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Articles 1 - 30 of 77
Full-Text Articles in Physical Sciences and Mathematics
Evaluating Quaternary Glacial Till Sheet Volume And Duration Of Grounding Events Using Sediment Flux Calculations In The Eastern Basin Paleotroughs, Ross Sea, Anarctica, Logan Gregory Kirst
Evaluating Quaternary Glacial Till Sheet Volume And Duration Of Grounding Events Using Sediment Flux Calculations In The Eastern Basin Paleotroughs, Ross Sea, Anarctica, Logan Gregory Kirst
LSU Master's Theses
A sequence of three seismically-resolvable, back-stepping grounding zone wedges (GZWs) within the Glomar-Challenger Basin paleo-ice-stream trough is conventionally interpreted to have been deposited by the West Antarctic Ice Sheet (WAIS) since the end of the Last Glacial Maximum (LGM). For this to be true, there would have to have been voluminous GZW deposition via fast moving ice streams with high sediment flux during the short timeframe since the WAIS retreat began at 11 Ka 14C BP and when the WAIS moved south of Roosevelt Island at 3.2 Ka BP. In contrast to this interpretation of how the near-surface stratigraphy relates …
A Clay Mineral Provenance Study Of The Northern Pandora Trough Continental Margin, Gulf Of Papua, Ashley Len Howell
A Clay Mineral Provenance Study Of The Northern Pandora Trough Continental Margin, Gulf Of Papua, Ashley Len Howell
LSU Master's Theses
X-ray diffraction mineralogy of western-, central-, and eastern-derived fluvial sediments within the Gulf of Papua exhibits distinct and mixed clay mineral assemblages. These mineral assemblages allow for a better understanding of how a thick muddy continental margin shelf-edge depocenter in the eastern Gulf of Papua of latest Pleistocene/early Holocene age formed, as well as connections between terrestrial sediment delivery and evolution of deep-sea deposits in this region. Modern clay mineralogy reveals a high to low gradation of illite/smectite values from the western to eastern Gulf of Papua (Slingerland et al., 2008a), which is applied to the recent past for provenance …
High Resolution Tephra And U/Pb Chronology Of The 3.33 – 3.26 Ga Mendon Formation, Barberton, Greenstone Belt, South Africa, Nicholas Burns Decker
High Resolution Tephra And U/Pb Chronology Of The 3.33 – 3.26 Ga Mendon Formation, Barberton, Greenstone Belt, South Africa, Nicholas Burns Decker
LSU Master's Theses
The Mendon Formation in the Barberton Greenstone Belt of South Africa marks the boundary between the Onverwacht and Fig Tree Groups. These groups are characterized by mafic to ultramafic volcanism and felsic volcanism with related epiclastic sedimentation, respectively. This transition marks the end of komatiitic volcanism in the Barberton Greenstone Belt and is accompanied by numerous impact-related spherule layers. This study characterizes the upper Mendon Formation texturally and geochemically over a wide areal extent and across structure and facies change in an attempt to better understand the evolution of tectonic processes at this boundary. A suite of whole rock and …
The Effects Of Implementing The Cooperative Learning Structure, Numbered Heads Together, In Chemistry Classes At A Rural, Low Performing High School, Daniel Paul Baker
The Effects Of Implementing The Cooperative Learning Structure, Numbered Heads Together, In Chemistry Classes At A Rural, Low Performing High School, Daniel Paul Baker
LSU Master's Theses
Due to the positive academic results in numerous studies on cooperative learning and the need and desire to improve academic results in East Feliciana High School Chemistry classes, the implementation of a cooperative learning structure called “numbered heads together” was studied during the spring 2013 semester at this rural, low performing high school. Numbered heads together was utilized during three units of a Chemistry class with 24 students and three units of an AP Chemistry with 11 students after completion of two units taught without the use of any type of cooperative learning structure. Using pre- and post-tests, learning gain …
Predicting Potential Unconventional Production In The Tuscaloosa Marine Shale Play Using Thermal Modeling And Log Overlay Analysis, Hunter Berch
LSU Master's Theses
