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  • 1985-1989  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Run don't walk (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 108-108 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR—The conclusion of Ker et al. (Nature 325, 147-149; 1987), that the arch of the human foot stores enough energy to make running more energy efficient, may have been anticipated by Sir Charles Bell. In his book The Hand its Mechanisms and Vital Endowments as Evincing Design, pub-lished in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327108c0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Two-dimensional choked transonic flow (1988)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 39 (1988), S. 1-12 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Es wird die schallnahe Sperrströmung um einen zweidimensionalen Flügel in einem weiten Windkanal analysiert. Asymptotische Reihenentwicklungen werden in der transsonischen Ähnlich-KeitsvariablenK T im inneren Bereich in der Nähe des Körpers und im äußeren Bereich nahe der Wandung konstruiert und verglichen. Die innere Reihenentwicklung besteht aus freier Schallströmung und einem Korrektionsglied. Die äußere Reihenentwicklung steht für das Zusammentreffen der Schallinie und der Grenzcharacteristik an der Wandung. Es werden die Größe des Korrektionsgliedes zur freien Schallströmung am Körper, als auch die Abhängigkeit der Machschen Zahl der freien Strömung von der Höhe des Windkanals bestimmt. Ein Randwertproblem wird formuliert um die Korrektur zur freien Schallströmung zu bestimmen.
    Notes: Summary Choked transonic flow about a thin two-dimensional airfoil in a wide wind tunnel is analyzed. Asymptotic expansions are constructed in terms of the transonic similarity variableK T as KT→0 (and the tunnel height→∞), in an inner region, “near” the body, and in an outer region, near the walls, and are matched. The inner expansion consists of sonic free flow plus a correction. The outer expansion accounts for the meeting of the sonic line and the limit characteristic at the wall. The magnitude of the correction to sonic free flight at the body as well as the dependence of the choking Mach number on the wind tunnel height are determined. A boundary value problem is formulated to determine the correction to the free flight sonic flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00945718
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Very converted transitions and particle-core coupling in neutron-deficient odd-mass au isotopes (1988)
    Springer
    The European physical journal 330 (1988), S. 371-376 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.−g
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Levels in185, 187Au have been studied by radioactive decay of isotopically separated185, 187Hg. A number of low-energy very-converted transitions are observed in the decay. It is shown that the enhanced conversion in these cases comes from an E0 component rather than from an anomaly in theM1 conversion process. A systematic pattern of bands interconnected with these very converted transitions is presented as evidence for a new type of particle-core coupling in185, 187Au.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290122
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    UNISOR on-line nuclear orientation facility (UNISOR/NOF) (1988)
    Springer
    Hyperfine interactions 43 (1988), S. 151-156 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The UNISOR on-line nuclear orientation facility (UNISOR/NOF) consists of a3He−4He dilution refrigerator on line to the isotope separator. Nuclei are implanted directly into a target foil which is soldered to the bottom accessed cold finger of the refrigerator. A 1.5 T superconducting magnet polarizes the ferromagnetic target foils and determines the axis of symmetry. Up to eight gamma detectors can be positioned around the refrigerator, each 9 cm from the target. A unique feature of this system is that the k=4 term in the directional distribution function can be directly and unambigously deduced so that a single solution for the mixing ratio can be found. The first on-line experiment at this facility reported here was a study of the decay of the191Hg and193Hg isotopes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398295
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  • 5
    Electronic Resource
    Electronic Resource
    A new criterion for the pairing of control and manipulated variables (1986)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 1439-1449 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A criterion is developed for the selection of the best pairing of the control and manipulated variables of a multiloop control system. This criterion is based on the difficulty caused by the interaction terms (the off-diagonal elements) in finding the inverse of the steady state gain matrix. From an analysis based on the proposition that the most desired or best pairing is that one for which the system most closely resembles a set of independent single-loop systems, a quantitative measure of the best pairing is obtained. Although the development of the pairing criterion is based on purely algebraic principles, the validity of the pairing criterion is evident from analogous developments obtained within the control framework. Furthermore, it is shown that the pairing criterion may be used to determine the stability of a multiloop control system, thus enhancing the value of the criterion presented.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690320905
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    Paper (German National Licenses)
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