (II) Rejection threshold (RjT) of KCl added to low-sodium roasted peanuts using a 2AC-test; (III) Development of acceptable low-sodium and sodium-free spreads by flavor modification and their use on turkey salad sandwiches. In study I, results showed …

In Depth Look Into The Transformational Leadership Of Southern University And Agricultural & Mechanical College At Baton Rouge: A Focus On Engaging Economy, Diversity, And Implications For Community, Aubry Gatlin Turner

LSU Doctoral Dissertations

Deficiencies in economic resources and unwelcoming practices toward diversity represent two issues facing current American higher education institutions. Budget deficits have plagued higher education across America, and especially here in Louisiana. As a result, higher education institutions in Louisiana have become, and continue to be, targets for state funding cuts, with certain HBCUs, like Southern University, suffering the brunt of the cuts because of decades of inadequate funding.

Along with revenue shortfalls, Louisiana institutions and others across America are seeing demands to strategize diversity efforts. As most institutions follow federal guidelines to diversify the campus, some are facing challenges because …

Differences In The Electrophysiological Properties Of Mouse Somatosensory Layer 2/3 Neurons In Vivo And Slice Stem From Intrinsic Sources Rather Than A Network-Generated High Conductance State, Fernando R. Fernandez, Bahar Rahsepar, John A. White

Faculty Publications

No abstract provided.

Analysis Of Alternative Forage-Based Pasture Systems For Maximizing Profitability In Grass-Fed Beef Production, Zachary Turnage

LSU Master's Theses

Two alternative forage-based pasture systems in the United States Gulf Coast region were analyzed for maximizing profitability in grass-fed beef production over a two-year period from 2016 to 2017. The pasture systems varied upon forage types, forage combinations, and different degrees of management complexities used in grass-fed beef production. Forty-eight fall-weaned steers were assigned to eight groups of six steers each and randomly selected into different pasture systems. Two years of experimental data from the LSU AgCenter Iberia Research Station in Jeanerette, Louisiana, was reported to derive and compare cost and return estimates for each system. A representative farm approach …

Artificial Recharge Of Groundwater As A Management Tool For The Kabul Basin, Afghanistan, Mohammad Farid Masoom

LSU Master's Theses

Decades of war and political instability, consecutive droughts, population increase and displacement, caused serious infrastructural damages to water resources of Afghanistan. The main source of water supply for people in Afghanistan is groundwater. However, over-exploitation of groundwater has led to groundwater level declines in most parts of the country. Kabul, the largest city of Afghanistan, is the capital city with a population of 4.5 million and the fifth fastest-growing city in the world. The city has observed groundwater level declines of 5-10 meters (m) since 1980. Decline of about 30 m has also been observed in one of the monitoring …

Perceptions Of Religious Music In A Southern U.S. Public Middle School: A Case Study, Emily Marie Mercado

LSU Doctoral Dissertations

Intercultural experiences can result in increased knowledge of and positive attitudes towards unfamiliar cultural groups (Neto, Pinto, & Mullet, 2016; Vuoskoski, Clarke, & DeNora, 2017). Deardorff’s (2006) intercultural competence process framework provides a method for exploring and categorizing elements of intercultural competence including attitudes, knowledge/skills, internal outcomes, and external outcomes.

This narrative instrumental case study examined the perceptions of one middle school choir teacher, choir students, the student teacher, the parents, and the vice principal when implementing a researcher-designed unit titled: Religious Choral Music from the Christian, Jewish, and Muslim Worlds. The choir teacher offered a unique perspective as an …

Silica-Conjugated Polymer Hybrid Fluorescent Nanoparticles: Preparation By Surface-Initiated Polymerization And Spectroscopic Studies, Sourav Chatterjee, Tony E. Karam, Cornelia Rosu, Chun Han Wang, Sang Gil Youm, Xin Li, Changwoo Do, Yaroslav Losovyj, Paul S. Russo, Louis H. Haber, Evgueni E. Nesterov

