Digital Commons Network^™

Experience That Works: An Investigation Uncovering Essential Elements Of Field Experiences And Internships Within Principal Preparation Programs That Significantly Impact And Contribute To Principal Effectiveness, Nathan Wayne Hite

LSU Doctoral Dissertations

This study applied situational leadership and transformational leadership theories to discern essential elements of principal preparation program field experiences and internships that contributed most to principal effectiveness. Identifying critical components of principal preparation field experiences and internships were imperative to ensure principal effectiveness within the ever-changing landscape of education. The objective of this study was to discover essential components of field experiences and internships provided by principal preparation programs that contributed most to principal effectiveness, increasing the likelihood public school districts hired principal candidates who were equipped with the skills necessary to step into the position with minimal on-the-job training. …

"A Sort Of Pain, Which Is New": Unresolved Grief In British Romantic Literature, Eta Farmacelia Nurulhady

LSU Doctoral Dissertations

This dissertation examines the cultural phenomenon of mourning in relation to British Romantic Literature. In chapters on the work of William Wordsworth, Jane Austen, Felicia Hemans, and Charles Lamb, it argues that the Romantic period, as a time of increased mobility due to three revolutions, wars, and the expansion of empire, was a moment when unresolved grief became a common experience. Using the psychologist Pauline Boss’s concept of “ambiguous loss” as a lens for a new reading of British Romantic writing, and distinguishing this concept from the modern concept of “nostalgia,” this dissertation analyzes poetry, novels, and essays written by …

Household Salt Production By The Late Classic Maya: Underwater Excavations At Ta'ab Nuk Na, Heather Mckillop, E. Cory Sills

Faculty Publications

Salt is an essential commodity; archaeological remains around the world attest to the importance of its production, exchange and consumption. Often located in coastal locations, many production sites were submerged by rising seas, including the Paynes Creek Salt Works on the southern Belize coast. Survey and excavation of these sites has identified 'kitchens' for brine boiling, as well as Terminal Classic residential structures at Ek Way Nal. The authors report the discovery of an earlier residential building alongside salt kitchens at the nearby site of Ta'ab Nuk Na. This finding indicates that surplus household production began during the Late Classic, …

Identity Composition: A Qualitative Study Of Community College English Composition And Lgbtq-Inclusive Pedagogical Practices, Lucas Michel Gassen

LSU Doctoral Dissertations

This research investigates the identity-based practices and experiences of English composition instructors who teach at community colleges and assesses the extent to which LGBTQ-inclusive pedagogical approaches are undertaken to meet the needs of sexual and gender minority students. The participant pool was comprised of community college instructors within the Louisiana Community and Technical College System (LCTCS) who have taught English composition courses within the past five years. This study aims to answer the following research questions: 1. In what ways and to what extent is identity-based instructional content incorporated in community college English composition courses? 2. In what ways and …

A Numerical And Machine Learning Investigation Of Water Quality In The Northern Gulf Of Mexico, From Estuaries To Shelf, Yanda Ou

LSU Doctoral Dissertations

In this study, numerical and machine learning (ML) models are developed and adapted to investigate the water quality of the Barataria Estuary and the Louisiana-Texas (LaTex) Shelf in northern Gulf of Mexico. By using a 3-D hydrodynamic ROMS model, the salinity variability of the Barataria Estuary is found highly influenced by the Mississippi River discharges and man-made river diversion systems. The Mississippi River freshwater can intrude into the estuary through the middle and the east passes. Sensitivity tests indicate that decreases in lower estuarine salinity due to the elevated Mississippi River discharges are more apparent than the salinity increases due …

Of Language And Thought: American Political Discourse, Normative Reason, And Essentially Contested Concepts, Riley Clare Valentine

LSU Doctoral Dissertations

This dissertation analyzes progressive liberalism and neoliberalism as forms of normative reason that redefine specific political concepts, which are central to American liberalism – equality, liberty, the role of the State, and the pursuit of happiness. I contend that language is an important expression of normative reason. Language is how political reason and the norms accompanying it are expressed. I move through Presidents Franklin Delano Roosevelt to Barack Obama, exploring shifts in language and interpretations of political concepts through progressive liberal and neoliberal forms of normative reason. I argue that a tension emerges between progressive liberalism and neoliberalism, and a …

