215 results on '"Ben, S"'
Search Results
2. Logistic Regression Analysis on the Dietary Behavior and the Risk of Nutritional Deficiency Dermatosis: The Case of Bicol Region, Philippines
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Temones, John Ben S
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Quantitative Biology - Quantitative Methods ,logistic regression - Abstract
This study aimed at exploring the relationship between dietary behavior and the risk of nutritional deficiency dermatoses (NDD) in the Bicol region of the Philippines, where malnutrition remains a public health concern. In particular, this study employed regression analysis in an existing data from the Food and Nutrition Research Institute (FNRI) and investigated food purchase patterns on specific food groups such as cereal products, meat products, and dairy products to assess riboflavin intake among Bicolano households, which is a key contributor in the development of dermatosis. Findings revealed that the prevalence of nutritional deficiency dermatosis risk in Bicolanos is at 15.75%, with Masbate and Camarines Sur collectively contributing more than half of these cases. This can be traced to their dependence to rice (at most 1590.93 g/day) and plant-based diet (523.30 g/day) based on their daily food purchase, which were further found to significantly reduce the odds of NDD by 0.3% for every additional gram of purchase even when they are not notably rich in riboflavin. Fish products, together with typical sources of riboflavin such as meat, eggs, poultry, and dairy products were found to significantly reduce the odds of NDD by at most 3% per additional gram of purchase. The logistic regression model showed good fit, with significant Nagelkerke value of 0.765, with performance metrics showing overall accuracy of 94.1% and precision of 84.5%. Model suggests the need for nutrition interventions, with emphasis on the promotion of enriched variety of rice, improved access to agricultural markets with products rich in riboflavin, and public health strategies such as food diversity education which will enable Bicolanos to have sufficient amount of riboflavin in their body, thereby reducing the discomfort brought about by dermatosis and its other potential health consequences., Comment: 11 pages
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- 2024
3. Bridging Scales: Coupling the galactic nucleus to the larger cosmic environment
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Su, Kung-Yi, Natarajan, Priyamvada, Cho, Hyerin, Narayan, Ramesh, Hopkins, Philip F., Anglés-Alcázar, Daniel, and Prather, Ben S.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
Coupling black hole (BH) feeding and feedback involves interactions across vast spatial and temporal scales that is computationally challenging. Tracking gas inflows and outflows from kilo-parsec scales to the event horizon for non-spinning BHs in the presence of strong magnetic fields, Cho et al. (2023, 2024) report strong suppression of accretion on horizon scales and low (2%) feedback efficiency. In this letter, we explore the impact of these findings for the supermassive BHs M87* and Sgr A*, using high-resolution, non-cosmological, magnetohydrodynamic (MHD) simulations with the Feedback In Realistic Environments (FIRE-2) model. With no feedback, we find rapid BH growth due to "cooling flows," and for 2% efficiency feedback, while accretion is suppressed, the rates still remain higher than constraints from Event Horizon Telescope (EHT) data (Event Horizon Telescope Collaboration et al. 2021, 2022) for M87* and Sgr A*. To match EHT observations of M87*, a feedback efficiency greater than 15% is required, suggesting the need to include enhanced feedback from BH spin. Similarly, a feedback efficiency of $>15\%$ is needed for Sgr A* to match the estimated observed star formation rate of $\lesssim 2 {\rm M_\odot}$ yr$^{-1}$. However, even with 100% feedback efficiency, the accretion rate onto Sgr A* matches with EHT data only on rare occasions in the simulations, suggesting that Sgr A* is likely in a temporary quiescent phase currently. Bridging accretion and feedback across scales, we conclude that higher feedback efficiency, possibly due to non-zero BH spin, is necessary to suppress "cooling flows" and match observed accretion and star formation rates in M87* and Sgr A*., Comment: 13 pages, 4 figures
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- 2024
4. A structure-preserving discontinuous Galerkin scheme for the Cahn-Hilliard equation including time adaptivity
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Wimmer, Golo A., Southworth, Ben S., and Tang, Qi
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Mathematics - Numerical Analysis - Abstract
We present a novel spatial discretization for the Cahn-Hilliard equation including transport. The method is given by a mixed discretization for the two elliptic operators, with the phase field and chemical potential discretized in discontinuous Galerkin spaces, and two auxiliary flux variables discretized in a divergence-conforming space. This allows for the use of an upwind-stabilized discretization for the transport term, while still ensuring a consistent treatment of structural properties including mass conservation and energy dissipation. Further, we couple the novel spatial discretization to an adaptive time stepping method in view of the Cahn-Hilliard equation's distinct slow and fast time scale dynamics. The resulting implicit stages are solved with a robust preconditioning strategy, which is derived for our novel spatial discretization based on an existing one for continuous Galerkin based discretizations. Our overall scheme's accuracy, robustness, efficient time adaptivity as well as structure preservation and stability with respect to advection dominated scenarios are demonstrated in a series of numerical tests., Comment: 24 pages, 4 figures
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- 2024
5. A Geometric Perspective on Kinetic Matter-Radiation Interaction and Moment Systems
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Tran, Brian K., Burby, Joshua W., and Southworth, Ben S.
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Mathematical Physics - Abstract
We provide a geometric perspective on the kinetic interaction of matter and radiation, based on a metriplectic approach. We discuss the interaction of kinetic theories via dissipative brackets, with our fundamental example being the coupling of matter, described by the Boltzmann equation, and radiation, described by the radiation transport equation. We explore the transition from kinetic systems to their corresponding moment systems, provide a Hamiltonian description of such moment systems, and give a geometric interpretation of the moment closure problem for kinetic theories. As applications, we discuss in detail diffusion radiation hydrodynamics as an example of a geometric moment closure of kinetic matter-radiation interaction and additionally, we apply the variable moment closure framework of Burby (2023) to derive novel Hamiltonian moment closures for pure radiation transport and discuss an interesting connection to the Hamiltonian fluid closures derived by Burby (2023).
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- 2024
6. KHARMA: Flexible, Portable Performance for GRMHD
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Prather, Ben S.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
KHARMA (an acronym for "Kokkos-based High-Accuracy Relativistic Magnetohydrodynamics with Adaptive mesh refinement") is a new open-source code for conducting general-relativistic magnetohydrodynamic simulations in stationary spacetimes, primarily of accretion systems. It implements among other options the High-Accuracy Relativistic Magnetohydrodynamics (HARM) scheme, but is written from scratch in C++ with the Kokkos programming model in order to run efficiently on both CPUs and GPUs. In addition to being fast, KHARMA is written to be readable, modular, and extensible, separating functionality into "packages," representing, e.g., algorithmic components or physics extensions. Components of the core ideal GRMHD scheme can be swapped at runtime, and additional packages are included to simulate electron temperature evolution, viscous hydrodynamics, and for designing chained multi-scale "bridged" simulations. This chapter presents the computational environment and requirements for KHARMA, features and design which meet these requirements, and finally, validation and performance data., Comment: Chapter submitted to "New Frontiers in GRMHD Simulations of Accreting Black Holes," Springer Nature Singapore, ed. Cosimo Bambi, Yosuke Mizuno, Swarnim Shashank and Feng Yuan. Document released under LA-UR-23-23232
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- 2024
7. Circular Polarization of Simulated Images of Black Holes
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Joshi, Abhishek V., Prather, Ben S., Chan, Chi-kwan, Wielgus, Maciek, and Gammie, Charles F.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
Models of the resolved Event Horizon Telescope (EHT) sources Sgr A* and M87* are constrained by observations at multiple wavelengths, resolutions, polarizations, and time cadences. In this paper we compare unresolved circular polarization (CP) measurements to a library of models, where each model is characterized by a distribution of CP over time. In the library we vary the spin of the black hole, the magnetic field strength at the horizon (i.e. both SANE and MAD models), the observer inclination, a parameter for the maximum ion-electron temperature ratio assuming a thermal plasma, and the direction of the magnetic field dipole moment. We find that ALMA observations of Sgr A* are inconsistent with all edge-on ($i = 90^\circ$) models. Restricting attention to the magnetically arrested disk (MAD) models favored by earlier EHT studies of Sgr A*, we find that only models with magnetic dipole moment pointing away from the observer are consistent with ALMA data. We also note that in 26 of the 27 passing MAD models the accretion flow rotates clockwise on the sky. We provide a table of the mean and standard deviation of the CP distributions for all model parameters along with their trends., Comment: 33 pages, 17 figures, 2 tables. Accepted for publication in ApJ
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- 2024
8. Multi-Zone Modeling of Black Hole Accretion and Feedback in 3D GRMHD: Bridging Vast Spatial and Temporal Scales
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Cho, Hyerin, Prather, Ben S., Su, Kung-Yi, Narayan, Ramesh, and Natarajan, Priyamvada
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
Simulating accretion and feedback from the horizon scale of supermassive black holes (SMBHs) out to galactic scales is challenging because of the vast range of scales involved. Elaborating on \citet{Cho2023}, we describe and test a ``multi-zone'' technique which is designed to tackle this difficult problem in 3D general relativistic magnetohydrodynamic (GRMHD) simulations. While short-timescale variability should be interpreted with caution, the method is demonstrated to be well-suited for finding dynamical steady-states over a wide dynamic range. We simulate accretion on a non-spinning SMBH ($a_*=0$) using initial conditions and the external galactic potential from a large scale galaxy simulation, and achieve steady state over 8 decades in radius. As found in \citet{Cho2023}, the density scales with radius as $\rho \propto r^{-1}$ inside the Bondi radius $R_B$, which is located at $R_B=2\times 10^5 \,r_g$ ($\approx 60\,{\rm pc}$ for M87) where $r_g$ is the gravitational radius of the SMBH; the plasma-$\beta\sim$ unity, indicating an extended magnetically arrested state; the mass accretion rate $\dot{M}$ is $\approx 1\%$ of the analytical Bondi accretion rate $\dot{M}_B$; and there is continuous energy feedback out to $\approx 100R_B$ (or beyond $>\,{\rm kpc}$) at a rate $\approx 0.02 \dot{M}c^2$. Surprisingly, no ordered rotation in the external medium survives as the magnetized gas flows to smaller radii, and the final steady solution is very similar to when the exterior has no rotation. Using the multi-zone method, we simulate GRMHD accretion over a wide range of Bondi radii, $R_{\rm B} \sim 10^2 - 10^7\,r_{\rm g}$, and find that $\dot{M}/\dot{M}_B\approx (R_B/6\, r_g)^{-0.5}$., Comment: 21 pages, 9 figures, submitted to ApJ
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- 2024
9. Consistent Second Moment Methods with Scalable Linear Solvers for Radiation Transport
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Olivier, Samuel, Southworth, Ben S., Warsa, James S., and Park, HyeongKae
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Mathematics - Numerical Analysis - Abstract
Second Moment Methods (SMMs) are developed that are consistent with the Discontinuous Galerkin (DG) spatial discretization of the discrete ordinates (or \Sn) transport equations. The low-order (LO) diffusion system of equations is discretized with fully consistent \Pone, Local Discontinuous Galerkin (LDG), and Interior Penalty (IP) methods. A discrete residual approach is used to derive SMM correction terms that make each of the LO systems consistent with the high-order (HO) discretization. We show that the consistent methods are more accurate and have better solution quality than independently discretized LO systems, that they preserve the diffusion limit, and that the LDG and IP consistent SMMs can be scalably solved in parallel on a challenging, multi-material benchmark problem.
