Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1261 - 1290 of 15703

Full-Text Articles in Entire DC Network

Reduction Of Sparc Protects Mice Against Nlrp3 Inflammasome Activation And Obesity, Seungjin Ryu, Olga Spadaro, Sviatoslav Sidorov, Aileen H. Lee, Sonia Caprio, Christopher Morrison, Steven R. Smith, Eric Ravussin, Irina Shchukina, Maxim N. Artyomov, Yun Hee Youm, Vishwa Deep Dixit Aug 2023

Reduction Of Sparc Protects Mice Against Nlrp3 Inflammasome Activation And Obesity, Seungjin Ryu, Olga Spadaro, Sviatoslav Sidorov, Aileen H. Lee, Sonia Caprio, Christopher Morrison, Steven R. Smith, Eric Ravussin, Irina Shchukina, Maxim N. Artyomov, Yun Hee Youm, Vishwa Deep Dixit

Division of Basic Science Faculty Publications

The comprehensive assessment of long-term effects of reducing intake of energy (CALERIE-II; NCT00427193) clinical trial established that caloric restriction (CR) in humans lowers inflammation. The identity and mechanism of endogenous CR-mimetics that can be deployed to control obesity-associated inflammation and diseases are not well understood. Our studies have found that 2 years of 14% sustained CR in humans inhibits the expression of the matricellular protein, secreted protein acidic and rich in cysteine (SPARC), in adipose tissue. In mice, adipose tissue remodeling caused by weight loss through CR and low-protein diet feeding decreased, while high-fat diet–induced (HFD-induced) obesity increased SPARC expression …

Go to article

Black Experiences With Community Gardening In Southeast Louisiana, Kiarah Craft Aug 2023

Black Experiences With Community Gardening In Southeast Louisiana, Kiarah Craft

LSU Master's Theses

Community gardens have been rising in popularity over the past few years (Mayers, 2023). In response to the COVID-19 pandemic, many people across the United States have decided that it is crucial to grow their own food and develop sustainability within their community. Historically, Black communities have been underserved and ignored, especially in relation to food security and community safety (White, 2019, Penniman, 2018). The purpose of this study was to collect information about the effects of community-based gardening programs on Black people in Southeast Louisiana. Additionally, the researcher would like to gain knowledge regarding the reasons that Black people …

Go to article

Computational Investigations Of The Water Structure At The Α-Al2o3(0001)-Water Interface, Xiaoliu Zhang, Christopher G. Arges, Revati Kumar Aug 2023

Computational Investigations Of The Water Structure At The Α-Al2o3(0001)-Water Interface, Xiaoliu Zhang, Christopher G. Arges, Revati Kumar

Faculty Publications

The α-Al2O3(0001)-water interface is investigated using ab initio molecular dynamics (AIMD) simulations. The spectral signatures of the vibrational sum frequency generation (vSFG) spectra of OH stretching mode for water molecules at the interface are related to the interfacial water orientation, hydrogen bond network, and water dissociation process at different water/alumina interfaces. Significant differences are found between alumina surfaces at different hydroxylation levels, namely, Al-terminated and O-terminated α-Al2O3(0001). By calculating the vibrational sum frequency generation spectrum and its imaginary component from AIMD results, the structure of interfacial waters as well as the termination of alumina slab are related to the spectral …

Go to article

An Occupant-Centric Energy Modeling And Simulation In Office Buildings, Seddigheh Norouziasl Aug 2023

An Occupant-Centric Energy Modeling And Simulation In Office Buildings, Seddigheh Norouziasl

LSU Doctoral Dissertations

Building energy use is highly sensitive to occupants’ energy-related behaviors, including their presence and interaction with different building systems. Modeling and simulation of occupants’ energy-related behavior play an essential role in accurately predicting building energy consumption. Simplifying occupancy parameters in building performance simulation tools can lead to discrepancies between the simulated and actual building energy performance. The main goal of this research is to simulate the occupants’ energy-related behavior in office buildings and utilize the occupancy data to accurately predict building energy performance. Our objective is to increase building energy efficiency and reduce energy consumption while ensuring occupants' comfort, especially …

Go to article

On The Evaluation Of Entropy Threshold For Debonding During Crack Prorogation Using Dic Technique, A. Mahmoudi, M. R. Khosravani, M. M. Khonsari, Tamara Reinicke Aug 2023

