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The Vulnerability Of Louisiana To Hurricane Damage And The Value Of Wetlands For Hurricane Risk Reduction, James Luke Boutwell
The Vulnerability Of Louisiana To Hurricane Damage And The Value Of Wetlands For Hurricane Risk Reduction, James Luke Boutwell
LSU Doctoral Dissertations
Coastal Louisiana is annually threatened by coastal storms. Population grown, wetland loss, and potentially increasing storm frequency are likely to increase coastal vulnerability to these events. Increasingly, coastal management entities are managing land resources to reduce the economic impact of natural disasters with the use of natural infrastructure. This is true in Louisiana where the Louisiana Coastal Master Plan allocates billions of dollars to coastal restoration projects, many of which are intended to mitigate economic damages from tropical storms and hurricanes. Despite this significant proposed investment, the risk reduction value provided by these projects is not well known. This analysis …
Studies Of The Properties Of Designed Nanoparticles Using Atomic Force Microscopy, Steve Matthew Deese
Studies Of The Properties Of Designed Nanoparticles Using Atomic Force Microscopy, Steve Matthew Deese
LSU Doctoral Dissertations
The purpose of the research in this dissertation was to elucidate the intrinsic properties of how nanoparticles are different from bulk materials. This was done by mechanical and electronic studies of the properties of designed nanoparticles using advanced modes of atomic force microscopy. Information relating to the work functions, contact potential difference, Young’s Moduli, elasticity, and viscoelasticity can be investigated using state-of-the-art atomic force microscope (AFM) experiments. Subsurface imaging of polystyrene encapsulated cobalt nanoparticles was achieved for the first time using Force Modulation Microscopy (FMM) in conjunction with contact mode AFM. Previously prepared sample of polystyrene coated cobalt nanoparticles were …
Integration Of Optical Remote Sensor-Based Yield Prediction And Impact Of Nitrogen Fertilization, Harvest Date, And Planting Scheme On Yield, Quality, And Biomass Chemical Composition In Energy Cane Production In Louisiana, Marilyn Sebial Dalen
LSU Doctoral Dissertations
The established sugarcane industry in Louisiana is perceived as an advantage for biofuel industry because of the similarities of energy cane and sugarcane by way they are cultivated, harvested, and processed. This study was conducted at the LSU AgCenter Sugar Research Station in St. Gabriel, LA from 2013-2015 to evaluate the influence of planting scheme, N rate, and harvest date on energy cane yield, quality parameters, nutrient uptake, and biomass chemical composition. The relationship of vegetation indices (VI) with stalk, fiber yield, and N uptake of energy cane harvested at different dates was also evaluated. The experiments consisted of variety …
Fundamental Studies Of Humic Acid's Influence On Pollutant Toxicity To Aquatic Organisms, Rachel Dawn Deese
Fundamental Studies Of Humic Acid's Influence On Pollutant Toxicity To Aquatic Organisms, Rachel Dawn Deese
LSU Doctoral Dissertations
The main purpose of the research presented in this dissertation was to further understand the intricate and convoluted interactions between natural organic material, biological entities, and pollutants. This was achieved by utilizing humic acids (HAs) from differing sources, chemically modified humic acid, two biological entities (model biomembranes and Artemia Franciscana), and three types of pollutants (cations, surfactants, and carbon nanotubes). Fluorescence spectroscopy and model biomembranes were used to measure the change in HA’s ability to interact with the biomembranes in the presence of cations. Three differently sourced HAs, chemical modified HAs, and a range of cations were studied to elucidate …
Use Of X-Ray K-Edge Tomography And Interferometry Imaging Techniques For The Studies Of Brominated Flame Retardants, Mutairu Bolaji Olatinwo
Use Of X-Ray K-Edge Tomography And Interferometry Imaging Techniques For The Studies Of Brominated Flame Retardants, Mutairu Bolaji Olatinwo
LSU Doctoral Dissertations
The work presented in this dissertation is based on the studies of flame retardancy performance of various formulations consisting of brominated flame retardants (BFRs: Saytex 8010 and Green Armor) and their synergist, antimony trioxide (Sb2O3) in high impact polystyrene (HIPS). Chemical flame retardants are incorporated in polymers to improve their flame inhibition for optimal applications in electrical and electronic devices, furniture, printers and more. These flame retardant polymer blends are studied using the Underwriters Laboratory vertical burn test (UL 94) and X-ray imaging techniques such as X-ray K-edge absorption tomography and X-ray grating interferometry. The UL 94 burn test is …
