2005-03-25 回転ドアの失敗学 interest http://slashdot.jp/journal.pl?op=display&uid=3459&id=288427&light=1&theme=slashdotjp http://www.academyhills.com/school/toshijuku/symposium/sym2.html http://www3.nhk.or.jp/omoban/main0327.html#03