an interactive facade installation consisting of a matrix of iris diaphragms (like those found in cameras) which open & close according to the external light. this reveals and obscures the inside of the building from the outside, and reflects the duration which people stand in front of the facade. [|via ]
information aesthetics.Where form follows data.
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see also jean nouvels iris facade on the institute of the arabic world ...
http://www.greatbuildings.com/buildings/L_Institut_du_Monde_Arabe.html