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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta biotheoretica 41 (1993), S. 249-266 
    ISSN: 1572-8358
    Keywords: Competition theory ; Volterra ; information in competition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Reconsideration of the logistic equation and of its expansion to the special and general Volterra competition equations in terms of mass/energy in phase-space, shows that information on the phase-spatial conditions of resource and consumers determines specific population parameters which, in turn, decide on coexistence and extinction. Thus, introduction ofInformation as a separate and independent biophysical parameter, in analogy, and in addition, to Force in Classical Physics, is necessary. This allows for quantification of informational effects on resource flows and population numbers. As such, different population growth dN/dt during a competitive exclusion process, is theeffect of competition, and not itscause. It is found that species recognition of “self” and ignorance of other consumers and of their phase-spatial conditions of resource supplies stabilizes coexistence, while excess information on competitors and on resource supplies destabilizes community structure. These findings are particularly relevant for the speciesHomo sapiens. Among other, apparently disparate population phenomena, Information as a causative parameter also resolves the controversy of “complexity and stability” in biological systems.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0992-7689
    Keywords: Ionosphere ; Auroral ionosphere ; Polar ionosphere ; Radio science (ionospheric physics)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Experimental results are presented from ionospheric tomography, the EISCAT Svalbard radar and the CUTLASS HF radar. Tomographic measurements on 10 October 1996, showing a narrow, field-aligned enhancement in electron density in the post-noon sector of the dayside auroral zone, are related to a temporal increase in the plasma concentration observed by the incoherent scatter radar in the region where the HF radar indicated a low velocity sunwards convection. The results demonstrate the complementary nature of these three instruments for polar-cap ionospheric studies.
    Type of Medium: Electronic Resource
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