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  • 1
    Electronic Resource
    Electronic Resource
    A self-consistent master equation and a new kind of cumulants (1993)
    Springer
    The European physical journal 92 (1993), S. 399-407 
    Details
    ISSN: 1434-6036
    Keywords: 05.40.+j ; 02.50.+s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Generalized master equations correspond to different kinds of cumulants. Here, we discuss the recently introduced non-crossing cumulants from a physical point of view and propose the corresponding integro-differential master equation as a new type of equation for a self-consistent treatment of memory effects. We prove the cluster property of the non-crossing cumulants, and show that the Gaussian approximation of our equation is given by a random matrix process. As an instructive example for our expansion formula we treat the random frequency-modulated oscillator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01308760
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  • 2
    Electronic Resource
    Electronic Resource
    Spectra of Hamiltonians with generalized single-site dynamical disorder (1994)
    Springer
    The European physical journal 95 (1994), S. 101-111 
    Details
    ISSN: 1434-6036
    Keywords: 05.40.+j ; 02.50.+s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from the deformed commutation relationsa q (t) a † q (s)−q a † q (s) a q (t)=Γ(t−s)1, −1≦q≦1 with a covariance Γ(t−s) and a parameterq varying between −1 and 1, a stochastic process is constructed which continuously deforms the classical Gaussian and classical compound Poisson process. The moments of these distinguished stochastic processes are identified with the Hilbert space vacuum expectation values of products of $$\hat \omega _q (t) = \gamma (a_q (t) + a_q^\dag (t)) + \xi a_q^\dag (t)a_q (t)$$ with fixed parametersq, γ and ξ. Thereby we can interpolate between dichotomic, random matrix and classical Gaussian and compound Poisson processes. The spectra of Hamiltonians with single-site dynamical disorder are calculated for an exponential covariance (coloured noise) by means of the time convolution generalized master equation formalism (TC-GME) and the partial cumulants technique. The final result for the spectral function is given as aq-dependent infinite continued fraction. In the case of the random matrix processes the infinite continued fraction can be summed up yielding a self-consistent equation for the one-particle Green function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01316850
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  • 3
    Electronic Resource
    Electronic Resource
    An experimental method to test the effects of local emission reductions during summersmog (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 23-34 
    Details
    ISSN: 1573-2932
    Keywords: effects of local emission reductions ; meteorology and air pollution ; ozone experiment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A method is presented that makes it possible to eliminate some of the meteorological influence on the change in air pollutant concentrations (mainly NOχ and ozone) when considering the effects of local emission reductions. The relation of measurements outside the test area to values inside the area for normal conditions (i.e. defined weather type, no emission reduction in the test area) allows prediction of the values for the test area during emission reductions, but only if this relation shows a good correlation. This prediction includes the influence of meteorological factors that are distributed more or less homogeneously within an area of about 100 km × 100 km, which includes a large part of the meteorological influence. The comparison of predicted and measured values in the test area shows the effect of emission reduction, with the uncertainty of remaining meteorological effects, of course. The method is applied to the Heilbronn ozone experiment in summer 1994. Most precise results are obtained for ozone, while conclusions for nitrogen oxides are more uncertain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406153
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  • 4
    Electronic Resource
    Electronic Resource
    AN EXPERIMENTAL METHOD TO TEST THE EFFECTS OF LOCAL EMISSION REDUCTIONS DURING SUMMERSMOG (1997)
    Springer
    Water, air & soil pollution 95 (1997), S. 23-34 
    Details
    ISSN: 1573-2932
    Keywords: effects of local emission reductions ; meteorology and air pollution ; ozone experiment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A method is presented that makes it possible to eliminate some of the meteorological influence on the change in air pollutant concentrations (mainly NOx and ozone) when considering the effects of local emission reductions. The relation of measurements outside the test area to values inside the area for normal conditions (i.e. defined weather type, no emission reduction in the test area) allows prediction of the values for the test area during emission reductions, but only if this relation shows a good correlation. This prediction includes the influence of meteorological factors that are distributed more or less homogeneously within an area of about 100 km × 100 km, which includes a large part of the meteorological influence. The comparison of predicted and measured values in the test area shows the effect of emission reduction, with the uncertainty of remaining meteorological effects, of course. The method is applied to the Heilbronn ozone experiment in summer 1994. Most precise results are obtained for ozone, while conclusions for nitrogen oxides are more uncertain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026416707446
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  • 5
    Electronic Resource
    Electronic Resource
    Mikrobielle Werkstoffzerstörung - Schadensfälle und Gegenmaßnahmen für Kunst- und Naturstoffe. Mikrobiologische Zerstörung von Silikon-Elastomeren (1994)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 45 (1994), S. 170-171 
    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
    Notes: Microbial deterioration of materials - case histories and countermeasures for plastics and natural materials: Biodeterioration of silicone elastomers
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19940450307
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchung des Waschprozesses in FilterpressenVortrag auf der Sitzung des GVC-Fachausschusses „Mechanische Flüssigkeitsabtrennung“ am 14. April 1981 in Lindau. (1981)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 53 (1981), S. 957-959 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330531208
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