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2008

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Determination Of Ctv-To-Itv Margin For Free-Breathing Respiratory-Gated Treatments Using 4dct And The Novalis Exactrac Gating System With Implanted Fiducials, Jason Edward Matney Jan 2008

Determination Of Ctv-To-Itv Margin For Free-Breathing Respiratory-Gated Treatments Using 4dct And The Novalis Exactrac Gating System With Implanted Fiducials, Jason Edward Matney

LSU Master's Theses

The purpose of this project was to investigate the interplay between gating window characteristics and target margin required to compensate for residual motion during the gating window. This project investigated the accuracy of ExacTrac and 4DCT imaging localizing an implanted coil at various phases of respiration. Radiochromic film measured delivered dose patterns for selected gating intervals over a variety of respiratory patterns. In order to establish accurate dosimetry, this project implemented and tested an EBT radiochromic film dosimetry system. Film testing showed that the performance of a medical grade Vidar Dosimetry Pro radiographic film scanner and an Epson V700 Photo …

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Opportunities And Challenges Associated With Development Of Wood Biomass Energy Production In Louisiana, Anil Raj Kizhakkepurakkal Jan 2008

Opportunities And Challenges Associated With Development Of Wood Biomass Energy Production In Louisiana, Anil Raj Kizhakkepurakkal

LSU Master's Theses

Wood residue produced by forest products industry has been recognized as a potential fuel that can generate energy to run the industry. A survey was done among forest products industry to get a general idea about energy produced from woody biomass created from forest industry in Louisiana, USA. The industry was classified into primary and secondary forest products industry. The study provided information regarding utilization and wastage of wood residue. Survey response rate was 25 percent. It addressed problems faced by wood residue energy development and came up with solution to solve them. When survey results were compared to previous …

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Dynamic Workflow Management For Large Scale Scientific Applications, Emir Mahmut Bahsi Jan 2008

Dynamic Workflow Management For Large Scale Scientific Applications, Emir Mahmut Bahsi

LSU Master's Theses

The increasing computational and data requirements of scientific applications have made the usage of large clustered systems as well as distributed resources inevitable. Although executing large applications in these environments brings increased performance, the automation of the process becomes more and more challenging. The use of complex workflow management systems has been a viable solution for this automation process. In this thesis, we study a broad range of workflow management tools and compare their capabilities especially in terms of dynamic and conditional structures they support, which are crucial for the automation of complex applications. We then apply some of these …

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Komatiitic Flows Of The Pioneer Ultramafic Complex Of The 3.3ga Weltevreden Formation, Barberton Greenstone Belt, South Africa: Stratigraphy, Petrology, And Geochemistry, Marc Romain Cooper Jan 2008

Komatiitic Flows Of The Pioneer Ultramafic Complex Of The 3.3ga Weltevreden Formation, Barberton Greenstone Belt, South Africa: Stratigraphy, Petrology, And Geochemistry, Marc Romain Cooper

LSU Master's Theses

The 3.29 Ga Pioneer Ultramafic Complex (WPC) is a 1 km thick east-northeast trending tilted (90° dip) section of layered ultramafic rock in the Weltevreden Formation in the west-northwest region of the Barberton Greenstone Belt (BGB). It was originally interpreted as an intrusive complex with slaty zones that have a linear horizontal fabric produced by shear. However, a recent study identifies these slaty zones as komatiitic tuffs and attributes their horizontal fabric to plane and cross bedding. The present study suggests the non-slaty zones are extrusive komatiitic flows with abundant pyroxene spinifex tops, normal volcanic textures and crystal sizes, and …

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Design Of A Fully Autonomous Mobile Pipeline Exploration Robot (Famper), Jong-Hoon Kim Jan 2008

Design Of A Fully Autonomous Mobile Pipeline Exploration Robot (Famper), Jong-Hoon Kim

LSU Master's Theses

Pipelines have been an integral part of our constructions for many centuries. However, need to be maintained, and the cost of maintenance continues to increase. Robots have been considered as an attractive alternative, and many different types of pipeline robots have been proposed in the past. Unfortunately many of them work under only very restricted environments such as customized pipelines, often have no vertical mobility, or can traverse through only a simple pipeline structure due to wired control. This thesis presents the design and implementation of a robot based on novel idea we call “caterpillar navigational mechanism”. A Fully Autonomous …