On The Evaluation Of Entropy Threshold For Debonding During Crack Prorogation Using Dic Technique, A. Mahmoudi, M. R. Khosravani, M. M. Khonsari, Tamara Reinicke

Faculty Publications

The accumulated entropy at the crack tip of a semi-circular bending (SCB) specimen is investigated to obtain a threshold for material fracture and interatomic debonding. The presented approach uses the experimental data obtained from the Digital Image Correlation (DIC) technique and strain maps superposed to SCB specimens to measure the plastic flow at the crack tip. The Swift strain hardening model is utilized to calculate the stress domain at the crack tip and, consequently, the plastic strain energy and entropy accumulation. Results show that the crack surface propagates when the generated entropy at the crack tip reaches a critical limit. …

Go to article

Metabolomic Evenness Underlies Intraspecific Differences Among Lineages Of A Wetland Grass, Ana L. Salgado, Andrea E. Glassmire, Brian E. Sedio, Rodrigo Diaz, Michael J. Stout, Jan Čuda, Petr Pyšek, Laura A. Meyerson, James T. Cronin Aug 2023

Metabolomic Evenness Underlies Intraspecific Differences Among Lineages Of A Wetland Grass, Ana L. Salgado, Andrea E. Glassmire, Brian E. Sedio, Rodrigo Diaz, Michael J. Stout, Jan Čuda, Petr Pyšek, Laura A. Meyerson, James T. Cronin

Faculty Publications

The metabolome represents an important functional trait likely important to plant invasion success, but we have a limited understanding of whether the entire metabolome or targeted groups of compounds confer an advantage to invasive as compared to native taxa. We conducted a lipidomic and metabolomic analysis of the cosmopolitan wetland grass Phragmites australis. We classified features into metabolic pathways, subclasses, and classes. Subsequently, we used Random Forests to identify informative features to differentiate five phylogeographic and ecologically distinct lineages: European native, North American invasive, North American native, Gulf, and Delta. We found that lineages had unique phytochemical fingerprints, although there …

Go to article

Roles Of Reservoirs In Regulating Basin Flood And Droughts Risks Under Climate Change: Historical Assessment And Future Projection, Jingxuan Sun, Wei Chen, Boting Hu, Y. Jun Xu, Guangxin Zhang, Yanfeng Wu, Baojun Hu, Zheng Song Aug 2023

Roles Of Reservoirs In Regulating Basin Flood And Droughts Risks Under Climate Change: Historical Assessment And Future Projection, Jingxuan Sun, Wei Chen, Boting Hu, Y. Jun Xu, Guangxin Zhang, Yanfeng Wu, Baojun Hu, Zheng Song

Faculty Publications

Study region: Nenjiang River Basin (NRB), Northeast China. Study focus: Water safety management and sustainable development planning increasingly seek to incorporate the impact of reservoirs on downstream floods and droughts; while the effectiveness of reservoir operation in regulating flood and drought risks under climate change has not been assessed extensively. We focus on discerning whether and to what extent reservoirs can mitigate the risk of hydrologic extremes from the perspective of historical and future climate change. New hydrological insight for the region: We found that coupling reservoir operations into basin hydrological simulation can efficiently improve model capacity to capture both …

Go to article

Longitudinal Assessment Of Cognitive Function In The Appswe/Ps1de9 Mouse Model Of Alzheimer's-Related Beta-Amyloidosis, Paul L. Soto, Michael E. Young, Giuliana M. Dimarco, Brianna George, Tatiana Melnikova, Alena V. Savonenko, Breanna N. Harris Aug 2023

Longitudinal Assessment Of Cognitive Function In The Appswe/Ps1de9 Mouse Model Of Alzheimer's-Related Beta-Amyloidosis, Paul L. Soto, Michael E. Young, Giuliana M. Dimarco, Brianna George, Tatiana Melnikova, Alena V. Savonenko, Breanna N. Harris

Faculty Publications

Preclinical models of Alzheimer's disease (AD)-related cognitive decline can be useful for developing therapeutics. The current study longitudinally assessed short-term memory, using a delayed matching-to-position (DMTP) task, and attention, using a 3-choice serial reaction time (3CSRT) task, from approximately 18 weeks of age through death or 72 weeks of age in APPswe/PS1dE9 mice, a widely used mouse model of AD-related amyloidosis. Both transgenic (Tg) and non-Tg mice exhibited improvements in DMTP accuracy over time. Breaks in testing reduced DMTP accuracy but accuracy values quickly recovered in both Tg and non-Tg mice. Both Tg and non-Tg mice exhibited high accuracy in …

