Airport management, in common with others involved in the operation of elements of the civil air transportation system, are required to take measures that will provide a high level of protection of buildings and equipment (including aircraft), in addition to ensuring the safety and personal security of passengers and staff using the system. This must be done in manner that disturbs the normal ope
direction are by a continuous situation assessment of the changing security climate. Factors that can radically alter the security threat in a particular country or at a particular airport are political agitation or unrest and widespread publicity of other security incidents. Figure 1.2 indicates the conceptual structure of the security planning cycle. Reassessment of threat should take into acco
1.개요
1) 원리
시료를 이온화 시킨 후 시료의 분자 이온이나 분자의 조각이온을 질량/전 하수(m/z비)에 따라 분리하여 독특한 패턴의 질량스펙트럼(mass spectrum)을 얻고 이 스펙트럼의 해석에 의해 물질의 정성(스펙트럼의 위 치) 및 정량(강도)분석을 행한다.
2) 특징
(1)유기 화합물의 경
direction, inlet locates downside and outlet locates upside.
Through this, we can know that axial impeller is not suitable. Also, because of wide width of tank, it has poor mixing.
Second, there is a problem with chemicals. PAC is injected with Cl2, so activation of Cl2 must be restricted.
Also, using alum may cause settling.
Alum lowered pH in localized area. To overcome this problem, we
Purpose
Sending a thin water film to under direction.
Sending a countercurrent air flow and Oxygen is absorbed into the water.
Measuring Mass transfer coefficient.
Vapor-liquid mass transfer device
Means of basic experiment for understanding the mass transfer phenomena
Dissolved Oxygen is the state of oxygen molecules dissolved in the water or a solution.
At the state of 20℃