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Articles 241 - 270 of 406
Full-Text Articles in Civil and Environmental Engineering
Environmental Factors Impacting Coastal Beach Health, Kevin Michael Chenier
Environmental Factors Impacting Coastal Beach Health, Kevin Michael Chenier
LSU Master's Theses
The objectives of this research were to 1) determine the variability of fecal-indicator bacteria in Gulf of Mexico marine waters, 2) determine the effect of environmental variables on enterococci concentrations, 3) determine if beach sand at Holly Beach, LA was capable of acting as a reservoir for fecal-indicator bacteria, and 4) determine if a model could be developed to reduce the time it takes to issue a beach swim advisory. Fecal-indicator bacteria concentrations varied from year to year in historical data collected from a Gulf Coast beach. Afternoon fecal-indicator bacteria concentrations were consistently lower than morning concentrations, demonstrating daily variability. …
Measurement Of Spatial Variation Of Density Of Compacted Powder Using Synchrotron Microtomography, Yi Yang
Measurement Of Spatial Variation Of Density Of Compacted Powder Using Synchrotron Microtomography, Yi Yang
LSU Master's Theses
This research considers density change in powder metallurgy when compacting a powder blend in a die. In order to provide insights into particle behavior during compaction, atomized aluminum powders with an average particle size of 100 µm were used in two different compaction configurations. The compaction dies are cylindrical in shape: compaction configuration I displays an upper punch, a die, a lower punch, and a spacer. Compaction configuration II displays an upper punch, two dies, a lower punch, and a spacer with different geometry. The Synchrotron Microtomography scans were conducted on both compaction configurations. For compaction configuration I, the scan …
Building Information Management (Bim) Implementation In Naval Construction, Raymond Rohena
Building Information Management (Bim) Implementation In Naval Construction, Raymond Rohena
LSU Master's Theses
Traditional two-dimensional (2D) delivery systems in the construction industry can hinder the way information is communicated between owners, architects, and contractors. This hindrance exists in all phases of a project, from design and construction to the operation and maintenance of the completed facility. Building Information Management (BIM) is an emerging information technology that promotes a collaborative process for the Architectural, Engineering, Construction and Facilities Management (AECFM) industry; it can aid the exchange of information and provide improved project data accessibility to all stakeholders of a construction project. The Naval Facilities Engineering Command (NAVFAC), in conjunction with the facility management (FM) …
Modeling Of First-Flush Reactor For Stormwater Treatment, Shaowei Sun
Modeling Of First-Flush Reactor For Stormwater Treatment, Shaowei Sun
LSU Master's Theses
Stormwater runoff is one of the most common sources of non-point source water pollution to lakes, rivers and estuaries. Nitrate-nitrogen in stormwater runoff is an important limiting factor to the eutrophication phenomenon. While most pollutants and nutrients, including nitrate-nitrogen, in stormwater are discharged into receiving waters during the first-flush period, no existing Best Management Practices (BMPs) are specifically designed to capture and treat the first-flush portion of urban stormwater runoff. In addition, nitrate-nitrogen removal rates of most existing BMPs are relatively low. This thesis presents results from both laboratory experiments and numerical modeling of nitrate-nitrogen removal in a designed first-flush …
Evaluation Of Volumetric And Mechanistic Properties Of Asphalt Mixtures: Laboratory Vs. Field, Samuel Booth Cooper Iii
Evaluation Of Volumetric And Mechanistic Properties Of Asphalt Mixtures: Laboratory Vs. Field, Samuel Booth Cooper Iii
LSU Master's Theses
The maintenance and growth of the United States infrastructure is vital to the economic, social, and cultural success of the country. For this reason significant resources must be allocated to ensure adequate paving mixtures are designed, produced, and constructed. A critical issue that has received considerable attention in recent years is to identify and quantify causes, sources, and levels of variability in volumetric and mechanical properties of the mixture. This requires evaluation of three possible scenarios for production of asphalt mixture specimens: (1) laboratory mixed and laboratory compacted specimens (LL), (2) plant mixed and laboratory compacted specimens (PL), and (3) …
