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  • 43.35.Hl  (1)
  • 72.40.+w  (1)
  • Homo antecessor  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Scenario of the electric breakdown and UV radiation spectra in single-bubble sonoluminescence (1999)
    Springer
    JETP letters 70 (1999), S. 431-437 
    Details
    ISSN: 1090-6487
    Schlagwort(e): 43.35.Hl ; 78.60.Mq ; 47.55.Dz
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract In a preceding paper we put forward the hypothesis that the single-bubble sonoluminescence (SBSL) is caused by strong electric fields arising near the surface of a collapsing gas bubble on account of the flexoelectric effect in water. Here we argue that these fields can indeed provoke a multiple electric breakdown in water, in a micron-size region near the surface of the collapsing gas bubble, and show that the main numerical characteristics of the SBSL can be naturally explained within this mechanism. The SBSL spectra are determined by radiative transitions between high-energy levels of noble-gas atoms excited by hot electrons produced by the strong flexoelectric field in “cold” water.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1134/1.568192
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Sonoluminescence: A new electrical breakdown hypothesis (1996)
    Springer
    JETP letters 64 (1996), S. 907-910 
    Details
    ISSN: 1090-6487
    Schlagwort(e): 72.40.+w
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We discuss an hypothesis wherein single-bubble sonoluminescence is attributed to electrical breakdown due to large pressure gradients existing for small bubble radii. These large gradients produce large electric fields (the flexoelectric effect) that lead to electrical breakdown, releasing energies up to 10−10 J, which is much larger than the light energy released in each cycle. This hypothesis appears to be consistent with several observations made in studies of the sonoluminescence process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1134/1.567246
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    The Atapuerca human fossils (2000)
    Springer
    Human evolution 15 (2000), S. 75-82 
    Details
    ISSN: 1824-310X
    Schlagwort(e): Atapuerca ; Sima de los Huesos ; Homo heidelbergensis ; Gran Dolina ; Homo antecessor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract After 20 years of research, the Atapuerca sites have provided a large amount of archaeological and palaeontological remains. Human fossils have been found in three sites: Gran Dolina, galería and Sima de los Huesos. The Early Pleistocene human fossils from Gran Dolina have been ascribed to a new species,Homo antecessor, that represent the last common ancestor of Neandertals and modern humans. The Sima de los Huesos fossils and all the European Middle Pleistocene human fossils are the ancestors exclusively of the Neandertals, which evolved in Europe in conditions of geographic and genetic isolation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02436236
    Standort Signatur Erwartet Verfügbarkeit
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