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1999

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Elongational Rheology Of Polyethylene Melts., Bijan Seyfzadeh Jan 1999

Elongational Rheology Of Polyethylene Melts., Bijan Seyfzadeh

LSU Historical Dissertations and Theses

Elongational melt flow behavior is an important and fundamental concept underlying many industrial plastics operations which involve a rapid change of shape as for example fiber spinning and stretching, bottle blow molding, and film blowing and stretching. Under high process loads polymeric materials experience enormous stresses causing the molecular structure to gain considerable orientation. This event has significant effects on the melt flow behavior and can be measured in terms of elongational viscosity and changes in enthalpy and entropy. Different polymeric materials with unique molecular characteristics are expected to respond uniquely to the elongational deformation; hence, molecular parameters such as …

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Rhetorical Theory: Discourse Practices Of Utopian Communities., Irvin Andreu Wilhite Jan 1999

Rhetorical Theory: Discourse Practices Of Utopian Communities., Irvin Andreu Wilhite

LSU Historical Dissertations and Theses

This study is interested in idealized expressions of political ideology in utopian science fiction literature written during the Cold War following World War II. Accordingly, a dramatistic analysis is presented regarding fourteen science fiction novels published between 1949 and 1959 which describes their thematic content with respect to consonant and contrasting moral/social/political positions and the influx of advancing technology. A description of the canonical works precedes this analysis. Subsequently, contemporary related studies are lightly analyzed for comparative and contextual considerations. Conclusions address the importance of rhetoric and performance in restoring the destabilized balance of power as an aftermath of violent …

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Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau Jan 1999

Isolation Of Antimutagenic Compounds In Corn And Cottonseed., Henry Njapau

LSU Historical Dissertations and Theses

Food, which ensures the sustenance of life, has also been implicated in the development or prevention of numerous diseases including cancer. Cancer may be a result of hereditary factors or genomic instability induced by DNA damage, from the intrinsic chemistry of cells or extrinsic factors like aflatoxin B1. Aflatoxin B1, produced by Aspergillus flavus and Aspergillus parasiticus, is a common contaminant of corn and cottonseed and a proven mutagen and animal carcinogen. Increased scientific knowledge and establishment of regulation have reduced but not eliminated exposure to aflatoxin B1. Complete elimination may be uneconomical for producers and may deprive consumers of …

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Executive Compensation And The Investment Opportunity Sets Of Initial Public Offerings., Tanya S. Nowlin Jan 1999

Executive Compensation And The Investment Opportunity Sets Of Initial Public Offerings., Tanya S. Nowlin

LSU Historical Dissertations and Theses

This study examines how the components of CEO compensation contracts vary with characteristics of initial public offering firms (IPOs). There are two major steps in the analysis. The first step investigates whether IPOs exhibit variation in characteristics that theory predicts affect compensation contracts. The second step investigates whether these differences across firms are related to the use of accounting versus non-accounting performance evaluation measures, levels of base salary and cash bonuses, and the value of stock options for CEOs. Results from this study support the importance of modeling compensation components separately. Theoretical constructs differ depending on the type of compensation …

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Integral Kernel Operators In The Cochran -Kuo -Sengupta Space., John Joseph Whitaker Jan 1999

Integral Kernel Operators In The Cochran -Kuo -Sengupta Space., John Joseph Whitaker

LSU Historical Dissertations and Theses

This dissertation contains several results about integral kernel operators in white noise analysis. The results found here apply to the space of test functions and generalized functions that were constructed in the paper of Cochran, Kuo, and Sengupta, based on a sequence of numbers &cubl0;an&cubr0; infinityn=0. . We shall prove results about existence, restrictions, and extensions of integral kernel operators based on the conditions on &cubl0;an&cubr0; infinityn=0. contained in the paper of Kubo, Kuo, and Sengupta. Also, we shall prove an analytic property and growth condition of the symbol of a continuous operator in CKS space. Our results are similar …

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Production Of Transgenic Eastern Oysters., John Terrell Buchanan Jan 1999

