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  • 1
    facet.materialart.
    Unknown
    Nicht-lineare Elastizitätstheorie der Versetzungen und Eigenspannungen (1959)
    In:  Arch. Rational Mech. Anal., Amsterdam, Elsevier Science Publishers B.V., vol. 3, no. 1, pp. 97-119, pp. L07307, (ISSN: 1340-4202)
    Details
    Publication Date: 1959
    Keywords: Dislocation ; Elasticity theory of dislocations ; Elasticity ; Non-linear effects ; Kroner ; Kroener
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
    facet.materialart.
    Unknown
    Continuum theory of defects (1981)
    North Holland
    In:  Physics of Defects, Les Houches, Session XXXV, ed. by R. Balian, M. Kleman, and J.-P. Poirier, Amsterdam, North Holland, vol. C 560, 183 pp., no. PL-TR-91-2130, pp. 214-315, (ISBN 3-933346-037)
    Details
    Publication Date: 1981
    Keywords: Dislocation ; Elasticity theory of dislocations ; Elasticity ; Kroner ; Kroener
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
    Electronic Resource
    Electronic Resource
    Configurational and Material Forces in the Theory of Defects in Ordered Structures (1993)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 123-125 (Jan. 1993), p. 447-454 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.123-125.447.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Nonlinear Elasticity Theory of the Interaction between Two Parallel Screw Dislocations in an Isotropic Medium (1993)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 123-125 (Jan. 1993), p. 627-638 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.123-125.627.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    On the kinetics of polymeric networks with temporary junctions (1979)
    Springer
    Colloid & polymer science 257 (1979), S. 1033-1041 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract At sufficiently high concentrationc and temperatureT, the polymer molecules in solution form a “temporary” network, i.e. a network with junctions which can form and dissociate. Depending on the reaction rate of these processes the temporary network possesses additional mobility as compared with a rubber-like permanent network. In this paper the first-order reaction constantk 1 of the dissociation and the second-order reaction constantk 2 of the formation of a junction which both together determine the junction number (per unit volume)n(c, T) are expressed in terms of the Gibbs free energies of activationg*(c, T) of the two processes. Using the kinetic theory and results ofFlory, Hoeve, Ciferri andZiabicki g* is expressed in the basic molecular parameters. The so-obtained equilibrium number (per unit volume) of junctions is compared with numbers derived from osmotic pressure measurements ofHoffmann and birefringence measurements ofGill andToggenburger. Order of magnitude agreement is found. The above results are important for future investigations which aim at a quantitative description of the viscosity caused by the above-mentioned additional mobility
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01761114
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  • 6
    Electronic Resource
    Electronic Resource
    Statistical mechanics of temporary polymer networks I. The equilibrium theory (1984)
    Springer
    Rheologica acta 23 (1984), S. 1-9 
    Details
    ISSN: 1435-1528
    Keywords: Temporary polymer network ; distribution function ; relaxation time ; transition probability ; viscoelasticity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract In part I of this work (the present article) the equilibrium state of temporary polymer networks is treated in the framework of thermodynamics and statistical mechanics. The network is described as an open system. Thereby we use a modified spring-bead model in which the beads represent junctions that decay and reform thus adding a viscous component to the assumed elastic behaviour of the permanent network. The relevant statistical equation — analogous to Liouville's equation — is solved. The grand-canonical probability density function and two of three equations of state are derived. Explicit formulae are given for several relevant probabilities. For instance the probabilityw (z)dz that a network chain connecting two junctions has a contour length betweenz andz +dz is given by the Wien type formulaw(z) =A z 3 exp {−B z} whereA andB do not depend onz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333869
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  • 7
    Electronic Resource
    Electronic Resource
    Statistical mechanics of temporary polymer networks (1989)
    Springer
    Rheologica acta 28 (1989), S. 193-201 
    Details
    ISSN: 1435-1528
    Keywords: Temporarypolymernetwork ; statistical mechanics ; dynamical effect ; stress overshoot
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The statistical theory of temporary polymer networks developed in parts I and II of this work is closed by a discussion on dynamical effects, including comparison with experiments. After a short review of the theory developed in parts I and II we discuss the situation in which a prescribed velocity gradient is imposed on the physical system formed by the temporary network and the solvent. The dynamical equation for the 2nd moments (derived from a generalized bead-spring model) contains the configuration-dependent transition probability, which depends on the second moments in a complex way. An approximate solution of these equations is obtained from a computer program. It shows the experimentally observed behavior, in particular the stress overshoot maximum after a sudden start of the flow. The derivation of the above equations contains simplifying assumptions which, however, leave the essential physics intact. The most important assumptions concern the relaxation time approach and the decay and formation processes. These were supposed to be dilute enough to break up the many-junction processes into one-junction processes. Both assumptions are analogous to frequently used assumptions in Boltzmann's kinetic theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332851
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  • 8
    Electronic Resource
    Electronic Resource
    Über den Spin in der allgemeinen Relativitätstheorie: Eine notwendige Erweiterung der Einsteinschen Feldgleichungen (1965)
    Springer
    The European physical journal 187 (1965), S. 478-489 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this article the problem ofgeometrizing spin-angular momentum is treated. First we emphasize the far-reaching analogy between General Relativity and the differential geometric version of the field theory ofdislocations. Starting from this, we obtain inter alia the result that spinning matter cannot be imbedded in a four-dimensional Riemannian space, but that one needs a geometry with a non-symmetric affine connexion. From a correspondingvariational principle we then deduce field equations, which are a straightforward generalisation ofEinstein's equations of 1916.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332524
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  • 9
    Electronic Resource
    Electronic Resource
    On the metabolism of prostaglandins by rat brain homogenate (1976)
    Springer
    Cellular and molecular life sciences 32 (1976), S. 1114-1115 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using radio-immuno assays for prostaglandins and prostaglandin metabolites, three prostaglandin metabolizing enzymes were found in the 100,000×g supernatant of rat brain, 15-hydroxy-prostaglandin-dehydrogenase,Δ 13 and prostaglandin E-9-keto-reductase. Specific activity of the latter enzyme was highest in striatum and midbrain and lowest in cortex, cerebellum and spinal cord.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01927575
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Behandlung des quantenmechanischen Vielteilchenproblems mit Hilfe von Mehrteilchenfunktionen (1960)
    Springer
    The European physical journal 160 (1960), S. 297-309 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Boppsche Zweiteilchenbehandlung des quantenmechanischen Vielteilchenproblems wird zu einer Mehrteilchenmethode verallgemeinert. Probleme mitN Teilchen lassen sich näherungsweise auf solche mitL Teilchen zurückführen (2≦L〈N). Die Näherung wird im allgemeinen um so besser, je größer das VerhältnisL/N ist. Als Beispiel wird gezeigt, daß die Zustände desN-Elektronenatoms näherungsweise aus denen des (N−1)-Elektronenatoms folgen. Entnimmt man die letzteren Zustände dem Experiment, so kann man die Methode testen. Ausreichende Tabellenwerte findet man bis zum Phosphor (15 Elektronen). Der z. B. danach halbtheoretisch berechnete Grundzustand desP- Atoms stimmt auf 1‰ mit dem experimentellen Wert überein. Dies kann als Beweis für die Brauchbarkeit der Methode, wie auch als experimentelle Bestätigung der (unrelativistischen) Mehrelektronen-Schrödinger-Gleichung angesehen werden. Die Anwendung der Methode auf Molekül- und Kristallprobleme, eventuell auch auf Kernprobleme, erscheint möglich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01349366
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