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Synthesis And Properties Of Novel Macrocycles And Related Chromophoric Benzenoid Compounds, Jorge O. Escobedo Cordova Jan 2002

Synthesis And Properties Of Novel Macrocycles And Related Chromophoric Benzenoid Compounds, Jorge O. Escobedo Cordova

LSU Doctoral Dissertations

The synthesis and properties of some macrocyclic compounds of interest are presented. Resorcinarenes with functionalized conjugated rigid rods made of oligo-p-phenylenes would lead to an entirely new class of functional, soluble, well-defined architectures impacting a variety of multidisciplinary research efforts. The general synthetic design described in this document could be readly extrapolated to include other electronic systems such as heteroaromatics and polyenes. An extensive collaborative study of chromophore formation in resorcinarene solutions is also described here. The study reveals that upon oxidation, the reversible conversion to acyclic precursors occur first, and then these precursors undergo oxidation to quinoid-type compounds (xanthenes). …

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The Relationship Between Perceived Leader Behavior And Alcohol Consumption Among University Students Who Are Members Of Social Fraternities, Joe Randy Gurie Jan 2002

The Relationship Between Perceived Leader Behavior And Alcohol Consumption Among University Students Who Are Members Of Social Fraternities, Joe Randy Gurie

LSU Doctoral Dissertations

The primary purpose of this study was to determine the influence of selected personal and institutional demographic characteristics on the alcohol consumption of students enrolled in a research extensive university in the southern portion of the United States who were members of a social fraternity. The two main goals of this study were: 1) to determine if a relationship existed between the level of alcohol consumption and the perceptions of the effectiveness of the current organizational leadership among students who were members of social fraternities at a research extensive university in the southern portion of the United States and 2) …

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Timber, Trade, And Transformation: A Historical Geography Of Mahogany In Honduras, Craig Stephen Revels Jan 2002

Timber, Trade, And Transformation: A Historical Geography Of Mahogany In Honduras, Craig Stephen Revels

LSU Doctoral Dissertations

Combining archival and field investigation, this study reconstructs the historical geography of mahogany in Honduras. Focusing on the north coast, its temporal focus stretches from the mid-eighteenth century through the last years of the nineteenth century. This incorporates the earliest stages of the commercial mahogany trade in Honduras, its decline and subsequent rebirth, its boom period in the mid-1800s, and its eventual decline. The initial chapters of the study address cultural aspects of the mahogany trade. The mahogany extraction process is examined in detail to provide a foundation for discussion of the expansion and development of the trade itself. With …

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A Comparison Of Louisiana Secondary Career And Technical Teachers And Academic Teachers On Learning Type And Perception Of School Climate, Tracy Andries Beard Jan 2002

A Comparison Of Louisiana Secondary Career And Technical Teachers And Academic Teachers On Learning Type And Perception Of School Climate, Tracy Andries Beard

LSU Doctoral Dissertations

The purpose of this study was to investigate the relationship between Louisiana public secondary school teachers' primary learning type and teaching area; and the influence of learning type and teaching area on the teacher's perception of school climate. A total of 293 Louisiana public secondary school teachers participated in the study. An instrument with three parts was used to collect data for this study: demographics, Learning Type Measure and Organizational Health Inventory. Over two-thirds of the respondents were female. Mean age was 43 years and mean teaching experience was 16.41 years. Over three-fourths of respondents were white while over 50% …

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Dynamic Econometric Modeling Of The U.S. Wheat Grain Market, Carlos Walter Robledo Jan 2002

Dynamic Econometric Modeling Of The U.S. Wheat Grain Market, Carlos Walter Robledo

LSU Doctoral Dissertations

Structural-time series models have not gained much ground in commodity market modeling despite the overwhelming popularity of time series approaches in forecasting and dynamic analyses. This dissertation contributes by applying developments in seasonal cointegration and structural-time series analysis (e.g., Zellner and Palm (1974); Hsiao (1997); Lee (1992); Franses and Kunst (1999); Ghysels and Osborn, 2001) to the study of agricultural commodity markets. The focus is on three research themes. The first theme investigates the role of cointegration and seasonal cointegration for market data, an issue considered timely because most applications assume deterministic seasonal components. The second issue breaks new ground …

