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Faculty Publications

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Global Dataset Of Soil Organic Carbon In Tidal Marshes, Tania L. Maxwell, André S. Rovai, Maria Fernanda Adame, Janine B. Adams, José Álvarez-Rogel, William E.N. Austin, Kim Beasy, Francesco Boscutti, Michael E. Böttcher, Tjeerd J. Bouma, Richard H. Bulmer, Annette Burden, Shannon A. Burke, Saritta Camacho, Doongar R. Chaudhary, Gail L. Chmura, Margareth Copertino, Grace M. Cott, Christopher Craft, John Day, Carmen B. De Los Santos, Lionel Denis, Weixin Ding, Joanna C. Ellison, Carolyn J. Ewers Lewis, Luise Giani, Maria Gispert, Swanne Gontharet, José A. González-Pérez, M. Nazaret González-Alcaraz, Connor Gorham, Anna Elizabeth L. Graversen, Anthony Grey Dec 2023

Global Dataset Of Soil Organic Carbon In Tidal Marshes, Tania L. Maxwell, André S. Rovai, Maria Fernanda Adame, Janine B. Adams, José Álvarez-Rogel, William E.N. Austin, Kim Beasy, Francesco Boscutti, Michael E. Böttcher, Tjeerd J. Bouma, Richard H. Bulmer, Annette Burden, Shannon A. Burke, Saritta Camacho, Doongar R. Chaudhary, Gail L. Chmura, Margareth Copertino, Grace M. Cott, Christopher Craft, John Day, Carmen B. De Los Santos, Lionel Denis, Weixin Ding, Joanna C. Ellison, Carolyn J. Ewers Lewis, Luise Giani, Maria Gispert, Swanne Gontharet, José A. González-Pérez, M. Nazaret González-Alcaraz, Connor Gorham, Anna Elizabeth L. Graversen, Anthony Grey

Faculty Publications

Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil organic carbon (SOC) stocks provide an important resource for researchers, natural resource managers, and policy-makers working towards the protection, restoration, and valuation of these ecosystems. We collated a global dataset of tidal marsh soil organic carbon (MarSOC) from 99 studies that includes location, soil depth, site name, dry bulk density, SOC, and/or soil organic matter (SOM). The MarSOC dataset includes 17,454 data points from 2,329 unique locations, and 29 countries. We generated a general transfer function for the conversion of SOM to SOC. Using this …

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Deep Learning For Enhanced Free-Space Optical Communications, M. P. Bart, N. J. Savino, P. Regmi, L. Cohen, H. Safavi, H. C. Shaw, S. Lohani, T. A. Searles, B. T. Kirby, H. Lee, R. T. Glasser Dec 2023

Deep Learning For Enhanced Free-Space Optical Communications, M. P. Bart, N. J. Savino, P. Regmi, L. Cohen, H. Safavi, H. C. Shaw, S. Lohani, T. A. Searles, B. T. Kirby, H. Lee, R. T. Glasser

Faculty Publications

Atmospheric effects, such as turbulence and background thermal noise, inhibit the propagation of light used in ON-OFF keying (OOK) free-space optical (FSO) communication. Here we present and experimentally validate a convolutional neural network (CNN) to reduce the bit error rate of FSO communication in post-processing that is significantly simpler and cheaper than existing solutions based on advanced optics. Our approach consists of two neural networks, the first determining the presence of bit sequences in thermal noise and turbulence and the second demodulating the bit sequences. All data used for training and testing our network is obtained experimentally by generating OOK …

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Author Correction: Multiphoton Quantum Van Cittert-Zernike Theorem (Npj Quantum Information, (2023), 9, 1, (50), 10.1038/S41534-023-00720-W), Chenglong You, Ashe Miller, Roberto De J. León-Montiel, Omar S. Magaña-Loaiza Dec 2023

Author Correction: Multiphoton Quantum Van Cittert-Zernike Theorem (Npj Quantum Information, (2023), 9, 1, (50), 10.1038/S41534-023-00720-W), Chenglong You, Ashe Miller, Roberto De J. León-Montiel, Omar S. Magaña-Loaiza

Faculty Publications

Correction to: npj Quantum Information, published online 26 May 2023 In the abstract for this article, the sentence “This fundamental theorem demonstrates that the quantum statistical fluctuations, which define the nature of diverse light sources, can be modified upon propagation in the absence of light-matter interactions” was inadvertently truncated after the text ‘quantum statistical fluctuations; the following text was missing ‘which define the nature of diverse light sources’. The original article has been corrected.

