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  • 1
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    Springer
    In:  Bull., Polar Proj. OP-O3A4, Proceedings 7.Aachener Symp. für Signaltheorie, Berlin, Springer, vol. 20, no. 4, pp. 47-65, (ISBN 0080419208)
    Publication Date: 1990
    Keywords: Stacking ; seismic Migration ; seismic Migration ; Seismics (controlled source seismology) ; Data analysis / ~ processing
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 66 (1983), S. 195-199 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The thermal response of a power-dissipating semiconductor is a function of the device itself and its mounting assembly. All components together build a combined thermal conductor, which often has a complex geometrical form. — The theory of the characteristics of thermal conductors is available, but in this cases results are too generalized to bee of much use for predicting realistic junction-temperatures. — This paper describes a new method for the determination of the parameters of components of a combined thermal conductor on the base of measured datapoints.
    Notes: Übersicht Die Wärmebelastung eines Halbleiters ist bei bekannter Verlustleistung eine Funktion der thermischen Eigenschaften des Bauelementes selber und seiner Montageeinrichtung. Insgesamt stellen diese Komponenten einen zusammengesetzten Wärmeleiter dar, der meist schwierige geometrische Formen aufweist. — Prinzipiell ist die Berechnung der Temperatur aus den für den Wärmetransport relevanten physikalischen Parametern möglich, jedoch haben solche Ansätze zu ungenauen Ergebnissen geführt. — Diese Arbeit beschreibt eine neue Methode zur Berechnung der Parameter für Komponenten von zusammengesetzten Wärmeleitern auf der Grundlage von Meßergebnissen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 7 (1986), S. 1007-1021 
    ISSN: 1572-9567
    Keywords: dilute gas ; mixtures ; pair potentials ; statistical mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The three-parameter MSK potential is used to calculate the dilute-gas properties of the monatomic gases and their mixtures. The parameters are fitted to data of the second virial coefficient and the Joule-Thomson coefficient; the calculations of all other thermophysical properties are predictions. For mixtures, universal combination rules for the potential parameters are used. It is shown that a consistent representation of the gas data of the monatomic systems is possible.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 7 (1986), S. 1135-1145 
    ISSN: 1572-9567
    Keywords: dilute-gas properties ; mixtures ; pair potentials ; statistical mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A three-parameter angle-dependent pair potential referred to as the SSR-MPA is used to correlate and extrapolate the dilute-gas properties of the simple linear molecules nitrogen, oxygen, and ethane. The statistical mechanical equations are solved by direct numerical integrations. When the shape of the molecules and the anisotropic long-range forces are properly accounted for, all data are reproduced or predicted essentially within the experimental uncertainties.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 8 (1987), S. 1-11 
    ISSN: 1572-9567
    Keywords: binary diffusion coefficient ; dilute gas ; mixtures ; second virial coefficient ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The second virial coefficient, dilute-gas viscosity, and binary diffusion coefficients of some binary-gas mixtures are predicted from potentials which have been fitted to the properties of the pure components. It has been noted that the SSR-MPA potential for polyatomic and the MSK potential for monatomic molecules together with a suitable set of universal combination rules are adequate to make predictions essentially within the inaccuracy of the data.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 8 (1987), S. 335-350 
    ISSN: 1572-9567
    Keywords: carbon dioxide ; dilute gas ; mixtures ; virial coefficient ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The SSR-MPA potential model is used to correlate and extrapolate the dilutegas properties of some systems containing CO2. With parameters determined from a consistent set of second virial and Joule-Thomson data, the third virial coefficient of CO2 as well as the second virial coefficients of various mixtures containing CO2 can be predicted very well. The Mason-Monchik approximation fails for a complicated molecule such as CO2, although at least a viscosity prediction of technical accuracy is obtained. If parameters fitted to the CO2 viscosity are used, excellent predictions can be made for the viscosity of gaseous mixtures containing CO2.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 13 (1975), S. 382-387 
    ISSN: 1741-0444
    Keywords: Premature atrial and premature ventricular contractions ; Missed beats ; Artefact detection ; Signall/noise ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire Notre programme ‘en circuit’ fut développé afin d'identifier les contractions atriales et ventriculaires prématurées et les battements omis. Nous sommes spécialement attentifs á reconnaitre les artefacts. 14 patients avec des degrés, d'arythmie élevés furent étudiés et 108 000 battements furent analysés indépendamment par des cardiologues et corrélés avec les analyses d'ordinateur. Sur un total de 7458 contractions ventriculaires prématurées, 411 phénomènes furent détectés en tant que positifs ou négatifs faux. Ceci représente une erreur de 5%. Sur les 826 contractions atriales prématurées, 140 erreurs furent relevées (17%). Sur un groupe de 1772 battements omis (av block etc.), 159 furent identifiés incorrectement (9%). Sur 1410 ectopies ventriculaires non prématurées, 164 résultats étaient incorrects (12%). La grande majorité des potentiels et artefacts musculaires fut correctement classifiée, et détectée (erreur—11–15%). Grâce á l'ordinateur numérique, l'analyse certaine des arythmies les plus importantes chez les patients sous soins intenses fut réalisée. Une partie principale du programme devrait être orientée vers la détection des artefacts.
