• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.52-53
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• 2014

계통이 차단되었음에도 태양광 발전 시스템이 발전을 지속하는 상황을 단독운전이라 하는데, 이런 단독운전은 배전 설비의 손상, 선로 유지 및 보수자의 감전사고 우려가 있으므로 이를 신속히 인지하여 시스템을 정지시켜야 한다. 본 논문에서는 최악의 상황에서도 단독운전 현상을 신속히 검출하여 시스템을 정지시킬 수 있도록 주파수 변동을 통한 단독운전 검출 기법에 대하여 새롭게 제안하고, 이를 시뮬레이션과 실험을 통해 단독운전 검출 성능 및 정상 상태 시 PCS 출력 전력의 품질에 대하여 분석하도록 한다.

• Korean Journal of Culture and Social Issue
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• v.20 no.4
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• pp.281-305
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• 2014

This study investigated the relationship between older driver's safe driving behavior, driving mobility(amount of driving, assessment for driving-related physical ability, confidence for adaptation in driving situation, amount of social activity) and subjective well-being(life satisfaction, positive/negative affect). The data of these variables were collected by questionnaire method based on face-to-face interview. The results can be summarized as followings. First, the older driver who reported higher scores in the self-report safe driving behavior questionnaire tended to show higher level of subjective well-being and driving-based mobility. Second, all the sub-factors in the driving-based mobility questionnaire were positively related to life satisfaction, positive affect but negatively related to negative affect except amount of driving. Finally, it was found that both confidence for adaptation in driving situation and amount of social activity positively mediated the relationship between self-report safe driving behavior and life satisfaction and positive affect, but confidence for adaptation in driving situation negatively mediated the relationship between self-report safe driving behavior and negative affect, Implication and suggestion were discussed.

• Science of Emotion and Sensibility
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• v.7 no.3
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• pp.27-35
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• 2004

This study has investigated a psychological status of optimal and pleasant driving condition by measuring various physiological signals using SCR(skin conductance response), PPG(peripheral plethysmograph), SKT(skin temperature) and HR(heart rate). The physiological response was measured during various simulated driving conditions. We developed a hardware and algorithm to measure and analyze the physiological response. The physiological signals has reflected the level of driver's tension or relaxation as well as the heart rate. The emotional responses of drivers were also measured and analyzed in this experiment. The result of the study can be used to design a system to enhance the driver's emotional satisfaction as well as to monitor the driver's safety and health condition.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.9 s.351
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• pp.142-148
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• 2006

Considering the domestic traffic environment and the increase of traffic accidents, we have been asked to exactly analyze the main causes of accidents for the accident-experienced drivers to be rehabilitated. In this thesis we present the development process and results of a driving simulator using the IPDE method in the interest of safe driving and driving rehabilitation. Through this Driving simulation development the rehabilitated driver has the possibility of experiencing the real driving situation with the driving aptitude and examines the reasons of accidents. Through the examinations the driver has the chance to correct the deformities of driving by choosing the explanatory scenes, and through this process the driver is able to develop the capability to react in the real situation. However this driving simulation system is one of the best developed, depending on weather and road condition the braking distance may change. Therefore the fuzzy rule and neural network have been used in this thesis to solve previously mentioned problem. The simulation exactly calculated the road and weather conditions to adjust the breaking intensity.

• Science of Emotion and Sensibility
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• v.23 no.2
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• pp.103-120
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• 2020

Using driving simulation, this study investigated the effects of driver's trust in the adaptive cruise control (ACC) system and road density on driver's workload and situation awareness. The drivers were allocated into one of four experimental conditions manipulated by ACC system trust level (trust-increased vs. trust-decreased) and road congestion (high vs. low). The workload and situational awareness of the participants were measured as dependent variables. The results showed followings. First, trust-decreased group for the ACC system had significantly lower trust scores for the system in all of the measurement items, including reducing the driving load and securing safe driving due to the use of this system, than the trust-increased group. Second, the trust-decreased group showed a slower reaction time in the secondary tasks and higher subjective workload than trust-increased group. Third, in contrast, the situational awareness for the driving situation was significantly higher in the trust-decreased group than trust-increased group. The results of this study showed that the driver's trust in the ACC system can affect the various information processing performed while driving. Also, these results suggest that trust in the user's system should be considered as an important variable in the design of an automated driving assistance system.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.10a
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• pp.129-134
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• 1995

