Results 221 to 230 of about 17,955,789 (263)
A Simple Descriptor for Solid‐State Ionic Conductors Across Chemistries
Advanced Materials, EarlyView.Researchers develop a simple and transferable descriptor, distance contraction, for solid‐state ion migration across Li‐, Na‐, K‐, and Mg‐ion conductors and diverse anion chemistries. By capturing the maximum local contraction experienced by the migrating ion, the descriptor enables rapid materials screening and unifies diverse ion‐transport mechanisms.
Ramanuja Srinivasan Saravanan +4 more
wiley +1 more source
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N-Body Simulations with GADGET-2
2013 15th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, 2013In this paper we discuss cosmological N-Body/SPH simulations on parallel computing systems with distributed memory using GADGET-2. GADGET-2 (GAlaxies with Dark matter and Gas intEracT) is a novel cosmological simulation code, written in C++ and publicly available, developed by Volker Springel at the Max-Planck-Institute for Astrophysics in Munchen ...
Victor-Lucian Spiridon +1 more
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N-body simulations with two-orders-of-magnitude higher performance using wavelets
Monthly Notices of the Royal Astronomical Society, 2003 Noise is a problem of major concern for N-body simulations of structure formation in the early Universe, and of galaxies and plasmas. Here for the first time we use wavelets to remove noise from N-body simulations of disc galaxies, and show that they ...
Alessandro B Romeo +2 more
exaly +2 more sources
Simulated Annealing for N-body systems
1994In this paper we discuss the mapping of the physical problem of 2D crystallization with spherical boundary conditions onto a Simulated Annealing model, and the mapping of this model onto a parallel computer. We discuss some aspects of the finetuning of the simulation code and the overall behaviour, stability and scalability, of our parallel ...
Voogd, J.M., Sloot, P.M.A., Dantzig, R.
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Prototyping N-body simulation in Proteus
Proceedings Sixth International Parallel Processing Symposium, 2003This paper explores the use of Proteus, an architecture-independent language suitable for prototyping parallel and distributed programs. Proteus is a high-level imperative notation based on sets and sequences with a single construct for the parallel composition of processes communicating through shared memory.
Peter Mills +3 more
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ACM Transactions on Mathematical Software, 2006
We describe four challenging N-body test problems involving the Sun and planets and use them to compare the performance of nine nonsymplectic and two symplectic integrators. Each problem has a long interval of integration and two have non-Newtonian gravitational interactions.
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We describe four challenging N-body test problems involving the Sun and planets and use them to compare the performance of nine nonsymplectic and two symplectic integrators. Each problem has a long interval of integration and two have non-Newtonian gravitational interactions.
openaire +2 more sources
Distributed Tree Structures for N-Body Simulation
1996Several particle simulation algorithms, such as the Barnes-Hut [1] and the Fast Multipole method [2], proceed by hierarchically decomposing the simulation space and representing the distribution of the simulated particles in an adaptive tree data structure which varies as the simulation proceeds.
A. Satish Pai +2 more
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N-body Simulations of the Rees-Sciama Effect
2010Using N-body cosmological simulations, we compute the derivative of the potential along the line of sight in order to estimate the integrated Sachs–Wolfe (ISW) effect and the Rees–Sciama (R-S) effect on CMB maps. By using the same seed to generate the initial conditions and changing the spatial and mass resolution we study the impact of numerical ...
Diego, José María +2 more
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Gravitational N-Body Simulations
2003This book discusses in detail all the relevant numerical methods for the classical N-body problem. It demonstrates how to develop clear and elegant algorithms for models of gravitational systems, and explains the fundamental mathematical tools needed to describe the dynamics of a large number of mutually attractive particles.
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Parallel Tree Algorithms for N-body Simulations
1999We describe a new parallel implementation of the octal-hierarchical tree N-body algorithm on SHared Memory systems (SHM) we have recently developed. Pursuing an effort to optimize as much as possible the code on a generic SHM we have modified the original algorithm introduced by Barnes and Hut, introducing a new scheme of "grouping" of particle ...
Vincenzo Antonuccio-Delogu +3 more
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