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Block-Level Discrete Cosine Transform Coefficients For Autonomic Face Recognition, Willie L. Scott, Ii
Block-Level Discrete Cosine Transform Coefficients For Autonomic Face Recognition, Willie L. Scott, Ii
LSU Doctoral Dissertations
This dissertation presents a novel method of autonomic face recognition based on the recently proposed biologically plausible network of networks (NoN) model of information processing. The NoN model is based on locally parallel and globally coordinated transformations. In the NoN architecture, the neurons or computational units form distributed networks, which themselves link to form larger networks. In the general case, an n-level hierarchy of nested distributed networks is constructed. This models the structures in the cerebral cortex described by Mountcastle and the architecture based on that proposed for information processing by Sutton. In the implementation proposed in the dissertation, the …
The Extinction Properties Of Reddened Galactic Ob Sightlines, Lynne Angela Valencic
The Extinction Properties Of Reddened Galactic Ob Sightlines, Lynne Angela Valencic
LSU Doctoral Dissertations
A solid understanding of dust grains and their extinction properties is needed to better remove the effects of extinction from data and to comprehend the nature of the processes which modify grains. This requires a large sample of Galactic sightlines, extending far beyond the solar neighborhood, sampling not only a large volume of space but also a wide variety of environments. To fulfill this requirement, a database of sightlines toward 426 young, reddened stars was constructed using extinction curves based on IUE spectra. The curves were fit and the Fitzpatrick-Massa (FM) parameters were found. FM parameters allow for a quantitative …
Collective Efficacy: A Framework For Understanding Classroom Teacher's Perceptions Of Integrating Physical Activity, Melissa Ann Park
Collective Efficacy: A Framework For Understanding Classroom Teacher's Perceptions Of Integrating Physical Activity, Melissa Ann Park
LSU Doctoral Dissertations
Children’s physical inactivity is becoming an important health concern, and it has been suggested by professionals that school programs can be important in the effort to increase activity levels. Physical education specialists cannot achieve the goal of significantly increasing children’s activity in isolation, and it is apparent that whole school programs at the elementary level have the potential to foster active lifestyles. If those programs are to be successful, all school personnel must play a role, so it is important to find ways to facilitate their involvement. The purpose of this study was to use collective efficacy as a framework …
A Comparison Of Louisiana Secondary Career And Technical Teachers And Academic Teachers On Learning Type And Perception Of School Climate, Tracy Andries Beard
A Comparison Of Louisiana Secondary Career And Technical Teachers And Academic Teachers On Learning Type And Perception Of School Climate, Tracy Andries Beard
LSU Doctoral Dissertations
The purpose of this study was to investigate the relationship between Louisiana public secondary school teachers' primary learning type and teaching area; and the influence of learning type and teaching area on the teacher's perception of school climate. A total of 293 Louisiana public secondary school teachers participated in the study. An instrument with three parts was used to collect data for this study: demographics, Learning Type Measure and Organizational Health Inventory. Over two-thirds of the respondents were female. Mean age was 43 years and mean teaching experience was 16.41 years. Over three-fourths of respondents were white while over 50% …
Techniques To Explore Time-Related Correlation In Large Datasets, Sumeet Dua
Techniques To Explore Time-Related Correlation In Large Datasets, Sumeet Dua
LSU Doctoral Dissertations
