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The Subcritical Phase For A Homopolymer Model, Iddo Ben-Ari, Hugo Panzo
The Subcritical Phase For A Homopolymer Model, Iddo Ben-Ari, Hugo Panzo
Communications on Stochastic Analysis
No abstract provided.
Near-Martingale Property Of Anticipating Stochastic Integration, C R. Hwang, Hui-Hsiung Kuo, Kimiaki Saitô, Jiayu Zhai
Near-Martingale Property Of Anticipating Stochastic Integration, C R. Hwang, Hui-Hsiung Kuo, Kimiaki Saitô, Jiayu Zhai
Communications on Stochastic Analysis
No abstract provided.
An Option Pricing Model With Memory, Flavia Sancier, Salah Mohammed
An Option Pricing Model With Memory, Flavia Sancier, Salah Mohammed
Communications on Stochastic Analysis
No abstract provided.
Continuous Description Of Grain Boundaries Using Crystal Defect Fields: The Example Of A {3 1 0}/[0 0 1] Tilt Boundary In Mgo, Xiao Yu Sun, Patrick Cordier, Vincent Taupin, Claude Fressengeas, Bijaya B. Karki
Continuous Description Of Grain Boundaries Using Crystal Defect Fields: The Example Of A {3 1 0}/[0 0 1] Tilt Boundary In Mgo, Xiao Yu Sun, Patrick Cordier, Vincent Taupin, Claude Fressengeas, Bijaya B. Karki
Faculty Publications
Continuum dislocation/generalized-disclination modelling of a MgO {3 1 0}/[0 0 1] tilt boundary is proposed by using an atomistic-to-continuum crossover method. Using the relaxed and un-relaxed atomic positions obtained from first-principles simulations, calculation of the displacement, distortion (strain and rotation), curvature and second-order distortion fields is performed in the boundary area. The dislocation and disclination density fields are used to smoothly describe the discontinuities in the displacement and rotation fields across the boundary. In addition, a generalized-disclination density tensor field is introduced to reflect shear and stretch discontinuities across the boundary. This continuous model provides new mechanical insights into the …
Development Of Shale Gas Supply Chain Network Under Market Uncertainties, Jorge Chebeir, Aryan Geraili, Jose Romagnoli
Development Of Shale Gas Supply Chain Network Under Market Uncertainties, Jorge Chebeir, Aryan Geraili, Jose Romagnoli
Faculty Publications
The increasing demand of energy has turned the shale gas and shale oil into one of the most promising sources of energy in the United States. In this article, a model is proposed to address the long-term planning problem of the shale gas supply chain under uncertain conditions. A two-stage stochastic programming model is proposed to describe and optimize the shale gas supply chain network. Inherent uncertainty in final products' prices, such as natural gas and natural gas liquids (NGL), is treated through the utilization of a scenario-based method. A binomial option pricing model is utilized to approximate the stochastic …
Faster-Than-Nyquist Signaling: An Overview, Jiancun Fan, Shengjie Guo, Xiangwei Zhou, Yajie Ren, Geoffrey Ye Li, Xi Chen
Faster-Than-Nyquist Signaling: An Overview, Jiancun Fan, Shengjie Guo, Xiangwei Zhou, Yajie Ren, Geoffrey Ye Li, Xi Chen
Faculty Publications
Faster-than-Nyquist (FTN) signaling can improve the bandwidth utilization. In this paper, we will provide a comprehensive survey on the topic. The history and the applications of FTN signaling are first introduced. Then, the basic principles and the system framework of FTN signaling are presented. Next, more details on transmitter and receiver optimization are discussed. Finally, the current research challenges on FTN signaling are identified and conclusions are provided.
