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Water And Solute Transport In The Shallow Subsurface Of A Riverine Wetland Natural Levee, April Elea Newman 2010 Louisiana State University and Agricultural and Mechanical College

Water And Solute Transport In The Shallow Subsurface Of A Riverine Wetland Natural Levee, April Elea Newman

LSU Master's Theses

In riverine wetlands, the rate and magnitude of water exchanged between river channels and adjacent wetlands have a major influence on hydrologic function and associated aquatic habitat and water quality. River channels are generally separated from backswamps by natural levees; however, preferential flow may allow potentially substantial water and solute exchange between them. Determining the influence of preferential flow on water and solute transport in natural levees requires an innovative approach that allows measurement of transport rates at a scale large enough to capture field-scale variability. To test the hypothesis that preferential flow is important to subsurface water movement through ...


Microfluidic Devices Interfaced To Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry For Proteomics, Jeonghoon Lee 2010 Louisiana State University and Agricultural and Mechanical College

Microfluidic Devices Interfaced To Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry For Proteomics, Jeonghoon Lee

LSU Doctoral Dissertations

Microfluidic interfaces were developed for off-line matrix-assisted laser desorption/ionization mass spectrometry (MALDI). Microfluidic interfaces allow samples to be manipulated on-chip and deposited onto a MALDI target plate for analysis. For this research, microfluidic culturing devices and automated digestion and deposition microfluidic chip platforms were developed for the identification of proteins. The microfluidic chip components were fabricated on a poly(methyl methacrylate), PMMA, wafer using the hot embossing method and a molding tool with structures prepared via micromilling. One of the most important components of the chip system was a trypsin microreactor. An open channel microreactor was constructed in a ...


Modeling Thermal Phenomena And Searching For New Thermally Induced Monitor Signals In Large Sale Gravitational Wave Detectors, Rupal Shashikant Amin 2010 Louisiana State University and Agricultural and Mechanical College

Modeling Thermal Phenomena And Searching For New Thermally Induced Monitor Signals In Large Sale Gravitational Wave Detectors, Rupal Shashikant Amin

LSU Doctoral Dissertations

The Laser Interferometer Gravitational-wave Observatory (LIGO) array’s 4 km detectors have transitioned from an initial configuration (iLIGO) to an enhanced configuration (eLIGO) [1]. Both configurations relied on high circulating laser powers to achieve sensitivity goals between 150 Hz and 8 kHz. These power levels were sufficient to induce thermally driven focal affects in the primary optics. Since the detectors were designed to achieve maximum sensitivity when laser light was optimally coupled (mode matched) into the antenna, small deviations in focal parameters influenced performance. A laser based thermal compensation system (TCS) was installed for use in both configurations to counteract ...


Optimal Control And Nonlinear Programming, Qingxia Li 2010 Louisiana State University and Agricultural and Mechanical College

Optimal Control And Nonlinear Programming, Qingxia Li

LSU Doctoral Dissertations

In this thesis, we have two distinct but related subjects: optimal control and nonlinear programming. In the first part of this thesis, we prove that the value function, propagated from initial or terminal costs, and constraints, in the form of a differential equation, satisfy a subgradient form of the Hamilton-Jacobi equation in which the Hamiltonian is measurable with respect to time. In the second part of this thesis, we first construct a concrete example to demonstrate conjugate duality theory in vector optimization as developed by Tanino. We also define the normal cones corresponding to Tanino's concept of the subgradient ...


Orthogonal Grassmannians And Hermitian K-Theory In A¹-Homotopy Theory Of Schemes, Girja Shanker Tripathi 2010 Louisiana State University and Agricultural and Mechanical College

Orthogonal Grassmannians And Hermitian K-Theory In A¹-Homotopy Theory Of Schemes, Girja Shanker Tripathi

LSU Doctoral Dissertations

In this work we prove that the hermitian K-theory is geometrically representable in the A^1 -homotopy category of smooth schemes over a field. We also study in detail a realization functor from the A^1 -homotopy category of smooth schemes over the field R of real numbers to the category of topological spaces. This functor is determined by taking the real points of a smooth R-scheme. There is another realization functor induced by taking the complex points with a similar description although we have not discussed this other functor in this dissertation. Using these realization functors we have concluded ...


