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Effect Of Hydrated Lime On The Laboratory Performance Of Superpave Mixtures, Md Sharear Kabir
Effect Of Hydrated Lime On The Laboratory Performance Of Superpave Mixtures, Md Sharear Kabir
LSU Master's Theses
Permanent deformation and moisture damage are the most common distresses found in asphalt pavements today. Extensive experimental studies have revealed that the use of hydrated lime in Hot-Mix Asphalt (HMA) mixtures can reduce permanent deformation, long-term aging, and moisture susceptibility of mixtures. In addition, it increases the stiffness and fatigue resistance of mixtures. The objectives of this study were to evaluate (1) the fundamental engineering properties of HMA mixtures containing hydrated lime compared to conventional mixtures designed to meet the current Louisiana Superpave specifications and (2) the influence of the method of addition of hydrated lime on the mechanical properties …
Characterization And Development Of Axle Load Spectra To Enhance Pavement Design And Performance On The Basis Of New Mechanistic-Empirical Design Guide In Louisiana, Bharath Kumar Sridhar
Characterization And Development Of Axle Load Spectra To Enhance Pavement Design And Performance On The Basis Of New Mechanistic-Empirical Design Guide In Louisiana, Bharath Kumar Sridhar
LSU Master's Theses
For pavement design practices, several factors must be considered to ensure good performance of the pavement over the anticipated life cycle. Such factors include, but are not limited to, the type of paving materials, traffic loading characteristics, prevailing environmental conditions, and others. Traditional pavement design practices have followed the standards set by the American Society of State Highway and Transportation Officials (AASHTO) which require the use of an equivalent single axle load (ESAL - 18 kip single axle load) for design traffic input. Recently, a new mechanistic-empirical pavement design guide (MEPDG) was developed to improve pavement design practices. The guide …
Nanoclay Syntactic Foam Composites, Sameer Leo Peter
Nanoclay Syntactic Foam Composites, Sameer Leo Peter
LSU Master's Theses
Syntactic foams are composite materials in which the matrix phase is reinforced with hollow particles called microballoons. They possess low moisture absorption, low thermal conductivity and high damage tolerance because of their compositions. Traditionally, syntactic foams are used in many high strength applications such as in aerospace and marine industries, thus there is a need to achieve both high compressive strength and high fracture strain with minimal increase in density. This research studies the effect of nanoclay on the high strain rate mechanical properties of syntactic foams. Nanoclay reinforced syntactic foams are fabricated by adding 1, 2 and 5% volume …
Exploring Stochastic Characteristics Of Freeway Traffic Breakdown And Recovery Conditions, Chaitanya Mamidala
Exploring Stochastic Characteristics Of Freeway Traffic Breakdown And Recovery Conditions, Chaitanya Mamidala
LSU Master's Theses
In recent times, the term ‘congestion’ has gained a lot of attention due to its negative impact on the mobility and efficiency of transportation network. Congestion control and mitigation of its effects has become a prime concern to many transportation agencies. With breakthroughs in transportation technologies, effective management and utilization of existing infrastructure capacities has been possible. One of the key functions of technological advancements is the ability to understand the different characteristics of traffic that prevail on major freeways and arterials, and to model short-term predictions of traffic conditions with reasonable accuracy. Providing accurate, real-time information makes travelers aware …
Freezing Processes In Cell Suspensions Evaluated Using Cryomicroscopy, Tathagata Acharya
Freezing Processes In Cell Suspensions Evaluated Using Cryomicroscopy, Tathagata Acharya
LSU Master's Theses
This thesis aims at evaluating the freezing response of three different cell types, Pacific Oyster embryos, Jurkats and Helas, using the technique of cryomicroscopy. The choice of cells was primarily based on supporting ongoing research work at the Bioengineering Laboratory, Department of Mechanical Engineering at Louisiana State University in Baton Rouge. On a secondary basis, the cells were chosen based on their contrasting nature. While Pacific Oyster being a favorite food in USA calls for successful techniques of cryopreservation of their embryos in order to keep up with the growing demand, Jurkat and HeLa are undesired malignant human cells that …
