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Articles 31 - 54 of 54
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Grinding Wheel Condition Monitoring With Boosted Classifiers, Fengming Tang
Grinding Wheel Condition Monitoring With Boosted Classifiers, Fengming Tang
LSU Master's Theses
In this thesis, two data sets collected in grinding process under different cutting and wheel conditions were studied. One is the cutting forces in three directions, i.e. X, Y and Z, collected under two different cutting conditions. The other one is the acoustic emission (AE) signals collected under different wheel conditions(sharp and dull). For the goal of grinding wheel condition monitoring, the regression model with autocorrelated errors was proved to be effective and was used to extract features from signals in this study. The coefficients of the models served as the features used in the classification step that employed boosting …
Effect Of Repetitions On Static And Dynamic Strength, Sai Chaitanya Reddy Bogolu
Effect Of Repetitions On Static And Dynamic Strength, Sai Chaitanya Reddy Bogolu
LSU Master's Theses
The objective of this study was to investigate the effect of repetitions on static and dynamic strength. The study is divided into two parts, the first part investigated static and dynamic strength during one, three and six repetitions per minute, and the second part of the study analyzed dynamic strength data collected using the Multiaxial Multipurpose Isokinetic Dynamometer. The study comprised of dynamic strength test data at three speeds of one, five and ten inch per second. Five male subjects participated in the first part of the study, and the results were analyzed by plotting a time series to observe …
Cognitive Memory Effects On Non-Linear Video-Based Learning, Katherine Renee Comeaux
Cognitive Memory Effects On Non-Linear Video-Based Learning, Katherine Renee Comeaux
LSU Master's Theses
During an informative learning process, information, material, facts and ideas are typically conveyed in a linear arrangement. Individuals are frequently distracted during this process with their attention being diverted to an interruption (Internet, phone call, etc). When presented with any new information, the mind evolves through problem solving and evaluation procedures. The way in which that information is processed and perceived depends on: (a) original presentation (b) examination of material and (c) an individualistic measurement of success. However, when faced with an interruption, the person is forced to deal with non-linear arrangement of information. This research investigates nonlinear presentation or …
An Application Of Parallel Computation To Collaborative Optimization, Shahab Nayyer
An Application Of Parallel Computation To Collaborative Optimization, Shahab Nayyer
LSU Master's Theses
Multidisciplinary Design Optimization (MDO) has evolved as a discipline which provides a body of methods and techniques to assist engineers in solving large scale design problems. There are many frameworks for formulating MDO problems. These frameworks can be broadly classified as single-level or bi-level formulations. Collaborative Optimization (CO) is one of the popular bi-level formulations to solve an MDO problem. There are numerous design optimization problems which are highly CPU time intensive and require a long simulation time. With the advent of cheaper and faster available PC’s, distributed parallel computer clusters have become very popular. These clusters provide large computing …
Usability Of Home Cholesterol Test Kits And Their Impact On Patients' Decision, Deepti Surabattula
Usability Of Home Cholesterol Test Kits And Their Impact On Patients' Decision, Deepti Surabattula
LSU Master's Theses
Release of home health testing kits into the market has enabled people to take care of their own health. Misinterpretation of results and delays in treatments are the major concerns of the doctors. In the present study, two cholesterol test kits, AccuchekÒ Instant plusÒ and Home Access® Instant Cholesterol Test, were compared on the basis of user performance, accuracy, and the patient’s future medical decisions based on the test results. The study was conducted with 30 participants, 15 men and 15 women. Participants tested their overall cholesterol level with both kits. In addition, a clinical cholesterol evaluation, the medical gold …
Musculoskeletal Disorders In Dentistry, Frank Maurice Pitts
Musculoskeletal Disorders In Dentistry, Frank Maurice Pitts
LSU Master's Theses
Because of the common occurrence of pain experienced by dental professionals during the course of a workday and throughout their career, an epidemiological and a field study were performed in an effort to contribute to the prevention of musculoskeletal disorders in dentistry. The aim of the thesis is two fold: to assess the perception of occupational pain and discomfort felt by dentists through a perception based survey and to assess the muscle behavior of dentists during isotonic postures while performing various dental procedures on their first and last patients in a given work day. One hundred (100) dentists participated in …
A Study Of Distributed Clustering Of Vector Time Series On The Grid By Task Farming, Arun B. Nayar
