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이정수 대구산업정보대학 1995 논문집 Vol.9 No.2
As mentioned above,we know that the intake of food by people in our country has nearly approched the encouraged amount of nutrition. Based on this fact, many nutritionists conclude that there is no health impediment due to malnutrition, for the nutritive condition of Korean people today is much better than that in the past,and the intake of food and the encouraged amount of nutrition are nearly balanced. Nevertheless, we should not overlook a few points:imperfection of the encouraged amount of nutrition itself;probable imbalance of nutrition due to excessive intake of manufactured food and fast food;the menace to human health due to theaggravation of environmental pollution ; and probable malnutrition due to the destruction of nutrients during the process of cooking because of imperfect education for nutrition. Therefore, in order to maintain the necessary balance of perfact nutrition, we should duly consider the following points : 1. Elimination of environmental pollution. 2. Consumption of food and drink with natural nutrition(without the process of manufacture and cooking) if possible. 3. Reduction of the intake of manufactureed food as much as possible. 4. Consumption of high fiber food and low carbohydrate food if possible. Putting aside various points of view,we can see that the condition of human health is always threatened by various factor even though the dietary life for human health has nearly approached the encouraged amount of nutrition. Therefore, we should empasize the necessity of preventive measure or improvement of supplemental food for human health.
이정수,Lee, Jeong-Su 한국자연공원협회 1987 한국자연공원 Vol.35 No.-
북한의 금강산댐 건설로 말미암아 일찍이 서산대사(1520-1604년) 가 우리나라 4대명산(동 금강산.서 구월산. 남 지리산. 북 묘향산)의 하나로 꼽은 금강산이 이그러진 모습으로 떠올려짐은 자연을 사랑하는 우리민족에게는 큰 충격이 아닐 수 없다. 본지는 몇가지 자료와 함께 저명한 소설가인 이정수씨 께서 특별기고해주신 금강산탐승의 "수상"을 함께담아 특집으로 묶어보았다.
이정수,김상돈 한국화학공학회 1982 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.20 No.3
수직 공기압 수송관(7.8㎝-내경 × 600㎝-높이)에서 시멘트 원료 분말(d_p=23.6㎛)을 수송할 때의 기포, 난류, 고속 및 희박상 흐름 특성을 연구하였다. 공기 유속 및 입자의 순환량이 압력강하, 층의 균일성 및 기체혼합에 미치는 영향을 결정하였다. 층의 균일성을 측정키 위하여 capacitance probe를 사용하였고, 기체혼합정도를 측정키 위하여 tracer를 주입하여서 농도 변화를 높이에 따라 측정하였다. 수송속도는 공기유속과 입자순환량을 변화시켰을 때 압력강하로써 결정하였다. 본 실험에서 기포층과 난류층의 경계속도는 39㎝/sec이었고, 수송속도는 170㎝/sec로 나타났다. 난류흐름층의 균일성은 기체유속에 따라 증가하였으나 기체 역혼합도는 기체유속에 따라 감소하였다. 수직 공기 수송계의 흐름 특성을 결정키 위하여서 흐름 영역 경계도에 대한 실험식을 제시하였다. The flow characteristics, the beds of bubbling, turbulent, fast and dilute phase, have been studies in a vertical transport line(7.8㎝-ID × 600㎝-height). The cement raw meals have been transported by compressed air at various flow regimes. The effects of gas velocity and solid circulating rate on the pressure drop, bed homogeneity and gas backmixing have been determined by measuring the fluctuations of pressure drop. Capacitance probe has been employed in order to measure the bed homogeneity. The degree of backmixing was measured using tracer injection technique. The transport velocity has been determined from the data of pressure drop at various air and particle circulation rates. From the present study, the slug breakdown and transport velocities have been found to be 39 and 170㎝/sec, respectively. The bed homogeniety of turbulent bed increased with gas velocity. However, the extent of gas backmixing decreased with increasing gas rates in the turbulent beds. Equations were proposed in order to construct a flow reggime diagram in the vertical transport line.