Production Of Transgenic Eastern Oysters., John Terrell Buchanan

LSU Historical Dissertations and Theses

The eastern oyster, Crassostrea virginica, supports a valuable industry in the United States and Louisiana. In recent years this industry has been plagued by diseases, creating interest in the use of gene transfer to produce oysters capable of eliminating pathogens. The goal of this work was to develop techniques for laboratory research of eastern oysters, and for transfer of genes to oyster gametes, larvae, and adults. Cell culture provides an effective alternative to work in whole animals. Cell attachment and spreading on various culture substrates was improved, and poly-D-lysine was identified as a superior substrate. Toxicity of the antibiotic G418 …

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"A Perfect War": Politics And Parties In Louisiana, 1824--1861., John Michael Sacher Jan 1999

"A Perfect War": Politics And Parties In Louisiana, 1824--1861., John Michael Sacher

LSU Historical Dissertations and Theses

My dissertation explores Louisiana's political development from 1824 to 1861. Many antebellum state studies have been written, but none focus specifically on Louisiana. While sharing the rest of the South's commitment to slavery and cotton, Louisiana possessed atypical attributes including: a unique ethnic composition, a sugar cane crop dependent upon a protective tariff, and the presence of New Orleans, the South's foremost commercial city. Louisiana's antebellum political situation resulted from the interaction of these distinctive traits with the characteristics that Louisiana shared in common with the rest of the United States. The primary focus of this political narrative is the …

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Organizing The *South: Railroads, Plantations, And War., Steven Gedson Collins Jan 1999

Organizing The *South: Railroads, Plantations, And War., Steven Gedson Collins

LSU Historical Dissertations and Theses

This work examines the emergence of organizational and bureaucratic ideas in the 19th-century South. It shows that organizational thinking took root in the antebellum South and grew during the Civil War. Many Southerners accepted the modern precepts of time, system, and bureaucratic control. They created of modern view of the world while incorporating slavery within this outlook. These same organizational ideals helped create a New South. The first section of this work examines how southern railroad managers introduced modern bureaucratic structures into their operations. At the same time, they incorporated slavery within this modern corporate structure. The second section examines …

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Experimental Mammalian Predator Removal And Other Factors Affecting Dabbling Duck Reproduction In North Dakota., Pamela Renee Garrettson Jan 1999

Experimental Mammalian Predator Removal And Other Factors Affecting Dabbling Duck Reproduction In North Dakota., Pamela Renee Garrettson

LSU Historical Dissertations and Theses

In the prairie pothole region, high predation rates often reduce duck nest success below the 15--20% thought necessary for population stability. Lethal removal of mammalian predators of duck nests is one potential management option, but there is little reliable information about the effects on nest success of removing mammalian predators without using poisons. On 16 4,150-ha blocks, half of them trapped during spring and summer, I found higher ( P < 0.001) nest success on trapped sites (45%) than on untrapped sites (17%). There were no year (P = 0.296), year-treatment (P = 0.423), or species-treatment (P > 0.895) effects. Nest success of blue-winged teal (Anas discors) and gadwalls (A. strepera) was higher than that of mallards ( A. platyrhynchos) and pintails (A. acuta, P = 0.028) on …

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Increasing Accuracy In Children's Verbal Self -Report Of Reinforcers., Gina Michelle Digiovanni Jan 1999

Increasing Accuracy In Children's Verbal Self -Report Of Reinforcers., Gina Michelle Digiovanni

LSU Historical Dissertations and Theses

Several studies have examined the relationship between self-report of behavior and actual behavior (Baer, Williams, Osnes, & Stokes, 1985; Bernstein & Michael, 1990; Risley & Hart, 1968). Results from such studies indicate poor correspondence between verbal self-report and actual behavior. This finding is particularly true for children (Guevremont, Osnes, & Stokes, 1986). However, few studies have examined conditions under which the accuracy of self-report procedures can be increased. The current study evaluated whether the accuracy of children's verbal self-report of reinforcers could be increased by modifying antecedent conditions. Specifically, the current study examined the effects of two antecedent variables (i.e., …

