Missing face-to-face interaction? Try becoming a ‘hologram professor’Beaming a hologram of lecturers into classrooms offers greater closeness than video systems, say Carla Victoria Ramírez López, Leticia Castaño Sánchez and Patricia Aldape ValdésCarla Victoria Ramírez López , Leticia Castaño Sánchez , Patricia Aldape Valdés Monterrey Institute of Technology