Jongseong Gwak

Drowsy driving is one of the main causes of traffic accidents. To reduce such accidents, early detection of drowsy driving is needed. In previous studies, it was shown that driver drowsiness affected driving performance, behavioral indices, and physiological indices. The purpose of this study is to investigate the feasibility of classification of the alert states of drivers, particularly the slightly drowsy state, based on hybrid sensing of vehicle-based, behavioral, and physiological indicators

Driver drowsiness is one of the most causes of traffic accidents worldwide. To prevent such accidents, it is necessary to detect driver drowsiness as early as possible. In previous studies, it was confirmed that decreasing arousal levels affect physiological indices, behavioral indices, and driving performance. The goal of this study is to classify the alert states of drivers, particularly the slightly drowsy state, based on physiological indices, behavioral measures, and driving performance. Fi

Thermal factors not only affect the thermal comfort sensation of occupants, but also affect their arousal level, productivity, and health. Therefore, it is necessary to control thermal factors appropriately. In this study, we aim to design a thermal environment that improves both the arousal level and thermal comfort of the occupants. To this end, we investigated the relationships between the physiological indices, subjective evaluation values, and task performance under several conditions of ch

Driving comfort and driving safety are essential factors for drivers. As the environment of vehicle affects the comfort sensation and the arousal level of the drivers, it is necessary to contemplate the way to design of environmental factors inside vehicle. In this study, we focus on the thermal factors inside vehicle, and we aim to design a thermal environment which can improve both the thermal comfort and the arousal level of drivers. In our previous research, we showed that the changes in ind

Indoor thermal quality affects not only a person's perception of comfort, but also their level of arousal, work performance and health. Therefore, it is important that thermal factors are controlled and that a thermal environment is designed in accordance with its purpose. In this study, we aim to design a thermal environment that improves both the arousal level and thermal comfort of the occupants. In order to confirm the possibility that changes in thermal factors can improve both the arousal

Truck platooning is one of the expected systems using automated driving technology based on cooperated adaptive cruise control (CACC) as a solution to problems such as fuel efficiency and lack of driver. To implement the truck platooning system, it is necessary to ensure the safety and acceptability of the system for user and peripheral drivers. In this study, we aim to improve the safety and acceptability of the truck platooning system using a human-machine interface (HMI) to notice the system

Narrow tilting vehicles have been proposed to address transportation issues such as traffic congestion, lack of parking space. The investigation of the effects of narrow tilting vehicles on user is insufficient though many methods for improving the stability of those were proposed. The purpose of the present study is to investigate the effects of tilting mechanism of narrow vehicles on psychophysiological states of driver as a fundamental study. Focused on user satisfaction among the components

Automated driving technology enhanced with automated mobility scooter is expected as a transport support for vulnerable elderly and disabled people. It is necessary to have a mobility strategy that can improve the safety, comfort, and acceptability of users for social implementation of automated mobility scooters. In this study, we specifically focus on the comfort of users. The hypotheses that the velocity of mobility scooters and the density of peripheral pedestrians will affect the comfort of

Indoor temperature affects the arousal level and thermal comfort of drivers. In this study, we aim to prevent the drowsy state and to improve the thermal comfort of drivers in driving for a long time using changes in ambient temperature in cabin. Targeting the scene of driving for 90 minutes, the hypothesis that repeated thermal stimulation to the driver can prevent the decrease of arousal level and thermal comfort of the driver was tested. We investigated the drowsiness level, thermal comfort b

The design of vehicle cabin seats is crucial in transportation, as it directly affects the safety and comfort of both drivers and passengers. To design seat parameters that enhance sitting comfort, a quantitative evaluation of sitting comfort involving an understanding of users’ physiological responses is necessary. This study aimed to assess users’ physiological responses to relaxation induced by changes in seat parameters using electroencephalography and electrocardiography. We examined the ph

Control of thermal factors is needed to improve the conditions of occupants, because the thermal factors affect the conditions of occupants such as the comfort sensation, arousal level which is related to task performance. To determine the control method of thermal factors for improving the comfort sensation and the arousal level, indices which can evaluate the comfort sensation and the arousal level quantitatively and continuously are necessary. In this study, we focused on the physiological in