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Nanoclay Reinforced Polymer Composite And Its Application To Hybrid Composite Structures, Gefu Ji Jan 2008

Nanoclay Reinforced Polymer Composite And Its Application To Hybrid Composite Structures, Gefu Ji

LSU Master's Theses

The purpose of this study was to find the optimum mixing technique that leads to maximum gain in mechanical, thermal, and fire-retardant properties of vinyl ester based nanocomposites. Specifically, five combinations of incremental mixing intensity were applied to five groups of samples that were made of vinyl ester resin reinforced by 1 wt. % of montmorillonite (MMT). Changes in mechanical properties associated with each mixing combination were examined through a variety of tests, which were low velocity impact test, bending test, compression test, and dynamic mechanical analysis (DMA). Additionally, changes in thermal properties (e.g., thermal diffusivity, glass transition temperature) and …

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A Capacity-Approaching Coded Modulation Scheme For Non-Coherent Fading Channels, Youngjeon Cho Jan 2008

A Capacity-Approaching Coded Modulation Scheme For Non-Coherent Fading Channels, Youngjeon Cho

LSU Master's Theses

Approaching the Shannon limit of the communication channels has been studied by many researchers to efficiently and reliably transmit data through the channels. To solve this problem, various methods and schemes have been proposed for approaching the theoretical limit for Shannon’s channel capacity. Among them, both low-density parity check (LDPC) codes and Turbo codes have been proposed to minimize the bit error rate (BER). Therefore, understanding of LDPC codes and Turbo codes is useful for their applications in modern communication systems. The study about non-coherent channels, which do not require explicit knowledge or estimation of the channel state information, has …

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The "Stern Review" And Its Critics: Implications For The Theory And Practice Of Benefit-Cost Analysis, Daniel H. Cole Jan 2008

The "Stern Review" And Its Critics: Implications For The Theory And Practice Of Benefit-Cost Analysis, Daniel H. Cole

Articles by Maurer Faculty

The UK's Treasury's "Stern Review: The Economics of Climate Change" (Oct. 2006) reached dramatically different conclusions and policy recommendations than most earlier economic analyses of climate change. It found that the costs of climate change, as well as the potential net benefits of greenhouse gas reductions, were much higher that previously estimated, and consequently recommended more rapid and extensive cuts in emissions than other economist analysts. The Stern Review estimated that a 1% annual investment of global GDP in mitigation could prevent a 5% (or more) reduction in annual global GDP from climate change harm, forever. A number of prominent …

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Non-Industrial Private Forest Landowners And Us Home Center Retailers' Attitudes And Perceptions Of Forest Certification, Polwattage Kushil Perera Jan 2008

Non-Industrial Private Forest Landowners And Us Home Center Retailers' Attitudes And Perceptions Of Forest Certification, Polwattage Kushil Perera

LSU Master's Theses

The concept of forest certification, a relatively recent development in forestry, is based on the use of market-based incentives to encourage sustainable forest management practices. Since the majority of forests in US South are privately owned, certifying forests owned by non-industrial private forest (NIPF) landowners is an important issue. From the demand perspective of certification, pressure from non-governmental environmental organizations and consumer awareness has prompted major wood products retailers to state preferences for certified wood products. In the US, wood product demand in the retail home centers sector is second only to the home building industry. In addition, home center …

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Synthesis Of Disubstituted Amino Acids And Peptide Inhibitors Of Amyloid Beta Aggregation, Gregory Todd Mccandless Jan 2008

Synthesis Of Disubstituted Amino Acids And Peptide Inhibitors Of Amyloid Beta Aggregation, Gregory Todd Mccandless

LSU Master's Theses

The aggregation process of amyloid beta from monomeric peptide to oligomers and fibrils is believed to be connected with the neurological disorder Alzheimer’s disease. The focus of this research is the synthesis of alpha, alpha-disubstituted amino acids and peptide inhibitors of amyloid beta aggregation. The inhibitors are designed to interrupt (or alter) this process by binding to amyloid beta’s central hydrophobic core region (residues 17-20, Leucine-Valine- Phenylalanine-Phenylalanine). Target specificity is achieved via self recognition by basing the inhibitors on the sequence in this region. The inclusion of disubstituted amino acids in the sequence of the inhibitors will provide a blocking …