The Tuscaloosa Marine Shale formation (TMS) of Central Louisiana and South Mississippi was suggested as a potential hydrocarbon play with up to seven billion barrels of reserves in a 1997 study by Louisiana State University’s Basin Research Institute. The TMS is considered an unconventional resource because it is a source, reservoir, and seal. Since 1997, horizontal drilling and hydraulic fracturing have enabled exploration and documentation of oil reserves in this play. Prior to this study, high resistivity log curves were used to predict areas of economic interest. While areas of high resistivity within the TMS are often indicative of high …
Matrix-Assisted Laser Desorption Ionization Mass Spectrometry For Identificaiton Of Shrimp, Venkatesulu Salla
Matrix-Assisted Laser Desorption Ionization Mass Spectrometry For Identificaiton Of Shrimp, Venkatesulu Salla
LSU Master's Theses
Matrix-assisted laser desorption ionization (MALDI) time of flight mass spectrometry was used to identify shrimp at the species level using commercial mass spectral fingerprint matching software (Bruker Biotyper). In the first step, a mass spectrum reference database was constructed from the analysis of six shrimp species that are commercially important in the United States: L. setiferus, F. azticus, S. brevirostris, P. robustus, P. dispar and P. platyceros. In the second step, the reference database was tested using 74 unknown shrimp samples from these six species. Correct identification was achieved for 72 of the 74 samples (97 percent): 72 samples were …
An Analysis Of The Influences On Household-Level Adaptations To Environmental Hazards, Tiia Maria Carraway
An Analysis Of The Influences On Household-Level Adaptations To Environmental Hazards, Tiia Maria Carraway
LSU Master's Theses
Utilizing a randomized phone survey of coastal Louisiana residents, this study will focus on identifying which influences from a resident’s exposure, socio-economic vulnerability and adaptive capacity are the best indicators of an individual’s resilience. Two binary logistic regression models were developed to test the associations of resident response to: 1) acute hazards via household emergency plan adoption and 2) chronic hazards represented by behavior modification in response to daily air quality reporting where adoption of these two risk-reducing behaviors are viewed as increased individual resilience. Bivariate correlation analysis found that a north – south grouping of coastal Louisiana was significantly …
Uncertainty Quantification Of Film Cooling Effectiveness In Gas Turbines, Hessam Babaee
Uncertainty Quantification Of Film Cooling Effectiveness In Gas Turbines, Hessam Babaee
LSU Master's Theses
In this study the effect of uncertainty of velocity ratio on jet in crossflow and particual- rly film cooling performance is studied. Direct numerical simulations have been combined with a stochastic collocation approach where the parametric space is discretized using Multi-Element general Polynomial Chaos (ME-gPC) method. Velocity ratio serves as a bifurcation parameter in a jet in a crossflow and the dynamical system is shown to have several bifurcations. As a result of the bifurcations, the target functional is observed to have low-regularity with respect to the paramteric space. In that sense, ME-gPC is particularly effective in discretizing the parametric …
Lost In Translation : Algebraic Modeling In The Middle School Classroom, Danielle Denise Ricks
Lost In Translation : Algebraic Modeling In The Middle School Classroom, Danielle Denise Ricks
LSU Master's Theses
This study was conducted to investigate the disparity that seems to exist in students’ abilities to solve equations, solve word problems, and model word problems with algebraic equations. Over the course of fourteen-weeks, students enrolled in an advanced seventh grade mathematics course were given a series of algebra assignments, tasks, and surveys that focused on students’ abilities to solve and write algebraic equations. The results show that students are more competent in determining solutions for equations and simple word problems than modeling word problems with algebraic equations. Students were willing to exert substantial effort to use arithmetic procedures to find …
Subsurface Stratigraphic Architecture Of Pleistocene Sediments In The Greater New Orleans Area, James Ayrer
Subsurface Stratigraphic Architecture Of Pleistocene Sediments In The Greater New Orleans Area, James Ayrer
LSU Master's Theses
A major environmental and economic problem currently faces the New Orleans area, in southeastern Louisiana, stemming from salinization of freshwater aquifers that are important resources for the community. Major pumping of these aquifers has altered the potentiometric flow, allowing saltier bodies of water to flow into the region. The impact of pumping wells on encroachment of saltwater and the time as well as the route for saltwater to travel from the current saltwater-freshwater interface to pumping centers is not well constrained. Water planners need additional information to make decisions about future management of groundwater resources. The most effective way to …
