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The Nature Index is a database of creator affiliations and institutional relationships. The index tracks contributions to analysis articles printed in 82 high-quality natural-science journals, chosen by an impartial group of researchers.
The Nature Index supplies absolute and fractional counts of article publication on the institutional and nationwide stage and, as such, is an indicator of world high-quality analysis output and collaboration. Knowledge within the Nature Index are up to date often, with the latest 12 months made obtainable below a Artistic Commons licence at natureindex.com. The database is compiled by Nature Portfolio.
Nature Index metrics
The Nature Index makes use of Depend and Share to trace analysis output. A rustic/territory or an establishment is given a Depend of 1 for every article that has no less than one creator from that nation/territory or establishment. That is the case whatever the variety of authors an article has, and it signifies that the identical article can contribute to the Depend of a number of international locations/territories or establishments.
Nature Index 2022 Science cities
To glean a rustic’s, territory’s, area’s or an establishment’s contribution to an article, and to make sure that they aren’t counted greater than as soon as, the Nature Index makes use of Share, a fractional depend that takes under consideration the share of authorship on every article. The full Share obtainable per article is 1, which is shared amongst all authors below the idea that every contributed equally. As an example, an article with 10 authors signifies that every creator receives a Share of 0.1. For authors who’re affiliated with a couple of establishment, the creator’s Share is cut up equally between every establishment. The full Share for an establishment is calculated by summing the Share for particular person affiliated authors. The method is analogous for international locations/territories, though sophisticated by the truth that some establishments have abroad labs that might be counted in the direction of host nation/territory totals.
Adjusted Share accounts for the small annual variation within the complete variety of articles within the Nature Index journals. It’s arrived at by calculating the share distinction within the complete variety of articles within the Index in a given 12 months relative to the variety of articles in a base 12 months and adjusting Share values to the bottom 12 months ranges.
The bilateral collaboration rating (CS) between two establishments A+B is the sum of every of their Shares on the papers to which each have contributed. A bilateral collaboration could be between any two establishments or international locations/territories co-authoring no less than one article within the journals tracked by the Nature Index.
NATUREINDEX.COM
natureindex.com customers can seek for particular establishments or international locations and generate their very own stories, ordered by Depend or Share.
Every question will return a profile web page that lists the nation or establishment’s latest outputs, from which it’s doable to drill down for extra info. Articles could be displayed by journal, after which by article. Analysis outputs are organized by topic space. The pages checklist the establishment or nation’s/territory’s high collaborators, in addition to its relationship with different organizations. Customers can monitor an establishment’s efficiency over time, create their very own indexes and export desk information.
This complement
The Nature Index 2022 Science cities complement relies on information from natureindex.com, overlaying articles printed from 1 January 2015 to 31 December 2021. The evaluation makes use of article share (Share) as the first metric, with time sequence figures adjusted to 2021 ranges. Every metropolis’s Share is calculated by summing the Share of affiliated establishments situated within the metropolis. For establishments spanning a number of cities, such because the Chinese language Academy of Sciences, entities had been assigned to town the place they’re situated.
For a number of essentially the most populous conurbations with important output within the index in the US, Canada, Japan, South Korea, India and Europe, we outlined boundaries of metropolitan areas based mostly on official specs from census bureaus, statistical places of work, authorities places of work, or as described in authorized paperwork. The specs sometimes group adjoining areas which have a excessive diploma of social and financial integration, as measured by commuting ties. When an vital establishment with sturdy connections to different establishments within the metropolis was located simply outdoors the metropolitan space, we adjusted the boundary to embody that establishment.
The tables present the main science cities and metropolitan areas total and in numerous topics, ranked by Share 2021. The main ten establishments by Share 2021 in every of the 5 main cities, particularly Beijing, the New York metropolitan space, Shanghai, the Boston metropolitan space and the San Francisco Bay Space, are additionally included.
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