본 연구에서는 경보에 관한 지식을 획득하는 방법으로 경보간의 논리적 물리적 상관관계를 평가하여 지식구조를 설정하는 방법을 사용하고 있다. 이 지식구조를 지식기반으로 추론하여 주어진 상황에서 필요 없는 경보를 제거하거나 억제하며, 표시된 경보에 대해서도 운전원 조치의 긴급성을 운전상황에 따라 평가하여 우선순위를 동적으로 표시하는 지식기반 다이나믹 경보처리기술을 개발한다. 이를 위해 경보 운전절차서에 나타난 개별 경보들 중에서 주요계통경보들을 운전모드별로 분류하고, 연동신호에 의한 경보와 물리적인 원인-결과의 연동관계의 경보로 평가, 분석하여, 설정된 경보처리기술의 적용가능성을 평가하기 위해 가상 시나리오를 개발하고, 예비 prototype을 구현하였다.

• Journal of the Korea Society of Computer and Information
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• v.15 no.9
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• pp.165-172
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• 2010

Communication problems have been regarded as one of the biggest causes in trouble in many industries. This led to extensive research on communication as a part of human error analysis. The results of existing researches have revealed that maintaining a good quality of communication is essential to secure the safety of a large and complex process system. In this paper, we suggested a method to measure the quality of communication during off-normal situation in main control room of nuclear power plants. It evaluates the cosine similarity that is a measure of sentence similarity between two operators by finding the cosine of the angle between them. To check the applicability of the method to evaluate communication quality, we compared the result of communication quality analysis with the result of operation performance that was performed by operators under simulated environment.

• Korean Journal of Culture and Social Issue
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• v.12 no.4
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• pp.37-53
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• 2006

This study examined the perception of driving ability of drivers under stressful situation and it attempted to collect the base data in an effort to prevent the traffic accidents by the women drivers. For this purpose, 180 drivers residing in the Seoul and Gyeonggi region were selected to find out how they perceive their driving ability and driving ability of the others, and in particular, study was focused on in what kind of situation female drivers felt most stress out. Looking in relation to the driving ability, female drivers tend to assess overly high on driving ability of male drivers while making excessively low on the abilities of other female drivers. Looking into the stress of female drivers while driving, the female drivers experience more stress during driving compared to the male drivers. This type of result indicates that the women lack the confidence on driving abilities while experiencing severe stress on the driving performance.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.10a
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• pp.92-97
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• 2003

원전에서 운전절차서는 운전수행시 해당 운전원에게 요구되는 세부적인 작업내용이 명시되어 있다 특히, 비상운전절차서는 비상상황에서 운전원의 주관적 판단을 최대한 배제하고 안전해석에 의해 안전성이 검증된 작업만이 수행되도록 더욱 철저하게 안전성 중심으로 준비되어 있다. 이러한 운전절차서에 있어서 가장 중요한 요소는 발전소의 안전성을 유지할 수 있는 안전해석 결과를 정확히 준수하는 것이다.(중략)

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.723-726
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• 1996

본 연구에서는 액체금속로의 핵심구조인 소디움루프를 위한 운전지원 전문가시스템을 개발한다. 소디움루프는 현재 원자력연구소에서 연구 개발 단계에 있으며, 안전 운전을 위한 운전 지식을 연구하고 있는 중이다. 본 논문에서는 이러한 연구 상황에 맞추어 개발되는 전문가시스템에게 요구되는 특징을 정리하고, 소디움루프 운전의 효과적 지원과 운전원의 편의에 중점을 둔 전문가시스템의 개발을 설명한다.