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2014

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Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson Jan 2014

Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson

LSU Doctoral Dissertations

This research study addressed teachers’ perceptions of the use of social networking via mobile devices and the impact that social media accessed via mobile devices has on the learning engagement of students in grades 9-12 in select Louisiana high schools, in a rural southern parish of the United States (Gibbs, 2012). The study examined teachers’ perceptions of whether or not the use of social media improved students’ engagement in learning activities. Some researchers assert that the use of social media and smart cell phones is both the current and future mode of communication and that educators would do well to …

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Does Exploring Non-Linear Models Address High School Students' Misconceptions Of Linearity And Rate Of Change?, Kailyn Brabham Jan 2014

Does Exploring Non-Linear Models Address High School Students' Misconceptions Of Linearity And Rate Of Change?, Kailyn Brabham

LSU Master's Theses

Previous studies have shown that students at all levels—elementary, secondary and post-secondary—tend to apply linear reasoning in mathematical problems where non-linear models are needed. They rely on proportionality and linear equations without paying attention to the problem features needed for an accurate model. In the present study, students were taught using an activity-inspired by modeling curricula. In a hands-on activity, they explored the rate of change of linear and nonlinear functions that arise in describing elastic materials, recording average rates of change and noting key graphical features. This led them to articulate the relationship between nonlinear models, local linearity and …

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Coloring Graphs Drawn With Crossings, Daniel Allen Guillot Jan 2014

Coloring Graphs Drawn With Crossings, Daniel Allen Guillot

LSU Doctoral Dissertations

This dissertation will examine various results for graph colorings. It begins by introducing some basic graph theory concepts, focusing on those ideas relevant to graph embeddings, and by introducing terminology to allow a formal discussion of drawings of graphs. Chapter 2 focuses on results for proper colorings of graphs with good drawings, using a previous result from Král and Stacho as inspiration. Chapter 3 expands on the ideas of Chapter 2 and focuses on cyclic colorings of embedded graphs. Chapters 5 and 6 examine results for total and list colorings, respectively, of drawings of graphs. Finally, Chapter 6 introduces generalized …

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Efficient Dense 3d Reconstruction Using Image Pairs, Padmapriya Ravi Jan 2014

Efficient Dense 3d Reconstruction Using Image Pairs, Padmapriya Ravi

LSU Master's Theses

The 3D reconstruction of a scene from 2D images is an important topic in the _x000C_eld of Computer Vision due to the high demand in various applications such as gaming, animations, face recognition, parts inspections, etc. The accuracy of a 3D reconstruction is highly dependent on the accuracy of the correspondence matching between the images. For the purpose of high accuracy of 3D reconstruction system using just two images of the scene, it is important to _x000C_nd accurate correspondence between the image pairs. In this thesis, we implement an accurate 3D reconstruction system from two images of the scene at …

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Graphical Models In Characterizing The Dependency Relationship In Wireless Networks And Social Networks, Phuoc Doan Huu Vu Jan 2014

Graphical Models In Characterizing The Dependency Relationship In Wireless Networks And Social Networks, Phuoc Doan Huu Vu

LSU Master's Theses

Semi-Markov processes have become increasingly important in probability and statistical modeling, which have found applications in traffic analysis, reliability and maintenance, survival analysis, performance evaluation, biology, DNA analysis, risk processes, insurance and finance, earthquake modeling, etc. In the first part of this thesis, our focus is on applying semi-Markov processes to modeling the on-off duty cycles of different nodes in wireless networks. More specifically, we are interested in restoration of statistics of individual occupancy patterns of specific users based on wireless RF observation traces. In particular, we present a novel approach to finding the statistics of several operations, namely down-sampling, …

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The Confluence Of Structure And Dynamics In Lanthanide(Iii) Chelates: How Dynamics Help Define Structure In Solution, Benjamin Charles Webber, Mark Woods Jan 2014

The Confluence Of Structure And Dynamics In Lanthanide(Iii) Chelates: How Dynamics Help Define Structure In Solution, Benjamin Charles Webber, Mark Woods

