Digital Commons Network^™

Language, Identity And The Achievement Gap: Comparing Experiences Of African-American Students In A French Immersion And A Regular Education Context, Michelle Georgette Haj-Broussard

LSU Doctoral Dissertations

The Black/White Achievement gap has been a persistent problem in education. Previous research attributed this gap to students' culture (Jenks & Phillips, 1998; Ogbu, 1995a.b) or teachers' expectancy (Rist, 1970). Post-colonial literature suggests that this research itself is oppressive, and that learning is negotiating the "spaces" between students and teachers (Ellsworth, 1997); creating a hybrid "mestiza" space (Anzaldúa, 1987). The openness of immersion to diversity, and its subsequent educational benefits for African-American students (Caldas & Boudreaux, 1999) conforms to this post-colonial perspective. This mixed-methodology study examined both academic achievement and the experiences of Louisiana fourth grade students/teachers in both the …

Of Fathers And Sons: Generational Conflicts And Literary Lineage--The Case Of Ernest Hemingway And Ernest Gaines, Wolfgang Lepschy

LSU Doctoral Dissertations

Focusing on the depiction of the father-son relationship and the generational conflicts in their works, as well as the metaphorical literary father-son relationship between the two authors, this dissertation offers an intertextual reading of the works of Ernest Hemingway and Ernest J. Gaines. Part One examines Hemingway’s Nick Adams stories that feature the young hero’s growing disillusionment with and eventual rejection of his home and family. Parodying conventional stereotypes about Native American ways of life, Hemingway deconstructs prevailing notions of race by aligning Nick’s father with the wilderness and the Indians. Gaines’s earliest short stories focus on a reunion of …

Advanced Turbulence Modeling For Industrial Flows, Raymond Michael Jones

LSU Doctoral Dissertations

This dissertation deals with the development of an improved two-equation turbulence model and its application to various flows. Six different conventional turbulence models were initially tested for predicting the flow inside of an unbaffled stirred tank reactor (STR), and the results are compared with experimental LDV data. Each of the models use low Reynolds number corrections. Results indicate that the radial velocity component in the impeller discharge region is overpredicted by each of the models. The tangential velocity component in the impeller discharge region is predicted well by the models, but is underpredicted near the shaft. The low Reynolds number …

From Gamete Collection To Database Development: Development Of A Model Cryopreserved Germplasm Repository For Aquatic Species With Emphasis On Sturgeon, William Rittenhouse Wayman

LSU Doctoral Dissertations

Development of a cryopreserved sperm repository could greatly benefit the study and recovery of endangered species. Currently, a national repository for endangered aquatic species does not exist. This dissertation addressed the development of methods for the creation of a model germplasm repository, which included methods to reduce bacterial contamination within sperm samples, verify sample identification, store sperm (refrigerated or cryopreserved), evaluate sperm quality before and after thawing, and maintain sample and broodstock information. Although these methods were developed for sturgeon, they could be adapted for any aquatic species. Accurate species identification of sperm samples is essential for an archival repository. …

Dynamic Modeling And Parameter Estimation For An Ethlyene-Propylene-Diene Polymerization Process, Rujun Li

LSU Doctoral Dissertations

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A general dynamic model for continuous EPDM polymerization in which crosslinking and gel formation are attributable to reactions between pendant double bonds has been developed. A pseudo-kinetic rate constant method is introduced to construct a moment model for a pseudo-homopolymer that approximates the behavior of the actual terpolymer under long chain and quasi-steady state assumptions. The pseudo-homopolymer model is then used as the basis for application of the numerical fractionation method. The proposed dynamic model is capable of predicting polydispersities and molecular weight distributions near the gel point with as few as eleven generations, and in the …

Biomechanical Reconstruction Of The Appendicular Skeleton In Three North American Jurassic Sauropods, Ray Wilhite

LSU Doctoral Dissertations

Forelimb and hindlimb articulation, reconstructed musculature, and function were examined in Apatosaurus, Diplodocus, and Camarasaurus. A technique was developed using a Microscribe three-dimensional digitizer to capture external morphological data for skeletal reconstruction and determination of taxonomically useful features. The appendicular musculature of Alligator mississippiensis was dissected to determine form, function, origin, and insertion of muscles to aid in reconstruction of sauropod musculature. Contrary to the literature, M. caudofemoralis longus was found to originate primarily from the lateral surfaces of the proximal chevrons instead of the bodies and transverse processes of the caudals, demonstrating that chevron morphology is indicative of the …

