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Articles 21031 - 21060 of 24474
Full-Text Articles in Entire DC Network
Comparison Of Advanced Radiotherapy Techniques For Post-Mastectomy Breast Cancer Patients, David Elward Heins
Comparison Of Advanced Radiotherapy Techniques For Post-Mastectomy Breast Cancer Patients, David Elward Heins
LSU Master's Theses
Purpose: To determine if bolus electron conformal therapy (BECT) combined with volumetric modulated arc therapy (VMAT) and flattening filter free volumetric modulated arc therapy (FFFVMAT (6x and 10x)) can maintain equal or better dose coverage than standard volumetric modulated arc therapy (VMAT) while reducing doses to organs at risk (OARs). Methods: BECT+VMAT, FFFVMAT (6x and 10x), and VMAT treatment plans were produced for ten post-mastectomy radiotherapy (PMRT) patients previously treated at our clinic. The treatment plans were created on a commercially available treatment planning system (TPS) and all completed treatment plans were reviewed and approved by a radiation oncologist. The …
Sudden Appearance Of Indurated Erythematous Plaques On A Man's Face, Adam Carter, Karthikeyan Viswanathan, Kenneth Shulman
Sudden Appearance Of Indurated Erythematous Plaques On A Man's Face, Adam Carter, Karthikeyan Viswanathan, Kenneth Shulman
NYMC Student Publications
Rosacea fulminans (RF), previously known as pyoderma faciale, is a rare presentation of rosacea mostly seen in young women. RF is seen very rarely in men. We present below a case of a fifty-year-old male who presented with RF and was successfully treated with a combination of corticosteroids and isotretinoin.
The Role Of Upper Ocean Heat Content And Sea Surface Temperature On Northeast Pacific Hurricane Evolution During Average And Active Years, Victoria Lauren Ford
The Role Of Upper Ocean Heat Content And Sea Surface Temperature On Northeast Pacific Hurricane Evolution During Average And Active Years, Victoria Lauren Ford
LSU Master's Theses
Upon comparison to typical neutral-ENSO conditions in the Northeast Pacific Ocean, the 2014 hurricane season has been identified as highly anomalous in both tropical cyclone frequency and intensity. This thesis seeks to investigate the influence of sea surface temperatures (SSTs) and upper ocean heat content (UOHC), defined as the excess of heat present above 26°C, upon the upper ocean thermal structure, mesoscale features, and anomalies that led to an active hurricane season in the Northeast Pacific. The 2012 Northeast Pacific hurricane season was selected as a ‘normal’ season to fully quantify the anomalous 2014 hurricane season. Data sets utilized in …
Investigating Species And Population Level Foraging Variation And Individual Specialization In Pygoscelis Penguins Using Stable Isotope Analysis, Rachael W. Herman
Investigating Species And Population Level Foraging Variation And Individual Specialization In Pygoscelis Penguins Using Stable Isotope Analysis, Rachael W. Herman
LSU Master's Theses
Gentoo Penguins (Pygoscelis papua) are known to be generalist foragers, while Adélie (P. adeliae) and Chinstrap (P. Antarctica) tend to specialize on krill within the Western Antarctic Peninsula and South Shetland Islands, particularly during the breeding season. However, little is known on temporal consistency in diet and foraging habitat of these species, particularly at the individual level. We used stable isotope analysis (SIA) of blood and feathers to evaluate seasonal and individual foraging consistency within Adélie, Chinstrap and Gentoo Penguins breeding in the South Shetland Islands, as well as among three Gentoo Penguins’ populations in the Western Antarctic Peninsula and …
Building A Community Of Writers Through Free Writing, Reflection, And Collaboration, Adrienne Renee Tate
Building A Community Of Writers Through Free Writing, Reflection, And Collaboration, Adrienne Renee Tate
LSU Master's Theses
This teacher-research project was implemented into a sophomore English Language Arts classroom in order to examine free writing as a writing strategy to encourage students’ interactions and cultivate community. The researcher wanted to discover if free writing was a strategy English teachers can implement to encourage collaboration and community amongst his or her students. This study was conducted approximately for one semester in an English II honors class in southern region of the United States. This project used a mixed-methods approach to determine if free writing is a strategy to encourage students’ interactions and cultivate community. To determine the effectiveness …
An Assessment Of The Economic Feasibility Of Establishing A Biofuel Industry In The State Of Louisiana, Alessandro Holzapfel
An Assessment Of The Economic Feasibility Of Establishing A Biofuel Industry In The State Of Louisiana, Alessandro Holzapfel