Chemistry Faculty Publications and Presentations

Coordination exchange processes tend to dominate the solution state behaviour of lanthanide chelates and generally prohibit the study of small conformational changes. In this article we take advantage of coordinatively rigid Eu3+ chelates to examine the small conformational changes that occur in these chelates as water dissociatively exchanges in and out of the inner coordination sphere. The results show that the time-averaged conformation of the chelate alters as the water exchange rate increases. This conformational change reflects a change in the hydration state (q/rLnH6) of the chelate. The hydration state has recently come …

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A Feasibility Study Of Ultra-Short Echo Time Mri For Positive Contrast Visualization Of Prostate Brachytherapy Permanent Seed Implants For Post-Implant Dosimetry, Melissa Lamberto Jan 2014

A Feasibility Study Of Ultra-Short Echo Time Mri For Positive Contrast Visualization Of Prostate Brachytherapy Permanent Seed Implants For Post-Implant Dosimetry, Melissa Lamberto

LSU Master's Theses

Purpose: Ultra-short echo time (UTE) imaging is a magnetic resonance imaging (MRI) technique that uses very short echo times (on the order of microseconds) to measure rapid T2 relaxation. An application of UTE is the visualization of magnetic susceptibility-induced shortening of T2 in tissues adjacent to metal, such as prostate tissue with implanted brachytherapy seeds. This study assessed UTE imaging of prostate brachytherapy seeds on a clinical 3T MRI scanner to provide images for post-implant dosimetry. Methods: A prostate tissue phantom was made of gelatin mixed with Gd and other materials to mimic the prostate peripheral zone’s T1 and T2 …

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Assessment Of Habitat Quality For Red Snapper, Lutjanus Campechanus, In The Northwestern Gulf Of Mexico: Natural Vs. Artificial Reefs, Brittany Dawn Schwartzkopf Jan 2014

Assessment Of Habitat Quality For Red Snapper, Lutjanus Campechanus, In The Northwestern Gulf Of Mexico: Natural Vs. Artificial Reefs, Brittany Dawn Schwartzkopf

LSU Master's Theses

Habitat quality of natural and artificial reefs for red snapper (Lutjanus campechanus) in the northwestern Gulf of Mexico (Gulf) is important as this area is home to the majority of the Gulf’s artificial reef system, in the form of oil and gas platforms, in addition to the largest extent of high vertical relief natural habitat. This study sought to assess habitat quality of natural reefs of varying habitat complexity and an artificial reef complex located on the LA continental shelf. Habitat quality was assessed by comparing red snapper diets and foraging patterns, and nutritional condition using the liver-somatic index (LSI) …

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Removal Of Sustained Casing Pressure By Gravity Displacement Of Annular Fluid, Efecan Demirci Jan 2014

Removal Of Sustained Casing Pressure By Gravity Displacement Of Annular Fluid, Efecan Demirci

LSU Master's Theses

Sustained Casing Pressure (SCP) is the undesirable casing head pressure of a well annulus that rebuilds when bled-down. As the conventional methods for SCP removal using rigs are expensive, there is a need for improvement. Annular intervention for replacing the fluid above the leaking cement with a heavier fluid to stop gas migration is a solution for SCP removal; however, previous attempts failed due to miscibility of injected fluids. Using hydrophobic heavy fluids for the purpose is a newly proposed technique to the technology. Potential of theoretically selected and produced immiscible heavy fluids are investigated in characterized annular fluids. A …

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Performance Improvement Of Distributed Computing Framework And Scientific Big Data Analysis, Praveenkumar Kondikoppa Jan 2014

Performance Improvement Of Distributed Computing Framework And Scientific Big Data Analysis, Praveenkumar Kondikoppa

LSU Doctoral Dissertations

Analysis of Big data to gain better insights has been the focus of researchers in the recent past. Traditional desktop computers or database management systems may not be suitable for efficient and timely analysis, due to the requirement of massive parallel processing. Distributed computing frameworks are being explored as a viable solution. For example, Google proposed MapReduce, which is becoming a de facto computing architecture for Big data solutions. However, scheduling in MapReduce is coarse grained and remains as a challenge for improvement. Related with MapReduce scheduler when configured over distributed clusters, we identify two issues: data locality disruption and …

