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Articles 1831 - 1860 of 3417
Full-Text Articles in Physical Sciences and Mathematics
Spatial Variation Analysis Of Salinity To Determine Fluid Flow Pathways And Reservoir Compartmentalization In A Deepwater Gulf Of Mexico Field, William Jacob Daugherty
Spatial Variation Analysis Of Salinity To Determine Fluid Flow Pathways And Reservoir Compartmentalization In A Deepwater Gulf Of Mexico Field, William Jacob Daugherty
LSU Master's Theses
Variations in salinity have been documented in previous studies onshore Louisiana in the Wilcox group (Funayama and Hanor 1995) as well as offshore Louisiana on the continental shelf (Bruno and Hanor 2003 and Steen et al. 2011). These studies were conducted using various methods to estimate pore water salinity and make inferences about possible fluid flow pathways and compartmentalization of reservoirs in order to better understand the complex hydrogeology of the Gulf of Mexico. Similar variations in salinity were documented in this study located in a deepwater salt withdrawal minibasin located on the upper slope of the Gulf of Mexico. …
The Effect Of Extrinsic Rewards In The High School Classroom, Amanda Vargo
The Effect Of Extrinsic Rewards In The High School Classroom, Amanda Vargo
LSU Master's Theses
One of the biggest obstacles that a high school teacher faces in the classroom is motivating students to complete work. Traditional ideology focuses on intrinsic rewards as way to encourage students to participate and try in the classroom. Things like valuing education, planning for college, and taking pride in a good report card are used in attempts to motivate. Yet, in the adult world, people expect a concrete extrinsic reward (i.e. a paycheck) for the work that they do. This study takes the idea of extrinsic rewards and brings them into the classroom. This study was conducted over two academic …
Skill Assessment And Optimization Of The Third Generation Wave Models For Applications In Gulf Of Mexico, Seyed Mostafa Siadatmousavi
Skill Assessment And Optimization Of The Third Generation Wave Models For Applications In Gulf Of Mexico, Seyed Mostafa Siadatmousavi
LSU Doctoral Dissertations
Numerical phase-averaged wave models are the best option to obtain the spatial and temporal distribution of the wave energy over a large domain, such as the Gulf of Mexico. Parallel implementation of unstructured SWAN and WAVEWATCH-III were engaged in this research to evaluate the performance of third generation wave models for different conditions. Met-ocean data from a network of NDBC buoys and WAVCIS stations were used to assess the predictive skills of the wave models. Deep water wave energy dissipation formulations were carefully analyzed and modified to improve the accuracy of the bulk wave parameters. Moreover, the importance of the …
Searches For Gravitational Waves From Perturbed Black Holes In Data From Ligo Detectors, Sarah Elizabeth Caudill
Searches For Gravitational Waves From Perturbed Black Holes In Data From Ligo Detectors, Sarah Elizabeth Caudill
LSU Doctoral Dissertations
Black hole perturbation theory predicts that a perturbed black hole will emit gravitational waves in a superposition of quasi-normal modes. Various astrophysical processes can produce such a black hole including the merger of two compact binary neutron stars or black holes. The final form of the waveform from such a system is known as a ringdown. We discuss the search through data from LIGO's fifth science run for ringdown gravitational waves from intermediate mass black holes using a matched filtering pipeline. We outline the improvements to the pipeline since LIGO's fourth science run including the creation of a fully automated …
A Study Of Measurement In The Algebra I Classroom, Ni'shawn Leneigh Stovall
A Study Of Measurement In The Algebra I Classroom, Ni'shawn Leneigh Stovall
LSU Master's Theses
ABSTRACT The purpose of this research was to supplement and reorganize the existing Unit 7: Measurement of the East Baton Rouge Parish School System Comprehensive Curriculum (EBRCC) to improve student performance. To restructure the unit, I analyzed the Measurement Standards outlined in both the Common Core Standards and the National Council of Teachers of Mathematics. I also studied the existing structure of the unit to reorganize the topics in a manner that is more succinct and effective in promoting student learning. In addition to reorganizing the unit, I also implemented my own supplements over the three week period. To determine …
