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Real-Time Effective Stress Evaluation In Shales: Pore Pressure And Permeability Estimation., Jean-Louis Jerome Alixant Jan 1989

Real-Time Effective Stress Evaluation In Shales: Pore Pressure And Permeability Estimation., Jean-Louis Jerome Alixant

LSU Historical Dissertations and Theses

In this dissertation, a general method to determine the vertical effective stress in shales while drilling is developed. The concept is applied to the development of a model restricted to sodium smectitic shales, which are interpreted using Measurement-While-Drilling (MWD) resistivity data. Effective stress is introduced as the key parameter in the evaluation of petrophysical properties of shales, which provides a wide range of applications to the method. The model comprises two interpretation modules: an electrical module converts shale resistivity into porosity using a new formation factor relationship adapted from previous work, and a mechanical module relates porosity to void ratio …

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Constitutive Equations For Large Deformation, Rate-Dependent Plasticity For Metal Alloys., Louay Nadhim Mohammad Jan 1989

Constitutive Equations For Large Deformation, Rate-Dependent Plasticity For Metal Alloys., Louay Nadhim Mohammad

LSU Historical Dissertations and Theses

A system of constitutive equations is proposed that describes the viscoplastic behavior of a class of metal alloys when subjected to large deformations. The model is purely elastic before the plastic state is reached, and becomes elastic/viscoplastic after the plastic state has been exceeded. Three main assumptions are made with regard to the strain-rate dependency in the proposed formulation. The inelastic strain rate tensor is assumed to be normal to each point of the rate dependent convex yield surface. The initial yield stress obtained from uniaxial tests is assumed to be dependent on the rate of strain loading. Finally, the …

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Comparison Of Ascorbic Acid Content Of Super‐Market Versus Roadside Stand Produce, R. J. Bushway, P. R. Helper, J. King, B. Perkins, M. Krishnan Jan 1989

Comparison Of Ascorbic Acid Content Of Super‐Market Versus Roadside Stand Produce, R. J. Bushway, P. R. Helper, J. King, B. Perkins, M. Krishnan

Faculty Publications

Seven vegetables and one fruit from two roadside stands and two major local supermarkets were analyzed for their ascorbic acid content. Produce was sampled during a nine week period from late July through September of 1987. Significant differences at the 0.05 level for ascorbic acid were observed between supermarket and roadside stand produce for potato, cauliflower, cabbage and tomato while no significant differences were found between cantaloupe, broccoli, green peppers and spinach from either market. Cabbage was the only supermarket item that was significantly higher in ascorbic acid concentration. Very little dehydroascorbic acid was shown to be present in these …

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Factors Related To Turnover Intentions Of Louisiana Cooperative Extension Service Agents., Bonnie Carolyn Gaddis Carter Jan 1989

Factors Related To Turnover Intentions Of Louisiana Cooperative Extension Service Agents., Bonnie Carolyn Gaddis Carter

LSU Historical Dissertations and Theses

The purpose of this study was to expand the theoretical knowledge of the March and Simon (1958) "decision to participate" model as modified by Jackofsky (1982, 1984) and examined by Jackofsky and Peters (1983). Specifically, the study examined the relationship between employee turnover intentions and various predictors of turnover, including (a) desirability of movement (organizational commitment); (b) ease of movement; (c) the interaction of perceived desirability of movement (organizational commitment) and perceived ease of movement from the organization; (d) job satisfaction; (e) central life interest; and (f) selected employee demographic variables. Two-hundred forty Extension agents employed by Louisiana Cooperative Extension …

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An Evaluation Of Multiple Aspects Of Asthmatic Functioning: Stress Responders Versus Stress Nonresponders., Anthony Joseph Goreczny Jan 1989

An Evaluation Of Multiple Aspects Of Asthmatic Functioning: Stress Responders Versus Stress Nonresponders., Anthony Joseph Goreczny

LSU Historical Dissertations and Theses

The purpose of this study was to differentiate between asthmatics whose daily symptoms are related to daily stress level (stress responders) and those whose symptoms have no apparent relation to stress (stress nonresponders) and to indentify differences between the two groups. Using correlational procedures, 15 stress responders and 19 stress nonresponders were identified and compared along various dimensions. Multivariate analysis of variance (MANOVA) and covariance (MANCOVA) procedures revealed no significant differences between the two groups with respect to affective/emotional responding, clinical symptomatology, or cognitions about illness and asthma. In addition, regression models using the Asthma Symptom Checklist Panic-Fear subscale, a …

