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2011

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Stories Of The Proterozoic Earth: Paleoproterozoic Chuanlinggou Arcitarchs And Neoproterozoic ¹⁷O-Depleted Barite, Yongbo Peng Jan 2011

Stories Of The Proterozoic Earth: Paleoproterozoic Chuanlinggou Arcitarchs And Neoproterozoic ¹⁷O-Depleted Barite, Yongbo Peng

LSU Doctoral Dissertations

This dissertation consists of two independent topics, both critical to understanding Earth history during the Proterozoic Eon. (1) Paleoproterozoic Chuanlinggou Acritarchs: The eukaryotic affinity of acritarchs from the Chuanlinggou Formation has been questioned because of lack of indisputable morphological evidence. In this study, Chuanlinggou acritarchs were examined by jointly using optical microscopy, scanning electron microscopy, and transmission electron microscopy. In most cases, an ovoidal group of acritarchs represents a half-vesicle following a complete longitudinal rupture, which is a morphological model different from a whole envelope with medial splits, as proposed by earlier studies. This ovoidal group displays a bipolar morphology, …

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Sensor-Based Autonomous Pipeline Monitoring Robotic System, Jong-Hoon Kim Jan 2011

Sensor-Based Autonomous Pipeline Monitoring Robotic System, Jong-Hoon Kim

LSU Doctoral Dissertations

The field of robotics applications continues to advance. This dissertation addresses the computational challenges of robotic applications and translations of actions using sensors. One of the most challenging fields for robotics applications is pipeline-based applications which have become an indispensable part of life. Proactive monitoring and frequent inspections are critical in maintaining pipeline health. However, these tasks are highly expensive using traditional maintenance systems, knowing that pipeline systems can be largely deployed in an inaccessible and hazardous environment. Thus, we propose a novel cost effective, scalable, customizable, and autonomous sensor-based robotic system, called SPRAM System (Sensor-based Autonomous Pipeline Monitoring Robotic …

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Transnational Spaces And Communal Land Tenure In A Caribbean Place: "Barbuda Is For Barbudans", Amy E. Potter Jan 2011

Transnational Spaces And Communal Land Tenure In A Caribbean Place: "Barbuda Is For Barbudans", Amy E. Potter

LSU Doctoral Dissertations

In the last decade, transnational migration research has gained considerable ground in geography. There is still more to be done, however, in order to understand the complex relationship between migrants and the lands they leave behind. The island of Barbuda in the Lesser Antilles is the ideal place to study the larger issues of transnational migration on a smaller scale, particularly research that focuses on both migration and land tenure. Barbudan land tenure is common property, something that was in practice for more than a century and formalized into law in January of 2008. Because of this particular system of …

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Understanding Online Sourcing Decisions From The Service Clients' Perspective: An Integrative Theoretical Framework, Baozhou Lu Jan 2011

Understanding Online Sourcing Decisions From The Service Clients' Perspective: An Integrative Theoretical Framework, Baozhou Lu

LSU Doctoral Dissertations

In this study we empirically examine a new global phenomenon - online sourcing – with a quantitative research method. Online sourcing is the newest development in outsourcing recently that uses Internet as the primary sourcing platform to approach the global sourcing of services. We believe that the emergence of online sourcing will fundamentally change the way work is done. Thus, gaining a deep understanding of the adoption of online sourcing becomes particularly important. Drawing upon theories of firms including transaction cost theory, we propose an integrative theoretical framework for the understanding of online sourcing decisions from the service clients’ perspective. …

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Exotic Ground States: A Study In The Structural Effects On Frustration And Dimensionality, Melissa C. Menard Jan 2011

Exotic Ground States: A Study In The Structural Effects On Frustration And Dimensionality, Melissa C. Menard

LSU Doctoral Dissertations

Structural disorder and dimensionality play central roles in the characterization of structure and properties of crystalline materials. Although structural disorder is commonly considered an undesirable quality, structural disorder may be desirable when searching for new materials with exotic properties. Disorder can be used as a tunable parameter when considering atomic sizes, coordination preferences, and electronegativity differences can be varied by substituting elements into a given structure. Dimensionality can be viewed as another adjustable parameter when searching for new materials presenting unique challenges when characterizing new materials. One way to tune dimensionality is by chemical doping to affect coupling between layers/chains. …