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- 2024
10. On Properties of Adjoint Systems for Evolutionary PDEs
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Tran, Brian K., Southworth, Ben S., and Leok, Melvin
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Mathematics - Optimization and Control ,Mathematics - Numerical Analysis - Abstract
We investigate the geometric structure of adjoint systems associated with evolutionary partial differential equations at the fully continuous, semi-discrete, and fully discrete levels and the relations between these levels. We show that the adjoint system associated with an evolutionary partial differential equation has an infinite-dimensional Hamiltonian structure, which is useful for connecting the fully continuous, semi-discrete, and fully discrete levels. We subsequently address the question of discretize-then-optimize versus optimize-then-discrete for both semi-discretization and time integration, by characterizing the commutativity of discretize-then-optimize methods versus optimize-then-discretize methods uniquely in terms of an adjoint-variational quadratic conservation law. For Galerkin semi-discretizations and one-step time integration methods in particular, we explicitly construct these commuting methods by using structure-preserving discretization techniques., Comment: To appear: Journal of Nonlinear Science
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- 2024
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11. Duality based error control for the Signorini problem
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Ashby, Ben S. and Pryer, Tristan
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Mathematics - Numerical Analysis - Abstract
In this paper we study the a posteriori bounds for a conforming piecewise linear finite element approximation of the Signorini problem. We prove new rigorous a posteriori estimates of residual type in $L^{p}$, for $p \in (4,\infty)$ in two spatial dimensions. This new analysis treats the positive and negative parts of the discretisation error separately, requiring a novel sign- and bound-preserving interpolant, which is shown to have optimal approximation properties. The estimates rely on the sharp dual stability results on the problem in $W^{2,(4 - \varepsilon)/3}$ for any $\varepsilon \ll 1$. We summarise extensive numerical experiments aimed at testing the robustness of the estimator to validate the theory., Comment: 24 pages, 10 figures
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- 2024
12. Altered expression of vesicular trafficking machinery in prostate cancer affects lysosomal dynamics and provides insight into the underlying biology and disease progression
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Nturubika, Bukuru D., Guardia, Carlos M., Gershlick, David C., Logan, Jessica M., Martini, Carmela, Heatlie, Jessica K., Lazniewska, Joanna, Moore, Courtney, Lam, Giang T., Li, Ka L., Ung, Ben S-Y, Brooks, Robert D., Hickey, Shane M., Bert, Andrew G., Gregory, Philip A., Butler, Lisa M., O’Leary, John J., Brooks, Douglas A., and Johnson, Ian R. D.
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- 2024
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13. Order Conditions for Nonlinearly Partitioned Runge-Kutta Methods
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Tran, Brian K., Southworth, Ben S., and Buvoli, Tommaso
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Mathematics - Numerical Analysis - Abstract
Recently a new class of nonlinearly partitioned Runge-Kutta (NPRK) methods was proposed for nonlinearly partitioned systems of ordinary differential equations, $y' = F(y,y)$. The target class of problems are ones in which different scales, stiffnesses, or physics are coupled in a nonlinear way, wherein the desired partition cannot be written in a classical additive or component-wise fashion. Here we use rooted-tree analysis to derive full order conditions for NPRK$_M$ methods, where $M$ denotes the number of nonlinear partitions. Due to the nonlinear coupling and thereby mixed product differentials, it turns out the standard node-colored rooted-tree analysis used in analyzing ODE integrators does not naturally apply. Instead we develop a new edge-colored rooted-tree framework to address the nonlinear coupling. The resulting order conditions are enumerated, provided directly for up to 4th order with $M=2$ and 3rd-order with $M=3$, and related to existing order conditions of additive and partitioned RK methods.
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- 2024
14. Generalized Optimal AMG Convergence Theory for Nonsymmetric and Indefinite Problems
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Ali, Ahsan, Brannick, James, Kahl, Karsten, Krzysik, Oliver A., Schroder, Jacob B., and Southworth, Ben S.
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Mathematics - Numerical Analysis ,65N55, 65N22, 65F08, 65F10 - Abstract
Algebraic multigrid (AMG) is known to be an effective solver for many sparse symmetric positive definite (SPD) linear systems. For SPD systems, the convergence theory of AMG is well-understood in terms of the $A$-norm, but in a nonsymmetric setting, such an energy norm is non-existent. For this reason, convergence of AMG for nonsymmetric systems of equations remains an open area of research. A particular aspect missing from theory of nonsymmetric and indefinite AMG is the incorporation of general relaxation schemes. In the SPD setting, the classical form of optimal AMG interpolation provides a useful insight in determining the best possible two-grid convergence rate of a method based on an arbitrary symmetrized relaxation scheme. In this work, we discuss a generalization of the optimal AMG convergence theory targeting nonsymmetric problems, using a certain matrix-induced orthogonality of the left and right eigenvectors of a generalized eigenvalue problem relating the system matrix and relaxation operator. We show that using this generalization of the optimal convergence theory, one can obtain a measure of the spectral radius of the two grid error transfer operator that is mathematically equivalent to the derivation in the SPD setting for optimal interpolation, which instead uses norms. In addition, this generalization of the optimal AMG convergence theory can be further extended for symmetric indefinite problems, such as those arising from saddle point systems so that one can obtain a precise convergence rate of the resulting two-grid method based on optimal interpolation. We provide supporting numerical examples of the convergence theory for nonsymmetric advection-diffusion problems, two-dimensional Dirac equation motivated by $\gamma_5$-symmetry, and the mixed Darcy flow problem corresponding to a saddle point system., Comment: 20 pages, 5 figures, submitted for publication in the SIAM journal on scientific computing, copper mountain special section, iterative methods, 2024
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- 2024
15. A New Class of Runge-Kutta Methods for Nonlinearly Partitioned Systems
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Buvoli, Tommaso and Southworth, Ben S.
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Mathematics - Numerical Analysis - Abstract
This work introduces a new class of Runge-Kutta methods for solving nonlinearly partitioned initial value problems. These new methods, named nonlinearly partitioned Runge-Kutta (NPRK), generalize existing additive and component-partitioned Runge-Kutta methods, and allow one to distribute different types of implicitness within nonlinear terms. The paper introduces the NPRK framework and discusses order conditions, linear stability, and the derivation of implicit-explicit and implicit-implicit NPRK integrators. The paper concludes with numerical experiments that demonstrate the utility of NPRK methods for solving viscous Burger's and the gray thermal radiation transport equations.
