Digital Commons Network^™

Constructing Large-Scale Complex Aquifer Systems With Big Well Log Data: Louisiana Model, Hamid Vahdat-Aboueshagh, Frank T.C. Tsai

Faculty Publications

This study introduces a lithofacies modeling method to construct a complex Louisiana stratigraphy model up to depth of 900 m using more than 114,000 well logs. Lithofacies intervals in one well log can be as many as 76. Louisiana comprises a number of interconnected aquifer systems and distinct geological features, such as angular unconformities, domes, and faults. The method contains processes of tessellation, discretization, translation, and interpolation to accommodate these geological features. First, the model domain is tessellated into tiles. Formations have the same dip direction within the same tile, but may have varying dip angles. Each tile is then …

The Influence Of Geographic Variation In Vegetation Characteristics On Habitat Use And Productivity Of An Endangered Warbler, Ashley M. Long, Heather A. Mathewson, Michael L. Morrison

Faculty Publications

Understanding how geographic variation in environmental conditions influences species’ distributions and population dynamics is critical for effective management of at-risk species and can help us anticipate wildlife responses to future change. The Golden-cheeked Warbler (Setophaga chrysoparia; hereafter warbler) is an endangered migratory songbird that nests in oak-juniper woodland in Texas. From 2009 to 2013, we monitored 895 warbler territories at 90 study sites located across the warbler's breeding range to examine how geographic variation in vegetation characteristics influenced aspects of warbler habitat selection and productivity. We found range-wide variation in the tree species composition and vegetation structure of warbler habitat. …

Integrating The Jrc Monthly Water History Dataset And Geostatistical Analysis Approach To Quantify Surface Hydrological Connectivity Dynamics In An Ungauged Multi-Lake System, Lili Wu, Yueqing Chen, Guangxin Zhang, Y. Jun Xu, Zhiqiang Tan

Faculty Publications

Determining the dynamics of surface hydrological connectivity in a landscape of multiple lakes with different sizes and depths is challenging. This is especially the case for ungagged, large areas of multi-lake systems. Integrated use of remote sensing and geostatistical analysis can be a useful approach for developing metrics that can be used to identify the hydrological connectivity and their changes. In this study, we conducted a geostatistical analysis of 18 wet and dry binary state rasters derived from Landsat images over a large ungauged multi-lake system, the Momoge National Nature Reserve in Northeast China. Our goal was to investigate applicability …

Applying Spatial Video Geonarratives And Physiological Measurements To Explore Perceived Safety In Baton Rouge, Louisiana, Alina Ristea, Michael Leitner, Bernd Resch, Judith Stratmann

Faculty Publications

Spatial crime analysis, together with perceived (crime) safety analysis have tremendously benefitted from Geographic Information Science (GISc) and the application of geospatial technology. This research study discusses a novel methodological approach to document the use of emerg-ing geospatial technologies to explore perceived urban safety from the lenses of fear of crime or crime perception in the city of Baton Rouge, USA. The mixed techniques include a survey, spatial video geonarrative (SVG) in the field with study participants, and the extraction of moments of stress (MOS) from biosensing wristbands. This study enrolled 46 participants who completed geonarratives and MOS detection. A …

Salt Marsh Elevation Limit Determined After Subsidence From Hydrologic Change And Hydrocarbon Extraction, R. Eugene Turner, Yu Mo

Faculty Publications

Levee construction aboveground and hydrocarbon removal from belowground in coastal wetlands can create hydrologic changes that increase plant stress through flooding. But the significance of the subsidence they cause individually or in combination is contested. This study untangled them to demonstrate elevational limits of salt marshes by studying dredged and natural waterways in two salt marshes in Louisiana, USA. The areas had a homogenous plant cover before drilling for oil and gas extraction peaked in the 1960s, and now are a mixed network of natural waterways and dredged canals used to drill wells with an average drill date of 1965.8 …

Lsu General Catalog 2021-2022, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The LSU General Catalog includes information on registration and financial aid as well as academic services offered to all students.

Datos Preliminares De La Temporada 2019 Del Proyecto De Investigación Arqueológica Cerro San Isidro, Distrito De Moro, Ancash, David Chicoine, Jeisen Navarro

Faculty Publications

No abstract provided.

Illusions Of Emancipation: The Pursuit Of Freedom And Equality In The Twilight Of Slavery, Kathryn Angelica

Civil War Book Review

Joseph P. Reidy, in Illusions of Emancipation: The Pursuit of Freedom and Equality in the Twilight of Slavery, argues for viewing the process of emancipation as complex, uneven, and far reaching. Centering the testimony of formerly enslaved people and their understanding of wartime emancipation, Reidy demonstrates that the end of slavery in the United States took a winding, troubled, and uncertain path.