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Description And Meaning In Three Novels By Gustave Flaubert., Corrada Biazzo Curry Jan 1989

Description And Meaning In Three Novels By Gustave Flaubert., Corrada Biazzo Curry

LSU Historical Dissertations and Theses

This study focuses on the problematic of description and meaning in literature, based on three master-works by Gustave Flaubert: Madame Bovary, Salammbo, and L'Education sentimentale. Description generally tends to create digressions and gratuitous accumulations that can break the narrative development. However, in the classical realist text descriptive details are to represent a global image and be available to a possible interpretive recuperation which can be mimetic and establish the basic story line, or symbolic, that is, primarily connoting the themes of the novel or the characters' feelings. Using Flaubert's works as examples, this study analyzes the constant tensions of these …

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The Effect Of Personal Journals On Fourth-Grade Students' Attitudes Toward Reading And Writing., Nancy B. Cothern Jan 1989

The Effect Of Personal Journals On Fourth-Grade Students' Attitudes Toward Reading And Writing., Nancy B. Cothern

LSU Historical Dissertations and Theses

The purpose of this study was to investigate the relationship between belief systems and attitudes toward reading and writing and the effect of personal journal writing on those attitudes and beliefs. By combining three established areas of research (the affective component of attitude, the reading-writing relationship, and the self-defining nature of personal narrative), the use of personal journals was tested as an effective means for contributing to the development of positive attitudes. Subjects were 95 fourth graders enrolled in four intact classes which were randomly assigned to experimental or control conditions Pre-/post-assessments included administration of reading and writing attitude scales …

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Evaluation And Improvement Of Maintenance Scheduling Techniques., Nat Khemakavat Jan 1989

Evaluation And Improvement Of Maintenance Scheduling Techniques., Nat Khemakavat

LSU Historical Dissertations and Theses

The objective of this research is to evaluate present maintenance scheduling systems and to suggest improvements or alternatives. The widely used priority-based maintenance scheduling system is shown to be inappropriate in a variety of scheduling circumstances. The major reason is the omission of any type of cost consideration. To overcome this shortcoming, a new maintenance scheduling model is proposed. Instead of using work-order priority as the primary scheduling criteria, the new system uses cost as the key scheduling component. That is, maintenance jobs are scheduled with the objective of minimizing total maintenance cost. Maintenance scheduling strategies based on the cost …

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Age Level Differences In Children's Use Of An Aesthetic Stance When Responding To Literature., Joyce E. Many Jan 1989

Age Level Differences In Children's Use Of An Aesthetic Stance When Responding To Literature., Joyce E. Many

LSU Historical Dissertations and Theses

The primary purpose of this study was to explore the effects of the use of the aesthetic and efferent stances in response to literature. Subjects included 43 fourth graders, 47 sixth graders, and 40 eighth graders who were reading on-grade level or above. All subjects read the same three short stories, completed written free responses to each, and rated the stories. Responses were analyzed for reader stance, level of understanding reached, and the elements of the responses in terms of content categories. Two-way analysis of variances revealed significant main effects for stance and grade on the dependent variable, level of …

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Children's Ability To Utilize The Mnemonic Keyword Method: An Educational Application Within Fourth-Grade Classrooms., Nancy Lynn Williams Jan 1989

Children's Ability To Utilize The Mnemonic Keyword Method: An Educational Application Within Fourth-Grade Classrooms., Nancy Lynn Williams

LSU Historical Dissertations and Theses

Research has shown that the mnemonic keyword method is an effective study strategy under controlled laboratory-type situations with subjects learning decontextualized facts. Very few studies have actually tested the mnemonic keyword method within the context of a normal fourth grade classroom and learning situation. The purpose of this study, then, was to demonstrate the viability of the mnemonic keyword method as a study strategy when compared to notetaking/outlining, a common study strategy recommended by fourth grade curricula. The subjects were 106 fourth graders enrolled in four classes at a rural elementary school. Data were collected over a four week period …

