Digital Commons Network^™

Solopreneur Digital Ecosystems: Genesis, Lineage And Preliminary Categorization, Gabriele Piccoli, Biagio Palese, Joaquin Rodriguez

Faculty Publications

This paper traces the genesis and lineage of solopreneur digital ecosystems. These ecosystems, fostered by a digital environment that is infrastructural, combinatorial and servitized, are enabling the rise to prominence of the solopreneur. We theorize solopreneur digital ecosystems as the latest incarnation of systems beyond firm control, with digital platforms and digital marketplaces as their principal enablers. In an effort to compare them from the perspective of the solopreneur, we categorize solopreneur digital ecosystems on three dimensions: algorithmic control, commoditization, and lock-in. Our work contributes a framework that solopreneurs can use to identify ecosystems in which they can optimally invest …

Tripbam: Creating Digital Value During The Covid-19 Pandemic, Gabriele Piccoli, Federico Pigni, Barbara Wixom, Joaquin Rodriguez

Faculty Publications

TRIPBAM pioneered automated clustered rate monitoring in the hotel industry. As the technology startup prepared for a successful exit that would reward founders, employees, and investors for their success, the coronavirus disease of 2019 (COVID-19) pandemic hit. The case chronicles TRIPBAM’s leadership’s fast reaction and discusses the strategic initiatives the firm put in place to set itself up for a return to growth after the crisis.

Peridynamics For Quasistatic Fracture Modeling, Debdeep Bhattacharya, Patrick Diehl, Robert P. Lipton

Faculty Publications

Fracture involves interaction across large and small length scales. With the application of enough stress or strain to a brittle material, atomistic scale bonds will break, leading to fracture of the macroscopic specimen. From the perspective of mechanics fracture should appear as an emergent phenomena generated by a continuum field theory eliminating the need for a supplemental kinetic relation describing crack growth. We develop a new fast method for modeling quasi-static fracture using peridynamics. We apply fixed point theory and model stable crack evolution for hard and soft loading. For soft loading we recover unstable fracture. For hard loading we …

Louisiana Survey 2021, Lsu Reilly Center For Media & Public Affairs

Reilly Center Louisiana Surveys

The 2021 Louisiana Survey is the nineteenth in an annual series sponsored by the Reilly Center for Media & Public Affairs at Louisiana State University’s Manship School of Mass Communication.

The mission of the Louisiana Survey is to establish benchmarks as well as to capture change in residents’ assessments of state government services. The survey is further dedicated to tracking public opinion on the contemporary policy issues that face the state. Each iteration of the Louisiana Survey contains core items designed to serve as barometers of public sentiment, including assessments of whether the state is heading in the right direction …

Fear Of Zika: Information Seeking As Cause And Consequence, James Price Dillard, Ruobing Li, Chun Yang

Faculty Publications

This study examined the relationship between information seeking and fear during the Zika-induced global health crisis. A longitudinal survey of women in the Southern U.S. (N = 306) was conducted in 2016, beginning just days after the World Health Organization declared Zika a global crisis. The data showed that time 1 fear stimulated information seeking at time 2 and that time 2 information seeking caused fear at time 3. This pattern held regardless of whether participants were pregnant or planning to become pregnant (high personal relevance) versus neither (low personal relevance). The findings are at odds with most theories of …

Editorial: Investigating Black Activism In The Civil War Era, Jeffery Hardin Hobson

Civil War Book Review

This special thematic issue of the Civil War Book Review is dedicated to recent works that uncover, reveal, and recast the history of Black Americans’ emancipation activism in the Civil War Era. The concept of emancipation carried myriad meanings among nineteenth-century Black Americans, which the scholarship reviewed below reflects. These authors have catalogued nineteenth-century Black Americans’ vibrant and dynamic efforts to emancipate themselves from slavery, to achieve citizenship and its attendant rights, to secure personal safety, to gain social standing, and to attain economic stability. These books emphasize nineteenth-century African Americans possessed a complex political consciousness that was finely tuned …

Interview: Organizing Freedom: Black Emancipation Activism In The Civil War Midwest, Jennifer Harbour

Civil War Book Review

CWBR interview with Dr. Jennifer Harbour, associate professor of Black Studies and Women's and Gender Studies at the University of Nebraska, Omaha, and author of Organizing Freedom: Black Emancipation Activism in the Civil War Midwest, which was published by the Southern Illinois University Press in 2020.