Biology, Ecology, And Management Of Key Sorghum Insect Pests, Olabimpe O. Okosun, Kerry C. Allen, James P. Glover, Gadi V.P. Reddy

Faculty Publications

Sorghum, Sorghum bicolor L. Moench (Poaceae), is a highly valued crop cultivated worldwide, with the grain and stover being of equal importance in some developing countries. Sorghum can produce high yields even under adverse environmental conditions, however, damage from insect pests at various stages of the plant's development can reduce its productivity, impacting low-income farmers in developing countries. Important sorghum insect pests include leaf-sucking species, leaf-feeding species, stalk or stem borers, pests of the panicle and of the stored grain. Modern control strategies include cultural controls, biological control, pesticides (chemical, botanicals, or microbial), and host plant resistance. An integrated approach …

Assessing Spatial Inequality And Cultural Capital In East Baton Rouge Parish, Louisiana, Tyler Scott

Honors Capstones

No abstract provided.

In The Service Of God And Humanity: Conscience, Reason, And The Mind Of Martin R. Delany, Philip Yaure

Civil War Book Review

Adeleke shows that Delaney was alternatively a separatist, integrationist, militarist, and accommodationist before returning to his previous belief in emigration. Despite his changing methods, a puzzling belief in the power of moral suasion animated all of Delaney’s emancipationist efforts. This puzzlement is indicative of “the success of Adeleke’s project.”

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.

Fourth Semester French: French Language Competency For The Global Work Force, Marion D. Crackower

E-Textbooks

The goal of this curriculum is to help students develop functional proficiency in French. It serves as a conclusion to everything that was learnt the past semesters, and as an introduction to French as a tool for communication. This course is made of 3 parts:

• French for communication in daily life: art and museums, food and restaurants, sports and events, etc.
• Introduction to Francophone literature: France, Belgium, Senegal
• Introduction to professional French: tourism, finance, health, and Law

The skills developed during this semester include:

• the ability to engage in French conversation by asking and answering questions on topics of daily …

Identifying Global Favourable Habitat For Early Juvenile Loggerhead Sea Turtles, C.S. Harrison, J.Y. Luo, N.F. Putman, Q. Li, P. Sheevam, K. Krumhardt, J. Stevens, M.C. Long

Faculty Publications

No abstract provided.

Call-And-Response: Looking Outward From/With Igsa@Nd, Angeletta K.M. Gourdine, Mary Celeste Kearney, Shauna Pomerantz

Faculty Publications

No abstract provided.

Mitochondrial Dna Indicates Paraphyletic Relationships Of Disjunct Populations In The Neotoma Mexicana Species Group, Giovani Hernández-Canchola, Livia León-Paniagua, Jacob A. Esselstyn

Faculty Publications

Woodrats (genus Neotoma) comprise 24 species found primarily in the United States and México. The Neotoma mexicana species group reaches its southernmost distribution in the highlands of southern México and Central America. Previous research suggested that N. mexi-cana has a discontinuous distribution, whereas N. ferruginea and N. picta have allopatric distributions around the lowlands of the Isthmus of Tehuantepec. However, these hypotheses were suggested with incomplete subspecific sampling near the isthmus. We used samples of N. m. parvidens from the Sierra Sur de Oaxaca and N. m. tropicalis from the Sierra Norte de Oaxaca to assess their taxonomic affinity. Our …

Effect Of Hydrological Fluctuation On Nutrient Stoichiometry And Trade-Offs Of Carex Schmidtii, Dongjie Zhang, Qing Qi, Shouzheng Tong, Jim Wang, Mingye Zhang, Guanglei Zhu, Xianguo Lu

Faculty Publications

Nutrient stoichiometry and trade-offs focusing on the mass balance of multiple nutrient elements play important roles in the response mechanism of plants to environmental stresses in wetlands. Nonetheless, little is known about the response dynamics and trade-offs of nutrient elements of wetland plants, especially potassium (K), under hydrological fluctuation conditions. Greenhouse experiments have been undertaken to assess the effects of initial water level (DW), water-level amplitude (AW), lasted time and their interactions on the response processes of nutrient stoichiometry of Carex schmidtii. Plant nutrient trade-offs and limitation were investigated under multiple hydrological fluctuation conditions. Results showed that plant nitrogen (N), …

Active Uplift Of Southern Tibet Revealed, Michael Taylor, Adam Forte, Andrew Laskowski, Lin Ding

