논 관개수, 담수 및 유출수의 용존인과 총인 농도 변화

최동호,조소현,정재운,박현규,최우정,윤광식,김영석,Choi, Dongho,Cho, Sohyun,Jung, Jaewoon,Park, Hyunkyu,Choi, Woojung,Yoon, Kwangsik,Kim, Youngsuk 한국물환경학회 2017 한국물환경학회지 Vol.33 No.4

In order to understand the characteristics of phosphorus in the paddy field, this study analyzed $PO_4-P$ and T-P concentrations of irrigation water, flooding water, and runoff from 2008 to 2010. The variation of phosphorous form within hydrologic cycle around the rice paddy field was investigated using the ratio of $PO_4-P$ to TP. In addition, the correlation between pH, EC, and DO in flooding water was analyzed and the factors affecting phosphorus form in paddy field were investigated. The concentration of T-P in flooding water was high during the survey period, and the concentration of T-P in runoff was assumed to be decreased by dilution due to irrigation and rainfall. On the other hand, the ratio of $PO_4-P$ to T-P was lower in flooding water than those of irrigation water and runoff, which was interpreted to be due to the fact that the phosphorus fertilizer was applied in the paddy field but the adsorption was rapidly occurred to the paddy field by the soil. The similar proportions of $PO_4-P$ to T-P in flooding water and runoff suggest that the form of phosphorus outflowed from the paddy is influenced by the form of phosphorus in the flooding water of paddy field. In addition, DO concentration in flooding water showed negative correlation with the concentrations of $PO_4-P$ and T-P. The effort to survey frequent irrigation water quality data is required for the analysis of phosphorus behavior in the paddy water system since concentration of phosphorous and DO in irrigation water would influence rhe form of phosphorous in flooding water and subsequent runoff.

강우시와 비강우시 BOD 유출 특성 조사 및 원단위 평가

최동호,조소현,황태희,김영석,정재운,최우정,박현규,윤광식,Choi, Dongho,Cho, Sohyun,Hwang, Taehee,Kim, Youngsuk,Jung, Jaewoon,Choi, Woojung,Park, Hyunkyu,Yoon, Kwangsik 한국물환경학회 2017 한국물환경학회지 Vol.33 No.5

The biologic Oxygen Demand (BOD) is a reliable and generally accepted indicator of water pollution by organic pollutants. Accordingly, estimation of BOD export from paddies carries important implications fwith regard to water management in rural areas. In this study, hydrology and BOD concentration were monitored during the period 2008 through 2012, in an effort to understand the characteristics of BOD export from paddy fields. The findings demonstrated that BOD load by rainfall above 50 mm. occupied about 50 % of total load, whereas the load by less than ten mm. rainfall occupied about 29 % of the total load during periods of stormy activity. It therefore seems that it could be possible to reduce the BOD load up to 29 % during storm periods, when drainage control conducted for rainfall less than ten mm.(an amount which is relatively easy to manage). The documented mean loads of storm and non-storm were $17.1kg\;ha^{-1}\;yr^{-1}$ and $11.2kg\;ha^{-1}\;yr^{-1}$, respectively. The BOD load during the significant rainfall period was similar to the renewed unit load by NIER (2014). However, there were substantial differences between unit load and actual load when the non-storm load was incorporated into the BOD load estimation from paddy fields. In view of the foregoing, it is felt that, the non-storm load needs to be further considered and managed for the successful implementation of Total Maximum Daily Load (TMDL) program.

기고 - 서양 건축미 개념의 역사적 전개 연구 (1) _ 아네르 테트라고노스와 아르카디아

최동호,Choi, Dongho 대한건축사협회 2018 建築士 Vol.585 No.-

기고 - 파르테논은 어디서 온 것일까?

