Dynamical Mean-Field Theory Of The Anderson-Hubbard Model With Local And Nonlocal Disorder In Tensor Formulation, A. Weh, Y. Zhang, A. Östlin, H. Terletska, D. Bauernfeind, K. M. Tam, H. G. Evertz, K. Byczuk, D. Vollhardt, L. Chioncel

Faculty Publications

To explore correlated electrons in the presence of local and nonlocal disorder, the Blackman-Esterling-Berk method for averaging over off-diagonal disorder is implemented into dynamical mean-field theory using tensor notation. The impurity model combining disorder and correlations is solved using the recently developed fork tensor-product state solver, which allows one to calculate the single particle spectral functions on the real-frequency axis. In the absence of off-diagonal hopping, we establish exact bounds of the spectral function of the noninteracting Bethe lattice with coordination number . In the presence of interaction, the Mott insulating paramagnetic phase of the one-band Hubbard model is computed …

The Influence Of Pine Management On Grassland-Nesting Songbirds Wintering In The Southeastern United States, Nancy M. Raginski

LSU Master's Theses

In the southeastern U.S., pine forests cover ~28 million ha and are most often used for commercial timber and hunting. Management practices used to reach desired vegetative conditions in these forests may simultaneously influence distributions of overwintering songbirds, including several grassland-nesting songbirds. From December to February of 2018 and 2019 and December of 2020, I surveyed longleaf (Pinus palustris) and loblolly pine (P. taeda) stands burned 0–7 years ago to examine the influence of pine management on grassland-nesting birds overwintering in central Louisiana. I used single-season occupancy and N-mixture models to examine occupancy and abundance of …

The Rougarou Concerto And Initial Observations Of The Flex Ensemble, Thomas Wilson

LSU Doctoral Dissertations

The purpose of this dissertation is to examine the immediate impact of the coronavirus pandemic through a composer’s lens. It will examine the impact through a variety of means, considerably: interviews of those with first-hand experiences, analyses of prominent adaptable works, and self-analysis of how my own process adapted to meet the moment.

After discovering the Composers Repertoire Initiative and being commissioned to write a concerto by Eduard Teregulov, I wrote a cello concert. The central chapter features the Rougarou Concerto, a cello concerto with accompanying flex ensemble, written for Eduard Teregulov. The work was written over ten months …

The Use Of Problem Solving Skills Training To Treat Disruptive Behavior In Schools, Emma Larson

LSU Doctoral Dissertations

Disruptive behaviors in children are a class of behaviors that involve problems with impulse control, regulating emotions, compliance, aggression, and respecting the rights of others or societal norms (American Psychiatric Association, 2013; Nelson, 1996). The presence of these disruptive behaviors take a negative toll on the environment including the education setting, criminal justice system, public health services, and families (Tolan and Leventhal, 2013; Cuffel, 1997). Meta-analyses have shown several evidence-based treatments for disruptive behavior with cognitive-behavioral therapy being an effective approach (Eyeberg, Nelson, & Boggs, 2008; McCart & Sheidow, 2016). One such cognitive-behavioral therapy that is effective for decreasing disruptive …

Love, Yourself: A Solo Play, Tiffany Gilly

LSU Master's Theses

This Thesis outlines the research, writing, and production process that lead up to the performance of an original Solo Play, presented by the author. The project, entitled Love, Yourself is a twenty-minute autobiographical journey about the author’s experiences as a child of a neglectful and abusive single mother, as a foster kid, then college student, and eventual aspiring performer. In the play, the author deals with writer's block from not having felt inspired to write a song in months and attempts to find inspiration by sifting through old memories and telling stories to the audience. By the end of the …

Characterization Of Resistance To Two Crambid Stem Borers Among Louisiana Sugarcane Cultivars, Leonardo D. Salgado

LSU Master's Theses

Cultivar resistance is a key management strategy for the stem borer complex (Lepidoptera: Crambidae) in Louisiana sugarcane, but mechanisms of resistance are not well understood. This research evaluated the potential mechanisms of cultivar resistance to Diatraea saccharalis and Eoreuma loftini among commercial sugarcane cultivars and experimental clones through a series of field screenings, greenhouse trials, and diet incorporation assays. The stem borer resistant standard HoCP 85-845 and cultivar L 01-299 were among the cultivars with the lowest borer injury levels in both field and greenhouse trials. Cultivars HoCP 00-950, L 12-201, and HoCP 14-885 were among the most heavily injured …

Modeling Of Island Block Scatter For Intensity Modulated Bolus Electron Conformal Therapy, Joseph G. Scotto

