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2007

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Fluid Flow In The Central North Slope Foreland Basin, Alaska, Anna Marie Bélanger Jan 2007

Fluid Flow In The Central North Slope Foreland Basin, Alaska, Anna Marie Bélanger

LSU Master's Theses

Previous studies of the areal variations in heat flow and spatial variations in formation water salinity and hydraulic head are consistent with the existence of a currently active, topographically-driven regional fluid flow regime in the National Petroleum Reserve Alaska (NPRA) portion of the western North Slope foreland basin. This conclusion is also supported by the results of numerical modeling of fluid flow and heat transport in the area. This work has now been extended to the east. The results of this study demonstrate that the Permian though Cenozoic age sediments of the central North Slope foreland basin have been significantly …

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Quasi Group Based Crypto-System, Maruti Venkat Kartik Satti Jan 2007

Quasi Group Based Crypto-System, Maruti Venkat Kartik Satti

LSU Master's Theses

For electronic commerce and other applications it is required to encrypt data that is transmitted over an unsecured channel. The data is encrypted/randomized using a key. Algorithms such as DES and ECC randomize the data such that un-authorized user cannot decrypt it .This thesis presents a practical implementation of a quasi group based multilevel, indexed scrambling transformation for use in signal encryption. Results of experiments with text and speech scrambling are presented. It is shown that the quasi group transformation maximizes the entropy at the output, which is desirable for a good system. This system provides extremely large group of …

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Empirical Modeling Of Late Quaternary Sediment Supply To The Gulf Of Mexico Shelf Margin In A Cool Lowstand World, Jill Hattier Womack Jan 2007

Empirical Modeling Of Late Quaternary Sediment Supply To The Gulf Of Mexico Shelf Margin In A Cool Lowstand World, Jill Hattier Womack

LSU Master's Theses

During the last glacial period, river systems responded to the lowering of sea level by incising valleys, extending across the continental shelf, and depositing deltas on the shelf margin and upper slope of surrounding basins. These deltas represent important repositories for sediment delivered to the coastal ocean and provide partial records of sediment discharged from continental landmasses. Over relatively short time scales, like that of the last glacial-interglacial cycle, hinterland drainage areas, relief and lithology can be considered constants while the primary variable of significance is climate change (Syvitski and Milliman, 2007). It is reasonable to assume, therefore, that supply …

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Properties Of Silica-Polypeptide Composite Particles, Jianhong Qiu Jan 2007

Properties Of Silica-Polypeptide Composite Particles, Jianhong Qiu

LSU Doctoral Dissertations

Studies of grafting polymer on surfaces with chemical bonds started in the 1970’s, but few projects have focused on grafting polypeptide on spherical particles. In this research, polypeptides poly(å-carbobenzyloxy-L-lysine) (PCBL) or poly(ã-benzyl-L-glutamate) (PBLG) were grafted on silica sphere surfaces by using the “grafting from” method. The polypeptide-grafted silica spheres are called SiPCPs. The growth of polypeptide chains as a function of monomer amount and reaction time was explored. The properties of a mixture of PBLG rod-like polymer and PBLG SiPCPs were investigated. At high concentrations of these two components, the phase behavior was studied. At low concentrations of PBLG, the …

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Carbonated Sections From Komatiite Flow- Top Alteration Zones In The Barberton Greenstone Belt: Implications For Near-Surface Archean Environments, Judith E. F. Stoute Jan 2007

Carbonated Sections From Komatiite Flow- Top Alteration Zones In The Barberton Greenstone Belt: Implications For Near-Surface Archean Environments, Judith E. F. Stoute

LSU Master's Theses

Over a dozen komatiitic flows in the 3.2-3.5 Ga Barberton Greenstone Belt are topped with unique green silica- and carbonate-rich rocks, which likely formed from interaction of the cooling lava flow with seawater shortly after deposition. This study focuses on an alteration zone in the Mendon Formation. Two styles of alteration are observed in this alteration zone: silicification and carbonation. The goal of this study is to characterize the carbonates in the alteration zone, constrain the timing of alteration, test whether the alteration zones are due to interaction with seawater after deposition, and estimate the elemental fluxes between the rock …

