Author's Organization:Department of Geoenvironmental Sciences,Faculty of Science,Tohoku University CTI Engineering Co.,Ltd., Railway Information System Co.,Ltd., Department of Geoenvironmental Sciences,Faculty of Science,Tohoku University
Published: December 15, 1994Received: March 14, 1994Available on J-STAGE: April 11, 2008Accepted: October 11, 1994
Advance online publication: -
Revised: -