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Lost Technology
2014131021 Takamitsu Sakai
What is Lost Technology?
It is the technology that has been lost by some kind of reasons in the present age
out-of-place-artifacts
Crystal skeleton →
There is the opinion it is the imitation.
Factor of the outbreak
A successor disappears, and a technique is lost.
The base of the technique disappear by an environmental change.
By development of different technology, it decline.
Old Japanese sword
"An old Japanese sword" means swords from the Heian era to the Sengoku era.
Mystery of the old Japanese sword
How do it was made?
History of the Japanese sword
Damascus steel
← Indian dagger using the Damasucus steel
Mystery of the Damascus steel
How do it was made?
Why is it hard to be rusted?
“Pillar of Delhi” in IndiaThis is said to be made of Damascus steel
The other Lost Technology
← Greek fire
Roman aqueduct →
Reference materials
http://ohmura-study.net/003.html
http://www.nittech.co.jp/M99/M9906.html
http://ja.wikipedia.org/wiki/%E3%82%AE%E3%83%AA%E3%82%B7%E3%82%A2%E7%81%AB%E8%96%AC