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- Multi-Hued Kuggen Building (the Cog) Features A Rotating Photovoltaic Shade Screen Wed, 4 May 11, 1:10amRead the rest of Multi-Hued Kuggen Building (the Cog) Features A Rotating Photovoltaic Shade Screen Permalink | Add to del.icio.us | digg Post tags: "sustainable architecture", chalmers university, cog, cog building,...