Faculty Publications

North of the Himalayas is the Tibetan plateau-the largest physiographic feature on Earth related to intercontinental collision. Here, we study the rugged Gangdese Range along the southern drainage divide of the Tibetan plateau using a synthesis of geologic, thermochronologic, and interseismic geodetic observations that reveal that southern Tibet's Gangdese Range is undergoing active surface uplift at present-day rates rivaling the Himalaya. Uplift has likely been sustained since the early Miocene, and we hypothesize that surface uplift of the Gangdese Mountains led to the development of Tibet's internally drained plateau, as well as potentially reversed the course of the paleo Yarlung …

Content Controlled Spectral Indices For Detection Of Hydrothermal Alteration Minerals Based On Machine Learning And Lasso-Logistic Regression Analysis, Kyuhun Shim, Jaehyung Yu, Lei Wang, Sangin Lee, Sang Mo Koh, Bum Han Lee

Faculty Publications

This article introduced the quantity controlled spectral indices working at mineral contents higher than 5 wt.% for detection of sericite, chlorite, and pyrophyllite, which are the representative alteration minerals of phyllic, propylitic, and advanced argillic hydrothermal alterations. The X-ray diffraction analysis revealed that the samples are mostly pure with minor content of quartz. The absorption features of target minerals showed systematic decrease in absorption depth with decrease in the mineral content, and the changes varied by mineral types. A total of 1253 target mineral spectra and 605 nontarget mineral spectra were classified by a random forest model, which achieved an …

A Short Text Classification Method Based On Convolutional Neural Network And Semantic Extension, Haitao Wang, Keke Tian, Zhengjiang Wu, Lei Wang

Faculty Publications

In order to solve the problem that traditional short text classification methods do not perform well on short text due to the data sparsity and insufficient semantic features, we propose a short text classification method based on convolutional neural network and semantic extension. Firstly, we propose an improved similarity to improve the coverage of the word vector table in the short text preprocessing process. Secondly, we propose a method for semantic expansion of short texts, which adding an attention mechanism to the neural network model to find related words in the short text, and semantic expansion is performed at the …

Salt Marsh Elevation Limit Determined After Subsidence From Hydrologic Change And Hydrocarbon Extraction, R. Eugene Turner, Yu Mo

Faculty Publications

Levee construction aboveground and hydrocarbon removal from belowground in coastal wetlands can create hydrologic changes that increase plant stress through flooding. But the significance of the subsidence they cause individually or in combination is contested. This study untangled them to demonstrate elevational limits of salt marshes by studying dredged and natural waterways in two salt marshes in Louisiana, USA. The areas had a homogenous plant cover before drilling for oil and gas extraction peaked in the 1960s, and now are a mixed network of natural waterways and dredged canals used to drill wells with an average drill date of 1965.8 …

The Evolution Of A Tropical Biodiversity Hotspot, M G. Harvey, G A. Bravo, S Claramunt, A M. Cuervo, M G. Harvey, J Battilana, G F. Seeholzer, J S. Mckay, B C. O'Meara, B C. Faircloth, S V. Edwards, J Perez-Eman, R G. Moyle, F H. Sheldon, A Aleixo, B T. Smith, R T. Chesser, L F. Silveira, J Cracraft, R T. Brumfield, E P. Derryberry

Faculty Publications

The tropics are the source of most biodiversity yet inadequate sampling obscures answers to fundamental questions about how this diversity evolves. We leveraged samples assembled over decades of fieldwork to study diversification of the largest tropical bird radiation, the suboscine passerines. Our phylogeny, estimated using data from 2389 genomic regions in 1940 individuals of 1287 species, reveals that peak suboscine species diversity in the Neotropics is not associated with high recent speciation rates but rather with the gradual accumulation of species over time. Paradoxically, the highest speciation rates are in lineages from regions with low species diversity, which are generally …

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 …

The Effect Of Summer Drought On The Predictability Of Local Extinctions In A Butterfly Metapopulation, Erik Van Bergen, Tad Dallas, Michelle F. Dileo, Aapo Kahilainen, Anniina L.K. Mattila, Miska Luoto, Marjo Saastamoinen

Faculty Publications

© 2020 The Authors. Conservation Biology published by Wiley Periodicals LLC on behalf of Society for Conservation Biology The ecological impacts of extreme climatic events on population dynamics and community composition are profound and predominantly negative. Using extensive data of an ecological model system, we tested whether predictions from ecological models remain robust when environmental conditions are outside the bounds of observation. We observed a 10-fold demographic decline of the Glanville fritillary butterfly (Melitaea cinxia) metapopulation on the Åland islands, Finland in the summer of 2018 and used climatic and satellite data to demonstrate that this year was an anomaly …

