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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 61 (1995), S. 377-380 
    ISSN: 1432-0630
    Schlagwort(e): 68.35 ; 68.45 ; 85.30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The capacitance and voltage characteristics of field effect transistors passivated by BaF2-B2O3-GeO2-SiO2 glasses with various water contents were investigated. As the OH absorption coefficients of the glass increased, adverse effects on the recovery of hysteresisC-V curve shifts was seen. The water content is related to the fluoride content of the BaF2−B2O3−GeO2−SiO2 glass. The viscous flow point of the glass was lowered with increasing ionic character obtained from Hannay's equation. The source-drain current and voltage (I-V) characteristics of typical enhancement and depletion mode field effect transistors passivated with these glasses were investigated.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 62 (1996), S. 61-63 
    ISSN: 1432-0630
    Schlagwort(e): 68.35 ; 68.45 ; 85.30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The capacitance and voltage (C-V) characteristics of Metal-Oxide-silicon (MOS) capacitors passivated by CaF2B2O3-GeO2-SiO2 glasses with OH− ions, water and fluoride contents were investigated. As the OH− absorption coefficients of the glass increased, adverse effects on the recovery of hysteresis C-V curve shifts was observed. The content of OH− ions is closely related to the fluoride content in the CaF2 B2O3-GeO2-SiO2 glass. The viscous-flow point of the glass was lowered with increasing degree of ionic character obtained from Hannay's equation.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Applied physics 62 (1996), S. 313-315 
    ISSN: 1432-0630
    Schlagwort(e): 68.35 ; 68.45 ; 85.30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The capacitance and voltage (C-V) characteristics of metal, oxide, and semiconductors (MOS) capacitors passivated by SrF2-B2O3-GeO2-SiO2 glasses with various water and fluoride contents were investigated. As the OH− absorption coefficient of a glass increased, adverse effects on the recovery of shifts of the hysteresisC-V curve have been observed. The water content of ions is closely related to the fluoride content in the SrF2-B2O3-GeO2-SiO2 glass. The viscous-flow transition point of glass was lowered with increasing degree of ionic character obtained from Hannay's equation.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1432-1459
    Schlagwort(e): Alzheimer's disease ; Computed tomography ; Cerebral atrophy ; Parenchymal density
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Seventeen patients with clinically diagnosed Alzheimer's disease and 13 healthy age-matched controls were studied by means of computed tomography (CT). To assess cerebral atrophy, regional volumetric measurements and parenchymal density measurements were performed. The results indicate that: (1) Alzheimer patients show diffuse cerebral atrophy in the early stage; (2) the evaluation of lobar atrophy by means of CT is useful for the clinical diagnosis of Alzheimer's disease; (3) the evaluation of parenchymal density by means of CT is not as sensitive as the evaluation of lobar atrophy.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    ISSN: 1432-1459
    Schlagwort(e): Joseph disease ; Computed tomography ; Morphometric study ; Brain-stem atrophy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Eight Japanese patients with Joseph disease were studied using computed tomography (CT). Morphometric analysis using the two-dimensional (area) measurement by CT was performed in the infratentorial region. The brain-stem index, an index of brain-stem atrophy or pontine atrophy, revealed a significant decrease (P〈0.01), with a mean of 66.7% when compared with 16 control subjects. The patients showed a significant increase (P〈0.01), with a mean of three times that of the controls in the fourth ventricular index, an index of fourth ventricular dilatation. There were no differences in the cerebellar index, an index of cerebellar atrophy, between these patients and the controls, although the patients had an increased number of visible cerebellar vermian (2.0, SD 0.7) and hemispheric sulci (2.6, SD 0.6) as compared with the controls (vermian sulci: 0.4, SD 0.7; hemispheric sulci: 0). These data indicate severe pontine atrophy, fourth ventricular dilatation with mild involvement of the cerebellum and correlate well with the common pathological features of Joseph disease. The present morphometric evaluation by CT may be useful in the clinical diagnosis of Joseph disease.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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