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The Danish Cadastral Survey Of St. Croix, 1733-1754 (Virgin Islands)., Daniel Price Hopkins Jan 1987

The Danish Cadastral Survey Of St. Croix, 1733-1754 (Virgin Islands)., Daniel Price Hopkins

LSU Historical Dissertations and Theses

This dissertation presents the history of the original cadastral survey of St. Croix by the Danish West India and Guinea Company in the early eighteenth century. St. Croix, the largest of the United States Virgin Islands, is distinguished by a remarkably regular and rectangular pattern of roads and properties, which appears to have had no parallel in the Lesser Antilles or Denmark. This is a case study of how colonial administrators approached the problem of the orderly alienation and demarcation of previously undivided land. The study is based mainly on original manuscript Company records in the Danish State Archive in …

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The Effect Of Microstructure On Constitutive Equations For Metals., Pithuk Keattipun Jan 1987

The Effect Of Microstructure On Constitutive Equations For Metals., Pithuk Keattipun

LSU Historical Dissertations and Theses

A closed-loop system for constant true strain rate test was modified using a Zenith Z-158 microcomputer connected to an optical sensor and MTS tensile testing machine. This new system has several desirable features: (1) the system is easy to operate; (2) the system works with any round shape of ASTM standard specimen; (3) the system works with a constant true strain rate or any form of strain rate; and (4) the system can be controlled to pause or stop at any pre-selected time or amount of true axial strain. Three types of materials, electrical grade iron, austenitic stainless steel, and …

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A Numerical Analysis Of Heterojunction Bipolar Devices., Freidoon Mehrad Jan 1987

A Numerical Analysis Of Heterojunction Bipolar Devices., Freidoon Mehrad

LSU Historical Dissertations and Theses

Numerical simulation plays an important role in the design, analysis and fabrication of semiconductor devices. In this work, a computer program is developed to obtain a one-dimensional steady-state constant temperature current-voltage characteristics of diodes and bipolar transistors fabricated from materials having position dependent material properties such as band-gap, electron affinity, permittivity and the density of states functions. The general formulation of the problem allows for an unambiguous choice of reference potential. The modular form of the program allows for the choice of appropriate recombination processes for each of the materials used in the structure. The program can adjust the step …

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Resort Evolution Along The Gulf Of Mexico Littoral: Historical, Morphological, And Environmental Aspects., Klaus J. Meyer-Arendt Jan 1987

Resort Evolution Along The Gulf Of Mexico Littoral: Historical, Morphological, And Environmental Aspects., Klaus J. Meyer-Arendt

LSU Historical Dissertations and Theses

The development histories of eight coastal resorts along the Gulf of Mexico littoral (Fort Myers Beach, Pensacola Beach, Dauphin Island, Grand Isle, Galveston Island, South Padre Island, Tecolutia, and Progreso) are documented to evaluate variability of temporal, spatial, and environmental aspects of resort development. Temporally, a modified S-curve model of resort evolution is offered to describe the historical development of seaside resorts, and stages of exploration, infrastructural development, and settlement expansion precede each resort's levelling off stage. The upper level of development, or level of maturation, varies among the sites, primarily as a function of demand. Resorts in high demand …

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Design Of A Generic Manufacturing Cell Control System., Derya Pamukcu Jan 1987

Design Of A Generic Manufacturing Cell Control System., Derya Pamukcu

LSU Historical Dissertations and Theses

The feasibility of design and demonstration of a cell control system to function in the fully integrated manufacturing environment independent of the parts produced or the manufacturing processes involved was investigated. A hierarchical control structure was used. Free standing implementations of a cell controller, a workstation controller, and programmable device interfaces were designed. The system is data driven, and was designed to use the manufacturing databases that exist in the computer integrated manufacturing environment. Operation of the cell controller and its interaction with the rest of the system was demonstrated in real-time by simulating the computer integrated manufacturing environment on …

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Vacuum Growth And Characterization Of Thin Films Of Zinc Tin Diphosphide., Hyun Yong Shin Jan 1987

Vacuum Growth And Characterization Of Thin Films Of Zinc Tin Diphosphide., Hyun Yong Shin

LSU Historical Dissertations and Theses

A vacuum growth technique has been employed for the first time to grow thin films of ZnSnP$\sb2$. Near stoichiometric thin films of polycrystalline ZnSnP$\sb2$ have been grown on GaAs and quartz substrates. A reasonable degree of reproducibility of the film composition from one run to the next was achieved by using a quadrupole mass analyzer probe in conjunction with a digital feedback controller to maintain constant Zn flux. The growth parameters for the system including the estimates for the Zn/Sn flux ratio at the substrate and the optimum substrate temperature have been obtained for the near stoichiometric film growth. The …

