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Mark J. Nelson

@mm-jj-nn

Comp. sci. prof. @ American University, Washington DC. AI & games researcher with miscellaneous other interests. https://www.kmjn.org/

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Latest posts by Mark J. Nelson @mm-jj-nn

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Ex-Meta AI chief Yann LeCun's AMI raises $1.03 billion for alternative AI approach Advanced Machine Intelligence, the startup founded by former Meta Platforms chief AI scientist Yann LeCun, said on Tuesday ​it raised $1.03 billion based on a $3.50 billion pre-money valuation, as it ‌seeks to commercialize artificial intelligence systems built around reasoning, planning and "world models."

Ex-Meta AI chief Yann LeCun's AMI raises $1.03 billion for alternative AI approach reut.rs/4rxMzY4

10.03.2026 11:01 👍 14 🔁 8 💬 1 📌 4
ParaAdapt Workshop ParaAdapt: Parametric User Modeling & Adaptation for Navigating Complex Interactive Domains

We're running a workshop at ACM UMAP on parametric modeling and design for complex interactive domains (game PCG, data/AI interfaces, interactive installations, etc.). June 8 in Gothenburg (in-person). If you're interested, send in a 1-2 page blurb outlining a position, demo/tool, or case study!

10.03.2026 09:47 👍 1 🔁 2 💬 1 📌 0
a photograph of the hazy harbor in the evening looking west from Stenpiren

a photograph of the hazy harbor in the evening looking west from Stenpiren

happy to be back visiting the University of Gothenburg this week

09.03.2026 17:36 👍 10 🔁 0 💬 0 📌 0

Or any black-box optimizer for that matter – seems like something CMA-ES could also do well?

09.03.2026 14:23 👍 1 🔁 0 💬 0 📌 0
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Tenure Track Assistant Professor for Game Technology at IT University of Copenhagen The IT University of Copenhagen invites highly motivated individuals to apply for a Tenure Track Assistant Professor position starting in Au

Friends! The ITU is hiring! We're looking for a tech-savvy person who can help us develop the games program and the Center for Digital Play research profile: candidate.hr-manager.net/ApplicationI...
If you have any questions, please feel free to contact me!

09.03.2026 09:25 👍 15 🔁 11 💬 0 📌 0
a highway noise barrier viewed from a Silver Line train traveling in the median of the Dulles Access Road

a highway noise barrier viewed from a Silver Line train traveling in the median of the Dulles Access Road

nice day to ride the Metro

07.03.2026 20:35 👍 2 🔁 0 💬 1 📌 0

one of my undergrads asked me why "older people" end sentences with an ellipsis, especially the last sentence of an email

07.03.2026 19:47 👍 1 🔁 0 💬 1 📌 0

Not *exactly* the same question, but when talking with collaborators have been working out some tentative shorthand along the lines of: "let me show you what I have so far, the interface is obviously vibecoded but the model architecture and examples are artisanal".

07.03.2026 05:22 👍 5 🔁 0 💬 0 📌 0
The Washington Post describing Russia has having "exquisite intelligence capabilities".

The Washington Post describing Russia has having "exquisite intelligence capabilities".

The New York Times describing the U.S. military as having "large, exquisite unmanned systems".

The New York Times describing the U.S. military as having "large, exquisite unmanned systems".

Why are American journalists suddenly using the word "exquisite" in a weird, awkward way?

06.03.2026 21:10 👍 15 🔁 3 💬 4 📌 1
title slide reading:

Global Authoring in AI Drama Management
Mark J. Nelson
Computer Science Department & AU Game Center
American University, Washington, D.C.

title slide reading: Global Authoring in AI Drama Management Mark J. Nelson Computer Science Department & AU Game Center American University, Washington, D.C.

Also gave a guest lecture in his AI for Interactive Storytelling grad seminar, which was a good opportunity to trial a new talk.

06.03.2026 00:07 👍 7 🔁 0 💬 1 📌 0
photograph of the Rochester Airport outpost of the Strong Museum of Play arcade exhibit

photograph of the Rochester Airport outpost of the Strong Museum of Play arcade exhibit

Had a great short trip to the Rochester Institute of Technology. Thank you to @justusrobertson.bsky.social for hosting!

05.03.2026 23:39 👍 8 🔁 0 💬 3 📌 0

Donald Knuth asking Claude to update plan.md feels like some kind of time warp

03.03.2026 23:41 👍 92 🔁 12 💬 2 📌 0

There's a tile like this on each corner entrance and then names in the middle of the park. Richard Branson is the only one I saw in a quick walk past (was doing the Red to Silver transfer to Dulles so didn't have time to stop).

03.03.2026 21:16 👍 0 🔁 0 💬 1 📌 0
a photograph of a plaque on the ground reading "Jeffrey Epstein Walk of Shame"

a photograph of a plaque on the ground reading "Jeffrey Epstein Walk of Shame"

a new commemoration in Farragut Square

03.03.2026 21:11 👍 4 🔁 1 💬 1 📌 0

I wonder if some of that will end up automated by LLMs as a second order effect, not directly by LLMs but because LLM coding makes it cheap enough to finally automate stuff that *could* have been automated 20 years ago from a purely technical perspective. But hey, maybe not!

