Digital Commons Network^™

A New Magnetic Topological Quantum Material Candidate By Design, Weiwei Xie, Xin Gui

Faculty Publications

Magnetism, when combined with an unconventional electronic band structure, can give rise to forefront electronic properties such as the quantum anomalous Hall effect, axion electrodynamics, and Majorana fermions. Here we report the characterization of high-quality crystals of EuSn2P2, a new quantum material specifically designed to engender unconventional electronic states plus magnetism. EuSn2P2 has a layered, Bi2Te3-type structure. Ferromagnetic interactions dominate the Curie-Weiss susceptibility, but a transition to antiferromagnetic ordering occurs near 30 K. Neutron diffraction reveals that this is due to two-dimensional ferromagnetic spin alignment within individual Eu layers and antiferromagnetic alignment between layers-this magnetic state surrounds the Sn-P layers …

Identification Of Particles With Lorentz Factor Up To 10 4 With Transition Radiation Detectors Based On Micro-Strip Silicon Detectors, J. Alozy, N. Belyaev, M. Campbell, M. Cherry, F. Dachs, S. Doronin, K. Filippov, P. Fusco, F. Gargano, E. Heijne, S. Konovalov, D. Krasnopevtsev, X. Llopart, F. Loparco, V. Mascagna, M. N. Mazziotta, H. Pernegger, D. Ponomarenko, M. Prest, D. Pyatiizbyantseva, R. Radomskii, C. Rembser, A. Romaniouk, A. A. Savchenko, D. Schaefer, E. J. Schioppa, D. Shchukin, D. Yu Sergeeva, E. Shulga, S. Smirnov, Y. Smirnov, M. Soldani, P. Spinelli

Faculty Publications

This work is dedicated to the study of a technique for hadron identification in the TeV momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to the radiating particles. A detector setup has been built and tested with particles in a wide range of Lorentz factors (from about 10 3 to about 4×10 4 crossing different types of radiators. The measured double-differential (in energy and angle) spectra of the TR photons are in a reasonably good agreement with TR simulation predictions.

Nonlinear Optical Studies Of Bulk And Thin Film Complex Materials, Joel E. Taylor

LSU Doctoral Dissertations

Nonlinear optical studies of bulk and thin film materials provide a vast playground for physical and dynamical characterization. In this thesis, we have implemented experimental methods to probe novel phase transitions in single crystals using rotational anisotropic second harmonic generation (RASHG) and carrier dynamics in thin films with time-resolved pump-probe reflectivity. Furthermore, a novel low temperature ultra-high vacuum system coupled to nonlinear optics has been developed to extend lab capabilities. Doping (Bi_1-xSb_x)₂Se₃ with antimony, the surface electronic reconstruction near x=80% was identified with RASHG by deviations in the six-fold and three-fold polarization anisotropic …

Multiformat Communication Strategies: A Conceptual Framework And Empirical Investigation Of Video Formats, Jordan Worth Moffett

LSU Doctoral Dissertations

Essay One was conducted to build a more complete view of bilateral, multiformat customer–firm communication. A review of communication theory builds a foundation for effective multiformat strategies across different exchange contexts (e.g., message complexity) and timing factors (e.g., relationship duration), while accounting for both positive and negative aspects of communication richness. Four perspectives on multiformat communication during exchange events suggest pertinent propositions and produce three parsimonious tenets. First, the authors propose a communication theory foundation for relationship marketing; second, they compile and synthesize extant research. Third, they identify six fundamental communication characteristics associated with different formats. Finally, they integrate insights …

Music Reading For Everybody: Notation For Laptop Music Making, Kathleen Alyse Winn

LSU Doctoral Dissertations

The purpose of this dissertation is to document the creation of a new music notation called KeyMusic for the ASCII/QWERTY keyboard on any computer platform. This notation is designed to enable those without musical training the ability to participate in music making. Creation of the notation is traced from its conception to the application of HCI (Human Computer Interaction) usability criteria to establish its efficacy for users. All of the pieces notated in this format so far, are transcriptions from traditional folk song and arrangements of classical melodies. The development of a chromatic, polytonal, multitimbral laptop instrument which is designed …

