Hitoshi Nagasaki Motoei Azuma A Methodology for Assessing User's Skill Grade to Implement Adaptive User Interface Systems. 280-287 2002 conf/IEEEicci/2002 IEEE ICCI http://computer.org/proceedings/icci/1724/17240280abs.htm db/conf/IEEEicci/IEEEicci2002.html#NagasakiA02