Do Learning Logs Have An Impact On The Conceptual Mastery Of Force And Motion?: Subtitle, John Arthur Underwood
Do Learning Logs Have An Impact On The Conceptual Mastery Of Force And Motion?: Subtitle, John Arthur Underwood
LSU Master's Theses
This two-week study was conducted to investigate the impact Learning Logs have on student conceptual mastery of force, motion, and kinematics. To begin the study a sample of 554 ninth grade students were selected from a suburban public school in Louisiana. The students were randomly divided into experimental and control groups within four teachers’ classrooms. This distribution was to examine the impact of Learning Logs regardless of the teaching style or time of day. Upon the study’s conclusion there was no significant differences noted due to teaching style or time of day. The Force Motion Concept Evaluation (FMCE) was used …
Longitudinal Assessment Of Shifting Microbial Community Composition In Sandy Beaches Following The 2010 Deepwater Horizon Oil Spill And Remediation Efforts, Axita Ajaykumar Gupta
Longitudinal Assessment Of Shifting Microbial Community Composition In Sandy Beaches Following The 2010 Deepwater Horizon Oil Spill And Remediation Efforts, Axita Ajaykumar Gupta
LSU Master's Theses
Sandy beaches are geological zones parallel to the shoreline where high energy, open ocean unconsolidated sediments are deposited and reworked. Sandy beaches represent critical ecosystems that support a wide variety of underappreciated biodiversity. Prior to the 2010 Deepwater Horizon oil spill in the Gulf of Mexico, the diversity and function of microbial communities in supratidal beach sediments along the Gulf of Mexico coastlines were not well understood. It was unclear if possible community compositional changes would occur during and following exposure to oil, or what impact the remediation efforts, such as sand washing, would have to the microbial communities and …
Pah Concentrations Found Within Gulf Menhaden (Brevoortia Patronus) Populations Located Off Of The South/Southeast Coast Of Louisiana, Gregory Michael Olson
Pah Concentrations Found Within Gulf Menhaden (Brevoortia Patronus) Populations Located Off Of The South/Southeast Coast Of Louisiana, Gregory Michael Olson
LSU Master's Theses
In April 2010, large quantities of crude oil were released into the Gulf of Mexico (GoM) raising questions about the possible contamination of marine organisms with constituents of concern known as Polycyclic Aromatic Hydrocarbons (PAHs). In order to determine the impact of the Deepwater Horizon (DWH) crude oil spill, Gulf menhaden (Brevoortia patronus) were harvested from two coastal regions of Louisiana. Tissue analysis to determine total PAH concentration was conducted using an adapted matrix solid phase dispersion (MSPD) method; a Soxhlet extraction process was used to determine fish oil to mass ratios for “small” (fork length < 16 cm) and “large” (fork length > 16 cm) menhaden. Menhaden …
Using A Collaborative Inquiry Process And Data To Affect Curriculum In An Independent School, Sheri Lyn Pastor Goings
Using A Collaborative Inquiry Process And Data To Affect Curriculum In An Independent School, Sheri Lyn Pastor Goings
LSU Master's Theses
Literature clearly supports the use of data to support and drive school policy. Data can be immensely informative; however test scores are not the sole indicator of school effectiveness. To successfully implement a plan for data use, it is imperative to a provide climate of teacher buy-in and collaboration. Multiple sources of data should be considered collectively prior to making any judgment(s) about students, teachers, curriculum, or schools. Data use for effective decision-making is an on-going process that requires strategic planning and a long-term commitment. Over the past year, I have led the math department through a modified version of …
Design Of Electron Dual Foil Scattering Systems For Elekta Infinity Radiotherapy Accelerators, Justin Deloy Leblanc
