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temporisation de la retombée

fall time

électronique et électrotechnique - iate.europa.eu

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Apj submitted t typeset using latex style emulateapj v. 11/10/09 on the interplay between star formation and feedback in galaxy formation simulations... In particular, we find that in models with efficient feedback, the local efficiency of star for-mation per free fall time can be substantially larger than the global star formation efficiency inferred from the Kennicutt-Schmidt relation....

électronique et électrotechnique - core.ac.uk - PDF: arxiv.org

Turbulence, feedback, and slow star formation... Giant molecular clouds convert only a few percent of their gas intostars per free-fall time, and recent observations show that this low starformation rate is essentially constant over a range of scales from individualcluster-forming molecular clumps in the ...

PDF: arxiv.org

Publications scientifiques

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Optical precursors with finite rise and fall timeWe report results of both theoretical and experimental studies of optical precursors generated from a square-modulated probe laser pulse having a finite rise and fall time and propagating through a cold atomic ensemble, under the conditions of either a two-level Lorentz absorber system or a three-level system with electromagnetically induced...

général - core.ac.uk - PDF: www.scopus.com

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The free-fall time of finite sheets and filaments... We computethe free-fall time ($\tff$) for finite, uniform, self-gravitating circularsheets and filamentary clouds of small but finite thickness, so that theirvolume density $\rho$ can still be defined....

général - core.ac.uk - PDF: arxiv.org

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Design and operation influences regarding rise and fall time of a photoconductive microwave switch...works.This paper evaluates the effect switch design and control method have on the rise and fall time of a photoconductive microwave switch at 2GHz....

général - core.ac.uk - PDF: core.ac.uk