Go to article

The Vagus Nerve Mediates Gut-Brain Response To Duodenal Nutrient Administration, Robert C. Ross, Yanlin He, R. Leigh Townsend, Philip R. Schauer, Hans Rudolph Berthoud, Christopher D. Morrison, Vance L. Albaugh Aug 2023

The Vagus Nerve Mediates Gut-Brain Response To Duodenal Nutrient Administration, Robert C. Ross, Yanlin He, R. Leigh Townsend, Philip R. Schauer, Hans Rudolph Berthoud, Christopher D. Morrison, Vance L. Albaugh

Division of Basic Science Faculty Publications

Background: Obesity contributes significant disease burden worldwide, including diabetes, cardiovascular disease, and cancer. While bariatric surgery is the most effective and durable obesity treatment, the mechanisms underlying its effects remain unknown. Although neuro-hormonal mechanisms have been suspected to mediate at least some of the gut-brain axis changes following bariatric surgery, studies examining the intestine and its regionally specific post-gastric alterations to these signals remain unclear. Materials and methods: Vagus nerve recording was performed following the implantation of duodenal feeding tubes in mice. Testing conditions and measurements were made under anesthesia during baseline, nutrient or vehicle solution delivery, and post-delivery. Solutions …

Go to article

Gdf15 Mediates The Effect Of Skeletal Muscle Contraction On Glucose-Stimulated Insulin Secretion, Hui Zhang, Anny Mulya, Stephan Nieuwoudt, Bolormaa Vandanmagsar, Ruth Mcdowell, Elizabeth C. Heintz, Elizabeth R.M. Zunica, J. Jason Collier, Nadejda Bozadjieva-Kramer, Randy J. Seeley, Christopher L. Axelrod, John P. Kirwan Aug 2023

Gdf15 Mediates The Effect Of Skeletal Muscle Contraction On Glucose-Stimulated Insulin Secretion, Hui Zhang, Anny Mulya, Stephan Nieuwoudt, Bolormaa Vandanmagsar, Ruth Mcdowell, Elizabeth C. Heintz, Elizabeth R.M. Zunica, J. Jason Collier, Nadejda Bozadjieva-Kramer, Randy J. Seeley, Christopher L. Axelrod, John P. Kirwan

Division of Basic Science Faculty Publications

Exercise is a first-line treatment for type 2 diabetes and preserves b-cell function by hitherto unknown mechanisms. We postulated that proteins fromcontracting skeletalmuscle may act as cellular signals to regulate pancreatic b-cell function. We used electric pulse stimulation (EPS) to induce contraction in C2C12myotubes and found that treatment of b-cells with EPS-conditioned medium enhanced glucose-stimulated insulin secretion (GSIS). Transcriptomics and subsequent targeted validation revealed growth differentiation factor 15 (GDF15) as a central component of the skeletal muscle secretome. Exposure to recombinant GDF15 enhanced GSIS in cells, islets, andmice. GDF15 enhanced GSIS by upregulating the insulin secretion pathway in b-cells,whichwas abrogated …

Go to article

Residual-Based Error Correction For Neural Operator Accelerated Infinite-Dimensional Bayesian Inverse Problems, Lianghao Cao, Thomas O'Leary-Roseberry, Prashant K. Jha, J. Tinsley Oden, Omar Ghattas Aug 2023

Residual-Based Error Correction For Neural Operator Accelerated Infinite-Dimensional Bayesian Inverse Problems, Lianghao Cao, Thomas O'Leary-Roseberry, Prashant K. Jha, J. Tinsley Oden, Omar Ghattas

Faculty Publications

We explore using neural operators, or neural network representations of nonlinear maps between function spaces, to accelerate infinite-dimensional Bayesian inverse problems (BIPs) with models governed by nonlinear parametric partial differential equations (PDEs). Neural operators have gained significant attention in recent years for their ability to approximate the parameter-to-solution maps defined by PDEs using as training data solutions of PDEs at a limited number of parameter samples. The computational cost of BIPs can be drastically reduced if the large number of PDE solves required for posterior characterization are replaced with evaluations of trained neural operators. However, reducing error in the resulting …

