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Reconfiguration Of Shipboard Power Systems Using A Genetic Algorithm, Koteshwar Reddy Padamati

Theses and Dissertations

The shipboard power system supplies energy to sophisticated systems for weapons, communications, navigation, and operation. After a fault is encountered, reconfiguration of a shipboard power system becomes a critical activity that is required to either restore service to a lost load or to meet some operational requirements of the ship. Reconfiguration refers to changing the topology of the power system in order to isolate system damage and/or optimize certain characteristics of the system related to power efficiency. When finding the optimal state, it is important to have a method that finds the desired state within a short amount of time, …

Intelligent Placement Of Meters/Sensors For Shipboard Power System Analysis, Sandhya Sankar

Theses and Dissertations

Real time monitoring of the shipboard power system is a complex task to address. Unlike the terrestrial power system, the shipboard power system is a comparatively smaller system but with more complexity in terms of its system operation. This requires the power system to be continuously monitored to detect any type of fluctuations or disturbances. Planning metering systems in the power system of a ship is a challenging task not only due to the dimensionality of the problem, but also due to the need for reducing redundancy while improving network observability and efficient data collection for a reliable state estimation …

Modeling Of An Adaptive Parallel System With Malleable Applications In A Distributed Computing Environment, Sheikh Khaled Ghafoor

Theses and Dissertations

Adaptive parallel applications that can change resources during execution, promise increased application performance and better system utilization. Furthermore, they open the opportunity for developing a new class of parallel applications driven by unpredictable data and events. The research issues in an adaptive parallel system are complex and interrelated. The nature and complexities of the relationships among these issues are not well researched and understood. Before developing adaptive applications or an infrastructure support for adaptive applications, these issues need to be investigated and studied in detail. One way of understanding and investigating these issues is by modeling and simulation. A model …

158th Commencement, Winter

Commencement Programs

No abstract provided.

Comparing The Performance Of Heterogeneous And Homogeneous Swarms, Jason Alexander Hales

Theses and Dissertations

This thesis compares the performance of heterogeneous and homogenous swarms. Swarms are defined as particles or agents which react to their environment and fellow particles or agents according to social rules. The weights of three attributes of an individual agent were varied for these experiments: Collision Avoidance with individual agents in the swarm, Center of Mass of the swarm and the parameter that controls Velocity Matching in the swarm. In homogenous swarms, all individuals had the same attribute weights while in heterogeneous swarms weights for one attribute were taken from a normal distribution for the population. These swarms were then …

Coordination Of Inventory And Transportation Decisions In A Two-Stage Supply Chain, Ismail Capar

Theses and Dissertations

In today's competitive business world, companies face the crucial task of delivering goods on time. In order to benefit from high volumes, distributors (suppliers) try to consolidate deliveries while maintaining a high percentage of on time delivery. Increasing delivery frequencies typically increases suppliers' performance, but it also increases the transportation costs. Finding a suitable middle ground is a challenge confronting many companies throughout various supply chains. This dissertation is a study about the coordination of inventory and transportation decisions in a two-stage supply chain.

A Simplified Model Of Heat And Mass Transfer Between Air And Falling-Film Desiccant In A Parallel-Plate Dehumidifier, Anna Kathrine Hueffed

Theses and Dissertations

A simplified model is developed to predict the heat and mass transfer between air and fallingilm liquid desiccant during dehumidification in a parallel-plate absorber. Compared to the second-order partial differential equations that describe fluid motion, first-order, non-coupled, ordinary differential equations are used to estimate the heat and mass transferred and explicit equations are derived from conservation principles to determine the exiting conditions of the absorber for different flow arrangements. The model uses a control volume approach that accounts for the change in desiccant film thickness and property values. The model agreed with a more complicated parallel flow model in literature. …

Full Scale Instrumented Testing And Analysis Of Matting Systems For Airfield Parking Ramps And Taxiways, Chad A. Gartrell

Theses and Dissertations

The U.S. military requires the ability to rapidly deploy troops, equipment, and materials anywhere in the world. Recent operations have brought attention to the need to utilize austere, unsurfaced, and sometimes sub-standard airfields within a theater of interest. These airfields may require additional taxiways and aprons. One option for the rapid construction of such is airfield matting systems. The focus of the work for this thesis was commercially available airfield matting systems to support large military transport aircraft, such as the C 17. Several test sections with differing strength soils were built with chosen mats tested in an elimination method, …

2007 Fall Commencement, Harding University

Commencement Programs

Program for the Commencement on December 15.