03.03.2026 19:34 👍 5 🔁 0 💬 1 📌 1

I'd be curious what he feels pressured by. Is it internal OpenAI disgruntlement or customers? (I doubt it's his own personal regrets.)

03.03.2026 14:14 👍 10 🔁 0 💬 1 📌 0
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At least it's an ethos? The limits of optimal control, from the maximalist and minimalist perspectives

The limits of optimal control, from the maximalist and minimalist perspectives.

02.03.2026 16:30 👍 14 🔁 2 💬 0 📌 1

Here's a tiny bit of hopium:

In 2024 we were planning on adding 160 GW of renewable energy to the grid by 2030.

As of the start of this year, we had added 100 GW and are planning on adding 220 GW more by 2030.

(In 2022 we planned for 60 GW in 2030. We hit that by the end of 2023)

03.03.2026 03:01 👍 67 🔁 11 💬 1 📌 1
What does a language model model? - Vaishnavh Nagarajan TL;DR: Does the next-token logit track the conditional or the joint probability of the whole sequence?I had an invisi...

A recent paper (arxiv.org/abs/2602.18671) made me question something basic: do the logits of a language model model the next-token or the full sequence distribution? It really messed with my brain (in a fun way!). I wrote about the paper to clarify my thinking.

vaishnavh.github.io/blog/joint-o...

03.03.2026 00:29 👍 14 🔁 3 💬 1 📌 5
Pushing the Frontier of Audiovisual Perception with Large-Scale Multimodal Correspondence Learning | Research - AI at Meta We introduce Perception Encoder Audiovisual, PE-AV, a new family of encoders for audio and video understanding trained with scaled contrastive learning....

I would've agreed a few months ago, but isn't Meta's PE-AV a pretrained audio model? It does have a multimodal aspect, but it's still purely an encoder, not an ALM.

02.03.2026 02:37 👍 1 🔁 0 💬 1 📌 0
Post image

It was all about spying on Americans: www.theatlantic.com/technology/2...

02.03.2026 01:33 👍 49 🔁 10 💬 2 📌 0

that's the WV part of Pittsburgh

28.02.2026 03:41 👍 2 🔁 0 💬 0 📌 0
Vol. 7 No. 1 (2026): Philosophy and the Mind Sciences, 2026 | Philosophy and the Mind Sciences Philosophy and the Mind Sciences (PhiMiSci) focuses on the interface between philosophy of mind, psychology, and cognitive neuroscience. PhiMiSci is a peer-reviewed, not-for-profit open-access journal...

A Special issue of Philosophy and the Mind Sciences on Representation in the Neurosciences and AI has just come out and it's full of cool papers: philosophymindscience.org/index.php/ph...

27.02.2026 22:00 👍 17 🔁 6 💬 1 📌 1

German academic job ads do this too! For some reason they insist on translating "Professor/Professorin" to "Professor (m/f)", to somehow reproduce the gendered German words in a language that doesn't have that. In recent years some then moved from "(m/f)" to "(m/f/a)" or "(any gender)".

26.02.2026 23:02 👍 1 🔁 0 💬 1 📌 0

Oddest experience so far as interim department chair. Received a letter from a California state prisoner addressed to the department (why Computer Science??). Inside, a hand-drawn diagram explaining how the Kennedy assassination really happened (the perpetrator: "G.H.W.B. CIA").

26.02.2026 22:53 👍 13 🔁 0 💬 1 📌 0
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Exploring Automated Distractor Generation for Math Multiple-choice Questions via Large Language Models Wanyong Feng, Jaewook Lee, Hunter McNichols, Alexander Scarlatos, Digory Smith, Simon Woodhead, Nancy Ornelas, Andrew Lan. Findings of the Association for Computational Linguistics: NAACL 2024. 2024.

Coincidentally I saw a talk about that a few weeks ago! Don't really know anything about this area other than the one talk, but it was based on this paper.

26.02.2026 19:24 👍 2 🔁 0 💬 0 📌 0

I guess technically the filament does sublimate, which contributes to the limited lifespan, but not sure that's what the cover designer was going for.

26.02.2026 14:35 👍 3 🔁 0 💬 0 📌 0
cover of the book Phase Transitions in Machine Learning

cover of the book Phase Transitions in Machine Learning

Pedantically annoyed by the cover of this book b/c the operation of an incandescent lightbulb does not really involve phase transitions.

26.02.2026 14:27 👍 15 🔁 0 💬 3 📌 0

Some of them are even taking and enjoying my AI class, so perhaps "anti-AI" is not exactly the right word, but you know what I mean.

26.02.2026 03:04 👍 6 🔁 0 💬 0 📌 0

I find virulently anti-AI programmers on the internet sort of annoying, but we have a minority of very anti-AI comp. sci. majors, and in that context it is totally fine to me, maybe even actively good.

26.02.2026 02:55 👍 18 🔁 0 💬 1 📌 0