Go to article

Quality Of Farmed Shrimp (Penaeus Monodon, Fabricius, 1798 And Macrobrachium Rosenbergii, Deman, 1879) As Affected By Melanosis Inhibiting Compounds, M. Khan, J. A. Lively Aug 2023

Quality Of Farmed Shrimp (Penaeus Monodon, Fabricius, 1798 And Macrobrachium Rosenbergii, Deman, 1879) As Affected By Melanosis Inhibiting Compounds, M. Khan, J. A. Lively

Faculty Publications

A problem associated with shrimp is blackspot or melanosis and to prevent blackspot, sulfites have been used for years but come with additional health risks. Newer 4-hexylresorcinol formulations exist that allow sulfite-free shrimp, but effects on the quality of Penaeus monodon Fabricius, 1798, and Macrobrachium rosenbergii, de Man, 1879, beyond melanosis prevention are unknown. Adverse effects on the quality of the shrimp from melanosis prevention treatments would negatively offset the benefits of a sulfite-free product. In order to determine if prevention compounds (sulfite powder or 4-hexylresorcinol based compounds, Everfresh® and Xyrex® Prawnfresh™) affect quality, proximate composition and total plate count …

Go to article

Dna Methylation Near Cpt1a And Changes In Triglyceride-Rich Lipoproteins In Response To Weight-Loss Diet Interventions, Xiang Li, Xiaojian Shao, Qiaochu Xue, Minghao Kou, Catherine M. Champagne, Boryana S. Koseva, Yoriko Heianza, Elin Grundberg, Lydia A. Bazzano, George A. Bray, Frank M. Sacks, Lu Qi Aug 2023

Dna Methylation Near Cpt1a And Changes In Triglyceride-Rich Lipoproteins In Response To Weight-Loss Diet Interventions, Xiang Li, Xiaojian Shao, Qiaochu Xue, Minghao Kou, Catherine M. Champagne, Boryana S. Koseva, Yoriko Heianza, Elin Grundberg, Lydia A. Bazzano, George A. Bray, Frank M. Sacks, Lu Qi

Population and Public Health Science Faculty Publications

Context: Carnitine palmitoyltransferase-1A, encoded by the CPT1A gene, plays a key role in the oxidation of long-chain fatty acids in the mitochondria and may be important in triglyceride metabolism. Previous work has shown that high fat intake was negatively associated with CPT1A methylation and positively associated with CPT1A expression. Objective: We aim to investigate the association of DNA methylation (DNAm) at the CPT1A gene with reductions in triglycerides and triglyceride-rich lipoproteins (TRLs) in response to weight-loss diet interventions. Methods: The current study included 538 White participants, who were randomly assigned to 1 of 4 diets varying in macronutrient components. We …

Go to article

Impact Of Reactive Oxygen Species Scavenging On The Intermediate Production Of Anthracene And Anthraquinone In Fresh Versus Saltwater Environments, Scott J. St. Romain, Laura M. Basirico, Yong Ha Kim, Emily Vebrosky Nolan, Wei Xu, Kevin L. Armbrust Aug 2023

Impact Of Reactive Oxygen Species Scavenging On The Intermediate Production Of Anthracene And Anthraquinone In Fresh Versus Saltwater Environments, Scott J. St. Romain, Laura M. Basirico, Yong Ha Kim, Emily Vebrosky Nolan, Wei Xu, Kevin L. Armbrust

Faculty Publications

While salinity can alter the photodegradation of hydrophobic organic compounds (HOCs), the cause of their altered kinetics in seawater is not well understood. Because HOC intermediate photoproducts are often more toxic than their parent compounds, characterizing the generation of intermediates in saline environments is needed to accurately predict their health effects. The present study investigated the influence of salinity on the generation of anthraquinone through the photolysis of anthracene and the generation of anthrone and 1-hydroxyanthraquinone from the photolysis of anthraquinone as well as their reactivities with hydroxyl radicals. This was conducted by measuring the photolysis rates of anthracene and …

Go to article

Fermi-Gbm Discovery Of Grb 221009a: An Extraordinarily Bright Grb From Onset To Afterglow, S. Lesage, P. Veres, M. S. Briggs, A. Goldstein, D. Kocevski, E. Burns, C. A. Wilson-Hodge, P. N. Bhat, D. Huppenkothen, C. L. Fryer, R. Hamburg, J. Racusin, E. Bissaldi, E. Bissaldi, W. H. Cleveland, S. Dalessi, C. Fletcher, M. M. Giles, B. A. Hristov, C. M. Hui, B. Mailyan, C. Malacaria, S. Poolakkil, O. J. Roberts, A. Von Kienlin, J. Wood, M. Ajello, M. Arimoto, L. Baldini, J. Ballet, M. G. Baring, D. Bastieri, J. Becerra Gonzalez Aug 2023

