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Articles 22861 - 22890 of 23098
Full-Text Articles in Entire DC Network
Evaluation Of Compliance With The Long Term 1 Enhanced Surface Water Treatment Rule, Racquel Rena Douglas
Evaluation Of Compliance With The Long Term 1 Enhanced Surface Water Treatment Rule, Racquel Rena Douglas
LSU Master's Theses
Cryptosporidium is a common protozoan parasite that causes cryptosporidiosis, a severe gastrointestinal disease. Currently, there is no antibiotic available to treat the disease. Cryptosporidium has been responsible for several waterborne disease outbreaks in the United States. The largest cryptosporidiosis outbreak in United States history occurred in Milwaukee, Wisconsin in spring 1993. The vulnerability of the United State drinking water supply to waterborne disease outbreak is still prevalent nearly 15 years after the Milwaukee outbreak. In order to effectively control Cryptosporidium, the EPA has strengthened the regulations on turbidity control for filtration performance by implementing the Long Term 1 Enhanced Surface …
Evaluation Of Consolidation Parameters Of Cohesive Soils Using Pcpt Method, Rohit Raj Pant
Evaluation Of Consolidation Parameters Of Cohesive Soils Using Pcpt Method, Rohit Raj Pant
LSU Master's Theses
The piezocone penetration test (PCPT) has emerged as most widely used in situ method for obtaining soil profile as well as physical properties. The PCPT method provides three independent and nearby continuous measurements with the depth; they are: tip stress (qc), sleeve friction (fs) and pore pressure (u1, u2, or u3). These measurements have been successfully used to correlate various soil properties such as undrained shear strength, unit weight and consolidation parameters. This study presents the evaluation of the PCPT interpretation methods for their capability to reasonably estimate the consolidation parameters namely constrained modulus, overconsolidation ratio and vertical coefficient of …
Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert Hon-Yu Lee
Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert Hon-Yu Lee
LSU Doctoral Dissertations
Red imported fire ants (RIFA), Solenopsis invicta Buren, are medical, urban, and agricultural pests from South America. Fourth-instar larvae are used by the colony to digest solid food and then regurgitate it for consumption by workers and queens. Larvae are an ideal source of investigations of obligate endosymbiotic bacteria possibly involved in nutrient distributions. I attempted to first identify what bacteria species are in the guts of larvae followed by antibiotic and microscopy work to further study their roles in the ants. The composition of the bacterial community in fire ant larvae was described with culture-independent methods utilizing 16S rDNA …
Dragons Behind Glass: Views Of China And Japan In Three American Museums, Kristina Elaine Polizzi
Dragons Behind Glass: Views Of China And Japan In Three American Museums, Kristina Elaine Polizzi
LSU Master's Theses
This thesis will focus on three museums: the American Museum of Natural History in New York, New York, the Mobile Museum of Art in Mobile, Alabama and the Morikami Museum in Del Ray Beach, Florida. Overall the museums took surprisingly different approaches to designing their exhibits. The American Museum of Natural History gave a general overview of Japan and China. The Mobile Museum of Art focused only on pottery and the Morikami Museum focused on the Japanese immigrants that settled in Del Ray Beach. Differences and similarities of these museums and what these exhibits tell the viewer about the two …
Turbulence Modeling For Film Cooling Flows, Asif Hoda
Turbulence Modeling For Film Cooling Flows, Asif Hoda
LSU Doctoral Dissertations
An improved two equation turbulence model has been developed in this dissertation to better predict the complex film cooling flow field that is formed from the interaction of a coolant jet and a crossflow over a modeled turbine blade surface. Film cooling of turbine blades is commonly employed to effectively protect turbine blades from thermal failure and thereby to allow higher inlet temperatures in order to increase the efficiency of gas turbine engines. Film cooling involves the injection of rows of coolant jets from slots on the surface of a turbine blade which is then bent over by the crossflow …
African Art Music For Flute: A Study Of Selected Works By African Composers, Wendy Kristin Hymes Onovwerosuoke
African Art Music For Flute: A Study Of Selected Works By African Composers, Wendy Kristin Hymes Onovwerosuoke
