Tuesday, June 02, 2026

Less Drag

"A Fundamental Principle of Aeronautical Engineering Has Been Overturned"
Aiko Yakino, associate professor at Tohoku University's Institute of Fluid Science, and her research group were the first in the world to demonstrate that aerodynamic drag can be reduced by up to 43.6 percent simply by applying distributed micro-roughness (DMR), a surface roughness so fine and irregular that it cannot be distinguished by the naked eye. 
This technology is fundamentally different from the rivulet (“shark skin”) process, which is a known air-drag-reduction technology. The rivulet process mimics the fine longitudinal grooves in shark skin, and by carving grooves approximately 0.1 millimeter wide along the direction of airflow, it aligns the vortices that occur near the wall surface of turbulent airflow areas. DMR, on the other hand, delays the switch from laminar to turbulent flow by means of random and minute irregularities. The flow zones it affects and the mechanisms it employs are based on completely different concepts.

Our Latest Overlords

"Scientists Build a Living AI Device Using Real Brain Cells". (Via H.R.)

Monday, June 01, 2026

Do LLMs Need Sleep?

Maybe you don't want your LLMs to work 24/7: "Do Language Models Need Sleep? Offline Recurrence for Improved Online Inference".  Abstract: 

Transformer-based large language models are increasingly used for long-horizon tasks; however, their attention mechanism scales poorly with context length. To handle this, we study a sleep-like consolidation mechanism in which a model periodically converts recent context into persistent fast weights before clearing its key-value cache. During sleep, the model performs offline recurrent passes over the accumulated context and updates the fast weights in its state-space model (SSM) blocks through a learned local rule. During inference, this shifts extra computation to sleep while preserving the latency of wake-time prediction. We test our method on controlled synthetic tasks, including cellular automata and multi-hop graph retrieval, as well as a realistic math reasoning task, on which a regular transformer as well as SSM-attention hybrid models fail. We then show that increasing sleep duration for our models improves performance, with the largest gains on examples that require deeper reasoning. 

(Via S.S.)

Thursday, May 28, 2026

Fairer Chess?

I think my chess-playing friends will hate this idea: "Chess isn't fair -- so rearrange the pieces"

Tuesday, May 26, 2026

Encryption Update

EFF: "End-to-End Encrypted RCS Comes to Apple and Android Chats"

Now, those conversations can also benefit from the increased privacy and security that end-to-end encryption offers, making it so neither Google, Apple, nor the cellular carriers have access to the contents of messages. This feature comes courtesy of both Apple and Google supporting the GSMA RCS Universal Profile 3.0, which implements the Messaging Layer Security protocol for encryption. Metadata will likely still be collected and stored for these conversations, making alternatives like Signal still a better option for many conversations. Likewise, if you back up those conversations to the cloud, they may be stored unencrypted unless you enable Advanced Data Protection on iOS (Google Messages end-to-end encrypts the text of messages in backups, but not the media, so we’d like to see a similar offering as ADP on Android). Still, this is a significant step forward for the privacy of millions of conversations worldwide.

Monday, May 25, 2026

Rubber Band Magic

Danny Urbanus: "Penn & Teller FOOLED by a simple rubber band!" (Video, via Studio Neat.)

Tuesday, May 19, 2026