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  • 1
    UID:
    (DE-602)kobvindex_DGP1477230734
    Format: Online Ressource
    Edition: Online-Ausg.
    ISSN: 0014-2476
    Content: In der Online Fassung unter www.internationalepolitik.de enthalten
    Content: Mitteilung der Europäischen Kommission an den Rat und das Europäische Parlament über den Anteil erneuerbarer Energien in der EU (Brüssel, 26.5.04) (Auszüge). - Prime Minister Tony Blair's video address to the International Conference for Renewable Energies (Bonn, 1.-4.6.04). - Politikempfehlung für erneuerbare Energien, verabschiedet von der Internationalen Konferenz für Erneuerbare Energien (Bonn, 4.6.04) (gekürzt)
    Content: In der Printfassung enthalten
    Content: Artikel des amerikanischen Energieministers, Spencer Abraham, veröffentlicht in der Mai-Ausgabe 2004 der Online Zeitchrift "Economic Perspectives" des State Department (2004). - Rede des Bundesministers für Umwelt, Naturschutz und Reaktorsicherheit, Jürgen Trittin, zur Förderung des Exports erneuerbarer Energietechnologien vor dem Deutschen Bundestag (Berlin, 28.5.04) (gekürzt). - Rede des amtierenden Präsidenten, des indonesischen Energieministers Purnomo Yugiantoro, zur Eröffnung der 131. (außerordentlichen) Tagung der Konferenz der Organisation Erdölexportierender Länder (OPEC) (Beirut, 3.6.04) (gekürzt). - Rede von Bundeskanzler Schröder auf der Internationalen Konferenz für Erneuerbare Energien (Bonn, 3.6.04) (gekürzt). - Politische Erklärung, verabschiedet auf der Internationalen Konferenz für Erneuerbare Energien (Bonn, 4.6.04)
    In: Internationale Politik, Berlin : Deutsche Gesellschaft für Auswärtige Politik, 1995, 59(2004), 8, Seite 123-137, 0014-2476
    Language: German
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  • 2
    UID:
    (DE-602)edochu_18452_29277
    Format: 1 Online-Ressource (28 Seiten)
    Content: The IceCube Neutrino Observatory instruments about 1 km3 of deep, glacial ice at the geographic South Pole. It uses 5160 photomultipliers to detect Cherenkov light emitted by charged relativistic particles. An unexpected light propagation effect observed by the experiment is an anisotropic attenuation, which is aligned with the local flow direction of the ice. We examine birefringent light propagation through the polycrystalline ice microstructure as a possible explanation for this effect. The predictions of a first-principles model developed for this purpose, in particular curved light trajectories resulting from asymmetric diffusion, provide a qualitatively good match to the main features of the data. This in turn allows us to deduce ice crystal properties. Since the wavelength of the detected light is short compared to the crystal size, these crystal properties include not only the crystal orientation fabric, but also the average crystal size and shape, as a function of depth. By adding small empirical corrections to this first-principles model, a quantitatively accurate description of the optical properties of the IceCube glacial ice is obtained. In this paper, we present the experimental signature of ice optical anisotropy observed in IceCube light-emitting diode (LED) calibration data, the theory and parameterization of the birefringence effect, the fitting procedures of these parameterizations to experimental data, and the inferred crystal properties.
    Content: Peer Reviewed
    In: Katlenburg-Lindau : Copernicus, 18,1, Seiten 75-102
    Language: English
    URL: Volltext  (kostenfrei)
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