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  • 1
    ISSN: 1432-1076
    Keywords: Key words Longitudinal studies ; Growth ; Infant ; Short-term measurement ; Clinical practice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A longitudinal growth study with monthly measurements during the 1st year of life was conducted by nine paediatricians working in private practice in Zurich. Of 92 children, none was lost to the study and only 32 of 1104 planned visits were missed; the quality of the measurements was comparable to that of a specialised university clinic. Compared to the Zurich Longitudinal Growth Studies, children of this study were considerably heavier and taller. In 92% of the subjects, growth velocity was at least once outside the reference range (3rd–97th percentile). For weight increments, the corresponding proportion was 87%. Conclusions The data indicate that current standards for the 1st year of life for the Zurich area might no longer be appropriate and need to be updated. The currently used velocity percentiles based on 3-monthly measurements are not suitable to assess individual height and weight increments calculated from monthly measurements.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of low temperature physics 93 (1993), S. 703-708 
    ISSN: 1573-7357
    Keywords: 76.30K ; 29.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present measurements of the temperature dependent signal rise time τS and discuss a model for calculating τS(T). The bolometer consists of a paramagnetic sample and an absorber. The lattice is heated up by absorbing α - particles, and the relaxation of the magnetization is measured with a SQUID. With decreasing temperatures τS first increases as τ1∼1/T, but then decreases strongly. At 30 mK it is reduced by orders of magnitude compared with τ1. This result is in agreement with a theoretical model which takes into account the heat capacities of the lattice, the resonant phonons, the spins, and thermal resistances between these capacities. Under the condition of the bottleneck effect τS is found to be proportional to T3. At low temperatures the lowest values of τS of 2 ms may already be limited by the Kapitza resistance. These are the first measurements of the spin-lattice relaxation times with the energy being transferred from the lattice to the spins.
    Type of Medium: Electronic Resource
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