Implementing Lean In Healthcare Warehouse Operations - Evaluation Of 5s Best Practice, Sanjith Venkateswaran
Implementing Lean In Healthcare Warehouse Operations - Evaluation Of 5s Best Practice, Sanjith Venkateswaran
LSU Master's Theses
Lean strategies in healthcare aim at improving patient throughput, reducing medication errors, redesigning work flow, improving patient safety, and reducing cycle time. Documented studies to improve healthcare’s warehouse operation are not common in the literature. Managing types of medical supplies has always been a priority due to demand uncertainties and the risk of shortages that would profoundly affect patient safety. This study showcases two implementation approaches for the Lean tool 5S (Hybrid and Traditional) conducted in three different hospitals’ central warehouses at Ochsner Health System. These warehouses store similar medical products with over 1000 types of supplies (e.g. syringes, gloves, …
Two-Dimensional Numerical Modeling Of A Proposed Freshwater Diversion From The Bonnet Carre Spillway To The Labranche Wetlands, Josef Patrick Hoffmann
Two-Dimensional Numerical Modeling Of A Proposed Freshwater Diversion From The Bonnet Carre Spillway To The Labranche Wetlands, Josef Patrick Hoffmann
LSU Master's Theses
Engineered modifications to the lower Mississippi River within the past century have limited the magnitude and frequency of flood events in wetlands along the Louisiana coast. Without this natural delivery of freshwater, sediment, and nutrients, the ecological health of these wetlands are now degrading. A recent study within the Bonnet Carre Spillway has revealed that the 7,623 acres of floodway between the Mississippi River and Lake Pontchartrain is one of the few areas in Louisiana that is actively accreting land as a result of pulsed sediment-laden freshwater input during high discharge events in the Mississippi River. On the other hand, …
Modeling The Response Of A Beach Restoration Project In Louisiana To Two Consecutive Hurricanes, Naveen Khammampati
Modeling The Response Of A Beach Restoration Project In Louisiana To Two Consecutive Hurricanes, Naveen Khammampati
LSU Master's Theses
The current study is concentrated in modeling the cross-shore beach profile evolution and severe erosion of the dune (overwash) of a restored barrier island due to Hurricanes Gustav (2008) and Ike (2008) in coastal Louisiana. Pre-storm and post-storm survey data sets of Chaland Headland located in Plaquemines Parish, LA, were analyzed and categorized based on the overwash processes, and numerically modeled using SBEACH (Storm-induced BEAch CHange). The model results were compared with the measured topographic data. A total of 10 survey profiles were used in this study. SBEACH simulates cross-shore beach, berm and dune erosion produced by storm waves and …
Discrete Element Modeling Of Cone Penetration In Jsc-1a Lunar Regolith Simulant, Mehmet Burak Cil
Discrete Element Modeling Of Cone Penetration In Jsc-1a Lunar Regolith Simulant, Mehmet Burak Cil
LSU Master's Theses
NASA plans to return back to the Moon for a long term presence and use of the Moon as a launch station for further space exploration to other planets. This scenario increases the importance of determining the geotechnical properties of the lunar surface. However, due to the limited availability of lunar regolith and its high scientific value, a simulant material which closely matches the composition and grain size distribution and other characteristics of the lunar regolith has become an indispensable need to benefit in hardware development as well as estimating lunar regolith properties. Therefore, JSC-1A lunar regolith simulant, which was …
Fragility Analysis Of Building Envelope Components Subject To Windborne Debris Impact Hazard, Alexander Henry Herbin
Fragility Analysis Of Building Envelope Components Subject To Windborne Debris Impact Hazard, Alexander Henry Herbin
LSU Master's Theses
This thesis presents a methodology for developing windborne debris (WBD) impact fragility curves for building envelope components (BECs) by using stochastic finite element (FE) models. These fragility curves provide the probabilistic description of the impact resistance of BECs subject to an impact event described by an appropriate intensity measure (IM). Accurate fragility curves are essential in the development of a general probabilistic performance-based engineering framework for mitigation of WBD impact hazard. Monte Carlo simulation is used in combination with the FE method to propagate uncertainties in the BEC’s model parameters and WBD impact location. As an application example, the fragility …
