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Skilled Labor Shortage In Construction: Deep Dive Of Impactful Factors And Influential People Of The Decision-Making Process, Nicholas B. Hardy
Skilled Labor Shortage In Construction: Deep Dive Of Impactful Factors And Influential People Of The Decision-Making Process, Nicholas B. Hardy
LSU Doctoral Dissertations
The skilled labor shortage is well documented from a historical perspective via studies focusing on various construction trades such as carpentry, mechanical, electrical, plumbing, and tile setters. Causes of such shortages such as industry image, college as a preferred choice after high school, and construction being a last resort have been investigated extensively. Consequently, possible solutions ranging from amplifying shop classes in high school to intensifying recruiting efforts for union training programs have all been addressed throughout the last 40 years. However, recent studies have focused on identifying the magnitude and reach of the skilled labor gap while limited attention …
The Hoof Inside Out: A Comprehensive Investigation About The Shoe Configuration Effects On The Behavior Of The Equine Hoof, Rita Aoun
LSU Doctoral Dissertations
The equine hoof is a unique organ in biology that has intricate elastic properties. From simple protection to therapeutic and corrective measures, horseshoes are widely used in the equine industry. Various types of shoeing have been designed and used based on their unique targeted functions following hoof care. Shoes can modify the gait of the horse, affect the alignment of the distal joints, and alter stress and strains on specific hoof regions. The objective of this dissertation is to provide an overview of the available research on the existing methodology and literature on the effects of shoeing on equine gait …
Neural Circuits Expressing The Serotonin 2c Receptor Regulate Memory In Mice And Humans, Hesong Liu, Yang He, Hailan Liu, Bas Brouwers, Na Yin, Katherine Lawler, Julia M. Keogh, Elana Henning, Dong Kee Lee, Meng Yu, Longlong Tu, Nan Zhang, Kristine M. Conde, Junying Han, Zili Yan, Nikolas A. Scarcelli, Lan Liao, Jianming Xu, Qingchun Tong, Hui Zheng, Zheng Sun, Yongjie Yang, Chunmei Wang, Yanlin He, I. Sadaf Farooqi, Yong Xu
Neural Circuits Expressing The Serotonin 2c Receptor Regulate Memory In Mice And Humans, Hesong Liu, Yang He, Hailan Liu, Bas Brouwers, Na Yin, Katherine Lawler, Julia M. Keogh, Elana Henning, Dong Kee Lee, Meng Yu, Longlong Tu, Nan Zhang, Kristine M. Conde, Junying Han, Zili Yan, Nikolas A. Scarcelli, Lan Liao, Jianming Xu, Qingchun Tong, Hui Zheng, Zheng Sun, Yongjie Yang, Chunmei Wang, Yanlin He, I. Sadaf Farooqi, Yong Xu
Division of Basic Science Faculty Publications
Declined memory is a hallmark of Alzheimer’s disease (AD). Experiments in rodents and human postmortem studies suggest that serotonin (5-hydroxytryptamine, 5-HT) plays a role in memory, but the underlying mechanisms are unknown. Here, we investigate the role of 5-HT 2C receptor (5-HT2CR) in regulating memory. Transgenic mice expressing a humanized HTR2C mutation exhibit impaired plasticity of hippocampal ventral CA1 (vCA1) neurons and reduced memory. Further, 5-HT neurons project to and synapse onto vCA1 neurons. Disruption of 5-HT synthesis in vCA1-projecting neurons or deletion of 5-HT2CRs in the vCA1 impairs neural plasticity and memory. We show that a selective 5-HT2CR agonist, …
Pressure And Rate Transient Analyses For Plume Characterization And Storage Capacity Estimation Of Co2 Storage Projects, Mohamed Elnoby Mokhtar Abdelaal
Pressure And Rate Transient Analyses For Plume Characterization And Storage Capacity Estimation Of Co2 Storage Projects, Mohamed Elnoby Mokhtar Abdelaal
LSU Doctoral Dissertations
