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  • 1
    Electronic Resource
    Electronic Resource
    Competition and cooperation in catalytic selfreplication (1981)
    Springer
    Journal of mathematical biology 11 (1981), S. 155-168 
    Details
    ISSN: 1432-1416
    Keywords: Catalytic selfreplication ; Concentration simplex ; Dynamical systems ; Flow reactor ; Hypercycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract It is shown that in a flow reactor, hypercyclic coupling of self-reproducing macromolecular species leads to cooperation, i.e. none of the concentrations will vanish. On the other hand, autocatalytic selfreproducing macromolecules usually compete, and the number of surving species increases with the total concentration. Both results are proved under very general assumptions concerning the growth rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275439
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The recovery phase of galactic cosmic ray modulation in the outer heliosphere (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Energetic hydrogen and helium nuclei from the galaxy (cosmic rays) enter the solar system with varying degrees of difficulty during the 11-year solar magnetic cycle, resulting in spatial and temporal variations of particle intensities in the heliosophere. Observations of these variations from the ISEE-3, Voyager 1 and 2, and Pioneer 10 spacecraft during the period from early 1981 to early 1986 and for heliocentric distances ranging from 1 to 37 AU are reported. During this time the high energy intensities in the outer heliosphere have been increasing exponentially at a rate of approximately 20 percent/year with occasional interruptions due to enhanced solar activity. The radial intensity gradients measured in the ecliptic plane are observed to remain constant or to decrease at the time of the reversal of the solar magnetic poles in 1980.
    Keywords: SPACE RADIATION
    Type: Geophysical Research Letters (ISSN 0094-8276); 13; 785-788
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The large scale dynamics of the outer heliosphere and the long-term modulation of galactic cosmic rays (1985)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The network of cosmic ray observatories reaching across the heliosphere has given new insight into the process of solar modulation, establishing that the decreases occur principally in the outer heliosphere and are produced by interplanetary flow systems; that the hysteresis effects appear to be produced by changes in the rigidity dependence of the diffusion coefficient and that the predicted effects on the cosmic ray gradients associated with the reversal of the solar magnetic field polarity are not observed.
    Keywords: SPACE RADIATION
    Type: SH-4.7-3 , 19th Intern. Cosmic Ray Conf - Vol. 5; p 193-196; NASA-CP-2376-VOL-5
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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