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Articles 1381 - 1410 of 10789
Full-Text Articles in Entire DC Network
Dynamic Modeling Of Aba-Dependent Expression Of The Arabidopsis Rd29a Gene, Ruth Ndathe, Renee Dale, Naohiro Kato
Dynamic Modeling Of Aba-Dependent Expression Of The Arabidopsis Rd29a Gene, Ruth Ndathe, Renee Dale, Naohiro Kato
Faculty Publications
The abscisic acid (ABA) signaling pathway is the key defense mechanism against drought stress in plants. In the pathway, signal transduction among four core proteins, pyrabactin resistance (PYR), protein phosphatase 2C (PP2C), sucrose-non-fermenting-1-related protein kinase 2 (SnRK2), and ABRE binding factor (ABF) leads to altered gene expression kinetics that is driven by an ABA-responsive element (ABRE). A most recent and comprehensive study provided data suggesting that ABA alters the expression kinetics in over 6,500 genes through the ABF-ABRE associations in Arabidopsis. Of these genes, termed ABA gene regulatory network (GRN), over 50% contain a single ABRE within 4 kb of …
The Marine Gastropod Conomurex Luhuanus (Strombidae) Has High-Resolution Spatial Vision And Eyes With Complex Retinas, Allison R. Irwin, Suzanne T. Williams, Daniel Isaac Speiser, Nicholas W. Roberts
The Marine Gastropod Conomurex Luhuanus (Strombidae) Has High-Resolution Spatial Vision And Eyes With Complex Retinas, Allison R. Irwin, Suzanne T. Williams, Daniel Isaac Speiser, Nicholas W. Roberts
Faculty Publications
All species within the conch snail family Strombidae possess large camera-type eyes that are surprisingly well-developed compared with those found in most other gastropods. Although these eyes are known to be structurally complex, very little research on their visual function has been conducted. Here, we use isoluminant expanding visual stimuli to measure the spatial resolution and contrast sensitivity of a strombid, Conomurex luhuanus. Using these stimuli, we show that this species responds to objects as small as 1.06 deg in its visual field. We also show that C. luhuanus responds to Michelson contrasts of 0.07, a low contrast sensitivity …
Compositionally And Density Stratified Igneous Terrain In Jezero Crater, Mars, Roger C. Wiens, Arya Udry, Olivier Beyssac, Cathy Quantin-Nataf, Nicolas Mangold, Agnès Cousin, Lucia Mandon, Tanja Bosak, Olivier Forni, Scott M. Mclennan, Violaine Sautter, Adrian Cousin, Karim Benzerara, Jeffrey R. Johnson, Lisa Mayhew, Sylvestre Maurice, Ryan B. Maurice, Ryan B. Anderson, Samuel M. Clegg, Larry Crumpler, Stanley M. Angel
Compositionally And Density Stratified Igneous Terrain In Jezero Crater, Mars, Roger C. Wiens, Arya Udry, Olivier Beyssac, Cathy Quantin-Nataf, Nicolas Mangold, Agnès Cousin, Lucia Mandon, Tanja Bosak, Olivier Forni, Scott M. Mclennan, Violaine Sautter, Adrian Cousin, Karim Benzerara, Jeffrey R. Johnson, Lisa Mayhew, Sylvestre Maurice, Ryan B. Maurice, Ryan B. Anderson, Samuel M. Clegg, Larry Crumpler, Stanley M. Angel
Faculty Publications
Before Perseverance, Jezero crater's floor was variably hypothesized to have a lacustrine, lava, volcanic airfall, or aeolian origin. SuperCam observations in the first 286 Mars days on Mars revealed a volcanic and intrusive terrain with compositional and density stratification.The dominant lithology along the traverse is basaltic, with plagioclase enrichment in stratigraphically higher locations. Stratigraphically lower, layered rocks are richer in normative pyroxene. The lowest observed unit has the highest inferred density and is olivine-rich with coarse (1.5 millimeters) euhedral, relatively unweathered grains, suggesting a cumulate origin. This is the first martian cumulate and shows similarities to martian meteorites, which also …
Mercury Biomagnification In A Coastal Louisiana Food Web Following The 2010 Deepwater Horizon Oil Spill, Katelyn J. Lamb, Stephen R. Midway, Rebecka L. Brasso, Paola C. López-Duarte, Matthew E. Kimball, Michael J. Polito
Mercury Biomagnification In A Coastal Louisiana Food Web Following The 2010 Deepwater Horizon Oil Spill, Katelyn J. Lamb, Stephen R. Midway, Rebecka L. Brasso, Paola C. López-Duarte, Matthew E. Kimball, Michael J. Polito
