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  • 1
    Electronic Resource
    Electronic Resource
    Competitive processes in a monoculture of Pinus radiata D. Don (1989)
    Springer
    Oecologia 81 (1989), S. 57-61 
    Details
    ISSN: 1432-1939
    Keywords: Competition ; Pinus radiata ; Diameter distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The changes between 9 and 40 years of age of the frequency distribution of tree diameters were studied in an experiment in a plantation of Pinus radiata D. Don in South Australia in which the spacing between trees at planting varied. Empirical functions were developed to relate tree diameter to growth rate in diameter, variance of growth rate in diameter and mortality rate. These functions were used in solving a forward diffusion equation to predict future diameter distributions. The contributions from each of the terms in the diffusion equation were examined and it was found that the drift (growth rate in diameter) term made the greatest contribution to the solution, whilst the diffusion (variance in growth rate) term had neglible effect. This implied that competition between individual trees for light was the dominant competitive process operating in this plantation, rather than below ground competition for soil resources. The ramifications of this finding to forest growth modelling are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377010
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spatial analysis of two-dimensional orientation data (1985)
    Springer
    Mathematical geology 17 (1985), S. 177-194 
    Details
    ISSN: 1573-8868
    Keywords: orientation data ; principal coordinate analysis ; spatial analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract A frequently encountered problem in structural geology is the analysis and interpretation of directional data with a geographical distribution. Such data may arise, for example, as samples of fracture strikes collected at a number of locations (rocky outcrops, road cuttings, etc.), trends of geological structures mapped in underground mines where they are exposed in the tunnel roof, or as lineaments annotated on aerial or satellite photographs. From such data, it is of interest to determine the structural domains in the area, that is, to partition the area into subareas of homogeneous structural pattern. This paper presents a method for performing such an analysis, and applies it to a data set collected from an underground coal mine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033153
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The additive group of a regular ring (1981)
    Springer
    Periodica mathematica Hungarica 12 (1981), S. 221-227 
    Details
    ISSN: 1588-2829
    Keywords: Primary 20K99 ; Secondary 16A30 ; Abelian group ; regular ring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01849789
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    Paper (German National Licenses)
    Fulltext
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