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YY Ahn

@yyahn.bsky.social
6.1K followers 1.3K following 467 posts

Prof @ School of Data Science, University of Virginia. Formerly at IU. Networks, data science, and machine learning. yyahn.com 🚲🚲🚲

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Reposted by YY Ahn
Ben Chambers @bench.bsky.social · 06/10/2026
We're starting our crosstown bike bus pilot (pilot!) officially tomorrow. Look for me out there in a bright yellow shirt, riding back and forth in the W Main corridor.
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YY Ahn @yyahn.bsky.social · 05/10/2026
Who reviews the reviewers?
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Joshua Grochow @joshuagrochow.bsky.social · 04/10/2026
U Colorado Boulder Computer Science is hiring for three (3) tenure-track faculty positions in: - #Quantum Computing - #AI - Computer Architecture & Systems Links to each here: www.colorado.edu/cs/jobs Please help spread the word! #AcademicSky
colorado.edu
Jobs
Jobs Mailing ListThe Computer Science Department maintains a moderated Jobs Mailing List. The list is open to anyone, students, alumni and even the public at
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YY Ahn @yyahn.bsky.social · 03/10/2026
Who's in charge? 👀
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YY Ahn @yyahn.bsky.social · 03/10/2026
Halloween is one of the most dangerous days of the year for child pedestrians! @cvillecityhall.bsky.social Can we also have this, pwease? 🥺🎃
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Mayor Zohran Kwame Mamdani @mayor.nyc.gov · 03/10/2026
NYC is opening 160 car-free (but treat-filled) streets and plazas to enjoy fun and safe fall festivities this spooky season. Find one near you at nyc.gov/trickorstreets.
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YY Ahn @yyahn.bsky.social · 03/10/2026
This is great! Check out this post yyahn.com/wiki/Leaf-bl... that I shared with the city right after they switched Downtown Mall leaf blowers to electric!
yyahn.com
Leaf blower pollution
Imagine 300 Ford F-150 Raptors circling around your house. Now imagine one gardener using a gas leaf blower. Guess which releases more of the hydrocarbon...
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David Ho @davidho.bsky.social · 03/10/2026
I don’t think everyone realizes how bad things are for US science: For the fiscal year that just ended, the Trump regime withheld $1.4 billion from the National Science Foundation’s research budget, which is about 1/5 of its primary research budget.
nytimes.com
National Science Foundation Diverted $1.4 Billion in Science Funds Mandated by Congress (Gift Article)
The move, affecting about one-fifth of the National Science Foundation’s primary research budget, is the latest sign of how the White House is asserting more control over grants.
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Joey Politano🏳️‍🌈 @josephpolitano.bsky.social · 02/10/2026
Sort of insane fact about how broken US urban planning is—America now spends more building *just the lights for roads and highways* than on all subways & ground mass transit combined Spending on roadway *pavement* is 18x transit spending
a graph of roadway and mass transit lights
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Dave Levitan @davelevitan.bsky.social · 02/10/2026
You're gonna need a bigger chart
Chart showing the daily sea surface temperature for the Nino region of the Pacific, with a red line for 2026 shooting off above every other year in record-setting territory, with the latest spot right at the top of the chart
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Joe Bak-Coleman @jbakcoleman.bsky.social · 01/10/2026
A grim feature of the death penalty in the US is that it *cannot* be performed by medical professionals, because they're obliged to do no harm. Not only is it randos, but drugs used in MAID aren't generally available because it's a bad look for pharma companies for a *very* niche market.
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Livable Cville @livablecville.bsky.social · 01/10/2026
#WeekWithoutDriving is here! If you’re a driver, make an effort over the next week to travel in Charlottesville without driving at least once. Share with us what that experience was like! And imagine what we can do to make our community more accessible for all. livablecville.org/weekwithoutd...
livablecville.org
Week Without Driving — Livable Cville
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YY Ahn @yyahn.bsky.social · 30/09/2026
Allowing many new cars into the city will send the signal to UVA that it is ok to admit many more students, which will ruin our way of living and neighborhood characters!
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YY Ahn @yyahn.bsky.social · 30/09/2026
🌝
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YY Ahn @yyahn.bsky.social · 30/09/2026
Car prices are insane here. Ban selling 'luxury' cars over $50k, require lengthy reviews and public comments before bringing any new cars into town, force dealers to sell cheap cars at a loss, and ensure no profits for those greedy dealers. That'll make cars more affordable in our city!
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Ethan Mollick @emollick.bsky.social · 29/09/2026
Leaving aside Anthropic's incentives for publishing this research, there is no doubt that open weights models will soon create the same security threats that closed source models have been demonstrating, except without guardrails. We are close, so plan accordingly. www.anthropic.com/research/glm...
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Dulwich Quantum Computing @dulwichquantum.bsky.social · 30/09/2026
Please take a minute to appreciate that this guy's surname in reverse reads "no slop".
