Digital Commons Network^™

Parallel Molecular Dynamics Simulations Of Antimicrobial Peptides, Svetlana V. Oard

LSU Master's Theses

Molecular dynamics (MD) simulations of the wheat antimicrobial peptide â-purothionin were carried out in explicit water (~14,000 atoms) using an all-atom model. The structural properties of the peptide as a function of MD simulation, temperature, and presence of the mono- and divalent metal ions were investigated. The accuracy and scalability tests of the code Peach 3.8 for our system were performed on the Intel Xeon-based Linux cluster SuperHelix at Louisiana State University (LSU). The code showed the reliable accuracy and the parallel efficiency of 0.61 for ~14,000 particles on 16 processors. The microcanonical (MC) MD simulation of â-purothionin in water …

State-Level Environmental Risk Perception: An Analysis Of 20 Comparative Risk Reports, Mandy Green

LSU Master's Theses

Research was conducted to identify the states that compiled Comparative Risk Reports and the year in which the study was completed. The information relating to the type of committee that compiled the risk report and the final risk rankings was examined. State Comparative Risk Reports were collected for twenty states and the risk rankings that each state compiled were reviewed to determine which states ranked third generation environmental problems and the ranking that those problems were given. The risk reports compiled by each state were also used to determine which states ranked natural resource based problems and the ranking that …

Analysis Of Factors That Affect Responding In A Two-Response Chain In Children With Developmental Disabilities, Stephanie Ann Contrucci Kuhn

LSU Doctoral Dissertations

Behaviors that are appropriate, inappropriate, or a combination of both can be linked together in a behavior chain. When the contingencies for one response change (e.g., reinforcement is withheld for the last response in the chain; the last response is reinforced even if it occurs without the other responses in the chain) or the environmental conditions change (e.g., access to the reinforcer is available independent of responding), the other responses in the chain may be affected. Little is known about these types of effects on behavior chains. Several operant processes may disrupt behavior chains. The purpose of this study was …

Partitioned Pricing: Can We Always Divide And Prosper?, Bidisha Burman

LSU Doctoral Dissertations

Research on partitioned pricing suggests that separating the surcharges from the base price of the advertised product may lead to a more favorable effect on consumers' evaluation of the offer compared to a combined presentation of the base price and the surcharge. In this dissertation we propose that partitioned price presentation may not always result in positive outcomes vis-à-vis combined presentation of prices. We propose that consumers' need for cognition and the perceived reasonableness of the surcharge are likely to influence their evaluation of partitioned versus combined prices. Based on cue diagnosticity, Persuasion Knowledge Model, and Characterization-Correction Model we develop …

William Faulkner And The Oral Text, Gregory Alan Borse

LSU Doctoral Dissertations

The disjunction between the oral and the literate in the works of William Faulkner reveals the different ways these distinct modes of organization combine to structure a text. The oral in Faulkner's fiction makes its presence known not only as offset speech but also as a mode of action and narrative whose logic is conjunctive rather than disjunctive. According to the literate mode, a form organizes novelistic matter. According to the oral mode, forces that function as signs rather than organizers of their form rule the action and narrative. When the disjunction between the oral and the literate is so …

The Myth Of Charismatic Leadership And Fantasy Rhetoric Of Crypto-Charismatic Memberships, Shaun Robert Treat

LSU Doctoral Dissertations

This study will analyze the relationship between myth and the fantasy rhetoric of charismatic leadership by employing Fantasy Theme Analysis to examine the pervasive discourses invoking this enduring folk belief. Fantasies of the Charismatic Superhero are explored within the popular leadership treatises of successful “management gurus” and in our popular culture entertainments. The rhetorical visions of Stephen Covey’s “Principle-Centered Leadership,” Jim Collins’ “Level 5 Leadership,” and Manz and Sims' “SuperLeadership” are examined for their displacement of charismatic leadership in favor of the empowered crypto-charisma of self-leading memberships. Findings suggest “empowerment” rhetorics, like the rhetorical visions championed by many populist “gurus,” …

Effective Literacy Instruction In The Elementary Grades, Marie Laurent Bergeron

LSU Doctoral Dissertations

The purpose of this study was to identify elements present in effective literacy instruction, i.e., those elements that fostered reading, speaking, listening, thinking, writing, and metacognitive skills. By examining variables that promoted literacy acquisition and achievement, a detailed account resulted which described classroom practice as related to teacher beliefs, strategies, materials, and classroom climate. The primary method of qualitative analysis used for this study was the Developmental Research Sequence (DRS) Method (Spradley, 1980). Two classrooms with exemplary teachers were studied extensively. Data collection involved the use of primary sources (interviews, observations, and student and teacher work) and secondary sources (records, …

