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Articles 571 - 600 of 1307
Full-Text Articles in Engineering
Experimental And Numerical Investigation Of Pilot Scale Microwave Assisted Transesterification Process For Biodiesel Production, Pranjali D. Muley
Experimental And Numerical Investigation Of Pilot Scale Microwave Assisted Transesterification Process For Biodiesel Production, Pranjali D. Muley
LSU Master's Theses
The goal of this study was to design and test a pilot scale process for biodiesel production using advanced microwave technology and develop a numerical model for investigating various parameters affecting this process. Dielectric properties of materials play a major role in microwave design of a process. The dielectric properties (dielectric constant ε’ and dielectric loss ε”) of biodiesel precursors: soybean oil, alcohols and catalyst and their different mixtures were measured at four different temperatures (30°C, 45°C, 60°C and 75°C) and in the frequency range of 154 MHz to 4.5 GHz. Results indicate that the microwave dielectric properties of almost …
Micro Grid Stability Improvements By Employing Storage, Sumiti Lamichhane
Micro Grid Stability Improvements By Employing Storage, Sumiti Lamichhane
LSU Master's Theses
Storage devices can be used in a power gird to store the excess energy when the energy production is high and the demand is low and utilize the stored energy when the produced energy cannot meet the high demands of the consumers. This thesis represents a micro grid consisting of a conventional synchronous generator, as well as renewable energy sources, energy storage, and loads in order to investigate the effective energy flow control and transient stability improvement by employing thermal storage. Thermal storage, unlike electrical one (such as battery) is more environmental friendly, has longer life span, and is more …
An Electronic Architecture For Mediating Digital Information In A Hallway Fac̦Ade, Narendra Nallapeta Aswathanarayana Setty
An Electronic Architecture For Mediating Digital Information In A Hallway Fac̦Ade, Narendra Nallapeta Aswathanarayana Setty
LSU Master's Theses
Ubiquitous computing requires integration of physical space with digital information. This presents the challenges of integrating electronics, physical space, software and the interaction tools which can effectively communicate with the audience. Many research groups have embraced different techniques depending on location, context, space, and availability of necessary skills to make the world around us as an interface to the digital world. Encouraged by early successes and fostered by project undertaken by tangible visualization group. We introduce an architecture of Blades and Tiles for the development and realization of interactive wall surfaces. It provides an inexpensive, open-ended platform for constructing large-scale …
Fundamental Characterization Of Asphalt Mixtures: Warm Mix Asphalt Technologies In Flexible Pavement Systems, Bhanu Vijay Vallabhu
Fundamental Characterization Of Asphalt Mixtures: Warm Mix Asphalt Technologies In Flexible Pavement Systems, Bhanu Vijay Vallabhu
LSU Master's Theses
Increasing concerns on environment and greenhouse effect, coupled with increased construction prices led to the development of new technologies by the Asphalt industry to produce Asphalt Concrete (AC) pavements. Extensive research is being done to evaluate the impact and performance of these new technologies. Warm Mix Asphalt (WMA) is one of these technologies that allow mixing, production, placing and compaction of asphalt mixes at significantly lower temperatures as compared to the traditional Hot Mix Asphalt (HMA) practice. Lower temperatures result in reduced fuel usage, fume exhausts, greenhouse gas emissions, wear and tear at plants; while enhancing worker health and safety …
The Impact Of 5s On The Safety Climate Of Manufacturing Workers, Siddarth Srinivasan
The Impact Of 5s On The Safety Climate Of Manufacturing Workers, Siddarth Srinivasan
LSU Master's Theses
The occupational injury rate in the manufacturing sector is higher than the average of all private industries, necessitating safety studies. Occupational safety can be measured through different approaches. Safety climate, a predictive measure of safety, studies the workers’ perceptions of safety of the workplace. This measure includes several dimensions of safety like management commitment, involvement and work place hazard evaluation and was chosen as a method of evaluation in this study. Even though occupational safety is an important concern, management often prioritizes reducing waste and cost. So, there is a necessity for some technique which reduces waste and simultaneously improves …
