iiinova — where your digital self keeps evolving

YY Ahn @yyahn.bsky.social · 09/10/2026

Also abs link -> pdf is easy while pdf link -> abs page is not.

Drake meme with upper panel with arXiv link with pdf. Bottom panel with arXiv link with abs

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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 · 25/08/2026

Of course you'd expect massive congestion when you increase the road capacity by 4-5x. According to nacto, *dedicated* transit lane can carry ~5x more people than a car lane and ~4x more people than a car lane with frequent bus. "Not stuck in the traffic" is such a powerful upgrade for transit.

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YY Ahn @yyahn.bsky.social · 08/07/2026

This cartoon barely qualifies as satire. Is there any other engineering discipline with such a normalized disregard for human life?

A cartoon where a traffic engineer hears a news of child dying at the intersection they designed and then saying "don't scare me like that. I thought you were gonna trell me people were late for work"

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YY Ahn @yyahn.bsky.social · 13/04/2026

A fully packed cafe with three bikes locked in whatever metal rods available, empty car parking slots (no one drove). I’m not entirely sure whether this is a smart business decision… 👀

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YY Ahn @yyahn.bsky.social · 07/04/2026

So many people online right now

"They don't know" meme with text "they don't know i have been using obsidian wiki with AI agents". The captions on dancing couples: "Have you heard about obsidian" and "Karpathy LLM wiki is awesome"

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YY Ahn @yyahn.bsky.social · 24/03/2026

Why do local businesses have a *single* parking spot where you can have 10 instead?

10 bikes parked within a single car parking spot in front of a coffee shop.

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YY Ahn @yyahn.bsky.social · 16/11/2025

I see the point of the commentary but am not so sure about these examples... Isn't the PCA doing what it's supposed to do in these examples? (I often use "finding the most informative perspective to look at a fish" as an intuitive way to understand PCA.) www.pnas.org/doi/10.1073/...

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YY Ahn @yyahn.bsky.social · 24/10/2025

The system has just been turned on. This is so awesome to see! ☀️☀️☀️

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YY Ahn @yyahn.bsky.social · 14/10/2025

I'm excited to give a talk tomorrow at the Organizational Behavior Seminar series at the Stanford Graduate School of Business about modeling interconnected human beliefs. See you soon! www.gsb.stanford.edu/faculty-rese...

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YY Ahn @yyahn.bsky.social · 24/09/2025

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.

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YY Ahn @yyahn.bsky.social · 15/08/2025

I've moved! ❤️ → 🧡💙 "Hoosiers" - "sier" B → C & town → ville ... And the “smaller and smaller cities” streak lives on. Grateful for IU colleagues ❤️ and excited for new adventures at UVA School of Data Science, aka the "school without walls"! 🧡💙

A graphic for UVA School of Data Science with "A school without walls" at the center with UVA rotunda in the background.

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YY Ahn @yyahn.bsky.social · 15/08/2025

At Sunrise school (Charlottesville), but it's nothing special about this school, the parking lot and drop-off zone sprawl across as much space as the school itself. Yet, bike racks are in short supply and all the cars make it feel unsafe. If we want kids to walk/bike, we need to make it possible.

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YY Ahn @yyahn.bsky.social · 22/07/2025

🧪👋 I'm excited to join the standing committee on advancing science communication at the National Academies. Question for the hive mind: What concrete actions or “infrastructure” would most strengthen science communication right now? Where should our committee focus its efforts?

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YY Ahn @yyahn.bsky.social · 28/04/2025

The emergence of eukaryotes as an evolutionary algorithmic phase transition www.pnas.org/doi/10.1073/... "... was due to an algorithmic phase transition equivalent to that of certain search algorithms triggered by the constraints in finding increasingly larger proteins." A cool data collapse.

