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Fernando Pérez

@fernandoperez.org

1.5K followers 580 following 120 posts

Open source, open science, AI in science for earth/ice and healthcare. IPython creator, @projectjupyter.bsky.social and 2i2c.org co-founder. Prof @ UC Berkeley Stats, director of @ucbids.bsky.social, co-director @schmidtdse.bsky.social; LBL scientist.

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Fernando Pérez @fernandoperez.org · Nov 7

Well, time to start setting up shop for real away from Twitter - used to be fperez_org there, used it a lot as a science feed and community building tool, til the Musk purchase.

Went quiet since but hadn't fully moved on; the election seems like a good time to shut the curtains and move.

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Russ Poldrack @russpoldrack.org · 1d

OpenNeuro @openneuro.bsky.social just hit a huge milestone: 1500 datasets! Congrats to the team on making this project so successful over the last 7 years.

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Fernando Pérez @fernandoperez.org · 4d

CC @choldgraf.com @row1.ca as per the discussions we've been having on the @mystmd.org Discord ;)

@jtauber.com - this issue has some discussions relevant to this question:

github.com/jupyter-book...

Support Wiki and Obsidian cross-reference syntax `[[ target | alternative title ]]` · Issue #1144 · jupyter-book/mystmd

In the wiki and the Obsidian world, they use a bracket-style syntax for cross references within and between pages. These are roughly the links I'm talking about: [[ link target ]] (target can be a ...

github.com

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Wim Thiery @wimthiery.bsky.social · 4d

Honored to see our MeteoSaver software featured among the @time.com top-400 best inventions of 2025. MeteoSaver is a open-source weather data rescue software developed by @derrickmuheki.bsky.social working @hydr-vub.bsky.social @vubrussel.bsky.social

time.com/collections/...

MeteoSaver: The Best Inventions of 2025: Special Mentions

Find out why MeteoSaver earned a special mention on TIME's list of 2025's best inventions.

time.com

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Kyle Cranmer @kylecranmer.bsky.social · 5d

This has been a wonderful project. It was one of the first examples that clearly demonstrated the power of separating specification from implementation in HEP analysis software and also ushered in major advances in rich publishing for open science.

Matthew Feickert @matthewfeickert.com · 5d

Seems that #pyhf has finally creeped over the 200 citations on INSPIRE recently. :) 🎉

inspirehep.net/literature?q...

inspirehep.net/literature/1...

Nice little milestone for us all to celebrate, @lukasheinrich.com, @giordonstark.com, @kylecranmer.bsky.social. Cheers!

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Climate.us @climate.us · 8d

Imagine, just for a moment, a climate future where the facts cannot be deleted...

If that sounds like an ideal future for you and/or your family make sure to check out our website (Climate.us) and give us a follow on our social media accounts.

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Cristi Proistosescu @cristiproist.bsky.social · 9d

honestly I don't really mind writing the 15 page research summary (though 10 pages would be better for both writing and reviewing). It is, inter alia, a helpful conduit to plan out a project.

What kills me is the extra week(!) filling in tabs in research.gov, and ...

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Andrew Dessler @andrewdessler.com · 10d

the amount of time we spend trying to raise $$$ for our research is absolutely immense and results in a huge amount of wasted time. BUT there is a limited amount of money, so they have to have some method of distributing it. not sure what the best way to do it is.

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Fernando Pérez @fernandoperez.org · 18d

She's also committed to education and inspiring the next generation of scientists. She has volunteered to be a guest lecturer in several of my courses, and it will be a treat this year to have her discuss her work with my students in Stat159, who will then work on reproducing some of her research!

Fernando Pérez @fernandoperez.org · 18d

In 2023, she led NASA, then federal agencies, to make public, coordinated commitments to open science that were incredibly well thought out.

While open.science.gov doesn't resolve now, it was an example of how to guide policy to benefit all of science and society.

www.nature.com/articles/d41...

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Fernando Pérez @fernandoperez.org · 18d

Huge congratulations to NASA's @cgentemann.bsky.social for the #AGU2025 Open Science Recognition Prize!!! 🎉🎊🚀

Chelle has been a steadfast leader in open science, from data, to code, infrastructure, policy and education.

This could not be more highly deserved!

www.agu.org/honors-home/...

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Jason Williams @jasonwilliamsny.bsky.social · 19d

Please share with anyone who cares about NSF support for graduate students and take 30 seconds to sign and leave a comment.

The deadline for the 2025 Graduate Research Fellowship Program is about one month away and literally no one can apply. #NSFGRFP

jasonjwilliamsny.github.io/grfp2025/

An Open Letter to U.S. STEM Leadership on the NSF Graduate Research Fellowship Program

jasonjwilliamsny.github.io

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Kyle Cranmer @kylecranmer.bsky.social · 22d

Is scale all you need? Or is there still a role for incorporating domain knowledge and inductive bias? While I was in Heidelberg, I took some time to write a short essay on this question called "The Bittersweet Lesson".
theoryandpractice.org/2025/09/The%... #HLF25

Kyle Cranmer and Rich Sutton at the Heidelberg Laureate Forum, September 16, 2025.