Effect Of Moisture On Dopant Segregation In Solid Hosts, Pragathi Darapaneni, Natalia S. Moura, Darrell Harry, David A. Cullen, Kerry M. Dooley, James A. Dorman

Faculty Publications

Transition metal-doped semiconductor materials are extensively employed for light harvesting and photocatalytic applications owing to their increased light absorption and charge mobility. In this work, spatial tailoring of the Ni dopant in TiO2 nanostructures is performed by varying the secondary processing parameters to engineer the resulting optoelectronic properties for select applications. Specifically, the aging of the dried Ti sol and the resulting Ni segregation are observed to be moisture-driven phenomena based on the infrared and time-resolved UV-vis spectroscopy measurements. While X-ray diffraction and scanning transmission electron microscopy coupled with electron energy-loss spectroscopy characterizations show a clear difference in the crystal …

Antimicrobial Properties Of Different Chitosans Against Gram-Negative And Gram-Positive Foodborne Pathogens In Food Products, Nancy Katherine Rubio Zapata

LSU Doctoral Dissertations

Chitosan is a polymer derived of the deacetylation of chitin that is one of the most abundant material in nature. Chitosan solutions applied as edible coatings, and dipping solutions have shown positive results in the extension of shelf life on seafood and meat products. The purpose of this study was to evaluate the antimicrobial activities of a newly invented high molecular weight water-soluble (HMWWS) chitosan against selected Gram-negative (Salmonella Typhimurium, Vibrio parahaemolyticus, Vibrio vulnificus, and Vibrio cholerae) and Gram-positive (Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus) foodborne pathogens (initial inoculation of 6.5 Log). Chitosans with …

A Model-Based Framework For The Smart Manufacturing Of Polymers, Santiago D. Salas Ortiz

LSU Doctoral Dissertations

It is hard to point a daily activity in which polymeric materials or plastics are not involved. The synthesis of polymers occurs by reacting small molecules together to form, under certain conditions, long molecules. In polymer synthesis, it is mandatory to assure uniformity between batches, high-quality of end-products, efficiency, minimum environmental impact, and safety. It remains as a major challenge the establishment of operational conditions capable of achieving all objectives together. In this dissertation, different model-centric strategies are combined, assessed, and tested for two polymerization systems.

The first system is the synthesis of polyacrylamide in aqueous solution using potassium persulfate …

Molecularly Heterogeneous Structure Of A Nonionic Deep Eutectic Solvent Composed Of N-Methylacetamide And Lauric Acid, Yaowen Cui, Jeramie C. Rushing, Soenke Seifert, Nicholas M. Bedford, Daniel G. Kuroda

Faculty Publications

© 2019 American Chemical Society. Deep eutectic solvents (DES) are a new class of designer solvents with a wide range of possible applications. DESs are typically made from an ionic compound and a hydrogen bond donor, but lately DESs made of nonionic compounds with interesting properties have started to appear. This study focuses on describing the structure, dynamics, and interactions of a nonionic DES composed of N-methylacetamide (NMA) and lauric acid (LA). Linear IR and time-resolved IR experiments show that LA-NMA DES is the result of hydrogen bond interaction between the two molecular components, though the interaction energy is only …

Improving The Food Safety Of Louisiana Strawberry Industry, Jose L. Brandao Delgado

LSU Doctoral Dissertations

Escherichia coli O157:H7, Salmonella sp., and Listeria monocytogenes have been linked to foodborne outbreaks in produce. The most recent outbreaks in produce have been associated with irrigation water due to infiltration of well water or water run-off from contaminated sources. The Food Safety Modernization Act (FSMA) requires all irrigation water to be safe for use on produce, as a strategy to reduce foodborne illnesses. A surfactant modified zeolite (SMZ) filtration system could provide produce farmers with a sustainable low-cost system for high-quality and safe irrigation water. The objective of this study was to evaluate the effectiveness of hexadecyltrimethylammonium …

Authentic Csr In Professional Sport Organizations: Application Of A Theoretical Framework, Yoseph Mamo