High Strain Rate Characteristics Of Rubber Modified Syntactic Foams, Paul Wehmer
High Strain Rate Characteristics Of Rubber Modified Syntactic Foams, Paul Wehmer
LSU Master's Theses
This thesis deals with the characterization of hybrid syntactic foams under high strain rates (HSR) ranging from 450/s to 1000/s. The foams studied are comprised of epoxy resin matrix filled with 63% volume fraction glass microspheres and 2% volume fraction of ground rubber fragments. The focus of this study is to compare the strength, ultimate strain, and modulus of these composite materials at high strain rates and quasi-static conditions and to find out the effects of HSR on the failure mode and fracture behavior of these materials. Split Hopkinson Pressure Bar (SHPB) apparatus is used for the HSR testing. Foams …
Pilot-Scale Study On Anaerobic Digestion Applied To A Saline Industrial Waste Activated Sludge, Changjiang Shen
Pilot-Scale Study On Anaerobic Digestion Applied To A Saline Industrial Waste Activated Sludge, Changjiang Shen
LSU Master's Theses
In the field of municipal wastewater treatment, anaerobic digestion is a well-established, effective process for stabilization of organic sludge with the attractive features of low operating costs and production of methane as a useful by-product. Application of anaerobic digestion for the treatment of saline industrial wastewater sludge, however, has not been well established. The studies described in this thesis were conducted with the overall goal of assessing the feasibility of mesophilic anaerobic digestion processes for treatment of waste activated sludge (WAS) containing moderate salinity (approximately 3% m/v). Experiments employed two 30-gallon conical-bottom HDPE reactors. In the first phase of testing, …
Experimental And Numerical Investigation Of Fluid Flow And Heat Transfer In Microchannels, Wynn Allen Phillips
Experimental And Numerical Investigation Of Fluid Flow And Heat Transfer In Microchannels, Wynn Allen Phillips
LSU Master's Theses
Microchannels are of current interest for use in heat exchangers where very high heat transfer performance is desired. Microchannels provide very high heat transfer coefficients because of their small hydraulic diameters. In this study, an investigation of fluid flow and heat transfer in microchannels is conducted. A review of the literature published regarding fluid flow and heat transfer in microchannels is provided in this study. A thorough background on the theory of internal convective heat transfer is provided as well. A critical analysis of some of the published heat transfer experiments on microchannels is also given. It was found that …
Characterization Of Hma Mixtures Containing High Recycled Asphalt Pavement Content With Crumb Rubber Additives, Samuel B. Cooper, Jr.
Characterization Of Hma Mixtures Containing High Recycled Asphalt Pavement Content With Crumb Rubber Additives, Samuel B. Cooper, Jr.
LSU Master's Theses
As the price of petroleum and material costs escalate and pressures of maintaining the sustainability of our environment, owners must continually find methods to decrease material costs and maximize their benefits. One such method is to increase and/or begin using readily available recycled materials like reclaimed asphalt pavements (RAP) and crumb rubber (CR). The objective of this study was to fundamentally characterize the laboratory performance of conventional HMA mixtures and mixtures containing high RAP content and waste tire crumb rubber/additives through their fundamental engineering properties. A Superpave l9-mm nominal maximum aggregate size (NMAS) Level 2 HMA mixture meeting LADOTD specification …
Fabrication Of Micro Bumps For Micro Scale Thermal Management, Ajay Ashok Kardak
Fabrication Of Micro Bumps For Micro Scale Thermal Management, Ajay Ashok Kardak
LSU Master's Theses
Cryopreservation is storage of biological systems at ultra low temperatures for a prolonged duration; such that they can be thawed and restored to the same living state. It is important to understand the behavior of cells when they are subjected to subzero temperatures. Research in this area has shown the occurrence of two main biophysical events; cellular dehydration and intracellular ice formation. Current techniques for characterizing the dehydration in cells as part of a tissue are not adequate for studying intracellular ice formation in tissues. An integrated device consisting of an array of thermal sensors (microthermocouples) and actuators (microthermoelectric coolers) …