The Effect Of Teacher Beliefs And Self-Efficacy On Environmental Education Program Implementation, Ashley Wilson Mullens
The Effect Of Teacher Beliefs And Self-Efficacy On Environmental Education Program Implementation, Ashley Wilson Mullens
LSU Doctoral Dissertations
This study describes the development and initial validation of a tool to measure teachers’ beliefs about environmental education (EE), perceptions about their own self-efficacy in implementing EE in their classroom, perceptions about the support they receive in regards to implementing EE in their classroom, the perceived motivators towards EE, and the perceived barriers towards EE. This instrument was then utilized to measure these five constructs and compare results between participants and non-participants of a school-based environmental education program. All respondents had positive beliefs about environmental education. Participants and non-participants did differentiate between their perceptions of self-efficacy, support, and motivators, suggesting …
Investigating Curriculum Use And Its Impact On Teachers And Their Practice, Tiah B. Alphonso
Investigating Curriculum Use And Its Impact On Teachers And Their Practice, Tiah B. Alphonso
LSU Doctoral Dissertations
This study provided insights into how upper elementary teachers from three southern school districts used standards based curriculum materials and the resulting changes in their beliefs, knowledge, and practice. Additionally, this study sought to identify whether the following four factors were predictors of change in teacher practice: coherence of the professional development program, opportunities to collaborate, years of teaching experience, and curriculum use. The participating school districts were selected through purposeful sampling with districts being chosen largely based on a strong commitment to implementing Eureka Math in their schools. For comparison purposes, a contrast school district was also included in …
Temporal Dynamics Of Benthic Responses To Habitat Disturbance In Coastal Plain Headwaters Of Southwestern Louisiana, Catherine Elizabeth Murphy
Temporal Dynamics Of Benthic Responses To Habitat Disturbance In Coastal Plain Headwaters Of Southwestern Louisiana, Catherine Elizabeth Murphy
LSU Doctoral Dissertations
Weak biotic responses to habitat gradients within Northern Gulf of Mexico streams have been attributed to spatial and temporal variability. Landscape and in-stream habitat descriptions are presented for watersheds within Pleistocene terraces of the Coastal Plains geomorphic province of Louisiana, USA. Geologic influences on stream habitat were inferred by comparing multivariate ordinations on physicochemical measurements between terraces. Seasonal variability was assessed during a drought year (2011) and a typical water year (2013). Within coastal plains of Louisiana, stream condition was more similar within terraces than within river basins. Permutational MANOVA models indicated significantly different stream habitat between Uplands and Prairie, …
Promoting Literacy Development In The Early Childhood Classroom: An Evaluation Of Phonemic Awareness And Phonics Instruction, Elise Catherine Mciver
Promoting Literacy Development In The Early Childhood Classroom: An Evaluation Of Phonemic Awareness And Phonics Instruction, Elise Catherine Mciver
LSU Doctoral Dissertations
Research has consistently demonstrated that literacy skills are associated with a host of benefits that are both substantial and long lasting. Given the implications of reading skill development, efforts to understand the most effective methods of teaching students how to read are consequential. Fortunately, substantial research has been conducted on this topic and has subsequently highlighted two essential building blocks of a balanced literacy framework: phonemic awareness and phonics. The current literature on the reading acquisition process shows that if students are to benefit from phonics instruction, they must have a certain level of phonemic awareness proficiency. The question remains, …
Particulate Inorganic Carbon Flux And Sediment Transport Dynamics In Karst: Significance To Landscape Evolution And The Carbon Cycle., Randall Lee Paylor
Particulate Inorganic Carbon Flux And Sediment Transport Dynamics In Karst: Significance To Landscape Evolution And The Carbon Cycle., Randall Lee Paylor
