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Nees Jan van Eck

@neesjanvaneck.bsky.social
83 followers 30 following 3 posts

Senior researcher at CWTS, Leiden University; Developer of VOSviewer

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Reposted by Nees Jan van Eck
Ludo Waltman @ludowaltman.bsky.social · 28/04/2026
This blog post summarizes the strategic plan we developed at @cwts.nl for our work on open research information. We aim to make open research information the norm. This will improve how science is studied, governed, and practiced. Very proud of our ambitious plans in this important area!
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Reposted by Nees Jan van Eck
Leiden Madtrics @leidenmadtrics.bsky.social · 28/04/2026
The 2026–2028 strategic plan for the Information & Openness focal area at @cwts.nl is published! Read the blogpost by Kathleen Gregory, Mark Neijssel, and Nees Jan van Eck for an overview of our vision and goals to advance the adoption of open research information in the coming years.
leidenmadtrics.nl
Advancing open research information: The next three years of the Information & Openness focal area
Today we published the 2026-2028 strategic plan for the Information & Openness focal area. This blogpost provides an overview of the plan, describing our vision and objectives for advancing the uptake...
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Bianca Kramer @msphelps.bsky.social · 31/03/2026
OpenAlex (openalex.org) is rapidly closing the gap in funding metadata coverage. Re-using a dataset of NWO-funded papers we find they're now on par with Scopus and just slightly behind Dimensions. Full analysis with @hldejonge.bsky.social : 🔗 bmkramer.github.io/SesameOpenSc...
bmkramer.github.io
Funding metadata in OpenAlex: where are they now? | Sesame Open Science
With a grant from Wellcome, OpenAlex is working to improve its coverage of funding metadata. The three-year project started in September 2025, and the effects are already visible. Building on an earli...
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Rodrigo Costas @rodrigocostas.bsky.social · 16/02/2026
Today we launch ORION: a coordinated initiative to make open research information more inclusive, accessible and democratic. Our experience with GoogleBigQuery support collaborative and community solutions for ORI infrastructures, increasing sustainability & resilience. doi.org/10.54900/2pn...
doi.org
Sharing the load: Building a collective to support open research information online
Can we share resources and burdens to make available key open research information resources in actionable and connectable form in the cloud? Through sharing processes and systems, is it possible, ove...
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Najko Jahn @najko.bsky.social · 16/02/2026
Today we're starting ORION, an effort to coordinate making #openresearchinformation resources available, with an initial focus on Google BigQuery. We are keen to coordinate with all who are interested in supporting a community effort towards availability and reusability! doi.org/10.54900/2pn...
doi.org
Sharing the load: Building a collective to support open research information online
Can we share resources and burdens to make available key open research information resources in actionable and connectable form in the cloud? Through sharing processes and systems, is it possible, ove...
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Reposted by Nees Jan van Eck
COMET @cometadata.bsky.social · 08/01/2026
1.9 million author entries. 2.1 million affiliation entries. 1.75 million matched to ROR IDs. That's what our fine-tuned open-weight model extracted from 430,000 arXiv preprints. Join us on 21 Jan to discuss the results. 📅 Register: datacite.zoom.us/meeting/regi...
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Leiden Madtrics @leidenmadtrics.bsky.social · 29/10/2025
📊 Today, the CWTS Leiden Ranking 2025 has been released. The new Open Edition marks a next step towards more open and more inclusive research analytics for universities. Our new blog post highlights the most significant developments. 👇 Read it now on Leiden Madtrics
leidenmadtrics.nl
The CWTS Leiden Ranking 2025 - More open, more inclusive, more informative
The release of the CWTS Leiden Ranking 2025 marks a next step toward more open and more inclusive research analytics for universities. This post highlights the most significant developments.
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CWTS | Leiden University @cwts.nl · 29/10/2025
📊 The CWTS Leiden Ranking 2025 is online! 🎉 This time, we have released not one, but two editions: the Traditional Edition and the Open Edition. www.leidenranking.com
