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박준일 해군대학 1986 海洋戰略 Vol.- No.41
치과질환에는 충치(치아우식증), 치주질환(소위 풍치) 그리고 부정교합과 외상에 의한 질환이 있습니다. 이중 치아우식증은 치아 성분 중 칼슘이 탈회되고 유기질이 파괴되어 치아의 결손을 초래하는 치아 경조직 질환으로 인류에서 가장 빈발하는 질환입니다. 이는 일단 발생하면 자연치유가 불가능하므로 보존치료 혹은 보철치료를 행해야 하며, 후유증이 남게 됩니다. 식생활과 밀접한 관계가 있고 연소자에게서 발생률이 높으므로, 20대전까지의 치아관리는 치아우식증에 특히 신경을 써서 설탕의 섭취를 적게 하여야 합니다.
물과 공기를 병용한 역세척 방식의 효과 및 적용성 분석
박준일,신형우,이봉옥,장영태,조봉철 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-
Determination of backwashing method is very important to be successful in rapid filtration process. In this study, an analysis of the effectiveness and the applicability for backwashing method of filter layer in Jinju water purification plants, and the cleaning efficiency of three different backwashing methods has been investigated. Actually, dual media of anthracite and sand was replaced sand filter. Improving filter run time was extended 2.42 times. Thus, the backwashing numbers is 16 to 25 for present filter in summer. And that improving backwashing number was reduced 7 to 10 with same water quality, and media loss was not developed any more. An applicability analysis of KOWACO and Jinju water purification plants was showed little difference for water with air-backwashing equipment. Cost of construction for improving backwashing method of filter layer amounts about 406 million won in case of Jinju water purification plants. This cost to pay back after 5 years.
L-Moment 법을 이용한 지역적 가뭄빈도분포형 결정
강인식,신형우,이종규,박준일 慶尙大學校生産技術硏究所 1999 生産技術硏究所論文集 Vol.15 No.-
To quantitatively investigate the nationwide drought characteristics and to comparatively evaluate the drought severity, regional frequency analysis developed from cumulative monthly precipitation series is made for the meteorological stations in each of the 15 subbasins covering the whole nation. The best-fit probability distribution is chosen by the method of frequency analysis made the discordancy measure for each stations, the regional heterogeneous measure and the goodness-of-fit measure, the probability distributions fitted drought precipitation series are multi-parameter probability distributions, The method of L-moments is used to determine the unbiased parameters of each distribution and the best-fit distribution for each subbasin of various durations(4, 6, 9, 12, 15, 18, and 24 months) with return periods of 2, 5, 10, 20, 50, and 100 years are estimated. This study is focused on suggesting the method determines the drought precipitation of the durations and return periods of each regions by the probabilistic analysis.
南江댐 流域에 있어서 高度에 따른 降水量分布에 關한 調査 硏究
梁崙模,朴浚一 慶尙大學校生産技術硏究所 1990 生産技術硏究所論文集 Vol.6 No.-
Based on rainfall over upper basin, dam operation would be used. There are some questions in convertion point rainfall measured in upper basin to areal rainfall. Since the rainfall varies with basin elevation, orientation, density of rain gauges and topological distribution of mountains. Among these elements, basin elevation would influence the distribution of rainfall over a basin. Therefore, this paper aims at rainfall distribution according to basin elevation in the Nam River dam basin where there have complex terrain. Authors can be formulated the relation between basin elevation and rainfall depth in the Nam River dam basin.
朴浚一 慶尙大學校生産技術硏究所 1987 生産技術硏究所論文集 Vol.3 No.-
A knowledge of velocity distribution for turbulent in open channel is very important in study of fluid mechanics. The theoretical investigations of Prandtl and Von karman on flow through pipes, and the experimental studies of Nikuradse have led to rational formulas for velocity distribution and hydraulic resistance for turbulent flows over flat plates and in circular pipes. These formulas have been extended to open channel flow. Although some general similarities exist between the flow through pipes and the flow through open channels, certain factors such as the presence of a free surface, three dimensional nature of the flow due to noncircular cross section of the channel, and nonuniform distribution of shear along the wetted perimeter distinguish the open channel flow from pipe flow. In most practical cases, the point of maximum velocity is not occur at free surface. In this paper, it is studies that velocity distribution curve for turbulent flow in open channel according to change of channel width, flow depth and roughness height.
朴浚一 慶尙大學校 1982 論文集 Vol.21 No.1
Recently, the interest of the longitudinal dispersion process in streams has been increased. Indeed, the greater use of natural water resources demands on increased understanding of the capacity of a river to disperse contaminated water returned to it as waste. Knowledges of the dispersion chracteristics of streams are essential to the understanding and managing of water pollution problems. In general, it has known that longitudinal dispersion coefficient is depent upon flow factors and geometrical factors; velocity, turbulence, river width, roughness, dead zone, meandering, etc. In this paper, author studied for the longitudinal dispersion coefficient and predicted to longitudinal dispersion coefficient in trapezoidal section channel.
2次元-表層密度流場의 解析에 있어서 境界層近似 適合性 檢討 : K-ε모델의 경우 with k-ε Model
金基興,咸契運,朴浚一 慶尙大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.11 No.-
Solving buoyant surface jet, the most important problem is the expression of turbulent transport. In this study, the compatibility of boundary layer approximation of k-ε model which has been applying to predict the turbulent transport in buoyant surface jet are considered. The results which has been comparing the computations of boundary layer approximation equations and full equation with experiments showed. As the result of this study, the hypothesis of boundary layer approximation does not express the transport by mean buoyancy in buoyant surface jet exactly, the hypothesis of boundary layer approximation is not valid for simulation of buoyant surface jet with k-ε model.