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Effect Of Piezoelectric Actuation On Curved Beams And Single Lap Joints, Calicia Johnson
Effect Of Piezoelectric Actuation On Curved Beams And Single Lap Joints, Calicia Johnson
LSU Master's Theses
Piezoelectric materials have seen a significant usage increase over the past decade. They have been found to be effective as either sensors or actuators in smart structure applications, which allows them to act more as an adaptive system rather than a passive system. Piezoelectric materials are very effective transducers which convert mechanical energy into electrical energy, known as the direct piezoelectric effect or they have the ability to convert electrical energy to mechanical energy, known as the converse piezoelectric effect. The absence of additional mechanical parts, its lightweight and high strength to weight ratio is what make piezoelectric materials so …
Oceanic Light Absorption Properties: Assessment And Characterization In The Southeastern Bering Sea Using Field And Satellite Observations, Puneeta Suresh Naik
Oceanic Light Absorption Properties: Assessment And Characterization In The Southeastern Bering Sea Using Field And Satellite Observations, Puneeta Suresh Naik
LSU Doctoral Dissertations
In recent decades the Bering Sea has been subjected to large climatic variability with cascading consequences on its productive marine ecosystem. Long-term as well as short-term monitoring is essential if we are to maintain its capability to supply the resources on which the national and local economy depend. Remote sensing together with in-situ and laboratory measurements of physical, biological and optical properties have considerable potential for monitoring and measuring the effects of climate-driven changes on this ecosystem. A major shortcoming to obtain accurate estimates of optically active components (such as colored dissolved organic matter, non-algal particulate matter, and phytoplankton) from …
Contextual Influences On Faith Development In Adolescents And Emerging Adults, Katheryn A. Barker
Contextual Influences On Faith Development In Adolescents And Emerging Adults, Katheryn A. Barker
LSU Master's Theses
Recent research has revealed that high religiosity is associated with positive life outcomes in adolescents and emerging adults. However, the mechanisms and processes that underscore faith development, which is crucial to experiencing these outcomes, are not well understood. Furthermore, most research on faith development in adolescents and emerging adults is based on quantitative data and fails to examine the influence of developmental contexts on faith development. To address this, a racially diverse New England sample of 30 highly religious Christian, Jewish, New World faiths, and Muslim families were interviewed regarding their faith and family life. Focusing specifically on the faith …
Anti-Microbial Self-Assembling "Click" Monolayers Utilizing Silver Nanoparticles For Indwelling Medical Devices, Emily Ann Hodges
Anti-Microbial Self-Assembling "Click" Monolayers Utilizing Silver Nanoparticles For Indwelling Medical Devices, Emily Ann Hodges
LSU Master's Theses
The objective of this study was to synthesize and characterize antimicrobial, silver nanoparticles based self-assembling monolayer coatings, for use on chronic indwelling medical devices. The coatings are comprised of novel biomass mediated silver nano particles (SNP) that are biocompatible, highly concentrated, highly pure, cost-effective, polydispersed and compatible for use with existing chronic indwelling medical devices. The HPC SNPs were functionalized with an azide functional group and covalently bound to titanium substrates via ¨Dclick¡¬ chemistry.