Faculty Publications
The estuarine environments surrounding coastal Louisiana create favorable conditions for microbially mediated mercury (Hg) methylation and subsequent bioaccumulation by biota. In 2010, the Deepwater Horizon (DWH) oil spill released large amounts of oil which, despite having low Hg concentrations, had the potential to influence methylmercury (MeHg) bioavailability in the coastal zone. To explore this possibility, we assessed Hg concentrations and trophodynamics in the coastal Louisiana food web prior to and immediately following the DWH oil spill and compared these metrics with an adjacent coastal ecosystem in the northern Gulf of Mexico. We found no differences in MeHg concentrations between oysters …
Economically Optimizing Elevation Of New, Single-Family Residences For Flood Mitigation Via Life-Cycle Benefit-Cost Analysis, Ehab Gnan, Carol J. Friedland, Rubayet Bin Mostafiz, Md Adilur Rahim, Thanos Gentimis, Arash Taghinezhad, Robert V. Rohli
Economically Optimizing Elevation Of New, Single-Family Residences For Flood Mitigation Via Life-Cycle Benefit-Cost Analysis, Ehab Gnan, Carol J. Friedland, Rubayet Bin Mostafiz, Md Adilur Rahim, Thanos Gentimis, Arash Taghinezhad, Robert V. Rohli
Faculty Publications
Construction with freeboard—vertical height of a structure above the minimum required—is commonly accepted as a sound investment for flood hazard mitigation. However, determining the optimal height of freeboard poses a major decision problem. This research introduces a life-cycle benefit-cost analysis (LCBCA) approach for optimizing freeboard height for a new, single-family residence, while incorporating uncertainty, and, in the case of insured homes, considering the costs from losses, insurance, and freeboard (if any) to the homeowner and National Flood Insurance Program (NFIP) separately. Using a hypothetical, case study home in Metairie, Louisiana and U.S. Army Corps of Engineers design depth-damage functions for …
Impacts Of Ocean-Atmosphere Teleconnection Patterns On The South-Central United States, Robert V. Rohli, Gregg A. Snedden, Elinor R. Martin, Kristine L. Delong
Impacts Of Ocean-Atmosphere Teleconnection Patterns On The South-Central United States, Robert V. Rohli, Gregg A. Snedden, Elinor R. Martin, Kristine L. Delong
Faculty Publications
Recent research has linked the climate variability associated with ocean-atmosphere teleconnections to impacts rippling throughout environmental, economic, and social systems. This research reviews recent literature through 2021 in which we identify linkages among the major modes of climate variability, in the form of ocean-atmosphere teleconnections, and the impacts to temperature and precipitation of the South-Central United States (SCUSA), consisting of Arkansas, Louisiana, New Mexico, Oklahoma, and Texas. The SCUSA is an important areal focus for this analysis because it straddles the ecotone between humid and arid climates in the United States and has a growing population, diverse ecosystems, robust agricultural …
Future Crop Risk Estimation Due To Drought, Extreme Temperature, Hail, Lightning, And Tornado At The Census Tract Level In Louisiana, Rubayet Bin Mostafiz, Robert V. Rohli, Carol J. Friedland, Melanie Gall, Nazla Bushra
Future Crop Risk Estimation Due To Drought, Extreme Temperature, Hail, Lightning, And Tornado At The Census Tract Level In Louisiana, Rubayet Bin Mostafiz, Robert V. Rohli, Carol J. Friedland, Melanie Gall, Nazla Bushra
Faculty Publications
Louisiana is one of the most hazard-prone states in the U.S., and many of its people are engaged directly or indirectly in agricultural activities that are impacted by an array of weather hazards. However, most hazard impact research on agriculture to date, for Louisiana and elsewhere, has focused on floods and hurricanes. This research develops a method of future crop loss risk assessment due to droughts, extreme low and high temperatures, hail, lightning, and tornadoes, using Louisiana as a case study. This approach improves future crop risk assessment by incorporating historical crop loss, historical and modeled future hazard intensity, cropland …
