Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (1402)
- Chemistry (456)
- Engineering (435)
- Education (195)
- Applied Mathematics (188)
-
- Social and Behavioral Sciences (146)
- Computer Sciences (145)
- Oceanography and Atmospheric Sciences and Meteorology (135)
- Environmental Sciences (115)
- Physics (112)
- Earth Sciences (109)
- Civil and Environmental Engineering (108)
- Chemical Engineering (105)
- Arts and Humanities (94)
- Life Sciences (86)
- Electrical and Computer Engineering (83)
- Mathematics (75)
- Mechanical Engineering (67)
- Business (61)
- Music (58)
- Psychology (57)
- Engineering Science and Materials (48)
- Petroleum Engineering (46)
- Human Resources Management (44)
- Analytical Chemistry (38)
- Curriculum and Instruction (37)
- Quantum Physics (36)
- Physical Chemistry (34)
- Organic Chemistry (31)
- Astrophysics and Astronomy (29)
- Keyword
-
- Louisiana (25)
- Machine learning (25)
- Optimization (22)
- Microfluidics (21)
- Nanoparticles (21)
-
- Synthesis (20)
- Molecular dynamics (17)
- Gulf of Mexico (14)
- Machine Learning (14)
- Modeling (14)
- Gravitational waves (13)
- Mass spectrometry (13)
- Simulation (13)
- GUMBOS (12)
- LIGO (12)
- Quantum (12)
- Retention (12)
- Catalysis (11)
- Fluorescence (11)
- Knot theory (11)
- Optics (11)
- Spectroscopy (11)
- Wetlands (11)
- Atomic force microscopy (10)
- Capillary electrophoresis (10)
- Hurricane (10)
- Intermetallics (10)
- NMR (10)
- Remote sensing (10)
- Cancer (9)
Articles 961 - 990 of 2330
Full-Text Articles in Entire DC Network
Seismic Velocity Characteristics Of Partially Saturated Unconsolidated Sediments, Jie Shen
Seismic Velocity Characteristics Of Partially Saturated Unconsolidated Sediments, Jie Shen
LSU Doctoral Dissertations
Seismic velocity models of the near-surface (< 30 m) better explain seismic velocities when all elements of total effective stress are considered, particularly in materials with large cohesive and soil suction stress such as clays. Traditional constitutive elastic models assume interparticle and soil suction stresses are negligible. This study proposes a new methodology which corrects total effective stress in Hertz-Mindlin theory for interparticle and soil suction and calculates the elastic moduli by extending Biot-Gassmann theory to include pressure effects induced by water saturation changes and cohesion. The proposed model predicts seismic velocities that correlate well with measured field velocities from the literature. Soil density, porosity, elastic moduli and the soil-water characteristic curve (SWCC) are important properties for soil characterization. Currently, geotechnical and laboratory tests for soil properties are costly and limited to point sampling sites. Seismic surveys can potentially provide laterally continuous soil property values that may complement geotechnical borehole tests with low cost. We propose a new method to invert for soil properties and the SWCC from seismic P- and S-wave velocity-vs.-depth profiles interpreted from shallow (< 25 m depth) unconsolidated sediments under conditions of near-full saturation (> 99%). The results from seismic soil property inversion are validated by comparison to geotechnical and laboratory results conducted independently in the same area as the seismic survey. Knowledge of homogeneous and heterogeneous fluid-distribution patterns is important for the estimation of oil reserves, reservoir simulation, the interpretation of time-lapse seismic, and the selection of remediation techniques for groundwater contamination. Problems exist in determining in-situ fluid-distribution patterns in unconsolidated sediments because laboratory tests on core samples may not be representative of in-situ conditions. We propose a new method to determine in-situ fluid-distribution patterns by inverting …
Game Theoretic Analyses Of The United States-Canada Softwood Lumber Trade, Rajan Parajuli
Game Theoretic Analyses Of The United States-Canada Softwood Lumber Trade, Rajan Parajuli
LSU Doctoral Dissertations