Fermi-Gbm Discovery Of Grb 221009a: An Extraordinarily Bright Grb From Onset To Afterglow, S. Lesage, P. Veres, M. S. Briggs, A. Goldstein, D. Kocevski, E. Burns, C. A. Wilson-Hodge, P. N. Bhat, D. Huppenkothen, C. L. Fryer, R. Hamburg, J. Racusin, E. Bissaldi, E. Bissaldi, W. H. Cleveland, S. Dalessi, C. Fletcher, M. M. Giles, B. A. Hristov, C. M. Hui, B. Mailyan, C. Malacaria, S. Poolakkil, O. J. Roberts, A. Von Kienlin, J. Wood, M. Ajello, M. Arimoto, L. Baldini, J. Ballet, M. G. Baring, D. Bastieri, J. Becerra Gonzalez

Faculty Publications

We report the discovery of GRB 221009A, the highest flux gamma-ray burst (GRB) ever observed by the Fermi Gamma-ray Burst Monitor (Fermi-GBM). This GRB has continuous prompt emission lasting more than 600 s, which smoothly transitions to afterglow emission visible in the Fermi-GBM energy range (8 keV-40 MeV), and total energetics higher than any other burst in the Fermi-GBM sample. By using a variety of new and existing analysis techniques we probe the spectral and temporal evolution of GRB 221009A. We find no emission prior to the Fermi-GBM trigger time (t 0; 2022 October 9 at 13:16:59.99 UTC), indicating that …

Go to article

The Master Growth Regulator Della Binding To Histone H2a Is Essential For Della-Mediated Global Transcription Regulation, Xu Huang, Hao Tian, Jeongmoo Park, Dong Ha Oh, Jianhong Hu, Rodolfo Zentella, Hong Qiao, Maheshi Dassanayake, Tai Ping Sun Aug 2023

The Master Growth Regulator Della Binding To Histone H2a Is Essential For Della-Mediated Global Transcription Regulation, Xu Huang, Hao Tian, Jeongmoo Park, Dong Ha Oh, Jianhong Hu, Rodolfo Zentella, Hong Qiao, Maheshi Dassanayake, Tai Ping Sun

Faculty Publications

The DELLA genes, also known as ‘Green Revolution’ genes, encode conserved master growth regulators that control plant development in response to internal and environmental cues. Functioning as nuclear-localized transcription regulators, DELLAs modulate expression of target genes via direct protein–protein interaction of their carboxy-terminal GRAS domain with hundreds of transcription factors (TFs) and epigenetic regulators. However, the molecular mechanism of DELLA-mediated transcription reprogramming remains unclear. Here by characterizing new missense alleles of an Arabidopsis DELLA, repressor of ga1-3 (RGA), and co-immunoprecipitation assays, we show that RGA binds histone H2A via the PFYRE subdomain within its GRAS domain to form a TF–RGA–H2A …

Go to article

Chemical Characterization And Impact Of Nipple Fruit (Solanum Mammosum) On The Characteristics Of Lactobacillus Acidophilus La K, Ricardo S. Aleman, Dany Avila, Allan Avila, Jack N. Losso, David Picha, Zhimin Xu, Kayanush Aryana Aug 2023

Chemical Characterization And Impact Of Nipple Fruit (Solanum Mammosum) On The Characteristics Of Lactobacillus Acidophilus La K, Ricardo S. Aleman, Dany Avila, Allan Avila, Jack N. Losso, David Picha, Zhimin Xu, Kayanush Aryana

Faculty Publications

Nipple fruit (Solanum mammosum) has been considered to have great pharmaceutical potential because of its high amounts of solamargine and solasonine. This study aimed to examine the effect of nipple fruit at different concentrations (0.5%, 1%, and 2% (w/v)) on the viability, acid, bile, lysozyme, and gastric juice tolerance, and protease activity of Lactobacillus acidophilus LA K. The viability was studied in MRS broth. Acid tolerance was determined by adjusting the pH to 2, whereas bile tolerance was examined with oxgall 0.3% (w/v) in MRS broth. Lysozyme resistance was investigated in an electrolyte solution with lysozyme (100 mg/L), while gastric …

