이면성 및 도플러 심초음파도를 이용하여 진단한 선천성 거대 좌회선지-좌심실 관동맥루

진승원,박준철,이영중,유병현,박현옥,김용주,윤호중,김재형,홍순조,최규보,권종범,원용순,박건 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

다분력 로드셀을 이용한 지능형 크레인 시스템 개발

주진원, 신규하 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

In this paper, a model of the intelligent crane system which is monitoring the weight and location of the load is developed to help prevent the overthrow or failure of cranes. The system consists of mechanical structure including booms, electrical motion cylinders and a threecomponent loadcell. Finite element deformation analysis was performed to design the loadcell and to predict output strains from the Wheatstone bridge circuit composed of four strain gages. The actively compensation method was used to minimized the coupling errors from the calibration results of the three-component loadcell. As a result, the coupling strains are completely eliminated. The operating test results show that informations obtained from the computer program is in good agreement with actual data

지하철 시설내 부유먼지에 함유된 돌연변이원의 생물학적 영향 평가

김진규,신해식,이정주,김균,이즌홍 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.3

Airborne pollutants in the subway facilities can be potentially harmful to the health of passengers. This study was designed to examine whether the suspended particulates have mutagenic or carcinogenic effect on the plant cell systems. Total suspended particulates were collected with a high volume air sampler, in the entrance, the waiting room, and the platform of each subway station. The biological end-points in this experiment were the pink mutations in stamen hairs and micronuclei in the pollen mother cells of Tradescantia. The exudates were collected by shaking the filter papers from the sampler in distilled water for 24 hours. All the plant cuttings exposed to the exudates resulted in positive responses. The micronucleus assay proved more reliable and sensitive to the test than the stamen hair assay. The results indicate that the air particulates can give an adverse effect on the health of subway passengers.

급성 척수손상시 세포사망의 특성

진동규,김영수,윤도흠,주진양,이경희,성제경 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.12

Vibrio parahemolyticus에 대한 한방처방 [方藥合編] 및 그 단미제의 항균활성에 관한 연구

마진열,김진숙,신순식,정규용,박갑주 한국한의학연구원 1999 한국한의학연구원논문집 Vol.5 No.1

Vibrio are become prevailing if superficial temperature of ocean is raised and their activities of area are expanded and most of ocean creatures (fishes, oysters etc) are polluted with vibrio. The one who has taken these polluted fishes and aysters uncooked caused foodpoisoning and diarrhea from Vibrio. Frequencise of these diseases breakout is disposed in westsea shore of Korea. According to ancient and traditional Korean medical book -『Bangyak Happyeon』(Collection of Local Medicines, 1884) - and their single prescibes, we carried out experiment check the activities of natural medicinal effects on Vibrio parahemolyticus. The prescriptions of trial materials are processed from extraction boiling water and 80% methanol and followed freeze dried and adsorbed to every discs in dosage of 10mg. Gentamycin of 10mg were used for control. The result of compound prescription displayed special diseases in antimicrobial activities of boiling water and MeOH extraction compared with control. In compound prescription, extraction MeOH of Sashinhwan(clear zone : 17mm) presented extraordinaire antimicrobial activity. In single prescription, extraction of boiling water (clear zone : 16mm) and MeOH(clear zone : 18mm) of Fructus Chebulae presented extraordinaire antimicrobial activity. The MBC of Fructus Chebulae extracts was expressed in boiling water (1.28mg/ml) and MeOH(0.64mg/ml).

인터넷 서비스 유형분석 모델 개발에 관한 연구

박주석,박진휘,이한규 한국경영과학회 2001 한국경영과학회 학술대회논문집 Vol.- No.1(2)

Electronic Commerce grows rapidly in the past few years. Also, the power of EC doesn't become weak in the future. The increase of EC market scale provides powerful foundation to the Internet development. Unlike other technology, Internet has several distinctive character. First, As Internet spreads fast to the public, it became the usable technology to them in a short time. Second, Comparing to other technology, the work with using Internet isn't difficult to public so the basis of technology prepared in a short period. Third, Internet applicates all the industry and economic so, it makes economic foundation for making synergy during a short period. These Internet characters influence to EC growing speed which is basement of Internet growth. Due to Digital revolution giving much more influence than last Industrial Revolution, E-Business such as e-Management, B2B, B2C became the survival strategies for enterprise's management efficiency. Owing to emergence of technology like ultrahigh speed data communication, Broadband communication, wireless Internet, Internet TV, IS95C(2.5GB), 3G and activation of internet business, products and service through Internet become realized. Because of this, Supply of products and service through Internet are on the increase. But demand of voice communication become saturated, so increase of profit and sale through it reach the limit. Communication demand for products and service is a growing tendency. Consequently, research about vision and business strategies of Internet service for promoting the business founded on internet required.

