Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2003

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 9541 - 9570 of 9731

Full-Text Articles in Entire DC Network

A Methodology For Deriving Performance Measures From Spatio-Temporal Traffic Contour Maps Using Digital Image Analysis Procedures, Prashanth Kotha Jan 2003

A Methodology For Deriving Performance Measures From Spatio-Temporal Traffic Contour Maps Using Digital Image Analysis Procedures, Prashanth Kotha

LSU Master's Theses

The main focus of this study is to improve the data analysis tools used in performance monitoring and level of service assessment of freeway systems. The proposed study presents a methodology to develop new second-order statistical measures that are derived from texture characterization techniques in the field of digital image analysis. The new measures are capable of extracting properties such as smoothness, homogeneity, regularity, and randomness in traffic behavior from the spatio-temporal traffic contour maps. To study the new performance measures a total of 14270, 15-min traffic contour maps were generated for a section of 3.4 miles of I-4 in …

Go to article

The Perceptions Of Effects Of A Study Skills Course, "Dynamics Of Effective Study," On The Academic Achievement Of African American Students At A Dedicated Academic Magnet High School, Josephine Ann Allen Jan 2003

The Perceptions Of Effects Of A Study Skills Course, "Dynamics Of Effective Study," On The Academic Achievement Of African American Students At A Dedicated Academic Magnet High School, Josephine Ann Allen

LSU Doctoral Dissertations

The purpose of this study was to examine the perceptions of students, teachers, and administrators on the effectiveness of a study skills course, "Dynamics of Effective Study," on the academic achievement of African American students at a dedicated academic magnet high school. Qualitative research methods were utilized in this study. Fifteen African American students who completed the study skills course, fifteen African American students who did not take or complete the study skills course, five former study skills teachers, and three administrators from the dedicated academic magnet high school volunteered to participate in the study. Open-ended interviews were conducted with …

Go to article

Notes On Eryx, Omega, And Ata, Victor Fet Jan 2003

Notes On Eryx, Omega, And Ata, Victor Fet

Biological Sciences Faculty Research

Observations on several Nabokov’s works (Pale Fire, Lolita) where geographic or zoological names provide sources for puns and hidden parallels.

Go to article

Teaching The Early Female Canon: Gothic Feminism In Wollstonecraft, Radcliffe, Austen, Dacre, And Shelley, Diane Hoeveler Jan 2003

Teaching The Early Female Canon: Gothic Feminism In Wollstonecraft, Radcliffe, Austen, Dacre, And Shelley, Diane Hoeveler

English Faculty Research and Publications

No abstract provided.

Go to article

Influence Of Adjunct Use Andcheese Microenvironment On Nonstarter Lactic Acid Bacteria Populations In Cheddar-Type Cheese, Jeff Broadbent, K. Houck, M. E. Johnson, C. J. Oberg Jan 2003

Influence Of Adjunct Use Andcheese Microenvironment On Nonstarter Lactic Acid Bacteria Populations In Cheddar-Type Cheese, Jeff Broadbent, K. Houck, M. E. Johnson, C. J. Oberg

Nutrition, Dietetics, and Food Sciences Faculty Publications

This study investigated population dynamics of starter, adjunct, and nonstarter lactic acid bacteria (NSLAB) in reduced-fat Cheddar and Colby cheese made with or without a Lactobacillus casei adjunct. Duplicate vats of cheese were manufactured and ripened at 7°C. Bacterial populations were monitored periodically by plate counts and by DNA fingerprinting of cheese isolates with the random amplified polymorphic DNA technique. Isolates that displayed a unique DNA fingerprint were identified to the species level by partial nucleotide sequence analysis of the 16S rRNA gene. Nonstarter biota in both cheese types changed over time, but populations in the Colby cheese showed a …

Go to article

Front Matter, Farms Review Jan 2003

Front Matter, Farms Review

Review of Books on the Book of Mormon 1989–2011

No abstract provided.

