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Articles 1  30 of 2959
FullText Articles in Physical Sciences and Mathematics
Visual Analytics And Modeling Of Materials Property Data, Diwas Bhattarai
Visual Analytics And Modeling Of Materials Property Data, Diwas Bhattarai
LSU Doctoral Dissertations
Due to significant advancements in experimental and computational techniques, materials data are abundant. To facilitate datadriven research, it calls for a system for managing and sharing data and supporting a set of tools for effective data analysis and modeling. Generally, a given material property M can be considered as a multivariate data problem. The dimensions of M are the values of the property itself, the conditions (pressure P, temperature T, and multicomponent composition X) that control the concerned property, and relevant metadata I (source, date).
Here we present a comprehensive database considering both experimental and computational sources …
Measurement Of NearThreshold Proton Branching Ratios In 31s Important For Novae, Sudarsan Balakrishnan
Measurement Of NearThreshold Proton Branching Ratios In 31s Important For Novae, Sudarsan Balakrishnan
LSU Doctoral Dissertations
Classical novae are stellar explosions that contribute to the nucleosynthesis of isotopes on the protonrich side of the valley of stability up to ^{40}Ca. In ONe novae, the incompletely understood reaction rate of ^{30}P(p,γ)^{31}S is known to strongly influence the production rate of several stable isotopes such as ^{30}Si, ^{31}P, and ^{32,33,34}S. A precise measurement of this reaction rate has several potential implications towards matching astrophysical observables to the physical composition of the nova site  the observed elemental abundance ratios of O/S and S/Al have been suggested as useful `thermometers' to gauge …
RungeKutta Methods For Rough Differential Equations, Martin Redmann, Sebastian Riedel
RungeKutta Methods For Rough Differential Equations, Martin Redmann, Sebastian Riedel
Journal of Stochastic Analysis
No abstract provided.
A JumpDiffusion Process For Asset Price With NonIndependent Jumps, Yihren Wu, Majnu John
A JumpDiffusion Process For Asset Price With NonIndependent Jumps, Yihren Wu, Majnu John
Journal of Stochastic Analysis
No abstract provided.
Quantization Of The Monotone Poisson Central Limit Theorem, Yungang Lu
Quantization Of The Monotone Poisson Central Limit Theorem, Yungang Lu
Journal of Stochastic Analysis
No abstract provided.
Applications Of A Superposed OrnsteinUhlenbeck Type Processes, Santatriniaina Avotra Randrianambinina, Julius Esunge
Applications Of A Superposed OrnsteinUhlenbeck Type Processes, Santatriniaina Avotra Randrianambinina, Julius Esunge
Journal of Stochastic Analysis
No abstract provided.
On The Diagonalizability And Factorizability Of Quadratic Boson Fields, Luigi Accardi, Andreas Boukas, Yungang Lu, Alexander Teretenkov
On The Diagonalizability And Factorizability Of Quadratic Boson Fields, Luigi Accardi, Andreas Boukas, Yungang Lu, Alexander Teretenkov
Journal of Stochastic Analysis
No abstract provided.
Estimation Of Economic Risk From Coastal Natural Hazards In Louisiana, Rubayet Bin Mostafiz
Estimation Of Economic Risk From Coastal Natural Hazards In Louisiana, Rubayet Bin Mostafiz
LSU Doctoral Dissertations
Louisiana, U.S.A., is among the most vulnerable areas globally to coastal natural hazards, with risk vulnerability likely increasing. The risks associated with nontropicalcyclone hazards in Louisiana’s coastal zone have been understudied. This research enhances present and future (i.e., 2050) Louisiana risk assessment using locallyweighted, modelbased hazard frequency/intensity and population projections.