Faculty Publications

© 2018 American Chemical Society. Organic/inorganic hybrid nanoscale materials possess fascinating optical, electronic, magnetic, and catalytic properties that are promising for a variety of practical applications. Such properties can be dramatically affected by the hierarchical structure and molecular organization in the nanomaterials. Herein, we employed surface-initiated Kumada catalyst-transfer polymerization to prepare hybrid materials consisting of shells of conjugated polymers (CPs) - polythiophene or poly(p-phenylene) - and their block copolymers covalently attached to the surface of silica nanoparticles. Because of the controlled chain-growth mechanism of surface-initiated polymerization, we obtained structurally well-defined CP blocks in the diblock copolymer shells, which produced distinct …

Role Of Mucin 19 In The Respiratory Tract, Kaitlin Mcbride

LSU Master's Theses

Human metapneumovirus (HMPV) is a negative sense, single stranded RNA virus belonging to the Pneumoviridae family, and represents an important pathogen that causes severe respiratory disease worldwide. There is currently no vaccine against HMPV, so it is important to study the aspects of the immune response induced by HMPV. Because infiltration of mucus is a hallmark of HMPV infection, it is warranted to study the role of mucus in the disease process. Mucin proteins make up the major component of mucus and can be found within the airway and lungs. Previous work from our laboratory demonstrated a high upregulation of …

Identifying The Influences Of Psychological Factors On Fashion Customization, Sukyung Seo

LSU Master's Theses

As environmental concerns have been increasing and fashion market condition has been fierce and competitive ever before due to consumers’ ever-changing fashion tastes, customization has received growing attention considering as a solution to overcome those challenges. Despite the numerous attention, research on customization has been limited to only issues from business viewpoints whereas studies from consumers’ standpoints are little.

The purpose of the study was to examine how consumers’ psychological properties (i.e., self- promotion, need for uniqueness, self-expression, social identity, self-monitoring, and other-directedness) affect buying intention of customized apparel products mediated by perceptions of customization and extended-self. To achieve the …

Rebel Governance In Civil War: Variations In Rebel Governance - A Case Study Analysis., Harriet Ann Sellers

LSU Master's Theses

Insurgent groups vary in how they interact with civilians. Some insurgent groups perform government functions to further their political objectives during civil war, whilst other rebel groups use solely violent means. Why do some insurgent groups perform governance functions to further their political objectives, whilst others interact very little with the local population? I seek to explain the variation in rebel governance, which I argue is motivated by the objective of the insurgency. More specifically, I argue that secessionist insurgencies are more likely to implement governance structures than non-secessionist insurgent groups. Using an in-depth case study analysis, I found varying …

The Impact Of Observation Duration On The Dependability Of The Direct Behavior Rating- Classroom Management External Rater Form (Dbr- Cm Er), Kaitlin Angela Cassidy

LSU Master's Theses

Classroom management skills are evidence-based strategies used to maintain a productive learning environment. The Direct Behavior Rating – Classroom Management: External Rater Form (DBR-CM ER) is an indicator for assessing classroom management. Utilizing classroom management strategies has been proven effective; however, limited tools are available for assessing such skills and further assessment of the reliability and dependability of such measures is needed. Calculating inter observer agreement (IOA) assesses evidence for inter-rater reliability and IOA results were about 87%. Additionally, the study evaluated the variance contributing to the ratings produced by the DBR-CM ER. A fully crossed analytic design (p x …

Teaching College Writing To High School Students: A Mixed Methods Investigation Of Dual Enrollment Composition Students' Writing Curriculum And Writing Self-Efficacy, Erin Dena Scott-Stewart

LSU Doctoral Dissertations

The purpose of this mixed methods study was to use a quantitative survey to assess the relationships between the credit pathways students choose to earn first-year, first-semester (FYFS) university writing credit (i.e. dual enrollment, Advanced Placement, university courses, and ACT/SAT exemptions) and several writing experiences and outcomes, including writing curriculum, self-efficacy, self-regulatory strategy use, and course performance. The same survey was also used to explore relationships between these writing experiences and outcomes and preexisting student characteristics (i.e. race/ethnicity, gender, and parents’ education). For dual enrollment (DE) students only, the following aspects of the participants’ writing experiences were also investigated using …

