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Determining Ion Activity Coefficients In Ion-Exchange Membranes With Machine Learning And Molecular Dynamics Simulations, Hishara Keshani Gallage Dona, Teslim Olayiwola, Luis A. Briceno-Mena, Christopher G. Arges, Revati Kumar, Jose A. Romagnoli Jun 2023

Determining Ion Activity Coefficients In Ion-Exchange Membranes With Machine Learning And Molecular Dynamics Simulations, Hishara Keshani Gallage Dona, Teslim Olayiwola, Luis A. Briceno-Mena, Christopher G. Arges, Revati Kumar, Jose A. Romagnoli

Faculty Publications

The activity coefficients of ions in polymeric ion-exchange membranes (IEMs) dictate the equilibrium partitioning coefficient of the ions between the membrane and the liquid. It also affects ion transport processes, such as conductivity, in ion-exchange membranes. Accurately predicting the ion activity coefficient without experimental data has been elusive as most models are empirical or semi-empirical. This work employs an embedding process that maps microscopic and macroscopic properties for modeling of ion activity coefficients in IEMs with molecular dynamics (MD) and machine learning (ML). This strategy is effective for accurately predicting activity coefficients in various IEM materials, including random copolymer and …

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Investigation Of Iron(Iii) Tetraphenylporphyrin As A Redox Flow Battery Anolyte: Unexpected Side Reactivity With The Electrolyte, Nathan H. Mitchell, Noémie Elgrishi Jun 2023

Investigation Of Iron(Iii) Tetraphenylporphyrin As A Redox Flow Battery Anolyte: Unexpected Side Reactivity With The Electrolyte, Nathan H. Mitchell, Noémie Elgrishi

Faculty Publications

Redox flow batteries (RFBs) present an opportunity to bridge the gap between the intermittent availability of green energy sources and the need for on-demand grid level energy storage. While aqueous vanadium-based redox flow batteries have been commercialized, they are limited by the constraints of using water as an electrochemical solvent. Nonaqueous redox flow battery systems can be used to produce high voltage batteries due to the larger electrochemical window in nonaqueous solvents and the ability to tune the redox properties of active materials through functionalization. Iron porphyrins, a class of organometallic macrocycles, have been the subject of many studies for …

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Cr-Containing Diamond-Like Carbon Coatings Deposited On 316 Stainless Steel Substrates: Characterization And Interfacial Fracture Toughness Measurements, N. J. Anderson, Bin Zhang, A. C. Meng, Xiaoman Zhang, K. P. Lijesh, M. M. Khonsari, W. J. Meng Jun 2023

Cr-Containing Diamond-Like Carbon Coatings Deposited On 316 Stainless Steel Substrates: Characterization And Interfacial Fracture Toughness Measurements, N. J. Anderson, Bin Zhang, A. C. Meng, Xiaoman Zhang, K. P. Lijesh, M. M. Khonsari, W. J. Meng

Faculty Publications

A series of Cr-containing hydrogenated amorphous carbon (a-C:H:Cr) coatings were deposited onto 316 stainless steel (316SS) substrates using inductively coupled plasma assisted reactive sputter deposition. Elemental Cr interlayers with different thicknesses of 100, 200, and 300 nm were deposited between a-C:H:Cr and 316SS. Detailed composition, structure, and mechanical behavior characterization of deposited a-C:H:Cr/Cr/316SS specimens were performed. Fracture toughness values of the a-C:H:Cr layer, the Cr layer, and the a-C:H:Cr/Cr/316SS interfacial regions were measured by bending of microcantilever beams with focused ion beam milled pre-notches in-situ a scanning electron microscope. Measured fracture toughness of a-C:H:Cr/Cr/316SS interfacial regions exhibits an approximately linear …

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Cycles And Dynamic Correlations Between Agricultural And Stock Markets, Junior E. Betanco Gunera Jun 2023

Cycles And Dynamic Correlations Between Agricultural And Stock Markets, Junior E. Betanco Gunera

LSU Master's Theses

This study conducts two interrelated econometric analyses; it first analyzes the cyclical relationship between stock and commodity markets and second, it studies the dynamic conditional correlation between them. The cyclical analysis uses the bandpass filter proposed by Christiano-Fitzgerald (2003) to isolate the trend component in the long-run relationship of stocks relative to commodity markets. The results show that stock and commodities have alternated in return leadership nine times during the last 151 years, three full cycles (from peak to peak) can be clearly identified, each one with an average duration of 31 years. While the COVID-19 pandemic had little impact …

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Active Colloids As Models, Materials, And Machines, Kyle J.M. Bishop, Sibani Lisa Biswal, Bhuvnesh Bharti Jun 2023

