YY Ahn

YY Ahn

@yyahn.bsky.social

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

5,945 Followers 1,244 Following 322 Posts Joined Jun 2023
1 day ago
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This NACTO/USDOT report addresses how to downsize fire trucks in cities. nacto.org/wp-content/u...

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3 days ago

If you are reviewing for IC2S2 and it gives you a headache from reading all 700+ paper titles/abstracts while bidding, I just built a tool for it. It uses an LLM to score how relevant each paper is to your research interests (you can define a list of keywords).

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3 days ago
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How to do peer review Reviewing papers has many benefits. We can learn about new research; the process of reviewing forces us to critically examine a paper, which is what we...

I wrote briefly about how to do peer review for students: yyahn.com/wiki/Peer%20...

Also includes some other advices from others including @jessicacalarco.com @robjhyndman.com Matt Might and so on.

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5 days ago
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Grammarly Is Offering ‘Expert’ AI Reviews From Your Favorite Authors—Dead or Alive The tool, offered by the recently-rebranded company Superhuman, gives feedback based on the work of famous dead and living writers—without their permission.

“Instead of producing what looks like a generic critique from a nameless LLM,” Wired reported last week, Expert Review “lists a number of real academics and authors available to weigh in on your text. To be clear: Those people have nothing to do with this process.”🤬

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6 days ago
A chart showing how the relative sizes of federal grant funding in the US, with arts and humanities getting an infinitesimal portion.

To offer some context, here's a graphic our fabulous intern Aidan Nuttall put together in 2023.

When we compared our per capita humanities research funding against 42 other countries, there was only a single country that spent less (South Africa), and most countries spent 10x-250x more.

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1 week ago

this is so fun because i know an LLM wouldn’t give me a response this creative. like this took the funniest shortcut possible. come have fun at youraislopbores.me

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1 week ago

(Polio. It's polio)

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1 week ago

Three scientists said no to you-know-who and were featured in the news (you may, somehow, be able to picture them). Nice. Good judgement.

But it's hard not to be cynical about this whole situation. (I'm resisting... resisting...)

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1 week ago
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Data Visualization A Practical Introduction

Here’s a full draft of the upcoming second edition of my “Data Visualization: A Practical Introduction”: socviz.co

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1 week ago
YouTube
My first science video in 3 years YouTube video by Physics Girl

This video makes me so happy! She’s back!

youtube.com/watch?v=B3m3...

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2 weeks ago
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Accessible PDF from LaTeX How to make LaTeX Curriculum vitae|CVs produce tagged, screen-reader-friendly PDFs -- relevant for ADA Title II compliance (deadline April 2026).

If you're unsure how to make your LaTeX-compiled PDFs (e.g., CV) accessible (compliant to the ADA requirements), this post may be useful.

yyahn.com/wiki/Accessi...

tl;dr: add metadata and use LuaLaTeX

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2 weeks ago
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NYU is hiring two postdocs at the Center for Social Media, AI & Politics:
csmapnyu.org/jobs

And a grant manager in Sociology with the Social Science Research Hub:
uscareers-nyu.icims.com/jobs/15327/g...

I'm part of both groups--please share with anyone who is interested!

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2 weeks ago
The snake that eats its own tail More automation, more babysitting

I created a tool, snaketail, a snakemake wrapper that fixes workflow and restarts itself automatically when failed.

The idea—feeding the tail (error log) to the head (system input) to self-heal—has practical values to create robust automation system!

skojaku.github.io/snaketail.html

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2 weeks ago

Ah.. no worries! Yes, that's frustrating part that to fix anything, you need to fix other things, and then to fix any of those other things, you need to fix yet other things, ...

But I do feel that having fire dept have some smaller fire engines and allow narrow streets can be an important step

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2 weeks ago
YouTube
How American Fire Departments are Getting People Killed YouTube video by Not Just Bikes

I think the video I linked was useful for me on that front... I think it's primarily a historical legacy of big fire engines becoming the standard while the highway engineering standards become the way cities design their streets too? www.youtube.com/watch?v=j2dH...

