Ⅰ. 서론
이동전화망에서의 궁극적인 진화방향은 위성을 포함한 범세계적인 IMT-2000라고 볼 수 있다. IMT-2000는 ITU에서 1978년 최초의 개념정립이 시작된 이후 1982, 1990, 1992년에 걸쳐 개념에 대한 보완작업이 진행되었다. 이는 급속히 발전하고 있는 통신기술은 물론 반도체 및 컴퓨터기술 등이 크게 반영
Sulfur Dioxide(SO2)
The release of SO2 to the atmosphere is the primary cause of acid rain in the world.
Fossil fuel combustion at electric power-generating plants accounts for about70% of
the emissions.
Coal, Oil, and all other fossil fuels naturally
contain some sulfur.
Volcanic eruptions are another more localized natural source of SO2
SO2 + OH. HSO3.
HS
2) Library as a cultural space
In the past, most people thought 'a library' is a place where people try to read books. However, libraries are changing considerably. We believe the library plays an important role in the society, as a cultural space. It is possible to guess this assumption with libraries around us.
First, we can assume that 'a library' becomes more creative place with
Blog of the library
- a tool providing services to users immediately
- Illinois Roselle Public Library
: support the book club through blog
- POSTECH (Pohang University) Library
: operate library marketing blog site
(http://postechlibrary.tistory.com)
upload library resources (books, journals, multimedia, electronic materials), library information service
General Education
There are a number of primary and high schools in the local area, many of which are educating the children of our staff. These schools are inadequately funded and require ongoing support.
Many of the children are orphaned and are inadequately cared for in terms of food and clothing; or are from very poor homes that cannot afford to pay school fees. The projects with which we h