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Articles 1651 - 1680 of 3417
Full-Text Articles in Physical Sciences and Mathematics
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 …
The Feasibility Of Using Vanadium And Nickel To Track Oil Spills In Coastal Environments, Sean Patrick Kenny
The Feasibility Of Using Vanadium And Nickel To Track Oil Spills In Coastal Environments, Sean Patrick Kenny
LSU Master's Theses
Crude oil has been increasing in world demand over the past century. It is known that oil is resistant to weathering processes and if spilled, can cause serious environmental damage to an area, on land or sea. A complementary approach to current methods of tracking oil and identifying spill-impacted sediments may be to measure trace metals associated with crude oil. Trace metals, such a vanadium (V) and nickel (Ni) are known to be elevated in concentration in some oil sources, but little work has been done on this topic. This research explored less expensive and time-consuming methods to track or …
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 …
Renewable Energy Across The 50 United States And Related Factors, Cynthia Brit Christenson
Renewable Energy Across The 50 United States And Related Factors, Cynthia Brit Christenson
LSU Master's Theses
Renewable energy production replaces diminishing non-renewable energy sources including fossil fuels. Major sources of renewable energy include biofuels, geothermal, hydroelectric, solar thermal and photovoltaic, wind, wood, and biomass. Greater use of renewable energy sources can fill gaps in energy as non-renewable sources are depleted, provide more energy independence at a state and national level, and help address climate change by reducing greenhouse gas emissions from combustion of fossil fuels. The research objectives of this thesis are two-fold. First, which U.S. states are leaders in renewable energy production? Second, what factors may account for variation among U.S. states in levels of …
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 …
The Effect Of Frequent Quizzing On Student Learning In A High School Physical Science Classroom, Courtney Bailey Norton
The Effect Of Frequent Quizzing On Student Learning In A High School Physical Science Classroom, Courtney Bailey Norton
LSU Master's Theses
This research explores the effects of frequent quizzing versus no quizzing in a high school Physical Science class. The study population included two freshman level Physical Science Honors classes. The content in this study included Classifying Matter, States of Matter, Atomic Bonding, Motion and Forces and Motion. For each chapter covered one class served as a control group, getting no quizzes, and the other class served as an experimental group, getting frequent quizzes. Prior to being taught information on the 5 chapters covered in this study, a 15-question pre-test was administered to the students. The information was delivered in the …
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 …
On The Long Duration Of Till Sheet Construction : A Reassessment Of How Quaternary Grounding Line Translations Relate To Near-Surface Seismic-Stratigraphy Of Eastern Ross Sea, Antarctica, Sydney Grace Bowles
On The Long Duration Of Till Sheet Construction : A Reassessment Of How Quaternary Grounding Line Translations Relate To Near-Surface Seismic-Stratigraphy Of Eastern Ross Sea, Antarctica, Sydney Grace Bowles
LSU Master's Theses
Previously acquired seismic surveys provide strong evidence that the post-Last Glacial Maximum (LGM) retreat of the West Antarctic Ice Sheet (WAIS) deposited a back-stepping succession of seismically-resolved grounding zone wedges (GZWs) in eastern Ross Sea. However, the chronology of WAIS retreat is debated. The conventional view is that three GZWs (Red, Brown, and Gray Units) were deposited since the LGM. An alternative view, based on recent radiocarbon dates, is that the youngest GZW (the Gray Unit) was deposited during the LGM. If correct, then the older GZWs (Red and Brown Units) were deposited prior to LGM. A recent study (Bart …
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 …
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 …
Bachman's Sparrow (Peucaea Aestivalis) Population Structure Across The Southeastern Usa, Blain Annette Cerame
Bachman's Sparrow (Peucaea Aestivalis) Population Structure Across The Southeastern Usa, Blain Annette Cerame
LSU Master's Theses
Understanding gene flow and population structure in wildlife populations helps managers to protect distinct genetic lineages and genetic variation in small, isolated populations at high risk of extinction. I assessed genetic diversity in Bachman’s Sparrows (Peucaea aestivalis) to evaluate the role of natural barriers in shaping evolutionarily significant units as well as the effect of anthropogenically-caused habitat loss and fragmentation on population differentiation and diversity. Genetic diversity was assessed across the geographic range of Bachman’s Sparrow by genotyping 226 individuals at 18 microsatellite loci and sequencing 48 individuals at nuclear and mitochondrial DNA genes. Multiple analyses consistently demonstrated high levels …
An Analysis Of The Prevalence Of The West Nile Virus In Relation To Health Resilience Along The Gulf Of Mexico, Lillian Patricia Mata
An Analysis Of The Prevalence Of The West Nile Virus In Relation To Health Resilience Along The Gulf Of Mexico, Lillian Patricia Mata
LSU Master's Theses