World Health Organization 2020 Guidelines On Physical Activity And Sedentary Behaviour, Fiona C. Bull, Salih S. Al-Ansari, Stuart Biddle, Katja Borodulin, Matthew P. Buman, Greet Cardon, Catherine Carty, Jean Philippe Chaput, Sebastien Chastin, Roger Chou, Paddy C. Dempsey, Loretta Dipietro, Ulf Ekelund, Joseph Firth, Christine M. Friedenreich, Leandro Garcia, Muthoni Gichu, Russell Jago, Peter T. Katzmarzyk, Estelle Lambert, Michael Leitzmann, Karen Milton, Francisco B. Ortega, Chathuranga Ranasinghe, Emmanuel Stamatakis, Anne Tiedemann, Richard P. Troiano, Hidde P. Van Der Ploeg, Vicky Wari, Juana F. Willumsen

Population and Public Health Science Faculty Publications

Objectives To describe new WHO 2020 guidelines on physical activity and sedentary behaviour. Methods The guidelines were developed in accordance with WHO protocols. An expert Guideline Development Group reviewed evidence to assess associations between physical activity and sedentary behaviour for an agreed set of health outcomes and population groups. The assessment used and systematically updated recent relevant systematic reviews; new primary reviews addressed additional health outcomes or subpopulations. Results The new guidelines address children, adolescents, adults, older adults and include new specific recommendations for pregnant and postpartum women and people living with chronic conditions or disability. All adults should undertake …

Typing Tornadoes By Storm Mode In The Southeast United States, Marisa R. Karpinski

LSU Master's Theses

Existing work has noted three major, radar-derived, storm modes associated with tornadoes: supercell, quasi-linear convective systems, and tropical systems. I examine the long-term frequency and seasonality of each storm mode between 1996 and 2017 in the Southeast United States. The Southeast is chosen as a focus for this work due to its well-known and unique combination of tornado vulnerability and exposure. Expanding our knowledge of the radar presentation of tornado-producing thunderstorms in this region could assist in the operational interpretation of these events. In this study, a climatology of F/EF1+ tornadoes (1996 - 2017) is generated for the study area …

Function, History, And Ecology In The Exceptional Radiation Of Murine Rodents, Jonathan Allen Nations

LSU Doctoral Dissertations

Life’s diversity is not spread evenly across all lineages, and this unevenness is thought to be due, in part, to a few interwoven factors: biogeographic history, the evolution of successful functional traits, and the ecological opportunity these traits afford. My dissertation focuses on the evolution of a species-rich and morphologically diverse clade of mammals, the murine rodents (Murinae; Muridae; Rodentia) to address 1) morphological adaptations associated with niche transition to arboreality 2) the effect of repeated ecological transitions on murine diversification, and 3) the role of atypical ecological niches in the assembly of hyperdiverse communities. My dissertation has revealed that …

Leave It To The People: Position And Positioning Of Stakeholders In Top-Down Sustainable Development And Risk Reduction Frameworks From Global To Local Levels, Bethany Bille Garfield

LSU Doctoral Dissertations

Dissertation concerning design, contents, priorities, and outcomes of development and disaster risk reduction (DRR) global indicator frameworks. Historical review of United Nations (UN) multilateral agreements and organizational dynamics precedes analysis of indicator data reported for Sustainable Development Goal (SDG) targets shared by the 2015 Paris Agreement and Sendai Framework for Disaster Risk Reduction (SFDRR). Background on the planning of UN frameworks is considered along with results of indicator data analysis to identify actors and processes that steer the focus of frameworks hence influence selection of targets and indicators, and corresponding framework agendas. Fundamental flaws in resolution frameworks preventing global goal …

College Expectation And Matriculation: High School Students Journey To Postsecondary, Sabrina Juanita Johnson

LSU Doctoral Dissertations

Racial group membership and social-economic status (SES) among academically talented students are recognized as powerful predictors of matriculation and college expectations. Moving or transitioning from high school to college is an essential pathway for success in life. Previous research suggests that college enrollment is correlated to resource opportunities available to students that they can access through their relationship with their parents, peers, school staff, teachers, and others.

These relationships are vital in increasing college matriculation by providing academic assistance, emotional support, psychological encouragement, relevant information, and guidance to students in the complex college application process.

College preparatory or outreach programs …

Water-Energy Nexus: Studies On Salinity Gradient Energy Harvest And Desalination, Guangcai Tan

LSU Doctoral Dissertations

Water and energy are fundamentally linked, and both are important for the development of human society. The demand for renewable energy and freshwater are two global challenges in the 21^st century. Herein, a novel chloride-ion (Cl⁻) concentration flow cell (CFC) based on two symmetrical electrodes (BiCl₃, CoCl₂, VCl₃, or BiOCl) separately by a cation-exchange membrane was used as an efficient method to recover salinity gradient (SG) energy. The CFC with metal chloride electrodes (BiCl₃, CoCl₂, and VCl₃) was based on Cl⁻ extraction/insertion, and that …