Design And Realization Of An Electrophoretron Cycler, Celine Raymonde Ramet
Design And Realization Of An Electrophoretron Cycler, Celine Raymonde Ramet
LSU Master's Theses
Polymerase Chain Reaction (PCR) is a powerful enzymatic reaction commonly used to amplify specific sequences of Deoxyribo Nucleic Acid (DNA). Since the introduction of the lab on a chip concept, numerous Continuous Flow PCR cyclers were realized with success at the micro scale. As reducing the reactor size and improving thermal management led to reduced sample volumes, results could be achieved much faster with these CF-PCR cyclers than with common commercial cycler. Furthermore, most of these demonstrated CF-PCRs are nowadays evolving towards high-throughput systems. However, most CF-PCR cyclers require complex manipulations and are not flexible (e.g. fixed number of cycles, …
Analysis Of Gas Dynamic Waves In Explosively Actuated Valves, Blaise H. Paul
Analysis Of Gas Dynamic Waves In Explosively Actuated Valves, Blaise H. Paul
LSU Master's Theses
A mathematical model is formulated for assessing quasi-one-dimensional gas dynamics occurring within axis-symmetric explosively actuated valves. The model describes complete valve operation and accounts for pressure-dependent explosive combustion within an actuator, compressible product gas flow within the actuator, through a small port, and into and within a gas expansion chamber. The gas dynamic waves induce piston motion at the terminal end of the expansion chamber which is needed for valve operation. The model is mathematically posed as an initial-boundary-value problem in terms of generalized coordinates to facilitate numerical computations on a domain that volumetrically expands due to combustion and piston …
Impact Damage Between The Collision Of A Vessel And Protective Fender Systems, Paul Joseph Kocke
Impact Damage Between The Collision Of A Vessel And Protective Fender Systems, Paul Joseph Kocke
LSU Master's Theses
Vessel collision with bridge pilings can cause a catastrophic event and are occurring at an alarming rate. Such events can lead to the collapse of a bridge, causing deaths, shutting down a primary route of transportation and costing millions of dollars in repairs. Today, the AASHTO Bridge Code gives designers a methodology toward designing bridge pilings to withstand the impact of an errant vessel. However, bridges designed before this code was written require a protective system that is capable of redirecting a colliding vessel without causing severe damage to the pilings or the vessel. This research will look into three …
Design And Testing Of An Infrared Temperature System To Test The Effects Of Chemical Stimulation On Heat Production In Cell Cultures, Nicholas Gerbo
Design And Testing Of An Infrared Temperature System To Test The Effects Of Chemical Stimulation On Heat Production In Cell Cultures, Nicholas Gerbo
LSU Master's Theses
Temperature is an important physiological parameter of cell biology. The thermal energy output of cells in vitro can offer insight into cellular processes. Standard methodology of measuring cellular thermal output has been through microcalorimetry. In this work, infrared thermography is presented as an alternative to microcalorimetry and other measurement techniques. An enclosure that controls the temperature of cells and allows for injection of temperature control of chemical agents and subsequent measurement of cell temperature using an infrared camera has been designed and tested. The enclosure was tested with 3T3-L1 adipocytes treated with the β3 adrenergic agonist CL 316-243 for up …
The Design And Fabrication Of Pentacene Acoustic Charge Transfer Devices, Hua Shao
The Design And Fabrication Of Pentacene Acoustic Charge Transfer Devices, Hua Shao
LSU Master's Theses
Acoustic charge transport (ACT) devices are used to transfer electrical signals by surface acoustic waves (SAW), which are generated by interdigital transducers (IDT) on piezoelectric crystal substrates. In order to reduce fabrication cost, pentacene ACT is desired to transfer charge packages because of its reduced cost in. As some researchers reported, pentacene is a p type organic semiconductor, and can get high carrier mobility by growing in very pure crystalline structure under some specified growing conditions. In this project, charge transfer channel was made of crystal pentacene to form and carry the charge packages following SAW propagation. The pentacene ACT …
