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2014

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Articles 7111 - 7140 of 7238

Full-Text Articles in Engineering

Advanced And Novel Modeling Techniques For Simulation, Optimization And Monitoring Chemical Engineering Tasks With Refinery And Petrochemical Unit Applications, Gregory M. Robertson Jan 2014

Advanced And Novel Modeling Techniques For Simulation, Optimization And Monitoring Chemical Engineering Tasks With Refinery And Petrochemical Unit Applications, Gregory M. Robertson

LSU Doctoral Dissertations

Engineers predict, optimize, and monitor processes to improve safety and profitability. Models automate these tasks and determine precise solutions. This research studies and applies advanced and novel modeling techniques to automate and aid engineering decision-making. Advancements in computational ability have improved modeling software’s ability to mimic industrial problems. Simulations are increasingly used to explore new operating regimes and design new processes. In this work, we present a methodology for creating structured mathematical models, useful tips to simplify models, and a novel repair method to improve convergence by populating quality initial conditions for the simulation’s solver. A crude oil refinery application …

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The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe Jan 2014

The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe

LSU Doctoral Dissertations

Distracted driving continues to remain a cause of concern for a number of bodies, including government agencies, traffic safety advocacy groups and law enforcement agencies, because of its traffic safety risks. The driving simulator continues to be popular with researchers in collecting data on performance variables that provide scientific knowledge of the effects of distracted driving. Several of these performance variables can be used to quantify a single distracting effect, resulting in a multivariate dataset. A literature review of related studies revealed that researchers overwhelmingly use univariate (single and multiple) tests to analyze the resulting dataset. Performing multiple univariate tests …

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Physico-Chemical Properties Of Green Leaf Volatiles, Harsha Satyanarayana Vempati Jan 2014

Physico-Chemical Properties Of Green Leaf Volatiles, Harsha Satyanarayana Vempati

LSU Master's Theses

Green Leaf Volatiles (GLVs) is a class of vegetation emissions whose release is greatly enhanced in the event of thermal or mechanical stress. These oxygenated hydrocarbons that have been identified as a potential source of Secondary Organic Aerosols (SOA) via aqueous oxidation. The physico-chemical properties of GLVs are vital to understanding their fate and transport in the atmosphere, but few experimental data are available. We studied the aqueous solubility, 1-Octanol/Water Partition Coefficient, and Henry’s Constant (KH) of five GLVs at 25&176;C: methyl jasmonate, methyl salicylate, 2-methyl-3-buten-2-ol, cis-3-hexen-1-ol, and cis-3-hexenyl acetate. Henry’s constant was additionally measured at 30&176;C & 35&176;C, and …

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Composition Control Of Spinel Lithium Manganese Oxide For High Voltage, High Energy Lithium Ion Batteries, Hilary Eikhuemelo Jan 2014

Composition Control Of Spinel Lithium Manganese Oxide For High Voltage, High Energy Lithium Ion Batteries, Hilary Eikhuemelo

LSU Master's Theses

In the quest for renewable source of energy, a remarkable step made was in the introduction of the battery system. The lithium ion battery was revolutionary in this regard particularly for its light weight and high energy density. There has been significant progress in the development of this battery system since the present form was introduced in the 1990s. There is currently a global dependence on the use of lithium ion battery in diverse applications such as in the electronics, communications and automobiles. Unfortunately, the energy obtainable from the lithium ion battery continuously falls behind the energy demand. This setback …

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Data Distribution In Hpx, Bibek Ghimire Jan 2014

Data Distribution In Hpx, Bibek Ghimire

LSU Master's Theses

High Performance Computation (HPC) requires a proper and efficient scheme for distribution of the computational workload across different computational nodes. The HPX (High Performance ParalleX) runtime system currently lacks a module that automates data distribution process so that the programmer does not have to manually perform data distribution. Further, there is no mechanism allowing to perform load balancing of computations. This thesis addresses that issue by designing and developing a user friendly programming interface conforming to the C++11/14 Standards and integrated with HPX which enables to specify various distribution parameters for a distributed vector. We present the three different distribution …

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Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas Jan 2014

Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas

LSU Doctoral Dissertations

In this dissertation we consider the problem of localization of wireless devices in environments and applications where GPS (Global Positioning System) is not a viable option. The _x000C_rst part of the dissertation studies a novel positioning system based on narrowband radio frequency (RF) signals of opportunity, and develops near optimum estimation algorithms for localization of a mobile receiver. It is assumed that a reference receiver (RR) with known position is available to aid with the positioning of the mobile receiver (MR). The new positioning system is reminiscent of GPS and involves two similar estimation problems. The _x000C_rst is localization using …

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Bioavailability Of Alpha-Tocopherol Entrapped In Poly (Lactide-Co-Glycolide) (Plga) And Plga-Chitosan Nanoparticles, Lacey Caroline Simon Jan 2014

Bioavailability Of Alpha-Tocopherol Entrapped In Poly (Lactide-Co-Glycolide) (Plga) And Plga-Chitosan Nanoparticles, Lacey Caroline Simon

LSU Master's Theses

Alpha-tocopherol (áT) is a hydrophobic, antioxidant molecule shown to prevent or retard the effects of free radicals associated with diseases. It is hypothesized that the bioavailability of áT can be improved when entrapped in PLGA (Poly lactide-co-glycolide) and PLGA-Chi (PLGA-Chitosan) nanoparticles and that the mucoadhesive properties of chitosan may enhance absorption more than PLGA alone. PLGA and PLGA-Chi NPs synthesized with PVA as surfactant were characterized by measuring entrapment efficiency, size, PDI, and zeta potential when suspended in DI water. Nanoparticle physical stability was evaluated via NP exposure to environmental pH ranging from 2.5-9. Chemical stability of entrapped áT was …

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Energy Dissipation And Entropy Generation During The Fatigue Degradation: Application To Health Monitoring Of Composites, Ali Kahirdeh Jan 2014

Energy Dissipation And Entropy Generation During The Fatigue Degradation: Application To Health Monitoring Of Composites, Ali Kahirdeh

LSU Doctoral Dissertations

In this dissertation, an experimental approach for characterizing energy dissipation and degradation evolution in a woven Epoxy/Glass (G10/FR4) laminate subjected to fully reversed bending fatigue test is presented. Infrared thermography and acoustic emission are utilized to characterize the degradation progression. The results show similar evolutionary response indicating the presence of three degradation stages. The effect of the surface cooling on the fatigue life of the laminates is investigated both experimentally and analytically. The results show that the life of the laminate is highly dependent on the temperature and that surface cooling can significantly increase the fatigue life of the laminate. …

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Optimizing Bioengineered Coastal Materials, Matthew Byrum Jan 2014

Optimizing Bioengineered Coastal Materials, Matthew Byrum

LSU Master's Theses

Developing materials that are environmentally friendly and capable of high performance is important to maximize the efficiency and success of coastal restoration projects. Louisiana is losing large amounts of coastal land each year, while suffering 90% of the United States’ coastal wetland loss. Some areas have begun to implement physical structures to dissipate wave energy and accrete sediment. Recent technological advances have allowed the transformation of these structures into engineered ecosystems, with a focus on oyster accumulation. These ecosystems support the growth of oysters, Crassostrea virginica, which serve to improve water quality and protect shorelines through filtration and wave energy …

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Cyber-Physical Security Strategies, Sarah Davis Jan 2014

Cyber-Physical Security Strategies, Sarah Davis

LSU Master's Theses

Cyber-physical security describes the protection of systems with close relationships between computational functions and physical ones and addresses the issue of vulnerability to attack through both cyber and physical avenues. This describes systems in a wide variety of functions, many crucial to the function of modern society, making their security of paramount importance. The development of secure system design and attack detection strategies for each potential avenue of attack is needed to combat malicious attacks. This thesis will provide an overview of the approaches to securing different aspect of cyber-physical systems. The cyber element can be designed to better prevent …

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Novel Nanostructured Titania And Titania Nanocomposites For Photovoltaics And Photocatalysis, Xinning Luan Jan 2014

Novel Nanostructured Titania And Titania Nanocomposites For Photovoltaics And Photocatalysis, Xinning Luan

LSU Doctoral Dissertations

With the consumption of energy continually increasing around the world and the main source of this energy, fossil fuels, slowly being depleted, the need for alternate sources of energy is becoming more and more pertinent. Demand for solar energy has experienced exponential increase over the last decade. Nanostructured TiO2 has attracted significant attention due to its nontoxicity, low cost and wide applications in photovoltaics and photocatalysis. This research is focused on novel synthesis and surface modification of TiO2 nanotube arrays for applications in advanced dye-sensitized solar cells (DSSCs) and efficient photocatalysis. The first part of this work entails fast synthesis …