Design And Optimization Of 2.5 Dimension Porous Media Micromodel For Nanosensor Flow Experiments, Saade Alexis Bou-Mikael
Design And Optimization Of 2.5 Dimension Porous Media Micromodel For Nanosensor Flow Experiments, Saade Alexis Bou-Mikael
LSU Master's Theses
Micromodels are used to visualize and study pore-scale phenomena such as immiscible displacements in porous media, foam flow behavior, and CO2 flooding. The understanding gained from these experiments can be used to develop models to predict future behavior of the reservoir. Most micromodels are constructed using lithography techniques that are restricted to 2D patterns that require artificial generation or manipulation of images to develop connected micromodels. Characteristics innate to the original rock structure are often lost or skewed in developing micromodels that bear little resemblance to the original media. Alternative microfabrication techniques using a micromilling tool have allowed us to …
Hurricane Damage Assessment Process For Residential Buildings, Carol C. Massarra
Hurricane Damage Assessment Process For Residential Buildings, Carol C. Massarra
LSU Master's Theses
Assessing an affected area immediately after a severe natural hazard event and saving the resulting data are vitally important in any effort to reduce future economic losses from natural hazards. These data are used as a record of buildings performance and as a major component for statistical analysis and damage modeling studies. Since these data are used as input for these studies, the data must be assessed and collected in a scientific and standardized way. Despite this requirement, neither a systematic damage assessment process nor a standardized data collection protocol is currently available in the United States to ensure that …
Base-Caged Adenosine Triphosphate As A Model System For Photoactivatable Small Interfering Rna, Amanda Yoesting Hendrix
Base-Caged Adenosine Triphosphate As A Model System For Photoactivatable Small Interfering Rna, Amanda Yoesting Hendrix
LSU Master's Theses
Photocaged adenosine triphosphate (ATP) is one of the earliest examples of exerting spatial-temporal control over the activity of a substrate. The activity of ATP is blocked until near-ultraviolet light exposure photocleaves the cage moiety. Caged ATP has been used for a myriad of applications including kinetic studies of ATP-dependent enzymes. Traditional caging of ATP occurs at the gamma-phosphate, which has been found to competitively inhibit several enzymatic systems. It was hypothesized that blocking access to the adenosine N6 position via cage molecule would prevent the initial enzyme-substrate binding event from occurring prior to photolysis, effectively minimizing competitive inhibition. Utilizing a …
Non-Rigid Registration Of 2-D/3-D Dynamic Data With Feature Alignment, Huanhuan Xu
Non-Rigid Registration Of 2-D/3-D Dynamic Data With Feature Alignment, Huanhuan Xu
LSU Master's Theses
In this work, we are computing the matching between 2D manifolds and 3D manifolds with temporal constraints, that is we are computing the matching among a time sequence of 2D/3D manifolds. It is solved by mapping all the manifolds to a common domain, then build their matching by composing the forward mapping and the inverse mapping. At first, we solve the matching problem between 2D manifolds with temporal constraints by using mesh-based registration method. We propose a surface parameterization method to compute the mapping between the 2D manifold and the common 2D planar domain. We can compute the matching among …
Characterization Of Nanogumbos For Future Electronic Devices, Naveen Narayan Jagadish
Characterization Of Nanogumbos For Future Electronic Devices, Naveen Narayan Jagadish
LSU Master's Theses
