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Engineering Analysis Of Solid Waste Management., Woodward Reid Lea Jan 1993

Engineering Analysis Of Solid Waste Management., Woodward Reid Lea

LSU Historical Dissertations and Theses

A practical methodology has been developed to analyze the cost of integrated solid waste management, which is defined as the selection and application of suitable techniques, technologies and management programs to achieve specific waste management objectives and goals, using some combination of recycling, composting, transfer to remote disposal, waste-to-energy, and landfills. The cost of both integrated and non-integrated solid waste management systems can be accurately analyzed by the methodology. Regional waste management scenarios can also be evaluated and the resulting cost estimates compared to the cost of current local waste management. A computer model has been written to execute the …

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Development And Evaluation Of An Expert System Approach To Uneven-Aged Management Of Loblolly-Shortleaf Pine Stands In The West Gulf Region., Alfredo Baptista Lorenzo Jan 1993

Development And Evaluation Of An Expert System Approach To Uneven-Aged Management Of Loblolly-Shortleaf Pine Stands In The West Gulf Region., Alfredo Baptista Lorenzo

LSU Historical Dissertations and Theses

Forest managers expend significant time and effort seeking, organizing, and synthesizing information relevant to making effective forestry decisions. Oftentimes, they must rely on the knowledge and experience of human experts, a resource that is in short supply, requires many years to acquire, and is concentrated in a few individuals. This research task suggests expert systems as one viable solution to the problems of technology transfer and automating and maintaining expertise in consistent and usable form. Expert systems are practical computer programs which solve problems that were previously considered only solvable by human expertise. The expert system developed in this research, …

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Predicting The Movement And Retention Of Pesticides In Soils: Physical And Chemical Nonequilibrium Modeling Approaches., Liwang Ma Jan 1993

Predicting The Movement And Retention Of Pesticides In Soils: Physical And Chemical Nonequilibrium Modeling Approaches., Liwang Ma

LSU Historical Dissertations and Theses

Atrazine retention and transport in a highly aggregated Sharkey clay soil were investigated through kinetic batch experiments, miscible displacement (column transport), and mathematical modeling. Batch results indicated that atrazine retention was kinetic and adsorption-desorption was hysteretic. Adsorption and desorption isotherms were well described using the Freundlich equation (S = KC$\sp{\rm N}).$ Fitted Freundlich K was a function of reaction time and initial atrazine input concentrations, whereas fitted N was only affected by reaction time. Desorption hysteresis was quantified by the maximum difference between adsorption and desorption isotherms, and showed a linear increase with reaction time. Atrazine adsorption kinetics was successfully …

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Electron-Pair Analysis For Doubly Excited Ridge States., Lijun Zhang Jan 1993

Electron-Pair Analysis For Doubly Excited Ridge States., Lijun Zhang

LSU Historical Dissertations and Theses

We study doubly excited states of atoms and negative ions by electron-pair analysis. The two-electron Schrodinger equation is analyzed in hyperspherical coordinates, with the electrons described throughout as a pair. In contrast to the current adiabatic hyperspherical method, which reverts at large distances to a description in terms of individual electrons, the pair aspect is preserved also asymptotically. Whereas the adiabatic potential wells converge to the single ionization limit, we develop potential wells converging to the double ionization limit of the system, and doubly excited states are then viewed as eigenstates of the pair in these wells. At the simplest …

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Interconnection Networks Embeddings And Efficient Parallel Computations., Emadeddin Mohamed Abuelrub Jan 1993

Interconnection Networks Embeddings And Efficient Parallel Computations., Emadeddin Mohamed Abuelrub

LSU Historical Dissertations and Theses

To obtain a greater performance, many processors are allowed to cooperate to solve a single problem. These processors communicate via an interconnection network or a bus. The most essential function of the underlying interconnection network is the efficient interchanging of messages between processes in different processors. Parallel machines based on the hypercube topology have gained a great respect in parallel computation because of its many attractive properties. Many versions of the hypercube have been introduced by many researchers mainly to enhance communications. The twisted hypercube is one of the most attractive versions of the hypercube. It preserves the important features …

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Energy Management In Louisiana's Public School Districts., Debra T. Acosta Jan 1993

