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Tobacco Farming In The Age Of The Surgeon General's Warning: The Cultural Ecology And Structuration Of Burley Tobacco Production In Madison County, North Carolina., Catherine Marie Algeo Jan 1998

Tobacco Farming In The Age Of The Surgeon General's Warning: The Cultural Ecology And Structuration Of Burley Tobacco Production In Madison County, North Carolina., Catherine Marie Algeo

LSU Historical Dissertations and Theses

This study analyzes the transformation of burley tobacco farming underway in the late twentieth century in light of social, political, and economic forces that make tobacco a contested crop. It focuses on one county in southern Appalachia, Madison County, North Carolina, where tobacco has been a cash crop for over a hundred years. A synthesis of the theoretical and methodological approaches of cultural ecology and structuration is proposed as a means of exploring the components of agricultural change within Appalachia at a continuum of scales from the local to the national, while contextualizing farming within its environmental and social settings. …


Dynamics And Management Of Insecticide Resistance In The Horn Fly, Haematobia Irritans Irritans (L.) (Diptera: Muscidae)., Antonio Thadeu Medeiros De Barros Jan 1998

Dynamics And Management Of Insecticide Resistance In The Horn Fly, Haematobia Irritans Irritans (L.) (Diptera: Muscidae)., Antonio Thadeu Medeiros De Barros

LSU Historical Dissertations and Theses

Studies on resistance of the horn fly, Haematobia irritans irritans (L.), to insecticides were conducted in Louisiana from 1989 to 1998. These studies included monitoring resistance and resistance dynamics under different strategies of insecticide use, monitoring the efficacy of insecticide products, establishing a relationship between bioassay findings and product efficacy, and evaluation of a new insecticide class. In four years (1989--1992), efficacy of 20% diazinon-impregnated car tags used yearly was reduced from greater than twenty to just one week of control, and tag failure was observed with resistance ratios (RR) from 1.8 to 5.7. Diazinon resistance developed more slowly and …


Granular Activated Carbon From Agricultural By-Products: Carbon Properties And Their Relationship To Sugar Decolorization Potential., Mohamed Ahmedna Jan 1998

Granular Activated Carbon From Agricultural By-Products: Carbon Properties And Their Relationship To Sugar Decolorization Potential., Mohamed Ahmedna

LSU Historical Dissertations and Theses

Representative samples of soft, low density, group 1 (rice straw, rice hulls, sugarcane bagasse) and hard, high density, group 2 agricultural by-products (pecan shells) were converted into granular activated carbons (GACs). Prior to pyrolysis, group 1 by-products were mixed with four binders, sugarcane molasses, sugar beet molasses, corn syrup and coal tar. GACs were produced from group 1 and 2 materials by physical activation (carbon dioxide, steam) or from group 2 materials by chemical activation (phosphoric acid). Carbons were evaluated for their physical (hardness, bulk density), chemical (ash, pH), surface (total surface area, pore size distribution, surface oxides) and adsorption …


Directed Search In K-System Reconstruction., Christopher W. Branton Jan 1998

Directed Search In K-System Reconstruction., Christopher W. Branton

LSU Historical Dissertations and Theses

K-systems analysis is a factor analysis technique created through the generalization of key reconstructability analysis definitions and algorithms. The method is applied to functions on systems of discrete variables to discover a set of factors which can explain the bulk of the function's variation from the mean. K-systems analysis uses principles of information theory to reveal interactions which are often masked by the assumptions implicit in traditional methods. The method has been used successfully to analyze systems in several disciplines. Despite the success of k-systems analysis, obstacles to the creation of a mature methodology still exist. Some issues and open …


A Cross-Site Inquiry Into Reading Instruction In Differentially Successful Title I Schools., Gypsye Dugas Bryan Jan 1998

A Cross-Site Inquiry Into Reading Instruction In Differentially Successful Title I Schools., Gypsye Dugas Bryan

LSU Historical Dissertations and Theses

By design, elementary schools are places where students perform specified tasks and become literate. In practice, elementary schools enroll students who engage in instructional activity, yet many of these students fail to reach minimum literacy standards. This multiple-case qualitative inquiry focused on the inner workings of schools where students placed at risk learned to read and examined schools where similar students did not learn to read. Research conducted in four elementary schools addressed the following questions: (a) What resources, time factors, and management systems do elementary teachers use to create an effective reading environment? (b) How do reading assessment measures …


