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UNIFORM ASYMPTOTICS IN THE EMPIRICAL MEAN RESIDUAL LIFE PROCESS
Bae, Jong-Sic,Kim, Sung-Yeun Korean Mathematical Society 2006 대한수학회지 Vol.43 No.2
In [5], Csorgo and Zitikis exposed the strong $uniform-over-[0,\;{\infty}]$ consistency, and weak $uniform-over-[0,\;{\infty}]$ approximation of the empirical mean residual life process by employing weight functions. We carry on the uniform asymptotic behaviors of the empirical mean residual life process over the whole positive half line by representing the process as an integral form. We compare our results with those of Yang [15], Hall and Wellner [8], and Csorgo and Zitikis [5].
When do we need more than local compression to control intraoral haemorrhage?
Jun-Bae Sohn,Ho Lee,Yoon-Sic Han,Da-Un Jung,Hye-Young Sim,Hee-Sun Kim,Sohee Oh 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.6
Objectives: The aims of this study were to determine the effectiveness of local compression in patients presenting to the emergency room with intraoral bleeding and to identify when complex haemostatic measures may be required. Materials and Methods: Five hundred forty patients who had experienced intraoral haemorrhage were retrospectively reviewed. The outcome variable was the haemostasis method used, i.e., simple (local compression with gauze) or complex (an alternative method after local compression has failed). Predictor variables were sex, age, American Society of Anesthesiologists (ASA) class, hepatic cirrhosis, bleeding disorder, use of antithrombotic agents, and site/cause of haemorrhage. Results: The mean patient age was 48.9±23.9 years, 53.5% were male, 42.8% were ASA class II or higher, and 23.7% were taking antithrombotic agents. Local compression was used most often (68.1%), followed by local haemostatic agents, sutures, systemic tranexamic acid or blood products, and electrocautery. The most common site of bleeding was the gingiva (91.7%), and the most common cause was tooth extraction (45.7%). Risk factors for needing a complex haemostasis method were use of antithrombotic agents (odds ratio 2.047, P=0.009) and minor oral surgery (excluding extraction and implant procedures; odds ratio 6.081, P=0.001). Conclusion: A haemostasis method other than local compression may be needed in patients taking antithrombotic agents or having undergone minor oral surgery.
( Jong Sic Kim ),( Se Won Hwang ),( Kwang Hyun Choi ),( Miri Kim ),( Jung Min Bae ),( Hyun Jeong Park ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.2
Background: Inflammatory bowel disease (IBD) is chronic disease of the gastrointestinal tract attributed to aberrant activity of the immune system. Increasing evidence suggests that IBD patients are at an increased risk of inflammatory skin diseases (ISDs). Objectives: We sought to clarify the association between IBD and ISDs using a nationwide health claims database maintained in Korea. Methods: We interrogated Korean health claim database data from 2009 to 2013. We enrolled all patients with IBD, and age- and sex-matched controls, and evaluated the risks of ISDs, including psoriasis, rosacea, and atopic dermatitis, and the risks of autoimmune skin diseases (ASDs), including vitiligo and alopecia areata. We used multivariable logistic regression to this end. Results: ISDs including rosacea, psoriasis, and atopic dermatitis were significantly associated with IBD, whereas the associations between IBD and ASDs including vitiligo and alopecia areata were less marked or non-existent. Ulcerative colitis and Crohn’s disease were both associated with ISDs. Conclusion: IBD was significantly associated with ISDs, but less so or not at all with ASDs.
논문 : 대전지역 중생대 화강암 암반 내 취성파괴 예측연구
장현식 ( Hyun Sic Jang ),최미미 ( Mi Mi Choe ),배대석 ( Dae Seok Bae ),김건영 ( Geon Young Kim ),장보 ( Bo An Jang ) 대한지질공학회 2015 지질공학 Vol.25 No.3
대전지역 중생대 화강암 암반을 대상으로 경험적 해석과 수치해석 모델링을 사용하여 심도에 따른 취성파괴 예측 연구를 수행하였다. 먼저 손상제어시험 등의 실내시험으로 경험적 해석과 수치해석 모델링에 필요한 입력 변수를 측정하였고, 측정결과를 바탕으로 연구지역의 암반을 경암에 속하는 그룹 A와 극경암에 속하는 그룹 B로 구분하여 각 그룹별 대표 물성치를 사용하였다. 취성파괴의 해석에는 해석구간의 심도와 측압계수(k)로 결정되는 원위치응력 값이 필요하나 연구지역의 원위치응력 값은 측정되지 않았다. 그러므로 다양한 원위치응력 상태를 고려하기 위하여 3가지의 측압계수 (k=1,2,3)를 분석에 적용하였다. 경험적 해석과 수치해석 모델링에서 측압계수가 1일 경우, 연구지역의 암반에서는 1000m의 심도까지도 취성파괴가 발생할 가능성이 매우 낮은 것으로 분석되었다. 그러나 측압계수가 2일 경우에는 심도 800 m 구간에서부터, 측압계수가 3일 경우에는 심도 600m 구간에서부터 취성파괴가 발생될 가능성이 높을 것으로 판단된다. 이 연구에서는 점착력약화-마찰각강화(CWFS) 모델과 Mohr-Coulomb 모델이 사용되었으며, CWFS 모델은 암반의 취성 파괴영역의 범위와 깊이를 잘 모사하였으나 모아-쿨롱 모델은 이러한 변화를 구현하지 못하였다. Brittle failure of Mesozoic granite in the Daejeon region is predicted using empirical analysis and numerical modeling techniques. The input parameters selected for these techniques were based on the results of laboratory tests, including damage-controlled tests. Rock masses that were considered to be strong during laboratory testing were assigned to “group A” and those considered to be extremely strong were assigned to “group B”. The properties of each group were then used in the analyses. In-situ stress measurements, or the ratio of horizontal to vertical stress (k), were also necessary for the analyses, but no such measurements have been made in the study area. Therefore, k values of 1, 2, and 3 were assumed. In the case of k=1, empirical analysis and numerical modeling show no indication of brittle failure from the surface to1000 m depth. When k=2, brittle failure of the rock mass occurs at depths below 800 m. For k=3, brittle failure occurs at depths below 600 m. Although both the Cohesion Weakening Friction Strengthening (CWFS) and Mohr-Coulomb models were used to predict brittle failure, only the CWFS model performed well in simulating the range and depth of the brittle failure zone.