Drift Macroalgal Distribution In Northern Gulf Of Mexico Seagrass Meadows, Kelly M. Correia, Scott B. Alford, Benjamin A. Belgrad, Kelly M. Darnell, M. Zachary Darnell, Bradley T. Furman, Margaret O. Hall, Christian T. Hayes, Charles W. Martin, Ashley M. Mcdonald, Delbert L. Smee
Drift Macroalgal Distribution In Northern Gulf Of Mexico Seagrass Meadows, Kelly M. Correia, Scott B. Alford, Benjamin A. Belgrad, Kelly M. Darnell, M. Zachary Darnell, Bradley T. Furman, Margaret O. Hall, Christian T. Hayes, Charles W. Martin, Ashley M. Mcdonald, Delbert L. Smee
Faculty Publications
Drift macroalgae, often found in clumps or mats adjacent to or within seagrass beds, can increase the value of seagrass beds as habitat for nekton via added food resources and structural complexity. But, as algal biomass increases, it can also decrease light availability, inhibit faunal movements, smother benthic communities, and contribute to hypoxia, all of which can reduce nekton abundance. We quantified the abundance and distribution of drift macroalgae within seagrass meadows dominated by turtle grass Thalassia testudinum across the northern Gulf of Mexico and compared seagrass characteristics to macroalgal biomass and distribution. Drift macroalgae were most abundant in areas …
Whole Genome Association Study Of The Plasma Metabolome Identifies Metabolites Linked To Cardiometabolic Disease In Black Individuals, Usman A. Tahir, Daniel H. Katz, Julian Avila-Pachecho, Alexander G. Bick, Akhil Pampana, Jeremy M. Robbins, Zhi Yu, Zsu-Zsu Chen, Mark D. Benson, Daniel E. Cruz, Debby Ngo, Shuliang Deng, Xu Shi, Shuning Zheng, Aaron S. Eisman, Laurie Farrell, Michael E. Hall, Adolfo Correa, Russell P. Tracy, Peter Durda, Mark A. Sarzynski Ph.D., Faha, Facsm, Et. Al.
Whole Genome Association Study Of The Plasma Metabolome Identifies Metabolites Linked To Cardiometabolic Disease In Black Individuals, Usman A. Tahir, Daniel H. Katz, Julian Avila-Pachecho, Alexander G. Bick, Akhil Pampana, Jeremy M. Robbins, Zhi Yu, Zsu-Zsu Chen, Mark D. Benson, Daniel E. Cruz, Debby Ngo, Shuliang Deng, Xu Shi, Shuning Zheng, Aaron S. Eisman, Laurie Farrell, Michael E. Hall, Adolfo Correa, Russell P. Tracy, Peter Durda, Mark A. Sarzynski Ph.D., Faha, Facsm, Et. Al.
Faculty Publications
Integrating genetic information with metabolomics has provided new insights into genes affecting human metabolism. However, gene-metabolite integration has been primarily studied in individuals of European Ancestry, limiting the opportunity to leverage genomic diversity for discovery. In addition, these analyses have principally involved known metabolites, with the majority of the profiled peaks left unannotated. Here, we perform a whole genome association study of 2,291 metabolite peaks (known and unknown features) in 2,466 Black individuals from the Jackson Heart Study. We identify 519 locus-metabolite associations for 427 metabolite peaks and validate our findings in two multi-ethnic cohorts. A significant proportion of these …
Snapping Shrimp Have Helmets That Protect Their Brains By Dampening Shock Waves, Alexandra C.N. Kingston, Sarah A. Woodin, David S. Wethey, Daniel Isaac Speiser
Snapping Shrimp Have Helmets That Protect Their Brains By Dampening Shock Waves, Alexandra C.N. Kingston, Sarah A. Woodin, David S. Wethey, Daniel Isaac Speiser
Faculty Publications
Shock waves are supersonic high-amplitude pressure waves that cause barotrauma when they transfer kinetic energy to the tissues of animals.1, 2, 3, 4 Snapping shrimp (Alpheidae) produce shock waves and are exposed to them frequently, so we asked if these animals have evolved mechanisms of physical protection against them. Snapping shrimp generate shock waves by closing their snapping claws rapidly enough to form cavitation bubbles that release energy as an audible “snap” and a shock wave when they collapse.5, 6, 7, 8 We tested if snapping shrimp are protected from shock waves by a helmet-like extension of their exoskeleton termed …