Active Colloids As Models, Materials, And Machines, Kyle J.M. Bishop, Sibani Lisa Biswal, Bhuvnesh Bharti

Faculty Publications

Active colloids use energy input at the particle level to propel persistent motion and direct dynamic assemblies. We consider three types of colloids animated by chemical reactions, time-varying magnetic fields, and electric currents. For each type, we review the basic propulsion mechanisms at the particle level and discuss their consequences for collective behaviors in particle ensembles. These microscopic systems provide useful experimental models of nonequilibrium many-body physics in which dissipative currents break time-reversal symmetry. Freed from the constraints of thermodynamic equilibrium, active colloids assemble to form materials that move, reconfigure, heal, and adapt. Colloidal machines based on engineered particles and …

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Zeolite Supported Pt For Depolymerization Of Polyethylene By Induction Heating, Bernard Whajah, Joseph N. Heil, Cameron L. Roman, James A. Dorman, Kerry M. Dooley Jun 2023

Zeolite Supported Pt For Depolymerization Of Polyethylene By Induction Heating, Bernard Whajah, Joseph N. Heil, Cameron L. Roman, James A. Dorman, Kerry M. Dooley

Faculty Publications

We demonstrate that for polyethylene depolymerization with induction heating (IH), using a bifunctional (Pt- or Pt− Sn-containing zeolite) hydrocracking catalyst, we can obtain high hydrocarbon product yields (up to 95 wt % in 2 h) at a relatively low surface temperature (375 °C) and with a tunable product distribution ranging from light gas products to gasoline- to diesel-range hydrocarbons. Four zeolite types [MFI, LTL, CHA(SSZ-13), and TON] were chosen as the supports due to their varying pore sizes and structures. These depolymerization results are obtained at atmospheric pressure and without the use of H2 and result in an alkane/alkene mixture …

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Effect Of Constrained Inter-Granular Regions On The Inverse Hall-Petch Phenomena, K. A. Darling, B. C. Hornbuckle, C. J. Marvel, V. H. Hammond, K. Solanki Jun 2023

Effect Of Constrained Inter-Granular Regions On The Inverse Hall-Petch Phenomena, K. A. Darling, B. C. Hornbuckle, C. J. Marvel, V. H. Hammond, K. Solanki

Faculty Publications

The paper makes an effort to lay out a critical assessment of grain size and its role in limiting strength gains in stable nanocrystalline (NC) metals. In particular, this study uses copper-tantalum binary alloys, in which the predominate mechanisms of grain boundary sliding and rotation are shut down, to decipher the breakdown of classical Hall-Petch behavior and its underlining mechanisms. Through varying grain sizes and tantalum concentrations, the results show Cu–Ta's strength exceeds the traditional strength limits anticipated when strictly applying smaller grain size translates to greater strength than that from the Hall-Petch relationship for NC Cu. Within this work, …

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Researching Covid To Enhance Recovery (Recover) Adult Study Protocol: Rationale, Objectives, And Design, Leora I. Horwitz, Tanayott Thaweethai, Shari B. Brosnahan, Mine S. Cicek, Megan L. Fitzgerald, Jason D. Goldman, Rachel Hess, S. L. Hodder, Vanessa L. Jacoby, Michael R. Jordan, Jerry A. Krishnan, Adeyinka O. Laiyemo, Torri D. Metz, Lauren Nichols, Rachel E. Patzer, Anisha Sekar, Nora G. Singer, Lauren E. Stiles, Barbara S. Taylor, Shifa Ahmed, Heather A. Algren, Khamal Anglin, Lisa Aponte-Soto, Hassan Ashktorab, Ingrid V. Bassett, Brahmchetna Bedi, Nahid Bhadelia, Christian Bime, Marie Abele C. Bind, Lora J. Black, Andra L. Blomkalns, Hassan Brim, Mario Castro, James Chan Jun 2023

Researching Covid To Enhance Recovery (Recover) Adult Study Protocol: Rationale, Objectives, And Design, Leora I. Horwitz, Tanayott Thaweethai, Shari B. Brosnahan, Mine S. Cicek, Megan L. Fitzgerald, Jason D. Goldman, Rachel Hess, S. L. Hodder, Vanessa L. Jacoby, Michael R. Jordan, Jerry A. Krishnan, Adeyinka O. Laiyemo, Torri D. Metz, Lauren Nichols, Rachel E. Patzer, Anisha Sekar, Nora G. Singer, Lauren E. Stiles, Barbara S. Taylor, Shifa Ahmed, Heather A. Algren, Khamal Anglin, Lisa Aponte-Soto, Hassan Ashktorab, Ingrid V. Bassett, Brahmchetna Bedi, Nahid Bhadelia, Christian Bime, Marie Abele C. Bind, Lora J. Black, Andra L. Blomkalns, Hassan Brim, Mario Castro, James Chan