An Exploratory Study Of The Impact Of Hypermedia-Based Approach And Science-In-Fiction Approach For Instruction On The Polymerase Chain Reaction., Lynda A. Britton Jan 1998

An Exploratory Study Of The Impact Of Hypermedia-Based Approach And Science-In-Fiction Approach For Instruction On The Polymerase Chain Reaction., Lynda A. Britton

LSU Historical Dissertations and Theses

Exploration of meaningful learning of the polymerase chain reaction (PCR) followed instruction by a researcher-developed hypermedia computer program that incorporated human constructivist principles and a "science-in-fiction" chapter of a novel that described PCR. Human constructivism is the Ausubel-Novak-Gowin (1997) meaningful learning theory that supports science learning through graphic representations and multiple examples. Science-in-fiction is a new genre of fiction introduced by the prominent scientist, Carl Djerassi, to engender an appreciation for science, and its ethical dilemmas. Chapter 19 of Djerassi's 1994 novel, The Bourbaki Gambit, was placed into hypermedia format to standardize the presentation. As part of a clinical microbiology …


Three-Dimensional Parallel Finite Element Simulation Of Natural Gas Flow In A Porous Media., James David Callahan Jan 1998

Three-Dimensional Parallel Finite Element Simulation Of Natural Gas Flow In A Porous Media., James David Callahan

LSU Historical Dissertations and Theses

A parallel-three-dimensional finite element simulation of natural gas flow in a porous media was developed for use in multiple well reservoirs. Developed with this simulation was a set of graphical applications to provide a geometric description of the reservoir, viewing of the generated mesh and viewing of results generated by the simulation. An adaptive mesh scheme for the dynamic refinement and derefinement of the mesh during the solution process is presented. The adaptive mesh scheme utilizes a mesh storage technique designed to reduce the space requirements of the mesh. This adaptive mesh technique was applied to an unstructured mesh. A …


Quantifying Sustainability In Aquaculture Production., Rex Hall Caffey Jan 1998

Quantifying Sustainability In Aquaculture Production., Rex Hall Caffey

LSU Historical Dissertations and Theses

Despite increasing institutional focus in aquaculture, sustainability remains an amorphous and much debated concept. Little consensus has been identified on the issue beyond the general recognition that the concept should contain environmental, economic, and sociological considerations. This study addressed the specific, relevant question of whether politically diverse aquacuiture interests can collectively develop and agree on production-level goals and indicators of aquaculture sustainability. The research partitioned sustainability into its three subcategories: environmental, economic and social. This division facilitated the use of existing conventions of measurement and expression in each subcategory. Employing a modified Delphi technique, over 100 aquaculture stakeholders in the …


The Relationship Of Social Skills To Psychopathology For Individuals With Mild And Moderate Mental Retardation., Stephen Joseph Anderson Jan 1998

The Relationship Of Social Skills To Psychopathology For Individuals With Mild And Moderate Mental Retardation., Stephen Joseph Anderson

LSU Historical Dissertations and Theses

Recent advances in the field of mental retardation have included the development of instruments for assessment of both psychopathology and social skills in individuals with mental retardation. Researchers have subsequently begun investigating relationships between psychopathology and social skills in individuals with mental retardation. Initial studies have focused on persons with severe and profound mental retardation. The present study examined the relationship between psychopathology and social skills in individuals with mild and moderate mental retardation. This investigation used the Assessment for Dual Diagnosis (ADD) to measure psychopathology and the Social Performance Survey Schedule (SPSS) to evaluate social skills. Significant differences were …


Techniques For Resolving Incomplete Systems In K-Systems Analysis., Gary J. Asmus Jan 1998

Techniques For Resolving Incomplete Systems In K-Systems Analysis., Gary J. Asmus

LSU Historical Dissertations and Theses

K-systems analysis is a generalization of reconstructability analysis (RA), where any general, complete multivariate system (g-system) can be transformed into an isomorphic, dimensionless system (a K-system) that has sufficient properties to be analyzed using probabilistic RA algorithms. In particular, a g-system consists of a set of states formed from a complete combination of the variables assigned specific values from a finite set of possible values and an associated system function value. The g-system must be complete in that all possible states must have an associated system function value. K-systems analysis has been applied to a variety of systems, but many …