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Multiphoton Quantum Van Cittert-Zernike Theorem, Chenglong You, Ashe Miller, Roberto De J. León-Montiel, Omar S. Magaña-Loaiza Dec 2023

Multiphoton Quantum Van Cittert-Zernike Theorem, Chenglong You, Ashe Miller, Roberto De J. León-Montiel, Omar S. Magaña-Loaiza

Faculty Publications

Recent progress on quantum state engineering has enabled the preparation of quantum photonic systems comprising multiple interacting particles. Interestingly, multiphoton quantum systems can host many complex forms of interference and scattering processes that are essential to perform operations that are intractable on classical systems. Unfortunately, the quantum coherence properties of multiphoton systems degrade upon propagation leading to undesired quantum-to-classical transitions. Furthermore, the manipulation of multiphoton quantum systems requires nonlinear interactions at the few-photon level. Here, we introduce the quantum van Cittert-Zernike theorem to describe the scattering and interference effects of propagating multiphoton systems. This fundamental theorem demonstrates that the quantum …

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Probing The Galactic Diffuse Continuum Emission With Cosi, Christopher M. Karwin, Thomas Siegert, Jacqueline Beechert, John A. Tomsick, Troy A. Porter, Michela Negro, Carolyn Kierans, Marco Ajello, Israel Martinez-Castellanos, Albert Shih, Andreas Zoglauer, Steven E. Boggs Dec 2023

Probing The Galactic Diffuse Continuum Emission With Cosi, Christopher M. Karwin, Thomas Siegert, Jacqueline Beechert, John A. Tomsick, Troy A. Porter, Michela Negro, Carolyn Kierans, Marco Ajello, Israel Martinez-Castellanos, Albert Shih, Andreas Zoglauer, Steven E. Boggs

Faculty Publications

In 2016, the Compton Spectrometer and Imager (COSI) had a successful 46 day flight on board NASA’s Super Pressure Balloon platform. In this work, we report measurements of the Galactic diffuse continuum emission (GDCE) observed toward the inner Galaxy during the flight, which in the COSI energy band (0.2-5 MeV) is primarily generated from inverse Compton radiation. Within uncertainties, we find overall good agreement with previous measurements from INTEGRAL/SPI and COMPTEL. Based on these initial findings, we discuss the potential for further probing the GDCE with the 2016 COSI balloon data, as well as prospects for the upcoming satellite mission.

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Low Sodium Availability In Hydroponically Manipulated Host Plants Promotes Cannibalism In A Lepidopteran Herbivore, Luis Y. Santiago-Rosario, Ana L. Salgado, Diego Paredes-Burneo, Kyle E. Harms Dec 2023

Low Sodium Availability In Hydroponically Manipulated Host Plants Promotes Cannibalism In A Lepidopteran Herbivore, Luis Y. Santiago-Rosario, Ana L. Salgado, Diego Paredes-Burneo, Kyle E. Harms

Faculty Publications

As an abundant element in the Earth’s crust, sodium plays an unusual role in food webs. Its availability in terrestrial environments is highly variable, but it is nonessential for most plants, yet essential for animals and most decomposers. Accordingly, sodium requirements are important drivers of various animal behavioural patterns and performance levels. To specifically test whether sodium limitation increases cannibalism in a gregarious lepidopteran herbivore, we hydroponically manipulated Helianthus annuus host plants' tissue-sodium concentrations. Gregarious larvae of the bordered patch butterfly, Chlosyne lacinia, cannibalized siblings when plant-tissue sodium concentrations were low in two separate experiments. Although cannibalism was almost non-existent …

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Cells Collectively Migrate During Ammonium Chemotaxis In Chlamydomonas Reinhardtii, Gabela Nelson, Alexis Strain, Atsuko Isu, Alireza Rahnama, Ken Ichi Wakabayashi, Adam T. Melvin, Naohiro Kato Dec 2023

Cells Collectively Migrate During Ammonium Chemotaxis In Chlamydomonas Reinhardtii, Gabela Nelson, Alexis Strain, Atsuko Isu, Alireza Rahnama, Ken Ichi Wakabayashi, Adam T. Melvin, Naohiro Kato