Division of Basic Science Faculty Publications

Importance SARS-CoV-2 infection can result in ongoing, relapsing, or new symptoms or other health effects after the acute phase of infection; termed post-acute sequelae of SARS-CoV-2 infection (PASC), or long COVID. The characteristics, prevalence, trajectory and mechanisms of PASC are ill-defined. The objectives of the Researching COVID to Enhance Recovery (RECOVER) Multi-site Observational Study of PASC in Adults (RECOVER-Adult) are to: (1) characterize PASC prevalence; (2) characterize the symptoms, organ dysfunction, natural history, and distinct phenotypes of PASC; (3) identify demographic, social and clinical risk factors for PASC onset and recovery; and (4) define the biological mechanisms underlying PASC pathogenesis. …

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Impact Of Zein And Lignin-Plga Biopolymer Nanoparticles Used As Pesticide Nanocarriers On Soybean Growth And Yield Under Field Conditions, Colin A.R. Bonser, Jaya Borgatta, Jason C. White, Carlos E. Astete, Cristina M. Sabliov, Jeffrey A. Davis Jun 2023

Impact Of Zein And Lignin-Plga Biopolymer Nanoparticles Used As Pesticide Nanocarriers On Soybean Growth And Yield Under Field Conditions, Colin A.R. Bonser, Jaya Borgatta, Jason C. White, Carlos E. Astete, Cristina M. Sabliov, Jeffrey A. Davis

Faculty Publications

Nanoparticles are being utilized in agriculture as fertilizers, pesticides, and agrochemical-carriers. Designed to be biocompatible and degradable, biopolymer nanoparticles were developed as an alternative to metallic nanoparticles, and though safe-by-design, polymeric nanoparticles must be field-tested prior to largescale use. Several field studies were conducted to observe detrimental effects of biopolymer nanoparticles on plant growth and yield using soybean, Glycine max (L.) Merr., as a model system. Biopolymer nanoparticles made from lignin or zein were applied as seed treatments to soybean seeds or as foliar sprays (zein only) to soybean plants. Studies using biopolymer nanoparticle seed treatments (nano-STs) measured the germination …

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Subaqueous Topographic Deformation In Abandoned Delta Lobes—A Case Study In The Yellow River Delta, China, Yunfeng Zhang, Yingying Chai, Caiping Hu, Yijun Xu, Yuyan Zhou, Huanliang Chen, Zijun Li, Shenting Gang, Shuwei Zheng Jun 2023

Subaqueous Topographic Deformation In Abandoned Delta Lobes—A Case Study In The Yellow River Delta, China, Yunfeng Zhang, Yingying Chai, Caiping Hu, Yijun Xu, Yuyan Zhou, Huanliang Chen, Zijun Li, Shenting Gang, Shuwei Zheng

Faculty Publications

Reduction in river discharge and sediment load has left deltaic lobes in the world’s many river deltas starving, but knowledge of how the subaqueous topography of these abandoned subdeltas responds to environmental changes is limited. In this study, we aimed to determine the long-term dynamics of the subaqueous seabed of abandoned delta lobes to advance current knowledge. As a case study, we selected an abandoned subdelta on the Yellow River Delta of the Bohai Sea, China, for which three-decade long (1984–2017) bathymetric data and long-term river discharge and sediment load records are available. We analyzed the seafloor surface change and …

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Indirect Functional Effects Of Neighbors On Food Web Compartments Could Not Overcome Density-Dependent Limited Growth Of A Grazing Minnow, Garrett W. Hopper, Keith B. Gido, Caryn C. Vaughn Jun 2023

Indirect Functional Effects Of Neighbors On Food Web Compartments Could Not Overcome Density-Dependent Limited Growth Of A Grazing Minnow, Garrett W. Hopper, Keith B. Gido, Caryn C. Vaughn

Faculty Publications

Ecosystems include diverse taxonomic and functional groups of animals with variable levels of niche overlap that can lead to direct and indirect interactions with positive or negative outcomes. Species feeding at low trophic positions might be sensitive to interactions with co-occurring functional groups (neighbors) that influence their food resources through various processes, such as indirect nutrient subsidies and trophic cascades. Employing a target-neighbor experimental design using large, outdoor mesocosms, we tested whether adding neighbors with different functional traits affected food web compartments relative to a control group that had grazing minnows, Campostoma anomalum (Central Stoneroller). Additionally, we tested whether growth …