LSU Doctoral Dissertations

Within the present dissertation, determinants for authentic CSR, process and outcomes are explored. A three-paper multiple method examination has been conducted, including a conceptual paper framework (Chapter 2), a structural equation model (Chapter 3), and MANOVA analysis (Chapter 4). Chapter 2 extends literature on when, why, and how professional sport organizations (PSO) can develop authentic CSR activities that can have a long-term positive impact on stakeholders. Chapter 3 advances literature on identifying the relevant dimensions of CSR that are supported by the fans rather than using a more holistic approach will advance our understanding of the relationships between different types …

Microscopic View On Structure And Dynamics In Polymer Nanocomposites, Stefan Otto Huber

LSU Doctoral Dissertations

The focus of this thesis is on the single chain conformation and dynamics in polymer melts, nanocomposite melts and networks. The exploration of structure, morphology and dynamics has shown to be crucial to understand the basic science in such systems, like the influence of entropy, confinement, and monomeric friction. These parameters can be translated into the macroscopic behavior of the materials. The scientific work on model nanocomposite systems contributes to accelerate the development of materials, and also to invent to date unknown materials with uprecedented properties, needed for car tires, low weight but ultra strong materials or batteries. This thesis …

Global-Mindedness In National Geographic Certified Educators, Amy Pan

LSU Doctoral Dissertations

ABSTRACT

The purpose of this mixed methods study is to investigate the global-mindedness among National Geographic Certified Educators. The triangulation of data includes quantitative data, which is the Global-Mindedness Scale (Hett, 1993), and qualitative data, which is the questionnaire, and sample lesson plans. The survey results were based on 485 participants, with 286 National Geographic Certified Educators and 199 non-National Geographic Certified Educators. The survey was conducted through Qualtrics© with privacy protection and the Statistical Package of Social Science (SPSS) was used for a two-tailed independent sample t-test and Repeated Measures ANOVA to analyze the data. Google Forms was …

Polybrominated Diphenyl Ethers (Pbdes) In Ambient Air Samples At The Electronic Waste (E-Waste) Reclamation Site, Ajit Ghimire, Albert Leo N. Dela Cruz, Roberto Wong, Panida Navasumrit, Stephania Cormier, Slawomir M. Lomnicki

Division of Basic Science Faculty Publications

Polybrominated diphenyl ethers (PBDEs) have been used as flame retardants in various building materials, plastic and other polymers, airplanes, electronics, etc. All or some of their congeners have been already banned in many countries, due to their persistency and adverse health effects. In this study, we are focusing on e-wastes as a source of emission of PBDEs in ambient air during reclamation processes. The ambient air particulate matter (PM) samples were collected at and near an e-waste reclamation site in Bangkok, Thailand. Results showed the presence of various homologues, viz: tri-, tetra-, penta-, hexa-, and hepta-PBDEs in both PM2.5 and …

Directed Pore Uptake And Phase Separation Of Surfactant Solutions Under Confinement, Yao Wu, Yingzhen Ma, Lilin He, Gernot Rother, William A. Shelton, Bhuvnesh Bharti

Faculty Publications

The ability of a porous material to uptake and release molecules is determined by the thermodynamic state of preadsorbed surfactants in pore space. However, the effect of spatial confinement on the thermodynamic state of the surfactants is poorly understood. In this study, we use a combination of small-angle neutron scattering experiments and all-atom molecular dynamics simulations to develop a better understanding of the effect of confinement on self-assembly and temperature-induced liquid-liquid phase separation of surfactant solutions. Here, we study the demixing of a model nonionic surfactant triethyleneglycol monohexyl ether (C6E3) in tubular nanopores of the SBA-15 silica material (pore diameter …

Characterizing The Subcellular Localization, Activity, And Physiological Properties Of Α-Carbonic Anhydrases In Arabidopsis Thaliana, Kayla Schwartzenburg

Honors Capstones

No abstract provided.