Investigations Of Wave-Induced Turbulent Structures In Vegetated Flows, Agnimitro Chakrabarti
Investigations Of Wave-Induced Turbulent Structures In Vegetated Flows, Agnimitro Chakrabarti
LSU Master's Theses
The role of coastal vegetation in mitigating shoreline erosion by damping of incoming waves and the resultant effect on sediment transport is a critical area of coastal management research. However our understanding of the underlying hydrodynamic processes is limited. Laboratory flume experiments were conducted where a naturally grown emergent vegetation channel and a vegetation-less sand channel were exposed to regular waves. Wave height data was collected using wave gauges located at various points along the channel in the direction of oncoming waves. Acoustic Doppler Velocimeters (ADVs) placed at various depths in the water column measured wave orbital velocity signatures. This …
3d Quantification Of Particle Interaction Of Compacted Powders Using Synchrotron Micro Tomography (Smt), Md. Nafiul Haque
3d Quantification Of Particle Interaction Of Compacted Powders Using Synchrotron Micro Tomography (Smt), Md. Nafiul Haque
LSU Master's Theses
Synchrotron Micro Tomography (SMT) is a powerful, non-destructive scanning technique for studying the internal structure of materials. SMT was utilized for two applications in this thesis. The first application involves tracking particle rotation of aluminum powder under different compaction strains. The experiments were conducted on two geometrical configurations by applying axial load to compact the powder in the die and acquiring SMT scans at different strain levels. The SMT scans were processed using AVIZO visualization software for further analyses. The analyses included tracking the same particle at different compaction strain levels, analyzing their volume compressibility, and then quantifying their rotational …
Replenishment Policies For A Tree-Type Three Echelon Supply Chain System, Ratkrit Rochanaluk
Replenishment Policies For A Tree-Type Three Echelon Supply Chain System, Ratkrit Rochanaluk
LSU Master's Theses
One of the common goals which most companies have is to maximize profits. There are two way to increase profit: increasing revenue or reducing cost. Lacking of ability to keep the cost down could potentially drive the companies out of the business. In recent years, many researchers have been paying more attention on improving supply chain system due to high potential of creating cost savings. The supply chain network considered in this research is a tree-type, three-echelon single producer, multiple distributors, and multiple retailers system. The goal of this research is to develop a replenishment policy which satisfies customers’ demand …
Wave Forces On Bridge Decks And Damping Techniques To Reduce Damages, Aaron Michael Henry
Wave Forces On Bridge Decks And Damping Techniques To Reduce Damages, Aaron Michael Henry
LSU Master's Theses
The population of the Gulf Coast has grown immensely since 1960. Bridges along the coast are a vital part of this area’s infrastructure. They impact the transportation of goods and services, as well as the tourism in these areas. Many of these coastal bridges are at risk of being damaged or even destroyed during extreme weather events. This can cause not only short and long-term monetary problems, but the damage also can exacerbate the issues in getting people out of dangerous areas and getting help into areas in need, after an event. Damages during extreme weather events are the result …
Pavement Structural Evaluation Using The Rolling Wheel Deflectometer, Ahmed Moustafa Abdel-Khalek
Pavement Structural Evaluation Using The Rolling Wheel Deflectometer, Ahmed Moustafa Abdel-Khalek
LSU Master's Theses
The Rolling Wheel Deflectometer (RWD) offers the benefit to measure pavement deflection without causing any traffic interruption or compromising safety along the tested road segments. This study describes a detailed field evaluation of the RWD system in Louisiana in which 16 different test sites representing a wide array of pavement conditions were tested. Measurements were used to assess the repeatability of RWD measurements, to examine the effect of truck speeds, and to study the relationship between RWD and FWD deflection measurements and pavement conditions. Based on the results of the experimental program, it was determined that the repeatability of RWD …