Event Horizons Are Tunable Factories Of Quantum Entanglement, Ivan Agullo, Anthony J. Brady, Dimitrios Kranas

Faculty Publications

That event horizons generate quantum correlations via the Hawking effect is well known. We argue, however, that the creation of entanglement can be modulated, as desired, by appropriately illuminating the horizon. We adapt techniques from quantum information theory to quantify the entanglement produced during the Hawking process and show that, while ambient thermal noise (e.g. cosmic microwave background radiation) degrades it, the use of squeezed inputs can boost the nonseparability between the interior and exterior regions in a controlled manner. We further apply our ideas to analog event horizons concocted in the laboratory and insist that the ability to tune …

Fall 2022 Catalog, Lsu Press

LSU Press Seasonal Catalogs

No abstract provided.

The Small Ras Superfamily Gtpase Rho4 Of The Maize Anthracnose Fungus Colletotrichum Graminicola Is Required For Β-1,3-Glucan Synthesis, Cell Wall Integrity, And Full Virulence, Ely Oliveira-Garcia, Lala Aliyeva-Schnorr, Alan De Oliveira Silva, Seif El Din Ghanem, Kathrin Thor, Edgar Peiter, Holger B. Deising

Faculty Publications

Small Ras superfamily GTPases are highly conserved regulatory factors of fungal cell wall biosynthesis and morphogenesis. Previous experiments have shown that the Rho4-like protein of the maize anthracnose fungus Colletotrichum graminicola, formerly erroneously annotated as a Rho1 protein, physically interacts with the β-1,3-glucan synthase Gls1 (Lange et al., 2014; Curr. Genet. 60:343–350). Here, we show that Rho4 is required for β-1,3-glucan synthesis. Accordingly, Δrho4 strains formed distorted vegetative hyphae with swellings, and exhibited strongly reduced rates of hyphal growth and defects in asexual sporulation. Moreover, on host cuticles, conidia of Δrho4 strains formed long hyphae with hyphopodia, rather than short …

Louisiana Agriculture Fall, 2022

Louisiana Agriculture

Livestock industries contribute $2.5 billion to the state’s economy, and beef cattle production is one of the most important sectors of the state’s agricultural enterprise. LSU AgCenter researchers study how to improve cattle production at research stations across the state. AgCenter Extension agents in every parish connect producers with their findings.

In this issue of Louisiana Agriculture magazine, livestock agents and research faculty describe the many programs they have developed to educate cattle producers and help 4-H’ers raise and show animals. Producers discuss what they have learned from Master Cattleman classes, and writer V. Todd Miller details how some cattle …

Profiling Of Shelter Campers, Their Attitudes, And Perceptions Towards Environmental Impacts Of Campsite Use And Management: Evidence From National Parks Of Sri Lanka, Priyan Perera, Shashini Tara Mallikage, David Newsome, Richard Vlosky

Faculty Publications

There is a dearth of research describing the campsite user segment and in assessing camp-site users’ perceptions of the bio-physical impacts of campsite use in Sri Lanka. Using a structured questionnaire, we evaluated campsite user characteristics, visitor motivations, behaviors, and how visitor experience is affected by visible biophysical impacts at campsites. Based on underlying visitor motivations derived through a Factor Analysis and Cluster Analysis, we identified three distinct segments of campsite users: Eco-tourists, Prestige seekers, and Adventure seekers. Results indicate that the overall cleanliness of the campsite is an important attribute that affects the visitor experience. The Ecotourist segment reported …

Antimicrobial Resistant Bacteria In Shrimp And Shrimp Farms Of Bangladesh, Murshida Khan, Sulav Indra Paul, Md Mahbubur Rahman, Julie Anderson Lively

