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  • Digitale Medien  (3)
  • unstructured mesh generation  (2)
  • Cell death  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Pattern formation in a ts-cell-lethal mutant ofDrosophila: The range of phenotypes induced by larval heat treatments (1977)
    Springer
    Development genes and evolution 183 (1977), S. 41-59 
    Details
    ISSN: 1432-041X
    Schlagwort(e): Imaginal discs ; Pattern formation ; Cell death ; Duplication
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary We describe the range of phenotypes caused by cell death when larvae of the heat-sensitive cell-lethal mutant,l(1)ts726 ofDrosophila, are subjected to heat treatment at different stages of development. When the treatment extends into the pupal period, certain bristles fail to develop but the disc derivatives are otherwise normal. Earlier treatments cause the replacement of sets of leg and eye-antennal markers by mirror image duplications of neighbouring sets. The results are compared in detail with those expected under a gradient model proposed earlier to account for the phenotype. It is found that although the results for the second leg are in excellent agreement with the predictions of the model, a more elaborate hypothesis is necessary to account for the eye-antennal disc data. Abnormal head patterns fall into several distinct categories, any one of which could be explained by postulating the existence of a gradient, if other categories did not also occur. The markers affected in each case belong to overlapping sets, and each category of pattern can be induced by heat treatments administered throughout the temperature-sensitive period. The statistical distribution of the data is such that only one category of pattern would be detected in a small scale experiment. The possible implications relative to pattern formation in normal development are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00849033
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  • 2
    Digitale Medien
    Digitale Medien
    Mesh generation and adaptivity for the solution of compressible viscous high speed flowsBased upon papers originally presented at the 11th AIAA Computational Fluid Dynamics Conference, 6-9 July 1993, Orlando, Florida, U.S.A. and at the Royal Aeronautical Society European Forum on Recent Developments and Applications in Aeronautical CFD, 1-3 September 1993, Bristol. U.K. (1995)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 38 (1995), S. 1123-1148 
    Details
    ISSN: 0029-5981
    Schlagwort(e): line relaxation ; unstructured mesh generation ; adaptivity ; compressible Navier-Stokes equations ; Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: An implicit-explicit procedure for the solution of the compressible Navier-Stokes equations on unstructured triangular and tetrahedral meshes is outlined. A procedure for constructing continuous lines, made up of edges in the mesh, is employed and the implicit equation system is solved via line relaxation. The problem of generating, and adapting, unstructured meshes for viscous flow simulations is addressed. A number of examples are included which demonstrate the numerical performance of the proposed procedures.
    Zusätzliches Material: 26 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/nme.1620380704
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  • 3
    Digitale Medien
    Digitale Medien
    UNSTRUCTURED TETRAHEDRAL MESH GENERATION FOR THREE-DIMENSIONAL VISCOUS FLOWS (1996)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 39 (1996), S. 549-567 
    Details
    ISSN: 0029-5981
    Schlagwort(e): unstructured mesh generation ; viscous compressible flows ; Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Mathematik , Technik allgemein
    Notizen: A method of generating general tetrahedral meshes suitable for use in viscous flow simulations is proposed. The approach which is followed consists of the initial generation of a number of unstructured layers of highly stretched elements, in the vicinity of solid walls, followed by the discretisation of the remainder of the domain, by a standard advancing front procedure. The numerical performance of the proposed methodology is demonstrated by the generation of meshes suitable for viscous flow analysis over a number of three-dimensional aerodynamic configurations of current practical interest.
    Zusätzliches Material: 18 Ill.
    Materialart: Digitale Medien
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