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천병렬,김권배,김기식,김영조,김윤년,김창윤,박의현,신동구,심봉섭,이종주,이충원,장성국,전재은,Chun, Byung-Yeol,Kim, Kwon-Bae,Kim, Kee-Sik,Kim, Young-Jo,Kim, Yoon-Nyun,Kim, Chang-Yoon,Park, Wee-Hyun,Shin, Dong-Gu,Shim, Bong-Sub,Lee, Jong-Joo,L 대한예방의학회 1998 Journal of Preventive Medicine and Public Health Vol.31 No.3
To estimate the incidence rate of coronary heart disease in Korea, of all residents in Taegu city aged 25 or above, those who had an acute MI or a fatal coronary event between 1 July 1996 and 30 June 1997 were registered. Seven hundreds and eight patients were registered during the study period(685 were identified at hospital and 23 were autopsy cases). Age-standardized annual incidence rate of men in city area was 93 per 100,000(95% CI; 61-142) and 35% CI; 16-67) in women(100 in men and 20 in women aged 35-64). The incidence was rapidly increased after age 40 in men, however, in women after age 60. Twenty-eight-days case fatality rate was 45% in men and 47% in women. However, in the age group of 45-59 case fatality rate in women was two times higher than that in men. In conclusion, crude annual incidence rate of CHD in city area was 73 per 100,000 in men and 33 in women. The age-standardized annual incidence of CHD in men(93 per 100,000) was 2 times higher than that in women (33 per 100,000) in Korea.
신이철(Yi Chul Synn),김기식(Kee Sik Kim),배장호(Jang Ho Bae),한성욱(Seong Wook Han),박소영(So Young Park),남창욱(Chang Wook Nam),김기영(Ki Young Kim),김윤년(Yoon Nyun Kim),김권배(Kwon Bae Kim),김여희(You Hee Kim) 대한내과학회 2000 대한내과학회지 Vol.58 No.1
N/A Background : Exercise and pharmacologic stress echocardiography are widely used for detecting coronary artery disease. Arbutamine is a new synthetic mild α1-receptor and - receptor agonist developed specifically for stress echocardiography. Arbutamine is superior to dobutamine owing to its enforced chronotropic action than that of dobutamine. We intended to know safety and efficacy of arbutamine stress echocardiography in inducing myocardial ischemia and detecting coronary artery disease. Methods : We underwent arbutamine stress echocardiography on 52 patients, dobutamine stress echocardiography in 35 patients. Alteration of blood pressure, heart rate, regional wall motion on echocardiography were evaluated. Sensitivity and specificity were determined by coronary angiography for 61 patients(Arbutamine: 31, Dobutamine : 30) Results : 1) Hemodynamic alterations respect to stress agents Baseline Maximal Baseline Maximal Interval for Blood pressure Blood pressure Heartrate Heart rate maximal heartrate Arbutamine 122/70mmHg 138/72mmHg 69BPM 137BPM 8.2 min* Dobutamine 126/73mmHg 136/77mmHg 74BPM 102BPM 11.4 min* (* p < 0.05) 2) Comparison of Arbutamine and Dobutamine in sensitivity Sensitivity(Specificity) Side effects Atropine Arbutamine 80.1% (90%) 33(63.5%) 8(15.4%) Dobutamine 78.2% (71.4%) 21(60%) 7(20%) 3) Side effects of stress agents Hypotension Palpitation, tremor Arrhythmia Chest pain Arbutamine 15(28.8%)* 4(7.7%)* 21(40.4%) 8(9.2%) Dobutamine 3(8.6%)* 9(25.7%)* 12(34.3%) 5(5.7%) (* p < 0.05) 4) Premature ventricular contraction was most common arrhythmia in both group. There was no fatal or significant complication, and most complications were subsided after discontinuation of stress agents. Conclusion : Arbutamine is an effective and safe pharmacologic stress agent in detecting myocardial ischemia and superior to dobutamine in increasing heart rate. Sensitivity and specificity of arbutamine were higher than that of dobutamine.(Korean J Med 58:39-47, 2000)
점군 클러스터링 기반 실내 공간의 다중 개체 영역 검출
김기식 ( Ki-sik Kim ),박종승 ( Jong-seung Park ) 한국정보처리학회 2021 한국정보처리학회 학술대회논문집 Vol.28 No.2
본 논문에서는 직육면체 형태의 실내 공간에서 다중 개체 영역을 검출하는 방법을 제안한다. 평면 검출 알고리즘은 평면성을 띄지 않거나 관측이 미흡한 영역에 대해 기하 정보를 검출할 수 없다. 이로 인해 장애물과 같은 개체의 영역을 파악할 수 없는 한계점이 있다. 제안 방법은 유클리드 클러스터링을 기반으로 군집화를 수행하고, 클러스터의 간소화를 통해 다중 개체 영역을 검출한다. 제안 방법은 직육면체 공간의 내부표면을 활용해 직육면체 공간과 좌표계를 공유하는 주요 개체들의 영역을 다량으로 검출한다. 제안 방법은 실험을 통해 다중 개체 영역이 적합하게 검출되었음을 보인다.
실내 환경에서 직육면체 검출을 통한 AR 게임 공간 구성
김기식(Ki-Sik Kim),박종승(Jong-Seung Park) 한국게임학회 2021 한국게임학회 논문지 Vol.21 No.5
본 논문에서는 직육면체 형태의 실내 환경에서 볼륨 검출을 통해 AR 게임 공간을 구성하는 방법을 제안한다. 기존의 공간 인식 방법은 관측 가능한 제한된 공간에 대해서만 평면 검출이 가능하며, 밀도와 노이즈의 변화에 민감하다. 제안 방법은 기존의 평면 검출 방식에서 벗어나 구면 파노라마로부터 OBB를 탐색하는 방법을 통해 AR 게임 공간을 구성한다. 제안 방법은 실험을 통해 기존의 방법보다 수행 속도가 빠르고, 또한 밀도와 노이즈의 변화 등의 환경 제약 요소에 강건함을 보였다. In this paper, we propose a method of constructing AR game spaces through cuboid detection in indoor environment. Conventional spatial recognition methods can detect planes only in limited spaces that can be well observed. They are also vulnerable in density and noise. The proposed method overcomes the limitations of the conventional method by constructing AR game spaces by a method of detecting OBBs from spherical videos. Experimental results showed that the proposed method is faster than the conventional method and it is also robust against environmental constraints such as changes in density and noisy.