Proteomic Profiling Platforms Head To Head: Leveraging Genetics And Clinical Traits To Compare Aptamer- And Antibody-Based Methods, Daniel H. Katz, Jeremy M. Robbins, Shuliang Deng, Usman A. Tahir, Alexander G. Bick, Akhil Pampana, Zhi Yu, Debby Ngo, Mark D. Benson, Zsu-Zsu Chen, Daniel E. Cruz, Dongxiao Shen, Yan Gao, Claude Bouchard, Mark A. Sarzynski Facsm, Adolfo Correa, Pradeep Natarajan, James G. Wilson, Robert E. Gerszten
Proteomic Profiling Platforms Head To Head: Leveraging Genetics And Clinical Traits To Compare Aptamer- And Antibody-Based Methods, Daniel H. Katz, Jeremy M. Robbins, Shuliang Deng, Usman A. Tahir, Alexander G. Bick, Akhil Pampana, Zhi Yu, Debby Ngo, Mark D. Benson, Zsu-Zsu Chen, Daniel E. Cruz, Dongxiao Shen, Yan Gao, Claude Bouchard, Mark A. Sarzynski Facsm, Adolfo Correa, Pradeep Natarajan, James G. Wilson, Robert E. Gerszten
Faculty Publications
High-throughput proteomic profiling using antibody or aptamer-based affinity reagents is used increasingly in human studies. However, direct analyses to address the relative strengths and weaknesses of these platforms are lacking. We assessed findings from the SomaScan1.3K (N = 1301 reagents), the SomaScan5K platform (N = 4979 reagents), and the Olink Explore (N = 1472 reagents) profiling techniques in 568 adults from the Jackson Heart Study and 219 participants in the HERITAGE Family Study across four performance domains: precision, accuracy, analytic breadth, and phenotypic associations leveraging detailed clinical phenotyping and genetic data. Across these studies, we show evidence …
Understanding Across The Senses: Cross-Modal Studies Of Cognition In Cetaceans, Jason N. Bruck, Adam A. Pack
Understanding Across The Senses: Cross-Modal Studies Of Cognition In Cetaceans, Jason N. Bruck, Adam A. Pack
Faculty Publications
Cross-modal approaches to the study of sensory perception, social recognition, cognition, and mental representation have proved fruitful in humans as well as in a variety of other species including toothed whales in revealing equivalencies that suggest that different sensory stimuli associated with objects or individuals may effectively evoke mental representations that are, respectively, object based or individual based. Building on established findings of structural equivalence in the form of spontaneous recognition of complex shapes across the modalities of echolocation and vision and behavior favoring identity echoic–visual cross-modal relationships over associative echoic–visual cross-modal relationships, examinations of transitive inference equivalencies from initially …
All Is Perception, Robert Friedman
All Is Perception, Robert Friedman
Faculty Publications
This editorial addresses the universality and importance of the science of perception. In particular, recently published studies in this journal illustrate the natural variations in perception. These articles are a reminder of perception as a natural process with inherent variations and that any two individuals are not guaranteed to form the same representation of an object, regardless of whether it originates from the senses or not. Since perception is a foundation for higher cognition, it also has an immense influence on studies of humanity and interpretations of natural processes.
The Impact Of Dieting Culture Is Different Between Sexes In Endurance Athletes: A Cross-Sectional Analysis, Austin J. Graybeal, Andreas Kreutzer, Jada L. Willis, Robyn Braun-Trocchio, Kamiah Moss, Meena Shah
The Impact Of Dieting Culture Is Different Between Sexes In Endurance Athletes: A Cross-Sectional Analysis, Austin J. Graybeal, Andreas Kreutzer, Jada L. Willis, Robyn Braun-Trocchio, Kamiah Moss, Meena Shah
Faculty Publications
Background: Frequent dieting is common in athletes attempting to achieve a body composition perceived to improve performance. Excessive dieting may indicate disordered eating (DE) behaviors and can result in clinical eating disorders. However, the current nutrition patterns that underly dieting culture are underexplored in endurance athletes. Therefore, the purpose of this study was to identify the sex differences in nutrition patterns among a group of endurance athletes.
Methods: Two-hundred and thirty-one endurance athletes (females = 124) completed a questionnaire regarding their dieting patterns and associated variables.
