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Articles 10741 - 10770 of 11944
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Design Of The Laboratory Analog, Lsu Petroleum Engineering Research And Technology Transfer Laboratory
Design Of The Laboratory Analog, Lsu Petroleum Engineering Research And Technology Transfer Laboratory
Faculty Publications
No abstract provided.
Visual Analog Study Of Fill-Hole Drifts, Lsu Petroleum Engineering Research And Technology Transfer Laboratory
Visual Analog Study Of Fill-Hole Drifts, Lsu Petroleum Engineering Research And Technology Transfer Laboratory
Faculty Publications
No abstract provided.
Evolution Of The Site Of Afton Villa, Kathleen Mills Perilloux
Evolution Of The Site Of Afton Villa, Kathleen Mills Perilloux
LSU Historical Dissertations and Theses
The gardens of Afton Villa Plantation are a rare surviving example from the 1840-1860 period in Louisiana. The gardens are open to the public and are being maintained and enhanced by the present owners. The site was placed on the National Register of Historic Places in 1983. The history of the entire site of Afton Villa in West Feliciana Parish, Louisiana is discussed, tracing the historical, cultural and design influences that affected the site's development, beginning with the original settlers in the late 1700's. The house and gardens known as Afton Villa, built in 1849 by wealthy planter David Barrow …
Landscape Development And Coastal Wetland Losses In The Northern Gulf Of Mexico, R. Eugene Turner
Landscape Development And Coastal Wetland Losses In The Northern Gulf Of Mexico, R. Eugene Turner
Faculty Publications
The causes of the extensive (0.86%/yr; 288,414 ha/yr) and well documented dramatic and accelerating rate of coastal wetland loss in the northern Gulf of Mexico were investigated by an interdisciplinary university research team to discern the role of outer continental shelf development. The landscape changes and potential causal agents are emphasized herein. Natural driving factors include sea level rise and geological com- paction, which appear to remain constant this century, and sediment supply from the Mississippi River which has declined by 50%,since the 1950s. Man-made influences include hydrologic changes from river diversions, flood protection levees, an extensive canal and spoil …
Diffusivity Estimation For Counterdiffusing Reactants In Catalytic Solids., Chauchyun Chang
Diffusivity Estimation For Counterdiffusing Reactants In Catalytic Solids., Chauchyun Chang
LSU Historical Dissertations and Theses
The diffusivities of molecules whose sizes approach the intracrystalline pore sizes of zeolites have been studied at and near conditions prevailing during catalysis, by both desorption and kinetics techniques. For the desorption approach, a series of unary isothermal desorption experiments (following an almost instantaneous initial temperature rise) were conducted for toluene or benzene with five different zeolites. Diffusion and readsorption are shown to control the process. The intracrystalline diffusivities (D$\sb{\rm e}$) were derived by fitting the desorption curves with four models of varying complexity; only models which take into account readsorption (either at equilibrium or not) can both fit the …
Application Of The Fluctuating Watertable Model In The Management Of A Controlled-Drainage/Subirrigation System., Rufino Sapiton Garzon
Application Of The Fluctuating Watertable Model In The Management Of A Controlled-Drainage/Subirrigation System., Rufino Sapiton Garzon
LSU Historical Dissertations and Theses
A model was developed to predict daily change in WT depth and was used for WT management simulations. The model was calibrated and tested using climatological and WT data for a subsurface drainage system at Louisiana Agricultural Experiment Station's Ben Hur Research Farm, Baton Rouge, Louisiana. Monthly daily reaction factor and daily recharge coefficient were determined. Recharge coefficients were multiplied by a correction factor to account for antecedent soil moisture condition prior to the onset of rain. Two methods considered in the estimate of the correction factor were: Method I, the correction factor was taken as the reciprocal of the …
Predicting Potassium Uptake By White Clover With A Mathematical Model And Assessment Of White Clover Phosphorus And Potassium Status With The Dris., Hubert Joseph Savoy Jr
Predicting Potassium Uptake By White Clover With A Mathematical Model And Assessment Of White Clover Phosphorus And Potassium Status With The Dris., Hubert Joseph Savoy Jr
LSU Historical Dissertations and Theses
Environmental concerns emphasize the requirement for diagnostic tools compatible with more intensively managed agricultural systems. Two recent approaches, the Barber-Cushman mechanistic model and the Diagnosis and Recommendation Integrated System (DRIS), appear to offer more accurate predictions of soil nutrient supply and more flexible means of assessing plant nutrient status, respectively, than conventional methods. The objectives of this research were to verify the aforementioned models for predicting K uptake and assessing P and K status of LA S-1 white clover. In growth chamber experiments, the Barber-Cushman model correctly predicted K uptake by plants for up to 21 days from Rita muck, …
Louisiana Agriculture Magazine, Winter 1990-1991, Lsu Agricultural Experiment Station
Louisiana Agriculture Magazine, Winter 1990-1991, Lsu Agricultural Experiment Station
Louisiana Agriculture
No abstract provided.