In our work on hybrid (organic-inorganic) electronic materials (HEMs), we have developed a reasonably facile method for characterizing GUMBOS or a Group of Uniform Materials Based on Organic Salts. In addition to the versatility of traditional ionic liquids (i.e.-solubility, melting point, viscosity), NanoGUMBOS are functionalizable to exhibit properties such as fluorescence, magnetic susceptibility, and even antimicrobial activity. However, given our interest in the electrical properties of HEMs, we have made first-time measurements of NanoGUMBOS, using conductive probe Atomic Force Microscopy (CP-AFM), in order to deduce their room temperature current-voltage characteristics. In conjunction with the nanoscale imaging of AFM alone, we …
Design Of Reverse Converters For The Multi-Moduli Residue Number Systems With Moduli Of Forms 2a, 2b - 1, 2c + 1, Naveen Kumar Samala
Design Of Reverse Converters For The Multi-Moduli Residue Number Systems With Moduli Of Forms 2a, 2b - 1, 2c + 1, Naveen Kumar Samala
LSU Master's Theses
Residue number system (RNS) is a non-weighted integer number representation system that is capable of supporting parallel, carry-free and high speed arithmetic. This system is error-resilient and facilitates error detection, error correction and fault tolerance in digital systems. It finds applications in Digital Signal Processing (DSP) intensive computations like digital filtering, convolution, correlation, Discrete Fourier Transform, Fast Fourier Transform, etc. The basis for an RNS system is a moduli set consisting of relatively prime integers. Proper selection of this moduli set plays a significant role in RNS design because the speed of internal RNS arithmetic circuits as well as the …
Rapid Microwave Drying Of Non-Food Agricultural Feedstock For Improved Biofuel Production, Laura A. Picou
Rapid Microwave Drying Of Non-Food Agricultural Feedstock For Improved Biofuel Production, Laura A. Picou
LSU Master's Theses
Due to limited supply of traditional fossil based fuels, and increased interest in air and water quality along with other environmental concerns, there has been a rise in the utilization of biomass based energy sources. Many agricultural materials can be used for the production of biofuels, including materials that are typically underutilized such as sweet sorghum bagasse and otherwise nuisance species such as Chinese tallow tree seeds. The goal of this project was to examine the relationship between the dielectric properties of sweet sorghum bagasse and Chinese tallow tree (CTT) seeds, respectively, and frequency and moisture content; to determine pertinent …
Impact Of Lean Production On Workers' Exposure To Risk In Modular Home Building Manufacturing, Joel James
Impact Of Lean Production On Workers' Exposure To Risk In Modular Home Building Manufacturing, Joel James
LSU Master's Theses
The construction industry records the highest number of work-related injuries and fatalities in the United States according to the Bureau of Labor Statistics. Workers’ exposure to risk may be affected by implementing Lean concepts. This study describes the effects on worker’s safety environment after a Kaizen event, a Lean tool, conducted in three workstations within a modular home manufacturer: base-framing, sheet-rock hanging, and painting. The effects of Lean on safety hazards at each of the three workstations were determined by conducting a Job Safety Analysis (JSA) before and after each Kaizen. Based on the JSAs a risk assessment tool (questionnaire) …
Low-Order Modeling Of Micro-Flier Impact With Thin Stationary Energetic Targets, Mark B. Fry
Low-Order Modeling Of Micro-Flier Impact With Thin Stationary Energetic Targets, Mark B. Fry
LSU Master's Theses
The impact of high-speed (500-1500 m/s), laser driven micro-fliers with thin energetic targets (10-100 &# 956;m) is being examined to characterize impact-induced heating and combustion of these materials. Aluminum fliers are propelled by a laser into a thin metallic target plate having a layer of energetic material deposited on its backside. Mass spectrometry is performed in vacuo on the energetic side to interrogate the shock-induced chemistry of the energetic material. It is important to ignite and possibly detonate the energetic material without perforation of the target plate avoiding contamination of the vacuum chamber. To guide development of these experiments, a …
Combinatorial Multi-Level Mold Inserts Using Micro Machining And X-Ray Lithography, Oblesh Jinka
Combinatorial Multi-Level Mold Inserts Using Micro Machining And X-Ray Lithography, Oblesh Jinka
LSU Master's Theses
