Modified Bagging Predictors를 이용한 SOHO 부도 예측

김승혁,김종우 한국지능정보시스템학회 2007 지능정보연구 Vol.13 No.2

In this study, a SOHO (Small Office Home Office) bankruptcy prediction model is proposed using Modified Bagging Predictors which is modification of traditional Bagging Predictors. There have been several studies on bankruptcy prediction for large and middle size companies. However, little studies have been done for SOHOs. In commercial banks, loan approval processes for SOHOs are usually less structured than those for large and middle size companies, and largely depend on partial information such as credit scores. In this study, we use a real SOHO loan approval data set of a Korean bank. First, decision tree induction techniques and artificial neural networks are applied to the data set, and the results are not satisfactory. Bagging Predictors which has been not previously applied for bankruptcy prediction and Modified Bagging Predictors which is proposed in this paper are applied to the data set. The experimental results show that Modified Bagging Predictors provides better performance than decision tree inductions techniques, artificial neural networks, and Bagging Predictors. 본 연구에서는 기존 Bagging Predictors에 수정을 가한 Modified Bagging Predictors를 이용하여 SOHO에 대한 부도예측 모델을 제시한다. 대기업 및 중소기업에 대한 기업부도예측 모델에 대한 많은 선행 연구가 있어왔지만 SOHO만의 기업부도 예측 모델에 관한 연구는 미비한 상태이다. 금융기관들의 대출 심사 시 대기업 및 중소기업과는 달리 SOHO에 대한 대출심사는 아직은 체계화 되지 못한 채 신용정보점수 등의 단편적인 요소를 사용하고 있는 것이 현실이고 이에 따라 잘못된 대출로 인한 금융기관의 부실화를 초래할 위험성이 크다. 본 연구에서는 실제 국내은행의 SOHO 대출 데이터 집합이 사용되었다. 먼저, 기업부도 예측 모델에서 우수하다고 연구되어진 인공신경망과 의사결정나무 추론 기법을 적용하여 보았지만 만족할 만한 성과를 이끌어내지 못하여, 기존 기업부도 예측 모델 연구에서 적용이 미비하였던 Bagging Predictors와 이를 개선한 Modified Bagging Predictors를 제시하고 이를 적용하여 보았다. 연구결과, SOHO 부도 예측에 있어서 본 연구에서 제시한 Modified Bagging Predictors가 인공신경망과 Bagging Predictors 등의 기존 기법에 비해서 성과가 향상됨을 알 수 있었다.

Heteromat-Framed, Superlithiated Metal-Organic Coordination Electrodes for High Performance of Organic-Based Lithium-Ion Battery

김승혁,김주명,정이수,이상영 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.1

Evaluation of nutritional status using bioelectrical impedance analysis in patients with inflammatory bowel disease

김승혁,김유선,이시형,Hyun Mi Lee,Won Eui Yoon,김서현,명희준,문정섭 대한장연구학회 2022 Intestinal Research Vol.20 No.3

Background/Aims: Nutritional status influences quality of life among patients with inflammatory bowel disease (IBD), although there is no clear method to evaluate nutritional status in this setting. Therefore, this study examined whether bioelectrical impedance analysis (BIA) could be used to evaluate the nutritional status of patients with IBD. Methods: We retrospectively analyzed data from 139 Korean patients with IBD who were treated between November 2018 and November 2019. Patients were categorized as having active or inactive IBD based on the Harvey-Bradshaw index (a score of ≥5 indicates active Crohn’s disease) and the partial Mayo scoring index (a score of ≥2 indicates active ulcerative colitis). BIA results and serum nutritional markers were analyzed according to disease activity. Results: The mean patient age was 45.11±17.71 years. The study included 47 patients with ulcerative colitis and 92 patients with Crohn’s disease. Relative to the group with active disease (n=72), the group with inactive disease (n=67) had significantly higher values for hemoglobin (<i>P</i><0.001), total protein (<i>P</i><0.001), and albumin (<i>P</i><0.001). Furthermore, the group with inactive disease had higher BIA values for body moisture (<i>P</i>=0.047), muscle mass (<i>P</i>=0.046), skeletal muscle mass (<i>P</i>=0.042), body mass index (<i>P</i>=0.027), and mineral content (<i>P</i>=0.034). Moreover, the serum nutritional markers were positively correlated with the BIA results. Conclusions: Nutritional markers evaluated using BIA were correlated with serum nutritional markers and inversely correlated with disease activity. Therefore, we suggest that BIA may be a useful tool that can help existing nutritional tests monitor the nutritional status of IBD patients.