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A Delayed Intervention Start Randomized Controlled Trial Of High- And Low-Tech Communication Training Approaches For School-Age Autistic Children With Co-Occurring Intellectual Disability, Shawn P. Gilroy, Joseph P. Mccleery, Geraldine Leader Jun 2023

A Delayed Intervention Start Randomized Controlled Trial Of High- And Low-Tech Communication Training Approaches For School-Age Autistic Children With Co-Occurring Intellectual Disability, Shawn P. Gilroy, Joseph P. Mccleery, Geraldine Leader

Faculty Publications

The researchers designed a delayed intervention start randomized controlled trial to compare improvements in functional communication following augmentative and alternative communication (AAC) interventions. The study compared outcomes from function-based applied behavior analytic (ABA) and eclectic non-ABA forms of classroom-based communication strategies (waitlist control) as well as from high- and low-tech forms of AAC. High-tech AAC consisted of tablet-based communication, and low-tech AAC used an exchange of picture cards. The community-based sample consisted of 29 autistic children with a co-occurring intellectual disability. Participants were randomized to groups (AAC, waitlist control), and each group received approximately 3 months of communication intervention. Multilevel …

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Immune Genotypes, Immune Responses, And Survival In A Wild Bird Population, Martha J. Nelson-Flower, Leanne A. Grieves, Jane M. Reid, Ryan R. Germain, Savo Lazic, Sabrina S. Taylor, Elizabeth A. Macdougall-Shackleton, Peter Arcese Jun 2023

Immune Genotypes, Immune Responses, And Survival In A Wild Bird Population, Martha J. Nelson-Flower, Leanne A. Grieves, Jane M. Reid, Ryan R. Germain, Savo Lazic, Sabrina S. Taylor, Elizabeth A. Macdougall-Shackleton, Peter Arcese

Faculty Publications

Individuals vary in their immune genotype, inbreeding coefficient f, immune responses, survival to adulthood, and adult longevity. However, whether immune genes predict survival or longevity, whether such relationships are mediated through immune responses, and how f affects immune genotype remain unclear. We use a wild song sparrow (Melospiza melodia) population in which survival to adulthood, adult longevity, and f were measured precisely, and in which immune responses have previously been assessed. We investigate four toll-like receptor (TLR) and the major histocompatibility complex (MHC) class IIB exon 2 genes. We test whether immune genes predict fitness (survival to adulthood or adult …

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Molecular Research In Rice, Prasanta K. Subudhi Jun 2023

Molecular Research In Rice, Prasanta K. Subudhi

Faculty Publications

No abstract provided.

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Regional Neuroanatomic Effects On Brain Age Inferred Using Magnetic Resonance Imaging And Ridge Regression, Roy J. Massett, Alexander S. Maher, Phoebe E. Imms, Anar Amgalan, Nikhil N. Chaudhari, Nahian F. Chowdhury, Andrei Irimia, Michael W. Weiner, Paul Aisen, Ronald Petersen, Clifford R. Jack, William Jagust, John Q. Trojanowki, Arthur W. Toga, Laurel Beckett, Robert C. Green, Andrew J. Saykin, John C. Morris, Richard J. Perrin, Leslie M. Shaw, Zaven Khachaturian, Maria Carrillo, William Potter, Lisa Barnes, Marie Bernard, Hector González, Carole Ho, John K. Hsiao, Jonathan Jackson, Eliezer Masliah, Donna Masterman, Ozioma Okonkwo, Laurie Ryan, Nina Silverberg Jun 2023

Regional Neuroanatomic Effects On Brain Age Inferred Using Magnetic Resonance Imaging And Ridge Regression, Roy J. Massett, Alexander S. Maher, Phoebe E. Imms, Anar Amgalan, Nikhil N. Chaudhari, Nahian F. Chowdhury, Andrei Irimia, Michael W. Weiner, Paul Aisen, Ronald Petersen, Clifford R. Jack, William Jagust, John Q. Trojanowki, Arthur W. Toga, Laurel Beckett, Robert C. Green, Andrew J. Saykin, John C. Morris, Richard J. Perrin, Leslie M. Shaw, Zaven Khachaturian, Maria Carrillo, William Potter, Lisa Barnes, Marie Bernard, Hector González, Carole Ho, John K. Hsiao, Jonathan Jackson, Eliezer Masliah, Donna Masterman, Ozioma Okonkwo, Laurie Ryan, Nina Silverberg

