Rüüg pile is heat-sensitive and changes color when it warms. When one friend walks, sits, or writes on their Rüüg, data from pressure sensors in the Rüüg is sent through a wireless internet connection to its Rüügmate. The grid of pixels underneath the Rüügmate’s Rüüg heat up the colorsensitive dye, radiating warmth and creating colorful representations of footprints, body prints, or writing in the Rüüg’s plush pile.
Source: Thompson, A., Friedland, A., and Cargiuolo, J. 2005. Rüüg: long-distance communication. In Extended Abstracts on Human Factors in Computing Systems (CHI’05). ACM Press, 1829–1832.
http://140.129.19.123/WIKILAB/index.php/R%C3%BC%C3%BCg_%E2%80%94_Long-Distance_Communication
