Basic → State-of-the-art Materials
`휴대폰 소재의 진화` 어디까지…
'스칸듐,탄소섬유,강화유리,옥수수 전분까지….'
휴대폰 소재가 진화하고 있다. 지금까지 휴대폰 외장재는 가공이 편리하고 색상 구현력이 뛰어난 플라스틱이나 알루미늄 합금 등이 주로 쓰였다. 하지만 외부 충격에 약하다는 단점
1. Listening Comprehension
1~3) Listen to the following and answer the question.
Pre-history
Prior to the release of bitcoin there were a number of digital cash technologies starting with the issuer based e-cash protocols of David Chaum and Stefan Brands. Adam Back developed hashcash, a proof- of-work scheme for spam control. The first proposals for distributed digital scarcity based cryp
나는 스페인 남부의 Estepona라는 공동체에서 자랐다.내가 16살이었던 어느 날 아침,아버지는 내가 Mijas라는 18 마일의 거리의 멀리 떨어진 마을에 차를 통해 자신을 대려가는것을 허락했는데, 그 마을 주변의 창고에서 차를 서비스받는다는 조건하에서였다.운전을 이제 막 배웠음에도 차를 사용할수 있는
3D printing
3D printing or additive manufacturing (AM) refers to any of the various processes for printing a three-dimensional object. Primarily additive processes are used, in which successive layers of material are laid down under computer control. These objects can be of almost any shape or geometry, and are produced from a 3D model or other electronic data source.
Basic principles
If the
1. Introduction
In Aug. 2012, Korean government presented a list of universities with poor performance. If a university is selected as a poor performance university, the government will stop giving financial support to the university. Also, students in the universities will not be able to get national scholarship from the government. The government evaluated all the universities in Korea accordi