Development And Implementation Of A Dual-Porosity Pore Network Structure Using X-Ray Computed Tomography For Pore Network Modeling Purposes, Samuel Taylor Best
Development And Implementation Of A Dual-Porosity Pore Network Structure Using X-Ray Computed Tomography For Pore Network Modeling Purposes, Samuel Taylor Best
LSU Master's Theses
3-D pore network modeling based on high-resolution X-ray computed tomography (XCT) is a useful tool for simulating pore-scale processes and phenomena within porous media in fields such as chemical and petroleum engineering and groundwater hydrology. XCT images provide the opportunity to capture the true topology of the porous system, retaining important characteristics such as pore geometry, location, and connectivity. However, a major limitation of XCT is its inability to resolve features smaller than the image resolution such as intraparticle porosity and void-space within secondary phases such as clay and micrite, here called microporosity. Identifying this microporosity is important for modeling …
Analysis Of Static Lateral Load Test Of Battered Pile Group At I-10 Twin Span Bridge, Binay Pathak
Analysis Of Static Lateral Load Test Of Battered Pile Group At I-10 Twin Span Bridge, Binay Pathak
LSU Master's Theses
In offshore structures, battered piles have been used as an alternative to vertical piles because of their capability in resisting higher lateral loads. The foundations of the newly built I-10 Twin Span Bridge over Lake Pontchartrain, LA, mostly consist of battered piles group. Understanding the behavior of these batter pile group foundations under lateral loading is very important to the design of highway bridge foundations. This study focuses on the evaluation of the lateral responses of battered pile group subjected to lateral loading and assessment of the current design methodology used for the design of I-10 Twin Span Bridge over …
Performance Assessment Of Innovative Framing Systems Through Building Information Modeling Based Energy Simulation, Santhosh Reddy Chinnayeluka
Performance Assessment Of Innovative Framing Systems Through Building Information Modeling Based Energy Simulation, Santhosh Reddy Chinnayeluka
LSU Master's Theses
While many residential contractors, architects, and home-buyers today are concerned about the environment and interested in sustainable construction technologies, the perceived higher initial costs of innovative materials and methodologies and a lack of life-cycle cost and performance data present significant barriers in the implementation of such techniques. Research regarding an integrated design process has suggested that performance based decision making is key to the successful implementation of sustainable building practices. Therefore, a need exists for the development of whole building design and evaluation models to allow decision making in all phases of a building project. This research seeks information regarding …
Effect Of Management Awareness Of Safety Climate Concept On Organizational Safety Climate, Christopher Michael Holzner
Effect Of Management Awareness Of Safety Climate Concept On Organizational Safety Climate, Christopher Michael Holzner
LSU Master's Theses
Safety research and practice have shifted focus away from accident rates and accident causal information to a more proactive approach that may predict organizational safety trends. This proactive approach involves the concept of an organizational safety culture and the use of surveys to measure organizational safety climate or „snapshot‟ of the organizational safety culture. Surveys were administered to line workers, supervisors, and managers at a modular home manufacturing company before and after safety climate information was presented to supervisors and managers in an attempt to measure the effect of the supervisors‟ and managers‟ increased awareness of the factors that define …
Hydrodynamic Modeling Of San Elijo Lagoon, California, Mary Elizabeth Nee Friedmann Bourgoyne
Hydrodynamic Modeling Of San Elijo Lagoon, California, Mary Elizabeth Nee Friedmann Bourgoyne
LSU Master's Theses
Decisions on where to concentrate management efforts need to be guided by an ability to accurately simulate and predict physical and ecological changes. Many restoration projects experience difficulties due to a lack of understanding of the ecological response and evolution of wetland systems (Goodwin et al., 2001). There are several approaches that can be taken in analyzing a system. The appropriate selection should be based on the available data, the spatial scale of the wetland, and the physical processes governing the system (Goodwin and Kamman, 2001). Predictive tools are essential for good long-term management (Goodwin et al., 2001). The objective …