Results suggest that property risks associated with extreme cold temperature and tornado are and will remain costlier than those for hail and lightning. Property risks of extreme cold temperature and hail are projected to decrease with the expected warming temperatures, with those of all four of these hazards peaking in …
Compilation Optimizations To Enhance Resilience Of Big Data Programs And Quantum Processors, Travis D. Lecompte
Compilation Optimizations To Enhance Resilience Of Big Data Programs And Quantum Processors, Travis D. Lecompte
LSU Doctoral Dissertations
Modern computers can experience a variety of transient errors due to the surrounding environment, known as soft faults. Although the frequency of these faults is low enough to not be noticeable on personal computers, they become a considerable concern during largescale distributed computations or systems in more vulnerable environments like satellites. These faults occur as a bit flip of some value in a register, operation, or memory during execution. They surface as either program crashes, hangs, or silent data corruption (SDC), each of which can waste time, money, and resources. Hardware methods, such as shielding or error correcting memory (ECM), …
Archean Metamorphosed Ultramafic Rocks And Chromitites From The Beartooth Mountains, Montana, Usa: Insights Into Mantle Geochemistry And Tectonics, Rachel M. Gnieski
Archean Metamorphosed Ultramafic Rocks And Chromitites From The Beartooth Mountains, Montana, Usa: Insights Into Mantle Geochemistry And Tectonics, Rachel M. Gnieski
LSU Master's Theses
Metamorphosed ultramafic rocks and associated chromitite pods in the eastern Beartooth Mountains, Montana (USA) provide a window into the tectonic evolution of the Archean northern Wyoming Province. Metaultramafic rocks occur with a variety of metasupracrustal rocks as xenoliths in an extensive 2.8 Ga suite of TTG (meta)plutonic rocks. The origin of the ultramafic rocks is obscured by an upper amphibolitetogreenschist facies overprint. Major element analyses (XRF, wt. %) of metaultramafic host rocks show SiO_{2} from 40.5350.37, MgO from 15.3345.25, TiO_{2} from 0.070.62, Al_{2}O_{3} from 1.2510.62, and Fe_{2}O_{3}(t) from 8.0614.54. Total alkali …
Fractal Like Snowflakes Generated By NonContractive Function Systems, William H. Kelly Iii
Fractal Like Snowflakes Generated By NonContractive Function Systems, William H. Kelly Iii
LSU Master's Theses
At the heart of this thesis is the examination of a noncontractive iterative function system T on the Hausdorff metric space of all compact subset of ℝ . Despite the absence of an 2 attracting fixed point, an examination reveals the appearance of fractallike shapes (snowflakes) when applying the Barnsley’ random walk method to study the iterative sequence 𝑇^{n}(0) (𝑛 ∈ ℕ) for 𝑇 = 𝑇^{1} ∪ 𝑇^{2} ∪ 𝑇^{3}, where 𝑇_{1}(𝑧) = 𝑟𝑧, 𝑇_{2}(𝑧) = 𝑟𝑧 + 𝑏, and 𝑇_{3}(𝑧) = 𝑟𝑧  𝑏, and 𝑟 = …
Polymer Mimetics For Soil Modeling And Detection Of Biomarkers, Md Ragib Hasan
Polymer Mimetics For Soil Modeling And Detection Of Biomarkers, Md Ragib Hasan
LSU Doctoral Dissertations
The population of the world is increasing day by day and is expected to reach 9.8 billion by the year 2050. The everincreasing demand for agricultural products is putting an unprecedented strain on the world's soils as the human population continues to expand. Soil degradation caused by overfarming and the agrochemicals (fertilizers, pesticides, etc.) used in agriculture is a growing problem, although its causes remain murky. In addition, little is understood about the molecularlevel interactions of substances that are subsequently introduced to soils, such as agricultural chemicals (ACs). Therefore, it is expected that these constraints may be circumvented by the …
Hydrogeologic Investigation Of A Covered Karst Terrain, Joseph Peter Honings
Hydrogeologic Investigation Of A Covered Karst Terrain, Joseph Peter Honings
LSU Doctoral Dissertations
Increasing demand for water for agricultural use within the Dougherty Plain of the Southeastern United States has depleted surface water bodies. In karstic landscapes, such as the Dougherty Plain in southwest Georgia where the linkages between surface and ground waters are close, there is a need to understand the physical characteristics of the subsurface that allow these close linkages. Having a better understanding of the subsurface characteristics will aid numerical modeling efforts that underpin policy decisions and economic analyses. Two common features on this karstic landscape are draws and geographically isolated wetlands. Using LiDAR, aerial imagery, and groundpenetrating radar, this …
The Degree Gini Index Of Several Classes Of Random Trees And Their Poissonized Counterparts—Evidence For Duality, Carly Domicolo, Panpan Zhang, Hosam Mahmoud
The Degree Gini Index Of Several Classes Of Random Trees And Their Poissonized Counterparts—Evidence For Duality, Carly Domicolo, Panpan Zhang, Hosam Mahmoud
Journal of Stochastic Analysis
No abstract provided.