The Nature Of Trust: Conceptual And Operational Clarification, Donna M. Romano

LSU Doctoral Dissertations

The importance of trust in working relationships is widely acknowledged among organizational researchers and practitioners. Unfortunately, trust is defined and measured differently across studies, making it difficult to integrate and compare research findings. Therefore, the purpose of this paper was to clarify the nature of trust as it exists across research and organizational settings. First, trust was conceptualized in terms of 10 defining characteristics based on a convergence and reconciliation of inconsistencies among existing definitions. These 10 characteristics of trust were incorporated into a single definition of trust to offer a more comprehensive description of the construct. Second, the Functional …

Molecular-Dynamics Simulations Of Self-Assembled Monolayers (Sam) On Parallel Computers, Satyavani Vemparala

LSU Doctoral Dissertations

The purpose of this dissertation is to investigate the properties of self-assembled monolayers, particularly alkanethiols and Poly (ethylene glycol) terminated alkanethiols. These simulations are based on realistic interatomic potentials and require scalable and portable multiresolution algorithms implemented on parallel computers. Large-scale molecular dynamics simulations of self-assembled alkanethiol monolayer systems have been carried out using an all-atom model involving a million atoms to investigate their structural properties as a function of temperature, lattice spacing and molecular chain-length. Results show that the alkanethiol chains tilt from the surface normal by a collective angle of 25o along next-nearest neighbor direction at 300K. At …

Characteristics Of Fat Free Yogurt As Influenced By The Incorporation Of Folic Acid, Charles August Boeneke

LSU Doctoral Dissertations

Folic acid fortification is used in the prevention of neural tube defects such as spina bifida and ancencephaly, heart defects, facial clefts, urinary tract abnormalities, and limb deficiencies. Although yogurt is not a good source of folic acid, fortification could aid in prevention of above mentioned defects. Fortification of yogurt with folic acid may or may not change its physico-chemical characteristics. Fat free sugar free yogurt was manufactured using 0, 25%, 50%, 75% and 100% of the recommended daily allowance of 400 micrograms of folic acid. Treatments included addition of folic acid at these levels before and after pasteurization. Lemon …

A Comparison Of Life Histories And Ecological Aspects Among Snappers (Pisces: Lutjanidae), Fernando Martinez-Andrade

LSU Doctoral Dissertations

An extensive search for data on life-history and ecological variables was conducted for a representative number of the species within the family Lutjanidae. After creating different databases and standardizing all data, these variables were examined in statistical, correlation and graphic analyses. Additionally, a series of Principal Component Analyses were used to examine patterns among variables. Life-history variables included age at length zero, asymptotic length, maximum length, longevity, asymptotic weight, length at maturity, age at maturity, reproductive life span, growth rate and mortality rate. Ecological variables included latitudinal and vertical distribution, habitat selection (represented by substrate type), and spawning seasons. The …

A Performance Edition Of The Opera Kaspar Der Fagottist By Wenzel Müller (1767-1835), As Arranged For Harmonie By Georg Druschetzky (1745-1819), Susan Nita Barber

LSU Doctoral Dissertations

This document contains a score of the opera transcription for Harmonie that has been compiled from a manuscript collection currently in the holdings of the Helikon Castle Museum Library in Keszthely, Hungary (H KE 0/117) and arranged by Georg Druschetzky, Bohemian-born oboist and regimental drummer, who spent the major portion of his career working in the small geographical area of Bratislava, Vienna and Budapest. The most significant portion of this collection is extracted from Müller's opera Kaspar der Fagottist. This constitutes the last 15 arias found in Druschetzky's arranged collection of 42 Arias mentioned previously. Included is a presentation of …

Where Have All The Flowers Gone?: A Modular Systems Perspective Of It Infrastructure Design And Productivity, Pratim Datta

LSU Doctoral Dissertations

Assessing value of IT infrastructure investments has been both difficult and ambiguous. This research develops and tests a conceptual framework to understand the productivity process. A lagged and recursive framework is used to trace the relationship between IT infrastructure investments, infrastructure design, and organizational productivity along with contingencies of IT management and the environment. A major contribution of this study is the use of the systems perspective to disaggregate the concepts of IT infrastructure and productivity into collectively exhaustive types. Findings reveal that IT investments do not significant affect productivity but do so when used to develop an IT infrastructure …