    Abstract: Zusammenfassung Unser schritthaltendes Programm wurde entwickelt, um ein vorzeitiges Zusammenziehen von Atrium und Ventrikel sowie fehlende Herzschläge festzustellen. Die Erkennung von Artefakten erfolgt mit besonderer Sorgfalt. 14 Patienten mit starker Arrhythmie wurden untersucht. 108.000 Herzschläge wurden unabhängig voneinander von Kardiologen untersucht und mit der Rechneranalyse in Beziehung gebracht. Von insgesamt 7458 verfrühten Ventrikelkontraktionen waren 411 falsche Positive oder Negative. Hierbei, handelt es sich um eine Fehlerrate von 5%. Bei 826 vorzeitigen Atriumkontraktionen wurden 140 Fehler festgestellt (17%). In einer Gruppe von 1772 fehlenden Schlägen (av block usw.) wurden 159 falsch identifiziert (9%). Bei 1410 ektopischen Ventrikelkontraktionen, die nicht vorzeitig erfolgten erschienen 164 falsche Ergebnisse (12%). Die meisten Muskelpotentiale und Artefakte wurden richtig klassiert und entdeckt (Fehlerrate 11–15%). Mit Hilfe eines digitalen Rechners wurde eine zuverlässige Analyse der wichtigsten Arrhythmien bei Patienten auf Intensivstationen erreicht. Einer der wichtigsten Teile des Programms sollte sich mit der Feststellung von Artefakten befassen.
    Notes: Abstract Our online program was developed to identify premature atrial and ventricular contractions and missed beats. Special care is taken with the recognition of artefacts. 14 patients with a high rate of arrhythmias were studied and 108 000 beats analysed independently by cardiologists and correlated with the computer analysis. Of a total of 7458 premature ventricular contractions, 411 events were detected false positives or negatives. This is an error of 5%. Out of the 826 premature atrial contractions 140 mistakes were found (17%). In a group 1772 missed beats (av-block etc.) 159 were improperly identified (9%). Of 1410 ventricular ectopics without prematurity there were 164 incorrect results (12%). The vast majority of muscle potentials and artefacts was properly classified and detected (error 11–15%). The main reason for the errors is the bad signal-to-noise ratio experienced from time to time. With the help of a digital computer a reliable analysis of the most important arrhythmias in intensive care patients has been achieved. A main part of the program should be concerned with artefact detection.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 1983-07-01
    Print ISSN: 0948-7921
    Electronic ISSN: 1432-0487
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Springer
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  • 9
    Publication Date: 1987-01-01
    Print ISSN: 0195-928X
    Electronic ISSN: 1572-9567
    Topics: Physics
    Published by Springer
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  • 10
    Publication Date: 1987-05-01
    Print ISSN: 0195-928X
    Electronic ISSN: 1572-9567
    Topics: Physics
    Published by Springer
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