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차량용 콘솔 스위치 설계를 위한 감성평가 방법에 관한 연구
김성경(Seongkyung Kim),노삼종(Samjong Noh),김정한(Junghan Kim),윤상구(Sangkoo Yun),박노훈(Nohhoon Park) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Many of the functions on the car, and driver"s attention distraction is on the increases. In normal operation devices, the device to manipulate the functions that are one-to-one correspondence. Many features integrated into operations to manipulate the device showing the benefits in terms of input space utilization and integration into a unified system that is the trend. However, the user"s emotions did not considered in this integration process. The emotion manipulation satisfaction are decreasing. The purpose of this study is on the emotional quality that can be degraded in the process of integrating the operation device. Extract through a comparative evaluation on the existing products that can be commonly applied to the user"s emotional sensibilities indicators. Purpose is to study how to select the elements that can improve the emotional quality devices from the integrated operation designed to reflect through the process. In the future present study will be able to contribute to the evaluation of sensibility for produce a integrated operation applied device for depending on the circumstances and the target.
한시령,Cheolsu Shin,Seongkyung Park,Seonyoung Rhyu,Jeongwook Park,김영인 연세대학교의과대학 2009 Yonsei medical journal Vol.50 No.2
Purpose: Lithium-pilocarpine induced status epilepticus (LPSE) causes selective and age-dependent neuronal death, although the mechanism of maturation-related injury has not yet been clarified. The activating transcription factor-2 (ATF-2) protein is essential for the normal development of mammalian brain and is activated by c-Jun N-terminal kinase (JNK). It induces the expression of the c-jun gene and modulates the function of the c-Jun protein, a mediator of neuronal death and survival. Therefore, we investigated the expression of c-Jun and ATF-2 protein in the immature and adult rat hippocampus to understand their roles in LPSE-induced neuronal death. Materials and Methods: Lithium chloride was administrated to P10 and adult rats followed by pilocarpine. Neuronal injury was assessed by silver and cresyl violet staining, performed 72 hours after status epilepticus. For evaluation of the expression of ATF-2 and c-Jun by immunohistochemical method and Western blot, animals were sacrificed at 0, 4, 24, and 72 hours after the initiation of seizure. Results: Neuronal injury and expression of c-Jun were maturation-dependently increased by LPSE, whereas ATF-2 immunoreactivity decreased in the mature brain. Since both c-Jun and ATF-2 are activated by JNK, and targets and competitors in the same signal transduction cascade, we could speculate that ATF-2 may compete with c-Jun for JNK phosphorylation. Conclusion: The results suggested a neuroprotective role of ATF-2 in this maturation-related evolution of neuronal cell death from status epilepticus. Purpose: Lithium-pilocarpine induced status epilepticus (LPSE) causes selective and age-dependent neuronal death, although the mechanism of maturation-related injury has not yet been clarified. The activating transcription factor-2 (ATF-2) protein is essential for the normal development of mammalian brain and is activated by c-Jun N-terminal kinase (JNK). It induces the expression of the c-jun gene and modulates the function of the c-Jun protein, a mediator of neuronal death and survival. Therefore, we investigated the expression of c-Jun and ATF-2 protein in the immature and adult rat hippocampus to understand their roles in LPSE-induced neuronal death. Materials and Methods: Lithium chloride was administrated to P10 and adult rats followed by pilocarpine. Neuronal injury was assessed by silver and cresyl violet staining, performed 72 hours after status epilepticus. For evaluation of the expression of ATF-2 and c-Jun by immunohistochemical method and Western blot, animals were sacrificed at 0, 4, 24, and 72 hours after the initiation of seizure. Results: Neuronal injury and expression of c-Jun were maturation-dependently increased by LPSE, whereas ATF-2 immunoreactivity decreased in the mature brain. Since both c-Jun and ATF-2 are activated by JNK, and targets and competitors in the same signal transduction cascade, we could speculate that ATF-2 may compete with c-Jun for JNK phosphorylation. Conclusion: The results suggested a neuroprotective role of ATF-2 in this maturation-related evolution of neuronal cell death from status epilepticus.
일기 예보를 이용한 기계 학습 기반의 레일 온도 예측 모델 개발
홍성욱(SungUk Hong),이현우(Hyunwoo Lee),박찬(Chan Park),정현석(Hyunsuk Jung),박철정(CheolJeong Park),김형욱,홍성경(SeongKyung Hong),조성진(Seong J Cho) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
In railway safety management, rail-temperature is directly affects the buckling of rails is very important. The previous rail-temperature prediction models have been developed for predicting the rail-temperature, but lack of versatility and performance. In this study, we suggest a novel rai-temperature model based on machine learning with high performance and universally available. We constructed a monitoring station to measure rail-temperature and local weather conditions, and then performed the measurements for 10 months. Using measured data, we found new features that affect rail-temperature. The model was constructed using XGboost, one of the machine learning methods, and the optimal hyperparameter was selected through k-fold cross validation. Our novel rail-temperature model can be used anywhere in the world because rail-temperature can be predicted using only weather forecast data. In particular, the novel rail-temperature prediction model can predict the local rail temperature after 67 hours from the weather forecast of Korea Meteorological Administration. It is expected to help planning railway management plan.