Long-Term Total Suspended Sediment Yield Of Coastal Louisiana Rivers With Spatiotemporal Analysis Of The Atchafalaya River Basin And Delta Complex, Timothy Rosen
LSU Master's Theses
The modern day Mississippi River Delta Plain and the Louisiana Chenier Plain have been greatly altered through anthropogenic changes to course and hydrological conditions of the Mississippi River and local rivers, most notably by levees that have excluded the Mississippi River from the delta plain. This has slowed accretion and increased land loss destroying vast quantities of marsh, endangering many coastal communities. This master’s thesis examined long-term total suspended sediment yield of four Chenier Plain rivers, total suspended sediment yield of the Mississippi River under different flow conditions, and total suspended sediment dynamics of the Atchafalaya River in relation to …
Metamorphic And Geochemical Signatures Of Calc-Silicate Gneisses From The Sawtooth Metamorphic Complex, Idaho, Usa : Implications For Crustal Evolution In Western North America, Isis Fukai
LSU Master's Theses
The Sawtooth Metamorphic Complex (SMC) of central Idaho contains exposures of metasupracrustal rocks that may provide constraints on Precambrian crustal evolution in northwestern United States. Petrographic textures, whole-rock geochemistry, and thermobarmetry of SMC calc-silicate gneisses, collected at high-resolution, record multiple stages of crustal development, including: contiguous deposition of a sandstone-to-shale sequence derived from post-Archean continental sediments, metamorphism during two medium-high-grade thermal events (M1, M2), and two distinct episodes of deformation (D1, D2). Whole-rock concentrations of Cr (23.97-76.43 ± 3.0 ppm), Ni (6.82-33.10 ± 3.5 ppm), Th (2.11-12.04 ± 1.6 ppm), Sc (3.81-11.53 ± 1.6 ppm), and Zr (322-658 ± 3.9 …
Natural Fracture Characterization In The Haynesville Shale, East Texas: A Core Study, Frank Leslie Morgan
Natural Fracture Characterization In The Haynesville Shale, East Texas: A Core Study, Frank Leslie Morgan
LSU Master's Theses
The Haynesville Shale in East Texas and Northwest Louisiana is one of the most studied and explored shale-gas plays in the United States. With new horizontal drilling and completion strategies, energy companies can produce hydrocarbons directly from the source rock making the Haynesville Shale an attractive resource. A key component of enhanced hydrocarbon production is the presence of natural fractures. They may serve as permeable pathways for hydrocarbon flow, especially in tight shales such as in the Haynesville Shale, where the matrix permeability is very low. In the case of the Haynesville Shale, little is known about the occurrence of …
Incorporating Calculus Concepts Into A Middle School Classroom, Randie Barbera Bailey
Incorporating Calculus Concepts Into A Middle School Classroom, Randie Barbera Bailey
LSU Master's Theses
The Common Core State Standards for Mathematics were released in June of 2010 and full implementation into our schools is being required in the fall of 2013. The standards require teachers and students to be more focused and rigorous in what they teach and learn. This shift in learning towards focus, coherence, fluency, deep understanding, and applications was to improve math education in the United States so that our students become more competitive in the global economy of the 21st century and to help more students to be college and career ready by grade twelve. It is now necessary for …
Bayesian Inference Application To Burglary Detection, Ishan Singh Bhale
Bayesian Inference Application To Burglary Detection, Ishan Singh Bhale
LSU Master's Theses
Real time motion tracking is very important for video analytics. But very little research has been done in identifying the top-level plans behind the atomic activities evident in various surveillance footages [61]. Surveillance videos can contain high level plans in the form of complex activities [61]. These complex activities are usually a combination of various articulated activities like breaking windshield, digging, and non-articulated activities like walking, running. We have developed a Bayesian framework for recognizing complex activities like burglary. This framework (belief network) is based on an expectation propagation algorithm [8] for approximate Bayesian inference. We provide experimental results showing …