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Saltwater Intrusion Simulation In Heterogeneous Aquifer Using Lattice Boltzmann Method, Borja Servan Camas Jan 2007

Saltwater Intrusion Simulation In Heterogeneous Aquifer Using Lattice Boltzmann Method, Borja Servan Camas

LSU Master's Theses

This study develops a saltwater intrusion simulation model using a lattice Boltzmann method (LBM) in a two-dimensional coastal confined aquifer. The saltwater intrusion is described by density-dependent groundwater flow and mass transport equations, where a freshwater-saltwater mixing zone is considered. The problem is formulated in terms of hydraulic head instead of pressure, which is recommended in those cases where static pressures dominate to reduce computational cost. The aquifer heterogeneity is explicitly a function of the speed of sound, relaxation parameter and time steps in the LBM. This study explores the equivalent squared sound speed to deal with the spatial-temporal heterogeneity …

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The Disciples Of Light: A Way Of Seeing And The Educational Transfer Of Ideas Linking Spirituality And Art Among Southern Painters In The Hensche-Hawthorne Tradition, Barbara Naron Faulkner Jan 2007

The Disciples Of Light: A Way Of Seeing And The Educational Transfer Of Ideas Linking Spirituality And Art Among Southern Painters In The Hensche-Hawthorne Tradition, Barbara Naron Faulkner

LSU Doctoral Dissertations

This study examines the role of artistic education in shaping artistic beliefs and personal philosophy. Its central focus is the origins of a common belief among artists that artmaking or aesthetic response to art can be a form of spiritual activity or experience leading to spiritual insight. The primary data for this study is a series of in-depth oral history interviews with seven painters who studied with Henry Hensche at The Cape School of Art in Provincetown, MA, a school of American plein air painting that is linked with Impressionism. Charles W. Hawthorne, a painter who was a protégé of …

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Providing The Best Of Both Worlds: Balancing Conservation And Recreation In A System Of Protected Areas In Texas, Kellen Allison Smith Jan 2007

Providing The Best Of Both Worlds: Balancing Conservation And Recreation In A System Of Protected Areas In Texas, Kellen Allison Smith

LSU Master's Theses

Societies are becoming increasingly urban and isolated from natural areas. Protecting certain natural areas is vital for building and maintaining resilience in ecological systems for the continued conservation of biodiversity and provision of ecological services. The International Union for the Conservation of Nature and Natural Resources (IUCN) promotes the development of systems of protected areas within nations and regions as a sustainable means of preserving the biodiversity within natural areas. Allowing sustainable ecotourism and wildlife-based recreation activities in protected areas can provide economic incentives to surrounding communities making protection an attractive alternative to more extractive forms of land use. Managing …

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Environmental Equity In Southeast Louisiana: Oil, People, Policy, And The Geography Of Industrial Hazards, Scott Allan Hemmerling Jan 2007

Environmental Equity In Southeast Louisiana: Oil, People, Policy, And The Geography Of Industrial Hazards, Scott Allan Hemmerling

LSU Doctoral Dissertations

This dissertation explores issues and concepts underlying the creation of Louisiana’s rural-industrial petrochemical complex as they relate to environmental equity and industrial development’s deleterious consequences. Cumulative hazards models examine the distribution of technological hazards associated with petroleum extraction and processing and explores how this varies among different socioeconomic groups in three coastal Louisiana parishes. Considerable onshore oil extraction occurs in Jefferson Parish. Lafourche Parish is the primary land-based supply center for the majority of the offshore oil activity in the Gulf of Mexico. The refineries of Saint Bernard Parish represent the endpoint of the flow of raw product and the …

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Evaluation Of Anuran Richness In Restored Wetlands Of Central Louisiana, Sarah Jane Barlow Jan 2007

Evaluation Of Anuran Richness In Restored Wetlands Of Central Louisiana, Sarah Jane Barlow