Design Of Electron Dual Foil Scattering Systems For Elekta Infinity Radiotherapy Accelerators, Justin Deloy Leblanc
LSU Master's Theses
Purpose: To design a dual foil scattering system within Elekta Infinity radiotherapy accelerator constraints that results in clinical electron beams that meet flatness criteria of ±3% (±4%) along its principal axes (diagonal axes) for the 25x25cm2 applicator and most probable surface energies of 7-20 MeV (1 MeV increments). Methods: An analytical electron dual scattering foil system simulator was commissioned and verified using Monte Carlo (MC) simulations. Verification required comparing analytical simulator with MC-calculated electron fluence profiles for identical geometries: (1) only primary foil and (2) both primary and secondary foils in the beam. Also, simulator-calculated bremsstrahlung dose was validated by …
Synthesis Of Fluorescent Poly(Styrene Sulfonate), Wayne Alfred Huberty
Synthesis Of Fluorescent Poly(Styrene Sulfonate), Wayne Alfred Huberty
LSU Master's Theses
In 1978, Lee found an increase and then a large decrease in the diffusion coefficient of poly(lysine) as the concentration of salt is decreased (Lin, S. C.; Lee, W. I.; Schurr, J. M. Biopolymers 1978, 17, (4), 1041-1064). Since the “slow mode” discovery, many have studied it without finding a fully satisfactory answer. Additional dynamic light scattering (DLS) measurements have been the main experimental technique used for reinvestigating the slow mode decay. Although DLS is a powerful characterization tool, it depends on thermodynamic interactions. As complicated as they can be, thermodynamic interactions are much worse for polyelectrolytes because of the …
Louisiana's Suitability For A Low-Level Radioactive Waste Storage Facility, Charles Algeo Wilson
Louisiana's Suitability For A Low-Level Radioactive Waste Storage Facility, Charles Algeo Wilson
LSU Master's Theses
Radioactive waste is an inevitable outcome of using radioactive elements in research, education, medicine, energy, and weapons production. Low-level waste (LLW) makes up 85% of the radioactive waste produced in the United States. In 2010, over 2 million ft3 of LLW were shipped to disposal sites. Despite efforts from several states and government agencies, the options for disposing of LLW are very limited. It is the intention of this project to design a GIS based method to determine suitability of potential disposal sites based on the Code of Federal Regulations (CFR) requirements and criteria as well as supporting literature and …
Mathematical Models For Interest Rate Dynamics, Xiaoxue Shan
Mathematical Models For Interest Rate Dynamics, Xiaoxue Shan
LSU Master's Theses
We present a study of mathematical models of interest rate products. After an introduction to the mathematical framework, we study several basic one-factor models, and then explore multifactor models. We also discuss the Heath-Jarrow- Morton model and the LIBOR Market model. We conclude with a discussion of some modified models that involve stochastic volatility.
Neutrino Data Analysis Using The Side Muon Range Detector (Smrd) Of The Tokai To Kamiokande (T2k) Long Baseline Neutrino Experiment, Jeremiah John Haremza
Neutrino Data Analysis Using The Side Muon Range Detector (Smrd) Of The Tokai To Kamiokande (T2k) Long Baseline Neutrino Experiment, Jeremiah John Haremza
LSU Master's Theses
In this thesis we describe data quality considerations for the Side Muon Rang Detector (SMRD), one of the six sub-detectors of the ND280 near detector of the Tokai to Kamiokande (T2K) long baseline neutrino oscillation experiment. Herein we show that the data quality of the SMRD has taken good data 99.9584% of the time it has been recording data. Also, 99.676% of SMRD data channels are shown to be operating optimally. In addition we discuss the stability of the SMRD. We _x000C_find that based on a subset of data unbiased cosmic triggers have light yield of 112.8 +/- 0.3 p.e. …
Object Protocols As A Tool For Debugging Method Call Sequencing Constraints, Ronald William Gilkey
Object Protocols As A Tool For Debugging Method Call Sequencing Constraints, Ronald William Gilkey
LSU Master's Theses
