Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Mathematics (744)
- Chemistry (580)
- Analysis (564)
- Other Mathematics (556)
- Environmental Sciences (499)
-
- Earth Sciences (372)
- Oceanography and Atmospheric Sciences and Meteorology (342)
- Computer Sciences (243)
- Applied Mathematics (225)
- Physics (134)
- Oceanography (105)
- Geology (103)
- Astrophysics and Astronomy (79)
- Life Sciences (72)
- Engineering (71)
- Analytical Chemistry (34)
- Natural Resources and Conservation (33)
- Hydrology (32)
- Sedimentology (31)
- Geophysics and Seismology (29)
- Quantum Physics (28)
- Statistics and Probability (28)
- Other Physics (27)
- Physical Chemistry (26)
- Geochemistry (25)
- Geomorphology (25)
- Organic Chemistry (25)
- Ecology and Evolutionary Biology (24)
- Medicine and Health Sciences (24)
- Keyword
-
- Louisiana (58)
- Gulf of Mexico (36)
- Geology (22)
- Mississippi River (22)
- Wetlands (21)
-
- Analytical chemistry (20)
- Geochemistry (20)
- Organic chemistry (20)
- Synthesis (20)
- Machine learning (19)
- Microfluidics (17)
- Nanoparticles (17)
- Nitrogen (17)
- Antarctica (16)
- Hypoxia (16)
- Salinity (16)
- Estuary (15)
- Gravitational waves (14)
- Habitat (14)
- Hydrology (14)
- Modeling (14)
- Palynology (14)
- Stable isotopes (14)
- Climate change (13)
- Eutrophication (13)
- Mass spectrometry (13)
- Molecular dynamics (13)
- Phosphorus (13)
- Restoration (13)
- Barataria Bay (12)
- Publication Year
- Publication
- Publication Type
Articles 1381 - 1410 of 3417
Full-Text Articles in Physical Sciences and Mathematics
Association Of Drd4 Gene Polymorphisms With Range In Species Of The Genus Copsychus, Jocelyn B. Miller
Association Of Drd4 Gene Polymorphisms With Range In Species Of The Genus Copsychus, Jocelyn B. Miller
Honors Theses
No abstract provided.
On The Amount Of Sediment Deposited In Floodplains From The Mississippi River: A Case Study In Cat Island National Wildlife Refuge, Louisiana, Matthew Smith
Honors Theses
No abstract provided.
An Introduction To The Markov Chain Monte Carlo And Wang-Landau Algorithms, Jacob R. Desmond
An Introduction To The Markov Chain Monte Carlo And Wang-Landau Algorithms, Jacob R. Desmond
Honors Theses
No abstract provided.
Analyzing Market Incentives For Wetland Restoration In Louisiana: Wetland Mitigation Banking, Blue Carbon Sequestration, And Wetland Entrepreneurship, Eric Newberry
Honors Theses
No abstract provided.
Optimal Combined Divided And Proportional Reinsurance Policy, Eriyoti Chikodza, Julius N Esunge
Optimal Combined Divided And Proportional Reinsurance Policy, Eriyoti Chikodza, Julius N Esunge
Communications on Stochastic Analysis
No abstract provided.
Portfolio Optimization Under Partial Information With Expert Opinions: A Dynamic Programming Approach, Rüdiger Frey, Abdelali Gabih, Ralf Wunderlich
Portfolio Optimization Under Partial Information With Expert Opinions: A Dynamic Programming Approach, Rüdiger Frey, Abdelali Gabih, Ralf Wunderlich
Communications on Stochastic Analysis
No abstract provided.
Stochastic Control Of Itô-Lévy Processes With Applications To Finance, Bernt Øksendal, Agnès Sulem
Stochastic Control Of Itô-Lévy Processes With Applications To Finance, Bernt Øksendal, Agnès Sulem
Communications on Stochastic Analysis
No abstract provided.