LSU Master's Theses

Purpose: Bolus electron conformal therapy (BECT) benefits treatment of the post-mastectomy chest wall, head and neck, paraspinal muscles, and extremities. Patient dose heterogeneities caused by bolus can be reduced through intensity modulation (IM) across the incident electron beam. This requires passive radiotherapy intensity modulation for electrons (PRIME) devices, which utilize tungsten pins (island blocks) imbedded in machinable foam. IM-BECT treatment planning requires accurate dose calculation using the pencil beam redefinition dose algorithm (PBRA). Currently, the PBRA models island blocks as perfect collimators. This work explores models to account for electrons scattering into and out of the sides of island blocks. …

The Relationship Between Emotion Regulation And Substance Use Treatment Attrition, Melanie Ruth Roys

LSU Doctoral Dissertations

Severe substance use disorders are characterized by chronic cycles of relapse; however, individuals who complete substance use treatment are less likely to experience relapse. Research has focused on trying to identify factors that predict treatment dropout to help improve treatment outcomes. Most of this research has focused on examining demographic and patient-specific factors, with little success in reliably predicting treatment attrition. There has been less focus on investigating transdiagnostic factors that span across discrete psychological diagnoses and demographics. The present study sought to determine if self-report and behavioral measures related to emotion regulation predicted inpatient substance use treatment dropout above …

The Innocence Of Lennie Small In Carlisle Floyd's Opera Of Mice And Men In Excerpts Presented As A Performer's Guide, Michael Robert Hendrick

LSU Doctoral Dissertations

Of Mice and Men is a 20th century American opera composed by Carlisle Floyd. Carlisle Floyd also served as librettist, as he did with all of his operas. Based on the American novel of the same name by John Steinbeck, Of Mice and Men is Carlisle Floyd's second most performed opera. This project serves to demonstrate the innocence of the role of Lennie Small, as seen through his intellectual shortcomings, enhanced by the vocal line and music of the composer. A performer's guide is also provided.

Variações Sérias Sobre Um Tema De Anacleto De Medeiros - Piano A Quatro Mãos, By Ronaldo Miranda: A Performer’S Guide, Patricia Bretas De O Da Rosa

LSU Doctoral Dissertations

Abstract

This study examines Ronaldo Miranda’s Variações Sérias Sobre um Tema de Anacleto de Medeiros – Piano a Quatro Mãos, 1998, transcribed from the original, which was composed for wind quintet (1991). The piano duet version is well-known and part of the core repertoire of most Brazilian piano duos.

Enhanced by the interview with the composer, the paper starts by addressing the relevant facts of his rich and prolific musical life while tracing four compositional phases through a list of his piano works.

A brief history of the Serious Variations (so named in this paper) deals with its genesis, characteristics, …

Potential Role Of Acetylation On Equine Sperm Capacitation, Luis H. De Aguiar

LSU Master's Theses

A series of biochemical and physical modifications in the sperm during the transport in the female reproductive tract that make the sperm capable of fertilization are called capacitation. It is an important process since ejaculated sperm is not capable of fertilizing an oocyte before capacitation. The sperm modifications during the capacitation process include changes in membrane fluidity, tyrosine phosphorylation, calcium influx, pH increase and hyperpolarization, leading the sperm to achieve hypermotility and the acrosome reaction, which are also required for conventional in vitrofertilization (IVF). In vitro production of embryos leading to viable offspring has been successful in different …

Isolation Of Foliar Fungi From Roseau Cane (Phragmites Australis) In Coastal Louisiana, David M. Galo Espinal

LSU Master's Theses

Roseau cane (Phragmites australis) is a wild plant with an extensive root system that is useful in areas vulnerable to soil erosion. In Louisiana, this plant plays an important role protecting the coastal infrastructure of the lower Mississippi River delta (MRD). Currently, P. australis growing in the MRD is being affected by a die-off, which has been associated with several biotic and abiotic factors.