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Modeling Canopy Structure Effects On Loblolly Pine Growth, Mauricio Jerez Rico Jan 2002

Modeling Canopy Structure Effects On Loblolly Pine Growth, Mauricio Jerez Rico

LSU Doctoral Dissertations

This study examined several aspects of canopy structure and their influence on growth of loblolly pine (Pinus taeda L.) plantations. Foliage distribution, crown hydraulic architecture, and the effect of chronological changes in canopy structure on stand development were explored as possible components of a future process-based model intended for management purposes. A model based on the Johnson’s SB distribution was developed to predict leaf area distribution of loblolly pine trees. This is a preliminary step for building a submodel capable of simulating chronological changes in canopy structure and stand growth. The model accurately predicted the cumulative distribution of leaf area …

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The Role Of Cysteine 230 And Lysine 238 Of Biotin Carboxylase In The Deprotonation Of Biotin And Synthesis Of Bisubstrate Analogy Inhibitor Of Carboxyltransferase, Keith Logan Levert Jan 2002

The Role Of Cysteine 230 And Lysine 238 Of Biotin Carboxylase In The Deprotonation Of Biotin And Synthesis Of Bisubstrate Analogy Inhibitor Of Carboxyltransferase, Keith Logan Levert

LSU Doctoral Dissertations

Acetyl-CoA carboxylase catalyzes the first step in the synthesis of fatty acids. The Escherichia coli form of the enzyme consists of a biotin carboxylase protein, a biotin carboxyl carrier protein, and a carboxyltransferase protein. This enzyme uses the cofactor biotin as a carboxyl carrier. In order for the carboxylation of biotin to occur, biotin must be deprotonated at its N-1 position. It has been proposed that the active site residues cysteine 230 and lysine 238 act as an acid-base pair to deprotonate biotin. To test this hypothesis, site-directed mutagenesis was used to mutate cysteine 230 to alanine (C230A) and lysine …

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Electronic And Structural Properties Of Rare Gas Cation Clusters, Jose Alejandro Gascon Jan 2002

Electronic And Structural Properties Of Rare Gas Cation Clusters, Jose Alejandro Gascon

LSU Doctoral Dissertations

We study structure and ground and excited state properties of rare gas cation clusters, Rg+N, for N=3-60. The main goal is to understand how the positive charge is delocalized over the cluster and the relationship between cluster geometry and delocalization. He+N, Ar+N, and Xe+N are selected as representatives of the rare gas elements. We perform Monte Carlo simulations to obtain finite temperature properties of the energy spectrum. The Hamiltonian of the system is based on a semi-empirical model whose parameters are obtained through the fitting of experimental and calculated …

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The Influence Of The Use Of Recommended Management Practices On Milk Production In Southeast Louisiana, Ronald David Bardwell Jan 2002

The Influence Of The Use Of Recommended Management Practices On Milk Production In Southeast Louisiana, Ronald David Bardwell

LSU Doctoral Dissertations

The dairy industry in Southeast Louisiana is one of the largest agricultural industries, with a gross farm value of over 74 million dollars. Much of the economy of Southeast Louisiana parishes depends on the dairy industry. Therefore, improvements in production efficiency and/or effectiveness would have an enormous impact on the parish economy. This study identifies the use of recommended practices by dairy producers, thus allowing educational programs to be focused on specific areas of greatest need. The purpose of the study was to describe the management practices of Southeast Louisiana dairy producers and to determine if a relationship existed between …

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An Analysis Of Student Collaboration And Task Completion Through Project Based Learning In A Web-Supported Undergraduate Course, William Randall Thomas Jan 2002

An Analysis Of Student Collaboration And Task Completion Through Project Based Learning In A Web-Supported Undergraduate Course, William Randall Thomas

LSU Doctoral Dissertations

Over the past decade calls for reform in higher education have emphasized that education should become less instructor centered with students taking a more active role in their learning. Moreover, there is increasing pressure on university professors to implement student centered teaching strategies that negate time and place restrictions of the classroom by integrating technologies that support the active engagement of students through Internet based applications. The goal of this study was to gain insights into the interactions that occur in online communications in a project-based learning activity. Twenty-one undergraduate students participated in the study while completing a component of …