Expert Opinions And Logarithmic Utility Maximization In A Market With Gaussian Drift, Abdelali Gabih, Hakam Kondakji, Jörn Sass, Ralf Wunderlich
Expert Opinions And Logarithmic Utility Maximization In A Market With Gaussian Drift, Abdelali Gabih, Hakam Kondakji, Jörn Sass, Ralf Wunderlich
Communications on Stochastic Analysis
No abstract provided.
Optimal Premium Policy Of An Insurance Firm With Delay And Stochastic Interest Rate, Charles Wilson Mahera, Olivier Menoukeu-Pamen, Moses Mwale
Optimal Premium Policy Of An Insurance Firm With Delay And Stochastic Interest Rate, Charles Wilson Mahera, Olivier Menoukeu-Pamen, Moses Mwale
Communications on Stochastic Analysis
No abstract provided.
The Itô Calculus And White Noise Theory: A Brief Survey Toward General Stochastic Integration, Hui-Hsiung Kuo
The Itô Calculus And White Noise Theory: A Brief Survey Toward General Stochastic Integration, Hui-Hsiung Kuo
Communications on Stochastic Analysis
No abstract provided.
Modelling Financial Information By Conditioning, Dennis Ikpe, Sure Mataramvura, Ronnie Becker
Modelling Financial Information By Conditioning, Dennis Ikpe, Sure Mataramvura, Ronnie Becker
Communications on Stochastic Analysis
No abstract provided.
Preliminary Investigation Of The Geometry And Kinematics Of The Bangong-Nujiang Suture At The Basu Metamorphic Massif, Se Tibet, Chase Michael Billeaudeau
Preliminary Investigation Of The Geometry And Kinematics Of The Bangong-Nujiang Suture At The Basu Metamorphic Massif, Se Tibet, Chase Michael Billeaudeau
LSU Master's Theses
There are many uncertainties associated with the development and deformation of the Tibetan Plateau. The Basu Massif, located along the eastern Bangong-Nujiang Suture Zone, is an ideal locality to help provide constraints to resolve the geologic evolution of the Tibetan Plateau. The Basu Massif is characterized by high pressure-ultra high pressure (HP-UHP) metamorphic rocks, syn- and post-collisional granites, and a central Upper Paleozoic unit bounded by discontinuous belts of serpentinite. Field data suggests that the carbonates of the central Upper Paleozoic unit, serpentinites, granites and metasedimentary rocks are part of an isoclinally folded shear zone that may have been thrust …
Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage
Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage
LSU Doctoral Dissertations
Transition metal oxide nanoparticles contained in fly ash are known to catalyze the formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) during the waste incineration process. The potential catalytic activity of silica-supported NiO, CuO, and NiO-CuO nanoparticles for the formation of PCDD/Fs will be discussed in this dissertation. The successful synthesis of silica-supported NiO, CuO, and NiO-CuO nanoparticles as surrogates of combustion-generated nanoparticles was important to this study. The synthesis was followed by the characterization of the nanoparticle surrogates by X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). Finally, the catalytic …
Characterization Of A Water Soluble, Non-Ionic, Helical Poly(Α-Amino Acid), Wayne Huberty
Characterization Of A Water Soluble, Non-Ionic, Helical Poly(Α-Amino Acid), Wayne Huberty
LSU Doctoral Dissertations
A water soluble, non-ionic, rodlike polymer, PEGL, was synthesized and characterized in efforts to synthesize a novel model polymer to study stiff polymers in solution. The rodlike system is likely stiff due to a high relative percent helicity in water up to 50 °C, measured by circular dichroism, the observation of liquid crystalline domains in water, and from the slope measured from conformation plots supplied by GPC/MALS; however, it also apparent the system is aggregating in both a 2 mM azide solution and a buffer (200 mM NaNO3 + 20 mM NaH2PO4 + 2 mM NaN3), in corroboration of negative …
Evolving Time Surfaces And Tracking Mixing Indicators For Flow Visualization, Farid Harhad
Evolving Time Surfaces And Tracking Mixing Indicators For Flow Visualization, Farid Harhad
LSU Doctoral Dissertations
The complexity of large scale computational fluid dynamic simulations (CFD) demands powerful tools to investigate the numerical results. To analyze and understand these voluminous results, we need to visualize the 3D flow field. We chose to use a visualization technique called Time Surfaces. A time surface is a set of surfaces swept by an initial seed surface for a given number of timesteps. We use a front tracking approach where the points of an in initial surface are advanced in a Lagrangian fashion. To maintain a smooth time surface, our method requires surface refinement operations that either split triangle edges, …