Clinical Research Faculty Publications

The biological age of the brain differs from its chronological age (CA) and can be used as biomarker of neural/cognitive disease processes and as predictor of mortality. Brain age (BA) is often estimated from magnetic resonance images (MRIs) using machine learning (ML) that rarely indicates how regional brain features contribute to BA. Leveraging an aggregate training sample of 3 418 healthy controls (HCs), we describe a ridge regression model that quantifies each region’s contribution to BA. After model testing on an independent sample of 651 HCs, we compute the coefficient of partial determination R̄2p for each regional brain volume to …

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Alkali-Silica Reaction Mitigation Using Alternative Supplementary Cementitious Materials, Craig Newtson, Judit M. Garcia, Seyedsaleh Mousavinezhad Jun 2023

Alkali-Silica Reaction Mitigation Using Alternative Supplementary Cementitious Materials, Craig Newtson, Judit M. Garcia, Seyedsaleh Mousavinezhad

Data

Over the past few decades, Class F fly ash has been widely used in concrete as a supplementary cementitious material (SCM) due, in part, to its ability to mitigate alkali-silica reaction (ASR). However, future availability of fly ash is uncertain as the energy industry shifts towards renewable sources, resulting in the closure of coal-burning power plants. Therefore, there is a growing need to find alternatives to fly ash that are both cost effective and environmentally friendly. This study aimed to evaluate the effectiveness of ground-granulated blast furnace slag (GGBFS), metakaolin, and a locally available natural pozzolan mined from a pumicite …

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Accelerated Sulfate Attack Testing For Concrete, Craig Newtson, Seyedsaleh Mousavinezhad, William Toledo, Federico Aguayo Jun 2023

Accelerated Sulfate Attack Testing For Concrete, Craig Newtson, Seyedsaleh Mousavinezhad, William Toledo, Federico Aguayo

Data

Extensive research has been conducted on sulfate attack of concrete structures, however, the need to adopt use of more sustainable materials is driving a need for a quicker test method to assess sulfate resistance. Class F fly ash, which is a byproduct of coal combustion for electricity generation, has historically been used in concrete mixtures to improve sulfate resistance. However, environmental considerations and evolving energy industry has decreased its availability, requiring the identification of economically viable and environmentally friendly alternatives to fly ash. Another challenge in addressing sulfate attack durability issues in concrete is that the standard sulfate attack test …

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Alkali-Silica Reaction Mitigation Using Alternative Supplementary Cementitious Materials, Craig Newtson, Judit M. Garcia, Seyedsaleh Mousavinezhad Jun 2023

Alkali-Silica Reaction Mitigation Using Alternative Supplementary Cementitious Materials, Craig Newtson, Judit M. Garcia, Seyedsaleh Mousavinezhad

Publications

Over the past few decades, Class F fly ash has been widely used in concrete as a supplementary cementitious material (SCM) due, in part, to its ability to mitigate alkali-silica reaction (ASR). However, future availability of fly ash is uncertain as the energy industry shifts towards renewable sources, resulting in the closure of coal-burning power plants. Therefore, there is a growing need to find alternatives to fly ash that are both cost effective and environmentally friendly. This study aimed to evaluate the effectiveness of ground-granulated blast furnace slag (GGBFS), metakaolin, and a locally available natural pozzolan mined from a pumicite …

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Accelerated Sulfate Attack Testing For Concrete, Craig Newtson, Seyedsaleh Mousavinezhad, William Toledo, Federico Aguayo Jun 2023

Accelerated Sulfate Attack Testing For Concrete, Craig Newtson, Seyedsaleh Mousavinezhad, William Toledo, Federico Aguayo

Publications

Extensive research has been conducted on sulfate attack of concrete structures, however, the need to adopt use of more sustainable materials is driving a need for a quicker test method to assess sulfate resistance. Class F fly ash, which is a byproduct of coal combustion for electricity generation, has historically been used in concrete mixtures to improve sulfate resistance. However, environmental considerations and evolving energy industry has decreased its availability, requiring the identification of economically viable and environmentally friendly alternatives to fly ash. Another challenge in addressing sulfate attack durability issues in concrete is that the standard sulfate attack test …

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Quantum Fluctuations Spatial Mode Profiler, Charris Gabaldon, Pratik Barge, Savannah L. Cuozzo, Irina Novikova, Hwang Lee, Lior Cohen, Eugeniy E. Mikhailov Jun 2023

Quantum Fluctuations Spatial Mode Profiler, Charris Gabaldon, Pratik Barge, Savannah L. Cuozzo, Irina Novikova, Hwang Lee, Lior Cohen, Eugeniy E. Mikhailov