The next generation of database management and computing systems will be significantly complex with data distributed both in functionality and operation. The complexity arises, at least in part, due to data types involved and types of information request rendered by the database user. Time sequence databases are generated in many practical applications. Detecting similar sequences and subsequences within these databases is an important research area and has generated lot of interest recently. Previous studies in this area have concentrated on calculating similitude between (sub)sequences of equal sizes. The question of unequal sized (sub)sequence comparison to report similitude has been an …
Factors Which Influence Faculty Attitudes And Perceptions Of Distance Education In Analytical Subject Areas, Jeffrey G. Sumrall
Factors Which Influence Faculty Attitudes And Perceptions Of Distance Education In Analytical Subject Areas, Jeffrey G. Sumrall
LSU Doctoral Dissertations
This study focuses on current faculty attitudes and perceptions of distance education. A thorough review of literature indicates that faculty members are critical elements of distance education delivery and that certain factors (tenure, departmental incentives, gender, age) influence faculty participation. The main hypothesis being investigated is whether or not the analytical nature of the course is in fact the prime indicator in faculty participation. Faculty members from three randomly chosen SREB member institutions were surveyed. The purpose for choosing SREB member institutions for the population was for generalizing the findings to higher education institutions throughout the Southeastern United States. The …
The Ligase Detection Reaction: The Evolution Of A Mutation Detection Strategy, Hannah D. Farquar
The Ligase Detection Reaction: The Evolution Of A Mutation Detection Strategy, Hannah D. Farquar
LSU Doctoral Dissertations
Early detection of genetic mutations is important for control of diseases such as cancer and Alzheimer's. Early detection requires methods that detect small amounts of mutated DNA in very large amounts of normal or wild type DNA. One method to detect mutated DNA is the ligase detection reaction (LDR). Since its inception LDR has evolved greatly from a simple detection reaction after PCR amplification to PCR/RE/LDR, a scheme which uses nucleoside base analogs in PCR to convert wild type sequences to sequences containing restriction endonuclease (RE) sites which can then be cleaved leaving only mutant sequences for detection by LDR. …
Molecular Dynamics Simulations Of Adhesion And Nanoidentation Of Gallium Arsenide, Francis Brent Neal, Jr.
Molecular Dynamics Simulations Of Adhesion And Nanoidentation Of Gallium Arsenide, Francis Brent Neal, Jr.
LSU Doctoral Dissertations
The purpose of this dissertation is to investigate the nanoscale hardness of gallium arsenide thin films and the elastic-plastic behavior of gallium arsenide under an indenter. These investigations were carried out using molecular dynamics (MD) simulations. The simulations are based on interatomic potentials that accurately reproduce many properties of bulk GaAs. The MD simulations performed required scalable and efficient algorithms for implementation on large parallel computers. Nanoindentation simulations were performed using an ideal indenter that was held rigid during the simulation. To reduce the transient effects due to loading, the traversal of the indenter was interrupted periodically to allow the …
Group Automorphisms And The Decomposition Of Plancherel Measures, David Slay
Group Automorphisms And The Decomposition Of Plancherel Measures, David Slay
LSU Doctoral Dissertations
In this paper, a natural action of the automorphisms of a group on the space of irreducible unitary representations is used to decompose the Plancherel measure on the dual space as an integral of measures on homogeneous spaces. Explicit decompositions are obtained for the cases of free 2 and 3-step nilpotent Lie groups. These results are obtained using direct integral decompositions, induced representations, the Mackey Machine, and measure theory on homogeneous spaces.