Go to article

Optimizing Parameters For Efficient Introduction Of Transgenes Into Turfgrass, Chhandak Basu Jan 2003

Optimizing Parameters For Efficient Introduction Of Transgenes Into Turfgrass, Chhandak Basu

Open Access Dissertations

Embryogenic callus was generated from seeds of turfgrass species (creeping bentgrass, cv. Penn A4 and Providence) on tissue culture medium. After 12 weeks, embryogenic calli were identified and used for bombardment with chimeric gene constructs that confer phosphinothricin resistance (bar) as a selectable marker and β-glucuronidase (GUS) as a reporter gene. After bombardment, the calli were transferred to selection medium and then to regeneration medium. Putative transgenic turfgrass plants were generated and molecular analysis (PCR) was performed to confirm presence of the transgene (bar, GUS). We analyzed reporter gene (GUS) expression in turfgrass cells over a developmental time period of …

Go to article

Sources, Transport, And Fates Of Particulate Trace Metals In The Gulf Of Maine-Scotian Shelf And Labrador Sea, Sarah Elizabeth Weinstein Jan 2003

Sources, Transport, And Fates Of Particulate Trace Metals In The Gulf Of Maine-Scotian Shelf And Labrador Sea, Sarah Elizabeth Weinstein

Open Access Dissertations

This dissertation research describes three studies examining of the role of particulate metals in the northwest Atlantic Ocean. Manuscript 1 provides a discussion of the distribution of a suite of size-fractionated particulate trace metals (Al, Fe, Sr, Ba, Mn, Pb, Cu, V, and Co) in the Gulf of Maine, Scotian Shelf and Labrador Sea. An important facet of this study is the demonstration that the Challenger Oceanic Systems and Services large-volume in-situ pump is a valuable tool for the collection of size-fractionated particulate metals in the marine environment. In Manuscript 2, an empirical approach to quantify the downward flux of …

Go to article

Neuronal Control Of Nematocyst Discharge In Hydra, A. A. Scappaticci Jr. Jan 2003

Neuronal Control Of Nematocyst Discharge In Hydra, A. A. Scappaticci Jr.

Open Access Dissertations

This dissertation research seeks to understand how the neuronal circuitry of the battery cell complex in hydra functions in order to accomplish the basic biological necessity of food acquisition through its effector organelles, the nematocysts. A behavioral assay was used to discharge individual nematocysts from the tentacles of Hydra vulgaris. Cnidocils were mechanically deflected using a piezoelectrically driven glass probe. Standard immunohistochemical methods were used to localize the N-methyl-D-aspartate receptor in hydras tissues. Desmonemes and stenoteles differentially responded to imposed forces on the cnidocil. Desmonemes discharged when the cnidocil was struck with a force of at least 3.7 × 10−3 …

Go to article

Population Structure And Genetics Of Longevity In A Colony Of Dog Guides, John B. Cole Jan 2003

Population Structure And Genetics Of Longevity In A Colony Of Dog Guides, John B. Cole

LSU Doctoral Dissertations

The objectives of this study were the description of changes in genetic diversity in a colony of dog guides since its founding, and the investigation of the genetics of longevity in that population. Two breeds of dog, German Shepherds (GS) and Labrador Retrievers (LR), were evaluated. There were rapid increases in average pairwise relationship in both breeds, although the average was approximately one-third higher in the GS population than in the LR population. A similar trend was observed for average inbreeding. In the current generation, relationship and inbreeding for all animals averaged 25.3% and 26.2% in GS and 15.5% and …

Go to article

Modeling A Mississippi River Diversion Into A Louisiana Wetland, Stephan Alexander Capps Jan 2003

Modeling A Mississippi River Diversion Into A Louisiana Wetland, Stephan Alexander Capps

LSU Master's Theses

Wetland loss has significant impacts. Numerous loss mechanisms have been hypothesized, and a greater number of solutions have been proposed. One proposed solution is to divert river water into a degraded area with the intent of increasing sedimentation, introducing nutrients, and/or decreasing salinity within the wetland. However, wetland hydraulics and hydrology are complex processes and any hydrologic modification may result in unintended consequences. Predicting these consequences can be problematic due to the complexity and difficulty associated with proper modeling of the hydraulics and topography. The primary objective of this study is to evaluate the suitability of established one- and two-dimensional …

