YY Ahn
@yyahn.bsky.social
5.7K followers 1.2K following 240 posts
Prof @ School of Data Science, University of Virginia. Formerly at IU. Networks, data science, and machine learning. https://yyahn.com 🚲🚲🚲
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Reposted by YY Ahn
stevenljohnson.org
👋🏽 Cville area peeps! Join us at the Livable Cville drop-in social at Ix Park Brazos Tacos from 5PM to 7PM+ at Ix Park Brazos Tacos. If it's your first time, your umpteenth time, or anywhere else in between, you are welcome!
Cheers. Livable Cville Meetup! Thursday, October 9, 5-7pm at Brazos Tacos Ix Art Park, 923 2nd St SE
Reposted by YY Ahn
cmyeaton.bsky.social
The government shutdown interrupted CDC's disease updates, so Team Force of Infection spent our Saturday going to the websites of all 50 health departments to check on Covid-19, flu and RSV. caitlinrivers.substack.com/p/cdc-data-i...
CDC data interrupted, so we went state by state
A look at Covid-19, flu and RSV trends in each state
caitlinrivers.substack.com
Reposted by YY Ahn
mariaa.bsky.social
This makes me so hopeful 🥹

Does anyone know of similar comparisons that focus on task-specific evals (like medical tasks)?
natolambert.bsky.social
A ton of attention over the years goes to plots comparing open to closed models.
The real trend that matters for AI impacts on society is the gap between closed frontier models and local consumer models.
Local models passing major milestones will have major repercussions.
buff.ly/ccMJydQ
Reposted by YY Ahn
chrislhayes.bsky.social
According to eyewitnesses, armed ICE agents dragged kids out of their beds in the middle of the night, zip tied them and put them in rented vans while raiding an * entire apartment building* on the South Side of Chicago.

www.youtube.com/watch?v=vOXO...
‘F--- them kids’: ICE agents drag children out of bed, ransack Chicago building
YouTube video by MSNBC
www.youtube.com
Reposted by YY Ahn
phillewis.bsky.social
Jane Goodall, ethologist and conservationist, has died. She was 91
Reposted by YY Ahn
mitsuhiko.at
“Is 90% of code going to be written by AI? I don’t know. What I do know is, that for me, on this project, the answer is already yes.” lucumr.pocoo.org/2025/9/29/90...
90%
AI is writing 90% of the code I was in charge of
lucumr.pocoo.org
Reposted by YY Ahn
aaronclauset.bsky.social
It took me 2 minutes to write about how this proposed rule would eliminate all foreign PhD students, who are a critical part of US science and technology, and drive US innovation and economic growth
Reposted by YY Ahn
dorialexander.bsky.social
And new paper out: Pleias 1.0: the First Family of Language Models Trained on Fully Open Data

How we train an open everything model on a new pretraining environment with releasable data (Common Corpus) with an open source framework (Nanotron from HuggingFace).

www.sciencedirect.com/science/arti...
yyahn.bsky.social
c-ville.com/car-light-fa... A nice article by @nathanalderman.com! It's awesome to see so many people biking in Charlottesville *despite of* pretty terrible infrastructure (@cvillecityhall.bsky.social 👀)

It reminds me of an old tweet that I can't agree more.
Reposted by YY Ahn
livablecville.bsky.social
As the seasons change, you might be wondering about biking in different weather conditions.

E-Bike Dad and Livable Cville member @yyahn.bsky.social wrote a very nice guide to biking in the cold weather months.

Check it out! yyahn.com/wiki/Bike/Wi...
Winter cycling - YY Ahn
yyahn.com
Reposted by YY Ahn
livablecville.bsky.social
The Week Without Driving starts a week from today!

For Charlottesville to have a transportation system that works for everyone, we need a collective vision that includes community members who cannot drive.

#WeekWithoutDriving seeks to expand that vision.

Livablecville.org/WeekWithoutDriving
WEEKWITHOUTDRIVING
September 29-October 5, 2025
PUBLIC TRANSIT • WALKING • BIKING
TAKE THE WEEK WITHOUT DRIVING CHALLENGE!

What would a Week Without Driving look like?

The Week Without Driving is a chance to see Charlottesville through the eyes of neighbors who already rely on walking, biking, and transit. Exploring these transportation options highlights both the connections they create and the gaps we need to address as a community.
Public transit and other connected mobility choices strengthen neighborhoods, bring people together, and open doors to opportunity. Together we can build a system that works for every age, ability, and income.
#WeekWithoutDriving
Livablecville.org/WeekWithoutDriving
yyahn.bsky.social
Hoboken cut traffic deaths to zero, thanks in part to paint & posts. So what’s the excuse? "we'd rather kill pedestrians than remove a parking spot”? “we’d rather kill pedestrians than slow traffic"?

This should be the bare minimum every city does. (@cvillecityhall.bsky.social 👀)
typewriteralley.bsky.social
Doing the Hoboken intersection daylighting tour today. It's actually embarrassing that Seattle isn't doing this at the same scale.
Intersection bulb out on a one lane street with two parking lanes Family with kid in stroller crossing street Someone on a bike approaching a daylighted intersection Wide daylighted intersection near a park
Reposted by YY Ahn
stevenljohnson.org
Hey folks, have you heard about #WeekWithoutDriving? Please join me for the local Cville area experience. Here's a link for more information and to signup: livablecville.org/weekwithoutd...
Week without driving from september 29 to october 5, 2025. public transit, walking, biking, take the week without driving challenge. For more information visit Livablecville.org/WeekWithoutDriving
Reposted by YY Ahn
shahanmemon.bsky.social
The 2025-2026 #academic job market season is upon us.

Here are some resources and #job postings for #faculty and #postdoc positions for those in Information/Computer/Social Sciences, and related fields.

Will update the list as more #jobs are posted.

🧵(0/n)

#AcademicChatter
yyahn.bsky.social
Indeed! I’m curious whether it will be possible to pinpoint what aspects of the ideas make them sound better but not fan out well…
yyahn.bsky.social
This study not only asks human experts to score AI- and human-generated ideas, but also to *execute* those ideas (a nice setup!)

AI-generated research ideas *sounded* better (high estimated effectiveness score) but their score drops below human ideas after the execution.

arxiv.org/abs/2506.20803
The Ideation-Execution Gap: Execution Outcomes of LLM-Generated versus Human Research Ideas
Large Language Models (LLMs) have shown promise in accelerating the scientific research pipeline. A key capability for this process is the ability to generate novel research ideas, and prior studies h...
arxiv.org
Reposted by YY Ahn
crenshaw-dev.bsky.social
@nat4cville.bsky.social spent 10min during the discussion about demolition of a historic house on Wertland Street to talk about the urgent need for affordable housing.

I clipped 6min of it. This is part 1/3.
Reposted by YY Ahn
b0rk.jvns.ca
when you learned Git for the first time, what resources did you use? Did you like them? Mostly looking for answers from folks who learned Git in the last 5 years or so.

Looking for resources to potentially add to the Git website
Reposted by YY Ahn
stephenturner.us
I just (re-)started the Charlottesville area R Users (CRU) group. If you're in the Charlottesville area come out to CRU's first in-person meetup Sep 24 at 6pm at the UVA School of Data Science. #Rstats

More info, and register (free) here: luma.com/9zespmac
First CRU meetup · Luma
Welcome to the inaugural Charlottesville R Users (CRU) meetup! In this first event we'll discuss the format and goals of CRU, followed by a short technical…
luma.com