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  • 1985-1989
  • 1980-1984  (4)
  • 1965-1969  (2)
  • 1980  (4)
  • 1968  (2)
Material
Years
  • 1985-1989
  • 1980-1984  (4)
  • 1965-1969  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 87 (1980), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In 80 patients, multiple measurements of the fetal biparietal diameter were made during one examination using a real-time scanner equipped with a coded cephalometer. From the sets of data, the means and standard deviations for the group of 80 patients were calculated. In 80 per cent of cases, the individual standard deviations of the results were less than or equal to the estimated standard deviation of the group as a whole. The variability of measurement related to biparietal diameter was least in the range 59 to 83 mm. Comparison of the results obtained with the coded device and others obtained ‘blind’ does not reveal any significant advantage for the coded device.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 7 (1968), S. 875-881 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Surveys in geophysics 4 (1980), S. 43-55 
    ISSN: 1573-0956
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Magnetotelluric soundings show that the conductivity increases in the asthenosphere. The depth of this conductivity zone decreases with an increase of the surface heat flow, i.e. in such cases the lithospheric plate is thinner. The depth of the velocity decrease of seismic shear wave (S waves) shows the same connection with the surface heat flow. The solidus of a mixed-volatile medium intersects the temperature curves belonging to different surface heat flows at depths where the conductivity increase and the velocity decrease appear. These connections point to partial melting in the asthenosphere, which can decrease the viscosity too, and help the movement of the lithospheric plates according to the ideas of global tectonics. The melt fraction of peridotite and pyrolite determined by Shankland and Waff from the effective conductivity of the asthenosphere is about 3–4% at 30 kbar and ato *=0.1 S m−1. In the upper mantle of old shields it is likely that there is no well-developed asthenosphere due to the low temperature. Over these so-called ‘viscous anchors’ the lithospheric plates do not move. It is supposed that the conductivity increases observed below crystalline shields at a depth of about 300 km indicate the phase transition of rocks. Thus in these areas the surface of the phase transition can be at a higher position than in the younger tectonic units.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 36 (1980), S. 586-587 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The kallikrein-kininogens-kinins system has been investigated in the brown Norway rat. In this breed the stores of kininogens in the plasma are reduced and the plasma kallikrein-like activity appears to be absent both in vivo and in vitro.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Biological cybernetics 5 (1968), S. 103-109 
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Zusammenfassung Die in diesem Artikel beschriebenen mathematischen Modelle geben eine allgemeine exakte Behandlung des Verhaltens einfacher Netze, die in den Abschnitten 3.1.1–3.1.8. des Teiles I eingeführt wurden. Gerichtete Graphen werden studiert, deren Kanten hemmend wirken und deren Punkte durch eine ständige „Hintergrundwirkung” angeregt sind, wobei die Stimulation einen linearen Anstieg des Erregungswertes hervorruft. Die Graphen enthalten keine Schlingen und kein Paar übereinstimmend gerichteter paralleler Kanten. Eine weitere Beschränkung der Struktur der Graphen wird nicht gefordert. Im Gegenteil, es ist eine wesentliche Annahme, daß der Reiz auf jeden Punkt in genau derselben Weise wirkt. — Das im Abschnitt 3 konzipierte Modell beschreibt, wie ein Graph von einem gegebenen Anfangszustand aus funktioniert. Die Zeitpunkte T′ 0(=0), T′ 1, T′ 2,..., die den Beginn einer oder mehreren Hemmungsphasen bezeichnen, heißen Sprungmomente. Sind die Erregungswerte im Sprungmoment T′ k bekannt, so definieren wir das folgende Sprungmoment T′ k +1, ferner bestimmen wir durch die Formeln (3.1) und (3.2) die Erregungswerte, die den Punkten zwischen den Zeitpunkten T′ k und T′ k +1 zugeordnet werden. — Im Abschnitt 4 wird ein anderes mathematisches Modell eingeführt. Die virtuellen Sprungmomente T 0(=0), T 1 T 2,... werden in der Formel (4.1) definiert, die Matrix (4.2) enthält alle die zu diesen Zeitpunkten möglichen Werte. Die Formeln (4.6)–(4.10) beschreiben, wie die Mengen der Punkte, die die verschiedenen Werte haben, von T m zu T m+1 sich verändern. Feststellung 8 behauptet, daß das im Abschnitt 4 enthaltene Modell die wesentlichen Aspekte des Vorganges ausdrückt, der durch das im Abschnitt 3 ausgearbeitete Modell formuliert worden ist.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Periodica mathematica Hungarica 11 (1980), S. 87-87 
    ISSN: 1588-2829
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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