Enhancing Security In Quantum Cryptography, Partha Basuchowdhuri
Enhancing Security In Quantum Cryptography, Partha Basuchowdhuri
LSU Master's Theses
Quantum Key Distribution was named as one of the top ten emerging technologies by Technology Review Journal in 2003 in their annual edition. The growth in quantum cryptography since the beginning of the millennium has been expedited by new theories and ideas. The introduction of practical quantum cryptosystems offered by USA based company MagiQTech and its European rival idQuantique has changed the face of cryptography. With active experimental research in USA, Europe, Japan and Singapore, the scope of quantum cryptography seems to be growing daily. When Bennett and Brassard proposed their BB84 protocol in Bangalore in 1984, no one would …
Adjustable Speed Drives Laboratory Based On Dspace Controller, Kiran Kumar Gunda
Adjustable Speed Drives Laboratory Based On Dspace Controller, Kiran Kumar Gunda
LSU Master's Theses
This thesis refers to the EE 4490 Adjustable Speed Drives course, which is taught at Louisiana State University (LSU). The part of this course is variable speed AC and DC drives laboratory. The objective of this thesis is to modify the existing DSP Based Electric Drives Lab Manual developed by Department of Electrical and Computer Engineering, University of Minnesota in order to adjust it to the EE 4490 course syllabus and to verify the experiments by carrying out the tests on the lab equipment available at the Elec. & Comp. Eng. Dept at LSU. There are four major components, of …
Modeling The Relationship Among Occupational Stress, Psychological/Physical Symptoms And Injuries In The Construction Industry, Omosefe Osarieme Abbe
Modeling The Relationship Among Occupational Stress, Psychological/Physical Symptoms And Injuries In The Construction Industry, Omosefe Osarieme Abbe
LSU Master's Theses
The construction industry has one of the highest incidents of fatal and non-fatal accidents/injuries every year. As a high risk industry, there is a need to investigate factors that affect the occurrence of these accidents to be able to protect workers. Traditional approaches to workers’ safety in the construction industry have focused on the physical and biomechanical aspects of work by improving tools, equipment and task completion methods. However, the impact of psychosocial factors, specifically stress as experienced by construction workers is an area of growing research. Research in the area of occupational stress in the Construction Industry is yielding …
Experimental Study Of A Foam Flow In Horizontal Pipes: Two Flow Regimes And Its Implications, Miodrag Bogdanovic
Experimental Study Of A Foam Flow In Horizontal Pipes: Two Flow Regimes And Its Implications, Miodrag Bogdanovic
LSU Master's Theses
Although foam has been widely used in many scientific and engineering applications, the current understanding of foam rheology in pipes is still very limited because of its complex nature. This experimental study, for the first time, investigates the flow rheology of foams in pipes by placing a special emphasis on two distinct foam flow regimes. A wide range of experimental conditions are examined in this study, which include five different surfactant formulations (Cedepal FA-406, Petrostep CG-50, Stepanform 1050, Aquet TD-600, and Ultra-Palmolive), three different surfactant concentrations (0.1, 1, and 5 wt %), two different pipe diameters (0.5 and 1 inch …
Parametric Study Of A Pulsed Vertical Jet In Cross-Flow, Guillaume Francois Bidan
Parametric Study Of A Pulsed Vertical Jet In Cross-Flow, Guillaume Francois Bidan
LSU Master's Theses
The potential of pulsed vertical jet in cross-flow for film cooling purposes was experimentally studied and is discussed in this Thesis. A single vertical jet placed in laminar cross-flow conditions was first characterized in steady state at relatively low blowing ratios ranging from 0.150 to 0.600, using Mie scattering visualization methods and hot-wire measurements. Wavelet spectral analysis and image quantification algorithms were applied to the velocity records and averaged visualizations to obtain quantitative data on the jet characteristic frequencies, penetration and coverage. Two different regimes characterized by different structures are identified and adapted scaling variables are provided. Trends in the …