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Long-Term Subsidence And Compaction Rates: A New Model For The Michoud Area, South Louisiana, Clint H. Edrington Jan 2008

Long-Term Subsidence And Compaction Rates: A New Model For The Michoud Area, South Louisiana, Clint H. Edrington

LSU Master's Theses

This study examined the stratigraphic record of the Michoud area in East New Orleans, Louisiana to address questions concerning the magnitude of, and processes leading to land-surface subsidence. The hypotheses under review are based on recent geodetic studies, which challenge the widely held position that modern subsidence is primarily a function of shallow sediment compaction. Testing these hypotheses involved constructing a structural cross section of the Michoud area using well logs, chronostratigraphic data, and fault picks, so as to evaluate differential motion along specific faults through time. Employing ages and corrected depths for three key subsurface horizons, long-term (Middle Miocene …

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The Relationship Between Early Cumulative Caregiver Sensitivity And Children's Later Self-Perception Of Cognitive Competence And Cognitive Performance, Jenna Rae Watson Jan 2008

The Relationship Between Early Cumulative Caregiver Sensitivity And Children's Later Self-Perception Of Cognitive Competence And Cognitive Performance, Jenna Rae Watson

LSU Master's Theses

The purpose of the study was to examine the relationship between children’s experiences of caregiver sensitivity during the first three years of their life and their later self-perceptions of cognitive competence and cognitive performance. Caregiver sensitivity was measured using data that had been collected with the Caregiver Interaction Scale (CIS, Arnett, 1989) during an earlier longitudinal study, the Baton Rouge Early Care Study (BRECES; Pierce & Benedict, 2007). Measures of cognitive competence were derived using the Pictorial Scale of Perceived Competence and Social Acceptance for Young Children (Harter & Pike, 1984) and measures of cognitive performance were derived using the …

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Pet/Ct Detectability And Classification Of Simulated Pulmonary Nodules Using An Suv Correction Scheme, Andrew Nicholas Morrow Jan 2008

Pet/Ct Detectability And Classification Of Simulated Pulmonary Nodules Using An Suv Correction Scheme, Andrew Nicholas Morrow

LSU Master's Theses

Positron emission tomography (PET) and computed tomography (CT) together are a powerful diagnostic tool, but imperfect image quality contributes to false positive and false negative diagnoses by an observer despite experience and training. This work investigated a PET standard uptake value (SUV) correction scheme, based on partial volume effect (PVE), on the classification of lesions as benign or malignant in PET/CT images. The correction scheme comprised several steps. The observer drew a region of interest (ROI) around the lesion using the CT dataset. The ROI was blurred with the assumed point spread function (PSF) of the PET scanner then re-sampled …

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The Use Of Extractable Lipofuscin For Age Determination Of Crustaceans: Reply To Sheehy (2008), H. Rodger Harvey, David H. Secor, Se-Jong Ju Jan 2008

The Use Of Extractable Lipofuscin For Age Determination Of Crustaceans: Reply To Sheehy (2008), H. Rodger Harvey, David H. Secor, Se-Jong Ju

OES Faculty Publications

The heterogeneous mixture of metabolic by-products termed lipofuscin (LF) or age pigments has long been known to accumulate in post mitotic cells with increasing age. In crustaceans several approaches have been developed over the years to track LF accumulation and provide a proxy for chronological age. Histological approaches have been traditionally used for LF determination of crustaceans (e.g. Sheehy et al. 1994, Mar Biol 121:237-245), but over the last decade extraction approaches for neural tissues have been introduced (Ju et al. 1999, Mar Ecol Prog Ser 185:171-179) and tested (Ju et al. 2001, Mar Ecol Prog Ser 224:197-205; 2003, Fish …

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Turbulent Lifestyle: Microbial Mats On Earth’S Sandy Beaches—Today And 3 Billion Years Ago, Nora Noffke Jan 2008

Turbulent Lifestyle: Microbial Mats On Earth’S Sandy Beaches—Today And 3 Billion Years Ago, Nora Noffke