LSU Master's Theses

Bottomland hardwood forests and associated fauna, including frogs, are disappearing. The 1990 Farm Bill created a wetland restoration program on private lands called the Wetland Reserve Program (WRP) that has the potential to reverse the declines in species associated with bottomland hardwood forests. As of September 2005, nearly 85,000 ha had been enrolled in Louisiana, but the structure and value of these wetlands to frogs is not known. I evaluated 22 restored and 8 reference wetlands from January through May in 2004 and 2005 to determine the effects of local and landscape scale habitat characteristics on frog species richness and …

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Land-Cover And Land-Use Study Using Genetic Algorithms, Petri Nets, And Cellular Automata, Fei Wang Jan 2007

Land-Cover And Land-Use Study Using Genetic Algorithms, Petri Nets, And Cellular Automata, Fei Wang

LSU Doctoral Dissertations

Recent research techniques, such as genetic algorithm (GA), Petri net (PN), and cellular automata (CA) have been applied in a number of studies. However, their capability and performance in land-cover land-use (LCLU) classification, change detection, and predictive modeling have not been well understood. This study seeks to address the following questions: 1) How do genetic parameters impact the accuracy of GA-based LCLU classification; 2) How do image parameters impact the accuracy of GA-based LCLU classification; 3) Is GA-based LCLU classification more accurate than the maximum likelihood classifier (MLC), iterative self-organizing data analysis technique (ISODATA), and the hybrid approach; 4) How …

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Mechanistic Modeling Of An Underbalanced Drilling Operation Utilizing Supercritical Carbon Dioxide, Faisal Abdullah Aladwani Jan 2007

Mechanistic Modeling Of An Underbalanced Drilling Operation Utilizing Supercritical Carbon Dioxide, Faisal Abdullah Aladwani

LSU Doctoral Dissertations

Mechanistic modeling of an underbalanced drilling operation using carbon dioxide has been developed in this research. The use of carbon dioxide in an underbalanced drilling operation eliminates some of the operational difficulties that arises with gaseous drilling fluids, such as generating enough torque to run a downhole motor. The unique properties of CO2, both inside the drill pipe and in the annulus are shown in terms of optimizing the drilling operation by achieving a low bottomhole pressure window. Typically CO2 becomes supercritical inside the drill pipe at this high density; it will generate enough torque to run …

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Statutory Speed Bumps: The Roles Third Parties Play In Tax Compliance, Leandra Lederman Jan 2007

Statutory Speed Bumps: The Roles Third Parties Play In Tax Compliance, Leandra Lederman

Articles by Maurer Faculty

Recent legal and economic scholarship has recognized that the government can use structural systems as an efficient way to reduce prohibited behavior. The federal tax system employs structural mechanisms, such as withholding taxes, to foster compliance. The use of structural systems to reduce tax evasion need not be limited to tax administration, however. The Article argues that substantive federal income tax law can - and in many contexts does - foster compliance by harnessing the structural incentives of third parties. Although this phenomenon has gone largely unnoticed, third parties are routinely used by the tax system to verify the bona …

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First Year Spanish Course Curriculum, Anna Carpenter Jan 2007

First Year Spanish Course Curriculum, Anna Carpenter

Undergraduate Theses and Senior Projects

No abstract provided.

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Oregon Spartina Response Plan, Mary Pfauth, Mark Sytsma, Dennis Isaacson Jan 2007

Oregon Spartina Response Plan, Mary Pfauth, Mark Sytsma, Dennis Isaacson

Center for Lakes and Reservoirs Publications and Presentations

Four introduced, invasive species of Spartina (cordgrass) have been present in estuarine areas of the U.S. west coast for over a century. These Spartina species are ecological engineers- they cause severe alternations in the hydrology and food webs of invaded estuaries that are detrimental to native wildlife and commercial and recreational uses. Oregon has been relatively free of these weeds, with only two known infestations. One infestation was eradicated by Oregon Department of Agriculture and the other is currently under eradication by The Nature Conservancy.