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Systematics Of The Common Garter Snake, Thamnophis Sirtalis., John Jeffrey Boundy Jan 1999

Systematics Of The Common Garter Snake, Thamnophis Sirtalis., John Jeffrey Boundy

LSU Historical Dissertations and Theses

Character variation was examined in the snake Thamnophis sirtalis . Initially, 187 characters were examined on five populations (OTUs). Only 12% of the characters failed to show geographic variation by ANOVA. A reduced data set of 72 characters remained after eliminating those that were invariant and correlated. The reduced data set was analyzed for interpopulation variation between 37 OTUs, of T. sirtalis. Numbers of significantly differentiated characters between OTUs, determined by ANOVA, were used to generate a UPGMA tree. The tree placed Texas and Chihuahuan populations as sister groups to all other OTUs, and grouped OTUs from west of the …

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Studies On Shrink -Wrapping And Low-Oxygen Storage Of 'Beauregard' Sweet Potatoes (Ipomoea Batatas (L.) Lam.)., Anthony Wathome Kilili Jan 1999

Studies On Shrink -Wrapping And Low-Oxygen Storage Of 'Beauregard' Sweet Potatoes (Ipomoea Batatas (L.) Lam.)., Anthony Wathome Kilili

LSU Historical Dissertations and Theses

The applicability of using shrink-wrap films in sweetpotato storage was investigated. 'Beauregard' sweetpotatoes were individually wrapped in either Cryovac D955, Clysar EHC50, Clysar EHC60 or Clysar EHC75 shrink-wrap film and a nonwrapped control. Roots were also overwrapped in 2.3-kg packages using Cryovac D955 or Clysar EHC75 films. Wrapped and nonwrapped roots were stored at either 7°C, 15.6°C or 22°C for five weeks followed by one week at 22°C. Shrink-wrapped roots exhibited increased sprouting. Roots wrapped in EHC75 film had less weight loss and increased sucrose compared to the other films. Shrink-wrapped roots were higher in sucrose content but were not …

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The Evolution Of The Red River Valley Settlement System, 1714--1860., Keumsoo Hong Jan 1999

The Evolution Of The Red River Valley Settlement System, 1714--1860., Keumsoo Hong

LSU Historical Dissertations and Theses

Since the first European settlement was established in the middle of Indian territory in 1714, the Red River Valley had experienced a dramatic transformation until the end of the antebellum period. The trajectory of the evolution can be divided into five vertical cross sections. The formative phase (1714--1803) features the colonial regimes in political arena, less-specialized regional economies, nascent urban units laden heavily with defensive functions, and coerced labor system. The settlement system resembled a semi-primate pattern with Natchitoches on the summit. The period of the Territory of Orleans (1804--1812) corresponded to the transition phase. During this interim, traditional staples …

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College Students' Understanding Of Stereochemistry: Difficulties In Learning And Critical Junctures., Gary Lester Lyon Jan 1999

College Students' Understanding Of Stereochemistry: Difficulties In Learning And Critical Junctures., Gary Lester Lyon

LSU Historical Dissertations and Theses

Because stereochemistry is an important part of both high school and college chemistry curricula, a study of difficulties experienced by students in the learning of stereochemistry was undertaken in a one-semester college organic chemistry course. This study, conducted over the course of two semesters with more than two hundred students, utilized clinical interviews, concept maps, and student journals to identify these difficulties, which were then tabulated and categorized. Although student journals were not a productive source of information, the types of difficulties that emerged from the concept maps were compared and contrasted with those that emerged from the clinical interviews. …

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Unrestrained Women And Decadent Old Aristocrats: The Nineteenth-Century Middle Class Struggle For Cultural Hegemony., Ronald Hamilton May Jan 1999

Unrestrained Women And Decadent Old Aristocrats: The Nineteenth-Century Middle Class Struggle For Cultural Hegemony., Ronald Hamilton May

