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  • Articles  (2)
  • Data classification  (1)
  • Polymer and Materials Science  (1)
  • 1985-1989  (2)
  • 1965-1969
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 26 (1988), S. 282-288 
    ISSN: 1741-0444
    Keywords: Data classification ; Heart rate ; Long-term recordings ; Respiratory rate ; Time-series analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The paper describes a series of techniques for the analysis of long-term cardiorespiratory recordings from infants. The analysis performed is based on analysing the respiratory rate, respiratory-rate variability, heart rate and the heart-rate variability measured for nonoverlapping time epochs of approximately 100s duration throughout the recordings. Three descriptors of each of these four data series have been used. First, the mean value and standard deviation; secondly, the probability density function, which was then processed by a principal-components factor analysis to achieve data reduction and classification to make comparisons between different groups of infants; and finally, the power spectral density function. These techniques provide a comprehensive method for analysing long-term cardiorespiratory recordings which should greatly extend their value for both routine clinical use and for research purposes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 22 (1988), S. 623-631 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The formation and structure of zinc polyacrylate has been studied by Fourier transform infrared spectroscopy (FTIR). Using this technique we have shown that the fully hardened cement is bonded predominantly by zinc carboxylate complexes, rather than by associations of purely ionic character as had previously been supposed. Ionic bonds are formed in the initial stages of the reaction but are gradually converted to complex forms. This bond rearrangement appears partly responsible for physical changes that occur during gelation, setting, and hardening.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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