가토의 뇌동맥류 모형에서 모동맥 및 동맥류 협자에 따른 동맥류 내압의 변화 :기초 연구

김은영,송준혁,김명현,박향권,김성학,신규만,박동빈 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.4

單調增加荷重을 받는 平面 트러스의 複合 非線型 擧動에 關한 硏究

權寧煥,金和中,金明璇,魯德煥 경북대학교 산업기술연구소 1990 産業技術硏究誌 Vol.18 No.-

The object of this study is that develop computer program as being derive simple formula considering complex (material and geometric) nonlinear, and select the most useful truss in efficiency with the analysis Howe truss, Fink truss, Pratt truss and Warren truss. The complex nonlinear behavior is considered in this paper, so is acquired following results. 1. We developed program that could analyze complex nonlinear of plane truss. 2. In view of the results analyzied the numerical analysis example of plane truss, When Howe truss, Fink truss, Pratt truss, and Warren truss are equal to weight and span, and the same load is loaded. Among the trusses of same weight, Warren truss is the most useful in efficiency. And When height of warren truss is changed, the lower height of truss, the more useful in efficiency

초·중·고 학생들의 과학 태도 변화에 대한 학습환경의 원인 분석

권치순,허명,양일호,김영신 한국과학교육학회 2004 한국과학교육학회지 Vol.24 No.6

최근 학교교육에서 학생들의 과학 태도에 대한 관심과 중요성이 증대되고 있다. 학생들의 과학 태도는 학업 성취도, 교육 프로그램의 일관성, 수업의 질뿐만 아니라 과학 교육의 관점과 과학 관련 직업 선택에도 영향을 준다. 그 동안의 과학 태도에 대한 선행 연구와 국제 비교 연구에 의하면, 우리나라 학생들의 과학 태도는 점차 하락하고 있는 것으로 나타났다. 이 연구에서는 초ㆍ중ㆍ고 학생들의 과학 태도 변화 과정을 알아보고, 이에 영향을 미치는 학습 환경 변인을 밝히는데 그 목적이 있다. 초등학교 3학년부터 고등학교 2학년 학생 약 6,925명을 대상으로 2003년 3월부터 3회에 걸쳐 학생들의 과학 태도와 학습 환경 검사를 실시하였다. 분석 결과, 학생들의 과학 태도는 일년 중 6월 이후에 낮아지고, 초등학교 4학년에서 중학교 2학년까지 과학 태도가 크게 변하였다. 과학 태도가 1학기보다는 2학기에 더 많이 하락하였으며, 초?중학교 학생들보다 고등학생들의 과학 태도 하락 폭이 더 컸다. 학생들의 과학 태도에 가장 큰 영향을 주는 요인은 과학에 대한 경험이고, 교사, 학급 분위기 등이 과학 태도 변화에 영향을 주는 것으로 나타났다. 학습 환경 변인은 과학 태도가 하락한 학생과 과학 태도가 상승한 학생이 각각 다르게 영향을 주는 것으로 밝혀졌다. 과학 태도에 영향을 주는 범주는 초등학교에서는 성, 학년, 지역, 중학교에서는 학년과 지역, 그리고 고등학교에서는 지역으로 나타났다. The importance of science attitudes is more increasing in science education. Science attitudes may influence students' attainment, consistency and quality of classwork as well as their later views of science education and scientific occupations. According to the international comparative researches and longitudinal studies on Korean students' science attitudes, it has shown that the more grade, the less science attitude. This research was survey the science attitudes and learning environment variables, and then make a inquiry that causes of decline of science attitudes. To study this purpose, the participating students in this study will be selected from 3th to 11th grade. 6,925 participants were administered 3 times in questionnaires of science attitudes and learning environment variables during a year. The result of this study showed that science attitude got low after June. Science attitude was changed from 4th grade to 8th grade students. Science attitude much more decrease second semester than first semester, high school students' science attitude fell much. It was experience about science that cause the biggest effect in science attitude and other learning environment variables influence in science attitude change. Learning environment variables made different influence from students of increased and declined science attitude. As category that influence in science attitude, in elementary school were gender, area and grade, in middle school were grade and area, and in high school was area.