Species Richness And Abundance Of Freshwater Mussels In Tributaries Of The Lower Pearl River Basin, Corinne Nicole Bird
Species Richness And Abundance Of Freshwater Mussels In Tributaries Of The Lower Pearl River Basin, Corinne Nicole Bird
LSU Master's Theses
Freshwater mussels play a vital role in their ecosystems, influencing processes such as nutrient cycling and water filtration. In addition, they provide and improve habitat for other organisms. North America is home to the most species-rich freshwater bivalve fauna in the world, but most stream systems in the U.S. have been severely degraded, and future freshwater mussel extinction rates are estimated at 6.4 percent per decade. The Pearl River Basin is a significant area of aquatic species diversity and has a complex watershed land use mosaic, providing an excellent opportunity to investigate the relative importance of local and landscape level …
Sediment Infilling Of Louisiana Continental-Shelf Dredge Pits: A Record Of Sedimentary Processes In The Northern Gulf Of Mexico, Meg Cathlin O'Connor
Sediment Infilling Of Louisiana Continental-Shelf Dredge Pits: A Record Of Sedimentary Processes In The Northern Gulf Of Mexico, Meg Cathlin O'Connor
LSU Master's Theses
Sediment cores were collected at continental-shelf sites of the Northern Gulf of Mexico off the coast of Louisiana to develop a better understanding of post-dredging evolution of mud-capped dredge pits. The two pits studied were Sandy Point (SP) and Raccoon Island (RI) (both with water depths of ~10m and dredged to ~ 15-20 m below water surface), which were dredged in 2012 and 2013 respectively. Vibracores and multicores were collected in 2015. Preliminary radiochemistry analyses identified Beryllium-7 distribution in multicore samples from both sites. SP1, the northwestern site in the Sandy Point dredge pit, showed 26 cm of 7Be penetration. …
Development And Application Of A Modis Inorganic Sediment Model During The 2016 Mississippi River Diversion In Lake Pontchartrain, Louisiana, Robert Lee Iles Iv
Development And Application Of A Modis Inorganic Sediment Model During The 2016 Mississippi River Diversion In Lake Pontchartrain, Louisiana, Robert Lee Iles Iv
LSU Master's Theses
The Bonnet Carré Spillway (BCS) is a Mississippi River diversion located on the southwestern coastline of Lake Pontchartrain in Louisiana. The discharge of potentially high amounts of Mississippi River nutrients and sediments during BCS diversion events has a noted ecological impact on the Lake Pontchartrain estuary. Projected river flooding prompted the opening of the Spillway from 10 January to 1 February 2016. MODIS satellite images were aerosol-corrected and then compared to in-situ measurements of inorganic sediment concentration (ISC) to derive a predictive algorithm for estimating ISC (in mg L^-1) in Lake Pontchartrain for satellite images in January and February. The …
Development Of A Low-Energy Monoenergetic Electron Separator, Sergio Martín López Cáceres
Development Of A Low-Energy Monoenergetic Electron Separator, Sergio Martín López Cáceres
LSU Master's Theses
The aim of this project is to build a prototype device that can select electrons of certain energy in order to have a monoenergetic beam suitable for the characterization of radiation detectors. Current options for sources of electrons are either from radioisotopes or accelerator facilities. Radioisotope sources are not tunable in energy since they depend on the nuclear and atomic structures of the daughter nucleus. On the other hand, even though accelerators offer the feature of a variable energy beam, they have limited availability and are not typically run at low intensities. Therefore, the motivation for this thesis is the …
Coasteering, Adam James Meistrell
Coasteering, Adam James Meistrell
LSU Master's Theses
Coasteering: (noun) An adventure sport tasked with defining and exploring boundaries and coastlines. Adam Meistrell’s artwork is an invitation to interpret evidence and inspiration through making, investigation, and utility. He utilizes a variety of working methods to interpret evidence and share his understanding.
A New Computational Framework For Efficient Parallelization And Optimization Of Large Scale Graph Matching, Sahar Marefat Navaz
A New Computational Framework For Efficient Parallelization And Optimization Of Large Scale Graph Matching, Sahar Marefat Navaz
LSU Doctoral Dissertations
There are so many applications in data fusion, comparison, and recognition that require a robust and efficient algorithm to match features of multiple images. To improve accuracy and get a more stable result is important to take into consideration both local appearance and the pairwise relationship of features. Graphs are a powerful and flexible data structure, allowing for the description of complex relationships between data elements, whose nodes correspond to salient features and edges correspond to relational aspects between features. Therefore, the problem of graph matching is to find a mapping between the two sets of nodes that preserves the …
On Braids, Branched Covers And Transverse Invariants, Jose Hector Ceniceros
On Braids, Branched Covers And Transverse Invariants, Jose Hector Ceniceros
LSU Doctoral Dissertations