OES Faculty Publications

Archean Earth history is very difficult to reconstruct. Until recently, only bacterial cells preserved in chert, microborings, and stromatolites provided the few clues to ancient life. Now, siliciclastic “microbially induced sedimentary structures” (MISS) are adding to our knowledge of both past life and paleoenvironments. MISS rise from the interaction of photoautotrophic microbial mats with physical sediment dynamics in siliciclastic, shallow-marine settings. Archean MISS can be understood through observations of living microbial mats and modern biotic-physical sedimentary processes. Such geobiological studies are key to the interpretation of the early evolution of prokaryotes. For example, the 2.9 Ga Pongola Supergroup, South Africa, …

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The Indefinite Metric Of R. Mrugala And The Geometry Of The Thermodynamical Phase Space, Serge Preston, James Vargo Jan 2008

The Indefinite Metric Of R. Mrugala And The Geometry Of The Thermodynamical Phase Space, Serge Preston, James Vargo

Mathematics and Statistics Faculty Publications and Presentations

We study an indefinite metric G which was introduced by R. Mrugala and is defined on the contact phase space (P, θ) of a homogeneous thermodynamical system. We describe the curvature properties and the isometry group of the metric G. We established an isomorphism of the space (P, θ, G) with the Heisenberg Lie group Hn, endowed with the right invariant contact structure and the right invariant indefinite metric. The lift of the metric G to the symplectization of contact space (P, θ) and its properties are studied. Finally we introduce the "hyperbolic projectivization" of the space …

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Photocatalytic Oxidation Of Ethanol Using Macroporous Titania, Gibert Merle Magpantay Jan 2008

Photocatalytic Oxidation Of Ethanol Using Macroporous Titania, Gibert Merle Magpantay

LSU Master's Theses

Photocatalytic oxidation (PCO) using TiO2 is a potential means of remediating poor indoor air quality that is attributed to low levels of volatile organic compounds (VOC). In this work, ethanol is chosen as a simple compound representative of VOC’s. The aim of this research is to establish a baseline for the photocatalytic activity of TiO2 in ethanol PCO as well as the photonic efficiency of the photoreactor. The PCO conversion could then be enhanced by using photocatalyst having a macroporous structure. A flat plate photoreactor, UV light delivery and a flow system was designed in this work to accomplish ethanol …

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Experimental And Numerical Investigation Of Fluid Flow And Heat Transfer In Microchannels, Wynn Allen Phillips Jan 2008

Experimental And Numerical Investigation Of Fluid Flow And Heat Transfer In Microchannels, Wynn Allen Phillips

LSU Master's Theses

Microchannels are of current interest for use in heat exchangers where very high heat transfer performance is desired. Microchannels provide very high heat transfer coefficients because of their small hydraulic diameters. In this study, an investigation of fluid flow and heat transfer in microchannels is conducted. A review of the literature published regarding fluid flow and heat transfer in microchannels is provided in this study. A thorough background on the theory of internal convective heat transfer is provided as well. A critical analysis of some of the published heat transfer experiments on microchannels is also given. It was found that …

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Enriching The State Of Louisiana Secondary English Language Arts Comprehensive Curriculum, Adriane Renee Comeaux Jan 2008

Enriching The State Of Louisiana Secondary English Language Arts Comprehensive Curriculum, Adriane Renee Comeaux

LSU Master's Theses

The primary purpose of this research was to dissect the state of Louisiana’s comprehensive curriculum and make suggestions for enhancement to a document that is intended to set basic standards for education in all public schools throughout the state. While the Louisiana State Department of Education acknowledged a real need for such a document, the one it originally produced fell short of many educators’ expectations. In taking into consideration the diversity of the state’s students and their heritages, the researcher makes suggestions for enriching the English language arts (ELA) curriculum for secondary students by incorporating a wider variety of multicultural, …

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Fog-Smog Reactor And Photooxidation Of Naphthalene Within The Fog Condensate In A Uv Light Setup, Neha Shrikant Damle Jan 2008

Fog-Smog Reactor And Photooxidation Of Naphthalene Within The Fog Condensate In A Uv Light Setup, Neha Shrikant Damle