Go to article

Optimizing Quantitative Trait Loci Introgression In Elite Rice Germplasms: Comparing Methods And Population Sizes To Develop New Recipients Via Stochastic Simulations, John Damien Platten, Roberto Fritsche-Neto Aug 2023

Optimizing Quantitative Trait Loci Introgression In Elite Rice Germplasms: Comparing Methods And Population Sizes To Develop New Recipients Via Stochastic Simulations, John Damien Platten, Roberto Fritsche-Neto

Faculty Publications

This study compared three strategies to develop new recipients for quantitative trait loci (QTL) introgression (background recovery [BG], selective sweep [SS] and breeding value [BV]) in a short-term rice breeding programme (over five breeding cycles). Furthermore, we evaluated two different numbers of recipients (10 and 20) in the introgression process and how they influence the population performance and the QTL fixation over cycles. Finally, we used the International Rice Research Institute (IRRI) rice breeding framework as the model to perform the stochastic simulations. Each strategy was simulated and replicated 100 times. Regardless of the selection strategy used, the QTL introgression …

Go to article

Unlocking The Potential Of Kinase Targets In Cancer: Insights From Canceromicsnet, An Ai-Driven Approach To Drug Response Prediction In Cancer, Manali Singha, Limeng Pu, Gopal Srivastava, Xialong Ni, Brent A. Stanfield, Ifeanyi K. Uche, Paul J.F. Rider, Konstantin G. Kousoulas, J. Ramanujam, Michal Brylinski Aug 2023

Unlocking The Potential Of Kinase Targets In Cancer: Insights From Canceromicsnet, An Ai-Driven Approach To Drug Response Prediction In Cancer, Manali Singha, Limeng Pu, Gopal Srivastava, Xialong Ni, Brent A. Stanfield, Ifeanyi K. Uche, Paul J.F. Rider, Konstantin G. Kousoulas, J. Ramanujam, Michal Brylinski

Faculty Publications

Deregulated protein kinases are crucial in promoting cancer cell proliferation and driving malignant cell signaling. Although these kinases are essential targets for cancer therapy due to their involvement in cell development and proliferation, only a small part of the human kinome has been targeted by drugs. A comprehensive scoring system is needed to evaluate and prioritize clinically relevant kinases. We recently developed CancerOmicsNet, an artificial intelligence model employing graph-based algorithms to predict the cancer cell response to treatment with kinase inhibitors. The performance of this approach has been evaluated in large-scale benchmarking calculations, followed by the experimental validation of selected …

Go to article

U-Net-Stn: A Novel End-To-End Lake Boundary Prediction Model, Lirong Yin, Lei Wang, Tingqiao Li, Siyu Lu, Zhengtong Yin, Xuan Liu, Xiaolu Li, Wenfeng Zheng Aug 2023

U-Net-Stn: A Novel End-To-End Lake Boundary Prediction Model, Lirong Yin, Lei Wang, Tingqiao Li, Siyu Lu, Zhengtong Yin, Xuan Liu, Xiaolu Li, Wenfeng Zheng

Faculty Publications

Detecting changes in land cover is a critical task in remote sensing image interpretation, with particular significance placed on accurately determining the boundaries of lakes. Lake boundaries are closely tied to land resources, and any alterations can have substantial implications for the surrounding environment and ecosystem. This paper introduces an innovative end-to-end model that combines U-Net and spatial transformation network (STN) to predict changes in lake boundaries and investigate the evolution of the Lake Urmia boundary. The proposed approach involves pre-processing annual panoramic remote sensing images of Lake Urmia, obtained from 1996 to 2014 through Google Earth Pro Version 7.3 …

Go to article

Object-Oriented Remote Sensing Approaches For The Detection Of Terrestrial Impact Craters As A Reconnaissance Survey, Habimana Emmanuel, Jaehyung Yu, Lei Wang, Sung Hi Choi, Digne Edmond Rwabuhungu Rwatangabo Aug 2023

Object-Oriented Remote Sensing Approaches For The Detection Of Terrestrial Impact Craters As A Reconnaissance Survey, Habimana Emmanuel, Jaehyung Yu, Lei Wang, Sung Hi Choi, Digne Edmond Rwabuhungu Rwatangabo

