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

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.

특발성 혈소판감소성 자반증 환자에서 발생된 그레이브스병 1예

김여주,이규택,김상진,김휘준 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

The autoimmune nature of idiopathic thrombocytopenic purpura(ITP) and Graves' disease has been well established. In both disease, circulating immunoglobulins are believed to be involved in the pathogenesis and transplacental transfer of both disease is the ultimate proof of the importance of the humoral mechanism involved. Because of the tendency of autoimmune disease to cluster in the same individual or members of the same family, simultaneous incidence of ITP and Graves' disease is to be expected. However, in clinical practice, it has been described only rare. Therefore, we report here the case of a patient suffering sequentially from ITP and Geaves' disease with the literature.

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.

급성 척수손상시 세포사망의 특성

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

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.

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.

악관절 융기 증강술을 통한 습관성 악관절 탈구환자의 치험례

김일규,신주호,오성섭,최진호,김형돈,오남식,김의성 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2

Recurrent mandibular dislocation is frequent morbidity of temporomandibular joint relatively. There are many etiologic causes in TMJ disorders but, difficult to find obvious one. Various treatment methods have been utilized for a mandibular dislocation. It is categorized into two groups broadly - nonsurgical or surgical methods. The basic rationale of the surgical method is to allow free movement of the condyle by reducing height of articular eminence or to limit anterior excessive movement of the condyle by increasing height of articular eminence or soft tissue anchoring procedure. In this case, 69 year-old woman was treated by augmentation of the articular eminence with mandibular symphysial bone graft leading to osteosynthesis without difficulty. As a result, favorable postoperative outcome was obtained functionally without any complication or recurrence.

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.