As the Earth’s climate changes, coastal communities are increasingly vulnerable to the natural hazards that are driven by these processes, particularly in regards to the health of these communities. It has been shown that disease patterns can change in response to our environment, putting the health resilience of communities at risk. This study looks at the relationship between natural exposure and traditional resilience index variables in the context of the spread of West Nile Virus along the Gulf of Mexico. Through analysis of 534 counties, the West Nile Virus for 2001-2012 was analyzed as an incidence and incidence rate at …
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 …
Characterization Of Epibenthic And Demersal Megafauan At Mississippi Canyon 252 Following The Deepwater Horizon Oil Spill, Marla Maxine Valentine
Characterization Of Epibenthic And Demersal Megafauan At Mississippi Canyon 252 Following The Deepwater Horizon Oil Spill, Marla Maxine Valentine
LSU Master's Theses
Increased demand for new sources of oil and gas has resulted in an expansion of drilling into deeper waters. With this exploratory drilling come increased risks, which were realized on April 20, 2010 when the blow out preventer on the Macondo Well failed, resulting in the release of a large quantity of oil and gas into the Northern Gulf of Mexico from a bathypelagic source. This unprecedented environmental disaster was coined the Deepwater Horizon Oil Spill by the popular news media. In the months that followed the spill, the lack of knowledge about the pre-spill condition of deep-sea communities in …
An Analysis Of Cardiovascular And Respiratory Admission Rates As A Function Of Air Pollutants In The Baton Rouge Five-Parish Area, Heather Elizabeth Spindel
An Analysis Of Cardiovascular And Respiratory Admission Rates As A Function Of Air Pollutants In The Baton Rouge Five-Parish Area, Heather Elizabeth Spindel
LSU Master's Theses
In past years, the Baton Rouge Air Quality Control Region has struggled with compliance of ozone standards. In June of 2003, the Baton Rouge Five-Parish Ozone Non-Attainment Area was classified as severe under the 1-hour ozone standard. In July of 2012, the EPA classified the area as marginal non-attainment for ozone. Although this is an improvement from its severe classification, studies have shown that health effects of air pollution can be detected at concentrations lower than the National Ambient Air Quality Standards. Additionally, clinical and epidemiological studies have shown that a majority of the criteria pollutants negatively affect cardiovascular and …
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 Analysis Of The Allocation Of Fema Public Assistance Funds Along The U.S. Gulf Coast Following Hurricanes Katrina, Rita, And Wilma, Pamela Camille Golden
An Analysis Of The Allocation Of Fema Public Assistance Funds Along The U.S. Gulf Coast Following Hurricanes Katrina, Rita, And Wilma, Pamela Camille Golden
LSU Master's Theses
Due to the effects of global climate change, natural disasters such as hurricanes are increasing in terms of both intensity and frequency. During the record-breaking hurricane season of 2005, Hurricanes Katrina, Rita, and Wilma struck the U. S. Gulf Coast, affecting areas from Texas to Florida and causing billions of dollars in damage. This study examines the allocation of FEMA Public Assistance across the affected Gulf of Mexico states, what factors account for variation in in assistance allocation, what are the priorities for recovery among county leaders and what obstacles they have encountered since 2005. This study includes 136 counties …
Population Ecology Of The Ribbed Mussel In Southeastern Louisiana, Aaron Jacob Honig
Population Ecology Of The Ribbed Mussel In Southeastern Louisiana, Aaron Jacob Honig
LSU Master's Theses
Benthic intertidal bivalves play an essential role in estuarine ecosystems by contributing to habitat provision, water filtration, and promoting productivity. As such, ecosystem level changes that impact population distributions and persistence of local bivalve populations may have large ecosystem level consequences, making it important to better understand the population distribution and ecology of native bivalve populations. Gametogenesis, recruitment, growth, mortality, size structure and density of the ribbed mussel, Geukensia demissa, were examined across a salinity gradient in southeastern Louisiana. In summer 2012, 100-m transects were placed at interior and edge marsh plots to collect data on mussel density, and vegetation …
Impacts Of Artificial Reef Addition On The Nekton Community Of Louisiana Marsh Ponds: A Before-After-Control-Impact Analysis, Kari Elizabeth Klotzbach
Impacts Of Artificial Reef Addition On The Nekton Community Of Louisiana Marsh Ponds: A Before-After-Control-Impact Analysis, Kari Elizabeth Klotzbach
LSU Master's Theses
Louisiana’s coastal estuaries are dynamic, highly variable environments that provide nursery areas for numerous recreationally and commercially important species. Louisiana’s coastline is constantly changing due to natural and anthropogenic processes, and it is important to know how nektonic species are impacted by such changes. This study sought to assess the effects of introducing a hard substrate artificial reef on the nekton community of a Louisiana estuary. A before-after-control-impact (BACI) design was used to assess the impacts of artificial reef addition on nektonic fishes and crustaceans in four shallow marsh ponds near Empire, Louisiana. Marsh ponds were sampled by purse seine …
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 …
Advancing The Field Of Polypeptoids Through The Synthesis Of Novel Architectures And Thermoresponsive Polymers, Samuel Henry Lahasky