Staying In Or Getting Out: Social Capital And Occupational Decision-Making Among Louisiana's Croatian Oyster Harvesters, Carl Marie Riden

LSU Doctoral Dissertations

Social capital-resources embedded in social structures that can be accessed or mobilized by individuals in pursuit of some goal- is the most prominent in a long line of concepts developed by social scientists who wish to incorporate social and cultural elements into models of economic behavior. The research presented here is a qualitative exploration of social capital, its forms and functions, and its relationship to the occupational decision-making of current and former oyster harvesters in Plaquemines Parish, Louisiana. Within this close-knit Croatian-American community, oyster harvesting has a long and rich history. As a result, extensive social capital through which individuals …

Analytical Study On Flood Induced Seepage Under River Levees, Senda Ozkan

LSU Doctoral Dissertations

A common and potentially dangerous phenomenon associated with flooding is seepage under levees and the formation of sand boils. Seepage flow due to hydrostatic head gradients of floods may cause deformation of pervious layers leading to heave, piping and sand boils. Underseepage may also cause irreversible changes in the characteristics of the porous medium. A series of independent flood events may have cumulative effects on pervious layers causing sand boils to grow. Current underseepage analyses for levees are based on steady-state flow. Transient seepage flow due to rapid changes in river head may contribute to cumulative effects and cause critical …

Using Self-Determination Theory To Understand African American Women's Physical Activity Patterns, Joan B. Landry

LSU Doctoral Dissertations

Physical inactivity is a major health risk factor in our society. Women and minority populations are especially at risk with regard to physical inactivity. This three-part study employed quantitative and qualitative methodologies to investigate physical activity behaviors in middle aged and older African American women. This population was chosen because African American women are the least active segment of our society. In the first phase, a quantitative approach was used to investigate relationships between Self-Determination and the Stage of Change for physical activity in a sample of 105 African American women. This study provided validation for using this theoretical approach …

The Transcendental Eigenvalue Problem And Its Application In System Identification, Kumar Vikram Singh

LSU Doctoral Dissertations

An accurate mathematical model is needed to solve direct and inverse problems related to engineering analysis and design. Inverse problems of identifying the physical parameters of a non-uniform continuous system based on the spectral data are still unsolved. Traditional methods, for the system identification purpose, describe the continuous structure by a certain discrete model. In dynamic analysis, finite element or finite difference approximation methods are frequently used and they lead to an algebraic eigenvalue problem. The characteristic equation associated with the algebraic eigenvalue problem is a polynomial. Whereas, the spectral characteristic of a continuous system is represented by certain transcendental …

Regimes, Institutions And Foreign Policy Change, David Baker Huxsoll

LSU Doctoral Dissertations

This dissertation examines the effects that different political regime types and institutional arrangements have on the amount of foreign policy change occurring a state. Scholars in International Relations studying the democratic peace have identified a relationship between characteristics of democracy and non-democracy and the behavior of states. Scholars in Comparative Politics have noted that certain institutions more easily facilitate policy change. This dissertation synthesizes these perspectives and develops and tests a number of hypotheses relating regime type, institutional arrangement, and party system to the amount of foreign policy change a state undertakes. Employing a pooled, cross-sectional time series design, the …

Population Structure And Genetics Of Longevity In A Colony Of Dog Guides, John B. Cole

LSU Doctoral Dissertations

The objectives of this study were the description of changes in genetic diversity in a colony of dog guides since its founding, and the investigation of the genetics of longevity in that population. Two breeds of dog, German Shepherds (GS) and Labrador Retrievers (LR), were evaluated. There were rapid increases in average pairwise relationship in both breeds, although the average was approximately one-third higher in the GS population than in the LR population. A similar trend was observed for average inbreeding. In the current generation, relationship and inbreeding for all animals averaged 25.3% and 26.2% in GS and 15.5% and …

Design And Synthesis Of Constrained Dipeptide Units For Use As Β-Sheet Promoters, Umut Oguz