LSU Doctoral Dissertations
Research focused on three areas of karst hydrogeology and sediment transport that have been poorly studied in the past: the role of particulate inorganic carbon transport in calculating carbon sink rates in karst; rapid changes in surface vs. subsurface sediment mixing in karst conduits; and comparison of landscape denudation calculations using dissolved carbonate load vs. total dissolved/sediment load. Carbonate bedrock weathering is a significant component of the atmospheric carbon sink. Particulate inorganic carbon (PIC) in bed and suspended sediment load of karst waters is frequently dismissed as insignificant for calculating denudation and carbon transport/sink rates, but PIC flux has not …
Understanding Chemical Reactions In Novel Materials: From Metal Organic Frameworks To Oxyallyl Cations, Kiara Taylor-Edinbyrd
Understanding Chemical Reactions In Novel Materials: From Metal Organic Frameworks To Oxyallyl Cations, Kiara Taylor-Edinbyrd
LSU Doctoral Dissertations
The work of this dissertation investigates the chemical processes of novel materials through quantum mechanical calculations and molecular dynamics simulations. The first section of this work focuses on probing copper based metal organic frameworks (MOFs) for their ability to catalytically release nitric oxide from s-nitrosothiol (RSNO) precursors in a slow, controlled and sustained manner and compares these findings to a free copper ion/ethanol solution. Through the use of electronic structure calculations and molecular dynamics simulations, studies are carried out to better understand how the barriers of RSNOs approach to the catalytic copper center changes with modifications to the R-group (of …
Quantum Radiation Pressure Noise: Exposing The Quantum Mechanics Of Optomechanical Interactions, Robinjeet Singh
Quantum Radiation Pressure Noise: Exposing The Quantum Mechanics Of Optomechanical Interactions, Robinjeet Singh
LSU Doctoral Dissertations
The detection of gravitational waves has further motivated the scientists to push horizons for an improved sensitivity sphere of the advanced LIGO. Below 100 Hz, design sensitivity of the advanced LIGO is predicted to be limited by the quantum backaction or the quantum radiation pressure noise (QRPN). In this thesis, I present the experimental progress towards the measurement of the QRPN. This work is in part an effort towards establishing a tabletop test experiment to calibrate the QRPN evasion through various proposed schemes, and further bring to light new nonlinear optomechanical dynamics. The experiment consists of a high optical and …
Single Crystal Growth And Physical Property Investigations Of Ca-Feas-Based Superconductors, Jiayun Pan
Single Crystal Growth And Physical Property Investigations Of Ca-Feas-Based Superconductors, Jiayun Pan
LSU Doctoral Dissertations
The discovery of Fe-based superconductors marked the beginning of a new era in unconventional superconductors. To date, the underlying superconducting mechanism has not yet been fully understood. Among Fe-based superconductors, the relatively new members are Ca10PtnAs8(Fe2As2)5 (n = 3, 4) and CaFeAs2. They are unique because they contain special adjacent layers, i.e., metallic Pt4As8 in Ca10Pt4As8(Fe2As2)5, semiconducting Pt3As8 in Ca10Pt3As8(Fe2As2)5, and As chains in CaFeAs2. The focus of this research is to understand the electrical and magnetic properties of Ca10PtnAs8(Fe2As2)5 (n = 3, 4) and CaFeAs2 in both the normal and superconducting state. Single crystals Ca10Pt4As8(Fe2As2)5 and Ca10Pt3As8(Fe2As2)5 with different …
The Influence Of Selected Academic And Demographic Characteristics On The Success Of First-Year Students Enrolled In A Baccalaureate Nursing Program, Scelitta F. Bond
The Influence Of Selected Academic And Demographic Characteristics On The Success Of First-Year Students Enrolled In A Baccalaureate Nursing Program, Scelitta F. Bond
LSU Doctoral Dissertations
The primary purpose of the study was to determine the influence of selected demographic and academic characteristics on success in nursing education among first year baccalaureate nursing students enrolled in a private college in the Southern region of the United States. The participants in the study were 102 baccalaureate students admitted to the nursing program in Fall, 2013. For the purpose of the study, success was defined as a grade of C or higher in two clinical nursing courses in the first year of the nursing program. Academic and demographic criteria were examined and compared using means, standard deviations, Independent …