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YY Ahn @yyahn.bsky.social · 24/04/2025

A simple Keyboard Maestro script to change arxiv.org/pdf/xxxx to arxiv.org/abs/xxxx I should have set this up years ago... 🥲

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YY Ahn @yyahn.bsky.social · 23/04/2025

The *current* reinforcement learning methods may not be improving reasoning capacity of the LLMs. Instead, they may be training the models to find the shortcuts more efficiently. limit-of-rlvr.github.io

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YY Ahn @yyahn.bsky.social · 28/12/2024

arxiv.org/abs/2412.10924 - Tokens, the oft-overlooked appetizer: Large language models, the distributional hypothesis, and meaning. by Julia Witte Zimmerman et al. from 1Computational Story Lab at UVM Super fun figures!

"A condensed visualization of the content within instances of the “bank” token as it traveled through the RoBERTa MLM." - vectors depicted as islands in a navigation map.

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YY Ahn @yyahn.bsky.social · 14/12/2024

I think mass protests in Korea that draw millions always have strong festive elements. The song in the video: Han Chul Lee's "superstar": www.youtube.com/watch?v=N7gs... "괜찮아 잘될 거야 너에겐 눈부신 미래가 있어" “It’s okay, everything will work out. You have a brilliant future ahead of you.”

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YY Ahn @yyahn.bsky.social · 14/12/2024

"시위도 밥먹고" (Even protesters need to eat) crowd-sourced map for protest in Korea. Many volunteered to "pre-buy" thousands of drinks and other food items around the protest site so that protesters can eat/drink for free & the shops are supported during the protest. (+ restroom info) www.torchmap.kr

A screenshot of "torchmap.kr" that shows shops with pre-bought coffee and food

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YY Ahn @yyahn.bsky.social · 07/12/2024

For most of winter, handlebar mitts (pogies) and a skullcap (beanie) inside your helmet is all you need to bike around. #wintercycling is not a rocket science and you can bike outside if you can walk outside.

A hand holding a skull cap for bikes in front of an ebike with handlebar mitts.

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YY Ahn @yyahn.bsky.social · 12/09/2024

It seems like the "strawberry" model is here. openai.com/index/introd... It has been a pleasure everyone 🥲

"In our tests, the next model update performs similarly to PhD students on ..."

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YY Ahn @yyahn.bsky.social · 09/06/2024

Hey I made a visualization of the proposed Elon Musk pay package. yyahn.com/elon_paypack... Let me know what you think! 🙈 You can also suggest improvements: github.com/yy/elon_payp...

A screenshot of a webpage titled "pay package or rug pull? how much is too much?" It depicts the amount of money using rectangular boxes where each pixel height represents $10,000.

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YY Ahn @yyahn.bsky.social · 15/04/2024

The model gives us an intuitive way to think about simple v. complex contagion as well as vulnerability to mis/disinfo. When the existing belief system is "primed" to accept a certain belief, it can spread virally; when it conflicts with existing beliefs, social reinforcement is critical. 🧵8/

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YY Ahn @yyahn.bsky.social · 15/04/2024

This model can also reproduce the optimal modularity phenomenon. When the new belief is going against the existing belief system, the clustering matters more and there is an optimal amount of clustering that can spread the information best. 🧵8/

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YY Ahn @yyahn.bsky.social · 15/04/2024

It is also possible to reproduce the famous experiment by Damon Centola. When we have the "simple" configuration, it spreads better in a random network than a clustered "large world"; when we have the "complex" setting, it spreads better in the clustered large-world than a small-world! 🧵8/

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YY Ahn @yyahn.bsky.social · 15/04/2024

But, if new belief would disrupt a stable belief network, it will be difficult to be adopted. So, with belief weights, depending on the relationship between the new belief and the existing beliefs, the model exhibits two distinct dynamics: simple & complex contagion! 🧵7/

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YY Ahn @yyahn.bsky.social · 15/04/2024

We (w Nathaniel Rodriguez & Johan Bollen) introduced a simple model of belief interaction network in 2016: journals.plos.org/plosone/arti... In this model, beliefs are signed edges connecting concepts, which lead to the belief interaction via social balance condition. Another point was that .. 🧵3/

