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  • 1990-1994  (3)
  • 1975-1979  (2)
  • 1935-1939  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Renormalization group analysis of the Reynolds stress transport equation (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 1759-1766 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The pressure-gradient–velocity correlation and return to isotropy term in the Reynolds stress transport equation are analyzed using the Yakhot–Orszag renormalization group. The perturbation series for the relevant correlations, evaluated to lowest order in the ε expansion of the Yakhot–Orszag theory, are infinite series in tensor product powers of the mean velocity gradient and its transpose. Formal lowest-order Padé approximations to the sums of these series produce a rapid pressure strain model of the form proposed by Launder et al. [J. Fluid Mech. 68, 537 (1975)], and a return to isotropy model of the form proposed by Rotta [Z. Phys. 129, 547 (1951)]. In both cases, the model constants are computed theoretically. The predicted Reynolds stress ratios in simple shear flows are evaluated and compared with experimental data. The possibility is discussed of deriving higher-order nonlinear models by approximating the sums more accurately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.858396
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  • 2
    Electronic Resource
    Electronic Resource
    Intravenous Gammaglobulin for Pediatric HIV-1 Infection: Effects on Infectious Complications, Circulating Immune Complexes, and CD4 Cell Decline (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 693 (1993), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1993.tb26263.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    How to optimize discrete-event systems from a single sample path by the score function method (1990)
    Springer
    Annals of operations research 27 (1990), S. 175-212 
    Details
    ISSN: 1572-9338
    Keywords: Monte Carlo optimization ; optimization in simulation ; sample path analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract We present a method for deriving theoptimal solution of a class of mathematical programming problems, associated with discrete-event systems and in particular with queueing models, while using asingle sample path (single simulation experiment) from the underlying process. Our method, called thescore function method, is based on probability measure transformation derived from the efficient score process and generating statistical counterparts to the conventional deterministic optimization procedures (e.g. Lagrange multipliers, penalty functions, etc.). Applications of our method to optimization of various discrete-event systems are presented, and numerical results are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02055195
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  • 4
    Electronic Resource
    Electronic Resource
    On the elastic-plastic torsion problem (1977)
    Springer
    Journal of engineering mathematics 11 (1977), S. 319-323 
    Details
    ISSN: 1573-2703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Technology
    Notes: Summary It is shown that solving the elastic-plastic torsion problem is equivalent to solving a nonlinear boundary value problem. The equivalence is valid for a strictly convex cross-section and angles of twist large enough that the plastic region encloses the elastic region. The advantage of this formulation is that no free boundaries are present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01537091
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Geschwindigkeit der Feuchtigkeitsaufnahme durch Magnesiumsulfat (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 89-91 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280113
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Further developments of a damage theory for filled polymers (1979)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 19 (1979), S. 151-161 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This paper investigates matrix debonding from filler particles as a mechanism for weakening of a filled polymer. We analyze several simplified models of debonding. Our main concern is its effect on the overall elastic instants; for each debonding model, we calculate the change ΔW in overall strain energy density due to debonding. The resulting formulas for ΔW are all special cases of one general expression. Accordingly, we propose that this expression describes a broad class of debonding models, including some for which a detailed stress and strain analysis is not possible.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760190219
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