1. Corporate Research and Development Center, Toshiba Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan.
2. Software Systems Research and Development Center, Toshiba Digital Solutions Corporation, 72-34 Horikawa-cho, Saiwai-ku, Kawasaki 212-8585, Japan.
3. ICT Solutions Division, Toshiba Digital Solutions Corporation, 72-34 Horikawa-cho, Saiwai-ku, Kawasaki 212-8585, Japan.