Integrating A Technology-Enriched Curriculum: Ethno-Case Study, Juliette D. Angers

LSU Doctoral Dissertations

The purpose of this qualitative study was to provide an examination of beliefs, context factors, and practices of exemplary teachers that lead to a technology-enriched curriculum. Three middle school teachers participated. Using both direct and participant observation the Spradley model was followed with three rounds of observations: (1) descriptive, (2) focused, and (3) selective. Interviews were conducted with open-ended questions and documents were collected from the parish website. This research provides: (1) up-to-date information on what and how educational technology is used today; and (2) information which gives other educators an understanding of what beliefs and context factors influence teachers …

A Qualitative Exploration Of Students' Experiences With Tutorial Learning, Angela Alexander

LSU Doctoral Dissertations

The purpose of this study is to explore how students perceive their tutorial learning experiences at the collegiate level in a campus-based center and to explore the personality preferences of the students who participate in tutoring, according to the Myers-Briggs Type Indicator (MBTI). The study is designed to address tutoring from the perspective of the tutee’s experiences and to allow them to tell their story of how tutoring impacted their academic experience. The following research questions guide this study: 1. What are students’ perceptions of their tutorial learning experiences? 2. Are students’ perceptions of their tutorial learning experiences related to …

Cost Effective And Sequential Methods For Teaching Educational Paraprofessionals To Implement Behavior Management Strategies In Preschool Classrooms, Natalie Jan Slider

LSU Doctoral Dissertations

This study examined the efficacy of cost effective and sequential training methods for teaching educational paraprofessionals to implement behavior management strategies in preschool classrooms. Investigation of the effects of increasingly complex and time consuming methods of training on both paraprofessional and student behaviors were evaluated. Training methods employed included written take-home manuals and summary cards, modeling videotapes, and performance feedback. Training materials included three behavior management strategies (e.g., instruction-giving, praise, and time out) that have shown to have extensive support in the empirical literature (Brophy, 1981; Budd, Riner, & Brockman, 1983; Flanagan, Adams, & Forehand, 1979; O’Dell, Krug, Patterson, & …

International Ffa School To School Linkage Program: Case Studies Of Two Familes, Bradley Allen Leger

LSU Doctoral Dissertations

The National FFA Organization is an agriculturally-based youth organization in the United States which has been providing/facilitating international experiences for its members for a number of years. One of these programs is the International FFA School to School Linkage Program (SSLP), in which selected American agricultural education/FFA programs are linked with specialized secondary agricultural schools/lyceums located in one of the countries of the former Soviet Union (FSU). The program’s main mission is for American students and teachers to share ideas with their FSU counterparts about the initiation and maintenance of small-scale agricultural entrepreneurships based on the United States’ agricultural education …

The Effect Of Program Commitment On The Degree Of Participative Congruence And Managerial Performance In A Budgeting Setting, Kevin T. Breaux

LSU Doctoral Dissertations

The purpose of this research endeavor is to investigate the effect that the degree of participative congruence has on the relationship between program commitment and managerial performance. The degree of participative congruence (Clinton and Hunton 2001) is a new measure of participation designed to determine the amount of congruence between the perceived need for participation and the degree of participation allowed. This study used a questionnaire to evaluate the antecedents of and effects of the degree of participative congruence (DPC) in a budgeting setting. In order to investigate these effects, the questionnaire was mailed to a sample of 1,500 AICPA …

What Irritates Consumers?: An Empirical Examination Of The Antecedents And Consequences Of Consumer Irritation, Sweta Chaturvedi Thota

LSU Doctoral Dissertations

This dissertation develops a model of consumer irritation in the context of consumer decision-making. Thus, the purpose is to describe and empirically test a model of the antecedents and consequences of consumer irritation. The model incorporates antecedents, moderators and consequences of irritation. It is suggested that irritation in consumers has a direct as well as an indirect influence, through retention of irritation in consumers, on the outcome variables such as attitude towards the advertised brand, and intentions to engage in negative word of mouth (NWOM) behavior. The central aim of this dissertation is to extend our understanding of the irritation …

Effects Of Gp130 Cytokines On Adipocytes, Sanjin Zvonic

LSU Doctoral Dissertations

Members of the gp130 cytokine family are known for their pleiotropic roles in various cell types. Our work has focused on their actions in adipocytes. CNTF administration has been shown to ameliorate most complications associated with obesity and type 2 diabetes through an unknown mechanism. In this study CNTF is shown to activate JAK/STAT and MAPK signaling, both in vitro and in vivo. In 3T3-L1 adipocytes, chronic CNTF also regulates the expression of SREBP-1, FAS, IRS-1 and GLUT4. Acute CNTF administration enhances the activation of IRS-1 and Akt by insulin. Our data also demonstrate that the expression of CNTF-specific receptor, …

