Digital Commons Network^™

Eve Leaving The Garden, Norma L. Colby Ms.

LSU Master's Theses

This body of work serves as an investigation into the concepts and burdens that, as a female millennial, impact me regularly. As the door to my education closes, I turn to a much bigger world with endless possibilities and responsibilities. With these overwhelming prospects, I find myself reflecting on how our society has progressed and worsened to arrive here today. I continue to question the passing down of systemic burdens, politics, and gender roles of women in the 21^st century. Eve Leaving the Garden is a collection of textile works, photographs, and sculptures that serve as an exploration of …

Sucrose Demand And Essential Value In Mice With Early-Life Exposure To Risperidone, Megan Federoff

LSU Master's Theses

Second-generation antipsychotics (SGAs), such as risperidone, are widely prescribed to children, but the long-term effects of SGA treatment are not well understood. This study investigated the impact of early-life risperidone treatment on sucrose demand in mice in adulthood. Mice were administered risperidone or vehicle from postnatal day (PND) 33 to 60 and trained in adulthood (>PND 120) to nose poke for a sucrose solution reinforcer. The fixed ratio (FR) value (the number of responses required to produce sucrose delivery; the “price” of sucrose) was varied from 1 to 45, and the resulting consumption versus FR value data were analyzed …

Navigating Political Discussions Online: The Role Safe Spaces Play In Women's Political Participation On Twitter, Ayla Oden

LSU Doctoral Dissertations

This study analyzes how women navigate political discussions online. Social media breeds high-conflict spaces where threats and incivility are more likely to persist. To avoid ad hominem attacks or harassment from online, male users, women may be more likely to use “safe spaces” online, including stereotypically feminine conversations regarding “women’s issues.” The purpose of this study is to analyze how women discuss politics online and whether there are differences in the issues discussed by men and women on Twitter. Using three studies, I examined these differences and their relationship to the threats women face online and their political behavior offline. …

Stakeholder Perceptions About Incorporating Externalities And Vulnerability Into Benefit–Cost Analysis Tools For Watershed Flood Risk Mitigation, Thomas H. Douthat, Fahmida Akhter, Rachelle Sanderson, Jerrod Penn

Faculty Publications

Multi-scalar climate hazards in watersheds and growing consideration regarding equity call for innovation in how agencies evaluate and prioritize mitigation and adaptation projects. Benefit–Cost Analysis (BCA) is one approach that is increasingly being applied to decision-making (i.e., FEMA BCA toolkit), but that has not been applied to watershed and equity-based flood management initiatives. This paper addresses this topic and presents a case study evaluating projects for watershed flood and climate mitigation projects by the Louisiana Watershed Initiative (Louisiana, USA). Through semi-structured interviews with stakeholders and practitioners, we found that BCA tool design must be embedded in the program and policy …

Mathematics Library News, Aaron Lercher

Faculty Publications

Mathematics Library News is an LSU Libraries newsletter for members of the Mathematics and Experimental Statistics Departments, published roughly once each semester.

Tnfα Effects On Adipocytes Are Influenced By The Presence Of Lysine Methyltransferases, G9a (Ehmt2) And Glp (Ehmt1), Ashley A. Able, Allison J. Richard, Jacqueline M. Stephens

Division of Basic Science Faculty Publications

Impaired adipocyte function contributes to systemic metabolic dysregulation, and altered fat mass or function increases the risk of Type 2 diabetes. EHMTs 1 and 2 (euchromatic histone lysine methyltransferases 1 and 2), also known as the G9a-like protein (GLP) and G9a, respectively, catalyze the mono- and di-methylation of histone 3 lysine 9 (H3K9) and also methylate nonhistone substrates; in addition, they can act as transcriptional coactivators independent of their methyltransferase activity. These enzymes are known to contribute to adipocyte development and function, and in vivo data indicate a role for G9a and GLP in metabolic disease states; however, the mechanisms …

Amazonian Birds In More Dynamic Habitats Have Less Population Genetic Structure And Higher Gene Flow, Oscar Johnson, Camila C. Ribas, Alexandre Aleixo, Luciano N. Naka, Michael G. Harvey, Robb T. Brumfield

Faculty Publications

Understanding the factors that govern variation in genetic structure across species is key to the study of speciation and population genetics. Genetic structure has been linked to several aspects of life history, such as foraging strategy, habitat association, migration distance, and dispersal ability, all of which might influence dispersal and gene flow. Comparative studies of population genetic data from species with differing life histories provide opportunities to tease apart the role of dispersal in shaping gene flow and population genetic structure. Here, we examine population genetic data from sets of bird species specialized on a series of Amazonian habitat types …

Networks In Motion: The Alliances Of Information Communication Technologies And Mobility Technologies During The 1918 Influenza Pandemic, Miles C. Coleman, Will Mari

Faculty Publications

In this article, we turn back to the 1918 influenza pandemic to throw light on the alliances of information communication technologies and technologies of mobility (such as the car) during the pandemic. We examine newspaper articles, technical publications, and other historical texts to demonstrate that, despite the fact that mobile technologies—such as cellular phones—did not exist during the 1918 pandemic, the telephone and mobility technology nonetheless formed alliances as networks in motion, or social moments in which risk and reward are calculated not simply by the ability to move, but rather the ability to move, while remaining connected, revealing insight …