Plant pathogenic fungi is a biotic factor that negatively affect plant growth. Therefore, foliar fungi were isolated from plants growing in one die-off affected area (MRD) and two non-affected areas (Pecan Island and Manchac) …

Impact Of An Emergent Reading Skills Intervention On Letter Recognition And Phoneme Identification In Pre-Kindergarten Children, Laura K. Simmons

LSU Master's Theses

Research in the field of early literacy has demonstrated that letter recognition and phoneme identification are two necessary components of emergent reading skills (Casbergue & Strickland, 2016). Emergent literacy refers to the reading and writing skills that young children develop prior to learning traditional literacy skills and has been linked to increased literacy achievement (Justice & Pullen, 2003). This study focused solely on emergent reading skills. The purpose of the present study was to determine the effects of a targeted multi-sensory intervention on the emergent reading skills of letter recognition and phoneme identification using a multiple baseline design (Kazdin, 2011). …

Structural Vibration Control Of Offshore Wind Turbines, Vahid Jahangiri

LSU Doctoral Dissertations

Offshore wind turbines (OWTs) are becoming more attractive than their onshore counterparts due to advantages such as high wind speed, less visual impact and less noise constraints in the marine area. However, the combined wind, wave and seismic loading and other environmental effects render the offshore wind turbines suffering from excessive vibration which adversely influences the system performance and structural integrity. In this regard, the present dissertation aims to develop effective structural control techniques to mitigate three-dimensional structural vibrations of offshore wind turbines. Analytical models of a fixed-bottom and floating offshore wind turbine are established using Euler-Lagrangian equation wherein the …

Performance Evaluation Of Gas Lift Valves Using Numerical Simulation, Felipe Simoes Maciel

LSU Master's Theses

This work aimed to assess the performance of two numerical simulation methods to replicate flow capacity test (FCT) results and predict the flow coefficient (Cv) and critical pressure ratio (Rcp) of gas lift valves (GLVs). FCT's use a modified GLV with an adjustable stem positioning system to obtain pressure as a function of flow rate for different stem positions to calculate Cv and Rcp. Therefore, this study used both a one-dimensional (1D) mechanistic model and computational fluid dynamics (CFD) to predict the same variable from the FCT without tests using modified GLVs. This methodology demonstrates accurate results, which were compared …

Effects Of Beach Nourishment Project On Coastal Geomorphology And Mangrove Dynamics In Southern Louisiana, Usa, Marcelo Cancela Lisboa Cohen, Adriana Vivan De Souza, Kam-Biu Liu, Erika Rodrigues, Qiang Yao, Luiz Carlos Ruiz Pessenda, Dilce Rossetti, Junghyung Ryu, Marianne Dietz

Faculty Publications

No abstract provided.

Fisheries Food Webs: Quantifying Habitat-Use, Trophic Structure, And Energetic Pathways In Coastal Tanzania, Mario Fernando Hernandez

LSU Doctoral Dissertations

Commercial and recreational fisheries are a valuable resource to millions of people around the world. Developing countries are particularly dependent on the revenue provided by locally harvested fish with total exports from these nations valued at $80 billion USD. For Tanzania, fisheries provide not only a source of revenue but an important source of protein with an estimated 25 to 30kg of fish consumed per person every year. There is no doubt that high fisheries production is critical to the well-being of millions of livelihoods along the Tanzanian coast. An important but poorly understood driver of fisheries production is the …

Environmental Perception In Colombia's Páramo Protected Areas, Juliana Delgado

LSU Master's Theses

This thesis analyzes the gap between farmers' environmental perceptions in Téquita, a small village in Colombia, and the definition of protected areas has led to a conflict for the use of natural resources. I examine if the protected area's policies have dealt with the social and ecological issues in the páramos and recognized the social construction of the landscape, farmers' identities, and their interpretations about work and land. The case study focuses on Güina High Mountain in the Guantiva-La Rusia páramo complex, which recently the Colombian government declared as a protected area. In light of anthropologist Tim Ingold's meaning of …

“Jeszcze Polska Nie Zginęła”: Discovering The Life And Music Of Zygmunt Noskowski, Filip Starostka

LSU Doctoral Dissertations

Polish music history suffers from a lack of representation. This misleads audiences to the common misconception that Polish music began and ended with Chopin. In reality, there are a number of important figures in 19^th-century Poland whose efforts were seen as vital to the restoration of music culture in a time when conquering nations were actively working on destroying Poland’s history. The purpose of this lecture recital is to bring the biography and works of Zygmunt Noskowski, one of Warsaw’s most important musical figures, to English speaking audiences.