Reservoir characterization is a key factor for effective management of commercial-scale Geologic CO2 Storage (GCS) projects. Pressure/rate transient analyses (PTA/RTA) have evolved as reliable tools for assessing hydrocarbon and GCS reservoirs. Injection rate and pressure data are routinely measured as a part of GCS projects’ surveillance, or during transient well testing. The data contain valuable information about the subsurface that can be extracted. The extracted information enables the operator to evaluate the effectiveness of injection operations, and to make remedial/corrective interventions. In this current work, different analytical and numerical techniques are presented to characterize, assess, and maximize the economic and …
Emotional Diplomacy From Tel Aviv To Baghdad: Analyzing The Impact Of Emotional Appeals On Social Media Engagement, Soheil Kafiliveyjuyeh
Emotional Diplomacy From Tel Aviv To Baghdad: Analyzing The Impact Of Emotional Appeals On Social Media Engagement, Soheil Kafiliveyjuyeh
LSU Doctoral Dissertations
This study investigates the use of emotional appeals in the diplomatic communication of U.S. ambassadors in the Middle East. In the realm of diplomacy, actors might strategically and deliberately exhibit emotions to shape and control how their nation is perceived internationally. The project's primary objective is to explore the effectiveness of emotional appeals in generating social media interactions with politicians’ and ambassadors’ messages, and in building relationships with their target audience through these engagements. Using three studies, I examine the diplomatic communications of U.S. ambassadors in the Middle East by focusing on their utilization of Twitter/X and emotional diplomacy strategies. …
Understanding Social Impacts Of Major Disruptions From The Perspective Of Destination Access, Manika Rana Bhat
Understanding Social Impacts Of Major Disruptions From The Perspective Of Destination Access, Manika Rana Bhat
LSU Master's Theses
Major disruptions (like public health crises and extreme weather events) significantly impact human mobility and travel patterns. This study investigates the social impacts of major disruptions on human mobility from the perspective of accessing destinations. This study used a large-scale dataset from SafeGraph and focused on analyzing the impacts of COVID-19 and Hurricane Ida on destination access in Louisiana. The findings of the temporal plots indicated that the impact magnitude of Hurricane Ida was much smaller than that of the COVID-19 pandemic but still resulted in hardship on destination access. During COVID-19, it was found that parishes with limited active …
Copper-Based Electrocatalysts For Electrochemical Reduction Of Co2 To C2 Products, Monsuru Olatunji Dauda
Copper-Based Electrocatalysts For Electrochemical Reduction Of Co2 To C2 Products, Monsuru Olatunji Dauda
LSU Master's Theses
The electrochemical reduction of CO2 using copper-based electrocatalysts has emerged as a promising approach for sustainable chemical production, offering a pathway to mitigate the rising atmospheric CO2 levels while generating valuable fuels and chemicals. However, the selectivity and efficiency of copper-based catalysts towards specific C2 products remain a major challenge, hindering their commercial viability. This thesis focuses on the development, characterization, and mechanistic understanding of three promising electrocatalyst systems for multi-carbon product generation from CO2 reduction: copper-phosphide (Cu-P), copper-tin (Cu-Sn), and copper selenide (Cu2Se). A comprehensive investigation of the electrocatalysts was conducted using advanced …
Speculative Telephone: Oral Historians And Digital Librarians On How Libraries Could Be, Kae Kratcha
Speculative Telephone: Oral Historians And Digital Librarians On How Libraries Could Be, Kae Kratcha
Journal of Critical Digital Librarianship
In the summer of 2023, librarian and oral historian Kae Bara Kratcha interviewed three oral historians about their relationships to libraries and their dreams for what digital libraries could be. Then they played portions of each oral historian interview for a digital librarian and asked the librarian to speculate about what their jobs and lives would be like if they implemented the oral historians' ideas about digital libraries. “Speculative Telephone: Oral Historians and Digital Librarians on How Libraries Could Be” is eleven edited audio tracks of wide-ranging conversation on topics like public space, online communities, library anxiety, relationships with library …
