Measurement of Young's modulus using sonic resonance
The principal idea behind the sonic resonance test method can be explained using the equation by which one can measure the propagating speed of flexural sonic wave through a medium
(1)
where v is the propagating speed of the flexural wave on a string, F is the tension applied to both sides of the string, P is the mass per unit leng
with EtOH and drying
The Barrett-Joyner-Halenda (BJH) method for calculating pore size distributions is based on a model of the adsorbent as a collection of cylindrical pores. The theory accounts for capillary condensation in the pores using the classical Kelvin equation, which in turn assumes a hemispherical liquid-vapor meniscus and a well-defined surface tension.
(Al2O3) and thorium (ThO2) in the ceramic 0.05 (mm) or less resistance of the platinum coil The structure of putting
Platinum resistance and bleeding in the constant current Road heat devices degree 200-300. When the combustible gas contact with this by action of the catalyst, Measure the increase the resistance of Pt Resistance wire by heat up university’s temperature
Introduction : Leaching Losses Of N
NO3- has been thought to be predominant form of leaching losses of N from agricultural fields
It is conventional wisdom that DON takes negligible portion on leaching losses of N
Leaching DON might not be insignificant and harms human
It should be considered when N budgets are constructed
What is DON?
TDN(Total Dissolved Nitrogen) consists of DIN
사회주의체제의 전형적 특징
현실 사회주의체제는 ‘부족의 현상(shortage phenomenon)’과 ‘화폐과잉(monetary
overhang)으로 인한 인플레이션’을 일반적인 특징으로 한다.
여기서 부족이란 특정 상품이 전체 경제의 필요에 비해 공급량이 적은 경우뿐만
아니라, 전체 경제의 필요를 충족시킬 만큼 생산이