불소화계면활성제 함유 DPPC/Cholesterol 및 DPPG/Cholesterol 베지클의 BSA(bovine serum albumin)친화성 연구

권경옥,김명자,김현영 숙명여자대학교 자연과학연구소 1998 자연과학논문집 Vol.- No.9

본 연구에서는 항원(antigen). 항체(antibody) 등을 삽입시켜 자극반응성 베지클을 제조의 예비실험으로 대표적인 생체 단백질 BSA(bovine serum albumin)와 베지클의 친화도에 관해 알아보았다. DPPC(dipalmitoylphosphatidylcholine)/Chol, DPPG(dipalmitoylphos-Phatidylglycerol)/Chol,DPPC/Chol/FFS(ammonium pentadeca-fluorooctyrate)/FS(sodium bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate), DPPG/Chol/ FFS/FS의 4종의 베지클을 제조하고, 제조된 4종의 베지클에 대해 column chromatography 법에 의해 BSA와의 흡착 여부를 확인했다. 실험 결과, 각 계의 베지클 입자크기는 BSA의 흡착으로 인해 감소하는 것으로 나타났고, 감소하는 정도는 DPPC/Chol와 DPPG/Chol에서 큰 것으로 나타났다. 반면, 제조된 계의 제타전위(ξ-Potential)값에는 거의 변화가 없었다. BSA와의 결합친화력의 비교에서는 DPPC/Chol. DPPG/Chol. DPPC/Chol/FFS/FS. DPPG/Chol/FFS/FS 순으로 낮아진다는 결과를 얻었다. 이들 실험결과에 바탕하여, 위의 4종의 베지클과 BSA와의 결합친화력에 대해 베지클의 표면전하와 베지클 막의 밀집성(compactness)이 영향을 미친다는 결론을 얻었다. The purpose of this study is to prepare a functional vesicle for the possible use as a biosensor. In this work, we have performed a preliminary experiment for biosensor, Four different systems of vesicle have been prepared with the composition of DPPC(dipalmitoylphosphatidylcholine)/Chol, DPPG (dipalmitoylphos-phatidylglycerol)/Chol, DPPC/Chol/FFS(ammonium pentadecafluoro-octyrate)/FS(sodium bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate) and DPPG/Chol/FFS/FS. By use of column chromatography, it was found that BSA has been adsorbed onto the vesicle structure. The size of vesicle was found to decrease as adsorption occurs between the two species and the extent was greater in the systems of DPPC/Chol and DPPG/Chol. However, the δ-potential of the system remained essentially unchanged. The affinity of vesicle to BSA was found to decrease in the order of DPPC/Chol, DPPG/Chol, DPPC/Chol/FFS/FS and DPPG/Chol/FFS/FS. Based on these findings, it may be concluded that the affinity of vesicles onto BSA was affected by the surface charge and the compactness of vesicle.

ABS 동작 Mechanism에 대한 고찰

권영웅,안영명 瑞逸大學 1998 論文集 Vol.16 No.-

위암발증 원인에 대한 생활습관 및 영양섭취에 있어서 농촌지역 주민 조사 : 강원도 화천군 주민의 Helicobacter pylori 감염률을 중심으로 Infection of Helicobacter pylori in Whachon Area, Kang-Won Do

