Selected papers of the Second Workshop on Concurrency and compositionality
Populating the application: a model of awareness for cooperative applications
CSCW '96 Proceedings of the 1996 ACM conference on Computer supported cooperative work
Compositional features for promoting awareness within and across cooperative applications
GROUP '97 Proceedings of the international ACM SIGGROUP conference on Supporting group work: the integration challenge
Simple Computation-Universal Cellular Spaces
Journal of the ACM (JACM)
Dynamics of complex systems
Future Generation Computer Systems
Integrating Awareness in CooperativeApplications through the Reaction-DiffusionMetaphor
Computer Supported Cooperative Work
Programming Environments for Cellular Automata
ACRI '96 Proceedings of the Second Conference on Cellular Automata for Research and Industry
A spatial model of interaction in large virtual environments
ECSCW'93 Proceedings of the third conference on European Conference on Computer-Supported Cooperative Work
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The main aim of this paper is to present the formal description of the Multilayered Reaction-Diffusion Machine (MRDM, an extension of a previously introduced RDM, Reaction-Diffusion Machine) which can be seen as a generalization of Cellular Automata since it relaxes some constraints on uniformity, locality and closure. The MRDM offers a formal and computational environment where to describe, represent and simulate coordination models which explicitly require spatial features to be considered and integrates different forms of interaction. The paper is divided into two main parts. In the first one, the formal description of the MRDM is presented. In the second part the MRDM is put in relation with deterministic Turing machines; moreover we show how the MRDM, under determined constraints, collapses on a traditional CA.