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Energy And Thermodynamically Based Approaches For Analysis Of Damage In Contact Problems, Afshin Babaie Aghdam Jan 2014

Energy And Thermodynamically Based Approaches For Analysis Of Damage In Contact Problems, Afshin Babaie Aghdam

LSU Doctoral Dissertations

A novel methodology for analysis of damage in contact problems in presented. Two important categories of contact damage are studied, namely crack nucleation and adhesive wear. The proposed methodology is primarily based on the laws of energy and thermodynamics, and as such offers great advantages by unifying the analysis of damage in a variety of contact configurations. Crack nucleation is the first damage type analyzed. For this purpose, the line-contact fretting configuration is chosen. A thermodynamically-based continuum damage mechanics (CDM) approach is employed. Intense stress gradients in the contact region are found to be highly influential in the crack nucleation …

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Iron Removal Using Electro- Coagulation Followed By Floating Bead Bed Filtration, Asmita Anil Phadke Jan 2014

Iron Removal Using Electro- Coagulation Followed By Floating Bead Bed Filtration, Asmita Anil Phadke

LSU Master's Theses

High iron concentrations in the water used for aquaculture results in stock losses. It is necessary to drop down the iron concentrations to levels which can be handled by the fish. Electrocoagulation followed by floating bead bed filtration was used to remove iron from water. Electrocoagulation was carried out using aluminum electrodes. The flocs formed in the coagulation tank were then filtered out using 2-3 mm polyethylene floating beads having specific gravity of 0.92 gm/cm3. Proper retention time of ≥ 10 min, pH of 6±0.2, Al3+ coagulant dosage of about 9 mg-Al3+/ L and flow rate ≤ 0.4 gpm resulted …

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Spectrum Sensing, Spectrum Monitoring, And Security In Cognitive Radios, Erfan Soltanmohammadi Jan 2014

Spectrum Sensing, Spectrum Monitoring, And Security In Cognitive Radios, Erfan Soltanmohammadi

LSU Doctoral Dissertations

Spectrum sensing is a key function of cognitive radios and is used to determine whether a primary user is present in the channel or not. In this dissertation, we formulate and solve the generalized likelihood ratio test (GLRT) for spectrum sensing when both primary user transmitter and the secondary user receiver are equipped with multiple antennas. We do not assume any prior information about the channel statistics or the primary user’s signal structure. Two cases are considered when the secondary user is aware of the energy of the noise and when it is not. The final test statistics derived from …

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Multiscale Estimation Of Inertial Effects For Frac-Pack Completed Gas Reservoirs, Sultan Anbar Jan 2014

Multiscale Estimation Of Inertial Effects For Frac-Pack Completed Gas Reservoirs, Sultan Anbar

LSU Doctoral Dissertations

Accurate estimation of production from frac-pack completed gas wells requires reliable estimation of flow properties from reservoir rocks and proppants. This study is composed of three parts: core-scale, pore-scale and reservoir-scale analyses of this problem. In the core-scale analysis, simultaneous estimation of permeability, non-Darcy, and Klinkenberg coefficients of reservoir rock is conducted from steady-state and pulse-decay experiments. Confidence intervals of the estimated parameters are determined from the Bootstrap method. The duration of pulse-decay experiments has a large impact on confidence intervals; therefore, correlations are developed to estimate the experimental duration for both 1-tank and 2-tank set-ups from the core properties …

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A System Approach To Investing In Uncertain Markets, Iman Khademi Jan 2014

A System Approach To Investing In Uncertain Markets, Iman Khademi

LSU Doctoral Dissertations

We consider the problem of trend-following in US stock market and propose a combined economic and technical model to approach this problem. A bank of linear and nonlinear, discrete-time, low-pass filters with different sampling rates is used to generate timing signals for US stock market indexes such as NASDAQ Composite and S&P 500. These timing signals help us find the appropriate times to step in or out of the market. Back-testing and real-time implementation results along with the risk analysis validate our model. According to the trend of the market, we may adopt a long or short position. If we …

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Quantifying Phase Configuration Inside An Intact Core Based On Wettability Using X-Ray Computed Tomography, Dinara Dussenova Jan 2014

Quantifying Phase Configuration Inside An Intact Core Based On Wettability Using X-Ray Computed Tomography, Dinara Dussenova

