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로지스틱회귀모형을 이용한 위험물수송차량 교통사고확률 분석 연구
김강현,문정훈,홍정열 한국위험물학회 2022 한국위험물학회지 Vol.10 No.1
Hazardous materials transport vehicle crashes on highways occur steadily with an average of 30 cases per year, and leakage of Hazardous materials due to traffic accident causes enormous socioeconomic losses. Studies related to truck safety have been conducted for a long time in Korea, but studies on traffic accidents and influencing factors of hazardous materials transport vehicles have not received attention from researchers. Therefore, this study aims to predict the cause of hazardous materials transport vehicle accidents on highways and the probability of accidents. For this purpose, the highway crash dataset from 2007 to 2020 provided to the Korea Expressway Corporation was collected, and we extracted hazardous materials transport vehicle accidents from the dataset. The logistic regression model was applied for predicting crash probability by selecting four types of crashes, such as fatal and injury, human factor, night-time, and ramp section. As a result of this study, fatal and injury crashes of hazardous materials transport vehicles were derived the most from driver's fatigue and ramp sections, and human factor crashes mainly occurred in short straight sections with horizontal alignment less than 500m straight. Crashes during nighttime were most likely to occur at rest areas, and accidents in ramp sections increased the probability of crashes in geometric features with sharp curves radii less than 500m and or huge curves over 1,000m. It is expected that safety prevention will be possible by selecting the severity of accidents and risk exposure sections by applying advanced methodologies, establishing hazardous materials transport management, and improving vulnerable expressways.
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김강현,김규태 한국전기전자재료학회 2004 전기전자재료 Vol.17 No.6
1948년 J. Bardeen 등에 의해 발명된 게르마늄 트랜지스터 이래로 반도체 공업은 숨 가쁘게 발전하여 현재는 $0.1\mu\textrm{m}$ 수준의 크기를 지나 $0.01\mu\textrm{m}$ 수준의 트랜지스터까지도 시연되고 있다[1,2]. 집적회로의 발전에는 대면적의 식각기술의 뒷받침과 끝임 없는 소재의 개발이 그 밑바탕이 되고 있어 앞으로의 발전에 있어서도 패턴닝 기술과 소재 기술은 다음 세대에도 반도체 산업발전의 원동력이 될 것임을 짐작해 볼 수 있다. (중략)
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김강현,신문수,조기홍,김한규,조경기 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.4
Over a 5-year period the authers had treated conservatively 40 cases of the acute epidural hematomas, in which 33 lesions were in the supratentorial area and others in the infratentorial area. The configuration of the hematomas was mostly focal and most of them did not show mass effect in aspect of midline shift. But there were 2 cases with over 10㎜ of midline shift which were located at the frontoparietal and temporoparietal area. The hematomas at the parietal area and posterior fossa did not make the midline shift. 36 patients among 40 patients with the epidural hematomas were succussfully treated in the nonoperative management. The clinical findings of these patients were over 13 points of Glasgow coma scale, no focal neurological defictis and normal vital signs. And CT scan of these patients revealed less 10㎜ of midline shifting, less 40㏄ amount of hematoma, hematomas located in all area except temporal fossa and hematoma without associated intradural lesions. Four patients failed in conservative treatment underwent evacuation of the hematoma. Relative poor mentation on admission(G.C.S.≥13), large volume of hematoma, expansile volume course and associated intradural lesions were considered as failure factors.
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김강현 大田工業大學 1988 한밭대학교 논문집 Vol.5 No.1
Distributed simulation is the execution of a model on a network of tightly or loosely coupled processes. Study of distributed simulation has been motivated by the increasing demands for real time applications, the study of very complex systems and the availability of very fast and accurate VLSI components. Given the back ground information on distributed simulation designs, this paper presents a taxonomy of distributed simulation and discusses distributed simulation methodology.
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김강현 국회입법조사처 2020 입법과 정책 Vol.12 No.3
This study analyzed the effects of labor-management cooperation on wage gap by size of companies by utilizing workers' wage data and WEF(World Economic Forum) labor-management cooperation index by size of companies in OECD countries. The results of panel regression analysis of this study showed that the effect of labor-management cooperation on wages was different by company size. The estimated results showed that the labor-management cooperation index, which is an interest variable, was significant in companies with 250 or less.,When the size of the company is divided by the number of workers, the wage gap decreases 0.44% when the labor-management cooperation index increases by 1%, and the wage gap decreases 0.37% when the labor-management cooperation index increases by 1%.,The results of this study show that Korea has the capacity to mitigate the wage gap when labor-managementcooperation increases compared to OECD countries, which shows that the relationship between labor-management cooperation and wage gap is statistically established. 본 연구는 OECD 각국의 기업 규모별 근로자 임금데이터와 WEF(세계경제포럼) 노사협력지수를 활용하여 기업규모별로 노사협력이 임금격차에 미치는 영향을 분석하였다. 패널 회귀분석을 통해 분석한 결과 노사협력이 임금에 미치는 효과는 기업규모별로 상이하게 나타났다. 근로자수 기준으로 기업규모를 구분하였을 때, 1~9인 기업과 1~49인 기업은 노사협력지수가 1% 증가할 때 임금격차는 0.44% 감소하고, 1~249인 기업은 노사협력지수가 1% 증가할 때 임금격차는 0.37% 감소하는 것으로 나타났다. 또한, 우리나라를 더미변수로 두고 분석한 결과에서 우리나라는 OECD 국가와 비교해서 노사협력 증가시 임금격차를 완화할 수 있는 여력이 있는 것으로 나타나 통계적으로 노사협력과 임금격차와의 관계가 성립함을 알 수 있었다. 이에 노사협력 문화 구축을 통해 노사갈등을 줄이고, 협력을 통해 임금 불평등을 해결하는 노력이 필요하다.
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아프리카 빈곤국가의 에너지 선택결정요인: 탄자니아 리아뭉구(Lyamungu) 농촌지역을 중심으로
김강현,김흥주,주영규 연세대학교(미래캠퍼스) 빈곤문제국제개발연구원 2016 地域發展硏究 Vol.25 No.특별호
Biomass energy utilization of Tanzania region leads to soil erosion, degradation of forests. after all, It is to give an adverse effect on the productivity of the crop and local residents health. The purpose of this study is to empirically analyze the factors affecting energy use patterns. and Through these results, this study is to provide a policy implications for mitigating the negative aspects in the use of traditional energy. Result of analysis, A convergent model was utilized, not the traditional model of the ladder, in order to analyze this study through a theoretical review. In the case of poor areas, it has been found that in selecting the energy shows a convergent form. In particular, the poverty level and assets of households in the economic factors have a significant impact on the choice of energy. and also Householder education and gender in social factors have been led to significant results. These results, based on this study, are to suggest policy implications for poverty and energy policy in poor countries.
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