Energy Management In Louisiana's Public School Districts., Debra T. Acosta

LSU Historical Dissertations and Theses

Revenues for public education are declining and school budgets are being evaluated for ways to cut waste. The maintenance and operations budget often falls victim to the budget ax as maintenance on equipment and buildings is deferred. It may be that as a result of the deferred maintenance, school districts are actually spending more on maintenance and operations and energy than before. This study sought to determine the status of energy use in Louisiana's 66 public school districts and to determine the need for an energy management education program in those districts. Data for the 1991-92 school year were collected …

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First Ray Joint Mobility, Pressure And Ulceration Of The First Metatarsal Head In Diabetic Patients., James Allen Birke Jan 1993

First Ray Joint Mobility, Pressure And Ulceration Of The First Metatarsal Head In Diabetic Patients., James Allen Birke

LSU Historical Dissertations and Theses

This dissertation reviews the pathomechanics of plantar ulceration in patients with diabetes mellitus, and studies the relationship between joint mobility, pressure and the location of ulceration at the first metatarsal head. Neuropathy, mechanical stress and vascular disease have been shown to be the primary causes of ulceration in patients with diabetes. Sensory neuropathy is considered the permissive cause of plantar ulceration. Plantar ulcerations do not occur without loss of sensation in the foot. Other factors including motor neuropathy, autonomic neuropathy, abnormal mechanical stress, foot deformity, joint limitation, and hyperkeratosis are considered important component causes in plantar ulceration. Autonomic neuropathy and …

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Women's Stories Of Reading And Writing: Three Literacy Life Histories., Mary Annette Duchein Jan 1993

Women's Stories Of Reading And Writing: Three Literacy Life Histories., Mary Annette Duchein

LSU Historical Dissertations and Theses

The stories of three retired women who have shown a lifelong and continuing commitment to learning and literacy were addressed through life history methodology. Three literacy life histories were produced which were then analyzed in light of current research in the field of reading and literacy. All life phases were addressed, but emphasis was placed on the retirement years. Results confirmed prior research in the field of reading across four lifespan phases--preformal schooling, formal schooling, homemaker/workplace, and retirement--and suggested that reading and writing grew in importance during the retirement years and led to an extension or increase in mental awareness. …

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A Multiple Objective Formulation And Algorithm For The Layout Design Of Food Processing Facilities., Francisco A. Escobar Jan 1993

A Multiple Objective Formulation And Algorithm For The Layout Design Of Food Processing Facilities., Francisco A. Escobar

LSU Historical Dissertations and Theses

A multiple objective formulation, which incorporates robustness and constraint enforcement as design criteria, is utilized to model the layout of food processing facilities. These facilities are subject to the compliance with guidelines dictated by public health agencies, changes in product mix, and variation in production levels due to seasonality, which render existing layout design algorithms unsuitable for their design. The solution of the robust multiple objective formulation is implemented using a construction heuristic algorithm, MORCH, and an improvement heuristics, MOLAD. The MORCH/MOLAD hybrid algorithm performs comparably to well known heuristic algorithms where materials handling cost is used as the only …

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Optimal Design Of A Fully Parallel Robot Manipulator., Chan Soo Kim Jan 1993

Optimal Design Of A Fully Parallel Robot Manipulator., Chan Soo Kim

LSU Historical Dissertations and Theses

Optimal design of a six degrees-of-freedom, fully parallel manipulator, called a Stewart platform is investigated. In order to optimize the mechanism, new performance measures are introduced since use of the previous methods suffer from lack of physical meaning due to dimensional inhomogeneity. To overcome the dimensional inhomogeneity problem, an Euclidean norm definition of each output space with homogeneous dimension is used to find input-output norm relation. As a result, four sets of eigenvalues are obtained which characterize translational and rotational velocity, force and torque, and position and orientation accuracy. From the four sets of eigenvalues, four determinant measures are defined, …

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Melt Elongational Flow Rheometry In Converging Channels., Hwan Chul Kim Jan 1993

Melt Elongational Flow Rheometry In Converging Channels., Hwan Chul Kim

LSU Historical Dissertations and Theses

The basic problem in polymer melt elongational rheometry is obtaining a stable and constant elongational flow field free from shear effects. The objective of this study is to present a technique to generate plug flow and elongational flow of polymer melts in a channel geometry. The results of the study included the development of analytical and numerical solutions for flow behavior in the coextrusion of a core polymer melt encapsulated by a sufficiently low viscous skin polymer melt for linear and converging die geometries. Studying the effects of the power-law index, viscosity ratio, and flow rate ratio on the velocity …