Born in 1846, Zygmunt Noskowski was active as a musician, …

Memory Reduction Using A Ring Abstraction Over Gpu Rdma For Distributed Quantum Monte Carlo Solver, Weile Wei, Eduardo D'Azevedo, Kevin Huck, Arghya Chatterjee, Oscar Hernandez, Hartmut Kaiser

Faculty Publications

Scientific applications that run on leadership computing facilities often face the challenge of being unable to fit leading science cases onto accelerator devices due to memory constraints (memory-bound applications). In this work, the authors studied one such US Department of Energy mission-critical condensed matter physics application, Dynamical Cluster Approximation (DCA++), and this paper discusses how device memory-bound challenges were successfully reduced by proposing an effective "all-to-all"communication method - -a ring communication algorithm. This implementation takes advantage of acceleration on GPUs and remote direct memory access (RDMA) for fast data exchange between GPUs. Additionally, the ring algorithm was optimized with sub-ring …

Numerical And Field Study Of Tidal And Subtidal Dynamics In A Bar-Built Estuary: Barataria Bay, Gulf Of Mexico, Ali Reza Payandeh

LSU Doctoral Dissertations

This study investigated tidal and subtidal dynamics of water level, currents, and suspended sediment concentration (SSC) in Barataria Bay, a shallow bar-built estuary of the Northern Gulf of Mexico. First, the local and remote wind forcing contribution on subtidal water level and current variability were examined using three different methods: (i) statistical analysis of observed data, (ii) an analytical model and (iii) a 2-D barotropic numerical model. Results suggested that the remote and local wind effects were equally important at the bay mouth, however local winds were the dominant forcing driver inside the bay. The amplitudes of subtidal fluctuations induced …

Habitat Use And Morphology Of Birds In "Intact" Amazonia Under Changing Climate, Vitek Jirinec

LSU Doctoral Dissertations

Neotropical forests contain the core of global avian diversity. Of these, the Amazon rainforest is the largest, but ~20% has already been lost to deforestation, inspiring research into the effects of clearing and fragmentation on forest birds. These studies have consistently shown that insectivorous birds that forage on or near the ground are the most sensitive species to forest disturbance. As a preamble to our study, we synthesized bird capture data collected over 40 years within continuous forest far from human disturbance. Remarkably, we found that terrestrial and near-ground insectivores have shown substantial abundance declines even within primary forest. The …

Development And Initial Psychometric Properties Of The Cannabidiol Outcome Expectancies Questionnaire (Cbd-Oeq), Katherine Walukevich-Dienst

LSU Doctoral Dissertations

In the United States, a growing number of adults are using products containing cannabidiol (CBD), a non-psychoactive cannabinoid marketed as a treatment for a large number of medical and mental health conditions, despite limited support for the efficacy of CBD for these conditions. Identification of CBD-related outcome expectancies (i.e., beliefs concerning the anticipated effects of using CBD) could be useful in understanding the etiology and maintenance of CBD use. Although there are several measures of cannabis outcome expectancies, no known CBD-specific outcome expectancy measure exists. The current study used a three phase, mixed methods approach to develop and test the …

Do Neighbours Matter? The Effect Of Single‐ And Mixed‐Species Sowing Density On Seed Germination Of Annual Wetland Plants, Francielli Bao, Davi Rodrigo Rossatto, Arnildo Pott, Tracy Elsey‐Quirk, Marco Antonio Assis, Rafael Arruda, Desirée Marques Ramos, Borja Jiménez‐Alfaro

Faculty Publications

No abstract provided.

Northeast- Summer 2021, Lsu Agcenter

Horticulture Hints

No abstract provided.

Northwest- Summer 2021, Lsu Agcenter

Horticulture Hints

No abstract provided.

Central- Summer 2021, Lsu Agcenter

Horticulture Hints

No abstract provided.

Southwest- Summer 2021, Lsu Agcenter

Horticulture Hints

No abstract provided.

Southeast- Summer 2021, Lsu Agcenter

Horticulture Hints

No abstract provided.

Phylogenomic Analyses Reveal Non-Monophyly Of The Antbird Genera Herpsilochmus And Sakesphorus (Thamnophilidae), With Description Of A New Genus For Herpsilochmus Sellowi, G A. Bravo, B M. Whitney, R Belmonte-Lopes, M R. Bornschein, G A. Bravo, R Beco, J Battilana, L N. Naka, A Aleixo, M R. Pie, L F. Silveira, E P. Derryberry, R T. Brumfield

Faculty Publications

The family Thamnophilidae is a species-rich Neotropical radiation of passerine birds. Current classification of its 235 species is mostly based on morphological similarities, but recent studies integrating comprehensive phenotypic and phylogenetic data have redefined taxonomic limits of several taxa. Here, we assess generic relationships of Herpsilochmus, Sakesphorus, Thamnophilus, Biatas, and Dysithamnus using DNA sequences from the mitochondrion, nuclear exons, and ultraconserved elements, with further attention to interspecific relationships within Herpsilochmus. We show that Herpsilochmus and Sakesphorus are not monophyletic. We resolve Herpsilochmus sellowi as a deep-branch sister to the monotypic genus Biatas and Sakesphorus cristatus as sister to a clade …