The ongoing softwood lumber trade dispute between the United States (U.S.) and Canada is one of the most contentious and largest bilateral trade battles over the recent decades. The bilateral trade debate is mostly because of the different forestland ownership systems in the U.S. and Canada, and the alleged timber subsidies by provincial governments to Canadian lumber producers. The Softwood Lumber Agreement (SLA) 2006 between the U.S. and Canada is the latest transitory solution of this dispute, entailing Canada to impose mandatory export charges on its lumber shipments to the U.S. In order to understand this trade dispute from a …
Development Of Transition Metal-Catalyzed Polymerization Reactions And Their Applications For The Preparation Of Well-Defined Conjugated Polymer Architectures, Carlos Anthony Chavez
Development Of Transition Metal-Catalyzed Polymerization Reactions And Their Applications For The Preparation Of Well-Defined Conjugated Polymer Architectures, Carlos Anthony Chavez
LSU Doctoral Dissertations
The synthesis of conjugated polymers and design of complex materials based on them have become increasingly popular as the demand for low-cost efficient and processible optoelectronic and semiconducting devices escalates. While advanced applications of polymeric materials require some degree of sophistication, success can be achieved through careful consideration of polymerization techniques and methodologies. Controlling critical aspects of the polymerization process allows for synthesis of complex macromolecular architectures possessing unique and novel properties that may be worth of further comprehensive investigation. This dissertation primarily focuses on the development and preparation of well-defined hierarchical macromolecular architectures. The foundation of this work encompasses …
Laboratory Experimental Demonstration Of The Effect Of Oceanic Whitecaps In The Transport Of Oil And Dispersant Components To The Atmosphere, Paria Avij
LSU Doctoral Dissertations
During the DWH oil spill, vast quantities of crude oil were released into the sea-surface environment of the Gulf of Mexico. There has been ample research focused on the transport of oil into the different environmental sections. Evaporation has been considered to be the only transport pathway of oil spill matter into the atmosphere. However, the aerosolization of oil and dispersant via bursting bubbles as they occur in whitecaps and breaking waves has not been considered in the oil and dispersant budget calculation. This transport vector is significant as it is the dominant source of particulate matter production in the …
Well-Quasi-Ordering By The Induced-Minor Relation, Chanun Lewchalermvongs
Well-Quasi-Ordering By The Induced-Minor Relation, Chanun Lewchalermvongs
LSU Doctoral Dissertations
Robertson and Seymour proved Wagner's Conjecture, which says that finite graphs are well-quasi-ordered by the minor relation. Their work motivates the question as to whether any class of graphs is well-quasi-ordered by other containment relations. This dissertation is concerned with a special graph containment relation, the induced-minor relation. This dissertation begins with a brief introduction to various graph containment relations and their connections with well-quasi-ordering. In the first chapter, we discuss the results about well-quasi-ordering by graph containment relations and the main problems of this dissertation. The graph theory terminology and preliminary results that will be used are presented in …
A New Method In Distribution Theory With A Non-Smooth Framework, Yunyun Yang
A New Method In Distribution Theory With A Non-Smooth Framework, Yunyun Yang
LSU Doctoral Dissertations
In this work, we present a complete treatment of the theory of thick distributions and its asymptotic expansion. We also present several applications of thick distributions in mathematical physics, function spaces, and measure theory. We also discuss regularization using different surfaces. In the last chapter we present some recent applications of distributions in clarifying the moment terms in the heat kernel expansion, and in explaining the relation between the heat kernel expansion and the cylinder kernel expansion.
