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  • Articles: DFG German National Licenses  (2)
  • Colour-coded sonography  (1)
  • Engineering General  (1)
  • 1
    ISSN: 1432-1084
    Keywords: Colour-coded sonography ; Parenchymal scars ; Percutaneous nephrolithotomy (PCNL) ; Sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined 50 asymptomatic patients 6–60 months after percutaneous nephrolithotomy (PCNL) by high-resolution sonography and additional colour-coded sonography and compared our results with the preoperative sonograms and the operative records. No lesions of larger vessels were detected, either arteriovenous fistulate or pseudoaneurysms. Avascular band-shaped hyperechoic parenchymal stripes were found in 17 of 50 patients (35%). As these did not appear in the preoperative sonograms, and as the stripes were in the same orientation as the neprrostomy canal, we believe them to be scar tissue.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 515-529 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A new element stiffness matrix is derived for straight cable elements subjected to tension and torsion. The cross-section of a cable, which may consist of many different structural components, is treated in the following as a single composite element. The derivation is quite general; consequently, the results can be used for a broad category of cable configurations. Individual helical armourning wires, for instance, may have unique geometric and material properties. In addition, no limit is placed on the number of wire layers. Furthermore, compressibility of the central core element can also be considered. The equations of equilibrium are first derived to include ‘internal’ geometric non-linearties produced by large deformations (axial elongation and rotatioin) of a straight cable element. These equations are then linearized in a consistent manner to give a liner stiffness matrix. Linear elasticity is assumed throughout. Excellent agreement with experimental results for two different cables validates the correctness of the analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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