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Search-Based Model-Driven Loop Optimizations For Tensor Contractions, Ajay Panyala Jan 2014

Search-Based Model-Driven Loop Optimizations For Tensor Contractions, Ajay Panyala

LSU Doctoral Dissertations

Complex tensor contraction expressions arise in accurate electronic structure models in quantum chemistry, such as the coupled cluster method. The Tensor Contraction Engine (TCE) is a high-level program synthesis system that facilitates the generation of high-performance parallel programs from tensor contraction equations. We are developing a new software infrastructure for the TCE that is designed to allow experimentation with optimization algorithms for modern computing platforms, including for heterogeneous architectures employing general-purpose graphics processing units (GPGPUs). In this dissertation, we present improvements and extensions to the loop fusion optimization algorithm, which can be used with cost models, e.g., for minimizing memory …

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The Hard Decisions: A Qualitative Study Of Marital Reconciliation, Hannah Pearce Plauche Jan 2014

The Hard Decisions: A Qualitative Study Of Marital Reconciliation, Hannah Pearce Plauche

LSU Doctoral Dissertations

The topics of marriage and divorce have been studied extensively, especially in recent decades; however, the topic of marital reconciliation has been scarcely researched. Seven couples (N = 14) participated in a qualitative investigation of marital reconciliation. Each couple had filed a petition for divorce in the state of Louisiana between the years 2000-2010. Before the required 12 month period of living apart were complete, each couple decided to discontinue the divorce proceedings and reconcile their marriages, and have lived together continuously for a period of more than three years. A purposive, convenience sample was solicited due to the specific …

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Interactions Of Herbicide Mixtures In Imidazolinone-Resistant Rice, John Caleb Fish Jan 2014

Interactions Of Herbicide Mixtures In Imidazolinone-Resistant Rice, John Caleb Fish

LSU Master's Theses

Propanil has long been a staple of weed management in rice production. The introduction of IR rice allowed for the use of imidazolinone herbicides in crop for the control of red rice. Six studies were conducted in 2011 and 2012 to evaluate the weed control interactions, synergistic, antagonistic, or additive, of imazethapyr or imazamox when mixed in a single application with propanil, thiobencarb, or a pre-packaged mixture of propanil plus thiobencarb. Blouin’s modified Colby’s was used to determine if a synergistic, antagonistic, or additive response occurred. Two studies were established to evaluate imazethapyr at 0 and 70 g ha-1, or …

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Performance Comparison Between Patus And Pluto Compilers On Stencils, Pratik Prabhu Hanagodimath Jan 2014

Performance Comparison Between Patus And Pluto Compilers On Stencils, Pratik Prabhu Hanagodimath

LSU Master's Theses

Comparing the performances of Patus and Pluto compilers on stencil applications. Stencils are written in Jacobi and Seidel style of coding and performances of both these compilers are analysed based on these coding styles.

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Photocatalytic Hydrogen Production From A Noble Metal Free System Based On A Water Soluble Porphyrin Derivative And A Cobaloxime Catalyst, Theodore Lazarides, Milan Delor, Igor V. Sazanovich, Theresa M. Mccormick, Irene Georgakaki, Georgios Charalambidis, Julia A. Weinstein, Athanassios G. Coutsolelos Jan 2014

Photocatalytic Hydrogen Production From A Noble Metal Free System Based On A Water Soluble Porphyrin Derivative And A Cobaloxime Catalyst, Theodore Lazarides, Milan Delor, Igor V. Sazanovich, Theresa M. Mccormick, Irene Georgakaki, Georgios Charalambidis, Julia A. Weinstein, Athanassios G. Coutsolelos

Chemistry Faculty Publications and Presentations

A combination of noble-metal free components, a water soluble porphyrin photosensitizer zincmeso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride [ZnTMPyP4+]Cl4 (1) with cobaloxime complex [CoIII(dmgH)2(py)Cl] (2) as a catalyst, creates an efficient system for photochemical hydrogen production acting under visible light with 280 TONs. This is the first example of a water soluble porphyrin acting as a photosensitizer for cobaloxime catalysed H2 production.