The Relationship Between Audit Quality And Competition At The Intersection Of The Large And Small Audit Firm Markets, Jeanne-Claire Alyse White

LSU Doctoral Dissertations

This paper examines the relationship between audit quality and several measures of spatial competition. Spatial competition is measured as the smallest absolute difference in audit fee market shares from an audit firm and its closest competitor. In this paper, spatial competition measures are referred to as competitive distances, and they are calculated within the large audit market (Big 4 only), within the small audit market (non-Big 4 only), and between the large and small audit markets. Audit market competition and its effect on audit quality has been an ongoing debate. On one side of the argument, competition may negatively impact …

Γ -Soft Rotor With Configuration Mixing In The O(6) Limit Of The Interacting Boson Model, Feng Pan, Shuli Yuan, Zheng Qiao, Jiachao Bai, Yu Zhang, Jerry P. Draayer

Faculty Publications

To describe obvious intruder states and nonzero quadrupole moments of γ-soft nuclei such as Pt194, a rotor extension plus intruder configuration mixing with 2n-particle and 2n-hole configurations from n=0 up to n→ in the O(6) (γ-unstable) limit of the interacting boson model is proposed. It is shown that the configuration mixing scheme keeps the lower part of the γ-unstable spectrum unchanged and generates the intruder states due to the mixing. It is further shown that almost all low-lying levels below 2.17 MeV in Pt194 can be well described by modifying the O(6) quadrupole-quadrupole interaction into an exponential form. The third-order …

Operational Impact Of Shadow Evacuation On Regional Road Networks During Short-Notice Emergency Evacuations, Efe Emre Tuncer

LSU Master's Theses

As part of evacuation planning, development of effective tactical and operational strategies are essential to safely and efficiently mobilize the public away from the threat. Evacuations are classified by the time between notification and the anticipated arrival of the threat which can be categorized as short, or no-notice emergencies. Emergencies involve the computation of the time required to evacuate the area of risk, which is the time to clear a radius of up to about 10-miles around the nuclear power plant, known as the emergency planning zone (EPZ). These evacuation time estimates (ETE) also account for the evacuation of the …

Emmanuel Levinas And The Meaning Of Ecological Responsibility, Joe Matthew Larios

LSU Master's Theses

Recent work in eco-phenomenology has often tried to find a way to situate Emmanuel Levinas’s ethical philosophy in a way that would be productive for environmental ethical concerns. This has often proved difficult due to the anthropocentrism of Levinas’s philosophy and the sometimes inconsistent interpretations of what the face of the Other signifies and whether it should be understood as perceptually present to the one who “sees” it in any way. This, combined with a general lack of engagement with Levinas’s writings on politics, has often made an ecological interpretation of Levinas difficult or awkward.

In this thesis, I try …

The Incremental Validity Of Parent-Reported Executive Functioning In Attention-Deficit/Hyperactivity Disorders And Reading Achievement, Ilayna Krysten Mehrtens

LSU Master's Theses

Attention-Deficit/Hyperactivity Disorder (ADHD) is a commonly diagnosed neuropsychological disorder in childhood. Children with ADHD are at an increased risk for comorbid learning disorders, particularly in reading. Attempts to understand the factors that contribute to the high co-occurrence of these disorders have identified Executive Functioning (EF) as a potential explanatory mechanism for this relationship. However, previous findings regarding the role of EF have been mixed. Additionally, much of the research regarding the influence of EF on reading achievement among children with ADHD has been limited to performance-based measures of EF. Subsequently, there is little research regarding the relative influence of behavioral …

Analysis Of Marine Sediment By Chemical Signatures And Loss-On Ignition To Discover Evidence Of Ancient Maya Activities At Site 74, Paynes Creek Salt Works, Belize, Kobi Weaver