A Cluster Structure On The Coordinate Ring Of Partial Flag Varieties, Fayadh Kadhem
A Cluster Structure On The Coordinate Ring Of Partial Flag Varieties, Fayadh Kadhem
LSU Doctoral Dissertations
The main goal of this dissertation is to show that the (multihomogeneous) coordinate ring of a partial flag variety C[G/P_K^−] contains a cluster algebra for every semisimple complex algebraic group G. We use derivation properties and a canonical lifting map to prove that the cluster algebra structure A of the coordinate ring C[N_K] of a Schubert cell constructed by Goodearl and Yakimov can be lifted, in an explicit way, to a cluster structure \hat{A} living in the coordinate ring of the corresponding partial flag variety. Then we use a minimality condition to prove that the cluster algebra \hat{A} is equal …
Controlling ElectroMagnetic Functionality Of Ruthenates By Heterostructure Design, Zeeshan Ali
Controlling ElectroMagnetic Functionality Of Ruthenates By Heterostructure Design, Zeeshan Ali
LSU Doctoral Dissertations
Perovskite oxides (ABO_{3}) show wide range of functionalities originating from interplay of structural, spin, charge, and orbital degrees of freedoms. The bulk perovskite structure could be controlled via conventional chemical substitution, though exploiting heterostructure engineering novel ground states could be observed which otherwise are absent in bulk. In this thesis, the interest is to explore the electromagnetic phenomena as complex oxides are confined in heterostructures.
I first investigate electromagnetic properties of ultrathin epitaxial ruthenate: SrRuO_{3} (SRO); spatially confined between SrTiO_{3} (STO) i.e., STO^{5}SRO^{n}STO^{5} with n = 1 and 2unit cells. It …
A Sharp Rate Of Convergence In The Functional Central Limit Theorem With Gaussian Input, S.V. Lototsky
A Sharp Rate Of Convergence In The Functional Central Limit Theorem With Gaussian Input, S.V. Lototsky
Journal of Stochastic Analysis
No abstract provided.
Quantization Of The Free Poisson Central Limit Theorem, Yungang Lu
Quantization Of The Free Poisson Central Limit Theorem, Yungang Lu
Journal of Stochastic Analysis
No abstract provided.
Quantization Of The Boolean Poisson Central Limit Theorem And A Generalized Boolean Bernoulli Sequence, Yungang Lu
Quantization Of The Boolean Poisson Central Limit Theorem And A Generalized Boolean Bernoulli Sequence, Yungang Lu
Journal of Stochastic Analysis
No abstract provided.
A FirstPassage Problem For Exponential Integrated Diffusion Processes, Mario Lefebvre
A FirstPassage Problem For Exponential Integrated Diffusion Processes, Mario Lefebvre
Journal of Stochastic Analysis
No abstract provided.
Resonant Plasmonic–Biomolecular Chiral Interactions In The FarUltraviolet: Enantiomeric Discrimination Of Sub10 Nm Amino Acid Films, Tiago Ramos Leite, Lin Zschiedrich, Orhan Kizilkaya, Kevin M. Mcpeak
Resonant Plasmonic–Biomolecular Chiral Interactions In The FarUltraviolet: Enantiomeric Discrimination Of Sub10 Nm Amino Acid Films, Tiago Ramos Leite, Lin Zschiedrich, Orhan Kizilkaya, Kevin M. Mcpeak
Faculty Publications
Resonant plasmonic–molecular chiral interactions are a promising route to enhanced biosensing. However, biomolecular optical activity primarily exists in the farultraviolet regime, posing significant challenges for spectral overlap with current nanooptical platforms. We demonstrate experimentally and computationally the enhanced chiral sensing of a resonant plasmonic–biomolecular system operating in the farUV. We develop a fullwave model of biomolecular films on Al gammadion arrays using experimentally derived chirality parameters. Our calculations show that detectable enhancements in the chiroptical signals from small amounts of biomolecules are possible only when tight spectral overlap exists between the plasmonic and biomolecular chiral responses. We support this conclusion …
Domain Of Exotic Laplacian Constructed By Wiener Integrals Of Exponential White Noise Distributions, Luigi Accardi, Un Cig Ji, Kimiaki Saitô
Domain Of Exotic Laplacian Constructed By Wiener Integrals Of Exponential White Noise Distributions, Luigi Accardi, Un Cig Ji, Kimiaki Saitô
Journal of Stochastic Analysis
No abstract provided.