Synthesis With Hypergraphs, Christopher Thomas Alvin
Synthesis With Hypergraphs, Christopher Thomas Alvin
LSU Doctoral Dissertations
Many problems related to synthesis with intelligent tutoring may be phrased as program synthesis problems using AI-style search and formal reasoning techniques. The _x000C_first two results in this dissertation focus on problem synthesis as an aspect of intelligent tutoring systems applied to STEM-based education frameworks, specifically high school geometry. Given a geometric _x000C_figure as input, our technique constructs a hypergraph representing logical deduction of facts, and then traverses the hypergraph to synthesize problems and their corresponding solutions. Using similar techniques, our third result is focused on exhaustive synthesis of molecules. This synthesis process involves bonding sets of basic, molecular `fragments' …
Real-Time Shadows For Gigapixel Displacement Maps, Kevin Anthony Cherry
Real-Time Shadows For Gigapixel Displacement Maps, Kevin Anthony Cherry
LSU Doctoral Dissertations
Shadows portray helpful information in scenes. From a scientific visualization standpoint, they help to add data without unnecessary clutter. In video games they add realism and depth. In common graphics pipelines, due to the independent and parallel rendering of geometric primitives, shadows are difficult to achieve. Objects require knowledge of each other and therefore multiple renders are needed to collect the necessary data. The collection of this data comes with its own set of trade offs. Our research involves adding shadows into a lunar rendering framework developed by Dr. Robert Kooima. The NASA-collected data contains a multi-gigapixel displacement map describing …
A Spatial Analysis Of Obesity And Its Associations With The Built And Natural Environment, Physical Inactivity, And Socioeconomic And Demographic Conditions In The United States Of America, Mustafa Erdem
LSU Doctoral Dissertations
Obesity has strong genetic determinants but the genetic composition of the population does not change rapidly. Thus in this study, the major changes in non-genetic factors such as the development of obesogenic environments and shifting socioeconomic status and lifestyle of individuals are hypothesized to increase the risk of obesity. As the prevalence of obesity continue to increase worldwide with substantial attention in the US, a clearer understanding of how spatial associations between obesity and confounding factors are interrelated is crucial to better tackle the issue of obesity. This study employs the ‘global’ and ‘local’ Exploratory Spatial Data Analysis (ESDA) methods …
Study Of Active Vibration Control Using The Method Of Receptances, Amit Maha
Study Of Active Vibration Control Using The Method Of Receptances, Amit Maha
LSU Doctoral Dissertations
Using the Method of Receptance, it is possible in general to assign 2_x0002_ poles (i.e. n conjugate pairs) of an axially vibrating rod of variable cross section by sensing the state at _x0002_ points along the rod. Using the sensor data, closed loop feedback control gains can be calculated by solving a simple set of linear equations. The feedback gains can be applied to generate the required control force using an actuator. This partial pole assignment can be done without continuous or discrete analytical modeling. Therefore, the physical parameters such as the rigidity, the density, and the variable cross-sectional area …
Seavipers - Computer Vision And Inertial Position Reference Sensor System (Cviprss), Justin Lee Erdman
Seavipers - Computer Vision And Inertial Position Reference Sensor System (Cviprss), Justin Lee Erdman
LSU Doctoral Dissertations
This work describes the design and development of an optical, Computer Vision (CV) based sensor for use as a Position Reference System (PRS) in Dynamic Positioning (DP). Using a combination of robotics and CV techniques, the sensor provides range and heading information to a selected reference object. The proposed optical system is superior to existing ones because it does not depend upon special reflectors nor does it require a lengthy set-up time. This system, the Computer Vision and Inertial Position Reference Sensor System (CVIPRSS, pronounced \nickname), combines a laser rangefinder, infrared camera, and a pan--tilt unit with the robust TLD …
A Monte Carlo Approach To Studying The Hydrogen Storage Capabilities Of Potassium Magnesium Hydride (Kmgh3), Brandon L. Borill
A Monte Carlo Approach To Studying The Hydrogen Storage Capabilities Of Potassium Magnesium Hydride (Kmgh3), Brandon L. Borill
LSU Doctoral Dissertations
Grand Canonical Monte Carlo (GCMC) simulations and the weighted histogram analysis method (WHAM) were employed at selected temperatures and pressures in the study of the hydrogen storage capabilities of KMgH3. A specially tailored addition/removal algorithm was employed to add hydrogen directly at the lattice sites. Agreement between experimental results was obtained through GCMC simulations. WHAM type studies were employed to obtain probability distributions for the purpose of learning the probability of finding hydrogen atoms at specific temperatures and hydrogen pressures. The radial distribution function was employed to study the changes in the structure of KMgH3 for the selected model as …