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A Blackboard Integration Of Manufacturing Databases Using An Intelligent Interface., David Anderson Koonce Jan 1993

A Blackboard Integration Of Manufacturing Databases Using An Intelligent Interface., David Anderson Koonce

LSU Historical Dissertations and Theses

The explosion of computer applications into the world of manufacturing along functional lines has produced the often mentioned "islands of automation." Although many issues and problems are involved in interfacing and integrating the databases that serve these applications, we can extract valuable data from these independent systems to provide important information to decision makers. This research resulted in the development of MIMIR (Multiple Integrated Manufacturing Information Resources), a decision support system based upon the blackboard architecture. The blackboard architecture extends the common expert system design to include multiple expert systems, termed Knowledge Sources (KS's), which combine to solve problems too …

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Temporal And Spatial Characteristics Of Annual Maximum Precipitation In Louisiana., Babak Naghavi Jan 1993

Temporal And Spatial Characteristics Of Annual Maximum Precipitation In Louisiana., Babak Naghavi

LSU Historical Dissertations and Theses

A new procedure to compile and enhance hourly data has been proposed. A total of 92 rain gauges were used to generate 25 synthesized stations with long periods of record. Annual maximum series for various rainfall durations from the 25 synthesized stations were used for statistical analysis. Temporal and spatial characteristics of annual maximum precipitation are investigated and a new procedure for identification of climatologically homogeneous regions is proposed. This new procedure is based on statistical parameters of precipitation data and understanding of atmospheric processes. The mean annual precipitation, recorded extreme precipitations, geographical locations, and synoptic weather patterns were used …

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Three-Dimensional Large-Scale Coherent Structures In A Developing Plane Mixing Layer., Taewon Seo Jan 1993

Three-Dimensional Large-Scale Coherent Structures In A Developing Plane Mixing Layer., Taewon Seo

LSU Historical Dissertations and Theses

A theoretical investigation of the role of three-dimensional large-scale structures and their mutual interactions in a developing, plane mixing layer subjected to external forcing is presented. Large-scale structures are decomposed into 3 fundamental and 2 subharmonic wave modes. Two fundamentals and one subharmonic are three-dimensional. Linear stability of the three-dimensional, viscous shear layer is formulated and solved as the basis for the solution of a nonlinear formulation based on an energy method. This method leads to a set of nonlinearly-coupled, ordinary differential equations governing the evolution of modal energies and phases, and of the shear layer thickness. A parametric study …

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A Monte Carlo Method In Contribution Response Transport., Charles Habib Aboughantous Jan 1993

A Monte Carlo Method In Contribution Response Transport., Charles Habib Aboughantous

LSU Historical Dissertations and Theses

A contribution response Monte Carlo method is developed and successfully applied to a sample deep penetration shielding problem. The random walk is simulated in most of its parts like in conventional M.C. by introducing the concept of a fictitious response particle. The scoring is peculiar to the proposed method and it need not be made at the detector itself so that computing time can be reduced by an order of magnitude or more depending on the geometry of the problem. The probability density functions are natural. They possess properties not encountered in conventional M.C. methods currently in use. The selection …

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Neo-Hamiltonian Republicans And Military Reform In The Progressive Era: 1898-1912., Ronald James Barr Jan 1993

Neo-Hamiltonian Republicans And Military Reform In The Progressive Era: 1898-1912., Ronald James Barr

LSU Historical Dissertations and Theses

The Spanish-American War changed the course of American history. In a few months the United States acquired a colonial empire and adopted a policy of overseas involvement that greatly altered future world events. The political victory of a few military reformers and politicians, who endorsed Social Darwinism, over those who upheld the ideas of Jefferson and Jackson, destroyed the international isolation of the American republic. No matter what successive political administrations claimed, they inherited substantial overseas commitments. The group that engineered this profound change in American foreign and defence policy were led by Elihu Root, John Hay, Leonard Wood, Alfred …