It Came From Outer Space: The Virus, Cultural Anxiety, And Speculative Fiction, Anne-Marie Thomas
It Came From Outer Space: The Virus, Cultural Anxiety, And Speculative Fiction, Anne-Marie Thomas
LSU Doctoral Dissertations
This study seeks to explore and interrogate the “viral reality” of the 1990s, in which the virus, heavily indebted to representations of AIDS for its metaphorical power, emerged as a prominent agent in science and popular culture. What becomes apparent in both fictional and non-fictional texts of this era, however, is that the designation of “virus” transcends specific and material viral phenomena, making the virus itself a touchstone for modern preoccupations with self and other. As constituted by the human body’s interaction with pathogenic agents, the binary of self and other may be deconstructed by an interrogation of the virus …
Nonlinear Dynamics In Nuclear Structure, Guergana Stoianova Stoitcheva
Nonlinear Dynamics In Nuclear Structure, Guergana Stoianova Stoitcheva
LSU Doctoral Dissertations
New collective coordinates that describe the deformation of atomic nuclei in terms of solitary waves (rotons) that are solutions of an underlying nonlinear liquid drop dynamics are introduced. The rotons, which are highly localized surface excitations, are shown to be intelligent states of an underlying angular momentum algebra, and furthermore, to adiabatically decouple from the rotational motion of the nucleus. An expansion of the roton profile in terms of surface multipoles shows that although the quadrupole mode (&lambda= 2) dominates, there are significant contributions from other even multipoles with &lambda= 4, 6, 8, etc. The picture of nuclear deformation that …
Adult-Mediated Reading Instruction For Third Through Fifth Grade Children With Reading Difficulties, Randy Paul Lachney
Adult-Mediated Reading Instruction For Third Through Fifth Grade Children With Reading Difficulties, Randy Paul Lachney
LSU Doctoral Dissertations
This dissertation examined the efficacy of using minimally trained college undergraduates to tutor third- through fifth-grade students with reading difficulties. Tutors receiving four hours of training in scripted reading program based on the principles of Direct Instruction and emphasizing explicit instruction in phonological awareness and decoding. Thirty-six students from two elementary schools in a large southeastern city in the United States were selected and randomly assigned to treatment (tutoring) or contrast (non-tutoring) conditions. Treatment students received an average of fourteen and a half hours of tutoring over a twelve-week period. Data indicated that university students with minimal training successfully implemented …
Piano Teaching Philosophies And Influences On Pianism At The Central Conservatory Of Music In Beijing, China, Chi Lin
LSU Doctoral Dissertations
The Central Conservatory of Music (CCOM) is considered the best music institute in China and represents the highest level of music education in China. Since the founding of the CCOM in 1950, its piano department has been a national center for teaching, performance and research. The CCOM has trained hundreds of pianists; many of them are now key members of music schools, art organizations, and research institutes all over China and some of them have won prizes at major international competitions. Through fifty years of efforts by Chinese pianists and the influences of foreign pianists, especially Russian pianists, the CCOM …
Racks, Quandles And Virtual Knots, Victor Samuel Nelson
Racks, Quandles And Virtual Knots, Victor Samuel Nelson
LSU Doctoral Dissertations
We begin with a brief survey of the theory of virtual knots, which was announced in 1996 by Kauffman. This leads naturally to the subject of quandles and quandle homology, which we also briefly introduce. Chapter 2 contains a proof in terms of Gauss diagrams that the forbidden moves unknot virtual knots. This chapter includes material which has appeared in the Journal of Knot Theory and its Ramifications and is reprinted here by permission of World Scientific Publishing. In chapter 3 (cowritten with my advisor R.A.Litherland) we confirm a conjecture of J.S.Carter et.al. that the long exact sequence in rack …
Exotic Integral Witt Equivalence Of Algebraic Number Fields, Changheon Kang
Exotic Integral Witt Equivalence Of Algebraic Number Fields, Changheon Kang
LSU Doctoral Dissertations
Two algebraic number fields K and L are said to be exotically integrally Witt equivalent if there is a ring isomorphism W(OK) ~ W(OL) between the Witt rings of the number rings OK and OL of K and L, respectively. This dissertation studies exotic integral Witt equivalence for totally complex number fields and gives necessary and sufficient conditions for exotic integral equivalence in two special classes of totally complex number fields.
