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  • 2020-2023  (4)
  • 2021  (4)
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  • 1
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    NetworkDynamics.jl—Composing and simulating complex networks in Julia (2021)
    In:  Chaos
    Details
    Publication Date: 2022-03-21
    Description: Simulations of complex systems on networks such as power grids, with many dfferent types of node and line dynamics are challenging to build and to optimize for performance. Available software is either proprietary or mixes higher-level scripting languages with low-level compiled languages to provide a convenient user interface while main- taining computational efficacy. The emerging programming language Julia ffers a unique en- vironment that allows to achieve both within a single language while overcoming some of the lim- itations of previous approaches. In this paper we present our open-source package NetworkDynam- ics.jl that opens up Julia's potential to the net- work science community. This article is based on NetworkDynamics.jl v0.5.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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    CITATION PIK
  • 2
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    Fever and hypothermia represent two populations of sepsis patients and are associated with outside temperature (2021)
    In:  Critical Care
    Details
    Publication Date: 2022-03-22
    Description: Background: Fever and hypothermia have been observed in septic patients. Their influence on prognosis is subject to ongoing debates. Methods: We did a secondary analysis of a large clinical dataset from a quality improvement trial. A binary logistic regression model was calculated to assess the association of the thermal response with outcome and a multinomial regression model to assess factors associated with fever or hypothermia. Results: With 6542 analyzable cases we observed a bimodal temperature response characterized by fever or hypothermia, normothermia was rare. Hypothermia and high fever were both associated with higher lactate values. Hypothermia was associated with higher mortality, but this association was reduced after adjustment for other risk factors. Age, community-acquired sepsis, lower BMI and lower outside temperatures were associated with hypothermia while bacteremia and higher procalcitonin values were associated with high fever. Conclusions: Septic patients show either a hypothermic or a fever response. Whether hypothermia is a maladaptive response, as indicated by the higher mortality in hypothermic patients, or an adaptive response in patients with limited metabolic reserves under colder environmental conditions, remains an open question. Trial registration The original trial whose dataset was analyzed was registered at ClinicalTrials.gov (NCT01187134) on August 23, 2010, the first patient was included on July 1, 2011.
    Language: English
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 3
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    Predicting Dynamic Stability of Power Grids using Graph Neural Networks (2021)
    CERN / Zenodo
    Details
    Publication Date: 2022-07-26
    Type: info:eu-repo/semantics/workingPaper
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  • 4
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    Formation of chondrule analogs aboard the International Space Station (2021)
    Details
    Publication Date: 2022-03-30
    Description: Chondrules are thought to play a crucial role in planet formation, but the mechanisms leading to their formation are still a matter of unresolved discussion. So far, experiments designed to understand chondrule formation conditions have been carried out only under the influence of terrestrial gravity. In order to introduce more realistic conditions, we developed a chondrule formation experiment, which was carried out at long‐term microgravity aboard the International Space Station. In this experiment, freely levitating forsterite (Mg2SiO4) dust particles were exposed to electric arc discharges, thus simulating chondrule formation via nebular lightning. The arc discharges were able to melt single dust particles completely, which then crystallized with very high cooling rates of 〉105 K h−1. The crystals in the spherules show a crystallographic preferred orientation of the [010] axes perpendicular to the spherule surface, similar to the preferred orientation observed in some natural chondrules. This microstructure is probably the result of crystallization under microgravity conditions. Furthermore, the spherules interacted with the surrounding gas during crystallization. We show that this type of experiment is able to form spherules, which show some similarities with the morphology of chondrules despite very short heating pulses and high cooling rates.
    Description: Carl Zeiss Meditec AG http://dx.doi.org/10.13039/501100002806
    Description: BIOVIA Science Ambassador program
    Description: Bundesministerium für Wirtschaft und Energie http://dx.doi.org/10.13039/501100006360
    Description: Deutsches Zentrum für Luft‐ und Raumfahrt http://dx.doi.org/10.13039/501100002946
    Description: NanoRacks LLC
    Description: DreamUp
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Dr. Rolf M. Schwiete Stiftung
    Keywords: ddc:549 ; ddc:550.78
    Language: English
    Type: doc-type:article
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