LSU Master's Theses

The ability to evaluate rock and fluid properties on the order of a few microns opens new areas in reservoir engineering and reservoir simulation. Multiple studies have been done on the application of x-ray computed tomography (microCT) for the pore-scale evaluation of fluid interfaces and rock-fluid interaction. A majority of the fluid flow governing interactions occur at the pore scale level and is usually overseen on large reservoir scales. Hence, it is important to carefully investigate such interactions. Multi-fluid-phase distribution and interaction of two immiscible fluids such as oil and water is one of the most important and constantly investigated …

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Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr Jan 2014

Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr

LSU Doctoral Dissertations

This aim of this research project is to probe the activation process of zebrafish spermatozoa. Zebrafish are a model species for biological engineering applications, and the cryopreservation of their reproductive cells allows for inexpensive cataloging and maintenance of valuable biological material. Evaluation of cryopreservation protocols for aquatic sperm cells is typically accomplished by motility analysis after subjecting cells to a cryopreservation treatment. In zebrafish sperm cells, motility is initiated when cells come into contact with a hypo-osmotic environment. Subsequent activation analysis is currently done manually and brings with it an inherent difficulty and error. This process is slow and not …

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Utilization Of Carbon Nanofibers Grown On Glass Microballoons (Nmbs) In Point-Of-Care Diagnostic Devices, Emmanuel Gikunoo Jan 2014

Utilization Of Carbon Nanofibers Grown On Glass Microballoons (Nmbs) In Point-Of-Care Diagnostic Devices, Emmanuel Gikunoo

LSU Doctoral Dissertations

The use of point-of-care (POC) diagnostic systems holds great promise for the early detection of various diseases. However, detection limits for commercially available POC systems have not been able to meet the lower cutoffs offered by the specialized laboratory testing methods. Research into the use of carbon nanofibers (CNFs) grown on glass microballoons in POC devices was studied. The growth of several millions of the CNFs on each microballoon (NMBs) presented a large surface area with high probability of capturing minute concentrations of biospecies. Functionalization of the NMBs with the carboxyl group needed for biospecies conjugation was achieved by air …

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Evaluation Of Triploid Oysters As A Tool To Assess Short- And Long-Term Seafood Contamination Of Oil Spill-Impacted Areas, Martin Scott Miles Jan 2014

Evaluation Of Triploid Oysters As A Tool To Assess Short- And Long-Term Seafood Contamination Of Oil Spill-Impacted Areas, Martin Scott Miles

LSU Doctoral Dissertations

Many of the organic components of oil have the capacity to persist in the environment, bioaccumulate in tissues, and are toxic to surrounding organisms. Since the early 1970s, environmental assessment programs have utilized bivalves as monitoring tools of chemical contaminants in the marine environment. Because of their sedentary and filter-feeding habit (bioaccumulation), mussels and oysters been employed as sentinel organisms in environmental quality monitoring studies in coastal ecosystems. The use of indigenous (diploid) bivalves for biomonitoring water quality is limited during the summer months due to high stress and changes in biochemical composition induced by reproductive development. In this work …

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Investigating Different Coding Environments For Simplified Reservoir Characterization Models, Atheer Mohammad Al Attar Jan 2014

Investigating Different Coding Environments For Simplified Reservoir Characterization Models, Atheer Mohammad Al Attar

LSU Master's Theses

Reservoir characterization is one of the most important tasks that determines the recovery plan for a specific reservoir. This process incorporates a significant amount of data acquisition and processing to finally develop an acceptable model that matches the production history and can forecast the future production behavior. The model also should be able to adapt to changes along the way: adding or removing producers or injectors, changing the injection pattern, recompletions and converting wells are all examples of possible changes that are common in the oil and gas industry. Usually these changes are modeled by running field-scale simulations and providing …

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Carbon Nanotube Inkjet Printing For Flexible Electronics And Chemical Sensor Applications, Ryan P. Tortorich Jan 2014

Carbon Nanotube Inkjet Printing For Flexible Electronics And Chemical Sensor Applications, Ryan P. Tortorich