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Fragmentation Sensitivity And Its Consequences On Demography And Host-Ectoparasite Dynamics In Amazonian Birds, Erik I. Johnson Jan 2011

Fragmentation Sensitivity And Its Consequences On Demography And Host-Ectoparasite Dynamics In Amazonian Birds, Erik I. Johnson

LSU Doctoral Dissertations

The Amazon rainforest is experiencing rapid deforestation due to ranching, agriculture, and urban development, which often leads to remnant patches serving as refugia for forest organisms. By mist-netting passerines in 11 forest fragments (1-, 10-, and 100-ha patches) and nearby continuous forest at the Biological Dynamics of Forest Fragmentation Project near Manaus, Brazil, I conducted a series of studies to identify mechanisms that drive population changes in fragmented landscapes. First, I examined the age structure of bird populations from six ecological guilds in fragments and continuous forest. Immatures are the dispersing age group in birds, and their relative abundance in …

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Decoupling User Interface Design Using Libraries Of Reusable Components, Rajesh Sankaran Jan 2011

Decoupling User Interface Design Using Libraries Of Reusable Components, Rajesh Sankaran

LSU Doctoral Dissertations

The integration of electronic and mechanical hardware, software and interaction design presents a challenging design space for researchers developing physical user interfaces and interactive artifacts. Currently in the academic research community, physical user interfaces and interactive artifacts are predominantly designed and prototyped either as one-off instances from the ground up, or using functionally rich hardware toolkits and prototyping systems. During this prototyping phase, undertaking an integral design of the interface or interactive artifact’s electronic hardware is frequently constraining due to the tight couplings between the different design realms and the typical need for iterations as the design matures. Several current …

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A Comparison Of Career Goals And Educational Values Between Hispanic Immigrant And Caucasian United States Citizen Employees Of Louisiana Crawfish Farm Operations, Richard Dean Johnson Ii Jan 2011

A Comparison Of Career Goals And Educational Values Between Hispanic Immigrant And Caucasian United States Citizen Employees Of Louisiana Crawfish Farm Operations, Richard Dean Johnson Ii

LSU Doctoral Dissertations

Hispanic immigrants come to the United States with hopes to obtain a better life for their families through perceived better wages and educational opportunities. One source of income for Hispanic immigrants is through employment in crawfish farm operations. Crawfish farm operations benefit from the employment of Hispanic immigrants through government programs that supply workers to the industry. Therefore, many crawfish farm operations in Louisiana employ both Caucasian U.S. citizen and Hispanic immigrant labor to operate efficiently. The purpose of this study was to compare selected characteristics of crawfish farm workers as well as to explore values related to education, monetary …

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Examining The Perceptions Of Teachers' Efficacy In Handling Student Misbehavior (Tehsm) In Classroom And Physical Education Settings, Costas Nicou Tsouloupas Jan 2011

Examining The Perceptions Of Teachers' Efficacy In Handling Student Misbehavior (Tehsm) In Classroom And Physical Education Settings, Costas Nicou Tsouloupas

LSU Doctoral Dissertations

Research has found dealing with student misbehavior as the most prominent source associated with teachers’ negative behavioral outcomes at work. One approach for understanding teachers’ behavioral responses to student misbehavior is through the efficacy beliefs of teachers. This line of inquiry has lead to the advancement of the concept of teacher efficacy in handling student misbehavior or TEHSM. TEHSM was found to significantly and negatively mediate the relationship between teachers’ perception of student misbehavior, emotional exhaustion, and turnover intentions respectively. To date, limited information is available regarding the makeup of TEHSM which gives emphasis to the significance of this dissertation. …

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Fatalities Due To Hurricane Katrina's Impacts In Louisiana, Ezra Clay-Kelly Boyd Jan 2011

Fatalities Due To Hurricane Katrina's Impacts In Louisiana, Ezra Clay-Kelly Boyd

LSU Doctoral Dissertations

This dissertation presents a comprehensive analysis of the loss of life in Louisiana associated with Hurricane Katrina and the catastrophic failure of the federal hurricane protection system. While Louisiana officials attribute 1,464 deaths to this disaster, a Louisiana Katrina Victim Database compiled for this dissertation lists 1,575 victims whose death can be linked to circumstances related to the disaster. First, this dissertation presents a comprehensive assessment of the multiple hazards impacting a dynamic population within southeast Louisiana. This is followed by a comprehensive descriptive analysis of victims’ characteristics. Both of these assessments point to an important conclusion: circumstances matter in …