Sediment Transport In Wind-Exposed Shallow, Vegetated Aquatic Systems, Allen Michael Teeter
Sediment Transport In Wind-Exposed Shallow, Vegetated Aquatic Systems, Allen Michael Teeter
LSU Doctoral Dissertations
Ecosystems with submersed vegetation are relatively shallow, physically stable and of moderate hydrodynamic energy. Submersed vegetation affect hydrodynamic friction for currents and waves resulting in increased overall frictional loss. Seagrasses shelter the sediment bed and reduce wind-wave resuspension. Bed sheltering factors were estimated from previous flume data on Laguna Madre seagrass species. Data from Laguna Madre indicate that total suspended material levels for bare areas are about an order of magnitude higher than some areas with submersed vegetation. Waves in Laguna Madre at depths less than 2 m were found to be smaller than those expected for the same non-dimensional …
Study Of A Bacillus Circulans Chitin-Binding Domain By A Green Fluorescent Protein Binding Assay And Detection Of Lysozymes By Improved Zymograms, Markus Hardt
LSU Doctoral Dissertations
A fluorescent binding assay was developed to investigate the effects of site-directed mutagenesis on the binding affinity and binding specificity of the chitin-binding domain of chitinase A1 from Bacillus circulans WL-12. The chitin-binding domain (ChBD) was genetically fused to the N-terminus of the green fluorescent protein, GFP. The polyhistidine-tagged hybrid protein was expressed in Escherichia coli under the dose-dependent regulation of the araBAD promoter and purified using metal affinity-, chitin- or ion-exchange chromatography. Residues suggested to be involved in binding from previous three-dimensional studies were mutated and their contributions to binding and substrate specificity were evaluated by depletion assays. Purified …
Tidal Dynamics In The Bab El Mandab Strait, Ewa Jarosz
Tidal Dynamics In The Bab El Mandab Strait, Ewa Jarosz
LSU Doctoral Dissertations
The Bab el Mandab Strait is where the transition occurs between two noticeably different tidal regimes: the Gulf of Aden, where tidal fluctuations are mixed and have a range in excess of 2 m, and the Red Sea, where the tides are principally semidiurnal and their range is less than 1 m. Within the Strait, observations collected between May of 1995 and July of 1997 indicate that tidal currents are a mixed type and dominant constituents are the K1 and M2. The vertical structure of the tidal currents is complicated, differs between semidiurnal and diurnal constituents, and …
Efficient Parallel Computation On Multiprocessors With Optical Interconnection Networks, Min He
Efficient Parallel Computation On Multiprocessors With Optical Interconnection Networks, Min He
LSU Doctoral Dissertations
This dissertation studies optical interconnection networks, their architecture, address schemes, and computation and communication capabilities. We focus on a simple but powerful optical interconnection network model - the Linear Array with Reconfigurable pipelined Bus System (LARPBS). We extend the LARPBS model to a simplified higher dimensional LAPRBS and provide a set of basic computation operations. We then study the following two groups of parallel computation problems on both one dimensional LARPBS's as well as multi-dimensional LARPBS's: parallel comparison problems, including sorting, merging, and selection; Boolean matrix multiplication, transitive closure and their applications to connected component problems. We implement an optimal …
Numerical Reservoir Characterization Using Dimensionless Scale Numbers With Application In Upscaling, Djuro Novakovic
Numerical Reservoir Characterization Using Dimensionless Scale Numbers With Application In Upscaling, Djuro Novakovic
LSU Doctoral Dissertations
Dimensionless space provides a tool for analyzing the behavior of complex systems described by mathematical relationships. The limited application of dimensionless variables in numerical reservoir simulation and experimental design motivated the development of a complete set of dimensionless scaling groups. Inspectional analysis yielded 8 dimensionless groups completely describing the flow system. Further analysis of fluid interaction reduced the number of dimensionless groups to 7. The newly developed dimensionless equations and groups were used for analytical and numerical reservoir characterization, quantifying the behavior of differential and difference equations employed in fluid flow in three-dimensional porous media. The behavior of the dimensionless …
Impact Of Subject Related Factors And Position Of Flight Control Stick On Acquisition Of Simulated Flying Skills Using A Flight Simulator, Bo-Keun Cho