A Study On The First-Passage Reliability Problem And Its Application In Earthquake Engineering, Sara Ghazizadeh
A Study On The First-Passage Reliability Problem And Its Application In Earthquake Engineering, Sara Ghazizadeh
LSU Master's Theses
The research presented in this thesis focuses on analytical approximations for the time-variant first-passage failure probability (FPFP) of linear elastic models of structural systems subjected to stochastic excitations. The FPFP is defined as the probability that a response quantity of an engineering system subjected to a dynamic stochastic loading outcrosses a specified threshold within a given exposure time. The FPFP is an important and useful quantity for many structural engineering applications. The classical first-passage reliability problem is studied for linear elastic single-degree-of-freedom (SDOF) and multi-degrees-of-freedom (MDOF) systems subjected to stationary and nonstationary Gaussian excitations. The absolute and relative accuracy of …
Selection And Enumeration Of Low Epcam Expressing Breast Cancer Ctcs Using A High Throughput Microfluidic Device, Brandy Charon Snowden
Selection And Enumeration Of Low Epcam Expressing Breast Cancer Ctcs Using A High Throughput Microfluidic Device, Brandy Charon Snowden
LSU Master's Theses
Breast cancer cells overexpress EpCAM that can be used as a marker to select breast cancer CTCs from heterogeneous clinical samples, even when present in low abundance. This study used MDA-MB-231 cells which have a low expression level of EpCAM (1.7 x 103 binding sites per cell.3) Herein, we will report on the use of antiEpCAM antibodies immobilized onto the surface of a capture bed poised within a PMMA microchip that was fabricated into an HTMSU used for selection of breast cancer CTCs seeded into a buffer solution. The microchannel walls within the capture bed were UV modified for 5, …
A Partial Order On Classical And Quantum States, Arka Bandyopadhyay
A Partial Order On Classical And Quantum States, Arka Bandyopadhyay
LSU Master's Theses
In this work we extend the work done by Bob Coecke and Keye Martin in their paper “Partial Order on Classical States and Quantum States (2003)”. We review basic notions involving elementary domain theory, the set of probability measures on a finite set {a1, a2, ..., an}, which we identify with the standard (n-1)-simplex ∆n and Shannon Entropy. We consider partial orders on ∆n, which have the Entropy Reversal Property (ERP) : elements lower in the order have higher (Shannon) entropy or equivalently less information . The ERP property is important because of its applications in quantum information theory. We …
Contribution Of Bacillus Thuringiensis Cotton Cultivars And Insecticides To A Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), (Lepidoptera : Noctuidae) Management Strategy, Jarrod T. Hardke
LSU Doctoral Dissertations
Fall armyworm, Spodoptera frugiperda (J. E. Smith), response to cottons, Gossypium hirsutum L., expressing Bacillus thuringiensis (Bt) insecticidal proteins, Cry1Ac (Bollgard®), Cry1Ac + Cry2Ab (Bollgard II®), and Cry1Ac + Cry1F (WideStrike™), was evaluated in field and laboratory experiments. In field trials, larvae that were infested on selected fruiting forms (squares, white flowers, and bolls) of WideStrike™ plants had lower survivorship and caused less injury than larvae on non-Bt plants, regardless of fruiting structures. Bollgard® and Bollgard II® plants produced no consistent negative effects on fall armyworm survivorship and injury. In no-choice laboratory assays, Bollgard II® and WideStrike™ cotton tissue reduced …
Carbon Sequestration And Uneven-Aged Management Of Loblolly Pine Stands In The Southern Usa: A Joint Optimization Approach, Rajan Parajuli
Carbon Sequestration And Uneven-Aged Management Of Loblolly Pine Stands In The Southern Usa: A Joint Optimization Approach, Rajan Parajuli
LSU Master's Theses
Forest carbon sequestration is regarded as a viable and cost effective option for reducing global greenhouse gas emissions. Several research studies analyzed the effects of joint management of carbon and timber under different even-aged forest management scenarios, and concluded that carbon benefits can alter forest management schedules significantly. However, research specifically focused on the inclusion of carbon sequestration benefits into uneven-aged management has received little attention. This study determined the optimum joint management regime of timber and carbon in uneven-aged loblolly pine stands in Louisiana, and assessed management and financial effects resulting from the integration of carbon benefits into uneven-aged …
There's An App For That: The Ways Young Adults Access Digital Information, Cydney Lauren Palmer