LSU Doctoral Dissertations

The study of factors promoting beta-sheet formation has recently gained interest due to the suspected involvement of beta-sheets in brain degenerative diseases such as Alzheimer's disease (AD), Creutzfeldt-Jacob disease (CJD) and bovine spongiform encephalopathy. Understanding beta-sheet formation and the factors that stabilize beta-sheet structure may serve as a basis for future drug design. The extended structure of a beta-sheet can be stabilized by constrained amino acid analogs that are pre-organized to adopt the extended conformation. In this dissertation using innovative synthetic organic chemistry methods, two dipeptide units are designed and synthesized that are constrained to form the extended conformation and …

Genetic Mapping Of Agronomic Traits From The Interspecific Cross Of Oryza Sativa (L.) And Oryza Glaberrima (Steud.), Gabriel Kayode Aluko

LSU Doctoral Dissertations

Wild relatives of cultivated rice varieties offer new genetic sources for enhancing economic value, but traditional interval mapping techniques have not gained widespread support among applied researchers for marker assisted selection. The objectives of this study were to detect quantitative trait loci (QTL) for agronomic traits in a hybrid mapping population and compare the non-parametric Discriminant Analysis (DA) procedure with traditional approaches for accuracy and precision. In addition, the effects of population structure on marker-assisted classification were explored. A molecular linkage map comprising 100 SSR markers that spanned the rice genome at intervals of 10.5 cM on the average was …

Rotary Kiln Incineration Of Hazardous Wastes: Pilot-Scale Studies At Louisiana State University, John Sutherland Earle

LSU Doctoral Dissertations

Studies of incineration of surrogates for hazardous wastes are conducted in the pilot-scale rotary kiln incinerator (RKI) at Louisiana State University (LSU) in Baton Rouge, Louisiana. The purpose of the research is to investigate methods of treating and destroying hazardous wastes in a cost-effective and environmentally sound way. The objective is to provide process data that will contribute to increased knowledge for RKI design and operation. The LSU facility is a College of Engineering Combustion Laboratory that is unique in its large size as a university laboratory. It is equipped with individual instruments for analysis of O₂, CO, …

The Impact Of Louisiana's School And District Accountability System On Students' Performance On The State Mandated Criterion Referenced Test, Linda B. Tolbert

LSU Doctoral Dissertations

This study is aimed at determining the impact of Louisiana’s School and District Accountability System on students’ performance on the state mandated criterion-referenced test (LEAP 21). The study was designed to determine the extent to which teachers in Title I schools in a large urban district in southwest Louisiana have turned to instructionally unsound practices in response to a high-stakes accountability system. The specific objectives addressed in this study were to: 1) Explore if test scores have changed beyond what would be expected given the cohort design of the accountability model. 2) Explore if test scores have changed and determine …

Design And Synthesis Of Handles For Solid-Phase Peptide Synthesis And Convergent Peptide Synthesis, Jose Giraldes

LSU Doctoral Dissertations

The recent popularity of methods for solid-phase peptide synthesis that use the 9-fluorenylmethyloxycarbonyl (Fmoc) group for N^α-amino protection has created a need for compatible anchoring linkages and handles. In an effort to develop mild new methods for use in solid-phase peptide synthesis (SPPS), a new ferrocene containing linker or “handle”, the 1’1-ferrocenyl carboxaldehyde handle was designed, synthesized, characterized and tested. This linker is analogous to those commercially available and developed by Barany. The ferrocenyl amine linker(FAL) releases C-terminal peptide amides upon acidolysis. Since the FAL handle is acid labile it is compatible with Fmoc and N^α-dithiasuccinoyl …

Characterization Of Syntactic Foams And Their Sandwich Composites: Modeling And Experimental Approaches, Nikhil Gupta

LSU Doctoral Dissertations

Hollow particle filled polymers known as syntactic foams are lightweight and highly damage tolerant. Syntactic foams are used as core materials in sandwich composites. The use of such materials in aeronautical and space structures make it necessary to understand their characteristics for various environmental and loading conditions. The first part of the present work takes modeling and finite element analysis approach to understand and predict the deformation behavior of syntactic foams. Contact analysis is performed on single particle models by the finite element analysis approach. In the second part extensive experiments are carried out to characterize syntactic foams for hygrothermal …

Barriers To Participation In Educational Programs As Perceived By First-Time Enrolling Freshmen In Higher Education, Julie Cason Mcdonald

