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  • 1995-1999
  • 1985-1989  (2)
  • 1988  (2)
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Years
  • 1995-1999
  • 1985-1989  (2)
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  • 1
    ISSN: 1432-0584
    Keywords: Cytogenetic studies ; AML ; Prognostic value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between 1981 and 1986 cytogenetic studies of bone marrow and/or blood cells in 139 patients with de novo acute myeloid leukemia (AML) were performed. The overall incidence of chromosomal aberrations was 53%, and this was not significantly influenced by sex, age nor the FAB classification. The aberrations most often found were: complex anomalies (n=13), t(8; 21) (n=10), trisomy 8 (n=9), monosomy 7 (n=6), monosomy 5, 5q-, trisomy 11, 12p- (n=4) and trisomy 6, 11q-, inv [16] (n=3). The prognostic significance of chromosomal findings was evaluated in 112 patients treated by combination chemotherapy. The chromosomal status NN, AN, AA did neither significantly influence complete remission rate (NN: 68%, AN: 71%, AA: 60%) nor mean survival (NN: 24, AN: 26.6, AA: 35.6 months). On the other hand, certain types of chromosomal anomalies were of prognostic value. CR was obtained in all 10 patients with t(8; 21) but only in 2 out of 9 patients with complex aberrations. Median duration of CR in patients with t(8; 21) was significantly longer than in patients with a normal karyotype (30 vs 7 months).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 71 (1988), S. 187-198 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents For synchronous machines based on permanent magnet excitation and the transvers flux concept an analytical approach for field and force calculations is being described. One of the assumptions is a known trapezoidal wave form of the armature current, maintained by appropriate frequency inverter and terminal voltage. The analysis covers one and two-sided armature configurations as well as different configurations of the excitation (magnet) system of the rotor. Refinements of the analysis can be achieved by taking into account magnetic leakage components and saturation effects. Comparisons with the 3-dimensional FE-computation and with results from measurements are presented.
    Notes: Übersicht Ausgehend von der Transversalfluß-Anordnung des magnetischen Kreises wird für permanentmagneterregte Synchronmaschinen die Berechnungsmethode beschrieben. Hierbei ist vorausgesetzt, daß durch Wechselrichterspeisung die Stromform näherungsweise trapezförmig vorgegeben ist. Für ein- und zweiseitige Statoranordnungen sowie Erregersysteme in Flachmagnet- und Sammlerkonfiguration werden die mathematischen Beziehungen zwischen Feld- und Stromgrößen und den Abmessungsparametern angegeben. Es wird auf verschiedene Verfeinerungsstufen des Berechnungsverfahrens, etwa durch Berücksichtigung von Streuflußkomponenten und Sättigung des Eisenwegs, hingewiesen. Vergleiche mit der dreidimensionalen FE-Methode und mit Messungen an einem Modellmotor beschließen die Arbeit.
    Type of Medium: Electronic Resource
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