There's An App For That: The Ways Young Adults Access Digital Information, Cydney Lauren Palmer
LSU Master's Theses
Despite the popular use of smartphones and mobile applications (apps) and their potential impacts in the near future, only scant academic attention has been paid to mobile apps, especially in respect to the gratifications sought from accessing digital information via apps. This exploratory study investigated the relationship between young adults and their use of mobile apps in accessing digital information, particularly in comparison to the current go-to digital information access device, Internet browsers. In addition, this study examined how levels of perceived privacy concern influence digital information use and how the use of digital information access modalities and the level …
Comparison Of Disk Diffusion, Agar Dilution, And Broth Microdiultion For Antimicrobial Susceptibility Testing Of Five Chitosans, Lin Jiang
LSU Master's Theses
Chitosan is a polysaccharide biopolymer with excellent biocompatibility, biodegradability, and low toxicity, which allows for potential wide applications. Recently, antimicrobial activities of chitosan against foodborne pathogens have been studied; many used disk diffusion to determine the activity. However, this method is unable to obtain minimal inhibitory concentrations (MICs), i.e., not quantitative. The objective of this study was to compare disk diffusion with agar dilution and broth microdilution, two quantitative methods used routinely in clinical laboratories, to determine MICs of chitosan against foodborne pathogens. Five chitosan compounds with molecular weights ranging between 43 and 1,100 kDa were tested against 36 representative …
Biomechanical Evaluation Of Medial And Lateral Approaches For Experimentally Created Medial Condylar Fractures Of The Equine Third Metacarpal Bone, Saybl Beauton Sprinkle
Biomechanical Evaluation Of Medial And Lateral Approaches For Experimentally Created Medial Condylar Fractures Of The Equine Third Metacarpal Bone, Saybl Beauton Sprinkle
LSU Master's Theses
Objective -To compare the compression produced in reduction of experimentally created medial condylar fractures using lag screw fixation with medial vs. lateral approach, and to determine the maximum torque at screw failure. Materials and Methods- Twelve (12) pairs (left and right) 3rd metacarpal bones (MC3) were collected from adult (2-7 years) Thoroughbreds euthanized for reasons unrelated to orthopedic disease. Complete parasagittal medial condylar osteotomies were created at a measurement of 9, 13, and 21 mm axial to the epicondylar fossa on four pairs each of cadaveric MC3 bones resulting in fracture fragments measuring 8, 12, and 20 mm in thickness. …
The Relationship Between Music And Visual Arts Formal Study And Academic Achievement On The Eighth-Grade Louisiana Educational Assessment Program (Leap) Test, Richard Allen Baker Jr.
The Relationship Between Music And Visual Arts Formal Study And Academic Achievement On The Eighth-Grade Louisiana Educational Assessment Program (Leap) Test, Richard Allen Baker Jr.
LSU Doctoral Dissertations
The purpose of this study was to examine the policy implications allowing administrators to exempt a student from required arts instruction if the student obtained unsatisfactory scores on the high-stake state mandated tests in English and mathematics. This study examined English language arts and math test scores for 37,222 eighth grade students enrolled in music and/or visual arts classes and those students not enrolled in arts courses. There were more than 12,000 students who were eligible, but not enrolled in arts courses. Methodology consisted of comparing the mean scores of students receiving music and visual arts instruction with the mean …
Wave Forces On Bridge Decks And Damping Techniques To Reduce Damages, Aaron Michael Henry
Wave Forces On Bridge Decks And Damping Techniques To Reduce Damages, Aaron Michael Henry
LSU Master's Theses
The population of the Gulf Coast has grown immensely since 1960. Bridges along the coast are a vital part of this area’s infrastructure. They impact the transportation of goods and services, as well as the tourism in these areas. Many of these coastal bridges are at risk of being damaged or even destroyed during extreme weather events. This can cause not only short and long-term monetary problems, but the damage also can exacerbate the issues in getting people out of dangerous areas and getting help into areas in need, after an event. Damages during extreme weather events are the result …
A C0 Interior Penalty Method For The Von Kármán Equations, Armin Karl Reiser
A C0 Interior Penalty Method For The Von Kármán Equations, Armin Karl Reiser
