Advanced visual interfaces supporting artificial intelligence and big data applications : AVI 2020 Workshops, AVI-BDA and ITAVIS, Ischia, Italy, June 9, 2020 and September 29, 2020 : revised selected papers - Reis, Thoralf; Bornschlegl, Marco X.; Angelini, Marco; Hemmje, Matthias L. (Information systems and applications, incl. Internet/Web, and HCI, 2021)