A Model Of The Tonal-Chromatic System And Its Application To Selected Works Of Gustav Mahler, Andrew David Nicolette
A Model Of The Tonal-Chromatic System And Its Application To Selected Works Of Gustav Mahler, Andrew David Nicolette
LSU Doctoral Dissertations
During the latter half of the twentieth century there was a marked shift in the way that many scholars approached analysis of late-nineteenth-century tonality. This shift in approach was motivated by the behavior and interaction of harmonic and melodic entities encountered in the music of the great composers of the nineteenth century, such as Schubert, Schumann, Brahms, Mahler, Wagner, and Strauss. The question arose: did the diatonic system remain at the heart of tonality during the late nineteenth century, or—as some propose—did a new chromatic-based tonality emerge? The acceptance of this new chromatic-based tonality is at the heart of this …
Visual Representations Of Gender In Engineering Trade Journals Of Professional Societies During 1998-2012: A Content Analysis Of Hierarchy And Stereotypes, Tracy Ettel Morris
Visual Representations Of Gender In Engineering Trade Journals Of Professional Societies During 1998-2012: A Content Analysis Of Hierarchy And Stereotypes, Tracy Ettel Morris
LSU Doctoral Dissertations
Recruiting and retaining women in engineering have stagnated since the mid-1990's partially due to the marginalization of women in education and the workforce. This research analyzed the quality and quantity of representation of women and men in visual images of professional science and engineering trade journals to illuminate the marginalizing climate of engineering. A mixed methods approach using visual content analysis was performed for a 15-year period during 1998-2012 of three different trade journals of professional societies representing various disciplines of engineering: the first has a low percentage of women, the second has a higher percentage of women, and the …
Synthetic Methods Development Towards The Total Synthesis Of Chlorosulfolipids, Andres Villalpando
Synthetic Methods Development Towards The Total Synthesis Of Chlorosulfolipids, Andres Villalpando
LSU Doctoral Dissertations
The focus of this dissertation is the development of a novel chlorination reaction utilizing a triphosgene-amine based mixture towards the total synthesis of chlorosulfolipids, a subclass of naturally occurring organohalogen natural products. This novel, mild chlorination reaction will be utilized under a global chlorination strategy to chlorinate multiple alcohol substituents in one synthetic operation. Chapter one details the history of chlorosulfolipids from the early stages of their isolation, relevant structural elucidation techniques, appropriate biosynthetic discoveries, and their biological relevance to a thorough investigation of the total syntheses completed to date. These compounds demonstrate a range of biological activities and have …
Synergistic Properties-Driven Synthesis Of Aluminides, Antiomonides, And Bioceramics, Pilanda Watkins-Curry
Synergistic Properties-Driven Synthesis Of Aluminides, Antiomonides, And Bioceramics, Pilanda Watkins-Curry
LSU Doctoral Dissertations
The synthesis, characterization, and properties of selected intermetallics and ceramic materials are presented in this dissertation. In our quest to grow single crystal intermetallics from the metal flux technique, new strategies were employed to avoid thermodynamically stable phases and to ensure sample homogeneity of the crystalline product for structure elucidation and accurate measurements of their magnetic and electrical properties. The relationship between the complex crystal structures and magnetic properties are reported for LnCo2Al8 (Ln = La-Nd, Sm, Yb), CeCo2-xMnxAl8 (0 < x < 1), and Pr2Fe4-xCoxSb5 (1 ≤ x < 3). The discovery of magnetic frustration in LnCo2Al8 (Ln = Ce, Nd) and complex magnetic ordering coupled with large positive magnetoresistance of up to 150% and 60% at 200 K with relatively low field of H = 1 T in Pr2Fe4-xCoxSb5 (x ≈ 2 and 2.5) is also reported. The demand of new inorganic solid materials as scaffolds for the engineering of bone tissue has led to the synthesis of calcium magnesium silicates such as, diopside (CaMgSi2O6), akermanite (Ca2MgSi2O7), monticellite (CaMgSiO4), and merwinite (Ca3Mg(SiO4)2)) for studying dimensionality and mechanical properties. This dissertation highlights the synergism of solid state chemistry at the interface of condensed matter physics and biological engineering. The discovery of compounds with tunable magnetic, electrical, and mechanical properties will be described herein.
