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장기 모니터링을 통한 환경친화형 인공습지 하수처리장의 수질정화효율 평가
서동철 ( Dong Cheol Seo ),조인성 ( In Seong Jo ),임석천 ( Seok Cheon Lim ),이병주 ( Byeong Ju Lee ),박성규 ( Seong Kyu Park ),천영석 ( Yeong Seok Cheon ),박종환 ( Jong Hwan Park ),이홍재 ( Hong Jae Lee ),조주식 ( Ju Sik Cho ),허 한국환경농학회 2009 한국환경농학회지 Vol.28 No.2
A constructed wetland which was composed of aerobic and anaerobic areas was evaluated for 3 years to effectively treat the sewage produced in farming and fishing communities. For 3 years in a constructed wetland, biochemical oxygen demand(BOD), chemical oxygen demand(COD), suspended solids(SS), total nitrogen(T-N), and total phosphorus(T-P) in effluent were 0.2~11.8, 1.0~41.9, 1.1~6.5, 4~60 and 0.02~3.51 mg/L, respectively. Removal rate of BOD, COD and SS in effluent were 97, 92 and 99%, respectively, in the third year. As time goes by, removal rate of T-N and T-P in treated water in aerobic area and effluent were gradually increased in a constructed wetland. In the third year, removal rate in effluent were 62 and 73%, respectively. By the seasons, removal rate of BOD, COD, SS, T-N and T-P were 97~98, 87~91, 99, 43~61 and 76~86%, respectively. Removal rate of BOD, COD, SS and T-P were not affected by the seasons, but that of T-N in winter and spring were decreased than the other seasons.
가격차 반환제도 하의 기간별 가격설정 전략: 다재화의 경우
조인성 ( Jo In Seong ) 한국경제통상학회 2004 경제연구 Vol.22 No.1
A two-good, two-period model of the most-favored-customer policy (MFCP) is presented and analyzed in the present paper. The MFCP is a seller`s promise t o reimburse the difference to the today`s buyers when the seller reduces the price tomorrow. The MFCP is compared with the ordinary-sale policy (OSP) under which every price paid is final. Our major finding includes the followings. If the high-valuation consumers in each group is substantially small, then the OSP is better for the seller than the MFCP. On the other hand, if one of the markets has a large size of the high-valuation consumers then it is optimal for the seller to adopt the MFCP.
대구지역 의료기관의 CT, MRI 보유 현황과 정도관리에 관한 담당 방사선사들의 인식 조사
이창석,조인성,이상욱,정석종,성아라,이현정,형미림,성지수,박창희,Lee, Chang-Suk,Jo, In-Seong,Lee, Sang-Uk,Jeong, Seok-Jong,Sung, A-Ra,Lee, Hyun-Jung,Hyung, Mi-Rim,Seong, Ji-Su,Park, Chang-Hee 대한디지털의료영상학회 2011 대한디지털의료영상학회논문지 Vol.13 No.3
This study concerns the present possession of CT and MRI machines in Daegu and the technologists' awareness of Quality Control. the study was conducted by visiting forty medical institutions as well as a survey. The survey was carried out by technologists responsible for CT and MRI. CT and MRI machines have only been used in medical institutions in Daegu for a short period. The study revealed that most of them have been acquired by those institutions recently. Most of the technologists who participated in the study are aware of the (prescribed) Quality Control measures and conduct regular inspections in accordance with the quality control chart, however some of them do not.
단일 통풍형과 이중 통풍형 인공습지시스템의 하수처리 효율 비교
서동철 ( Dong Cheol Seo ),임석천 ( Seok Cheon Lim ),조인성 ( In Seong Jo ),이병주 ( Byeong Ju Lee ),이홍재 ( Hong Jae Lee ),김상돈 ( Sang Don Kim ),이준배 ( Jun Bae Lee ),조주식 ( Ju Sik Cho ),허종수 ( Jong Soo Heo ) 한국환경농학회 2009 한국환경농학회지 Vol.28 No.3
To develop environmentally friendly constructed wetlands(CWs) for treating domestic sewage which was produced in farming and fishing village, the efficiency of water treatment at different ventilation systems in the vertical bed, depths of horizontal bed, and sewage loads was investigated. In the vertical bed, BOD and COD by duplex ventilation system were lower than those by single ventilation system. But T-N and T-P concentrations by both ventilation systems in the vertical bed were little different. In the horizontal bed, BOD, COD, T-N and T-P in 1.0 m and 1.3 m depths were little different. To reduce the CWs` area and to improve the pollutant removal efficiencies, the optimum depth of horizontal bed was 1.3 m. In single and duplex ventilation CWs, the removal rate of BOD, COD, SS, T-N and T-P decreased slightly with the sewage load increases. In same sewage load conditions, the removal rates of BOD, COD, SS, T-N and T-P by duplex ventilation CWs were higher than those by single ventilation CWs. In summary, to effectively treat domestic sewage from farming and fishing village, the optimum constructed wetlands would be the duplex ventilation CWs.
조강시멘트와 경화촉진제가 압축강도에 미치는 영향에 대한 실험적 연구
민태범 ( Tae Beom Min ),조인성 ( In Seong Jo ),이한승 ( Han Seung Lee ) 한국건축시공학회 2013 한국건축시공학회 학술발표대회 논문집 Vol.13 No.1
In order to develop concrete generating compressive strength of 15MPa 15MPa∼∼30MPa aging for 66∼∼12 hours in the room temperature curing, Hardening accelerator containing Ca 2+ mixed with rapid hardening portland cement containing CC33S S in quantity. The result was that the more addictive contents of Hardening accelerator is, the more greatly early compressive strength was improved. That s because the composition of Ca(OH) 22 was mass-produced at early-ages.
C3S 자극 경화촉진제를 사용한 초조강 콘크리트 개발에 관한 실험적 연구
민태범 ( Tae Beom Min ),조인성 ( In Seong Jo ),이한승 ( Han Seung Lee ) 한국건축시공학회 2014 한국건축시공학회 학술발표대회 논문집 Vol.14 No.1
In order to develop concrete generating compressive strength of 10MPa 10MPa∼∼15MPa aging for 6hours in the room temperature curing, Hardening accelerator containing Ca 2+ mixed with rapid hardening portland cement containing CC33S S in quantity. The result was that the more addictive contents of Hardening accelerator is, the more greatly early compressive strength was improved. That That’’s because the composition of Ca(OH) 22 was mass-produced at early-ages.