Clearly conveying and enforcing the proper ordering of method calls on objects has become a common problem among developers and interface designers. Without the ability of the compilation environment to enforce these constraints, programmers must rely on clear documentation being provided and diligence in programming to ensure that a proper sequence of operations is performed. Commonly, though, type-checking becomes the only tool to help support the correctness of operation sequences as API documentation rarely describes inter-object communications. Thus, the likeliness of producing erroneous and buggy software increases. Object protocols provide a simple and straight-forward approach to solving this problem. They …
The Context Of Public Acceptance Of Hydraulic Fracturing: Is Louisiana Unique?, Crawford White
The Context Of Public Acceptance Of Hydraulic Fracturing: Is Louisiana Unique?, Crawford White
LSU Master's Theses
Hydraulic fracturing has received increased attention over the past decade. The rapid adoption of this technique coupled with accurate directional horizontal drilling has unlocked several US shale formations. Amid the possibility of 100% domestically sourced natural gas, public perception varies and opponents question the long-term risks and repercussions of the technique. This thesis will provide context to some of the variation seen in the public perception of hydraulic fracturing among three states: Louisiana, Pennsylvania, and Texas. Two surveys of Louisiana stakeholders were conducted in order to rank the state in terms of acceptance amongst previously conducted surveys of its two …
Evaluation Of A Proton Pencil Bean Algorithm For Dose Calculations In Heterogenous Media, Nels C. Knutson
Evaluation Of A Proton Pencil Bean Algorithm For Dose Calculations In Heterogenous Media, Nels C. Knutson
LSU Master's Theses
Purpose: To develop an improved nuclear halo dose model of a pencil beam algorithm (PBA) for dose calculation of proton beams in heterogeneous media. Methods: The proton PBA consisted of a central axis term and an off axis term. The central axis term was determined from a central axis depth dose profile of a Monte Carlo simulated proton beam in water and was scaled by a mass stopping power ratio to account for other materials. The off axis term was determined from Fermi-Eyges scattering theory with material-dependent scattering powers to calculate the lateral spread of the proton beam in heterogeneous …
Design And Analysis Of Peer 2 Peer Operating System, Anudeep Meka
Design And Analysis Of Peer 2 Peer Operating System, Anudeep Meka
LSU Master's Theses
The peer to peer computing paradigm has become a popular paradigm for deploying distributed applications. Examples: Kadmelia, Chord, Skype, Kazaa, Big Table. Multiagent systems have become a dominant paradigm within AI for deploying reasoning and analytics applications. Such applications are compute-intensive. In disadvantaged networks the ad-hoc architecture is the most suitable one. Examples: military scenarios, disaster scenarios. We combine the paradigms of peer-to-peer computing, multiagent systems, cloud computing, and ad-hoc networks to create the new paradigm of ad-hoc peer-to-peer mobile agent cloud (APMA cloud) that can provide the computing power of a cloud in “disadvantaged” regions (e.g., through RF using …
A High-Resolution Palynological Analysis Of The St. Stephens Quarry, Alabama: Locating The Eocene-Oligocene Boundary And Characterizing The Environmental Changes Across The Margin, Kevin Jensen
LSU Master's Theses
The Eocene-Oligocene (E-O) transition is a key interval in geological history because it marks a major change in Earth’s climate and because these strata are also popular oil targets in the Gulf Coast. E-O sequences in Alabama are stratigraphically complex. The St. Stephens Quarry (SSQ) in Alabama is one of the few accessible quarries along the Gulf Coast where the E-O boundary is visible in outcrop. Despite the abundance of research projects conducted in the SSQ, many controversies still surround the E-O boundary placement and correlation to the Global Stratotype in the Massignano section in Italy that is based on …
Proton Dose Calculations In Homogeneous Media, John Wesley Chapman, Jr.
Proton Dose Calculations In Homogeneous Media, John Wesley Chapman, Jr.