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Discourses Of Maternity And The Postmodern Narrative: A Study Of Lessing, Walker, And Atwood., Janet J. Montelaro Jan 1993

Discourses Of Maternity And The Postmodern Narrative: A Study Of Lessing, Walker, And Atwood., Janet J. Montelaro

LSU Historical Dissertations and Theses

Doris Lessing's The Golden Notebook, Alice Walker's The Color Purple, and Margaret Atwood's The Handmaid's Tale are narrated by women whose social identities are partially constructed through activities traditionally associated with mothering. In each text, maternity signifies a biological event as well as the social, sexual, and material relations involved with pregnancy, childbirth, and the nurturing and rearing of children, activities which become grounds for investigating the politics of the body, of sexuality, and consequently, of gender relations. Maternity becomes politicized within the cultural contexts of each novel as maternal experience functions to produce both feminist and postmodernist critiques. In …

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Geologic And Physical Processes At A Gulf Of Mexico Tidal Inlet, East Pass, Florida., Andrew Morang Jan 1993

Geologic And Physical Processes At A Gulf Of Mexico Tidal Inlet, East Pass, Florida., Andrew Morang

LSU Historical Dissertations and Theses

East Pass, a tidal inlet located in the Florida Panhandle between Pensacola and Panama City, connects Choctawhatchee Bay to the Gulf of Mexico. A three-phase model has been developed which describes the behavior of East Pass inlet during the last 120 years, based on wave, current, tide, bathymetric and shoreline data, and on historical records. The first phase (pre-1928) is of spit development and breaching. This phase covers the period when the pass was oriented in a northwest-southeast direction between Choctawhatchee Bay and the Gulf. From 1928 to 1968, the second phase was characterized by a stable throat position but …

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Windows To Critical Thinking: Perspectives On Pedagogy In Henry James's "The Bostonians", Carson Mccullers's "The Heart Is A Lonely Hunter", And Frederick Douglass's "Narrative Of The Life Of Frederick Douglass, An American Slave"., James Thomas Mullane Jan 1993

Windows To Critical Thinking: Perspectives On Pedagogy In Henry James's "The Bostonians", Carson Mccullers's "The Heart Is A Lonely Hunter", And Frederick Douglass's "Narrative Of The Life Of Frederick Douglass, An American Slave"., James Thomas Mullane

LSU Historical Dissertations and Theses

Many times teachers restrict students to viewing literature through a single "preferred" window or from a rather small set of tiny windows, thus hindering their ability to think critically and make choices for themselves. It is my contention that our pedagogy should facilitate a "school of windows" in which students are offered many different vantage points from which to "see" literature--an environment which, instead of monologically conditioning them to accept content without criticism or question, dialogically allows them their own place and importance in active discourse. This study delineates the power that literature has to enable students to acquire these …

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Origin Of A Coarse-Grained Shallow Marine Sandstone Complex: The Coniacian Tocito Sandstone, Northwestern New Mexico. (Volumes 1 And 2)., Gregory Wayne Riley Jan 1993

Origin Of A Coarse-Grained Shallow Marine Sandstone Complex: The Coniacian Tocito Sandstone, Northwestern New Mexico. (Volumes 1 And 2)., Gregory Wayne Riley

LSU Historical Dissertations and Theses

Study of the Coniacian Tocito Sandstone, one of the shale-encased, shallow marine sandstone complexes in the Cretaceous Western Interior Basin, indicates that transport of coarse sediment to distal marine locations was accomplished by an increase in the efficiency of the marine dispersal system (tidal currents). Enhanced tidal currents were a consequence of bathymetric variations formed by uplifts along the pre-existing Four Corners Lineament system. The Tocito Sandstone forms an entirely marine, progradational-transgressive sequence and overlies an unconformity localized along uplifted submarine highs. The lower progradational strata represent the marine portion of a tide-dominated delta that prograded into a tectonically-created "embayment", …

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Reliability Analysis Of The Hypercube Architecture., Sieteng Soh Jan 1993