LSU Historical Dissertations and Theses

This dissertation examines three popular novels of the Victorian period: W. G. M. Reynolds's Wagner, the Wehr-wolf (1846-7), Mary Elizabeth Braddon's Lady Audley's Secret (1862), and Bram Stoker's Dracula (1897). Each work was written during distinct decades of the nineteenth century when certain popular novels were under attack for rotting the minds of their readers, promoting vice, and subverting cultural standards. During the 1840s, when Reynolds's wrote Wagner, the Wehr-wolf , novels that were published in cheap penny weeklies created a sensation among mass readers. In the 1860s, when Braddon wrote Lady Audley's Secret, the sensation novel became popular with …

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Cryopreservation Of Gametes And Larvae Of The Eastern Oyster Crassostrea Virginica., Carmen G. Paniagua-Chavez Jan 1999

Cryopreservation Of Gametes And Larvae Of The Eastern Oyster Crassostrea Virginica., Carmen G. Paniagua-Chavez

LSU Historical Dissertations and Theses

Storage of gametes and larvae offers benefits for research and commercial oyster production and should be applicable in the hatchery at a commercial scale. We optimized refrigerated storage of eastern oyster sperm. Significant differences were found in the motility of sperm suspended in artificial sea water (ASW) of different osmotic pressures (P < 0.001). The highest motility was found in undiluted sperm and the lowest in 1:31 dilution. The greatest larval survival at 12 h (48%) was obtained with sperm diluted in calcium-free Hanks' balanced salt solution (C-F HBSS). Thus, for storage of longer than 1 d, it is best to leave samples undiluted. However, when sperm samples are diluted, it is best to maintain high sperm concentrations and to use C-F HBSS as an extender. Samples were frozen at -2.5°C/min, held for 5 min at -30°C, and plunged in liquid nitrogen using 10% propylene glycol (PG) as the cryoprotectant for sperm and 10% or 15% PG for trochophore larvae. Motility and fertilizing ability of thawed sperm were affected by cryoprotectant concentration and thawing temperature (P = 0.0001). Larval survival was affected by the concentration of larvae per straw (P = 0.0011). Frozen samples were transported to an oyster hatchery at Grand Isle, Louisiana. After 4 months, 1,000 oysters from the control group, 230 oysters produced from thawed sperm, and 850 oysters from thawed larvae were found. Oysters produced from thawed larvae developed normally in the hatchery, demonstrating opportunities for use of cryopreservation in research and aquaculture. Flow cytometry with the fluorescent dyes Sybr-14 and propidium iodide (PI) was used to assess membrane damage of thawed sperm, and rhodamine 123 and PI were used to assess mitochondrial function. Preliminary studies of cryopreservation of oyster eggs were performed. Fluorescein diacetate (FDA) was used to identify viable eggs. Dimethyl sulfoxide (0.88 M and 1.75 M) and sucrose (0.12 M and 0.25 M) were the least toxic cryoprotectants evaluated. The cooling rate yielding least damage to eggs was -1.5°C per min. However, only an average of 14 eggs (out of 200) were stained with FDA in thawed samples and none were fertilizable.

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Out Of Sight, Out Of Mind: A Gis Study Of Changes In Cemetery Locations In Southeastern Louisiana From An Archaeological And Geographical Perspective, 1930--1997., Cindy Ann Nance Jan 1999

Out Of Sight, Out Of Mind: A Gis Study Of Changes In Cemetery Locations In Southeastern Louisiana From An Archaeological And Geographical Perspective, 1930--1997., Cindy Ann Nance

LSU Historical Dissertations and Theses

Cemeteries in southeastern Louisiana are in varying stages of use---from presently in use and maintained to no longer visible on the surface. The abandonment of traditional cemeteries in southeastern Louisiana illustrates evolving settlement patterns. Earlier settlement patterns were dependent on physiographic and cultural landscape features. As settlement patterns evolve, the preferred locations of cemeteries change. As a recent participant in the nationwide preference for urban-associated Memorial Parks, is Louisiana in the process of abandoning traditional cemetery landscapes? Six factors that contribute to the abandonment of traditional cemeteries from 1930 to 1997 are presented in this study. Evolving communities, demographic shifts, …