LSU Master's Theses

Polycyclic aromatic hydrocarbons (PAHs) form a major class of air pollutants. Naphthalene is a commonly found PAH in the atmosphere. Atmospheric fog water contains naphthalene absorbed from surrounding air. The partition coefficient of naphthalene is defined as the ratio of total naphthalene concentration in fog water to total naphthalene concentration in air. The purpose of this research was to determine the partition coefficients of naphthalene for varying reactor temperature. Fog was artificially formed in a predesigned reactor. NaCl aerosols were used as condensation nuclei for fog formation. Fog droplets were exposed to naphthalene vapors in the reactor. The reactor provided …

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The Impact Of Self-Reported Physical Activity Levels On The Prediction Of Body Fatness From Bmi In White And Black College Students, Michael Zanovec Jan 2008

The Impact Of Self-Reported Physical Activity Levels On The Prediction Of Body Fatness From Bmi In White And Black College Students, Michael Zanovec

LSU Master's Theses

The purpose of this study was to test the hypothesis that self-reported physical activity (PA) levels quantified from the International Physical Activity Questionnaire (IPAQ) could be used to improve the prediction of percent body fat (%BF) measured by dual-energy X-ray absorptiometry (DXA) from body mass index (BMI), gender, and race in White and Black college students. A total of 278 students, aged 18 – 24 yr, volunteered to participate. There were 133 males (85 White and 48 Black) and 145 females (77 White and 68 Black). Total activity levels were quantified in MET-hours per week (MET-hrs•wk-1) using the IPAQ short …

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An Evaluation Of The Perceived Obstacles For Policy Officials Regulating The Post Harvest Treatment Of Raw Oysters To Control The Human Health Vibrio Vulnificus Problem, Amy Leah Oestringer Jan 2008

An Evaluation Of The Perceived Obstacles For Policy Officials Regulating The Post Harvest Treatment Of Raw Oysters To Control The Human Health Vibrio Vulnificus Problem, Amy Leah Oestringer

LSU Master's Theses

Vibrio vulnificus is the leading pathogen linked to seafood-associated deaths. This naturally occurring marine bacterium presents a human health risk when it is consumed in raw oysters. Hospitalization is necessary in 90 % Vibrio vulnificus illnesses and 40% end in death. (CDC) Several guidelines and regulations have been enacted to combat this human health issue, but have failed to reduce the steadily rising illness rate. Post-harvest processing requirements for raw oysters could be used to reduce illness rates. A survey was conducted to measure the perceived obstacles that regulators and industry representatives of the raw oyster industry face in policymaking …

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Traffic Analysis Of Udp-Based Flows In Ourmon, Jim Binkley, Divya Parekh Jan 2008

Traffic Analysis Of Udp-Based Flows In Ourmon, Jim Binkley, Divya Parekh

Computer Science Faculty Publications and Presentations

We present a custom UDP flow tuple with an IP address key and a set of simple related statistical attributes. Attributes are used to calculate a per host metric called the UDP work weight which roughly measures the amount of network noise caused by a host. The work weight is used to produce a near real-time sorted top N report for UDP host tuples. We also present a derived attribute based on an algorithm called the UDP guesstimator. The UDP guesstimator roughly classifies port report hosts into various traffic categories including security threats (DOS/scanning) or P2P hosts based on high …

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Time-Varying Estimation Of Crop Insurance Program In Altering North Dakota Farm Economic Structure, Jane Amy Chow-Coleman Jan 2008

Time-Varying Estimation Of Crop Insurance Program In Altering North Dakota Farm Economic Structure, Jane Amy Chow-Coleman

Agribusiness and Applied Economics

This study examines how federal farm policies, specifically crop Insurance, have affected the farm economic structure of North Dakota's agriculture sector. The system of derived input demand equations is estimated to quantify the changes in North Dakota farmers' input use when they purchase crop insurance. Further, the cumulative rolling regression technique is applied to capture the varying effects of the farm policies over time. Empirical results from the system of input demand functions indicate that there is no moral hazard since North Dakota farmers will increase fertilizer and pesticide use in the presence of crop insurance. Results also indicate that …

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Locke On Consciousness, Angela M. Coventry, Uriah Kriegel Jan 2008

Locke On Consciousness, Angela M. Coventry, Uriah Kriegel

Philosophy Faculty Publications and Presentations

Locke’s theory of consciousness is often appropriated as a forerunner of present-day Higher-Order Perception (HOP) theories, but not much is said about it beyond that. We offer an interpretation of Locke’s account of consciousness that portrays it as crucially different from current-day HOP theory, both in detail and in spirit. In this paper, it is argued that there are good historical and philosophical reasons to attribute to Locke the view not that conscious states are accompanied by higher-order perceptions, but rather that conscious states constitute perceptions of themselves.