Lévy Laplacian Of Generalized Functions On A Nuclear Space, Hui Hsiung Kuo, Nobuaki Obata, Kimiaki Saitô
Lévy Laplacian Of Generalized Functions On A Nuclear Space, Hui Hsiung Kuo, Nobuaki Obata, Kimiaki Saitô
Faculty Publications
The Lévy Laplacian ΔF(ξ) = limN→∞N-1∑n = 1N 〈F″(ξ),en⊗ en〉 is shown to be equal to (i) ∝TF″s″(ξ;t)dt, where Fs″ is the singular part of F″, and (ii) 2limρ{variant}→0ρ{variant}-2(MF(ξ,ρ{variant})-F(ξ)), where MF is the spherical mean of F. It is proved that regular polynomials are Δ-harmonic and possess the mean value property. A relation between the Lévy Laplacian Δ and the Gross Laplacian ΔGF(ξ) = ∑n = 1∞=〈F″(ξ),en⊗ en〉 is obtained. An application to white noise calculus is discussed. © 1990.
Lsu General Catalog 1990-1991, Louisiana State University And Agricultural And Mechanical College
Lsu General Catalog 1990-1991, 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.
Interaction Properties Of Geogrids In Reinforced Soil Walls, Testing And Analysis., Khalid A. Farrag
Interaction Properties Of Geogrids In Reinforced Soil Walls, Testing And Analysis., Khalid A. Farrag
LSU Historical Dissertations and Theses
The considerable development of the geosynthetics and their increasing use in soil reinforcement made it necessary to develop methods of measuring the interaction properties and modeling load transfer in reinforced soil structures. The current testing procedures demonstrate significant limitations related to the testing methodology and data interpretation. In order to address these limitations, a pull-out box and direct shear box were constructed. The design of these boxes overcomes most of theses limitations and provides the capability of conducting displacement-rate controlled tests for the evaluation of short-term behavior of the soil-reinforcement system, and load-controlled tests to evaluate their time-dependent performance. The …
Studies In The Electrochemistry Of Insulators And Ion Transport: Anodization, Oscillometry, Electro-Osmosis, And Capillary Electrophoresis., Kiumars Ghowsi
Studies In The Electrochemistry Of Insulators And Ion Transport: Anodization, Oscillometry, Electro-Osmosis, And Capillary Electrophoresis., Kiumars Ghowsi
LSU Historical Dissertations and Theses
In part one, an analytical model for the growth kinetics of the anodic oxidation of Si at constant voltage is developed. The theoretical model derived for the film growth rate is consistent with the existing empirical relation reported earlier. Electronic current density, the major total current component, is shown to be nonohmic and space charge limited. Equations are derived, each as a function of time, for the total current density, the electronic current density, and the ionic efficiency during anodic oxidation. These theoretical predictions are in good agreement with the available experimental data. In part two, the high frequency conductances …
Computational Neural Learning Formalisms For Perceptual Manipulation: Singularity Interaction Dynamics Model., Sandeep Gulati
Computational Neural Learning Formalisms For Perceptual Manipulation: Singularity Interaction Dynamics Model., Sandeep Gulati
LSU Historical Dissertations and Theses
This dissertation addresses a fundamental problem in computational AI--developing a class of massively parallel, neural algorithms for learning robustly, and in real-time, complex nonlinear transformations from representative exemplars. Provision of such a capability is at the core of many real-life problems in robotics, signal processing and control. The concepts of terminal attractors in dynamical systems theory and adjoint operators in nonlinear sensitivity theory are exploited to provide a firm mathematical foundation for learning such mappings with dynamical neural networks, while achieving a dramatic reduction in the overall computational costs. Further, we derive an efficient methodology for handling a multiplicity of …
Ribosomal Rna And The Early Evolution Of Flowering Plants., Robert Keith Hamby
Ribosomal Rna And The Early Evolution Of Flowering Plants., Robert Keith Hamby
LSU Historical Dissertations and Theses
Since the end of the last century, the predominant theories of the early radiation of the angiosperms have been that the earliest flowering plants were most similar to the present-day Magnoliidae (sensu Takhtajan, 1969). This position has been adopted by many, though there are some who suggest that the base of angiosperm radiation lies within the monocots (Burger, 1981) or a combination of monocots and dicots (Burger, 1977; Donoghue and Doyle, 1989a, 1989b). Many different ancestors to the angiosperms themselves have been proposed including, at one time or another, most of the extant gymnosperms, extinct gymnosperms and the extinct seed …
Decontamination Of Soil Using Electro-Osmosis., Jihad Tawfiq Hamed
Decontamination Of Soil Using Electro-Osmosis., Jihad Tawfiq Hamed
LSU Historical Dissertations and Theses
