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  • 1980-1984  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 23 (1982), S. 104-107 
    ISSN: 1432-0428
    Keywords: Platelet function ; diabetic microangiopathy ; aspirin effect on aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of aspirin in vitro and in vivo on platelet aggregation has been studied in 13 diabetic subjects without retinopathy, 16 diabetic subjects with retinopathy and 20 ageand sex-matched control subjects. The rate, degree and duration of collagen-induced aggregation were greater in the diabetic patients (p 〈 0.05;p 〈 0.01;p 〈 0.05). The residual aggregation in vivo was greater in all diabetic patients with aspirin, whilst it only occurred in vitro in patients without retinopathy. A decreased latent period was seen in diabetic patients, to a greater extent in those with retinopathy. Significant differences in the rate, degree and duration of arachidonic acid-induced-aggregation were also seen in patients with retinopathy treated with aspirin (p 〈 0.05;p 〈 0.01;p 〈 0.05). Disaggregation only occurred with aspirin in vitro and was more frequently seen in normal subjects.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of engineering mathematics 15 (1981), S. 185-200 
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Summary Variational principles for elliptic boundary-value problems as well as linear initial-value problems have been derived by various investigators. For initial-value problems Tonti and Reddy have used a convolution type of bilinear form of the functional for the time-like coordinate. This introduces a certain amount of directionality thereby reflecting the initial-value nature of the problem. In the present investigation the methods of Tonti and Reddy are used to derive the appropriate variational formulation for the transonic flow problem. A number of linear and non-linear examples have been investigated. As a test for the existence of directionality, finite-differences are used to discretize the variational integral. For initial-value problems of wave equation and diffusion equation type, fully implicit finite-difference approximations are recovered. The small-disturbance transonic equation leads to the Murman and Cole differencing theory; when applied to the full potential-flow equations, the rotated difference scheme due to Jameson is obtained.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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