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  • Binary search trees  (1)
  • Clustering  (1)
  • Michigan  (1)
  • Slug  (1)
  • Springer  (3)
  • American Meteorological Society
  • Springer Nature
  • 1980-1984  (3)
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Publisher
  • Springer  (3)
  • American Meteorological Society
  • Springer Nature
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  • 1980-1984  (3)
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  • 1
    ISSN: 1573-5052
    Keywords: Clustering ; Data-processing ; Michigan ; Numerical method ; Phytosociology ; Stratum ; Understory ; Development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary During May and June, 1974, relevés were obtained from 30 plantation stands in the Saginaw Forest in southeastern Michigan. The canopy trees in these plantations were planted between 1904 and 1938. The understory has developed naturally over the years. The forest plantations offer opportunities for study of the effects of the canopy on the structure and species composition of the understory. A new numerical method of data structuring was used, which is based on the detection patterns of associated species within the table of 30 relevés from Saginaw Forest plantations. The method employs two difference measures. DIF 1 uses presence/absence data and DIF 2 the cover/abundance values obtained from the relevés. Both difference measures supply distance values for every pair of relevés. The least dissimilar relevés are then grouped together by the farthest neighbor agglomerative algorithm of Lance & Williams (1967). The DIF 1 analysis was inconclusive, but the DIF 2 analysis gave coherent results. It has shown that relevés with similar canopies have similar understories. The differences in understories among the relevés are due less to species composition than to the relative abundances of the species.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of parallel programming 9 (1980), S. 15-29 
    ISSN: 1573-7640
    Keywords: Binary search trees ; sorting ; symbol tables
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract It is possible to construct a binary search tree by inserting items at the root instead of adding them as leaves. When used for sorting, the method has several desirable properties, including (a) fewer comparisons in the best case, (b) fewer comparisons in the worst case, (c) a reduced variance, and (d) good performance when the items are already nearly sorted or nearly reverse sorted. For applications in which the tree is searched for existing items as well as having new items added to it (e.g., in the construction of a symbol table), the tree can be made to exhibit stacklike behavior, so that the fewest comparisons are required to locate the most recently used items.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 6 (1980), S. 435-444 
    ISSN: 1573-1561
    Keywords: Slug ; Deroceras reticulatum ; plant component ; volatile ; behavior ; attractant ; feeding ; unsaturated C6 alcohols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A new bioassay was devised in which slugs were allowed to follow trails of the aqueous volatiles isolated from plants by vacuum distillation. Volatiles from lettuce, carrot and dandelion induced greatest response. Components from lettuce, which at their most active concentrations can cause a response similar to that from the whole plant, were identified.
    Type of Medium: Electronic Resource
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