An Evaluation Of Oyster Stocks, Grow-Out Conditions, And Off-Bottom Culture Methods For Increasing Commercial Production Of Eastern Oysters (Crassostrea Virginica) In The Northern Gulf Of Mexico, Justin Morgan Leonhardt
An Evaluation Of Oyster Stocks, Grow-Out Conditions, And Off-Bottom Culture Methods For Increasing Commercial Production Of Eastern Oysters (Crassostrea Virginica) In The Northern Gulf Of Mexico, Justin Morgan Leonhardt
LSU Master's Theses
This project examined the ecologically and economically valuable eastern oyster (Crassotrea virginica) in Louisiana with two field experiments. Little information has been gathered on the performance of local Louisiana oyster stocks and no study has focused on a comparison of stocks among variable estuarine conditions. Additionally, the use of alternative grow-out methods and intensive cage aquaculture has never been evaluated in Louisiana. For the first study, a dermo-resistant stock of oysters (LSU-OYS: ‘OBOY’) was compared to three wild oyster stocks along a salinity gradient. The objectives of this study were to determine the optimal oyster stock(s) and the ideal grow-out …
Using Formative Assessment To Enhance Student Performance On Geometric Proof Writing, Benjamin Hargrave
Using Formative Assessment To Enhance Student Performance On Geometric Proof Writing, Benjamin Hargrave
LSU Master's Theses
The purpose of this research is to uncover best practices to create competent proof writers. Studies have shown the best setting to do this is in the high school geometry classroom. Throughout a yearlong study of geometry, students were exposed to theorems and their demonstrations. Despite constant exposure, students were still unable to produce their own proof of propositions. The questions then became how can an educator provide critical feedback that encourages student reasoning and develops logical argumentation skills? With the goal in mind, twenty-five students enrolled in a geometry course at Baton Rouge High School in Baton Rouge, Louisiana …
A Middle School's Response To Intervention : Successmaker For Math Remediation, Lauren Hutchinson
A Middle School's Response To Intervention : Successmaker For Math Remediation, Lauren Hutchinson
LSU Master's Theses
This thesis discusses the results obtained upon the implementation of an online math remediation program, SuccessMaker, as a component of Response to Intervention (RTI). The objective was to increase the content knowledge of students struggling in math. Woodlawn Middle chose a targeted group of students considered “at risk” in hopes of preparing them for the Louisiana Educational Assessment Program (LEAP). Yearly gains in SuccessMaker were compared to achievement levels on the math section of the LEAP test. Results showed that the more time spent on Success Maker resulted in higher gains in grade level. The gains in SuccessMaker did not …
Some Effects Of Nutrient And Flooding Stress Manipulation On Coastal Louisiana Wetland Vegetation, James Stephen Ialeggio
Some Effects Of Nutrient And Flooding Stress Manipulation On Coastal Louisiana Wetland Vegetation, James Stephen Ialeggio
LSU Master's Theses
Freshwater diversions are a relatively recently utilized tool in wetland loss mitigation that stimulate an organic accretion response in marsh vegetation, which is based in root production and thus belowground biomass. The effectiveness of freshwater diversions in slowing marsh loss probably varies across a gradient of the factors they supply: decreased salinity, increased nutrient concentrations, and increased inundation. Flooding stress is commonly thought to be the overriding factor limiting wetland vegetation growth, however its influence may vary across salinity and nutrients. Therefore, plugs of Spartina patens were planted in four “marsh organs” consisting each of 36 sediment-filled PVC pipes of …
Statistical Classification Problems In Assessment Of Teachers, Xuan Wang
Statistical Classification Problems In Assessment Of Teachers, Xuan Wang
LSU Master's Theses
Classification and regression trees form an important and indispensable tool in data analysis and classification problems. Class trees are described in detail with examples. The method is applied to a data set pertaining to evaluation of teachers. In addition, two other classification methods, bagging and AdaBoost are explained. These methods improve existing classifiers to nearly optimal classifiers.