Data-Driven Rational Drug Design, Yun Ding
Data-Driven Rational Drug Design, Yun Ding
LSU Doctoral Dissertations
Vast amount of experimental data in structural biology has been generated, collected and accumulated in the last few decades. This rich dataset is an invaluable mine of knowledge, from which deep insights can be obtained and practical applications can be developed. To achieve that goal, we must be able to manage such "Big Data'' in science and investigate them expertly. Molecular docking is a field that can prominently make use of the large structural biology dataset. As an important component of rational drug design, molecular docking is used to perform large-scale screening of putative associations between small organic molecules and …
Thermoelectric Properties Of Novel Layered Transition-Metal Compounds, Zhenyu Diao
Thermoelectric Properties Of Novel Layered Transition-Metal Compounds, Zhenyu Diao
LSU Doctoral Dissertations
This dissertation is designed to search for new good thermoelectric materials. Considering that both the low dimensionality and high spin entropy are in favor of thermoelectric performance, we focused on several layered transition-metal compounds including Bi2Sr2Co2O9-δ, Sr3(Ru1-xMnx)2O7, BaMn2Sb2 and Ba2Mn3Sb2O2. By investigating their structural, electrical and thermal transport, and magnetic properties, we discuss the relationship between structure, thermoelectric, and magnetic properties in these materials. For Bi2Sr2Co2O9-δ, both single crystal and thin film forms were studied. Among all films, the film grown 675 ℃ has the best power factor (S2/ρ, where S is Seebeck coefficient and ρ is electrical resistivity), which …
Process Monitoring And Data Mining With Chemical Process Historical Databases, Michael Carl Thomas
Process Monitoring And Data Mining With Chemical Process Historical Databases, Michael Carl Thomas
LSU Doctoral Dissertations
Modern chemical plants have distributed control systems (DCS) that handle normal operations and quality control. However, the DCS cannot compensate for fault events such as fouling or equipment failures. When faults occur, human operators must rapidly assess the situation, determine causes, and take corrective action, a challenging task further complicated by the sheer number of sensors. This information overload as well as measurement noise can hide information critical to diagnosing and fixing faults. Process monitoring algorithms can highlight key trends in data and detect faults faster, reducing or even preventing the damage that faults can cause. This research improves tools …
Effects Of Premature Birth And/Or Low Birthweight On Developmental Outcomes, Rachel L. Goldin
Effects Of Premature Birth And/Or Low Birthweight On Developmental Outcomes, Rachel L. Goldin
LSU Doctoral Dissertations
Advances in neonatal technology have improved survival rates of children born at lower and lower birthweight and after fewer and fewer weeks of gestation. However, these children are at increased risk of experiencing developmental delays. As weeks of gestation and birthweight decrease, the risk of developmental impairment and severity increases. Yet to be determined is whether premature birth and low birthweight (LBW) effect development differentially, and if the combined, have an additive effect on developmental outcomes. The first part of this study aimed to examine the independent effects of preterm birth and LBW in children at risk for developmental delays. …
What Do Teachers Know About Differentiated Instruction?, Sharmayne Raby Rutledge
What Do Teachers Know About Differentiated Instruction?, Sharmayne Raby Rutledge
LSU Doctoral Dissertations
The purpose of this case study was to explore what elementary teachers in an urban school district understand and implement as differentiated instruction and the role of learning styles. While there is much research that supports the implementation of differentiated instruction based on learning styles and learning levels to increase student achievement (Grasha, 2002; Patton, 1987), there is limited research that aligns the teacher’s understanding, implementation, and reflection on pedagogical differentiated practices within the classroom. As an employee of the study district, a former teacher within the district, and a former supervisor of the school, I defined my role as …
Excluding A Weakly 4-Connected Minor, Kimberly Sevin D'Souza
Excluding A Weakly 4-Connected Minor, Kimberly Sevin D'Souza
LSU Doctoral Dissertations
