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Louisiana State University

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Louisiana Agriculture Magazine, Summer 1989, Lsu Agricultural Experiment Station Jul 1989

Louisiana Agriculture Magazine, Summer 1989, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Lumières, Spring 1989, Louisiana State University And Agricultural & Mechanical College Apr 1989

Lumières, Spring 1989, Louisiana State University And Agricultural & Mechanical College

Friends of the LSU Libraries

The bi-annual newsletters from the Friends of the Library contain information about upcoming and recent events, descriptions of new collections, a list of members, and occasional obituaries, which inform members of the news and needs of the LSU Libraries.

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Lsu General Catalog 1989-1990, Louisiana State University And Agricultural And Mechanical College Jan 1989

Lsu General Catalog 1989-1990, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The General Catalog includes information on registration and financial aid as well as academic services offered to all students.

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Eight Major Species Of Southern Oaks: A Bibliography, 1876-1987, Shih-Chang Hu Jan 1989

Eight Major Species Of Southern Oaks: A Bibliography, 1876-1987, Shih-Chang Hu

LSU Agricultural Experiment Station Reports

No abstract provided.

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Louisiana Agriclimatic Information System: Annual Climatic Summary, 1987, Kevin Douglas Robbins Jan 1989

Louisiana Agriclimatic Information System: Annual Climatic Summary, 1987, Kevin Douglas Robbins

LSU Agricultural Experiment Station Reports

No abstract provided.

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Probabilities And Climatic Patterns Of Precipitation In Louisiana, 1951-1980, R A. Muller Jan 1989

Probabilities And Climatic Patterns Of Precipitation In Louisiana, 1951-1980, R A. Muller

LSU Agricultural Experiment Station Reports

No abstract provided.

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Geomorphic And Stratigraphic Evolution Of The Middle Amite River Valley, Southeastern Louisiana., Whitney Joseph Autin Jan 1989

Geomorphic And Stratigraphic Evolution Of The Middle Amite River Valley, Southeastern Louisiana., Whitney Joseph Autin

LSU Historical Dissertations and Theses

Many streams of the northern Gulf of Mexico coastal plain have similar geomorphic and stratigraphic character and comparable influences on their drainage basin evolution. Potential geomorphic influences on floodplain morphology vary temporally and spatially in their effect and include inherent geomorphic processes, eustatic sea level rise, evolution of a stream's receiving basin, adjustment to active tectonics, and local climate fluctuation. A 14.3-km segment of meander belt in the middle Amite River valley in southeastern Louisiana was selected to test the relative effect of geomorphic factors on Holocene floodplain evolution. Floodplain evolution in this valley responded to sea level rise and …

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Determination Of The Wavelength Dependence Of The Optical Properties Of Soot From In-Situ Measurements., Hyunsoo Chang Jan 1989

Determination Of The Wavelength Dependence Of The Optical Properties Of Soot From In-Situ Measurements., Hyunsoo Chang

LSU Historical Dissertations and Theses

The index of refraction of soot particles is of considerable importance in many areas of research and engineering applications such as combustion diagnostics and radiative transfer from combustion systems. The present study aims toward the analysis of compositional effect on the refractive index and the spectral variation of the indices of soot particles by combining classical and dynamic light scattering measurements with the Kramers-Kronig relations in hydrocarbon flames. The particle size distribution is determined from photon correlation measurements. The number densities, volume fractions and refractive indices are then determined as a function of the height above the burner and fuel …

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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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The Proposal In An Engineering Context: A Field Study Of Document Development., Terry Martin Mcconathy Jan 1989

The Proposal In An Engineering Context: A Field Study Of Document Development., Terry Martin Mcconathy

LSU Historical Dissertations and Theses

The specific goal of this field study was to develop an empirically-based description of engineering proposals as they are developed and used in their natural context; this goal was designed to provide a data base for further study addressing the general research interest of why the descriptions of proposals in technical writing textbooks vary so significantly from the types of proposals produced and used in an nonacacemic environment, specifically engineering. Using strategies borrowed and adapted from sociological and anthropological research methodologies, the study focused on collecting field-based data through interviews, field notes, questionnaires, and artifacts about the form, content, structure, …

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Using Expert Systems In Maintenance Monitoring And Management., Tahoomars Rastin Jan 1989

Using Expert Systems In Maintenance Monitoring And Management., Tahoomars Rastin

LSU Historical Dissertations and Theses

In this research, a model for fault diagnosis of equipment is discussed. The model discusses the use of multi-variable monitoring for a more precise means of equipment malfunction trouble shooting. Also within this model means are discussed for automatically generating work-orders. Equipments are divided into subsystems. The subsystems are broken down into sub-subgroups and further down to individual parts. Preventive maintenance techniques, along with expert system technology, are used to develope the maintenance expert system (MES). Statistical pattern recognition techniques are used as a way to describe the relationship between categories of equipment. The relationships shown here are mostly that …

