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  • 1975-1979  (3)
  • 1978  (3)
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  • 1975-1979  (3)
Year
  • 1
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 47 (1978), S. 207-222 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary To analyse thin shell structures curved mixed elements are developed and studied from a theorctical vantage point and through the medium of numerical exampels. The investigations show, that the accuracy of mixed shell elements is dependent first of all on the choice of integration variables, while the influence of the order of polynoms is less.
    Notes: Übersicht Zur Berechnung dünnwandiger Schalen wird ein Satz von gekrümmten Elementen mit Ansatzfreiwerten in gemischter Weg- und Kraftgrößendarstellung entwickelt und deren Brauchbarkeit an Hand einiger Beispiele überprüft. Die theoretischen und numerischen Untersuchungen zeigen, daß die Genauigkeit gemischter Elemente in erster Linie von der Auswahl geeigneter Integrationsvariabler abhängt, während die Ordnung der Polynomansätze die Approximationsgüte nur geringfügig beeinflußt.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0942-0940
    Keywords: Astrocytomas ; supratentorial ; oligodendrogliomas ; supratentorial ; recurrent gliomas ; reoperation ; radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary On the basis of our previous investigation regarding histological transformation of recurrent astrocytomas and oligodendrogliomas we report the clinical results of reoperations. The present observations deal with 121 cases: grade 1 astrocytomas (45), oligodendrogliomas (12), grade 2 astrocytomas (47), and oligodendrogliomas (17), respectively. In all these a second reoperation was performed in 14 cases. Operative mortality was relatively high, but without significant difference in the two groups of malignancy: 24.5% and 29.6%. Survival times in both groups showed striking individual differences. We achieved post-reoperation survivals exceeding one year in 18 and 14 cases, respectively. The results of second reoperations were generally poor. We find no remarkable differences in survival time following reoperations in primary grade 1 and grade 2 tumours. Similarly, malignant change proved to be not decisive for survival times. On the contrary, most of our patients with unchanged grade 1 astrocytomas, reoperated on after a longer interval, achieved a short second survival only. Prolongation of life expectancy by radiotherapy is doubtful. Irradiation seems to be necessary with malignantly transformed tumours if the patient did not have any treatment before reoperation.
    Type of Medium: Electronic Resource
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