LSU Master's Theses
In this study, a proton pencil beam dose calculation algorithm was developed for a parallel, monoenergetic beam incident on a homogeneous water phantom. Fermi-Eyges theory (Eyges 1948) was used to transport pencil beams, and the characteristic width of elastic scatter events was modeled using the differential Moliere scattering power (Gottschalk 2010). The incorporation of this scattering power formalism allowed our model to account for multiple Coulomb scattering, single scattering, plural scattering, and rigorously accounted for material effects on scatter. Nonelastic nuclear interactions were incorporated into an additional pencil beam model. The attenuation of primary fluence due to nuclear events was …
Educational Looping And Retention In The Middle School Setting, Mary Elizabeth Feighery
Educational Looping And Retention In The Middle School Setting, Mary Elizabeth Feighery
LSU Master's Theses
Educational looping is an educational method where teachers remain with the same core group of students over multiple academic years. The current research on this topic shows a strong positive correlation between the effects of looping and the growth of personal relationships between students and teachers, but neglects to examine the connection between looping and student educational growth. This paper explores the relationship between looping and academic gains, as well as between looping and retention of content material over time. This paper explores both the relationship between looping and academic gains and between looping and retention of content material, and …
Opportunistic Lookahead Routing Procedure For Delay Tolerant Networks, Priyanka Rotti
Opportunistic Lookahead Routing Procedure For Delay Tolerant Networks, Priyanka Rotti
LSU Master's Theses
Delay Tolerant Networks are wireless networks that have sporadic network connectivity, thus rendering the existence of instantaneous end-to-end paths from a source to a destination difficult or impossible. Hence, in such networks, message delivery relies heavily on the store-and-forward paradigm to route messages. However, limited knowledge of the contact times between the nodes poses a big challenge to effective forwarding of messages. In this thesis, we discuss several aspects of routing in DTNs and present one algorithm and three variants for addressing the routing problem in DTNs: (i) the Look-ahead Protocol, in which the forwarding decision at each node to …
A Numerical Investigation Of Apéry-Like Recursions And Related Picard-Fuchs Equations, Maiia J. Bakhova
A Numerical Investigation Of Apéry-Like Recursions And Related Picard-Fuchs Equations, Maiia J. Bakhova
LSU Doctoral Dissertations
In this work we investigate a generalization of a recursion which was used by Apery in his proof of irrationality of the zeta function values at 2 and 3. It is a continuation of the work of Zagier , who considered generalization of the first equation and numerically investigated it. The study is made for two generalizations of the second equation, one used the mirror symmetry idea from the theory of Calabi-Yau varieties and another worked with recursion. There were discovered connections between them.
U-Pb Geochronology Of Detrital Zircon In Quartzites Of The Sawtooth Metamorphic Complex, Sawtooth Range, Idaho, Usa, Philip Gerard Bergeron
U-Pb Geochronology Of Detrital Zircon In Quartzites Of The Sawtooth Metamorphic Complex, Sawtooth Range, Idaho, Usa, Philip Gerard Bergeron
LSU Master's Theses
In southwest Laurentia, the Paleoproterozoic Selway terrane has been proposed to extend as basement from the Wyoming Province to the Proterozoic rifted margin of Laurentia primarily based on limited exposures. The Sawtooth Metamorphic Complex (SMC), Idaho, a series of high-grade metasupracrustal rocks lies within the proposed region of the Selway terrane and may represent remnants of this terrane. Alternatively, it may represent another basement terrane of cratonic North America. To test the hypothesis that the SMC belongs to the Selway terrane, detrital zircon U/Pb ages of five quartzite samples were analyzed by LA-ICP-MS to establish age, possible provenance, and age …
Effect Of Instructional Methodologies On Student Achievement Modeling Instruction Vs. Traditional Instruction, Jacqueline Grace Barker
Effect Of Instructional Methodologies On Student Achievement Modeling Instruction Vs. Traditional Instruction, Jacqueline Grace Barker
LSU Master's Theses
ABSTRACT Different teaching styles can impact student learning in many ways. The purpose of this study was to determine the effectiveness of Modeling Instruction on student achievement in a high school Chemistry course. Different tests were used to compare the data at the beginning of a school year and at the end of the school year. The tests used were to determine gains in chemistry content knowledge, abilities to reason scientifically, and attitudes about learning chemistry. The control group was taught by traditional instruction through the use of lecture, note-taking, and textbook guided assignments. The experimental group was taught by …