Faculty Publications

The spatial mode is an essential component of an electromagnetic field description, yet it is challenging to characterize it for optical fields with the low average photon number, such as in a squeezed vacuum. We present a method for the reconstruction of the spatial modes of such fields based on the homodyne measurements of their quadrature noise variance performed with a set of structured masks. We show theoretically that under certain conditions, we can recover individual spatial mode distributions by using the weighted sum of the basis masks, where weights are determined using measured variance values and phases. We apply …

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Systematic Kmtnet Planetary Anomaly Search. Viii. Complete Sample Of 2019 Subprime Field Planets, Youn Kil Jung, Weicheng Zang, Hanyue Wang, Cheongho Han, Andrew Gould, Andrzej Udalski, Wei Zhu, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Dan Maoz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek Jun 2023

Systematic Kmtnet Planetary Anomaly Search. Viii. Complete Sample Of 2019 Subprime Field Planets, Youn Kil Jung, Weicheng Zang, Hanyue Wang, Cheongho Han, Andrew Gould, Andrzej Udalski, Wei Zhu, Michael D. Albrow, Sun Ju Chung, Kyu Ha Hwang, Yoon Hyun Ryu, In Gu Shin, Yossi Shvartzvald, Hongjing Yang, Jennifer C. Yee, Sang Mok Cha, Dong Jin Kim, Seung Lee Kim, Chung Uk Lee, Dong Joo Lee, Yongseok Lee, Byeong Gon Park, Richard W. Pogge, Dan Maoz, Michał K. Szymański, Jan Skowron, Radek Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek

Faculty Publications

We complete the publication of all microlensing planets (and “possible planets”) identified by the uniform approach of the KMT AnomalyFinder system in the 21 KMT subprime fields during the 2019 observing season, namely, KMT-2019-BLG-0298, KMT-2019-BLG-1216, KMT-2019-BLG-2783, OGLE-2019-BLG-0249, and OGLE-2019-BLG-0679 (planets), as well as OGLE-2019-BLG-0344 and KMT-2019-BLG-0304 (possible planets). The five planets have mean log mass ratio measurements of (−2.6, −3.6, −2.5, −2.2, −2.3), median mass estimates of (1.81, 0.094, 1.16, 7.12, 3.34) M Jup, and median distance estimates of (6.7, 2.7, 5.9, 6.4, 5.6) kpc, respectively. The main scientific interest of these planets is that they complete the AnomalyFinder sample …

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Effects Of Yogurt With Carao (Cassia Grandis) On Intestinal Barrier Dysfunction, Α-Glycosidase Activity, Lipase Activity, Hypoglycemic Effect, And Antioxidant Activity, Ricardo S. Aleman, Jhunior Marcia, Ryan Page, Shirin Kazemzadeh Pournaki, Daniel Martín-Vertedor, Víctor Manrique-Fernández, Ismael Montero-Fernández, Kayanush Aryana Jun 2023

Effects Of Yogurt With Carao (Cassia Grandis) On Intestinal Barrier Dysfunction, Α-Glycosidase Activity, Lipase Activity, Hypoglycemic Effect, And Antioxidant Activity, Ricardo S. Aleman, Jhunior Marcia, Ryan Page, Shirin Kazemzadeh Pournaki, Daniel Martín-Vertedor, Víctor Manrique-Fernández, Ismael Montero-Fernández, Kayanush Aryana

Faculty Publications

Cell inflammation disrupts intestinal barrier functions and may cause disorders related to a leaky gut, possibly leading to diabetes. The objective of this study was to determine if carao (Cassia grandis) incorporated into yogurt enhances in vitro intestinal barrier function. To achieve this goal, Caco-2 cells were used as a model of intestinal barrier permeability. Caco-2 cells were treated with cytokines (interleukin-1β, tumor necrosis factor-α, interferon-γ, and lipopolysaccharide (LPS)) and yogurt with carao yogurt (CY) at different doses (1.3 g/L, 2.65 g/L, and 5.3 g/L). Real-time quantitative polymerase chain and immunofluorescence microscopy were applied to evaluate the expression and localization …

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Constraints On The Timing Of The India-Asia Collision And Unroofing History Of The Himalayan Orogen Using Detrital Zircon U-Pb-Hf And Whole-Rock Sr-Nd Isotopes In Cretaceous-Miocene Lesser Himalayan Sedimentary Rocks, Wei Feng, Qingquan Meng, Chunhui Song, Xiaomin Fang, Guangsheng Zhuang, Pengju He, Shufen Yang, Jing Zhang, Yongfa Chen, Yihu Zhang Jun 2023