Nearly-Lossless-To-Lossy Medical Image Compression By The Optimized Jpegxt And Jpeg Algorithms Through The Anatomical Regions Of Interest, Zhongqiang Li, Alexandra Ramos, Zheng Li, Michelle L. Osborn, Waleed Zaid, Xin Li, Yanping Li, Jian Xu

Faculty Publications

Currently, plenty of image data is generated that complicate storage and image transmission. Great efforts have been attempted on how to increase compression ratio (CR) without loss of critical diagnostic information. In this study, we designed two optimized JPEGXT (JPEGXT_OPT) and JPEG (JPEG_OPT) approaches by amplifying discrete cosine transform coefficients and using the entire anatomical region as ROI (region of interest). We found that ROI percentages have a great impact CR: smaller ROI percentages (10–30 %) could obtain a larger CR. Under the near-lossless compression, JPEGXT_OPT could have CRs up to 4.0 under small ROI percentages (10–30 %), while only …

The State Of Architectural Labor, Ivy Mcclure

Honors Capstones

No abstract provided.

Exploring Young People’S Attitudes Toward Affirmative Consent Policies, Grace Keller

Honors Capstones

No abstract provided.

Improvement Of Existing Stage-Top Incubator For Cell Imaging (Stici), Alyson Goree

Honors Capstones

No abstract provided.

Characterization Of Leptin Receptor Expressing Cells In The Cortex And Hippocampus Of The Mouse Brain, Cade Canepa

Honors Capstones

No abstract provided.

Contemporary Environmental Art: The Multidimensional Relationship Between Black Communities And The American Landscape, Sophia S. Perkins

Honors Capstones

No abstract provided.

Investigating The Role Of The Drosophila Melanogaster Beaf Protein In Mediating Long Distance Chromatin Looping, Oluwatobi Ojemakinde

Honors Capstones

No abstract provided.

When I Think Of Home, Kayla Hall

Honors Capstones

No abstract provided.

The Confederacy’S Last Stand: The Endurance Of Confederate Iconography In Brazil And In The United States, Heather Goss

Honors Capstones

No abstract provided.

Differential Expression Analysis Of Dorsal And Ventral Retinas Of The Four-Eyed Fish Anableps Anableps, Andrea Matus

Honors Capstones

No abstract provided.

Coded Ceramics: Computational Design Of Persian Ceramics, Nasrin Iravani

LSU Doctoral Dissertations

This research explores the use of computer-aided technology and robotics in the creation of digital art and crafts, while also considering the cultural history of digital design. It begins with an examination of the most recognizable styles of Persian ewers made between the years 1,000 and 1,400 AD in the Islamic era. After analyzing a hundred ewers from this period, I classified them based on distinctive features such as openings, necks, bodies, spouts, handles, and bases. Then I designed a series of 3D printed ceramic vessels – titled Coded Ceramics – that were inspired by elements of the historic ewers. …

Symmetric Functions Algebras (Sfa) Ii: Induced Matrices, Philip Feinsilver

Journal of Stochastic Analysis

No abstract provided.

Shape Memory Polymer-Based Multifunctional Syntactic Foams, Siavash Sarrafan

LSU Doctoral Dissertations

With the increase in popularity of shape memory polymers (SMPs), especially in applications such as aerospace, textile, biomedical engineering, and even structures, the weight of the material and the devices made with it has always been a crucial factor. Using the shape memory polymer as a matrix to make a syntactic foam is one of the best and most affordable approaches to creating a lighter material that still has the shape memory effect. The addition of particles of different stiffness, strength, and size, with variable fractions, creates a composite that enables engineering the mechanical, as well as other physical and …

Integrating Germplasm Repositories Into Oyster Aquaculture Systems At The Pathway, Center, And Network Levels, Sarah R. Bodenstein

LSU Doctoral Dissertations

Germplasm repositories offer many potential benefits to commercial farm operations, including preserving genetic resources and increasing production capabilities. Aquaculture industries have yet to take advantage of repository storage despite decades of research evaluating cryopreservation protocols. Eastern oysters (Crassostrea virginica), for example, are a useful research species when addressing this problem. Oysters are an economically important aquaculture species and a high-throughput cryopreservation method for oysters already exists. To address the gap between protocol research and commercial application a different approach is necessary that can analyze the requirements of repository development at multiple organizational levels. The goal of this dissertation was to …

Functional Domains Of The Hsv-1 Ul37 Protein In Virus Infectivity And Retrograde Transport In Neurons, Carolyn Clark

LSU Doctoral Dissertations

Herpes simplex virus type 1 is large alphaherpesvirus with 20 envelope proteins and 23 tegument proteins. Virus entry is via fusion of the viral envelope with cellular membranes mediated by a complex of viral glycoproteins. Glycoprotein B (gB) is the only fusogenic glycoprotein, while other viral glycoproteins and membrane proteins including gD, gH, gL, gK and UL20 membrane protein modulate gB’s fusogenicity. Previously, Our laboratory developed the HSV-1 (VC2) vaccines strain with partial deletions in the amino termini of gK (ΔgK(31–68)) and the UL20 membrane protein (ΔUL20(4–22)). VC2 enters epithelial cells only via endocytosis followed by release of the capsid …