M1 Strength Distributions In Deformed Nuclei., Thomas Georg Beuschel Jan 1998

M1 Strength Distributions In Deformed Nuclei., Thomas Georg Beuschel

LSU Historical Dissertations and Theses

The Elliott SU(3) Model, extended via pseudo-spin for heavy nuclei, is used to study low-lying magnetic dipole excitations in deformed nuclei which axe known as "scissors" modes. Proton and neutron degrees of freedom are handled explicitly and a system Hamiltonian that preserves SU(3) symmetry and one that includes single particle energies as well as quadrupole-quadrupole and pairing two-body interactions are considered. Starting from a basic nuclear Hamiltonian that preserves SU(3) symmetry, a microscopic interpretation of the "scissors" mode of the Two Rotor Model is realized through a linear mapping between invariants of the rotor group and SU(3). The model allows …


A Survey Of Selected Solo Organ Works Of Calvin Hampton., Margaret Richard Campo Jan 1998

A Survey Of Selected Solo Organ Works Of Calvin Hampton., Margaret Richard Campo

LSU Historical Dissertations and Theses

Calvin Hampton (1938--1984), American composer and organist, produced an impressive repertoire of organ works in his short life. In the period between 1973--1983, he composed eleven major organ works. In addition to writing for the organ, he composed vocal, chamber and orchestral works for varied instruments. The purpose of this monograph is to provide the first extended study of Hampton's solo organ works, focusing on his compositional style, which embodies the traditions of the German and French schools. Classical forms provide the framework of his organ works while the contrapuntal devices of the Baroque shape the textures. These features, combined …


Internal Defect Detection In Hardwood Logs With Fast Magnetic Resonance Imaging., Eyler Robert Coates Jr Jan 1998

Internal Defect Detection In Hardwood Logs With Fast Magnetic Resonance Imaging., Eyler Robert Coates Jr

LSU Historical Dissertations and Theses

Identification of defects such as knots in logs before the cutting operation would allow lumber mills to maximize the value of lumber from each log. This dissertation presented images obtained from scanning an oak log with magnetic resonance imaging (MRI). The unique characteristics of MRI images of hardwood logs were noted and were used to derive a quick algorithm to isolate defects. Defect regions had some pixels that varied considerably in intensity from their neighborhood, providing a seed for initiating the defect region. There was an overlap between the pixel gray level of the defects and clear wood. Therefore, traditional …


Public High School Restructuring/Reform Efforts In Louisiana., Martha Diane Shuckrow Cook Jan 1998

Public High School Restructuring/Reform Efforts In Louisiana., Martha Diane Shuckrow Cook

LSU Historical Dissertations and Theses

The purpose of this study was to investigate the restructuring/reform efforts in Louisiana public schools. The population for this study was defined as Louisiana public school principals who were employed for the year 1997--1998 in schools that contain at least grades 10, 11, and 12, but are not classified as alternative schools. The Louisiana High School Coaches Association Constitution and Directory (1997--98) and the Louisiana School Directory (1997--98) (Bulletin 1462) published by the Louisiana Department of Education provided the frame for the study. A simple random sample, with replacement, of principals from Louisiana public high schools participated in the study. …


Advances In The Chemistry Of Fullerene Fragments., Mark D. Clayton Jan 1998

Advances In The Chemistry Of Fullerene Fragments., Mark D. Clayton

LSU Historical Dissertations and Theses

This dissertation deals with the synthesis and characterization of novel intermediate target molecules that when placed under pyrolytic conditions, yield polynuclear aromatic hydrocarbons that can be identified on the surface of buckminsterfullerene. It also presents some direct applications that have developed from some significant synthetic improvements of key intermediates required for production of novel fullerene fragments. Chapter one presents the synthetic routes used to prepare C32H 12 and attempts toward synthesizing C40H14 and C46H20. The novel C32H12 is only the second known fullerene fragment that contains more than thirty carbon atoms. It is successfully produced by flash vacuum pyrolysis by …