Birefringence Tests Of Gravity With Multimessenger Binaries, Macarena Lagos, Leah Jenks, Maximiliano Isi, Kenta Hotokezaka, Brian D. Metzger, Eric Burns, Will M. Farr, Scott Perkins, Kaze W.K. Wong, Nicolás Yunes
Birefringence Tests Of Gravity With Multimessenger Binaries, Macarena Lagos, Leah Jenks, Maximiliano Isi, Kenta Hotokezaka, Brian D. Metzger, Eric Burns, Will M. Farr, Scott Perkins, Kaze W.K. Wong, Nicolás Yunes
Faculty Publications
Extensions to general relativity allow the polarization of gravitational waves (GW) from astrophysical sources to suffer from amplitude and velocity birefringence, which respectively induce changes in the ellipticity and orientation of the polarization tensor. We introduce a multimessenger approach to test this polarization behavior of GWs during their cosmological propagation using binary sources, for which the initial polarization is determined by the inclination and orientation angles of the orbital angular momentum vector with respect to the line of sight. In particular, we use spatially resolved radio imaging of the jet from a binary neutron star (BNS) merger to constrain the …
Desire Paths In The Information Landscape, Victoria Van Hyning, Mason A. Jones, Travis Wagner
Desire Paths In The Information Landscape, Victoria Van Hyning, Mason A. Jones, Travis Wagner
Journal of Critical Digital Librarianship
Libraries and archives serve so many different users who come to information institutions with various perspectives, needs, experiences, and desires around accessing physical or digital collections. While our users may find what they are looking for immediately, many have to beat their own paths through complex systems and metadata that doesn’t align with their needs. Their search strategies may leave digital “desire paths”–alternative routes through the information landscape that can show us how to better meet their needs. This article covers three scenarios where users’ desire paths can be seen or where gaps around user experience can be better addressed. …
A Microfluidic Approach To Study Variations In Chlamydomonas Reinhardtii Alkaline Phosphatase Activity In Response To Phosphate Availability, Alireza Rahnama, Manibarathi Vaithiyanathan, Luis Briceno-Mena, Travis M. Dugas, Kelly L. Yates, Jose A. Romagnoli, Adam T. Melvin
A Microfluidic Approach To Study Variations In Chlamydomonas Reinhardtii Alkaline Phosphatase Activity In Response To Phosphate Availability, Alireza Rahnama, Manibarathi Vaithiyanathan, Luis Briceno-Mena, Travis M. Dugas, Kelly L. Yates, Jose A. Romagnoli, Adam T. Melvin
Faculty Publications
Algal growth depends strongly on phosphorus (P) as a key nutrient, underscoring the significance of monitoring P levels. Algal species display a sensitive response to fluctuations in P availability, notably through the expression of alkaline phosphatase (AP) when challenged with P-depletion. As such, alkaline phosphatase activity (APA) serves as a valuable metric for P availability, offering insights into how algae utilize and fix available P resources. However, current APA quantification methods lack single cell resolution, while also being time- and reagent consuming. Microfluidics offers a promising cost-effective solution to these limitations, providing a platform for precise single-cell analysis. In this …
Patterns Of Marsh Surface Accretion Rates Along Salinity And Hydroperiod Gradients Between Active And Inactive Coastal Deltaic Floodplains, Andy F. Cassaway, Robert R. Twilley, Andre S. Rovai, Gregg A. Snedden
Patterns Of Marsh Surface Accretion Rates Along Salinity And Hydroperiod Gradients Between Active And Inactive Coastal Deltaic Floodplains, Andy F. Cassaway, Robert R. Twilley, Andre S. Rovai, Gregg A. Snedden
Faculty Publications