LSU Doctoral Dissertations
Recent years have witnessed an increase in the number of Western classical music performers actively programming works employing multi-cultural musical idioms. Though there exist many compositions by African composers, African art music is not often programmed by Western performers because of the lack of exposure these compositions have received, lack of commercially-available recordings, and the difficulties of obtaining information about African musical styles. The information presented in this research aims to aid performers in their preparation and approach to performing African art music compositions, specifically those for the western flute. This research includes biographical information and compositional philosophies of five …
Eigenvalue Optimization And Its Applications In Buckling And Vibration, Srinivas Gopal Krishna
Eigenvalue Optimization And Its Applications In Buckling And Vibration, Srinivas Gopal Krishna
LSU Doctoral Dissertations
Eigenvalue problems are of immense interest and play a pivotal role not only in many fields of engineering but also in pure and applied mathematics. An in-depth understanding of this class of problems is a pre-requisite for vibration and buckling analyses of structures. Design optimization of structures to prevent failure due to instability (bucking) and vibration introduces the problem of determining optimal physical parameters such that load carrying capacity or the fundamental natural frequency is maximized. A classical example of such problems is the Lagrange problem of determining the shape of the strongest column against buckling. The primary objective of …
Balch Internet Research And Analysis Tool Development Case Study, Charles V. Balch
Balch Internet Research And Analysis Tool Development Case Study, Charles V. Balch
LSU Doctoral Dissertations
The Internet has become increasing popular as a vehicle to deliver surveys. An essential objective of research is to collect accurate data and there has been little work to insure that Internet survey systems are employing best practices as defined by academic and professional research to collect data. My dissertation reviews the current literature relating to best practices in Internet survey design and best practices in software design and development. I then document the development and deployment of an Open Source and publicly licensed Internet survey system that allows researchers to easily create, deploy, and analyze the results of Internet …
The Relationship Of Selected Personal Characteristics Of E-Faculty To Their Perceived Technological Knowledge, Myriah Christin Clark
The Relationship Of Selected Personal Characteristics Of E-Faculty To Their Perceived Technological Knowledge, Myriah Christin Clark
LSU Doctoral Dissertations
This study investigated the technological development of e-faculty at five randomly selected Carnegie classified (2006) Doctorate-Granting Research Universities with very high research activity (RU/VH) in the Southern Regional Education Board (SREB). The majority of e-faculty report that they do not have release time/reduced teaching load for preparing web-based materials/courses, nor do they have graduate or teaching assistants available for assisting with web-based learning. However, a little over half of them reported having instructional designers or curriculum developers to help with the designing of web-based materials and a large majority reported having adequate institutional research resources (library holdings that are accessible …
Characterization Of A Virulence Related Hypothetical Protein In Edwardsiella Ictaluri, Ildiko Katalin Polyak
Characterization Of A Virulence Related Hypothetical Protein In Edwardsiella Ictaluri, Ildiko Katalin Polyak
LSU Master's Theses
Although the biochemical characterization of E. ictaluri, the subsequent disease progression of enteric septicemia of catfish (ESC), and the associated pathologic lesions are well characterized, the mechanism of invasion of E. ictaluri into a susceptible host is poorly understood. Identification and confirmation of virulence factors and associated genes of E. ictaluri is crucial to elucidating the pathogenesis of this important disease. A signature tagged mutagenesis (STM) study conducted by Thune et al. (2006) identified 50 E. ictaluri clones with transposon insertions in genes potentially involved in pathogenesis. A specific STM mutant, 233PR, carrying a transposon insertion in a gene encoding …
