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  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen über das Verhalten des Verdauungssystems bei der Regeneration der Tricladen (1908)
    Springer
    Development genes and evolution 25 (1908), S. 523-568 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02161517
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  • 2
    Electronic Resource
    Electronic Resource
    Prospektive Analyse von Restitütionsvorgängen (1926)
    Springer
    Development genes and evolution 108 (1926), S. 646-679 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung Ein Rückblick auf die bisher betrachtete Phase der Restitution läßt deutlich erkennen, daß der verletzte Wurm jeweilen das unternimmt, was unter den geltenden Verhältnissen als das dringlichste erscheint: Solange die Wunde offen ist, strebt er nach Erreichung eines ersten Notverschlusses durch das mechanische Mittel desWundkrampfes. Dann folgt derchemische VerschluΒ durch Schleim, der ein Nachgeben des Krampfes, eine Entspannung ermöglicht. Endlich kommt der Wundverschluß durchdas syncytiale VerschluΒhäutchen zustande, das dann in der Folgezeit zumeigentlichen Epithel umgebaut wird. Gelingt der mechanische Wundverschluß nicht und kann wegen besonderer Umstände auch der Schleimverschluß nicht bewerkstelligt werden, so bildet sich eine Wundnekrose mit einer Demarkationslinie von platten Mesenchymzellen, die die Aufgabe des Integumentes Übernehmen und sich eng an das Epithel des Wundrandes anlegen. Während dieser Vorgänge am Wundende hat bereits die Mobilisation in den alten Geweben eingesetzt, die den Zweck hat, rasch möglichst zahlreiche Zellelemente in den Bereich der Wunde zu schaffen. Zuerst werden die der Wunde benachbarten Zellen mobilisiert, dann folgen die Übrigen Organe und zwar in einer bestimmten Reihenfolge; die zuletzt erschienenen zuerst, die in der postembryonalen Entwicklung früh auftretenden zuletzt. Voll ausdifferenzierte Elemente zerfallen oder degenerieren, werden an Ort und Stelle resorbiert oder nach dem Wundrand hin verlagert. Andere Zellen wandeln sich unmittelbar zu Regenerationszellen um, was einem Verjüngungsprozeß gleichkommt. Dabei können sie größere oder kleinere Partien ihres Plasmaleibes preisgeben. Sie werden dadurch klein und geschmeidig, können sich auch wieder teilen und sind durch die mehr und mehr hervortretende Spindelgestalt befähigt, zu „Wanderzellen“ zu werden. Die Wanderzellen sammeln sich dann in erstaunlich kurzer Zeit und in beträchtlicher Zahl im Regenerationspropf an. Ihr weiteres Schicksal mag in anderem Zusammenhang besprochen werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02080169
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  • 3
    Electronic Resource
    Electronic Resource
    Organisatorische Resultanten (1909)
    Springer
    Development genes and evolution 27 (1909), S. 21-28 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02161786
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  • 4
    Electronic Resource
    Electronic Resource
    Organisatorische Resultanten (1910)
    Springer
    Development genes and evolution 29 (1910), S. 169-174 
    Details
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02297070
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  • 5
    Electronic Resource
    Electronic Resource
    FE plane stress analysis incorporating arbitrary 3D large strain constitutive models (1997)
    Bradford : Emerald
    Engineering computations 14 (1997), S. 175-201 
    Details
    ISSN: 0264-4401
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Technology
    Notes: The objective of this work is to develop an element technology to recover the plane stress response without any plane stress specific modifications in the large strain regime. Therefore, the essential feature of the proposed element formulation is an interface to arbitrary three-dimensional constitutive laws. The easily implemented and computational cheap four-noded element is characterized by coarse mesh accuracy and the satisfaction of the plane stress constraint in a weak sense. A number of example problems involving arbitrary small and large strain constitutive models demonstrate the excellent performance of the concept pursued in this work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/02644409710166172
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  • 6
    Electronic Resource
    Electronic Resource
    Enhanced finite element formulation for geometrically linear fluid-saturated porous media (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Mechanics of Cohesive-frictional Materials 2 (1997), S. 185-203 
    Details
    ISSN: 1082-5010
    Keywords: fluid-saturated porous media ; enhanced element technology ; Engineering ; Civil and Mechanical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This contribution is concerned with a new mixed finite element formulation for geometrically linear Terzaghi-Biot type fluid-saturated porous media. To this end, an extended Hu-Washizu type mixed variational principle is presented for fluid-saturated porous continua. Then, a suitable discretization and its implementation are discussed, resulting in an improved element behaviour especially in numerical localization analyses. The intriguing element performance is firstly demonstrated for the case of localization within an elastoplastic compression problem. Finally, an elastoplastic slope stability problem is examined, whereby the new element formulation proves to render more pronounced failure modes as compared with a standard element expansion. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    An improved FE expansion for micropolar localization analysis (1994)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 10 (1994), S. 1005-1012 
    Details
    ISSN: 1069-8299
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A mixed variational principle is presented for the geometrically linear micropolar continuum. Then a suitable discretization and its implementation are discussed, resulting in an improved element behaviour for micropolar localization analysis. The intriguing element performance is demonstrated for the case of localization within a compression problem.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1640101206
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  • 8
    Electronic Resource
    Electronic Resource
    Theory and numerics of ductile micropolar elastoplastic damage (1995)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 38 (1995), S. 583-606 
    Details
    ISSN: 0029-5981
    Keywords: micro polar continuum ; FE-technology ; localization computations ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The aim of this work is to extend an isotropic elastoplastic damage concept for ductile materials within a generalized micropolar continuum framework. The underlying motivation is on the one hand to model softening behaviour by damage evolution and on the other hand to regularize the impending loss of ellipticity which results in strong mesh dependence of localization computations. To this end, the classical displacement field is supplemented by an independent rotation field to yield an enhanced continuum. For the model originally proposed by Lemaitre the damage evolution follows from a dissipation potential and the hypothesis of general associativity. Special emphasis is directed towards the numerical implementation of the constitutive model within the framework of finite element analysis of inelastic boundary value problems. To compare damage evolution and standard strain softening the results are contrasted to the outcome of an analysis with the micropolar version of the classical von Mises model. Thereby, the intriguing correspondence of strain softening and damage evolution is highlighted. Additionally, several planar micropolar finite element formulations are derived within mixed variational principles to enhance the poor performance of the standard bilinear displacement and rotation expansions used so far in the literature. The merits of these new element developments are demonstrated for the example of localization within a compression problem.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620380406
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  • 9
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    Optimal Design of Brittle Composite Materials: a Nonsmooth Approach (2012)
    Springer
    Details
    Publication Date: 2012-06-15
    Print ISSN: 0022-3239
    Electronic ISSN: 1573-2878
    Topics: Mathematics
    Published by Springer
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  • 10
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    Size effects of 109° domain walls in rhombohedral barium titanate single crystals—A molecular statics analysis (2016)
    American Institute of Physics
    Details
    Publication Date: 2016-01-14
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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