High subsidence rates are inherent to coastal deltas worldwide, contributing to rapid rates of relative sea-level rise and compromising the sustainability of coastal wetlands. Different parts of river deltas, however, experience accretion or erosion, depending on the coupling between ecological and morphological processes. Wetland expansion occurs in active deltaic coastal basins that are connected to riverine sedimentation. In contrast, wetland degradation occurs in inactive deltaic coastal basins where river engineering strategies associated with flood control restrict river connectivity. Here, we investigated the relative role of inorganic and organic loading to marsh accretion rates spanning fresh to brackish to saline zones …
Stormwater Treatment Areas Of The Florida Everglades Ecosystem: Science And Applications – Everglades Stas Special Issue, K. R. Reddy, C. Armstrong, M. J. Chimney, R. T. James, J. R. White
Stormwater Treatment Areas Of The Florida Everglades Ecosystem: Science And Applications – Everglades Stas Special Issue, K. R. Reddy, C. Armstrong, M. J. Chimney, R. T. James, J. R. White
Faculty Publications
Managed treatment wetlands technology is now used around the world to treat wastewater and stormwater by removing nutrients and other contaminants to obtain a desired water quality. In this paper we present a brief review of a large-scale application of the nature-based technology known as stormwater treatment areas (STAs). These STAs were constructed to treat agricultural and urban runoff to reduce outflow total phosphorus (TP) concentrations to < 20 μg P L−1, which is required to protect downstream water quality and preserve the remaining Everglades ecosystem. Five STAs with a total area of approximately 25,000 ha were built at strategic locations to reduce …
Recycling Functional Fillers From Waste Tires For Tailored Polystyrene Composites: Mechanical, Fire Retarding, Electromagnetic Field Shielding, And Acoustic Insulation Properties—A Short Review, Jinlong Zhang, Hang Liu, Shyam S. Sablani, Qinglin Wu
Recycling Functional Fillers From Waste Tires For Tailored Polystyrene Composites: Mechanical, Fire Retarding, Electromagnetic Field Shielding, And Acoustic Insulation Properties—A Short Review, Jinlong Zhang, Hang Liu, Shyam S. Sablani, Qinglin Wu
Faculty Publications
Polymer waste is currently a big and challenging issue throughout the world. Waste tires represent an important source of polymer waste. Therefore, it is highly desirable to recycle functional fillers from waste tires to develop composite materials for advanced applications. The primary theme of this review involves an overview of developing polystyrene (PS) composites using materials from recycled tires as fillers; waste tire recycling in terms of ground tire rubbers, carbon black, and textile fibers; surface treatments of the fillers to optimize various composite properties; and the mechanical, fire retarding, acoustic, and electromagnetic field (EMI) shielding performances of PS composite …
Hepatic Interoception In Health And Disease, Hans Rudolf Berthoud, Heike Münzberg, Christopher D. Morrison, Winfried L. Neuhuber
Hepatic Interoception In Health And Disease, Hans Rudolf Berthoud, Heike Münzberg, Christopher D. Morrison, Winfried L. Neuhuber
Division of Basic Science Faculty Publications
The liver is a large organ with crucial functions in metabolism and immune defense, as well as blood homeostasis and detoxification, and it is clearly in bidirectional communication with the brain and rest of the body via both neural and humoral pathways. A host of neural sensory mechanisms have been proposed, but in contrast to the gut-brain axis, details for both the exact site and molecular signaling steps of their peripheral transduction mechanisms are generally lacking. Similarly, knowledge about function-specific sensory and motor components of both vagal and spinal access pathways to the hepatic parenchyma is missing. Lack of progress …
Associations Between Daily Step Count Classifications And Continuous Glucose Monitoring Metrics In Adults With Type 1 Diabetes: Analysis Of The Type 1 Diabetes Exercise Initiative (T1dexi) Cohort, Lauren V. Turner, Martin Chase Marak, Robin L. Gal, Peter Calhoun, Zoey Li, Peter G. Jacobs, Mark A. Clements, Corby K. Martin, Francis J. Doyle, Susana R. Patton, Jessica R. Castle, Melanie B. Gillingham, Roy W. Beck, Michael R. Rickels, Michael C. Riddell
