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pro vyhledávání: '"Santos, Júlia"'
Multi-objective unconstrained combinatorial optimization problems (MUCO) are in general hard to solve, i.e., the corresponding decision problem is NP-hard and the outcome set is intractable. In this paper we explore special cases of MUCO problems tha
Externí odkaz:
http://arxiv.org/abs/2412.01465
Autor:
Slavicinska, Katerina, Boogert, Adwin, Tychoniec, Łukasz, van Dishoeck, Ewine F., van Gelder, Martijn L., Santos, Julia C., Klaassen, Pamela D., Kavanagh, Patrick J., Chuang, Ko-Ju
Sulfur is depleted with respect to its cosmic standard abundance in dense star-forming regions. It has been suggested that this depletion is caused by the freeze-out of sulfur on interstellar dust grains, but the observed abundances and upper limits
Externí odkaz:
http://arxiv.org/abs/2410.02860
Publikováno v:
A&A 690, A24 (2024)
Carbonyl sulfide (OCS) is widely observed in the gas phase towards star-forming regions and was the first of the only two sulfur-bearing species detected in interstellar ices so far. However, the chemical network governing its formation is still not
Externí odkaz:
http://arxiv.org/abs/2408.03997
Autor:
Santos, Julia C., van Gelder, Martijn L., Nazari, Pooneh, Ahmadi, Aida, van Dishoeck, Ewine F.
Publikováno v:
A&A 689, A248 (2024)
We investigate the chemical history of interstellar OCS and SO2 by deriving a statistically-significant sample of gas-phase column densities towards massive protostars and comparing to observations of gas and ices towards other sources spanning from
Externí odkaz:
http://arxiv.org/abs/2407.14711
The chemical network governing interstellar sulfur has been the topic of unrelenting discussion for the past decades due to the conspicuous discrepancy between its expected and observed abundances in different interstellar environments. More recently
Externí odkaz:
http://arxiv.org/abs/2407.09730
Autor:
Mainer, José Carlos
Publikováno v:
Ayer, 2010 Jan 01(78), 289-302.
Externí odkaz:
https://www.jstor.org/stable/41326076
Akademický článek
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Autor:
Santos, Julia Sudhoff, Kroll, Lars
The safety of streets is difficult to quantify numerically. However, it is possible to sort streets regarding their safety into ordered categories, like safe, neutral and unsafe. In this paper we model the computation of safe bicycle routes as an opt
Externí odkaz:
http://arxiv.org/abs/2403.18363
Akademický článek
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Hydrogen sulfide (H$_2$S) is thought to be efficiently formed on grain surfaces through the successive hydrogenation of S atoms. Its non-detection so far in astronomical observations of icy dust mantles thus indicates that effective destruction pathw
Externí odkaz:
http://arxiv.org/abs/2308.07960