Implementation And Analysis Of A Top-K Retrieval System For Strings, Sabrina Chandrasekaran 2010 Louisiana State University and Agricultural and Mechanical College

Implementation And Analysis Of A Top-K Retrieval System For Strings, Sabrina Chandrasekaran

LSU Master's Theses

Given text which is a union of d documents of strings, D = d1, d2,...., dd, the emphasis of this thesis is to provide a practical framework to retrieve the K most relevant documents for a given pattern P, which comes as a query. This cannot be done directly, as going through every occurrence of the query pattern may prove to be expensive if the number of documents that the pattern occurs in is much more than the number of documents (K) that we require. Some advanced query functionality will be required, as compared to listing the documents that the pattern ...


Multi-Scale Habitat Associations Of Shorebirds During Spring Migration In Southwestern Louisiana Rice Fields, Rachel K. Villani 2010 Louisiana State University and Agricultural and Mechanical College

Multi-Scale Habitat Associations Of Shorebirds During Spring Migration In Southwestern Louisiana Rice Fields, Rachel K. Villani

LSU Master's Theses

Rice is the most common wetland crop in the world, and important for waterbirds and shorebirds worldwide, including the United States. In Louisiana, shorebirds use rice fields during spring migration, and are an important for foraging and refueling during migration. However, competing land uses and restoration projects may reduce the availability of rice fields, and impact the landscape that shorebirds use during migration. To determine how shorebirds use the landscape, I evaluated local and landscape factors affecting shorebird use of rice fields during spring migration in southwestern Louisiana. Using five habitat suitability zones (HSZs) based on rice density and canopy ...


Voluntary Exercise In Phosphorylase Kinase Deficient Mice, Ashley M. Mefford 2010 Western Kentucky University

Voluntary Exercise In Phosphorylase Kinase Deficient Mice, Ashley M. Mefford

Honors College Capstone Experience/Thesis Projects

Phosphorylase kinase (PhK), a key regulator of glycogenolysis, is critical for maintaining blood glucose levels thus providing energy to sustain muscle contraction. A deficiency of PhK in skeletal muscle is the cause of one type of glycogen storage disease (GSD) in humans. This study investigates the physiological and genetic adaptations that occur in a mouse model of GSD, I/LnJ mice, in response to voluntary exercise. Juvenile (6-8 weeks old) and adult (12-14 weeks old) I/LnJ and wild-type C57/Bl6 mice exercised voluntarily for 1, 2 or 5 weeks. Exercise data was calculated as mean daily running time, daily ...


Slowing And Switching Of Light In Semiconductor Quantum Wells, Murat Yildirim 2010 University of Iowa

Slowing And Switching Of Light In Semiconductor Quantum Wells, Murat Yildirim

Theses and Dissertations

After light became a part of the telecommunication system, the manipulation of light, especially the control of the speed of light, became a focus of research. By using the different approaches of the interaction between light and matter, there have been many successful attempts to slow down the speed of light, even to several meters per second. In the first part of my thesis, I studied pulse propagation in absorptive media (GaAs/AlGaAs multiple quantum well structures-MQWs) to gain insight into the linear interaction between matter and light. Systematic and fundamental measurements of pulse propagation in GaAs/AlGaAs multiple quantum ...


Synthetic Study Of Para-Substituted 5,6-Fused Ring Pyridazines, Justin Mobley 2010 Western Kentucky University

Synthetic Study Of Para-Substituted 5,6-Fused Ring Pyridazines, Justin Mobley

Honors College Capstone Experience/Thesis Projects

Much of the focus in organic chemistry today is in area of green chemistry. With such large amounts of attention being paid to how do we create a more sustainable world, the focus has been to come up with new ways to not only create energy but to conserve energy and use recyclable products. One possible solution is through the use of organic and organometallic semiconductors. Due to their structural nature, organic semiconductors show similar conducting potential to that of metals such as copper with the potential to be more durable and more efficient. This project focuses strictly on the ...


Modeling The Effects Of Climate Change Forecasts On Streamflow In The Nooksack River Basin, Susan E. Dickerson 2010 Western Washington University

Modeling The Effects Of Climate Change Forecasts On Streamflow In The Nooksack River Basin, Susan E. Dickerson

WWU Graduate School Collection

The Nooksack River has its headwaters in the North Cascade Mountains and drains an approximately 2300 km2 watershed in northwestern Washington State. The timing and magnitude of streamflow in a high relief, snow-dominated drainage basin such as the Nooksack River basin is strongly influenced by temperature and precipitation. Forecasts of future climate made by general circulation models (GCMs) predict increases in temperature and variable changes to precipitation in western Washington, which will affect streamflow, snowpack, and glaciers in the Nooksack River basin. Anticipating the response of the river to climate change is crucial for water resources planning because municipalities, tribes ...