Advancing The Field Of Polypeptoids Through The Synthesis Of Novel Architectures And Thermoresponsive Polymers, Samuel Henry Lahasky
LSU Doctoral Dissertations
Peptidomimetic polymers are an emerging class of polymers that are structurally related to polypeptides. Due to their structural similarities, these polymers can be used to study some of the physical aspects of polypeptides (for example, protein folding). They are also increasingly being used in the fields of biology and drug-delivery. Some members of peptidomimetic polymers include polyacrylamides, polyoxazolines and polypeptoids. Polymer synthesis and characterization has been performed for both polyacrylamides and polyoxazolines, with research dating back to the 1950s and 1980s respectively. Research in the field of polypeptoids has not been as extensive; however, emerging synthetic strategies are allowing for …
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 …
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 …
A Hybrid Framework Of Iterative Mapreduce And Mpi For Molecular Dynamics Applications, Shuju Bai
A Hybrid Framework Of Iterative Mapreduce And Mpi For Molecular Dynamics Applications, Shuju Bai
LSU Doctoral Dissertations
Developing platforms for large scale data processing has been a great interest to scientists. Hadoop is a widely used computational platform which is a fault-tolerant distributed system for data storage due to HDFS (Hadoop Distributed File System) and performs fault-tolerant distributed data processing in parallel due to MapReduce framework. It is quite often that actual computations require multiple MapReduce cycles, which needs chained MapReduce jobs. However, Design by Hadoop is poor in addressing problems with iterative structures. In many iterative problems, some invariant data is required by every MapReduce cycle. The same data is uploaded to Hadoop file system in …
Depositional History Of The Trinity-Tiger Shoals Region : A Transgressed Delta Complex Of The Middle Holocene Mississippi Delta, Clint Hoyt Edrington
Depositional History Of The Trinity-Tiger Shoals Region : A Transgressed Delta Complex Of The Middle Holocene Mississippi Delta, Clint Hoyt Edrington
LSU Doctoral Dissertations
The Holocene Mississippi River Delta is arguably the world’s most thoroughly researched deltaic system. However, much of this research has occurred predominantly within the present-day subaerial delta, whereas comparatively little research has been attempted downdip within the offshore, more difficult-to-reach parts. This study advances our understanding of the Holocene delta by examining deltaic sediments within the Trinity-Tiger Shoals Complex region, located ~ 30 – 40 km offshore of central Louisiana. Specifically, this study addresses two questions. Which delta complex prograded into this offshore region? Do the overlying transgressive deposits reflect that predicted by the prevailing transgressive depositional systems model? To …
Fluorescent Materials For Chemical Sensing, Brian Gerard Imsick
Fluorescent Materials For Chemical Sensing, Brian Gerard Imsick
LSU Doctoral Dissertations
Materials incorporating fluorescent π-electron conjugated molecular species for sensing and imaging are advantageous over other detection or identification methods such as colorimetric reporters. Fluorescent materials offer easy recognition of binding events due to the highly sensitive nature of fluorescence techniques down to the single molecule level. The properties of fluorescent molecules allow for rapid attenuation of observable readout due to the facile transport of excited state energy via both inter- and intramolecular pathways. This dissertation primarily focused on the development and study of a general platform for ratiometric fluorescent chemosensing using surface-immobilized oligomers, as well as in depth explorations of …
Exploring The Learnability Of Numeric Datasets, Di Lin
Exploring The Learnability Of Numeric Datasets, Di Lin
LSU Doctoral Dissertations
When doing classification, it has often been observed that datasets may exhibit different levels of difficulty with respect to how accurately they can be classified. That is, there are some datasets which can be classified very accurately by many classification algorithms, and there also exist some other datasets that no classifier can classify them with high accuracy. Based on this observation, we try to address the following problems: a)what are the factors that make a dataset easy or difficult to be accurately classified? b) how to use such factors to predict the difficulties of unclassified datasets? and c) how to …
Luminescence Studies : Part I. Lanthanide Nanogumbos Part Ii. Near Infrared Photothermal Nanogumbos, Jonathan Carver Dumke
Luminescence Studies : Part I. Lanthanide Nanogumbos Part Ii. Near Infrared Photothermal Nanogumbos, Jonathan Carver Dumke
LSU Doctoral Dissertations
Group of Uniform Materials Based on Organic Salts (GUMBOS) are a class of molten salts that have been focused to be specifically tailored towards applications. Primitively, from Davy to Walden molten salts were desirable for organic synthesis due to the properties. GUMBOS have been synthesized into nanoparticles (nanoGUMBOS) by various methods to be used for lanthanide luminescence and hyperthermal cancer therapeutics. Lanthanide photochemistry has been frequently studied for its high luminescence intensity, narrow emission band, and stable luminescent lifetime decay. Aerosol-derived europium nanoGUMBOS were characterized using electron microscopy (39.5 ± 8.4 nm), XPS, and spectroscopic techniques. Spectroscopic measurements indicated intense …