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  • 1990-1994
  • 1985-1989  (3)
  • 1989  (3)
  • 1
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Kinematics predicts the severe suppression of low-energy (〈1 GeV) secondary antiprotons in the Galactic cosmic rays. Thus the observation several years ago of a finite flux of low-energy antiprotons could not be explained with existing models of cosmic ray propagation, which led to a plethora of theoretical speculation. We have recently flown a balloon-borne instrument to measure the energy spectrum of cosmic-ray $$\bar p's$$ , and have found no antiprotons in the energy interval 200–640 MeV (corrected to the top of the atmosphere). This yields an upper limit to the $$\bar p/p$$ ratio of 5.5×10−5 (90% confidence level), well below and hence contradicting the earlier result.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 374 (1989), S. 95-98 
    ISSN: 1435-2451
    Keywords: Chronic, idiopathic, thrombocytopenic purpura ; Splenectomy ; Cortison-non-responder
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im Zeitraum von 1978 bis 1987 unterzogen sich 11 Männer und 16 Frauen mit einem Altersmedian von 35 Jahren (14 Jahre bis 85 Jahre) einer therapeutischen Splenektomie wegen chronisch-idiopathischer, thrombocytopenischer Purpura. Kein Patient verstarb postoperativ im Rahmen des stationären Aufenthaltes. 77,8 (21 Patienten) verblieben in einer dauerhaften Remission. Nur 6 Patienten - davon 4 Cortison-NonResponder - rezidivierten und benötigten weiterhin konservative Therapie.
    Notes: Summary In the period between 1978 to 1987 16 female and 11 male patients with a median age of 35 years (range: 14 years to 85 years) underwent splenectomy for ITP. There was no lethality in the postoperative period. 77.8% of all patients are in a complete remission, only 22.2% showed a recurrence and need further conservative therapy.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 20 (1989), S. 14-20 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Fretting Wear The characteristic feature of fretting wear compared with other types of wear lies in the intensive interactions between transfer of debris, mode of vibration and wear. In particular, the forms of wear are heavily dependent on the continued presence or removal of the resulting wear particles and on the accessibility to lubricants. The systematic treatment of the individual forms of wear facilitates the analysis in cases of damage. Despite the system dependence of wear, the methods of the test chain and of parameter variation makes it possible to achieve practical test results also with component and model tests. An example shows how the quality of tribologically stressed components can be systematically improved in this way.
    Notes: Das charakteristische Merkmal der Verschleißart Schwingungsverschleiß gegenüber anderen Verschleißarten ist die intensive Wechselwirkung zwischen Stofftransport, Schwingungsform und Verschleiß. Insbesondere die Verschleißerscheinungsformen werden stark vom Verbleib oder Abtransport der entstehenden Verschleißpartikel und den Schmierstoffzutrittmöglichkeiten beeinflußt. Eine systematische Behandlung der einzelnen Verschleißerscheinungsformen erleichtert die Analyse von Schadensfällen. Trotz der Systemabhängigkeit des Verschleißes bieten die Methoden der Prüfkette und der Variation der Parameter die Möglichkeit, auch mit Bauteil- und Modelltests praxisnahe Prüfergebnisse zu erzielen. In einem Beispiel wird gezeigt, wie man damit die Qualität tribologisch beanspruchter Bauteile systematisch erhöhen kann.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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