“…Instead this research attempts to develop computational environments based on 'event propagation mechanisms' or similar for collecting, disseminating, and integrating information concerning cooperative activities (e.g., Fuchs et al, 1995;Syri, 1997;Prinz, 1999) or more comprehensive 'awareness models' based on a spatial metaphor (e.g., Rodden, 1996;Sandor et al, 1997) or the reaction-diffusion metaphor (e.g., Simone and Bandini, 1997).…”