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- 2024
16. One-sweep moment-based semi-implicit-explicit integration for gray thermal radiation transport
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Southworth, Ben S., Olivier, Samuel S., Park, HyeongKae, and Buvoli, Tommaso
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Mathematics - Numerical Analysis ,Mathematical Physics - Abstract
Thermal radiation transport (TRT) is a time dependent, high dimensional partial integro-differential equation. In practical applications such as inertial confinement fusion, TRT is coupled to other physics such as hydrodynamics, plasmas, etc., and the timescales one is interested in capturing are often much slower than the radiation timescale. As a result, TRT is treated implicitly, and due to its stiffness and high dimensionality, is often a dominant computational cost in multiphysics simulations. Here we develop a new approach for implicit-explicit (IMEX) integration of gray TRT in the deterministic S$_N$ setting, which requires only one sweep per stage, with the simplest first-order method requiring only one sweep per time step. The partitioning of equations is done via a moment-based high-order low-order formulation of TRT, where the streaming operator and first two moments are used to capture the asymptotic stiff regimes of the streaming limit and diffusion limit. Absorption-reemission is treated explicitly, and although stiff, is sufficiently damped by the implicit solve that we achieve stable accurate time integration without incorporating the coupling of the high order and low order equations implicitly. Due to nonlinear coupling of the high-order and low-order equations through temperature-dependent opacities, to facilitate IMEX partitioning and higher-order methods, we use a semi-implicit integration approach amenable to nonlinear partitions. Results are demonstrated on thick Marshak and crooked pipe benchmark problems, demonstrating orders of magnitude improvement in accuracy and wallclock compared with the standard first-order implicit integration typically used., Comment: To appears in JCP
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- 2024
17. Discretisation of an Oldroyd-B viscoelastic fluid flow using a Lie derivative formulation
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Ashby, Ben S. and Pryer, Tristan
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Mathematics - Numerical Analysis - Abstract
In this article we present a numerical method for the Stokes flow of an Oldroyd-B fluid. The viscoelastic stress evolves according to a constitutive law formulated in terms of the upper convected time derivative. A finite difference method is used to discretise along fluid trajectories to approximate the advection and deformation terms of the upper convected derivative in a simple, cheap and cohesive manner, as well as ensuring that the discrete conformation tensor is positive definite. A full implementation with coupling to the fluid flow is presented, along with detailed discussion of the issues that arise with such schemes. We demonstrate the performance of this method with detailed numerical experiments in a lid-driven cavity setup. Numerical results are benchmarked against published data, and the method is shown to perform well in this challenging case., Comment: 26 pages, 8 figures
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- 2024
18. Reinterpretation of prostate cancer pathology by Appl1, Sortilin and Syndecan-1 biomarkers
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Jessica M. Logan, Carmela Martini, Alexandra Sorvina, Ian R. D. Johnson, Robert D. Brooks, Maria C. Caruso, Chelsea Huzzell, Courtney R. Moore, Litsa Karageorgos, Lisa M. Butler, Prerna Tewari, Sarita Prabhakaran, Shane M. Hickey, Sonja Klebe, Hemamali Samaratunga, Brett Delahunt, Kim Moretti, John J. O’Leary, Douglas A. Brooks, and Ben S.-Y. Ung
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Science - Abstract
Abstract The diagnosis of prostate cancer using histopathology is reliant on the accurate interpretation of prostate tissue sections. Current standards rely on the assessment of Haematoxylin and Eosin (H&E) staining, which can be difficult to interpret and introduce inter-observer variability. Here, we present a digital pathology atlas and online resource of prostate cancer tissue micrographs for both H&E and the reinterpretation of samples using a novel set of three biomarkers as an interactive tool, where clinicians and scientists can explore high resolution histopathology from various case studies. The digital pathology prostate cancer atlas when used in conjunction with the biomarkers, will assist pathologists to accurately grade prostate cancer tissue samples.
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- 2024
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19. Carbapenemase-producing enterobacterales colonisation status does not lead to more frequent admissions: a linked patient study
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Michael J. Lydeamore, Tjibbe Donker, David Wu, Claire Gorrie, Annabelle Turner, Marion Easton, Daneeta Hennessy, Nicholas Geard, Benjamin P. Howden, Ben S. Cooper, Andrew Wilson, Anton Y. Peleg, and Andrew J. Stewardson
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Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Hospitals in any given region can be considered as part of a network, where facilities are connected to one another – and hospital pathogens potentially spread – through the movement of patients between them. We sought to describe the hospital admission patterns of patients known to be colonised with carbapenemase-producing Enterobacterales (CPE), and compare them with CPE-negative patient cohorts, matched on comorbidity information. Methods We performed a linkage study in Victoria, Australia, including datasets with notifiable diseases (CPE notifications) and hospital admissions (admission dates and diagnostic codes) for the period 2011 to 2020. Where the CPE notification date occurred during a hospital admission for the same patient, we identified this as the ‘index admission’. We determined the number of distinct health services each patient was admitted to, and time to first admission to a different health service. We compared CPE-positive patients with four cohorts of CPE-negative patients, sampled based on different matching criteria. Results Of 528 unique patients who had CPE detected during a hospital admission, 222 (42%) were subsequently admitted to a different health service during the study period. Among these patients, CPE diagnosis tended to occur during admission to a metropolitan public hospital (86%, 190/222), whereas there was a greater number of metropolitan private (23%, 52/222) and rural public (18%, 39/222) hospitals for the subsequent admission. Median time to next admission was 4 days (IQR, 0–75 days). Admission patterns for CPE-positive patients was similar to the cohort of CPE-negative patients matched on index admission, time period, and age-adjusted Charlson comorbidity index. Conclusions Movement of CPE-positive patients between health services is not a rare event. While the most common movement is from one public metropolitan health service to another, there is also a trend for movement from metropolitan public hospitals into private and rural hospitals. After accounting for clinical comorbidities, CPE colonisation status does not appear to impact on hospital admission frequency or timing. These findings support the potential utility of a centralised notification and outbreak management system for CPE positive patients.
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- 2024
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20. Health impact and cost-effectiveness of vaccination using potential next-generation influenza vaccines in Thailand: a modelling study
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Mark Jit, Yot Teerawattananon, Ben S Cooper, Rosalind M Eggo, Aronrag Meeyai, Simon R Procter, Naomi R Waterlow, Sreejith Radhakrishnan, Edwin van Leeuwen, and Sunate Chuenkitmongkol
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Medicine (General) ,R5-920 ,Infectious and parasitic diseases ,RC109-216 - Abstract
Introduction Thailand was one of the first low- and middle-income countries to publicly fund seasonal influenza vaccines, but the lack of predictability in the timing of epidemics and difficulty in predicting the dominant influenza subtypes present a challenge for existing vaccines. Next-generation influenza vaccines (NGIVs) are being developed with the dual aims of broadening the strain coverage and conferring longer-lasting immunity. However, there are no economic evaluations of NGIVs in Thailand.Methods We estimated the health impact and cost-effectiveness of NGIVs in Thailand between 2005 and 2009 using a combined epidemiological and economic model. We fitted the model to data on laboratory-confirmed influenza cases and then simulated the number of influenza infections, symptomatic cases, hospitalisations and deaths under different vaccination scenarios based on WHO-preferred product characteristics for NGIVs. We used previous estimates of costs and disability adjusted life years (DALYs) for influenza health outcomes to estimate incremental net monetary benefit, vaccine threshold prices and budget impact.Results With the current vaccine programme, there were an estimated 61 million influenza infections. Increasing coverage to 50% using improved vaccines reduced infections to between 23 and 57 million, and with universal vaccines to between 21 and 49 million, depending on the age groups targeted. Depending on the comparator, threshold prices for NGIVs ranged from US$2.80 to US$12.90 per dose for minimally improved vaccines and US$24.60 to US$69.90 for universal vaccines.Conclusion Influenza immunisation programmes using NGIVs are anticipated to provide considerable health benefits and be cost-effective in Thailand. However, although NGIVs might even be cost-saving in the long run, there could be significant budget implications for the Thai government even if the vaccines can be procured at a substantial discount to the maximum threshold price.
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- 2024
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21. Preventing diabetes: What overweight and obese adults with prediabetes in the United States report about their providers’ communication and attempted weight loss
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Emmanuella J. Demosthenes, Jason Freedman, Camila Hernandez, Lisa Shennette, Christine F. Frisard, Stephenie C. Lemon, Ben S. Gerber, and Daniel J. Amante
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Medicine - Abstract
Objective: To investigate what overweight or obese adults with prediabetes in the United States report being told by providers about 1) having prediabetes, 2) diabetes risk, and 3) losing weight and the associations of these communications with attempted weight loss. Methods: Data from 2015 to 2018 National Health and Nutrition Examination Surveys (NHANES) for adults with a body mass index in the overweight or obesity ranges and HbA1c in the prediabetes range were examined (n = 2085). Patient reported data on what providers told them about having prediabetes, being at risk for diabetes, and losing weight were compared with attempted weight loss. Results: Most participants (66.4%) reported never being told they had prediabetes nor being at risk for diabetes, 13.0% reported being told they had prediabetes, 10.6% at risk for diabetes, and 8.0% both messages. 18.3% of participants reported being told to lose weight. Participants who reported being told they had prediabetes and at increased diabetes risk were more likely to report attempted weight loss (adjusted odds ratio (AOR) 1.8, 95% confidence interval (CI) 1.1–3.2). Reporting that they were told to lose weight was not significantly associated with an increase in reported weight loss attempts. Conclusions: In this cohort of individuals with overweight/obesity and prediabetic HbA1c values, low rates communications with providers about prediabetes and diabetes risk were reported. When both were discussed, patients reported greater attempted weight loss. These findings draw attention to the potential impact that provider communications about prediabetes and diabetes risk may have on lifestyle behavior change.