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Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi Jan 2014

Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi

LSU Doctoral Dissertations

The numerical model FVCOM (Finite Volume Community Ocean Model) was applied to study the effects of Hurricane Katrina on the vertical mixing over the Louisiana shelf and the process of post-storm re-stratification. Wind field from Hurricane Katrina was generated using a single vortex analytical model and was evaluated using available wind measurements over the shelf. Simulations of shelf circulation under Hurricane Katrina were done through several numerical tests to find the best approach for treating vertical eddy viscosity. Model results for the shelf during Katrina demonstrated opposite currents between surface and bottom for most of the shelf area. Results also …

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Education Ain't Black: The Disidentification Of African American Students, Erica Lynette James Jan 2014

Education Ain't Black: The Disidentification Of African American Students, Erica Lynette James

LSU Master's Theses

In this thesis, I will discuss the influence of education on the identity formation of African American students. Based on the scholarly literature in education theory, I will argue in Bourdieuan theory education, formal education, fails to accommodate the specific needs of African American students because education influences African American students to develop constructions of “whiteness" that education reinforces. As education attempts to uphold the “status quo” of American society, education simultaneously forces African American students to question the relevance of education. In questioning the relevance of education through high-achieving African American students’ use of language and pursuit of academic …

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Gumbos- And Ionic Liquid-Coated Quartz Crystal Microbalance Sensors For Detection And Molecular Weight Determination Of Organic Vapors, Bishnu Prasad Regmi Jan 2014

Gumbos- And Ionic Liquid-Coated Quartz Crystal Microbalance Sensors For Detection And Molecular Weight Determination Of Organic Vapors, Bishnu Prasad Regmi

LSU Doctoral Dissertations

There has been an ever-increasing demand for the development of high-performance sensing devices for detection and discrimination of volatile organic compounds (VOCs) present in different environments. Among a number of sensing devices currently available, sorption-based sensors are particularly attractive because they are simple and inexpensive, require low power, and are appropriate for fabrication of multisensor arrays. A sorption-based sensor is comprised of a chemically active coating immobilized on the surface of a physical transducer. The chemically active film interacts with analytes, and the transducer converts the binding event into an electrical signal. This dissertation is focused on a sorption-based sensor …

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Expression Of O-Linked N-Acetylglucosamine Modified Proteins And Production And Characterization Of Chlamydia Trachomatis Ct663, Octavia Y. Goodwin Jan 2014

Expression Of O-Linked N-Acetylglucosamine Modified Proteins And Production And Characterization Of Chlamydia Trachomatis Ct663, Octavia Y. Goodwin

LSU Doctoral Dissertations

O-linked â-N-acetylglucosamine is a regulatory post translational modification. This modification occurs on nearly all functional classes of proteins, in the nucleus and cytoplasm. O-GlcNAc is added to serine or threonine by O-GlcNAc transferase and removed by O-GlcNAcase. Previous attempts to study O-GlcNAc-modified proteins have resulted in low yields, making 3-dimensional structure determination impossible. In this dissertation O-GlcNAc transferase will be co-expressed with domains of human cAMP responsive element-binding protein (CREB1) and Abelson tyrosine-kinase 2 (ABL2) in E. coli, to produce O-GlcNAc-modified protein. The O-GlcNAc-modified protein was expressed in a variety of E. coli cell lines at a variety of conditions, …

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The Effects Of A Test-Taking Skills Intervention On Test Anxiety And Test Performance In 4th Graders, Meredith T. Harris Jan 2014

The Effects Of A Test-Taking Skills Intervention On Test Anxiety And Test Performance In 4th Graders, Meredith T. Harris

LSU Master's Theses

Increases in standardized testing have been accompanied by increased reports of test anxiety in younger students. School-based test anxiety interventions can be implemented to decrease test anxiety and improve test performance. Skill-based interventions have effectively addressed both of these variables; however, the research has primarily targeted secondary and university students. The purpose of the current study was to determine if a test-taking skills intervention would decrease test anxiety and improve test performance in 4th grade students. Results indicated that the test-taking skills intervention resulted only in a minor decrease in test anxiety that maintained at 1-month follow-up. Effects on test …