Quantification Of Marine Sediment Properties From Planar And Volumetric Pore Geometries, Allen Hagerman Reed

LSU Doctoral Dissertations

Pore geometry and topology are important determinants of sediment physical properties, such as porosity and permeability. They also influence processes that occur in the sediment, such as acoustic propagation, attenuation, and dispersion, single- and multi-phase fluid flow, and hydrodynamic dispersion. This study uses images to evaluate pore geometry and topology of ooid (subspherical particles) and siliclastic (angular quartz) sand that was collected from the marine environment south of Bimni Bahamas and Ft. Walton Beach, FL, respectively. Image analysis techniques and predictive tools enable insight into the relationships among sediment pore geometry, topology, and physical properties for these differently shaped sands. …

Direct-To-Consumer Advertising Of Prescription Medicines: Framing With Imprecise Frequency Descriptors, Mikah Zangla

LSU Master's Theses

The purpose of the study was to determine how often and to what degree “imprecise frequency descriptors” are used in prescription drug print ads. These descriptors along with the side effects they describe were compared to their corresponding prescription medicine websites and analyzed to determine whether or not the general public is being misinformed and/or misled in terms of side effect warnings by current drug advertising. Content analysis of Direct-to-Consumer (DTC) prescription drug advertisements found in five of the top seven magazines most likely to be consumed by readers over age 65 was the method of investigation for this study. …

Comparison Of The Efficiency Of Utilization Of Amino Acids From Intact Protein And Amino Acids In Crystalline Form By Channel Catfish, (Ictaluras Punctatus), Amogh Arun Ambardekar

LSU Master's Theses

Two laboratory feeding trials were conducted to quantify differences in the digestibility and absorption of dietary amino acids provided in intact protein or in purified amino acid mixtures. In the first experiment, 36 channel catfish (346 ± 47 g) were force-fed one of six practical feed ingredients (blood meal, corn meal, fish meal, meat and bone meal, soybean meal or wheat middlings), or a mixture of crystalline amino acids designed to duplicate the amino acid composition of each of the practical ingredients. Apparent digestibility coefficients (ADC) were calculated for 15 amino acids in each practical ingredient and in each amino …

Phylogenetic Influence Of Complex, Evolutionary Models: A Bayesian Approach, Neeraja M. Krishnan

LSU Master's Theses

Molecular evolution recovers the history of living species by comparing genetic information, exploring genome structure and function from an evolutionary perspective. Here we infer substitution rates and ancestral reconstructions, to better understand mutation responses to some known biochemical phenomena. Mutation processes are commonly inferred using parsimony, maximum likelihood and Bayesian. Parsimony is not explicitly model-based, and is statistically biased due to unrealistic assumptions. The model-based maximum likelihood approaches become computationally inefficient while analyzing large or high-dimensional datasets, leaving little opportunities to incorporate complex evolutionary models. We implemented a posterior probability (Bayesian) approach that evaluates evolutionary models, applying it to primate …

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 …

180 Degrees: An Extension Of Self In Photography, Bradly Dever Treadaway

LSU Master's Theses

180 Degrees is a conceptual body of digital photography and video that deals with self-portraiture, identity and change. Intended to serve as a form of therapy, the work analyzes who I have become over the last couple of years by illustrating issues of compulsion, obsession and insecurity. The investigation confronts unexpected and unsettling attributes of my character. Some of it is a little uncomfortable for me to reveal but if nothing else it is the truth.

Arrive, Explore, Reflect: The Development And Evaluation Of A Web-Based Program To Introduce High School Students To Landscape Architecture, Courtney Bailey

LSU Master's Theses

The profession of landscape architecture has struggled with public perception since the mid-nineteenth century. Community programs, coloring books, and educational toolkits are just some of the methods employed in the profession's attempt to improve public perception. Very little research has been conducted to test the efficiency of these educational attempts. The goal of this thesis is to create a Web-based program to effectively educate young members of the public. The program uses five "mini lessons" to present information about landscape architecture to the student. Links to the World Wide Web are scattered throughout the program to supplement lesson material. A …

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, …

The Atchafalaya Basin Proposal For Nomination To The World Heritage Site List, Mitchell W. Coffman

LSU Master's Theses

The Atchafalaya Basin in the Southern United States is a cultural, environmental, historical and natural land region of such universal importance, designation as a World Heritage Site is appropriate. This thesis provides a justification for this designation through compliance with cultural and natural criteria detailed in the Convention Concerning the Protection of the World Cultural and Natural Heritage of 1972. The treaty, also known as the World Heritage Convention (WHC) promotes natural and cultural landscape preservation on an international level. This thesis lists the cultural and natural arguments for nominating the Atchafalaya Basin to the World Heritage Site list.