Reliability Analysis Of The Hypercube Architecture., Sieteng Soh

LSU Historical Dissertations and Theses

This dissertation presents improved techniques for analyzing network-connected (NCF), 2-connected (2CF), task-based (TBF), and subcube (SF) functionality measures in a hypercube multiprocessor with faulty processing elements (PE) and/or communication elements (CE). These measures help study system-level fault tolerance issues and relate to various application modes in the hypercube. Solutions discussed in the text fall into probabilistic and deterministic models. The probabilistic measure assumes a stochastic graph of the hypercube where PE's and/or CE's may fail with certain probabilities, while the deterministic model considers that some system components are already failed and aims to determine the system functionality. For probabilistic model, …

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New Approaches And Techniques For Drawing Lines On Raster Devices., Philip Arthur Graham Jan 1993

New Approaches And Techniques For Drawing Lines On Raster Devices., Philip Arthur Graham

LSU Historical Dissertations and Theses

Two basic approaches to drawing lines on raster devices are discussed and improved upon. The first is the recursive bisection algorithm, a method recently proposed by John Rankin, which uses a fractal approach to draw lines. The second is the double-step algorithm, a method proposed by Xiaolin Wu and Jon Rokne, which is based on the traditional Bresenham approach to drawing lines. Although a number of line drawing algorithms exist, the algorithms presented are of interest because the double-step algorithm is one of the fastest line drawing algorithms. Furthermore, since lines are self-similar and fractals have been found to be …

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Learning Styles And Selected Demographic Characteristics Of Dislocated Workers., Samuel Lewis Harvill Sr Jan 1993

Learning Styles And Selected Demographic Characteristics Of Dislocated Workers., Samuel Lewis Harvill Sr

LSU Historical Dissertations and Theses

The purpose of this study was to: (1) describe dislocated workers in Louisiana by learning styles and demographics; (2) compare learning style by demographics; and, (3) determine if learning style is independent of occupational area. A simple random sample of 235 dislocated worker participants was drawn from participants served in the Louisiana Job Link Center at Louisiana State University during FY89 through FY91. Data were collected using two instruments. The researcher designed recording form was used to enter the demographic variables gender, ethnicity, age, educational level, and occupational areas (DOT) codes. The Gregorc Style Delineator identified the preferred learning style …

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In Situ Determination Of Capillary Pressure And Relative Permeability Curves Using Well Logs., Adel Afifi Ibrahim Jan 1993

In Situ Determination Of Capillary Pressure And Relative Permeability Curves Using Well Logs., Adel Afifi Ibrahim

LSU Historical Dissertations and Theses

A pressure profile obtained from the formation tester defines the wettability, free water level, and hydrocarbon and water densities as well as the capillary pressure above the free water level. Correlating the pressure values to the water saturation values determined from the resistivity logs results in a capillary pressure/water saturation, $\rm P\sb{c}(S\sb{w}),$ curve characteristic of the reservoir. A relative permeability curve then can then be derived from this $\rm P\sb{c}(S\sb{w})$ curve using empirical relationships. This approach was tested in the laboratory using an eight-foot vertical sandstone core to simulate the formation. The core was fitted with electrode arrays, and resistivity …

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Synergistic Control Of N-Body Computer Generated Robots., Don Alan Iglehart Jan 1993

Synergistic Control Of N-Body Computer Generated Robots., Don Alan Iglehart

LSU Historical Dissertations and Theses

This project uses N-Body computer generated robots to investigate the fundamental problem of synergistic control of robots. This facility is important in an automated manufacturing environment and relates directly to the expanding field of study involving nonlinear systems. Experiments are performed utilizing this force controlled model to investigate nonlinear control problems using one of the techniques advanced. The principal results of this work are summarized: (1) A new simulation package is developed which uses Lagrange equations with multipliers to model two dimensional user defined robots. Three dimensionalization and parallelization are discussed and a dynamic optimization algorithm is introduced for regulating …

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Development Of New Methods For Assessing Solidification/Stabilization Of Hazardous Waste Using Solid-State Nuclear Magnetic Resonance Techniques., Michael A. Janusa Jan 1993

Development Of New Methods For Assessing Solidification/Stabilization Of Hazardous Waste Using Solid-State Nuclear Magnetic Resonance Techniques., Michael A. Janusa