LSU Doctoral Dissertations
In this dissertation we develop a C0 interior penalty method for the von Kármán equations for nonlinear elastic plates. We begin with a brief survey on frequently used finite element methods for the von Kármán equations. After addressing some topics from functional analysis in the preliminaries, we present existence, uniqueness and regularity results for the solutions of the von Kármán equations in Chapter 3. In the next chapter we review the C0 interior penalty method for the biharmonic problem. Motivated by these results, we propose a C0 interior penalty method for the linearized von Kármán equations in …
A Comparative Study Of Cellulose I And Ii And Fibers And Nanocrystals, Yiying Yue
A Comparative Study Of Cellulose I And Ii And Fibers And Nanocrystals, Yiying Yue
LSU Master's Theses
The influence of sodium hydroxide treatment on the structure of cotton fibers was studied. Compared to raw cotton fibers, the entire bundles of mercerized fibers were converted into a swollen and roughened state. Fourier transform infrared spectrometry (FTIR) indicated that intermolecular hydrogen bonding was enhanced by mercerization treatment. Wide-angle X ray diffraction (WXRD) results showed decreased fiber crystallinity after mercerization. The structure of cellulose II fibers was more thermally stable than cellulose I fibers. Mechanical properties of cotton fiber-reinforced polyethylene oxide (PEO) composites demonstrated that both raw and mercerized cotton fibers enhanced their tensile strength of the PEO matrix, but …
An Intelligent Othello Player Combining Machine Learning And Game Specific Heuristics, Kevin Anthony Cherry
An Intelligent Othello Player Combining Machine Learning And Game Specific Heuristics, Kevin Anthony Cherry
LSU Master's Theses
Artificial intelligence applications in board games have been around as early as the 1950's, and computer programs have been developed for games including Checkers, Chess, and Go with varying results. Although general game-tree search algorithms have been designed to work on games meeting certain requirements (e.g. zero-sum, two-player, perfect or imperfect information, etc.), the best results, however, come from combining these with specific knowledge of game strategies. In this MS thesis, we present an intelligent Othello game player that combines game-specific heuristics with machine learning techniques in move selection. Five game specific heuristics, namely corner detection, killer move detection, blocking, …
Cost And Performance Modeling Of The Mu-Decoder, Raghavendra Kongari
Cost And Performance Modeling Of The Mu-Decoder, Raghavendra Kongari
LSU Master's Theses
In this thesis we study the implementation details of the MU-Decoders, a recently proposed hardware module that has been theoretically shown to be superior to other methods for generating subsets of large sets. Our study confirms this advantage. Specifically, we compare the performance of implementations of the LUT-Decoder (the most common configurable decoder) to the MU-Decoder. We show that for while the LUT-Decoder is slightly better than the MU-Decoder for arbitrary (and artificial) inputs, for a large class of inputs called totally ordered subsets, that have practical significance, the MU-Decoder is vastly superior in area to the LUT-Decoder. In terms …
Influence Of Sand Topdressing On Bermudagrass Thatch Decomposition, Dustin S. Parker
Influence Of Sand Topdressing On Bermudagrass Thatch Decomposition, Dustin S. Parker
LSU Master's Theses
Methods to control thatch layers in mature turfgrasses have relied on sand-topdressing and/or mechanical removal. Mechanical removal of thatch through vertical mowing and aerification is effective but disruptive to playing surfaces compared to sand topdressing. As a result, many turf managers have opted to implement sand-topdressing regiments as their primary method for reducing thatch buildup. This research was conducted to 1) determine the effect of cultivar on thatch decomposition and 2) examine the effect of sand topdressing on thatch microenvironment and decomposition. Sand topdressing treatments consisting of sterilized or non-sterilized sand applied at 0.4 cm 14 d-1 or as a …
Use Of Harvest Aid In Soybean: Application Timing, Economics And Interactions In Ipm Programs, Joseph Michael Boudreaux
Use Of Harvest Aid In Soybean: Application Timing, Economics And Interactions In Ipm Programs, Joseph Michael Boudreaux
LSU Master's Theses