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2 weeks ago

yeah a great headline 😂

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2 weeks ago

It will be 3/4 6pm at CitySpace (100 5th St NE)!

www.charlottesville.gov/m/newsflash/...

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2 weeks ago

👀

www.404media.co/openai-furio...

futurism.com/future-socie...

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2 weeks ago
Event

Excited to join the panel "Innovation, Production, and Supply Chains in Critical Technologies" at CMU moderated by @andygarin.bsky.social and Erica Fuchs this Wednesday, 2/26 at 2pm! If you're in Pittsburgh, come say hi!

www.cs.cmu.edu/calendar/197...

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2 weeks ago

I'll look forward to the discussions sparked by this!

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2 weeks ago
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First blogpost of my cofounder post-Delhi on the deafening silence of public/political sphere as we come closer to another industrial revolution. anastasiastasenko.substack.com/p/the-countr...

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2 weeks ago
Using detailed address-level microdata, we trace movement chains originating with
the initial residents of The Central and document three main findings. First, we show
the building generated a substantial number of local vacancies. We identify 180 specific
addresses that became vacant because of moves into The Central. Scaling to account
for data coverage suggests the new tower induced more than 500 local vacancies in
the three years after construction, by setting off chains of moves. Second, while The
Central units were expensive on a per-square-foot basis, the homes vacated by movers
were significantly cheaper. Homes left behind by those moving into The Central were
about 40% less expensive. Unlike much of the prior literature, which track the changing
neighborhood characteristics of movers

Even more evidence that building new housing decreases rents: Researchers tracked the residents of a newly built luxury condo building and found that they freed up less expensive apartments nearby.
papers.ssrn.com/sol3/papers....

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2 weeks ago
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Together with @mrjimmyblack.com (and Claude) we developed a tool that helps detecting hallucinated references in academic papers! This evolved from a simple python script into a full system written in Rust to quickly go through thousands of citations. Check it out!

github.com/gianlucasb/h...

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3 weeks ago

the deadline to submit to the WiNS satellite & mentorship program at @netsciconf.bsky.social is this friday!!

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3 weeks ago
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Cost of car ownership One day, a PhD student mentioned the unexpected high cost of car repair—often over a thousand dollars, regardless of how cheap your car is. This got me...

Replacing a car with an e-bike can _literally_ make you a millionaire.

I wrote about a back-of-the-envelope math: a household can save ~$100k in just 5 years by going car-light. If this difference is invested over several decades, that can become $1M+

yyahn.com/wiki/Cost%20...

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3 weeks ago

We've alllllmost gotten all the Jan26 ARR reviews in, but I'm still trying to track down new emergency reviewers for papers on the following topics:
1) agents
2) jailbreaking
3) coding
4) RL
5) reasoning
6) LLM for finance
7) AMR
8) alignment
If you can review any (in next 24-48h) please DM me 🙏🙏🙏

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3 weeks ago

A very good visual explanation of colon cancer risk.

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3 weeks ago
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Happy to share our new paper published in PNAS!

Using epigenetic clocks and egocentric network data, we find each additional "hassler" in your close social network is associated with ~9 months of extra biological age and 1.5% faster pace of aging.

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3 weeks ago

A common but tedious task is to file a paper into my personal knowledge base (wiki/obsidian vault/whatever). just realized that this is a perfect task for subagent + skill. It can (1) use OpenAlex etc to obtain its metadata, (2) search and link keywords and other related papers. Seems to work well!

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1 month ago

Revision now posted on the ArXiv! We collated and cleaned EVEN MORE DATA. 39M accounts, 365K starter packs, and 2.4B following relationships. All accounts, follows, and starter packs now have timestamps! Check it out at arxiv.org/abs/2505.11608.

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