신뢰게임으로 측정한 협동형 대안교육의 사회경제적 가치

조남운,어수진,김유미,이가영 한국사회경제학회 2020 한국사회경제학회 학술대회 자료집 Vol.2020 No.가을

대전 3ㆍ4 산업단지 주변의 하천수 및 지하수오염 실태조사

조남운,김태응,손동훈,임봉수 대전대학교 산업기술연구소 2000 산업기술연구소 論文集 Vol.11 No.2

The purpose of this study is to investigate the quality of surface water and groundwater near the Daejeon 3.4 industrial complex. In the case of surface water quality as considered by BOD, the water quality of the Hyun-do Bridge in Kum river was suitable to the class II (less than 3mg/L) of environmental standard for the river. The water quality of Bool-lo Dong in Kum river after joins Kab stream was class III (less than 6mg/L) and the water quality of Kab-chun Bridge was over class V as over about 8mg/L(less than 10mg/L). In the result for the groundwater at Wit-mal, the NO3-N concentration was average 14.6mg/L and maximum 23.4mg/L that was about twice more than the drinking water quality standard regulations(10mg/L). In other points, the groundwater quality was inadequate to the standard for a few items.

HBR과 결합된 간헐폭기공정에 의한 도시하수의 영양소제거 특성

조남운,임봉수,손동훈 대전대학교 산업기술연구소 2000 산업기술연구소 論文集 Vol.11 No.1

In this study, the characteristics of organics and nutrient removal from municipal wastewater with various operation conditions using modified intermittent aeration combined with HBR process was investigated. This system was operated with HRT of 10hr at COD/N 1.96, COD/P 75.3, sludge recycle of 50% to 100% and 18℃ to 25℃. It has been the best operating condition to control, Oxic/Anoxic time ratio setting rate has been set 40min/20min and 100% of sludge recycle, under the conditions such as 2hr HRT at the anoxic reactor, 6hr HRT at the aeration tank. In that conditions, the removal efficiency of BOD, COD, T-N and T-P were 97.5%, 91.7%, 75% and 76.2%, respectively. The SNR(Specific Nitrification Rate) was 3.213mgNH4-N/gMv/hr and the SDNR(Specific Dinitrification Rate) was 4.5mg NO3-N/gMv/hr. T-P removal efficiency is due to biological phosphorus removal and formation of chemical precipitates by pellet. The performance of wasted sludge dewatering in this process is better than wasted activated sludge.

HBR + 변형된간헐폭기공정을 이용한 도시하수중의 질소 , 인제거

조남운,임봉수,김태응,박혜숙,정원문 대한환경공학회 1999 대한환경공학회 학술발표논문집 Vol.1999 No.4

선거예측시장에서의 당파적 거래: 2012 대선 주식시장에 대한 보고

조남운 ( Namum Cho ),박원호 ( Won-ho Park ),한규섭 ( Kyu S. Han ),안도경 ( T. K. Ahn ) 서울대학교 한국정치연구소 2016 韓國 政治 硏究 Vol.25 No.3

