INTRODUCTION
As the world becomes increasingly connected, collaborative
work is often distributed across multiple locations. A
large number of commercial products are available to support
video-mediated communication and shared digital documents,
but many limitations for telepresence and telecollaboration
remain. Much co-located collaborative work focuses
on physical objects, surfaces, spaces and interpersonal relationships
that rely on physical interaction with other participants,
such as a handshake. The affordances of the physical
environment and presence of co-located collaborators are often
missing in screen-based remote collaboration.