Population Ecology Of Pseudacteon Tricuspis Borgmeier (Diptera: Phoridae), An Introduced Parasitoid Of The Red Imported Fire Ant Solenopsis Invicta Buren (Hymenoptera: Formicidae) In Louisiana, Donald Charles Henne
Population Ecology Of Pseudacteon Tricuspis Borgmeier (Diptera: Phoridae), An Introduced Parasitoid Of The Red Imported Fire Ant Solenopsis Invicta Buren (Hymenoptera: Formicidae) In Louisiana, Donald Charles Henne
LSU Doctoral Dissertations
Aspects of the population ecology of a parasitoid (Pseudacteon tricuspis) of the red imported fire ant (Solenopsis invicta) in Louisiana were studied. The spatio-temporal abundance patterns, dispersal, population spread, aggregation, direct mutual interference and functional response characteristics of this parasitoid were studied to address deficiencies in our knowledge about phorid flies, particularly Pseudacteon parasitoids. This endoparasitoid was discovered to manipulate host ant behavior in ways that benefit its own survival. Laboratory experiments to gain insights into behavioral and functional responses revealed that fly aggregations were density-dependent and interference was not significant when 1-3 females were simultaneously confined with hosts, although …
Multidimensionality Of Partisan Identification Revisited, Amanda Swanner
Multidimensionality Of Partisan Identification Revisited, Amanda Swanner
LSU Master's Theses
In this paper I retest the assertion that party identification is multidimensional by using the 2000 American National Election Survey. Variables relevant to partisanship are used to examine how voters connect their evaluations of the two parties. The findings support the theory of multidimensionality. The data show that the multidimensional conceptualization of party identification is better for understanding the attitudes and behavior of partisans.
Parenting Experiences Of Eastern European Immigrant Professionals In The U.S.: A Qualitative Study, Olena Nesteruk
Parenting Experiences Of Eastern European Immigrant Professionals In The U.S.: A Qualitative Study, Olena Nesteruk
LSU Doctoral Dissertations
In 2004, the nation’s foreign-born population numbered approximately 35 million comprising about 12% of the total U.S. population (U.S. Census Bureau, 2005). Most studies of immigrants primarily research the two largest immigrant groups, those from Latin America and Asia, while little has been done with the less visible population of immigrants from Eastern Europe. Also, we know much about the experiences of low-income immigrants of color, but little about the experiences of white immigrant families in the professional ranks. A qualitative study was conducted with immigrant professionals from Eastern Europe to explore their experiences with raising children in a new …
Analysis Of Miocene Stratigraphy And Sedimentology In The Ross Sea, Antarctica: A First Order Test Of Proxy Based Climate Interpretations, Samuel Gray
LSU Master's Theses
During the Cenozoic, the climate progressed from global warmth into an icehouse world. This study investigates the links between the development of the climate and cryosphere using sediment flux and stratal geometries. The current polar conditions are characterized by dry basal conditions, which due to minimal melt water produce significantly less sediment than their temperate counterparts. Therefore, the transition from temperate to polar conditions should have resulted in marked decrease in sediment flux and change in stratal geometries in adjacent marine margins. Regional seismic stratigraphic evidence clearly suggests that ice has been intermittently grounded on the Ross Sea outer continental …
Displacement And The Text: Exploring Otherness In Jean Rhys' Wide Sargasso Sea, Maryse Condé'S La Migration Des Coeurs, Rosario Ferré'S The House On The Lagoon, And Tina De Rosa's Paper Fish, Melody Boyd Carriere
Displacement And The Text: Exploring Otherness In Jean Rhys' Wide Sargasso Sea, Maryse Condé'S La Migration Des Coeurs, Rosario Ferré'S The House On The Lagoon, And Tina De Rosa's Paper Fish, Melody Boyd Carriere
LSU Doctoral Dissertations
This dissertation is a study of how some displaced Caribbean and Italian American women examine identity within a literary tradition that considers them "Other." I have chosen four culturally diverse novels to explore, each one written by a different female author: Jean Rhys' Wide Sargasso Sea, Maryse Condé's La migration des cœurs, Rosario Ferré's The House on the Lagoon, and Tina De Rosa's Paper Fish. I identify the causes of the protagonists' displacement, and analyze the actions they take to make themselves heard in a tradition that has formerly silenced them. The role of the mother is especially important in …