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A Dynamic Model Of Diverter Operations For Handling Shallow Gas Hazards In Oil And Gas Exploratory Drilling., Otto Luiz Alcantara Santos Jan 1989

A Dynamic Model Of Diverter Operations For Handling Shallow Gas Hazards In Oil And Gas Exploratory Drilling., Otto Luiz Alcantara Santos

LSU Historical Dissertations and Theses

This dissertation presents an experimentally verified numerical simulator to predict dynamic loads imposed on diverter systems during the well unloading following a shallow gas blowout event. Chapter I presents an overview of important aspects of well control and diverter systems. Also in this chapter, the objective of this research is precisely defined. The following chapter reports the latest efforts of the oil industry to provide diverter systems with more reliable designs and operational procedures. In Chapter III, the apparatus and procedures for the experimental work are discussed. Nine experimental runs have been conducted and the results are reported in a …

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Leader Behavior, Organizational Effectiveness And Job Satisfaction Of Vocational Teachers In Malaysia., Ahmad Mohammad Sharif Jan 1989

Leader Behavior, Organizational Effectiveness And Job Satisfaction Of Vocational Teachers In Malaysia., Ahmad Mohammad Sharif

LSU Historical Dissertations and Theses

The purposes of this study were to identify the relationships of the perceptions of both leader behavior and organizational effectiveness to the job satisfaction of vocational teachers in vocational schools in Malaysia. Nine social and demographic characteristics of respondents were also investigated. The study was also aimed at determining the relative influence of the selected factors on the job satisfaction of respondents. A simple random sample of 250 teachers was selected, of whom 225 responded. The Minnesota Satisfaction Questionnaire (MSQ) - long form was used to measure job satisfaction, while the Leader Behavior Description Questionnaire and the Index of Perceived …

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A Comprehensive Methodology For Algorithm Characterization, Regularization And Mapping Into Optimal Vlsi Arrays., Hassan Reda Barada Jan 1989

A Comprehensive Methodology For Algorithm Characterization, Regularization And Mapping Into Optimal Vlsi Arrays., Hassan Reda Barada

LSU Historical Dissertations and Theses

This dissertation provides a fairly comprehensive treatment of a broad class of algorithms as it pertains to systolic implementation. We describe some formal algorithmic transformations that can be utilized to map regular and some irregular compute-bound algorithms into the best fit time-optimal systolic architectures. The resulted architectures can be one-dimensional, two-dimensional, three-dimensional or nonplanar. The methodology detailed in the dissertation employs, like other methods, the concept of dependence vector to order, in space and time, the index points representing the algorithm. However, by differentiating between two types of dependence vectors, the ordering procedure is allowed to be flexible and time …

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Arch: A Robust Construction Heuristic For The Layout Design Of Food Processing Facilities., George Robert Baskin Jan 1989

Arch: A Robust Construction Heuristic For The Layout Design Of Food Processing Facilities., George Robert Baskin

LSU Historical Dissertations and Theses

A Robust Construction Heuristic (ARCH) represents the first attempt to develop a facilities layout design algorithm tailored to the particular solution of the food processing facility layout problem where a fluctuating product mix due to seasonality or changes in consumer demand is typical. The foundation literature for this research comes predominantly from the industrial engineering, management science, and food science fields. Construction heuristics built layouts from scratch and provided poor quality results. Robustness algorithms had no simplifying heuristics but were reported to yield potentially higher quality layouts than traditional algorithms for layout problems with fluctuating product mixes. ARCH was developed …

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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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A Framework For Efficient Execution Of Logic Programs., Sudharsan R. Iyengar Jan 1989

A Framework For Efficient Execution Of Logic Programs., Sudharsan R. Iyengar

LSU Historical Dissertations and Theses

The focus of this dissertation is to develop an efficient framework for sequential execution of logic programs. Within this framework the logic programs are executed by pruning the goal-search tree whenever applicable. Three new concepts for pruning of computation during execution of logic programs are introduced. (1) Failure-binding. A Failure-binding for a literal is a binding which when applied to the literal fails the goal obtained from the literal. Failure-bindings for a literal are identified by analyzing the goal-tree of a goal which is obtained from the literal. The failure-bindings for a literal are used for intelligent backtracking based on …

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Hypercube-Based Topologies With Incremental Link Redundancy., Shahram Latifi Jan 1989

Hypercube-Based Topologies With Incremental Link Redundancy., Shahram Latifi

LSU Historical Dissertations and Theses

Hypercube structures have received a great deal of attention due to the attractive properties inherent to their topology. Parallel algorithms targeted at this topology can be partitioned into many tasks, each of which running on one node processor. A high degree of performance is achievable by running every task individually and concurrently on each node processor available in the hypercube. Nevertheless, the performance can be greatly degraded if the node processors spend much time just communicating with one another. The goal in designing hypercubes is, therefore, to achieve a high ratio of computation time to communication time. The dissertation addresses …