Faculty Publications

The mechanisms governing chemotaxis in Chlamydomonas reinhardtii are largely unknown compared to those regulating phototaxis despite equal importance on the migratory response in the ciliated microalga. To study chemotaxis, we made a simple modification to a conventional Petri dish assay. Using the assay, a novel mechanism governing Chlamydomonas ammonium chemotaxis was revealed. First, we found that light exposure enhances the chemotactic response of wild-type Chlamydomonas strains, yet phototaxis-incompetent mutant strains, eye3-2 and ptx1, exhibit normal chemotaxis. This suggests that Chlamydomonas transduces the light signal pathway in chemotaxis differently from that in phototaxis. Second, we found that Chlamydomonas collectively migrate during …

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Application Of Magnesium And Biosurfactant Functionalized Biochar Composite In Treating Cyanobacteria In Phosphorus And Crude Oil Contaminated Water, Zhuo Wei, Yaxi Xu, Yi Wei, Yang Liu, Shuai Niu, Jim J. Wang Dec 2023

Application Of Magnesium And Biosurfactant Functionalized Biochar Composite In Treating Cyanobacteria In Phosphorus And Crude Oil Contaminated Water, Zhuo Wei, Yaxi Xu, Yi Wei, Yang Liu, Shuai Niu, Jim J. Wang

Faculty Publications

Various human activities have led to multiple contamination of natural water systems. The present study investigated the effect of a novel multifunctional biochar to treat nutrients, oil, and harmful algae in water. Specifically, magnesium (Mg) and biosurfactant rhamnolipid (RL) were incorporated into biochar, including Mg-biochar, RL-biochar, and Mg-RL-biochar. Their adsorption efficiency on phosphate and total petroleum hydrocarbons (TPH) was evaluated in separate batch studies. Also, the inhibition effect of RL-modified biochars on cyanobacteria was investigated. The results showed that Mg-impregnated biochar showed high adsorption capacity on phosphate (118 mg g−1), while RL-modified biochar significantly reduced TPH (especially aromatic and light …

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Molecular Mapping And Characterization Of Qtls For Grain Quality Traits In A Ril Population Of Us Rice Under High Nighttime Temperature Stress, Anuj Kumar, Julie Thomas, Navdeep Gill, Yheni Dwiningsih, Charles Ruiz, Adam Famoso, Andy Pereira Dec 2023

Molecular Mapping And Characterization Of Qtls For Grain Quality Traits In A Ril Population Of Us Rice Under High Nighttime Temperature Stress, Anuj Kumar, Julie Thomas, Navdeep Gill, Yheni Dwiningsih, Charles Ruiz, Adam Famoso, Andy Pereira

Faculty Publications

Elevated nighttime temperatures resulting from climate change significantly impact the rice crop worldwide. The rice (Oryza sativa L.) plant is highly sensitive to high nighttime temperature (HNT) during grain-filling (reproductive stage). HNT stress negatively affects grain quality traits and has a major impact on the value of the harvested rice crop. In addition, along with grain dimensions determining rice grain market classes, the grain appearance and quality traits determine the rice grain market value. During the last few years, there has been a major concern for rice growers and the rice industry over the prevalence of rice grains opacity and …

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Construction And Genetic Characterization Of An Interspecific Raspberry Hybrids Panel Aiming Resistance To Late Leaf Rust And Adaptation To Tropical Regions, Gabriela Romêro Campos, Melina Prado, Karina Lima Reis Borges, Rafael Massahiro Yassue, Felipe Sabadin, Allison Vieira Da Silva, Caio Morais De Alcântara Barbosa, Marcel Bellato Sposito, Lilian Amorim, Roberto Fritsche-Neto Dec 2023

Construction And Genetic Characterization Of An Interspecific Raspberry Hybrids Panel Aiming Resistance To Late Leaf Rust And Adaptation To Tropical Regions, Gabriela Romêro Campos, Melina Prado, Karina Lima Reis Borges, Rafael Massahiro Yassue, Felipe Sabadin, Allison Vieira Da Silva, Caio Morais De Alcântara Barbosa, Marcel Bellato Sposito, Lilian Amorim, Roberto Fritsche-Neto

Faculty Publications

Raspberries (Rubus spp) are temperate climate fruits with profitable high returns and have the potential for diversification of fruit growing in mid to low-latitude regions. However, there are still no cultivars adapted to climatic conditions and high pressure of diseases that occurs in tropical areas. In this context, our objective was to evaluate the genetic diversity from a 116 raspberry genotypes panel obtained from interspecific crosses in a testcross scheme with four cultivars already introduced in Brazil. The panel was genotyped via genotyping-by-sequencing. 28,373 and 27,281 SNPs were obtained, using the species R. occidentalis and R. idaeus genomes as references, …