Go to article

The Fate Of Nitrogen In The Marshland Upwelling System, Jeremy Fontenot Jan 2003

The Fate Of Nitrogen In The Marshland Upwelling System, Jeremy Fontenot

LSU Master's Theses

The Marshland Upwelling System (MUS) is an alternative method for coastal dwellers to treat their wastewater. Past studies have dealt with the removal of fecal pathogens from wastewater. However the objectives of this research were to: 1) evaluate the treatment capability of the MUS under high hydraulic loadings and cool temperatures with respect to CBOD5, TKN, TAN, NO2--N, NO3--N, TP, and PO4-P, and 2) determine the ideal flowrate and injection frequency to achieve satisfactory nitrogen removal without hydraulic failure. The artificial wastewater study was performed to evaluate the treatment of …

Go to article

A Role For Constitutive Pathogen Resistance5 In Promoting Cell Expansion In Arabidopsis Thaliana, Ginger Marie Brininstool Jan 2003

A Role For Constitutive Pathogen Resistance5 In Promoting Cell Expansion In Arabidopsis Thaliana, Ginger Marie Brininstool

LSU Doctoral Dissertations

Arabidopsis thaliana is a model organism used for genetic, molecular, and biochemical analyses of higher plant processes. Leaf hairs (trichomes) on the surface of Arabidopsis leaves are macroscopic single cells that develop by elaborate cell expansion and differentiation of the epidermis. Arabidopsis trichomes provide an excellent model to study plant cell expansion and differentiation and the cell cycle. Upon maturation, an Arabidopsis trichome becomes a branched, stellate structure with a highly birefringent cell wall. Arabidopsis mutants have been isolated that have trichomes that look glassy and have reduced birefringence. CONSTITUTIVE PATHOGEN RESISTANCE5 (CPR5) is a previously isolated Arabidopsis gene observed …

Go to article

A Comparative Analysis Of The Deterioration Rates Of Textiles And Their Role In Determining Postmortem Interval, Kellie Marie Gordon Jan 2003

A Comparative Analysis Of The Deterioration Rates Of Textiles And Their Role In Determining Postmortem Interval, Kellie Marie Gordon

LSU Master's Theses

A predominant problem that must be solved in the medico-legal field of forensic science is when death occurred. Accurate determination of postmortem interval (PMI) enables investigators to narrow the time frame of events for a case, a crucial step for law enforcement in forensic analysis. Multiple taphonomic variables affect the decay rate of the human body and the subsequent formation of PMI estimates. Employing a two-phased strategy, this study seeks to analyze the correlation between the deterioration rates of various fabric types in relation to determining the PMI of a forensic case. First, an analysis was completed based on a …

Go to article

Improvement Of Kenaf Yarn For Apparel Applications, Ting Zhang Jan 2003

Improvement Of Kenaf Yarn For Apparel Applications, Ting Zhang

LSU Master's Theses

The objectives of the research are to determine the impact of the retting methods and blending percentage on the properties of kenaf fiber as well as the yarns and fabrics that contain kenaf, and to analyze and characterize kenaf fiber and yarns and fabrics that contain kenaf in terms of physical properties, such as tensile strength, elongation, evenness, absorbency and surface characteristics. In this research, kenaf fiber bundles were treated by chemical methods and softened to improve fiber properties. The treated fibers then were blended with cotton having 0, 10%, 25%, and 50% blending ratio and spun into yarns with …

Go to article

Scalable Parallel Molecular Dynamics Algorithms For Organic Systems, Satyavani Vemparala Jan 2003

Scalable Parallel Molecular Dynamics Algorithms For Organic Systems, Satyavani Vemparala

LSU Master's Theses

A scalable parallel algorithm, Macro-Molecular Dynamics (MMD), has been developed for large-scale molecular dynamics simulations of organic macromolecules, based on space-time multi-resolution techniques and dynamic management of distributed lists. The algorithm also includes the calculation of long range forces using Fast Multipole Method (FMM). FMM is based on the octree data structure, in which each parent cell is divided into 8 child cells and this division continues until the cell size is equal to the non-bonded interaction cutoff length. Due to constant number of operations performed at each stage of the octree, the FMM algorithm scales as O(N). Design and …