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Synthesis, Biological And Photophysical Studies Of Novel Compounds For Cancer Therapy, Edith Khavwajira Amuhaya Jan 2011

Synthesis, Biological And Photophysical Studies Of Novel Compounds For Cancer Therapy, Edith Khavwajira Amuhaya

LSU Doctoral Dissertations

Cancer remains the second most common cause of death in the United States. It is therefore imperative that a lot of effort be put into finding a cure for this dreadful disease that shows no discrimination, and virtually anybody is at risk of developing the disease. Chapter 1 introduces basic facts about cancer and the available treatments, including PDT and BNCT. Our focus will be on these two bimodal therapies, which form the basis of my research work, which involves the synthesis of potential sensitizers to be used either in PDT or BNCT or both. In Chapter 2, I discuss …

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"The Colossal Vitality Of His Illusion": The Myth Of The American Dream In The Modern American Novel, James E. Ayers Jan 2011

"The Colossal Vitality Of His Illusion": The Myth Of The American Dream In The Modern American Novel, James E. Ayers

LSU Doctoral Dissertations

This dissertation argues that the American dream is a large-scale cultural myth, and that through an analysis of the dream’s mythic structure we can locate a paradigm according to which both American literature and American culture are organized. The American dream has maintained unique relevance across the historical, regional, and cultural diversity of the American nation, in part because it always remains abstract and resists firm definition. Nevertheless, by breaking the broad myth into its most basic elemental parts we can begin to see patterns across the many distinctive versions of the American dream, such that we can identify the …

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Next Generation Multi-Scale Quantum Simulations For Strongly Correlated Materials, Shuxiang Yang Jan 2011

Next Generation Multi-Scale Quantum Simulations For Strongly Correlated Materials, Shuxiang Yang

LSU Doctoral Dissertations

This thesis represents our effort to develop the next generation multi-scale quantum simulation methods suitable for strongly-correlated materials, where complicated phase-diagrams prevail, suggesting complicated underlying physics. We first give a detailed description of the parquet formalism. With its help, different approximate methods can be unified and a hierarchy of approximate methods with different accuracies and computational complexity can thus be designed. Next, we present a numerical solution of the parquet approximation. Results on the Hubbard model are compared to those obtained from Determinant Quantum Monte Carlo (DQMC), FLuctuation EXchange (FLEX), and self-consistent second-order approximation methods. The comparison shows a satisfactory …

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Characterization Of Novel Akermanite:Poly-E-Caprolactone Scaffolds For Bone Tissue Engineering Aapplications Combined With Human Adipose-Derived Stem Cells, Andre S. Zanetti Jan 2011

Characterization Of Novel Akermanite:Poly-E-Caprolactone Scaffolds For Bone Tissue Engineering Aapplications Combined With Human Adipose-Derived Stem Cells, Andre S. Zanetti

LSU Doctoral Dissertations

The development of porous materials useful as scaffolds for the sustained three-dimensional (3D) growth of human adipose-derived stem cells (hASC) is of particular interest to facilitate healing after musculoskeletal injuries. In this study, a composite porous material obtained by blending akermanite with poly-e-caprolactone (PCL) is proposed as novel alternative to bone tissue regeneration. The objectives of this study are (1) to characterize the akermanite:PCL scaffold properties; (2) to investigate the in vitro osteogenic potential of hASC loaded to optimal akermanite:PCL scaffolds; (3) to assess the metabolic activity and osteogenesis of hASC loaded to optimal akermanite:PCL scaffolds post-thawing using optimal cryopreservation …

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Identification Of Novel Core And Accessory Factors Involved In Nucleotide Excision Repair In Yeast, Danielle Marie Tatum Jan 2011

Identification Of Novel Core And Accessory Factors Involved In Nucleotide Excision Repair In Yeast, Danielle Marie Tatum