Electrokinetic soil processing is an innovative insitu technique to remove contaminants from soils and groundwater. The process is an alternative to conventional processes, with significant economic and technical advantages. A theory is presented for pH gradient development by diffusion and convection in electrokinetic processing of soils. The premises and consequences of the theory are discussed. Based upon this theory, a mathematical model is developed to predict the pH gradient development in electro-osmosis. Electro-osmosis tests are conducted on saturated kaolinite specimens loaded with Pb(II), Cd(II), and Cr(III) to investigate the feasibility, efficiency, and energy requirements of the process in removal of …
An Adaptive Control System For Biological And Robotic Simulations., Sunggyu Kwon
An Adaptive Control System For Biological And Robotic Simulations., Sunggyu Kwon
LSU Historical Dissertations and Theses
An adaptive control algorithm based on Albus' CMAC (Cerebellar Model Articulation Controller) was studied with emphasis on how to build a Multilayered CMAC Control System. This concept has been devised to circumvent the excessive memory requirements of CMAC controllers for complex control systems with many inputs. The Neighborhood Sequential Training technique was devised as a general CMAC training technique. This training technique is straightforward to implement and well matched to CMAC's memory generalization. A two-layered CMAC control module was simulated for a six dimensional CMAC problem of trajectory control for a six degree of freedom manipulator. Layering was accomplished by …
Development, Fabrication And Verification Of The Lsu In Situ Testing Calibration Chamber (Lsu/Calchas)., Dario Cardoso De Lima
Development, Fabrication And Verification Of The Lsu In Situ Testing Calibration Chamber (Lsu/Calchas)., Dario Cardoso De Lima
LSU Historical Dissertations and Theses
This dissertation introduces the Louisiana State University Calibration Chamber System (LSU/CALCHAS) for calibrating electronic cone penetrometers and other in situ testing equipment. It permits the simulation of the K$\sb{\rm o}$ consolidation and the four (4) traditional boundary conditions commonly referred in the literature. The calibration chamber system encompasses a 304 stainless steel cylindrical calibration chamber which can house a soil sample.55 m (20 21/32 in.) in diameter and.79 m (31 1/16 in.) in height. A fully computerized control panel, a data acquisition and reduction system, a large dimension automatic tamper for preparing compacted soil samples, and accessories comprise the complete …
Low-Temperature Oxidation Of Silicon Using Point-To-Plane Corona Discharge., Mohammad Reza Madani
Low-Temperature Oxidation Of Silicon Using Point-To-Plane Corona Discharge., Mohammad Reza Madani
LSU Historical Dissertations and Theses
A technique for low temperature oxidation of silicon in dry oxygen ambient at temperatures between 25$\sp\circ$C to 500$\sp\circ$C using negative point-to-plane corona discharge is developed. The oxidation rate is a strong function of temperature is found to increase significantly in comparison with the conventional thermal oxidation rate. For the thicker films, the refractive index of the grown oxide layer approaches the value obtained for high temperature thermally grown oxide. The effects of some independent process parameters such as time, temperature, and ion current on the oxidation of silicon are studied. The electrical quality of the grown oxide film is investigated. …
In Situ And Laboratory Evaluation Of Liquefaction Resistance Of A Fine Sand., Behnam Mahmoodzadegan
In Situ And Laboratory Evaluation Of Liquefaction Resistance Of A Fine Sand., Behnam Mahmoodzadegan
LSU Historical Dissertations and Theses
Liquefaction is a phenomenon during which saturated cohesionless soils lose a major portion of their shear strength, and can potentially cause catastrophic failures. This study was focused on the in-situ and laboratory evaluation of liquefaction risk. Several types of penetration tests were performed. Four procedures were selected to evaluate the liquefaction potential of a number of sandy sublayers in two sites with well-documented seismic history. A new hollow cylinder equipment, which allows performing monotonic or cyclic liquefaction tests on annular soil specimens, was designed, fabricated and calibrated. The laboratory testing program included monotonic and cyclic liquefaction tests using two different …
The Uneasiest State: Art, Culture, And Society In New Deal Louisiana, 1933-1943. (Volumes I And Ii)., Richard B. Megraw
The Uneasiest State: Art, Culture, And Society In New Deal Louisiana, 1933-1943. (Volumes I And Ii)., Richard B. Megraw
LSU Historical Dissertations and Theses
