I. Introduction
1. 실험 목적
온도 측정 실험에서는 고체면의 열전달률(heat transfer rate)를 촉진시키기 위해 사용되는 방법 중의 하나인 fin을 사용한 열전달량을 살펴봄으로써 열전달 이론에 대한 실제적인 이해와 적용을 할 수 있도록 한다. 이를 위해 구리 fin과 온도에 따라 색상이 변하는 액정(TLC : Thermo
spectralefficiency)는 사용자의 채널 측정을 피드백 한다.
- 빠른 피드백은 physical channel에 기인한다.
- CQI ( Channel Quality Indication )
- RSSI ( Received Signal Strength Indication )
받는 신호의 세기를 측정할 때 쓰인다.
Ranging” = 거리 측정
= 전파의 지연 측정과 송수신시의 로스 측정
( propagation delay & path loss )
= 업
Information System will be Virtual Reality (VR) meetings using computerized holographic projection, as these technologies have become available and is possibly being prepared and developed for mass marketing. As an obvious implementation of 3D Holographic Projection Technologies, virtual reality and spectral imaging will also be made available for sales presentations. By presenting the product
relatively high temperature, a nonradiative relaxation process
the transition probability per unit time, N :
By letting W by the luminescence probability, the luminescence efficiency h can by expressed as:
Incompletely filled 4 f shell
4 f orbital shielded from surroundings by the filled 5s2 &5p6 orbital
small influence of the host lattice to optical transition
efficiency of solar cell!!
◈ Reverse of current density(negative value)
at short-circuit state, when it receive the light.
◈ Jsc ∝ ηabs ηdiss ηout
(ηabs : the absorption efficiency of the materials
ηdiss : the efficiency of exciton dissociation
ηout : the collection efficiency of separated charge carriers)
◈ Sun light reflection s