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Repricing Made-To-Order Production Programs., Mehmet Murat Tarimcilar Jan 1987

Repricing Made-To-Order Production Programs., Mehmet Murat Tarimcilar

LSU Historical Dissertations and Theses

Planned procurement quantities in made-to-order production programs are often altered after production has started. Cost analysts are concerned about providing cost estimates for alternatives to ongoing programs. This research develops a new model for repricing made-to-order production programs. It is an effort to integrate a theoretically developed production phase prediction model into a comprehensive repricing model. The production model is defined by a cost function that employs the impact of two cost determinants, production rate and learning. It is supported by economic theory and is consistent with our knowledge of made-to-order production process. The theoretical model links the direct costs …

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The Effect Of Micromorphological Development On The Elastic Moduli Of Fly Ash-Lime Stabilized Bentonite., Gokhan I. Baykal Jan 1987

The Effect Of Micromorphological Development On The Elastic Moduli Of Fly Ash-Lime Stabilized Bentonite., Gokhan I. Baykal

LSU Historical Dissertations and Theses

The mineralogical and micromorphological changes occurring in fly ash-lime stabilized bentonite were observed and related to changes in elastic moduli of the stabilized mixture. Compacted fly ash, fly ash-lime, bentonite-lime, bentonite-fly ash, and bentonite-fly ash-lime mixtures were prepared and cured at 23$\sp\circ$C and 50$\sp\circ$C, for 1, 28, 90 and 180 days. The development of microstructure and cementitous crystals were observed by a scanning electron microscope, and energy dispersive spectrum analyzer and a X-Ray diffractometer. The elastic moduli and strengths were obtained from unconsolidated undrained triaxial and unconfined compressive strength tests. The physical test results were compared with changes observed by …

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Generation, Migration, And Transportation Of Gas Contaminated Regions Of Drilling Fluid., Vicente Casariego Jan 1987

Generation, Migration, And Transportation Of Gas Contaminated Regions Of Drilling Fluid., Vicente Casariego

LSU Historical Dissertations and Theses

The control of high pressure gas encountered while drilling for hydrocarbon reservoirs is one of the more expensive and potentially dangerous problems of the oil producing industry. When the control of high pressure gas is not accomplished flow of gas from the formation to the wellbore occurs. Once detected, the gas influx is stopped by shutting-in the well. This is the first measure taken in a series of operations which are designed to bring back the well under control. These operations are referred to as well control procedures. Well control simulators are used both for evaluating well control procedures and …

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A Search For Neutrino Oscillations., Wai Ching Choi Jan 1987

A Search For Neutrino Oscillations., Wai Ching Choi

LSU Historical Dissertations and Theses

A search for neutrino oscillation has been carried out at LAMPF (the Los Alamos Meson Physics Facility). The engineering run in the 1986 cycle has demonstrated that the detector works as designed. The probability of oscillation between two neurino types $\nu\sb1$ and $\nu\sb2$ can be parameterized by two variables: (1) the difference between the squares of the masses of two mass eigenstates $\delta$m$\sp2$ $(\equiv\ \vert$m$\sb1\sp2$ - m$\sb2\sp2\vert),$ and (2) the mixing angle $(\theta)$ between the two states. In this experiment, we set limits on the oscillations $\bar\nu\sb\mu$ $\to$ $\bar\nu\sb{\rm e}$ and $\nu\sb{\rm e}$ $\to$ $\bar\nu\sb{\rm e}$ as a function of …

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Effects Of Crude Oil Composition And Alcohol Augmentation On Transient Interfacial Phenomena In Alkaline-Water/Crude-Oil Systems., Vivien Johan Cambridge Jan 1987

Effects Of Crude Oil Composition And Alcohol Augmentation On Transient Interfacial Phenomena In Alkaline-Water/Crude-Oil Systems., Vivien Johan Cambridge

LSU Historical Dissertations and Theses

The microscopic phenomena which occur at the alkaline-water/crude-oil interface greatly affect the potential for success of the alkaline water flooding process. The propensity of crude oils to emulsify and the ability of the oil to coalesce improves the chance for successful oil bank formation and leads to better recovery efficiency. Interfacial phenomena are affected by interfacial rheological properties and interfacial tensions. This research investigates the interfacial behavior of alkaline-water/crude-oil systems in three parts. In part one, a new method and apparatus are designed for the measurement of interfacial shear viscosity (IFSV). The method is applied to study the effect of …

