The Research on Concrete Applications for Sustainable Transportation (RE-CAST) University Transportation Center invites the campus community to a seminar at 12:30 p.m. Thursday, Sept. 25, in Room 209 Computer Science Building. Dr. Tyler Ley, associate professor and Williams’ Foundation Professor of Civil Engineering at Oklahoma State University, will present “Using the Super Air Meter to Evaluate Modern Air Entrained Concrete Mixtures.” For more information, email Abigayle Sherman.