Operational And Safety Assessment Of Joint And Conventional Lane Merge Configurations For Freeway Work Zones, Pradeep Rayaprolu
Operational And Safety Assessment Of Joint And Conventional Lane Merge Configurations For Freeway Work Zones, Pradeep Rayaprolu
LSU Master's Theses
Inefficient operation of traffic at work zone areas typically leads to increase in travel time delays, queue length, fuel consumption, number of forced merges, and roadway accidents. In order to improve the operational efficiency of work zones, research on freeway work zones constantly seeks to develop different lane merge control strategies, in addition to the conventional lane merge configuration, recommended by the Manual on Uniform Traffic Control Devices. This study evaluates the operational efficiency and safety benefits of a newly proposed configuration, joint lane merge (JLM), and compare its performance with the conventional lane merge (CLM) configuration. A simulation model …
Cost Effective Prevention Of Reflective Cracking In Composite Pavements, Rakesh Bandaru
Cost Effective Prevention Of Reflective Cracking In Composite Pavements, Rakesh Bandaru
LSU Master's Theses
Louisiana had experimented with various techniques and treatments to control reflection cracking since the 1970s; however, the cost-effectiveness and performance of these methods had not been reliably evaluated. In addition, scientific evaluation and testing of these treatment methods was not performed on many projects. To ensure successful control of this distress and effective allocation of maintenance funds, there is a critical need to assess the performance of pavement sections across the state built with various treatment methods and to determine the most cost-effective techniques to delay or to prevent reflection cracking in composite pavements. The objective of this study is …
The Effects Of Lean On Employees' Affective Attitude In A Modular Homebuilding Manufacturer, Digvesh Khot
The Effects Of Lean On Employees' Affective Attitude In A Modular Homebuilding Manufacturer, Digvesh Khot
LSU Master's Theses
Many organizational problems are related to job dissatisfaction, job-related stress, and lack of commitment in workers. Employees’ Affective Attitude (EAA) involves these three factors: job satisfaction, job stress, and commitment. This research is aimed at measuring the impact of Lean concepts on EAA factors. While providing an overview of Lean production and construction, this study focuses on one fundamental Lean concept, Kaizen. This thesis describes a case study showcasing the application of Lean concepts through Kaizen events and its impact on EAA for a modular homebuilder company. Based on previous literature a conceptual model was developed describing the potential links …
Hydrogen Production From Molasses Using Chlorinated Alkane-Contaminated Groundwater As An Inoculum, Hector Narez
Hydrogen Production From Molasses Using Chlorinated Alkane-Contaminated Groundwater As An Inoculum, Hector Narez
LSU Master's Theses
The Scenic Highway area of the PetroProcessors of Louisiana, Inc. (PPI) Superfund site located near Baton Rouge, LA, has groundwater contaminated with a variety of chlorinated alkanes (e.g., 1,2-dichloroethane, 1,2-dichloropropane) and alkenes (e.g., trichloroethene and vinyl chloride). In March 2009, a field-scale pilot test was conducted to evaluate the efficacy of injecting diluted agricultural feed grade molasses into the groundwater in an effort to stimulate in-situ reductive dechlorination of these chlorinated contaminants. Because H2 plays an important role as an electron donor in the metabolism of reductively dechlorinating bacteria, in support of the pilot-scale effort, experiments described in this thesis …
Nanomechanics Of Muscovite Subjected To Nanoindentation And The Pertinent Indentation Size Effect, Hang Yin
Nanomechanics Of Muscovite Subjected To Nanoindentation And The Pertinent Indentation Size Effect, Hang Yin
LSU Master's Theses
Two groups of nanoindentation experiments, including repeated loading tests and monotonic loading tests, were performed on muscovite with a sharp indenter tip and loading direction normal to the basal plane. By varying the maximum load in the first group of repeated experiments, influences of the load level can be examined on the modes of nanoscale deformation and the resulting estimation of hardness and elastic modulus. The incipient kink band concept was employed to interpret the observed dispersed loading-unloading hysteresis loops by considering formation and annihilation of IKBs. Furthermore, the material’s contact stiffness behavior was characterized by comparing the normalized unloading …
