The Nature Index is a database of creator affiliations and institutional relationships. The index tracks contributions to analysis articles printed in high-quality natural-science and health-science journals, chosen primarily based on status by an impartial group of researchers.
The Nature Index offers absolute and fractional counts of article publication on the institutional and nationwide stage and, as such, is an indicator of worldwide high-quality analysis output and collaboration. Information within the Nature Index are up to date frequently, with the newest 12 months made obtainable below a Inventive 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 at the least 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.
To glean a rustic’s, territory’s, area’s or an establishment’s contribution to an article, and to make sure that they don’t seem to be counted greater than as soon as, the Nature Index makes use of Share, a fractional rely that takes into consideration the share of authorship on every article. The entire Share obtainable per article is 1, which is shared amongst all authors below the idea that every contributed equally. For 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 break up equally between every establishment. The entire Share for an establishment is calculated by summing the Share for particular person affiliated authors. The method is analogous for international locations/territories, though difficult by the truth that some establishments have abroad labs that will likely be counted in direction of host nation/territory totals.
Adjusted Share accounts for the small annual variation within the whole variety of articles within the Nature Index journals. It’s arrived at by calculating the proportion distinction within the whole variety of articles within the Index in a given yr relative to the variety of articles in a base yr and adjusting Share values to the bottom yr 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 may be between any two establishments or international locations/territories co-authoring at the least 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 experiences, ordered by Depend or Share.
Every question will return a profile web page that lists the nation or establishment’s current outputs, from which it’s doable to drill down for extra data. Articles may be displayed by journal, after which by article. Analysis outputs are organized by topic space. The pages record the establishment or nation’s/territory’s prime 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 2024 Science cities complement is predicated on the Nature Index database, overlaying analysis articles between 2015 and 2023. The evaluation makes use of article share (Share) as the first metric, with time collection figures adjusted to 2023 ranges. Every metropolis’s Share is calculated by summing the Share of affiliated establishments positioned within the metropolis. For establishments spanning a number of cities, such because the Chinese language Academy of Sciences, entities have been assigned to town the place they’re positioned.
Nature Index 2024 Science cities
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 primarily based on official specs from census bureaus, statistical workplaces, authorities workplaces or as described in authorized paperwork. The specs usually 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 several topics, ranked by Share 2023. The main ten establishments by Share 2023 in every of the 5 main cities, particularly Beijing, Shanghai, the New York metropolitan space, the Boston metropolitan space and Nanjing, are additionally included.
This text is a part of Nature Index 2024 Science cities, a complement produced with monetary assist from the Beijing Municipal Science & Know-how Fee, Administrative Fee of Zhongguancun Science Park. Nature maintains full independence in all editorial choices associated to the content material. For extra details about Nature Index, see the homepage.