Indeterminate and determinate soybean (Glycine max (L). Merr.) cultivars were treated with the harvest aids, paraquat and sodium chlorate, when moisture of seed collected from the uppermost four nodes of plants averaged 60, 50, 40, 30, and 20% (+ or - 2%). Harvest aid application at 60% seed moisture reduced yield of the Maturity Group (MG) IV indeterminate cultivar 15%, but yield was not affected with application at 50% seed moisture. For MG V and MG VI determinate cultivars, application at 60 and 50% seed moisture reduced yield 4 to 22%, but yield was not affected when harvest aid was …
Proteomic Analysis Of The Blood Of Alligator Mississippiensis, Lancia Nadinia Fallen Darville-Bowleg
Proteomic Analysis Of The Blood Of Alligator Mississippiensis, Lancia Nadinia Fallen Darville-Bowleg
LSU Doctoral Dissertations
My research focus was to investigate alligator blood using mass spectrometry-based proteomics methods to understand their innate immune systems. The first goal was to sequence peptides and proteins from the blood serum and leukocytes using tandem mass spectrometry and de novo sequencing. The second goal was to determine the function of these biological molecules and their relationship to the immune system. One- and two-dimensional gel electrophoresis was used to separate proteins from alligator leukocytes, which were enzymatically digested. The peptides were measured using reversed phase nano-high performance liquid chromatography coupled with tandem mass spectrometry (nano-HPLC-MS/MS) followed with de novo sequencing. …
Characterization Of The Subcortical Interactions Between Larvae Of The Southern Pine Sawyer Monochamus Titillator (F.) And The Larvae Of The Southern Pine Beetle Guild Using Molecular Gut Analyses, Erich N. Schoeller
LSU Master's Theses
The southern pine beetle guild (Coleoptera: Curculionidae: Scolytinae) is arguably the most destructive group of forest pests in the Southeastern United States. Laboratory assays suggest that larvae of wood borer associates from the genus Monochamus (Coleoptera: Cerambycidae) may be facultative intraguild predators of southern pine beetle guild. In this study the dynamics of the subcortical interactions between M. titillator (F.) and members of the southern pine beetle guild were examined using PCR-based molecular gut content analyses. Species-specific PCR primer sets were developed to work under multiplex PCR conditions to detect DNA of members of southern pine beetle guild in the …
Mapping And Modeling Of Neglected Tropical Diseases In Brazil And Bolivia, Paula Mischler
Mapping And Modeling Of Neglected Tropical Diseases In Brazil And Bolivia, Paula Mischler
LSU Doctoral Dissertations
Accurately defining disease distributions and calculating disease risk is an important step in the control and prevention of diseases. This study used geographical information systems and remote sensing technologies within the MaxEnt ecological niche modeling program to create predictive risk maps for leprosy and Schistosomiasis in Brazil and Chagas disease in both Brazil and Bolivia. New disease cases were compiled for leprosy, Schistosomiasis, and Chagas disease from the Brazilian ministry of Health for 2001 to 2009 and the data was stratified to a 10,000 population for each municipality. Bolivian Chagas prevalence rates were calculated from 2007 to 2009 survey data. …
Interfacial Shear Bond Strength Between Old And New Concrete, Zhifu Wan
Interfacial Shear Bond Strength Between Old And New Concrete, Zhifu Wan
LSU Master's Theses
The quality of the bonded concrete overlay depends on the bonding at the layer’s interface, which is affected by water to cement (w/c) ratio in new concrete, moisture condition of old concrete surface. The objective of this study is to quantify the interface shear bond strength affected by these variables. At the Phase I, twelve old concrete cubes with two different moisture conditions (air dry, saturated surface dry (SSD)) at the interface were chosen. Silica fume addition with two w/c ratios of 0.45 and 0.6 were used for new overlay concrete. It was found that silica fume significantly increased both …
Pavement Structural Evaluation Using The Rolling Wheel Deflectometer, Ahmed Moustafa Abdel-Khalek
Pavement Structural Evaluation Using The Rolling Wheel Deflectometer, Ahmed Moustafa Abdel-Khalek
LSU Master's Theses
The Rolling Wheel Deflectometer (RWD) offers the benefit to measure pavement deflection without causing any traffic interruption or compromising safety along the tested road segments. This study describes a detailed field evaluation of the RWD system in Louisiana in which 16 different test sites representing a wide array of pavement conditions were tested. Measurements were used to assess the repeatability of RWD measurements, to examine the effect of truck speeds, and to study the relationship between RWD and FWD deflection measurements and pavement conditions. Based on the results of the experimental program, it was determined that the repeatability of RWD …