본 논문은 2012년 제18대 대한민국 대통령선거 기간 동안 운영된 정치예측시장의 결과를 보고한다. 정치예측시장에서 거래자들의 행태를 분석함으로써 다음과 같은 질문들에 답하고자 한다. 첫째, 거래자들의 당파성 혹은 후보선호는 개별 거래자의 거래 행태와 전체적인 정치예측시장 결과에 영향을 주는가? 둘째, 여론조사 결과의 공표금지는 정치예측시장에 어떠한 영향을 주는가? 예측시장에서 당파적 거래의 양상은 강하게 나타났고 이는 투표일이 가까워질수록 더 강화되었다. 그러나 당파적 거래는 정치적 선호의 직접적인 표출이라는 형태보다는 선거결과에 대한 예측이 자신의 지지후보에 대한 확증편향에 근거하는 간접적인 형태가 주를 이루었다. 여론조사 금지 기간 동안 문재인 후보 지지자들 사이에서 확증편향에 의한 당파적 거래가 강화됨으로써 예측시장은 실제 선거의 결과를 예측하는데 실패하였다. This paper reports the results of a political prediction market run during the 2012 Korean presidential election. By analyzing the behaviors of traders, we aim to answer the following questions. First, how does the partisanship or candidate preference of traders affect trading patterns and the prediction market outcome? Second, how does the prohibition of releasing opinion survey results affect the political prediction market? Partisan trading was pervasive in our prediction market and grew stronger during the final phase of the election. However, rather than a direct manifestation of political preference, the partisan trading mainly took an indirect form in the sense that it was mediated by traders` prediction of the election outcome which in turn was influence by confirmation-bias. The partisan trading grew stronger, especially among the traders who supported candidate Moon, during the period in which publication of opinion survey results was banned, eventually leading to the market`s failure in predicting the election outcome.

경제 실험의 환경 및 보상이 참여 동기에 미치는 영향

조남운 ( Namun Cho ),신우진 ( Woojin Shin ) 한국경제교육학회 2018 경제교육연구 Vol.25 No.2

본 연구는 학점 및 금전적 보상에 따른 실험의 결과와 웹(Web)과 랩(Lab)에서의 결과를 비교하여 실험 환경 및 보상이 실험에 미치는 효과를 살펴보았다. 분석 결과, 환경 및 보상의 차이에 따라 평균적인 전략의 차이는 유의하지 않지만, 전략의 변동성은 금전적 보상으로 실험한 그룹이 일관적으로 크게 나타났다. 한편, 학점 보상을 한 웹 실험의 전략 변동성은 랩 실험(금전적 보상)과 큰 차이를 보이지 않았다. 즉, 학점 보상이 주는 인센티브 효과는 랩 실험이 부여한 통제 환경과 유사한 정도의 실험 집중도를 유도했다고 볼 수 있다. 이러한 결과는 경제교육에 실험 활용의 관점에서 볼 때, 비금전적인(학점 등) 보상과 웹 실험을 결합하여 시간, 공간, 예산 등의 제약을 부분적으로 극복할 수 있으며, 통제력이 강한 실험에서 얻을 수 있는 동기 및 학습효과 등의 긍정적인 효과도 얻을 수 있음을 보여주고 있다. To examine the effect of the experiment environment and compensation in the economic experiment, we compared the results of the experiment with the credit and the monetary compensation, and the results of the experiment in the web and the lab environment. In the analysis, the difference of the average strategy was not significantly different. However, in the web environments, the strategic volatility in the monetary payoff group was consistently larger than that of the credit payoff group. On the other hand, the strategic volatility of the web environment with credit compensation did not show much difference from the lab environment with monetary compensation. We can interpret this result that the incentive of credit compensation is stronger than monetary compensation. In addition, the incentive effect of the credit compensation which induces a concentration is similar to the environmental effect of the controlled lab environment. From these results, the limitations of time, space, and budget in economic experiment can be partially avoided by adopting non-monetary compensation and web environment. Additively, we could expect positive effects such as motivation and learning effects of student participants in economic experiments.

플라스틱의 열분해 및 촉매분해 특성연구

조남운,김한수,안영일,박영성 大田大學校 環境問題硏究所 1999 환경문제연구소 논문집 Vol.4 No.-

Themal and catalytic pyrolysis of plastics have been carried out. The thermogravimatric analyzer(TGA) and batch type laboratory scale catalytic reactor were used as experimental rigs. Pure or waste plastic samples(HDPE, PP,PS, ABS), collected from domestic industry were used for the experiment. The powder of silica alumina(50g) was used as catalyst for pyrolysis. The experimental results showed that the decomposition temperature was increased with an increase of heating rate, because of time lag associated with heating of plastic samples. It was also found that the maximum decomposition rate and decomposition temperature of HDPE are much higher than those of other samples.