Film Cooling From A Row Of Holes Supplemented With Anti Vortex Holes, Alok Dhungel
Film Cooling From A Row Of Holes Supplemented With Anti Vortex Holes, Alok Dhungel
LSU Master's Theses
Film cooling is a technique employed to protect the external surface of gas turbine blades from the hot mainstream gas by ejecting the internal coolant air through discrete holes or slots at several locations on the blade exterior surface. Passing the coolant through conventional cylindrical holes causes a pair of vortices to form which lifts off the coolant jet instead of letting it adhere to the surface. The present study aims at investigating the enhanced cooling performance caused by addition of anti-vortex holes to the main cylindrical film cooling holes. Both heat transfer coefficient and film cooling effectiveness are determined …
Using Power Spectra To Look For Anisotropies In Ultra-High Energy Cosmic Ray Distributions, Megan Alicia Mcewen
Using Power Spectra To Look For Anisotropies In Ultra-High Energy Cosmic Ray Distributions, Megan Alicia Mcewen
LSU Doctoral Dissertations
The origins and compositions of ultra-high energy cosmic rays (UHECR) remains a mystery to this day. The Pierre Auger Observatory (PAO) is being constructed now in the hopes that it will help solve this mystery by detecting more UHECR than any previous experiment. In this dissertation, I will discuss this experiment, and analyze the data collected so far by comparing it with simulated data from possible source distributions. In these simulations, I will track antiprotons, along with other possible cosmic ray primaries, through various models of galactic and extragalactic magnetic fields. Once they reach a certain distance, I will record …
Xanthene/Benzoxanthene Dyes: Novel Synthetic Metholologies, Applications In Molecular Recognition, Cellular Imaging And The Design Of A Tunable White (Rgb) Light Emitter, Youjun Yang
LSU Doctoral Dissertations
My graduate work has focused on the development of new fluorophore materials towards addressing several interdisciplinary research problems. Selective detection of sialic acid via a boron-amide interaction. Concentration changes of sialic acid can be monitored ratiometrically in the visible region using a boronic acid based chemosensor. The technique shows great promise for the detection of sialic acid, a critical cell surface residue involved in cancer, graft rejection and virulence in certain bacteria. There is no interference from commonly occurring oligosaccharides, aminosugars and most carboxylic acid-containing compounds. Improved synthetic methodology and studies of novel molecular probe architectures. I have developed a …
Computer-Aided Weld Inspection By Fuzzy Modeling With Selected Features, Sean Najm Ghazavi
Computer-Aided Weld Inspection By Fuzzy Modeling With Selected Features, Sean Najm Ghazavi
LSU Master's Theses
This thesis develops a computer-aided weld inspection methodology based on fuzzy modeling with selected features. The proposed methodology employs several filter feature selection methods for selecting input variables and then builds fuzzy models with the selected features. Our fuzzy modeling method is based on a fuzzy c-means (FCM) variant for the generation of fuzzy terms sets. The implemented FCM variant differs from the original FCM method in two aspects: (1) the two end terms take the maximum and minimum domain values as their centers, and (2) all fuzzy terms are forced to be convex. The optimal number of terms and …
Accuracy Of Cranial Coplanar Beam Therapy With Brainlab Exactrac Image Guidance, Justin Vinci
Accuracy Of Cranial Coplanar Beam Therapy With Brainlab Exactrac Image Guidance, Justin Vinci
LSU Master's Theses
Purpose: To develop a system for measuring 2D dose distributions in the cranium and to use this system to evaluate the accuracy of coplanar conformal therapy using ExacTrac image guidance. Methods: Techniques were developed to measure dose distributions in each principal plane using a CIRS anthropomorphic head phantom with a custom internal film cassette. Sections of EDR2 film were cut, processed, and digitized using custom templates. Spatial and dosimetric accuracy and precision of the film system was assessed. BrainScan was used to plan a coplanar-beam treatment conforming to irradiate a 2-cm diameter x 2-cm cylindrical target. Prior to delivery phantom …
Using Least-To-Most Assistive Prompt Hierarchy To Increase Chilld Compliance With Directives In An Inclusive Preschool Classroom, Jamie Lynn Ourso