A Trust-Based Relay Selection Approach To The Multi-Hop Network Formation Problem In Cognitive Radio Networks, Brandy Michelle Tyson
A Trust-Based Relay Selection Approach To The Multi-Hop Network Formation Problem In Cognitive Radio Networks, Brandy Michelle Tyson
LSU Doctoral Dissertations
One of the major challenges for today’s wireless communications is to meet the growing demand for supporting an increasing diversity of wireless applications with limited spectrum resource. In cooperative communications and networking, users share resources and collaborate in a distributed approach, similar to entities of active social groups in self organizational communities. Users’ information may be shared by the user and also by the cooperative users, in distributed transmission. Cooperative communications and networking is a fairly new communication paradigm that promises significant capacity and multiplexing gain increase in wireless networks. This research will provide a cooperative relay selection framework that …
Knots, Skein Theory And Q-Series, Mustafa Hajij
Knots, Skein Theory And Q-Series, Mustafa Hajij
LSU Doctoral Dissertations
The tail of a sequence {P_n(q)} of formal power series in Z[q^{-1}][[q]], if it exists, is the formal power series whose first $n$ coefficients agree up to a common sign with the first n coefficients of P_n. The colored Jones polynomial is link invariant that associates to every link in S^3 a sequence of Laurent polynomials. In the first part of this work we study the tail of the unreduced colored Jones polynomial of alternating links using the colored Kauffman skein relation. This gives a natural extension of a result by Kauffman, Murasugi, and Thistlethwaite regarding the highest and lowest …
Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet
Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet
LSU Doctoral Dissertations
The PFKFB enzymes control the primary checkpoint in the glycolytic pathway and are implicated in a multitude of diseases: from cancer, to schizophrenia, to diabetes, and heart disease. The inducible isoform, PFKFB3, is known to be associated with the upregulation of glycolysis in many cancers. The first study within this work investigates the potential for using tier-based approaches of virtual screening to target small molecule kinases, with PFKFB3 serving as a case study. For this investigation, bioactive compounds for PFKFB3 were identified from a compound library of 1364 compounds via high-throughput screening, with bioactive compounds being further characterized as either …
Modeling Two-Phase Flow And Heat Transfer In Polygonal Microchannels, Sai Sashankh Rao
Modeling Two-Phase Flow And Heat Transfer In Polygonal Microchannels, Sai Sashankh Rao
LSU Doctoral Dissertations
Microfluidics is a burgeoning research area with applications ranging from microfluidic cooling to biomolecule synthesis. Here we study two problems to gain an improved understanding of two-phase flow and heat transfer in microfluidic devices. We also study a third problem on boundary layer flow out of theoretical interest. In the first problem, we study the heat and mass transfer in polygonal micro heat pipes under small imposed temperature differences. A micro heat pipe, used in electronics cooling, consists of a closed polygonal microchannel filled with a wetting liquid and a long vapor bubble. We model the evaporation, fluid flow, and …
Developing Recognition Criteria For Current-Wave-Enhanced Sediment Gravity Flows, Kathryn Christine Denommee
Developing Recognition Criteria For Current-Wave-Enhanced Sediment Gravity Flows, Kathryn Christine Denommee
LSU Doctoral Dissertations
Sedimentary fabrics preserved in the rock record provide some of the best evidence for interpreting paleo-depositional conditions. Muddy sediments in particular are important paleoenvironmental archives, preserving the most complete stratigraphic record of any rock type in basinal settings. However, the full range of mechanisms responsible for the deposition of muddy sediments, particularly in high-energy settings, remains poorly understood. Although frequently observed in modern settings, muddy prodeltaic deposits are rarely identified in the rock record, in part because no catalogue of easily distinguishable recognition criteria exists for this class of mudstones. In order to help overcome this deficiency, this dissertation project …