Go to article

From Gamete Collection To Database Development: Development Of A Model Cryopreserved Germplasm Repository For Aquatic Species With Emphasis On Sturgeon, William Rittenhouse Wayman Jan 2003

From Gamete Collection To Database Development: Development Of A Model Cryopreserved Germplasm Repository For Aquatic Species With Emphasis On Sturgeon, William Rittenhouse Wayman

LSU Doctoral Dissertations

Development of a cryopreserved sperm repository could greatly benefit the study and recovery of endangered species. Currently, a national repository for endangered aquatic species does not exist. This dissertation addressed the development of methods for the creation of a model germplasm repository, which included methods to reduce bacterial contamination within sperm samples, verify sample identification, store sperm (refrigerated or cryopreserved), evaluate sperm quality before and after thawing, and maintain sample and broodstock information. Although these methods were developed for sturgeon, they could be adapted for any aquatic species. Accurate species identification of sperm samples is essential for an archival repository. …

Go to article

The Effects Of Composition And Processing Of Milk On Foam Characteristics As Measured By Steam Frothing, Michael Levy Jan 2003

The Effects Of Composition And Processing Of Milk On Foam Characteristics As Measured By Steam Frothing, Michael Levy

LSU Master's Theses

Steam frothing of milk is required to produce an acceptable foam for many espresso coffee drinks. Specific aspects of composition and processing may affect the foaming properties of milk. The aim of this study was to determine the effect of fat content, heat treatment, free fatty acid addition and storage time on the frothing properties of milk. The four treatments included: fat content (0.08% and 3.25%), pasteurization temperatures (171°F for 15 seconds and 210°F for 45 seconds), pre and post-pasteurization addition of lauric acid solution (0.0% and 2.0% of 0.5 M concentration) and storage time (1 and 10 days). For …

Go to article

Systematics Of The Western Lyresnake (Trimorphodon Biscutatus) Complex: Implications For North And Middle American Aridland Biogeography, Thomas James Devitt Jan 2003

Systematics Of The Western Lyresnake (Trimorphodon Biscutatus) Complex: Implications For North And Middle American Aridland Biogeography, Thomas James Devitt

LSU Master's Theses

The Western Lyresnake (Trimorphodon biscutatus) is found generally from the desert southwestern United States southward along the pacific lowland versant of Mexico to northwestern Costa Rica. This species exhibits substantial geographic variation in size, squamation, and color pattern across its range, and as such has had an unstable taxonomic history. I investigated populations of T. biscutatus representing currently and formerly recognized forms using both morphological and molecular methods to infer the evolutionary history of this widespread, polytypic taxon. Multivariate statistical analyses (principal components and discriminant analysis) of morphological data (432 specimens, 33 characters) yielded six statistically significantly different groups, consistent …

Go to article

Relative Costs Of Infill Vs. Suburban Residential Developments: A Case Study Of The Greater Baton Rouge Area, John Lawrence Brian Jan 2003

Relative Costs Of Infill Vs. Suburban Residential Developments: A Case Study Of The Greater Baton Rouge Area, John Lawrence Brian

LSU Master's Theses

Driven by the accumulation of vacated buildings along with the need to reconstruct vacant urban areas and neighborhoods, the need to establish infill as the primary means of development in the Baton Rouge Metropolitan area is apparent. As suburban tendencies have increased, the core of our city has diminished. The principles of smart growth and infill development have been created in response these very problems. The methods have proven successful nationwide, but is the process feasible in Baton Rouge area? The answer to this very question goes well beyond yes or no. Many variables must be evaluated; the positives and …

Go to article

Experimental Evaluation Of Temporal Particle Agglomeration And Metal Partitioning Of Urban Rainfall-Runoff, Aimee Ann Blazier Jan 2003

Experimental Evaluation Of Temporal Particle Agglomeration And Metal Partitioning Of Urban Rainfall-Runoff, Aimee Ann Blazier

