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환승 및 노선우회를 고려한 광역도시철도 경로선택모형 구축
양수정(Sujeong Yang),우연식(Yeonsik Woo),이장호(Jang-Ho Lee) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.05
본 연구는 광역·도시철도 네트워크에서 환승과 노선우회를 고려한 경로선택 모형을 구축하였다. 이용경로의 우회에 따른 영향을 반영하기 위해서 우회비용(angular cost)을 변수로 반영하였으며, 수도권 교통카드 이력자료를 활용하여 이항로짓모형을 구축하였다. 분석결과, 경로선택의 영향요인으로는 통행시간과 환승횟수, 환승통로의 총 환산거리 등이 나타났으며, 우회비용은 통계적 유의성이 높지 않게 나타났다. 모수추정결과로부터 통행시간대비 환승역 총 환산거리와 환승횟수에 대한 한계대체율을 분석하였는데, 실질적인 환승시간 이외에 환승 자체만으로 평균 약 8~13분 정도를 환승저항으로 인지하는 것으로 분석되었다. 이를 통해 광역도시철도 이용자의 경로선택행태를 모사할 수 있을 뿐만 아니라, 최적경로에 대한 정보제공에 활용할 수 있을 것으로 기대된다. The goal of this study is establish a route choice model considering transfer penalty and angular cost in rapid transit networks. In order to take the transfer penalty into account, horizontal distance, the number of stairs, the presence of escalators, and the total scaled distance were used as independent variables. Simultaneously, we also have considered the angular cost to reflect the effect of line alignment. As a result of the analysis, factors affecting the route choice such as the total travel time, the number of transfers, and the total scaled distance of the transfer station were statistically significant. However, the angular cost did not have a significant effect on the route choice. This study allows simulating the route choice behavior in the rapid transit network, it is also expected that the suggested model may be applied to provide information on the optimal route, referring to the marginal rate of substitution among the variables mentioned above.
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피부감작능 평가 대체시험법간 위양성 및 위음성 화학물질에 대한 인체 세포주 활성화방법의 전수에 따른 예측력 평가
조아랑 ( Ahrang Cho ),여경욱 ( Kyenguk Yeo ),정미숙 ( Misook Jung ),이재희 ( Jaehee Lee ),양수정 ( Sujeong Yang ),( Ravi Gautam ),이기용 ( Giyong Lee ),조지훈 ( Jihun Jo ),( Manju Acharya ),( Anju Maharjan ),김창열 ( Changyu 한국동물실험대체법학회 2020 동물실험대체법학회지 Vol.14 No.1
The in vitro alternative assay for evaluating skin sensitizing potentials (SSP) called human Cell Line Activation Test (h-CLAT) has been recently adopted as an international test guideline. The present study was proceeded to pursue the domestic establishment and expansion of h-CLAT. The standard operational procedure was prepared in detail by the lead laboratory (LL) and transferred to one participating laboratory (PL). The LL demonstrated technical proficiency for the 10 substances listed in OECD TG 442E. The PL also demonstrated a certain level of proficiency, in that 4-phenylenediamine and 4-aminobenzoic acid distributed with coded names were correctly classified as positive and negative on SSP, respectively, and other indices including 75% cell viability (CV75) and relative fluorescence intensity (RFI) % for CD54 and CD86 were fell within the reference range. Methyl methacrylate, nickel chloride, and resorcinol, which are inconsistent in predicting SSP through various alternative test methods, were unanimously predicted as negative, positive, and positive on SSP by the two laboratories for the first time through h-CLAT. Both chlorobenzene and sodium lauryl sulfate with the existing h-CLAT report as positive and negative, respectively, were predicted as negative by the PL, which could contribute toward overall categorization into non-skin sensitizer.
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