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Spatial Models Of Hawaiian Streams And Hawaiian Stream Fish Habital, James Elliott Parham Jan 2002

Spatial Models Of Hawaiian Streams And Hawaiian Stream Fish Habital, James Elliott Parham

LSU Doctoral Dissertations

A series of spatially based models of Hawaiian streams and stream fish habitats were developed to aid in the conservation of native fishes. The spatial models focused on the quantification of habitat for native fishes at three levels within a spatial hierarchy. First, at the reach level, the models classified the major geomorphological features of a stream and its watershed to determine the distribution of fish habitat within the different sections of the stream. The distribution of habitat was combined with habitat suitability criteria and the migratory abilities of the native fishes to quantify available habitat and predict expected community …

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Branch, Crown, Tree And Stand Water Flux In An 180-Year-Old Loblolly Pine Plantation After Thinning, Fertilization, And Throughfall Exclusion Treatments, Shufang Yu Jan 2002

Branch, Crown, Tree And Stand Water Flux In An 180-Year-Old Loblolly Pine Plantation After Thinning, Fertilization, And Throughfall Exclusion Treatments, Shufang Yu

LSU Doctoral Dissertations

Branch and tree sap flux density (SFD) was measured to evaluate the effects of thinning, fertilization, and throughfall exclusion treatments on water use by loblolly pine (Pinus taeda L.) trees. Variations in SFD at different radial xylem depths were also examined to improve estimates of tree water use from sap flux density measured in the outer sapwood. This study was conducted in an 18-year-old loblolly pine plantation in central Louisiana in 1999. The results revealed that SFD was higher in the outer xylem than in the inner xylem and large trees had higher SFD than small trees. Thinning increased daily …

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Thermal Rheological Analysis Of Cure Process Of Epoxy Prepreg, Liangfeng Sun Jan 2002

Thermal Rheological Analysis Of Cure Process Of Epoxy Prepreg, Liangfeng Sun

LSU Doctoral Dissertations

The cure process of epoxy prepreg used as composite pipe joints was studied by means of differential scanning calorimetry (DSC), Bohlin Rheometer and other techniques. Isothermal DSC measurements were conducted between 110 and 220 oC, at 10 oC intervals. The results show that the complete cure reaction could be achieved at oC. The isothermal cure process was simulated with the four-parameter autocatalytic model. Except in the late stage of cure reaction, the model agrees well with the experimental data, especially at high temperatures. To account for the effect of diffusion on the cure rate, a diffusion factor was introduced into …

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Markov Models To Estimate And Describe Survival Time And Experience In Cohorts With High Euthanasia Frequency, Giselle Louise Hosgood Jan 2002

Markov Models To Estimate And Describe Survival Time And Experience In Cohorts With High Euthanasia Frequency, Giselle Louise Hosgood

LSU Doctoral Dissertations

Unique to survival analysis of veterinary clinical data is classification of observations from euthanized animals. The first study highlighted limitations of Kaplan-Meier product limit analysis (KM) of veterinary clinical data. Three data sets with different outcome proportions (alive, lost-to-follow-up, dead due to disease, dead due to other, euthanized due to disease, euthanized due to other) were used. Different classifications of observations from euthanized animals caused inconsistent conclusions of significant differences between strata within data sets. At times, ranking of median survival time estimates for strata was reversed. The KM was found inappropriate to evaluate observations from euthanized animals. This finding, …

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The Role Of Initial Coping Strategies On Subsequent Appointment Attendance In Individuals With Hiv: A Longitudinal Analysis, Deann Morris Johnson Jan 2002

The Role Of Initial Coping Strategies On Subsequent Appointment Attendance In Individuals With Hiv: A Longitudinal Analysis, Deann Morris Johnson

LSU Doctoral Dissertations

With advances in HIV treatment regimens, HIV has become a treatable chronic illness that requires extensive clinical management (Kelly, Otto-Salaj, Sikkema, Pinkerton, & Bloom, 1998). Nonadherence to HIV medical regimens is a primary reason for treatment failure. HIV medication regimens are complicated and require extensive time and effort from the patient (Friedland & Williams, 1999). Since the effectiveness of HIV medication regimens can be severely limited by poor adherence, much research has been conducted regarding the influence of psychosocial factors in adherence. However, this research has primarily focused on medication adherence and has not investigated psychosocial aspects associated with other …