LSU Master's Theses

Rainfall-runoff quantity and quality control presents unique challenges due to the complexity and variability of hydrology and rainfall-runoff chemistry as well as the variable nature of constituent-producing processes in the environment. This study investigates two fundamental processes in rainfall-runoff: temporal particle agglomeration and metal partitioning between the solid and aqueous phase. A series of rainfall-runoff events were captured at an urban, Portland concrete cement (PCC) paved site in Baton Rouge, Louisiana and characterized with respect to particle gradation and metal phase fractions (dissolved and particulate) over time from a well-mixed, batch experimental system. Results indicate that equilibria and kinetics of …

Go to article

Wood Laminated Composite Poles, Cheng Piao Jan 2003

Wood Laminated Composite Poles, Cheng Piao

LSU Doctoral Dissertations

Wood composite poles are new engineered products with polygonal shapes and bonded with synthetic resins. The poles have multiple advantages over the solid wood poles and are a promising solid pole substitute in power transmission, telecommunication, and cable TV services. The use of composite poles may reduce the cost both in materials and manipulation, and facilitate installation and treatment. It is necessary to evaluate the factors that affect their properties and construct theoretical and analytical models to analyze these properties. Experiments were conducted to investigate strip thickness and number of strips’ (NOS) effects on the flexural properties and shear stress …

Go to article

Carbonic Anhydrase And Carbonic Anhydrase Like Genes Of Chlamydomonas Reinhardtii, Mautusi Mitra Jan 2003

Carbonic Anhydrase And Carbonic Anhydrase Like Genes Of Chlamydomonas Reinhardtii, Mautusi Mitra

LSU Doctoral Dissertations

Carbonic anhydrase (CA) is a zinc containing metalloenzyme that catalyzes the reversible interconversion of CO2 and HCO3-. There are three evolutionarily unrelated CA families designated alpha, beta and gamma CA. Vertebrates have members of the alpha CA family, while higher plants, algae and cyanobacteria have members belonging to all three CA families. In the green alga, Chlamydomonas reinhardtii, five CAs have previously been identified including three alpha CAs and two beta CAs. This dissertation describes the identification and characterization of new CA genes from C. reinhardtii. Four new CA or CA like genes have been discovered including two beta CAs …

Go to article

An Ecopath/Ecosim Analysis Of An Estuarine Food Web: Seasonal Energy Flow And Response To River-Flow Related Perturbations, Laura Lynette Althauser Jan 2003

An Ecopath/Ecosim Analysis Of An Estuarine Food Web: Seasonal Energy Flow And Response To River-Flow Related Perturbations, Laura Lynette Althauser

LSU Master's Theses

Estuaries are often the receiving basins for major river systems which makes them vulnerable to anthropogenic influences. I used Ecopath and Ecosim to investigate the structure of the Weeks Bay, Alabama, USA food web, and the responses of the food web to bottom-up perturbations. Four season-specific steady-state Ecopath models were developed and used to compare the production, biomass, consumption, biomass flows, and higher order indices of ecosystem functioning of the Weeks Bay food web under winter, spring, summer, and fall conditions. The season-specific Ecopath snapshots indicated that the structure of the Weeks Bay food web was resilient. Winter had the …

Go to article

Exedra: Form And Function In The Landscape, Daniel W. Mcelmurray Jan 2003

Exedra: Form And Function In The Landscape, Daniel W. Mcelmurray

LSU Master's Theses

This study resulted in the development of design guidelines used to create a contemporary exedra, in relationship to commemoration in the landscape. Through research and field investigation, an assessment of forms, materials, uses and locational characteristics of the exedra provides an understanding of the dynamics of the relationships between the elements of the exedra. By understanding the historical and commemorative nature of the exedra, landscape architects can utilize the form to create freestanding or structurally-integrated exedral forms as a solution to the identified need for the development of human-scale, urban places which commemorate people, places, and events.

