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전태연,도규영,정종현,권용실,김석범 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.5
목 적 : 혈청 콜레스테롤 농도와 자살 등의 공격행동간의 연관성에 관한 여러 연구가 있었으나 일치된 결과를 보이고 있지 못하다. 이에 저자들은 다양한 진단의 정신과 입원 환자들 중 공격행동을 보인 환자의 콜레스테롤 농도를 정상 한국 성인에서의 혈청 총 콜레스테롤의 성별, 연령별 평균 및 표준편차와 percentile분포에 맞추어 공격행동 및 자살시도와 혈청 콜레스테롤 농도간의 연관성을 알아보기 위하여 본 연구를 시행하였다. 방 법 : 본 연구는 1994년 1월 1일부터 1995년 6월 31일까지 18개월간 카톨릭대학교 의정부성모병원 정신과 병동에 입원하였던 환자 중 콜레스테롤 농도를 얻을 수 있었던 127명을 대상으로 하였다. 대상 환자는 공격행동의 유무에 따라 공격군과 비공격군으로 분류하여 공격군 35명과 비공격군 92명의 자료를 얻었으며, 공격군은 Overt Aggression Scale을 사용하여 평가하였다. 측정된 각 환자의 콜레스테롤 농도는 정상 한국 성인에서의 혈청 총 콜레스테롤의 성별, 연령별 평균 및 표준편차와 percentile분포에 맞추어 4개의 군으로 나눈 후 공격행동 발생비율, 자살시도간의 차이를 알아보았다. 또한 공격행동을 보인 군에서도 각 콜레스테롤군 간의 총 공격 점수를 비교하였다. 결 과 : 1) 각 콜레스테롤군 간의 공격행동 발생비율에는 유의한 차이가 없었다. 2) 공격군에서 각 콜레스테롤군 간의 총 공격 점수는 유의한 차이를 보이지 않았다. 3) 각 콜레스테롤군 간의 자살시도 빈도는 유의한 차이가 없었다. 결 론 : 정신과 입원 환자의 혈청 콜레스테롤 농도를 정상 한국 성인에서의 혈청 총 콜레스테롤의 성별, 연령별 평균 및 표준편차와 percentile분포에 맞추었을 때 혈청 콜레스테롤 농도와 공격행동 및 자살시도에 유의한 연관이 없었다. Objectives : An association between serum cholesterol concentration and violent behavior has been suggested, but has not been consistently demonstrated. This study was conducted in order to evaluate the relation between serum cholesterol concentration and violent behavior in psychiatric inpatients who had been admitted at Uijongbu St. Mary's Hospital, the Catholic University of Korea from January 1994 to June 1995. Methods : We divided the 127 subjects into violent(35 subjects) and non-violent group(95 subjects). According to the percentile distribution of serum total cholesterol in healthy Korean adults, the subjects were classified into four subgroups : Group 1, subjects Whose cholesterol concentrations were below 26% of percentile distribution, Group 2, from 26% to 50%, Group 3, 51% to 75% and Group 4, above 75%. In the four cholesterol subgroups, the authors examined the incidence of violent behaviors and suicidal attempts. Within the violent group, total aggression score of four cholesterol subgroups was compared. Results : 1) Among the four cholesterol subgroups, there were no significant differences in the violent behavior. 2) Within the violent groups, total violent score of the four cholesterol subgroups showed no significant difference. 3) Among the four cholesterol subgroups, there were no significant differences in suicidal attempt. Conclusion : When the serum cholesterol concentrations of psychiatric inpatient applied to the percentile distribution of serum total cholesterol in healthy Korean adult, no association was found between serum cholesterol concentration and violent behavior and suicide attempt.
김동훈,김정란,장태정,권삼,임현술 東國大學校醫學硏究所 1997 東國醫學 Vol.4 No.-
코크스 오븐 가스(coke oven gas, COG)는 제철공장에서 흔히 취급하는 물질로 200여 성분을 함유하고 있다. 그 중 인체에 심각한 급성 중독을 초래할 수 있는 물질로는 일산화탄소, 청산 및 황화수소이다. 본 증례는 코크스 오븐 가스를 탈류 세정하는 작업장에서 보호구를 착용하지 않은 채 탈류 세정탑의 찌꺼기를 제거하던 중 이에 잔존하는 유해성 가스에 중독 되어 사망한 경우로, 황화수소가 가장 유력한 원인 성분으로 간주되었다. 본 증례의 경우로 보아 첫째, 코크스 오븐 가스를 처리하는 곳에서 황화수소 등의 각종 유해 물질의 폭로에 대하여 충분한 대책이 이루어져야 하고, 둘째, 부검시 혈액은 항응고제가 투여된 용기에 채취되어야 하며 냉장 보관되는 상태로 운송되어 가급적 빠른 시간 내에 검사되어야 한다고 생각한다. Coke oven gas is a main gas managed in steel plants, which contains 200 composites. Carbon monoxide, hydrocyanide, and hydrogen sulfide of them are serious gas incurring acute intoxication in human. Steel plants have considered of adverse effects of carbon monoxide and hydrocyanide, but because occupational exposure of hydrogen sulfide is uncommon, the measure against hydrogen sulfide is not enough. This case is that a male worker, during removing sludge packed in a tower purifying coke oven gas without a protective mask, expired from acute intoxication of remained toxication of remained toxic gas and that hydrogen sulfide intoxication is probably the cause of death. According to this case, it is thought that first, a complete measure for exposure of hydrogen sulfide is necessary in the plants managing coke oven gas, and second, the blood should be sampled with an anti-coagulinated container, delivered in the cool condition, and analyzed immediately.
