Outputs (1078)

Linear and nonlinear wave propagation in coated or uncoated elastic half-spaces (2007)
Book Chapter
(2007). Linear and nonlinear wave propagation in coated or uncoated elastic half-spaces. In Waves in Nonlinear Pre-Stressed Materials (103-127)

In these lectures, we discuss three closely related topics. We first discuss derivation of the nonlinear evolution equation for surface acoustic waves and show that all known methods of derivation should and do give the same evolution equation. We th... Read More about Linear and nonlinear wave propagation in coated or uncoated elastic half-spaces.

A note on perturbation formulae for the surface-wave speed due to perturbations in material properties (2007)
Journal Article
(2007). A note on perturbation formulae for the surface-wave speed due to perturbations in material properties. Journal of Elasticity, 187 - 192. https://doi.org/10.1007/s10659-007-9130-4

In a recent paper by Tanuma and Man, a two-term asymptotic formula was derived for the speed of surface waves propagating in an anisotropic elastic half-space whose elastic moduli differ only slightly from those for a (base) isotropic elastic materia... Read More about A note on perturbation formulae for the surface-wave speed due to perturbations in material properties.

A coarse-grained spectral signature generator (2007)
Presentation / Conference Contribution
Lam, K., Austin, J., & Day, C. (2007, May). A coarse-grained spectral signature generator. Presented at Eighth International Conference on Quality Control by Artificial Vision, Le Creusot, France

This paper investigates the method for object fingerprinting in the context of element specific x-ray imaging. In particular, the use of spectral descriptors that are illumination invariant and viewpoint independent for pattern identification was exa... Read More about A coarse-grained spectral signature generator.

On the membership of invertible diagonal and scalar matrices (2007)
Journal Article
Bell, P. (2007). On the membership of invertible diagonal and scalar matrices. Theoretical Computer Science, 37 - 45. https://doi.org/10.1016/j.tcs.2006.11.011

In this paper, we consider decidability questions that are related to the membership problem in matrix semigroups. In particular, we consider the membership of a given invertible diagonal matrix in a matrix semigroup and then a scalar matrix, which h... Read More about On the membership of invertible diagonal and scalar matrices.

Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments (2007)
Journal Article
Channon. (2007). Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments. Lecture notes in computer science, 345 - 354. https://doi.org/10.1007/978-3-540-74913-4_35

Both reactive and deliberative qualities are essential for a good action selection mechanism. We present a model that embodies a hybrid of two very different neural network architectures inside an animat: one that controls their high level deliberati... Read More about Neuroevolution of agents capable of reactive and deliberative behaviours in novel and dynamic environments.

Infinity (2007)
Book Chapter
(2007). Infinity. In Philosophy of Logic, vol. 5 of the Handbook of the Philosophy of Science (523 -585)

This essay surveys the different types of infinity that occur in pure and applied mathematics, with emphasis on: 1. the contrast between potential infinity and actual infinity; 2. Cantor's distinction between transfinite sets and absolute infinity; 3... Read More about Infinity.

Visualising multidimensional signals from a dimension-dependent computational perspective (2006)
Presentation / Conference Contribution
Lam, K., & Austin, J. (2006, December). Visualising multidimensional signals from a dimension-dependent computational perspective. Presented at IEEE - International Conference on Signal and Image Processing (ICSIP), Hubli, India

Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment (2006)
Journal Article
Channon. (2006). Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment. Genetic Programming and Evolvable Machines, 253 - 281. https://doi.org/10.1007/s10710-006-9009-3

Bedau et al.'s statistical classification system for long-term evolutionary dynamics provides a test for open-ended evolution. Making this test more rigorous, and passing it, are two of the most important open problems for research into systems of ag... Read More about Unbounded Evolutionary Dynamics in a System of Agents that Actively Process and Transform Their Environment.

The N-strikes-out algorithm: A steady-state algorithm for coevolution (2006)
Journal Article
Channon. (2006). The N-strikes-out algorithm: A steady-state algorithm for coevolution

We introduce the N-strikes-out algorithm, a simple steady-state genetic algorithm for competitive coevolution. The algorithm can be summarised as follows: Run competitions between randomly chosen individuals, keep track of the number of defeats for e... Read More about The N-strikes-out algorithm: A steady-state algorithm for coevolution.

Analysing co-evolution among artificial 3D creatures (2006)
Book Chapter
Channon. (2006). Analysing co-evolution among artificial 3D creatures. In Lecture Notes in Computer Science (167 -178)

This paper is concerned with the analysis of coevolutionary dynamics among 3D artificial creatures, similar to those introduced by Sims (1). Coevolution is subject to complex dynamics which are notoriously difficult to analyse. We introduce an improv... Read More about Analysing co-evolution among artificial 3D creatures.