Digital Commons Network^™

Field Performance And Cost Effectiveness Of Crack Sealing In Flexible And Composite Pavements, Momen Ragab Mousa

LSU Doctoral Dissertations

Surface cracking is one of the major surface distresses in asphalt concrete (AC) pavement, allowing water infiltration through the cracks, causing stripping in asphalt pavement layers, and weakening and deteriorating the base and/or subgrade. Its treatment, therefore, is one of the major activities in pavement preservation for many state DOTs. Among the various treatment methods currently available to preserve AC pavement with existing surface cracking are various forms of crack sealing. Crack sealing is not a common practice to Louisiana highways since the benefit of such treatment appears to be affected by the elevation of the ground water table. Studies …

Efficiency Enhancements Of A Restricted Stochastic Search Algorithm For Locating Local And Global Minima, William C. Mckee, Saurin H. Rawal, Ye Xu

Faculty Publications

Kick is a simple computational method that enables stochastic searches for stable structures of systems of up to ∼15 atoms. We propose two new filters to be applied with Kick to enforce minimum bond lengths between all pair of atoms and connectivity of all atoms in candidate structures. As this Restricted Kick method rejects a rapidly increasing number of structures with increasing system size, we furthermore devised the restricted Random Assembly Stochastic Search method, which randomly assembles structures that automatically satisfy these filters. Significant improvements in convergence rate over the original Kick method are obtained for several well-established examples.

Examining Values Of E-Luxury Among Young Consumers, Nancy Haddad

LSU Master's Theses

Over the past few years, changes in technology, especially the increased use of online shopping, has impacted fashion retailers. Many brands, such as luxury brands, have recognized the online shopping potential and have engaged in setting up their websites in ways that are geared towards meeting luxury consumers’ online shopping needs. Previous research has examined consumers’ luxury consumptions, but there is no known study that has examined young consumers online luxury consumption and which value perceptions can impact shopping intentions. Therefore, the purpose of the current study is to shed some light on understanding young consumers’ online luxury consumption. Specifically, …

Evaluation Of Traffic Speed Deflectometer For Pavement Structural Evaluation In Louisiana, Zia Uddin Ahmed Zihan

LSU Master's Theses

Many state agencies have recognized the importance of incorporating pavement structural conditions in the selection of maintenance and rehabilitation (M&R) strategies along with functional indices. To measure in-service pavement structural capacity, surface deflection under a defined load has been typically used. The Rolling Wheel Deflectometer (RWD) and Traffic Speed Deflectometer (TSD) have emerged as continuous pavement deflection-measuring devices as they operate at traffic speed and reduces lane closure and user delays.

The research objective of this study was to assess the feasibility of using TSD measurements at the network-level for pavement conditions structural evaluation in Louisiana. To achieve the objectives …

Deconstructing Piatti: Exploring Underlying Physiological Challenges In The 12 Caprices For Solo Cello, Unusdian Errandonea

LSU Doctoral Dissertations

Composed in 1865 and first published in 1874, Alfredo Piatti’s 12 Caprices for Solo Cello, Op.25 have become one of the most widely-used volumes of technical studies for cello students. A virtuoso cellist, influential teacher, and prolific composer dubbed “The Paganini of the Cello” by Franz Liszt, his complete command of the cello allowed him to push the limits of the instrument in an era when the virtuoso solo cello repertoire was just starting to flourish. To this day, the study of the Caprices is still tremendously helpful–and often required by teachers as material for developing the highest level of …

Graph Information Processing For Artificial Intelligence, Limeng Pu

LSU Doctoral Dissertations

In the last decade, techniques for artificial intelligence (AI) has advanced tremendously, which lead to solutions to many problems that have long-troubled us. Such examples include image/video recognition, speech recognition, and 3D scenario recognition. As the tool become more and more powerful, we started to explore data types that have never been handled in an AI fashion. Graph is undoubtedly the first one that comes to mind. Many important real-life data is or can be represented as graphs or networks: social networks, communication networks, protein-protein interaction networks, molecular structures, etc. Yet very little attention has been devoted to the study …

Characterization Of Genes Required For Both Rpg1 And Rpg4-Mediated Wheat Stem Rust Resistance In Barley, Shyam Solanki, Jonathan Richards, Gazala Ameen, Xue Wang, Atiya Khan, Harris Ali, Alex Stangel, Prabin Tamang, Thomas Gross, Patrick Gross, Thomas G. Fetch, Robert S. Brueggeman