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Cementitious Stabilization Of Soils In The Presence Of Sulfate, Lan Wang Jan 2002

Cementitious Stabilization Of Soils In The Presence Of Sulfate, Lan Wang

LSU Doctoral Dissertations

Winn Rock (anhydrite, CaSO4) comes from a quarry in Winn Parish in north Louisiana. Gravel from the quarry has been used extensively as a surface course on local parish and logging roads. Stabilization of these roads with Type I Portland cement followed by an overlay by asphaltic concrete sometimes resulted in heaving. The causes for heaving and possible solutions were investigated. In the laboratory 2" x 4" molds of Winn Rock containing soil were prepared and cured in water bath at 40°C, sealed plastic bag at room temperature, and air. Molds were prepared with 5% to 20% cementitious material. The …

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A Stylistic And Analytical Study Of Concerto No.2 For Piano And Orchestra, Op.33, By Lee Hoiby, Ji-Won Mun Jan 2002

A Stylistic And Analytical Study Of Concerto No.2 For Piano And Orchestra, Op.33, By Lee Hoiby, Ji-Won Mun

LSU Doctoral Dissertations

Lee Hoiby’s Concerto No. 2 for Piano and Orchestra, Op. 33, completed in 1980, is a welcome addition to the piano concerto repertory. The concerto was first performed June 6, 1980, in Chicago by Lee Hoiby with the American Chamber Symphony conducted by Robert Frisbie. This concerto contains the usual three movements and reflects many stylistic traits of late Romantic music. The purpose of this paper is to provide a stylistic and analytical examination of Lee Hoiby’s Concerto No. 2 for Piano and Orchestra, Op.33. The paper is organized into three chapters. The first chapter includes biographical information about Hoiby, …

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"Los Motz E.L So": Words Melody, And Their Interaction In The Songs Of Folquet De Marseille, Nancy Ellen Washer Jan 2002

"Los Motz E.L So": Words Melody, And Their Interaction In The Songs Of Folquet De Marseille, Nancy Ellen Washer

LSU Doctoral Dissertations

Although the poems of the troubadours have been extensively studied almost since they were first composed and the troubadours themselves indicate that they tried to create interactions between the melodies and the words, the melodies and the interactions between the poems and melodies in the complete songs have been examined much less intensively. In this dissertation I delve into the songs of the late twelfth-century troubadour Folquet de Marseille whose thirteen songs surviving with their melodies provide a varied collection of a suitable size to permit intensive analysis of poetic and musical compositional practices and the interactions between the two. …

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Adoption Of Best Management Practices In The Louisiana Dairy Industry, Noro C. Rahelizatovo Jan 2002

Adoption Of Best Management Practices In The Louisiana Dairy Industry, Noro C. Rahelizatovo

LSU Doctoral Dissertations

The traditional view of the agricultural community as a good steward of the environment has been challenged by increasing concerns about the complex relationship between agricultural production activities and environmental quality. Agriculture provides a large range of products to satisfy human needs. It has also been singled out as major source of water pollution. Largely improved surface water quality has been assessed in the U.S. since the enactment of the Clean Water Act. However, efforts to reduce water pollution continue, targeting discharges from identifiable sources of water pollution and diffused discharges from nonpoint sources. Agricultural producers are encouraged to voluntarily …

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The Works Of Manuel Quiroga: A Catalogue, Ana Luque Fernandez Jan 2002

The Works Of Manuel Quiroga: A Catalogue, Ana Luque Fernandez

LSU Doctoral Dissertations

Manuel Quiroga Losada (1892-1961), violinist, composer, and artist, was one of the foremost figures of the first half of the 20th century. This study tries to bring to light his musical legacy, a long overdue task. Until now, all attempts to rediscover the figure of Quiroga have centered mainly on his career as a violinist, his recordings or his paintings, however not on his compositions. This document is an inventory of the forty-four pieces for violin solo, violin and piano, and violin and orchestra written by Quiroga. Manuel Quiroga mainly wrote for the violin in the form of short pieces …