Perception-Action Coupling During Goal-Directed Locomotion Without Vision., Robert D. Clark Jan 1998

Perception-Action Coupling During Goal-Directed Locomotion Without Vision., Robert D. Clark

LSU Historical Dissertations and Theses

The ability to walk to distant targets accurately without the use of vision has been demonstrated in a number of studies (e.g., Elliott, 1987; 1990; Loomis, Da Silva, Philbeck, & Fukusima, 1996; Rieser, Ashmead, Talor, & Youngquist, 1990; Steenhuis & Goodale 1988; Thomson, 1983). Processes underlying the mechanisms involved in this ability however, are not completely understood. One possible mechanism examined involves non-visual sensory flows during locomotion. In Experiment 1, manipulations to normal walking led to significant increases in error relative to the control group. Error expressed as a percentage of target distance revealed that target distance did not affect …


An Examination Of Automatic Versus Strategic Semantic Priming Effects In Broca's Aphasia., Janice Feagin Del Toro Jan 1998

An Examination Of Automatic Versus Strategic Semantic Priming Effects In Broca's Aphasia., Janice Feagin Del Toro

LSU Historical Dissertations and Theses

The ability to recognize words is frequently investigated using a lexical decision (LD) priming task in which subjects make rapid yes/no judgements as to whether visually presented letter strings (targets) are words or not. A well established finding is that words are recognized faster when preceded by related words. This "semantic priming effect" is believed to represent both automatic and conscious, strategic driven processes. One factor that influences the degree to which subjects recognize words automatically or consciously, is the time interval between the presentation of the prime and the presentation of the target. This is referred to as the …


Spatial Variability Of Coastal Organic Soil Characteristics., L. Cecil Dharmasri Jan 1998

Spatial Variability Of Coastal Organic Soil Characteristics., L. Cecil Dharmasri

LSU Historical Dissertations and Theses

This dissertation is a part of the Louisiana NASA/EPSCoR (Experimental Program to Stimulate Competitive Research) global change research, which studied the fate of carbon and sediments within the Barataria Bay Basin, Louisiana. It studied water composition to assess seawater influence within the marsh. Ion exchange resin strips were used to study the effect of salinity and Chloride (Cl) on sulfate (SO4) reduction and their potential for water and soil analysis. Chloride dominated the water system and the Cl/SO 4 ratio can be used to assess the seawater influence. Resin extractable sulfur (S) predicted non-pyritic S fraction for the marsh soils. …


Using Scaffolded Interaction To Improve Lld Readers' Inferencing And Narrative Abilities., Kathryn Patrice Dekemel Jan 1998

Using Scaffolded Interaction To Improve Lld Readers' Inferencing And Narrative Abilities., Kathryn Patrice Dekemel

LSU Historical Dissertations and Theses

A time series control group study was completed to investigate the efficacy of Communicative Reading Strategies (CRS) as an instructional approach for improving the oral reading, question answering, and narrative retelling abilities of LLD students. The participants were 10 LLD students who ranged in age from 9 to 12 years and 5 reading-age matched (RAM) peers who ranged in age from 7 to 9 years. Five of the LLD subjects were randomly assigned to a treatment group (TLD), while the remaining 5 LLD subjects were assigned to a no-treatment group (NLD). All three groups participated in a series of probes …


A Study Of Pore Fluids And Barite Deposits From Hydrocarbon Seeps: Deepwater Gulf Of Mexico., Baoshun Fu Jan 1998

A Study Of Pore Fluids And Barite Deposits From Hydrocarbon Seeps: Deepwater Gulf Of Mexico., Baoshun Fu

LSU Historical Dissertations and Theses

The primary goals of this research were to (i) determine the factors controlling the chemical compositions of pore fluids in hydrocarbon seep sediments of the Gulf of Mexico, and (ii) delineate the nature, age and origin of barite deposits associated with seeps. Three types of pore fluids from seeps have been discerned: (i) sediment-trapped seawater; (ii) brines derived by seawater dissolution of subsurface salt diapirs; and (iii) deep-seated formation waters enriched in Ba and Ra. The Ra-enriched formation waters advecting to the seafloor may explain why 226Ra levels in the Gulf of Mexico water column are higher than in the …