Until Justice Be Done: America’S First Civil Rights Movement, From The Revolution To Reconstruction, Ben Davidson

Civil War Book Review

Masur contends historians have overlooked a decades’-long, Black-led civil rights movement that flourished in the nineteenth century. "Until Justice Be Done is necessary reading for any scholar of U.S. history,” and is a book that should "receive a wide readership beyond academia,” as Masur’s “non-polemical” examination of citizenship rights “may well challenge those of various political stripes to reexamine their idea and strategies for honoring, changing, or using the Constitution.”

A Glorious Liberty: Frederick Douglass And The Fight For An Antislavery Constitution, Leigh Fought

Civil War Book Review

"Root . . . appears more interested in proving that the U.S. Constitution, if interpreted correctly, was not a document that would permit racism, especially once abolitionists had prevailed with the Thirteenth, Fourteenth, and Fifteenth Amendments. The narrative has very little to say about Frederick Douglass, following the highlights of pro- or anti-slavery moments in relation to the Constitution more than the ebb and flow of Douglass’s ideas. Douglass appears less as a man with complex thinking processes that developed over time and in response to multiple factors than as an icon supplying optimistic quotes about the Constitution as a …

Editorial, Jeffery Hardin Hobson

Civil War Book Review

"This issue of the Civil War Book Review is cohered around the often-intersecting phenomena of domesticity and religion in the Civil War era. Although historians have abandoned the notion that the nineteenth-century domestic sphere was hermetically cordoned from the public, the books reviewed herein demonstrate that studying the home as a distinct space remains an enlightening endeavor, even as the featured authors expand our understanding of what constituted the domestic sphere. The books reviewed in this issue also reinforce our understanding of religion’s significance to nineteenth-century Americans’ lives and identities. The authors further elucidate the ways in which Christianity helped …

A Holy Baptism Of Fire & Blood: The Bible And The American Civil War, Bruce T. Gourley

Civil War Book Review

"All told—and there is much in James Byrd’s insightful narrative—A Holy Baptism of Fire & Blood is a unique and powerful first-hand recounting of the Civil War’s ebb and flow through the elastic prism of the book most familiar to nineteenth-century Americans."

Effects Of Dilution And Pressure On Combustion Characteristics Within Externally Heated Micro-Tubes, Seyed Navid Roohani Isfahani, Vinicius M. Sauer, Ingmar Schoegl

Faculty Publications

This study investigates the impact of pressure and dilution on combustion behavior of C2H6/air/N2 mixtures within an externally heated micro-tube using both experimental and analytical techniques. Experiments are conducted for pressures up to 10 bar at multiple dilution levels and document three flame regimes, i.e. weak flames, FREI and normal flames. Characteristic temperatures for flame stabilization, as well as ignition and extinction are obtained by applying a novel thin filament pyrometry method (TFP), which uses a thin silicon carbide (SiC) filament that enables temperature measurements for both reacting and non-reacting cases. Results show a decrease of characteristic temperatures with increasing …

Marine Vehicles Localization Using Grid Cells For Path Integration, Ignacio Carlucho, Manuel F. Bailey, Mariano De Paula, Corina Barbalata

Faculty Publications

Autonomous Underwater Vehicles (AUVs) are platforms used for research and exploration of marine environments. However, these types of vehicles face many challenges that hinder their widespread use in the industry. One of the main limitations is obtaining accurate position estimation, due to the lack of GPS signal underwater. This estimation is usually done with Kalman filters. However, new developments in the neuroscience field have shed light on the mechanisms by which mammals are able to obtain a reliable estimation of their current position based on external and internal motion cues. A new type of neuron, called Grid cells, has been …

Mass Spectrometric Calibration Procedure For Real-Time Detection Of Lighter Hydrocarbons, M F. Mbaegbu, P L. Adhikari, I Gupta, M Rowe