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Enviromic-Based Kernels May Optimize Resource Allocation With Multi-Trait Multi-Environment Genomic Prediction For Tropical Maize, Raysa Gevartosky, Humberto Fanelli Carvalho, Germano Costa-Neto, Osval A. Montesinos-López, José Crossa, Roberto Fritsche-Neto Dec 2023

Enviromic-Based Kernels May Optimize Resource Allocation With Multi-Trait Multi-Environment Genomic Prediction For Tropical Maize, Raysa Gevartosky, Humberto Fanelli Carvalho, Germano Costa-Neto, Osval A. Montesinos-López, José Crossa, Roberto Fritsche-Neto

Faculty Publications

Background: Success in any genomic prediction platform is directly dependent on establishing a representative training set. This is a complex task, even in single-trait single-environment conditions and tends to be even more intricated wherein additional information from envirotyping and correlated traits are considered. Here, we aimed to design optimized training sets focused on genomic prediction, considering multi-trait multi-environment trials, and how those methods may increase accuracy reducing phenotyping costs. For that, we considered single-trait multi-environment trials and multi-trait multi-environment trials for three traits: grain yield, plant height, and ear height, two datasets, and two cross-validation schemes. Next, two strategies for …

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Thermally Initiated Cationic Frontal Polymerization Of Epoxies And Vinyl Ethers Through A Lone Onium Salt, Brecklyn R. Groce, Madison M. Ferguson, John A. Pojman Dec 2023

Thermally Initiated Cationic Frontal Polymerization Of Epoxies And Vinyl Ethers Through A Lone Onium Salt, Brecklyn R. Groce, Madison M. Ferguson, John A. Pojman

Faculty Publications

Frontal polymerization (FP) of epoxy monomers is typically achieved with a radical-induced cationic frontal polymerization (RICFP) process that combines a thermal radical initiator with an onium salt superacid generator. In this paper, we show that both thermal and UV-initiated cationic frontal polymerizations are possible for common epoxy and vinyl ether monomers with only an iodonium superacid generator in the absence of a standalone thermal radical initiator. Increasing superacid generator concentration resulted in an increase in front velocity, as did the addition of vinyl ether to epoxies. The front velocity is reduced by the addition of 4-methoxyphenol (MeHQ), indicating free-radicals play …

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Benzyne-Promoted, 1,2-Cis-Selective O-Glycosylation With Benzylchalcogenoglycoside Donors, Tiffany Duong, Erik Alvarez Valenzuela, Justin R. Ragains Dec 2023

Benzyne-Promoted, 1,2-Cis-Selective O-Glycosylation With Benzylchalcogenoglycoside Donors, Tiffany Duong, Erik Alvarez Valenzuela, Justin R. Ragains

Faculty Publications

Here, we show that the reaction of benzylchalcogenoglycosides with benzyne in the presence of alcohols results in highly 1,2-cis-selective O-glycosylation in a solvent-dependent manner. Thioglycosides, selenoglycosides, and alcohols with a range of nucleophilicities lead to a productive reaction, and unusual protecting groups, auxiliary groups, and additives are avoided.

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Hyperbolic Matrix Factorization Improves Prediction Of Drug-Target Associations, Aleksandar Poleksic Dec 2023

Hyperbolic Matrix Factorization Improves Prediction Of Drug-Target Associations, Aleksandar Poleksic

Faculty Publications

Past research in computational systems biology has focused more on the development and applications of advanced statistical and numerical optimization techniques and much less on understanding the geometry of the biological space. By representing biological entities as points in a low dimensional Euclidean space, state-of-the-art methods for drug-target interaction (DTI) prediction implicitly assume the flat geometry of the biological space. In contrast, recent theoretical studies suggest that biological systems exhibit tree-like topology with a high degree of clustering. As a consequence, embedding a biological system in a flat space leads to distortion of distances between biological objects. Here, we present …

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Healthy Eating And Active Living Policy, Systems, And Environmental Changes In Rural Louisiana: A Contextual Inquiry To Inform Implementation Strategies, Bailey Houghtaling, Laura Balis, Nila Pradhananga, Melissa Cater, Denise Holston Dec 2023

Healthy Eating And Active Living Policy, Systems, And Environmental Changes In Rural Louisiana: A Contextual Inquiry To Inform Implementation Strategies, Bailey Houghtaling, Laura Balis, Nila Pradhananga, Melissa Cater, Denise Holston

