info:oai:generic.eprints.org:1010info:ofi/fmt:xml:xsd:journalarticleRamduny-EllisD.DixAlanRaysonP.OnditiV.SommervilleI.RansomJ.272005-07Cognition, Technology & WorkArtefacts as designed, Artefacts as used: resources for uncovering activity dynamics76-87