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The Extent Of Interaction Between The Scallop And Prawn Fleets In The Shark Bay Scallop Managed Fishery, John Dickson Jan 2007

The Extent Of Interaction Between The Scallop And Prawn Fleets In The Shark Bay Scallop Managed Fishery, John Dickson

Theses : Honours

The Shark Bay Managed Scallop Fishery is Western Australia's most important scallop fishery with an annual value of between $2 and $58 million. In addition to this the fishery is an important source of regional employment with approximately 160 skippers and crew employed during the 2005 season. Two separate fleets are permitted to fish for scallops in this fishery, the first consisting of dedicated scallop fishing vessels (Class A licences) and the second of prawn fishing vessels (Class B licences) that are allowed to take scallops under a catch sharing arrangement. Concerns exist over the interactions between these two fleets …

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Teachers Experiences With Teaching Children With Learning Difficulties: A Qualitative Study, Aleesha Morton Jan 2007

Teachers Experiences With Teaching Children With Learning Difficulties: A Qualitative Study, Aleesha Morton

Theses : Honours

It is estimated that 16% of Australian primary school students suffer from a learning difficulty (LD) (Rivalland, 2000). Teachers are expected to provide these students with the specialised education they need. However, teachers have reported that they face numerous challenges to provide LD students with the support needed, which may result in them experiencing high levels of stress and anxiety. These challenges include problems with identification of the specific difficulty and the most appropriate intervention programs to implement, a lack of pre service education and training, insufficient resources and funding specific to students with LD. Awareness and understanding of these …

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A Descriptive Survey Of Undergraduate Nursing Students' Perceptions Of Desirable Leadership Qualities Of Nurse Preceptors, Melanie Zilembo Jan 2007

A Descriptive Survey Of Undergraduate Nursing Students' Perceptions Of Desirable Leadership Qualities Of Nurse Preceptors, Melanie Zilembo

Theses : Honours

Leadership in the nursing profession has gained much attention over the previous decade. However, there is a paucity of literature examining the context of leadership within the clinical preceptor/undergraduate nursing student relationship and the relevance of this to the clinical learning environment. Globally, the nursing profession is experiencing a climbing attrition rate, an accelerating ageing workforce and a trend toward part-time employment. Practical experience is based upon a preceptored model of supervision creating a potential for inconsistencies for student supervision and assessment within this mode of education. The purpose of this study was to explore, from the perspective of the …

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An Investigation Into The Effectiveness Of Paired Reading With The Incorporation Of Additional Error Corrective Procedures, Kathryn Schneider Jan 2007

An Investigation Into The Effectiveness Of Paired Reading With The Incorporation Of Additional Error Corrective Procedures, Kathryn Schneider

Theses : Honours

The aim of this literature review was to examine the effectiveness of the Paired Reading (PR) intervention, a one-to-one instruction approach to improving children's fluency, accuracy, and comprehension. The effectiveness of PR in promoting a positive attitude towards reading and in increasing children's sense of self-efficacy in reading was also investigated, focusing principally on children whose level of reading was below what was expected for their chronological age. It addressed the question of how well the intervention can be implemented by parents and explored the strategies used in PR to elucidate what aspects of the intervention may contribute to its …

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Users' Perspectives And Attitudes Towards Web Application Security, Leonard Ticualu Jan 2007

Users' Perspectives And Attitudes Towards Web Application Security, Leonard Ticualu

Theses : Honours

The Internet has become an integral part of the society in many parts of the world. However, as the Internet becoming more important and useful, the problems with Web security have also increased. More people today have experienced Web security threats such as viruses, spyware, keyloggers, and phishing; and a not insignificant number have encountered financial fraud because of the online activities they conducted. This research investigated the security concerns and level of awareness of users in regards to the use of web applications, by identifying users' concerns of web applications, examining the relationship of users' technical knowledge and users' …

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The Needs Of Western Australian Parents Of Children With An Autism Spectrum Disorder, As Influenced By The Age Of The Child, Kerry Stedman Jan 2007