Holocene Paleoenvironmental Reconstruction From Mexico's Pacific Coast-A Paleotempestological Investigation, Thomas Bianchette
Holocene Paleoenvironmental Reconstruction From Mexico's Pacific Coast-A Paleotempestological Investigation, Thomas Bianchette
LSU Doctoral Dissertations
This dissertation examines the paleoenvironments of four lagoons from Mexico’s Pacific coast, with the aim of retrieving sediment deposition from storm surge events to determine long-term tropical cyclone (TC) records. Lagoons Agua Dulce, Boquita, Mitla, and Nuxco are located along a 700 km stretch in states Jalisco and Guerrero. Roughly 70 meters of sediment were collected and subjected to multiple proxies, including loss-on ignition, a microfossil survey, and geochemical analysis. Nuxco’s dynamism is caused by intense and prolonged rainfall (largely from TCs), responsible for increasing water level, opening the tidal inlet, and draining the site (termed “blowouts”). High amounts of …
Constructive Aspects Of Kochen's Theorem On P-Adic Closures, Evan Michael Eakins
Constructive Aspects Of Kochen's Theorem On P-Adic Closures, Evan Michael Eakins
LSU Doctoral Dissertations
In this work we begin with a brief survey of set theory and arithmetic to provide background for a logical procedure to `cleanse' the Axiom of Choice from a proof of a theorem of Kochen's. We accomplish this in the following chapters. We then discuss certain theorems involving definable Skolem functions. These theorems are used in Chapter 5 to give a construction of a p-adic closure of a p-valued field. Certain further considerations and open questions are addressed in the _x000C_final chapter.
Synthesis, Characterization, And Theoretical Studies Of Fluorescent Gumbos And Nanogumbos, Chengfei Lu
Synthesis, Characterization, And Theoretical Studies Of Fluorescent Gumbos And Nanogumbos, Chengfei Lu
LSU Doctoral Dissertations
In this dissertation, novel fluorescent materials, which are referred to as a group of uniform materials based on organic salts (GUMBOS) are synthesized, characterized, and studied for different applications. GUMBOS are solid state organic salts having melting points from 25°C to 250°C. Similar to ionic liquids, GUMBOS are highly tunable and can be designed for specific applications by incorporating multiple-functions into a single ion pair by selection of cation-anion combinations. Chapter 2 is a discussion of the synthesis and characterization of a PEGylated IR786 GUMBOS. These GUMBOS are prepared by a two-step synthesis procedure followed by a facile anion exchange …
Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton
Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton
LSU Doctoral Dissertations
A sample stage for characterizing photoactive materials was developed for studies with scanning probe microscopy (SPM). A sample stage was designed that directs light from a solar simulator via a fiber optic cable to illuminate the sample. Current-sensing and photocurrent measurements can be acquired with a conductive tip. The designed photocurrent stage can be used for SPM systems with a tip-mounted scanner. Current-sensing measurements can be taken with or without illumination to measure the current produced from organic photovoltaic (OPV) or photoconductive samples. Topography, lateral force and current-sensing images are acquired simultaneously, providing information of how nanoscale morphology affects the …
Bio-Imprinted Hydro-Gels (Bigs) For Protein And Virus Detection, Wei Bai
Bio-Imprinted Hydro-Gels (Bigs) For Protein And Virus Detection, Wei Bai
LSU Doctoral Dissertations
Detection of bio-markers at low concentration is becoming a more and more important topic in scientific research due to its importance in applications crucially related to people’s life like medical diagnosis, environment protection and national security. In the past decades, as the improvement of the modern analytical technologies progressed, plenty of methodologies have been developed to realize the fast and accurate detection of bio-markers in liquid media. However, some drawbacks still remain like the expensive cost, high requirement of operational environment, and need for skilled operators. Here, a new kind of aptamer-based bio-imprinted hydrogel sensor (BIG) with specific macroscopic volume …
