1. (1) Highway Statistics Annual Report : Status investigation on road facilities, Japan Ministry of Land, Infrastructure, Transport and Tourism (2005)
2. (2) Earthquake Database, Japan Meteorological Agency, Available: http://www.jma.go.jp
3. (3) Kyushu Bureau of Economy, Trade and Industry, Available at http://www.kyushu.meti.go.jp/report/1003_inove/inove_all.pdf, p. 4
4. Time-synchronized Wireless Strain and Damage Measurements at Multiple Locations in CFRP Laminate Using Oscillating Frequency Changes and Spectral Analysis
5. (5) D. Pines and A. E. Aktan : “Status of structural health monitoring of long-span bridges in the United States”, Prog. Struct. Engng Mater., Vol. 4, pp. 372-380 (2002)