Viability Of Coho Salmon Oncorhynchus Kisutch In Relation To Streamflow Regulation In Terrell Creek, Washington, Ryan S. Vasak 2010 Western Washington University

Viability Of Coho Salmon Oncorhynchus Kisutch In Relation To Streamflow Regulation In Terrell Creek, Washington, Ryan S. Vasak

WWU Graduate School Collection

As salmon and trout populations decline in the Pacific Northwest, emphasis should be placed on restoration of any stream capable of producing salmon and trout. Terrell Creek is a small, dam regulated, independent drainage that historically produced at least four species of salmon and trout. Streamflow, regulated at the Lake Terrell dam, has typically been close to zero during the summer low flow period and probably affected salmon and trout population levels in the Creek. This study was designed to characterize the current fish assemblage in Terrell Creek, estimate coho salmon (Oncorhynchus kisutch) smolt production levels, identify factors that limit ...


Structural Characterization Of Cytoskeleton Regulating Protein Villin And Its C-Terminal Modular Domains, Danielle A. Pfaff 2010 Western Washington University

Structural Characterization Of Cytoskeleton Regulating Protein Villin And Its C-Terminal Modular Domains, Danielle A. Pfaff

WWU Graduate School Collection

Villin is a modular protein that regulates F-actin bundles in the microvilli of absorptive epithelial cells in the intestine. At low (10-100 nM) calcium levels, Villin is an F-actin bundling agent supporting the specialized brush border membrane of the absorptive epithelium. At intermediate micromolar calcium levels, Villin nucleates and caps the barbed ends of F-actin and in high (> 100 μM) calcium Villin is an F-actin severing agent (Bretsher & Weber, 1980; Glenney et al., 1980, 1981; Mooseker et al. 1980). The amino acid sequence of Villin has seven modular domains. The first six Villin domains (D1-D6) form a "core" of ~50% sequence identity ...


Ambient Pressure Organic Semiconductor Thin Film Growth By Ambient Axisymmetric Spray, Kevin A. (Kevin Anthony) Bufkin 2010 Western Washington University

Ambient Pressure Organic Semiconductor Thin Film Growth By Ambient Axisymmetric Spray, Kevin A. (Kevin Anthony) Bufkin

WWU Graduate School Collection

Interest in using organic semiconductors in applications such as large area displays, photovoltaic devices, and radio frequency identification tags stems in part from their prospects for enabling significantly reduced manufacturing costs compared to traditional inorganic semiconductors. However many of the best performing prototype devices produced so far have involved expensive or time-consuming fabrication methods, such as the use of single crystals or thin films deposited under high vacuum conditions. This thesis examines a new approach for growing low molecular weight organic crystalline films at ambient conditions based on an organic vapor-liquid-solid growth (OVLS) mechanism using thermotropic nematic liquid crystal (LC ...


Naturally Occurring Aqueous Arsenic And Seawater Intrusion On Lummi Island, Wa, Erica Martell 2010 Western Washington University

Naturally Occurring Aqueous Arsenic And Seawater Intrusion On Lummi Island, Wa, Erica Martell

WWU Graduate School Collection

Two different types of groundwater contamination may be present in the aquifers on northern Lummi Island, Washington: naturally occurring arsenic and seawater intrusion. Freshwater on northern Lummi Island is stored in bedrock and unconsolidated glacial sediments. The naturally occurring arsenic, sourced from an undetermined stratigraphic layer, varies spatially throughout the island. Additionally, seawater may be intruding into the groundwater supply, which is the primary source of drinking water for the residents of the island. The process of mobilization of the naturally occurring arsenic and the extent of the seawater intrusion has not been fully explored. The purpose of my study ...