Using Least-To-Most Assistive Prompt Hierarchy To Increase Chilld Compliance With Directives In An Inclusive Preschool Classroom, Jamie Lynn Ourso
LSU Master's Theses
Prompt strategies have been used in the literature to increase the compliance of preschool-aged children to teacher directives (Wilder & Atwell, 2006; Wolery & Gast, 1984). The purpose of this study was to train teachers to use guidance/prompt strategies to increase child compliance with teacher directives related to play and social skills. This study builds on the current literature base by using prompting, specifically the least-to-most assistive prompt hierarchy (LtM) (first described by Horner & Keilitz, 1975), with the additional requirement of teacher-child proximity and teacher-child eye level prior to beginning the prompt sequence. These two additional requirements are consistent …
Knowledge-Based Methods For Automatic Extraction Of Domain-Specific Ontologies, Janardhana R. Punuru
Knowledge-Based Methods For Automatic Extraction Of Domain-Specific Ontologies, Janardhana R. Punuru
LSU Doctoral Dissertations
Semantic web technology aims at developing methodologies for representing large amount of knowledge in web accessible form. The semantics of knowledge should be easy to interpret and understand by computer programs, so that sharing and utilizing knowledge across the Web would be possible. Domain specific ontologies form the basis for knowledge representation in the semantic web. Research on automated development of ontologies from texts has become increasingly important because manual construction of ontologies is labor intensive and costly, and, at the same time, large amount of texts for individual domains is already available in electronic form. However, automatic extraction of …
Building A Better Mousetrap, Jonathan Pellitteri
Building A Better Mousetrap, Jonathan Pellitteri
LSU Master's Theses
ABSTRACT To me the phrase “building a better mousetrap” implies that a needless change has been made to something that already sufficiently serves its purpose. These words identify my thoughts about how over the past three years I have begun to replace trusted means of communication with newer technologies. My thesis work examines my relationship to these new modes of communication and how, as I see others around me making them useful parts of their lives, I am continually snared by the promise of their convenience. Ultimately, however, they distract and frustrate me with the countless hours I allow them …
Early Flotant Establishment And Growth Dynamics In A Nutrient Amended Wetland In The Lower Mississippi River Delta, Caleb W. Izdepski
Early Flotant Establishment And Growth Dynamics In A Nutrient Amended Wetland In The Lower Mississippi River Delta, Caleb W. Izdepski
LSU Master's Theses
Nutrient dynamics and seasonal marsh growth were examined in a newly formed Panicum virgatum floating marsh at Thibodaux LA. The floating marsh formed in a cleared area of forested wetland receiving secondarily treated effluent. Net Areal Primary Productivity (NAPP), total belowground biomass, NO3, and δ15N ratios varied significantly (P <0.05) along a 75m marsh transect while mean δ13C varied between plant species. The upland end of the transect had the highest NAPP (3876 g m-2y-1), total belowground biomass (4079.0 ± 298.5 g m-2), and mean NO3 (5.4 ± 2.9 mg l-1). The mean floating-marsh …0.05)>
Phylogenetic Systematics, Biogeography, And Evolutionary Ecology Of The True Crocodiles (Eusuchia: Crocodylidae: Crocodylus), Jamie Richard Oaks
Phylogenetic Systematics, Biogeography, And Evolutionary Ecology Of The True Crocodiles (Eusuchia: Crocodylidae: Crocodylus), Jamie Richard Oaks
LSU Master's Theses
Modern crocodylian systematics has been dominated by investigations of higher-level relationships aimed at resolving the disparity between morphological and molecular data, especially regarding the true gharial (Gavialis). Consequently, no studies to date have provided adequate resolution of the interspecific relationships within the most broadly distributed, ecologically diverse, and species-rich crocodylian genus, Crocodylus. In this study, Bayesian and ML partitioned phylogenetic analyses were performed on a DNA sequence dataset of 7,282 base pairs representing four mitochondrial regions, nine nuclear loci, and all 23 crocodylian species. The analyses were performed on a suite of partitioning strategies to investigate the modeling effects of …
An Analysis Of The Processor Preferences For The Adoption Of Potential Crawfish Peeling Machines, Darius J. Lewis
