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Implementing Universal Computation in an Evolutionary System
(2002-07-01)
Evolutionary algorithms are a common tool in engineering and in the study of natural evolution. Here we take their use in a new direction by showing how they can be made to implement a universal computer. We consider ...
Context-Based Vision System for Place and Object Recognition
(2003-03-19)
While navigating in an environment, a vision system has to be able to recognize where it is and what the main objects in the scene are. In this paper we present a context-based vision system for place and object ...
Shape Recipes: Scene Representations that Refer to the Image
(2002-09-01)
The goal of low-level vision is to estimate an underlying scene, given an observed image. Real-world scenes (e.g., albedos or shapes) can be very complex, conventionally requiring high dimensional representations which ...
The Role of Programming in the Formulation of Ideas
(2002-11-01)
Classical mechanics is deceptively simple. It is surprisingly easy to get the right answer with fallacious reasoning or without real understanding. To address this problem we use computational techniques to communicate ...
(Semi-)Predictive Discretization During Model Selection
(2003-02-25)
In this paper, we present an approach to discretizing multivariate continuous data while learning the structure of a graphical model. We derive the joint scoring function from the principle of predictive accuracy, which ...
Persistent Nodes for Reliable Memory in Geographically Local Networks
(2003-04-15)
A Persistent Node is a redundant distributed mechanism for storing a key/value pair reliably in a geographically local network. In this paper, I develop a method of establishing Persistent Nodes in an amorphous matrix. I ...
Generalized Low-Rank Approximations
(2003-01-15)
We study the frequent problem of approximating a target matrix with a matrix of lower rank. We provide a simple and efficient (EM) algorithm for solving {\\em weighted} low rank approximation problems, which, unlike simple ...
Multiple Resolution Image Classification
(2002-12-01)
Binary image classifiction is a problem that has received much attention in recent years. In this paper we evaluate a selection of popular techniques in an effort to find a feature set/ classifier combination which ...
Leveraging Learning and Language Via Communication Bootstrapping
(2003-03-17)
In a Communication Bootstrapping system, peer components with different perceptual worlds invent symbols and syntax based on correlations between their percepts. I propose that Communication Bootstrapping can also be ...
Swimming in Space-Time
(2002-11-01)
Cyclic changes in the shape of a quasi-rigid body on a curved manifold can lead to net translation and/or rotation of the body in the manifold. Presuming space-time is a curved manifold as portrayed by general relativity, ...