A Review Of The North American Squalodontidae (Mammalia, Cetacea)., Alton Cline Dooley Jr Jan 1998

A Review Of The North American Squalodontidae (Mammalia, Cetacea)., Alton Cline Dooley Jr

LSU Historical Dissertations and Theses

All available North American specimens of squalodont whales were examined to determine species assignments, and to determine functional aspects and ecological implications. Only two existing species of the 17 referred to Squalodontidae from North America are members of that family, Squalodon atlanticus and Squalodon calvertensis. Of these two species, only S. calvertensis is based on adequate material for consideration as a valid species. Squalodon calvertensis is redescribed, based on the material which has been collected since 1923. These specimens indicate that the species is found from New Jersey to North Carolina, in the Miocene Kirkwood, Calvert, and Pungo River Formations. …


Subterranean Echoes: Curriculum Theory As Cultural Studies., Toby Allan Daspit Jan 1998

Subterranean Echoes: Curriculum Theory As Cultural Studies., Toby Allan Daspit

LSU Historical Dissertations and Theses

Cultural studies has emerged in recent decades as a popular realm of academic inquiry (During, 1993). Giroux (1994), while noting the field's increased acceptance, ponders why cultural studies has yet to permeate critical analyses of education and simultaneously questions cultural studies' reticence in considering schools as an important site of cultural production. Edgerton (1996) concurs with Giroux and notes that cultural studies' use in colleges of education is extremely rare. The realm of popular culture, one of the central foci of cultural studies, has especially been marginalized in academic discourses. My project is to explore the implications of curriculum theory …


Computer-Assisted Instruction: Enhancements For Language-Learning Applications., William Lawrence Harrell Jr Jan 1998

Computer-Assisted Instruction: Enhancements For Language-Learning Applications., William Lawrence Harrell Jr

LSU Historical Dissertations and Theses

Presently, computer-assisted instruction is in use in many educational venues. Unfortunately, the application of computer-assisted language learning at a distance has virtually been ignored. This is an opportunity that needs to be explored. In order to do so, a number of considerations must be attended to. First, effective monitor display design is critical for the optimal presentation of distance learning material. Second, gender and equity factors that impact computer use must be understood to minimize the detrimental effects they might have on computer-assisted distance learning. Third, the needs of students involved with the particularly-demanding application of distance learning principles of …


A Brief Method For Evaluating The Effects Of Stimulant Medication And Behavioral Interventions On The Classroom Performance Of Children With Attention Deficit Hyperactivity Disorder (Adhd)., Veronica Schilling Gulley Jan 1998

A Brief Method For Evaluating The Effects Of Stimulant Medication And Behavioral Interventions On The Classroom Performance Of Children With Attention Deficit Hyperactivity Disorder (Adhd)., Veronica Schilling Gulley

LSU Historical Dissertations and Theses

This study examined the separate and combined effects of varying dosages of methylphenidate (MPH) and behavioral interventions of varying strengths on the disruptive behavior and academic performance of 5 students with attention deficit hyperactivity disorder (ADHD). Overall results indicated the behavioral interventions at some level were comparable to previously prescribed dosages of MPH for decreasing disruptive classroom behavior for 4 of 5 participants. However, the "strength" of behavioral intervention necessary to achieve maximum improvements was idiosyncratic. For a fifth participant, results indicated that MPH was not necessary. Results also demonstrated that the combination of the behavioral interventions at some level …


A Comparative Study Of Communication Intervention For Nonverbal Children With Autism., Kelly C. Higgins Jan 1998

A Comparative Study Of Communication Intervention For Nonverbal Children With Autism., Kelly C. Higgins

LSU Historical Dissertations and Theses

Communication intervention for 3 nonverbal children with autism was compared in an alternating treatment design. Subjects were three males, ages 4--7, 3--6, and 3--5 who met diagnostic criteria for Autism and who were considered to be nonverbal according to developmental history, parent/teacher report and behavioral observation. Alternating treatment conditions included the established treatment format that each subject was receiving in his school setting (Treatment A) and a developmentally-integrated format of intervention structured to facilitate integrated cognitive, social and communicative development (Treatment B). Each intervention was characterized according to profiles of Traditional-Behavioral or Semantic Pragmatic-Developmental intervention formats. Characteristics of adult interaction …