An Analysis Of The Processor Preferences For The Adoption Of Potential Crawfish Peeling Machines, Darius J. Lewis
LSU Master's Theses
Over the past decade, the peeling segment of the Louisiana crawfish industry has faced the challenge of remaining competitive in an increasingly global market. Since the mid-1990’s, there has been escalated discussion among Louisiana crawfish processors on the need for a crawfish peeling machine. The International Trade Commission determined that the U.S. crawfish industry had been “materially injured” by the imported tailmeat and ruled China was, in fact, dumping crawfish in the U.S. by selling below fair market value in the host country. The development of a suitable crawfish peeling machine could potentially increase production and lower cost of production, …
An Exploration Of The Impact Of Picture Book Illustrations On The Comprehension Skills And Vocabulary Development Of Emergent Readers, Judy Lavender Nicholas
An Exploration Of The Impact Of Picture Book Illustrations On The Comprehension Skills And Vocabulary Development Of Emergent Readers, Judy Lavender Nicholas
LSU Doctoral Dissertations
The formal instruction process of teaching reading to emergent and beginning readers needs to incorporate a much more multimodal approach. People today, not only in America but in many other countries as well, are more graphically oriented than any other generation has ever been. Children in our society expect to experience pictures and images in almost everything they encounter. This graphic orientation needs to be taken advantage of and incorporated into the educational process in ways that can be beneficial to the learning environments of children in our schools. Reading programs need to forego one-dimensional teaching methods and learn how …
Low Crude Protein, Amino Acid-Supplemented Diets, And The Glycine Requirement In Low Crude Protein Diets For Broilers, April Marie Waguespack
Low Crude Protein, Amino Acid-Supplemented Diets, And The Glycine Requirement In Low Crude Protein Diets For Broilers, April Marie Waguespack
LSU Master's Theses
The purpose of this research was to determine the optimal level of crystalline amino acid (AA) supplementation that supports maximum growth performance in broilers, and to determine the Gly requirement in broilers. Treatments were replicated with a minimum of 7 pens with 6 broilers per pen. Experiments (Exp.) were conducted from 0- to 18- days (d) post-hatching in brooder batteries. Three Exp. were conducted to determine the maximum level of L-Lys•HCl that could be supplemented to corn-soybean meal (C-SBM) diets without negatively affecting growth performance of broilers. The results of these Exp. indicate that broilers can achieve maximum growth performance …
Computer Model Of Hybrid Compensator Of Fast Varying Loads, Veronica Bohorquez
Computer Model Of Hybrid Compensator Of Fast Varying Loads, Veronica Bohorquez
LSU Doctoral Dissertations
A computer model of the hybrid compensator of fast varying loads was developed in this dissertation. The computer model was implemented in MFC Visual C++ compiler version 6.0. The classification of fast varying loads and effects of their operation in distribution systems were described in this dissertation. The power properties of fast varying loads were expressed in terms of the Currents' Physical Components Theory. Therefore, the Currents' Physical Components Theory was applied to systems with non-periodic voltages and currents. The supply current of the fast varying loads was decomposed into the useful and the useless components using an algorithm based …
Experimental Investigation Of Heat Transfer Rate In Micro-Channels, Pritish Ranjan Parida
Experimental Investigation Of Heat Transfer Rate In Micro-Channels, Pritish Ranjan Parida
LSU Master's Theses
Metal-based MHEs are of current interest due to the combination of high heat transfer performance and improved mechanical integrity. Efficient methods for fabrication and assembly of functional metal-based MHEs are essential to ensure the economic viability of such devices. The present study focuses on the results of heat transfer testing of assembled Cu- and Al- based microchannel heat exchanger (MHE) prototypes. Efficient fabrication of Cu- and Al- based high-aspect-ratio microscale structures (HARMS) have been achieved through molding replication using surface engineered, metallic mold inserts. Replicated metallic HARMS were assembled through eutectic bonding to form entirely Cu- and Al- based MHE …