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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 399-400 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A normal co-ordinate treatment has now been carried out for diacetylene by using the frequencies given by Jones4, without transferring any potential constant from similar molecules. Different sets of constants were obtained, corresponding to values of the C-H potential constant in a range close to ...
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 130 (1951), S. 392-402 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Arbeit behandelt die Verfärbung von MgO-Kristallen durch Überschuß der einen der beiden Komponenten und durch photochemische Dissoziationen. Die experimentellen Ergebnisse sind in § 7 zusammengefaßt.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 128 (1950), S. 409-413 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Untersuchung sollte experimentell feststellen, ob die Änderungen der Dichte von KCl-Einkristallen beim Einbau zweiwertiger Ionen mit den Vorstellungen vereinbar sind, die sich bei der Deutung der Störleitung und der Farbzentrendiffusion in KCl-Kristallen bewährt haben.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 4 (1953), S. 233-260 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Summary Based on the numerous publications dealing with feedback-control systems, the essential features of the phase-attenuation method most suitable for the design of regulators and servo-mechanisms are shown. Measures to increase stability, series and parallel compensation, influence of disturbances, transient behaviour and the effect of a finite time delay within the system are discussed. As an example, the fransfer function of a DC shunt motor is derived. The method is suitable for linear systems only, nonlinear systems may be analyzed by assuming small deviations from a steady state value.
    Notes: Résumé Se basant sur de nombreuses publications, on expose et on démontre les méthodes les mieux appropriées à l'analyse des problèmes de réglage. L'article traite les différents moyens pour améliorer la stabilité, l'influence de perturbations, les effets transitoires, les systèmes de réglage composés, l'influence d'une vitesse de propagation finie dans le système et la détermination de la fonction de transfert à l'exemple d'une moteur en dérivation. Les méthodes décrites ne sont valables que pour des systèmes linéaires. Des systèmes non linéaires peuvent aussi être étudiés par la même méthode, pour autant qu'il s'agisse de petites perturbations autour d'une position d'équilibre.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 4 (1953), S. 225-232 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 4 (1953), S. 57-81 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary The basic principles of vibration measurements and their applications are briefly discussed followed by the development of a new method. The essential features of a combination-seismograph and the operation of its several parts are outlined. A general seismometer equation is developed and applied to the study of various types of practicable seismometers. The theoretical concept of the construction of a precise seismograph is then worked out, and a description is given of its practical realization in the form of a precise combination-seismograph. A discussion of errors of the new method of measuring mechanical vibrations finishes the paper.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 29 (1954), S. 11-21 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In this paper a new direct method for calculating the wave velocityc(z) from the recorded travel-time-curves is developed. Further a comparison of the well-known average ofc(z) is made with the exact average. Finally a concrete example is given.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 23 (1952), S. 1-5 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Based on the recordings of the free oscillations of a seismometer, an approximate method is developed for calculating the non-linear terms of the corresponding indicator equation. An equivalent linear indicator equation is calculated with the results.
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 834-835 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The creeping trophic form consists of a thin body of colourless, uniformly granular protoplasm, branching and anastomosing, slowly and incessantly streaming, capable of division by plasmotomy, and of fusion with other individuals. Nuclei have not been observed. In tap water numerous minute ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 381-383 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MUSCLE research is indebted to Szent-Gyorgyi for two kinds of contractile model of muscle : the myosin thread and the muscle bundle extracted by glycerol and water, both contracting by adenosinetriphosphate. Models are more convincing the more closely they resemble the real thing ; they are also ...
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