Faculty Publications

Background: Healthy eating and active living policy, systems, and environmental (PSE) changes are implemented across the United States through Cooperative Extension. However, translating multisector PSE changes to practice in community settings is challenging and there is a lack of knowledge about barriers and facilitators to PSE changes among state Extension systems using standardized frameworks. Therefore, a research-to-practice partnership effort aimed to identify Louisiana Cooperative Extension Service Family and Consumer Science (LFCS) practitioners’ barriers and facilitators to implementing PSE changes in rural Louisiana communities. Methods: A qualitative approach using the 2022 Consolidated Framework for Implementation Research (2022 CFIR) was used. Focus …

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Mid-Miocene Sea Level Altitude Of The Qaidam Basin, Northern Tibetan Plateau, Yuanyuan Sun, Yu Liang, Hu Liu, Jun Liu, Junliang Ji, Xue Ke, Xiaobo Liu, Yuxin He, Huanye Wang, Bin Zhang, Yongsu Zhang, Guangsheng Zhuang, Junling Pei, Yongxiang Li, Cheng Quan, Jianxing Li, Jonathan C. Aitchison, Weiguo Liu, Zhonghui Liu Dec 2023

Mid-Miocene Sea Level Altitude Of The Qaidam Basin, Northern Tibetan Plateau, Yuanyuan Sun, Yu Liang, Hu Liu, Jun Liu, Junliang Ji, Xue Ke, Xiaobo Liu, Yuxin He, Huanye Wang, Bin Zhang, Yongsu Zhang, Guangsheng Zhuang, Junling Pei, Yongxiang Li, Cheng Quan, Jianxing Li, Jonathan C. Aitchison, Weiguo Liu, Zhonghui Liu

Faculty Publications

A detailed uplift history of the Tibetan Plateau is essential for disentangling the proposed geodynamical models and assessing its impacts on climate and biodiversity. However, when and how the plateau formed remains highly controversial. Here, we present unusual geochemical indicators of marine signatures in the Cenozoic terrestrial strata of the Qaidam Basin, northern Tibetan Plateau, with strong implications for the basin altitude. Our investigations across the basin reveal typical marine alkenones and anomalously high carbonate carbon isotopic values during the mid-Miocene, but not at earlier stages, which are accompanied by a divergent trend in the paired carbonate oxygen and leaf …

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African Bovid Tribe Classification Using Transfer Learning And Computer Vision, Manuel Domínguez-Rodrigo, Juliet Brophy, Gregory J. Mathews, Marcos Pizarro-Monzo, Enrique Baquedano Dec 2023

African Bovid Tribe Classification Using Transfer Learning And Computer Vision, Manuel Domínguez-Rodrigo, Juliet Brophy, Gregory J. Mathews, Marcos Pizarro-Monzo, Enrique Baquedano

Faculty Publications

Objective analytical identification methods are still a minority in the praxis of paleobiological sciences. Subjective interpretation of fossils and their modifications remains a nonreplicable expert endeavor. Identification of African bovids is a crucial element in the reconstruction of paleo-landscapes, ungulate paleoecology, and, eventually, hominin adaptation and ecosystemic reconstruction. Recent analytical efforts drawing on Fourier functional analysis and discrimination methods applied to occlusal surfaces of teeth have provided a highly accurate framework to correctly classify African bovid tribes and taxa. Artificial intelligence tools, like computer vision, have also shown their potential to be objectively more accurate in the identification of taphonomic …

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Multiscale Analysis Of Spatial Accessibility To Acute Hospitals In Carinthia, Austria, Changzhen Wang, Michael Leitner, Gernot Paulus Dec 2023

Multiscale Analysis Of Spatial Accessibility To Acute Hospitals In Carinthia, Austria, Changzhen Wang, Michael Leitner, Gernot Paulus

Faculty Publications

Health care accessibility studies are well established in the US but lacking in Austria, even though both experience high costs and have hospital care as the largest contributor to health care spending. This study aims to examine multiscale spatial accessibility to acute hospitals in Carinthia, Austria. Using the most recent data at census block and 250 meter grid levels, we refine proximity and generalized two-step floating catchment area (G2SFCA) methods while accounting for the modifiable areal unit problem (MAUP) and edge effects. For census blocks and 250 meter grids, the mean travel times to the nearest acute hospitals are 16 …

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Digital Archives: How Western Newspapers Frame Our Remembrance Of The Gezi Park Protest, Nihar Sreepada, Ahmet Aksoy Dec 2023

Digital Archives: How Western Newspapers Frame Our Remembrance Of The Gezi Park Protest, Nihar Sreepada, Ahmet Aksoy