Quantification Of Tars And Particulates From A Pilot Scale, Downdraft Biomass Gasifier, Christopher Osita Akudo
Quantification Of Tars And Particulates From A Pilot Scale, Downdraft Biomass Gasifier, Christopher Osita Akudo
LSU Master's Theses
Alternative energy production through biomass gasification produces combustible gases, such as carbon monoxide, hydrogen, and methane. These gases can be used for generation of direct heat, electricity, or liquid fuels through the Fischer Tropsch process. However, a major limitation of the overall process is the purity of the generated synthesis gas. The tars and particulates generated in the gasification process constitute a major impediment to the commercial use of this technology because they may condense on valves, fittings, and therefore, hinder the smooth running of an engine. This research was aimed at developing a gas characterization and testing protocol, and …
A Capacity-Approaching Coded Modulation Scheme For Non-Coherent Fading Channels, Youngjeon Cho
A Capacity-Approaching Coded Modulation Scheme For Non-Coherent Fading Channels, Youngjeon Cho
LSU Master's Theses
Approaching the Shannon limit of the communication channels has been studied by many researchers to efficiently and reliably transmit data through the channels. To solve this problem, various methods and schemes have been proposed for approaching the theoretical limit for Shannon’s channel capacity. Among them, both low-density parity check (LDPC) codes and Turbo codes have been proposed to minimize the bit error rate (BER). Therefore, understanding of LDPC codes and Turbo codes is useful for their applications in modern communication systems. The study about non-coherent channels, which do not require explicit knowledge or estimation of the channel state information, has …
Factors Affecting Young Driver Safety In The State Of Louisiana, Cherian Cherian-Korah
Factors Affecting Young Driver Safety In The State Of Louisiana, Cherian Cherian-Korah
LSU Master's Theses
Though teenage drivers constitute only 6.4 percent of the total drivers in United States, they are responsible for 14 percent of the fatal crashes and are involved in 18 percent of all police-reported crashes in the country. One of the main causes of teenage crashes was found to be the presence of passengers in the vehicle. This study is focused on the effect of passengers on young drivers in the state of Louisiana. There have been efforts from traffic safety departments to contain crashes involving this age group of drivers and, particularly the Graduated Driver's License Law, which imposes restrictions …
Evaluation Of Sweep Efficiency Of A Mature Co2 Flood In Little Creek Field, Mississippi, Didem Senocak
Evaluation Of Sweep Efficiency Of A Mature Co2 Flood In Little Creek Field, Mississippi, Didem Senocak
LSU Master's Theses
CO2 displacement is the most widely used EOR process, but poor sweep efficiency and large CO2 utilization rates are limitations to the economic and technical success of CO2 floods. Developing a methodology to maximize the sweep efficiency and minimize the CO2 utilization rate would greatly improve the economics of these fields. This thesis evaluates the sweep efficiency of a successful, late-in-life, continuous injection CO2 flood at the Little Creek Field, Mississippi. In this work, we evaluate several heterogeneity measures in terms of recovery efficiency and utilization rate. Core studies available from 41% of the wells in the field were used …
Application Of The Hyman Model To Evaluate The Water And Salt Budgets In Three Mangrove Sites Along Shark River, Everglades, Cheng-Feng Tsai
Application Of The Hyman Model To Evaluate The Water And Salt Budgets In Three Mangrove Sites Along Shark River, Everglades, Cheng-Feng Tsai
LSU Master's Theses
Mangrove trees play an important role in the maintenance and sustainability of coastal wetlands due to their ability to adapt and survive in a wide range of saline and tidal conditions. Hydrologic processes (e.g., inundation frequency) and salinity are important regulators controlling the growth and productivity of mangrove forests. To quantify how changes in landscape-level hydrology will influence these regulators in mangrove forests, the hydrology model (HYMAN) was applied to three sites with distinct tidal forcings along the Shark River estuary in the Everglades National Park. HYMAN model uses mass balance equation to determine daily water and salt budgets as …
