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공동주택내 이산화질소(NO2) 및 휘발성유기화합물(VOCs) 노출에 따른 건강 위해성 평가
Jung,Soon-Won,Yang,Won-Ho,Son,Bu-Soon 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4
Indoor air quality has become a topic of interest and concern. Especially changes in construction design and the increased use of synthetic products may result in an increasing of complaints and health effects about the quality of indoor air at home. In this study, nitrogen dioxide(NO2) and volatile organic compounds(VOCs) within new and established apartments on the basis of 4 years of building year were measured every 3 days consecutively during 60 days. We selected each 10 house in Seoul, Asan and Daegu, respectively, and produced risk numbers for hazard quotients, and predicted increases in incidence of cancer. The calculations were made for the adult with default exposure values and also made for a worst case scenario using Monte-Carlo simulation as describing the reasonable exposure(RME). Mean of Monte carlo analysis by benzene, in the construction under 4 years (male: 9.2105, female: 1.0×104) and over 4years (male: 6.8×105, female: 8.3×105) exceeded 106 of permitted standards in US EPA, RME of Monte carlo analysis. In construction under 4 years (male: 9.9×103, female: 9.6×103) and over 4years (male: 9.8×103, female: 7.8×103) exceeded 104 of maximum permitted standards in US EPA. The hazard index of non-carcinogenic pollutants by nitrogen dioxide, toluene, m,p-xylene and o-xylene, both male and female in apartment constructed under 4 years and over 4 years was found less than the permitted standards of hazardous health effects in CTE. Significant cancer risks and non-cancer hazard quotients were predicted in under 4 years of building year.
( Jae Won Byun ),( Kyung Hyun Lee ),( Ha Young Kim ),( Soon Seek Yoon ),( Ji Youl Jung1 ),( Woo Seog Jeong1 ),( Jae Ku Oem ),( Jong Soo Lim ),( Myoung Heon Lee ),( You Chan Bae ) 한국예방수의학회(구 한국수의공중보건학회) 2013 예방수의학회지 Vol.37 No.1
Nine cattle among 18 in a native Korean herd died or were euthanized within 3 days. The affected cattle showed cowshed. The pigs and dogs had been fed leftover food originating from nearby restaurants, and the cattle could presumably reach the contaminated food in the pig troughs. Necropsy revealed a few chicken bones and red pepper pieces as well as large amounts of grain and rice straw hay mixed in the rumen. Botulism type D was isolated in the ruminal contents of one of the cattle. We speculated that the outbreak was associated with the cattle incidentally eating presumably contaminated leftover food from the pig trough.
하수처리장 적용을 위한Semi-카플란 수차가 장착된 마이크로수력발전 시스템
채규정(Kyu Jung Chae),김동수(Dong Soo Kim),천경호(Kyung Ho Cheon),김원경(Won Kyoung Kim),김정연(Jung Yeon Kim),이철형(Chul Hyung Lee),박완순(Wan Soon Park) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.5
소수력발전은 하수처리장 에너지 자립을 위한 효과적인 대안이다. 본 연구는 유량변동이 크고 유효낙차가 낮은 중소형하수처리장(기흥레스피아) 적용을 위해 피치조절형 세미카플란(semi-kaplan) 마이크로수력발전의 적용 타당성을 평가하였다. 가변피치 semi-kaplan 수차는 유량조절을 위한 가이드베인은 생략하고 피치조절형 런너를 장착하여 기계적 결함은 줄이면서 유량변동이 큰 처리장에 특화된 기술이다. 마이크로수력발전 시스템은 설계조건(유량 0.35 m3/s, 유효낙차 4.7 m)에서 90.2%의 수차효율 달성이 가능하였고 발전용량은 13.4 kW로 산정되었다. 설비가동률 74%로 가동 시 연간 약 86.8 MWh 에너지 생산을 통해 2.1%의 에너지 자립이 가능하고 이는 연간 49톤의 CO₂ 감축효과와 맞먹는다. 경제성 평가결과 초기 건설공사비가 200,000,000원 이하인 경우에는 내부수익률은 6.1%, 순현가는 15,539,000원, 편익-비용률은 1.08, 투자회수년은 15.5년으로 경제성이 충분한 것으로 나타났다. Small scale hydropower is one of most attractive and cost-effective energy technologies for installation within sewage treatment plants. This study was conducted to evaluate the potential of a semi-kaplan micro-hydropower (MHP) system for application to sewage treatment plants with high flow fluctuations and a low head. The semi-kaplan MHP is equipped with an adjustable runner blade, and is without a guide vane, so as to reduce the incidence of mechanical problems. A MHP rating 13.4 kWp with a semi-kaplan turbine has been considered for Kiheung Respia sewage treatment plant, and this installation is estimated to generate 86.8 MWh of electricity annually, which is enough to supply electricity to over 25 households, and equivalent to an annual reduction of 49 ton CO₂. The semi-kaplan turbine showed a 90.2% energy conversion efficiency at the design flow rate of 0.35 m3/s and net head of 4.7 m, and was adaptable to a wide range of flow fluctuations. Through the MHP operation, approximately 2.1% of total electricity demand of Kiheung Respia sewage treatment plant will be achievable. Based on financial analysis, an exploiting MHP is considered economically acceptable with an internal rate of return of 6.1%, net present value of 15,539,000 Korean Won, benefit- cost ratio of 1.08, and payback year of 15.5, respectively, if initial investment cost is 200,000,000 Korean Won.