Faculty Publications

We analyze the coverage of the Gezi Park protests by two major Western newspapers - The New York Times and The Guardian - through the lens of media framing, rhetoric, and collective memory. We argue that these digital archives frame Turkey's Gezi Park protests as a challenge to an authoritarian government by promoting the themes of unrest as a conflict of ideologies, oppression of citizens, and the park as a site of memory. In a concluding section, we focus on the significance of digital archives as repositories of collective memory and the role of media framing in shaping these reconstructions …

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Examining Consumers’ Perceptions Of And Attitudes Toward Digital Fashion In General And Purchase Intention Of Luxury Brands’ Digital Fashion Specifically, Yanbo Zhang, Chuanlan Liu, Yanru Lyu Dec 2023

Examining Consumers’ Perceptions Of And Attitudes Toward Digital Fashion In General And Purchase Intention Of Luxury Brands’ Digital Fashion Specifically, Yanbo Zhang, Chuanlan Liu, Yanru Lyu

Faculty Publications

Digital fashion may instill transformative power into the fashion industry as it can simultaneously deliver fashionability and sustainability. Renowned for their innovativeness and creativity, luxury brands embrace digital fashion and achieve market success, indicating the future of digital fashion. This research aims to empirically investigate consumers’ general perceptions and evaluations of digital fashion and to specifically examine consumers’ purchase intention of luxury brands’ digital fashion. A total of 214 responses were collected from a U.S.-based research company’s consumer panel. Data were analyzed by using structural equation modeling (SEM). The results revealed that the general attitude toward digital fashion is influenced …

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Informing Trauma-Informed Care In Schools And Other Useful Practices For Students With Emotional And Behavioral Disorders, Paul Mooney, Joseph B. Ryan Dec 2023

Informing Trauma-Informed Care In Schools And Other Useful Practices For Students With Emotional And Behavioral Disorders, Paul Mooney, Joseph B. Ryan

Faculty Publications

No abstract provided.

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Remote Testing Of Adult Neurogenic Tests: Implications And Recommendations For Speech-Language Pathologists, Angela Burda, Carrie Axt, Samantha Balk, Zoe Bleile, Madilyn Fahey, Paul Kort Freeman, Heather Hogelucht, Paeten Schultz, Kamryn Shaffer, Kara Wright Dec 2023

Remote Testing Of Adult Neurogenic Tests: Implications And Recommendations For Speech-Language Pathologists, Angela Burda, Carrie Axt, Samantha Balk, Zoe Bleile, Madilyn Fahey, Paul Kort Freeman, Heather Hogelucht, Paeten Schultz, Kamryn Shaffer, Kara Wright

Faculty Publications

Purpose: One purpose of this preliminary case report was to document the challenges that can arise when giving adult neurogenic tests via telepractice. Another purpose was to develop recommendations on adaptations that can be made when speech-language pathologists give the tests employed in this report. Though one test was adapted by its authors to be given remotely, the other two tests have little or no published adaptations regarding remote administration. Methods: A 33 year old female and a 51 year old male, both of whom have acquired neurogenic communicative disorders, were given the Apraxia Battery for Adults-2nd edition, the Ross …

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Morphodynamic Modeling Of Fourleague Bay In Mississippi River Delta: Sediment Fluxes Across River-Estuary-Wetland Boundaries, Nan Wang, Qin Chen, Kelin Hu, Kehui Xu, Samuel J. Bentley, Jiaze Wang Dec 2023

Morphodynamic Modeling Of Fourleague Bay In Mississippi River Delta: Sediment Fluxes Across River-Estuary-Wetland Boundaries, Nan Wang, Qin Chen, Kelin Hu, Kehui Xu, Samuel J. Bentley, Jiaze Wang

Faculty Publications

To mitigate land losses in the Mississippi River Delta, sediment diversions are being employed to enable the flow of river water and sediments into wetlands experiencing degradation. A two-dimensional coupled flow-wave Delft3D model was used in this study to explore the hydrodynamics and sediment transport in Fourleague Bay (FLB), Louisiana, USA, which has been considered an analog site for studying the efficiency of sediment diversion projects. In-situ measurements of sediment accretion and hydrodynamic characteristics from 2015 to 2016 were utilized to calibrate and validate the morphodynamic model. The validated model was then applied to quantify sediment transport in FLB and …

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Single-Cell Analysis In Hypersaline Brines Predicts A Water-Activity Limit Of Microbial Anabolic Activity, Emily R. Paris, Nestor Arandia-Gorostidi, Benjamin Klempay, Jeff S. Bowman, Alexandra Pontefract, Claire E. Elbon, Jennifer B. Glass, Ellery D. Ingall, Peter T. Doran, Sanjoy M. Som, Britney E. Schmidt, Anne E. Dekas Dec 2023