Utilizing A Text-Mining Approach To Investigate Consumers’ Perception Of Secondhand Fashion Consumption: Mass-Market Vs. Luxury Market, H M Rakib Ul Hasan

LSU Doctoral Dissertations

The dissertation aimed to investigate (i) the difference in consumer perception between the mass-market and luxury market of secondhand fashion services, (ii) determine the types of value and strategies that can be adopted into mass-market SHF from luxury SHF business platforms, (iii) investigate the word-of-mouth communication of mass-market SHF consumers, and (iv) investigate the consumer perception of the ‘quality’ and ‘fashionability’ of the mass-market SHF product. Two studies were designed to address the research questions due to the nature of available data. The data were collected from third-party consumer review sites where consumers can review their perception of secondhand fashion …

Stellar Mergers With Hpx-Kokkos And Sycl: Methods Of Using An Asynchronous Many-Task Runtime System With Sycl, Gregor Daiß, Patrick Diehl, Hartmut Kaiser, Dirk Pflüger

Faculty Publications

Ranging from NVIDIA GPUs to AMD GPUs and Intel GPUs: Given the heterogeneity of available accelerator cards within current supercomputers, portability is a key aspect for modern HPC applications. In Octo-Tiger, an astrophysics application simulating binary star systems and stellar mergers, we rely on Kokkos and its various execution spaces for portable compute kernels. In turn, we use HPX, a distributed task-based runtime system, to coordinate kernel launches, CPU tasks, and communication. This combination allows us to have a fine interleaving between portable CPU/GPU computations and communication, enabling scalability on various supercomputers. However, for HPX and Kokkos to work together …

The Reality Of Teaching English Virtually: Esl Teachers' Perspectives And Experiences During The Covid-19 National Pandemic, Natalia Guerrero

LSU Doctoral Dissertations

This study examined the dilemma ESL teachers experienced as the educational system shifted from the usual modus operandi of in-person lessons to the uncharted virtual learning environment (VLE). ESL teachers, in one of the largest urban districts in Louisiana, accumulated additional roles and responsibilities that were unique to the teachers of the English learner (EL) population enrolled at their schools.

Data collected to answer the research questions were the product of single and focus group’s interviews with five ESL elementary and middle school teachers in Freedom District. State and district emergency response to COVID-19 guidelines, along with instructional artifacts, were …

Inverse Machine Learning Discovered Metamaterials With Record High Recovery Stress, Adithya Challapalli, John Konlan, Guoqiang Li

Faculty Publications

Lightweight shape memory polymer (SMP) metamaterials integrated with high strength, high flexibility, and high recovery stress are highly desired in load carrying structures and devices. A grand challenge is that these desired properties have contradictory requirements, for instance between strength and flexibility, and between flexibility and recovery stress. In this study, an inverse design framework using statistical tools and machine learning models is developed to design thin-walled cellular structures with the desired properties. The discovered thin-walled cellular structures are 3D printed using a novel SMP, which exhibited excellent structural properties with record high specific recovery stress. For comparison purpose, lattice …

"Feeling Who I Am": Developing A Theory Of Intersectional Emotional Expression In The Workplace, Terrance Boyd

LSU Doctoral Dissertations

Scholars have studied how employs engage in emotional labor with customers, coworkers, and supervisors in the workplace for over twenty years (Grandey, 2000; Hochschild, 1983; Kim, Bhave, & Glomb, 2013; Thomas, Olien, Allen, Rogelberg, & Kello, 2018). A considerable amount of the emotional labor literature explores the impact of gender in the hypothesized relationships, largely positing that women engage more often in emotional labor and feel the consequences more severely than men (e.g., Scott & Barnes, 2011; Simpson & Stroh, 2004; Ward, McMurray, & Sutcliffe, 2020). Although important and enlightening, this approach is limited in recognizing the more complete spectrum …

Influence Of Metabolic Interventions On Animal Aging And Lifespan, Bhaswati Ghosh

LSU Doctoral Dissertations

Aging is associated with metabolic rewiring. Most lifespan-extending longevity interventions target metabolic pathways. Genetic or pharmacological metabolic approaches that mediate longer lifespan and healthspan, are often linked to detrimental effects on human health. Here, I show that supplementation of botanical extracts from Artemisia scoparia (SCO), dramatically increases animal lifespan. Mechanistically, this lifespan extension is dependent on AMPK-DAF-16 signaling via inhibition of the insulin pathway. In SCO-fed worms, longer lifespan was accompanied by higher fat storage and improved resiliency to age-related physiological stress. Notably, DAF-16, the master regulator of longevity, activated the fatty acid desaturation processes, which promoted the accumulation of …

Optimal Control Problems For Stochastic Processes With Absorbing Regime, Yaacov Kopeliovich

Journal of Stochastic Analysis

No abstract provided.