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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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Agrobacterium Tumefaciens - Mediated Transfer Of Plant Dna For Gene Expression Analysis., Woo Sung Lee Jan 1989

Agrobacterium Tumefaciens - Mediated Transfer Of Plant Dna For Gene Expression Analysis., Woo Sung Lee

LSU Historical Dissertations and Theses

Agrobacterium tumefaciens causes crown gall tumor primarily in dicotyledonous plants. The infection mechanism reveals that a portion of bacterial DNA (T-DNA) is transferred into the plant nuclear genome. This transformation system is widely utilized in plant genetic engineering and plant molecular biology. In this dissertation, two experiments were carried out. First, the copy number, physical structure and F1 segregations of T-DNA copies were analyzed, attempting to understand the mode of T-DNA integration into the plant genome. While the mechanism of Agrobacterium response to plant signals and generation and transfer of T-DNA intermediates through actions of virulence genes is generally understood, …

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Modeling Flat Flames Burning Chlorinated Methanes In A Methane/Air Environment., Gary Peyton Miller Jan 1989

Modeling Flat Flames Burning Chlorinated Methanes In A Methane/Air Environment., Gary Peyton Miller

LSU Historical Dissertations and Theses

A numerical model was developed to simulate flat flames burning chlorinated methanes in a methane/air environment. The model uses a reaction mechanism containing 341 reactions and 58 species. A time-stepping solution with linearized source terms and a strict convergence criteria had to be developed to allow for convergence of the conservation equations. Simulations of ten flames were made, five simulations of dichloromethane/methane/air flames, and five simulations of carbon tetrachloride/methane/air flames. For each fuel type, simulations were performed at a constant molar Cl/H ratio of 0.3 for a stoichiometric flame, a fuel-rich flame, and a fuel-lean flame. The other simulations were …

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Theories Of Economic Regulation And The Development Of The Doctrine Of "Conspiracies In Restraint Of Trade" In The Labor Market., Edd Sidney Noell Jan 1989

Theories Of Economic Regulation And The Development Of The Doctrine Of "Conspiracies In Restraint Of Trade" In The Labor Market., Edd Sidney Noell

LSU Historical Dissertations and Theses

The purpose of this dissertation is to analyze the development of the doctrine of "conspiracies in restraint of trade" in the labor market by means of an application of two models of economic regulation. As heuristic devices, these models are utilized to explain the formation of English and American labor law in three different eras. The market failure model posits that labor market regulators seek to remedy unequal bargaining power and asymmetric information so as to achieve economic efficiency. This model's 'liberty and virtue' component emphasizes the normative end of character formation. According to the interest group model, organized labor …

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Robert Floyd Kennon: Reform Governor., Doris Dorcas Carter Jan 1989

Robert Floyd Kennon: Reform Governor., Doris Dorcas Carter

LSU Historical Dissertations and Theses

This dissertation is a study of Robert Floyd Kennon, reform governor of Louisiana, from 1952-1956. Kennon was born on August 21, 1902, near Minden, Louisiana. He received his bachelor's degrees from Louisiana State University in Baton Rouge in Liberal Arts and Law in 1923 and 1925, respectively. In 1925, he began the practice of law in Minden, and was elected as mayor of the town at age twenty-three. Five years later, he sought and won, the office of District Attorney, for the Twenty-Sixth Judicial District, a position he held for ten years. He was a staff officer in Europe during …

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Systolic Array Implementations With Reduced Compute Time., Abdulkader Omar Barbir Jan 1989

Systolic Array Implementations With Reduced Compute Time., Abdulkader Omar Barbir

LSU Historical Dissertations and Theses

The goal of the research is the establishment of a formal methodology to develop computational structures more suitable for the changing nature of real-time signal processing and control applications. A major effort is devoted to the following question: Given a systolic array designed to execute a particular algorithm, what other algorithms can be executed on the same array? One approach for answering this question is based on a general model of array operations using graph-theoretic techniques. As a result, a systematic procedure is introduced that models array operations as a function of the compute cycle. As a consequence of the …

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Use Of Infrared Piezobirefringence For Observation Of Dislocations In Semiconductors With Cubic Symmetry., Aloke Kumar Dutta Jan 1989

Use Of Infrared Piezobirefringence For Observation Of Dislocations In Semiconductors With Cubic Symmetry., Aloke Kumar Dutta