UV 센서 응용을 위한 SiC MIS 소자에 관한 연구
구경완(Kyung一Wan Koo),정순원(Soon一Won Jung) 호서대학교 공업기술연구소 2006 공업기술연구 논문집 Vol.25 No.1
In this paper, we propose aluminum nitride(AlN) thin film as gate insulating material instead of SiC )2 on 6H~SiC MIS devices. For quite a low lattice misfit with SiC, AIN is as attractive as new gate insulating material in SiC devices. The fabrication of aluminium nitride (AIN) films directly on 6 H-S 1 ᄂ(0001) substrates by reactive magnetron sputtering method has been performed with rapid thermal annealing at a temperature range 01 ZOO 1000 °C in nitrogen ambient for enhancement of crystallization of films. The structural properties of AIN films on 6H-SiC(0001) by RTA analysed by XRD(X-Ray diffraction). The A1N(0002) peaks was clearly found. The dielectric constant of deposited films was obtained as around 8.4 from the accumulation region of capacitance-voltage curve. It is almost the same value with the bulk AIN. Also, the gate leakage current density of the MIS capacitor was 10 9 A/cm2 order within the electric field of 2 MV/cm. The amount of Djt was evaluated as about 5X1010 eV_1cm at a location of 0.5 eV from the midgap.
( Soon Kyu Lee ),( Jeong Won Jang ),( Heechul Nam ),( Pil Soo Sung ),( Hee Yeon Kim ),( Jung Hyun Kwon ),( Sung Won Lee ),( Do Seon Song ),( Chang Wook Kim ),( Myeong Jun Song ),( Si Hyun Bae ),( Jong 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Sofarenib has been used for advanced hepatocellular carcinoma (HCC) over the last decade. However, the efficacy of sorafenib in recurrent HCC after liver transplantation (LT) compared to the non-LT settings has not been elucidated. Moreover, factors affecting sorafenib efficacy in the LT group have not been extensively clarified. Methods: Between 2008 and 2019, a total of 832 HCC patients (790 in the non-LT group and 42 in the LT group) treated with sorafenib were consecutively enrolled in our study. Primary outcome was overall survival (OS) in the non-LT and LT groups. Secondary outcomes were objective response rate (ORR), disease control rate (DCR) and time to progression (TTP). Subgroup analyses according to metastasis, liver function and intrahepatic tumor burden were also examined. Results: Overall, the median follow-up duration was 152.5 days. The LT group had younger age, better Child-Turcotte-Pugh (CTP) scores, smaller intrahepatic tumors and lower AFP levels than those of the non-LT group. The LT group showed significantly better OS (16.8 vs. 7.1 months, P<0.001, respectively) than the non-LT group. Moreover, the LT group had significantly longer TTP, higher ORR and DCR than in the non-LT group. The superior efficacy of sorafenib in the LT versus non-LT groups was corroborated in detailed sub-group analyses stratified by metastasis or CTP class A. However, in patients with small or no intrahepatic tumor, there were no significant differences in OS, TTP, ORR and DCR between the two groups. Conclusions: Sorafenib in transplant patients is more effective and provide better outcomes than in non-transplant patients. Intrahepatic tumor burden as well as underlying hepatic function is a crucial determinant for the effectiveness of sorafenib.
A New Early-Maturing, Lodging Resistant and High-Yielding Pea Cultivar "Dacheong"
Won Young Han,Myoung Gun Choung,Chan Sik Jung,In Youl Baek,Sea Kwan Oh,Doo Chull Shin,Su Dong Kim,Soon Chul Kim,Dong Kwan Kim,Chang Ki Son 한국육종학회 2003 한국육종학회지 Vol.35 No.4
A new pea variety, “Dacheong”, was developed at the National Yeongnam Agricultural Experiment Station in 2002. It was selected from the cross Frescoloy/Upton//YP113(Sparkle/Early Bird)/YP115(Sparkle/Euisungjaerae) in 1992. The preliminary, advanced, and r
Prevalence state of canine brucellosis in South Korea during 2015 and 2016
Jung, Ji-Youl,Yoon, Soon-Seek,Lee, Seung-Hee,Park, Jung-Won,Lee, Jin-Ju,Her, Moon,So, ByungJae,Kim, Jae-Hoon The Korean Society of Veterinary Science 2018 大韓獸醫學會誌 Vol.58 No.3
We investigated the prevalence of canine brucellosis in companion and stray dogs between March 2015 and December 2016 and determined the disease characteristics based on the geographic distribution, sex and age of the dogs in South Korea. We conducted a large-scale survey using serological and bacteriological tests. Samples were collected from 2,394 dogs (1,825 companions and 569 strays). Thirty (1.3%) samples were positive for Brucella canis antibodies including 16 (0.9%) from companion dogs and 14 (2.5%) from stray dogs. Two (1.0%) of the 196 samples cultured from the stray dogs were positive. When compared with male dogs, the female companion and stray dogs had a significantly higher prevalence of brucellosis. Moreover, the prevalence of canine brucellosis was significantly higher in stray dogs older than 6 years and the prevalence of the disease in companion dogs was highest in Incheon (2.1%) and Jeolla (2.1%) provinces. Stray dogs from the Daejeon metropolitan area had the highest prevalence of brucellosis (7.9%). National control measures for canine brucellosis have not previously been implemented. Our findings suggest that appropriate screening tests and control measures are necessary to improve the health of dogs and to protect public health in Korea, particularly with the rapid growth of the companion animal industry.