This is what is looks like:
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James Clay
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Because social practice is dialogic, heterogeneous and distributed in functional systems, activity should be understood as laminated or layered in Goffman’s sense, and, following Goodwin and Duranti, as mutable, dynamic frames that are relatively foregrounded or relatively backgrounded. Thus, there are no spaces where the social histories of people, practices, artifacts, and institutions disappear, no pure monologic activity systems, no places where identities can be figured simply in terms offered by a dominant institution’s map (where a person is just an engineer, just a student, just a teacher). Lamination is not simply a notion of the multiple identities of the person, but also applies to mediational means, with heterogeneous histories embedded as affordances in the words, texts, tools, and institutions that mediate activity.
Prior, P. (2003). 'Are communities of practice really an alternative to discourse communities?'
Paper presented at the 2003 American Association of Applied Linguistics (AAAL) Conference
Accessed from: https://netfiles.uiuc.edu/pprior/Prior/PriorAAAL03.pdf
Those who criticise use of Twitter at work haven't seen the tectonic plates moving. Social networks such as these are the way businesses will be run in the future.
Victor Keegan Technology Guardian
http://www.guardian.co.uk/technology/2009/jan/29/twitter

Presentation available online at: http://www.slideshare.net/madrattling