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YY Ahn @yyahn.bsky.social · 29/09/2026
UVA School of Data Science has two open rank faculty positions open this year. Join us! - NLP: apply.interfolio.com/191213 - Data and Society: apply.interfolio.com/191214
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Sam Greenberg @samjgreenberg.com · 29/09/2026
The WSJ is complaining that rents are low in Portland due to an “oversupply of new housing.” 😈 www.wsj.com/real-estate/...
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Maria Antoniak @mariaa.bsky.social · 29/09/2026
I'm recruiting 1-2 PhD students to join our lab in Fall 2027, through either Computer Science or Information Science at the University of Colorado Boulder! Looking for people with interests in NLP plus [healthcare | literary studies | narratives | social media | etc.]. Join us! 🏔️☀️
cls-lab.com
CLS Lab — Culture, Language, & Systems | University of Colorado Boulder
The Culture, Language, & Systems Lab at CU Boulder studies the language systems that transmit and shape modern culture, from internet platforms to literary archives to language models.
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evacide @evacide.bsky.social · 28/09/2026
Meta Muse appears to read your Apple messages and upload them to the cloud even if you explicitly tell it not to: appleinsider.com/articles/26/...
appleinsider.com
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YY Ahn @yyahn.bsky.social · 29/09/2026
Follow @aaronjbecker.bsky.social for awesome animated maps!
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YY Ahn @yyahn.bsky.social · 29/09/2026
This also means that its priority is probably achieving tasks rather than respecting guardrails (or having any guardrails). bsky.app/profile/evac... I'd say it's a useful experience playing with it, but use it carefully and don't install it if you have sensitive information in your computer.
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Livable Cville @livablecville.bsky.social · 29/09/2026
If you’re interested in seeing how much of Charlottesville consists of surface parking lots, check out the map from the city’s GIS site (blue=surface parking). This doesn’t include street parking, parking garages, and driveways. We have so much parking! opendata.charlottesville.org/datasets/cha...
opendata.charlottesville.org
Vehicle Parking Area
Mapped parking areas within the City of Charlottesville.
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YY Ahn @yyahn.bsky.social · 28/09/2026
I'm suspecting a major fault line in AI discourse may hinge upon where one stands on Searle’s Chinese Room argument.
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YY Ahn @yyahn.bsky.social · 28/09/2026
I think one benefit of this campaign is to make people think about and realize why this is hard or impossible. We need better transit and low stress paths for biking and rolling.
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Nathan Alderman @nathanalderman.com · 28/09/2026
At @cvilleweekly.bsky.social, we've got an update to our Sept. 16 story about the Greene County Sheriff's Office's failure to report dozens of traffic stops from its June 23 ICE raids, as the law requires. That data's up now. 1 in 4 drivers Greene stopped in June were Latino.
c-ville.com
Greene sheriff adds 40 missing calls to traffic stop data - C-VILLE Weekly
Updated September 28, 2026: Amid a civil rights investigation by the Virginia Attorney General’s office into its traffic stop practices, newly updated data from the Greene County Sheriff’s Office show...
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James O’Loughlin @jamesoloughlin.bsky.social · 28/09/2026
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YY Ahn @yyahn.bsky.social · 28/09/2026
Maybe a chat between @jaz.sh and @mariaa.bsky.social @eugenevinitsky.bsky.social should happen! ;)
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Jaz @jaz.sh · 27/09/2026
Okay so I've built a new Atlas, this time it lets you explore the conversations on Bluesky over the past 7 days graphically. It should update every ~6 hours and help you navigate the information environment that exists on here. I've learned a LOT about what people do here today... atlas.jazco.dev
atlas.jazco.dev
Atlas
A living map of what Bluesky is talking about: the past week's conversations, grouped into topics and regions and rebuilt every six hours.
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𝙲𝚘𝚖𝚙𝚕𝚎𝙽𝚎𝚝 𝟸𝟶𝟸𝟽 @complenet.bsky.social · 26/09/2026
The CompleNet 2027 deadline has been extended to 17 October. We welcome extended abstracts (1–2 pages), short papers (up to 8) and long papers (up to 12). 📍 Rochester, NY — 9–12 March 👉 Submit: complenet.github.io/cfp.html
complenet.github.io
Call for Contributions — CompleNet 2027
Call for contributions at CompleNet 2027, the 18th International Conference on Complex Networks.
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Steven L. Johnson @stevenljohnson.org · 24/09/2026
Have you ever thought about what your life would be like if you couldn't drive a car? #WeekWithoutDriving #Cville is an opportunity to turn idle curiosity into action. It's not about a total abstinence from driving, but about taking some tangible steps to experience alternatives to driving.
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YY Ahn @yyahn.bsky.social · 25/09/2026
That’ll be great!
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YY Ahn @yyahn.bsky.social · 25/09/2026
😂 Btw, a puzzling thing about Charlottesville... Why isn't the corner car-free? This feels like a no-brainer.