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Computer Simulation Of Hydrostatic Co-Extrusion Of Bimetallic Compounds., Mohammad Mohammad Abadi Dehghani Jan 1987

Computer Simulation Of Hydrostatic Co-Extrusion Of Bimetallic Compounds., Mohammad Mohammad Abadi Dehghani

LSU Historical Dissertations and Theses

A study of hydrostatic co-extrusion of a hard-core/soft-clad bi-metallic compound has been conducted. The research employs the Sachs' boring-out technique to determine the residual stress distribution in a hydrostatically co-extruded copper-clad Gildcop composite. A parallel simulation of the residual stress distribution in such composites extruded to extrusion ratios of 2.25, 4.0, and 7.5 was conducted using the ABAQUS finite element code. The version of the code employed uses an elastic-plastic constitutive law for material behavior and does not simulate deformation heating effects. Data for the mechanical properties were obtained experimentally by constant true strain-rate tests on material identical to that …

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Single- And Two-Phase Reacting Flow Predictions---Modeling Of Non-Equilibrium Effects, Turbulent Particle Dispersion And Nitrogen-Oxide Formation In Pulverized Coal Combustion., Dong Soon Jang Jan 1987

Single- And Two-Phase Reacting Flow Predictions---Modeling Of Non-Equilibrium Effects, Turbulent Particle Dispersion And Nitrogen-Oxide Formation In Pulverized Coal Combustion., Dong Soon Jang

LSU Historical Dissertations and Theses

The objective of this dissertation study is to evaluate and improve the modeling of individual processes associated with single- and two-phase turbulent reaction processes. In particular, attention is focused on the pulverized coal combustion process, and a reliable comprehensive computer code for pulverized coal combustion systems is developed to assist in design developments. Primary emphasis in this work has been on the modeling of non-equilibrium turbulent reactions, turbulent particle dispersion, and pollutant species formation. In addition, contributions have been made towards improving the numerical algorithm for pressure-velocity linked system in swirling flows. Two turbulent reaction models are developed for resolving …

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Multivariable Control Of Double Effect Heat Integrated Distillation Columns., Shao-Yu Lin Jan 1987

Multivariable Control Of Double Effect Heat Integrated Distillation Columns., Shao-Yu Lin

LSU Historical Dissertations and Theses

The design of a reliable control scheme and efficient computer control algorithm for the double effect heat integrated distillation columns under floating pressure operation to control four product compositions on setpoint specifications has been studied. The system includes a pair of distillation columns with the vapors of one column providing the heat source for the other column. The economic profitabilities of four different configurations of the double effect heat integrated distillation columns for the methanol and water system have been investigated using the ASPEN PLUS process simulation program. Three of the four configurations of the double effect heat integrated columns …

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Borehole Friction Assessment And Application To Oilfield Casing Design In Directional Wells., Eric Edgar Maidla Jan 1987

Borehole Friction Assessment And Application To Oilfield Casing Design In Directional Wells., Eric Edgar Maidla

LSU Historical Dissertations and Theses

The phenomenon of mechanical friction in the oil well borehole was investigated. Immediate application of such a study is to improve casing design in directional wells. An additional application is the prediction of reciprocating loads in directional wells for cementing purposes, that is recognized to be an effective method to avoid cement channeling through efficient mud displacement. Field studies on the borehole friction coefficient revealed its insensitivity to depth, various well trajectories, size of pipe and its surface configuration, leading to the conclusion that one value of the borehole friction factor can represent a single well. Also there was good …

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Occupational Assimilation Of Asian Americans, 1980., Gloria Luz Rodriguez Martinez Jan 1987

Occupational Assimilation Of Asian Americans, 1980., Gloria Luz Rodriguez Martinez

LSU Historical Dissertations and Theses

This study was designed to examine the existence of differential returns to social and demographic characteristics on occupational status among whites and Asian American males aged 25-64 years old. The human capital, assimilation and segmented labor market theories of occupational attainment provided framework for investigating the occupational differentials of each of the six major groups of Asian Americans with whites. Using data drawn from the one-percent sample of the 1980 census, Public Use Microdata Samples (PUMS), it was found that Asian Americans are economically assimilated. Findings attesting to this fact are as follows: first, the occupational distribution of the Asian …

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Analyses Of Selected Factors Affecting The Accuracy Of Aerial Surveys Of Mottled Ducks., James Ronald Nassar Jan 1987

Analyses Of Selected Factors Affecting The Accuracy Of Aerial Surveys Of Mottled Ducks., James Ronald Nassar