National, …

Temperature Effects On Spawning And Fingerling Production Of Channel Catfish Ictalurus Punctatus, Patrice Arnold Pawiroredjo

LSU Master's Theses

The goal of this study was to develop several techniques that utilize the use of geothermal water that can contribute to increased profitability for commercial catfish producers. The primary objectives of this study were to: 1) determine the heating requirement using degree-days of channel catfish spawning 2) improve the efficiency of artificial spawning and, 3) evaluate the effectiveness of stocking outdoor ponds and pools with channel catfish fry. The heating requirement for channel catfish spawning was determined to be between 99 and 129 degree days at the peak of spawning. There was no difference in degree-day values between spawns collected …

Developmentally Appropriate Practice: A Case Study Of Mentoring For Teacher Change, Judi Martin Mccaslin

LSU Master's Theses

This project was a qualitative case study that recorded and analyzed the professional development of one certified elementary teacher as she studied developmentally appropriate practice (DAP) and pursued her Pre-K and Kindergarten add-on certification. It focused on the changes in her classroom practice from mostly developmentally inappropriate practice (DIP) at the beginning of the project towards mostly DAP at the end of the project. The project recorded her acquisition of concrete knowledge about DAP, and her beliefs regarding DAP as she taught young children over the course of one year, June 2003 through May 2004. It included study of the …

Evaluation Of The Usda Shafter Cotton (Gossypium Spp.) Collection For Agronomic And Fiber Traits, Jimmy Xavier Zumba

LSU Master's Theses

Many recent additions to the US Cotton Germplasm collection are uncharacterized for common germplasm descriptors. Our objective was to evaluate a subset of this germplasm for their potential to contribute to future plant improvement efforts. One hundred fifty four cotton germplasm lines from the former USDA cotton breeding program at Shafter, California were evaluated in the field (LSU AgCenter Northeast Research Station, Saint Joseph, LA) in 2003 along with three modern commercial varieties (Delta and Pine Land �Deltapearl�, �Fibermax 958�, and �Phytogen 355�). Due to limited seed availability, an unreplicated modified augmented statistical design-2 was used, with single row plots …

The Relationship Among Alcohol Consumption, Dietary Intake, And Body Mass Index In Young Adults, Mary C. May

LSU Master's Theses

This study was designed to assess the relationship of alcohol consumption, dietary intake, and body mass index (BMI) in 1,335 young adult males and females aged 20-38 years (62% female and 27% black) who were part of the Bogalusa Heart Study. Data were collected in 1995-1996 on dietary intake and alcohol consumption patterns. The prevalence of alcohol consumption was higher in males compared with females and higher in whites than blacks. Among drinkers, whites and blacks did not differ in the amount of alcohol consumed. Energy from alcohol was also greater in males than in females. Total energy intake did …

The Myth Of Eternal Preservation: Patterns Of Damage In Egyptian Mummies, Ellen Salter-Pedersen

LSU Master's Theses

Mummification can preserve a body for several millennia, but it is a popular misconception that these bodies are in pristine condition. The activities of tomb robbers, archaeological excavation and transportation, and the embalming process itself may damage the body. This thesis examines published reports on Egyptian mummies from museums in the United States, Europe, and Egypt for the presence of osteological fractures, dislocations and other related damage. These reports include biographical information and the results of investigations made by one or more of the following techniques: unwrapping, autopsying, x-raying, and CT-scanning. Data on 275 Egyptian mummies were collected and examined …

The Sports Appeal: Are Atheletics A Viable Academic Marketing Vehicle In Higher Education?, Reagan Thomas Chenevert

LSU Master's Theses

Universities are beginning to brand themselves. The days when the doors to higher-ed opened and students flooded into the classrooms are no more. Colleges have to find ways to separate themselves from each other in a noisy marketplace. Also there is a decline in newsroom resources for academic coverage, which leaves university marketers searching for ways to communicate their messages. However, universities have another available marketing outlet, which is not seeing declining media attention: sports. College sports are a big business, which generate national media attention. The Southeastern Conference had revenues of over $100 million from the marketing of its …

Gringo And Teacher: A Study Of Professional Self-Formation Through Cross-Cultural Research, John Shock

LSU Master's Theses

This thesis is, in large part, the story of the author’s transformation from a teacher/researcher who studies others to one who studies himself. It is a story that unfolds against the backdrop of his experiences as a teacher, student, and researcher conducting qualitative research into issues of education in Louisiana and Mexico during the three-year period from the spring of 2001 to the spring of 2004—a tumultuous time in American history by any measure. At the heart of this thesis lies the decision to adopt a research approach that is more personal and open-ended than purposeful and intentional. It is …