Faculty Publications

Background: Puccinia graminis f. sp. tritici (Pgt) race TTKSK and its lineage pose a threat to barley production world-wide justifying the extensive efforts to identify, clone, and characterize the rpg4-mediated resistance locus (RMRL), the only effective resistance to virulent Pgt races in the TTKSK lineage. The RMRL contains two nucleotide-binding domain and leucine-rich repeat (NLR) resistance genes, Rpg5 and HvRga1, which are required for resistance. The two NLRs have head-to-head genome architecture with one NLR, Rpg5, containing an integrated C-terminal protein kinase domain, characteristic of an "integrated sensory domain" resistance mechanism. Fast neutron mutagenesis of line Q21861 was utilized in …

Using Systematic Prompt Fading To Program A Self-Questioning Strategy With Elementary Students With Disabilities, Leah Michelle Turner

LSU Doctoral Dissertations

Standardized assessments are focused on integrating knowledge from multiple sources and developing composed written responses. This requires the students to be able to read and comprehend on grade level, within the various subject areas (reading, math, science, and social studies), which are skills students with disabilities struggle to do. The purpose of the study was to use a systematic prompt fading procedure as a vehicle to program a self-questioning strategy for students with disabilities. The intervention package occurred in seven phases: baseline, embedded questions training, embedded questions independent practice, self-questioning training, self-questioning independent practice, self-questioning fading, and maintenance. A systematic …

A Study On Large-Scale Deep Learning In Bioinformatics And Biomedical Applications, Shayan Shams

LSU Doctoral Dissertations

Recent advances in Artificial Intelligence and deep learning have provided researchers in various fields insights into the analysis of multiple datasets. These applications include image analysis, text analysis, and many more. However, the effectiveness of deep learning in some areas, such as biomedical imaging and genomic research, has been overshadowed by the variance in the types and complexity of data. This is in addition to the expensive labeling process and the limited size of datasets in these fields. These challenges require advanced deep learning models capable of learning from a small dataset and also from a small number of labeled …

Habitat Preference Modulates Transoceanic Dispersal In A Terrestrial Vertebrate, Mozes P.K. Blom, Nicholas J. Matzke, Jason G. Bragg, Evy Arida, Christopher C. Austin, Adam R. Backlin, Miguel A. Carretero, Robert N. Fisher, Frank Glaw, Stacie A. Hathaway, Djoko T. Iskandar, Jimmy A. Mcguire, Benjamin R. Karin, Sean B. Reilly, Eric N. Rittmeyer, Sara Rocha, Mickaël Sanchez, Alexander L. Stubbs, Miguel Vences, Craig Moritz

Faculty Publications

© 2019 The Author(s) Published by the Royal Society. All rights reserved. The importance of long-distance dispersal (LDD) in shaping geographical distributions has been debated since the nineteenth century. In terrestrial vertebrates, LDD events across large water bodies are considered highly improbable, but organismal traits affecting dispersal capacity are generally not taken into account. Here, we focus on a recent lizard radiation and combine a summary-coalescent species tree based on 1225 exons with a probabilistic model that links dispersal capacity to an evolving trait, to investigate whether ecological specialization has influenced the probability of trans-oceanic dispersal. Cryptoblepharus species that occur …

Stray Radiation Dose From X-Ray And Proton Beam Radiation Therapies, Christopher William Schneider

LSU Doctoral Dissertations

The growing population of cancer survivors at risk of radiation induced side-effects is a public health concern. These side-effects include serious conditions such as second cancers, the majority of which occur outside of the primary treatment volume. Radiotherapy treatment planning systems systematically underestimate the dose to tissues out-of-field. Attempts to predict and reduce the risks of radiogenic side effects require accurate and personalized knowledge of the out-of-field radiation dose to patients. The long-term goal of this research is to provide clinical and research tools necessary to reduce the risk of radiotherapy side effects and improve the health outcomes of radiotherapy …

Examining Two Self-Assessment Measures Of Teacher Multicultural Competence And Their Predictive Value To Student Behavior Outcomes, Melissa Jo Hamilton Grisdale

LSU Doctoral Dissertations

Multicultural competence is a construct that has been discussed in the education literature as an essential skill for teachers' success in reaching all children in the classroom. The current study advances the literature on multicultural competence, specifically pertaining to teachers within their classrooms. Additional evidence was found building upon the technical adequacy of two, theoretically different, measures of teacher multicultural competence. Teachers who received a greater number of hours of multicultural training had significantly higher self-efficacy regarding engaging in culturally responsive teaching practices, than those who had received fewer hours. This study also replicated previous research (Hamilton, 2016) finding that …