LSU Historical Dissertations and Theses

The use of infrared piezobirefringence for characterization of defects in cubic semiconductor materials is investigated in this work. Under stress, these normally isotropic materials become birefringent. The stress can result from an applied external load or from defects present in the material. Defects can be generated in the material during its growth and/or processing. As a first step towards defect characterization, the case of diametrically loaded discs of semiconductor materials was simulated. This was done to obtain a better understanding of the simulation algorithm prior to its subsequent use in dislocation characterization. A dark-field plane polariscope was constructed using a …

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The Biosynthesis Of The Chromophore Of Phycocyanin. Pathway Of Reduction Of Biliverdin To Phycocyanobilin., S. B. Brown, J. A. Holroyd, D. I. Vernon, Y. K. Shim, K. M. Smith Jan 1989

The Biosynthesis Of The Chromophore Of Phycocyanin. Pathway Of Reduction Of Biliverdin To Phycocyanobilin., S. B. Brown, J. A. Holroyd, D. I. Vernon, Y. K. Shim, K. M. Smith

Faculty Publications

The later stages in the pathway of biosynthesis of phycocyanobilin, the chromophore of phycocyanin, were studied by using radiolabelled intermediates. Three possible pathways from biliverdin IX-alpha to phycocyanobilin were considered. 14C-labelled samples of key intermediates in two of the pathways, 3-vinyl-18-ethyl biliverdin IX-alpha and 3-ethyl-18-vinyl biliverdin IX-alpha, were synthesized chemically and were administered to cultures of Cyanidium caldarium that were actively synthesizing photosynthetic pigments in the light. Neither of these two compounds was apparently incorporated into the phycobiliprotein chromophore, suggesting that two of the three pathways were not operative. By elimination, the results imply that the third possible pathway, which …

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A Knowledge-Based System For Message Translation. (Volumes I And Ii)., John Mark Usher Jan 1989

A Knowledge-Based System For Message Translation. (Volumes I And Ii)., John Mark Usher

LSU Historical Dissertations and Theses

This research addresses the use of a knowledge-based interface to provide the communication service of message translation. The focus of this research is on the technical feasibility of using a knowledge-based design to perform this service for programmable devices on the shop-floor. The uniqueness of this approach is in the use of a knowledge-based design for the software interface. This method of implementation is different from the procedural programming approach used in today's custom interfaces. This research asserts that use of a knowledge-based design will result in an interface system that is easier to construct and maintain than an interface …

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Analytical Studies Of Wireline Formation Testing And Pressure Losses Across Gravel Packs., Turhan Yildiz Jan 1989

Analytical Studies Of Wireline Formation Testing And Pressure Losses Across Gravel Packs., Turhan Yildiz

LSU Historical Dissertations and Theses

A three-dimensional (3-D) analytical model was developed to improve the analyses of the transient pressure response of a reservoir to wireline formation testing (WFT). Available analysis techniques of the WFT oversimplify the flow geometry by assuming either a radial or a spherical flow pattern. The proposed model simulates the exact flow geometry of the WFT flow pattern. The model was derived by solving the 3-D diffusivity equation coupled with the boundary conditions prevailing during the test. The Laplace transformation and the separation of variables were used to obtain the solution. The solution is expressed in terms of the infinite Fourier-Bessel …

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Dynamic Models Of The High-Temperature Desulfurization Process In A Fixed-Bed Reactor., Ching-Pin Wang Jan 1989

Dynamic Models Of The High-Temperature Desulfurization Process In A Fixed-Bed Reactor., Ching-Pin Wang

LSU Historical Dissertations and Theses

The widespread adoption of coal-fueled advanced electric power generation systems depends upon the ability to remove H$\sb2$S from the gasifier product. While H$\sb2$S can be removed by traditional wet scrubbing methods, sensible heat is lost, thereby reducing the overall system efficiency. High temperature desulfurization is now possible using newly developed metal oxide sorbents which are capable of reducing the H$\sb2$S concentration to less than 10 ppmv from a laboratory scale fixed-bed reactor using a simulated coal gas. In this study, reactor simulation models capable of describing the high temperature sulfidation and regeneration reactions of metal oxide sorbents in a fixed-bed …

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Modification Of The Erosion Productivity Index Calculator To Incorporate Subsurface Drainage Systems., George J. Sabbagh Jan 1989

Modification Of The Erosion Productivity Index Calculator To Incorporate Subsurface Drainage Systems., George J. Sabbagh

LSU Historical Dissertations and Theses

The main purpose of this research is to enable EPIC to simulate the effect of subsurface drainage systems on water budget components, sediment loss and the crop yield. To accomplish the stated purpose, four steps were taken: (1) the accuracy of the original EPIC in simulating sediment loss, crop yield and surface runoff volume for a non-subsurface drained plot was determined, (2) the hydrology section time step simulation was changed from daily to hourly and a subsurface drainage subprogram was incorporated into the model, (3) the accuracy of the modified model in simulating surface runoff volume, sediment loss, crop yield …

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