LSU Doctoral Dissertations

ABSTRACT Nucleotide excision repair (NER) is a highly conserved DNA repair mechanism which deals with a wide variety of bulky, helix-distorting lesions, such as UV-induced cyclobutane pyrimidine dimers (CPDs). NER is traditionally grouped into two pathways: global genomic repair (GGR), which is operative throughout the genome, and transcription coupled repair (TCR), which is dedicated to rapid repair of the transcribed strand of actively transcribed genes. Though most of the core NER proteins are known, the exact biochemical mechanism of eukaryotic NER remains elusive. This dissertation focused on identifying novel core and accessory factors which function in NER. In the budding …

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Nonverbal Communication Among Pointe Coupee Creoles, Elsie Angelique Bergeron Gardner Jan 2011

Nonverbal Communication Among Pointe Coupee Creoles, Elsie Angelique Bergeron Gardner

LSU Doctoral Dissertations

Interactions are understood through the filter of language and culture. Because of this when people of different cultures interact, miscommunications often result. As both verbal and nonverbal aspects of communication are culturally specific, this paper examines trends in the nonverbal communication patterns of generations of Pointe Coupee Creoles undergoing language shift from Creole French in the older generation to English in the younger. The data demonstrate that nonverbal patterns are decoupled from verbal language to some extent in the degree to which they are maintained down the observable generations of Pointe Coupee Creole participants. This study analyzes videos of naturally …

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Playing Class: A Case Study Of Ludic Pedagogy, Jessica Broussard Jan 2011

Playing Class: A Case Study Of Ludic Pedagogy, Jessica Broussard

LSU Doctoral Dissertations

The purpose of this study was to examine the efficacy of transforming traditional classroom content and teaching strategy into a "gamified" version through the use of popular gaming strategy, or, in other words, how a college course can be designed or redesigned to mimic ludic pedagogy, as well as the influence of this pedagogy on student performance in understanding course content and course assessments. The researcher acted as a participant observer and used Constant Comparative Method as data driven teaching focused on student created documents. This research provides an exploration on the use of ludicly styled teaching methodology which includes …

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The Ecology Of Congeneric Resprouters And Reseeders (Hypericum Spp.) Along Fire-Frequented Pine Savanna Ecoclines, Raelene Marie Crandall Jan 2011

The Ecology Of Congeneric Resprouters And Reseeders (Hypericum Spp.) Along Fire-Frequented Pine Savanna Ecoclines, Raelene Marie Crandall

LSU Doctoral Dissertations

Resprouting and reseeding shrubs are predicted to be restricted to habitats with long and short return intervals of natural disturbances, respectively. Nonetheless, resprouters and reseeders co-occur along Gulf of Mexico coastal ecoclines where lightning-ignited fires were historically frequent. In this collection of studies, I examine fire responses, habitat associations, distribution limits, and seedling recruitment of Hypericum species along ecoclines in pine savannas of the St. Joe Bay State Buffer Preserve in Gulf County of Florida. In this area, ecoclines are characterized by topographic, soil moisture, and fire heterogeneity gradients. Hypericum microsepalum, an obligate resprouter, primarily resprouts following disturbances that …

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A Biomimic Self-Healing Shape Memory Polymer Based Syntactic Foam For Smart Structural Composites, Jones Nji Jan 2011

A Biomimic Self-Healing Shape Memory Polymer Based Syntactic Foam For Smart Structural Composites, Jones Nji

LSU Doctoral Dissertations

This study explored the development of a new self-healing Polystyrene Shape Memory Polymer (PSMP) based syntactic foam for service life extension in structural polymeric composites. The objective was to self-heal structural-length scale damage in an autonomous, efficient, timely and repeatable manner at the molecular-length scale. Self-healing is achieved through a novel two step close-then-heal (CTH) self-healing scheme, designed to mimic the natural biological process of wound healing in humans. A new methodology to fabricate three-dimensional (3-D) fiber reinforced shape memory polymer syntactic foam for structural applications was developed. The effect of impact energy on the ability for the 3-D fiber …

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Lee Hoiby's I Have A Dream, Terrance Deace Brown Jan 2011

Lee Hoiby's I Have A Dream, Terrance Deace Brown

LSU Doctoral Dissertations

The primary focus of this document is to provide performers and musical scholars with an analysis of Lee Hoiby’s musical composition I Have A Dream. The opening of this document will be biographical, including facts regarding family lineage, education, positions held, general aspects of his personality and significant influence regarding equal rights. Biographical information will span from Dr. Martin Luther King, Jr.’s birth (January 15, 1929) to the March on Washington (August 28, 1963). Next, I will outline the methodology and techniques Dr. King used in leading the movement. Literary texts written by King, Jr. and other influential writers will …

