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  • 1995-1999  (2)
  • Gumbel  (1)
  • Nasopharyngeal bacterial interference  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Small Defects and Inhomogeneities in Fatigue Strength: Experiments, Models and Statistical Implications (1999)
    Springer
    Extremes 2 (1999), S. 123-147 
    Details
    ISSN: 1572-915X
    Keywords: Fatigue limit ; maximum defect ; projection area ; inclusion ; extremes ; Gumbel ; 62N05 ; 60D05
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The method explained in this paper for quantitative evaluation of fatigue limit for materials containing defects is based on the experimental evidences that inhomogeneities and micro-notches can be treated like cracks. First, the basic concept of the √area parameter model is explained introducing the various data obtained by the first author's group for over last 15 years. Evidences are shown that small cracks, defects and nonmetallic inclusions having the same value of the square root of projection area, √area, have the identical influence on the fatigue limit regardless of different stress concentration factors. Various applications of these concepts to various defect types and microstructural inhomogeneities are shown. Since the estimation of fatigue strength is related to the estimation of the size of maximum defects occurring in a piece, the methods for searching the defects and the quality control of materials with respect to inclusion or defect rating as well as their statistical implications are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009976418553
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The nasopharyngeal bacterial flora in children with otitis media with effusion (1996)
    Springer
    European archives of oto-rhino-laryngology and head & neck 253 (1996), S. 260-263 
    Details
    ISSN: 1434-4726
    Keywords: Otitis media with effusion ; Nasopharyngeal bacterial interference ; α-Streptococcus ; Children
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A study was undertaken to evaluate the incidence of nasopharyngeal α-streptococci with inhibitory activity against pathogens, as a defense mechanism of the normal bacterial flora against infection. Cultures were taken from the nasopharynges of 43 children with otitis media with effusion (OME). The detection rates of α-streptococci with inhibitory activity against Haemophilus influenzae, Streptococcus pneumoniae, Staphylococus aureus and group A streptococci were significantly lower in the nasopharynx than those isolated from the tonsils of the same patients. Moreover, the detection rates of α-streptococci with inhibitory activity against all of these pathogens derived from the nasopharynx were lower than those in healthy children, streptococcal strains with activity against H. influenzae and Strep. pneumoniae were also lower than that in patients with tonsillitis. These findings suggest that low nasopharyngeal levels of α-streptococci with inhibitory activity against respiratory pathogens may render children susceptible to OME. Further studies are needed to investigate the relationships between the prevalence of pathogens in the nasopharynx and the inhibitory activities of α-streptococci against them in order to devise and select optimal treatment for patients with OME.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00171139
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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