The Needs Of Western Australian Parents Of Children With An Autism Spectrum Disorder, As Influenced By The Age Of The Child, Kerry Stedman

Theses : Honours

Autism Spectrum Disorders (ASD) impact upon parental stress levels above and beyond other childhood disorders. Nevertheless, little systematic research has been done on the perceived needs of parents of children with ASD. The literature has, however, reported that having a child with ASD impacts upon parental well being. These parents report increased levels of stress, depression, dysphoria, fear and marital difficulties as well as other problems. Although there is a debate in current research as to whether the age of the child with ASD affects parental well being, much of the body of knowledge suggests that different stressors and needs …

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An Exploration Of Thresholds Of Tolerance For Changes To Sanctuary Zones Among Repeat Tourists: A Case Of Ningaloo Marine Park, Natasha Nicholson Jan 2007

An Exploration Of Thresholds Of Tolerance For Changes To Sanctuary Zones Among Repeat Tourists: A Case Of Ningaloo Marine Park, Natasha Nicholson

Theses : Honours

As environmental issues become more prevalent in today' s society, natural area managers must find ways to balance the increased popularity of natural areas for recreation with environmental protection and conservational goals. One popular method to achieve this balance is through restrictions. Sanctuary zones are one type of restriction and are generally designated areas that prohibit extractive uses of natural resources, such as fishing. This study qualitatively explores the issues that affect a repeat tourist's tolerance threshold for changes to their recreational activities caused by restrictions within the Ningaloo Marine Park. This study seeks to assist natural area managers to …

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A Comparison Of Edge Detection Methods For Segmentation Of Skin Lesions In Mobile-Phone-Quality Images, Khanh Linh Hua Jan 2007

A Comparison Of Edge Detection Methods For Segmentation Of Skin Lesions In Mobile-Phone-Quality Images, Khanh Linh Hua

Theses : Honours

The world is faced with a rapidly increasing number of skin cancers every year. Melanoma is the most deadly type of skin cancer though it can be treated if it has been detected at an early stage. However, there is a shortage of dermatologists in rural areas. The increasing number of camera phones, together with improved coverage in rural areas gives some potential for tele-dermatology, whereby people with no local access to a dermatologist can send images of suspicious skin lesions to an expert for assessment. Merely relaying images to a human expert solves only part of the problem, there …

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Educating Engineers For The 21st. Century: And Why Some Elements Of History And Philosophy Should Be Incorporated Into The Curriculum, William Grimson, Mike Murphy, Eugene Coyle Jan 2007

Educating Engineers For The 21st. Century: And Why Some Elements Of History And Philosophy Should Be Incorporated Into The Curriculum, William Grimson, Mike Murphy, Eugene Coyle

Conference papers

It has been said that in some respects the Russian composer Igor Stravinsky was a magpie – borrowing styles and ideas from diverse sources for whatever musical project he was working on. The practice of engineering has this same characteristic in that it willingly takes ideas, knowledge and techniques from wherever in pursuit of completing its goal. Further, Engineering is, at least in part, in agreement with Fyodor Dostoevsky – ‘if everything on Earth were rational, nothing would happen’. Against such a background it is proposed that a framework based on both philosophy and the history of engineering, science and …

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Acadian Biospeleology: Composition And Ecology Of Cave Fauna Of Nova Scotia And Southern New Brunswick, Canada, Max Moseley Jan 2007

Acadian Biospeleology: Composition And Ecology Of Cave Fauna Of Nova Scotia And Southern New Brunswick, Canada, Max Moseley

International Journal of Speleology

The vertebrate and invertebrate fauna, environment and habitats of caves and disused mines in Nova Scotia and southern New Brunswick are provisionally catalogued and described, based on field collections made over many years. The area was glaciated and the subterranean fauna consists of non-troglobites all of which have arrived and colonised the caves during or following final recession of the Pleistocene glaciers. The statistical composition of the fauna at the higher taxonomic level is similar to that in Ontario, but is less species rich and there are some notable ecological and other differences. Porcupine dung accumulations are an important habitat …