The present technology advancement in biomedical, micro-electro-mechanical systems (MEMS) engineering, bio-MEMS, healthcare, etc. is driving the need to fabricate devices with multi-level, high aspect ratio and complex microstructures, which in turn requires high quality mold inserts with all these features. The present thesis is concentrated in fabricating a multi-level mold insert with complex quasi 3 dimensional micro structures with dimensions down to 10µm and aspect ratios greater than 30 using a process combination of micro milling with X-ray lithography. Therefore, in this study the main focus was to fabricate a high quality mold insert template, which can be electroplated to …
Biodiesel Production From Microalgae: Co-Location With Sugar Mills, Christian Lohrey
Biodiesel Production From Microalgae: Co-Location With Sugar Mills, Christian Lohrey
LSU Master's Theses
Co-location of algae production facilities with sugarcane mills in Louisiana was investigated as a way to address the bottlenecks for algal biodiesel production. Using the process modeling software Sugars™, an algal biodiesel production process was integrated with the operation of a typical-sized 10,000 metric tons/day (11,000 short tons/day) sugarcane mill to evaluate material and energy balances. A process is proposed wherein alga production is supplemented with energy, water, and CO2 available from a sugarcane mill. The Energy Return on Invested, EROI (a ratio of the energy produced/energy required) of the proposed algal biodiesel production process was 1.25; meaning 25% more …
Modulation Of Mesenchymal Stem Cell Behavior By Nano And Micro-Sized Beta-Tricalcium Phosphate Particles In Suspension And Composite Structures, Lekeith Terrell
Modulation Of Mesenchymal Stem Cell Behavior By Nano And Micro-Sized Beta-Tricalcium Phosphate Particles In Suspension And Composite Structures, Lekeith Terrell
LSU Master's Theses
Nano and micro particles have steadily grown in interest for synthetic bone composite structures. Nano and micro sized calcium phosphates especially are of interest because of the osteoinductive behavior of calcium phosphate. Engineered composites incorporating polymers and ceramics, such as poly l-lactic acid (PLLA)/β-TCP, for bone tissue regeneration have been well investigated for their proliferative and osteoinductive abilities. Limited research has been done to thoroughly investigate the effects of various sized β-TCP particles on human mesenchymal stem cell behavior. Foreign bodies are known to elicit an inflammatory and cytotoxic response and several nano-particles are known to elicit cytotoxic and pro-inflammatory …
Evaluation Of Phosphorous And Nitrogen Removal In Alligator And Dairy Wastewater Via Lime And Bentonite Precipitation, Srikanth Bukkapatnam Tirumala
Evaluation Of Phosphorous And Nitrogen Removal In Alligator And Dairy Wastewater Via Lime And Bentonite Precipitation, Srikanth Bukkapatnam Tirumala
LSU Master's Theses
In many situations, the manure produced by confined animal feeding operations (CAFO) needs to be treated before being land applied in order to prevent negative impacts on the environment. Treatment methods are focused on reducing organics, recovering nitrogen and phosphorous. The purpose of this study is to evaluate the efficacy of burnt-lime (Ca(OH)2) and bentonite clay precipitation system of recovering phosphorous from dairy wastewater and alligator wastewater and trapping any possible emissions of ammonia (NH3). Wastewater samples of flush dairy manure from a collection pit, dairy wastewater from an anaerobic lagoon and alligator wastewater from an anaerobic lagoon were investigated …
The Effect Of Elevated Water Content On Ethanol Combustion, Baine Bernard Breaux
The Effect Of Elevated Water Content On Ethanol Combustion, Baine Bernard Breaux
LSU Master's Theses
Ethanol is currently being considered as a potential alternative to traditional fuels. However, the fuel offers a low return in terms of energy output per dollar invested when compared to fossil fuels. More than 1/3 of the cost associated with bio-ethanol production is devoted to distillation and water removal. This study seeks to validate the use of hydrous ethanol as a practical fuel to be used in lieu of fossil fuels or anhydrous ethanol. Success would reduce the production cost associated with ethanol fuel. Hydrous ethanol was burned in a swirl-stabilized combustor, air is introduced at a constant flow rate …