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Analytical Design Method For Cold Production Of Heavy Oil With Bottom Water Using Bilateral Sink Wells, Wenting Qin Jan 2011

Analytical Design Method For Cold Production Of Heavy Oil With Bottom Water Using Bilateral Sink Wells, Wenting Qin

LSU Doctoral Dissertations

Few heavy oil reservoirs with strong bottom water drives have been developed successfully because of severe water coning. Water coning tends to cause low ultimate recovery, low well productivity, and high water production. Although thermal and gravity-assisted methods might improve recovery in oil reservoirs, such methods are widely perceived as either economically unfavorable or technologically infeasible. This study proposes a new, cold production technique, called Bilateral Water Sink (BWS), to meet those challenges. The BWS method suppresses water cresting by producing oil and water simultaneously from separate, horizontal wells completed in the oil and water zones; the oil and water …

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Dyadic Meta-Accuracy In Leader-Member Exchanges: An Examination Of Antecedents And Relational Outcomes, Jared A. Ledoux Jan 2011

Dyadic Meta-Accuracy In Leader-Member Exchanges: An Examination Of Antecedents And Relational Outcomes, Jared A. Ledoux

LSU Doctoral Dissertations

Work organizations are inherently social entities, dependent upon the social interactions between supervisors and subordinates. This study examined the role of interpersonal processes within organizational settings, focusing upon subordinates‟ accuracy in judging their supervisors‟ impressions of the subordinates‟ personality. This phenomenon, dyadic meta-accuracy, is examined within exchange relationships between supervisors and subordinates, drawing upon Leader Member Exchange (LMX) theory and the metaperception literature. A theoretical framework proposed potential antecedents of subordinate meta-accuracy, including: communication frequency, physical proximity, psychological closeness, and trait visibility. In addition, subordinate meta-accuracy was proposed as a determinant of the relational quality between subordinate and supervisor and …

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An African American Discourse Community In Black & White: The New Orleans Tribune, Kristi Richard Melancon Jan 2011

An African American Discourse Community In Black & White: The New Orleans Tribune, Kristi Richard Melancon

LSU Doctoral Dissertations

In An African American Discourse Community in Black & White: The New Orleans Tribune, an archival study of the first black-owned daily newspaper in the United States, I argue that the newspaper rhetorically constructed a literate African American discourse community worthy of citizenship and equal political rights within the public sphere of Reconstruction United States. Although contemporaneous media in the South depicted blacks as both unable to read and write and as culturally illiterate, I demonstrate how articles across the lifespan of the Tribune represented, as well as encouraged and enabled, multiple literacies within the African American community. I ultimately …

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Silicon Nanowire Anode For Lithium-Ion Batteries: Fabrication, Characterization And Solid Electrolyte Interphase, Wanli Xu Jan 2011

Silicon Nanowire Anode For Lithium-Ion Batteries: Fabrication, Characterization And Solid Electrolyte Interphase, Wanli Xu

LSU Doctoral Dissertations

Depletion of fossil fuels and concerns over CO2 emission have driven the development of electric vehicles (EVs) with high-energy efficiencies and low emissions. Lithium-ion rechargeable batteries, compared to lead acid, nickel cadmium, nickel metal hydroxide, and other popular rechargeable batteries, are considered as the most promising candidates for EVs for their high operating voltage and high energy density. Silicon nanowires are considered as lithium-ion battery anodes for their ultra high capacity at 4200 mAh·g-1 (10× higher than conventional graphite anode), as well as stress accommodation for reversible lithiation and delithiation. Silicon nanowires were fabricated via metal assisted electroless etching, and …

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Writing William Burroughs, Performing The Archive, John Lebret Jan 2011

Writing William Burroughs, Performing The Archive, John Lebret

LSU Doctoral Dissertations

Between 1958 and 1972, author William S. Burroughs undertook a series of radical experiments with alternative compositional modes based on the aleatory form of the Cut-up. Burroughs sold the entirety of his work from the period, assembled into an archive, to a collector in 1972. This study uses performative writing to document a year of archival research in Burroughs' collection, currently housed by The Henry W. and Albert A. Berg Collection of English and American Literature at the New York Public Library. Melding Bakhtin's theories of the chronotope and the grotesque body with creative writing and experimental modes of scholarly …