Habitat Modeling Using Path Analysis: Delineating Mountain Goat Habitat In The Washington Cascades, Tana Beus 2010 Western Washington University

Habitat Modeling Using Path Analysis: Delineating Mountain Goat Habitat In The Washington Cascades, Tana Beus

WWU Graduate School Collection

A 70-90% decline in mountain goat (Oreamnos americanus) populations in Washington State over the past few decades has spurred the need for an improved understanding of seasonal goat-habitat relationships. Habitat use data have been collected from 46 radio-collared mountain goats across their native range in Washington State. Using Geographical Information Systems (GIS), I explored relationships between use and availability of habitat. To overcome issues of autocorrelation, I compared actual mountain goat paths with available paths of matched identical spatial topology and used multi-scale path analysis to explore various ecologically informed relationships between landscape structure and the movements of mountain goats ...


Paleomagnetism And Rock Magnetism Of Remagnetized Carbonate Rocks From The Helena Salient, Southwest Montana, Benjamin F. (Benjamin Franklin) Baugh 2010 Western Washington University

Paleomagnetism And Rock Magnetism Of Remagnetized Carbonate Rocks From The Helena Salient, Southwest Montana, Benjamin F. (Benjamin Franklin) Baugh

WWU Graduate School Collection

The Helena salient is an arcuate curve in the southwest Montana fold and thrust belt, characterized by thin-skinned folding and thrusting. Ages from volcanic sills imply that deformation in the region began 77 million years ago during the Late Cretaceous (Harlan et al., 2008). This study investigates the nature of curvature associated with this salient using paleomagnetic techniques. Carbonate rocks of the Mississippian Madison Group were sampled from 24 sites across three folds: the Devil's Fence anticline, the Three Forks anticline and the Turner anticline (near Townsend, MT). Results from 16 sites have well defined, but very weak, magnetizations ...


Activation And Inhibition Of Gtpase Translation Factors On The Prokaryotic Ribosome, Justin D. Walter 2010 Western Washington University

Activation And Inhibition Of Gtpase Translation Factors On The Prokaryotic Ribosome, Justin D. Walter

WWU Graduate School Collection

Throughout all domains of life, each protein in a cell is synthesized by a remarkable biomolecular machine called the ribosome, in a process referred to as translation. This process is regulated by proteins called translation factors, several of which belong to the GTPase superfamily of enzymes which require the binding and subsequent hydrolysis of guanosine 5'-triphosphate (GTP) to execute their function. In contrast to the regulatory role of translation factors, protein biosynthesis is inhibited by several naturally occurring antibiotics. While our understanding of translation has been revolutionized by the recent elucidation of atomic-resolution x-ray crystal structures of the ribosome ...


Magmatic Processes In The Jurassic Bonanza Arc: Insights From The Alberni Region Of Vancouver Island, Canada, Benjamin D. (Benjamin David) Paulson 2010 Western Washington University

Magmatic Processes In The Jurassic Bonanza Arc: Insights From The Alberni Region Of Vancouver Island, Canada, Benjamin D. (Benjamin David) Paulson

WWU Graduate School Collection

The Early to Middle Jurassic Bonanza island arc on Vancouver Island, Canada, exposes the middle and upper crust of an ancient arc crustal section. The arc is exposed for a length of ~500 km along the west coast of Vancouver Island. The three components of the Bonanza arc represent different crustal levels of magmatism. The deepest level of magmatism is represented by the Westcoast Crystalline Complex, the intermediate level is represented by the Island Intrusions Suite, and the surficial level is the represented by Bonanza Group volcanics. Samples of the volcanic section were collected in the Pemberton Hills region of ...


The Structural And Tectonic History Of The Mt. Formidable Region, North Cascades, Washington, Julia E. (Julia Eileen) Labadie 2010 Western Washington University

The Structural And Tectonic History Of The Mt. Formidable Region, North Cascades, Washington, Julia E. (Julia Eileen) Labadie

WWU Graduate School Collection

Deformation events associated with crustal thickening are preserved in the Mt. Formidable region of the North Cascades, a Cretaceous orogen and continental arc at the southern end of the Coast Plutonic Complex. The kinematics and timing of deformation in this area during burial, magmatism and metamorphism are the focus of this study. Rocks in the Mt. Formidable region span from at least the Late Triassic to the Early Cretaceous and include supracrustal units and associated metaplutonic rocks that have been interpreted as an island arc sequence. Rocks within the study region include the sub-arc Marblemount Meta-Quartz Diorite, the supra-arc metaclastic ...


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