Single-Cell Analysis In Hypersaline Brines Predicts A Water-Activity Limit Of Microbial Anabolic Activity, Emily R. Paris, Nestor Arandia-Gorostidi, Benjamin Klempay, Jeff S. Bowman, Alexandra Pontefract, Claire E. Elbon, Jennifer B. Glass, Ellery D. Ingall, Peter T. Doran, Sanjoy M. Som, Britney E. Schmidt, Anne E. Dekas

Faculty Publications

Hypersaline brines provide excellent opportunities to study extreme microbial life. Here, we investigated anabolic activity in nearly 6000 individual cells from solar saltern sites with water activities (aw) ranging from 0.982 to 0.409 (seawater to extreme brine). Average anabolic activity decreased exponentially with aw, with nuanced trends evident at the single-cell level: The proportion of active cells remained high (>50%) even after NaCl saturation, and subsets of cells spiked in activity as aw decreased. Intracommunity heterogeneity in activity increased as seawater transitioned to brine, suggesting increased phenotypic heterogeneity with increased physiological stress. No microbial activity was detected in the …

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Sediment Delivery To Sustain The Ganges-Brahmaputra Delta Under Climate Change And Anthropogenic Impacts, Jessica L. Raff, Steven L. Goodbred, Jennifer L. Pickering, Ryan S. Sincavage, John C. Ayers, Md Saddam Hossain, Carol A. Wilson, Chris Paola, Michael S. Steckler, Dhiman R. Mondal, Jean Louis Grimaud, Celine Jo Grall, Kimberly G. Rogers, Kazi Matin Ahmed, Syed Humayun Akhter, Brandee N. Carlson, Elizabeth L. Chamberlain, Meagan Dejter, Jonathan M. Gilligan, Richard P. Hale, Mahfuzur R. Khan, Md Golam Muktadir, Md Munsur Rahman, Lauren A. Williams Dec 2023

Sediment Delivery To Sustain The Ganges-Brahmaputra Delta Under Climate Change And Anthropogenic Impacts, Jessica L. Raff, Steven L. Goodbred, Jennifer L. Pickering, Ryan S. Sincavage, John C. Ayers, Md Saddam Hossain, Carol A. Wilson, Chris Paola, Michael S. Steckler, Dhiman R. Mondal, Jean Louis Grimaud, Celine Jo Grall, Kimberly G. Rogers, Kazi Matin Ahmed, Syed Humayun Akhter, Brandee N. Carlson, Elizabeth L. Chamberlain, Meagan Dejter, Jonathan M. Gilligan, Richard P. Hale, Mahfuzur R. Khan, Md Golam Muktadir, Md Munsur Rahman, Lauren A. Williams

Faculty Publications

The principal nature-based solution for offsetting relative sea-level rise in the Ganges-Brahmaputra delta is the unabated delivery, dispersal, and deposition of the rivers’ ~1 billion-tonne annual sediment load. Recent hydrological transport modeling suggests that strengthening monsoon precipitation in the 21st century could increase this sediment delivery 34-60%; yet other studies demonstrate that sediment could decline 15-80% if planned dams and river diversions are fully implemented. We validate these modeled ranges by developing a comprehensive field-based sediment budget that quantifies the supply of Ganges-Brahmaputra river sediment under varying Holocene climate conditions. Our data reveal natural responses in sediment supply comparable to …

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Hybrid Hemp/Glass Fiber Reinforced High-Temperature Shape Memory Photopolymer With Mechanical And Flame-Retardant Analysis, Sakil Mahmud, John Konlan, Jenny Deicaza, Guoqiang Li Dec 2023

Hybrid Hemp/Glass Fiber Reinforced High-Temperature Shape Memory Photopolymer With Mechanical And Flame-Retardant Analysis, Sakil Mahmud, John Konlan, Jenny Deicaza, Guoqiang Li

Faculty Publications

Cultivated natural fibers have a huge possibility for green and sustainable reinforcement for polymers, but their limited load-bearing ability and flammability prevent them from wide applications in composites. According to the beam theory, normal stress is the maximum at the outermost layers but zero at the mid-plane under bending (with (non)linear strain distribution). Shear stress is the maximum at the mid-plane but manageable for most polymers. Accordingly, a laminated composite made of hybrid fiber-reinforced shape memory photopolymer was developed, incorporating strong synthetic glass fibers over a weak core of natural hemp fibers. Even with a significant proportion of natural hemp …