LSU Historical Dissertations and Theses

New methods for assessing solidification/stabilization (S/S) of hazardous waste using solid-state nuclear magnetic resonance are developed for the purpose of diagnosing on a microscopic level the performance of S/S as a hazardous waste disposal technique. There are four techniques developed and described in this dissertation: (1) Solid-state deuterium NMR spectroscopy is used to determine if a particular deuterated organic waste is effectively solidified/stabilized and to determine the lower limit of the bond strength between the waste and the cement matrix; (2) Constant time pulsed field gradient $\sp1$H NMR spectroscopy is tested on a liquid waste encapsulated within a solidified matrix …

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Calibration Chamber Studies Of Miniature Piezocone Penetration Tests In Cohesive Soil Specimens., Pradeep Unnikrishnan Kurup Jan 1993

Calibration Chamber Studies Of Miniature Piezocone Penetration Tests In Cohesive Soil Specimens., Pradeep Unnikrishnan Kurup

LSU Historical Dissertations and Theses

The electronic piezocone penetrometer is potentially a very powerful in-situ testing device used for soil profiling and in the determination of engineering soil properties. The focus of this research is on the laboratory calibration of a miniature piezocone penetrometer in cohesive soil specimens instrumented to monitor the spatial pore pressure distribution. Two automated slurry consolidometers were developed for this research that were successful in preparing homogeneous and reproducible cohesive soil specimens. The results of eight miniature piezocone penetration tests (PCPT) and three miniature quasi-static friction cone penetration tests (QCPT) performed in a flexible double wall calibration chamber system are presented. …

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Relationship Between Vegetation And Soil Formation In A Rapidly Submerging Coastal Marsh, J. A. Nyman, R. D. Delaune, H. H. Roberts, W. H. Patrick Jan 1993

Relationship Between Vegetation And Soil Formation In A Rapidly Submerging Coastal Marsh, J. A. Nyman, R. D. Delaune, H. H. Roberts, W. H. Patrick

Faculty Publications

In a Terrebonne Basin (Louisiana) marsh, Cs dating indicated that vertical accretion (0.98cm yr ) was extremely rapid relative to other marshes, but insufficient to counter submergence (1.38cm yr ). Mineral and organic matter accumulation were similar to that in other marshes. This marsh is threatened by a positive feedback loop of plant flooding stress and inadequate vertical accretion. Inadequate plant growth limits vertical accretion, which further increases flooding and decreases plant production. Thus plant production partly determines the degree of submergence some coastal and estuarine marshes will tolerate. -from Authors 137 -1 -1

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Modification Of The Gleams Model To Incorporate Water Table And Subsurface Drainage., Manuel Reyes Reyes Jan 1993

Modification Of The Gleams Model To Incorporate Water Table And Subsurface Drainage., Manuel Reyes Reyes

LSU Historical Dissertations and Theses

The GLEAMS hydrology submodel was modified to account for the effects of shallow water table and subsurface drainage on runoff volume and soil loss. GLEAMS-WT (GLEAMS-Water Table) is a modified version of GLEAMS that accounts for shallow water table. GLEAMS-SWAT (GLEAMS with Subsurface drainage and WAter Table) is a modified version of GLEAMS that accounts for shallow water table and subsurface drainage. The simulation performances of GLEAMS, GLEAMS-WT, and GLEAMS-SWAT were evaluated by comparing their predictions with 7-years (1981-1987) of measured data from two plots of a runoff-erosion-drainage experiment at Baton Rouge, Louisiana. One plot was surface and subsurface drained, …

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High-Temperature High-Pressure Carbon Dioxide Removal From Coal Gas., Arpaden Silaban Jan 1993

High-Temperature High-Pressure Carbon Dioxide Removal From Coal Gas., Arpaden Silaban

LSU Historical Dissertations and Theses

The noncatalytic gas-solid reaction between CO$\sb2$(g) and CaO(s) to form CaCO$\sb3$(s) has been studied at high temperature and high pressure (HTHP) using a thermobalance reactor. This reaction could serve as the basis for a HTHP process for the separation of CO$\sb2$ from coal-derived gas. The kinetics of the calcination and carbonation reactions were studied as a function of temperature, pressure, CO$\sb2$ concentration, and background gas composition. Three sorbent precursors which produced CaO having a wide range of structural properties were selected for detailed kinetic studies. They were (i) reagent grade calcium carbonate, (ii) reagent grade calcium acetate, and (iii) commercial …

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