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- Mary-Anne Williams, Aidan Sims
- ArXiv
- 2000

SATEN is an object-oriented web-based extraction and belief revision engine. It runs on any computer via a Java 1.1 enabled browser such as Netscape 4. SATEN performs belief revision based on the AGM approach (Alchourrón et al 85). The extraction and belief revision reasoning engines operate on a user specified ranking of information. One of the features of… (More)

- AIDAN SIMS
- 2004

We produce a complete descrption of the lattice of gauge-invariant ideals in C(Λ) for a finitely aligned k-graph Λ. We provide a condition on Λ under which every ideal is gauge-invariant. We give conditions on Λ under which C(Λ) satisfies the hypotheses of the Kirchberg-Phillips classification theorem.

- AIDAN SIMS
- 2008

We define the relative Cuntz-Krieger algebras associated to finitely aligned higher-rank graphs. We prove versions of the gauge-invariant uniqueness theorem and the Cuntz-Krieger uniqueness theorem for relative CuntzKrieger algebras.

- A M Sims, T Stait-Gardner, +5 authors K Schindhelm
- Biomechanics and modeling in mechanobiology
- 2010

There is a scarcity of investigation into the mechanical properties of subdermal fat. Recently, progress has been made in the determination of subdermal stress and strain distributions. This requires accurate constitutive modelling and consideration of the subdermal tissues. This paper reports the results of a study to estimate non-linear elastic and… (More)

- Peter Lewin, Aidan Sims, PETER LEWIN
- 2009

We introduce new formulations of aperiodicity and cofinality for finitely aligned higher-rank graphs $\Lambda$, and prove that $C^*(\Lambda)$ is simple if and only if $\Lambda$ is aperiodic and cofinal. The main advantage of our versions of aperiodicity and cofinality over existing ones is that ours are stated in terms of finite paths. To prove our main… (More)

- Aidan Sims, Benjamin Whitehead, Michael F. Whittaker, Joachim Cuntz
- 2014

We introduce twisted relative Cuntz-Krieger algebras associated to finitely aligned higher-rank graphs and give a comprehensive treatment of their fundamental structural properties. We establish versions of the usual uniqueness theorems and the classification of gauge-invariant ideals. We show that all twisted relative CuntzKrieger algebras associated to… (More)

- Hui Li, David Pask, Aidan Sims
- 2014

We develop notions of a representation of a topological graph E and of a covariant representation of a topological graph E which do not require the machinery of C∗-correspondences and Cuntz– Pimsner algebras. We show that the C∗-algebra generated by a universal representation of E is isomorphic to the Toeplitz algebra of Katsura’s topological-graph… (More)

- Toke M Carlsen, Nadia S Larsen, Aidan Sims, Sean T Vittadello
- 2009

Let X be a product system over a quasi-lattice ordered group. Under mild hypotheses, we associate to X a C∗-algebra which is co-universal for injective Nica covariant Toeplitz representations of X which preserve the gauge coaction. Under appropriate amenability criteria, this co-universalC∗-algebra coincides with the CuntzNica-Pimsner algebra introduced by… (More)

- AIDAN SIMS
- 2008

Let E be a row-finite directed graph. We prove that there exists a C∗algebra C∗ min (E) with the following co-universal property: given any C∗-algebra B generated by a Toeplitz-Cuntz-Krieger E-family in which all the vertex projections are nonzero, there is a canonical homomorphism from B onto C∗ min (E). We also identify when a homomorphism from B to C∗… (More)

- A Sims
- The Western journal of medicine
- 1992