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Träfflista för sökning "AMNE:(NATURAL SCIENCES Physical Sciences) "

Sökning: AMNE:(NATURAL SCIENCES Physical Sciences)

  • Resultat 31-40 av 86783
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31.
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32.
  • Franz, Jan, 1973, et al. (författare)
  • Molecule Formation by Radiative Association
  • 2010
  • Ingår i: The Chemical Cosmos: Understanding Chemistry in Astronomical Environments.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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33.
  • Franz, Jan, 1973, et al. (författare)
  • Molecule Formation in Interstellar Space
  • 2010
  • Ingår i: Department of Chemical- and Biological Engineering at Chalmers University of Technology and Chemistry at University of Gothenburg.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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34.
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35.
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36.
  • Blennow, Kristina, et al. (författare)
  • Societal impacts of storm damage
  • 2013
  • Ingår i: Living with Storm Damage to Forests. What science can tell us. - 9789525980097 ; :3, s. 70-77
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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37.
  • Eriksson, Urban, Lektor i fysik med inriktning mot fysikdidaktik, 1968- (författare)
  • Disciplinary discernment : reading the sky in astronomy education
  • 2019
  • Ingår i: Physical review physics education research. - : American Physical Society. - 2469-9896. ; 15:1
  • Tidskriftsartikel (refereegranskat)abstract
    • This theoretical paper introduces a new way to view and characterize learning astronomy. It describes a framework, based on results from empirical data, analyzed through standard qualitative research method- ology, in which a theoretical model for a vital competency of learning astronomy is proposed: reading the sky, a broad description under with various skills and competencies are included. This model takes into account not only disciplinary knowledge but also disciplinary discernment and extrapolating three dimensionality. Together, these constitute the foundation for the competency referred to as reading the sky. In this paper, these competencies are described and discussed and merged to form a new framework vital for learning astronomy to better match the challenges students face when entering the discipline of astronomy.
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38.
  • Dall` Olio, Daria, 1981, et al. (författare)
  • Costellazione Manga: explaining astronomy using Japanese comics and animation
  • 2018
  • Ingår i: Communicating Astronomy with the Public Journal. - 1996-563X .- 1996-5621. ; :24, s. 7-16
  • Tidskriftsartikel (refereegranskat)abstract
    • Comics and animation are intensely engaging and can be successfully used to communicate science to the public. They appear to stimulate many aspects of the learning process and can help with the development of links between ideas. Given these pedagogical premises, we conducted a project called Costellazione Manga, in which we considered astronomical concepts present in several manga and anime (Japanese comics and animations) and highlighted the physics behind them. These references to astronomy allowed us to introduce interesting topics of modern astrophysics and communicate astronomy-related concepts to a large spectrum of people. In this paper, we describe the methodology and techniques that we developed and discuss the results of our project. Depending on the comic or anime considered, we can introducegeneral topics such as the difference between stars, planets and galaxies or ideas such as the possibility of nding life onother planets, the latest discoveries of Earth-like planets orbiting other stars or the detection of complex organic molecules in the interstellar space. When presenting the night sky and the shapes of constellations, we can also describe how the same stars are perceived and grouped by different cultures. The project outcomes indicate that Costellazione Manga is a powerful tool to popularise astronomy and stimulate important aspects of learning development, such as curiosity and critical thinking. We show through our experience that Costellazione Manga has attracted a broader and more diverse public than traditional planetarium activities and astronomy lectures.
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39.
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40.
  • Wang, Y. J., et al. (författare)
  • The secondary formation of organosulfates under interactions between biogenic emissions and anthropogenic pollutants in summer in Beijing
  • 2018
  • Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 18:14, s. 10693-10713
  • Tidskriftsartikel (refereegranskat)abstract
    • Organosulfates (OSs) with ambiguous formation mechanisms are a potential source of "missing secondary organic aerosol (SOA)" in current atmospheric models. In this study, we chemically characterized OSs and nitrooxy-OSs (NOSs) formed under the influence of biogenic emissions and anthropogenic pollutants (e.g., NOx, SO42-) in summer in Beijing. An ultrahigh-resolution mass spectrometer equipped with an electrospray ionization source was applied to examine the overall molecular composition of S-containing organics. The number and intensities of S-containing organics, the majority of which could be assigned as OSs and NOSs, increased significantly during pollution episodes, which indicated their importance for SOA accumulation. To further investigate the distribution and formation of OSs and NOSs, high-performance liquid chromatography coupled with mass spectrometry was employed to quantify 10 OSs and 3 NOS species. The total concentrations of quantified OSs and NOSs were 41.4 and 13.8 ng m(-3), respectively. Glycolic acid sulfate was the most abundant species among all the quantified species, followed by monoterpene NOSs (C10H16NO7S-). The total concentration of three isoprene OSs was 14.8 ng m(-3) and the isoprene OSs formed via the HO2 channel were higher than those formed via the NO/NO2 channel. The OS concentration coincided with the increase in acidic sulfate aerosols, aerosol acidity, and liquid water content (LWC), indicating the acid-catalyzed aqueousphase formation of OSs in the presence of acidic sulfate aerosols. When sulfate dominated the accumulation of secondary inorganic aerosols (SIAs; sulfate, nitrate, and ammonium; SO42-/SIA > 0.5), OS formation would obviously be promoted as the increasing of acidic sulfate aerosols, aerosol LWC, and acidity (pH < 2.8). Otherwise, acid-catalyzed OS formation would be limited by lower aerosol acidity when nitrate dominated the SIA accumulation. The nighttime enhancement of monoterpene NOSs suggested their formation via the nighttime NO3-initiated oxidation of monoterpene under high-NOx conditions. However, isoprene NOSs are presumed to form via acid-catalyzed chemistry or reactive uptake of oxidation products of isoprene. This study provides direct observational evidence and highlights the secondary formation of OSs and NOSs via the interaction between biogenic precursors and anthropogenic pollutants (NOx, SO2, and SO42-). The results imply that future reduction in anthropogenic emissions can help to reduce the biogenic SOA burden in Beijing or other areas impacted by both biogenic emissions and anthropogenic pollutants.
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