Results: The majority of athletes did not follow a planned diet …
Parental Genetic Contributions To Neonatal Temperament In A Nonhuman Primate (Macaca Mulatta) Model, Elizabeth K. Wood, Jacob N. Hunter, Joseph A. Olsen, Laura Almasay, Stephen G. Lindell, David Goldman, Christina S. Barr, Stephen J. Suomi, Daniel B. Kay, James Dee Higley
Parental Genetic Contributions To Neonatal Temperament In A Nonhuman Primate (Macaca Mulatta) Model, Elizabeth K. Wood, Jacob N. Hunter, Joseph A. Olsen, Laura Almasay, Stephen G. Lindell, David Goldman, Christina S. Barr, Stephen J. Suomi, Daniel B. Kay, James Dee Higley
Faculty Publications
Temperament is an individual’s nature and is widely believed to have a heritable foundation. Few studies, however, have evaluated paternal and maternal contributions to the triadic dimensions of temperament. Rhesus monkeys are widely utilized to model genetic contributions to human development due to their close genetic-relatedness and common temperament structure, providing a powerful translational model for investigating paternal and maternal genetic influences on temperament. The temperament of rhesus monkey infants born to 19 different sires and 50 different dams was assessed during the first month of life by comparing the temperament of paternal or maternal half-siblings reared with their mothers …
Hexavalent Chromium Increases The Metabolism And Genotoxicity Of Aromatic Amine Carcinogens 4-Aminobiphenyl And Β-Naphthylamine In Immortalized Human Lung Epithelial Cells, James T.F. Wise, Raúl A. Salazar-González, Kennedy M. Walls, Mark A. Doll, Mariam R. Habil, David W. Hein
Hexavalent Chromium Increases The Metabolism And Genotoxicity Of Aromatic Amine Carcinogens 4-Aminobiphenyl And Β-Naphthylamine In Immortalized Human Lung Epithelial Cells, James T.F. Wise, Raúl A. Salazar-González, Kennedy M. Walls, Mark A. Doll, Mariam R. Habil, David W. Hein
Faculty Publications
Humans are exposed to carcinogenic chemicals via occupational and environmental exposures. Common chemicals of concern that can occur in exposures together are aromatic amines (e.g., 4-aminobiphenyl [4-ABP] and β-naphthylamine [BNA]) and hexavalent chromium (Cr[VI]). Arylamine N-acetyltransferases 1 and 2 (NAT1 and NAT2) are key to the metabolism of aromatic amines and their genotoxicity. The effects of Cr(VI) on the metabolism of aromatic amines remains unknown as well as how it may affect their ensuing toxicity. The objective of the research presented here is to investigate the effects of Cr(VI) on the metabolism and genotoxicity of 4-ABP and BNA in immortalized …
Integrated Modeling Of Dynamic Marsh Feedbacks And Evolution Under Sea-Level Rise In A Mesotidal Estuary (Plum Island, Ma, Usa), Karim Alizad, James T. Morris, Matthew V. Bilskie, Davina L. Passeri, Scott C. Hagen
Integrated Modeling Of Dynamic Marsh Feedbacks And Evolution Under Sea-Level Rise In A Mesotidal Estuary (Plum Island, Ma, Usa), Karim Alizad, James T. Morris, Matthew V. Bilskie, Davina L. Passeri, Scott C. Hagen
Faculty Publications
Around the world, wetland vulnerability to sea-level rise (SLR) depends on different factors including tidal regimes, topography, creeks and estuary geometry, sediment availability, vegetation type, etc. The Plum Island estuary (PIE) is a mesotidal wetland system on the east coast of the United States. This research applied a newly updated Hydro-MEM (integrated hydrodynamic-marsh) model to assess the impacts of intermediate-low (50 cm), intermediate (1 m), and intermediate-high (1.5 m) SLR on marsh evolution by the year 2100. Model advancements include capturing vegetation change, inorganic and below and aboveground organic matter portion of marsh platform accretion, and mudflat creation. Although the …
A Structural Equation Modeling Analysis To Explore Diabetes Self-Care Factors In A Rural Sample, Laurie Abbott, Lucinda Graven, Glenna Schluck, Jennifer Lemacks
A Structural Equation Modeling Analysis To Explore Diabetes Self-Care Factors In A Rural Sample, Laurie Abbott, Lucinda Graven, Glenna Schluck, Jennifer Lemacks
Faculty Publications
Diabetes is a public health problem that requires management to avoid health sequelae. Little is known about the determinants that influence diabetes self-care activities among rural populations. The purpose of this analysis was to explore the relationships among diabetes self-care activities, diabetes knowledge, perceived diabetes self-management, diabetes fatalism, and social support among an underserved rural group in the southern United States. A diabetes health promotion program was tested during a cluster randomized trial that tested a disease risk reduction program among adults living with prediabetes and diabetes. A structural equation model was fit to test psychosocial factors that influence diabetes …
