addict ratio – 14.4%
- 2007 Center for internet addiction
1. Psychological (or pathological) approaching method
- Causes of Internet addiction
Low self-esteem
Undeveloped self-control (mainly related to age)
2. Social support approaching method
- Causes of Internet addiction
Social factors
Whether people have some social support for control of Internet use
their propensity to commit deviant acts. To the main purpose, the study task was to recognize how those factor of family, school environment have influence on internet addiction. This study described an attempt to explore adolescents’ Internet addiction through interviews and questionnaires.
Ⅱ. Internet addiction &
The approaching method of previous researches
controlling the ratio of wet harvest and dry harvest is possible with some method. That is, we can fix the ratio with 70% of wet harvest regardless of the length of term (either in short-term or in long-term). Although wet harvest is more beneficial to farmers so every farmer will prefer water harvest to dry harvest, we can avoid the increase of ratio by giving some incentives to dry harvest. In
측정방법)
Mini Vol. Air sampler
Sampling Procedure
소용량 공기포집법 원리 및 특징(Mini volume air sampling method)
Mini Vol. 사용시 주의사항
Mini Vol. Air Sampler Controls
유량 및 농도계산
High vol. air sampler (TSP)
High vol. air sampler(PM10)
채취특성 곡선
베타선 흡수법
(β-ray Absorption Method)
광산란법
(Light scattering method)
Control) Method
i) IMC 의 Transfer function setting
FOPDT model :
이를 바탕으로 공정의 모델 를 설정한다. load 값 이며, 수송지연에 대한 근 사치로 1차 pade 근사식을 사용하면
모델의 Transfer function
을 , 두 부분으로 나누면
로 두면
∴, , ,
ii) Trial & Error method로 적절한 값을 선택하여 IMC Tr