플라스틱의 열분해 및 촉매분해 특성연구

김한수,조남운,안영일,박영성 대전대학교 환경문제연구소 1999 환경문제연구소 논문집 Vol.4 No.-

응집제를 활용한 간헐포기 MBR공정에서 순간플럭스 증가가 분리막에 미치는 영향 평가

최송휴,조남운,한명수 한국막학회 2005 멤브레인 Vol.15 No.1

폭기조를 간헐 폭기로 운전하여 호기/무산소(oxic/anoxic) 시간 비율과 무산소 조건에서 호기 조건으로의 전환시 공기세정이 투과플럭스 및 투과압력에 미치는 영향을 조사하였으며, 호기조건에서 무산소 조건으로 전환 시 펌프의 회전력에 의한 흡인압력이 투과플럭스와 투과 압력에 주는 영향을 조사하였다. 또한 긴 슬러지체류시간(SRT; Sludge Retention Time)과 고농도의 MLSS 유지시에 발생하는 미생물 대사산물이 분리막에 미치는 영향과 응집제를 투여하였을 때 분리막에 작용하는 플러스 효과에 대하여 조사하여 보았다. 호기/무산소(oxic/anoxic)의 시간비율에 따른 유기물 및 질소 제거효율을 조사해본 결과 폭기 40 비폭기 20분의 시간배분 조건에서 처리효율이 가장 양호하였으므로 호기/무산소(oxic/anoxic) 조건을 40/20분으로 한 조건(step-7)에서 약품주입 실험을 수행하였다. 액체 명반을 폭기조에 직접 투여할 경우 약품의 농도가 질산화 및 탈질 미생물에 많은 영향을 주는 것을 알 수 있었으며, MBR공정에서 인 1 mg/L를 제거하기 위해서는 약 0.7 mg/L의 액체명반이 필요한 것으로 확인되었다. By supplying air intermittently in various mode, the effects of oxic/anoxic time ratio and air scrubbing in aeration condition on the membrane flux and permeability were investigated. When suction pump stops, vacuum pressure remains inside the suction pump. Therefore, the effect of remaining vacuum pressure in the suction pump on fouling of membrane was investigated. The effect of EPS (Extra cellular Polymeric Substance) which is generated due to the long SRT and high concentration of MLSS and the dose of coagulant on the membrane were also investigated. The suitable oxic/anoxic time ratio for the best removal efficiency of organic matter and nitrogenous matter was 40 minutes (Oxic) : 20 minutes (Anoxic). At this time ratio, alum was dosed into the aeration tank. The result of dosing alum was that the concentration of alum solution might affect nitrification and denitrification. To remove 1 mg/L of phosphorus in MBR process, it needs 0.75 mg/L of alum solution.

간헐포기를 결합한 MLE 공정과 A2/O 공정의 영양소제거 특성 비교

임봉수,어성욱,조남운 대한상하수도학회 2001 상하수도학회지 Vol.15 No.4

This study was conducted to compare the nutrient removal with the ratio of anoxic and aerobic time by partitioning aerobic tank in MLE and A2/O process. The maximum removal efficiency rate of total nitrogen was about 53% for MLE, about 64% for A2/O, respectively. The removal efficiency rates of total nitrogen in both processes were higher than the existing processes without intermittent aeration. Denitrification rates were about 81% for MLE, about 44% in anaerobic tank, and about 50% in anoxic tank for A2/O. MODE 3(anoxic/oxic time: 10min/50min) was the highest nitrification rate, the removal efficiency rate of NH^+₄-N in this case was 91% for MLE, 98% for A2/O, respectively. These removal efficiency rates were nearly alike according to the reduction of aeration time, but oxic/anoxic ratio over 2 was required. The average removal efficiency rate of total nitrogen was from 48% to 60% for MLE, from 54% to 71% for A2/O, respectively.