Hirokazu Notsu Yoshihiro Okada Mina Akaishi Koichi Niijima Time-Tunnel: Visual Analysis Tool for Time-Series Numerical Data and Its Extension toward Parallel Coordinates. 167-172 2005 conf/IEEEcgiv/2005 CGIV http://doi.ieeecomputersociety.org/10.1109/CGIV.2005.79 db/conf/IEEEcgiv/cgiv2005.html#NotsuOAN05