Results 81 to 90 of about 36,417 (233)

Advanced numerical methods in astrophysical fluid dynamics

, 2007
25 pages, 11 figures,
Hujeirat, A., Keil, B. W., Heitsch, F.
openaire   +2 more sources

ReMoDe – Recursive modality detection in distributions of ordinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The detection of the number of modes in distributions of ordinal data is relevant for applied researchers across disciplines, from uncovering polarization to detecting incidence groups in clinical symptom scales. Yet, established modality detection methods are either purely descriptive or not developed for ordinal data.
Madlen Hoffstadt, Lourens Waldorp, Javier Garcia‐Bernardo, Han van der Maas   +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

On Validating an Astrophysical Simulation Code

, 2002
We present a case study of validating an astrophysical simulation code. Our study focuses on validating FLASH, a parallel, adaptive-mesh hydrodynamics code for studying the compressible, reactive flows found in many astrophysical environments.
A. C. Calder, B. A. Remington, B. Fryxell, Blinnikov S. I., Blottner F. G., Dyakov S. P., F. X. Timmes, Freeman N. C., G. Dimonte, Garcia-Senz D., Godunov S. K., H. F. Robey, H. M. Tufo, J. O. Kane, Janka H.-Th., Jeans J. H., K. Olson, Kercek A., Kercek A., L. J. Dursi, Lamb D. Q., Lewin W. H. G., Livio M., M. Zingale, Monchmeyer R., Moore G. E., P. MacNeice, P. Ricker, Pilch M., Potekhin A. Y., Potekhin A. Y., R. P. Drake, R. Rosner, Reinecke M., Rosner R., Steinmetz M., T. Dupont, T. Plewa, Taylor G., V. G. Weirs, Venn J., Young Y.-N., Youngs D. L.   +42 more
core   +1 more source

Design Considerations for Visualization Transitions of 3D Spatial Data in Hybrid AR‐Desktop Environments

Computer Graphics Forum, EarlyView.
We present design considerations for animated transitions of the appearance of 3D spatial datasets in a hybrid Augmented Reality‐desktop context. Such hybrid interfaces combine both traditional and immersive displays to facilitate the exploration of 2D and 3D data representations in the environment in which they are best displayed.
Yucheng Lu, Tobias Rau, Benjamin Lee, Andreas Köhn, Michael Sedlmair, Christian Sandor, Tobias Isenberg   +6 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

Elliptical instability in hot Jupiter systems

, 2013
Several studies have already considered the influence of tides on the evolution of systems composed of a star and a close-in companion to tentatively explain different observations such as the spin-up of some stars with hot Jupiters, the radius anomaly ...
Bars, Michael Le, Cébron, David, Gal, Patrice Le, Leconte, J., Moutou, Claire, Sauret, Alban   +5 more
core   +1 more source

Reinforcement Learning for Jump‐Diffusions, With Financial Applications

Mathematical Finance, EarlyView.
ABSTRACT We study continuous‐time reinforcement learning (RL) for stochastic control in which system dynamics are governed by jump‐diffusion processes. We formulate an entropy‐regularized exploratory control problem with stochastic policies to capture the exploration–exploitation balance essential for RL.
Xuefeng Gao, Lingfei Li, Xun Yu Zhou
wiley   +1 more source

Excitation of Inertial Modes in 3D Simulations of Rotating Convection in Planets and Stars

The Astrophysical Journal
Thermal convection in rotating stars and planets drives anisotropic turbulence and differential rotation, both capable of feeding energy into global oscillations.
J. R. Fuentes, Ankit Barik, Jim Fuller
doaj   +1 more source

Particle acceleration and radiation friction effects in the filamentation instability of pair plasmas

, 2015
The evolution of the filamentation instability produced by two counter-streaming pair plasmas is studied with particle-in-cell (PIC) simulations in both one (1D) and two (2D) spatial dimensions.
D'Angelo, M., Fedeli, L., Macchi, A., Pegoraro, F., Sgattoni, A.   +4 more
core   +1 more source