LSU Doctoral Dissertations
Increasing demand on aviation industry calls for more pilots. Thus, pilot training systems and pilot-candidate screening systems are essential for civil and military flying training institutes. Before actual flight training, it is not easy to determine whether a flight trainee will be successful in the training. Due to the high cost of actual flight training, it would be better if there were low cost methods for screening and training candidates prior to the actual flight training. This study intended to determine if subject related factors and flight control stick position have an impact on acquisition of simulated flying skills using …
The Combined Effects Of Salinity And Sulfide On The Growth And Physiology Of The Freshwater Marsh Plant Pancium Hemitomon J.A. Schultes, James Wesley Pahl
The Combined Effects Of Salinity And Sulfide On The Growth And Physiology Of The Freshwater Marsh Plant Pancium Hemitomon J.A. Schultes, James Wesley Pahl
LSU Doctoral Dissertations
Vegetative response to saltwater intrusion into coastal freshwater wetlands is governed by the combined effects of increased salinity and porewater sulfide concentrations. I conducted a series of experiments to address the primary hypothesis that growth of Panicum hemitomon is adversely affected by an interaction between salinity and sulfide stresses associated with saltwater intrusion, and the mechanisms for decreased growth are alterations in the metabolic and morphological adaptations needed for a plant to survive in a flooded environment. I exposed marsh sods to a factorial treatment arrangement of three salinities (0, 2, and 4 ppt) and three porewater sulfide concentrations (0, …
X-Ray Spectroscopy Of Geometrically Constrained Systems, Edward Earl Doomes
X-Ray Spectroscopy Of Geometrically Constrained Systems, Edward Earl Doomes
LSU Doctoral Dissertations
Hard X-rays (2 KeV or greater) are used as spectroscopic tools in the characterization of chemical systems. X-ray absorption near edge structure (XANES) spectroscopy is used to characterize multiple groups of chemicals in a systematic fashion. This thesis focuses on chemical systems that in some context have geometrical constraints on their structure. They include self-assembled n-alkanethiol monolayers that are tethered to silver substrates, cyclic sulfides, and (Bis(diphenylphosphino) alkane tetracarbonyl metal complexes. The study of n-alkanethiol monolayers on Ag(111) contains the first observation in the literature of an anomalous resonance in the 18 carbon monolayer. A new interpretation of a subthreshold …
Scientific And Management Perspectives In Wetland Groundwater Hydrology, Lorna Veronica Inniss
Scientific And Management Perspectives In Wetland Groundwater Hydrology, Lorna Veronica Inniss
LSU Doctoral Dissertations
Wetland groundwater hydrology was investigated at different spatial scales to assess the usefulness of the information to coastal managers. Specific objectives were to: (1) review studies related to coastal groundwater discharge, evaluating techniques and identifying controls; (2) understand regional trends in groundwater flow along the U.S. East and Gulf coasts; (3) evaluate the applicability of naturally occurring radioisotopes as indicators of groundwater in a shallow deltaic system; and (4) evaluate groundwater-surface water exchange within Barataria Basin, Louisiana. Results of the review confirmed discharge estimates vary over several orders of magnitude, due to differences in precipitation and tidal prisms. In addition, …
High Resolution Modeling Of Transport In Porous Media, Guangli Liu
High Resolution Modeling Of Transport In Porous Media, Guangli Liu
LSU Doctoral Dissertations
This dissertation presents research on the pore-level modeling of transport in porous media. The focus of this work is on high-resolution modeling, a rigorous approach that represents detailed geometry and first-principle physics at the streamline scale. Three major topics are presented in this dissertation: an efficient approach for solving Stokes flow in essentially arbitrary disordered porous media, high-resolution versus network simulations of dispersion phenomena, and a stochastic model for solving interfacial mass transfer from source spheres in porous media. First an approach was developed for solving the Stokes flow problem in a comparatively large, very heterogeneous two-dimensional porous media with …
Fabricating Microfluidic Devices In Polymers For Bioanalytica Applications, Sean M. Ford