LSU Historical Dissertations and Theses

Two experiments were conducted to test the effects of observer ability, ambient illumination, glare, sun angle, time of day, bird reaction, wetland type, vegetative cover, and non-flushing birds on results of aerial surveys of mottled ducks (Anas fulvigula). In Experiment I, aerial surveys for mottled ducks were conducted in Louisiana from January 1985 through April 1986 to determine the effects of observer, weather, glare, time of day, and bird reaction on results. An experienced, but non-current, waterfowl observer initially detected a greater number of birds than an experienced and current observer, observers did not differ in 17 subsequent surveys. Time …

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Adaptive Grid Solution Procedure For Elliptic Flows., Fadl Hassan Moukalled Jan 1987

Adaptive Grid Solution Procedure For Elliptic Flows., Fadl Hassan Moukalled

LSU Historical Dissertations and Theses

This thesis deals with the formulation of a computationally efficient adaptive grid system for two-dimensional elliptic flow and heat transfer problems. The formulation is in a curvilinear coordinate system so that flow in irregular geometries can be easily handled. An equal order pressure-velocity scheme is formulated in this thesis to solve the flow equations. An adaptive grid solution procedure is developed in which the grid is automatically refined in regions of high errors and consecutive calculations are performed between the coarse grid and adapted grid regions in the same spirit as that of a Multi-Grid method. In orthogonal coordinate systems, …

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Experimental And Finite Element Study Of Residual Stresses In Zircaloy-4(R) And Ofhc Copper Tubes., Jahangir Rasty Jan 1987

Experimental And Finite Element Study Of Residual Stresses In Zircaloy-4(R) And Ofhc Copper Tubes., Jahangir Rasty

LSU Historical Dissertations and Theses

Non-homogeneous plastic deformation associated with metal-forming operations results in a state of residual stress in the final product. Complete evaluation of the mechanical behavior of the product under operating condition requires a knowledge of these stresses. In order to evaluate the magnitude and distribution of residual stresses, existing experimental techniques are complemented by computer-aided simulation of the forming process using elastic-plastic finite element method (FEM). It is found the FEM can be effectively utilized to simulate metal-forming operations in order to determine the combination of process variables which optimizes the residual stress distribution in the final product. In the experimental …

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Stability And Stabilization Of The Wave Model., Masoud Shafiee Jan 1987

Stability And Stabilization Of The Wave Model., Masoud Shafiee

LSU Historical Dissertations and Theses

The stability properties of 2-D systems are an important aspect of the design of acoustic, seismic, image and sonar signal processors. This research utilizes the Wave model format to transport 1-D stability techniques to the 2-D setting. The research studies stability through multistep growth bounds on the Wave state. The use of Lyapunov theory is also considered. The research considers also the problem of stabilizing a 2-D system using state and/or output information feedback to interior and/or boundary controls. Finally the problem of observer design for 2-D systems is considered, with the new stability criteria being used to assure observer/system …

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Louisiana Agriculture Magazine, Winter 1987-1988, Lsu Agricultural Experiment Station Jan 1987

Louisiana Agriculture Magazine, Winter 1987-1988, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Cenobium 1987, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, Roberta Beckers Jan 1987

Cenobium 1987, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, Roberta Beckers

Cenobium Yearbook

Cenobium began publication in 1977 and continued through 1990. Produced by students, the yearbooks are a chronicle of the daily life and the special events experienced by veterinary students at the LSU School of Veterinary Medicine.

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Three-Dimensional Turbulent Flowfield In A Turbine Stirred Tank., Sheng-Yang Ju Jan 1987

Three-Dimensional Turbulent Flowfield In A Turbine Stirred Tank., Sheng-Yang Ju

LSU Historical Dissertations and Theses

Solutions of conservation equations for the three-dimensional turbulent flowfield in agitated vessels were developed. Results showed that the Navier-Stokes equations with the nonisotropic k-$\varepsilon$ turbulence model described the three-dimensional velocity profiles and turbulence kinetic energy and its dissipation rate for the flowfield. The nonisotropic model considered the rotational effect on turbulence with a turbulent-Richardson-number term and accounted for the important baffling effects through the nonisotropy of the viscosity. The solutions were validated with the experimental data for velocities and turbulence parameters. An isotropic k-$\varepsilon$ turbulence model for rotational flow was also used. This modified isotropic k-$\varepsilon$ model proved to be …

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Louisiana Agriculture Magazine, Spring 1986, Lsu Agricultural Experiment Station Apr 1986

Louisiana Agriculture Magazine, Spring 1986, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Gumbo Yearbook, Class Of 1986, Louisiana State University And Agricultural And Mechanical College Jan 1986

Gumbo Yearbook, Class Of 1986, Louisiana State University And Agricultural And Mechanical College

Gumbo Yearbook

The Gumbo yearbook chronicles the entire academic year at LSU. In words and especially photos, the Gumbo shows the people, places, and events that make each year unique. In addition to formal portraits of schools and departments, the book contains hundreds of snapshots of students with their friends and dozens of pages showcasing organizations.