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The Pious City: Social Welfare And The Christian Enlightenment In Eighteenth Century Modena. (Volumes I And Ii)., Susan Vandiver Nicassio Jan 1989

The Pious City: Social Welfare And The Christian Enlightenment In Eighteenth Century Modena. (Volumes I And Ii)., Susan Vandiver Nicassio

LSU Historical Dissertations and Theses

The dissertation examines reform in the enlightened state of Modena by looking at the opere pie, "pious works" which included dowries, health care, education and shelter for the poor. The Enlightenment is considered in a social and economic context, and social welfare is examined in terms of the familial, religious and civic piety which shaped these charities between 1690 and 1796. The study is constructed around the Araldi, a merchant family whose outstanding members (priests and physicians) rose rapidly in the Modenese administrative class during the eighteenth century. It examines the patronage network of the court and the university, and …

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Hegemonic Stability Theory: An Examination., Victor Edward Sachse Jan 1989

Hegemonic Stability Theory: An Examination., Victor Edward Sachse

LSU Historical Dissertations and Theses

Hegemonic stability theory been the focus of substantial scholarly attention in recent years. Hegomonic stability theory is a theory that attempt to explain changes in the degree to which the international political economy is "open" or "restricted" on the basis of the power relations between the major states in the world system. Specifically, the theory holds that markets will tend to be most open when one state is clearly predominant, particularly in terms of economic power, and conversely, that markets will tend to be restricted when there is no predominant power. From the end of World War II until the …

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Illness Behavior And The Preoperative Prediction Of Postoperative Pain In Cholecystectomy Patients., Lannis Lee Tynes Jr Jan 1989

Illness Behavior And The Preoperative Prediction Of Postoperative Pain In Cholecystectomy Patients., Lannis Lee Tynes Jr

LSU Historical Dissertations and Theses

Eighty (80) elective cholecystectomy patients volunteered to participate in the present study which assessed the relation between past illness behavior and the report of pain following surgery. A review of the literature indicated that demographic variables (e.g., sex, age) and general psychological variables (e.g. state anxiety) have been the subject of many studies attempting to predict postoperative pain, yet learning and behavioral factors such as past illness behavior and familial modelling of illness behavior have not. Preoperative assessments included the Illness Behavior Inventory (IBI; Turkat, 1983), the Familial Illness Behavior Inventory (IBI-F; derived from the IBI), the State Trait Anxiety …

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Queueing And Stability Analysis Of Buffered Csma/Cd Local Networks., Young Keun Yoon Jan 1989

Queueing And Stability Analysis Of Buffered Csma/Cd Local Networks., Young Keun Yoon

LSU Historical Dissertations and Theses

This dissertation develops a joint probability generating function for the message quene lengths in a slotted p-persistent CSMA/CD (Carrier-Sense Multiple-Access with Collision Detection) system with a finite population of buffered users. Each user is assumed to have an independent and identical process of packet generation and an infinite buffer for storing outstanding packets. A closed form formula is obtained for the generating function in case of a two user system. Analytic formulas for the stability condition of a p-persistent CSMA/CD system are derived using the generating function. The range of the transmission probability p that leads to stability is examined …

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Developmental Processes In Leader-Member Exchanges., Caroline Cooper Wilhelm Jan 1989

Developmental Processes In Leader-Member Exchanges., Caroline Cooper Wilhelm

LSU Historical Dissertations and Theses

The purpose of the present study was to specify more fully the sequence of events by which leader-member relationships are formed. A model of leader-member exchange (LMX) development originally proposed by Dienesch and Liden (1986) was expanded with findings from role theory, attribution theory, and equity theory, and a set of hypotheses was derived for testing. One hundred forty-two subordinates and their respective supervisors (n = 53) from four divisions of a large manufacturing organization provided data for the study. Questionnaires and cover letters assuring anonymity were distributed to subjects, and completed questionnaires were returned directly to the researcher by …

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The Lactate Threshold And Carbon Dioxide Flow To The Lung As Predictors Of Ventilation During Exercise., Becky Anne Baker Jan 1989

The Lactate Threshold And Carbon Dioxide Flow To The Lung As Predictors Of Ventilation During Exercise., Becky Anne Baker