Go to article

Treatment Of Chlorinated Volatile Organic Compounds Using Wetland Systems, Gabriel Roderick Kassenga Jan 2003

Treatment Of Chlorinated Volatile Organic Compounds Using Wetland Systems, Gabriel Roderick Kassenga

LSU Doctoral Dissertations

Bench-scale continuous vertical flow column and microcosm studies were conducted to investigate the attenuation potential of chlorinated volatile organic compounds (CVOCs) in constructed wetland soil mixtures prepared from peat, compost and sand and in a pristine natural freshwater wetland soil. The study also determined geotechnical properties of potential synthetic peat mixtures for construction of treatment wetlands for CVOCs. Trichloroethene (TCE), cis-1,2-dichloroethene (cis-1,2-DCE) and 1,2-dichloroethane (1,2-DCA) were the main test chemicals used during the studies. Based on geotechnical and sorption characteristics, two mixtures (one comprised of sand and peat and the other comprised of sand, peat and compost product) were selected …

Go to article

Agronomic And Molecular Characterization Of Louisiana Native Spartina Alterniflora Accessions, Alicia Beatriz Ryan Jan 2003

Agronomic And Molecular Characterization Of Louisiana Native Spartina Alterniflora Accessions, Alicia Beatriz Ryan

LSU Doctoral Dissertations

Coastal erosion and wetland deterioration are serious and widespread problems affecting Louisiana’s coastal zone. The application of agronomic and molecular techniques for improving crop species is well documented. However, these have not been routinely applied to species of ecological and environmental value. Spartina alterniflora is used extensively for shoreline protection and tidal marsh restoration because of its aggressive spreading habit and tolerance to salinity. The progress of marsh revegetation projects is limited by the costs and labor associated with vegetative propagation of Spartina. Hence, a breeding program was initiated to develop improved smooth cordgrass accessions with superior seed producing ability …

Go to article

Optimizing Aconitate Removal During Clarification, Niconor Nocony Reece Jan 2003

Optimizing Aconitate Removal During Clarification, Niconor Nocony Reece

LSU Master's Theses

The inadequate removal of aconitic acid from sugar cane juice during the clarification process results in the acid contributing to processing difficulties, sucrose loss and extended down time. However, very few attempts have been made to remove the acid during normal factory operations. Batch clarification techniques were used in this study to investigate the effect of sucrose concentration, temperature, pH, time, defecant, and defecant concentration on aconitic acid removal from a synthetic juice solution. Methodology for determining the significance of each parameter to aconitic acid removal involved setting up a multiple factorial experiment looking at aconitic acid removal across all …

Go to article

Developing Risk Assessment Maps For Schistosoma Haematobium In Kenya Based On Climate Grids And Remotely Sensed Data, Kelsey Lee Mcnally Jan 2003

Developing Risk Assessment Maps For Schistosoma Haematobium In Kenya Based On Climate Grids And Remotely Sensed Data, Kelsey Lee Mcnally

LSU Master's Theses

It is important to be able to predict the potential spread of water borne diseases when building dams or redirecting rivers. This study was designed to test whether the use of a growing degree day (GDD) climate model and remotely sensed data (RS) within a geographic information system (GIS), could be used to predict both the distribution and severity of Schistosoma haematobium. Growing degree days are defined as the number of degrees centigrade over the minimum temperature required for development. The base temperature and the number of GDD required to complete one generation varies for each species. A monthly climate …

Go to article

Studies On Rice Transformation And The Use Of Transformed Plants [Electronic Resource], Qiming Shao Jan 2003

Studies On Rice Transformation And The Use Of Transformed Plants [Electronic Resource], Qiming Shao

LSU Doctoral Dissertations

This research was conducted to enhance utilization of the Liberty herbicide resistance transgene in rice. Non-lethal methods to determine the sensitivity of transgenic rice plants to hygromycin B and Liberty were developed, tested and used in this research. Four homozygous transformed plants were selected to make reciprocal crosses with their non-transformed parent cultivars Taipei 309 and Nipponbare. Their resistances to Liberty and hygromycin B were controlled by the closely linked single dominant genes bar and hpt. Some non-resistant phenotypes in the F2 populations were due to gene silencing. The bar gene in some of these plants were allelic and some …

Go to article

First Prev Next Last