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- 2024
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22. A Clinician and Electronic Health Record Wearable Device Intervention to Increase Physical Activity in Patients With Obesity: Formative Qualitative Study
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Varun Ayyaswami, Jeevarathna Subramanian, Jenna Nickerson, Stephen Erban, Nina Rosano, David D McManus, Ben S Gerber, and Jamie M Faro
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Medicine - Abstract
BackgroundThe number of individuals using digital health devices has grown in recent years. A higher rate of use in patients suggests that primary care providers (PCPs) may be able to leverage these tools to effectively guide and monitor physical activity (PA) for their patients. Despite evidence that remote patient monitoring (RPM) may enhance obesity interventions, few primary care practices have implemented programs that use commercial digital health tools to promote health or reduce complications of the disease. ObjectiveThis formative study aimed to assess the perceptions, needs, and challenges of implementation of an electronic health record (EHR)–integrated RPM program using wearable devices to promote patient PA at a large urban primary care practice to prepare for future intervention. MethodsOur team identified existing workflows to upload wearable data to the EHR (Epic Systems), which included direct Fitbit (Google) integration that allowed for patient PA data to be uploaded to the EHR. We identified pictorial job aids describing the clinical workflow to PCPs. We then performed semistructured interviews with PCPs (n=10) and patients with obesity (n=8) at a large urban primary care clinic regarding their preferences and barriers to the program. We presented previously developed pictorial aids with instructions for (1) providers to complete an order set, set step-count goals, and receive feedback and (2) patients to set up their wearable devices and connect them to their patient portal account. We used rapid qualitative analysis during and after the interviews to code and develop key themes for both patients and providers that addressed our research objective. ResultsIn total, 3 themes were identified from provider interviews: (1) providers’ knowledge of PA prescription is focused on general guidelines with limited knowledge on how to tailor guidance to patients, (2) providers were open to receiving PA data but were worried about being overburdened by additional patient data, and (3) providers were concerned about patients being able to equitably access and participate in digital health interventions. In addition, 3 themes were also identified from patient interviews: (1) patients received limited or nonspecific guidance regarding PA from providers and other resources, (2) patients want to share exercise metrics with the health care team and receive tailored PA guidance at regular intervals, and (3) patients need written resources to support setting up an RPM program with access to live assistance on an as-needed basis. ConclusionsImplementation of an EHR-based RPM program and associated workflow is acceptable to PCPs and patients but will require attention to provider concerns of added burdensome patient data and patient concerns of receiving tailored PA guidance. Our ongoing work will pilot the RPM program and evaluate feasibility and acceptability within a primary care setting.
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- 2024
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23. Individualised, short-course antibiotic treatment versus usual long-course treatment for ventilator-associated pneumonia (REGARD-VAP): a multicentre, individually randomised, open-label, non-inferiority trial
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Mo, Yin, Booraphun, Suchart, Li, Andrew Yunkai, Domthong, Pornanan, Kayastha, Gyan, Lau, Yie Hui, Chetchotisakd, Ploenchan, Limmathurotsakul, Direk, Tambyah, Paul Anantharajah, Cooper, Ben S., Chaisurote, Jirachaya, Poomthong, Pulyamon, Kawiwangsanon, Angkhana, Semram, Khanungnit, Kitsaran, Suwatthiya, Kittivaravad, Chamlong, Wongsrikaew, Pawatwong, Wetchagama, Narongdet, Patamatham, Sadudee, Rujisirasankul, Asawin, Narmwong, Arthitpong, Sodapak, Chaianan, Nuntalohit, Somboon, Boonsong, Somsamai, Nilsakul, Jiraphorn, Moolasart, Jirawat, Phunmanee, Anakapong, Panitchote, Anupol, Duangthongphon, Pichayen, Pisuttimarn, Pornrith, Srisurat, Nuttiya, Yip, Hwee Seng, Maclaren, Graeme, Toon, Wei Lim, Chew, Ka Lip, Lim, Shir Lynn, Teo, Boon Wee, Lim, Tian Jin, Sun, Louisa Jin, Peng, Siyu, Graves, Nicholas, Chew, Yin Tze, Ling, Li Min, Chia, Po Ying, Chia, Yew Woon, Huang, Wenjie, Chan, Yu Kit, Piya, Roshan, Shrestha, Anil, Karkey, Abhilasha, Dongol, Sabina, Tuon, Felipe Francisco, and Cooper, Ben S
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- 2024
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24. Making Visible Ordinary Groupness
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Bradley, Ben S., primary, Selby, Jane, additional, and Stapleton, Matthew, additional
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- 2024
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25. Association between obesity and statin use on mortality and hospital encounters in atrial fibrillation
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Michael C. Hill, Noah Kim, William Galanter, Ben S. Gerber, Colin C. Hubbard, Dawood Darbar, and Mark D. McCauley
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Atrial fibrillation ,Obesity ,Mortality ,Hospitalization ,Statins ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Obesity increases risk of atrial fibrillation (AF) at least in part due to pro-inflammatory effects, but has been paradoxically associated with improved mortality. Although statins have pleiotropic anti-inflammatory properties, their interaction with obesity and clinical outcomes in AF is unknown. We explored the relationship between BMI, statin use, and all-cause mortality and AF/congestive heart failure (CHF)-related encounters, hypothesizing that statin exposure may be differentially associated with improved outcomes in overweight/obesity. Methods: This was a single center retrospective cohort study of adults with AF diagnosed between 2011–2018. Patients were grouped by body mass index (BMI) and statin use at time of AF diagnosis. Outcomes included all-cause mortality and ED or inpatient encounters for AF or CHF. Results and Conclusions: A total of 2503 subjects were included (median age 66 years, 43.4 % female, median BMI 29.8 kg/m2, 54.6 % on baseline statin therapy). Increasing BMI was associated with decreased mortality hazard but not associated with AF/CHF encounter risk. Adjusting for statin-BMI interaction, demographics, and cardiovascular comorbidities, overweight non-statin users experienced improved mortality (adjusted hazard ratio [aHR] 0.55, 95 % CI 0.35–0.84) compared to statin users (aHR 0.98, 95 % CI 0.69–1.40; interaction P-value = 0.013). Mortality hazard was consistently lower in obese non-statin users than in statin users, however interaction was insignificant. No significant BMI-statin interactions were observed in AF/CHF encounter risk. In summary, statin use was not differentially associated with improved mortality or hospitalization risk in overweight/obese groups. These findings do not support statins for secondary prevention of adverse outcomes based on overweight/obesity status alone.
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- 2024
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26. Using Microeconomic Spending Traits to Inform Trends in Utilization of Cosmetic Procedures by Race and Ethnicity
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Ben S. Rhee, BA, John Pham, BS, Joshua R. Tanzer, PhD, MS, Jodi S. Charvis, MS, and Lauren O. Roussel, MD
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Surgery ,RD1-811 - Abstract
Background:. Cosmetic plastic surgery in the United States is underutilized by African American and Hispanic populations compared with their White and Asian counterparts. This study evaluated whether microeconomic spending traits as a representation of financial stability can inform trends in cosmetic procedure volumes by racial group. Methods:. Annual volumes for the top five cosmetic surgical and cosmetic minimally invasive procedures by racial/ethnic group from 2012 to 2020 were collected from the American Society of Plastic Surgeons’ annual reports. Factor analysis was used to calculate inflexible and flexible consumer spending by racial/ethnic groupings from the US Bureau of Labor Statistics’ consumer expenditure data. All four factors were calculated across US Bureau of Labor Statistics–defined racial/ethnic groupings and standardized so they could be interpreted relative to each other. Results:. Compared with the other groupings, the White/Asian/other grouping spent significantly more on average for inflexible consumer spending (P = 0.0097), flexible consumer spending (P < 0.0001), cosmetic surgical procedures (P < 0.0001), and cosmetic minimally invasive procedures (P = 0.0006). In contrast, African American people spent significantly less on average for all four factors (all P < 0.01). For Hispanic people, values were significantly less on average for flexible consumer spending (P = 0.0023), cosmetic surgical procedures (P < 0.0001), and cosmetic minimally invasive procedures (P = 0.0002). Conclusions:. This study demonstrates that inflexible and flexible consumer spending follow trends in utilization of cosmetic surgical and minimally invasive procedures by racial/ethnic groups. These microeconomic spending inequities may help further contextualize the racial/ethnic variation in access to cosmetic surgery.
