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홍경용,남철현,최상복,위광복,김기열 韓國保健敎育.健康增進學會 2001 보건교육건강증진학회지 Vol.18 No.3
This study was conducted to examine middle and high school students' knowledge level of first aid, health promotion, and safety. Data were collected from 1.165 students from March 6, 2000 to April 4, 2000. The results of this study are summarized as follows. 1.80.1% of the respondents felt the necessity of first aid. The sources of information about methods of first arid were school (43.9%), mass media (15.6%), and self-study (10.5%). 30.0% of them never leaned the methods of first aid. 2.In the case of obtaining information on first aid through mass media, 58.2% of them got it from TV. 7.3% of them obtained it from magazines, while 5.8% of them got it from newspapers. According to their viewpoints of adequate time to teach the methods of first aid, 38.6% of them thought that the methods had to be taught in the primary school and 25.2% of them thought that they had to be taught in the kindergarten. 24.9% of them replied that the methods had to be taught in the middle school, while 11.3% of them replied that they had to be taught in the high school. 3.The points for knowledge of first aid were 98.29±20.91 on the basis of 150 points (65.5 points on the basis of 100 points). The points showed significant differences in the variables of sex, education level, numbers of siblings, parents' education level, and guardian's occupation.
채승기(Seung-Gi Chai),장대현(Dai-Hyun Jang),이현우(Hyun-Woo Lee),한우철(Woo-Chul Han) 한국컴퓨터정보학회 2011 한국컴퓨터정보학회 학술발표논문집 Vol.19 No.1
사회가 고령화, 초핵가족화 및 재난취약계층이 늘어나면서 요구호자에 대한 고품질 맞춤형서비스가 필요하게 되었고, 급성진환, 심뇌혈관 고위험 환자 및 자살 등 예방가능 사망률이 선진국에 비해 높음에 따라 신속하고 전문적인 구조 구급서비스가 요구된다. 따라서 본 논문에서는 응급환자가 발생하였을 때 병원 도착 전 환자의 정보를 이용하여 응급처치가 가능하도록 하고, 응급의료기관에서는 환자 진료준비를 사전에 할 수 갖출 수 있도록 하여 응급환자 진료의 효율성을 극대화하였다. 또한 사회적 인지도가 높은 119번호를 이용한 다양한 복합 응급신고 접수 시 유관기관과 통합적 대응체계를 구축하는 효율적 응급의료서비스 고도화 전략을 제시하고자 한다.
채승기 ( Seung-gi Chai ),고진호 ( Jin-ho Ko ),황재동 ( Jae-dong Hwang ),김기룡 ( Ki-ryoung Kim ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.2
사회가 고령화, 초핵가족화 및 재난취약계층이 늘어나면서 요구호자에 대한 고품질 맞춤형서비스가 필요하게 되었다. 본 논문에서는 소방방재청의 24*365 긴급대응서비스에 IT첨단기술, 바이오·의료기술을 접목하여 언제 어디서나 고품격 맞춤형 서비스를 제공할 수 있는 U-119시스템 개념, 구축사례 및 발전방향에 대해 제시하고자 한다.
정보 검색 시스템 KRISTAL에서의 효율적인 불리안 질의어 처리에 관한 연구
채승기(Seung-Gi Chai),남영광(Young-Kwang Nam),이준호(Joon-Ho Lee),박현주(Hyun-Joo Park) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.2A
본 논문에서는 UNIX 운영체제하에서 NISO(National Information Standards Organization)에서 정한 불리안 (Boolean) 질의어를 기본으로 하여 개발된 정보 검색 시스템 KRISTAL에서 AND와 OR 명령어, 그리고 단어 사이의 접근정도를 측정하는 Proximity 명령어의 특성을 이용하여 효율적인 불리안 질의어 처리 방법을 구현, 제안한다. 질의 처리 최적화 과정은 첫번째로 대상이 되는 문서를 B+ 나무 구조를 이용하여 구성된 인덱스 화일을 구성한 다음, 사용자가 검색하고자 하는 질의어에 속한 단어를 포함하는 문서의 갯수를 가지는 이진 나무구조를 만들고, AND, W, N, NOT 명령어 수행시 임의의 한 쪽을 만족하는 문서가 존재하지 않을 때 이러한 노드 아래에 존재하는 모든 노드에 대하여 검색을 수행하지 않음으로서 질의 수행 시간을 단축시킨다.