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Engineering Inlet Structures To Enhance Dna Capture Into Nanochannels In A Polymer Nanofluidic Device Produced Via Nanoimprint Lithography, Jiahao Wu, Junseo Choi, Franklin I. Uba, Steven A. Soper, Sunggook Park Dec 2023

Engineering Inlet Structures To Enhance Dna Capture Into Nanochannels In A Polymer Nanofluidic Device Produced Via Nanoimprint Lithography, Jiahao Wu, Junseo Choi, Franklin I. Uba, Steven A. Soper, Sunggook Park

Faculty Publications

Operating nanofluidic biosensors requires threading single molecules to be analyzed from microfluidic networks into nanostructures, mostly nanochannels or nanopores. Different inlet structures have been employed as a means of enhancing the number of the capture events into nanostructures. Here, we systematically investigated the effects of various engineered inlet structures formed at the micro/nanochannel interface on the capture of single λ-DNA molecules into the nanochannels. Different inlet geometries were evaluated and ranked in order of their effectiveness. Adding an inlet structure prior to a nanochannel effectively improved the DNA capture rate by 190–700% relative to that for the abrupt micro/nanochannel interface. …

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Breaking Boundaries In Wind Engineering: Lsu Wise Open-Jet Facility Revolutionizes Solar Panel And Building Design, Aly Mousaad Aly Dec 2023

Breaking Boundaries In Wind Engineering: Lsu Wise Open-Jet Facility Revolutionizes Solar Panel And Building Design, Aly Mousaad Aly

Faculty Publications

Featured Application: The Louisiana State University (LSU) Windstorm Impact, Science, and Engineering (WISE) Open-Jet Testing facility is instrumental in enhancing structural resilience under windstorms. The facility represents a Mid-Scale Research Infrastructure to address grand challenges and the need for experimental capabilities in the mid-scale range. Its unique capabilities enable the comprehensive testing and evaluation of critical infrastructure components, encompassing low- and high-rise buildings, photovoltaic (PV) solar panels, wind turbines, bridges, vegetation (nature-based solutions), power transmission lines, and more. Through controlled wind conditions, researchers can gain invaluable insights into the behaviour and performance of these critical infrastructures. The facility is pivotal …

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Experimental Evaluation Of Asphalt Mixtures With Emerging Additives Against Cracking And Moisture Damage, Md Tanvir A. Sarkar, Mostafa A. Elseifi Dec 2023

Experimental Evaluation Of Asphalt Mixtures With Emerging Additives Against Cracking And Moisture Damage, Md Tanvir A. Sarkar, Mostafa A. Elseifi

Faculty Publications

The objective of this study was to evaluate and recommend an asphalt mixture design with emerging additive technologies that would provide superior performance against asphalt concrete (AC) stripping and cracking. To achieve this objective, a laboratory test program was developed to evaluate the use of nanomaterials (nanoclay and graphene nanoplatelet), an emerging anti-stripping agent (adhere), and warm-mix asphalt technologies (ZycoTherm, Sasobit, and EvoTherm). Two mix types were evaluated, which were a stone-matrix asphalt (SMA) and a dense-graded binder mix. In addition, the modified Lottman test (AASHTO T 283) and the indirect tensile asphalt cracking test (IDEAL-CT) test were used as …

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Crystal–Melt Interfaces In Mg2sio4 At High Pressure: Structural And Energetics Insights From First-Principles Simulations, Bijaya B. Karki, Dipta B. Ghosh, Jianwei Wang, Shun Ichiro Karato Dec 2023

Crystal–Melt Interfaces In Mg2sio4 At High Pressure: Structural And Energetics Insights From First-Principles Simulations, Bijaya B. Karki, Dipta B. Ghosh, Jianwei Wang, Shun Ichiro Karato

Faculty Publications

The interplay between crystal–melt and grain boundary interfaces in partially melted polycrystalline aggregates controls many physical properties of mantle rocks. To understand this process at the fundamental level requires improved knowledge about the interfacial structures and energetics. Here, we report the results of first-principles molecular dynamics simulations of two grain boundaries of (0l1)/[100] type for tilt angles of 30.4° and 49.6° and the corresponding solid–liquid interfaces in Mg2SiO4 forsterite at the conditions of the upper mantle. Our analysis of the simulated position time series shows that structural distortions at the solid–liquid interfacial region are stronger than intergranular interfacial distortions. The …

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