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February 2022
Nature 602, 223-228
Wurman, P.R., Barrett, S., Kawamoto, K. et al.
Sony AI used Reinforcement Learning to train an AI agent capable of beating some top human players at the car racing game Gran Turismo.
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May 2010
Ph.D. Thesis at UC Berkeley, May, 2010
Leon Barrett
I present a computational architecture designed to capture certain properties essential
to actions, including compositionality, concurrency, quick reactions, and resilience in the face
of unexpected events. It uses a structured internal state model and complex inference about
the environment to inform decision-making. The properties above are achieved by combining
interacting procedural and probabilistic representations, so that the structure of actions is captured
by Petri Nets, which are informed by, and affect, a model of the world represented as a Probabilistic
Relational Model. I give both a theoretical analysis of the architecture and a demonstration of its
use in a simulated robotic environment.
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September 2008
Neural Computation, Vol. 20, No. 9: 2361-2378
Leon Barrett, Jerome Feldman, and Liam Mac Dermed
We propose a mechanism for binding and automatic inference in humans that does not rely on temporal synchrony. An
online example and demo is available.
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July 2008
ICML 2008
Leon Barrett and Srini Narayanan
We give an algorithm for learning all optimal policies when performing reinforcement learning with multiple rewards.
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May 2006
ICSI Tech Report TR-06-001
Leon Barrett, Jerome Feldman, and Liam Mac Dermed
We propose a mechanism for binding and automatic inference in humans that does not rely on temporal synchrony. An
online example and demo is available.
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2006
in ACL
Slav Petrov, Leon Barrett, Romain Thibaux, Dan Klein
Automatically learning more informative grammars gives grammars that capture linguistic features and also gives high parsing accuracy; we got an F1 score of 90.2.
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2006
in CONLL
Slav Petrov, Leon Barrett, Dan Klein
We examine parsing text by using a hierarchical mixture of grammars. This helps capture non-local correlations, but unfortunately these make up a small amount of all correlations to be captured.
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November 2005
in Graphite
Leon Barrett, Patrick Coleman, Nisha Sudarsanam, Karan Singh, and Cindy Grimm
My first published paper! Automatic camera placement and multiple-camera interpolation, with Cindy Grimm and others.