Assessment Of Detection And Characterization Of Simulated Lung Nodules With Low-Dose Ct, Kendrick J. Williams
Assessment Of Detection And Characterization Of Simulated Lung Nodules With Low-Dose Ct, Kendrick J. Williams
LSU Master's Theses
Purpose: The quality of a computed tomography (CT) image and the dose delivered depend upon the acquisition parameters used to acquire the CT scan. Current, voltage and pitch are acquisition parameters that affect the image quality. The purpose of this study was to determine the influence of current, voltage and pitch on physicians’ ability to characterize small, solid nodules with low-dose computed tomography. Methods: A database of lung scans with various acquisition parameters was compiled. A torso phantom and acrylic beads were used to simulate the lungs and nodules within the lungs. Several sizes of acrylic sphere were used to …
Spatial Variations In Salinity And Temperature Around The Bay Marchand Salt Dome, Offshore Louisiana, Laurie Richards
Spatial Variations In Salinity And Temperature Around The Bay Marchand Salt Dome, Offshore Louisiana, Laurie Richards
LSU Master's Theses
The Bay Marchand field is located about 60 miles south of New Orleans, Louisiana on the continental shelf. The structurally complex field has produced over 960 MMBOE as of 2012 (http://www.eplweb.com), with many of these hydrocarbons being trapped against the massive salt dome and associated faulting present in the area. A study by Bruno and Hanor (2003) documented the presence of a high salinity plume off the southeast flank of the dome that had less saline and less dense pore water below it. The purpose of this study was to investigate the spatial variations in pore water salinity and temperature …
Hydraulic Fracturing And Water Use In Dallas, Texas, Sarah Yates
Hydraulic Fracturing And Water Use In Dallas, Texas, Sarah Yates
LSU Master's Theses
Dallas, Texas is located in North Texas and sits above the eastern portion of the Barnett Shale natural gas formation. Hydraulic fracturing, or “fracking”, was introduced to the region as a means to access previously inaccessible natural gas within the formation. This fracking concerns many because it requires large amounts of fresh water, an average of over 4 million gallons per well within Dallas Water Utilities’ service area. This thesis examines whether water use for fracking will have a negative effect on the water supply for the city of Dallas and its wholesale water customer cities. The water is typically …
Adaptive Stochastic Conjugate Gradient Optimization For Temporal Medical Image Registration, Huanhuan Xu
Adaptive Stochastic Conjugate Gradient Optimization For Temporal Medical Image Registration, Huanhuan Xu
LSU Master's Theses
We propose an Adaptive Stochastic Conjugate Gradient (ASCG) optimization algorithm for temporal medical image registration. This method combines the advantages of Conjugate Gradient (CG) method and Adaptive Stochastic Gradient Descent (ASGD) method. The main idea is that the search direction of ASGD is replaced by stochastic approximations of the conjugate gradient of the cost function. In addition, the step size of ASCG is based on the approximation of the Lipschitz constant of the stochastic gradient function. Thus, this algorithm could maintain the good properties of the conjugate gradient method, meanwhile it uses less gradient computation time per iteration and adjusts …
Evaluation Of Thermal Insulation By Coal Beds In The Western Arkoma Basin, Ok And Implications For Large Scale Geothermal Resources, Matthew Freeman
Evaluation Of Thermal Insulation By Coal Beds In The Western Arkoma Basin, Ok And Implications For Large Scale Geothermal Resources, Matthew Freeman
LSU Master's Theses
Weighted average geothermal gradients in the Western Arkoma Basin, Oklahoma are estimated from bottom hole temperatures (BHT) from 158 oil and gas wells. The regional geothermal gradient is 28.8 °C/km. The central and north central portions of the basin have higher gradients than southern and northern portions, especially in large areas of Pittsburg and Haskell counties where geothermal gradients in excess of 36 °C/km exist. These gradients suggest that temperatures suitable for low temperature geothermal power exist at depths of 2-3 km. Coals have very low thermal conductivity (0.15 – 0.5 W/m°K) acting as thermal insulators. This study examines the …
The Effect Of Teaching Biology Concepts With Animations Compared To Static Cartoons On Content Retention, Rebecca Adams Polk