Biomechanical Evaluation Of Modified Track Shoes, Marlon Alberetos Greensword
Biomechanical Evaluation Of Modified Track Shoes, Marlon Alberetos Greensword
LSU Master's Theses
Track and field runners, especially sprinters and mid-distance runners, face many problems due to walking in spike shoes. Due to the fact that track and field spike shoes are designed specifically for running, the runner’s feet remain in an uncomfortable, flexed position when walking between workouts and races. Problems caused by the dangerous foot-positioning include, but are not limited to, the following: back pain, shin splints, bone spurs, blisters, and overall decreased level of running performance. Over time, runners wearing improper footwear for walking may face chronic injuries such as plantar fasciitis, shin splints, Achilles tendinitis, chondromalacia, and iliotibial band …
An Operational Policy For A Single Vendor Multi Buyer Integrated Inventory Supply Chain System Considering Shipping Time, Chiranjit Saha
An Operational Policy For A Single Vendor Multi Buyer Integrated Inventory Supply Chain System Considering Shipping Time, Chiranjit Saha
LSU Master's Theses
Since its introduction, the concept of integrated inventory supply chain has received a considerable amount of attention. The majority of studies in the last three decades revealed an increase in holding cost as product moves further down the chain or up the chain. A recent study Hoque (2008) considered vendor’s setup cost and inventory holding cost. Some research also considered fixed transportation cost, which is unrealistic. This study focuses on a single-vendor, multi-buyer scenario and presents three models. First, two models illustrate the transferring of equally-sized batches. Then, a third model considers the transferring of unequally-sized batches in a lot. …
Factors Affecting The Interface Shear Strength Of Pavement Layers, Nachiketa Bharat Patel
Factors Affecting The Interface Shear Strength Of Pavement Layers, Nachiketa Bharat Patel
LSU Master's Theses
Flexible pavement structures are built in layers with a certain degree of bonding at the interface, which is affected by several factors which could be either material related, or construction related. The tack coat material type, residual application rate, tack coat coverage, and pavement surface type are attributed as material related factors. On the other hand, cleanliness, moisture, and vertical confinement pressure could be classified as construction related factors. The objective of this study was to quantify the effects of these factors on the pavement interface bonding in terms of interface shear strength. Five types of tack coats, four of …
A Study Of Hough Transform For Weld Extraction, Rakesh Gunaseelan
A Study Of Hough Transform For Weld Extraction, Rakesh Gunaseelan
LSU Master's Theses
The process of joining metals is called welding. At times, selecting a poor quality material or improper usage of welding technologies may cause defects in welded joints. Some of these welded joints have to be tested nondestructively, because their failure can cause lot of damage, for instance in power plants. Radiography is a very common method for non-destructive testing of welds. It is done by certified weld inspectors who have knowledge about weld flaws, looking at the radiograph of the welded joint with naked eye. The judgment of the weld inspector can be biased; subjective, because it is dependent on …
Empirically Evaluating And Developing Alarm Rate Standards For Liquid Pipeline Control Room Operators, Glen David Uhack Ii
Empirically Evaluating And Developing Alarm Rate Standards For Liquid Pipeline Control Room Operators, Glen David Uhack Ii
LSU Master's Theses
The liquid and gas pipeline community has recently been faced with the challenge of new governmental regulations set forth by congress which are being implemented by PHMSA (an arm of the DOT). These new governmental regulations need to understand the role of the human in the loop as part of alarm management systems. To investigate alarm rate standards a repeated measures design was developed that included a series of ten (10) simulated liquid pipeline operator scenarios utilizing high fidelity liquid pipeline simulation software (Stoner Pipeline Simulator). A total of 39 participants volunteered for this study. Participants completed two subsets of …