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  • 1
    Electronic Resource
    Electronic Resource
    Continuous spectral measurements of the optical absorption of glasses over the visible and near-infrared wavelength ranges (1974)
    Springer
    Applied physics 4 (1974), S. 109-113 
    Details
    ISSN: 1432-0630
    Keywords: Continuous light absorption ; Bulk glass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A calorimetric method for continuous measurements of the optical absorption of bulk glasses over the spectrum extending from the visible to the near-infrared wavelength ranges is presented. A relation between the absorption and the induced temperature rise of the sample, at thermal equilibrium, is derived. Details for the most convenient arrangement of source, lens and monochromator are given. As an example, experimental results are plotted for a F2 glass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00884265
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Better quantification of neonatal respiratory sinus arrhythmia—progress by modelling and model-related physiological examinations (1989)
    Springer
    Medical & biological engineering & computing 27 (1989), S. 298-306 
    Details
    ISSN: 1741-0444
    Keywords: Coherence analysis ; Computer simulation ; Neonatal heart rate ; Respiratory sinus arrhythmia ; Signal processing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A large interindividual variability of parameters quantifying respiratory sinus arrhythmia were found in a well defined group of healthy neonates during constant conditions of examination. Reasons for this can be found by means of a mathematical model which is based on physiological data. The results indicate sharp inconsistencies in the transfer function between respiratory movements and resulting respiratory sinus arrhythmia and are dependent on a relative frequency unit fN (ratio of mean respiration rate to mean heart rate). The values of the coherence (as a function of this relative frequency unit) between respiratory movements and heart rate are also distinguished by a systematic decrease from lower to higher fN values (fN=0·1–0·5) and inconsistencies in modelling as well as in physiological examinations. The reasons for both effects can be demonstrated. The study is the basis of a new qualitative step of quantification of respiratory sinus arrhythmia in neonates by power spectral and coherence analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441489
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Use of discrete Hilbert transformation for automatic spike mapping: A methodological investigation (1991)
    Springer
    Medical & biological engineering & computing 29 (1991), S. 242-248 
    Details
    ISSN: 1741-0444
    Keywords: Discrete Hilbert transform ; EEG ; Fast Fourier transform ; Spike mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract On the basis of discrete Hilbert transform (DHT) realised by fast Fourier transform (FFT), a new strategy for automatic spike mapping is introduced. The further computation of the EEG time series after DHT results in the time series of the momentary power and the momentary frequency. Both are used for the solution of the main requirements of automatic spike mapping. The spike-mapping concept introduced meets the requirements of efficient automatic spike detection and also has an insensitivity with regard to EMG interference and transient signal components, a frequent cause of false positive detections. Additionally, there are advantages if the momentary power of the spike is mapped instead of the spike potential. the use of momentary power makes a combination of power spectral mapping and spikemapping strategies possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02446705
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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