Oliver Sacks, the well known neurologist and writer, published his fourth book, 'A Leg to Stand On', in 1984 following an earlier essay 'The Leg' in 1982. The book described his recovery after a fall in a remote region of Norway in which he injured his leg. Following surgery to reattach his quadriceps muscle, he experienced an emotional period in which his leg no longer felt a part of his body,...

What kinds of social organizations are used as resources when people communicate through talk in interaction? It is this question that conversation analysis attempts to answer. Conversation analysis (CA) studies the methods participants orient to when they organize social action through talk. It investigates rules and practices from an interactional perspective and studies them by examining rec...

We generalize standard Turing machines working in time ω on a tape of length ω to abstract machines with time α and tape length α, for α some limit ordinal. This model of computation determines an associated computability theory: α-computability theory. We compare the new theory to α-recursion theory, which was developed by G. Sacks and his school. For α an admissible ordinal, the basic notions...

valvular heart disease is a considerable finding in the antiphospholipid antibody syndrome (aps). the involvement of the mitral and aortic valves is more common in the form of leaflet thickening or aseptic verrucous vegetations called the libman-sacks endocarditis. in addition to the detrimental effects of endocarditis on the valves, it can lead to serious thromboembolic complications. here we ...

Article history: Received 12 February 2010 Available online 13 April 2010 Submitted by P. Sacks