Faculty Publications

The purpose of this study was to investigate the presence of pathogenic bacteria, specifically Escherichia coli and Salmonella and Vibrio species, and their antimicrobial resistance in shrimp aquaculture facilities of Bagerhat (Bangladesh). Sediment samples were collected from both Penaeus monodon and Macrobrachium rosenbergii farms and shrimp samples from the Macrobrachium rosenbergii facility. The abovementioned bacteria were not found, but five Enterobacterales (Proteus penneri, Proteus alimentorum, Morganella morganii, Enterobacter hormaechei subsp. xiangfangensis and Plesiomonas shigelloides) were detected. This is the first documented case of Enterobacter hormaechei subsp. xiangfangensis in a shrimp farm. Nine antibiotics—ampicillin, gentamicin, chloramphenicol, oxytetracycline, nitrofurantoin, levofloxacin, ciprofloxacin, azithromycin, …

A Physical Activity Intervention In Older African Americans: The Paace Pilot Randomized Controlled Trial, Robert L. Newton, Robbie Beyl, Callie Hebert, Melissa Harris, Leah Carter, William Gahan, Owen Carmichael

Clinical Research Faculty Publications

Introduction Older African Americans have low levels of physical activity, which increases the risk of aging-related health conditions. This study aimed to determine the effectiveness of, and satisfaction with, a community-engaged physical activity intervention targeting older African Americans. Methods Fifty-six older African Americans were randomized to a successful aging group (SAG) or a physical activity group (PAG) for 12 wk. The PAG consisted of two weekly group exercise sessions and two to three home-based exercise sessions per week. The SAG consisted of weekly group educational sessions related to various aspects of healthy aging. Physical activity was measured by ActiGraph accelerometers …

Measuring The Effect Of Bipartisan Support For Foreign Policy Initiatives In The Senate On U.S. Policy Success, Emily Fitkin

Honors Capstones

No abstract provided.

Signatures Of Multiband Effects In High-Harmonic Generation In Monolayer Mos2, Lun Yue, Richard Hollinger, Can B. Uzundal, Bailey Nebgen, Ziyang Gan, Emad Najafidehaghani, Antony George, Christian Spielmann, Daniil Kartashov, Andrey Turchanin, Diana Y. Qiu, Mette B. Gaarde, Michael Zuerch

Faculty Publications

High-harmonic generation (HHG) in solids has been touted as a way to probe ultrafast dynamics and crystal symmetries in condensed matter systems. Here, we investigate the polarization properties of high-order harmonics generated in monolayer MoS2, as a function of crystal orientation relative to the mid-infrared laser field polarization. At several different laser wavelengths we experimentally observe a prominent angular shift of the parallel-polarized odd harmonics for energies above approximately 3.5 eV, and our calculations indicate that this shift originates in subtle differences in the recombination dipole strengths involving multiple conduction bands. This observation is material specific and is in addition …

Resonant Plasmonic–Biomolecular Chiral Interactions In The Far-Ultraviolet: Enantiomeric Discrimination Of Sub-10 Nm Amino Acid Films, Tiago Ramos Leite, Lin Zschiedrich, Orhan Kizilkaya, Kevin M. Mcpeak

Faculty Publications

Resonant plasmonic–molecular chiral interactions are a promising route to enhanced biosensing. However, biomolecular optical activity primarily exists in the far-ultraviolet regime, posing significant challenges for spectral overlap with current nano-optical platforms. We demonstrate experimentally and computationally the enhanced chiral sensing of a resonant plasmonic–biomolecular system operating in the far-UV. We develop a full-wave model of biomolecular films on Al gammadion arrays using experimentally derived chirality parameters. Our calculations show that detectable enhancements in the chiroptical signals from small amounts of biomolecules are possible only when tight spectral overlap exists between the plasmonic and biomolecular chiral responses. We support this conclusion …

Comparative Efficacy Of A Fungal Entomopathogen With A Broad Host Range Against Two Human-Associated Pests, Aaron R. Ashbrook, Aram Mikaelyan, Coby Schal

Faculty Publications

The ability of a fungal entomopathogen to infect an insect depends on a variety of factors, including strain, host, and environmental conditions. Similarly, an insect’s ability to prevent fungal infection is dependent on its biology, environment, and evolutionary history. Synanthropic pests have adapted to thrive in the indoor environment, yet they arose from divergent evolutionary lineages and occupy different feeding guilds. The hematophagous bed bug (Cimex lectularius) and omnivorous German cockroach (Blattella germanica) are highly successful indoors, but have evolved different physiological and behavioral adaptations to cope with the human-built environment, some of which also reduce the efficacy of fungal …

