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임신 제일삼분기 약물 및 진단용 방사선 노출 임신부에서 기형 발생 위험에 관한 근거중심적 상담의 효과
한정열(J . Y . Han),박소연(S . Y . Park),김영미(Y . M . Kim),김진우(J . W . Kim),정상희(S . H . Jung),정영철(Y . C . Chung),최준식(J . S . Choi),안현경(H . K . Ahn),오민정(M . J . Oh),류현미(H . M . Ryu),김문영(M . Y . Kim),궁미경(M . K 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.1
N/A Objective : To evaluate the effectiveness of evidence-based teratogenic risk counseling by relevant medical literature concerning pregnant women exposed to medication or diagnostic radiation during the first trimester. Methods : Between January 2001 and April 2001, 67 pregnant women exposed to medication or diagnostic radiation visited our clinic for teratogenic risk counseling. We counseld the teratogenic risk of their fetus by relevant medical literature.Also, We measured the score to terminate pregnancy and the perceptive risk on their fetus with major congenital anomaly using 10cm visual analogue scale. Results : None of them were exposed to any known teratogenic drugs or radiation in any teratogenic doses. Other physicians had already recommended, to about a third of patients, pregnancy termination. Their perceptive estimation on the risk of major congenital malformation in the general population was 4.6±1.1%. The perceptive risk on their fetus with major congenital anomaly decreased from 39.5±3.1% before consultation to 10.8±1.6% thereafter (P<0.05). Also, their score on the visual analogue scale to terminate pregnancy was 6.4±2.7 before consultation and 9.1±1.6 thereafter. Their tendency to terminate pregnancy significantly decreased after consultation (P<0.05). Conclusion : Evidence-based counseling for pregnant women exposed to medication or diagnostic radiation during the first trimester may prevent unnecessary pregnancy terminations as well as reduce anxiety.
다운증후군의 산전진단을 위한 다양한 선별검사의 기여율 비교 - 산전 및 신생아때 진단된 96 례 분석 -
한정열(J . Y . Han),김문영(Y. M . Kim),조준형(J . H . Cho),안현경(H . K . Ahn),류현미(H . M . Ryu),김진미(J . M . Kim),김영미(Y . M . Kim),박소연(S . Y . Park),한혜경(H . K . Han),이영호(Y . H . Lee),양재혁(J . H . Yang) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.10
연구의 목적은 다운증후군을 산전진단하기 위한 다양한 산전선별검사 (나이; 35세 이상, 임산부 혈청 marker를 이용한 triple test, 초음파; 비정상 소견, 후경부 투명대 (nuchal translucency), 후경부두께 (nuchal fold thickness))의 기여율를 비교하기 위한 것이다. 1990년 1월부터 1999년 9월까지 본원에서 산전 및 산후에 진단된 례는 총 96례 이었다. 산전 및 신생아기에 진단된 다운증후군의 빈도는 각각 68례 (71 %), 28례 (29 %)였다. 다운증후군 태아를 임신했던 임산부의 평균연령은 33±5.7세이다. 다운증후군의 1,000분만당 연도별 빈도율은 1990년부터 1999년까지 각각 0.4, 1.3, 0.7, 0.7, 1.6, 0.7, 1.2, 2.2, 2.0, 그리고 2.3 (Y=0.28±0.18 year, P=0.01)이었다. 산전진단된 다운증후군의 비율 (%)은 지난 10년간 각각 0 (0/2), 43 (3/7), 50 (2/4), 25 (1/4), 56 (5/9), 100 (5/5), 71 (5/7), 78 (14/18), 78 (14/18), 그리고 89 (17/19) (Y=12.9±8.9 year, P=0.000) 이었다. 다운증후군을 산전진단하기 위한 다양한 산전선별 검사에 따른 기여율은 35세이상의 연령에 의하면 30.2±5.6 %, triple test의 경우 18.2±3.4 %, 초음파에 의한 경우 51.7±6.3 % 이며, 초음파에 의한 산전 선별 검사가 통계적으로 유의하게 연령이나 triple test에 의한 경우 보다 다운증후군의 산전진단에 기여율이 높았다. (P=0.008) 결론적으로 본 연구에 의하면 지난 10년 동안 다운증후군을 산전 진단하기 위한 여러 선별 검사방법의 적용은 효율적이었으며, 특히 초음파에서 다양한 소견을 이용한 다운증후군의 산전선별검사는 연령이나 triple test 보다는 더욱더 의미가 있다고 추론된다. Objective : The purpose of this study was comparison of the contribution rate for prenatal diagnosis of Down syndrome using various screening methods (Age: greater than or equal to 35 years old, Serum markers: Triple test, Ultrasonography: abnormal sonographic findings, nuchal translucency, nuchal fold thickness).Methods : Total 96 cases of Down syndrome, prenatally or postnatally diagnosed between Jan. 1990 and Sept. 1999, made up the study population. We got the contribution rate of various prenatal screening