Faculty Publications

Determining gas compositions from live well fluids on a drilling rig is critical for real time formation evaluation. Development and utilization of a reliable mass spectrometric method to accurately characterize these live well fluids are always challenging due to lack of a robust and effectively selective instrument and procedure. The methods currently utilized need better calibration for the characterization of light hydrocarbons (C-1-C-6) at lower concentrations. The primary goal of this research is to develop and optimize a powerful and reliable analytical method to characterize live well fluid using a quadruple mass spectrometer (MS). The mass spectrometers currently being used …

An Open-Source Code For Fluid Flow Simulations In Unconventional Fractured Reservoirs, B Wang, C Fidelibus

Faculty Publications

In this article, an open-source code for the simulation of fluid flow, including adsorption, transport, and indirect hydromechanical coupling in unconventional fractured reservoirs is described. The code leverages cutting-edge numerical modeling capabilities like automatic differentiation, stochastic fracture modeling, multicontinuum modeling, and discrete fracture models. In the fluid mass balance equation, specific physical mechanisms, unique to organic-rich source rocks, are included, like an adsorption isotherm, a dynamic permeability-correction function, and an Embedded Discrete Fracture Model (EDFM) with fracture-to-well connectivity. The code is validated against an industrial simulator and applied for a study of the performance of the Barnett shale reservoir, where …

Primordial Scalar Power Spectrum From The Hybrid Approach In Loop Cosmologies, Bao Fei Li, Javier Olmedo, Parampreet Singh, Anzhong Wang

Faculty Publications

We compare the primordial scalar power spectra in the loop cosmological models using the effective dynamics of the hybrid approach to cosmological perturbations in which the background is loop quantized, but the perturbations are Fock quantized. The three loop cosmological models under consideration are the standard loop quantum cosmology (LQC), the modified LQC-I (mLQC-I) and the modified LQC-II (mLQC-II) in the spatially flat Friedmann-Lemaître-Robertson-Walker universe with a Starobinsky potential. These models arise from different regularizations of the classical Hamiltonian constraint in the symmetry reduced spacetimes and aim to capture certain features of quantization in loop quantum gravity. When applying the …

Identification Of Blda As A Major Regulator Of Virulence In The Sweetpotato Soil Rot Pathogen Streptomyces Ipomoeae And Characterization Of Distinct Clostridium Sweetpotato Soft Rot Isolates, Kuei-Ting Yang

LSU Doctoral Dissertations

Streptomyces ipomoeae is the causative agent of Streptomyces soil rot on sweetpotato, a disease characterized by extensive necrosis of both adventitious and storage roots. While Streptomyces potato scab pathogens produce a phytotoxin (thaxtomin A), which is induced in the presence of cellobiose and suberin, S. ipomoeae produces a less-modified, phytotoxin (thaxtomin C), whose inducer has not been identified. To investigate transcriptional regulation of thaxtomin C production, we inserted a promoter involved in thaxtomin C synthesis upstream of the gusA reporter in an S. ipomoeae strain. Reporter gene expression was significantly upregulated in the presence of size-fractionated sweetpotato extract (SPE). The …

Student Perceptions Of Rules For Classroom Interaction, Hanson Paul Leblanc Iii

LSU Master's Theses

ABSTRACT

Burgoon’s expectancy violation model posits that nonverbal rule violations will be evaluated according to the perceptions toward the violator and the behavior itself. However, the violator may have perceptions regarding the appropriateness of the rule. This study measured the perceptions of high school students regarding the rules for classroom interaction. It is believed that the rules for classroom interaction are rules which have been learned through the process of socialization and enculturation into the classroom setting throughout students’ careers. These rules should be well known by all students by the time they reach tenth grade, the grade being investigated. …

Martingales And Cocycles In Quantum Probability, Kalyan B. Sinha

Journal of Stochastic Analysis

No abstract provided.

Camkiiα-Positive Interneurons Identified Via A Microrna-Based Viral Gene Targeting Strategy, Marianna K. Keaveney, Bahar Rahsepar, Hua-An Tseng, Fernando R. Fernandez, Rebecca A. Mount, Tina Ta, John A. White, Jim Berg, Xue Han

Faculty Publications

No abstract provided.