Improved Building-Specific Flood Risk Assessment And Implications Of Depth-Damage Function Selection, Ehab Gnan, Carol J. Friedland, Md Adilur Rahim, Rubayet Bin Mostafiz, Robert V. Rohli, Fatemeh Orooji, Arash Taghinezhad, Jasmin Mcelwee
Improved Building-Specific Flood Risk Assessment And Implications Of Depth-Damage Function Selection, Ehab Gnan, Carol J. Friedland, Md Adilur Rahim, Rubayet Bin Mostafiz, Robert V. Rohli, Fatemeh Orooji, Arash Taghinezhad, Jasmin Mcelwee
Faculty Publications
Average annual loss (AAL) is traditionally used as the basis of assessing flood risk and evaluating risk mitigation measures. This research presents an improved implementation to estimate building-specific AAL, with the flood hazard of a building represented by the Gumbel extreme value distribution. AAL is then calculated by integrating the area under the overall loss-exceedance probability curve using trapezoidal Riemann sums. This implementation is compared with existing AAL estimations from flood risk assessment. A sensitivity analysis is conducted to examine the variability in AAL results based on depth-damage function (DDF) choice. To demonstrate the methodology, a one-story single-family residence is …
Liquid-Phase Effects On Adsorption Processes In Heterogeneous Catalysis, Mehdi Zare, Mohammad S. Saleheen, Nirala Singh, Mark J. Uline, Muhammad Faheem, Andreas Heyden
Liquid-Phase Effects On Adsorption Processes In Heterogeneous Catalysis, Mehdi Zare, Mohammad S. Saleheen, Nirala Singh, Mark J. Uline, Muhammad Faheem, Andreas Heyden
Faculty Publications
Aqueous solvation free energies of adsorption have recently been measured for phenol adsorption on Pt(111). Endergonic solvent effects of ∼1 eV suggest solvents dramatically influence a metal catalyst's activity with significant implications for the catalyst design. However, measurements are indirect and involve adsorption isotherm models, which potentially reduces the reliability of the extracted energy values. Computational, implicit solvation models predict exergonic solvation effects for phenol adsorption, failing to agree with measurements even qualitatively. In this study, an explicit, hybrid quantum mechanical/molecular mechanical approach for computing solvation free energies of adsorption is developed, solvation free energies of phenol adsorption are computed, …
Covid-19 In The United States As Affective Frame, John Protevi
Covid-19 In The United States As Affective Frame, John Protevi
Faculty Publications
In this paper I attempt to contribute to the developing field of “political philosophy of mind.” To render concrete the notion of “affective frame,” a social situation which pre-selects for salience and valence of environmental factors relative to a subject’s life, I conduct a case study of a deleterious socially instituted affective frame, which, during the early days of the COVID19 pandemic in the United States, produced individuated circumstances that came crashing down on “essential workers” who were forced into a double bind. We saw here an untenable and ultimately fatal situation that forced a choice between, on the one …
Just Strict Liability, Cristina Carmody Tilley
Just Strict Liability, Cristina Carmody Tilley
Faculty Publications
Theorists who contend that tort is designed to do justice cannot explain strict liability. The strict sector plagues these scholars because it extracts payment from defendants who have acted reasonably and are therefore considered innocent. If tort is about wronging and recourse, then strict liability makes no sense. Stymied, justice theorists have ceded the sector to economically minded counterparts who are concerned primarily with efficient market outcomes. As this theory has taken hold, some have declared strict liability “dead.” This Article offers a justice theory of the interpersonal wrong that permits liability in the absence of traditional fault; namely, the …
Microtopography Matters: Belowground Ch4 Cycling Regulated By Differing Microbial Processes In Peatland Hummocks And Lawns, Clarice R. Perryman, Carmody K. Mccalley, Jessica G. Ernakovich, Louis J. Lamit, Joanne H. Shorter, Erik Lilleskov, Ruth K. Varner