Incidence of gallstones after gastric resection for gastric cancer
Gi Hyeon Seo,Chang-Sup Lim,Young Jun Chai 대한외과학회 2018 Annals of Surgical Treatment and Research(ASRT) Vol.95 No.2
Purpose: Gallstone formation is one of the most common problems after gastrectomy. This retrospective cohort study used the South Korean nationwide claims database to evaluate the incidence and risk factors of gallstone after gastrectomy for gastric cancer. Methods: All consecutive patients who underwent gastrectomy for gastric cancer in South Korea in 2008-2010 were identified. Incidence of gallstone formation 5 years after gastrectomy in males and females, in various age groups, and after different types of gastrectomy was determined. Multivariate logistic regression analysis served to identify gallstone risk factors. Results: Of the 47,752 patients, 2,506 (5.2%) developed gallstone during the 5-year follow-up period. At 12, 24, 36, and 48 months, the cumulative incidences were 1.2%, 2.2%, 3.3%, and 4.3%, respectively. Males had a higher incidence than females (5.8% vs. 4.1%, P < 0.001). Older patients (60-89 years) had a higher incidence than younger patients (30-59 years) (6.1% vs. 4.3%, P < 0.001). Gallstone was most common after total gastrectomy (6.6%), followed by proximal gastrectomy (5.4%), distal gastrectomy (4.8%), and pylorus-preserving distal gastrectomy (4.0%) (P < 0.001). Multivariate analysis showed that male sex (odds ratio [OR], 1.39), an older age (OR, 1.44), and total gastrectomy (OR, 1.40 vs. distal gastrectomy) were significant independent risk factors for postgastrectomy gallstone. Conclusion: The cumulative incidence of gallstone 5 years after gastrectomy for gastric cancer was 5.2%. Male sex, an older age, and total gastrectomy were significant risk factors. More careful monitoring for gallstone may be necessary in patients with such risk factors.
전원기,채영석 嶺南大學校 工業技術硏究所 1991 연구보고 Vol.19 No.1
A combined experimental and numerical approach was used for viscoelastic analysis of polymeric materials. Relaxation tests were conducted at two different temperatures to determine a master curve of the tensile relaxation modulus of epoxy. By assuming the constant Poisson's ratio, Prony series representation of the tensile relaxation modulus was obtained and was used for viscoelastic finite element program. The specimen geometry selected for simulation was an edge-cracked bimaterial strip. Three different rates of bond-normal and bond-tangential displacements were chosen for the loading condition. Near-tip fracture parameters and the reactions along the edges were computed. The results showed very little differences in stress intensity factors and crack opening displacements in comparison with elastic solutions. The reactions, however, changed with time, Which was different from the elasticity.
정원기,채영안 Natural Science Research Institute JEONJU UNIVERSI 1995 전주대학교 자연과학연구소 학술논문집 Vol.8 No.1
Several amorphous SiNx/TbFe thin films were prepared using dc magnetron sputtering system with pure Ar or Ar-O_2 gas mixture. We measured the perpendicular reflectance, Kerr angle, ellipticity of the coated SiNx/TbFe bilayer film at the range of 4000 - 7000Å and calculated the dielectric tensor elements of the TbFe film without SiNx layer using above measured values and ellisometry. Again we calculated the perpendicular reflectance, Kerr angle, ellipticity of the uncoated TbFe film from these dielectric tensor elements. And we calculated the contribution of Tb and Fe sublattice magnetization to the Kerr rotation of TbFe films. The results suggest that the contribution of Tb sublattice magnetization to the Kerr rotation is not negligible in the short wavelength range (4000 - 5000Å).