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복부수술 전 젖소초유의 경구투여가 내독소혈증과 TNF-α에 미치는 영향
서현일(Hyun Il Seo),전우규(Woo Kyu Jeon),강진호(Jin Ho Kang),임시영(Si Young Lim),이승세(Seung Sei Lee),손병호(Byung Ho Sohn),류창학(Chang Hak Ryu),신준호(Jun Ho Shin),김흥대(Hung Dai Kim),한원곤(Won Kon Han),오태윤(Tae Yun Oh),우희연(H 대한외과학회 2006 Annals of Surgical Treatment and Research(ASRT) Vol.70 No.6
수소버스 전복 안전기준 도입에 따른 통계적 인명가치 및 비용편익효과 연구
임서현,장정아,홍성진,Lim, Seo Hyun,Jang, Jeong Ah,Hong, Sung Jin 한국자동차안전학회 2021 자동차안전학회지 Vol.13 No.3
This study is a study to estimate the VSL (Value of a Statistical Life) and CBA (Cost-benefit analysis) of the rollover safety standard for hydrogen buses, VSL is an economic value concept used to quantify the benefits of avoiding death. CBA shows the effect of cost-benefit, and if B/C is greater than 1, there is a social effect. In order to estimate the VSL and CBA, the hydrogen bus introduction scenario was assumed to be optimistic (20,000 vehicles in 2030), neutral (15,000 vehicles in 2030), and pessimistic (10,000 vehicles in 2030), and the effect of reducing human casualties was estimated. As a result, except for the pessimistic market situation of introducing hydrogen buses (10,000 vehicles in 2030) and the VSL reduction ratio of 10%, all policies were judged to have high cost-benefit effects. These results indicate that the introduction of the rollover safety standard for hydrogen buses is a socially effective policy.
임서현,민경란,이종실,장동표,김인영,Lim, Seohyun,Min, Kyeongran,Lee, Jongshill,Jang, Dongpyo,Kim, Inyoung 대한의용생체공학회 2014 의공학회지 Vol.35 No.3
We propose an individual identification method using a single-lead electrocardiogram signal. In this paper, lead I ECG is measured from subjects in various physical and psychological states. We performed a noise reduction for lead I signal as a preprocessing stage and this signal is used to acquire the representative beat waveform for individuals by utilizing the ensemble average. From the P-QRS-T waves, features are extracted to identify individuals, 19 using the duration and amplitude information, and 16 from the QRS complex acquired by applying Pan-Tompkins algorithm to the ensemble averaged waveform. To analyze the effect of each feature and to improve efficiency while maintaining the performance, Relief-F algorithm is used to select features from the 35 features extracted. Some or all of these 35 features were used in the support vector machine (SVM) learning and tests. The classification accuracy using the entire feature set was 98.34%. Experimental results show that it is possible to identify a person by features extracted from limb lead I signal only.
교육용 3D 영상 콘텐츠를 활용한 프로그램이 유아발달 및 창의성에 미치는 영향
임인정(Lim In Jung),서현아(Seo Hyun Ah),허수윤(Heo Su Yun) 한국창의력교육학회 2013 창의력교육연구 Vol.13 No.3
유아들의 눈에 쉽게 인식되고 몰입될 수 있는 자료를 구현하기 위해 교육용 3D 영상 콘텐츠를 교수매체에 적용함으로써 유아발달과 창의성에 어떠한 영향을 미치는지 알아보고자 부산광역시 K군에 소재한 J어린이집 만5세 유아 17명과 C어린이집 만5세 유아 17명을 대상으로 J어린이집 유아 17명은 교육용 3D영상 콘텐츠를 활용한 수업을 9주간 주 2회 총 17회를 실시하였고, C어린이집 17명은 통제집단으로 만5세 누리과정에 준하는 활동을 하였다. 본 연구 결과 교육용 3D영상 콘텐츠를 활용한 수업은 유아발달 검사에서 사회발달을 제외한 모든 요인에서 집단 간 통계적으로 유의미한 차이가 나타났으며 유아 창의성에서 추상성을 제외한 모든 요인에서 유의미한 차이가 나타났으므로 유아의 창의성을 향상시키는데 효과적임을 알 수 있었다. 향후 교육용 3D영상 콘텐츠의 바람직한 활용이 무엇보다도 중요함과 동시에 교육의 내용 및 활용이 효과적으로 제공되는 수업매체로서의 적용할 수 있음을 시사한다. This study aims to investigate about influence on Child development and Children's Creativity Through education programs method to 3D Stereoscopic Contents, which now ever more considered a form of effective method for teaching then education programs method to 2D Stereoscopic Contents. The conclusions of this study on the basis of our research processes are as follows. First, the experiment group which conducted by education programs method to 3D Stereoscopic Contents showed a meaningful difference of Child development by comparison with that of the control group. It means education programs method to 3D Stereoscopic Contents had positive impact on promoting Child development. Second, the experiment group which conducted by education programs method to 3D Stereoscopic Contents showed a meaningful difference of Children's Creativity by comparison with that of the control group. It means education programs method to 3D Stereoscopic. Contents had positive impact on promoting Children's Creativity.
수요응답교통서비스가 이용자의 활동성에 미치는 효과: 지역 간 차이 실증분석
김원철(KIM, Wonchul),임서현(LIM, Seo Hyun),홍성효(HONG, Sung Hyo) 대한교통학회 2022 대한교통학회지 Vol.40 No.3
본 논문은 국토교통부의 도시형 교통모델 시범사업(공공형 택시) 자료를 이용해 교통모델 사업의 농촌지역 교통서비스 개선 효과를 회귀분석을 통해 실증적으로 분석한다. 도시형 교통모델 시범사업을 통한 외출횟수와 방문지의 수는 지역 간 상이한 변화를 보이며, 이중차분을 통한 분석의 결과는 시지역에 비해 군지역에서 시범사업을 통한 외출횟수와 방문지의 수 증가가 통계적으로 유의하게 큼을 제시한다. 특히, 군지역에서 사업시행으로 인한 외출횟수와 방문지 수의 증가가 시지역에 비해 각각 0.52회와 0.39곳만큼 큰 것으로 나타났다. 이러한 분석결과는 대부분의 선행연구들이 사업시행 지역에 한정하여 분석함으로써 경기변동에 의한 변화를 통제하지 못하는 한계를 극복한다. 교통약자의 교통편의 증진을 위한 정책은 형평성 측면에서 그 당위성이 제시되었으나 본 논문의 실증분석결과는 (예산의) 효율성 측면에서도 이러한 정책의 타당성이 확보될 수 있음을 함축한다. This paper empirically analyzes the effect of improving transportation services in rural areas of the transportation model project through regression analysis using the data of the urban transportation model pilot project (public taxi) of the Ministry of Land, Infrastructure and Transport. The number of going out and the number of places visited through the urban transport model pilot project show different changes between regions. The result of the analysis through double difference suggests that the increase in the number of going out and the number of places visited through the pilot project is statistically significantly greater in the rural area than in the urban area. In particular, it is analyzed that through the project the number of going out and the number of places visited have become greater in rural areas than those in urban areas by 0.52 times and 0.39 places, respectively. These results overcome the limit of most previous studies where the changes caused by cyclical fluctuation are not controlled for since their analyses are restricted to the areas with the project. The policy for the promotion of transportation for the transportation disadvantaged was justified in terms of equity, but the results of the empirical analysis of this paper imply that the validity of these policies can be secured in terms of efficiency (budget) as well.