권태봉,이정선,우영국,이명헌,정철원,주진순 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.1

위암발증의 원인을 밝히기 위하여 설문조사를 통하여 강원도 화천군에 거주하는 주민들의 일반사항, 생활습관 및 영양섭취실태와, ELISA법으로 Helicobacter pylori 감염률을 조사하였다. 조사 대상자는 40∼69세까지의 지역주민 169명으로 남자 79명, 여자 90명이었으며 그 결과는 다음과 같다. 조사 대상자의 학력은 65.7%가 초등학교 이하였으며, 월수입은 60%가 50만원 이하였다. 대상자의 62.7%가 농업에 종사하였고 자녀수는 64.3%가 3∼5명이었으며 대상자의 34.5%가 흡연을 하고 있었고 68.4%가 음주를 한다고 대답하였다. 대상자의 전체 평균신장은 156.7㎝로 여자는 150.1㎝, 남자는 164.4㎝ 이었다. 평균체중은 61.1㎏으로 여자의 체중은 57㎏, 남자는 65.7㎏이었으며 BMI는 전체 평균 25.5%로 여자는 24.8%, 남자는 20.1%이었다. Helicobacter pylori의 감염률은 전체 조사대상자의 66.3%이었으며, 여자의 67.7%, 남자의 64.6%가 감염되었고 연령별로는 40대의 70%, 50대의 62.2%, 60대의 69.4%가 각각 감염된 것으로 나타났다. 일상 생활 요인에 따른 Helicobacter pylori의 감염률은 흡연의 정도가 심하고 학력이 낮으며 월수입이 낮을수록 높은 경향을 보였다. Helicobacter pylori의 감염여부에 따라 감염자와 비감염자의 영양섭취량을 조사해 본 결과 비감염자는 감염자와 비교해서 에너지, 총단백질, 동물성 단백질, 칼슘, 비타민 C 섭취량이 높은 경향을 보였으며 철분과 niacin의 섭취량은 낮은 경향을 보였다. To examine the relationship between the casual infection of gastric cancer and lifestyle and nutritional status, we surveyed 169 persons, 90 females and 79 males, aged 40∼69 years from June 7 to June 14, 1997, in Whachon area, Kang-Won Do, Korea. For this purpose, we investigated Helicobacter pylori infection and identified the effect of sex, age, smoking, alcohol consumption, economic status, occupation, life-style and food intake on Helicobacter pylori infection. Helicobacter pylori status was evaluated using an enzyme-linked immunosorbant assay(ELISA) for anti-Helicobacter pylori immunoglobulin G(IgG). Helicobacter pylori infection was present in 66.3% of total subjects, namely, 67.7% of female and 64.6% of male and its prevalence increased with smoking, low education level and low monthly income. Energy, total protein, calcium and vitamin C intakes in the negative Helicobacter pylori infection group were higher than those in positive Helicobacter pylori infection group. However iron and niacin intakes were lower in the Helicobacter pylori negative group than in the positive group.

골프클럽 헤드의 제조 및 소재

석명진,김영도,권영순 한국주조공학회 2003 한국주조공학회지 Vol.23 No.3

후막 전계발광소자(Electroluminescence)의 제조와 발광특성

정영호,김병권,박조용,명광식,Khatkar, S.P.,Liang, Yujun,한상도 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

부액와 유방 조직

고명권,김영근 한국의학사 1993 診斷과治療 Vol.13 No.6

흉통의 양상에 따라 분류한 불안정형 협심증 환자의 임상적 소견의 비교

김명수,김성구,정호석,온영근,신원용,김철현,최태명,현민수,권영주 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Background and aims : The clinical syndrome unstable angina pectoris that encompasses a variety of symptoms and clincal presentations of transient episode of myocardial ischemia, was devided to several subgroups. Also, it has variable pathophysiologic factors to cause myocardial ischemia. According to clincal presentation, coronary angiographic finding and prognostic factor, the result of unstable angina pectoris is variable. In fact, there were a few data reported on the prognosis of wide spectrum of patients with unstable angina. However, the precise risk of subgroups according to classitication has not been established because it was difficult to compare between studies. We classified unstable angina pectoris by clinical nature of chest pain, and performed to establish and compare the clinical presentations, coronary angiographic findings, treatement and prognosis of patients with unstable angina within subgroups of classification. Methods : Retrospenctive data for 164 unstable angina pectoris patients admitted to the Internal Cardiology Division of Soon Chun Hyang University Hospital from May 1996 to July 1999 was analyzed. The patients were classified into one of the following categories: Class I, new onset of severe angina; Class II, acceleration of previous chronic stable angina; Class III, angina at rest. Clinical presentations, echocardiographic findings, coronary angiographic findings, treatment and prognosis were compared. Results : From the total 164 patients, the subjects of classes were as follows : Class I, 46 cases (28.1%); Class II, 74 cases (45.1%); Class III, 44 cases (26.8%). In view of age distribution, the 7th decade had the highest incidence, and then, 6th, 8th decades were followed. There was no baseline differences among the 3 classes with respect to gender, number of risk factors. Significantly, class II showed more severe findings in abnormal Q wave 15 cases (20.8%), total occclusive lesion 10 cases (20.8%) and three vessel coronary disease 11 cases (22.9%) than other classes. The change of ST segment was significantly apparent (p<0.02) among class I 28 cases (60.8%), class III 26 cases (59.0%), comparing with class II 30 cases (40.5%). Class III had the higher incidence of one vessel coronary artery disease than class I and III. The heparin treatment was performed in 99 cases (60.1%). The incidence of nonfatal myocardial infarction was much more in class I and III, each 4 cases (8.7%, 9.8%) than in class II 1 cases (1.4%). In-Hospital death was occurred in class I and II, each 1 case. Conclusion : The patients with the acclerated angina from chronic stable angina had more severe coronary artery disease than other classes, but they had better in-hospital prognosis.