LSU Master's Theses
As national interests continue to encourage the development of advanced cellulosic biofuels, through legislation, research support and other means, a wide range of alternative agricultural crops are being evaluated in various regions of the country as potential feedstock material for biofuel processing facilities. Previous research has shown that both energy cane and sweet sorghum can be successfully grown in Louisiana. This study evaluated the economic feasibility of utilizing energy cane and sweet sorghum as biofuel feedstock crops. Economic analysis focused on two primary factors: estimation of feedstock cost and optimal location of processing facilities. Five cropping sequences were evaluated in …
Study Of Resistivity And Shear Wave Velocity As A Predictive Tool Of Sediment Type In Levee Foundation Soils, Louisiana Gulf Coast Levee System, Derek Stephen Goff
Study Of Resistivity And Shear Wave Velocity As A Predictive Tool Of Sediment Type In Levee Foundation Soils, Louisiana Gulf Coast Levee System, Derek Stephen Goff
LSU Master's Theses
Geotechnical sediment type of levee foundation soils may be estimated by using cross-plots of shear-wave velocity and electrical resistivity for Louisiana levees. Best-fit polynomial models for estimating soil type in Japanese levees have been created using cross-plots of shear-wave velocity and electrical resistivity. A similar study or model for flood protection structures in the Mississippi River delta plain or other major river delta does not exist. We make the soil-type estimation model more relevant to the foundation soils in the Louisiana Coastal Zone by identifying silt in addition to sand and clay, and eliminating gravel as a dominant soil type. …
Effects Of Landscape Fragmentation On Land Loss, Weijia Cheng
Effects Of Landscape Fragmentation On Land Loss, Weijia Cheng
LSU Master's Theses
Coastal Louisiana, the seventh largest delta on earth, is one of the most vulnerable coastal areas in the United States of America (USA) because of its land loss problem. Coastal land loss is usually caused by many complicated factors. With the rapid increase in human activities, more studies on land loss have focused on the anthropogenic elements, but less on the pattern of the landscape. It is expected that the type of spatial arrangement, such as high degree of fragmentation, would affect the degree of land erosion. A quantitative evaluation of coastal landscape fragmentation and its influences on land loss …
The Effect Of An 8-Minute Yoga Breathing Program On Fitness, Weight Loss And Breathing Capacity, Jerrold S. Petrofsky, Michael S. Laymon, Iman Akef Khowailed, Haneul Lee, Allie Petrofsky
The Effect Of An 8-Minute Yoga Breathing Program On Fitness, Weight Loss And Breathing Capacity, Jerrold S. Petrofsky, Michael S. Laymon, Iman Akef Khowailed, Haneul Lee, Allie Petrofsky
College of Health & Human Services (TUN) Publications and Research
This was a single blinded randomized study with an intervention group and a control group to examine a modification in lifestyle and an 8-minute exercise session each day to lose weight. Fifty-seven female subjects participated. Subjects underwent girth measurements at the umbilicus, hips, thigh and upper arm; weight, height (for BMI), body fat, heart rate, blood pressure, abdominal strength, leg strength, arm strength, sedentary O2 saturation, treadmill challenged O2 saturation, resting metabolism (which includes fat metabolism), and lung capacity. Measures were repeated at baseline and the end of the 6-week period. During the 6-week period, they followed a healthy recommended …
A Highly Sensitive Underwater Video System For Use In Turbid Aquaculture Ponds, Chin-Chang Hung, Shih-Chieh Tsao, Kuo-Hao Huang, Jia-Pu Jang, Hsu-Kuang Chang, Fred C. Dobbs
A Highly Sensitive Underwater Video System For Use In Turbid Aquaculture Ponds, Chin-Chang Hung, Shih-Chieh Tsao, Kuo-Hao Huang, Jia-Pu Jang, Hsu-Kuang Chang, Fred C. Dobbs
OES Faculty Publications
The turbid, low-light waters characteristic of aquaculture ponds have made it difficult or impossible for previous video cameras to provide clear imagery of the ponds' benthic habitat. We developed a highly sensitive, underwater video system (UVS) for this particular application and tested it in shrimp ponds having turbidities typical of those in southern Taiwan. The system's high-quality video stream and images, together with its camera capacity (up to nine cameras), permit in situ observations of shrimp feeding behavior, shrimp size and internal anatomy, and organic matter residues on pond sediments. The UVS can operate continuously and be focused remotely, a …
Curriculum Change 2016-2017, Portland State University
Curriculum Change 2016-2017, Portland State University
Bulletin & Curriculum Change Documents
No abstract provided.
