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金吉東 大田工業專門大學 1983 論文集 Vol.32 No.-
경제기획원 推計에 따르면 1983.1.1 새벽 0시 現在 우러 나라 총인구는 3,964만 1,635명으로 推算하였다. 이것은 每 34秒마다 1명이 出生하고 124.7秒마다 1명이 死亡, 50.4秒당 1연적 늘어나며 1 日 平均 1,715명씩 增加할 경우 83年度의 人口增加率은 1.57%, 國路人口는 1983.8에 4,000만을 돌파할 것으로 展望했다. 여기에서 124.7秒당 1명씩 死亡을 근거로 하면 1933년에 25만2,895명이 死者로 變身한다는 事寶을 默示하고 있다. 모든 人間들은 出生과 동시에 죽음 즉 무덤으로 向한 入生을 營爲하고 있다는 事實은 否認할 수도 없고 避할 수 없는 眞理일 것이다. 이 嚴然한 眞理를 人間들이 단지 忘却하거나 外面하고 있을 뿐이다. 人類가 永遠한 存注라면 墓地의 需要도 無限定일 것이다. 人口의 增設는 必然的으로 墓地의 塘詰을 促進시키딘 이 促進作用은 國土可用面費의 霧食을 招來한다는 現實을 우리는 直視하여야 한다. We are born in human beings, therefore man should be mortal, This paper treats the cemetery which is a place to find peace. But it has many problems awaiting solution . Investing the effective land use and management, 1 project with certainly the counterplan. The results are summarized as follows ; 1. The Reduction Plan of the cemerery Area I propose that Article Ⅱ- Enforcement Ordinance of Burial and Cemetery must be amended below 4㎡. For this amend 1'estricts the cemetery scale . 2. The upper Floors Plan of the Cemetery Structure There are many enlargement and scatter in cemetery area . This present state may result in erosion of the national land . Therefore, 1 map out a Solid cemetery that makes good use of underground and ground. 3. The Constructing of the Island Cemetery It being small in area, I have Plan that we can utilize well adapted islands built cemetery park.
차세대전동차 대차단위 제동시스템 점착력 모델링에 관한 연구
김길동(Gildong Kim),이한민(Hanmin Lee),박성환(Sunghwan Park) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
In the braking process of rolling stocks, the equivalent braking force is applied to the all bogies. However, the load applied to the front and rear bogie are different in the actual commercial traveling. In the case, since the different slip situation is occurred in each bogie, it is essential to use the independent anti-slip control per bogie unit in order to reduce the loss of braking force. In this paper, the mathematical modeling about bogie unit braking is proposed and verified.
DTP 시스템에서 소재의 이송 및 부착거리가 액적 거동에 미치는 영향에 관한 수치적 연구
김길동(Gil Dong Kim),이길원(Gil Won Lee),박우범(Woo Beom Pakr),박차식(Chasik Park),박경우(Kyoungwoo Park) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
In high speed of single-pass type DTP(digital textile printing) system, the printing quality of a shear-type piezoelectric inkjet printhead is influenced by the nozzle shape, the substrate movement, and distance between nozzle exit and substrate. It is also well known that the printing quality is generally dependent on the volume and velocity of main and satellite droplets and break-up time. Therefore, in the present work, the droplet behavior of a piezoelectric actuator is investigated numerically. The transient three-dimensional conservation equations of mass and momentum are solved by the computational fluid dynamics(CFD). The continuous surface force(CFS) model is used in order to predict the effect of surface tension force in the free surface flow. The volume-of-fluid method with the piecewise linear interface construction (PLIC) scheme is employed for tracking the interfacial movement and reconstructing the interface between ink and air. The interaction between the air flow induced by droplet drag and the Couette flow entrained from the substrate movement is also investigated as well as the effect of distance between nozzle exit and substrate.