arches
쐐기 모양의 돌이나 벽돌을 쌓아 올림으로써 이루어지는 것을 특히 조적아치라 하며 이것이 아치의 기본적인 형이다. 철을 사용하였을 때 케이블 시스템을 거꾸로 한 경우 이고 케이블 시스템을 거꾸로 하면, 케이블의 인장 응력과 크기가 같은 압축 응력이 작용하는 원리의 시스템을 뜻한다. 상
History
In 1907 H.J. Round found photo emission phenomena
In 1923 found injection luminescence from SiC
In1962 GE developed semiconductor LED
-> Red color LED become commercialized by GaAsP
In 1970s developed all color of LED except blue color
In the middle of 1990s developed blue color LED in Japan
->All natural color developed
In 2000s
-White LED be used widely
-Energy cut down rema
돔
(1)정의:
돔은 건축 용어로 빌리자면 반구형(半球形)으로 된 지붕이나 천장을 말하는데 이는아치에서발전된 반구형 건물 구조체로서 원형 ·육각 ·팔각 등의 다각형 평면 위에 만들어진 둥근 곡면의 천장이나 지붕을 말한다.특히 작은 것이나 소탑 끝에 있을 때는 큐폴라(cupola)라고 한
Structure
1) ‘Business Identity’ has become vague due to the businesses’ diverse strategy for change which had lead to homogeneity between the businesses with no particular differences
• Exclusively choosing to combine the strong points of different businesses without clearly bordering the differences between industries like the developed countries has lead to businesses with identi
Ⅰ. Introduction
1) Location
Russia is located in the north Eurasia continent (Far East Asia ~ Europe). Russia is the largest country in the world which is about 1/8 of the world’s land area. Because of this huge territory, there is an 11-hour time difference between East and West.
2) Climate
The huge territory of Russia also makes a various climate zone. Basically, Russia has continental