Secure And Efficient Bft Consensus For Blockchains, Mohammad Mussadiq Jalalzai

LSU Doctoral Dissertations

Blockchains are simple data structures, containing transactions organized into blocks, in which each block points to a previous block using its hash. Thus, by following the chain, we can follow the history of transactions. Blocks are added to the chain through a consensus mechanism. Byzantine Fault Tolerant (BFT) consensus protocols that were designed before blockchains were introduced are usually considered appropriate for use in small scale networks of size 10-20 replicas. Blockchains have changed this trend as the blockchain networks usually require a larger number of replicas and classic BFT protocols cannot provide acceptable performance in large networks. One of …

High-Resolution Spectroscopy Of Boyajian's Star During Optical Dimming Events, M. J. Martínez González, C. González-Fernández, A. Asensio Ramos, H. Socas-Navarro, C. Westendorp Plaza, T. S. Boyajian, J. T. Wright, A. Collier Cameron, J. I. González Hernández, G. Holgado, G. M. Kennedy, T. Masseron, E. Molinari, J. Saario, S. Simón-Díaz, B. Toledo-Padrón

Faculty Publications

Boyajian's star is an apparently normal main-sequence F-type star with a very unusual light curve. The dipping activity of the star, discovered during the Kepler mission, presents deep, asymmetric, and aperiodic events. Here we present high-resolution spectroscopic follow-up during some dimming events recorded post-Kepler observations, from ground-based telescopes. We analyse data from the HERMES, HARPS-N, and FIES spectrographs to characterize the stellar atmosphere and to put some constraints on the hypotheses that have appeared in the literature concerning the occulting elements. The star's magnetism, if existing, is not extreme. The spots on the surface, if present, would occupy 0.02 per …

Approaches For Sample Characterization And Lithography With Nanoparticles Using Modes Of Scanning Probe Microscopy, Jayne C. Garno, Temitope O. Jegede, Kathryn B. Mckee, Melissia Porter, Autumn E. Webb, Jin Gyun Lee, Neepa Mk Kuruppu Arachchige, Justin R. Ragains, Noémie Elgrishi

Faculty Publications

Measurement and imaging modes of scanning probe microscopy (SPM) have been routinely applied for characterizing systems of nanoparticles; however the evolution of fabrication methods to prepare arrangements of nanoparticles remains a challenge. Reproducible fabrication of surface structures which integrate nanoparticles within ultra-small patterns will require innovative approaches to achieve high throughput and precision. Strategies for nanoscale lithography have been introduced for preparing defined arrangements of nanoparticles on surfaces based on physical or chemical interactions. For example, physisorption was employed for attaching nanoparticles based on colloidal lithography and site-directed assembly. Microfabricated atomic force microscope (AFM) tips with capillary channels have been …

Mechanistic Perspectives In The Regioselective Indole Addition To Unsymmetrical Silyloxyallyl Cations, Caitlin G. Bresnahan, Kiara A. Taylor-Edinbyrd, Alexander H. Cleveland, Joshua A. Malone, Nitin S. Dange, Anne Milet, Revati Kumar, Rendy Kartika

Faculty Publications

© 2019 American Chemical Society. Our investigations on the reaction mechanism to account for regioselectivity on the addition of indoles to unsymmetrical silyloxyallyl cations are reported. Using both experimental and computational methods, we confirmed the significance of steric effects from the silyl ether group toward directing the inward approach of indoles, leading to nucleophilic attack at the less substituted electrophilic α′-carbon. The role of residual water toward accelerating the rate of reaction is established through stabilization of the participating silyloxyallyl cation.