Commencement Speaker: Howard Wright

A Periodic Technique For Measuring Thermal Properties Of Thin Samples, Garrett May

LSU New Orleans Theses and Dissertations

We present a periodic technique for measuring the thermal conductivity and diffusivity of thin samples simultaneously. In samples of this type, temperature measurements must be made across the sample faces and are therefore subject to large error due to the interface resistance between the temperature sensor and the sample. The technique uses measurements of the amplitude and phase of the periodic temperature across both a reference sample and the unknown material at several different frequencies. Modeling of the heat flow in the sample allows the simultaneous determination of the thermal parameters of the sample as well as the interface resistance. …

On The Determination Of Building Footprints From Lidar Data, Henry C. George

LSU New Orleans Theses and Dissertations

A new approach to improve the determination of building boundaries through automatic processing of light detection and ranging (LIDAR) data is presented. The LIDAR data is processed and interpolated into a grayscale image of intensity values corresponding to height measurements. Ground measurements are separated from non-ground measurements by using a progressive morphological filter. With these measurements now distinct, further separation of non-ground measurements into building and non-building measurements is performed by growing regions with similar characteristics. These building areas are then refined, resulting in a ground plan representation of building boundaries, known as building footprints. Several algorithms are then implemented …

Louisiana Intech Professional Development: Middle School Administrators' Perceptions Of Change As Related To Student Achievement, Diane R. Mason

LSU New Orleans Theses and Dissertations

School accountability requires administrators and policymakers to implement sound programs that sustain school improvement. Hundreds of Louisiana teachers participate in Louisiana Integration of Technology (INTECH) professional development as a strategy to change instructional practice and improve student achievement. The purpose of this quantitative research study was to investigate the Louisiana INTECH professional development model as an impetus for school change and increased student achievement. The study employed a survey and an ex-post facto, causal-comparative design to address the questions: 1) Do middle school administrators perceive the Louisiana INTECH professional development model as an impetus for school change? 2) Does the …

An Investigation Of Factors Identified By Novice Teachers That Influence Performance On Standardized Assessments And Teacher Performance, Donna Odom Lacaze

LSU New Orleans Theses and Dissertations

Entry in the teaching profession is often dependent on a number of steps or phases involving standardized assessments and performance assessments. The relationships between and among the variables incorporated in such instruments are typically assumed, but not necessarily substantiated. Furthermore, the relationships between the variables assessed and factors involved in teacher preparation have not been investigated. This study was designed to investigate the nature of such relationships in one particular case. In the spring of 1997, the Louisiana legislature changed the Louisiana Teacher Assessment Program to create the Louisiana Teacher Assistance and Assessment Program (LaTAAP). LaTAAP is a uniform statewide …

The Impact Of Louisiana Intech Professional Development On Elementary School Leaders' Perceptions Of Change And Student Achievement, Sheryl Abshire

LSU New Orleans Theses and Dissertations

Each year, hundreds of Louisiana's teachers participate in state-sponsored Integration of Technology (INTECH) training. Although INTECH training and certification is acknowledged by the Louisiana Department of Education as the standard for technology-trained teachers, no research has been conducted to determine its impact on student achievement (Picard, 2000). The study's purposes were to examine perceptions of school leaders about Louisiana INTECH professional development as a change agent in schools and to determine the impact of this training on third grade mathematics and reading achievement. This study addressed the questions: Do elementary school leaders perceive INTECH professional development as a catalyst for …

Exploring The Assessment Aspect Of Differentiated Instruction: College Efl Learners' Perspectives On Tiered Performance Tasks, Yeh-Uh Hsueh Chen

LSU New Orleans Theses and Dissertations

If human beings are believed to be individually unique, why are students evaluated with standardized tests? Differentiated instruction, honoring individual differences of each learner, provides an alternative answer to the question by employing tiered performance tasks to address personal needs in assessment situations. To explore the applicability of differentiated instruction in an English as a Foreign Language (EFL) environment, this case study explored Taiwanese college students’ perspectives on tiered performance tasks and educational implications of the perspectives with regard to EFL learning and teaching at the tertiary level. Grounded in the humanistic stance of education and sociocultural view of learning, …

When Decision Meets Estimation: Theory And Applications, Ming Yang

LSU New Orleans Theses and Dissertations

In many practical problems, both decision and estimation are involved. This dissertation intends to study the relationship between decision and estimation in these problems, so that more accurate inference methods can be developed. Hybrid estimation is an important formulation that deals with state estimation and model structure identification simultaneously. Multiple-model (MM) methods are the most widelyused tool for hybrid estimation. A novel approach to predict the Internet end-to-end delay using MM methods is proposed. Based on preliminary analysis of the collected end-to-end delay data, we propose an off-line model set design procedure using vector quantization (VQ) and short-term time series …