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Survival, Behavior, And Movements Of Captive -Reared Mallards Released In Dorchester County, Maryland., David Benjamin Smith Jan 1999

Survival, Behavior, And Movements Of Captive -Reared Mallards Released In Dorchester County, Maryland., David Benjamin Smith

LSU Historical Dissertations and Theses

Private landowners with regulated shooting areas (RSA) and the Maryland Department of Natural Resources (DNR) have released up to 120,000 hand-reared mallards (Anas platyrhynchos) a year. Duck harvest on Wildlife Management Areas (WMAs) included 30, 18, and 6 percent state mallards and 6, 10, and 4 percent RSA mallards in 1991, 1992, and 1993, respectively. Kaplan-Meier survival estimates for radio-marked mallards released on RSAs were 81--85% for mid-August to mid-October, but declined to 32.5% +/- 13.7 (95% C.I.) by the end of the hunting season in 1992 and 54.3% +/- 22.8% in 1993. Hunting accounted for 71% of all mortalities …

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Addressing The Problems Of Beginning Teachers: An Evaluation Of Teacher Induction Programs., Daphene O. Singleton Jan 1999

Addressing The Problems Of Beginning Teachers: An Evaluation Of Teacher Induction Programs., Daphene O. Singleton

LSU Historical Dissertations and Theses

The purpose of this study was threefold: (1) to identify the characteristics of effective teacher induction programs, (2) to determine the relationship between teacher induction and retention in a northeastern Louisiana school district, and (3) determine if teacher induction practices in that district are useful to new/beginning teachers. A pilot study was conducted, and a validity panel of experts validated the content and face validity of the survey and interview instruments developed for the various participants. The participants included the superintendent Central Office staff persons, selected principals, and new/beginning teachers. There was some discrepancy between the responses of the teachers …

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Curriculum And The Holocaust: Competing Sites Of Memory And *Representation., Marla Beth Morris Jan 1999

Curriculum And The Holocaust: Competing Sites Of Memory And *Representation., Marla Beth Morris

LSU Historical Dissertations and Theses

Curriculum theory is a call to understanding. My call as a curriculum theorist is to attempt to understand work around the Holocaust. This study examines the ways in which the Holocaust gets represented in texts written by historians as well as texts written by novelists. I argue that memory is the larger category under which history is subsumed; history is the systematization of memory. Although historians draw on archives and are constrained by their discipline, nevertheless they operate out of their own memories. Psychological transference, repression, denial, projection and reversal shape historians' memories and therefore determine, to a certain extent, …

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The Miskito Settlement Landscape Of Eastern Honduras, With Emphasis On The Moravian Contribution., Benjamin Farr Tillman Jan 1999

The Miskito Settlement Landscape Of Eastern Honduras, With Emphasis On The Moravian Contribution., Benjamin Farr Tillman

LSU Historical Dissertations and Theses

This dissertation documents the influence of Moravian missionary activities on the Miskito settlement landscape in eastern Honduras---particularly in the areas of settlement morphology, housing, agriculture, and cemeteries. Upon their arrival to the Mosquito Coast in 1849, the missionaries employed a three pronged approach consisting of proselyting, medical treatment, and education to convert the majority of the indigenous population. The missionaries' resulting influence was a significant component and major cultural force in the development of a distinctive Protestant region within Catholic Central America. Moravian contributions to the settlement landscape in sixty-four Miskito villages of eastern Honduras were documented through field observations …

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Another New South: Patterns Of Continuity In The Southern Naval Stores Industry., Robert Boone Outland Iii Jan 1999

Another New South: Patterns Of Continuity In The Southern Naval Stores Industry., Robert Boone Outland Iii