I. Synthesis Of Ascarosides For Biological Evaluation And Ii. Development Of Visible Light-Promoted Selenofunctionalization And Grafting Of Aryl Iodides, Elizabeth Susan Conner Balapitiya
I. Synthesis Of Ascarosides For Biological Evaluation And Ii. Development Of Visible Light-Promoted Selenofunctionalization And Grafting Of Aryl Iodides, Elizabeth Susan Conner Balapitiya
LSU Doctoral Dissertations
This dissertation focuses on analog synthesis for biological evaluation and visible light promoted method development. Chapter 1 centers upon the synthesis of Caenorhabditis elegans dauer pheromone analogs. C. elegans is a nematode which, in times of environmental stress, enters a dauer stage. Two highly conserved pathways, which play important roles in some diseases in higher organisms, monitor dauer formation: TGF-β and IGF-1. Dauer formation is triggered by the nematode’s chemosensation of the dauer pheromone, consisting of a group of previously-isolated ascarosides. These compounds differ in chain length, saturation, terminal functionality of side chain, ω vs. ω-1 oxygenation and presence of …
#Becoming: Emergent Identity Of College Students In The Digital Age Examined Through Complexivist Epistemologies, Paul William Eaton
#Becoming: Emergent Identity Of College Students In The Digital Age Examined Through Complexivist Epistemologies, Paul William Eaton
LSU Doctoral Dissertations
This dissertation explores the possibilities and limitations of conducting research on college student identity in the digital age. Utilizing philosophical theories from complexity theory, post-qualitative research, and new materialisms, I interrogate, question, disrupt, and challenge current theories and models of college student identity, largely developed from a positivist, modernist, empiricist perspective. Conducting research on college student identity in the twenty-first century may benefit from discarding the old ‘developmental’ language of the twentieth century, replacing this discourse and understanding with a language drawn from complexity theory. In this regard, I believe educators, researchers, and practitioners should begin talking about identity emergence …
Effects Of Inbreeding On Endangered Red Wolves (Canis Rufus), Kristin E. Brzeski
Effects Of Inbreeding On Endangered Red Wolves (Canis Rufus), Kristin E. Brzeski
LSU Doctoral Dissertations
Inbreeding depression, the reduction in offspring fitness caused by mating among close relatives, is widespread in small populations and a major concern in conservation biology because it can affect population persistence. The negative effects of inbreeding results in the evolution of inbreeding avoidance behaviors; within small populations, such behaviors may encourage individuals to select mates outside of their respective species. Mate choice may also be facilitated by variation at major histocompatibility complex (MHC) genes, a gene group critical for immune response and disease resistance. Given broad impacts of inbreeding and MHC variation on fitness and behavior, evaluating their effects is …
Essays In Labor Economics, Sukriye Elif Filiz
Essays In Labor Economics, Sukriye Elif Filiz
LSU Doctoral Dissertations
In this dissertation, I present three distinct topics on labor economics that can be read independently from one another. In the first chapter, using matched mother-child data from the National Longitudinal Survey of Youth, I investigate the impact of mothers’ involuntary job loss on children’s academic achievement. In the next chapter, I examine the impact of eye and hair color on wages-at-first-job after schooling. In addition, I investigate whether hair color has an impact on the wage-at-the-first-job if the individual resides among people who have similar features. In the last chapter, I examine the impact of unemployment insurance benefit generosity …
To Culture Or Not To Culture: Practices Implemented By Language Immersion Teachers To Teach Culture In Language Immersion Classrooms, Benterah Charles Morton
To Culture Or Not To Culture: Practices Implemented By Language Immersion Teachers To Teach Culture In Language Immersion Classrooms, Benterah Charles Morton
LSU Doctoral Dissertations
