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  • 1950-1954  (38)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 75 (1953), S. 5126-5127 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
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    Unknown
    Washington : Periodicals Archive Online (PAO)
    Middle East Journal. 5 (1951) 379 
    ISSN: 0026-3141
    Topics: Ethnic Sciences , History , Political Science , Sociology , Economics
    Notes: Book Reviews
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 3 (1950), S. 156-162 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Summary RecentlyC. G. Rossby has published two papers on the displacement of a solitary atmospheric vortex. Because of the variation of the Coriolisparameter with the latitude a displacement of the vortex takes place even if we assume that the vortex is originally symmetrical and embedded in resting air.C. G. Rossby was able to show that with these simplifications a displacement in a strict north-south direction has to occur. In the following article moreover the role of frictional forces is dealt with. Assuming a variation of the winddirection with height according to the Ekman spiral a deviation of the track of the vortex from the north-south direction to the right up to an angle of 20 degrees can be shown.
    Abstract: Résumé C. G. Rossby a publié récemment deux travaux sur le déplacement de cyclones isolés et occlus. Par suite de la variation du paramètre de Coriolis avec la latitude géographique, le cyclone se déplace même par symétrie complète et calme à l'extérieur.C. G. Rossby a pu, dans cette hypothèse, exprimer la grandeur de la force agissant sur le cyclone et a montré que le déplacement devait se faire dans une direction Nord-Sud. On a étudié dans le présent article le rôle des forces de frottement dans ce déplacement. En admettant une variation du vent avec l'altitude du type de la spirale d'Ekman, on trouve une déviation de la trajectoire vers la droite par rapport à la direction Nord-Sud, allant jusqu'à 20 degrés.
    Notes: Zusammenfassung In letzter Zeit hatC. G. Rossby zwei Arbeiten über die Verlagerung einzelner abgeschlossener Wirbel veröffentlicht. Wegen der Veränderlichkeit des Coriolisparameters mit der geographischen Breite findet eine Verlagerung des Wirbels auch bei vollständiger Symmetrie und bei ruhender Umgebung statt.C. G. Rossby konnte unter diesen Vereinfachungen einen Ausdruck für die Größe der auf den Wirbel wirkenden Kraft ableiten und zeigten, daß die Verlagerung in einer Nordsüdrichtung erfolgen müßte. Im nachfolgenden Artikel wird die Rolle der Reibungskräfte bei der Verlagerung untersucht. Unter der Annahme einer Windänderung mit der Höhe im Sinne der Ekmanspirale ergibt sich eine Abweichung der Bahn des Wirbels von der Nordsüdrichtung nach rechts bis zu einem Winkel von 20°.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 2 (1950), S. 345-366 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 6 (1954), S. 464-472 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 4 (1951), S. 122-141 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Summary A verification of the prognostic formula for predicting the height profile of the 500 mb pressure surface at a fixed latitude derived byCharney andEliassen shows that a practical application is limited at least for the period under consideration (January 1949). Only in case of relatively small perturbations and rather uniform current along the latitude circle the formula seems to be successful in day-to-day forecast procedures.
    Abstract: Résumé Une vérification portant sur le mois de janvier 1949 de la formule pronostique établie parCharney etEliassen et applicable aux variations de la surface de 500 mb. le long d'un parallèle géographique déterminé montre que son emploi dans la pratique de la prévision du temps est encore douteux. Ce n'est que dans le cas d'une composante zonale du vent à peu près uniforme et lors de petites perturbations correspondantes qu'une prévision calculée de la tendance de pression de l'onde supérieure de pression en un lieu déterminé semble possible.
    Notes: Zusammenfassung Eine Überprüfung der vonCharney undEliassen abgeleiteten Prognosenformel für Änderungen der 500 mb-Fläche entlang einer bestimmten geographischen Breite ergibt, daß in den untersuchten Fällen (Januar 1949) eine Verwendung im praktischen Wetterdienst noch fraglich ist. Nur bei verhältnismäßig einheitlicher zonaler Windkomponente und bei entsprechend kleinen Störungen scheint eine Vorausberechnung der Drucktendenz der „oberen” Druckwelle für einen bestimmten Ort mit Hilfe der Formel möglich zu sein.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 5 (1953), S. 490-504 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Protoplasma 42 (1953), S. 1-29 
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The cell physiologic investigations on the analysis of growth and morphogenesis of the prothallia ofDryopteris parasitica brought the following results: 1. Within a normally developed prothallium there are pronounced gradients. These gradients are to be regarded first of all as gradients of growth. For characterizing them the data for three special states of development given in table p. 27 may be used. 2. With prothallia grown under changed conditions of light reacting to this change with a form different from the normal one (Fig. 3), we could show that morphologically equivalent cell-filaments possess also cell physiologically equivalent gradients while morphologically unequivalent cell-filaments show also cell physiologically unequivalent gradients. 3. On the basis on the one hand of the described investigations and on the other hand of the results on growth in fern prothallia cited in the bibliography, the opinion is pointed out that in the process of morphogenesis there is a correlation between a cytologic and a histogenic tendency of development. A manifestation of the cytologic tendency of development is the formation of cellular gradients, while a manifestation of the histogenic tendency is to be regarded as the formation of the gradients within the whole prothallium.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 41 (1954), S. 530-531 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 2 (1951), S. 383-396 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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