leidenranking.com
CWTS Leiden Ranking
The CWTS Leiden Ranking offers important insights into the scientific performance for major universities worldwide. Select your preferred indicators, generate results, and explore the performance of u...
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Ludo Waltman @ludowaltman.bsky.social · 17/10/2025
There is considerable discussion about the (lack of) openness of metadata of journal articles, but how do preprint servers perform in terms of openly available metadata? @neesjanvaneck.bsky.social and I report our findings in a new @leidenmadtrics.bsky.social blog post doi.org/10.59350/te7....
doi.org
Crossref as a source of open bibliographic metadata for preprints
Crossref is a crucial source of open bibliographic metadata for articles published in scientific journals. Importantly, however, Crossref can also serve as a source of bibliographic metadata for prepr...
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Leiden Madtrics @leidenmadtrics.bsky.social · 16/10/2025
@crossref.bsky.social is a crucial source of open bibliographic metadata for articles published in scientific journals, but how complete is its metadata on preprints? In our latest blog post, @neesjanvaneck.bsky.social and @ludowaltman.bsky.social investigate 👇 Read it now on Leiden Madtrics
leidenmadtrics.nl
Crossref as a source of open bibliographic metadata for preprints
Crossref is a crucial source of open bibliographic metadata for articles published in scientific journals. Importantly, however, Crossref can also serve as a source of bibliographic metadata for prepr...
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Reposted by Nees Jan van Eck
COMET @cometadata.bsky.social · 15/10/2025
🗓️ Register at: datacite.zoom.us/meeting/regi...
What if the metadata curation work institutions already do could benefit the broader research ecosystem? Join us at the COMET community meeting on 30 October to explore leveraging curation from CRIS Systems
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COMET @cometadata.bsky.social · 23/09/2025
Can you help assess how our project advances the COMET model? We've connected arXiv preprints to published articles with 95%+ precision. Join our community evaluation of this demonstration project. 🗓️ 3 October - Community Project Assessment Register: datacite.zoom.us/meeting/regi...
datacite.zoom.us
Welcome! You are invited to join a meeting: End-of-Project Community Assessment: Match Preprints to Published Journal Articles . After registering, you will receive a confirmation email about joining ...
Thank you for contributing your time to help shape COMET's future direction and strengthen our collective approach to metadata enrichment. To allow time for meaningful feedback from all participants...
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COMET @cometadata.bsky.social · 17/07/2025
New on the blog, Organizer @neesjanvaneck.bsky.social Nees Jan van Eck from @cwts.nl explains why CWTS is passionate about enriching #metadata and participating in COMET. A must-read! 👉 www.cometadata.org/blog/cwts
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Reposted by Nees Jan van Eck
COMET @cometadata.bsky.social · 16/07/2025
If you missed COMET's Community Meeting, you can watch the recording on Zenodo: zenodo.org/records/1592... Organizers Nees Jan van Eck @neesjanvaneck.bsky.social, Adam Buttrick, and Dione Mentis give an update on our progress, introduce the COMET Model, and demonstrate pilot projects.
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CWTS | Leiden University @cwts.nl · 15/05/2025
🔍 Registration is now 𝗢𝗣𝗘𝗡 for the 4th edition of the Scientometrics Using Open Data (𝗼𝗻𝗹𝗶𝗻𝗲) course! Co-hosted by @cwts.nl & Curtin Open Knowledge Initiative (COKI) 📅 4 Nov – 7 Nov 2025 🕑 14.00 to 18.00 CET 🔗 Learn more and sign up now: 👉🏼 www.universiteitleiden.nl/en/courses/s...
universiteitleiden.nl
Scientometrics Using Open Data
Open data sources such as Crossref, DataCite, ORCID, OpenAlex, OpenCitations, and many others offer important opportunities to perform scientometric analyses in more transparent, inclusive, and reprod...
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Nees Jan van Eck @neesjanvaneck.bsky.social · 12/05/2025
New update of statistics on availability of open publication metadata in Crossref. Openness of publication metadata keeps increasing, but there have been no major changes compared to last year. Paper: doi.org/10.31222/osf... Data: doi.org/10.5281/zeno... Figures: tinyurl.com/3zk5nvvf @cwts.nl
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