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Comparison Of Land Building By Mississippi River Diversion Using One And Two Dimensional Numerical Models, Gyan Prasad Basyal Jan 2014

Comparison Of Land Building By Mississippi River Diversion Using One And Two Dimensional Numerical Models, Gyan Prasad Basyal

LSU Master's Theses

River sediment diversions have been identified as one strategy for creating new land and offsetting Mississippi River delta plain land loss. Numerical modeling is one tool for estimating the amount of land, geomorphic features and ecological benefits from diversions. There are a number of models proposed to estimate sediment diversion land building, ranging from simplistic approaches that provide bulk characteristics and use little computational resources to process-based models that require a large amount of input parameters and computing power. This thesis aims to compare and contrast two approaches to simulating the land building processes in a simplified receiving basin: a …

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Screening Ted: A Rhetorical Analysis Of The Intersections Of Rhetoric, Digital Media, And Pedagogy, Joseph Alan Watson Jan 2014

Screening Ted: A Rhetorical Analysis Of The Intersections Of Rhetoric, Digital Media, And Pedagogy, Joseph Alan Watson

LSU Doctoral Dissertations

The presence of expertise resonates across our daily lives. Experts are called upon to consult us about which candidate is ideal for office, which type of wood is the best choice for a carpentry project, which scientist has optimal data on the effects of air pollution, which speech teacher is the best one to take for proper credit hours, and more. An expert is typically conceived as an individual who knows more about a given topic and can create stronger identification than an average person. The struggle to achieve expert status is one that is fundamentally tied to power and …

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Vocabulary Matching : Potential For A Diagnostic Performance Indicator, Jodie Schraven Jan 2014

Vocabulary Matching : Potential For A Diagnostic Performance Indicator, Jodie Schraven

LSU Doctoral Dissertations

Predictive validity was explored between vocabulary matching (VM) probe scores and the integrated Louisiana Education Assessment Program (iLEAP) social studies standardized subtest score for 224 sixth-grade students across demographic categories from one rural southeastern Louisiana school district. Multiple Linear Regression (MLR) conducted in the Statistical Package for the Social Sciences (SPSS, 2007) produced Pearson correlations between .51 and .70 for five benchmark probes for the entire sample. Predictive cutscores created using Receiver Operating Characteristic (ROC) curve analyses and a diagnostic accuracy application software program illustrated that VM cutscores did not correctly predict which students would pass or fail with enough …

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Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas Jan 2014

Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas

LSU Doctoral Dissertations

In this dissertation we consider the problem of localization of wireless devices in environments and applications where GPS (Global Positioning System) is not a viable option. The _x000C_rst part of the dissertation studies a novel positioning system based on narrowband radio frequency (RF) signals of opportunity, and develops near optimum estimation algorithms for localization of a mobile receiver. It is assumed that a reference receiver (RR) with known position is available to aid with the positioning of the mobile receiver (MR). The new positioning system is reminiscent of GPS and involves two similar estimation problems. The _x000C_rst is localization using …

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Determination Of Predominant Species Of Oil-Degrading Bacteria In The Oiled Sediment In Barataria Bay, Louisiana, Lauren Nicole Navarre Jan 2014

Determination Of Predominant Species Of Oil-Degrading Bacteria In The Oiled Sediment In Barataria Bay, Louisiana, Lauren Nicole Navarre

LSU Master's Theses

The effects of the Deepwater Horizon (DWH) oil spill on the bacterial communities in coastal sediments are relatively known but few studies have been published evaluating the impacts of the spill on oil-degrading bacterial populations in the salt marsh sediments of Barataria Bay, Louisiana. The aims of this study were to determine the effects of the oil spill on the microbial community in Barataria Bay, Louisiana through the determination of predominate species of oil-degrading bacteria in marsh sediments, and to determine how well certain bacterial isolates can degrade crude oil in the region by taking samples from three areas of …

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Quantum Optical Metrology, Sensing And Imaging, Kebei Jiang Jan 2014