Bilingual education has had a resurgence in the United States since the Bilingual Education Act of 1968. Since that time the number of language immersion programs across the country has increased exponentially. Although language immersion programs are a type of bilingual education there are considerable differences in the implementation and intended outcomes. Language immersion programs ascribe to three basic goals: for students to become bi-lingual, bi-literate, and develop a degree of multicultural awareness. This study seeks to begin to explore the methods teachers use to carry out the task of developing a degree of multicultural awareness. To answer this question, …
Pattern Mining And Events Discovery In Molecular Dynamics Simulations Data, Shobhit Sandesh Shakya
Pattern Mining And Events Discovery In Molecular Dynamics Simulations Data, Shobhit Sandesh Shakya
LSU Doctoral Dissertations
Molecular dynamics simulation method is widely used to calculate and understand a wide range of properties of materials. A lot of research efforts have been focused on simulation techniques but relatively fewer works are done on methods for analyzing the simulation results. Large-scale simulations usually generate massive amounts of data, which make manual analysis infeasible, particularly when it is necessary to look into the details of the simulation results. In this dissertation, we propose a system that uses computational method to automatically perform analysis of simulation data, which represent atomic position-time series. The system identifies, in an automated fashion, the …
Junior Level Baccalaureate Nursing Students' Lived Experiences With Test Anxiety: Can Music Serve As A Means To Reduce Test Anxiety And Increase Self-Efficacy?, Keeley Clark Harmon
Junior Level Baccalaureate Nursing Students' Lived Experiences With Test Anxiety: Can Music Serve As A Means To Reduce Test Anxiety And Increase Self-Efficacy?, Keeley Clark Harmon
LSU Doctoral Dissertations
Test anxiety is a pervasive problem in education programs. Nursing education is not an exception as approximately 30% of nursing students are impacted by varying levels of test anxiety that can affect their ability to succeed. This mixed methods study utilizes concepts from Bandura’s Social Learning Theory, the Cognitive-Attentional (Interference) Model, and the Georgi Lozanov method to explore the lived experiences of junior level baccalaureate nursing students with test anxiety. The 39 participants in the quantitative portion of the study were randomly assigned to one of two groups. The experimental group (n=18) listened to a nine minute and 27 second …
A Tale Of Two Cultures: A Qualitative Narrative Of Nigerian Immigrant Parenting In The United States, Chinwe Onwujuba
A Tale Of Two Cultures: A Qualitative Narrative Of Nigerian Immigrant Parenting In The United States, Chinwe Onwujuba
LSU Doctoral Dissertations
Current demographic estimates indicate that the foreign-born population makes up about 13% (40 million) of the total U.S. population. This number consists of immigrants from all over the world, with a larger majority originating from Latin America and Asia. Research in the area of immigrant adaptation is robust and compelling; however, it is replete with studies on immigrants from the cultural regions identified above, and not as much on other regions with relatively less numerical representation, specifically Africa. From this region, Nigerian individuals and families make up a larger portion of this immigrant group. This study employs a qualitative research …
The Electronic Structure Of Environmentally Persistent Free Radicals Formed On Metal Oxide Surfaces, Chad Allen Thibodeaux
The Electronic Structure Of Environmentally Persistent Free Radicals Formed On Metal Oxide Surfaces, Chad Allen Thibodeaux
LSU Doctoral Dissertations
We have investigated the electronic structure of environmentally persistent free radicals (EPFRs) formed on two different metal oxides: Cu(II)O and ZnO. Cu(II)O is known to be one of the most active metal oxides to form EPFRs. ZnO, however, forms the longest-lived EPFRs. First, we examined the adsorption of phenol on different crystal faces of ZnO. Ultraviolet photoelectron spectroscopy (UPS) shows direct evidence of charge transfer away from the ZnO to the phenol. This differs from the hypothesized mechanism of EPFR formation that says that an electron is transferred to the metal oxide. UPS difference spectra also shows that the phenol …