Fabricating Microfluidic Devices In Polymers For Bioanalytica Applications, Sean M. Ford
LSU Doctoral Dissertations
The research presented in this document focuses on the fabrication, characterization and application of microfluidic systems fabricated in poly(methyl methacrylate) (PMMA) with the emphasis focused on the fabrication processing steps. Microfluidic devices were produced in PMMA using X-ray lithography. The fabrication methods investigated were sacrificial mask, polyimide membrane mask and embossing techniques. PMMA microfluidic devices fabricated using X-ray lithography were characterized using scanning electron microscopy (SEM) and optical microscopy, while analytical techniques such as electroosmotic flow determination, separations, and fluorescent microscopy were used to characterize fluid transport in these devices. A novel method for the heat annealing of PMMA to …
Improvement Of Resonant Harmonic Filter Effectiveness In The Presence Of Distribution Voltage Distortion, Herbert L. Ginn
Improvement Of Resonant Harmonic Filter Effectiveness In The Presence Of Distribution Voltage Distortion, Herbert L. Ginn
LSU Doctoral Dissertations
Resonant harmonic filters (RHFs), are the most common devices installed in distribution systems for reducing distortion caused by harmonic generating loads. When such filters are applied in systems with a distorted distribution voltage their effectiveness may decline drastically. This dissertation explores the causes of degradation of RHFs effectiveness and suggests methods of their improvement both by optimization algorithms and by modification of the filter structure. An optimization based design method is developed for the conventional RHF. It takes into consideration the interaction of the filter with the distribution system and provides a filter which gives the maximum effectiveness with respect …
Mode Specific Photoionization Dynamics In Polyatomic Molecules, Gerald Jeffery Rathbone
Mode Specific Photoionization Dynamics In Polyatomic Molecules, Gerald Jeffery Rathbone
LSU Doctoral Dissertations
The work presented in this dissertation presents new work on polyatomic photoionization. In these investigations, the broad range behavior of both allowed and forbidden vibrational modes in linear triatomic systems were studied to understand mode specific aspects of photoionization. The current study is made possible by the experimental strategy of exploiting high resolution photoelectron spectroscopy and the high brightness of third generation synchrotron radiation sources. The data is taken typically tens of eV’s past the ionization potential. The strategy that I employ is to probe alternative vibrational modes which are frequently affected differently following resonant ionization. Such vibrationally resolved data …
The Relationship Between Author And Audience: Case Study Of A Young-Adult Author And A Student Audience, Keitha Ilene Phares
The Relationship Between Author And Audience: Case Study Of A Young-Adult Author And A Student Audience, Keitha Ilene Phares
LSU Doctoral Dissertations
How does author relate to audience? This overarching question guided a case study focused on author Rick Norman and his novel Fielder’s Choice. Specific questions were (1) What was, and is, this author’s conception of his audience for the book? (2) How do members of the audience—specifically five high school students—respond to the novel? (3) How do the audience’s responses relate to the author’s stated intentions? Data came from the following sources: interviews with the author, the student readers, and the editor of the book; students’ written responses to the book and the author’s written reactions to those responses; an …
Capillary And Microdevice Electrophoretic Tools For Genetic Analyses: Heteroduplex Analysis For Tuberculosis Drug Susceptibility And Ligase Detection Reaction For Colorectal Cancer Detection, Gloria Thomas
LSU Doctoral Dissertations
The traditional format of electrophoresis, the slab gel, is quickly being replaced by capillary and microdevice platforms, which offer improvements in cost, resolution, speed, quantitation and automation in genetic analyses. These techniques also employ a variety of separation matrices while the slab gel is limited to agarose and polyacrylamide. The research presented here explores the use of these electrophoretic formats for the detection of single nucleotide mutations using two genetic models associated with human disease. Slab gel based heteroduplex analysis (HDA), a popular mutation scanning method, uses a specially designed universal heteroduplex generator (UHG) containing controlled variation to enhance the …