Microstructure-Property Relations Throughout The Powder Metallurgy Process, Laura Arias Tucker

Theses and Dissertations

To produce crack free powder compacts with desirable mechanical properties and uniform densities, a predictive finite element simulation of the powder metallurgy process is necessary (compaction and sintering). The finite element method, through the use of appropriate constitutive material models captures the microstructure-property history after compaction and sintering. A FC-0205 cylinder and FC-0208 automotive main bearing cap were compacted to investigate the microstructure changes at different locations within the parts. Measurements of the pore volume fraction, pore size, pore nearest neighbor, pore aspect ratio, and grain size were performed after compaction for the cylinder after compaction and after compaction and …

Non-Equilibrium Surface Growth For Competitive Growth Models And Applications To Conservative Parallel Discrete Event Simulations, Poonam Santosh Verma

Theses and Dissertations

Non-equilibrium surface growth for competitive growth models in (1+1) dimensions, particularly mixing random deposition (RD) with correlated growth process which occur with probability $p$ are studied. The composite mixtures are found to be in the universality class of the correlated growth process, and a nonuniversal exponent $\delta$ is identified in the scaling in $p$. The only effects of the RD admixture are dilations of the time and height scales which result in a slowdown of the dynamics of building up the correlations. The bulk morphology is taken into account and is reflected in the surface roughening, as well as the …

Watermarking With Wavelet Transforms, Kristen Michelle Parker

Theses and Dissertations

Digital watermarking algorithms based on wavelet transforms provide increased performance and perceptual quality. This thesis proposes two wavelet-based schemes: one robust and one fragile. Robust watermarks should withstand attacks, such as compression, while maintaining the data integrity. The first approach presented is an algorithm which implements image watermarking in the domain of an overcomplete, or redundant, wavelet transform. Alternately, fragile watermarks are intended for use in applications wherein any loss of image quality is not acceptable. In the second approach presented, data embedding in the domain of an integer wavelet transform is considered. An algorithm is proposed that uses a …

Energy Storage System Requirements For Shipboard Power Systems Supplying Pulsed Power Loads, Prashanth Duvoor

Theses and Dissertations

Energy storage systems will likely be needed for future shipboard power systems that supply loads with high power variability such as pulsed power loads. The power generation in shipboard power systems may not be sufficient to satisfy the energy demands of the pulsed power load systems operating in conjunction with other ship service loads. Two fundamental items in evaluating the requirements of an energy storage system are the energy storage capacity and the ratings of the power conversion equipment that interfaces the energy device to the power system. The supply current of pulsed power load systems is aperiodic and cannot …

Evaluation Of A Low Profile Cascade Aerator, Chukwukelue Kenneth Monwuba

Theses and Dissertations

The aeration potential of a low profile cascade aerator was studied under varying operational conditions in accordance with the ASCE Standard for Measurement of Oxygen Transfer in Clean Water [ASCE 2-06, 2007]. Operational parameters delved into included the channel slope (2.50, 4.50 and 6.50); water flow rate (465.75 L/min.m (37.5 gpm/ft), 931.45 L/min.m (75 gpm/ft) and 1397.20 L/min.m (112.5 gpm/ft)); and weir geometry (rectangular-shaped, inverted T-shaped, W-shaped and inverted Cross shaped weir). The oxygen transfer coefficient, KLa, was derived by use of a FORTRAN-based nonlinear regression analysis computer program and served to assess the effectiveness of various combinations of operational …

The Vehicle Routing Problem With Simultaneous Pick-Up And Deliveries And A Grasp-Ga Based Solution Heuristic, Arif Volkan Vural

Theses and Dissertations

In this dissertation, the vehicle routing problem and one of its variants, the vehicle routing problem with simultaneous pick up and deliveries (VRPSPD) are studied. The traditional vehicle routing problem (VRP) consists of constructing minimum cost routes for the vehicles to follow so that the set of customers are visited only once. A lot of effort has been devoted to research on developing fast and effective solution methods for many different versions of this problem by different majors of engineering profession. Thus, a structuring effort is needed to organize and document the vast literature so far has accumulated in this …

Self-Management Of Type 2 Diabetes In Appalachina Women., Melissa Joy Magness

Electronic Theses and Dissertations

Gender, minority, and regional-related disparities have been documented in diabetes management. Self-efficacy, the belief in one's ability to carry out the actions mandated by a task, has been identified as a key predictor in glycemic control; however, it has not been investigated in rural, female populations. This cross-sectional, correlation investigation examined the relationships among self-efficacy, depression, and diabetes self-care management in women living in Appalachia with type 2 diabetes. Using Bandura's Social Cognitive Theory, 85 women ages ≥ 21 with type 2 diabetes for a minimum of 6 months who were residents in Appalachia completed the 1) Diabetes Self-Efficacy Scale, …