In this work, we present a brief survey of knot theory supported by contact 3-manifolds. We focus on transverse knots and explore different ways of studying transverse knots. We define a new family of transverse invariants, this is accomplished by considering $n$-fold cyclic branched covers branched along a transverse knot and we then extend the definition of the BRAID invariant $t$ defined in cite{BVV} to the lift of the transverse knot. We call the new invariant the lift of the BRAID invariant and denote it by $t_n$. We then go on to show that $t_n$ satisfies a comultiplication formula and …
Decentralized Scheduling For Many-Task Applications In The Hybrid Cloud, Brian Lyle Peterson
Decentralized Scheduling For Many-Task Applications In The Hybrid Cloud, Brian Lyle Peterson
LSU Doctoral Dissertations
While Cloud Computing has transformed how we solve many computing tasks, some scientific and many-task applications are not efficiently executed on cloud resources. Decentralized scheduling, as studied in grid computing, can provide a scalable system to organize cloud resources and schedule a variety of work. By measuring simulations of two algorithms, the fully decentralized Organic Grid, and the partially decentralized Air Traffic Controller from IBM, we establish that decentralization is a workable approach, and that there are bottlenecks that can impact partially centralized algorithms. Through measurements in the cloud, we verify that our simulation approach is sound, and assess the …
Computational Studies On Fluid And Particle Dynamics, Chenguang Zhang
Computational Studies On Fluid And Particle Dynamics, Chenguang Zhang
LSU Doctoral Dissertations
This dissertation is divided into two parts. The first part includes chapter 2 to 4, which focus on development and application of numerical algorithm on particle and fluid simulation. Starting with a pure granular system in a driven cavity setup (Chapter 2), we move on to the immersed boundary simulation of fluid solid interaction (Chapter 3). This part ends with a coupled immersed boundary-discrete particle implementation. The second part includes Chapter 5 and Appendix A, each deals with an independent problem and focuses more on the theoretical aspects. Chapter 5 deals with a classic fluid dynamics problem of thermal wave …
Assessing The Effects Of The Smartphone As A Learning Tool On The Academic Achievement And Motivation Of High School Agriculture Students In Louisiana, Henry Eric Smith
Assessing The Effects Of The Smartphone As A Learning Tool On The Academic Achievement And Motivation Of High School Agriculture Students In Louisiana, Henry Eric Smith
LSU Doctoral Dissertations
Perhaps the most influential device in modern society is the smartphone. Over 90% of Americans aged 18-29 own a smartphone and 74% of teenagers reported using a smartphone as their primary internet connection. Students perceived that using smartphones in the classroom aided learning. However, two-thirds of American high schools ban students from using phones in the classroom. Secondary science curriculum focuses on subjects that regard the biodiversity of plant and animal species, but disregard the student’s ability to identify species. Consequently, secondary students in general are very poor at identifying species of trees. Previous research supports the idea that advanced …
Improved Protein Characterizations Using Ionic Liquids: Page And Maldi-Ms, Punprabhashi Vidanapathirana
Improved Protein Characterizations Using Ionic Liquids: Page And Maldi-Ms, Punprabhashi Vidanapathirana
LSU Doctoral Dissertations
Protein separation by polyacrylamide gel electrophoresis (PAGE) and identification by matrix assisted laser desorption ionization-mass spectrometry (MALDI-MS) are primary tools of protein analysis. In these techniques, surfactants are used in protein sample preparation in order to enhance the protein solubility. Conventional surfactants have shown limitations in protein analysis due to the structural complexity of proteomes, resulting in low resolution. The research goal of this dissertation is to address some of these limitations by applying novel cationic ionic liquid surfactants (ILS), N-alkyl-4-methyl pyridinium bromide (CnPBr where n=4, 8, 11). The ILS would be suitable candidates to be used in PAGE protein …
Manifestations Of Symmetry In Polynomial Link Invariants, Kyle Istvan
Manifestations Of Symmetry In Polynomial Link Invariants, Kyle Istvan
LSU Doctoral Dissertations
The use and detection of symmetry is ubiquitous throughout modern mathematics. In the realm of low-dimensional topology, symmetry plays an increasingly significant role due to the fact that many of the modern invariants being developed are computationally expensive to calculate. If information is known about the symmetries of a link, this can be incorporated to greatly reduce the computation time. This manuscript will consider graphical techniques that are amenable to such methods. First, we discuss an obstruction to links being periodic, developed jointly with Dr. Khaled Qazaqzeh at Kuwait University, using a model developed by Caprau and Tipton. We will …
Songs From Liquid Days By Philip Glass: A Performer's Guide, Jonathan Michael Ray
Songs From Liquid Days By Philip Glass: A Performer's Guide, Jonathan Michael Ray
LSU Doctoral Dissertations