methods of down syndrome, and obtained the efficiency of various screening program applied for last 10 years. Results : The frequencies of Down syndrome confirmed in prenatal and postnatal were 68 (71%) and 28 (29%) in respectively. The mean age of mother of Down syndrome fetus was 33.0±5.7 years old. The frequency rate of Down syndrome was 0.4, 1.3, 0.7, 0.7, 1.6, 0.7, 1.2, 2.2, 2.0 and 2.3 a 1,000 deliveries from 1990 to 1999 (Y= 0.28+0.18 year, P=0.01). The percentage of Down syndrome diagnosed prenatally was 0 (0/2), 43 (3/7), 50 (2/4), 25 (1/4), 56 (5/9), 100 (5/5), 71 (5/7), 78 (14/18), 78 (14/18) and 89 (17/19) from 1990 to 1999 (Y= 12.9+8.9 year, P=0.000). The contribution rate of prenatal diagnosis for Down syndrome was 30.2±5.6% by age, 18.2±3.4% by triple test and 51.7±6.3% by ultrasonography, and was significantly difference among each screen methods (P=0.008). Conclusions : This study shows that our prenatal screening program is highly effective to detect Down syndrome and especially ultrasonographic findings (abnormal sono findings, Nuchal translucency, Nuchal fold thickness) may be more important than that of age or Triple test to detect the Down syndrome prenatally.
HCNG용 버너시스템에서 Tail Gas 첨가 시 연소특성
한정옥(J. O Han),이중성(J. S Lee),김형태(H. T Kim),김상민(S. M Kim),이영철(Y. C Lee),김용철(Y. C Kim),홍성호(S. H Hong) 한국연소학회 2015 한국연소학회지 Vol.20 No.2
The combustion characteristics of metal fiber burner fueled natural gas with tail gas produced from reforming process were analyzed on the point of flame stability and excess air conditions. Also, it was analyzed the effect of energy efficiency improvement due to decrease the fuel input in reforming system by using residue gases. As a results, it was confirmed that tail gas including hydrogen, CO and CO2 could be directly injected without any change of air control system in natural gas burner and also energy efficiency was increased up to 30% maintained stable combustion.
50[W]급 태양전지의 가장 구현을 위한 모듈의 직ㆍ병렬 연결 특성 해석 및 제어
한정만(J.M.Han),류태규(T.G.Ryu),고재석(J.S.Gho),최규하(G.H.Choe) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
The solar energy is purity and infinity Solar power converter were used to convert the electrical energy from the solar arrays to a stable and reliable power source So many countries research this solar energy system. The photovoltaic system is construct many solar cell array.<br/> In this paper, new implementation solar system was showed buck converter that V-I curve produced This system can be used to study the short-term and long-term performances of solar cell and efficiency<br/> This system is a far more cost effective and reliable replacement for field and outdoor flight testing<br/> Study of buck converter, analysis and control series or parallels connection characteristics of solar cell array.
태양전지 가상 구현 모듈의 직ㆍ병렬 특성 해석 및 제어
한정만(J.M. Han),류태규(T.G. Ryu),유재현(J.H. Yoo),고재석(J.S. Gho),최규하(G.H. Choe) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
The solar energy is purity and infinity. Solar power converter were used to convert the electrical energy from the solar arrays to a stable and reliable power source. So much country research this solar energy system. The photovoltaic system is construct many solar cell array. In this paper, new implementation solar system was showed buck converter that V-I curve produced. This system can be used to study the short-term and long-term performances of solar cell and efficiency This system is a far more cost effective and reliable replacement for field and outdoor flight testing.<br/> Study of buck converter, analysis and control shun t ?series connection characteristics of solar cell array.<br/>