Cell phone.
There are two types of DMB, Which is the ground wave DMB and satellite DMB. Ground wave DMB is a Digital broadcasting service that is transmitted through the transition tower on the ground and free watching service can be made possible. There are 6 firms in Korea, including Korean Broadcasting Networks who are in the business right now.
Satellite DMB is a charged satellite service t
In 1958, commercialization was
start by be used to Vanguard 1
satellite for power supply
In 1970, start enormous investment of commercialization and research
In 1977, development of amorphous solar cell
In 1991, invention of silicon solar cell mounted on the vehicle & start of the study about thin film pol
Ⅰ. 신경과 부교감신경
1. 뇌줄기(brainstem)
나온 부교감신경은 뇌신경의 일부인 동안신경(動眼神經)을 거쳐 눈에 이르고, 연수에서 나온 것 중 일부는 안면신경과 설인(舌咽)신경으로 들어가 눈물샘과 침샘에 분포한다. 연수에서 나온 굵은 부교감신경은 미주(迷走)신경이라 부른다. 미주란 라틴어의
or potential difference between the layers
No fuel cost or fuel supply problem
No pollution
High reliability
Small amount of power required
Depend on place and climate
Large scale:
Ocean navigation aid
Telecommunication system
Remote monitoring and control
Cathodic protection
Remote area(island, high mountain)
Earth-orbiting satellite
Space probe
Ⅲ. 통신응용 기술
● Sound Code(음파 내 데이터코드 인코딩 기술)
-기술소개 : 오디오 콘텐츠에 부가적인 데이터를 삽입해 스피커로 재생함으로써, 스마트 폰으로 해당 음파의 내용을 인식해 데이터를 검출 할 수 있는 음파 통신기술이다.
-특징 : 사람이 인식할 수 없는 신호를 보냄으로써, 스마트 폰
cell death가 관련되어 있음을 암시하는 것이다.
또한, 최근 일련의 연구에 따르면, 스트레스 환경에 노출시 뇌세포의 증식이 영향받을 수 있다는 증거가 제시되었다. 일반적으로 후각뉴론과 같은 조직을 제외한 성체의 뇌세포는 증식하지 않는 것으로 알려져 왔으나, 5-bromodeoxyuridine(BrdU)에 의한 염색실
Absorption: 외부에서 photon이 흡수되는 과정으로, semiconductor의 bandgap보다 큰 에너지를 가지는 경우에만 흡수 된다. 단 bandgap보다 너무 큰 경우는 auger electron을 생성하므로 실질적인 absorption을 일으키지 못한다.
Generation: absorption으로 electron이 excite 되면서 electron-hole pair가 생성된다
Separation: 이 두 carrier들
Voice and data access from remote places
Guarantee coverage in non-remote locations
Roaming between existing cellular systems and satellites systems
Key technological challenges of the wide commercial success
Accuracy, Ubiquity of service, Delivery of information instantaneously
LBS (location-based services)
Wireless mobile content services that provide location-specific infor
A. Limitations
So far we have seen a new approach of using stem cells for targeting cancer site and a new concept of
treatment. However it might seem fascinating, it is important to note that significant impediments remain
before the true potential of this novel therapy can be fully realized. Here in this section we are going to
mainly focus on the limitations of neural stem cells esp
Cell phone will be not ‘phone’. We predict common integration about all communication devices. If digital convergence still stand, so cell phone and TV and PC will be integrate one thing. These three devices are symbol of mobility, broadcasting, and internet. These have each characteristic, but, it stands for one same purpose, communication. Then, we think the advent of ‘Communicator’, th