The purpose of this research project is to provide the reader and the prospective performer with a comprehensive view of the song cycle Songs from Liquid Days by Philip Glass. Chapter 1 of this document gives a brief compositional history of the cycle. Chapter 2 provides biographical sketches of the composer and the cycle’s four poets: Paul Simon, Suzanne Vega, David Byrne, and Laurie Anderson. Chapter 3 discusses performance practice suggestions for Songs from Liquid Days, including commentary on tempo, style, ensemble choices, pacing, and analyses of both text and music. Chapter 4 compares the artistic interpretations of the 1986 …
Reduced Order Models For Beam-Wave Interaction In High Power Microwave Sources, Lokendra Singh Thakur
Reduced Order Models For Beam-Wave Interaction In High Power Microwave Sources, Lokendra Singh Thakur
LSU Doctoral Dissertations
We apply an asymptotic analysis to show that corrugated waveguides can be represented as cylindrical waveguides with smooth metamaterial coatings when the corrugtions are subwavelength. Here the metamaterial delivers an effective anisotropic surface impedance, effective dielectric constant, and imparts novel dispersive effects on signals traveling inside the waveguide. These properties arise from the subwavelength resonances of the metamaterial. For sufficiently deep corrugations, the waveguide exhibits backward wave propagation, which can be understood in the present context as a multi-scale phenomenon resulting from local resonances inside the subwavelength geometry. Our approach is well suited to numerical computation and we provide a …
Mining Social Media Data For Improved Understanding Of Disaster Resilience, Lei Zou
Mining Social Media Data For Improved Understanding Of Disaster Resilience, Lei Zou
LSU Doctoral Dissertations
Disaster resilience is the capacity of a community to ‘bounce back’ from disastrous events, by effecting resilience building activities through the four phases of emergency management – preparedness, response, recovery, and mitigation. However, data describing a community’s behaviors in each phase are difficult to access in traditional databases. Social media data provide an innovative data source to better understand communities’ responses and behaviors in each phase of emergency management during disasters, and thus could ultimately monitor and enhance disaster resilience. This study analyzes the spatial-temporal patterns of Twitter activities during Hurricane Sandy, which struck the northeastern United States on October …
Exploring Social Indicators Of Situational Interest In Physical Education And Activity Classes: Integration Of Interest And Self-Determination Theories, Joseph Opiri Otundo
Exploring Social Indicators Of Situational Interest In Physical Education And Activity Classes: Integration Of Interest And Self-Determination Theories, Joseph Opiri Otundo
LSU Doctoral Dissertations
It is clearly documented that physically active lifestyles result in numerous health benefits. Unfortunately, a majority of individuals do not meet recommended physical activity (PA) guidelines. Physical education (PE) courses provide avenues for students to increase PA. Teachers and public health officials identify the importance of student motivation constructs such as interest in promoting PA behaviors and other healthy life habits. The purposes of this dissertation were to advance the measurement of situational interest by investigating social indicators derived from self-determination theory (SDT), and to test a theoretical model that integrates interest theory and SDT. Two quantitative studies were designed …
A Narrative Of A Teacher's Perspective Of Over-Age Students Who Are Out-Of-Grade In The Middle School Classroom, Melissa J. Porter
A Narrative Of A Teacher's Perspective Of Over-Age Students Who Are Out-Of-Grade In The Middle School Classroom, Melissa J. Porter
LSU Doctoral Dissertations
This research sought to understand the impact on the middle school classroom environment of over-age students who are out-of-grade. A qualitative study utilizing a narrative lens examined the stories of the lived experiences of the teachers of these students; a social constructivism theoretical approach explored the teaching and best practices in their classrooms. These teachers provided an insight into the complexity of teaching and gave voice to managing a classroom where emotionally and physically mature students often pose a significant challenge to the classroom environment; moreover, their positive influence on the teaching space in which they inhabit also was explored …
Analytical Solutions And Multiscale Creep Analysis Of Functionally Graded Cylindrical Pressure Vessels, Jasem Amjad Ahmed
Analytical Solutions And Multiscale Creep Analysis Of Functionally Graded Cylindrical Pressure Vessels, Jasem Amjad Ahmed
LSU Doctoral Dissertations
This study deals with the time-dependent creep analysis of functionally graded thick-cylinders under various thermal and mechanical boundary conditions. Firstly, exact thermoelastic stress, and iterative creep solutions for a heat generating and rotating cylindrical vessel made of functionally graded thermal and mechanical properties are proposed. Equations of equilibrium, compatibility, stress-strain, and strain-displacement relations are solved to obtain closed-form initial stress and strain solutions. It is found that material gradient indices have significant influences on thermoelastic stress profiles. For creep analysis, Norton’s model is incorporated into rate forms of the above-mentioned equations to obtain time-dependent stress and strain results using an …