관상동맥질환 환자에서 스텐트 시술 후 재협착에 관한 연구

강진환,권영주,박상호,한대희,이상철,김명구,변정득,최병조,심규혁,온영근,현민수,김성구 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background and aims : In the coronary artery disease, a rate of restenosis was much decreased by placement of coronary stent than when percutaneous transluminal coronary angioplasty has been applied, but there are still important clinical problems of restenosis. There has been many progressive studies about various factors contributed to this restenosis. So, we studied a relation between restenosis after placement of coronary stent in the coronary artery disease and many clinical factors, characteristics of stenotic lesion and procedural factors, and also assessed the restenosis rate of various coronary stents. Methods : Total 58 lesions(46 cases of patients ; man 30, woman 16) were evaluated, which has been performed a follow-up coronary angiography after 6 months (mean 188 days) since coronary stent had been placed. Various stents were implanted and assessed a relation between restenosis and many factors. Results : Of 58 lesions were target stenotic studies, there were 22 of restenotic lesions(37.9%), and the restenosis rate wes statistically significant difference in the relation with diabetes mellitus(p<0.05), group of acute myocardial infarction(p<0.05) among clinical diagnosis of ischemic heart disease(stable angina, unstable angina and acute myocardial infarction) in clinical factors and with high dilation pressure of stent(p<0.05) in procedural factors. When the rate of restenosis was evaluated among implanted stents, it was lowest in the Multilink^(®) stent and highest in the Nir Royal^(®) stent(60%). Conclusion : In this study of restenosis and various factors after placement of stents in the coronary artety disease, factors such as diabetes mellitus, group of acute myocardial infarction and a dilation pressure of stent were significant related with restenosis and the restenosis rate of Multilink^(®) stent was lowest and the highest restenosis rate was of Nir Royal^(®) stent.

실내·외 환경의 분진 중 중금속 농도 : 서울시 강서구·양천구 소재의 중학교를 중심으로 In Middle Schools in the Kangseoku and Yangchonku Areas, Seoul

배윤진,김규한,전효택,안주성 이화여자대학교 환경문제연구소 1998 이화환경연구 Vol.2 No.-

도시화 및 산업화에 따른 학교환경의 중금속 오염양상을 평가하기 위해 강서구·양천구에 위치한 31개 중학교의 교실, 특별실, 실외에서 강하분진 시료 총 93개를 채취하여 Cd, Co, Cr, Cu, Ni, Pb, Zn, Mn, Fe의 중금속 원소들의 함량을 측정하고, 다변량통계처리와 연속추출분석 및 전자현미분석을 실시하였으며 양천구의 한 학교에서 4개월간 채집한 부유분진 시료 2개를 전자현미분석하였다. 강서구·양천구 중학교들의 교실, 특별실, 실외 분진의 중금속 원소의 분산양상을 비교한 결과, Cd, Cu, Pb의 함량이 특별실>교실>실외 순으로 나타나 학교 실내의 폐쇄된 공간에서 Cd, Cu, Pb의 농집이 진행되고 있음을 보여주었다. 반면, Mn, Fe의 함량은 실외>특별실>교실 순으로 나타났다. 이러한 경향은 통계적으로 유의적이었다.(P<0.01). 그리고 대부분 학교의 실외시료에서 오염지수(Pollution index)가 1.0이상으로 조사되어 연구지역 학교들의 실외 중금속 오염이 매우 넓은 범위에 걸쳐 진행되고 있는 것으로 나타났다. 시료들에 대한 연속추출분석 결과, 교실, 특별실, 실외별로 중금속 원소들의 화학적 형태 분포상황이 유사하게 나타나 실내의 분진은 주로 외부에서 유입됨을 보여 주었다. 또한 Zn와 Cd의 교환성·수용성 형태가 우세하여 이동도와 생물흡수도가 가장 높을 것으로 나타났다. 전자현미분석에서도 시료채취 학교, 장소 및 용도등에 따른 중금속 존재형태의 차이는 나타나지 않았고 Pb, Zn, Cu 입자의 존재형태를 관찰한 결과, 실내외 중금속 오염이 과거 차량배기에 의한 오염영향과 공업활동에 의한 것으로 판단된다. Indoor and outdoor dry-deposited dust samples were collected from 31 middle school in the Kangseoku and Yangchonku areas in Seoul. Heavy metal concentrations were determined for the dusts from classroom, activity room and playground of each sampling sites. Suspended particulate samples were also investigated for certain periods during this study. Heavy metal dispersion patterns showed concentrations of Cd, Cu and Pb increasing in the order: playground, classroom and activityroom. Whereas Cd, Cu and Pb were highly concentrated in the closed spaces(e.g., activity room), Mn and Fe were high in the order of playground, activityroom and classroom. Most playground dusts exhibited the enhanced heavy metal pollution with a pollution index greater than 1.0. The chemical fractionations of Cd, Cu, Pb and Zn by sequential extraction were consistent between indoor and outdoor dust samples. Cadmium and Zn, mainly associated with exchangeable or water/acid soluble fraction, may have the highest mobility and bioavailability. There were no significant differences im morphological properties of the dust samples analyzed by electron probe microanalysis. It was suggested that outdoor dust may highly contribute to indoor contamination.

