Tomohiro Yamamura - Academia.edu (original) (raw)
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Papers by Tomohiro Yamamura
2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
The purpose of this research is to contribute to social communication between humans and robots i... more The purpose of this research is to contribute to social communication between humans and robots in scenes that have been considered difficult due to the limited facial expression capabilities of robots. In order to provide more detailed facial expressions, we designed a novel wire-driven 3D eyebrow using a soft material with a bending structure. We then demonstrated the mechanical properties of the eyebrow design and developed a prototype that could be implemented on the humanoid robot iCub to verify its operation. Lastly, we confirmed that the new design enables the production of more slight changes in facial expressions by allowing the eyebrows to change their shape at more delicate angles and continuity than the LED eyebrows of the conventional iCub.
Review of automotive engineering, 2010
Alarm timing for a forward collision warning system plays an important role in system effectivene... more Alarm timing for a forward collision warning system plays an important role in system effectiveness. It is necessary to determine the appropriate alarm timing by considering a driver’s response to not only true alarms but also how drivers respond when an alarm should have been issued but was not (missed alarms) to evaluate both the increased system effectiveness and decreased over-reliance on the system. By using a driving simulator, two different alarm timings were compared to investigate the braking behaviour toward alarms and the driver’s response to missed alarms according to two different alarm timings: (1) adaptive alarm timing, in which an alarm is given based on the ordinary braking behaviour of the individual; and (2) non-adaptive alarm timing, in which an alarm is given by using a particular alarm trigger logic (e.g., Stopping Distance Algorithm) as a common timing for all drivers. As a result, the timing of non-adaptive alarms was earlier than that of adaptive alarms in t...
For the design of a vehicle control algorithm to monitor and correct longitudinal driving behavio... more For the design of a vehicle control algorithm to monitor and correct longitudinal driving behaviour, it is essential to have a good insight into the different parameters that determine this behaviour. In this research, eleven systems and control related parameters are identified, which are related to time headway (THW), time-to-collision inverse (TTCi), and the switch time between accelerator release and brake activation. These parameters are used to determine and distinguish between dissimilar types of longitudinal driving behaviour, in terms of driving and driver characteristics. The efficient K-means clustering algorithm is used for the classification of longitudinal driving behaviour. Driver behaviour experiments were carried out that involved forty-five participants. The results of the study show that four main determinants of longitudinal driving behaviour can be distinguished using measurable parameters, with the indicated opposite extreme values: prudence (aggressive vs. pru...
The Proceedings of the Transportation and Logistics Conference, 2008
The Proceedings of The Computational Mechanics Conference, 2008
Sice Annual Conference 2011, 2011
The objective of this research was to clarify effects of driver visual distraction on alarm effec... more The objective of this research was to clarify effects of driver visual distraction on alarm effectiveness and necessity for FCWS by comparing results obtained in two driving simulator studies. Results show that the presence of alarms induced decreases in collision risk when drivers were distracted. Contrary alarms could not lead to a decrease of risk when drivers were not distracted although alarms were given with the same timing. Moreover, subjective ratings of unnecessary alarms varied according to whether driver distraction occurred.
SAE International Journal of Passenger Cars - Electronic and Electrical Systems, 2009
Abstract; The drivers' risk feeling approaching to the lead car was quantified by magnitude e... more Abstract; The drivers' risk feeling approaching to the lead car was quantified by magnitude estimation method, using a driving simulator. As a result, both of Time Headway (THW) and Time To Contact (TTC) were used to estimate drivers' risk feelings. In steady-state ...
Human Modelling in Assisted Transportation, 2011
ABSTRACT
The Journal of the Acoustical Society of America, 1993
In a vehicle vibration damping force control system, rolling, pitching and bouncing motions are d... more In a vehicle vibration damping force control system, rolling, pitching and bouncing motions are detected independently in a predetermined priority order; each detected motion is compared with respective predetermined levels; if each detected motion exceeds each predetermined level, hydraulic switch valves are controlled so that operating fluid energized by stroke changes of the hydraulic cylinders due to the detected vibration motion is passed through damping force generating mechanisms to increase a damping force against only the detected vibration motion, without generating any other damping forces against other non-detected vibration motions. Since only the necessary damping force is generated against only the detected vibration motion, the damping force is minimized to maintain vehicle riding comfort.