Mapping Soil Moisture From Remotely Sensed And In-Situ Data With Statistical Methods, Yaping Xu

LSU Doctoral Dissertations

Soil moisture is an important factor for accurate prediction of agricultural productivity and rainfall runoff with hydrological models. Remote sensing satellites such as Soil Moisture Active Passive (SMAP) offer synoptic views of soil moisture distribution at a regional-to-global scale. To use the soil moisture product from these satellites, however, requires a downscaling of the data from an usually large instantaneous field of view (i.e. 36 km) to the watershed analysis scales ranging from 30 m to 1 km. In addition, validation of the soil moisture products using the ground station observations without an upscaling treatment would lead to cross-level fallacy. …

Rare Earth Geochemistry Of Apatitic Fossils From The Middle-Upper Ordovician Southern Margin Of Laurentia, Rafael Adrian Villanueva

LSU Master's Theses

Widespread deposition of phosphate and a transition from tropical to cool water carbonates is seen throughout Middle-Upper Ordovician Nashville Dome area spanning the M4/M5 sequence boundary. Hypotheses explaining the onset of these lithologic changes have included the onset of glaciation, drawdown of CO₂ related to the Guttenburg Isotope Carbon Excursion (GICE), and siliciclastic weathering, yet none of these studies have provided definitive evidence that shows any of these are the sole factor driving paleoenvironmental changes across the M4/M5 boundary. In order to test whether rapid subsidence along the southeastern margin of Laurentia may have caused an influx of phosphate …

So Long, Sinkhole City!, Heather Molecke

LSU Master's Theses

Abstract

A sinkhole is land that appears structurally sound, but underneath its surface lacks foundation. If there is not enough support for the land above, a sudden collapse of the surface happens. Sinkhole City is a conceptual three-part installation that metaphorically conveys experiences of childhood sexual abuse, incarceration in adolescent psychiatric hospitals, and young adult drug addiction. This work illuminates and explores the relationship between childhood trauma and drug addiction.

Sinkhole City takes the viewer on a journey through semi-autobiographical life passages. In this three-part installation assemblage I am confronting my own sense of past shame, the emotional roller coaster …

Qualitative And Quantitative Flow Visualization Studies On A Distorted Hydraulic Physical Model, Patrick Scott

LSU Master's Theses

The submergence of coastal wetlands in south Louisiana leaves communities, commerce, industry, and ecosystems vulnerable to extreme weather events and human and natural disasters. The state of Louisiana has developed a plan to mitigate coastal land loss and with the help of Louisiana State University and the Lower Mississippi River Physical Model, projects like large scale sediment diversions will be extensively tested and researched to ensure proper implementation and operation. Due to scaling and distortion of the physical model, complete similitude with its prototype is not expected and scale effects are anticipated to affect the hydrodynamics and, as a result, …

Cognitive Intra-Individual Variability: The Effects Of Affect In A Healthy Young Adult Sample, Tovah M.D. Cowan

LSU Master's Theses

Cognition is foundational to our experience of the world, but also to how psychologists understand dysfunctions. Cognitive impairment is a feature of a variety of mental disorders, but traditional assessment measures have key limitations in prediction and classification. A proposed alternative is cognitive intraindividual variability (cIIV), which is suggested to measure cognitive control or neural inefficiencies, fluctuating within a task, or over short periods of time. cIIV has been shown to be more sensitive in classification for a variety of conditions than overall performance, including in affective disorders. Further, some research suggests that cIIV is related to self-report cognitive abilities, …

Atmospheric Deposition Of Nitrogen And Sulfur In China: Current Status And Future Changes, Cheng Shi

LSU Master's Theses

Dry and wet deposition of nitrogen (N) and sulfur (S) has detrimental impacts on the health of both human and ecosystems. Intensive human activities are responsible for elevating emissions and deposition of N and S species. Large population and fast industrial development led China to one of the countries with highest acid deposition. The large fluxes of N and S deposition have caused acidification of surface water and soil, which damages plant growth and biodiversity in China. N and S deposition has been investigated using ground-based monitoring networks and satellite-based sensors. The limitation of location of monitoring sites and performance …

Evaluation Of Post-Harvest Procedures For Quality Enhancement In The Louisiana Commercial Shrimp Industry, Nicholas Alan Haddad

LSU Master's Theses

The Louisiana commercial shrimp fishery has faced numerous challenges and is declining at an alarming rate. The opportunity may exist to add value to the industry by creating a superior product through optimal operating procedures. Post-harvest processes of plate freezing were analyzed to develop a high-quality shrimp product capable of fostering economic growth for fishermen. Quantifiable data was collected via overnight trips onboard plate freezing boats and at plate freezing docks. Sulfite-free melanosis prevention testing occurred by exploring the use of 4-hexylresorcinol treatments, in combination with vacuum packaging and modified atmosphere packaging, to delay the onset of black spot. Physical …

Assessing Louisiana State University College Of Agriculture Faculty Members' Cultural Intelligence And Kenyan Workshop Participants' Knowledge And Attitude Towards International Development Projects, Cristina Cossich

LSU Doctoral Dissertations

The main objective of this dissertation was to assess Louisiana State University College of Agriculture Faculty Members' Cultural Intelligence and Kenyan Workshop Participants' Knowledge and Attitude towards International Development Projects. The study examines key aspects that contribute to the implementation of international development projects: describing the landscape of what is known about international development projects in Kenya; assessing perceptions of faculty members of a southern United States land-grant university who are in charge of the development and implementation of international development projects; and evaluation of program impacts on selected local participants of a project in Kenya.