Computational Imaging For Shape Understanding, Yuqi Ding
Computational Imaging For Shape Understanding, Yuqi Ding
LSU Doctoral Dissertations
Geometry is the essential property of realworld scenes. Understanding the shape of the object is critical to many computer vision applications. In this dissertation, we explore using computational imaging approaches to recover the geometry of realworld scenes. Computational imaging is an emerging technique that uses the codesigns of image hardware and computational software to expand the capacity of traditional cameras. To tackle face recognition in the uncontrolled environment, we study 2D color image and 3D shape to deal with body movement and selfocclusion. Especially, we use multiple RGBD cameras to fuse the varying pose and register the front face in …
The Construction And Estimation Of Hidden SemiMarkov Models, Kurdstan Abdullah, John Van Der Hoek
The Construction And Estimation Of Hidden SemiMarkov Models, Kurdstan Abdullah, John Van Der Hoek
Journal of Stochastic Analysis
No abstract provided.
The Thermodynamics Of A Stochastic Geometry Model With Applications To NonExtensive Statistics, O.K. Kazemi, A. Pourdarvish, J. Sadeghi
The Thermodynamics Of A Stochastic Geometry Model With Applications To NonExtensive Statistics, O.K. Kazemi, A. Pourdarvish, J. Sadeghi
Journal of Stochastic Analysis
No abstract provided.
2Dimensional String Problems: Data Structures And Quantum Algorithms, Dhrumilkumar Patel
2Dimensional String Problems: Data Structures And Quantum Algorithms, Dhrumilkumar Patel
LSU Master's Theses
The field of stringology studies algorithms and data structures used for processing strings efficiently. The goal of this thesis is to investigate 2dimensional (2D) variants of some fundamental string problems, including \textit{Exact Pattern Matching} and \textit{Longest Common Substring}.
In the 2D pattern matching problem, we are given a matrix $\M[1\dd n,1\dd n]$ that consists of $N = n \times n$ symbols drawn from an alphabet $\Sigma$ of size $\sigma$. The query consists of a $ m \times m$ square matrix $\PP[1\dd m, 1\dd m]$ drawn from the same alphabet, and the task is to find all the locations of $\PP$ …
Scheduling ManyTask Computing Applications For A Hybrid Cloud, Shifat Perveen Mithila
Scheduling ManyTask Computing Applications For A Hybrid Cloud, Shifat Perveen Mithila
LSU Doctoral Dissertations
A centralized scheduler can become a bottleneck for placing the tasks of a manytask application on heterogeneous cloud resources. Previously, it was demonstrated that a decentralized vector scheduling approach based on performance measurements can be used successfully for this task placement scenario. In this dissertation, we extend this approach to task placement based on latency measurements. Each node collects performance metrics from its neighbors on an overlay graph, measures the communication latency, and then makes local decisions on where to move tasks. We present a decentralized and a centralized algorithm for configuring the overlay graph based on latency measurements and …
Quantization Of The Poisson Type Central Limit Theorem (1), Yungang Lu
Quantization Of The Poisson Type Central Limit Theorem (1), Yungang Lu
Journal of Stochastic Analysis
No abstract provided.
Control And Planning For Mobile Manipulators Used In Large Scale Manufacturing Processes, Joshua T. Nguyen
Control And Planning For Mobile Manipulators Used In Large Scale Manufacturing Processes, Joshua T. Nguyen
LSU Master's Theses
Sanding operations in industry is one of the few manufacturing tasks that has yet to achieve automation. Sanding tasks require skilled operators that have developed a sense of when a work piece is sufficiently sanded. In order to achieve automation in sanding with robotic systems, this developed sense, or intelligence, that human operators have needs to be understood and implemented in order to achieve, at the minimum, the same quality of work. The system will also need to have the equivalent reach of a human operator and not be constrained to a single, small workspace. This thesis developed solutions for …
On A Relation Between Ado And LinksGould Invariants, Nurdin Takenov
On A Relation Between Ado And LinksGould Invariants, Nurdin Takenov
LSU Doctoral Dissertations
In this thesis we consider two knot invariants: AkutsuDeguchiOhtsuki(ADO) invariant and LinksGould invariant. They both are based on ReshetikhinTuraev construction and as such share a lot of similarities. Moreover, they are both related to the Alexander polynomial and may be considered generalizations of it. By experimentation we found that for many knots, the third order ADO invariant is a specialization of the LinksGould invariant. The main result of the thesis is a proof of this relation for a large class of knots, specifically closures of braids with five strands.