A Method To Improve Interest Point Detection And Its Gpu Implementation, Prabakar Karuppannan Gunashekhar
A Method To Improve Interest Point Detection And Its Gpu Implementation, Prabakar Karuppannan Gunashekhar
LSU Master's Theses
Interest point detection is an important low-level image processing technique with a wide range of applications. The point detectors have to be robust under affine, scale and photometric changes. There are many scale and affine invariant point detectors but they are not robust to high illumination changes. Many affine invariant interest point detectors and region descriptors, work on the points detected using scale invariant operators. Since the performance of those detectors depends on the performance of the scale invariant detectors, it is important that the scale invariant initial stage detectors should have good robustness. It is therefore important to design …
Double-Bond Isomerization Of Long Chain Olefins, James Edward Bruno
Double-Bond Isomerization Of Long Chain Olefins, James Edward Bruno
LSU Master's Theses
Bruno, James Edward, B.S., Western Michigan University, 2010 Master of Science, Fall Commencement, 2012 Major: Chemical Engineering Double-Bond Isomerization of Long Chain Olefins Thesis directed by Professor Kerry Dooley Pages in thesis, 54. Words in Abstract, 349. ABSTRACT Alkenyl Succinic Anhydride (ASA) is commonly used in the paper industry as a sizing agent. ASA is produced by reacting maleic anhydride with long-chain internal olefins. Such olefins are only available with the double bond in the terminal position, so an isomerization step is necessary. The isomerization can be catalyzed using solid strong acid catalysts, such as those containing sulfonic acid groups. …
Boron Composite Nanoparticles For Enhancement Of Bio-Fuel Combustion, Neng Wang
Boron Composite Nanoparticles For Enhancement Of Bio-Fuel Combustion, Neng Wang
LSU Master's Theses
Bio-fuels such as ethanol are good candidates to replace fossil fuels, which are being depleted, and whose combustion is associated with net production of greenhouse gases and other environmental issues. However, bio-fuels have low energy densities and can be subject to incomplete combustion. Boron is a promising additive for bio-fuels in combustion applications. It can increase their overall heat release and reduce ignition temperature, because boron itself is among the highest energy density materials. In this study, different B/rare earth oxide and B/Fe composite nanoparticles were produced by simple mechanical milling. Also, a new low temperature milling method was developed …
Factors Controlling Macondo Oil Biodegraqdation On A Rapidly Eroding Coastal Headlands Beach, Marilany G. Urbano
Factors Controlling Macondo Oil Biodegraqdation On A Rapidly Eroding Coastal Headlands Beach, Marilany G. Urbano
LSU Master's Theses
Fourchon Beach, located along the southeast Louisiana coast, was affected by the oil leaking from the British Petroleum’s Deepwater Horizon Oil rig explosion in 2010. The oil, labeled MC252 oil, came ashore in a stable emulsion form, contaminating the sand, salt pan, marsh and mangroves along the beach. A unique oil form, labeled SSRB (small surface residue ball) was formed from the MC252 oil and a combination of environmental factors. The SSRB is an aggregate of sand and emulsified oil, and forms a large portion of the oil still present on the supratidal zone of Fourchon Beach. SSRBs have not …
A Novel Rna Extraction Method For Cyanobacteria, Zenghui Zhang
A Novel Rna Extraction Method For Cyanobacteria, Zenghui Zhang
LSU Master's Theses
Research on production of polyhydroxyalkanoates (PHA) by microorganisms has captured attention over the last two decades, since PHA have similar properties as petroleum-based thermoplastics, yet are close to carbon neutral and made from renewable sources. Cyanobacteria are considered to be good PHA producers because of their simple nutrient requirements (mainly water, sunlight and CO2) and fast cell growth. However, knowledge of metabolisms behind PHA production by cyanobacteria is limited. Therefore, gene expression analysis of cyanobacteria is required to get a thorough understanding at the molecular level, and gene expression analysis requires the extraction of high quality RNA. Extracting high quality …
Applications Of Cfd Simulations On Microfluidic Systems For Nanoparticle Synthesis, Yuehao Li