The overall findings of …

Modeling Melodic Dictation, David John Baker

LSU Doctoral Dissertations

Melodic dictation is a cognitively demanding process that requires students to hear a melody, then without any access to an external reference, transcribe the melody within a limited time frame. Despite its ubiquity in curricula within School of Music settings, exactly how an individual learns a melody is not well understood. This dissertation aims to fill the gap in the literature between aural skills practitioners and music psychologists in order to reach conclusions that can be applied systematically in pedagogical contexts. In order to do this, I synthesize literature from music theory, music psychology, and music education in order to …

Examining Successful Aging And Resilience After Disasters, Katie Elizabeth Stanko

LSU Doctoral Dissertations

Resilience, a psychological adaptive process and outcome, is the ability to return to normal functioning after a traumatic event, such as a natural disaster. Successful aging entails biological, psychological, and social factors. The Great Flood of 2016 in the greater Baton Rouge area caused catastrophic structural damage to thousands of homes and businesses. Some of these individuals had previously moved to the Baton Rouge area after receiving catastrophic damage during Hurricane Katrina in 2005. In this study, I investigated the role that age group (younger, middle-aged, older) and disaster exposure group (control, single exposure, double exposure) had on post-disaster well-being. …

Cruzando Para El Otro Lado: Motivation, Communication, And The Migrant Experience, Crystal Paul

LSU Doctoral Dissertations

Latino/a migration scholarship has largely focused on the motivations to migrate and the assimilation of men migrants. When gender is considered in migration research, it is often treated as a demographic characteristic used to track differences in trends between men and women migrants rather than as a structuring entity informing the migration experience. Recent feminist scholars have shifted focus, employing gender as a theoretical tool to understand how gender shapes the migrant experience before, during and after migration. My research draws upon this theoretical approach and uses data collected via in-depth interviews in an attempt to understand how gender shapes …

System Identification Based On Errors-In-Variables System Models, Hyundeok Kang

LSU Doctoral Dissertations

We study the identification problem for errors-in-variables (EIV) systems. Such an EIV model assumes that the measurement data at both input and output of the system involve corrupting noises. The least square (LS) algorithm has been widely used in this area. However, it results in biased estimates for the EIV-based system identification. In contrast, the total least squares (TLS) algorithm is unbiased, which is now well-known, and has been effective for estimating the system parameters in the EIV system identification.

In this dissertation, we first show that the TLS algorithm computes the approximate maximum likelihood estimate (MLE) of the system …

High-Performance Computing Frameworks For Large-Scale Genome Assembly, Sayan Goswami

LSU Doctoral Dissertations

Genome sequencing technology has witnessed tremendous progress in terms of throughput and cost per base pair, resulting in an explosion in the size of data. Typical de Bruijn graph-based assembly tools demand a lot of processing power and memory and cannot assemble big datasets unless running on a scaled-up server with terabytes of RAMs or scaled-out cluster with several dozens of nodes. In the first part of this work, we present a distributed next-generation sequence (NGS) assembler called Lazer, that achieves both scalability and memory efficiency by using partitioned de Bruijn graphs. By enhancing the memory-to-disk swapping and reducing the …

Application Of Pressure And Rate Transient Analyses To Stress-Sensitive Multi-Fractured Composite Systems And Compartmentalized Reservoirs, Oscar Mauricio Molina

LSU Doctoral Dissertations

Pressure transient analysis (PTA) is one of the most robust and commonly interpretation tools available for reservoir characterization. Common applications of PTA include estimation of near-wellbore and reservoir properties, detection of reservoir limits and identification of depletion mechanisms. In addition, PTA allows the identification of sealing and leaky faults and the characterization of its properties, such as permeability and transmissibility hence direction of leakage within the fault.

The purpose of this dissertation is to introduce the analytical solution for pressure-transient behavior for three novel reservoir models. First, we develop the analytical model of a multi-fracture horizontal well (MFHW) with pressure-dependent …