Associations Between Daily Step Count Classifications And Continuous Glucose Monitoring Metrics In Adults With Type 1 Diabetes: Analysis Of The Type 1 Diabetes Exercise Initiative (T1dexi) Cohort, Lauren V. Turner, Martin Chase Marak, Robin L. Gal, Peter Calhoun, Zoey Li, Peter G. Jacobs, Mark A. Clements, Corby K. Martin, Francis J. Doyle, Susana R. Patton, Jessica R. Castle, Melanie B. Gillingham, Roy W. Beck, Michael R. Rickels, Michael C. Riddell
Clinical Research Faculty Publications
Aims/hypothesis: Adults with type 1 diabetes should perform daily physical activity to help maintain health and fitness, but the influence of daily step counts on continuous glucose monitoring (CGM) metrics are unclear. This analysis used the Type 1 Diabetes Exercise Initiative (T1DEXI) dataset to investigate the effect of daily step count on CGM-based metrics. Methods: In a 4 week free-living observational study of adults with type 1 diabetes, with available CGM and step count data, we categorised participants into three groups—below (< 7000), meeting (7000–10,000) or exceeding (>10,000) the daily step count goal—to determine if step count category influenced CGM metrics, including per cent time …
Recovery Of The X-Ray Polarisation Of Swift J1727.8-1613 After The Soft-To-Hard Spectral Transition, J. Podgorný, J. Svoboda, M. Dovčiak, A. Veledina, J. Poutanen, P. Kaaret, S. Bianchi, A. Ingram, F. Capitanio, S. R. Datta, E. Egron, H. Krawczynski, G. Matt, F. Muleri, P. O. Petrucci, T. D. Russell, J. F. Steiner, N. Bollemeijer, M. Brigitte, N. Castro Segura, R. Emami, J. A. García, K. Hu, M. N. Iacolina, V. Kravtsov, L. Marra, G. Mastroserio, T. Muñoz-Darias, E. Nathan, M. Negro, A. Ratheesh, N. Rodriguez Cavero, R. Taverna
Recovery Of The X-Ray Polarisation Of Swift J1727.8-1613 After The Soft-To-Hard Spectral Transition, J. Podgorný, J. Svoboda, M. Dovčiak, A. Veledina, J. Poutanen, P. Kaaret, S. Bianchi, A. Ingram, F. Capitanio, S. R. Datta, E. Egron, H. Krawczynski, G. Matt, F. Muleri, P. O. Petrucci, T. D. Russell, J. F. Steiner, N. Bollemeijer, M. Brigitte, N. Castro Segura, R. Emami, J. A. García, K. Hu, M. N. Iacolina, V. Kravtsov, L. Marra, G. Mastroserio, T. Muñoz-Darias, E. Nathan, M. Negro, A. Ratheesh, N. Rodriguez Cavero, R. Taverna
Faculty Publications
We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.8-1613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (IXPE). This is the first detection of X-ray polarisation at the transition from the soft to the hard state in an X-ray binary. We find an averaged 2- 8 keV polarisation degree of (3.3 ± 0.4)% and a corresponding polarisation angle of 3 ±4, which matches the polarisation detected during the rising stage of the outburst, in September- October 2023, within 1σuncertainty. The observational campaign complements previous studies of this source and enables …
Nutritive Value And Forage Accumulation Of A Black Oat Germplasm In The Northeastern United States, David M. Jaramillo, Kathy Soder, Ann Blount, Jose C.B. Dubeux, Stephen Harrison
Nutritive Value And Forage Accumulation Of A Black Oat Germplasm In The Northeastern United States, David M. Jaramillo, Kathy Soder, Ann Blount, Jose C.B. Dubeux, Stephen Harrison
Faculty Publications
Black oat (Avena strigosa Schreb.) might be an attractive forage species in the northeastern United States, since it is generally more heat tolerant and disease resistant than other cool-season grasses. Black oat is currently recommended for fall and winter production in USDA Plant Hardiness ones 8b–10a, which is beyond the northeastern United States (Zones 2a–6a). The objective was to evaluate 10 black oat breeding lines (referred to as “UF1” through “UF10”) for forage accumulation, crude protein (CP), neutral detergent fiber (aNDF), acid detergent fiber (ADF), and in vitro digestible organic matter (IVDOM) concentrations. The experiment was carried out in April–July …
Targeting Cancers With Ohsv-Based Oncolytic Viral Immunotherapy, Rakin Tammam Nasar, Ifeanyi Kingsley Uche, Konstantin G. Kousoulas