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Cenobium 1986, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, Bridget Peterson, Suzanne Stalker Jan 1986

Cenobium 1986, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, Bridget Peterson, Suzanne Stalker

Cenobium Yearbook

Cenobium began publication in 1977 and continued through 1990. Produced by students, the yearbooks are a chronicle of the daily life and the special events experienced by veterinary students at the LSU School of Veterinary Medicine.

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Evaluation Of Some Properties Of Sugarcane Using Four Selected Techniques (Nmr, Nir)., Claudio Bianor Sverzut Jan 1986

Evaluation Of Some Properties Of Sugarcane Using Four Selected Techniques (Nmr, Nir)., Claudio Bianor Sverzut

LSU Historical Dissertations and Theses

A study was undertaken to evaluate new methods for rapid estimation of sugar, fiber, and moisture contents as well as the biomass of sugarcane. The NIR method can analyze the samples for sugar, moisture, fiber, and Pol values in less than one minute. The microwave method can reduce the time necessary to perform sugar and moisture analysis using the press method from 48 hours to a few minutes. Gamma ray transmission can be used to estimate crop yield in the field, and NMR can be used to measure the moisture content of whole stalks of sugarcane if its accuracy is …

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Drug-Related Homicide In Dade County (Miami), Florida; 1978-1980., James Francis Quinn Jan 1986

Drug-Related Homicide In Dade County (Miami), Florida; 1978-1980., James Francis Quinn

LSU Historical Dissertations and Theses

This study examines the characteristics of all homicide victims in Miami, Florida between 1978 and 1980 (N = 1186). Data was collected from the Medical Examiner's office and local law enforcement agencies. The study relates the distribution of various aspects of homicidal situations to one another and to behavioral, cultural, and structural groupings of victims. Special attention is given to levels of drug market involvement. Inferences are made at an aggregate level relevant to categories of victims. Social groupings of victims were better predictors of homicidal circumstances than socioeconomic status levels. SES was found to be most relevant to the …

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Non-Marine Atchafalaya Deltas: Processes And Products Of Interdistributary Basin Alluviation, South-Central Louisiana (Fluvial Deposits, Lacustrine)., Robert S. Tye Jan 1986

Non-Marine Atchafalaya Deltas: Processes And Products Of Interdistributary Basin Alluviation, South-Central Louisiana (Fluvial Deposits, Lacustrine)., Robert S. Tye

LSU Historical Dissertations and Theses

Progradation of lacustrine deltas alluviated the interdistributary lowlands which occupy the transition zone between the alluvial valley and marine delta in the Atchafalaya Basin. Sediment introduced into the basin during the last 700 years by a major Mississippi River distributary has accumulated in the form of thin, regionally extensive deltas. Deltaic sedimentation is cyclic in nature. Rapid subsidence (basin downwarping and sediment compaction), in conjunction with lateral shifts in the site of deposition, creates vertically stacked deltaic wedges separated by backswamp deposits. One such delta prograded 6.5 km into Lake Fausse Pointe, grew to an area in excess of 29 …

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Apparent Thermal Diffusivity Of Soil Determined By Analysis Of Diurnal Temperatures (Fourier Series, Nonlinear Regression)., Thomas Anthony Costello Jan 1986

Apparent Thermal Diffusivity Of Soil Determined By Analysis Of Diurnal Temperatures (Fourier Series, Nonlinear Regression)., Thomas Anthony Costello

LSU Historical Dissertations and Theses

A method of indirect measurement of the apparent thermal diffusivity of soil, in situ, was developed, tested, and evaluated. The method was based on an analysis of diurnal variations in soil temperature measured at several depths near the surface of an undisturbed mineral soil (a silty clay loam), near Baton Rouge, Louisiana. A thermocouple insertion technique was developed and implemented to precisely locate the sensors in undisturbed soil, thereby reducing experimental error in soil temperature measurement. The apparent thermal diffusivity was determined from an implicit relationship derived from transient one dimensional heat conduction theory. Nonlinear regression analysis was used to …

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