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- 2024
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27. Global burden of bacterial antimicrobial resistance 1990–2021: a systematic analysis with forecasts to 2050
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Naghavi, Mohsen, Vollset, Stein Emil, Ikuta, Kevin S, Swetschinski, Lucien R, Gray, Authia P, Wool, Eve E, Robles Aguilar, Gisela, Mestrovic, Tomislav, Smith, Georgia, Han, Chieh, Hsu, Rebecca L, Chalek, Julian, Araki, Daniel T, Chung, Erin, Raggi, Catalina, Gershberg Hayoon, Anna, Davis Weaver, Nicole, Lindstedt, Paulina A, Smith, Amanda E, Altay, Umut, Bhattacharjee, Natalia V, Giannakis, Konstantinos, Fell, Frederick, McManigal, Barney, Ekapirat, Nattwut, Mendes, Jessica Andretta, Runghien, Tilleye, Srimokla, Oraya, Abdelkader, Atef, Abd-Elsalam, Sherief, Aboagye, Richard Gyan, Abolhassani, Hassan, Abualruz, Hasan, Abubakar, Usman, Abukhadijah, Hana J, Aburuz, Salahdein, Abu-Zaid, Ahmed, Achalapong, Sureerak, Addo, Isaac Yeboah, Adekanmbi, Victor, Adeyeoluwa, Temitayo Esther, Adnani, Qorinah Estiningtyas Sakilah, Adzigbli, Leticia Akua, Afzal, Muhammad Sohail, Afzal, Saira, Agodi, Antonella, Ahlstrom, Austin J, Ahmad, Aqeel, Ahmad, Sajjad, Ahmad, Tauseef, Ahmadi, Ali, Ahmed, Ayman, Ahmed, Haroon, Ahmed, Ibrar, Ahmed, Mohammed, Ahmed, Saeed, Ahmed, Syed Anees, Akkaif, Mohammed Ahmed, Al Awaidy, Salah, Al Thaher, Yazan, Alalalmeh, Samer O, AlBataineh, Mohammad T, Aldhaleei, Wafa A, Al-Gheethi, Adel Ali Saeed, Alhaji, Nma Bida, Ali, Abid, Ali, Liaqat, Ali, Syed Shujait, Ali, Waad, Allel, Kasim, Al-Marwani, Sabah, Alrawashdeh, Ahmad, Altaf, Awais, Al-Tammemi, Alaa B., Al-Tawfiq, Jaffar A, Alzoubi, Karem H, Al-Zyoud, Walid Adnan, Amos, Ben, Amuasi, John H, Ancuceanu, Robert, Andrews, Jason R, Anil, Abhishek, Anuoluwa, Iyadunni Adesola, Anvari, Saeid, Anyasodor, Anayochukwu Edward, Apostol, Geminn Louis Carace, Arabloo, Jalal, Arafat, Mosab, Aravkin, Aleksandr Y, Areda, Demelash, Aremu, Abdulfatai, Artamonov, Anton A, Ashley, Elizabeth A, Asika, Marvellous O, Athari, Seyyed Shamsadin, Atout, Maha Moh'd Wahbi, Awoke, Tewachew, Azadnajafabad, Sina, Azam, James Mba, Aziz, Shahkaar, Azzam, Ahmed Y., Babaei, Mahsa, Babin, Francois-Xavier, Badar, Muhammad, Baig, Atif Amin, Bajcetic, Milica, Baker, Stephen, Bardhan, Mainak, Barqawi, Hiba Jawdat, Basharat, Zarrin, Basiru, Afisu, Bastard, Mathieu, Basu, Saurav, Bayleyegn, Nebiyou Simegnew, Belete, Melaku Ashagrie, Bello, Olorunjuwon Omolaja, Beloukas, Apostolos, Berkley, James A, Bhagavathula, Akshaya Srikanth, Bhaskar, Sonu, Bhuyan, Soumitra S, Bielicki, Julia A, Briko, Nikolay Ivanovich, Brown, Colin Stewart, Browne, Annie J, Buonsenso, Danilo, Bustanji, Yasser, Carvalheiro, Cristina G, Castañeda-Orjuela, Carlos A, Cenderadewi, Muthia, Chadwick, Joshua, Chakraborty, Sandip, Chandika, Rama Mohan, Chandy, Sara, Chansamouth, Vilada, Chattu, Vijay Kumar, Chaudhary, Anis Ahmad, Ching, Patrick R, Chopra, Hitesh, Chowdhury, Fazle Rabbi, Chu, Dinh-Toi, Chutiyami, Muhammad, Cruz-Martins, Natalia, da Silva, Alanna Gomes, Dadras, Omid, Dai, Xiaochen, Darcho, Samuel D, Das, Saswati, De la Hoz, Fernando Pio, Dekker, Denise Myriam, Dhama, Kuldeep, Diaz, Daniel, Dickson, Benjamin Felix Rothschild, Djorie, Serge Ghislain, Dodangeh, Milad, Dohare, Sushil, Dokova, Klara Georgieva, Doshi, Ojas Prakashbhai, Dowou, Robert Kokou, Dsouza, Haneil Larson, Dunachie, Susanna J, Dziedzic, Arkadiusz Marian, Eckmanns, Tim, Ed-Dra, Abdelaziz, Eftekharimehrabad, Aziz, Ekundayo, Temitope Cyrus, El Sayed, Iman, Elhadi, Muhammed, El-Huneidi, Waseem, Elias, Christelle, Ellis, Sally J, Elsheikh, Randa, Elsohaby, Ibrahim, Eltaha, Chadi, Eshrati, Babak, Eslami, Majid, Eyre, David William, Fadaka, Adewale Oluwaseun, Fagbamigbe, Adeniyi Francis, Fahim, Ayesha, Fakhri-Demeshghieh, Aliasghar, Fasina, Folorunso Oludayo, Fasina, Modupe Margaret, Fatehizadeh, Ali, Feasey, Nicholas A, Feizkhah, Alireza, Fekadu, Ginenus, Fischer, Florian, Fitriana, Ida, Forrest, Karen M, Fortuna Rodrigues, Celia, Fuller, John E, Gadanya, Muktar A, Gajdács, Márió, Gandhi, Aravind P, Garcia-Gallo, Esteban E, Garrett, Denise O, Gautam, Rupesh K, Gebregergis, Miglas Welay, Gebrehiwot, Mesfin, Gebremeskel, Teferi Gebru, Geffers, Christine, Georgalis, Leonidas, Ghazy, Ramy Mohamed, Golechha, Mahaveer, Golinelli, Davide, Gordon, Melita, Gulati, Snigdha, Gupta, Rajat Das, Gupta, Sapna, Gupta, Vijai Kumar, Habteyohannes, Awoke Derbie, Haller, Sebastian, Harapan, Harapan, Harrison, Michelle L, Hasaballah, Ahmed I, Hasan, Ikramul, Hasan, Rumina Syeda, Hasani, Hamidreza, Haselbeck, Andrea Haekyung, Hasnain, Md Saquib, Hassan, Ikrama Ibrahim, Hassan, Shoaib, Hassan Zadeh Tabatabaei, Mahgol Sadat, Hayat, Khezar, He, Jiawei, Hegazi, Omar E, Heidari, Mohammad, Hezam, Kamal, Holla, Ramesh, Holm, Marianne, Hopkins, Heidi, Hossain, Md Mahbub, Hosseinzadeh, Mehdi, Hostiuc, Sorin, Hussein, Nawfal R, Huy, Le Duc, Ibáñez-Prada, Elsa D, Ikiroma, Adalia, Ilic, Irena M, Islam, Sheikh Mohammed Shariful, Ismail, Faisal, Ismail, Nahlah Elkudssiah, Iwu, Chidozie Declan, Iwu-Jaja, Chinwe Juliana, Jafarzadeh, Abdollah, Jaiteh, Fatoumatta, Jalilzadeh Yengejeh, Reza, Jamora, Roland Dominic G, Javidnia, Javad, Jawaid, Talha, Jenney, Adam W J, Jeon, Hyon Jin, Jokar, Mohammad, Jomehzadeh, Nabi, Joo, Tamas, Joseph, Nitin, Kamal, Zul, Kanmodi, Kehinde Kazeem, Kantar, Rami S, Kapisi, James Apollo, Karaye, Ibraheem M, Khader, Yousef Saleh, Khajuria, Himanshu, Khalid, Nauman, Khamesipour, Faham, Khan, Ajmal, Khan, Mohammad Jobair, Khan, Muhammad Tariq, Khanal, Vishnu, Khidri, Feriha Fatima, Khubchandani, Jagdish, Khusuwan, Suwimon, Kim, Min Seo, Kisa, Adnan, Korshunov, Vladimir Andreevich, Krapp, Fiorella, Krumkamp, Ralf, Kuddus, Mohammed, Kulimbet, Mukhtar, Kumar, Dewesh, Kumaran, Emmanuelle A P, Kuttikkattu, Ambily, Kyu, Hmwe Hmwe, Landires, Iván, Lawal, Basira Kankia, Le, Thao Thi Thu, Lederer, Ingeborg Maria, Lee, Munjae, Lee, Seung Won, Lepape, Alain, Lerango, Temesgen Leka, Ligade, Virendra S, Lim, Cherry, Lim, Stephen S, Limenh, Liknaw Workie, Liu, Chaojie, Liu, Xiaofeng, Liu, Xuefeng, Loftus, Michael J, M Amin, Hawraz Ibrahim, Maass, Kelsey Lynn, Maharaj, Sandeep B, Mahmoud, Mansour Adam, Maikanti-Charalampous, Panagiota, Makram, Omar M, Malhotra, Kashish, Malik, Ahmad Azam, Mandilara, Georgia D, Marks, Florian, Martinez-Guerra, Bernardo Alfonso, Martorell, Miquel, Masoumi-Asl, Hossein, Mathioudakis, Alexander G, May, Juergen, McHugh, Theresa A, Meiring, James, Meles, Hadush Negash, Melese, Addisu, Melese, Endalkachew Belayneh, Minervini, Giuseppe, Mohamed, Nouh Saad, Mohammed, Shafiu, Mohan, Syam, Mokdad, Ali H, Monasta, Lorenzo, Moodi Ghalibaf, AmirAli, Moore, Catrin E, Moradi, Yousef, Mossialos, Elias, Mougin, Vincent, Mukoro, George Duke, Mulita, Francesk, Muller-Pebody, Berit, Murillo-Zamora, Efren, Musa, Sani, Musicha, Patrick, Musila, Lillian A, Muthupandian, Saravanan, Nagarajan, Ahamarshan Jayaraman, Naghavi, Pirouz, Nainu, Firzan, Nair, Tapas Sadasivan, Najmuldeen, Hastyar Hama Rashid, Natto, Zuhair S, Nauman, Javaid, Nayak, Biswa Prakash, Nchanji, G Takop, Ndishimye, Pacifique, Negoi, Ionut, Negoi, Ruxandra Irina, Nejadghaderi, Seyed Aria, Nguyen, QuynhAnh P, Noman, Efaq Ali, Nwakanma, Davis C, O'Brien, Seamus, Ochoa, Theresa J, Odetokun, Ismail A, Ogundijo, Oluwaseun Adeolu, Ojo-Akosile, Tolulope R, Okeke, Sylvester Reuben, Okonji, Osaretin Christabel, Olagunju, Andrew T, Olivas-Martinez, Antonio, Olorukooba, Abdulhakeem Abayomi, Olwoch, Peter, Onyedibe, Kenneth Ikenna, Ortiz-Brizuela, Edgar, Osuolale, Olayinka, Ounchanum, Pradthana, Oyeyemi, Oyetunde T, P A, Mahesh Padukudru, Paredes, Jose L, Parikh, Romil R, Patel, Jay, Patil, Shankargouda, Pawar, Shrikant, Peleg, Anton Y, Peprah, Prince, Perdigão, João, Perrone, Carlo, Petcu, Ionela-Roxana, Phommasone, Koukeo, Piracha, Zahra Zahid, Poddighe, Dimitri, Pollard, Andrew J, Poluru, Ramesh, Ponce-De-Leon, Alfredo, Puvvula, Jagadeesh, Qamar, Farah Naz, Qasim, Nameer Hashim, Rafai, Clotaire Donatien, Raghav, Pankaja, Rahbarnia, Leila, Rahim, Fakher, Rahimi-Movaghar, Vafa, Rahman, Mosiur, Rahman, Muhammad Aziz, Ramadan, Hazem, Ramasamy, Shakthi Kumaran, Ramesh, Pushkal Sinduvadi, Ramteke, Pramod W, Rana, Rishabh Kumar, Rani, Usha, Rashidi, Mohammad-Mahdi, Rathish, Devarajan, Rattanavong, Sayaphet, Rawaf, Salman, Redwan, Elrashdy Moustafa Mohamed, Reyes, Luis Felipe, Roberts, Tamalee, Robotham, Julie V, Rosenthal, Victor Daniel, Ross, Allen Guy, Roy, Nitai, Rudd, Kristina E, Sabet, Cameron John, Saddik, Basema Ahmad, Saeb, Mohammad Reza, Saeed, Umar, Saeedi Moghaddam, Sahar, Saengchan, Weeravoot, Safaei, Mohsen, Saghazadeh, Amene, Saheb Sharif-Askari, Narjes, Sahebkar, Amirhossein, Sahoo, Soumya