During the Great Depression artists working in programs funded by the federal government roamed the nation wielding brushes, jotting notes, and pointing cameras in an attempt to define and characterize American society. Never before and not since has this country conducted so intensive a survey of itself, or one so controversial. Federal patronage of the arts occurred during an anxious period of political and cultural turmoil, a turmoil inherent in the story of the Arts Projects themselves. The very structure, organization, composition, execution, and objectives of the arts agencies mirror the tensions of the age. The artists' selection or avoidance …
Probabilistic Analysis Of Bridge Scour Using The Principle Of Maximum Entropy., Donald Edward Barbe'
Probabilistic Analysis Of Bridge Scour Using The Principle Of Maximum Entropy., Donald Edward Barbe'
LSU Historical Dissertations and Theses
The probability distribution function for floods and velocity profile in open channel flow are combined with scour theory to present a procedure for determining the risk of bridge failure due to scour. This is accomplished by deriving a probability distribution function for scour at a bridge pier. The theory of entropy and the principle of maximum entropy are used to determine the velocity profile. The constraints used in the entropy maximization are derived from the physical laws of conservation of mass, momentum, and energy. A procedure to approximate the solution to the resulting equations is shown. The vertical velocity is …
Formation And Destruction Of Nitric Oxide In Fuel-Rich Combustion: Reburning., Thomas Emmett Burch
Formation And Destruction Of Nitric Oxide In Fuel-Rich Combustion: Reburning., Thomas Emmett Burch
LSU Historical Dissertations and Theses
The effect of fuel type on reburning of a simulated flue gas containing 1000 ppm of NO is studied. Stable nitrogen species concentrations are provided for reburning experiments with five fuels in a premixed, laminar flow reactor. The reactor was operated at atmospheric pressure and gave a maximum gas temperature of approximately 1100$\sp\circ$C for a residence time near 0.2 seconds. The experimental facility used to collect this data is described including a novel coal feeding device. A new gas chromatographic method used to analyze fixed-nitrogen species is described. For each of the five fuels, the fixed-nitrogen speciation as a function …
A Rock-Plant Filter Bench-Scale Study And Computer Model., Donna Gail Skipper
A Rock-Plant Filter Bench-Scale Study And Computer Model., Donna Gail Skipper
LSU Historical Dissertations and Theses
In Part One, three bench-scale rock filters containing 2 feet of gravel were investigated. Two of the filters were planted with Sagittaria lancifolia and Scirpus validus, while the third filter was an unvegetated control filter. During a preliminary portion of this study, the BOD$\sb5$ surface loading was held constant at 4.96 g/day/m$\sp2$. The BOD$\sb5$ mass removal percentages at this time averaged 75%, 60%, and 44% for the Scirpus, Sagittaria, and control systems, respectively. Following this constant loading rate, an 80-day experiment was run on the filters using eight combinations of two flow rates and four influent BOD$\sb5$ concentrations, each combination …
Ecology Of Erwinia Chrysanthemi, Causal Agent Of Bacterial Stem And Root Rot On Sweet Potato And Etiology Of Souring., Valmir Duarte
Ecology Of Erwinia Chrysanthemi, Causal Agent Of Bacterial Stem And Root Rot On Sweet Potato And Etiology Of Souring., Valmir Duarte
LSU Historical Dissertations and Theses
During three seasons, mother storage roots of Beauregard sweetpotato were inoculated with Erwinia chrysanthemi in March, and the pathogen was recovered from them the day they were bedded, 7 days later, and at the first and second pullings of slips as well as from underground stems at harvest in September and October of the first and second transplantings, respectively. Little stem rot occurred in the fields during the three seasons. Thirteen strains of E. chrysanthemi, 8 isolated originally from sweetpotato and 5 from other hosts, and one strain of E. carotovora subsp. carotovora were inoculated on sweetpotato and 12 different …
The Transport And Fate Of Chromium(Vi) In Deep Well Disposal Zone., Jaehyuk Hyun
The Transport And Fate Of Chromium(Vi) In Deep Well Disposal Zone., Jaehyuk Hyun
LSU Historical Dissertations and Theses
Several parameters affecting the behavior of Chromium(+VI) in deep well injection zones were studied. Temperature, pH, concentration of inorganic salt in wastewater, and organic chemicals co-injected with wastewater were considered as they affect the adsorption and reduction rates of Cr(VI). Water content, bulk density of shale and sand, and temperature were examined for their effect on the diffusion rate of Cr(VI) in porous media. Adsorption and reduction of Cr(VI) were investigated using three clays, Na-Montmorillonite, Illite, and Kaolinite, and sand from an injection well formation in southern Louisiana, and a confining layer shale obtained from a second Louisiana injection well. …