최동호,Choi, Dongho 대한건축사협회 2017 建築士 Vol.584 No.-

유전성 대사 질환 동물 모델에서의 줄기 세포 치료

최동호,이동환,정성철,Choi, Dongho,Lee, Dong Hwan,Jung, Sung-Chul 대한유전성대사질환학회 2005 대한유전성대사질환학회지 Vol.5 No.1

Orthotopic liver transplantation is the treatment of choice for inherited metabolic diseases. However, the supply of donor organs is limiting and therefore many patients cannot benefit from this therapy. In contrast, hepatocytes can be isolated from a single donor liver. They can be transplanted into several recipients, and this procedure may help overcome the shortage of donor livers. A great deal of work with animal models indicates that hepatocytes transplanted into the liver or spleen can survive, function, and participate in the normal regenerative process. Recent clinical studies suggest that hepatocyte transplantation may be useful for bridging patients to whole organ transplantation and for providing metabolic support during liver failure and for replacing whole organ transplantation in certain inherited metabolic diseases. Nowadays, hepatocytes from various stem cells have been regarded as an another cell source for treatment of inherited metabolic diseases. Although cell therapy using stem cells for inherited metabolic disease patient has been accepted only as an experimental trial yet, hepatocytes from stem cells can solve a lot of obstacles in the treatment of inherited metabolic diseases.

기고 - 서양 건축미 개념의 역사적 전개 연구 (2) _ 아네르 테트라고노스와 아르카디아

최동호,Choi, Dongho 대한건축사협회 2018 建築士 Vol.586 No.-

벽체 구조 내화성능 분류체계 설정을 위한 실험적 연구

최동호,김대회,Choi. Dongho,Kim. Daehoi 한국방재학회 2012 한국방재학회논문집 Vol.12 No.4

건축물은 화재시 그 피해를 최소화하기 위해 건축물 주요 구조부를 일정 수준의 내화구조로 시공하고 있다. 현재 국내에서는 이러한 주요 구조부의 내화성능을 정부에서 확인하여 인정한 법정 내화구조를 규정하고 있으나 외국에 비하여 내화성능 및 구조의 구분없이 일률적으로 내화성능을 규정하고 있으며, 이경우도 규정된 후 상당한 시일이 경과되어 최근에 적용되는 건축재료 및 공법기술을 적절히 수용하지 못하고 있는 실정이다. 이에 따라 현재의 법정내화구조에 대한 성능확인 등을 통한 내화성능을 재설정할 필요가 있으며, 이에 본 연구에서는 국내 법정내화구조중 벽체 구조를 대상으로 내화성능을 평가한 후 각 구조별로 법정내화구조를 세분화한 기초자료를 제시하였다. To minimize the damages under fire conditions in buildings, the main structural members of buildings shall be fire-resistance-rated structural members. The relevant authority specifies the prescriptive fire-resistance-rated structural members which have 3-hour fire rating equally without any classification in building laws at present unlike foreign countries. But, these prescriptive fire-resistance-rated structural members don`t properly reflect the recent construction materials and the technical development of methods of construction as a long time has passed. Consequently, it is needed to specify so that the fire resistance performance of structural members can be departmentalized according to the detail design and applied part and to improve the relevant system based on the test materials of fire-resistance-rated structural members economically and efficiently. This study was intended to give the fundamental materials that prescriptive fire-resistance-rated walls are departmentalized as each structure by evaluating the fire resistance performance of prescriptive fire-resistance-rated walls.

