About 40 specimens of fossil ophiuroids were collected from two formations of the Cenozoic marine deposits,Duho Formation and Hagjeon Formation, Pohang Basin,Korea.A few specimens were three-dimensionally preserved:mo...About 40 specimens of fossil ophiuroids were collected from two formations of the Cenozoic marine deposits,Duho Formation and Hagjeon Formation, Pohang Basin,Korea.A few specimens were three-dimensionally preserved:most of them were remained flattened and articulated.Although a gross morphology is well preserved in some specimens,the details such as disk shape and plates which are the most important diagnostic features were not observed.展开更多
Introduction Industrial tools using diamonds were first introduced in the Korean market about thirty years ago.In the beginning,diamond tools were primarily used in industries dealing with stone materials.Today,howeve...Introduction Industrial tools using diamonds were first introduced in the Korean market about thirty years ago.In the beginning,diamond tools were primarily used in industries dealing with stone materials.Today,however, they are focusing more on industrial tools than construction tools.The production trend of the展开更多
The Korea Atomic Energy Research Institute (KAERI) launched a nuclear hydrogen program to develop and demonstrate a hydrogen mass production system by 2019. The key feature of the system is to produce the hydrogen fro...The Korea Atomic Energy Research Institute (KAERI) launched a nuclear hydrogen program to develop and demonstrate a hydrogen mass production system by 2019. The key feature of the system is to produce the hydrogen from water using nuclear power. No fossil fuel (energy) will be used and no greenhouse gas will be emitted. The high temperature gas-cooled reactor (HTGR), which has high safety characteristics with competitive economy, is being developed to provide a high temperature heat (about 1000℃) requir...展开更多
文摘About 40 specimens of fossil ophiuroids were collected from two formations of the Cenozoic marine deposits,Duho Formation and Hagjeon Formation, Pohang Basin,Korea.A few specimens were three-dimensionally preserved:most of them were remained flattened and articulated.Although a gross morphology is well preserved in some specimens,the details such as disk shape and plates which are the most important diagnostic features were not observed.
文摘Introduction Industrial tools using diamonds were first introduced in the Korean market about thirty years ago.In the beginning,diamond tools were primarily used in industries dealing with stone materials.Today,however, they are focusing more on industrial tools than construction tools.The production trend of the
文摘The Korea Atomic Energy Research Institute (KAERI) launched a nuclear hydrogen program to develop and demonstrate a hydrogen mass production system by 2019. The key feature of the system is to produce the hydrogen from water using nuclear power. No fossil fuel (energy) will be used and no greenhouse gas will be emitted. The high temperature gas-cooled reactor (HTGR), which has high safety characteristics with competitive economy, is being developed to provide a high temperature heat (about 1000℃) requir...