A Study Of Distributed Clustering Of Vector Time Series On The Grid By Task Farming, Arun B. Nayar
LSU Master's Theses
Traditional data mining methods were limited by availability of computing resources like network bandwidth, storage space and processing power. These algorithms were developed to work around this problem by looking at a small cross-section of the whole data available. However since a major chunk of the data is kept out, the predictions were generally inaccurate and missed out on significant features that was part of the data. Today with resources growing at almost the same pace as data, it is possible to rethink mining algorithms to work on distributed resources and essentially distributed data. Distributed data mining thus holds great …
Effect Of Back Belt On Inter-Joint Coordination And Postural Index Value Under Self Selected Manual Lifting Technique, Ashish Dashrathrao Nimbarte
Effect Of Back Belt On Inter-Joint Coordination And Postural Index Value Under Self Selected Manual Lifting Technique, Ashish Dashrathrao Nimbarte
LSU Master's Theses
Over the past decade increasing number of US companies have been encouraging the use of abdominal support as a part of their efforts to reduce the human and economic costs due to back injuries. Back belts are assumed to prevent injuries by restricting posture, increasing intra abdominal pressure, providing psychological effect and relaxing trunk muscle to provide circumferential support around the pelvis ring. This research deals in detail with the posture restriction caused by back belt. Two-dimensional kinematic data was collected from ten subjects using nine marker positions. Angular displacement of nine body angles was compared. The kinematic relationship, posture, …
Semantic Classification Of Rural And Urban Images Using Learning Vector Quantization, Prakash Thulasiraman
Semantic Classification Of Rural And Urban Images Using Learning Vector Quantization, Prakash Thulasiraman
LSU Master's Theses
One of the major hurdles in semantic image classification is that only low-level features can be reliably extracted from images as opposed to higher level features (objects present in the scene and their inter-relationships). The main challenge lies in grouping images into semantically meaningful categories based on the available low-level visual features of the images. It is important that we have a classification method that will handle a complex image dataset with not so well defined boundaries between clusters. Learning Vector Quantization (LVQ) neural networks offer a great deal of robustness in clustering complex datasets. This study presents a semantic …
Hierarchical Indexing For Region Based Image Retrieval, Eka Aulia
Hierarchical Indexing For Region Based Image Retrieval, Eka Aulia
LSU Master's Theses
Region-based image retrieval system has been an active research area. In this study we developed an improved region-based image retrieval system. The system applies image segmentation to divide an image into discrete regions, which if the segmentation is ideal, correspond to objects. The focus of this research is to improve the capture of regions so as to enhance indexing and retrieval performance and also to provide a better similarity distance computation. During image segmentation, we developed a modified k-means clustering algorithm for image retrieval where hierarchical clustering algorithm is used to generate the initial number of clusters and the cluster …
Effects Of Mental Rotation, Visual Aids And Training On Inspection Performance During Airport Baggage Inspection, Sunil Addepalli
Effects Of Mental Rotation, Visual Aids And Training On Inspection Performance During Airport Baggage Inspection, Sunil Addepalli
LSU Master's Theses
Since 9/11, airport security has become an area of critical national security. The current study investigates the effect of mental rotation training and the presence of visual decision aids on inspection performance. Forty-eight participants were divided into two groups (Group A and Group B) of twenty-four each. Each group was provided with training on visual inspection, baggage screening and on using the software simulation of airport baggage inspection. Participants had to identify from images any object that cannot be allowed on a passenger plane and register a response by clicking one of the buttons, “Threat” or “No Threat”. Participants in …
Probabilistic Risk Assessment Method For Prioritization Of Risk Factors, Jay Tarakkumar Shah
Probabilistic Risk Assessment Method For Prioritization Of Risk Factors, Jay Tarakkumar Shah
LSU Master's Theses
Risk management involves assessing the risk sources and designing strategies and procedures to mitigate those risks to an acceptable level. Measurement of risk factors plays an important role in the assessment of risk. This research proposes to develop risk assessment frameworks and mathematical model (Probabilistic Risk Assessment model) identify the risk factors. Quantification and prioritization of risk factors will help to design controls, resource allocation policies and minimize the total cost using the Cost Minimization model. The proposed models are applied to a complex system that is representative of actual business situations.