The Effect Of Teaching Biology Concepts With Animations Compared To Static Cartoons On Content Retention, Rebecca Adams Polk
LSU Master's Theses
This study explores the effect of animations versus static cartoons on students’ content retention in a high school biology classroom. Students were pre-tested prior to the introduction of content in three units of study: cellular transport, protein synthesis, and mitosis. After instruction on the topic via PowerPoint presentations, students were randomly assigned to either the test group or experimental group for each unit. The control group was removed from the room and given a series of static cartoons with captions to view. The experimental group viewed an animation on the topic, accompanied by teacher narration, which consisted of the captions …
Simple And Fast Reconstruction Of 6 Mv Radiotherapy Doses To The Whole Body, Lydia Joyce Wilson
Simple And Fast Reconstruction Of 6 Mv Radiotherapy Doses To The Whole Body, Lydia Joyce Wilson
LSU Master's Theses
Background: State-of-the-art radiotherapy medical records include reliable estimates of the therapeutic radiation but are known to underestimate the stray radiation exposures by 40% away from the treatment field. Most commonly, stray radiation exposures are reconstructed using empirical formulas and/or lookup tables containing machine-specific dose measurements. The purpose of this study was to develop a physics-based model to calculate exposures to the whole body of patients who receive external beam photon radiotherapy. Methods: We developed a physics-based analytic algorithm to predict absorbed dose from therapeutic, scatter, and leakage radiation. The model includes separate terms to characterize photon production, attenuation, and scattering …
Effects Of Physicochemical Properties And Macrohabitat On The Foraging Ecology And Condition Of The Centrarchid Assemblage Of The Atchafalaya River Basin, Louisiana, Brett A. Miller
LSU Master's Theses
The Atchafalaya River Basin (ARB), Louisiana supports a diverse centrarchid assemblage, characterized by abundant populations of largemouth bass Micropterus salmoides, black crappie Pomoxis nigromaculatus, warmouth Lepomis gulosus, bluegill Lepomis macrochirus, redspotted sunfish Lepomis miniatus, longear sunfish Lepomis megalotis and redear sunfish Lepomis microlophus. This dynamic floodplain ecosystem is comprised of a mosaic of macrohabitats, including natural bayous, shallow lakes, dead-end and open pipeline canals. I conducted an extensive feeding ecology study to determine the influence of these macrohabitats on foraging activity through stomach content and stable isotope analyses. I collected 2,036 centrarchids with electrofishing efforts in the summers of 2011 …
Analysis Of The Cyclostratigraphy At The Devonian-Carboniferous Boundary In South-Central Oklahoma, Ryan Michael Todd Ellis
Analysis Of The Cyclostratigraphy At The Devonian-Carboniferous Boundary In South-Central Oklahoma, Ryan Michael Todd Ellis
LSU Master's Theses
An outcrop in La Serre, France, was officially ratified by the ICS in 1989, and the IUGS in 1990, as the location of the Global Boundary Stratotype Section and Point (GSSP) for the Famennian–Tournaisian, and subsequently the Devonian–Carboniferous (D–C) boundary. GSSPs, like this one, are official outcrops that provide physical representations of geologic time boundaries, essentially geological standards that define geologic time, providing a vital framework to model a variety of interpretations of geological phenomena from paleoclimate to paleontological. It has been acknowledged that the GSSP in La Serre, France is in need of revision due to fossil reworking and …
Implementing And Managing Self Assessment Procedures, Terry Leman Armstrong
Implementing And Managing Self Assessment Procedures, Terry Leman Armstrong
LSU Master's Theses
This study tests the hypothesis that implementing, managing and enhancing self-assessment procedures may improve learning. One hundred and fifty seven (157) financial math students in a high school with a predominantly at-risk population were divided randomly into an experimental group (self assessment and reflection) and a control group (traditional practice work). The experimental group performed significantly better than the control group (p = 0.02). The experimental group increased their scores from an average of 5.3 out of 18 correct on the pre-test to an average of 11 out of 18 correct on the post-test. The control group increased their scores …