Targeting Cancers With Ohsv-Based Oncolytic Viral Immunotherapy, Rakin Tammam Nasar, Ifeanyi Kingsley Uche, Konstantin G. Kousoulas
Faculty Publications
The recent success of cancer immunotherapies, such as immune checkpoint inhibitor (ICIs), monoclonal antibodies (mAbs), cancer vaccines, and adoptive cellular therapies (ACTs), has revolutionized traditional cancer treatment. However, these immunotherapeutic modalities have variable efficacies, and many of them exhibit adverse effects. Oncolytic viral Immunotherapy (OViT), whereby viruses are used to directly or indirectly induce anti-cancer immune responses, is emerging as a novel immunotherapy for treating patients with different types of cancer. The herpes simplex virus type-1 (HSV-1) possesses many characteristics that inform its use as an effective OViT agents and remains a leading candidate. Its recent clinical success resulted in …
Stacked Noise Reduction Auto Encoder–Ocean: A Novel Personalized Recommendation Model Enhanced, Bixi Wang, Wenfeng Zheng, Ruiyang Wang, Siyu Lu, Lirong Yin, Lei Wang, Zhengtong Yin, Xinbing Chen
Stacked Noise Reduction Auto Encoder–Ocean: A Novel Personalized Recommendation Model Enhanced, Bixi Wang, Wenfeng Zheng, Ruiyang Wang, Siyu Lu, Lirong Yin, Lei Wang, Zhengtong Yin, Xinbing Chen
Faculty Publications
With the continuous development of information technology and the rapid increase in new users of social networking sites, recommendation technology is becoming more and more important. After research, it was found that the behavior of users on social networking sites has a great correlation with their personalities. The five characteristics of the OCEAN personality model can cover all aspects of a user’s personality. In this research, a micro-directional propagation model based on the OCEAN personality model and a Stacked Denoising Auto Encoder (SDAE) was built through the application of deep learning to a collaborative filtering technique. Firstly, the dimension of …
Thermochromic Yarns’ Application In Fever Detection For Young Children, Sibei Xia, Chuanlan Liu, Yanbo Zhang, Bruce Cameron
Thermochromic Yarns’ Application In Fever Detection For Young Children, Sibei Xia, Chuanlan Liu, Yanbo Zhang, Bruce Cameron
Faculty Publications
The existing literature emphasizes the significance of and needs for developing body temperature monitoring devices that can consistently and discreetly assess the temperatures of young children. Such products could offer a method to check children’s body temperature and alleviate parents’ concerns over fever. However, research gaps and challenges exist in preserving material flexibility, conducting tests in a controlled setting that mimics body temperature, and investigating consumer perceptions of this type of functional textile product. Therefore, this research aimed to investigate functional textiles using thermochromic yarns for young children’s body temperature detection, particularly focusing on testing prototypes in a controlled environment …
Machine Learning Assisted Design And Optimization Of Plate-Lattice Structures With Superior Specific Recovery Force, Amir Teimouri, Adithya Challapalli, John Konlan, Guoqiang Li
Machine Learning Assisted Design And Optimization Of Plate-Lattice Structures With Superior Specific Recovery Force, Amir Teimouri, Adithya Challapalli, John Konlan, Guoqiang Li
Faculty Publications
In load carrying structures and devices, there is a growing need for shape memory polymer (SMP) metamaterials that are lightweight and have superior strength, remarkable flexibility, and substantial specific recovery force (SFR). One of the challenges is to find optimum lightweight structures with high SFR. To address this challenge, we propose a novel inverse design framework to design plate-lattice structures (PLSs) with user-defined optimum specific maximum compression strength. Consisting of three sub-frameworks, the performance of the inverse design framework was validated before it was utilized to optimize PLSs. The optimum PLSs developed are fabricated with 3D printing using a novel …
Borehole-Based Interval Kriging For 3d Lithofacies Modeling, Yuqi Song, Frank T.C. Tsai
