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Table 1

Effect of package splitting on the noise level in the molecular cloud model.

rms noise level (arbitrary units)
External radiation Internal sources
Hierarchy level With resampling No resampling With resampling No resampling

0 0.14 0.13 0.28 0.03
1 0.14 0.25 0.32 0.10
2 0.16 0.50 0.58 0.29
3 0.17 1.00 1.00 0.95

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