Social Vulnerability In Louisiana's Upper Industrial Corridor: Spatial Distribution And Linkages With Cumulative Pollution - A Zip Code Level Analysis, María Belén Toscano
Social Vulnerability In Louisiana's Upper Industrial Corridor: Spatial Distribution And Linkages With Cumulative Pollution - A Zip Code Level Analysis, María Belén Toscano
LSU Master's Theses
Louisiana’s industrial corridor, the stretch of the lower Mississippi River from New Orleans to Baton Rouge, is one of the areas with the highest concentration of petrochemical facilities and chemical plants in the United States, as well as one of the most heavily polluted. In particular, the present study examined the associations of social vulnerability and potential exposure to environmental pollution in the upper section of the industrial corridor, the Baton Rouge Metropolitan Statistical Area (MSA). The study was based on the methodology developed by Cutter et al. (2003) to construct an empirically derived index to measure social vulnerability to …
Spray Drying Technology For The Production And Processing Of Microencapsulated Omega-3 Fish Oil With Egg Powder, Kevin Estuardo Mis Solval
Spray Drying Technology For The Production And Processing Of Microencapsulated Omega-3 Fish Oil With Egg Powder, Kevin Estuardo Mis Solval
LSU Master's Theses
Protein with essential amino acids is required for recovering, repairing, and building muscles after intensive exercise. A powder produced with egg white (EW) (high quality protein) and fish oil (menhaden (Brevoortia patronus) (MO) oil or salmon oil (SO)) with high DHA and EPA content should be particularly beneficial for athletes. The objective of this study was to develop microencapsulated omega-3 fatty acids fortified EW powders. Two stable emulsions were prepared with 3.43% (MO) or (SO), 56.21% EW, and 40.36% water (E-MO-EW and E-SO-EW). An EW with water solution (without fish oil) (E-EW) was prepared as a control. Two emulsions (E-MO-EW; …
La Ola Verde: Female, Hispanic Consumers And The Green Movement, Stefanie Ann Ramirez
La Ola Verde: Female, Hispanic Consumers And The Green Movement, Stefanie Ann Ramirez
LSU Master's Theses
Due to their impact on the environment, apparel companies have gradually begun to change manufacturing and production processes and provide consumers with environmentally responsible apparel product options. Among these consumers are Hispanics, a consumer group which research has shown to have a strong purchasing power and astounding population increase. Between 2000 and 2010, the total population in the United States increased by 23.7million people, with Hispanics accounting for over 50% of that total increase (Humes, Jones, & Ramirez, 2011). It is estimated that by 2125 Hispanics will account for 50% of the total U.S. population (Day, 1996). Additionally, between 1990 …
Redox-Active Liposome Delivery Agents With Highly Controllable Stimuli-Responsive Behavior, Nicole Hollabaugh Carrier
Redox-Active Liposome Delivery Agents With Highly Controllable Stimuli-Responsive Behavior, Nicole Hollabaugh Carrier
LSU Doctoral Dissertations
Over the last few decades, liposomes have generated a lot of interest as drug delivery vehicles to address the need for providing both increased therapeutic efficacy and decreased systemic exposure, simultaneously. The challenge of increasing drug accumulation at diseased sites, without compromising the integrity and stability of the liposomal carrier during circulation, has been met with two possible solutions: (1) active targeting and (2) active triggering. To achieve selective and site-specific delivery of drugs to tumors, active triggering methods have been developed wherein a responsive element is incorporated into the liposomal bilayer, which causes destabilization of the liposome upon exposure …
The Lower Ninth Ward: Resistance, Recovery, And Renewal, Alexandra Giancarlo
The Lower Ninth Ward: Resistance, Recovery, And Renewal, Alexandra Giancarlo
LSU Master's Theses
After Hurricane Katrina of 2005, New Orleans’s Lower Ninth Ward became an icon for the failure of recovery efforts and the persistence of inequality and poverty in American society. However, for as long as this community has been marginalized it has been creating advocacy organizations and counter-narratives that battled discrimination and imbued its cultural practices with meaning. Residents often speak of a profound sense of community attachment, a commitment to educational prospects, and a deep historic and cultural identity. Historically, this area has been home to various social and legal campaigns, mirroring the contemporary protests that arose when residents encountered …