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Crime In New Orleans: Applying The Civic Community Perspective To Urban Violence, Jessica M. Doucet Jan 2011

Crime In New Orleans: Applying The Civic Community Perspective To Urban Violence, Jessica M. Doucet

LSU Doctoral Dissertations

Civic community theory is a macro-level social control perspective that has emerged within the past 10 years as an explanation of community variation in crime rates. The theory is based on the assumption that well-integrated communities are better able to regulate their members’ behaviors than poorly integrated communities. It has been particularly successful in explaining violent crime rates in rural counties or communities, but research has generally ignored the relationship between civic community theory and violent crime in urban areas. The current study aims to determine the applicability of the civic community perspective to urban areas, as a link has …

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The Effect Of Habitat Change On Nutrient Removal In The Atchafalaya River Basin, Louisiana, Amy E. Scaroni Jan 2011

The Effect Of Habitat Change On Nutrient Removal In The Atchafalaya River Basin, Louisiana, Amy E. Scaroni

LSU Doctoral Dissertations

The Mississippi and Atchafalaya rivers are the major sources of freshwater and nutrients to the Gulf of Mexico. Increased nutrient loads from these rivers exacerbate eutrophication in coastal receiving waters and contribute to the large area of hypoxia that develops seasonally in the Gulf. Levees along the Mississippi River have reduced contact between the river and the historic floodplain; this limits the ability of floodplain wetlands to naturally mitigate excess nutrients. However, the Atchafalaya River diverges from the Mississippi 217 km from the Gulf and enters a large river floodplain with a widely spaced levee system. This enhances the ability …

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A Performer's Guide To Gwyneth Walker's Settings Of Poetry By Lucille Clifton- No Ordinary Woman! And Three Songs For Lucille, Ebony Darshay Preston Jan 2011

A Performer's Guide To Gwyneth Walker's Settings Of Poetry By Lucille Clifton- No Ordinary Woman! And Three Songs For Lucille, Ebony Darshay Preston

LSU Doctoral Dissertations

No Ordinary Woman! is atypical of Walker’s style in that the composer employs jazz elements as the building blocks for this composition. From ballads to scat singing, each song is representative of a different style of jazz. The cycle, consisting of five songs, explores the poet’s journey of contemplation regarding various aspects of her life, predominantly her physical appearance. In No Ordinary Woman! and Three Songs for Lucille, the poet reflects on and ultimately celebrates her physical appearance. This document contains information about the lives and works of composer Gwyneth Walker and poet Lucille Clifton, the commissions, premieres, compositional processes, …

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Hbcu Crises And Best Practices In The Discourse Of Renewal: A Crisis Communication Case Study Of Three Institutions, Erica Courtney Taylor Jan 2011

Hbcu Crises And Best Practices In The Discourse Of Renewal: A Crisis Communication Case Study Of Three Institutions, Erica Courtney Taylor

LSU Doctoral Dissertations

Crises have been a part of all societies over the course of time. Leaders of small, primitive societies may have dealt with these crises by directly communicating with their citizens or by taking other hands-on approaches to crisis management and recovery. However, in large post-modern technological societies, leaders must find more efficient ways to handle and recover from crises. This qualitative study examines three crises that occurred at three Historically Black Colleges or Universities (HBCUs) in the last six years. Crisis communication planning and practices are explored with a special focus on elements of the discourse of renewal theory each …

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The Relationship Between Visual Attention And Prospective Memory, Noelle L. Brown Jan 2011

The Relationship Between Visual Attention And Prospective Memory, Noelle L. Brown

LSU Doctoral Dissertations

The current study examined the role of attention in prospective memory. Prospective memory refers to the ability to form an intention to do something in the future, such as email a colleague, and additionally remembering to do so at the appropriate moment. Theories of prospective memory retrieval suggest that attention is required to complete an intention. However, the exact role of attention and whether it is always required remains unclear. One challenge in examining the allocation of attentional resources in prospective memory is that a direct measure of these resources does not exist. The current study attempted to address this …

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