One of his designs is a pavilion featuring walls of “digital water"” (selected by Time magazine as one of the Best Inventions of 2007). Another is a proposed project called “The Cloud.” Made up of 400-foot towers holding a series of interconnected plastic bubbles displaying images and data, “The Cloud” will—if built—“float” over London's skyline. In his lecture, “Breaking Walls,” Ratti will focus on the use of transparent materials in architectural design. collapse [-]