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  • Articles  (97)
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  • Articles  (97)
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 77 (1908), S. 413-413 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE electrical theory of dispersion is based on the hypotheses (1) that electric waves are due to motions of electric charges, and waves of light in particular to vibrations of charges inside the atom; and (2) that these vibrations are governed by linear equations. On this basis we obtain the ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 75 (1907), S. 271-271 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR. STARK (NATURE, vol. lxxiii., pp. 78, 389, 533) has given a theory, based on his canal-ray experiments, according to which spectrum series are due to positive ions. It occurred to me that its applicability to thermal emission might be tested by experiments on the ionisation accompanying the ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 70 (1904), S. 176-176 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I DESIRE to express to Prof. Nagaoka my regret at my misinterpretation of his letter to NATURE of February 25, which was due simply to my failure to find any mention there of the larger system of which he speaks. No doubt his ring is quasi-stable if the central positive charge is large enough; ...
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  • 4
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— From the engineering point of view no reliable lifetime prediction method exists, which would enable the life expectancy of structures to be calculated with sufficient accuracy. One of the primary drawbacks of current approaches is their obvious inability to adequately include into an engineering calculation scheme basic knowledge of the microstructural response to cyclic loads during each of the stages of the fatigue process. This article gives a brief introduction into the Consecutive Wöhler Curve Approach which, it is suggested, is capable of predicting with enhanced accuracy fatigue life under varying amplitude conditions. The load interaction behaviour, which is intimately connected with the material's microstructure, is included through “fatigue functions” which are derived from two-step Wöhler tests.
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 112 (1923), S. 471-472 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE results of the eclipse expeditions of 1919 and 1922 leave little doubt that the deflexion of 1.75″ predicted by Einstein for a ray of light passing close by the sun is a fact. Moreover, as a result of the experiments of Lebedew and Poynting, it is admitted generally that such a ray ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 109 (1922), S. 106-106 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE object of this letter is to direct the attention of writers on Einstein's theory of gravitation to some recent experiments on the terrestrial aspects of gravitation which seem to have been overlooked, although they appear to be of great importance for the purpose of forming a just estimate ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 75 (1907), S. 461-461 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN NATURE of February 21, Prof. Wood, referring to my letter of January 17, says that the effects observed were probably due to disturbance of the density gradient of the sodium vapour caused by “local heating by the wire.” I am afraid that in my letter I cannot have described the experimental ...
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Fatigue Life Calculation on the Basis of Fatigue FunctionsSpecific two-step tests constitute the basis of the fatigue functions determination. They consider the fatigue state reached during preloading in the action on the following stress step. The fatigue functions control the sequence of the fatigue life calculation at multi-step and random loadings.
    Notes: Ausgewählte Zweistufenversuche bilden die Grundlage für die Aufstellung von Ermüdungsfunktionen. Sie berücksichtigen den während der schwingenden Vorbelastung erreichten Ermüdungszustand in seiner Auswirkung auf die nachfolgende Belastungsstufe. Die Ermüdungsfunktionen steuern den Ablauf der Berechnung der Lebensdauer bei Mehrstufen- und Randombelastungen.
    Additional Material: 8 Ill.
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  • 10
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Effects of Loading Sequences and Size of Repeated Stress Block of Loads on Fatigue Life Calculated using Fatigue FunctionsIt is well-known that collective form, stress intensity and loading sequence of individual stresses as well as size of repeated stress blocks can influence fatigue life, significantly. The basic variant of the consecutive Wöhler curve concept will permit these effects to be involved into fatigue life computation. The paper presented will demonstrate that fatigue life computations using fatigue functions reflect the loading sequence effect with multilevel loading precisely and provide reliable fatigue life data. Effects of size of repeated stress block and loading sequence on fatigue life as observed with block program tests can be reproduced using the new computation method.
    Notes: Man weiß, daß Kollektivform, Beanspruchungsintensität und Reihenfolge der einzelnen Beanspruchungen sowie der Umfang der periodischen Teilfolgen die Lebensdauer bei Blockprogrammversuchen signifikant beeinflussen können. Die Basisvariante des Folge-Wöhler-Kurven-Konzepts erlaubt die Einbeziehung dieser Einflüsse in die Lebensdauerberechnung. Im vorliegenden Beitrag wird gezeigt, daß die Lebensdauerberechnungen mit Ermüdungsfunktionen den Reihenfolge-Effekt bei Mehrstufenbelastungen richtig widerspiegeln und treffsichere Lebensdauerwerte liefern. Die bei Blockprogrammversuchen beobachteten Einflüsse von Teilfolgeumfang und Reihenfolge auf die Lebensdauer sind mit Hilfe des neuen Berechnungsverfahrens nachvollziehbar.
    Additional Material: 7 Ill.
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