Faculty Publications

The purpose of this study is to employ a remote sensing reconnaissance survey based on optimal segmentation parameters and an object-oriented random forest approach to the identification of possible terrestrial impact craters from the global 30-m resolution SRTM DEM. A dataset consisting of 94 confirmed and well-preserved terrestrial impact craters, 104 volcanic calderas, and 124 valleys were extracted from real-world surface features. For craters with different sizes, eight optimal scale parameters from 80 to 3000 have been identified using multi-resolution segmentation, where the scale parameters have a positive correlation (R2 = 0.78) with the diameters of craters. The object-oriented random …

Go to article

Editorial Introduction: Exploring Theories And Subtleties Of The Policy Process, Geoboo Song, Melissa K. Merry, Nataliia Borozdina, Ben Galloway, Gwen Arnold, Aaron Smith-Walter, Holly L. Peterson, Creed Tumlison Aug 2023

Editorial Introduction: Exploring Theories And Subtleties Of The Policy Process, Geoboo Song, Melissa K. Merry, Nataliia Borozdina, Ben Galloway, Gwen Arnold, Aaron Smith-Walter, Holly L. Peterson, Creed Tumlison

Faculty Publications

No abstract provided.

Go to article

Mining Chinese Consumer Minds: Motivations For Selling Unwanted Fashion Items In Online Resale Marketplaces, Zhongjie Wang, Chuanlan Liu Aug 2023

Mining Chinese Consumer Minds: Motivations For Selling Unwanted Fashion Items In Online Resale Marketplaces, Zhongjie Wang, Chuanlan Liu

Faculty Publications

With the development of China’s fashion resale market, sustainable consumption patterns have gradually become popular in China. Although the prospects of China’s fashion resale market are recognized, more and more consumers are also actively participating in the circular consumption model. Consumers have multiple identities in participating in resale, and can be sellers or buyers. However, the sales intention of Chinese consumers to participate in resale as sellers is still unclear. We need to understand what value Chinese consumers are looking for in resale as sellers. The focus of this exploratory study is to understand the intention of Chinese consumers to …

Go to article

Countering The Pursuit Of “Magic Bullet” Solutions, Joseph B. Ryan, Paul Mooney Aug 2023

Countering The Pursuit Of “Magic Bullet” Solutions, Joseph B. Ryan, Paul Mooney

Faculty Publications

No abstract provided.

Go to article

Ridge Propagation And The Stability Of Small Mid-Ocean Ridge Offsets, Hugh Harper, Karen Luttrell, David T. Sandwell Aug 2023

Ridge Propagation And The Stability Of Small Mid-Ocean Ridge Offsets, Hugh Harper, Karen Luttrell, David T. Sandwell

Faculty Publications

The mid-ocean ridge system comprises a series of spreading ridges, transform faults, propagating ridges, and other non-transform offsets. Transform faults remain stable for millions of years leaving long linear scars, or fracture zones, on older seafloor. Propagating ridges migrate in the ridge parallel direction leaving V-shaped or W-shaped scars on older seafloor. Vertical gravity gradient maps can now resolve the details of the ridge segmentation. For slow- and intermediate-spreading ridges, there appears to be an offset length threshold above which adjacent ridges do not propagate so remain as stable transform faults. We propose this threshold is due to the yield …

Go to article

A Conceptual Investigation Of Transition To Self-Driven Turbidity Currents From Along-Shelf Current-Supported Turbidity Currents, Celalettin E. Ozdemir, Liangyi Yue, Haq Murad Nazari, George Xue, Samuel J. Bentley, Shuo Yang, Sayed O. Hofioni, Robert Forney, Saber Aradpour Aug 2023

A Conceptual Investigation Of Transition To Self-Driven Turbidity Currents From Along-Shelf Current-Supported Turbidity Currents, Celalettin E. Ozdemir, Liangyi Yue, Haq Murad Nazari, George Xue, Samuel J. Bentley, Shuo Yang, Sayed O. Hofioni, Robert Forney, Saber Aradpour

Faculty Publications

Wave- and current-supported turbidity currents (WCSTCs) are one of the sediment delivery mechanisms from the inner shelf to the shelf break. Therefore, they play a significant role in the global cycles of geo-chemically important particulate matter. Recent observations suggest that WCSTCs can transform into self-driven turbidity currents close to the continental margin. However, little is known regarding the critical conditions that grow self-driven turbidity currents out of WCSTCs. This is in part due to the knowledge gaps in the dynamics of WCSTCs regarding the role of density stratification. Especially the effect of sediment entrainment on the amount of sediment suspension …