Building A Better Batture: A Regional Recreational Enhancement Around The Morganza To The Gulf Levee, Taylor N. Fehmel

LSU Master's Theses

Twenty-five years ago, the existing flood protection levees along the Louisiana coastline were removed and construction was started by Terrebonne Levee and Conservation District on a new project called ‘Morganza to the Gulf’ or MTG. This project was undertaken to construct a new flood protection levee system around Louisiana in the communities in Terrebonne and Lafourche Parish. The MTG Levee is one of the first coastal projects in Louisiana to incorporate a risk-based analysis for a double levee system containing both local parish drainage levees and future storm surge levees of MTG. It was designed to protect approximately 250,000 people …

Rules Of Distributary Engagement: Cultural Adaptation And Digital Enhancement Of Hydro-Ecological Decision-Making In The Mekong Delta, Việt Nam, Clare-Mai H. Nguyen

LSU Master's Theses

Focused on current initiatives for climate resilience, this paper explores a culturally adaptive approach to participatory planning in the Vietnamese Mekong Delta. It details key engagement components to accompany the use of Tangible Landscape, an interactive, data-driven modeling platform, in a series of workshops sponsored by the World Bank. Innovations like Tangible Landscape hold the potential to significantly increase stakeholders’ accessibility to scientific data and scenario models. To what extent do the specificity of place and culture determine the efficacy of these tools in democratizing decision-making?

This paper delves into Việt Nam’s socioeconomic development through Mekong agriculture, as well as …

Women Of The Edward J. Gay Family As Textile And Dress Consumers In Louisiana, 1849-1899, Lindsay Danielle Reaves

LSU Doctoral Dissertations

Economic, social, and cultural historians have studied and analyzed consumption behaviors throughout the 20^th century and into the 21^st century. Decorative household textiles and dress items are two product categories that follow the consumption process. American consumption behaviors during the introduction of mass-produced textiles and dress items throughout the 19^th century have not been well documented.

The purpose of this research is to expand the knowledge of Southern planter-class women’s consumer behavior in relation to decorative household textiles and dress items. Arnould and Thompson’s (2005) Consumer Culture Theory and Belk’s (1988) research into possessions and the extended …

The Corridor Des Arts, Kade M. Jones

LSU Master's Theses

Arnaudville is a small rural town in south central Louisiana with a population of 1200. In 2010, the National Endowment of the Arts (NEA) named Arnaudville as one of fourteen cities that were classified as a successful case study of “Creative Placemaking.” The NEA defines creative placemaking as community partnerships that use arts and culture to shape the social, environmental, and economic identity of a place. The NUNU Arts and Culture Collective, a Louisiana Cajun French non-profit arts organization centered in Arnaudville, is the main catalyst of this effort.

Members of NUNU have identified five other rural towns within close …

Behavioral Health Practice Competencies Among Graduate Social Work Students: A Program Evaluation, Jane C. Barney

LSU Master's Theses

The Health Services and Resource Administration (HRSA) of the Department of Health and Human Services (DHHS) has recognized a need for mental health and substance abuse services for children, adolescents, and transitional youth who are at-risk for developing behavioral health disorders. In response to this need, the Obama administration delegated funds to multiple universities for the purpose of expanding the social work labor force. Louisiana State University is among those that received a block grant, allowing some of the students in the School of Social Work to participate in a Behavioral Health Workforce Education Training (BHWET) Program. This quasi-experimental study …

Toxic Culture: An Emotion And Sentiment Analysis Of College Football Fans In Relation To Controversy And Win-Loss Records, Joshua R. Jackson

LSU Master's Theses

Fans of certain college football teams will experience a wide array of emotions when their team is involved in a scandal. This study examined the fan bases of three university football teams as they learn about and react on social media to their schools and head coaches becoming implicated in controversies. Under the protection of those with similar likes and the secrecy of social media, users can voice opinions in favor of and against the football team’s firing of a coach or handling of an investigation. Fan bases analyzed in the study are Ohio State University, Maryland University, and Baylor …

Making The Commercial Non-Commercial: Traditional Ad Effects On Tv Billboards, Ian M. Skupski

