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  • 1
    Electronic Resource
    Electronic Resource
    Partition Correlation Matrices for Heterogeneous Quantitative Data (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 602-602 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Let the set of values for an attribute x, some of which are zeros, be denoted by a vector [0, x], and let mx be the mean of the non-zero values. Let this vector be regarded as the sum of a qualitative (L) vector [0, mx], in which all non-zero values are replaced by mXf and a quantitative (N) vector ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196602b0
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  • 2
    Electronic Resource
    Electronic Resource
    Computers as Botanists : Substance of a Friday Evening Discourse delivered at the Royal Institution on October 26 (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 1047-1049 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN any day and age some scientific opinions have been less acceptable than others. Galileo found himself in difficulties as a result of holding currently unfashionable views on the manner in which the universe conducted itself; and in Galileo's day you suffered, if suffer you did, at the hands of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1971047a0
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  • 3
    Electronic Resource
    Electronic Resource
    Automatic Subdivision of Associated Populations (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 1755-1755 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The problem is to find the attribute which, at each stage of subdivision, is most likely to reduce the residual associations to their lowest possible level. At first sight, an attractive solution would appear to be to divide on the attribute with the highest loading, irrespective of sign, on the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1821755a0
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  • 4
    Electronic Resource
    Electronic Resource
    Urease Metabolism in Citrullus (1951)
    [s.l.] : Nature Publishing Group
    Nature 168 (1951), S. 659-660 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Moreover, examination by Granick's3 histochemical method shows that the urease is retained in the bundle-sheaths (the cells of which enlarge relatively little) long after it has disappeared from the meso-phyll; detached cotyledons, which expand more slowly than do cotyledons attached to the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/168659c0
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative Estimation of Stomatal Starch (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 34-35 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have devised such a method, using as our measure the area of the starch-grains. Strips of epidermis were mounted in Heath's1 reagent (which stains the starch without affecting the aperture), and stomata selected at random were photographed on 35-mm. film (Kodak 'Microfile'). The resulting ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/166034b0
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  • 6
    Electronic Resource
    Electronic Resource
    Function of Urease in Citrullus Seeds (1950)
    [s.l.] : Nature Publishing Group
    Nature 165 (1950), S. 79-79 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I suggest that the urease is present simply as a reserve protein, and that its urea-hydrolysing capacities are, so far as the seed is concerned, completely irrelevant. If this is true, some light might be expected to be thrown on the problem by investigating the fate of the urease when the seed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/165079a0
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  • 7
    Electronic Resource
    Electronic Resource
    Nodal Analysis of Associated Populations (1961)
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 202-202 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Despite many attempts, we have found no way of operating directly on the 2-way table, and have therefore devised a method which involves finding the best possible coincidences with each direction taken as reference direction in turn, followed by collation of the two sets of results so obtained. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/191202a0
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  • 8
    Electronic Resource
    Electronic Resource
    An Objective Method of Weighting in Similarity Analysis (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 426-426 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has always been known that these methods may fail if very few attributes are available or if many of the attributes are lacked (or possessed) by nearly all the individuals. This disadvantage is not so marked in Tanimoto's5 method, where the individuals are clustered about a number of apices, or ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201426a0
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  • 9
    Electronic Resource
    Electronic Resource
    Logic of Computer-Based Intrinsic Classifications (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 159-161 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE believe that the rationale of the numerical techniques for the classification of elements into sets has been widely misunderstood. This misunderstanding has given rise, on one hand, to exaggerated respect for the 'absolute' nature of the classifications so produced and, on the other, to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207159a0
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  • 10
    Electronic Resource
    Electronic Resource
    A Generalized Sorting Strategy for Computer Classifications (1966)
    [s.l.] : Nature Publishing Group
    Nature 212 (1966), S. 218-218 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We shall now erect a general system of which all these are special cases. What follows applies rigorously only to measures with the general properties of a Euclidean distance; other measures, for example, the correlation coefficient, require further investigation. The system does not incorporate ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/212218a0
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