Go to article

Performance Optimization Study Of The Neuromorphic Radiation Anomaly Detector, James Ghawaly, Aaron Young, Andrew Nicholson, Brett Witherspoon, Nick Prins, Mathew Swinney, Cihangir Celik, Catherine Schuman, Karan Patel Aug 2023

Performance Optimization Study Of The Neuromorphic Radiation Anomaly Detector, James Ghawaly, Aaron Young, Andrew Nicholson, Brett Witherspoon, Nick Prins, Mathew Swinney, Cihangir Celik, Catherine Schuman, Karan Patel

Faculty Publications

This work reports on new results and insights from the optimization of spiking neural networks developed for gamma-ray radiation anomaly detection. Our previous paper introduced the first known neuromorphic algorithm for this application, demonstrating promising results and insights into optimal hyperparameter selection - particularly in the choice of data input encodings. Since the first paper, we have tested the algorithms on new datasets to investigate transferability from one background radiation environment to another. We have also performed a new hyperparameter optimization experiment with this new dataset to investigate the impact of new radiation data formatting techniques, the inclusion or neuronal …

Go to article

Large-Scale Nonequilibrium Molecular Studies Of Thermal Hydrate Dissociation, Meisam Adibifard, Olufemi Olorode Jul 2023

Large-Scale Nonequilibrium Molecular Studies Of Thermal Hydrate Dissociation, Meisam Adibifard, Olufemi Olorode

Faculty Publications

The energy content of methane hydrate reservoirs (MHRs) is at least twice that of conventional fossil fuels. So, there is considerable interest in their commercial development by heating, among other dissociation mechanisms. However, a few researchers have highlighted the potentially uncontrollable release of methane from MHRs, which could occur because of global warming. Therefore, it is crucial to understand the kinetics of thermal hydrate dissociation to safely develop these resources and prevent the release of this greenhouse gas into the environment. Although there have been several molecular studies of thermal dissociation, most of these use small simulation domains that cannot …

Go to article

Connecting The Optical Regime To The X-Ray In Neutron Star Low Mass X-Ray Binaries, Alexander B. Igl Jul 2023

Connecting The Optical Regime To The X-Ray In Neutron Star Low Mass X-Ray Binaries, Alexander B. Igl

LSU Doctoral Dissertations

Using Rossi X-Ray Timing Explorer and Otto Struve Telescope data of low mass X-ray binaries (LMXBs) Cyg X-2 and Sco X-1, the optical regime’s relationship to the X-ray was investigated through several angles. Discrete cross correlations using the optical and X-ray data revealed evidence of reprocessing in both datasets. These were more consistently present in Sco X-1, where both small and obvious features were seen at less than 4 s of optical lag. The size of these lags makes it likely that most of the reprocessing is taking place on the accretion disk. Parameterization of the Z tracks led to …

Go to article

Metamorphic P-T Paths Of Archean Granulite Facies Metasedimentary Lithologies From The Eastern Beartooth Mountains Of The Northern Wyoming Province, Montana, Usa: Constraints From Quartz-In-Garnet (Quig) Raman Elastic Barometry, Geothermobarometry, And Thermodynamic Modeling, Larry Tuttle, Darrell J. Henry Jul 2023

Metamorphic P-T Paths Of Archean Granulite Facies Metasedimentary Lithologies From The Eastern Beartooth Mountains Of The Northern Wyoming Province, Montana, Usa: Constraints From Quartz-In-Garnet (Quig) Raman Elastic Barometry, Geothermobarometry, And Thermodynamic Modeling, Larry Tuttle, Darrell J. Henry

Faculty Publications

Metamorphic pressure and temperature (P-T) paths in late-Archean high-grade rocks of the eastern Beartooth Mountains of Montana (USA), a portion of the Wyoming Province, are established by a combination of imaging, analytical, and modeling approaches. Garnet inclusion mechanical and chemical thermobarometry, applied to several granulite-facies migmatites and an iron formation, is particularly useful in constraining the prograde P-T conditions. Quartz-in-garnet (QuiG) elastic Raman barometry was used on quartz inclusions in garnet for all samples studied. For a smaller subset of four representative samples, QuiG constraints were used in conjunction with Ti-in-quartz (TitaniQ) and Ti-in-biotite (TiB) thermometry to establish unique prograde …

Go to article

First Prev Next Last