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이수형,송경의,이형영,하형욱 大韓神經精神醫學會 1984 신경정신의학 Vol.23 No.4
정신분열증 환자의 지각결핍을 타 질환군과 비교해 보기 위하여 1983.6.1부터 동년 8월 31일 까지 전남의 대병원 정신과 외래에 다니는 우울증 환자 20명 국립나주정신병원에 입원한 정신분열증 환자 20명을 임의 선택하여 Garner의 모형을 이용 카드 분류를 시행하고 그 자료를 토대로 수정분류시간, 공제지수, 비율지수 등을 산출하여 변량분석한 결과 다음과 같은 결론을 얻었다. 1. 양 군의 수정시간을 변량 분석한 결과 유의한 차이를 발견할 수 없었다. 2. 공제지수와 비율지수를 변량분석한 결과 과다성 분류와 여과분류에서는 공제지수와 비율지수에서 아무런 유의차가 없었다. 3. 주사분류에서는 공제지수 비교에서 1% 수준에서 비율지수 비교에서 5% 수준으로 우울증의 분류시간이 긴 것으로 나타났다. 이상의 결과를 살펴볼 때 여과기능의 결함이라는 지각결핍은 정신분열증의 고유한 장애가 아닐 수도 있겠다. The perception of stimuli with two dimensions (size and figure) was investigated using Garners card sorting method into schizophrenic and depressive patients. The comparison of three performance indices (redundancy, filltering, scanning) between two study groups revealed that 1) the analysis of variance of the corrected time shows no significant difference between two groups, 2) in redundancy and filtering sorting the subtractive and ratio indices show no significant difference between two groups, 3) in scanning sorting the depressive group shows significantly longer sorting time than schizophrenic group(p<0.01 in subtractive index, p>0.05 in ratio index). The above findings suggest that the previously known perceptual deficit(mainly filtering deficit) may not be specific only to schizophrenia.
2000-2008년 수도권 지역의 가와사끼병의 역학적 연구
박형준,김영대,김우경,송영환,김동욱,박용원 인제대학교 2009 仁濟醫學 Vol.30 No.-
Objectives : The aim of this study was to investigate the clinical features and epidemiologic pattern of Kawasaki disease(KD) in Seoul metropolitan area for the 9-year-period. Methods : An epidemiologic survey on KD was retrospectively performed. The questionnaire was sent to 3 hospitals including Seoul Paik hospital, Sanggye Paik hospital and Ilsan Paik hospital, and obtained data were analyzed. Results : Data from a total of 1,297 cases were collected. The male-to-female ratio was 1.33:1(741:556), and the mean age of onset was 32.2 months. The monthly number of patients was slightly higher in May, June and December. There was no sibling case and rate of recurrence cases was 2.31%(30/1,297), and the proportion of patients with KD among total hospitalized pediatric patients was 2.05%. Coronary arterialu..A) abnormalities were detected at follow-up by echocardiogram in 17.2%(204/1,185) of cases including 0.76% of aneurysms. Conclusion : Comparing with the data of the KD patients in Korea(1.48%), our data of 1,297 KD patients area showed higher proportion of patients with KD among total hospitalized pediatric patient(2.05%).
금속-반도체-금속 광검출기 내부 이종접합 경계면에서의 캐리어 포획에 의한 검출 효율 감소에 관한 모델링
金炯奭,徐鍾旭 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2
암전류를 줄이기 위해서 사용한 wide-bandgap 반도체 덮개층이 금속-반도체-금속 광검출기(MSMPD)의 검출 효율 감소에 미치는 영향을 정량적으로 분석하기 위하여 MSMPD내부 이종접합 경계면에서의 캐리어 포획 현상을 연구하였다. 이종접합 경계면에서의 전위 우물을 infinite Airy well로 가정하고 양자역학적인 면을 고려하여 우물내에서 수치 해석적 반복법을 이용해서 Schrodinger 방정식과 Poisson 방정식의 self-consistent 해를 구하였다. AlGaAs 덮개층에 의해 이종접합 경계면에서 많은 캐리어가 포획됨을 알 수 있었다. 경사층에 대해서는 고려하지 않았는데, 실험 결과에 의하면 경사층을 사용함으로써 이종접합 경계면에서의 캐리어 포획량을 감소시켜서 검출 효율을 증대시킬수 있다.
대퇴-대퇴동맥간 우회로술 후 하지 허혈증상 재발 및 이식편 폐색의 원인
김형기,김영욱,허승,나목찬 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.1
With increasing number of high-risk advanced atherosclerotic patients, crossover femoro-femoral pypass (FFB) became commonly chosen extra-anatomic bypass for symptomatic iliac artery occlusive disease. But the causes FFB graft failure have not been clarified yet. Purpose: We aimed to investigate the natural course of native artery disease, the causes of graft occlusion and recurrent leg ischemia after FFBs. Method: Among 162 primary FFBs for ??atherosclerotic iliac occlusive disease, 45 patients who underwent follow-up arteriography for recurrent ischemic symptom were enrolled. We investigated the interval changes between initial preoperative and follow-up angiograms and categorized then as inflow, outflow and/or graft lesion into stenosis >50% or occlusion. And the patients were divided into 2 groups as patent FFB group and occluded FFB group. We compared interval changes on angiograms between patient and occluded FFB groups to find out any difference and tried to determine the ultimate causes of recurrent leg ischemia considering not only the interval changes but the preexisting, untreated leg arterial lesions. Result: The follow-up angiography was most commonly performed within 1 year after FFV with mean interval of 21.2 ± 21.6 months. Interval changes between 2 angiograms were 24 (53.3%) FFB grafts occlusion, 8 (17.8%) inflow iliac disease progression, and 26 (57.8%) outflow arterial occlusion. Comparing the interval changes between patent and occluded FFB groups, the significantly higher frequency of outflow occlusion was noted in occluded FFB group (75% ??vs 38.1%, P=0.012). The most common finding on follow-up ??angiongram responsible for the recurrent ischemia was also outflowarterial occlusion even in patent FFB group. Conclusion: The most common cause of graft occlusion and recurrent leg ischemia was outflow arterial occlusion after FFB.
천장마감재를 겸한 슬래브 거푸집공법의 효용성 향상 방안
이형수,윤유상,서상욱,김창덕 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
The purpose of this study is to present an improved the construction method of slab form combined with ceiling finish. The current integration construction method has some waste factors ; unnecessary process, rework, time & cost waste. Therefore the study applied the value stream analysis methodology for efficient improvement of current process. The main contents of the study are as follows ; 1) Waste factors of current process were analyzed through current state mapping(CSM). 2) An improved process was suggested through future state mapping(FSM). 3) Cost reduction effect by process improvement was also analyzed. The study recommends that development of technique to eliminate waste factors and application of the construction method of slab form combined with ceiling finish should be increased.
Capacitated Minimum Spanning Tree 문제를 위한 쌍대기반 해법
김형욱,노형봉,지원철 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1
We develop a dual-based procedure for solving the capacitated minimum spanning tree problem (CMSTP). Dual ascent procedure generates a good feasible solution to the dual of the linear programming relaxation of CMSTP. A feasible primal solution to CMSTP can then be constructed based on this solution. The procedure can be used either as a stand-alone heuristic or, else, it can be incorporated into a branch and bound algorithm. A numerical result is given with quite favorable results.