Water-soluble material-shaving aid material
Molecular weights 에 따라Liquid 또는 low-melting solid 상태로 존재
Physical Properties
Tg= -67oC
Low toxicity
Non-Toxic
의약품, 스킨로션 등
기계적 성질이 안 좋아서 다른 고분자나 이온성 물질과 blend 또는 합성하여 사용
Glass Transition Phenomena
액체를 냉각할 때 물질 고유의 온도
2.4. Bonjean Curve
많은 학생들이 Bonjean Curve 에 대해 답을 하지 못하였다고 하셨다. 우리 조원들도 이 문제에 대해 거의 답을 하지 못하였다고 했다. Bonjean Curve는 부력의 개념이다.
그림 Bonjean Curve
임의의 수선에서 횡단면의 면적은 Simpson's 1st Rule 같은 방법으로 구할 수 있고 이를 수선변화에 따른 곡
private opinions is one of the key roles of government. There are more than 700,000 of private associations which are actively participating in public affairs.
Like this, France government has centralized strong power but also democratic and pluralistic. Korean government has something in common with it. we investigated that in 3 sections – the structure, personnel system, environment.
Structural Properties
Fig.1. presents cross-sectional FE-SEM images of all the samples. For all the samples, the columnar shaped ZnO grains grown normal to the substrate surface are clearly seen. When MZO and GZO films are deposited after ZnO films, it seems that similar columnar shaped grains are formed. It can indicate if the same conditions are preserved, all films can be grownvertically. I
4. STRUCTURE DESIGN
4.1. Wing structure
Wing structure
The wing on the plane is a part that the highest load take. The large bending moments especially act on the point near the root of wing. Also, we should consider the number of spar, rib, position, skin thickness and taper ratio.
I Beam shape
4.2. I Beam
Beam theory shows that the I-shaped section is a very efficient form f