resistance that prevent corrosion of interior reinforcing rod because is alkalinity is security
3) have excellent modeling.
4) ability that have high hardness and stand in shock of pedestrian or machine operation etc. is big.
On the other hand, shortcoming is
1) withstand to Apchukryeok, force that press, but is weak in tensility, force that pull.
2) because weight is high than strength,
1. Pump에서의 Cavitation (공동현상) 에 대하여 기술하고 이로 생길 수 있는 문제점과 그 방지책에 대해 논하시오
- Cavitation이란
유체가 넓은 유로에서 좁을 곳으로 고속 유입하거나 벽면의 요철, 만곡부 등으로 흐름이 직선적이지 못할 때 유체는 저압이 되고 포화증기압보다 낮아지면 기화되어 기포가
I. 서론
Blood Pressure
Figure 1-1 : 혈액이 혈관에 작용하는 혈압을 보여주고 있습니다.
혈관계 회로에서 심장박동의 펌프작용으로 박출된 혈액에 의해서 혈관벽(특히 동맥)에 생기는 압력. 심장에서 혈액이 박출될 때 약간 탄력성을 갖는 혈관벽이 조금 넓어지고 동시에 혈액은 혈관벽에 대한 혈
1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine
나노복합재료연구실 ( Nano Composite Research Lab.)
1. Purpose of this study
■ Measurement of Young's modulus using sonic resonant test
■ Measurement of Young's modulus using beam bending test
2. Introduction
Young's modulus is one of the important materials properties that is related with the bonding force between atoms or ions in materials. That will give a cle