Swaroop, Sahu, Maitreyi, Saki, Morteza, Salam, Nasir, Saleem, Zikria, Saleh, Mohamed A, Samodra, Yoseph Leonardo, Samy, Abdallah M, Saravanan, Aswini, Satpathy, Maheswar, Schumacher, Austin E, Sedighi, Mansour, Seekaew, Samroeng, Shafie, Mahan, Shah, Pritik A, Shahid, Samiah, Shahwan, Moyad Jamal, Shakoor, Sadia, Shalev, Noga, Shamim, Muhammad Aaqib, Shamshirgaran, Mohammad Ali, Shamsi, Anas, Sharifan, Amin, Shastry, Rajesh P, Shetty, Mahabalesh, Shittu, Aminu, Shrestha, Sunil, Siddig, Emmanuel Edwar, Sideroglou, Theologia, Sifuentes-Osornio, Jose, Silva, Luís Manuel Lopes Rodrigues, Simões, Eric A F, Simpson, Andrew J H, Singh, Amit, Singh, Surjit, Sinto, Robert, Soliman, Sameh S M, Soraneh, Soroush, Stoesser, Nicole, Stoeva, Temenuga Zhekova, Swain, Chandan Kumar, Szarpak, Lukasz, T Y, Sree Sudha, Tabatabai, Shima, Tabche, Celine, Taha, Zanan Mohammed-Ameen, Tan, Ker-Kan, Tasak, Nidanuch, Tat, Nathan Y, Thaiprakong, Areerat, Thangaraju, Pugazhenthan, Tigoi, Caroline Chepngeno, Tiwari, Krishna, Tovani-Palone, Marcos Roberto, Tran, Thang Huu, Tumurkhuu, Munkhtuya, Turner, Paul, Udoakang, Aniefiok John, Udoh, Arit, Ullah, Noor, Ullah, Saeed, Vaithinathan, Asokan Govindaraj, Valenti, Mario, Vos, Theo, Vu, Huong T L, Waheed, Yasir, Walker, Ann Sarah, Walson, Judd L, Wangrangsimakul, Tri, Weerakoon, Kosala Gayan, Wertheim, Heiman F L, Williams, Phoebe C M, Wolde, Asrat Arja, Wozniak, Teresa M, Wu, Felicia, Wu, Zenghong, Yadav, Mukesh Kumar Kumar, Yaghoubi, Sajad, Yahaya, Zwanden Sule, Yarahmadi, Amir, Yezli, Saber, Yismaw, Yazachew Engida, Yon, Dong Keon, Yuan, Chun-Wei, Yusuf, Hadiza, Zakham, Fathiah, Zamagni, Giulia, Zhang, Haijun, Zhang, Zhi-Jiang, Zielińska, Magdalena, Zumla, Alimuddin, Zyoud, Sa'ed H. H, Zyoud, Samer H, Hay, Simon I, Stergachis, Andy, Sartorius, Benn, Cooper, Ben S, Dolecek, Christiane, and Murray, Christopher J L
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- 2024
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28. Global burden associated with 85 pathogens in 2019: a systematic analysis for the Global Burden of Disease Study 2019
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Naghavi, Mohsen, Mestrovic, Tomislav, Gray, Authia, Gershberg Hayoon, Anna, Swetschinski, Lucien R, Robles Aguilar, Gisela, Davis Weaver, Nicole, Ikuta, Kevin S, Chung, Erin, Wool, Eve E, Han, Chieh, Araki, Daniel T, Albertson, Samuel B, Bender, Rose, Bertolacci, Greg, Browne, Annie J, Cooper, Ben S, Cunningham, Matthew W, Dolecek, Christiane, Doxey, Matthew, Dunachie, Susanna J, Ghoba, Sama, Haines-Woodhouse, Georgina, Hay, Simon I, Hsu, Rebecca L, Iregbu, Kenneth C, Kyu, Hmwe H, Ledesma, Jorge R, Ma, Jianing, Moore, Catrin E, Mosser, Jonathan F, Mougin, Vincent, Naghavi, Pirouz, Novotney, Amanda, Rosenthal, Victor Daniel, Sartorius, Benn, Stergachis, Andy, Troeger, Christopher, Vongpradith, Avina, Walters, Magdalene K, Wunrow, Han Yong, and Murray, Christopher JL
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- 2024
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29. Association between obesity and statin use on mortality and hospital encounters in atrial fibrillation
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Hill, Michael C., Kim, Noah, Galanter, William, Gerber, Ben S., Hubbard, Colin C., Darbar, Dawood, and McCauley, Mark D.
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- 2024
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30. The modern face of esophageal candidiasis in an oncology center: Correlating clinical manifestations, endoscopic grade, and pathological data in 323 contemporary cancer patients
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Matsuo, Takahiro, Singh, Ben S., Wurster, Sebastian, Jiang, Ying, Bhutani, Manoop S., Chatterjee, Deyali, and Kontoyiannis, Dimitrios P.
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- 2024
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31. Antimicrobial resistance prevalence in bloodstream infection in 29 European countries by age and sex: An observational study
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Waterlow, Naomi R., Cooper, Ben S., Robotham, Julie V., and Knight, Gwenan Mary
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Bacteria -- Analysis -- Health aspects -- Usage ,Drug resistance in microorganisms -- Usage -- Analysis -- Health aspects ,Prevalence studies (Epidemiology) -- Analysis -- Health aspects -- Usage ,Infection -- Usage -- Health aspects -- Analysis ,Methicillin -- Usage ,Epidemiology -- Usage -- Analysis -- Health aspects ,Biological sciences ,World Health Organization - Abstract
Background Antibiotic usage, contact with high transmission healthcare settings as well as changes in immune system function all vary by a patient's age and sex. Yet, most analyses of antimicrobial resistance (AMR) ignore demographic indicators and provide only country-level resistance prevalence values. This study aimed to address this knowledge gap by quantifying how resistance prevalence and incidence of bloodstream infection (BSI) varied by age and sex across bacteria and antibiotics in Europe. Methods and findings We used patient-level data collected as part of routine surveillance between 2015 and 2019 on BSIs in 29 European countries from the European Antimicrobial Resistance Surveillance Network (EARS-Net). A total of 6,862,577 susceptibility results from isolates with age, sex, and spatial information from 944,520 individuals were used to characterise resistance prevalence patterns for 38 different bacterial species and antibiotic combinations, and 47% of these susceptibility results were from females, with a similar age distribution in both sexes (mean of 66 years old). A total of 349,448 isolates from 2019 with age and sex metadata were used to calculate incidence. We fit Bayesian multilevel regression models by country, laboratory code, sex, age, and year of sample to quantify resistant prevalence and provide estimates of country-, bacteria-, and drug-family effect variation. We explore our results in greater depths for 2 of the most clinically important bacteria-antibiotic combinations (aminopenicillin resistance in Escherichia coli and methicillin resistance in Staphylococcus aureus) and present a simplifying indicative index of the difference in predicted resistance between old (aged 100) and young (aged 1). At the European level, we find distinct patterns in resistance prevalence by age. Trends often vary more within an antibiotic family, such as fluroquinolones, than within a bacterial species, such as Pseudomonas aeruginosa. Clear resistance increases by age for methicillin-resistant Staphylococcus aureus (MRSA) contrast with a peak in resistance to several antibiotics at approximately 30 years of age for P. aeruginosa. For most bacterial species, there was a u-shaped pattern of infection incidence with age, which was higher in males. An important exception was E. coli, for which there was an elevated incidence in females between the ages of 15 and 40. At the country-level, subnational differences account for a large amount of resistance variation (approximately 38%), and there are a range of functional forms for the associations between age and resistance prevalence. For MRSA, age trends were mostly positive, with 72% (n = 21) of countries seeing an increased resistance between males aged 1 and 100 years and a greater change in resistance in males. This compares to age trends for aminopenicillin resistance in E. coli which were mostly negative (males: 93% (n = 27) of countries see decreased resistance between those aged 1 and 100 years) with a smaller change in resistance in females. A change in resistance prevalence between those aged 1 and 100 years ranged up to 0.51 (median, 95% quantile of model simulated prevalence using posterior parameter ranges 0.48, 0.55 in males) for MRSA in one country but varied between 0.16 (95% quantile 0.12, 0.21 in females) to -0.27 (95% quantile -0.4, -0.15 in males) across individual countries for aminopenicillin resistance in E. coli. Limitations include potential bias due to the nature of routine surveillance and dependency of results on model structure. Conclusions In this study, we found that the prevalence of resistance in BSIs in Europe varies substantially by bacteria and antibiotic over the age and sex of the patient shedding new light on gaps in our understanding of AMR epidemiology. Future work is needed to determine the drivers of these associations in order to more effectively target transmission and antibiotic stewardship interventions., Author(s): Naomi R. Waterlow 1, Ben S. Cooper 2, Julie V. Robotham 3, Gwenan Mary Knight 1,4,* Introduction Antimicrobial resistance (AMR) is a global public health priority [1]. Understanding how [...]