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Emperor Has No Clothes: Eu's Cyprus Challenge, Birol A. Yeşilada, Ahmet Sozen Jan 2008

Emperor Has No Clothes: Eu's Cyprus Challenge, Birol A. Yeşilada, Ahmet Sozen

Political Science Faculty Publications and Presentations

In the words of the former UN Secretary General Kofi Annan, “membership of [politically divided] Cyprus in the European Union coupled with Turkey’s membership aspirations has seriously complicated future peace negotiations on the island.” (Hürriyet, June 16, 2006). This is a rather harsh assessment of EU’s Cyprus policy given the fact that membership in the Union would most likely create the optimal conditions for peace and stability between the Greek and Turkish Cypriots. Yet, EU membership of one side at the expense of the other community, seem to have created more obstacles for peace. This paper provides a critical analysis …

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Education And The Age Profile Of Literacy Into Adulthood, Elizabeth Cascio, Damon Clark, Nora Gordon Jan 2008

Education And The Age Profile Of Literacy Into Adulthood, Elizabeth Cascio, Damon Clark, Nora Gordon

Dartmouth Scholarship

American teenagers perform considerably worse on international assessments of achievement than do teenagers in other high-income countries. This observation has been a source of great concern since the first international tests were administered in the 1960s. But does this skill gap persist into adulthood? We examine this question using the first international assessment of adult literacy, conducted in the 1990s. We find that, consistent with other assessments of the school-age population, U.S. teenagers perform relatively poorly, ranking behind teenagers in the twelve other rich countries surveyed. However, by their late twenties, Americans compare much more favorably to their counterparts abroad: …

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The Warps Survey. Vii. The Warps‐Ii Cluster Catalog, Donald J. Horner, Eric S. Perlman, Harald Ebeling, Laurence Jones, Caleb A. Scharf, Gary Wegner, Matthew Malkan, Ben Maughan Jan 2008

The Warps Survey. Vii. The Warps‐Ii Cluster Catalog, Donald J. Horner, Eric S. Perlman, Harald Ebeling, Laurence Jones, Caleb A. Scharf, Gary Wegner, Matthew Malkan, Ben Maughan

Dartmouth Scholarship

We present the galaxy cluster catalog from the second, larger phase of the Wide Angle ROSAT Pointed Survey (WARPS), an X-ray selected survey for high-redshift galaxy clusters. WARPS is among the largest deep X-ray cluster surveys and is being used to study the properties and evolution of galaxy clusters. The WARPS-II sample contains 125 clusters serendipitously detected in a survey of 301 ROSAT PSPC pointed observations and covers a sky area of 56.7 deg2. Of these 125 clusters, 53 have not been previously reported in the literature. We have nearly complete spectroscopic follow-up of the clusters, which range …

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Spectral Tomography With Diffuse Near-Infrared Light: Inclusion Of Broadband Frequency Domain Spectral Data, Jia Wang, Scott C. Davis, Subhadra Srinivasan, Shudong Jiang Jan 2008

Spectral Tomography With Diffuse Near-Infrared Light: Inclusion Of Broadband Frequency Domain Spectral Data, Jia Wang, Scott C. Davis, Subhadra Srinivasan, Shudong Jiang

Dartmouth Scholarship

No abstract provided.

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Emergence Of Networks In Distance-Constrained Trade, Kumar Venkat, Wayne W. Wakeland Jan 2008

Emergence Of Networks In Distance-Constrained Trade, Kumar Venkat, Wayne W. Wakeland

Complex Systems Faculty Publications and Presentations

Long-distance trade has been rapidly increasing in recent years. As traders from around the world exchange goods, they form networks with traders as nodes and transactions as links. We use an agent-based model of a simple artificial economy to examine the emergence of trade networks when the distance between traders matters. Distance can become an issue if fuel for transportation becomes expensive or if greenhouse gas emissions from transportation become a major concern. We model the distance constraint as a transaction cost proportional to the amount of goods traded and the distance that those goods must be transported. We find …

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