Redox-Engineering Enhances Maize Thermotolerance And Grain Yield In The Field, Stuart A. Sprague, Tej Man Tamang, Trevor Steiner, Qingyu Wu, Ying Hu, Tayebeh Kakeshpour, Jungeun Park, Jian Yang, Zhao Peng, Blake Bergkamp, Impa Somayanda, Morgan Peterson, Ely Oliveira Garcia, Yangfan Hao, Paul St. Amand, Guihua Bai, Paul A. Nakata, Ivo Rieu, David P. Jackson, Ninghui Cheng, Barbara Valent, Kendal D. Hirschi, Sv Krishna Jagadish, Sanzhen Liu, Frank F. White, Sunghun Park

Faculty Publications

Increasing populations and temperatures are expected to escalate food demands beyond production capacities, and the development of maize lines with better performance under heat stress is desirable. Here, we report that constitutive ectopic expression of a heterologous glutaredoxin S17 from Arabidopsis thaliana (AtGRXS17) can provide thermotolerance in maize through enhanced chaperone activity and modulation of heat stress-associated gene expression. The thermotolerant maize lines had increased protection against protein damage and yielded a sixfold increase in grain production in comparison to the non-transgenic counterparts under heat stress field conditions. The maize lines also displayed thermotolerance in the reproductive stages, resulting in …

Climate Trends And Behavior Of A Model Amazonian Terrestrial Insectivore, Black-Faced Antthrush, Indicate Adjustment To Hot And Dry Conditions, Vitek Jirinec, Elisa C. Elizondo, Patricia F. Rodrigues, Philip C. Stouffer

Faculty Publications

Rainforest loss threatens terrestrial insectivorous birds throughout the world's tropics. Recent evidence suggests these birds are declining in undisturbed Amazonian rainforest, possibly due to climate change. Here, we first asked whether Amazonian terrestrial insectivorous birds were exposed to increasingly extreme ambient conditions using 38 years of climate data. We found long-term trends in temperature and precipitation at our study site, especially in the dry season, which was ~1.3°C hotter and 21% drier in 2019 than in 1981. Second, to test whether birds actively avoided hot and dry conditions, we used field sensors to identify periodic intervals of ambient extremes and …

Defining Relative Yield For Soil Test Correlation And Calibration Trials In The Fertilizer Recommendation Support Tool, Austin W. Pearce, Nathan A. Slaton, Sarah E. Lyons, Carl H. Bolster, Tom W. Bruulsema, John H. Grove, John D. Jones, Josh M. Mcgrath, Fernando E. Miguez, Nathan O. Nelson, Deanna L. Osmond, Md Rasel Parvej, Eugenia M. Pena-Yewtukhiw, John T. Spargo

Faculty Publications

The Fertilizer Recommendation Support Tool (FRST) will perform correlations between soil nutrient concentrations and crop response to fertilization from user-selected datasets in the FRST national database. Yield response for the nutrient of interest in a particular site-year is presented as relative yield (RY), a ratio of unfertilized yield to the maximum attainable yield (A). Several methods exist in the literature for estimating A and calculating RY but the effect of method choice on soil test correlation outcomes is undocumented. We used six published methods to calculate RY from site-year yield data for five published correlation datasets, and fit a generalized …

Applied Nutritional Investigationeffects Of Acute Arginine Supplementation On Neuroendocrine, Metabolic, Cardiovascular, And Mood Outcomes In Younger Men: A Double-Blind, Placebo-Controlled Trial, John W. Apolzan, Jesse A. Stein, Jennifer C. Rood, Robbie A. Beyl, Shengping Yang, Frank L. Greenway, Harris R. Lieberman