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- 2024
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32. Exploring the role of sporadic BRAF and KRAS mutations during colorectal cancer pathogenesis: A spotlight on the contribution of the endosome-lysosome system
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Tang, Jingying, Lam, Giang T., Brooks, Robert D., Miles, Mark, Useckaite, Zivile, Johnson, Ian RD., Ung, Ben S.-Y., Martini, Carmela, Karageorgos, Litsa, Hickey, Shane M., Selemidis, Stavros, Hopkins, Ashley M., Rowland, Andrew, Vather, Ryash, O'Leary, John J., Brooks, Douglas A., Caruso, Maria C., and Logan, Jessica M.
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- 2024
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33. SP42. Plastic Surgeons’ Geographic And Practice Characteristics Influence Merit-based Incentive Payment System (MIPS) Reimbursement Payment Adjustments - A Look At Performance Years 2020-2021
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Kasthuri, Viknesh S., Rhee, Ben S., and Roussel, Lauren O.
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- 2024
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34. SP01. An Analysis Of Public Perceptions On Cosmetic Tourism And Motivational Factors For Geographic Choice Of Cosmetic Procedures
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Rhee, Ben S., Kasthuri, Viknesh S., and Roussel, Lauren O.
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- 2024
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35. Global scientific trends in healthy aging in the early 21st century: A data-driven scientometric and visualized analysis
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Zhang, Ye, Gu, Zhengmin, Xu, Yingxin, He, Miao, Gerber, Ben S., Wang, Zhongqing, Liu, Feifan, and Peng, Cheng
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- 2024
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36. SP42. Plastic Surgeons’ Geographic And Practice Characteristics Influence Merit-based Incentive Payment System (MIPS) Reimbursement Payment Adjustments - A Look At Performance Years 2020-2021
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Viknesh S. Kasthuri, AB, Ben S. Rhee, BA, and Lauren O. Roussel, MD
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Surgery ,RD1-811 - Published
- 2024
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37. The Impact of a Centralized Plastic Surgery Research Infrastructure on Scholarly Productivity and Output
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Nikhil Sobti, MD, Ben S. Rhee, BA, Luke Soliman, BA, Vinay Rao, MD, MPH, Daniel Kwan, MD, Albert S. Woo, MD, Reena Bhatt, MD, Loree Kalliainen, MD, MA, Karl Breuing, MD, and Paul Liu, MD
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Surgery ,RD1-811 - Abstract
Summary:. Although research and innovation is a key within the field of plastic and reconstructive surgery, the impact of team structure, interpersonal dynamics, and/or standardized infrastructure on scholarly output has been infrequently studied. In this work, we present the formation and implementation of a novel plastic surgery research program that aims to unite previously disparate clinical and translational research efforts at our institution to facilitate critical inquiry. From July 2022 to June 2023, our department launched a pilot research program based on three pillars: (1) formalization of a research curriculum (monthly research meetings for agenda setting and discussion for project honing, formal research leadership for meeting facilitation and workflow regulation), (2) development of a centralized database to compile ongoing research (Google Drive repository to house all ongoing research documents, facilitate real-time editing, and provide resources/templates for assisting in the research process), and (3) bolstering of a core research identity built on mentorship and collaboration (more frequent interactions to shift previously siloed faculty-student mentorship into a robust milieu of intercollaboration). During the first year, we saw an increased number of publications and presentations, as well as robust participation and contribution from faculty, residents, and medical students. Future directions will focus on addressing resource limitation, such as project idea availability and funding, to sustain the success and growth of this novel research infrastructure.
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- 2024
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38. The Influence of Future Changes in Tidal Range, Storm Surge, and Mean Sea Level on the Emergence of Chronic Flooding
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Ben S. Hague and Stefan. A. Talke
- Subjects
chronic flooding ,tides ,storm surge ,sea‐level rise ,non‐stationarity ,projections ,Environmental sciences ,GE1-350 ,Ecology ,QH540-549.5 - Abstract
Abstract Sea‐level rise is leading to increasingly frequent coastal floods globally. Recent research shows that changes in tidal properties and storm surge magnitudes can further exacerbate sea‐level rise‐related increases in flood frequencies. However, such non‐stationarity in tide and storm surge statistics are largely neglected in existing coastal flood projection methodologies. Here we develop a framework to explore the effect that different realizations of various sources of uncertainty have on projections of coastal flood frequencies, including changes in tidal range and storminess. Our projection methodology captures how observed flood rates depend on how storm surges coincide with tidal extremes. We show that higher flood rates and earlier emergence of chronic flooding are associated with larger sea‐level rise rates, lower flood thresholds, and increases in tidal range and skew surge magnitudes. Smaller sea‐level rise rates, higher flood thresholds and decreases in sea level variability lead to commensurately lower flood rates. Percentagewise, changes in tidal amplitudes generally have a much larger impact on flood frequencies than equivalent percentagewise changes in storm surge magnitudes. We explore several implications of these findings. Firstly, understanding future local changes in storm surges and tides is required to fully quantify future flood hazards. Secondly, existing hazard assessments may underestimate future flood rates as changes in tides are not considered. Finally, identifying the flood frequencies and severities relevant to local coastal managers is imperative to develop useable and policy‐relevant projections for decisionmakers.
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- 2024
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39. Eastern Australian estuaries will transition to tidal flood regimes in coming decades
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Ben S. Hague, Mandi C. Thran, Doerte Jakob, and David A. Jones
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climate change ,coastal flooding ,estuaries ,sea-level rise ,tidal range ,Harbors and coast protective works. Coastal engineering. Lighthouses ,TC203-380 ,Oceanography ,GC1-1581 - Abstract
Tidal flooding occurs when coastal water levels exceed impact-based flood thresholds due to tides alone, under average weather conditions. Transitions to tidal flood regimes are already underway for nuisance flood severities in harbours and bays and expected for higher severities in coming decades. In the first such regional assessment, we show that the same transition to tidally forced floods can also be expected to occur in Australian estuaries with less than 0.1 m further sea-level rise. Flood thresholds that historically used to only be exceeded under the combined effects of riverine (freshwater) and coastal (salt water) influences will then occur due to high tides alone. Once this tidal flooding emerges, it is projected to become chronic within two decades. Locations most at-risk of the emergence of tidal flooding and subsequent establishment of chronic flood regimes are those just inside estuary entrances. These locations are exemplified by low freeboard, the vertical distance between a flood threshold and a typical high tide level. We use a freeboard-based analysis to estimate the sea-level rise required for impacts associated with official flood thresholds to occur due to tides alone. The resultant tide-only flood frequency estimates provide a lower bound for future flood rates.
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- 2024
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40. Global scientific trends in healthy aging in the early 21st century: A data-driven scientometric and visualized analysis
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Ye Zhang, Zhengmin Gu, Yingxin Xu, Miao He, Ben S. Gerber, Zhongqing Wang, Feifan Liu, and Cheng Peng
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Healthy aging ,Older adults ,Scientometric analysis ,Data visualization ,VOSviewer ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Background: According to the World Health Organization (WHO), healthy aging is the process of developing and maintaining the functional capacity for health in old age. A rapidly growing number of research studies on healthy aging have been conducted worldwide. The purpose of this research work is to explore global scientific landscape of healthy aging research over the last 22 years. Methods: Scientific publications on healthy aging from January 1, 2000 to October 11, 2022 were retrieved from the Web of Science Core Collection (WoSCC) on October 11, 2022. A total of 6420 publications were included in the scientometric analysis. VOSviewer (1.6.18) was used to conduct scientometric and visualized analysis. Results: The publication growth rate was 35.68 from 2000 to 2021. The United States of America (USA) led in both productivity and citations. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA was prominent in terms of both the highest citation count and the highest average citation count. The National Institute on Aging (NIA) and Evans, Michele K. were the most influential organization and author, respectively. Research hotspots in healthy aging were identified based on the co-occurrence analysis of keywords: (1) physical activity and mental health of older adults; (2) diseases impacting the health and lifespan of older adults; and (3) neuroscience. Our analysis indicates that gut microbiota, loneliness, frailty, mitochondria and resilience were the emerging themes in healthy aging research. Conclusions: The quantity of annual publications on healthy aging has rapidly increased over the past 22 years, especially during 2018–2021. This analysis identified the status, trends, hot topics, and frontiers of healthy aging research. These findings will help researchers quickly understand the global representation of healthy aging research, influence resource dissemination, promote international collaborations, guide policy formulation, and improve health services for older adults.
