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- 저자 : 朴浚一 (검색결과 93 건)
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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.
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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.
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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.
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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.
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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.
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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.
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고휘도 발광다이오드와 마이크로컨트롤러를 이용한 물결파 투영장치 교재 개발 연구
박준일,주영구 한국물리학회 2009 새물리 Vol.58 No.2
A ripple tank experiment is an effective experiment that is illustrated in textbooks to explain wave motion. However, existing ripple tanks suffer from low-contrast wave images because they use a large incandescent light bulb as a light source. In addition, the vibration of the motor used for wave generation distorts the ripple mark, making a classroom experiment more difficult. The authors designed a new ripple tank using high-brightness light-emitting diodes and an electromagnet controlled by using a micro-controller in order to improve the contrast of the wave image and the control of wave generation. The developed ripple tank and the new teaching material were applied in a high school class. The survey results from the students indicate that compared to the existing ripple tank experiment, the new equipment results in improved learning and attention drawing. 현재 중고등학교 교과서에서 파동 현상을 설명하기위해 물결파 실험이 제시되어 있다. 그러나 기존의 물결파 투영장치는 백열등을 광원으로 사용하기 때문에 투영된 상이 선명하지 않을 뿐만 아니라, 모터 진동으로 인해 파형이 일그러지고 흔들려 실제 파동현상을 관찰하기 어렵다. 본 논문에서는 점광원에 가까운 고휘도 발광 다이오드와 파동의 발생을 정밀하게 제어할 수 있는 마이크로컨트롤러를 이용하여 물결파 투영장치를 제작하고, 이를 교육현장에 투입하여 그 교육 효과를 분석하였다. 새로 개발된 물결파 투영장치는 기존 장치에 비해 파형이 선명해 지고 정밀한 제어가 가능해 짐으로써, 실험의 정확도와 시각적 효과가 개선되었다. 또한 설문 조사를 통해 학생들이 느끼는 학습 효과 및 흥미 유발 요소가 더 향상되었음을 확인할 수 있었다.
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