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  • 1985-1989  (3)
  • 1930-1934  (3)
Collection
Publisher
Language
Years
Year
  • 1
    Monograph available for loan
    Monograph available for loan
    Der neue Kosmos (1988)
    Berlin [u.a.] : Springer
    Details Availability
    Call number: FHD 146
    Type of Medium: Monograph available for loan
    Pages: XV, 434 S. : Ill.
    Edition: 4., völlig neubearb. Aufl.
    ISBN: 3540181717
    Language: German
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
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    Unknown
    On the Contours of Narrow Absorption Lines (1932)
    Institute of Physics
    Details
    Publication Date: 1932-03-01
    Print ISSN: 0004-637X
    Electronic ISSN: 1538-4357
    Topics: Physics
    Published by Institute of Physics
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    A n 4 -polyhedra with free homology (1989)
    Springer
    Manuscripta mathematica 65 (1989), S. 123-145 
    Details
    ISSN: 1432-1785
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract An A n k -polyhedron is a CW-complex which is (n−1)-connected and of dimension ≤(n+k). We compute an algebraic category which is equivalent to the homotopy category of A n 2 -polyhedra with free homology (n≥3). This computation and a calculation of the Γ-group Γn+3(X) (n≥3) is used to obtain a complete algebraic homotopy invariant for A n 4 -polyhedra with free homology (n≥3). As an application we compute the group of self-homotopy equivalences Aut(X) for a bouquet X=∨∑ℂP2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01168295
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  • 4
    Electronic Resource
    Electronic Resource
    Über die kosmische Häufigkeit des H2-Isotopes (1932)
    Springer
    Naturwissenschaften 20 (1932), S. 936-937 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01504707
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  • 5
    Electronic Resource
    Electronic Resource
    Irradiation modalities for photodynamic therapy (1989)
    Springer
    Lasers in medical science 4 (1989), S. 159-164 
    Details
    ISSN: 1435-604X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract For photodynamic therapy of tumors in hollow organs a homogeneous distribution of the applied laser light is desirable but often difficult to be achieved. Different irradiation modalities are compared in this paper. A method for homogenization of light using a layer of a highly backscattering medium deposited on the wall of the organ is described. The homogenization effect is studied theoretically for spherical and cylindrical hollow organs and, in part, compared with experimental results. An irradiation efficiency of more than 90% of the applied light dose is expected, i.e. losses can be reduced to 10% only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02276681
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Balmerserie des Wasserstoffs im Sonnenspektrum (1930)
    Springer
    The European physical journal 59 (1930), S. 353-377 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Mit Hilfe des Registrierphotometers kann die Balmerserie im Sonnenspektrum bis zur 14. Linie verfolgt werden. Bei den ersten Linien ist die Breite noch durch Strahlungsdämpfung mitbedingt, die höheren Serienglieder dagegen sind durch Druck- (Stark-) Effekt verbreitert. Mit Hilfe der quantentheoretisch berechneten Übergangswahrscheinlichkeiten läßt sich die Anzahl zweiquantiger Wasserstoff atome in der umkehrenden Schicht der Sonne ermitteln. Anschließend werden einige Bemerkungen über die Form der Linien mitgeteilt. Berechnet man unter der Annahme thermischen Gleichgewichts die Gesamtzahl der Wasserstoffatome in der Sonnenatmosphäre, so findet man, daß an der Basis dieser Atmosphäre ein Druck von ∼1 Atm. bestehen müßte. Dies ist mit anderen Beobachtungen nicht vereinbar. Es bestehen also in der Sonne Abweichungen vom thermischen Gleichgewicht, wie sie Adams und Russell in Sternen beobachtet haben. Diese werden näher diskutiert. Zum Schluß werden noch einige Beobachtungen der Wasserstofflinien im Spektrum der Chromosphäre, des Sonnenrandes und ruhender Protuberanzen mitgeteilt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01339909
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