The Yang-Mills Heat Equation On Three-Manifolds With Boundary, Nelia Charalambous

Journal of Stochastic Analysis

No abstract provided.

Mixed Messages: Reading Contemporary U.S. Literature Of Biracial Girlhood, Candice Nicole Hale

LSU Doctoral Dissertations

The tragic mulatta character is no longer an accurate representation of biracial female characters in literature. This dissertation considers the vast history of the tragic mulatto genre and its tragic and mired representations of biracial women and how they are often portrayed in literature. Within a historical, legal, and political analysis, I highlight the ways perceptions, attitudes, and representations about biracial individuals have changed, so those same shifts should change in the literature. Because of the bourgeoning field of Critical Mixed Race Studies (CMRS), both scholars and authors are recasting and rewriting the narratives and discourses of mixed-race in the …

Yap/Taz Deficiency Reprograms Macrophage Phenotype And Improves Infarct Healing And Cardiac Function After Myocardial Infarction, Masum M. Mia, Dasan Mary Cibi, Siti Aishah Binte Abdul Ghani, Weihua Song, Nicole Tee, Sujoy Ghosh, Junhao Mao, Eric N. Olson, Manvendra K. Singh

Division of Basic Science Faculty Publications

Adverse cardiac remodeling after myocardial infarction (MI) causes structural and functional changes in the heart leading to heart failure. The initial post-MI pro-inflammatory response followed by reparative or anti-inflammatory response is essential for minimizing the myocardial damage, healing, and scar formation. Bone marrow-derived macrophages (BMDMs) are recruited to the injured myocardium and are essential for cardiac repair as they can adopt both pro-inflammatory or reparative phenotypes to modulate inflammatory and reparative responses, respectively. Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) are the key mediators of the Hippo signaling pathway and are essential for cardiac regeneration and repair. …

Genetic Variation In Lean Body Mass, Changes Of Appetite And Weight Loss In Response To Diet Interventions: The Pounds Lost Trial, Xiang Li, Tao Zhou, Hao Ma, Yoriko Heianza, Catherine M. Champagne, Donald A. Williamson, George A. Bray, Frank M. Sacks, Lu Qi

Population and Public Health Science Faculty Publications

Aim: To investigate whether the genetic risk score (GRS) for lean body mass (LBM) modified the effects of weight-loss diets on changes in appetite and adiposity among overweight and obese individuals. Participants and Methods: In the 2-year Preventing Overweight Using Novel Dietary Strategies (POUNDS Lost) trial, we included 692 adults who were randomly assigned to one of four diets varying in macronutrient intake. A GRS was calculated using five single nucleotide polymorphisms associated with LBM. Results: The LBM-GRS was not associated with the baseline LBM measured by dual-energy x-ray absorptiometry in a subgroup (50%) of the study population. We found …

Sleep Extension: A Potential Target For Obesity Treatment, Kristin K. Hoddy, Kaitlin S. Potts, Lydia A. Bazzano, John P. Kirwan

Division of Basic Science Faculty Publications

Purpose of Review: Sleep and obesity share a bidirectional relationship, and weight loss has been shown to enhance sleep. Aiming to extend sleep on its own or as part of a lifestyle intervention may attenuate health consequences of short sleep. This review highlights several sleep extension approaches, discusses feasibility of each, and summarizes findings relevant to obesity. Recent Findings: Sleep extension in response to experimental sleep restriction demonstrates partial rescue of cardiometabolic dysfunction in some but not all studies. Adequate sleep on a nightly basis may be necessary for optimal health. While initial sleep extension interventions in habitually short sleepers …