Magnetic Field Effects On Diffusion Flames, Diego F. Gonzalez
Magnetic Field Effects On Diffusion Flames, Diego F. Gonzalez
LSU Master's Theses
Magnetic field effects in combustion is an area of study that has previously been overlooked. The influence of magnetic fields on flames has only recently been explored and is of interest both from a scientific and a practical standpoint. This study provides theoretical, numerical and experimental evidence that combustion can be affected with the use of suitable magnetic fields. This thesis focuses on four different types of magnetic field: homogeneous, gradient, oscillating and pre-combustion. For the homogeneous field case, the Gibbs Free Energy method was used to determine the mole fraction of product species. It was found that homogeneous fields …
Experimental Investigation Of Unsaturated Soil Stiffness, Ananth Bukkapatnam Tirumala
Experimental Investigation Of Unsaturated Soil Stiffness, Ananth Bukkapatnam Tirumala
LSU Master's Theses
Soil stiffness is a strain dependent non-linear parameter. Stiffness is the measure of soil deformation under a particular working load. It can used for predicting ground deformation in engineering earthworks such as highway embankments and foundations. Non-linear analyses for ground behavior have been widely used for developing models to predict the small –strain characteristics of the soil (Atkinson, 2000). This thesis provides a new insight into the behavior of soil stiffness. We used the wave propagation technique to determine the stiffness and term it as the small strain shear modulus (Gmax) of the soil. The objective of the thesis was …
Photocatalytic Oxidation Of Ethanol Using Macroporous Titania, Gibert Merle Magpantay
Photocatalytic Oxidation Of Ethanol Using Macroporous Titania, Gibert Merle Magpantay
LSU Master's Theses
Photocatalytic oxidation (PCO) using TiO2 is a potential means of remediating poor indoor air quality that is attributed to low levels of volatile organic compounds (VOC). In this work, ethanol is chosen as a simple compound representative of VOC’s. The aim of this research is to establish a baseline for the photocatalytic activity of TiO2 in ethanol PCO as well as the photonic efficiency of the photoreactor. The PCO conversion could then be enhanced by using photocatalyst having a macroporous structure. A flat plate photoreactor, UV light delivery and a flow system was designed in this work to accomplish ethanol …
Fog-Smog Reactor And Photooxidation Of Naphthalene Within The Fog Condensate In A Uv Light Setup, Neha Shrikant Damle
Fog-Smog Reactor And Photooxidation Of Naphthalene Within The Fog Condensate In A Uv Light Setup, Neha Shrikant Damle
LSU Master's Theses
Polycyclic aromatic hydrocarbons (PAHs) form a major class of air pollutants. Naphthalene is a commonly found PAH in the atmosphere. Atmospheric fog water contains naphthalene absorbed from surrounding air. The partition coefficient of naphthalene is defined as the ratio of total naphthalene concentration in fog water to total naphthalene concentration in air. The purpose of this research was to determine the partition coefficients of naphthalene for varying reactor temperature. Fog was artificially formed in a predesigned reactor. NaCl aerosols were used as condensation nuclei for fog formation. Fog droplets were exposed to naphthalene vapors in the reactor. The reactor provided …
Design, Fabrication, And Testing Of A Micro Fuel Injection Swirler For Lean Premixed Combustion In Gas Turbine Engines, Anthony Louis Giglio
Design, Fabrication, And Testing Of A Micro Fuel Injection Swirler For Lean Premixed Combustion In Gas Turbine Engines, Anthony Louis Giglio
LSU Master's Theses
Due to growing energy demands and the need for increased fuel consumption efficiency, environmental protection agencies are imposing more stringent emissions regulations on gas turbine combustion systems with emphasis on NOx emissions reduction. Emerging technological combustion schemes to reduce NOx commonly employ lean premixed combustion. Decreases in NOx are globally obtained by flame temperature decrease and locally improved by homogeneity of the reacting mixture. A new micro fuel injection swirler, capable of providing efficient and rapid mixing over a short distance, is presented in this thesis. The conception of the Micro Fuel Injection Swirler (MFIS) was motivated by the need …