2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
The purpose of this research is to contribute to social communication between humans and robots i... more The purpose of this research is to contribute to social communication between humans and robots in scenes that have been considered difficult due to the limited facial expression capabilities of robots. In order to provide more detailed facial expressions, we designed a novel wire-driven 3D eyebrow using a soft material with a bending structure. We then demonstrated the mechanical properties of the eyebrow design and developed a prototype that could be implemented on the humanoid robot iCub to verify its operation. Lastly, we confirmed that the new design enables the production of more slight changes in facial expressions by allowing the eyebrows to change their shape at more delicate angles and continuity than the LED eyebrows of the conventional iCub.
Review of automotive engineering, 2010
Alarm timing for a forward collision warning system plays an important role in system effectivene... more Alarm timing for a forward collision warning system plays an important role in system effectiveness. It is necessary to determine the appropriate alarm timing by considering a driver’s response to not only true alarms but also how drivers respond when an alarm should have been issued but was not (missed alarms) to evaluate both the increased system effectiveness and decreased over-reliance on the system. By using a driving simulator, two different alarm timings were compared to investigate the braking behaviour toward alarms and the driver’s response to missed alarms according to two different alarm timings: (1) adaptive alarm timing, in which an alarm is given based on the ordinary braking behaviour of the individual; and (2) non-adaptive alarm timing, in which an alarm is given by using a particular alarm trigger logic (e.g., Stopping Distance Algorithm) as a common timing for all drivers. As a result, the timing of non-adaptive alarms was earlier than that of adaptive alarms in t...
For the design of a vehicle control algorithm to monitor and correct longitudinal driving behavio... more For the design of a vehicle control algorithm to monitor and correct longitudinal driving behaviour, it is essential to have a good insight into the different parameters that determine this behaviour. In this research, eleven systems and control related parameters are identified, which are related to time headway (THW), time-to-collision inverse (TTCi), and the switch time between accelerator release and brake activation. These parameters are used to determine and distinguish between dissimilar types of longitudinal driving behaviour, in terms of driving and driver characteristics. The efficient K-means clustering algorithm is used for the classification of longitudinal driving behaviour. Driver behaviour experiments were carried out that involved forty-five participants. The results of the study show that four main determinants of longitudinal driving behaviour can be distinguished using measurable parameters, with the indicated opposite extreme values: prudence (aggressive vs. pru...
The Proceedings of the Transportation and Logistics Conference, 2008
The Proceedings of The Computational Mechanics Conference, 2008
Sice Annual Conference 2011, 2011
The objective of this research was to clarify effects of driver visual distraction on alarm effec... more The objective of this research was to clarify effects of driver visual distraction on alarm effectiveness and necessity for FCWS by comparing results obtained in two driving simulator studies. Results show that the presence of alarms induced decreases in collision risk when drivers were distracted. Contrary alarms could not lead to a decrease of risk when drivers were not distracted although alarms were given with the same timing. Moreover, subjective ratings of unnecessary alarms varied according to whether driver distraction occurred.
SAE International Journal of Passenger Cars - Electronic and Electrical Systems, 2009
Abstract; The drivers' risk feeling approaching to the lead car was quantified by magnitude e... more Abstract; The drivers' risk feeling approaching to the lead car was quantified by magnitude estimation method, using a driving simulator. As a result, both of Time Headway (THW) and Time To Contact (TTC) were used to estimate drivers' risk feelings. In steady-state ...
Human Modelling in Assisted Transportation, 2011
ABSTRACT
The Journal of the Acoustical Society of America, 1993
In a vehicle vibration damping force control system, rolling, pitching and bouncing motions are d... more In a vehicle vibration damping force control system, rolling, pitching and bouncing motions are detected independently in a predetermined priority order; each detected motion is compared with respective predetermined levels; if each detected motion exceeds each predetermined level, hydraulic switch valves are controlled so that operating fluid energized by stroke changes of the hydraulic cylinders due to the detected vibration motion is passed through damping force generating mechanisms to increase a damping force against only the detected vibration motion, without generating any other damping forces against other non-detected vibration motions. Since only the necessary damping force is generated against only the detected vibration motion, the damping force is minimized to maintain vehicle riding comfort.