Professor Vincent Mosco, Canada Research Chair in Communication and Society at Queen's University, Alberta, will speak on "Knowledge Workers in the Global Economy: Here Today, Gone Tomorrow" April 22 at the University of Colorado at Boulder. The talk, at 2 p.m. in room 247 of the University Memorial Center, is the first de Castro Visiting Lecture to be hosted by the School of Journalism and Mass Communication's Global and International Media program and is free and open to the public. The CU-Boulder sociology department is co-hosting the talk.