The Pathology Of Command And Control: A Formal Synthesis, Michael Cox
The Pathology Of Command And Control: A Formal Synthesis, Michael Cox
Dartmouth Scholarship
One of the most important theories in the study of environmental governance and policy is the pathology of command and control, which describes the negative consequences of top-down, technocratic governance of social and ecological systems. However, to date, this theory has been expressed somewhat inconsistently and informally in the literature, even by the seminal works that have established its importance and popularized it. This presents a problem for the sustainability science community if it cannot be sure of the precise details of one of its most important theories. Without such precision, applications and tests of various elements of the theory …
Infectivity And Physiological Effects Of White Spot Syndrome Virus (Wssv) In Farmed Louisiana Red Swamp Crayfish (Procambarus Clarkii), Barcley Talon Pace
Infectivity And Physiological Effects Of White Spot Syndrome Virus (Wssv) In Farmed Louisiana Red Swamp Crayfish (Procambarus Clarkii), Barcley Talon Pace
LSU Master's Theses
The red swamp crayfish, Procambarus clarkii, represents an important aquaculture species responsible for over half of all commercial aquaculture profits in Louisiana. White spot syndrome virus (WSSV) is highly pathogenic and induces mass mortality in crustacean aquaculture operations worldwide. Crayfish lack the adaptive ability of the vertebrate immune system, and must depend on primitive, innate immune responses to combat viral infections. This study aims to investigate the dose-response of WSSV in P. clarkii and to examine viral-host interactions by examining the biochemical and immunological changes induced by WSSV infection in this species. Viable viral particles were isolated from naturally infected …
Vaccinations: Weighing The Risks And Benefits, Yosis Shapiro
Vaccinations: Weighing The Risks And Benefits, Yosis Shapiro
The Science Journal of the Lander College of Arts and Sciences
Research has proven that vaccines prevent disease. Important medical organizations conclusively support and advise the administration of vaccinations to prevent diseases that once caused devastating effects both in the individual who contracted, and in communities where these diseases spread. While some groups protest against the constitutionality of vaccinating, others counter that failure to do so subjects the unvaccinated to illness and death by contracting and spreading of the sickness. Despite statistics on reduced incidence of diseases with few consequences as a result of vaccine-induced passive immunity, fears of harm secondary to vaccination loom. In the 21st Century, many people are …
Pesticide Partitioning In Louisiana Wetland Aand Ricefield Sediment, Brendan Michael Marsh
Pesticide Partitioning In Louisiana Wetland Aand Ricefield Sediment, Brendan Michael Marsh
LSU Master's Theses
Pesticides are used globally and are often found within bodies of water. The EPA investigates the potential environmental impact through computer modeling in order to help mitigate some of the regulatory burden of pesticide fate investigation. Currently when pesticides enter a water body, the Exposure Analysis Modeling System (EXAMS) estimates partitioning depth as 5 cm and assumes equal distribution. This assumption was tested with a wide variety of pesticides with varying Koc ranges and water solubilities. Savillex 150 ml Teflon tubes were filled with wetland and ricefield sediments with fresh and seawater as the aqueous phase. The seven pesticides tested …
Using Tourmaline As An Indicator Of Provenance: Development And Application Of A Statistical Approach Using Random Forests, Erin Lael Walden
Using Tourmaline As An Indicator Of Provenance: Development And Application Of A Statistical Approach Using Random Forests, Erin Lael Walden
LSU Master's Theses
Tourmaline is a petrologic indicator mineral that is the major repository of boron in the earth’s crust. It forms readily when boron is present, accommodating multiple cations and anions with multiple possible substitutions for each site in the crystal structure. It is stable over a wide variety of pressures and temperatures, from near-surface P/T conditions to greater than 950 C and 7 GPa. It records information about conditions of formation, as well as pressure and temperature. Due to its resistance to chemical or physical weathering, and the negligible diffusion of elements in the crystal lattice, information about provenance is preserved. …