지구온난화에 따른 이상기후의 변화

김승혁,유민우,이선재,석형근,유태영,강수임 한국환경교육학회 2019 한국환경교육학회 학술대회 자료집 Vol.2019 No.12

禮美地域의 地質

金勝爀 三陟大學校 1996 論文集 Vol.29 No.1

The area surveyed consists of the Hwajeol formation, Dongjeom quartzite, Dumugol formation, Maggol limestone, Jigusan shale, Duwibong limestone, and Manhang formation. Some of these formations are intruded by the basic dykes and covered with Diluvium and Alluvium. The Goseong limestone, which overlies which Goseong Shale, in turn, may be correlated to the Duwibong limestone. The Yemi limestone breccia, which has beem dated to be of unknown age and interpreted to cover the Jeongsun limestone unconformably, is revealed to be the intraformational breccla intercalaled in the upper part of the Maggol limestone. The Jeongsun limestone is also correlated, and the proposed unconformaty between the Jeongsun limestone and the Yemi limestone breccia is not detected. Quartzite bed in the Jeungson limestone is also intercalated in the Maggol limestone. The Hongjum Series, which has been mapped in the northern part of the surveyed area is revealed to be a pink limestone bed which is correlated to the upper part of the Duwibong limestone. Thrusts and normal faults with persistant continuity are correlated to exist, but the smaller faults, which have been mapped between the former, are not recognised.

고내열 PLA 시트 가공응용제품에 대한 연구 (Study on High Heat-Resistance PLA sheet processed products)

김승혁,이열,강종원,이현섭 한국고분자학회 2015 한국고분자학회 학술대회 연구논문 초록집 Vol.2015 No.10

三陟炭田 北部의 地質

嚴濟鉉,朴東基,金勝爀 三陟大學校 産業科學技術硏究所 1999 産業科學技術硏究論文集 Vol.4 No.-

The Jeungsan-Sabuk area(northern part of Samchok Coalfield) in the area of northern limb of Baekunsan syncline, comprises Precambrian schist complex, Cambro-Ordovician Formation(Chosun Supergroup), Carbo-Permian Formation(Pyongyang Supergroup) and Cretacious intrusive rocks. Chosun Supergroup is divided into nine formations, that is, Jangsan quartizite formation, Myobong formation, Pungchon limestone formation, Hwajeol formation, Dongjeom quartizite formation, Dumugol formation, Maggol limestone formation, Jigunsan shale formation and Duwibong limestone formation in ascending order. Pyongyang Supergroup is subdivided into five formations, namely, Manhang formation, Geumcheon formation, Jangseong formation, Hambaeksan formation and Dosagok formation from older to younger. Deposition of the Chosun Supergroup, begininng with Jangsan quartizite formation, started on the steadily subsiding stable shelf. This continued subsidence of the shelf was accompanied by some intermittent oscillation. The sedimentary basin turned into a miogeosyncline, gradually depositing th Myobong formation, Pungchon limestone formation and the peculiar limestone of thythmic pattern(Hwajeol formation), in ascending order. On the other hand, the land part was lowered to a peneplain with the subsidence of sea floor. At the beggining of Ordovician, the carbonate deposition was temporarily brought to a halt by the emerged Dongjeom sea floor where fine sands were deposited to form Dongjeom quartizite formation. The Dongjeom foor, again, became a miogeosynclinal environment which persisted until the end of middle Ordovician. Paleozoic rocks in the area are affected by E-W and NE-SE trending folding, and then followed by N-S trending faulting and thrusting. Precambrian basement crops out at the hinge zone of the Mureungdam anticline. E-W trending Baekunsan and Mureungdam folds are affected by later NE-SW trending folds. N-S trending faults are characterised by dextral sense of strike slip fault and drag folds are developed along the eastern part of the faults. Geological structures related with thrust movements are hinterland dipping duplex along the contact boundaty between the Myobong and Pungchon Formation, antiformal stacks in the eastern part of the Mureung and Pungchon formations, antiformal stacks in the eastern part of the Mureung fault and back thrusts.

南韓의 重石鑛床에 對하여

金勝爀 三陟大學校 1996 論文集 Vol.29 No.1

Generally, the tungsten deposit is classified into four types in Korea as follows. 1) scheelite bearing skarn deposit 2) net work scheelite deposit 3) scheelite pegmatite deposit 4) tungsten molybdenum quartz vein deposit Scheelite bearing skarn deposit occurs in the fissure and bedding plane, which is dervied from hypothermal metasomatic replacement. The hypothermal metasomatism is associated with the gypothermal solution of the partially consolidated magma. Net work scheelile deposit is closely related to net work quartz vein in the highly sillicious igneous breccia and the scheelite and wolframite is imprignated in the net work quartz vein. scheelite pegmatile deposi is connection with plagioclase pegmatite. Scheelite occurs in the plagioclase pegmatite deposit. Tungsten molybdenum quartz vein deposit means the quartz vein contains wolframte. scheelite, moly bdenite and other sulfide mineral. In this paper, Korean tungten deposit is classified into vein type, dissemination type and stock work type.

친환경 자동차 내장재용 PP/PLA Alloy 개발

김승혁,남병욱,홍채환,이현섭,신동명,안승대 한국공업화학회 2010 한국공업화학회 연구논문 초록집 Vol.2010 No.1

미세먼지와 호흡기질환의 상관관계

김승혁,이선재,박지용,유민우,장범진,박준석,홍경준,장준,윤수혁 한국환경교육학회 2018 한국환경교육학회 학술대회 자료집 Vol.2018 No.12