LSU Historical Dissertations and Theses

Three studies were performed to determine the relationship between blood lactate, CO$\sb2$ flow to the lung, and ventilation during exercise. First, the method of determining the lactate threshold by use of log-log and semilog transformations developed by Beaver and his colleagues was modified to provide an objective method of determining the threshold which resulted in a significantly better fit (p $<$.05) of the log-log model to the data. Second, to test the theory that the increase in CO$\sb2$ flow to the lung due to bicarbonate buffering of H+ from lactic acid causes the rise in ventilation out of proportion to VO$\sb2$ at the ventilatory threshold, the lactate thresholds of these subjects were used to predict their ventilatory thresholds. The lactate threshold determined by the modified log-log model/method was a poor predictor with an insignificant relationship between the lactate and ventilatory thresholds (p $>$.05). In the third study, six subjects were tested during 4 sessions to determine the relationship between ventilation and CO$\sb2$ flow to the lung during exercise and also during rest and exercise while CO$\sb2$ was being inhaled. This relationship …

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The Relation Of Cognition, Emotion And Behavior To The Prediction Of Depressive Symptomatology In Referred And Nonreferred Adolescents., Tracy Lynn Cole Jan 1989

The Relation Of Cognition, Emotion And Behavior To The Prediction Of Depressive Symptomatology In Referred And Nonreferred Adolescents., Tracy Lynn Cole

LSU Historical Dissertations and Theses

Researchers have shown an increased interest in depression in children and adolescents in the last few years. As a result, a body of research exists which has focused on the cognitive and behavioral aspects of depression in children and adolescents. Few studies, however, have examined the relation of emotion to depression. Therefore, the purpose of this investigation was to examine the relation of cognition, emotion and behavior to depression. Eighty adolescents (nonreferred) from public schools in a southern city and seventy-three adolescents (emotionally disturbed) from a psychiatric facility in the same area participated in the study. Each adolescent completed self-report …

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An Empirical Analysis Of The Effects Of Quality Factors On The Price Of Rough Rice In Louisiana., John Frederick Denison Jan 1989

An Empirical Analysis Of The Effects Of Quality Factors On The Price Of Rough Rice In Louisiana., John Frederick Denison

LSU Historical Dissertations and Theses

This dissertation analyzes the effects of quality factors on prices paid producers for long and medium grain rough rice in Louisiana. Rough rice prices, and other information surrounding quality, were collected for the study for the 1986/87 and 1987/88 marketing years from the Louisiana Farm Bureau Marketing Association in Crowley, Louisiana. The relationship between the price of rough rice, and its quality attributes or characteristics, was analyzed in a hedonic price framework. A conceptual model for the Louisiana rough rice market was constructed, and estimated premiums and discounts reported for a set of quality factors believed to influence producer prices. …

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Effects Of Cocaine Use And Withdrawal On Clinical Memory And New Learning., Madeline Uddo-Crane Jan 1989

Effects Of Cocaine Use And Withdrawal On Clinical Memory And New Learning., Madeline Uddo-Crane

LSU Historical Dissertations and Theses

This project was conceptualized as an exploratory examination of the neuropsychological sequelae of cocaine abuse, specifically the drug's effect on new learning and memory. The experimental groups were composed of 30 veterans enrolled in a drug treatment program for cocaine abuse. This group was divided equally by route of administration, i.e., group one included 15 individuals whose preferred route of administration was intravenous injection; group two included 15 individuals whose preferred route of administration was smoking. The comparison group consisted of 15 individuals enlisted in the National Guard. The groups were essentially homogeneous, with a mean age of 34.6 ($SD$ …

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Modeling, Simulation, And Automatic Control For Optimum Drying And Storage Of Rough Rice In A Bin System., Jong Hoon Chung Jan 1989

Modeling, Simulation, And Automatic Control For Optimum Drying And Storage Of Rough Rice In A Bin System., Jong Hoon Chung