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N. Thuerey's research group at TUM @thuereygroup.bsky.social · 28d

I'm very excited to introduce P3D: our PDE-Transformer architecture in 3 dimensions by . Demonstrated for unprecedented 512^3 resolutions! That means the Transformer produces over 400 million degrees of freedom in one go 😀 a regime that was previously out of reach: arxiv.org/abs/2509.10186

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Kyle Cranmer @kylecranmer.bsky.social · Sep 12

This is a cool tool that builds upon
UnicodeIt that @svenkreiss.bsky.social and I made forever ago. Open Source FTW!
www.unicodeit.net

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pyOpenSci @pyopensci.org · Sep 11

🚨 Call for editors! 🚨

We’ve got 3️⃣ new pyOpenSci packages ready for review:

✨ Phyleas (hardware security experiments)
✨ LSAPy (land suitability analysis w/ fuzzy logic)
✨ RSTT (sports simulation w/ probabilistic models)

Your expertise could help make scientific software stronger & more reusable.

Purple background with floral illustrations. Text reads: “Get involved with pyOpenSci! We’re growing our editorial team, and are seeking volunteers from a wide variety of scientific backgrounds. Editors: Lead the review process for 3–4 packages a year. Assist with editorial and peer review policies. People from diverse backgrounds are especially encouraged to apply! Questions? Email media@pyopensci.org. Apply: bit.ly/pyOSEditor.” At the bottom are social links: pyopensci.org, Fosstodon @pyOpenSci, LinkedIn pyOpenSci. Illustration shows a person at a desk on a video call with four people.

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Bob Kopp @bobkopp.net · Aug 26

Happy to be one of the initial signers of this @agu.org letter for climate change scientists to EPA stating unequivocally that greenhouse gases are causing harm. Scientists can sign on here:

Sign on to Defend EPA Peer-Reviewed Climate Science | WorkForms

From requests, feedback to data collection and more. Turn your insights into action with customizable WorkForms.

forms.monday.com

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Berkeley Institute for Data Science (BIDS) @ucbids.bsky.social · Aug 20

Stay tuned for the reports on the research presentations, panel discussions, and group visioning 📝 💡

re-ai.berkeley.edu/events/towar...

#ResponsibleAI #OpenSourceAI

three people standing side by side in front of a wall of Post-it notes with the text "the world we want!"

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Berkeley Institute for Data Science (BIDS) @ucbids.bsky.social · Aug 18

➡️👀 Check out the recently announced #JupyterCon schedule, with tutorials and talks from BIDS colleagues (@kirstiejane.bsky.social , @fernandoperez.org, Maryam Vareth) and several others from @ucberkeleyofficial.bsky.social.

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Berkeley Institute for Data Science (BIDS) @ucbids.bsky.social · Aug 14

Day 2 of the #GeoJupyter #Hackathon is under way at DSE (@schmidtdse.bsky.social)! Groups will gather and define challenges. The fun comes in when we start talking about solutions – thinking about tools and looking at other communities for inspiration 🤔💡

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Berkeley Institute for Data Science (BIDS) @ucbids.bsky.social · Aug 14

Day 1 wrapped up with thoughtful conversations and feedback, and with DSE and BIDS faculty director Fernando Pérez (@fernandoperez.org) providing a big-picture view of GeoJupyter & some laughs.

Stay tuned for more from this event!

#Geospatial #DataScience #Collaboration @geojupyter.bsky.social

5 people smiling, 2 seated and 3 standing, with 4 large windows in the background

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Fernando Pérez @fernandoperez.org · Aug 16

BTW, the train staff did the best they could in a difficult situation they were put in by @Amtrak. Those folks sitting in an office could have easily averted this mess, but chose not to.

Fernando Pérez @fernandoperez.org · Aug 16

You might want to talk to the coach passengers and Amtrak officials about the new "California Heat Stroke and Famine Express" experience!

Great way to revitalize interest in train travel!

Fernando Pérez @fernandoperez.org · Aug 16

. @DenverChannel @Amtrak @AmtrakCouncil, the Zephyr 6 arriving in Denver (ETA 9:47pm) is carrying coach cars full of people w/o adequate food since CA. Went to NV desert without AC and there's no Cafeteria car. A baby had to be evacuated into an ambulance at Winnemucca!

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Chris Holdgraf @choldgraf.com · Aug 8

Jupyter Community Workshops are back! Find a Call for Proposals and a description of our goals here:

blog.jupyter.org/jupyter-comm...

This one is for participants who are current or aspiring Jupyter contributors.

The CfP is open through Sunday, September 7th, 2025.

Jupyter Community Workshops Are Back!

The Jupyter Community Building Working Group is pleased to announce that the next call for proposals for Jupyter Community Workshops is now…

blog.jupyter.org

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Gus @gusbecker.bsky.social · Aug 8

Zines are a great tool for science communication. Earlier this year, I put one together with @kiricarini.com of @developmentseed.org.

The zine provides a visually interesting jumping off point for folks learning cloud-native geospatial data!

"Optimizing Geospatial Data for the Cloud"
"A zine exploring common formats"
"Development Seed"
"Gus Becker Kiri Carini"
A floating robot with one hand on a keyboard to a computer that has a glove on the screen. The other hand is giving a thumbs up.

A raccoon character asking about smoke data, and a floating robot describes how vector format may be more efficient than raster in some cases.

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Dr. Lucia Perez-Diaz @drlperezdiaz.bsky.social · Aug 5

Re-stock alert!
If you are based in the UK, and still don’t have a copy of my book “How the Earth works”, you can grab a signed/dedicated copy directly from my website!

Links here (also for shopping from outside the UK): www.hopp.bio/drlperezdiaz 🌍 ✨ ✏️

#SciArt #ScienceBooks

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