A 3-connected graph $G$ is called weakly 4-connected if min $(|E(G_1)|, |E(G_2)|) \leq 4$ holds for all 3-separations $(G_1,G_2)$ of $G$. A 3-connected graph $G$ is called quasi 4-connected if min $(|V(G_1)|, |V(G_2)|) \leq 4$. We first discuss how to decompose a 3-connected graph into quasi 4-connected components. We will establish a chain theorem which will allow us to easily generate the set of all quasi 4-connected graphs. Finally, we will apply these results to characterizing all graphs which do not contain the Pyramid as a minor, where the Pyramid is the weakly 4-connected graph obtained by performing a $\Delta …
Biomedical Applications Of Thiol-Acrylate Polymers, Leah Alyce Garber
Biomedical Applications Of Thiol-Acrylate Polymers, Leah Alyce Garber
LSU Doctoral Dissertations
The development of biocompatible polymers using thiol-acrylate Michael addition reactions between not only acrylates and thiols but also between amines and acrylates were demonstrated. The synthesis of an in situ tertiary amine catalyst initiates the propagation steps of the polymerization process by subsequently reacting with trimethylolpropane tris (3-mercaptopropionate) (TMPTMP). A few notable characteristics of this reaction are tunable gel times, the capability of reaching high polymer conversion and suitable mechanical strength. With addition of hydroxyapatite to the polymeric phase and foaming, a porous bone composite was produced. Further osteogenisis and in vivo work using the PETA-co-TMPTMP (HA) composite material was …
The Thomism Of Bartolomé De Las Casas And The Indians Of The New World, Thomas Francis Xavier Varacalli
The Thomism Of Bartolomé De Las Casas And The Indians Of The New World, Thomas Francis Xavier Varacalli
LSU Doctoral Dissertations
This dissertation examines Bartolomé de Las Casas as a Thomistic political philosopher. It argues that Las Casas intentionally drew upon the philosophy of Thomas Aquinas in order to provide a robust philosophical anthropology that was able to defend Amerindian rationality and self-rule. He uses Thomas and the Classical tradition to disprove the notion that the Amerindians are natural slaves, to uphold the inherent goodness of politics, to protect Amerindian kingdoms from imperial claims and the direct power of the papacy, and to condemn the unjust wars of the Spanish Conquest of the Americas. Las Casas’ Thomism is particularly important because …
Temporal Trends Of Intraurban Commuting In Baton Rouge 1990-2010, Yujie Hu
Temporal Trends Of Intraurban Commuting In Baton Rouge 1990-2010, Yujie Hu
LSU Doctoral Dissertations
Based on the CTPP data 1990-2010, this research analyzes the temporal variability of commuting patterns and efficiency (in both distance and time) in Baton Rouge, Louisiana. It proposes a simulation-based method to measure commuting by simulating individual resident workers, jobs, and trips between them, in order to mitigate the aggregation error and scale effect that are commonly encountered in existing studies. Specifically, the Monte Carlo simulation approach is adopted to simulate individual resident workers and jobs that were consistent with their spatial distributions across the areal unit (e.g., census tract), and then simulate individual trips that were proportional to the …
La Philosophie Poétique D'Édouard Glissant, Un Monisme Vitaliste, David Llorca
La Philosophie Poétique D'Édouard Glissant, Un Monisme Vitaliste, David Llorca
LSU Doctoral Dissertations
Édouard Glissant (1928-2011) is a world famous poet and novelist from French Island Martinique who, following the footsteps of Aimé Césaire, tried to heal the traumatic disruption and resolve the identity crisis of Creole people after the abominations of slavery and colonization by poetic sublimation and engaged thoughts. How is Glissant a philosopher? How does he articu-late poetry and philosophy together? What does he understand by “Relation”, why is it central in his thought and how does the articulation of all his concepts around it make a philosophical en-semble? How original and cohesive is this ensemble? Also, as we know …
Riemann-Hilbert Formalism In The Study Of Crack Propagation In Domains With A Boundary, Aleksandr Smirnov
Riemann-Hilbert Formalism In The Study Of Crack Propagation In Domains With A Boundary, Aleksandr Smirnov
LSU Doctoral Dissertations
The Wiener-Hopf technique is a powerful tool for constructing analytic solutions for a wide range of problems in physics and engineering. The key step in its application is solution of the Riemann-Hilbert problem, which consists of finding a piece-wise analytic (vector-) function in the complex plane for a specified behavior of its discontinuities. In this dissertation, the applied theory of vector Riemann-Hilbert problems is reviewed. The analytical solution representing the problem on a Riemann surface, and a numerical solution that reduces the problem to singular integral equations, are considered, as well as a combination of the numerical and analytical techniques …