Obstructions To Embedding Genus-1 Tangles In Links, Susan Marie Abernathy
Obstructions To Embedding Genus-1 Tangles In Links, Susan Marie Abernathy
LSU Doctoral Dissertations
Given a compact, oriented 3-manifold M in S3 with boundary, an (M,2n)-tangle T is a 1-manifold with 2n boundary components properly embedded in M. We say that T embeds in a link L in S3 if T can be completed to L by adding a 1-manifold with 2n boundary components exterior to M. The link L is called a closure of T. We focus on the case of (S_1 x D_2, 2)-tangles, also called genus-1 tangles, and consider the following question: given a genus-1 tangle G and a link L, how can we tell if L is a closure of …
Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi
Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi
LSU Doctoral Dissertations
The numerical model FVCOM (Finite Volume Community Ocean Model) was applied to study the effects of Hurricane Katrina on the vertical mixing over the Louisiana shelf and the process of post-storm re-stratification. Wind field from Hurricane Katrina was generated using a single vortex analytical model and was evaluated using available wind measurements over the shelf. Simulations of shelf circulation under Hurricane Katrina were done through several numerical tests to find the best approach for treating vertical eddy viscosity. Model results for the shelf during Katrina demonstrated opposite currents between surface and bottom for most of the shelf area. Results also …
Expression Of O-Linked N-Acetylglucosamine Modified Proteins And Production And Characterization Of Chlamydia Trachomatis Ct663, Octavia Y. Goodwin
Expression Of O-Linked N-Acetylglucosamine Modified Proteins And Production And Characterization Of Chlamydia Trachomatis Ct663, Octavia Y. Goodwin
LSU Doctoral Dissertations
O-linked â-N-acetylglucosamine is a regulatory post translational modification. This modification occurs on nearly all functional classes of proteins, in the nucleus and cytoplasm. O-GlcNAc is added to serine or threonine by O-GlcNAc transferase and removed by O-GlcNAcase. Previous attempts to study O-GlcNAc-modified proteins have resulted in low yields, making 3-dimensional structure determination impossible. In this dissertation O-GlcNAc transferase will be co-expressed with domains of human cAMP responsive element-binding protein (CREB1) and Abelson tyrosine-kinase 2 (ABL2) in E. coli, to produce O-GlcNAc-modified protein. The O-GlcNAc-modified protein was expressed in a variety of E. coli cell lines at a variety of conditions, …
Performance Of Active Vibration Isolation In The Advanced Ligo Detectors, Ryan Thomas Derosa
Performance Of Active Vibration Isolation In The Advanced Ligo Detectors, Ryan Thomas Derosa
LSU Doctoral Dissertations
The second generation of LIGO detectors has finished construction and the commissioning effort is pushing the instruments towards their designed sensitivity. Around the world similar undertakings are underway, and soon a global network capable of astrophysical observation will be operational. The first sentences are being written in an important chapter of terrestrial gravitational wave detection, an entire century after the theoretical foundations of general relativity were laid, and after decades of calculation, design, proposals, plans, and laboratory work. In order to make sensitive measurements, the detector must be well isolated from the vibrations of the ground, and much of this …
Parallel Processes In Hpx: Designing An Infrastructure For Adaptive Resource Management, Vinay Chandra Amatya
Parallel Processes In Hpx: Designing An Infrastructure For Adaptive Resource Management, Vinay Chandra Amatya
LSU Doctoral Dissertations
Advancement in cutting edge technologies have enabled better energy efficiency as well as scaling computational power for the latest High Performance Computing(HPC) systems. However, complexity, due to hybrid architectures as well as emerging classes of applications, have shown poor computational scalability using conventional execution models. Thus alternative means of computation, that addresses the bottlenecks in computation, is warranted. More precisely, dynamic adaptive resource management feature, both from systems as well as application's perspective, is essential for better computational scalability and efficiency. This research presents and expands the notion of Parallel Processes as a placeholder for procedure definitions, targeted at one …