LSU Master's Theses

In this thesis, archaeological sediment chemistry, loss-on ignition and microscopic analysis of marine sediment are used to study Site 74 of the Paynes Creek Salt Works in southern Belize. Site 74 was once an ancient Maya salt work. Due to sea-level rise, sea water and mangrove peat now cover the site. Sediment from the site was exported under permit to the Louisiana State University Laboratory. I prepared and delivered the samples to the Louisiana State University Agricultural Chemistry Laboratory for inductively coupled plasma- atomic emission spectroscopy testing (ICP-AES). ICP-AES measured the amount of 20 elements in the sediment. Maps showing …

Identifying Stress Variables Linking Socioeconomic Status And Smoking, Aaron French Waters

LSU Master's Theses

Smoking is the leading cause of preventable death accounting for approximately 480,000 deaths every year (Jamal et al., 2015). Across the socioeconomic status gradient smoking prevalence differs greatly, with those of lower socioeconomic status smoking at much higher rates. Within the literature relationships have been identified between socioeconomic status, stress variables, and smoking. However, little research has explored the possibility of stress variables mediating the relationship between socioeconomic status and smoking. The goal of the current study was to identify stress variables linking socioeconomic status and smoking in order to identify variables to address in cessation programs for …

Evaluating Classifiers' Optimal Performances Over A Range Of Misclassification Costs By Using Cost-Sensitive Classification, Ramy Al-Saffar

LSU Master's Theses

We believe that using the classification accuracy is not enough to evaluate the performances of classification algorithms. It can be misleading due to overlooking an important element which is the cost if classification is inaccurate. Furthermore, the Receiver Operational Characteristic (ROC) is one of the most popular graphs used to evaluate classifiers performances. However, one of the biggest ROC’s shortcomings is the assumption of equal costs for all misclassified data. Therefore, our goal is to reduce the total cost of decision making by selecting the classifier that has the least total misclassification cost. Nevertheless, the exact misclassification cost is usually …

Higher Energy Gap Control Of Fluorescence In Conjugated Polymers, Chien-Hung Chiang

LSU Doctoral Dissertations

Chemo- and biosensors based on fluorescent conjugated polymer benefit from greater detection sensitivity due to amplification of the electronic perturbations produced by analyte binding. This amplification stems from the exciton-transporting properties of conjugated polymers. A conventional design paradigm relies on the analyte binding events which generate sites of lower energy relative to the polymer energy: either fluorescence quenching sites (turn-off sensors) or bathochromically shifted fluorophores (turn-on sensors). In both type sensors, the excitons migrate to the lower-energy site created by analyte binding.

This dissertation primarily focused the investigation of an alternative paradigm when analyte binding creates higher energy gap sites …

A Cycle Of Giving: Transforming Individuals, Transforming Community In A Louisiana Children's Choir, Jason Paul Bowers

LSU Doctoral Dissertations

Kids’ Choir, a community children’s choir in Baton Rouge, Louisiana, formed in 2014 as part of the Kids’ Orchestra organization. The organization, founded in 2011, is El Sistema-inspired—a model developed in 1975 by Venezuelan orchestra conductor, José Abreu. The model’s mission is “to effect social change through music for children with the fewest resources and the greatest need” (Mission Statement, 2017).

El Sistema's focus on social change through musical excellence may hold great promise in the United States where neighborhoods are becoming increasingly diverse. Moreover, the El Sistema philosophy responds directly to issues of segregation still present in the Baton …

Concerto For Horn And Orchestra And Sofia Gubaidulina's Serialism, Michael Paul Mitchell

LSU Doctoral Dissertations

This work is in two parts. The first is a composition for horn and orchestra by the author, using a variety of styles that I have learned while at Louisiana State University and inspired by the pieces I have played on the horn. The second part is an analysis of Sofia Gubaidulina’s works that include twelve-tone serial techniques and the devices she uses in them and how her style changed through composing these three pieces, Piano Sonata (1965), Five Etudes for Harp, Double Bass, and Percussion, and Night in Memphis composed in 1968. After these pieces Gubaidulina leaves the …

Sanctum Drag Featuring St. Joseph As A Structural Vulnerability, Phillip Gregory Spotswood

