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시스템 다이내믹스의 정책지렛대를 활용한 RTE 핵심성공요인 도출에 관한 연구
정재운,김현수,최형림,홍순구 한국시스템다이내믹스학회 2007 한국시스템다이내믹스학회 춘계학술대회 발표논문집 Vol.2007 No.-
본 연구는 실시간 기업(Real-Time Enterprise:RTE)의 핵심성공요인(Critical Success Factor: CSF)을 도출에 관한 내용으로써 기존에 연구되었던 ``시스템 사고로 분석한 RTE 주요성공요인``의 연구 방법론을 개선하기 위해 동일주제로 연구되었다. 본 연구에서 도출된 성공요인의 결과를 기본 연구와 비교하였을 때 기존보다 크게 개선된 바는 없지만, 연구방법론 측면에서 시스템 다이내믹스의 정책지렛대라는 문제해결 방안도출 방법론을 활용함으로써 기존보다 객관화된 요인 도출과정을 설명할 수 있었다. 본 연구는 기존에 연구되었던 정재운 외(2006)의 ``시스템 사고로 분석한 RTE 주요성공요인``의 내용을 개선하기 위한 것으로써 기존 연구의 내용 및 내용 전개방식의 상당부분을 별도의 표기 없이 참조하고 있음을 서두에 밝혀둔다.
정재운,윤광식,최우정,최우영,이수형,장남익,홍순강,주석훈 한국습지학회 2008 한국습지학회지 Vol.10 No.3
본 연구에서는 논에서의 영양물질 제거능력에 대하여 평가하였다. 논을 인공습지라는 관점으로 보고 전라남도 함평군 엄다면 화양리의 논 지구(이하 학야지구)를 시험지구로 선정하여 2004년 5월부터 9월까지 영농기 기간동안 조사하였다. 학야지구를 대상으로 물수지 및 물질수지를 조사하여 논에서의 T-N, T-P의 제거능력을 조사한 결과 지표유출 부하로 T-N, T-P가 각각 20.82 kg/ha, 1.55 kg/ha로 나타났으며, 이는 연구대상 논에 총 투입된 T-N, T-P의 13.2%와 6.4%에 해당되는 양이다. 연구 결과는 투입된 대부분의 영양물질이 논에서 처리됨을 보여주었다. In this study, the nutrient removal capacity of paddy field was investigated. Paddy field was considered as a constructed wetland. The present study was conducted during a cropping period in a rice cultivation area located in Hampyung-gun, Jeollanamdo, Korea. Water balance and mass balance of nutrients were estimated after intensive field monitoring. The surface runoff losses of T-N and T-P were 20.82 kg/ha and 1.55 kg/ha, respectively. The losses were 13.2% and 6.4% of T-N and T-P input into paddy fields, respectively. The results showed that the paddy fields have nutrient removal function.
정재운,박하나,윤광식,최동호,임병진 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.5
Characteristics of non-point source (NPS) pollution runoff from a public park in Gwangju, Korea were investigated. Results exhibited the highest pollutant concentrations at the start of the rainfall events due to their build-up and wash off processes. The average event mean concentrations (EMCs) were 27.8, 7.2,56.3, 7.5, and 0.84 mg/L (range: 4.2-54.8 mg/L) for COD, (0.5-20.8 mg/L) for TOC, (22.3-138.4) for SS, (1.4-18.5 mg/L) for TN,and (0.17-2.02 mg/L) for T-P, respectively. The study site presented a strong first flush effect for most rainfall events. However, no first flush effect was observed in rainfall events with small rainfall factors (e.g. intensity, amount, and runoff depth). On the other hand, the ratios of total pollution loads discharged by the first 20% of runoff volume were 32% for COD, 34% for TOC,36% for SS, 42% for T-N, and 50% for T-P. Especially, MFF20(mass first flush) values of T-N and T-P were larger than those of other pollutants (COD, TOC, SS), indicating that T-N and T-P are easily transported by stormwater runoff from the public park. First flush management of T-N and T-P, therefore, is required for efficient water quality management of the public park.
정재운,윤광식,주석훈,최우영,이용운,류덕희,이수웅,장남익,Jung, Jae-Woon,Yoon, Kwang-Sik,Joo, Seuk-Hun,Choi, Woo-Young,Lee, Yong-Woon,Rhew, Doug-Hee,Lee, Su-Woong,Chang, Nam-Ik 한국농공학회 2009 한국농공학회논문집 Vol.51 No.6
In this study, pollutant loads delivery ratio by flow duration in Hwangryoung A watershed was estimated. The delivery ratio was estimated with measured data by Ministry of Environment(MOE) and the regression equation based on geomorphic parameters. Eight day interval flow data measured by the MOE were converted to daily flow to calculate daily load and flow duration curve by correlating data of neighboring station which has daily flow data. Regression equation developed by previous study was tested to study watershed and found to be satisfactory. The delivery ratios estimated by two methods were compared. For the case of Biochemical oxygen demand(BOD), the delivery ratios of low flow condition were 7.6 and 15.5% by measured and regression equation, respectively. Also, the delivery ratios of Total phosphorus(T-P) for normal flow condition were 13.3 and 6.3% by measured and regression equation, respectively.
정재운 한국디지털정책학회 2018 디지털융복합연구 Vol.16 No.7
Compartment models, a type of mathematical model, have been widely applied to characterize the changes in a dynamic system with sequential events or processes, such as the spread of an epidemic disease. A compartment model comprises compartments, and the relations between compartments are depicted as boxes and arrows. This principle is similar to that of the system dynamics (SD) approach to constructing a simulation model with stocks and flows. In addition, both models are structured using differential equations. With this mutual and translatable principle, this study, in terms of SD, translates a reference SEIR model, which was developed in a recent study to characterize the transmission of the Middle East respiratory syndrome (MERS) in South Korea. Compared to the replicated result of the reference SEIR model (Model 1), the translated SEIR model (Model 2) demonstrates the same simulation result (error=0). The results of this study provide insight into the application of SD relative to constructing an epidemic compartment model using schematization and differential equations. The translated SD artifact can be used as a reference model for other epidemic diseases.