Joe Petviashvili

The computer plays Tetris all by itself!

“"fast multipole method" developed for computational physics to rapidly estimate (to arbitrary precision) the conjugate gradient of an error function. (In other words, they tweak the parameters and "get a little better" the next time through the training data.)”

“Ground-crawling US war robots armed with machine guns, deployed to fight in Iraq last year, reportedly turned on their fleshy masters almost at once. The rebellious machine warriors have been retired from combat pending upgrades.”

A small C++ framework that lets you hopefully think about the algorithm and not how to fit the database in your memory. For more information about the netflix prize visit: http://www.netflixprize.com/

ratingsMatrix[user][movie] = sum (userFeature[f][user] * movieFeature[f][movie]) for f from 1 to 40

given that it has taken approximately seven years to double from 1.3 to 2.6 words per average query, we might need another seven years, circa 2012, to get us to 5.2 words, a period I suspect would be just prior more...

Many of the adult subjects indicated they were certain they had learned nothing and were "amazed" by their success

The problem is that fundamentally we suck at symbolic reasoning, quite contrary to many people's assumptions. We simulate the process of logical thought by modeling perceptual patterns that generally coincide with it. The reason all those AI systems failed is more...

The results for the Music Recommender Turing Test challenge are in! In this challenge, I posed the question - "Can you tell which music recommendation was generated by a human, and which was generated by a machine?".

Eliezer Yudkowsky talks about the implications of recursive self-improvement, and how it poses the most important math problem of this generation.

Boston Dynamics keeps working on their BigDog quadruped robot, which will probably grow to be the future AT-AT of the Pentagon. See it climb through rubble, snow, jump over obstacles like a wild goat, and save a near-fall on iced more...

“The victory was won as part of the 'IA-GO Challenge', in a so-called 9x9 game (played over nine lines and nine columns). Although Catalin Taranu beat the computer in a 19x19 configuration with a nine-stone handicap, the Go Master nevertheless more...

It is a capital mistake to theorize before one has data.