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  • 1
    Electronic Resource
    Electronic Resource
    X-ray topographic dislocation contrast visible in reflections orthogonal to the Burgers vectors of axial screw dislocations in hexagonal silicon carbide (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 34 (2001), S. 20-26 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Contrast is associated with micropipes in X-ray topographs of SiC crystals obtained with prismatic reflections, representing an apparent violation of the g·b = 0 invisibility criterion. This is explained as a population of basal-plane dislocations with Burgers vectors of the set b = {\textstyle{1 \over 3}}〈11{\bar{2}}0〉 that occur in a high density within a few micrometers of the micropipes, below the resolution of X-ray topography. These basal-plane dislocations could be observed under an electron microscope. The presence of the surfaces of the micropipes influences the dislocation images in the topographs taken with prismatic reflections, often resulting in a band of light contrast along the axes of the micropipes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889800017027
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  • 2
    Electronic Resource
    Electronic Resource
    Three-Dimensional Stress and Strain in Passive Rabbit Left Ventricle: A Model Study (2000)
    Springer
    Annals of biomedical engineering 28 (2000), S. 781-792 
    Details
    ISSN: 1573-9686
    Keywords: Ventricular mechanics ; Scalable parallel computation ; Finite element analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract To determine regional stress and strain distributions in rabbit ventricular myocardium, an anatomically detailed finite element model was used to solve the equations of stress equilibrium during passive filling of the left ventricle. Computations were conducted on a scalable parallel processing computer and performance was found to scale well with the number of processors used, so that stimulations previously requiring approximately 60 min were completed in just over 5 min. Epicardial strains from the model analysis showed good agreement (RMSE=0.007332) with experimental measurements when material properties were chosen such that cross fiber strain was more heterogeneous than fiber strain, which is also consistent with experimental observations in other species. © 2000 Biomedical Engineering Society. PAC00: 8719Hh, 8719Rr, 8710+e
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1114/1.1289469
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