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Sails: A New Gypsum Speleothem From Naica, Chihuahua, Mexico, Tullio Bernabei, Paolo Forti, Roberto Villasuso Jan 2007

Sails: A New Gypsum Speleothem From Naica, Chihuahua, Mexico, Tullio Bernabei, Paolo Forti, Roberto Villasuso

International Journal of Speleology

The caves of Naica (Chihuahua, Mexico) are perhaps the most famous mine caves of the world due to the presence of gigantic gypsum crystals. Nevertheless, very little research has been carried out on this karst area until now. A multidisciplinary investigation started in 2006 with the aim not only to define the genesis and the age of the Naica gypsum crystals, but also on other scientific aspects of these caves. This paper describes a completely new type of gypsum speleothem: the “sails”, observed only inside the Cueva de las Velas, one of the caves of the Naica system. This speleothem …

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Bomb-Spike Dating Of A Mummified Baboon In Ludwig Cave, Namibia, Greg Hodgins, George A. Brook, Eugene Marais Jan 2007

Bomb-Spike Dating Of A Mummified Baboon In Ludwig Cave, Namibia, Greg Hodgins, George A. Brook, Eugene Marais

International Journal of Speleology

In 1982 a mummified adult female baboon was discovered on a ledge in Ludwig Cave in Namibia. A toe bone was removed for dating in July 1995. AMS radiocarbon dating of bone collagen, tendon, and skin indicates a post-modern age. Application of the atomic bomb-spike calibration curve suggests death in late 1977 and an age at death of around 19 years. Baboons roost in the cave and the mummified female, along with a mummified juvenile male discovered in 2002 and three rotting corpses discovered in 1995, were probably chased by other baboons or by leopards down a ca. 6 m …

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Petrographic And Geochemical Study On Cave Pearls From Kanaan Cave (Lebanon), Fadi H. Nader Jan 2007

Petrographic And Geochemical Study On Cave Pearls From Kanaan Cave (Lebanon), Fadi H. Nader

International Journal of Speleology

The Kanaan cave is situated at the coastal zone, north of Beirut City (capital of Lebanon). The cave is located within the upper part of the Jurassic Kesrouane Formation (Liassic to Oxfordian) which consists mainly of micritic limestone. Twenty seven cave pearls were subjected to petrographic (conventional and scanning electron microscopy) and geochemical analyses (major/trace elements and stable isotopes). The cave pearls were found in an agitated splash-pool with low mud content. They are believed to have formed through chemical precipitation of calcite in water over-saturated with calcium. The nucleus and micritic laminae show δ18OV-PDB values of …

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Phenomenographic Study Of Students’ Problem Solving Approaches In Physics, Laura Walsh, Robert Howard, Brian Bowe Jan 2007

Phenomenographic Study Of Students’ Problem Solving Approaches In Physics, Laura Walsh, Robert Howard, Brian Bowe

Articles

This paper describes ongoing research investigating student approaches to quantitative and qualitative problem solving in physics. This empirical study was conducted using a phenomenographic approach to analyze data from individual semistructured problem solving interviews with 22 introductory college physics students. The main result of the study is a hierarchical set of categories that describe the students’ problem solving approaches in the context of introductory physics.

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A Theory And Practice Of Website Engagibility, Ronan Fitzpatrick Jan 2007

A Theory And Practice Of Website Engagibility, Ronan Fitzpatrick

Doctoral

This thesis explores the domain of website quality. It presents a new study of website quality - an abstraction and synthesis, a measurement methodology, and analysis - and proposes metrics which can be used to quantify it. The strategy employed involved revisiting software quality, modelling its broader perspectives and identifying quality factors which are specific to the World Wide Web (WWW). This resulted in a detailed set of elements which constitute website quality, a method for quantifying a quality measure, and demonstrating an approach to benchmarking eCommerce websites. The thesis has two dimensions. The first is a contribution to the …

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