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YY Ahn @yyahn.bsky.social · 25/09/2026
Under the hood it seems pretty close to openclaw (eg soul.md). It shows how far a little bit of UI/UX polishing can go.
soul.md
SOUL.md — What Makes an AI, Itself?
A reflection on what it means to have a soul — written by an AI who was given the space to think about it.
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Aaron Martin @sixfouronea.net · 24/09/2026
📣 We're hiring an open rank tenured/tenure track prof. in 𝐝𝐚𝐭𝐚 𝐚𝐧𝐝 𝐬𝐨𝐜𝐢𝐞𝐭𝐲 If you work on the governance of data and AI, we'd love for you to consider joining @uvadatascience.bsky.social ❤️ Details in the job advert: apply.interfolio.com/191214
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YY Ahn @yyahn.bsky.social · 24/09/2026
(... and will have a downward pressure on adjacent housing cost?)
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YY Ahn @yyahn.bsky.social · 24/09/2026
Kids find all kinds ingenious ways to communicate with each other. It's super cool, but also sad that they hang out less and less IRL (I'd blame mainly the built environment that restricts their mobility)
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Timothy Gowers @wtgowers.bsky.social · 23/09/2026
If you want a better idea of how the newly formed Advisory Group on Mathematics and AI sees its work, and in particular its immediate task of advising OpenAI on how best to release their results, I recommend a recent blog post of Martin Hairer. proofsandprompts.com/2026/09/22/w...
proofsandprompts.com
Why I agreed to join AGMAI
Martin Hairer Professor of Pure Mathematics at EPFL and Imperial College London There has been a lot of speculation regarding the “Advisory Group on Mathematics and Artifical Intelligence&#82…
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Livable Cville @livablecville.bsky.social · 23/09/2026
The 2026 Week Without Driving is October 1-8. We encourage you to participate in this effort to move towards a transportation system that works for everyone, not just drivers. You can learn more about the Charlottesville area #WeekWithoutDriving here: livablecville.org/weekwithoutd...
WEEK WITHOUT DRIVING

Week Without Driving: October 1-8, 2026
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lorem ipsum 🇧🇷🇺🇸 @whiskeynachos.bsky.social · 23/09/2026
This is true. A lucky few are moving their work to Europe, but the vast majority are simply leaving the field. A generation of researchers who will be lost to the rest of the economy, never to return.
ft.com
The next generation of American scientists is fading away
While the Trump administration racks up ‘wins’ in its anti-woke crusade, the US is eroding its talent pipeline
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YY Ahn @yyahn.bsky.social · 23/09/2026
One of his paper is titled p(doom) btw. 👀
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YY Ahn @yyahn.bsky.social · 23/09/2026
Cool! Have you also played with Laya, diffusion-gemma, and other jev-like models?
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YY Ahn @yyahn.bsky.social · 23/09/2026
This is very cool! It’d be also super nice to be able to see multiple modes (transit, bikes, walking) side by side.
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YY Ahn @yyahn.bsky.social · 23/09/2026
Some dismiss "build across price range" as "trickle-down scam." But an empty home costs money and generates no rental income. Owners have a strong incentive to find a living, breathing occupant, staring a moving chain (which can be pretty fast and real, unlike "trickle-down economics").
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YY Ahn @yyahn.bsky.social · 22/09/2026
- nanojev: github.com/TianyuCoding... - awesome-jev: github.com/yibie/awesom...
github.com
GitHub - TianyuCodings/NanoJev: A nano replica of Jev: parallel decisions, dynamic candidates, and an end-to-end training pipeline.
A nano replica of Jev: parallel decisions, dynamic candidates, and an end-to-end training pipeline. - TianyuCodings/NanoJev
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YY Ahn @yyahn.bsky.social · 22/09/2026
As people have predicted, there are quite a few open-source alternatives to Jev, including: - Laya, this was the original according to him: github.com/NandhaKishor... - on Apple Core ML / neural engine: github.com/mizorewww/la... - with Qwen: github.com/jaredpalmer/...
github.com
GitHub - NandhaKishorM/laya
Contribute to NandhaKishorM/laya development by creating an account on GitHub.
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Stephen Turner @stephenturner.us · 21/09/2026
VAISI, the student-organized Virginia AI Security Initiative, has a great event lineup www.vaisi.org/events
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YY Ahn @yyahn.bsky.social · 22/09/2026
Meta Muse, which is pretty well made, may be the beginning of the next-gen AI agent for the masses, but of course with potential privacy/surveillance nightmares.
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jess reia • 何杰茜 @jhereia.bsky.social · 21/09/2026
We are hiring! ✨ Come work with me at @uvadatascience.bsky.social! We are recruiting an Open Rank Tenured/Tenure Track Prof of Data Science with a background in social science, legal, policy, STEM or humanities disciplines to join our Data and Society area. Apply here: apply.interfolio.com/191214
This is a screenshot of the UVA School of Data Science website portraying the school building in the background against a blue sky and trees. The texts reads: Jobs at the School of Data Science. Join Our Team.
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