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YY Ahn @yyahn.bsky.social · 15/04/2024

Check out our new paper about belief & contagion dynamics led by Rachith Aiyappa! We show that both simple and complex contagion dynamics can emerge from a model of belief interaction network. In other words, simple/complex contagions may be just two sides of the underlying belief dynamics. 🧵1/

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YY Ahn @yyahn.bsky.social · 19/03/2024

This study estimated AI-usage in AI conference reviews not by trying to "detect" AI-written documents but by estimating the usage at the level of the whole corpus, with a convincing validation. Not a surprise: AI researchers are using GPT for reviews. arxiv.org/abs/2403.07183 ("commendable" 😂)

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YY Ahn @yyahn.bsky.social · 27/12/2023

A paper led by @dakotamurray.bsky.social Jisung Yoon, Sadamori Kojaku (and with Rodrigo Costas @wsjung.bsky.social, and Staša Milojević) in PNAS! 📖+🤖 → 🌌 ✈️🚊🚲🚶+🤖→🌌 Paper: www.pnas.org/doi/10.1073/... 1/

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YY Ahn @yyahn.bsky.social · 11/10/2023

and slow them down with good street designs. www.ite.org/technical-re...

The vehicle speed vs. pedestrian fatality rate. At 20mph, 10%, at 30mph, 40%, and at 40mph, 80%.

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YY Ahn @yyahn.bsky.social · 09/10/2023

Analogical prompting: arxiv.org/abs/2310.01714 Chain of thought: "Bro let's think step by step" Few-shot CoT: "Here's some tutorials. You got this." Analogical prompting: "why don't YOU make up some examples by yourself?"

Example prompts for zero-shot and few-shot chain of thought as well as the analogical prompting.

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YY Ahn @yyahn.bsky.social · 09/10/2023

RIP Mathpix (and others).

Kevin Yang's post "Impressive, wish I had this tool back in college" with a screenshot of ChatGPT session where GPT recognizes a hand-written equation and provides latex version of the equation.

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YY Ahn @yyahn.bsky.social · 15/07/2023

Is… is this what I think it is? Is this really a separated, protected bike lane upcoming next to a huge housing complex replacing a massive parking lot??? 😍 #bloomington

A road under construction, with what appears to be a protected bike lane. Multiple apartment buildings are being built behind.

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YY Ahn @yyahn.bsky.social · 13/07/2023

Wow. What an awesome team of ~~White & Asian dudes~~ AI researchers with probably impeccable judgement.

Elon Musk's xAI company homepage listing the 12 members of an all-male team.

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YY Ahn @yyahn.bsky.social · 09/07/2023

IPCC 리포트에서 가장 흥미로웠던 시각화! 각 대처 옵션별로 이게 탄소 배출을 줄이는데 얼마나 기여할 수 있고 얼마나 비싼 지를 한눈에 보여주는데 "carbon capture"의 경우 영향도 미미하고 아주 비싸죠. 반면 여기저기 보이는 파란색들은 하면 할수록 오히려 돈을 아낄 수 있는(!) 옵션들입니다. 태양열과 풍력이 단연 압도적이고 (이미 석탄보다 싸죠) 자동차 연비 올리기, 자전거 & 대중교통 늘리기등은 무조건 해야한다는... 그러려면 도로 좀 그만 만들고 그만 넓혀야 하는데 🥲 현실은 김건희 양평고속도로...

IPCC infographic on the potency and cost of mitigation options

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YY Ahn @yyahn.bsky.social · 28/06/2023

Here's my slides for the ICSSI conference method panel, where I discussed the usage of representation learning as an observational framework for conceptualizing the space of knowledge: yongyeol.com/slides/20230627_ICSSI_…

A slide with the blackhole image taken by the event horizon telescope, with the title "Can we observe a blackhole in the space of knowledge?"

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