Clinical Research Faculty Publications

Objectives: Arginine is an amino-acid supplement and precursor for nitric-oxide synthesis, which affects various biologic processes. The objective of this study was to determine the effects of arginine supplementation on growth hormone (GH) and metabolic parameters. Methods: Thirty physically active, healthy men (age 18–39 y; body mass index: 18.5–25 kg/m2) were randomized in a double-blind, placebo-controlled, crossover trial. Arginine (10 g) and placebo (0 g) beverages were consumed after an overnight fast. Blood samples were collected at baseline and 1.5, 3.0, and 24 h after supplementation. The primary outcomes were serum GH and metabolomics. Also, amino acids, glucose, insulin, triacylglycerols, …

Measurement Of The Π- -Ar Total Hadronic Cross Section At The Lariat Experiment, E. Gramellini, J. Ho, R. Acciarri, C. Adams, J. Asaadi, M. Backfish, W. Badgett, B. Baller, V. Basque, O. Benevides Rodrigues, F. D.M. Blaszczyk, R. Bouabid, C. Bromberg, R. Carey, R. Castillo Fernandez, F. Cavanna, J. I. Cevallos Aleman, A. Chatterjee, P. Dedin, M. V. Dos Santos, D. Edmunds, C. Escobar, J. Esquivel, J. J. Evans, A. Falcone, W. Flanagan, B. T. Fleming, W. Foreman, D. Garcia-Gamez, D. Gastler, T. Ghosh, R. A. Gomes, R. Gran

Faculty Publications

We present the first measurement of the negative pion total hadronic cross section on argon in a restricted phase space, which we performed at the Liquid Argon In A Testbeam (LArIAT) experiment. All hadronic reaction channels, as well as hadronic elastic interactions with scattering angle greater than 5° are included. The pions have kinetic energies in the range 100-700 MeV and are produced by a beam of charged particles impinging on a solid target at the Fermilab test beam facility. LArIAT employs a 0.24 ton active mass liquid argon time projection chamber (LArTPC) to measure the pion hadronic interactions. For …

Bloch Waves In High Contrast Electromagnetic Crystals, Robert Lipton, Robert Viator, Silvia Jiménez Bolanõs, Abiti Adili

Faculty Publications

Analytic representation formulas and power series are developed describing the band structure inside non-magnetic periodic photonic three-dimensional crystals made from high dielectric contrast inclusions. Central to this approach is the identification and utilization of a resonance spectrum for quasiperiodic source-free modes. These modes are used to represent solution operators associated with electromagnetic and acoustic waves inside periodic high contrast media. A convergent power series for the Bloch wave spectrum is recovered from the representation formulas. Explicit conditions on the contrast are found that provide lower bounds on the convergence radius. These conditions are sufficient for the separation of spectral branches …

Early To Middle Miocene Ice Sheet Dynamics In The Westernmost Ross Sea (Antarctica): Regional Correlations, Lara F. Pérez, Robert M. Mckay, Laura De Santis, Robert D. Larter, Richard H. Levy, Timothy R. Naish, John B. Anderson, Philip J. Bart, Martina Busetti, Gavin Dunbar, Chiara Sauli, Christopher C. Sorlien, Marvin Speece

Faculty Publications

The present-day morpho-stratigraphy of the Ross Sea is the result of Cenozoic tectonic and cryospheric events, and constitutes a key record of Antarctica's cryospheric evolution. An enduring problem in interpreting this record in a broader regional context is that the correlation between eastern and western Ross Sea stratigraphy has remained uncertain due to the limited number of drill sites. We correlate the glacial-related features observed on a dense network of seismic reflection profiles in McMurdo Sound with those identified in the Nordenskjöld and Drygalski Basins, as well as the basins farther east in the central Ross Sea. We present an …

Estimating R0 From Early Exponential Growth: Parallels Between 1918 Influenza And 2020 Sars-Cov-2 Pandemics, Grant Foster, Bret D. Elderd, Robert L. Richards, Tad Dallas

Faculty Publications

The large spatial scale, geographical overlap, and similarities in transmission mode between the 1918 H1N1 influenza and 2020 SARS-CoV-2 pandemics together provide a novel opportunity to investigate relationships between transmission of two different diseases in the same location. To this end, we use initial exponential growth rates in a Bayesian hierarchical framework to estimate the basic reproductive number, R0, of both disease outbreaks in a common set of 43 cities in the United States. By leveraging multiple epidemic time series across a large spatial area, we are able to better characterize the variation in R0 across the United States. Additionally, …