Borehole-Based Interval Kriging For 3d Lithofacies Modeling, Yuqi Song, Frank T.C. Tsai
Faculty Publications
Developing a three-dimensional (3D) lithofacies model from boreholes is critical for providing a coherent understanding of complex subsurface geology, which is essential for groundwater studies. This study aims to introduce a new geostatistical method—interval kriging—to efficiently conduct 3D borehole-based lithological modeling with sand/non-sand binary indicators. Interval kriging is a best linear unbiased estimator for irregular interval supports. Interval kriging considers 3D anisotropies between two orthogonal components—a horizontal plane and a vertical axis. A new 3D interval semivariogram is developed. To cope with the nonconvexity of estimation variance, the minimization of estimation variance is regulated with an additional regularization term. The …
Estimation Of Land Displacement In East Baton Rouge Parish, Louisiana, Using Insar: Comparisons With Gnss And Machine Learning Models, Ahmed Abdalla, Siavash Shami, Mohammad Amin Shahriari, Mahdi Khoshlahjeh Azar
Estimation Of Land Displacement In East Baton Rouge Parish, Louisiana, Using Insar: Comparisons With Gnss And Machine Learning Models, Ahmed Abdalla, Siavash Shami, Mohammad Amin Shahriari, Mahdi Khoshlahjeh Azar
Faculty Publications
Subsidence in southeastern Louisiana is a significant geological issue caused by natural and human-induced factors like low-lying topography and groundwater pumping. Human activities also led to coastal land loss and reduced sediment supply. Satellite-based technologies such as Global Navigation Satellite Systems (GNSS) and Interferometric Synthetic Aperture Radar (InSAR) are used to monitor subsidence. Louisiana has about 130 continuously operating reference stations (CORS) monitoring subsidence statewide. GNSS provides accurate point measurements but limited spatial coverage. InSAR, however, detects ground deformation over large areas using satellite-based radar imagery. In response to this advantage, we employed Sentinel-1 SAR images from 2017 to 2021 …
Corrigendum To “So Fresh, So Clean: Cloud Forensic Analysis Of The Amazon Irobot Roomba Vacuum” [Fsidi 48 (2024) 301686] (Forensic Science International: Digital Investigation (2024) 48(S), (S2666281723002056), (10.1016/J.Fsidi.2023.301686)), Abdur Rahman Onik, Ruba Alsmadi, Ibrahim Baggili, Andrew M. Webb
Corrigendum To “So Fresh, So Clean: Cloud Forensic Analysis Of The Amazon Irobot Roomba Vacuum” [Fsidi 48 (2024) 301686] (Forensic Science International: Digital Investigation (2024) 48(S), (S2666281723002056), (10.1016/J.Fsidi.2023.301686)), Abdur Rahman Onik, Ruba Alsmadi, Ibrahim Baggili, Andrew M. Webb
Faculty Publications
The authors regret to inform that there were errors in Fig. 3c and 3 d as published. It was later discovered that the figures included were incorrect. We extend our sincerest apologies for the oversight and appreciate the opportunity to correct these figures. The mistake was unintentional and occurred during the final revision process. We are committed to learning from this experience. Below are the corrected versions of Fig. 3c and 3 d, presented side by side for comparison.[Formula presented][Formula presented]
Leveraging Designed Simulations And Machine Learning To Develop A Surrogate Model For Optimizing The Gas–Downhole Water Sink–Assisted Gravity Drainage (Gdws-Agd) Process To Improve Clean Oil Production, Watheq J. Al-Mudhafar, Dandina N. Rao, Andrew K. Wojtanowicz
Leveraging Designed Simulations And Machine Learning To Develop A Surrogate Model For Optimizing The Gas–Downhole Water Sink–Assisted Gravity Drainage (Gdws-Agd) Process To Improve Clean Oil Production, Watheq J. Al-Mudhafar, Dandina N. Rao, Andrew K. Wojtanowicz
Faculty Publications