LSU Master's Theses

Carbon nanotubes (CNTs) are becoming a promising new material for use in many fields including the field of electronics. Their mechanical and electrical properties lend themselves to be used in a new generation of electronic devices, namely flexible electronics. Although many deposition methods for carbon nanotubes exist, inkjet printing offers many advantages including superior patterning ability and low-cost fabrication. Presented in this work is the use of inkjet printing in order to deposit carbon nanotubes onto a flexible transparency film. The methods for developing and printing an aqueous single-walled carbon nanotube (SWCNT) ink and an aqueous multi-walled carbon nanotube (MWCNT) …

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A Virtual Testbed For Embedded Systems, Shrikant Labade Jan 2014

A Virtual Testbed For Embedded Systems, Shrikant Labade

LSU Master's Theses

Hardware-In-the-Loop (HIL) Simulation is a simulation approach in which a hardware embedded processor is connected to the simulation computer that simulates the electrical/mechanical devices controlled by the embedded processor. By using a real-time simulation computer and special-purpose hardware for connecting to the embedded processor, this method of simulation can be very precise but is costly. We are proposing an alternative method, HIL simulation with a network link, in which the device under test (the embedded processor) communicates with the simulation computer over a network connection (in our case a serial line) instead of through special-purpose hardware. We present an abstraction …

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Restraint Moments Due To Thermal Gradients In Continuous Prestressed Concrete Girder Bridges, Sushovan Ghimire Jan 2014

Restraint Moments Due To Thermal Gradients In Continuous Prestressed Concrete Girder Bridges, Sushovan Ghimire

LSU Master's Theses

This research is motivated by the need to develop new bridges, using new materials and construction details to achieve the goal of building longer span bridges that are safe and durable. The study of precast/prestressed concrete bridges made continuous started early in the 1960’s. Continuous bridges have many advantages compared to simple span bridges such as reduction in structural depth, riding comfort and reserve load capacity under overload conditions. They also eliminate joints that require a lot of maintenance and cause deterioration in some cases. The design and construction of continuous bridges requires the consideration of many factors that are …

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Effect Of Process Mixing On The Size Distribution And Mean Diameter Of The Thiol-Triacrylate Microcapsules, Rubaiyet Abedin Jan 2014

Effect Of Process Mixing On The Size Distribution And Mean Diameter Of The Thiol-Triacrylate Microcapsules, Rubaiyet Abedin

LSU Master's Theses

An important limitation in the development of the microparticles is the difficulty to develop a precise size distribution. Microparticles have a wide spread applicability in different fields including medical, pharmaceutical, textile, cosmetics, pesticide, printing industry, etc. The large and growing impact of microencapsulation in different fields of technology has made this process important. Microparticle size is a primary determinant of control release mechanism and the reaction kinetics and also impacts the allowable routes of administration, The main objective of this research work is to evaluate the effect of the process mixing on the size and size distribution of the trithiol-triacrylate …

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An Experimental Investigation Of The Effects Of N-Decane On The Supercritical Pyrolysis Of Toluene, Catherine A. Grubb Jan 2014

An Experimental Investigation Of The Effects Of N-Decane On The Supercritical Pyrolysis Of Toluene, Catherine A. Grubb

LSU Master's Theses

Future and current high-speed jet aircraft will require their fuels to act as the primary coolants as well as propellants. Fuels will be exposed to severe temperatures and pressures in hypersonic aircraft, up to 700°C and 130 atm, respectively, conditions that are supercritical for most pure hydrocarbons. Under supercritical conditions, hydrocarbon fuels undergo pyrolytic reactions, which may lead to the formation of polycyclic aromatic hydrocarbons (PAH), known precursors to carbonaceous solid deposits. Such deposits may clog fuel lines and injection nozzles, hindering safe engine performance. Hence, it is important to understand the reactions that lead to the formation of PAH. …

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Assimilation, A Biological Nitrogen Removal Strategy For Freshwater Ornamental Fish Hatcheries, Fatemehsadat Fahandezhsadi Jan 2014

Assimilation, A Biological Nitrogen Removal Strategy For Freshwater Ornamental Fish Hatcheries, Fatemehsadat Fahandezhsadi

