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Sökning: WFRF:(Filipovic M) > (2012-2014)

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1.
  • Ackermann, M., et al. (författare)
  • Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856
  • 2012
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 335:6065, s. 189-193
  • Tidskriftsartikel (refereegranskat)abstract
    • Gamma-ray binaries are stellar systems containing a neutron star or black hole, with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution models predict dozens in our Galaxy. A search for gamma-ray binaries with the Fermi Large Area Telescope (LAT) shows that 1FGL J1018.6-5856 exhibits intensity and spectral modulation with a 16.6-day period. We identified a variable x-ray counterpart, which shows a sharp maximum coinciding with maximum gamma-ray emission, as well as an O6V((f)) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. 1FGL J1018.6-5856 is thus a gamma-ray binary, and its detection suggests the presence of other fainter binaries in the Galaxy.
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2.
  • da Silva Sinha, Vera, et al. (författare)
  • Event-based time intervals in an Amazonian culture
  • 2012
  • Ingår i: Space and Time in Languages and Cultures Language, Culture, and Cognition. ; , s. 15-35
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • We report an ethnographic and field-experiment-based study of time intervals in Amondawa, a Tupi language and culture of Amazonia. We analyse two Amondawa time interval systems based on natural environmental events (seasons and days), as well as the Amondawa system for categorising lifespan time (“age”). Amondawa time intervals are exclusively event-based, as opposed to time-based (i.e. they are based on event-duration, rather than measured abstract time units). Amondawa has no lexicalised abstract concept of time and no practices of time reckoning, as conventionally understood in the anthropological literature. Our findings indicate that not only are time interval systems and categories linguistically and culturally specific, but that they do not depend upon a universal “concept of time”. We conclude that the abstract conceptual domain of time is not a human cognitive universal, but a cultural historical construction, semiotically mediated by symbolic and cultural-cognitive artefacts for time reckoning.
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