Constraints On The Timing Of The India-Asia Collision And Unroofing History Of The Himalayan Orogen Using Detrital Zircon U-Pb-Hf And Whole-Rock Sr-Nd Isotopes In Cretaceous-Miocene Lesser Himalayan Sedimentary Rocks, Wei Feng, Qingquan Meng, Chunhui Song, Xiaomin Fang, Guangsheng Zhuang, Pengju He, Shufen Yang, Jing Zhang, Yongfa Chen, Yihu Zhang

Faculty Publications

Cretaceous-Miocene sedimentary rocks in the Nepalese Lesser Himalaya provide an opportunity to decipher the timing of India-Asia collision and unroofing history of the Himalayan orogen, which are significant for understanding the growth processes of the Himalayan-Tibetan orogen. Our new data indicate that detrital zircon ages and whole-rock Sr-Nd isotopes in Cretaceous-Miocene Lesser Himalayan sedimentary rocks underwent two significant changes. First, from the Upper Cretaceous-Palaeocene Amile Formation to the Eocene Bhainskati Formation, the proportion of late Proterozoic-early Palaeozoic zircons (quantified by an index of 500–1200 Ma/1600–2800 Ma) increased from nearly 0 to 0.7–1.4, and the percentage of Mesozoic zircons decreased from …

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Thermoset Polymer Composites With Gradient Natural And Synthetic Fiber Reinforcement: Self-Healing, Shape-Memory, And Fiber Recyclability, Sakil Mahmud, John Konlan, Jenny Deicaza, Rachel Anna Schmidt, Guoqiang Li Jun 2023

Thermoset Polymer Composites With Gradient Natural And Synthetic Fiber Reinforcement: Self-Healing, Shape-Memory, And Fiber Recyclability, Sakil Mahmud, John Konlan, Jenny Deicaza, Rachel Anna Schmidt, Guoqiang Li

Faculty Publications

Natural fibers have high potential as renewable reinforcement for polymers; however, their lower load-carrying capacity compared to synthetic fibers significantly limits the wide application in fiber-reinforced polymer composites. In laminated composite beams under bending load, the normal stress is the highest on the top and bottom layers but is zero at the mid-plane, with almost a linear normal strain distribution. Although the shear stress is the highest at the mid-plane, it may not be a major concern as most polymers can survive the high shear stress. Using this concept, we have designed a hybrid fiber reinforcement in a gradient manner: …

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Near-Term Impact Of Covid-19 Pandemic On Seniors’ Crash Size And Severity, Saba Doulabi, Hany M. Hassan Jun 2023

Near-Term Impact Of Covid-19 Pandemic On Seniors’ Crash Size And Severity, Saba Doulabi, Hany M. Hassan

Faculty Publications

Recent research revealed that COVID-19 pandemic was associated with noticeable changes in travel demand, traffic volumes, and traffic safety measures. Despite the reduction of traffic volumes across the US, several recent studies indicated that crash rates increased across different states during COVID-19 pandemic. Although some recent studies have focused on examining the changes in traffic conditions and crash rates before and during the pandemic, not enough research has been conducted to identify risk factors to crash severity. Even the limited research addressing the contributing factors to crash severity were focused on the pool category of drivers and no insight is …

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On The Characteristics Of Fatigue Fracture With Rapid Frequency Change, Mohammad A. Amooie, K. P. Lijesh, Ali Mahmoudi, Elaheh Azizian-Farsani, Michael M. Khonsari Jun 2023

On The Characteristics Of Fatigue Fracture With Rapid Frequency Change, Mohammad A. Amooie, K. P. Lijesh, Ali Mahmoudi, Elaheh Azizian-Farsani, Michael M. Khonsari

Faculty Publications

The effect of sudden variations in working modes and fatigue behavior of CS 1018 is studied. A general model based on the framework of the fracture fatigue entropy (FFE) concept is developed to capture such changes. Fully reversed bending tests are performed on flat dog bone specimens with a series of variable frequency tests without turning the machine off to simulate fluctuating working conditions. The results are then post-processed and analyzed to assess how fatigue life changes when a component is subjected to sudden changes in multiple frequencies. It is demonstrated that regardless of the frequency changes, FFE remains constant …

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Rapid Evaluation Of Fatigue Limit Using Energy Dissipation, Ali Mahmoudi, Michael M. Khonsari Jun 2023

Rapid Evaluation Of Fatigue Limit Using Energy Dissipation, Ali Mahmoudi, Michael M. Khonsari