Microtopography Matters: Belowground Ch4 Cycling Regulated By Differing Microbial Processes In Peatland Hummocks And Lawns, Clarice R. Perryman, Carmody K. Mccalley, Jessica G. Ernakovich, Louis J. Lamit, Joanne H. Shorter, Erik Lilleskov, Ruth K. Varner
Faculty Publications
Water table depth and vegetation are key controls of methane (CH4) emissions from peatlands. Microtopography integrates these factors into features called microforms. Microforms often differ in CH4 emissions, but microform-dependent patterns of belowground CH4 cycling remain less clearly resolved. To investigate the impact of microtopography on belowground CH4 cycling, we characterized depth profiles of the community composition and activity of CH4-cycling microbes using 16S rRNA amplicon sequencing, incubations, and measurements of porewater CH4 concentration and isotopic composition from hummocks and lawns at Sallie's Fen in NH, USA. Geochemical proxies of methanogenesis and methanotrophy indicated that microforms differ in dominant microbial …
Hydrodynamic And Biochemical Impacts On The Development Of Hypoxia In The Louisiana-Texas Shelf - Part 2: Statistical Modeling And Hypoxia Prediction, Yanda Ou, Bin Li, Z. George Xue
Hydrodynamic And Biochemical Impacts On The Development Of Hypoxia In The Louisiana-Texas Shelf - Part 2: Statistical Modeling And Hypoxia Prediction, Yanda Ou, Bin Li, Z. George Xue
Faculty Publications
This study presents a novel ensemble regression model for forecasts of the hypoxic area (HA) in the Louisiana-Texas (LaTex) shelf. The ensemble model combines a zero-inflated Poisson generalized linear model (GLM) and a quasi-Poisson generalized additive model (GAM) and considers predictors with hydrodynamic and biochemical features. Both models were trained and calibrated using the daily hindcast (2007-2020) by a three-dimensional coupled hydrodynamic-biogeochemical model embedded in the Regional Ocean Modeling System (ROMS). Compared to the ROMS hindcasts, the ensemble model yields a low root-mean-square error (RMSE) (3256 km2), a high R2 (0.7721), and low mean absolute percentage biases for overall (29%) …
A New Ocean State After Nuclear War, Cheryl S. Harrison, Tyler Rohr, Alice Duvivier, Elizabeth A. Maroon, Scott Bachman, Charles G. Bardeen, Joshua Coupe, Victoria Garza, Ryan Heneghan, Nicole S. Lovenduski, Philipp Neubauer, Victor Rangel, Alan Robock, Kim Scherrer, Samantha Stevenson, Owen B. Toon
A New Ocean State After Nuclear War, Cheryl S. Harrison, Tyler Rohr, Alice Duvivier, Elizabeth A. Maroon, Scott Bachman, Charles G. Bardeen, Joshua Coupe, Victoria Garza, Ryan Heneghan, Nicole S. Lovenduski, Philipp Neubauer, Victor Rangel, Alan Robock, Kim Scherrer, Samantha Stevenson, Owen B. Toon
Faculty Publications
Nuclear war would produce dire global consequences for humans and our environment. We simulated climate impacts of US-Russia and India-Pakistan nuclear wars in an Earth System Model, here, we report on the ocean impacts. Like volcanic eruptions and large forest fires, firestorms from nuclear war would transport light-blocking aerosols to the stratosphere, resulting in global cooling. The ocean responds over two timescales: a rapid cooling event and a long recovery, indicating a hysteresis response of the ocean to global cooling. Surface cooling drives sea ice expansion, enhanced meridional overturning, and intensified ocean vertical mixing that is expanded, deeper, and longer …
Global Food Insecurity And Famine From Reduced Crop, Marine Fishery And Livestock Production Due To Climate Disruption From Nuclear War Soot Injection, Lili Xia, Alan Robock, Kim Scherrer, Cheryl S. Harrison, Benjamin Leon Bodirsky, Isabelle Weindl, Jonas Jägermeyr, Charles G. Bardeen, Owen B. Toon, Ryan Heneghan
Global Food Insecurity And Famine From Reduced Crop, Marine Fishery And Livestock Production Due To Climate Disruption From Nuclear War Soot Injection, Lili Xia, Alan Robock, Kim Scherrer, Cheryl S. Harrison, Benjamin Leon Bodirsky, Isabelle Weindl, Jonas Jägermeyr, Charles G. Bardeen, Owen B. Toon, Ryan Heneghan
Faculty Publications