Neutron Scattering Studies Of Unusual Spin Structure And Local Correlation In Complex Oxides, Dalgis Mesa
Neutron Scattering Studies Of Unusual Spin Structure And Local Correlation In Complex Oxides, Dalgis Mesa
LSU Doctoral Dissertations
Complex correlated electron materials (CEMs), such as transition-metal oxides with exotic properties and novel functionalities, present immense opportunities and formidable challenges in condensed matter physics, materials science, and engineering. These systems are characterized by a multitude of competing ground states that result from the close coupling between charge, lattice, orbital, and spin degrees of freedom, which can be tuned by chemical substitution, strain induction, or by the application of external stimulus (e.g. pressure, temperature, electric, or magnetic fields). Interest in CEMs is fueled by the richness of their novel properties (e.g. Colossal Magnetoresistance (CMR), Quantum Criticality, and High Temperature Superconductivity), …
Performance Characterization Of The Dual-Recycled Michelson Subsystem In Advanced Ligo, Anamaria Effler
Performance Characterization Of The Dual-Recycled Michelson Subsystem In Advanced Ligo, Anamaria Effler
LSU Doctoral Dissertations
General relativity predicts the existence of gravitational waves as ripples in spacetime propagating at the speed of light. They couple to matter weakly, which implies only cataclysmic cosmic events generating such waves can be detected. Binary neutron star coalescences are, for example, one of the most promising detectable source. Their weak coupling also implies that very sensitive instruments are needed to detect them, and the most sensitive so far have been laser interferometers with km-scale arms. The Laser Interferometric Gravitational wave Observatory (LIGO) is exactly such an instrument, and the most sensitive in the world to the date of this …
Invariants Of Legendrian Products, Peter Lambert-Cole
Invariants Of Legendrian Products, Peter Lambert-Cole
LSU Doctoral Dissertations
This thesis investigates a construction in contact topology of Legendrian submanifolds called the Legendrian product. We investigate and compute invariants for these Legendrian submanifolds, including the Thurston-Bennequin invariant and Maslov class; Legendrian contact homology for the product of two Legendrian knots; and generating family homology.
A Persistent Storage Model For Extreme Computing, Shuangyang Yang
A Persistent Storage Model For Extreme Computing, Shuangyang Yang
LSU Doctoral Dissertations
The continuing technological progress resulted in a dramatic growth in aggregate computational performance of the largest supercomputing systems. Unfortunately, these advances did not translate to the required extent into accompanying I/O systems and little more in terms of architecture or effective access latency. New classes of algorithms developed for massively parallel applications, that gracefully handle the challenges of asynchrony, heavily multi-threaded distributed codes, and message-driven computation, must be matched by similar advances in I/O methods and algorithms to produce a well performing and balanced supercomputing system. This dissertation proposes PXFS, a storage model for persistent objects inspired by the ParalleX …
Scanning Probe Investigations Of Magnetic Nanoparticles, Protein Binding And The Synthesis Of Rare Earth Oxide Nanoparticles Using Nanoscale Lithography, Lauren Elizabeth Englade-Franklin
Scanning Probe Investigations Of Magnetic Nanoparticles, Protein Binding And The Synthesis Of Rare Earth Oxide Nanoparticles Using Nanoscale Lithography, Lauren Elizabeth Englade-Franklin
LSU Doctoral Dissertations
Approaches to prepare spatially selective surfaces were developed in this dissertation for constructing assemblies of biomolecules and inorganic materials. Nanoscale surface patterns of organic thin films were prepared using particle lithography combined with organosilane chemistry. Biological and inorganic nanomaterials can be patterned with tailorable periodicities, which can be controlled by selecting the diameter of mesospheres used as surface masks. The surface platforms of well-defined nanopatterns are ideal for high resolution investigations using scanning probe microscopy (SPM). Local measurements of surface properties combined with visualization of the steps of chemical reactions at the molecular level were accomplished. Fundamental studies of the …