Tribological And Dynamical Study Of An Automotive Transmission System, Meng Li
Tribological And Dynamical Study Of An Automotive Transmission System, Meng Li
LSU Doctoral Dissertations
The transmission system is critical for automotive and heavy duty equipment due to its prominent role in the powertrain system, which is often challenged with degraded torque capacity and harsh dynamic response. Simulation-guided design can provide appropriate guidelines to resolve these problems with virtual analyses. In current study, the tribological and dynamical study of an automatic transmission is performed at two levels: a wet clutch and powertrain. In this dissertation, tribological study is performed for a wet clutch based on the thermohydrodynamic (THD) analysis that takes the following factors into account. • The groove effect (depth, area, and pattern) is …
Sediment Transport And Slope Stability In The Northern Gulf Of Mexico, Jeffrey Blake Obelcz
Sediment Transport And Slope Stability In The Northern Gulf Of Mexico, Jeffrey Blake Obelcz
LSU Doctoral Dissertations
Sediment transport and slope stability are fundamental organizing agents of the geological record. These processes have been extensively studied along the northern margin of the Gulf of Mexico basin for both basic and applied purposes, but our knowledge of them is limited by the spatial and temporal sampling capabilities of traditional geologic oceanographic surveying tools such as coring, single-beam echosounders, and sidescan sonar. This dissertation seeks to update the state of knowledge regarding northern Gulf of Mexico sediment transport and slope stability from annual to millennial timescales, primarily using relatively high-resolution acoustic geophysical tools such as swath bathymetric echosounders and …
Symbolic And Deep Learning Based Data Representation Methods For Activity Recognition And Image Understanding At Pixel Level, Manohar Karki
Symbolic And Deep Learning Based Data Representation Methods For Activity Recognition And Image Understanding At Pixel Level, Manohar Karki
LSU Doctoral Dissertations
Efficient representation of large amount of data particularly images and video helps in the analysis, processing and overall understanding of the data. In this work, we present two frameworks that encapsulate the information present in such data. At first, we present an automated symbolic framework to recognize particular activities in real time from videos. The framework uses regular expressions for symbolically representing (possibly infinite) sets of motion characteristics obtained from a video. It is a uniform framework that handles trajectory-based and periodic articulated activities and provides polynomial time graph algorithms for fast recognition. The regular expressions representing motion characteristics can …
Nanoscale Studies Of Proteins And Thin Films Using Scanning Probe Microscopy, Zachary Lane Highland
Nanoscale Studies Of Proteins And Thin Films Using Scanning Probe Microscopy, Zachary Lane Highland
LSU Doctoral Dissertations
Nanostructures of organosilanes, thin metal films, and protein nanopatterns were prepared and analyzed with atomic force microscopy (AFM). Organosilanes with designed functional groups were used to selectively pattern green fluorescent protein at the nanoscale using protocols developed with particle lithography. Mesospheres are deposited onto a substrate to produce a surface mask. Organosilanes are deposited to form a matrix film surrounding nanopores for depositing proteins. The nanopatterns were characterized using AFM, after steps of particle lithography for directly visualizing surface changes. Studies with AFM also provide a compelling tool for teaching undergraduates to introduce concepts of nanoscience. An undergraduate laboratory was …
Performance Evaluation Of Virtual Flow Metering Models And Its Application To Metering Backup And Production Allocation, Kahila Mokhtari Jadid
Performance Evaluation Of Virtual Flow Metering Models And Its Application To Metering Backup And Production Allocation, Kahila Mokhtari Jadid
LSU Doctoral Dissertations
In the oil and gas industry, reliable and accurate measurements of the amount of oil, gas and water being produced by individual wells is essential. The production revenue for each well is determined from measured flow rates. Measurement of well production can be achieved by using multiphase flow meters on individual wells. However, the use of such metering technique is not always reliable or economical. As an alternative technique to monitoring individual well performance in real-time, multiphase flow simulators together with pressure and temperature sensors located at different locations in the production systems have been recently deployed to estimate individual …
On The Skein Theory Of 0-Framed Surgery Along The Trefoil Knot, Andrew Robert Holmes
On The Skein Theory Of 0-Framed Surgery Along The Trefoil Knot, Andrew Robert Holmes
LSU Doctoral Dissertations
In this dissertation, we will give a generating set of the Kauffman bracket skein module over the field Q(A) of 0-framed surgery along the trefoil knot. This generating set is described as a certain subset of a known basis for the skein module over Z[A^±1] of the trefoil exterior.