Effects Of Truck Based Ultra-Low Volume Mosquito Adulticides On Honey Bees (Apis Mellifera) In A Real World Scenario, Vivek Pokhrel
Effects Of Truck Based Ultra-Low Volume Mosquito Adulticides On Honey Bees (Apis Mellifera) In A Real World Scenario, Vivek Pokhrel
LSU Master's Theses
Honey bees are crucial pollinators for many economically important fruit crops. The recent honey bee colony decline in the United States and other regions of the world has caused concern among commercial beekeepers, research groups, the government, and the general public. The role of pesticides in recent honey bee declines has not been fully determined. In Louisiana, it is a common practice to spray truck based ultra-low volume mosquito adulticides in Integrated Mosquito Management Programs to control mosquitoes and minimize the risk of vector borne viruses such as West Nile, chikungunya, and Zika. This study measured the effects of truck …
Hydrodynamic Simulations Of The Prototype Mississippi River And Expanded Small-Scale Physical Model To Investigate Impact Of Sea Level Rise, Linsey Brooke Olivier
Hydrodynamic Simulations Of The Prototype Mississippi River And Expanded Small-Scale Physical Model To Investigate Impact Of Sea Level Rise, Linsey Brooke Olivier
LSU Master's Theses
The Expanded Small-Scale Physical Model (ESSPM) is a distorted-scale, moveable bed model that will complement numerical and field studies studying management strategies in the lower ~140 miles of the Mississippi River and their effect on flooding, navigation and coastal restoration. It is recognized that relative sea level rise (RSLR), the combination of eustatic sea level rise (ESLR) and subsidence, will have an impact on the hydraulics and sediment transport in the lower River. However, it is physically impossible to replicate subsidence in the ESSPM; thus, future RSLR conditions will be experimentally simulated by raising Gulf of Mexico (GoM) levels commensurate …
New Archiving, Fingering, And Assessing Techniques For Sheet Music Using Advanced Signal Processing Approaches, Ting-Chen Hsu
New Archiving, Fingering, And Assessing Techniques For Sheet Music Using Advanced Signal Processing Approaches, Ting-Chen Hsu
LSU Master's Theses
In this thesis, advanced signal processing techniques are proposed to archive the musical scores, guide the novice pianists to play piano with appropriate fingerings, and assess the harmonization for musical composition. The mathematical frameworks for these three applications are established and the corresponding optimization problems are formulated. The optimal solutions are also provided. First, the hard- and soft-archiving approaches for storing and distributing musical scores are investigated. By use of the popular musical scripting language, LilyPond, as the intermediate data format, we propose to encode the LilyPond script, which is converted from the original musical score, to the two-dimensional quick-response …
Fractal Shapes Generated By Iterated Function Systems, Mary Catherine Mckinley
Fractal Shapes Generated By Iterated Function Systems, Mary Catherine Mckinley
LSU Master's Theses
This thesis explores the construction of shapes and, in particular, fractal-type shapes as fixed points of contractive iterated function systems as discussed in Michael Barnsley's 1988 book ``Fractals Everywhere." The purpose of the thesis is to serve as a resource for an undergraduate-level introduction to the beauty and core ideas of fractal geometry, especially with regard to visualizations of basic concepts and algorithms.
Option Volatility & Arbitrage Opportunities, Mikael Boffetti
Option Volatility & Arbitrage Opportunities, Mikael Boffetti
LSU Master's Theses
This paper develops several methods to estimate a future volatility of a stock in order to correctly price corresponding stock options. The pricing model known as Black-Scholes-Merton is presented with a constant volatility parameter and compares it to stochastic volatility models. It mathematically describes the probability distribution of the underlying stock price changes implied by the models and the consequences. Arbitrage opportunities between stock options of various maturities or strike prices are explained from the volatility smile and volatility term structure.
