For four weeks in Fall 2008, Mad. Sq. Art, the Madison Square Park Conservancy’s free outdoor gallery in Madison Square Park, will present Pulse Park, the U.S. debut of site-specific interactive light sculpture by internationally known electronic artist Rafael Lozano-Hemmer. This spectacular night-time installation introduces New York to the technological and artistic mastery of an artist whose large scale outdoor work has been on view in major cities worldwide. Pulse Park is the culmination of an interactive heartbeat series developed by the artist in recent years in Mexico City, Venice and …