Applications Of Cfd Simulations On Microfluidic Systems For Nanoparticle Synthesis, Yuehao Li
LSU Master's Theses
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 …
A Review Of Offshore Blowouts And Spills To Determine Desirable Capabilities Of A Subsea Capping Stack, Louise Matilde Smith
A Review Of Offshore Blowouts And Spills To Determine Desirable Capabilities Of A Subsea Capping Stack, Louise Matilde Smith
LSU Master's Theses
The events surrounding the Deepwater Horizon disaster have changed the face of deepwater operations. In order to continue drilling in the Gulf of Mexico, the regulatory body, the Bureau of Safety and Environmental Enforcement (BSEE), has required that applications to conduct work in the Gulf of Mexico (GOM) include a plan to stop, capture, or contain any uncontrolled release of fluids. The capping and containment systems built and implemented by BP during the event are an excellent starting point for minimizing pollution from deepwater subsea blowouts, but the system has limitations. The industry recognizes these limits but is currently focused …
Consensusability Of Discrete-Time Multi-Agent Systems, Abhishek Pandey
Consensusability Of Discrete-Time Multi-Agent Systems, Abhishek Pandey
LSU Master's Theses
The study of multi-agent systems (MAS) focuses on systems in which many intelligent agents interact within an environment. The agents are considered to be autonomous entities. MAS can be used to solve problems that are difficult or impossible for an individual agent to solve. The main feature which is achieved when developing MAS, if they work, is flexibility, since MAS can be added to, modified and reconstructed, without the need for detailed rewriting of the application. MAS can manifest self-organization as well as self-steering related complex behaviors even when the individual strategies of all their agents are simple. The goal …
Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography, Francis Williams Hutchinson
Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography, Francis Williams Hutchinson
LSU Master's Theses
Hutchinson, Francis Williams, B.G.S., Louisiana State University, 1989 Master of Science in Industrial Engineering, Summer Commencement, 2012 Major: Industrial Engineering Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography Thesis directed by Professor Fereydoun Aghazadeh, Ph.D., PE Pages in thesis, 86. Words in abstract, 253. ABSTRACT Industrial valve handwheels are in common use in many industries to block, allow, or regulate the flow of materials within a system. Significant numbers of musculoskeletal disorders have been attributed to turning valve handwheels. The torques encountered to “break” and/or turn these handwheels often exceeds 100 Nm …
Effect Of Electrical Vehicles On Residential Distribution Systems, Paul Haley
Effect Of Electrical Vehicles On Residential Distribution Systems, Paul Haley
LSU Master's Theses
This thesis focuses on the present state of electrical vehicles (EVs) in the market and the effects that these vehicles could have on residential distribution systems. The current EVs available on the market and the current level of market penetration were investigated. Advantages and disadvantages of EVs from a consumer and governmental perspective were identified. The efficiencies of the whole energy delivery process of electrical vehicles and gasoline vehicles were estimated. Efficiency estimation was used to estimate the impact of EVs on the consumption of fossil fuels and emission of greenhouse gases. Measurement of an EV battery charging cycle and …
Shear Strength Evaluation Of An Erosional Soil System At Fourchon Beach, Jacques Pierre Boudreaux
Shear Strength Evaluation Of An Erosional Soil System At Fourchon Beach, Jacques Pierre Boudreaux
LSU Master's Theses
South Louisiana is vanishing. Subsidence due to relative sea level rise with erosion of weak wetland soils together produce devastating rates of land loss for this area. It is believed that high rates of erosion are due to weak strength properties of fine-grained sediments in the beaches, marshes, and other wetlands in coastal Louisiana. Wave action is known to initiate the movement of weak coastal soils in a manner that is related to the difference between the shear stresses applied by waves and the critical shear strength of erosional sediments. Direct shear tests were performed on samples obtained from the …