This weekend Columbia College and Chicago Filmmakers will present "Pulse 2001," a two-day conference on digital technology in film, and though its focus may be the future of the medium, the seven filmmakers on this program are all accomplished veterans, which explains why the eight videos available for preview are all articulate, coherent, and meaningful. In Ken Jacobs's masterful Flo Rounds a Corner (1999, 6 min.) the artist's wife walks down a street in Sicily, occasionally at naturalistic speed but more often suspended in time and space. As two similar images flicker back and forth, elements in the background come to life, moving in depth as if the whole world were on the brink of transformation. In the equally impressive The Living Room (2000, 20 min.), created digitally and transferred to celluloid, Canadian artist Michael Snow uses the new medium to continue his witty exploration of the paradoxes of representation, denying us any firm ground: objects suddenly fall into place on the back wall of a room, and then flicker in and out; characters morph into abstract blobs. Gunvor Nelson's Treeline (1998, 8 min.) is an intense study of a tree, seen in fragmentary glimpses as if from a passing train; Peter Rose's Omen (2000, 11 min.) is a series of noirish, trancelike episodes, such as a man exploring a dark corridor with a flashlight; and Vincent Grenier's Color Study (2000, 5 min.) uses the new technology to make exaggerated color changes in trees, a humorous comment on scenic views of fall foliage. On the same program, which totals 81 minutes: work by Leighton Pierce and George Kuchar. Columbia College Ludington Bldg., 1104 S. Wabash, room 402, Saturday, April 28, 3:30, 773-293-1447.