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Precursors For Copper Chemical Vapor Deposition, Muna Bufaroosha Jan 2002

Precursors For Copper Chemical Vapor Deposition, Muna Bufaroosha

LSU Doctoral Dissertations

The main objective of this study was to synthesize precursors that are capable of producing copper films of high quality by chemical vapor deposition (CVD). We investigated some copper(I) and copper(II) complexes as precursors for chemical or photochemical vapor deposition. In chapter 2, we synthesized a series of Cu(hfac)2(amine) adducts, where hfac- is hexafluoroacetylacetonate and the amines are: dimethylamine, isopropylamine, allylamine, pyrrolidine, and piperidine. The efficiency of these adducts compared to Cu(hfac)2(H2O) as Cu-CVD precursors was examined under hydrogen. We found that among these amine adducts, Cu(hfac)2(allylamine)2 gave the best …

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Neo-Onnagata: Professional Cross-Dressed Actors And Their Roles On The Contemporary Japanese Stage, William Hamilton Armstrong Iv Jan 2002

Neo-Onnagata: Professional Cross-Dressed Actors And Their Roles On The Contemporary Japanese Stage, William Hamilton Armstrong Iv

LSU Doctoral Dissertations

Neo-Onnagata: Professional Cross-dressed Actors and Their Roles on the Contemporary Japanese Stage explores the representation of male and female gender in the contemporary Japanese theatre. I particularly discuss a specialized subset of Japanese actor: the neo-onnagata, a contemporary theatre counterpart to Japan's highly stylized classical kabuki tradition of cross-dressed representation. This dissertation represents my attempt to provide these basic aims: to situate the contemporary Japanese cross-dresser in Japanese tradition, to show how cross-dressing acts as a sharp social commentary and mirror, and to introduce some little-represented cross-dressing actors of the contemporary Japanese stage to the academic community at large. In …

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Clear-Cutting Eden: Representations Of Nature In Southern Fiction, 1930-1950, Christopher B. Rieger Jan 2002

Clear-Cutting Eden: Representations Of Nature In Southern Fiction, 1930-1950, Christopher B. Rieger

LSU Doctoral Dissertations

This dissertation examines how Southern literary representations of the natural world were influenced by, and influenced, the historical, social, and ecological changes of the 1930s and 1940s. Specifically, I examine the ways that nature is conceived of and portrayed by four authors of this era: Erskine Caldwell, Marjorie Kinnan Rawlings, Zora Neale Hurston, and William Faulkner; through their works, I investigate the intersections of race, class, and gender with the natural environment. I argue that during this time of profound regional and national upheaval there exists a climate of professed binary oppositions and that these authors’ representations of nature in …

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Essays On Endowment Fund Management, Kurtay N. Ogunc Jan 2002

Essays On Endowment Fund Management, Kurtay N. Ogunc

LSU Doctoral Dissertations

The debate around the perpetual nature of endowment funds from the perspective of current versus future obligations is a major problem that I would like to address in two ways: (i) a macro-level treatment of the simultaneous asset allocation and spending rate with subsistence levels (analogous to the habit formation concept); and (ii) a micro-level analysis of one part of the endowment portfolio with a particular emphasis on the currency hedging decision. The purpose of the third chapter is to illustrate the significance of joint determination of appropriate asset allocation and spending rate decisions, and to describe the behavior of …

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Motivational Processes And Performance: The Role Of Global And Facet Personality Traits, James Haven Martin Jan 2002

Motivational Processes And Performance: The Role Of Global And Facet Personality Traits, James Haven Martin

LSU Doctoral Dissertations

The conscientiousness and neuroticism dimensions of the Five Factor Model (FFM) have been shown to be predictive of performance (Barrick & Mount, 1991; Paunonen & Ashton, 2001). This research examined three relatively unexplored issues, including (a) the impact of conscientiousness and neuroticism on motivational processes and performance; (b) the criterion-related validity of facet measures of conscientiousness and neuroticism as predictors of motivation and performance; and (c) whether conscientiousness, neuroticism, and their facets impact changes in motivational processes between performance episodes. Undergraduate psychology students (N = 220) completed measures of self-set goals and self-efficacy beliefs on two occasions, prior to the …