LSU Historical Dissertations and Theses

A study on modeling, simulation, and automatic control for optimum drying and storage of rough rice in a farm-bin system was conducted to address some aspects of rice post-harvest technology. Resistance-type moisture sensors and temperature and humidity sensors were evaluated for continuously monitoring the conditions of air and grain. Models to predict rice moisture models during drying and storage were developed. Based on accuracy and predictability, the use of the capacitance-type humidity sensor is recommended over the resistance-type moisture sensor. A pressure drop model of airflow through rough rice was developed to aid in determining the optimum size and type …

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Dangerousness: Risk Assessment For Violent Behavior., Charles Edward Shaffer Jr Jan 1989

Dangerousness: Risk Assessment For Violent Behavior., Charles Edward Shaffer Jr

LSU Historical Dissertations and Theses

Federal court decisions and state and federal legislation have made the legal concept of dangerousness the predominant criterion in involuntary mental health hospital commitments and in determining the least restrictive custody level in prison inmate custody assignments. However, no adequate consensual definition with empirical methods of measurement exists. Megargee's (1976) definition of dangerousness as the probability of violent behavior was used as the basis for an empirical approach to measuring dangerousness in this study. Recent studies in the literature (Monohan, 1984; Klassen & O'Conner, 1988) suggested that discriminant analysis might be an appropriate methodology for model development. Review of the …

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Cognitive And Affective Outcomes Of Varying Levels Of Structured Collaboration In A Computer-Based Learning Environment., Judith Lavine Repman Jan 1989

Cognitive And Affective Outcomes Of Varying Levels Of Structured Collaboration In A Computer-Based Learning Environment., Judith Lavine Repman

LSU Historical Dissertations and Theses

This study investigated cognitive and affective outcomes resulting from the use of varying levels of structured peer collaboration (unstructured, structured, and structured with training) in a computer-based learning environment. The study was designed to apply research findings showing a positive relationship between giving explanations and achievement into classroom practice. The sample consisted of 190 students enrolled in nine sections of seventh grade social studies at two middle schools in East Baton Rouge Parish, LA. The schools were selected because they contained large percentages of students at-risk of school failure. Intact classes were randomly assigned to receive one of the three …

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Molecular Biological Studies On The Degradation Of Diphenyl Ethers By Bacteria., Hung-Ming James Liaw Jan 1989

Molecular Biological Studies On The Degradation Of Diphenyl Ethers By Bacteria., Hung-Ming James Liaw

LSU Historical Dissertations and Theses

Microbial degradation of diphenyl ethers was studied utilizing several different approaches. The first approach was to isolate mutants from a ligninolytic Erwinia sp. by conventional mutagenesis and selection. A copper-resistant mutant, designated as Erwinia sp. CU3614, was isolated and characterized to be capable of degrading diphenyl ethers as well as one dibenzo-p-dioxin in the presence of copper ions. Isolation of Tn5 transposon-induced mutants of Erwinia sp. CU3614, which lost degradation ability, demonstrated that in all probability a copper-associated activity in the biotransformation of aromatic ethers was involved. In order to study the degradation at the molecular biological level, a 2.1 …

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The Macroeconomics Of Presidential Popularity., Susan Katherine Washburn Jan 1989

The Macroeconomics Of Presidential Popularity., Susan Katherine Washburn

LSU Historical Dissertations and Theses

This thesis examines several issues dealing with the public's social preference function between inflation and unemployment. First, the preference function is estimated as a nonlinear function. Second, the thesis analyzes the ability of a presidential administration to improve its popularity level by exploiting a short-run Phillips curve. Finally, preference functions disaggregated by sex, race, political party, and geographical region are estimated. Presidential approval levels are proxied by monthly Gallup Poll approval data. Chapter One serves as an overview of the current body of literature. While theoretical analyses of macroeconomic policy have traditionally assumed that the public's social preference function is …

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To Be West Indian: Autobiography And West Indian Literature., Margaret Kent Bass Jan 1989

To Be West Indian: Autobiography And West Indian Literature., Margaret Kent Bass

LSU Historical Dissertations and Theses

Although some critics claim that autobiography is not a West Indian literary mode, I maintain that autobiography, of a special West Indian variety, is necessarily present, for it provides a way of defining the self and bringing the parts of the self together into a unified and coherent whole. Autobiography is the genre that oppressed and colonized populations have traditionally used to write themselves into history and to proclaim their humanity to the world. The writing of autobiography is essential to the process of decolonization, for the colonized must define themselves and recreate themselves in their own images thereby resisting …