Modeling Gopher Tortoise (Gopherus Polyphemus) Habitat In A Fire-Dependnent Ecosystem In North Florida, Christina Legleu
Modeling Gopher Tortoise (Gopherus Polyphemus) Habitat In A Fire-Dependnent Ecosystem In North Florida, Christina Legleu
LSU Master's Theses
Gopher tortoise (Gopherus polyphemus) populations have declined with longleaf pine (Pinus palustris) ecosystems across their historic range. The influence of gopher tortoise burrows on co-inhabiting plants and animals necessitates an understanding of how landscape features and management practices influence gopher tortoise presence, absence, and abandonment. In this study, naïve gopher tortoise burrow encounter rates from a line transect distance sampling (LTDS) pilot study were used for two methods of modeling gopher tortoise habitat. In Chapter 1, naïve encounter rates were tested for a linear correlation to a HSI model created from three ranked geographic information system (GIS) landscape variables. Initial …
An Analysis Of Change In Policy Context Regarding Corexit Dispersant Use Following The Deepwater Horizon Oil Spill, Kelly Arceneaux
An Analysis Of Change In Policy Context Regarding Corexit Dispersant Use Following The Deepwater Horizon Oil Spill, Kelly Arceneaux
LSU Master's Theses
On April 20, 2010, an explosion on the offshore drilling platform Deepwater Horizon located in the Gulf of Mexico resulted in the largest oil spill in U.S. history. The subsequent use of massive amounts of chemical dispersants near the Gulf floor, an untested method, led to great controversy regarding the regulation, use, and toxicity of dispersants of the COREXIT family of products, as well as of dispersants in general. This study compares dispersant (COREXIT brand products in particular) regulation and use in the United States, Norway and the United Kingdom; the latter two countries are among the largest oil producers …
Investigation Of Colored Dissolved Organic Matter And Dissolved Organic Carbon Using Combination Of Ocean Color Data And Numerical Model In The Northern Gulf Of Mexico, Nazanin Chaichitehrani
Investigation Of Colored Dissolved Organic Matter And Dissolved Organic Carbon Using Combination Of Ocean Color Data And Numerical Model In The Northern Gulf Of Mexico, Nazanin Chaichitehrani
LSU Master's Theses
The first part of this thesis includes evaluating and developing empirical band ratio algorithms for the estimation of colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) for SeaWiFS, MODIS and MERIS ocean color sensors for the northern Gulf of Mexico. For CDOM, matchup comparison between SeaWiFS-derived CDOM absorption coefficients and in situ absorption measurements at 412 nm (aCDOM(412)) were examined using the D’Sa et al. (2006) and the Mannino et al. (2008) algorithms. These reflectance band ratio algorithms were also assessed to retrieve aCDOM(412) from MODIS and MERIS data using the Rrs(488)/Rrs(555) and Rrs(510)/Rrs(560) band ratios, respectively. Since …
Effects Of Mimic Artificial Oyster Reefs On The Ecology Of Juvenile Fishes In Marsh Ponds: A Before-After-Control-Impact Analysis, Steven B. Garner
Effects Of Mimic Artificial Oyster Reefs On The Ecology Of Juvenile Fishes In Marsh Ponds: A Before-After-Control-Impact Analysis, Steven B. Garner
LSU Master's Theses
I sought to assess the enhancement potential of mimic artificial oyster reefs (MAORs) on trophic dynamics of juvenile estuarine fishes in marsh ponds. Tropic dynamics were investigated by determining the impacts of MAOR addition on meiofauna and macrofauna and then comparing these results to the gut contents and condition of four abundant estuarine fishes: Atlantic croaker (Micropogonias undulatus), bay whiff (Citharichthys spilopterus), sand seatrout (Cynoscion arenarius), and pinfish (Lagodon rhomboides). Samples were collected every other month for two years (March 2009 – 11) employing a Before-After-Control-Impact (BACI) design. Halfway through the experiment (March 2010), two mud sites in two marsh …
Thermal And Pore Pressure History Of The Haynesville Shale In North Louisiana: A Numerical Study Of Hydrocarbon Generation, Overpressure, And Natural Hydraulic Fractures, William C. Torsch
Thermal And Pore Pressure History Of The Haynesville Shale In North Louisiana: A Numerical Study Of Hydrocarbon Generation, Overpressure, And Natural Hydraulic Fractures, William C. Torsch
LSU Master's Theses
New drilling technology has led to a revival of drilling in mature petroleum basins such as the Haynesville Formation in east Texas and north Louisiana. In north Louisiana, the Upper Jurassic (Kimmeridgian) aged Haynesville shale has a basinward SW dip and is located at depths ranging from around 10,500 ft to the northeast and 14,000 ft to the southwest with local minimums at the Sabine and Monroe Uplifts. Formation thickness ranges from 100 to 400 feet. Prolific natural gas production is attributed to relatively high average porosity (8 to 14%) and a high geopressure gradient > 0.9 psi/ft. (Wang and Hammes, …