일개 대학병원에서 일년간 분리된 반코마이신 내성 장구균의 임상 분자역학적 연구

송진영,김창억,김성욱,우흥정,김미란,이규만,이란,장미화,정희진,김우주 대한화학요법학회 2001 대한화학요법학회지 Vol.19 No.4

목적 : 한강성심병원에서는 2000년 3월 반코마이신내성 장구균이 처음 분리되어, 원내전파를 막기 위한 노력을 하였으나, 분리가 지속되었다. 따라서 이에 대한 좀더 자세하고 객관적인 자료를 얻기 위해 본원에서 분리된 반코마이신내성 장구균에 대한 임상분자 역학적 연구를 시행하게 되었다. 방법 : 2000년 3월부터 2001년 2월까지 한림대학교 한강성심병원에서 분리된 장구균을 대상으로 디스크 확산법, 최소발육억제 농도등의 측정을 통해 반코마이신 내성여부를 확인하였으며, 반코마이신내성 장구균을 대상으로 PFGE를 시행하여 형별 분석을 하였다. 결과 : 분리된 균주는 총 32균주로 모두 E. faecium이었다. 항생제 내성 검사 결과 모두 Van A형이었다. PFGE 결과 1a형이 8검체, 1b형이 5검체, 2a형이 4검체, 2b형이 4검체, 3a형이 2검체, 3b형이 5검체였고, 그 외 4, 5, 6형이 각각 1검체씩이었다. 총 32균주 중 56%(18/32)의 균주가 같은 시기, 같은 병실에서 동일한 PFGE 형을 보이면서 분리되었다. 결론 : 반코마이신내성 장구균의 PFGE 분석 결과 여러 종류의 반코마이신내성 장구균이 유행하였음을 알 수 있다. 그러나 같은 기간, 같은 병실에서 분리된 균주의 PFGE 형이 같은 것이 상당수 있었다. 이는 반코마이신내성 장구균의 원내 전파가 있었음을 의미한다. 따라서 반코마이신내성 장구균의 전파의 발생 및 전파 방지를 위해서는 보다 효과적인 감염관리 활동이 필요할 것으로 생각된다. Background: Vancomycin-resistant enterococci(VRE) have been a rising problem worldwide. In March 2000, VRE was first isolated from a patient in Hangang Sacred Heart hospital. Although efforts to prevent transmission of VRE were performed, isolations continued. So molecular epidemiological study of VRE was done. Method : The minimal inhibitory concentration(MIC) to vancomycin and teicoplanin, and pulsed field gel electrophoresis(PFGE) pattern of VRE isolated from March 2000 to February 2001 were evaluated. Results : 32 VRE were isolated. All of the VRE were Enterococcus faecium and showed Van A resistance phenotype. We found out that a significant number of VRE isolated during same period and in same room, were same PFGE patterns. (18 cases/ 32 isolates= 56%) Conclusion: This study demonstrated the spread of VRE of same PFGE patterns. It suggests the nosocomial spreads of VRE.

폴리머 콘크리트 휨부재의 휨 및 전단거동 특성

연규석,김남길,주명기 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

본 연구에서는 압축강도 1,400 kgf/㎠를 갖는 불포화 폴리에스터 폴리머 콘크리트를 이용하여 제작한 C형 시험체에 대한 편심압축 시험을 통하여 폴리머 콘크리트 휨부재의 응력-변형률 관계를 구명하고 등가직사각형 응력블럭의 파라미터 α,β_1, ν를 산출하였다. 아울러, 인장철근비를 0.038, 0.076 및 0.094로 하고 전단스팬비(a/d)를 1.5, 2.5 및 3.5로하는 9종의 철근 보강 폴리머 콘크리트 보를 제작하고 이에 대한 전단거동을 고찰하였다. 실험결과 등가직사각형 응력블럭의 파라미터 α,β_1, ν는 각각 0.61, 0.73, 0.845로 나타났으며, 사인장강도 및 극한전단강도의 예측식인 ACI 규준식 및 Zsutty 제안식을 수정하여 고강도 폴리머 콘크리트의 전단강도예측식을 제안할 수 있었다. 그러나, 보다 정확한 전단설계를 위해서는 스트럿-타이 모델이나 트러스 모델을 적용한 이론 및 실험적인 연구가 더 이루어져야 할 것이다. In this study, C-shaped specimens have been made with the unsaturated polyester resin of which the compressive strengths is 1,400 kgf/㎠. The stress-strain relations of polymer concrete beam member was examined by using the eccentric compressive test and the output stress block parameters α, β_1, γ were obtained by using the equivalent rectangular stress block. Three different tensile reinforced ratios, 0.038, 0.076, 0.094, and shear span ratios (a/d) 1.5, 2.5, 3.5 were used to make nine kinds of reinforced polymer concretes and the shear behaviors were investigated. The experimental results showed that the parameters, α, β_1, γ, of equivalent rectangular stress block were obtained as 0.61, 0.73, 0.84, respectively. The prediction formula of diagonal strength or the limit shear strength shown in the ACI standard and the Zsutty proposal was modified and applied for the proposal shear strength prediction formula of high-reinforced polymer concrete. In order to do the precise shear design, however, theoretical and experimental researches are thought to be continued by applying the strut-tie model or the truss model.