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An Anisotropic Finite Plasticity Model For Continuum Damage Mechanics., Peter Issa Kattan Jan 1989

An Anisotropic Finite Plasticity Model For Continuum Damage Mechanics., Peter Issa Kattan

LSU Historical Dissertations and Theses

A constitutive model is formulated for anisotropic continuum damage mechanics using first elasticity and then finite strain plasticity. The formulation is given in spatial coordinates (Eulerian reference frame) and incorporates both isotropic and kinematic hardening. The von Mises yield criterion is modified to include the effects of damage through the use of the hypothesis of elastic energy equivalence. A modified elasto-plastic stiffness tensor that includes the effects of damage is derived within the framework of the proposed model. The damage variable used represents average material degradation which reflects the various types of damage at the microscale level like nucleation and …

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A Total Lagrangian Finite Element Analysis For Metal Forming With Application To Metal Extrusion., Mehrdad Foroozesh Jan 1989

A Total Lagrangian Finite Element Analysis For Metal Forming With Application To Metal Extrusion., Mehrdad Foroozesh

LSU Historical Dissertations and Theses

A detailed formulation for finite element analysis of metal forming problems is carried out in this work. It incorporates every aspect of the analysis, including the iterative solution procedures for geometric and material non-linearities, implementation of the material model, and formulation of curved contact boundaries. The finite element formulation is based on a Total Lagrangian approach which by-passes the use of the Jaumann stress rate tensor commonly used in the Updated Lagrangian formulation. The yield model used is of the von Mises type with both kinematic and isotropic hardening and is formulated in the Eulerian space. This model is then …

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Geometric Modeling And Recognition Of Elongated Regions In Images., Charles Anthony Lipari Ii Jan 1989

Geometric Modeling And Recognition Of Elongated Regions In Images., Charles Anthony Lipari Ii

LSU Historical Dissertations and Theses

The goal of this research is the recovery of elongated shapes from patterns of local features extracted from images. A generic geometric model-based approach is developed based on general concepts of 2-d form and structure. This is an intermediate-level analysis that is computed from groupings and decompositions of related low-level features. Axial representations are used to describe the shapes of image objects having the property of elongatedness. Curve-fitting is shown to compute axial sequences of the points in an elongated cluster. Script-clustering is performed about a parametric smooth curve to extract elongated partitions of the data incorporating constraints of point …

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Fine Scale Velocity Measurements In A Turbulent Jet In A Confined Crossflow., Julie Ann Mathis Jan 1989

Fine Scale Velocity Measurements In A Turbulent Jet In A Confined Crossflow., Julie Ann Mathis

LSU Historical Dissertations and Theses

Measurements of the fine scale velocity field are made for a turbulent jet in a confined crossflow. With a crossflow velocity of 10.0 m/sec, jet-to-crossflow velocity ratios of 1, 2 and 4 are examined. Velocity measurements are obtained by laser velocimetry. The velocimetry system consists of a 15mW laser with a fringe mode optics setup, operated in the backscatter mode. Signal processing is accomplished with a tracker processer. At each measuring location, 28,400 velocity readings are obtained at a sampling frequency of 38,460 sec$\sp{-1}$. Calculations include construction of autocorrelation functions, Kolmogorov-normalized energy spectra and their moments, skewness and flatness of …

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Louisiana Agricultural Productivity: A Multi-Input Multi-Output Approach., Abiodun Ojemakinde Jan 1989

Louisiana Agricultural Productivity: A Multi-Input Multi-Output Approach., Abiodun Ojemakinde

LSU Historical Dissertations and Theses

Agricultural research and extension is an important contributor to Louisiana agriculture. However, there is no documented work investigating the impacts of public agricultural research and extension on agricultural production in Louisiana. This study investigates the impacts of public agricultural research and extension and other quasi-fixed factors on production choices of the Louisiana farmers. The specific objectives of this study are: (1) to estimate conditional output supply equations for Louisiana's main crops and livestock and input demand equations for fertilizer and labor, (2) to evaluate the impacts of public agricultural research and extension and other quasi-fixed inputs on the Louisiana agricultural …

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