LSU Master's Theses

Using a 2x2 experimental design, this study evaluated the effectiveness of two ad factors on TV billboards. Four experimental conditions were created around a previously aired Olympic hockey game to measure how contextual fit and cross-promotion affect audience evaluations of a brand presented on a TV billboard. The hypotheses predicted measurable effects based on past advertisement and sponsorship literature. A total of 150 usable respondents returned significant main effect results, as well as supporting interaction effect results. Particularly, contextual fit encouraged participant purchase intention and the presence of cross-promotion encouraged more positive attitudes toward a brand. Limitations and future research …

Linking Water Quality To Aedes Aegypti And Zika In Flood-Prone Neighborhoods, Rebeca De Jesus Crespo

Faculty Publications

No abstract provided.

Plasticity, Technicity, Writing, Deborah Goldgaber

Faculty Publications

No abstract provided.

Item Comparison Of Two Language Assessments In Children With Autism Spectrum Disorder, Christina M. Hensgens

LSU Master's Theses

The language skills of children with ASD vary across the population and prove challenging to assess for many reasons. The current study was designed to compare two language assessments for children with ASD to gain understanding in determining the best method for assessment. The Preschool Language Scale-5 (PLS-5) is a standardized language assessment commonly used in the field of Speech-Language Pathology, while the Verbal Behavioral Milestones Assessment and Placement Program (VB-MAPP) is commonly used in Applied Behavior Analysis. Scores from children with ASD (N=17) on a total of 64 functionally equivalent items from both assessments were analyzed to determine the …

Making Connaught Place (New Delhi, India) Bicycle And Pedestrian Friendly, Surabhi Jain

LSU Master's Theses

India is a place where people have walked miles since ancient times for basic day-to-day needs like water, food, education, shopping, entertainment, tourism, and shelter. However, the rapid growth in population and urbanization is changing the way people live and commute. The urban sprawl is pushing people to the outskirts of the city core because of which personal automobiles is becoming the main source of transportation. This is leading to congestion on roads for most times of the day. The objective of this thesis is to explore and examine how to improve pedestrian and bicycle facilities in a prominent commercial …

S19rs Sgfb No. 5 (Sxsw Conference), Cheatwood

Student Senate Enrolled Legislation

A FINANCE BILL

To allocate six thousand five hundred dollars and zero cents $6,500 from the Legislative Contingency account to fund the registration costs of the students attending the 2019 SXSW conference in Austin, Texas March 8-12

Ionic Conductivity And Counterion Condensation In Nanoconfined Polycation And Polyanion Brushes Prepared From Block Copolymer Templates, Christopher G. Arges, Ke Li, Le Zhang, Yu Kambe, Guang Peng Wu, Baraka Lwoya, Julie N.L. Albert, Paul F. Nealey, Revati Kumar

Faculty Publications

© 2019 The Royal Society of Chemistry. Microphase separated block copolymer electrolyte (BCE) systems are attractive candidates for electrochemical systems because the concentrated ionic groups in one block provide pathways for facile ion transport while the non-ionic block bestows mechanical integrity and suppresses excess water uptake. Numerous researchers have prepared and studied bulk BCEs as ion conductors, but the inherent complex nature and imprecise architecture of these materials make it difficult to extract definitive conclusions on how the macromolecular structure influences ion transport. In this work, the process of block copolymer lithography was demonstrated to create model nano-confined polymer electrolyte …

Influence Of Sorghum Cultivar, Phenological Stage, And Fertilization On Development And Reproduction Of Melanaphis Sacchari (Hemiptera: Aphididae), Blake E. Wilson, Jeffrey Davis, Thomas Reagan, Luna Lama

Faculty Publications

The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive pest of grain sorghum, Sorghum bicolor (L) Moench (Poaceae). Since its first outbreak in sorghum in 2013, severe infestations have spread throughout the southern USA, causing major economic losses. Whereas insecticide applications can mitigate some of the pest's impacts, a sustainable ecology-based management program is needed to reduce reliance on chemical control. Two greenhouse assays examined the influence of selected host plant characteristics on M. sacchari life table parameters. We studied the effects of silicon (rates equivalent to 0 and 3,360 kg silicon per ha) and nitrogen (rates equivalent …