A Rhetorical Analysis Of The Scientific-Romantic Synthesis In The Popular Scientific Writings Of Lewis Thomas., Donald Paul Lee
A Rhetorical Analysis Of The Scientific-Romantic Synthesis In The Popular Scientific Writings Of Lewis Thomas., Donald Paul Lee
LSU Historical Dissertations and Theses
As physician, educator, former medical administrator, and member of the National Academy of Sciences, Lewis Thomas has been one of the most eloquent spokespersons for the scientific community. This dissertation analyzes twenty-four of Thomas' popular scientific essays. These essays reveal a union of traditional scientific values and popular romantic themes, what is called here a rhetorical synthesis. The term synthesis is understood as the putting of two or more things together to form a whole, particularly suggesting a reconciliation of two philosophically opposing forces. Thomas' essays reflect a synthesis insofar as they merge what have traditionally been thought to be …
The Combustion Of Linear Droplet Arrays In A Coaxial Convective Flow., Jeng-Syan Tsai
The Combustion Of Linear Droplet Arrays In A Coaxial Convective Flow., Jeng-Syan Tsai
LSU Historical Dissertations and Theses
As approximations for spray-combustion processes, a series of increasingly sophisticated numerical models has been developed to simulate the combustion of linear droplet arrays in a co-axial, convective flow. Common to all of the models is an embedded grid, developed to increase computational accuracy. The first and simplest model is potential flow model (for Re $\to$ $\infty$). The flow is assumed to be ideal and infinitely-fast kinetics (flame sheet assumption) represent the combustion. The results show that the instantaneous droplet burning rates are increased as the droplet spacing is increased, and the burning rates of droplets tend asymptotically to smaller values …
Failed Or Failing Lending Institutions Behavior And Implications For The Pricing Of Mortgages., Quang Vinh Do
Failed Or Failing Lending Institutions Behavior And Implications For The Pricing Of Mortgages., Quang Vinh Do
LSU Historical Dissertations and Theses
As of 1989 more than one-fifth of the nation's federally insured saving and loans institutions have negative net worth. Very little is known, however, about their pricing behavior of financial assets. Most of the existing literature has focused on whether insolvent institutions bid up their cost of funds. The asset pricing issue of insolvent institutions has not been examined in the mortgage literature. This dissertation extends the literature by examining whether failed or failing saving and loan institutions offer their conventional fixed- and adjustable-rate mortgages at a discount relative to solvent institutions. A theoretical argument for the underpricing proposition is …
Salesperson Performance, Satisfaction And Turnover: A Review, A Reconceptualization And An Empirical Investigation., Debbie S. Easterling
Salesperson Performance, Satisfaction And Turnover: A Review, A Reconceptualization And An Empirical Investigation., Debbie S. Easterling
LSU Historical Dissertations and Theses
Search for a meaningful relationship between job satisfaction and job performance has continued for more than three decades. Despite ongoing theoretical, empirical and practical interest, research findings have been inconclusive. Literature reviews indicate that there still exists much confusion concerning the relationship between satisfaction and performance. Three conceptualizations of the relationship between satisfaction and performance have been proposed: (1) satisfaction is an antecedent of performance (a view associated with the early "human relations" school of thought); (2) the view that performance leads to satisfaction (through its impact on intrinsic and extrinsic rewards); and (3) the view that the relationship between …
Utilizing A Network Program Representation To Support Production System Program Development And Execution., Sally Jo Cunningham
Utilizing A Network Program Representation To Support Production System Program Development And Execution., Sally Jo Cunningham
LSU Historical Dissertations and Theses
This dissertation discusses modifications of the internal architecture of production systems that could significantly increase the execution performance of production system programs. This increased efficiency is achieved in part by modifications to the matching step of the execution cycle. Rather than checking all possible instantiations, we propose to consider only a small subset of the potential instantiations which are the "best candidates" for firing (according to the conflict resolution scheme). The increased execution efficiency provided by this matching strategy is compounded by modifying the OPS5 conflict resolution strategies. We propose a goal-directed (look-ahead) conflict resolution strategy which will still retain …