title: Announcement: in memory of Irwin Oppenheim.
authors.affiliation: American Physical Society.
authors.forename: Gene D
authors.initials: GD
authors.lastname: Sprouse
authors.affiliation: Physical Review E.
authors.forename: Eli
authors.initials: E
authors.lastname: Ben-Naim
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D010506:Periodicals as Topic; D010825:Physics / Q000266:history*; D014481:United States