Biomedical Engineering Reference
In-Depth Information
Figure 28.4
Rank-frequency plot of data contributions to CDD. Solid line: power law
with
α
=
2.2; dashed line,
α
=
2.7.
Figure 28.5
Rank-frequency plot of data contributions to ChemSpider. Diamonds:
curations, line is power law with
α
=
1.4. Circles: depositions, line with
α
=
1.5.
tigation. There is evidence that in some cases the exponent of the power law
refl ects the diffi culty of the task, for example, Twitter (easy) versus writing an
original article for Wikipedia (hard) [82], but it does not appear to us that
chemistry curation should be more or less complex than contributing to a
business challenge. Instead we are drawn to the hypothesis that we are seeing
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