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  • 1
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 7278-7292 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The deposition parameter space has been extensively explored using the hot wire technique with 1% SiH4 in He as a source gas. To achieve reasonable deposition rates despite the high dilution, the filament was positioned at 1–2 cm from the substrate. This short distance introduced a large nonuniformity across the substrate in deposition rate as well as in film properties. These spatial variations were used to analyze which factors in the deposition determine film quality. Radiation from the filament as well as deposition rate cannot explain the large variation in film properties, leaving gas-phase reactions of Si and H from the hot filament as the primary cause. It is clear that radicals evaporated from the filament must undergo gas-phase reactions with SiH4 before deposition in order to produce high-quality material. Thus, conditions such as increasing the chamber pressure or going to a heavier carrier gas increase the fraction of radicals that can react before reaching the substrate and, therefore, improve the film quality. However, such conditions also enhance multiple radical reactions before such radicals reach the substrate and this can have a negative effect on film quality: this is attributed to gas-phase nucleation with incorporation of conglomerates. The gas-phase chemistry is quite different from that of plasma-enhanced decomposition in that no disilane or trisilane is formed in significant quantities. This, and the dependence on pressure, indicates that the pathway for formation of these heavier particles is radical–radical reactions. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Psychology 43 (1992), S. 87-131 
    ISSN: 0066-4308
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Psychologie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Cambridge : Cambridge University Press
    New Testament studies 25 (1979), S. 370-383 
    ISSN: 0028-6885
    Quelle: Cambridge Journals Digital Archives
    Thema: Theologie und Religionswissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1279-8517
    Schlagwort(e): Popliteal artery ; Topographic anatomy ; Flexion of the knee
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Résumé Les auteurs étudient, à partir de données exclusivement radiologiques, les modifications de l'axe artériel poplité au cours de la flexion du genou. Ils constatent l'apparition de flexuosités très marquées au niveau de la poplitée haute, alors que la poplitée basse décrit une courbe harmonieuse, dans le plan sagittal. Ces modifications se font entre deux points fixes: un point fixe crânial, représenté par la naissance de l'artère descendante du genou, et un point fixe caudal représenté par la naissance de l'artère tibiale antérieure. L'importance de ces modifications du trajet artériel ne doit pas être sous-estimée en pathologie lors des revascularisations artérielles prothétiques.
    Notizen: Summary The authors have studied, on the basis of purely radiologic data, the modifications of the popliteal arterial axis during flexion of the knee. They note the appearance in the sagittal plane of very marked flexures of the upper part of the artery, while the lower part describes a harmonious curve. These modifications take place between two fixed points: a cranial fixed point, represented by the origin of the descending artery of the knee, and a caudal fixed point represented by the origin of the anterior tibial artery. The pathologic importance of these modifications of the course of the artery should not be underestimated when obtaining revascularization by means of an arterial prosthesis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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