Optimal Test Case Selection For Multi-Component Software System, Praveen Babu Kysetti
Optimal Test Case Selection For Multi-Component Software System, Praveen Babu Kysetti
LSU Master's Theses
The omnipresence of software has forced upon the industry to produce efficient software in a short time. These requirements can be met by code reusability and software testing. Code reusability is achieved by developing software as components/modules rather than a single block. Software coding teams are becoming large to satiate the need of massive requirements. Large teams could work easily if software is developed in a modular fashion. It would be pointless to have software that would crash often. Testing makes the software more reliable. Modularity and reliability is the need of the day. Testing is usually carried out using …
Performance Assessment Of Coated Cemented Carbide Tools In Turning Aisi 1018 Steel, Mohamad Nouilati
Performance Assessment Of Coated Cemented Carbide Tools In Turning Aisi 1018 Steel, Mohamad Nouilati
LSU Master's Theses
In this study, the machining performance of a series of commercially available coated tungsten based cemented carbides, with 55o diamond shape, were investigated during finish turning of AISI 1018 steel under dry conditions. The inserts tested had a coating of TiN, Al2O3, TiN/Al2O3 and TiC/Al2O3/TiN respectively. For comparison, uncoated cemented tungsten carbide was also tested under the same cutting conditions. The coated tools exhibited superior wear resistance over the uncoated tool. The TiC/Al2O3/TiN coated tool had the lowest flank wear due to the high abrasive resistance of the TiC layer. The Al2O3 coated tool showed superior wear-resistance over the TiN/Al2O3 …
Effects Of Pressure Suit And Race On Functional Reach, Static And Dynamic Strength, Nageswara Rao Uppu
Effects Of Pressure Suit And Race On Functional Reach, Static And Dynamic Strength, Nageswara Rao Uppu
LSU Master's Theses
In the design of any manual workspace, it is important for the designers to have access to data that can illustrate reach capabilities under real-time work situation. Wearing bulky clothing (pressure suit) and protective restraints (seat or shoulder harness belts) is often mandatory in high acceleration work environments. Clothing and personal equipment worn can influence the functional reach and strength values since they add to the body size. The present study was conducted to investigate the effect of wearing a VKK-6M pressure suit on functional reach limitations and strength values. The technology of incorporating body dimensions into cockpit design primarily …
Improved Opportunity Cost Algorithm For Carrier Selection In Combinatorial Auctions, Viswanath Uma Gnanasekaran
Improved Opportunity Cost Algorithm For Carrier Selection In Combinatorial Auctions, Viswanath Uma Gnanasekaran
LSU Master's Theses
Transportation costs constitute up to thirty percent of the total costs involved in a supply chain. Outsourcing the transportation service requirements to third party logistics providers have been widely adopted, as they are economically more rational than owning and operating a service. Transportation service procurement has been traditionally done through an auctioning process where the auctioneer (shipper) auctions lanes (distinct delivery routes) to bidders (carriers). Individual lanes were being auctioned separately disallowing the carriers to express complements and substitutes. Using combinatorial auctions mechanism to auction all available lanes together would allow the carriers to take advantage of the lane bundles, …
Bezier Curves For Metamodeling Of Simulation Output, Harish J. Kingre
Bezier Curves For Metamodeling Of Simulation Output, Harish J. Kingre
LSU Master's Theses
Many design optimization problems rely on simulation models to obtain feasible solutions. Even with substantial improvement in the computational capability of computers, the enormous cost of computation needed for simulation makes it impractical to rely on simulation models. The use of metamodels or surrogate approximations in place of actual simulation models makes analysis realistic by reducing computational burden. There are many popular metamodeling techniques such as Polynomial Regression, Multivariate Adaptive Regression Splines, Radial Basis Functions, Kriging and Artificial Neural Networks. This research proposes a new metamodeling technique that uses Bezier curves and patches. The Bezier curve method is based on …
Joint Optimization Of Process Improvement Investments For Supplier-Buyer Cooperative Commerce, Erick Comeaux
Joint Optimization Of Process Improvement Investments For Supplier-Buyer Cooperative Commerce, Erick Comeaux
LSU Master's Theses
This research focuses on supporting the formation of strategic alliances through the concept of cooperative commerce, where suppliers and buyers work together to jointly optimize their businesses. The general goal of this research is to examine existing cooperative commerce models for obstacles that would hinder their successful implementation into modern industrial applications and to address those shortcomings. Total annual cost equations are formulated to capture the joint total relevant cost of cooperative commerce business relationships. These total joint relevant cost models will include terms that capture the ordering cost, holding cost, and cost of quality, as well as any applicable …