A Telescope Gwas Analysis Strategy, Based On Snps-Genes-Pathways Ensamble And On Multivariate Algorithms, To Characterize Late Onset Alzheimer’S Disease, Margherita Squillario, Giulia Abate, Federico Tomasi, Veronica Tozzo, Annalisa Barla, Daniela Uberti, Michael W. Weiner, Paul Aisen, Ronald Petersen, Jack R. Clifford, William Jagust, John Q. Trojanowki, Arthur W. Toga, Laurel Beckett, Robert C. Green, Andrew J. Saykin, John Morris, Leslie M. Shaw, Zaven Khachaturian, Greg Sorensen, Maria Carrillo, Lew Kuller, Marc Raichle, Steven Paul, Peter Davies, Howard Fillit, Franz Hefti, Davie Holtzman, M. Marcel Mesulam, William Potter, Peter Snyder, Tom Montine, Ronald G. Thomas, Michael Donohue

Clinical Research Faculty Publications

Genome–wide association studies (GWAS) have revealed a plethora of putative susceptibility genes for Alzheimer’s disease (AD), with the sole exception of APOE gene unequivocally validated in independent study. Considering that the etiology of complex diseases like AD could depend on functional multiple genes interaction network, here we proposed an alternative GWAS analysis strategy based on (i) multivariate methods and on a (ii) telescope approach, in order to guarantee the identification of correlated variables, and reveal their connections at three biological connected levels. Specifically as multivariate methods, we employed two machine learning algorithms and a genetic association test and we considered …

Development Of A Self-Powered Weigh-In-Motion System, Athanassios Papagiannakis, Sarah Ahmed, Samer Dessouky, Reza Khalili, Gopal Vishwakarma

Publications

This report describes the development of a novel weigh-in-motion (WIM) system that utilizes piezoelectric elements for sensing load and powering an ultra-low power microcontroller unit (MCU) that serves as its data acquisition system. A system of 4 piezoelectric (PZT) stacks serves as the energy harvester, while load sensing is done via a set of 4 PZT elements connected in parallel. Two alternative MCUs were considered, with various data handling capabilities and power consumption requirements. These MCUs have very short “wake-up” times allowing vehicle sensing without the need for inductive loops commonly used in conventional WIM systems. Special electric circuits were …

Fluid-Driven Fracture Initiation From Oil And Gas Wells Considering Lifetime Stresses, Andreas Michael

LSU Doctoral Dissertations

Fluid-driven fracture initiation from oil and gas wells is examined in detail. The dissertation covers three subtopics: drilling, completion (stimulations), and post-blowout capping-induced fracture initiation.

Drilling-induced tensile fractures (DITFs) are located in an azimuth orthogonal to wellbore breakouts and are observed from image logs obtained during drilling operations. Fully analytical criteria for the orientation of DITFs initiating from wells in porous, permeable media are derived considering fluid infiltration from a pressurized wellbore. DITF orientation (longitudinal or transverse-to-the-wellbore) is used to constrain the magnitude of the local maximum horizontal principal stress. The range of the possible stress states is indicated on …

Molecular Mechanisms Of Boron Toxicity Tolerance In Plants, Guannan Wang

LSU Doctoral Dissertations

Boron toxicity is a worldwide agricultural problem that limits crop productivity and quality. However, our understanding on the genetic responses and adaption mechanisms to boron toxicity in plants is very limited. To address this gap in our knowledge, I compared boron stress-sensitive model, Arabidopsis thaliana and its stress-adapted relative Schrenkiella parvula to study how plants respond and adapt to excess boron at physiological, genomic, transcriptomic, and metabolic levels.

The overall project goal involved integration of multi-omics datasets to develop genome to phenome interpretations. To achieve this, I developed a python package, GOMCL, to facilitate the extraction of biologically meaningful information …

Crisis, Crisis, Read All About It! Investigating The Direct And Joint Effects Of Crisis Response Strategies, Crisis History And Strategic Actions On The Tone Of Media Coverage, Habiba Nefisa Alambo

LSU Doctoral Dissertations

Crisis management research has focused on how crisis stricken firms protect their reputation by communicating appropriate messages to evaluators and employing strategic actions that favorably shape public opinion about the stricken firm. Developing conversations have addressed how a firm’s crisis history may impact current crisis management efforts. However, little is known about how these factors jointly and directly influence what is said about a crisis stricken firm and subsequently impact evaluators’ perceptions.

Primarily guided by the tenets of attribution and situational crisis communication theories, I studied the interactive and main effects of crisis response strategies (accommodative, reframing and defensive), crisis …