LSU Doctoral Dissertations

Institutions of higher education face exceptional challenges in today’s environment. College costs are increasing, funding is decreasing and/or limited, public confidence is diminishing, the work-place is changing, and a shrinking pool of traditional-age college students exists. This creates an environment where colleges and universities find themselves competing for students. So that these institutions of higher education may better understand how to recruit, advise, and retain students, one must consider the barriers first-time freshmen encounter in the pursuit of formal learning as they enter college. The purpose of this study, therefore, was to determine the perceived barriers to educational participation held …

The Effects Of An Evening Structured Problem-Solving Procedure In Undergraduate College Students With Insomnia, Colleen E. Carney

LSU Doctoral Dissertations

Worry is often reported as interfering with sleep onset and sleep maintenance, and pre-sleep cognitive arousal can persist after successful behavioral treatment of insomnia. The present investigation will examine the effects of a "constructive worry" procedure in an undergraduate population with impaired sleep. Thirty-three undergraduate students who reported three or more nights per week in the last month of sleep onset and/or sleep maintenance problems, either recorded worries and possible solutions (experimental CW group) or recorded worries and completed worry questionnaires (control Worry group) for five nights. As hypothesized, the CW group had decreased pre-sleep cognitive and overall arousal relative …

Water Resource Management By The Ancient Maya Of Yucatan, Mexico, Terance Lynn Winemiller

LSU Doctoral Dissertations

Since the publication of popular accounts of exploration by adventurers such as John Lloyd Stephens captured the attention of an audience eager for tales from exotic places, scholars of the ancient civilizations of Mesoamerica have been fascinated with the silent crumbling remains of ancient Maya cities that dot the cultural landscape of Yucatán in staggering numbers. Scientific research began in earnest nearly one hundred years ago with the first of many great Carnegie Institution of Washington, D.C. archaeological projects. Most researchers mention water resources in their reports, but no attempt has been made to study water resource management on a …

Characterization Of Native And Bypass Human Coronary Artery Plaque Deposits From The Same Heart: Investigation Of The Chemical Form Of Calcium In Human Coronary Artery Plaque Deposits, Serigne Thiam

LSU Doctoral Dissertations

Gradual deposits of lipids, proteins, and calcium on the coronary arterial walls cause atherosclerosis, leading to blockage of the blood flow and possible heart attack. Despite many studies, the mechanism underlying these processes remains unclear. In this research, differences between native and bypass plaque deposits from the same heart were examined. In addition, the crystalline and the amorphous plaques within these native and bypass vessels were characterized. The techniques used to characterize the deposits included inductively coupled plasma mass spectrometry (ICPMS), solid-state nuclear magnetic resonance (NMR), high performance liquid chromatography (HPLC), etc. The results from the ICPMS technique showed that …

The Institutional Determinants Of Property Regime Change In New Democracies: The Russian Federation, Hungary, And Czechoslovakia, R. Vanessa Krasner

LSU Doctoral Dissertations

Is there a relationship between the design of democratic institutions and optimal collective decisions? Optimum decisions are defined as achieving goals important to the transition such as deep and equitable property reforms. Democratic institutions refer to first-order institutions of governance and the electoral rules for choosing leaders. Overseeing both are the written or "parchment" constitutions. Constitutions are designed to distribute power among actors, generate efficiency, and govern the interactions among actors. My findings showed that constitutional designs intentionally and sometimes with unanticipated consequences can result in highly cooperative, competitive, or conflictual struggles by political actors over high-stakes distributive issues such …

Development Of The Neonatal Rat As A Model For Sudden Infant Death Syndrome: Cardiorespiratory Effects Of Ethanol, Rhett Whitman Stout

LSU Doctoral Dissertations

The current pathogenesis of Sudden Infant Death Syndrome (SIDS) is unknown. Elevated endogenous ethanol production by gastrointestinal yeast has been proposed as a possible mechanism for SIDS. To investigate the role of ethanol in SIDS, three studies were undertaken. In the first study, transcutaneous blood gas technology was evaluated for repeated monitoring of arterial blood gases. The second study identified the cardiorespiratory responses to inhaled CO2 challenge in juvenile rats, to determine the age corresponding to the age range of peak incidence of SIDS in human infants. Finally, utilizing the optimized juvenile rat model, the cardiorespiratory responses to ethanol and …