기고 - 서양 건축미 개념의 역사적 전개 연구 (3) _ 아네르 테트라고노스와 아르카디아

최동호,Choi, Dongho 대한건축사협회 2018 建築士 Vol.587 No.-

인식적 양상 문장의 의미론에 있어서의관점투영적 파라미터 도입의 필요성과온건한 관점투영 상대주의에 대한 옹호

최동호(Dongho Choi) 철학연구회 2015 哲學硏究 Vol.0 No.110

The expression ‘The key might be in the drawer’ is relevant to the epistemic information state of the utterer and is called “epistemic modals”. The main problem of epistemic modal sentence is as follows: according to which agent is the meaning or the truth value of the epistemic modal sentence determined? In regard to this topic, the two prominent theories are contextualism and relativism. Roughly speaking, contextualism is focused on the speaker or the speaker’s information state, while by contrast, relativism is focused on the assessor or the assessor’s information state. In this paper, my goal is to try and argue for which theory, among contextualism, relativism, or a third alternative, is the best. Specifically, I will argue that the perspective-projective relativism for epistemic modal sentences is the most plausible. My point is that the determination of an agent’s information state in epistemic modals must become more complex than it is now in order to deal with various cases. I think that beyond the speaker and the assessor, the elements of a judge, a judgment-attributor, a meta-judgment-attributor and descriptive informational state should be considered as an addition. I will call the view that include only a judge and a judgement-attributor ‘the moderate perspective-projective relativism’ and will restrict discussion to moderate view in this paper.

국립환경과학원 강우유출조사방법을 이용한 논 원단위 산정

최동호 ( Dongho Choi ),윤광식 ( Kwangsik Yoon ),정재운 ( Jaewoon Jung ),유승환 ( Seunghwan Yoo ) 한국농공학회 2015 한국농공학회 학술대회초록집 Vol.2015 No.-

환경부에서는 비점오염원의 합리적이고 과학적인 관리를 위해서 1995년 도시, 논, 밭, 산림, 목장 용지에 대해서 수문 및 수질 모니터링을 수행하여 유효우량비법으로 단일피복에 대한 BOD, COD, SS, T-N, T-P의 원단위를 산정하였다. 원단위는 수질오염총량관리제에 있어, 개발의 규제와 관련된 중요한 인자이며, 현재 사용하고 있는 논의 원단위는 BOD 2.3 kg/km²/day, COD 6.16 kg/km²/day, SS 19.7 kg/km²/day, T-N 6.56 kg/km²/day, T-P 0.61 kg/km²/day 이다. 하지만, 20여년이 지난 현재 기상의 변화, 영농활동의 변화와 더불어 논 비점오염의 유출특성을 고려하여 환경부에서는 새로운 원단위 산정방법을 제시하였으며, 단일토지피복지역에 대한 모니터링을 수행하였다. 따라서 본 연구에서는 논에서의 원단위 산정을 위해 2009년부터 2012년까지 영산강수계 논 유역과 섬진강 수계 논유역에서 강우시 및 비강우시 수문 및 수질 모니터링을 통해 관측 부하량을 산정하였으며, 관측된 강우유출수(수문, 수질)자료를 새로운 원단위 산정방법으로 논 원단위를 산정하였다. 두 시험지구의 관측부하량은 BOD의 경우 13.1~35.4(평균: 21.6) kg/ha, COD의 경우 38.6~66.8(평균: 52.9) kg/ha, SS의 경우 150.9~431.9(평균: 304.4) kg/ha, T-N의 경우 6.2~21.1(평균: 12.1) kg/ha, T-P의 경우 0.5~3.2(평균: 2.0) kg/ha 였으며, 관측된 수질항목별 평균 부하량을 단위면적당 일 부하량으로 환산하면 BOD 5.92 kg/km²/day, COD 14.50 kg/km²/day, SS 83.39kg/km²/day, T-N 3.31 kg/km²/day, T-P 0.56 kg/km²/day로 나타났다. 국립환경과학원 강우유출수 조사방법으로 산정된 BOD 5.46 kg/km²/day, COD 14.62 kg/km²/day, SS 77.53 kg/km²/day, T-N 3.99kg/km²/day, T-P 0.55 kg/km²/day 였다. 따라서, 강우유출수 조사방법으로 산정된 수질항목별 원단위는 수질항목별(BOD, COD, SS, T-N, T-P) 관측 부하량을 잘 반영하는 것으로 나타났다.