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  • 1
    ISSN: 1432-5217
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung Es wird das Problem betrachtet, kürzeste Wege in Graphen zu finden, bei denen die Kantenlängen zeitabhängig sind. Die hierfür bisher vorgeschlagenen Algorithmen sind nur anwendbar, wenn keine Einschränkungen für die Parkmöglichkeiten in den Knoten bestehen. Hier wird ein Algorithmus angegeben, der derartige Einschränkungen berücksichtigt. Einige mögliche Erweiterungen werden diskutiert.
    Notes: Summary Few algorithms have been proposed for the solution of the shortest route problem with time dependent lengths of edges. These algorithms are valid only under the assumption that parking in the nodes is unlimited and any desirable delay in departure time from a given node is permitted. This paper considers the case where such an assumption is not acceptable, and presents an efficient algorithm for the solution of the shortest route problem in networks with time dependent lengths of edges and parking regulations at the nodes. Some other possible extensions are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1912
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung 1. Mehrmalige Suprarenininjektionen rufen bei Kaninchen keine Bildung von Antikörpern hervor. 2. Nach intraperitonealen Injektionen von Meerschweinchennebennierenextrakt treten bei manchen Kaninchen Stoffe auf, welche vor den Einspritzungen nicht vorhanden waren und auf das Laewen-Trendelenburgsche Froschpräparat vasodilatatorisch wirken oder die Wirkung des Suprarenins hemmen, indem sie sich mit ihm auf unbekannte Weise verbinden. 3. Auf Grund der Versuchsergebnisse ist man zu der Annahme berechtigt, daß in den Nebennieren adrenalinähnliche Stoffe enthalten sind, welche im Gegensatz zu Adrenalin (bzw. Suprarenin) als Antigene dienen können.
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  • 3
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Stimulated Raman scattering is used to prepare ensembles of aligned acetylene molecules in thev 2=1 excited vibrational level. Decay and transfer of the alignment is followed by laser induced fluorescence. Measurements of the initially excited alignment agree well with theoretical calculations. The rate constants for decay decrease as the rotational quantum numberJ of the excited level increases.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Space science reviews 40 (1985), S. 195-200 
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a 6.3 hour observation of 4U1624-49 with the EXOSAT Medium Energy experiment. The X-ray light curve is dominated by a series of sharp dips in which the observed flux falls to ∼25% of the steady level on timescales of seconds. These dips are accompanied by strong variations in the spectral hardness consistent with large changes in the absorbing column density. No evidence is found for any dip periodicity, in contrast to the other four sources in which dip activity has been reported. We discuss the implications of these observations for models of low mass X-ray binaries.
    Type of Medium: Electronic Resource
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