Everglades Mangrove Forest Response To Large-Scale Disturbance: Long-Term Assessment Of Structural And Functional Properties, Tess Marie Danielson
Everglades Mangrove Forest Response To Large-Scale Disturbance: Long-Term Assessment Of Structural And Functional Properties, Tess Marie Danielson
LSU Master's Theses
The impact (i.e., defoliation and mortality) associated with large-scale natural disturbance events is capable of significantly altering ecosystem structure (e.g., biomass) and function (e.g., productivity) in mangrove wetlands. These pulsing events provide an opportunity to assess ecosystem resilience (i.e., recovery to pre-disturbance conditions) by evaluating the immediate and long-term ecosystem response trajectory (i.e., disturbance magnitude, recovery time). I hypothesized that 1) there are specific properties of disturbance that can be characterized and fit to a general forest disturbance model, and that 2) a mangrove forest recovery trajectory (i.e. recovery duration and rate) is dependent on the disturbance magnitude and initial …
Applying Deep Learning Techniques To The Analysis Of Android Apks, Robin Andrew Nix
Applying Deep Learning Techniques To The Analysis Of Android Apks, Robin Andrew Nix
LSU Master's Theses
Malware targeting mobile devices is a pervasive problem in modern life and as such tools to detect and classify malware are of great value. This paper seeks to demonstrate the effectiveness of Deep Learning Techniques, specifically Convolutional Neural Networks, in detecting and classifying malware targeting the Android operating system. Unlike many current detection techniques, which require the use of relatively rigid features to aid in detection, deep neural networks are capable of automatically learning flexible features which may be more resilient to obfuscation. We present a parsing for extracting sequences of API calls which can be used to describe a …
Madagascar’S Mangroves: Quantifying Nation-Wide And Ecosystem Specific Dynamics, And Detailed Contemporary Mapping Of Distinct Ecosystems, Trevor G. Jones, Leah Glass, Samir Gandhi, Lalao Ravaoarinorotsihoarana, Aude Carro, Lisa Benson, Harifidy Rakoto Ratsimba, Chandra Giri, Dannick Randriamanatena, Garth Cripps
Madagascar’S Mangroves: Quantifying Nation-Wide And Ecosystem Specific Dynamics, And Detailed Contemporary Mapping Of Distinct Ecosystems, Trevor G. Jones, Leah Glass, Samir Gandhi, Lalao Ravaoarinorotsihoarana, Aude Carro, Lisa Benson, Harifidy Rakoto Ratsimba, Chandra Giri, Dannick Randriamanatena, Garth Cripps
Environmental Science and Management Faculty Publications and Presentations
Mangrove ecosystems help mitigate climate change, are highly biodiverse, and provide critical goods and services to coastal communities. Despite their importance, anthropogenic activities are rapidly degrading and deforesting mangroves world-wide. Madagascar contains 2% of the world’s mangroves, many of which have undergone or are starting to exhibit signs of widespread degradation and deforestation. Remotely sensed data can be used to quantify mangrove loss and characterize remaining distributions, providing detailed, accurate, timely and updateable information. We use USGS maps produced from Landsat data to calculate nation-wide dynamics for Madagascar’s mangroves from 1990 to 2010, and examine change more closely by partitioning …
Three Simple Experiments To Examine The Effect Of Sediment Pollution On Algae-Based Food Webs In Streams, Patrick M. Edwards, Rodney Shroufe
Three Simple Experiments To Examine The Effect Of Sediment Pollution On Algae-Based Food Webs In Streams, Patrick M. Edwards, Rodney Shroufe
Environmental Science and Management Faculty Publications and Presentations
Streams and stream macroinvertebrates are ideal natural systems for ecological inquiry. We present three simple experiments that students can use to conduct field-based investigations which illustrate the importance of algae-based food webs in streams and measure the effects of sediment pollution (scour and deposition) on stream ecological processes. Over the past 5 years, we have conducted these experiments 19 times with our students. We report on the results and reliability of these experiments and make suggestions for other educators who may want to conduct them.