Quantum Optical Metrology, Sensing And Imaging, Kebei Jiang

LSU Doctoral Dissertations

In this dissertation we begin with a brief introduction to quantum optics concentrating on the topics of the noise of quantum optical states, quantum estimation theory, quantum interferometry and the atom-field interaction. This background is necessary for understanding the discussions in later chapters. In particular, quantum interferometry, which is optical interferometry when the light source is a quantum mechanical state, plays a central role in this dissertation. In Chapter 2 we discuss the phase estimation sensitivity of quantum metrology when photon loss is present. In Chapter 3 we extend the discussion to include the phase fluctuation of the system caused …

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Combinatorial Minimal Free Resolutions Of Ideals With Monomial And Binomial Generators, Trevor Mcguire Jan 2014

Combinatorial Minimal Free Resolutions Of Ideals With Monomial And Binomial Generators, Trevor Mcguire

LSU Doctoral Dissertations

In recent years, the combinatorial properties of monomials ideals and binomial ideals have been widely studied. In particular, combinatorial interpretations of minimal free resolutions have been given in both cases. In this present work, we will generalize existing techniques to obtain two new results. If Lambda is an integer lattice in the n-dimensional integers satisfying some mild conditions, S is the polynomial ring with n variables and R is the group algebra of S[Lambda], then the first result is resolutions of Lambda-invariant submodules of the Laurent polynomial ring in n variables as R-modules. A consequence will be the ability to …

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Prevalence Of Blue Crab (Callinectes Sapidus) Diseases, Parasites, And Symbionts In Louisiana, Holly Rogers Jan 2014

Prevalence Of Blue Crab (Callinectes Sapidus) Diseases, Parasites, And Symbionts In Louisiana, Holly Rogers

LSU Master's Theses

Research on blue crab diseases, parasites, and symbionts has been sporadic in the Gulf of Mexico. Understanding the prevalence of diseases, parasites, and symbionts is important for managers to set informed regulations for the commercial industry and to understand the impacts of environmental disasters on aquatic animal health. The objective of this research was to determine the prevalence of Lagenophrys callinectes, Urosporidium crescens, Hematodinium perezi, Loxothylacus texanus, reo-like virus (RLV), shell rot, and Vibrio spp. in crabs collected from four coastal locations and four shedding facilities in 2013 and the beginning of 2014. Additionally, I determined the prevalence of white …

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Evaluation Of Different Harvesting And Storage Practices: Sweet Sorghum And Energycane, Ana Lucia Amaya Arroyave Jan 2014

Evaluation Of Different Harvesting And Storage Practices: Sweet Sorghum And Energycane, Ana Lucia Amaya Arroyave

LSU Master's Theses

Two attractive potential feed stocks for biofuel production are energycane and sweet sorghum due to the environmental adaptability, sugars concentration and yield. Evaluation and development of harvesting, transportation and storage practices is critical for bringing the production of these crops to industrial levels. This research aims to analyze the supply system of energy crops and evaluate the effect of different harvesting and storage in the yields of the feedstock and the efficiencies of the processes. Harvesting trials were conducted at St. Gabriel, LA for evaluating the feasibility of using energy crops as inputs for ethanol production. The parameters that were …

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Investigation Of Dimensionality-Dependent Foam Rheological Properties By Using Mechanistic Foam Model, Woochan Lee Jan 2014

Investigation Of Dimensionality-Dependent Foam Rheological Properties By Using Mechanistic Foam Model, Woochan Lee

LSU Master's Theses

A numerous laboratory and field tests revealed that foam can effectively control gas mobility, improve sweep efficiency, and increase oil production, if correctly designed. It is believed that there is a significant gap between small laboratory-scale experiments and large field-scale tests because of two main reasons: (i) typical laboratory flow tests are conducted in linear systems, while field-scale foam EOR processes are performed in radial (or spherical partly) systems in general; and (ii) through the complicated in-situ lamella creation and coalescence mechanisms and non-Newtonian behavior, foam rheology is thought to depend on geometry and dimensionality and, as a result, it …

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