Time-Lapse Polymerizations Triggered By Ph Clock Reactions, Elizabeth Jee
Time-Lapse Polymerizations Triggered By Ph Clock Reactions, Elizabeth Jee
LSU Doctoral Dissertations
The theme of this work is time-lapse polymerizations triggered by pH clock reactions. The first chapter is the introduction and gives a long overview of the different chemistries studied here. The second chapter focuses on the bromate-sulfite clock reaction. Based on some simplified and accepted reaction equations for the bromate-sulfite clock. We presumed it may be possible to increase the pH of the solution via ammonia addition and hinder or significantly reduce the reactivity of the clock reagents, thus creating a storage stable reaction. Adding a polymer system that would not crosslink until the solution became acidic would have created …
High-Resolution Correlation Using Geophysical And Geochemical Methods On Three Cambrian Drumian Marine Sedimentary Successions In The House Range Embayment, Western Laurentia, Emad I. Elfar
LSU Doctoral Dissertations
The Global boundary Stratotype Section and Point (GSSP) of the base of the Cambrian Drumian Stage was defined at 62 m above the base of the Wheeler formation, at the First Appearance Datum (FAD) of Ptychagnostus atavus (P. atavus), and at 10 meter below the DrumIan Carbon isotope Excursion (DICE) on the Stratotype Ridge in the Drum Mountains western Utah, (Babcock at al., 2004; 2007). Tracing the base of the the Drumian stage to other Middle Cambrian sequences in the House Range Embayment (HRE), a fault-controlled deep-water intrusion into an extensive carbonate platform along the passive margin of western Laurentia, …
Derived Geometric Satake Equivalence, Springer Correspondence, And Small Representations, Jacob Paul Matherne
Derived Geometric Satake Equivalence, Springer Correspondence, And Small Representations, Jacob Paul Matherne
LSU Doctoral Dissertations
It is known that the geometric Satake equivalence is intimately related to the Springer correspondence when restricting to small representations of the Langlands dual group (see a paper by Achar and Henderson and one by Achar, Henderson, and Riche). This dissertation relates the derived geometric Satake equivalence of Bezrukavnikov and Finkelberg and the derived Springer correspondence of Rider when we restrict to small representations of the Langlands dual group under consideration. The main theorem of the before-mentioned paper of Achar, Henderson, and Riche sits inside this derived relationship as its degree zero piece.
Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller
Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller
LSU Doctoral Dissertations
Sensor arrays have evolved as powerful approaches for providing detection and discrimination of volatile organic compounds (VOCs) as required across numerous analytical applications. Such systems typically comprise a number of cross reactive sensor elements, which generate analyte specific response patterns upon exposure to VOCs, and are known as multisensor arrays. When evaluated using statistical methods, these response patterns facilitate classification of VOCs. As an alternative, a single dynamically operated sensor could also be used to generate analyte specific response patterns. This approach is known as a virtual sensor array (VSA) and can exhibit significant advantages when compared to MSAs. Some …
Design And Validation Of A Prototype Collimation System With Reduced Applicator Weights For Elekta Electron Therapy Beams, Garrett Michael Pitcher
Design And Validation Of A Prototype Collimation System With Reduced Applicator Weights For Elekta Electron Therapy Beams, Garrett Michael Pitcher
LSU Doctoral Dissertations
The objective of this study was to design an electron collimation system for Elekta Infinity accelerators with significantly reduced applicator weights, while maintaining acceptable in-field beam flatness and out-of-field leakage dose. The design was restricted to 6-20 MeV beams for 6x6 to 25x25 cm2 applicators at 100 cm SSD with the MLCi2 treatment head. In Aim1, measured off-axis profiles showed that the current Elekta collimation system met dose flatness (4%) and IEC leakage dose specifications in the patient plane for custom 7, 13, and 20 MeV beams at MBPCC. Also, Monte Carlo (MC) calculations based on MBPCC beam models sufficiently …