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  • 1
    Electronic Resource
    Electronic Resource
    New spectral detection and elimination test algorithms of ECG and EOG artefacts in neonatal EEG recordings (1987)
    Springer
    Medical & biological engineering & computing 25 (1987), S. 127-130 
    Details
    ISSN: 1741-0444
    Keywords: Artefact detection ; ECG interference ; EOG interference ; Neonatal EEG ; Spectral parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract New methods for the detection of ECG and EOG artefacts in the EEG are introduced, which can also be used for the evaluation of the quality of the elimination procedure. These algorithms are based on the estimation of the power or coherence spectrum by means of FFT. The advantage of this method is that the EEG spectrum is monitored by the test algorithm. The spectrum will be plotted if no influence of the ECG and EOG can be found. On the other hand, if artefacts are detected the correction of the EEG time series will be carried out and the spectrum of the corrected EEG time series will be plotted after repeated monitoring by the test algorithm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442839
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Results of modelling and physiological examination of movement-related heart-rate reactions in neonates (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 599-604 
    Details
    ISSN: 1741-0444
    Keywords: Actogram ; Heart rate ; Movement ; Neonates ; Signal analysis ; Simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract It can be shown that the sequence of spontaneous movements in the active sleep of healthy neonates can be described as a Poisson process. This statistical model is the basis of the modelling of movement-related heart-rate reactions (MRHR) as a secondary process. Modelling these processes gives essential information about possible diagnostic parameters such as the mean frequency of classified movements in active sleep (AS), and characteristics of the course of MRHR. Optimisation of the reliability of interpreting power spectral parameters, analysis of longterm rhythms and designation of the physiological trends of neonatal heart rates can be attained if the results of time series analysis are compared with fitted simulations. Modifications and new techniques of data acquisition and processing are created by means of the computer model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447497
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    Paper (German National Licenses)
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  • 3
    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
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Stahlhohlprofile mit Wasserkühlung für den baulichen Brandschutz (1986)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 37 (1986), S. 333-336 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Water cooling of hollow steel sections in buildings in case of fireSupporting hollow steel sections in building constructions can be water cooled. In case of fire, the water cooling must guarantee the supporting function of the steel sections for a definite period of time. Possible corrosion reactions are discussed for the normal service as well as for the case of fire. The parameters of interest are outlined and explained in detail with respect to testing. Cases of application are presented, and the corrosion resistance of the systems is described.
    Notes: Tragende Stahlkonstruktionen für Bauten können aus Hohlprofilen mit Wasserkühlung hergestellt werden. Während eines möglichen Brandfalles muß die Wasserkühlung eine möglichst langdauernde Funktion der tragenden Stahlkonstruktion gewährleisten. Für den Betriebs-und Brandfall werden mögliche Korrosionsreaktionen diskutiert und gezeigt, welche Punkte im einzelnen zu beachten und zu prüfen sind. Anwendungsbeispiele werden dargestellt und die Korrosionsbeständigkeit der Systeme erläutert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19860370610
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    Paper (German National Licenses)
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