The Gas and Downhole Water Sink–Assisted Gravity Drainage (GDWS-AGD) process addresses gas flooding limitations in reservoirs surrounded by infinite-acting aquifers, particularly water coning. The GDWS-AGD technique reduces water cut in oil production wells, improves gas injectivity, and optimizes oil recovery, especially in reservoirs with high water coning. The GDWS-AGD process installs two 7-inch production casings bilaterally. Then, two 2-3/8-inch horizontal tubings are completed. One tubing produces oil above the oil–water contact (OWC) area, while the other drains water below it. A hydraulic packer in the casing separates the two completions. The water sink completion uses a submersible pump to prevent …
Modeling And Forecasting Cyanobacterial Harmful Algal Blooms (Cyanohabs) In Lake Pontchartrain, Shekhar Mahat
Modeling And Forecasting Cyanobacterial Harmful Algal Blooms (Cyanohabs) In Lake Pontchartrain, Shekhar Mahat
LSU Master's Theses
Harmful algal blooms (HABs) frequently occur in coastal waters worldwide, adversely affecting economies, human health, aquatic ecosystems, and recreational activities. Lake Pontchartrain, an oligohaline estuary, experienced frequent HABs from 2018 to 2023. While NOAA’s NCCOS and USEPA’s CyAN currently monitor cyanobacteria harmful algal blooms (CyanoHABs) in coastal, freshwater, and riverine systems, there is a notable lack of systems monitoring phycocyanin concentrations in the lake. This thesis utilizes satellite remote sensing environmental stressors to model and predict CyanoHABs in Lake Pontchartrain using machine learning techniques. A key focus of this study is assessing the forecasting capabilities of the random forest method …
Hydrometeorological Drivers Of The 2023 Louisiana Water Crisis, P. W. Miller, M. Hiatt
Hydrometeorological Drivers Of The 2023 Louisiana Water Crisis, P. W. Miller, M. Hiatt
Faculty Publications
During summer and fall 2023, Louisiana experienced a historic local drought while dry conditions elsewhere in the central US withheld vital runoff from the Mississippi River, leading to below-normal discharge into the Gulf of Mexico. Thus, by late October 2023, Louisiana was gripped by two super-imposed water crises: a severe local drought and saltwater contamination in the Mississippi River channel. This study frames the development of the water emergency through the lens of flash drought using the Evaporative Demand Drought Index (EDDI). The EDDI shows south Louisiana experience a flash drought during June 2023, while the Mississippi River basin was …
Top-Down Control Of Ammonia Oxidizers By Grazing In The North Pacific, Silin Ni, Min Nina Xu, Moge Du, Edward A. Laws, Shuh Ji Kao
Top-Down Control Of Ammonia Oxidizers By Grazing In The North Pacific, Silin Ni, Min Nina Xu, Moge Du, Edward A. Laws, Shuh Ji Kao
Faculty Publications
The impact of grazing pressure on ammonia oxidizers (AO) has never been quantified in the field. Here we develop a new method to quantify the grazing rates on AO in aquatic systems. We introduce 15NH4+ tracer into the traditional dilution experiments to measure AO's apparent growth rates by using the end-product of 15NH4+ oxidation, that is, 15NOx−. Field studies in the North Pacific revealed that 15NOx− in the end-product was sensitive enough to detect AO's grazing rates. Experiments from the lower euphotic zone showed NH4+ replete growth rates of 0.40 …
Farmer's Adaptive Capacity And Adoption Of Strategies To Climate Change Among Mountain Communities In Nepal, Tanvir Hossain
Farmer's Adaptive Capacity And Adoption Of Strategies To Climate Change Among Mountain Communities In Nepal, Tanvir Hossain
LSU Master's Theses
Climate change presents significant challenges to agriculture worldwide, particularly where farming is central to livelihoods. This phenomenon has been linked to decreasing crop yields due to rising temperatures and reduced rainfall, particularly affecting low-income countries with limited adaptive capabilities. Grasping how farmers perceive climate change is essential for developing effective adaptation strategies to lessen its adverse impacts. This study concentrated on investigating the perceptions and adaptive strategies employed by smallholder farmers in Nepal's Mustang district, utilizing primary data sources. Data from 131 randomly selected households were gathered through structured interviews, while focus group discussions provided qualitative insights into farmers' views …