LSU Master's Theses

Freshwater ornamental fish production is a major component of aquaculture in the southeastern United States. Closed recirculating aquaculture systems (RASs) allow freshwater ornamental fish hatcheries to mimic native water quality conditions for sensitive species. Total ammonia-N (TAN) removal is the major concern for closed RASs. Biological nitrification is the common method to control TAN. However, the nitrification process might be impaired in acidic water condition with pH<7. Another issue of using the nitrification process for TAN removal is that the nitrification is not sufficient to compensate for the amount of ammonia released in larval production systems because of slow growth rate of nitrifying bacteria. To address these issues, this study suggests an aerobic assimilation strategy in which fast growing heterotrophic bacteria directly convert TAN into microbial biomass. The heterotrophic bacteria needs an external carbon source. This study employed polyhydroxybutyrate (PHB) that is a solid insoluble bioplastic, as a carbon source in the aerobic assimilation process to avoid releasing carbon into the system. In order to understand the applicability of an assimilation process instead of nitrification, this study compared the ammonia-N removal rate by aerobic assimilation biofilters operating @ pH 8 and 6.5 in a batch system. The study also quantified the performance of an aerobic assimilation strategy under different continuous nitrogen loading regimes. This investigation can be used to establish the biofilter air pulsing frequency, which is the optimized air pulsing frequency that avoids clogging in the system. The results showed that there was no apparent release of carbon in the water tank. Unlike nitrification, assimilation strategy for TAN removal was not significantly different in two pH of 8 and 6.5 @ 28 ° C. The average consumption rate of the PHB was found as 21.93± 0.43 grams of PHB consumed per gram of TAN. The results from the continuous system, at a continuous feeding rate of 350 mg-N/d, suggested that the optimum air pulsing frequency through the PHB bed for releasing the excess biosolids was about 6-hour. In general, the study found that the aerobic assimilation using polyhydroxybutyrate (PHB) as a carbon source is an applicable method for ammonia-N removal particularly for freshwater ornamental fish production systems. The drawback against this approach is that the PHB beads are expensive. However, our investigations show that the average cost of the PHB beads have been decreased dramatically during the last few years. This might indicate that the assimilation using PHB beads can be a reasonable choice for ammonia-N removal particularly for freshwater ornamental fish production systems.

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Determining The Location Of Congestion Hot Spots In Urban Areas Using Image Analysis, Aditya Mokkapati Jan 2014

Determining The Location Of Congestion Hot Spots In Urban Areas Using Image Analysis, Aditya Mokkapati

LSU Master's Theses

The identification of congestion hot spots plays an important role in congestion monitoring of highway and arterial systems. Traditionally, vehicle detection systems or probe vehicles are used to measure travel time and identify congestion hot spots. This approach is time-consuming and resource intensive. With the advent of new technologies like crowdsourcing, travel time can be collected more cost-effectively using fewer resources. The research presented in this paper develops a new methodology to identify congestion hot spots in an urban area using freely available historical speed data gathered by Google and published as a traffic layer in Google maps. The methodology …

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Applications Of Cfd Simulations On Studying The Multiphase Flow In Microfluidic Devices, Yuehao Li Jan 2014

Applications Of Cfd Simulations On Studying The Multiphase Flow In Microfluidic Devices, Yuehao Li

LSU Doctoral Dissertations

Microfluidics has been extensively investigated as a unique platform to synthesize nanoparticles with desired properties, e.g., size and morphology. Compared to the conventional batch reactors, wet-chemical synthesis using continuous flow microfluidics provides better control over addition of reagents, heat and mass transfer, and reproducibility. Recently, millifluidics has emerged as an alternative since it offers similar control as microfluidics. With its dimensions scaled up to millimeter size, millifluidics saves fabrication efforts and potentially paves the way for industrial applications. Good designs and manipulations of microfluidic and millifluidic devices rely on solid understanding of fluid dynamics. Fluid flow plays an important role …

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Biodegradation Of Mc252 Crude Oil After Mobilization By Washover Events On Coastal Headland Beaches, David Nelson Curtis Jan 2014

Biodegradation Of Mc252 Crude Oil After Mobilization By Washover Events On Coastal Headland Beaches, David Nelson Curtis

LSU Master's Theses

Washover events on coastal headland beaches occur when storm surge from cold fronts, high tides, tropical storms, and hurricanes move across the beach, reworking and depositing sand in the back marshes and shallow mudflat areas. On Fourchon Beach, Louisiana, a 9-mile coastal headland beach impacted by the Deep Water Horizon oil spill, these washover events have intermittently moved oil from the subtidal and intertidal portion of the beach to the supratidal mudflats and marsh areas. In order to determine the impacts of washover events on oil fate, 3 complementary studies were undertaken. First, washover areas (N=59) have been mapped and …

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