Influence Of Diet And Genetic Strain On Desirable Flavors In Farm-Raised Catfish., Carol Ann Kelly Jan 1998

Influence Of Diet And Genetic Strain On Desirable Flavors In Farm-Raised Catfish., Carol Ann Kelly

LSU Historical Dissertations and Theses

This farm-raised catfish quality study measured desirable flavor attributes, Chickeny, Nutty, Fat Complex, Corn, Sweet, with the objective to determine effects of feed ingredients, time-on-diet and genetic strain. Overall flavor impact differences were tested by triangle tests. The diets were Casein-base reference feed by itself or partially substituted with: 10% catfish meal, 10% meat and bone meal, 10% rice bran, or 3% menhaden oil and commercial feed formulation. Fish were grown indoors to minimize environmental flavors for 70, 160, 210 and 318 days. The genetic strains evaluated were channel, albino channel, blue, hybrid channel x blue, and black bullhead catfish. …


Analog Functional Assessment In General Education Settings., James Alfred Levelle Jan 1998

Analog Functional Assessment In General Education Settings., James Alfred Levelle

LSU Historical Dissertations and Theses

Persistent disruptive behaviors in school classrooms often result in referrals for behavior intervention services. Although research has supported several intervention strategies, limited research has focused on linking assessment to the selection of specific strategies. Experimental analysis procedures for assessing the function of behavior have been successful in the selection of specific strategies with developmentally disabled students and in special education environments. However, research in general education settings has been sparse. In this study, an analog functional assessment approach utilizing experimental analysis procedures was conducted to assess the function of off-task behaviors in regular education settings. Conditions were established in each …


Autobiographical Memory In Mild And Moderate Dementia Of The Alzheimer's Type., Judith Parks Levy Jan 1998

Autobiographical Memory In Mild And Moderate Dementia Of The Alzheimer's Type., Judith Parks Levy

LSU Historical Dissertations and Theses

Alzheimer's disease (AD) is a progressive disease that particularly affects memory with difficulties starting insidiously and gradually progressing. Anterograde amnesia for semantic and episodic types of declarative knowledge becomes the most prominent and disproportionately impaired cognitive symptom. By the middle stages of the disease, this memory loss progresses to severe impairment. The neuropathology of early AD involves the hippocampal complex, which is involved in new learning and storage of recent experiences. As the disease progresses, it involves neocortical areas, which are involved in the storage of more remote memories. Participants, including minimal stage AD, mild stage AD, moderate stage AD, …


Autobiography From St. Augustine To David Antin: Examining The Construction Of The Self As Mutually Reflective Of Cultural Developments In Science And Technology, Art, And Literary Theory., Jessica Lynn Faust Jan 1998

Autobiography From St. Augustine To David Antin: Examining The Construction Of The Self As Mutually Reflective Of Cultural Developments In Science And Technology, Art, And Literary Theory., Jessica Lynn Faust

LSU Historical Dissertations and Theses

In this study, I look at the mutually reflective changes in society and autobiography in works definitive for their various periods: Augustine's The Confessions from antiquity; Rousseau's The Confessions from the eighteenth century; the autobiographical writings of Gertrude Stein, from the modernist period; and, most importantly here, the focus on the development of David Antin's work as representative of both postmodernism and current culture. Specifically, I consider the construction of the self in respect to art, literary theory, memory research, and science and technology. During the second half of the twentieth century, computers have permeated almost every facet of society. …


The Effects Of Autocorrelation In The Estimation Of Process Capability Indices., Lawrence Lee Magee Jan 1998

The Effects Of Autocorrelation In The Estimation Of Process Capability Indices., Lawrence Lee Magee

LSU Historical Dissertations and Theses

The current popularity of the process capability index, a measure of a supplier's ability to meet the product specifications demanded by a customer, has become a matter of some controversy. While admitting the validity of much existing criticism, this research demonstrates that sample estimation of the triple index (Cpl, Cp, Cpu), a variant of the widely used index pair (Cp, Cpk), is equivalent to estimation of the natural parameters (mu, sigma) whenever the measured process characteristic X has an unconditional (marginal) normal probability density function. This includes processes which obey the strictly stationary, normal ARMA( p, q) model. By this …