Decomposition, Packings And Coverings Of Complete Digraphs With A Transitive-Triple And A Pendant Arc., Janice Gail Lewenczuk

Electronic Theses and Dissertations

In the study of design theory, there are eight orientations of the complete graph on three vertices with a pendant edge, K₃∪{e}. Two of these are the 3-circuit with a pendant arc and the other six are transitive triples with a pendant arc. Necessary and sufficient conditions are given for decompositions, packings and coverings of the complete digraph with each of the six transitive triples with a pendant arc.

Mentoring At-Risk Youth: A Case Study Of An Intervention For Academic Achievement With Middle School Aged Students., Kellie Carter Johnson

Electronic Theses and Dissertations

Students without caring, positive role models often make poor decisions. School personnel are aware of the need to help these students be productive members of society; therefore, they examine strategies and reforms to reach them. A mentoring program is one such intervention that is gaining in popularity.

This research study examined a mentoring program entitled the LISTEN (Linking Individual Students To Educational Needs) Mentoring Program that I developed in 2003. For the purposes of this research, the mentoring program was developed and implemented in one middle school in Northeast Tennessee. The goal of the LISTEN mentoring program was to identify …

Effect Of Distance Learning Technology As A Training Delivery System For Rural And Small Law Enforcement Agencies, Thomas C. Johnson

Theses and Dissertations

This study examined the perceptions of law enforcements officers employed by rural and small law enforcement agencies on the effectiveness of the use of distance education technology as a delivery system for training programs. Four research questions were designed to assess officers’ perceptions. This study used both quantitative and qualitative analysis of data to assess these questions. Quantitative data were collected through the use of a pretest and post-test, and a survey. Qualitative data were collected through observations of subjects’ interaction with the treatment, interviews with participants, reviews of survey comments, and analyses of budget documents. The results of this …

A Study To Identify The Effects Of Community College Student Recruitment Marketing By Television On Prospective Students, Raymond Benjamin Denton

Theses and Dissertations

The purpose of this study was to compare and to evaluate the television market segmentation suggested in Massey's 1997 study, to investigate the viewing habits of those potential community college students, and to look for the message that called them to action. Segmentation specifically refers to the difference in preferred call to action messages between directed students, lateopters and drifters. The demographics that make-up the college in this study (Meridian Community College) was of particular interest in determining the suggested segmentation. Research questions put forward in this study were: 1. What are the descriptive profiles of the respondents? 2. Is …

New Technique For Imputing Missing Item Responses For An Ordinal Variable: Using Tennessee Youth Risk Behavior Survey As An Example., Andaleeb Abrar Ahmed

Electronic Theses and Dissertations

Surveys ordinarily ask questions in an ordinal scale and often result in missing data. We suggest a regression based technique for imputing missing ordinal data. Multilevel cumulative logit model was used with an assumption that observed responses of certain key variables can serve as covariate in predicting missing item responses of an ordinal variable. Individual predicted probabilities at each response level were obtained. Average individual predicted probabilities for each response level were used to randomly impute the missing responses using a uniform distribution. Finally, likelihood ratio chi square statistics was used to compare the imputed and observed distributions. Two other …

Packings And Coverings Of Various Complete Digraphs With The Orientations Of A 4-Cycle., Melody Elaine Cooper

Electronic Theses and Dissertations

There are four orientations of cycles on four vertices. Necessary and sufficient conditions are given for covering complete directed digraphs D_v, packing and covering complete bipartite digraphs, D_m,n, and packing and covering the complete digraph on v vertices with hole of size w, D(v,w), with three of the orientations of a 4-cycle, including C₄, X, and Y.

Perceptions Of Educational Equality In Tennessee: A Comparison Of City School Systems Vs. County School Systems In Northeast Tennessee., Timothy Wade Harrison

Electronic Theses and Dissertations

The majority of city and county school systems throughout Tennessee and the United States at one time or another experience a budget crisis. In the state of Tennessee, school systems are funded through the Basic Education Program, established in 1992 as part of the Tennessee Education Improvement Act. The lawsuit of 1988, Tennessee Small School Systems v. McWherter, created the Basic Education Program. Through the years, the Basic Education Program has provided extra teaching positions, materials, and supplies and has provided the funding formula for school systems throughout the state. Many high-ranking administrators contend that the Basic Education Program …