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- 2024
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41. The Impact of a Centralized Plastic Surgery Research Infrastructure on Scholarly Productivity and Output
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Sobti, Nikhil, Rhee, Ben S., Soliman, Luke, Rao, Vinay, Kwan, Daniel, Woo, Albert S., Bhatt, Reena, Kalliainen, Loree, Breuing, Karl, and Liu, Paul
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- 2024
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42. Trading Activity in the Corporate Bond Market: A SAD Tale of Macro-Announcements and Behavioral Seasonality?
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James J. Forest, Ben S. Branch, and Brian T. Berry
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macroeconomic announcements ,corporate bonds ,trading ,Autometrics ,seasonality ,seasonal affective disorder ,Insurance ,HG8011-9999 - Abstract
This study investigates the determinants of trading activity in the U.S. corporate bond market, focusing on the effects of Seasonal Affective Disorder (SAD) and macroeconomic announcements. Employing the General-to-Specific (Gets) Autometrics methodology, we identify distinct behavioral responses between retail and institutional investors to SAD, noting a significant impact on retail trading volumes but not on institutional trading or bond returns. This discovery extends the understanding of behavioral finance within the context of bond markets, diverging from established findings in equity and Treasury markets. Additionally, our analysis delineates the influence of macroeconomic announcements on trading activities, offering new insights into the market’s reaction to economic news. This study’s findings contribute to the broader literature on market microstructure and behavioral finance, providing empirical evidence on the interplay between psychological factors and macroeconomic information flow within corporate bond markets. By addressing these specific aspects with rigorous econometric techniques, our research enhances the comprehension of trading dynamics in less transparent markets, offering valuable perspectives for academics, investors, risk managers, and policymakers.
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- 2024
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43. SP01. An Analysis Of Public Perceptions On Cosmetic Tourism And Motivational Factors For Geographic Choice Of Cosmetic Procedures
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Ben S. Rhee, BA, Viknesh S. Kasthuri, AB, and Lauren O. Roussel, MD
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Surgery ,RD1-811 - Published
- 2024
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44. Circular Polarization of Simulated Images of Black Holes
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Abhishek V. Joshi, Ben S. Prather, Chi-kwan Chan, Maciek Wielgus, and Charles F. Gammie
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Supermassive black holes ,Accretion ,Low-luminosity active galactic nuclei ,Magnetohydrodynamics ,Radiative transfer ,Polarimetry ,Astrophysics ,QB460-466 - Abstract
Models of the resolved Event Horizon Telescope (EHT) sources Sgr A* and M87* are constrained by observations at multiple wavelengths, resolutions, polarizations, and time cadences. In this paper, we compare unresolved circular polarization (CP) measurements to a library of models, where each model is characterized by a distribution of CP over time. In the library, we vary the spin of the black hole, the magnetic field strength at the horizon (i.e., both SANE and magnetically arrested disk or MAD models), the observer inclination, a parameter for the maximum ion–electron temperature ratio assuming a thermal plasma, and the direction of the magnetic field dipole moment. We find that Atacama Large Millimeter/submillimeter Array (ALMA) observations of Sgr A* are inconsistent with all edge-on ( i = 90°) models. Restricting attention to the MAD models favored by earlier EHT studies of Sgr A*, we find that only models with magnetic dipole moment pointing away from the observer are consistent with ALMA data. We also note that in 26 of the 27 passing MAD models, the accretion flow rotates clockwise on the sky. We provide a table of the means and standard deviations of the CP distributions for all model parameters, along with their trends.
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- 2024
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45. The 230 GHz Variability of Numerical Models of Sagittarius A*. I. Parameter Surveys on Varying the Ion-to-electron Temperature Ratio Under Strongly Magnetized Conditions
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Ho-Sang Chan, Chi-kwan Chan, Ben S. Prather, George N. Wong, and Charles Gammie
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Radio astronomy ,Radiative transfer ,High energy astrophysics ,Plasma astrophysics ,Black hole physics ,Black holes ,Astrophysics ,QB460-466 - Abstract
The 230 GHz lightcurves of Sagittarius A* (Sgr A*) predicted by general relativistic magnetohydrodynamics and general relativistic ray-tracing (GRRT) models by the Event Horizon Telescope Collaboration have higher variability M _Δ _T compared to observations. In this series of papers, we explore the origin of such large brightness variability. In this first paper, we performed large GRRT parameter surveys that span from the optically thin to the optically thick regimes, covering the ion-to-electron temperature ratio under strongly magnetized conditions, R _Low , from 1 to 60. We find that increasing R _Low can lead to either an increase or a reduction in M _Δ _T depending on the other model parameters, making it consistent with the observed variability of Sgr A* in some cases. Our analysis of GRRT image snapshots finds that the major contribution to the large M _Δ _T for the R _Low = 1 models comes from the photon ring. However, secondary contributions from the accretion flow are also visible depending on the spin parameter. Our work demonstrates the importance of the electron temperature used for modeling radiatively inefficient accretion flows and places new constraints on the ion-to-electron temperature ratio. A more in-depth analysis for understanding the dependencies of M _Δ _T on R _Low will be performed in subsequent papers.
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- 2024
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46. Structural Transformations of Metal–Organic Cages through Tetrazine-Alkene Reactivity.
- Author
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Black, Martin R., Bhattacharyya, Soumalya, Argent, Stephen P., and Pilgrim, Ben S.
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- 2024
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47. Migratory birds modulate niche tradeoffs in rhythm with seasons and life history.
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Yanco, Scott W., Oliver, Ruth Y., Iannarilli, Fabiola, Carlson, Ben S., Heine, Georg, Mueller, Uschi, Richter, Nina, Vorneweg, Bernd, Andryushchenko, Yuriy, Batbayar, Nyambayar, Dagys, Mindaugas, Desholm, Mark, Galtbalt, Batbayar, Gavrilov, Andrey E., Goroshko, Oleg A., Ilyashenko, Elena I., Ilyashenko, Valentin Yu, Månsson, Johan, Mudrik, Elena A., and Natsagdorj, Tseveenmyadag
- Subjects
RESOURCE availability (Ecology) ,CRANES (Birds) ,NATURAL history ,MIGRATORY birds ,ANIMAL mechanics - Abstract
Movement is a key means by which animals cope with variable environments. As they move, animals construct individual niches composed of the environmental conditions they experience. Niche axes may vary over time and covary with one another as animals make tradeoffs between competing needs. Seasonal migration is expected to produce substantial niche variation as animals move to keep pace with major life history phases and fluctuations in environmental conditions. Here, we apply a time-ordered principal component analysis to examine dynamic niche variance and covariance across the annual cycle for four species of migratory crane: common crane (Grus grus, n = 20), demoiselle crane (Anthropoides virgo, n = 66), black-necked crane (Grus nigricollis, n = 9), and white-naped crane (Grus vipio, n = 9). We consider four key niche components known to be important to aspects of crane natural history: enhanced vegetation index (resources availability), temperature (thermoregulation), crop proportion (preferred foraging habitat), and proximity to water (predator avoidance). All species showed a primary seasonal niche "rhythm" that dominated variance in niche components across the annual cycle. Secondary rhythms were linked to major species-specific life history phases (migration, breeding, and nonbreeding) as well as seasonal environmental patterns. Furthermore, we found that cranes' experiences of the environment emerge from time-dynamic tradeoffs among niche components. We suggest that our approach to estimating the environmental niche as a multidimensional and time-dynamical system of tradeoffs improves mechanistic understanding of organism-environment interactions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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48. CONSTRAINED LOCAL APPROXIMATE IDEAL RESTRICTION FOR ADVECTION-DIFFUSION PROBLEMS.
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ALI, AHSAN, BRANNICK, JAMES J., KAHL, KARSTEN, KRZYSIK, OLIVER A., SCHRODER, JACOB B., and SOUTHWORTH, BEN S.
- Abstract
This paper focuses on developing a reduction-based algebraic multigrid (AMG) method that is suitable for solving general (non)symmetric linear systems and is naturally robust from pure advection to pure diffusion. Initial motivation comes from a new reduction-based AMG approach, ℓAIR (local approximate ideal restriction), that was developed for solving advection-dominated problems. Though this new solver is very effective in the advection-dominated regime, its performance degrades in cases where diffusion becomes dominant. This is consistent with the fact that in general, reduction-based AMG methods tend to suffer from growth in complexity and/or convergence rates as the problem size is increased, especially for diffusion-dominated problems in two or three dimensions. Motivated by the success of ℓAIR in the advective regime, our aim in this paper is to generalize the AIR framework with the goal of improving the performance of the solver in diffusion-dominated regimes. To do so, we propose a novel way to combine mode constraints as used commonly in energy-minimization AMG methods with the local approximation of ideal operators used in ℓAIR. The resulting constrained ℓAIR algorithm is able to achieve fast scalable convergence on advective and diffusive problems. In addition, it is able to achieve standard low complexity hierarchies in the diffusive regime through aggressive coarsening, something that was previously difficult for reduction-based methods. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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49. An Analysis of Pandemic-Era Inflation in 11 Economies.
- Author
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Blanchard, Olivier J. and Bernanke, Ben S.
- Published
- 2024
50. A Fast Algebraic Multigrid Solver and Accurate Discretization for Highly Anisotropic Heat Flux I: Open Field Lines
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Wimmer, Golo A., primary, Southworth, Ben S., additional, Gregory, Thomas J., additional, and Tang, Xian-Zhu, additional
- Published
- 2024
- Full Text
- View/download PDF
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