Photon‐conserving Radiative Transfer around Point Sources in Multidimensional Numerical Cosmology

1999 ◽  
Vol 523 (1) ◽  
pp. 66-71 ◽  
Author(s):  
Tom Abel ◽  
Michael L. Norman ◽  
Piero Madau
Keyword(s):  
Radiative Transfer ◽  
Point Sources ◽  
Numerical Cosmology

scholarly journals Numerical Cosmology powered by GPUs

2010 ◽  
Vol 6 (S270) ◽  
pp. 397-400 ◽  
Author(s):  
Dominique Aubert
Keyword(s):  
Radiative Transfer ◽  
Graphics Processing Units ◽  
Large Scale ◽  
Numerical Calculations ◽  
Cosmological Simulations ◽  
Gpu Clusters ◽  
Graphics Processing ◽  
Large Scale Simulations ◽  
Gpu Implementation ◽  
Numerical Cosmology

AbstractGraphics Processing Units (GPUs) offer a new way to accelerate numerical calculations by means of on-board massive parallelisation. We discuss two examples of GPU implementation relevant for cosmological simulations, an N-Body Particle-mesh solver and a radiative transfer code. The latter has also been ported on multi-GPU clusters. The range of acceleration (x30-x80) achieved here offer bright perspective for large scale simulations driven by GPUs.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

The Atmospheres of AGB Stars: Opacities, Radiative Transfer and Models

2008 ◽  
Vol 28 ◽  
pp. 67-74 ◽  
Author(s):  
B. Aringer ◽  
W. Nowotny ◽  
S. Höfner
Keyword(s):  
Radiative Transfer ◽  
Agb Stars

Radiative Transfer Simulations of AGN Dust Tori

2008 ◽  
Vol 28 ◽  
pp. 121-128
Author(s):  
T. Beckert ◽  
S.F. Hönig
Keyword(s):  
Radiative Transfer
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