Rates Of Future Climate Change In The Gulf Of Mexico And The Caribbean Sea: Implications For Coral Reef Ecosystems, A. E. Lawman, S. G. Dee, K. L. Delong, A. M.S. Correa

Faculty Publications

Rising temperatures and ocean acidification due to anthropogenic climate change pose ominous threats to coral reef ecosystems in the Gulf of Mexico (GoM) and the western Caribbean Sea. Unfortunately, the once structurally complex coral reefs in the GoM and Caribbean have dramatically declined since the 1970s; relatively few coral reefs still exhibit a mean live coral cover of >10%. Additional work is needed to characterize future climate stressors on coral reefs in the GoM and the Caribbean Sea. Here, we use climate model simulations spanning the period of 2015–2100 to partition and assess the individual impacts of climate stressors on …

Applications Of Temperature Transient Analysis For Reservoir Surveillance, Refaat Galal Aboelfotoh Hashish

LSU Doctoral Dissertations

Reservoir monitoring is a key factor in the management of oil and gas resources. With the recent developments of permanent downhole temperature monitoring tools such as Fiber-Optic Distributed Temperature Sensing (FO-DTS), temperature transient analysis has evolved as a new alternative for reservoir monitoring. In this work, different techniques of temperature data analysis are presented for monitoring and characterization of hydrocarbon and geologic carbon storage (GCS) reservoirs. The objective of this study is to present new approaches that enable monitoring injection profile through vertical and horizontal injection wells using temperature warmback analysis. Application of temperature warmback analysis is also extended for …

Dynamic Modeling Of Aba-Dependent Expression Of The Arabidopsis Rd29a Gene, Ruth Ndathe, Renee Dale, Naohiro Kato

Faculty Publications

The abscisic acid (ABA) signaling pathway is the key defense mechanism against drought stress in plants. In the pathway, signal transduction among four core proteins, pyrabactin resistance (PYR), protein phosphatase 2C (PP2C), sucrose-non-fermenting-1-related protein kinase 2 (SnRK2), and ABRE binding factor (ABF) leads to altered gene expression kinetics that is driven by an ABA-responsive element (ABRE). A most recent and comprehensive study provided data suggesting that ABA alters the expression kinetics in over 6,500 genes through the ABF-ABRE associations in Arabidopsis. Of these genes, termed ABA gene regulatory network (GRN), over 50% contain a single ABRE within 4 kb of …

Understanding Consumers' Use Experience On Electrically Heated Jacket: A Study On Online Review Using Topic Modeling, Md Nakib-Ul Hasan

LSU Doctoral Dissertations

The demand for heated jackets is anticipated to be fuelled by frequent temperature drops, severe winter weather, and increasing outdoor activities. Electrically heated jackets (EHJ) are primarily marketed through online distribution channels and expansion of online sales channels is expected to boost the global market. Consumers are increasingly relying on online reviews from other consumers to help them decide what to buy. Businesses also actively monitor and manage their online reviews to build trust in their brand and make it more likely that customers will buy. Traditional approaches for assessing customer behavior, such as market research surveys and focus groups, …

Assessing The Current State Of Louisiana's Crawfish Fishery: Trends And Challenges In Wild Capture And Aquaculture, Mahala G. Gambill

LSU Master's Theses

Crawfish are found throughout the southern U.S.; however, Louisiana is by far the largest producer. The state’s industry includes harvesting wild crawfish from natural habitats such as bayous, swamps, and marshes, and crawfish reared in outdoor ponds. Although commercial harvest records are available, characterization of Louisiana’s wild capture crawfish fishery in recent years is undocumented, and analysis of environmental variables that could be correlated with annual harvest totals have not yet been explored. Using trip ticket data from the Louisiana Department of Wildlife and Fisheries, I characterized monthly and annual trends within Louisiana basins to assess changes in crawfish harvest …