LSU Master's Theses

Sanctum Drag is a hybrid work that gnaws at the boundaries of personal and public, performative and lived. Within, St. Joseph, as the patriarch of the Catholic Church, is dismantled through a series of elegies, maps, and plays. Throughout, the characters and speakers are auditioning and experimenting towards new means of reproduction, outside of the logic of heteronormativity and marriage. Like the various characters, the form of the text is always shifting, always searching its own edges. The mutating forms create a call-and-response, one form taking up where another form fails. Failure, then, becomes a crucial practice for the speakers …

History Of Journalism Education: An Analysis Of 100 Years Of Journalism Education, Hilary Akers Dunn

LSU Master's Theses

This quantitative content analysis uses course descriptions to find changes in journalism education at the University of Missouri, Louisiana State University, and the University of North Carolina over 100 years. This study found that there are two influencing factors that are inherent to the journalism profession: advances in technology and the maturity of the profession itself. These two influencing factors produced changes in technology used in curriculum, course focus (e.g. skill, theory, general knowledge, and history), and course topics (e.g. advertising, broadcasting, public relations, etc.) This study also found that leadership is the most influential factor of change in journalism …

Vertical Sediment Accretion In Jamaica Bay Wetlands, New York, Ryan Christopher Clarke

LSU Master's Theses

Over the last century, ~60% of the saltmarsh wetlands in Jamaica Bay (in the Gateway National Recreation Area of the Greater New York City region) have been converted to intertidal or subtidal unvegetated mudflats and projections suggest that all of Jamaica Bay’s saltmarsh wetlands may disappear within the next two decades. After landfall of Hurricane Sandy in 2012 and to better understand environmental controls on the maintenance of the remaining Jamaica Bay wetlands, cores were collected from twelve saltmarsh locations in the bay to study the chronology of wetland vertical accretion and mineral sediment accumulation. In association with the United …

R1 Retrotransposons In Drosophila Melanogaster Are Transcribed By Rna Polymerase I Upon Heat Shock, Himanshu Shekhar Raje

LSU Doctoral Dissertations

The ribosomal RNA genes of Drosophila melanogaster reside within centromere-proximal nucleolar organizers on both the X and Y chromosomes. Each locus contains between 200-300 tandem repeat rDNA units that encode 18S, 5.8S, and 28S ribosomal RNAs (rRNAs) for ribosome biogenesis. In arthropods like Drosophila, about 60% of rDNA genes are inserted with R1 and/or R2 retrotransposons at specific sites within the 28S regions; these units likely fail to produce functional 28S rRNA. We showed previously that R2 expression increases upon nucleolar stress caused by the loss of a ribosome assembly factor, the Nucleolar Phosphoprotein of 140 kDa (Nopp140). Here …

Conflict Among Comrades: Elite Purges And Political Violence In Authoritarian Regimes, Austin Scott Matthews

LSU Doctoral Dissertations

This dissertation intends to provide answers to the following research questions: Why do some dictators forcibly remove their top ruling elites from power? If dictators choose to purge an individual, what influences their choice about whether to include punitive violence as part of the action? This work contributes to the field of research on elite interaction and political violence within authoritarian regimes. I advance three main theories on purges and violence. First, I argue that purges of ruling elites are more likely during a period of weakness that follows regime change, declining in likelihood over time as the regime ages …

Sh-Wave Seismic Reflection Imaging And Inversion: An Analysis Of Architectural And Physical Properties Of A Near-Surface Point-Bar, Nathan William Benton

LSU Master's Theses

Both architecture and physical properties of near-surface point-bar sediment packages have not be imaged or analyzed via SH-wave seismic reflection surveying, respectively. Point-bar architecture within near-surface environments characterized by conductive, saturated, and/or unconsolidated sediments cannot be well-imaged with other remote sensing methods compared to the SH-wave seismic reflection surveying method. The physical properties that distinguish different point-bar sediment packages are variably altered during early-stage diagenetic processes such as compaction and dewatering, thereby changing SH-wave seismic velocities and subsequently shear impedance of different sediment packages. This study accomplishes two objectives by acquiring, processing, and inverting seismic reflection data from two surveys …