Koo, Hyun Jung,Yang, Dong Hyun,Kim, Young-Hak,Kang, Joon-Won,Kang, Soo-Jin,Kweon, Jihoon,Kim, Hyun Jung,Lim, Tae-Hwan Springer-Verlag 2016 The international journal of cardiovascular imagin Vol.32 No.1
<P>The detection of hemodynamically significant stenosis is important because ischemia-guided revascularization improves overall patient outcomes. Fractional flow reserve (FFR), which is measured during invasive coronary angiography, is regarded as the gold standard for determining hemodynamically significant coronary stenosis. Although coronary computed tomography angiography (CCTA) has been widely used to exclude significant coronary artery disease in patients with low to intermediate pretest probability, anatomic assessment by CCTA using diameter stenosis >= 50 % does not correlate well with the functional assessment of FFR. To overcome the weaknesses of conventional CCTA, such as its low specificity and positive predictive value, especially in patients with a small-diameter artery, poor image quality, or high calcium score, more sophisticated CCTA analysis methods have been developed to detect hemodynamically significant coronary stenosis. Studies that use the quantification of coronary plaque, transluminal attenuation gradient (TAG), CT myocardial perfusion (CTP), and CT-derived FFR have been conducted to validate their diagnostic performances, though each method has its pros and cons. This review provides details on the quantification of coronary plaque, TAG, CTP, and CT-derived FFR, including a definition of each, how to gather and interpret data, and the strengths and limitations of each. Further, we provide an overview of recent clinical studies.</P>
( Hyun Seok ),( Sang Woon Lee ),( Seong Gon Kim ),( Dong Hyun Seo ),( Han Sung Kim ),( Hae Yong Kweon ),( You Young Jo ),( Tae Yeon Kang ),( Myung Jin Lee ),( Weon Sik Chae ) 한국잠사학회 2013 International Journal of Industrial Entomology Vol.27 No.1
The objective of this study was to evaluate the bone regeneration capability of silk membrane plus 3% 4-hexylresorcinol (3% 4-HR plus SM) in a rabbit calvarial defect model. Twenty New Zealand white rabbits were used in this study. Bilateral round shaped defects were created in the parietal bone (diameter: 8.0 mm). And the defects were covered with (1) 3% 4-HR plus SM, (2) collagen membrane (CM), (3) no graft material. After surgery, the animals were sacrificed at 4 weeks and 8 weeks. Bone regeneration was analyzed in each section by micro-computerized tomography (μ-CT). And Hematoxylin and eosin stains were used for histological analysis. As measured by μ-CT analysis 4 weeks after surgery, the average of new bone formation in animals treated with 3% 4-HR plus SM was greater than that of animals treated with CM. and the difference was statistically significant. And well organized lamella bones were observed in the histological view of the 3% 4-HR plus SM group. Therefore, more bone regeneration was seen in animals treated with 3% 4-HR plus SM than in those treated with CM or uncovered control.
Partial Sum Minimization of Singular Values in Robust PCA: Algorithm and Applications
Tae-Hyun Oh,Yu-Wing Tai,Bazin, Jean-Charles,Hyeongwoo Kim,In So Kweon IEEE 2016 IEEE transactions on pattern analysis and machine Vol.38 No.4
<P>Robust Principal Component Analysis (RPCA) via rank minimization is a powerful tool for recovering underlying low-rank structure of clean data corrupted with sparse noise/outliers. In many low-level vision problems, not only it is known that the underlying structure of clean data is low-rank, but the exact rank of clean data is also known. Yet, when applying conventional rank minimization for those problems, the objective function is formulated in a way that does not fully utilize a priori target rank information about the problems. This observation motivates us to investigate whether there is a better alternative solution when using rank minimization. In this paper, instead of minimizing the nuclear norm, we propose to minimize the partial sum of singular values, which implicitly encourages the target rank constraint. Our experimental analyses show that, when the number of samples is deficient, our approach leads to a higher success rate than conventional rank minimization, while the solutions obtained by the two approaches are almost identical when the number of samples is more than sufficient. We apply our approach to various low-level vision problems, e.g., high dynamic range imaging, motion edge detection, photometric stereo, image alignment and recovery, and show that our results outperform those obtained by the conventional nuclear norm rank minimization method.</P>
Low Temperature Sintering and Microwave Dielectric Properties of B2O3-added LiAlSiO4 Ceramics
Kweon, Sang-Hyo,Joung, Mi-Ri,Kim, Jin-Seong,Kim, Bo-Yun,Nahm, Sahn,Paik, Jong-Hoo,Kim, Young-Sik,Sung, Tae-Hyun Wiley Blackwell (Blackwell Publishing) 2011 JOURNAL OF THE AMERICAN CERAMIC SOCIETY - Vol.94 No.7
Robust High Dynamic Range Imaging by Rank Minimization
Tae-Hyun Oh,Joon-Young Lee,Yu-Wing Tai,In So Kweon IEEE 2015 IEEE transactions on pattern analysis and machine Vol.37 No.6
<P>This paper introduces a new high dynamic range (HDR) imaging algorithm which utilizes rank minimization. Assuming a camera responses linearly to scene radiance, the input low dynamic range (LDR) images captured with different exposure time exhibit a linear dependency and form a rank-1 matrix when stacking intensity of each corresponding pixel together. In practice, misalignments caused by camera motion, presences of moving objects, saturations and image noise break the rank-1 structure of the LDR images. To address these problems, we present a rank minimization algorithm which simultaneously aligns LDR images and detects outliers for robust HDR generation. We evaluate the performances of our algorithm systematically using synthetic examples and qualitatively compare our results with results from the state-of-the-art HDR algorithms using challenging real world examples.</P>