Resident Perceptions Of Natural Resources Between Cities And Across Scales In The Pacific Northwest, Anita T. Morzillo, Betty J. Kreakie, Noelwah R. Netusil, J. Alan Yeakley
Resident Perceptions Of Natural Resources Between Cities And Across Scales In The Pacific Northwest, Anita T. Morzillo, Betty J. Kreakie, Noelwah R. Netusil, J. Alan Yeakley
Environmental Science and Management Faculty Publications and Presentations
As the global population becomes increasingly urban, research is needed to explore how local culture, land use, and policy will influence urban natural resource management. We used a broad-scale comparative approach and survey of residents within the Portland (Oregon)-Vancouver (Washington) metropolitan areas, USA, two states with similar geographical and ecological characteristics, but different approaches to land-use planning, to explore resident perceptions about natural resources at three scales of analysis: property level (“at or near my house”), neighborhood (“within a 20-minute walk from my house”), and metro level (“across the metro area”). At the metro-level scale, nonmetric multidimensional scaling revealed that …
The Effects Of The Aca On Actuarial Pricing: How The Work Of Health Actuaries Has Changed Post-Aca, Alex M.S. George
The Effects Of The Aca On Actuarial Pricing: How The Work Of Health Actuaries Has Changed Post-Aca, Alex M.S. George
University Honors Theses
In the United States, the Patient Protection and Affordable Care Act (PPACA or ACA) drastically altered the health insurance industry. Insurers are no longer able to deny coverage or charge higher premiums based on an individual’s medical history. In order to more evenly spread the financial risks associated with these ACA reforms among insurers and stabilize health insurance premiums, risk-sharing provisions dubbed the "3 R's" (risk adjustment, risk corridors, and reinsurance) were instituted in the individual and small group market. This thesis will begin with a discussion of the "3 R's" and the other ACA regulations that have had significant …
Understanding Multiple Sclerosis Through Retinal Cell Layer Thickness: An Insight Into The Neurodegeneration Process, Zac Festner
Understanding Multiple Sclerosis Through Retinal Cell Layer Thickness: An Insight Into The Neurodegeneration Process, Zac Festner
University Honors Theses
Patients with multiple sclerosis (MS) have long been known to suffer deterioration of the retina, sometimes leading to blindness. The damage has been assumed to occur predominantly within the retinal nerve fiber layer. Using optical coherence tomography (OCT), researchers at Johns Hopkins University have determined that there is a subset of MS patients for whom the retinal deterioration is different. For this group the deterioration occurs at a deeper level within the retina, between the photoreceptors and the connecting cells. This deterioration affects the inner and outer nuclear layers of the retina. These findings are perplexing, as MS is considered …
Teaching The Middle East In Portland Public High Schools, Nicholas C. Jenkins
Teaching The Middle East In Portland Public High Schools, Nicholas C. Jenkins
University Honors Theses
This paper examines the ways in which the Middle East is taught to high school students in Portland Public School. Specifically, it focuses on the required history courses, Modern World History and United States History for Freshman and Juniors, respectively. Beginning with a definition of the Middle East, this paper starts by placing itself and the author within a discourse community of educators, historians, and writers who discuss the issues with incorporating multiple points of view into their curriculum. After a discussion of the methods by which the data was collected, this paper concludes by offering a description of that …
A Numerical Modeling Investigation On Calving And The Recession Of South Cascade Glacier, Annika Noel Horlings
A Numerical Modeling Investigation On Calving And The Recession Of South Cascade Glacier, Annika Noel Horlings
University Honors Theses
Retreat of South Cascade Glacier has been well documented since 1957. Despite this, little research has examined why South Cascade Glacier has receded more rapidly than other glaciers in the North Cascades region of Washington State during the last century. The purpose of this thesis is to determine whether calving associated with the proglacial South Cascade Lake significantly influenced the glacier’s retreat. A simple numerical model using documented and projected historical net mass balances, bed configuration data, and lake basin data is used to approximate the recession of South Cascade Glacier during the last century. To evaluate the influence of …