YY Ahn

Professor at Indiana University Bloomington. Develops network, data, and machine learning methods and applies them to (mostly) social problems.

@yy@twitter is NOT my account.

2025-05-29

Another incredibly informative video about why speed limit doesn't work (but better road design works) by Justine Underhill (I can't understand how she only has 3k followers... 🤯)

youtube.com/watch?v=v6LIYQRgln

2024-12-29

yyiki.org/wiki/articles/2024/n

Neovim + zen mode + twilight for writing

2024-11-03

Check out our paper "Network community detection via neural embeddings" led by @sadamori (w Filippo Radicchi and Santo Fortunato)!
nature.com/articles/s41467-024

We argue that n2v can encode community structure down to the detectability limit due to its connection to spectral embedding.

YY Ahn boosted:

Excellent work. No edits.

2024-10-28

🔬 We're hiring a post-doctoral scholar!

Join us to study knowledge space, scientific funding, and scientific and technological progress! To see the details or to submit CV, research statement & references:

indiana.peopleadmin.com/postin

YY Ahn boosted:
2024-10-15

🚨Job alert!🚨

Come join us at the Inverse Complexity Lab! @invcomplexity

We’re hiring a post-doctoral researcher to join our group at IT:U, Linz, Austria.

skewed.de/lab/call.html

Deadline is 30 Nov 2024.

We are looking for an early-stage or more advanced postdoctoral scholar who is interested in building on our ongoing projects, or developing their own research agenda related to inverse problems in network science, complex systems modeling, and/or connections to machine learning.

This position is not bound to a particular research project, and the successful applicant will enjoy intellectual independence and freedom to choose research topics.

We’re seeking applicants with a background in Physics, Computer Science, Statistics, Applied Mathematics, or related fields, and with an interest in interdisciplinary research.

This position is guaranteed for 3 years. The gross salary range is € 66,532 to € 72,000 (indexed for inflation), depending on previous experience.

The employment conditions in Austria include completely free health care (also for family members), social security benefits, 25 days per year of paid vacations, flexible working hours, and possibility of home office.

In addition, IT:U will provide a KlimaTicket—a unified transport pass which gives free access to the entire transportation system in Austria, including trains and local public transport.

IT:U is a brand new public university in Austria, which began operations with its first cohort of professors in 2024, and is devoted to interdisciplinary research. It is co-located with the Johannes Kepler Universität in Linz, at the Science Park campus.

Linz is the third largest city in Austria with a population of 200k, centrally located only 1h15m away from Vienna by train, and short connections to Germany, Italy, and other neighboring countries.

For more information, see the call at skewed.de/lab/call.html

Spread the word!

#networkscience @academicchatter

2024-09-28

This paper looks like a nice guide for causal inference with instrumental variables. I haven't read whole thing closely yet, but it seems to go through each assumption and what happens if they are violated (not often exposed & explained well).

journals.sagepub.com/doi/full/

2024-09-20

“Typing” effect of LLM interface increases stereo”typing” via stronger anthropomorphism?

osf.io/preprints/psyarxiv/eqjs

YY Ahn boosted:
2024-09-19

Nice, our #Geospatial Data Science 🌐 course materials reached 500 stars on Github! ⭐🤩
github.com/mszell/geospatialda
We aim to update it yearly with new developments.

Infographic showing general course contents: · 1. Geometric objects · 2. Geospatial data in Python · 3. Choropleth mapping · 4. Spatial weights · 5. Spatial autocorrelation · 6. Spatial clustering · 7. Point pattern analysis · 8. OpenStreetMap and OSMnx · 9. Spatial networks · 10. Bicycle networks · 11. Individual mobility · 12. Mobility patterns · 13. Aggregate mobility and urban scaling · 14. Sustainable mobility and geospatial epidemiology ·
YY Ahn boosted:
2024-09-02

Filipi Silva introduces GPU-powered drag & drop network embedding and visualization tools
#Rep4CS #CCS2024

YY Ahn boosted:
2024-09-02

Sadamori opens the Rep4CS satellite
#CCS2024

YY Ahn boosted:
2024-09-02

Windshield Bias, Car Brain, Motornormativity: Different Names, Same Obscured Public Health Hazard findingspress.org/article/1229

YY Ahn boosted:
Elize Hendriks 🍋elizemanis
2024-08-30
YY Ahn boosted:
Flock of Cats 🐈 🐈 🐈 🌧️FlockOfCats@famichiki.jp
2024-08-30

Never forget what they’ve taken from you

An image depicting a wavy, accordion-folded strip of paper lying on a wooden surface, alongside a straight strip of dot matrix printer scrapwith evenly spaced circular holes. A pen is partially visible in the background.
YY Ahn boosted:
nixCraft 🐧nixCraft
2024-08-30
I'm old enough to remember when a computer didn't automatically connect to the internet, it used to make a screaming noise. We should have listened.
YY Ahn boosted:
2024-08-29

1/ Americans have access to 4.2 million miles of public roads, including an interstate system that was completed in 1992, that can generally carry us anywhere we might like to go. And yet, expensive and disruptive highway construction continues. https://slate.com/business/2024/08/construction-traffic-cars-driving-transportation-highway.html

YY Ahn boosted:
2024-08-29

Bike Theft Discourages People From Riding Bikes. These Bike Parking “Pods” Can Help. https://nextcity.org/urbanist-news/oonee-black-startup-secure-bike-parking-nyc

2024-08-28

Cerebras inference can generate 450 tokens per second for Llama3.1 70B model 😵: cerebras.ai/blog/introducing-c

How can they do the LLM inference so quickly?

They are making a HUGE chip ("wafer-scale engine" - one chip from one wafer) that contains close to 1M (!) cores specialized to perform sparse linear algebra operations.

youtube.com/watch?v=f4Dly8I8lM

2024-08-28

The shoe size system is maddening, especially for a man with small feet... Toddler, small kids, big kids, men, women, ... The number doesn't contain any information!

How about using freaking cm for both length and width?

YY Ahn boosted:
2024-08-28

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