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Three-Dimensional Micromachined On-Chip Inductors For High Frequency Applications, Nimit Chomnawang Jan 2002

Three-Dimensional Micromachined On-Chip Inductors For High Frequency Applications, Nimit Chomnawang

LSU Doctoral Dissertations

Demands for wireless communication are ever-escalating for consumer and military communication applications. The requirements of portability, more functionality and lower cost have been driving forces toward smaller, more sophisticated and flexible wireless devices with lower power consumption. To meet these requirements, monolithically integrated passive inductors with high Q-factors and high self-resonant frequencies are desirable. Q-factor and self-resonant frequency of an inductor are significantly degraded at high frequencies due to conductor ohmic loss, magnetically induced eddy current in the conductive substrate, and lower self-resonant frequency from capacitance between conductive substrate and conductors.
In this dissertation, novel three-dimensional arch-like solenoid and dome-shaped …

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Use Of Actigraphy To Objectively Measure Motor Restlessness In Restless Legs Syndrome, Tai Anderson Istre Jan 2002

Use Of Actigraphy To Objectively Measure Motor Restlessness In Restless Legs Syndrome, Tai Anderson Istre

LSU Doctoral Dissertations

Restless Legs Syndrome (RLS) is a disorder characterized by disagreeable leg sensations, usually prior to sleep onset, which cause an almost irresistible urge to move the legs. A characteristic feature of this disorder is that the movements are partially or completely relieved with leg motions. Attempts to find the underlying pathology have been unsuccessful. Thus, there are no objective physiological tests to diagnose this condition. Using the Suggested Immobilization Test (SIT), the current study attempted to validate a new and practical method for quantifying the motor symptoms of RLS, actigraphy. To this end, the SIT with actigraphy was evaluated for …

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A Monotone Follower Control Problem With A Nonconvex Functional And Some Related Problems, Jamiiru Luttamaguzi Jan 2002

A Monotone Follower Control Problem With A Nonconvex Functional And Some Related Problems, Jamiiru Luttamaguzi

LSU Doctoral Dissertations

A generalized one-dimensional monotone follower control problem with a nonconvex functional is considered. The controls are assumed to be nonnegative progressively measurable processes. The verification theorem for this problem is presented. A specific monotone follower control problem with a nonconvex functional is then considered in which the diffusion term is constant. The optimal control for this problem, which is explicitly given, can be viewed as tracking a standard Wiener process by a non anticipating process starting at 0. For some parameters values, the value function for this monotone follower control problem is shown to be C2 and for other …

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On The Stabilization And Regularization Of Rational Approximation Schemes For Semigroups, Simone Flory Jan 2002

On The Stabilization And Regularization Of Rational Approximation Schemes For Semigroups, Simone Flory

LSU Doctoral Dissertations

In this work we discuss consistency, stability and convergence of rational approximation methods for strongly continuous semigroups on Banach spaces. The Lax-Chernoff theorem shows that in this setting consistency and stability assumptions are necessary to obtain strong uniform convergence of approximation methods. We investigate rational approximation methods for strongly continuous semigroups and their consistency properties, with special emphasis on A-stable methods and Padé-type approximations. In particular, we discuss the stability and convergence properties of these schemes, including the stability of the well-known and widely used Backward-Euler and Crank-Nicolson Schemes. Furthermore, we modify stabilization techniques developed by Hansbo, Larsson, Luskin, Rannacher, …

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Constructing Womanhood In Public: Progressive White Women In A New South, Mary Jane Smith Jan 2002

Constructing Womanhood In Public: Progressive White Women In A New South, Mary Jane Smith

LSU Doctoral Dissertations

During the Progressive Era, southern white women were aggressively recruited by the leadership of the Woman's Christian Temperance Union, the General Federation of Women's Clubs and the National American Woman Suffrage Association. Each believed the inclusion of southern white women vital to its success as a national association of American women; consequently, by the beginning of the twentieth century, southern white women had achieved positions of leadership in each organization. This dissertation analyzes, primarily through the public statements of the leaders of these groups, how these women defined themselves as women, as white, and as southern vis a vis their …

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