LSU Historical Dissertations and Theses

Analysis of southern naval stores production, an industry in many respects more representative of southern economic development than cotton textiles, reveals a pattern of continuity between the antebellum and post-war South. Naval stores manufacturing began in the colonial era but languished as a marginally-profitable business until the 1830s when new uses for spirits of turpentine resulted in increased demand and higher prices. Large turpentine operations developed almost exclusively in eastern North Carolina and the slaves, who performed most of the work, experienced distinct work patterns. By the 1850s, destructive gum-harvesting methods led to the depletion of North Carolina's longleaf pine …

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Front Matter (Pdf), North American Bird Bander Jan 1999

Front Matter (Pdf), North American Bird Bander

North American Bird Bander

No abstract provided.

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Nesting Phenology And Cooperative Breeding Of The Brown-Headed Nuthatch In North Florida Pinelands, Karl E. Miller, Gregory A. Jones Jan 1999

Nesting Phenology And Cooperative Breeding Of The Brown-Headed Nuthatch In North Florida Pinelands, Karl E. Miller, Gregory A. Jones

Florida Field Naturalist

No abstract provided.

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Feeding Ecology Of Black Bears In Northwest Florida, Marty R. Stratman, Michael R. Pelton Jan 1999

Feeding Ecology Of Black Bears In Northwest Florida, Marty R. Stratman, Michael R. Pelton

Florida Field Naturalist

No abstract provided.

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Information For Contributors To The Florida Field Naturalist, Florida Field Naturalist Jan 1999

Information For Contributors To The Florida Field Naturalist, Florida Field Naturalist

Florida Field Naturalist

No abstract provided.

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Breeding Status Of Boat-Tailed Grackles At St. Vincent Island, Franklin County, Florida, Douglas B. Mcnair, Thomas E. Lewis Jan 1999

Breeding Status Of Boat-Tailed Grackles At St. Vincent Island, Franklin County, Florida, Douglas B. Mcnair, Thomas E. Lewis

Florida Field Naturalist

No abstract provided.

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Nest Site Characteristics, Breeding Phenology, And Nesting Success Of American Oystercatchers In Indian River County, Florida, Brian Toland Jan 1999

Nest Site Characteristics, Breeding Phenology, And Nesting Success Of American Oystercatchers In Indian River County, Florida, Brian Toland

Florida Field Naturalist

No abstract provided.

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Environmental Vulnerability And Agriculture In The Karstic Domain: Landscape Indicators And Cases In The Atlas Highlands, Morocco, Brahim Akdim, Mohammed Amyay Jan 1999

Environmental Vulnerability And Agriculture In The Karstic Domain: Landscape Indicators And Cases In The Atlas Highlands, Morocco, Brahim Akdim, Mohammed Amyay

International Journal of Speleology

After the brief presentation of the major karstic areas in Morocco, the article focused essentially on the Atlas mountains to investigate the impact of the agriculture on the natural systems equilibrium. Socio-economic changes (demographic pressure, escalation of the landscape use, utilisation of new techniques in water harvesting, etc...) have sometimes fathered mechanisms of degradation. Many indicators seem to reflect these mechanisms. The pedologic indicators, soil erosion, the hydrologic and geomorphic indicators, are apprehended to demonstrate existent correlation between different variables and the often negative impacts of land over-use in the karstic domain of the Middle Atlas.

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Interaction Between Karst, Water And Agriculture Over The Climatic Gradient Of Israel, Amos Frumkin Jan 1999

Interaction Between Karst, Water And Agriculture Over The Climatic Gradient Of Israel, Amos Frumkin

International Journal of Speleology

The dry climate of Israel and the karstic nature of its rocks have always imposed human innovation for utilisation of water resources and agriculture. Large perennial karst springs are available only in the lowlands, but sophisticated water supply systems were built both in the lowland and highland regions. Marl layers interbedded within carbonates give rise to local perched springs and allow terrace construction. Deforestation has taken place for some 4000 years, causing intense soil erosion, but terraces have reduced this impact.

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