Faculty Publications

Four different experimental approaches for rapid estimation of fatigue limit (endurance limit) based on energy dissipation during cyclic loading are discussed. The presented approaches use energy dissipation and thermography and can reliably evaluate the fatigue limit of material by conducting the fatigue test on a single specimen. Results show that the released energy due to damage accumulation at the stress levels above the fatigue limit changes the trend of energy dissipation and that this trend can be used to predict the fatigue limit. Experimental results on CS 1018 and SS 304 specimens are presented to illustrate the utility of the …

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Feature Extraction Techniques For Noisy Distributed Acoustic Sensor Data Acquired In A Wellbore, Jagadeeshwar Tabjula, Jyotsna Sharma Jun 2023

Feature Extraction Techniques For Noisy Distributed Acoustic Sensor Data Acquired In A Wellbore, Jagadeeshwar Tabjula, Jyotsna Sharma

Faculty Publications

The distributed acoustic sensor (DAS) is a promising technology for real-time monitoring of wellbores and other infrastructures. However, the desired signals are often overwhelmed by background and environmental noise inherent in field applications. We present a suite of computationally inexpensive techniques for the real-time extraction of the gas signatures from noisy DAS data acquired in a 5163 ft. deep wellbore. The techniques are implemented on three well-scale DAS datasets, each representing multiphase flow conditions with different gas injection volumes, fluid circulation rates, and injection methods. The proposed denoising techniques not only helped in optimizing the gas slug signature despite the …

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The Coralhydro2k Database: A Global, Actively Curated Compilation Of Coral Δ18o And Sr/Ca Proxy Records Of Tropical Ocean Hydrology And Temperature For The Common Era, Rachel M. Walter, Hussein R. Sayani, Thomas Felis, Kim M. Cobb, Nerilie J. Abram, Ariella K. Arzey, Alyssa R. Atwood, Logan D. Brenner, Émilie P. Dassié, Kristine L. Delong, Bethany Ellis, Julien Emile-Geay, Matthew J. Fischer, Nathalie F. Goodkin, Jessica A. Hargreaves, K. Halimeda Kilbourne, Hedwig Krawczyk, Nicholas P. Mckay, Andrea L. Moore, Sujata A. Murty, Maria Rosabelle Ong, Riovie D. Ramos, Emma V. Reed, Dhrubajyoti Samanta, Sara C. Sanchez, Jens Zinke May 2023

The Coralhydro2k Database: A Global, Actively Curated Compilation Of Coral Δ18o And Sr/Ca Proxy Records Of Tropical Ocean Hydrology And Temperature For The Common Era, Rachel M. Walter, Hussein R. Sayani, Thomas Felis, Kim M. Cobb, Nerilie J. Abram, Ariella K. Arzey, Alyssa R. Atwood, Logan D. Brenner, Émilie P. Dassié, Kristine L. Delong, Bethany Ellis, Julien Emile-Geay, Matthew J. Fischer, Nathalie F. Goodkin, Jessica A. Hargreaves, K. Halimeda Kilbourne, Hedwig Krawczyk, Nicholas P. Mckay, Andrea L. Moore, Sujata A. Murty, Maria Rosabelle Ong, Riovie D. Ramos, Emma V. Reed, Dhrubajyoti Samanta, Sara C. Sanchez, Jens Zinke

Faculty Publications

The response of the hydrological cycle to anthropogenic climate change, especially across the tropical oceans, remains poorly understood due to the scarcity of long instrumental temperature and hydrological records. Massive shallow-water corals are ideally suited to reconstructing past oceanic variability as they are widely distributed across the tropics, rapidly deposit calcium carbonate skeletons that continuously record ambient environmental conditions, and can be sampled at monthly to annual resolution. Climate reconstructions based on corals primarily use the stable oxygen isotope composition (δ18O), which acts as a proxy for sea surface temperature (SST), and the oxygen isotope composition of seawater (δ18Osw), a …

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Progress Toward A Comprehensive Model For Mass Transfer In Structured Packings, Jack Wilfert, Brian F. Hanley May 2023

Progress Toward A Comprehensive Model For Mass Transfer In Structured Packings, Jack Wilfert, Brian F. Hanley

Faculty Publications

Significant effort has been devoted to the study of mass transfer in sheet metal structured packings over the past half century. A number of mass transfer correlations have appeared in the literature as a result of those efforts. Unfortunately, none of these correlations has shown itself to be reliable over the full range of chemical systems, column operating conditions, and packing topologies encountered today. In an attempt to rectify some of the shortcomings of earlier correlations for sheet metal structured packings, we have employed a new data analysis methodology which simultaneously fits «HETP»data and mass transfer area data. The correlation …

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