Results 81 to 90 of about 258,357 (262)

Newtonian nonlinear hydrodynamics and magnetohydrodynamics

, 2008
We use covariant methods to analyse the nonlinear evolution of self-gravitating, non-relativistic media. The formalism is first applied to imperfect fluids, aiming at the kinematic effects of viscosity, before extended to inhomogeneous magnetised ...
Barrow, Barrow, Barrow, Barrow, Bruni, Carter, Carter, Chandrasekhar, Christos G. Tsagas, Contopoulos, Dolag, Ehlers, Ellis, Ellis, Ellis, Ellis, Giovannini, Heckmann, Heckmann, Holt, Kandus, Kleidis, Kormendy, Krall, Mestel, Nicolaos K. Spyrou, Papadopoulos, Parker, Raychaudhuri, Spyrou, Spyrou, Tsagas, Tsagas, Tsagas, Tsagas, Tsagas, Tsagas, Tsagas, Urry, Vlahos, Zeldovich   +40 more
core   +1 more source

Small but mighty: Impact hazards from iron Near‐Earth Objects

Meteoritics &Planetary Science, EarlyView.
Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther, Natalia Artemieva, Andrea Schmalen, Kai Wünnemann, Detlef Koschny, Richard Moissl   +5 more
wiley   +1 more source

Ultraviolet C (UV‐C) Light Therapy Inhibits Pathogens Associated With Equine Keratomycosis at Different Corneal Depths—An Ex Vivo Study

Veterinary Ophthalmology, EarlyView.
ABSTRACT Objective To assess if an inexpensive, commercially available ultraviolet C (UV‐C) light device with a peak emission of 275 nm can inhibit equine keratomycosis‐associated pathogens located at different corneal depths in an ex vivo model. Methods A controlled, randomized experimental design.
Mona Hoerdemann, Dipak K. Sahoo, Rachel A. Allbaugh, Melissa A. Kubai   +3 more
wiley   +1 more source

A discontinuous Galerkin method for solving the fluid and MHD equations in astrophysical simulations

, 2013
A discontinuous Galerkin (DG) method suitable for large-scale astrophysical simulations on Cartesian meshes as well as arbitrary static and moving Voronoi meshes is presented.
Hernquist, Lars, Mocz, Philip, Pakmor, Ruediger, Sijacki, Debora, Vogelsberger, Mark   +4 more
core   +1 more source

A localised subgrid scale model for fluid dynamical simulations in astrophysics [PDF]

Astronomy & Astrophysics, 2006
We present a one-equation subgrid scale model that evolves the turbulence energy corresponding to unresolved velocity fluctuations in large eddy simulations. The model is derived in the context of the Germano consistent decomposition of the hydrodynamical equations. The eddy-viscosity closure for the rate of energy transfer from resolved toward subgrid
Schmidt, W., Niemeyer, J. C., Hillebrandt, W.   +2 more
openaire   +4 more sources

Futures of Everyday Life: A Qualitative Content Analysis of Future Personas in Scenarios

FUTURES &FORESIGHT SCIENCE, Volume 8, Issue 1, April 2026.
ABSTRACT Scenario reports, holding a long‐standing tradition in foresight and futures studies, act as an essential document for organizations to prepare for possible, plausible, and alternative futures. Focusing on descriptions and representations of everyday life, we examined 29 future persona narratives from six publications—covering a wide field ...
Gerhard Schönhofer, Pauli Komonen, Jan Oliver Schwarz, Laura Bechthold   +3 more
wiley   +1 more source

CloudFlex: A Flexible Parametric Model for the Small-scale Structure of the Circumgalactic Medium

The Astrophysical Journal
We present CloudFlex , an open-source tool for predicting absorption-line signatures of cool gas in galaxy halos with small-scale structure. Motivated by analyses of ∼10 ^4 K material in hydrodynamical simulations of turbulent, multiphase media, we model
Cameron B. Hummels, Kate H. R. Rubin, Evan E. Schneider, Drummond B. Fielding   +3 more
doaj   +1 more source

Mechanisms for Multi-Scale Structures in Dense Degenerate Astrophysical Plasmas

, 2016
Two distinct routes lead to the creation of multi--scale equilibrium structures in dense degenerate plasmas, often met in astrophysical conditions. By analyzing an e-p-i plasma consisting of degenerate electrons and positrons with a small contamination ...
Berezhiani, V. I., Mahajan, S. M., Shatashvili, N. L.   +2 more
core   +1 more source

Performance and Cost Evaluation of StarPU on AWS: Case Studies With Dense Linear Algebra Kernels and N‐Body Simulations

Concurrency and Computation: Practice and Experience, Volume 38, Issue 3, February 2026.
ABSTRACT Task‐based programming interfaces introduce a paradigm in which computations are decomposed into fine‐grained units of work known as “tasks”. StarPU is a runtime system originally developed to support task‐based parallelism on on‐premise heterogeneous architectures by abstracting low‐level hardware details and efficiently managing resource ...
Vanderlei Munhoz, Vinicius G. Pinto, João V. F. Lima, Márcio Castro, Daniel Cordeiro, Emilio Francesquini   +5 more
wiley   +1 more source

Temporal Properties of Compressible Magnetohydrodynamic Turbulence

The Astrophysical Journal
Describing the temporal properties of compressible magnetohydrodynamic (MHD) turbulence is a fundamental problem that has important implications for particle acceleration and transport in astrophysical plasmas.
Ka Ho Yuen, Hui Li, Huirong Yan
doaj   +1 more source