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.

문화예술활동과 참여 동기가 개인의 주관적 안녕감에 미치는 영향 - 학습동기의 매개효과를 중심으로 -

김승혁 한국예술경영학회 2019 예술경영연구 Vol.0 No.51

The purpose of this study is to investigate the effects of culture and arts activities (experience, type, frequency) and participation motivation on subjective well-being and to investigate the mediating effects of learning motivation. For this study, the subject is limited to adults who are leading consumers of culture and art activities can decide what activity to do. By survey, data from 1,000 respondents are used for analysis after applying proportional sampling based on the proportion of sex and age indicated in the population statistics. Exploratory factor analysis and reliability analysis were conducted based on the collected data using SPSS v.22.0. The results obtained from the empirical analysis are as follows. First, regarding culture and art activities (experience, type, frequency) and subjective well-being, the results are as follows. H1. Those who experienced culture and arts activities have higher subjective well-being than non-experienced ones. H2. Participating in culture and art activity increases subjective well-being more than just spectating culture and art programs. H3. Heavy participants in culture and art activities have higher subjective well-being than lighter participants. These results indicate that culture and art activities are important variables that have a positive effect on subjective well-being. Therefore, participating in culture and art activities may be an appropriate way to enhance subjective well-being because they are life experiences that individuals can experience in their daily lives. Second, H4. internal motivation and external motivation, sub-factors of participation motivation in culture and art activities, have a positive effect on subjective well-being, and amotivation has a negative effect on subjective well-being. Therefore, in order to improve subjective well-being, it is important to strive to lower amotivation and increase internal and external motivation. Third, H5. learning motivation has a partial mediating effect on the relationship between participation motivation in culture and art activities and subjective well-being. This result suggests that culture and art activities and education might be helpful for subjective well-being when they are conducted together since participation motivation in culture. 본 연구는 문화예술활동(경험, 유형, 빈도)과 참여 동기가 주관적 안녕감에 미치는 영향과 학습동기의 매개효과를 파악하는 데 목적이 있다. 이를 위해 문화예술활동에 대한 주체적인 판단과 주 소비층인 일반 성인들로 한정하고 인구통계를 기준으로 성비와 연령비율에 근거한 비례할당을 적용하였으며, 1,000명의 데이터가 수집·분석에 이용되었다. 수집된 자료는 SPSS v.22.0 통계패키지 프로그램을 통해 탐색적 요인분석과 신뢰도 분석을 시행하였다. 본 연구의 주요결과는 다음과 같다. 첫째, 문화예술활동(경험, 유형, 빈도)과 주관적 안녕감에 대해서는 H1. 문화예술활동 경험자가 비경험자 보다 주관적 안녕감이 높다. H2. 문화예술참여 활동이 문화예술관람 활동보다 주관적 안녕감이 높다. H3. 문화예술활동 헤비참여자가 라이트참여자 보다 주관적 안녕감이 높다. 따라서 문화예술활동은 주관적 안녕감에 긍정적인 영향을 미치는 중요한 변인과 생활경험인 만큼, 주관적 안녕감을 높이는데 적절한 방법이다. 둘째, H4. 문화예술활동 참여 동기의 하위요인인 내적 동기, 외적 동기는 주관적 안녕감에 정(+)의 영향을 미치며, 무동기는 부(-)의 영향을 미치는 것으로 나타났다. 따라서 주관적 안녕감을 높이기 위해서는 무동기를 낮추고 내·외적 동기를 높이기 위해 노력해야 한다. 셋째, H5. 문화예술활동 참여 동기와 주관적 안녕감의 관계에서 학습동기는 부분매개효과가 있는 것으로 나타났다. 그러므로 문화예술활동과 문화예술교육은 함께 진행될 경우 주관적 안녕감의 향상에 도움이 될 수 있음을 시사한다.

지구온난화에 따른 이상기후의 변화

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

미세먼지와 호흡기질환의 상관관계

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

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.

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

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.

친환경 자동차 내장재용 PP/PLA Alloy 개발

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