Effects Of Automobile Seating Posture On Trunk Muscle Activity, Milton Maada-Gormoh Saidu
Effects Of Automobile Seating Posture On Trunk Muscle Activity, Milton Maada-Gormoh Saidu
LSU Master's Theses
Reports for adult population indicate that almost 80% of the adult population has reported some form of lower back aches. Each year American workers suffer more than 300,000 lost-time injuries involving musculoskeletal disorders of the back, with the costs that run into billions of dollars. Sedentary tasks are known to be major contributing factors of back pain. Prior studies have indicated that the myoelectric activity of the lumbar region decreases when the back rest inclination of a seat increased. An increase in seat pan inclination so that it increases pressure on the leg muscles is also a cause for back …
Route Planning Of Automated Guided Vehicles For Container Logistics, Sanjay Shankarrao Gurav
Route Planning Of Automated Guided Vehicles For Container Logistics, Sanjay Shankarrao Gurav
LSU Master's Theses
Automated guided vehicles (AGVs) are widely used in container terminals for the movement of material from shipping to the yard area and vice versa. Research in this area is directed toward the development of a path layout design and routing algorithms for container movement. The problem is to design a path layout and a routing algorithm that will route the AGVs along the bi-directional path so that the distance traveled will be minimized. This thesis presents a bi-directional path flow layout and a routing algorithm that guarantee conflict-free, shortest time routes for AGVs. Based on the path layout, a routing …
Optimal Batch Quantity Models For A Lean Production System With Rework And Scrap, Pablo Biswas
Optimal Batch Quantity Models For A Lean Production System With Rework And Scrap, Pablo Biswas
LSU Master's Theses
In an imperfect manufacturing process, the defective items are produced with finished goods. Rework process is necessary to convert those defectives into finished goods. As the system is not perfect, some scrap is produced during this process of rework. In this research, inventory models for a single-stage production process are developed where defective items are produced and reworked, where scrap is produced, detected and discarded during the rework. Two policies of rework processes are considered (a) First policy: rework is done within the cycle, and (b) Second policy: rework is done after N cycles of normal production. Also, three types …
Supply Chain Models For An Assembly System With Preprocessing Of Raw Materials, Mohammad Anwar Ashek Rahman
Supply Chain Models For An Assembly System With Preprocessing Of Raw Materials, Mohammad Anwar Ashek Rahman
LSU Master's Theses
An assembly line that procures raw materials from outside suppliers and processes the materials into finished products is considered in this research. An ordering policy is proposed for raw materials to meet the requirement of a production facility, which, in turn, must deliver finish products in a fixed quantity at a fixed time interval to the outside buyers. Two different types of raw materials, ‘unfinished’ and ‘ready-to-use’, are procured for the manufacturing system. The ‘unfinished raw materials’ are turned into ‘processed raw materials’ after preprocessing. In the assembly line, the ‘processed raw materials’ and the ‘ready raw materials’ are assembled …
Visco-Elastic Creep In The Lumbar Spine Associated With Static Flexion: A Feline Model, Guntulu Selen Hatipkarasulu
Visco-Elastic Creep In The Lumbar Spine Associated With Static Flexion: A Feline Model, Guntulu Selen Hatipkarasulu
LSU Master's Theses
Musculoskeletal disorders (MSDs) have become a major health concern with the industrial revolution and technological advances. The National Institute for Occupational Safety and Health (NIOSH) recently estimated the cost of MSDs at $13 to $20 billion annually. Back, spine, and spinal cord disorders add up to 60% of the total MSD injuries. Based on pervious studies, it is known that lumbar ligaments play a limited or little role in stabilizing the spine; where as the musculature around the spine is the major stabilizing structure. However, repetitive or prolonged static displacement or load induces creep in passive tissues of the spine …
The Effect Of Initial Selections In Estimating The Missing Comparisons In An Incomplete Ahp Matrix, Sugeng Setiawan
The Effect Of Initial Selections In Estimating The Missing Comparisons In An Incomplete Ahp Matrix, Sugeng Setiawan
LSU Master's Theses
One of the most widely used methods in decision-making is the Analytic Hierarchy Process (AHP). With its technique of comparing the alternatives by means of a sequence of pairwise comparison matrices, the AHP is both easy to understand and very versatile. This research aims at contributing some insights on this method, in particular, regarding to what is known as the incomplete AHP. The core of this research is to investigate whether the initial comparisons used to extract the data for a multi-criteria decision making problem, will play a role in producing a relatively accurate estimation of the ranking of the …