Atmospheric soot loadings from nuclear weapon detonation would cause disruptions to the Earth’s climate, limiting terrestrial and aquatic food production. Here, we use climate, crop and fishery models to estimate the impacts arising from six scenarios of stratospheric soot injection, predicting the total food calories available in each nation post-war after stored food is consumed. In quantifying impacts away from target areas, we demonstrate that soot injections larger than 5 Tg would lead to mass food shortages, and livestock and aquatic food production would be unable to compensate for reduced crop output, in almost all countries. Adaptation measures such as …
Numerical Experiments Of Temperature Mixing And Post-Storm Re-Stratification Over The Louisiana Shelf During Hurricane Katrina (2005), Mohammad Nabi Allahdadi, Chunyan Li, Nazanin Chaichitehrani
Numerical Experiments Of Temperature Mixing And Post-Storm Re-Stratification Over The Louisiana Shelf During Hurricane Katrina (2005), Mohammad Nabi Allahdadi, Chunyan Li, Nazanin Chaichitehrani
Faculty Publications
Studying mixing and re-stratification during and after hurricanes have important implications for the simulation of circulation and bio-geochemical processes in oceanic and shelf waters. Numerical experiments using FVCOM on an unstructured computational mesh were implemented to study the direct effect of hurricane winds on the mixing and temperature redistribution of the stratified Louisiana shelf during Hurricane Katrina (2005), as well as the post-storm re-stratification timescale. The model was forced by Katrina’s wind stress obtained from a combination of H-Wind database and NCEP model. The climatological profiles of temperature and salinity for August (the month in which Katrina occurred) from the …
Rectifying Wrongful Convictions Through The Dormant Grand Jury Clause, Colin Miller
Rectifying Wrongful Convictions Through The Dormant Grand Jury Clause, Colin Miller
Faculty Publications
In 1995, Lamar Johnson was convicted of a murder in St. Louis. Twenty-two years later, St. Louis Circuit Attorney Kimberly Gardner created a Conviction Integrity Unit (CIU) to review possible wrongful convictions. After reviewing Johnson’s case, the CIU concluded that Johnson was innocent. Then, consistent with her special responsibility as a prosecutor to seek to remedy wrongful convictions, Gardner filed a motion for a new trial. The court, however, denied the motion, holding that there was no enabling legislation in Missouri authorizing CIUs to seek relief for wrongful convictions. Gardner is not alone in her inability to rectify wrongful convictions. …
Profile Of Commercialized Aphicides On The Survivorship And Feeding Behavior Of The Cotton Aphid, Aphis Gossypii, Flinn M. O'Hara, Jeffrey A. Davis, Daniel R. Swale
Profile Of Commercialized Aphicides On The Survivorship And Feeding Behavior Of The Cotton Aphid, Aphis Gossypii, Flinn M. O'Hara, Jeffrey A. Davis, Daniel R. Swale
Faculty Publications
The cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), is one of the most destructive agricultural pests due to photosynthate removal and horizontal transmission of plant viruses. Horizontal transmission of plant viruses by aphids occurs during distinct feeding behavioral events, such as probing for non-persistent viruses or phloem feeding for persistent viruses. We employed toxicity bioassays and electrical penetration graph (EPG) methodology to compare toxicity and quantify changes to feeding behavior and toxicity of A. gossypii after exposure to commercialized aphicides. Commercialized aphicides containing flupyradifurone, sulfoxaflor, thiamethoxam, thiamethoxam + lambda cyhalothrin, and bifenthrin induced >90% aphid mortality within 4 h of …
Architecture And Agency For Equity In Areas Beyond National Jurisdiction, Lisa M. Campbell, Robin Fail, Rebecca Horan, Leslie Acton, Jeffrey E. Blackwatters
Architecture And Agency For Equity In Areas Beyond National Jurisdiction, Lisa M. Campbell, Robin Fail, Rebecca Horan, Leslie Acton, Jeffrey E. Blackwatters
Faculty Publications
The United Nations (UN) Sustainable Development Goals (SDGs) and the UN Decade of Ocean Science for Sustainable Development (Ocean Decade) bring increased attention to various aspects of ocean governance, including equity. One of the Ocean Decade's identified challenges is to develop a sustainable and equitable ocean economy, but questions arise about how to conceptualize the multiple dimensions of equity in an ocean context. These questions become more complex as activities move away from coastal ecosystems and communities into off-shore Areas Beyond National Jurisdiction (ABNJ), where ocean resources are recognized simultaneously as unowned/open access and as common heritage. In this paper, …