Faculty Profiles - AOKI Hirofumi

Papers - AOKI Hirofumi

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Evaluation of Cognitive Distraction in a Real Vehicle Based on the Reflex Eye Movement

Son Le Anh, Suzuki Tatsuya, Aoki Hirofumi

International Journal of Automotive Engineering Vol. 9 ( 1 ) page： 1 - 8 2018

Language：English Publishing type：Research paper (scientific journal) Publisher：Society of Automotive Engineers of Japan, INC

We have developed a method to estimate driver distraction by mean of involuntary eye movement of the vestibulo-ocular reflex (VOR) and optokinetic response (OKR) by using a driving simulator. This paper presents a practical application of the method to the real vehicle situation. The main concern was whether we can measure the eye movement of VOR and OKR caused by the road surface vibration in the situation. The experiments were conducted with participants sitting on the passenger seat for safety reasons. The results have shown that our method can be applied for evaluating cognitive distraction not only in a driving simulator but also in actual vehicles.

DOI： 10.20485/jsaeijae.9.1_1

Scopus

CiNii Research

Evaluating Driver Mental Workload in a Realistic Condition using Eye Movement Sensor

Son Le Anh, Aoki Hirofumi

Vol. 2018 ( 0 ) 2018

Driving Behavior Improvement through Driving Support and Review Support from Driver Agent

Tanaka Takahiro, Fujikake Kazuhiro, Yoshihara Yuki, Yonekawa Takashi, Inagami Makoto, Aoki Hirofumi, Kanamori Hitoshi

HAI'18: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON HUMAN-AGENT INTERACTION page： 36 - 44 2018

Development of traction force-speed based fuel consumption prediction model for hybrid vehicles

Pitanuwat S., Aoki H., Iizuka S., Morikawa T.

31st International Electric Vehicle Symposium and Exhibition, EVS 2018 and International Electric Vehicle Technology Conference 2018, EVTeC 2018 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：31st International Electric Vehicle Symposium and Exhibition, EVS 2018 and International Electric Vehicle Technology Conference 2018, EVTeC 2018

In the transportation sector, fuel consumption model is a fundamental tool for vehicles’ energy consumption and emission analysis. Over the past decades, Vehicle Specific Power (VSP) has been adopted in a number of studies to estimate vehicles’ instantaneous driving power. Then, the relationship between driving power and fuel consumption is established as a fuel consumption model. However, this paper has discovered that driving power is not the only factor that indicates vehicles’ fuel consumption. Thus, this study proposes a new methodology for a fuel consumption model development based on fundamentals of hybrid powertrain operation characteristics, which aim to minimize error from the conventional modeling method. First, this study introduces a new driving power estimation equation calibrated for Toyota Prius generation 3. Then, Traction Force-Speed Based Fuel Consumption Model (TFS model) is proposed. By combining these two processes together, it provides a significant improvement on fuel consumption prediction error compared to the conventional VSP prediction method. The absolute maximum error was reduced from 57% to 23%, and more than 90% of the predictions fell inside the 95% confidential interval. In addition, the results show that the proposed model well captures the efficiency variation of the hybrid powertrain. This model is also applicable throughout a variety of real-world traffic and driving conditions.

Scopus

Proposal of Safe Driving Evaluation Method with Drive Recorder and Analysis of Elderly Driver Characteristics

Yonekawa Takashi, Tanaka Takahiro, Aoki Hirofumi, Yamagishi Misako, Yoshihara Yuki, Inagami Makoto, Fujikake Kazuhiro, Kinoshita Fumiya, Kanamori Hitoshi, Ninomiya Yoshiki, Suzuki Tatsuya

Transactions of Society of Automotive Engineers of Japan Vol. 49 ( 2 ) page： 384 - 389 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Society of Automotive Engineers of Japan

Recently, traffic accidents caused by elderly drivers have been increasing. It is thought that the reason of accidents is decline of driving skill caused by aging. In order to assist driving according to driving skill of elderly drivers, it is necessary to evaluate senior driver’s driving behavior. In this paper, using driving school instructor's driving as safe driving, the safe driving ability including elderly driver was evaluated by driving behavior at stop sign intersection measured by drive recorder. Using the evaluation method and criteria, relationship of elderly driver’s cognition, physical strength and driving behavior was studied.

DOI： 10.11351/jsaeronbun.49.384

CiNii Research

Investigation of Factors Affecting the Usability Evaluation of an Adaptive Cruise Control System

Maehigashi Akihiro, Miwa Kazuhisa, Aoki Hirofumi, Suzuki Tatsuya

ENGINEERING PSYCHOLOGY AND COGNITIVE ERGONOMICS (EPCE 2018) Vol. 10906 page： 445 - 456 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

In this study, we investigate the factors affecting the usability evaluation of an adaptive cruise control (ACC) system. In this experiment, the participants drove a Toyota Prius car with an ACC on a highway. We sampled 215 types of driving data recorded at a frequency of 60 Hz during driving. At each of the six designated stop points on the driving course, the participants stopped their cars and evaluated the usability of the ACC system by answering the usability questionnaire for automation systems. The participants’ driving styles were measured using the driving style questionnaire. The multiple regression analyses showed that the participants’ driving styles, the ACC’s driving control, and the participants’ intervention in the driving control of the ACC influenced the usability evaluation. The results were discussed in terms of the human–automation interactions and the design principles of an ACC.

DOI： 10.1007/978-3-319-91122-9_36

Web of Science

Scopus

Comparison of Subjective Evaluation of Different Forms of Driving Agents by Elderly People

FUJIKAKE Kazuhiro, TANAKA Takahiro, YONEKAWA Takashi, YAMAGISHI Misako, INAGAMI Makoto, KINOSHITA Fumiya, AOKI Hirofumi, KANAMORI Hitoshi

The Japanese Journal of Ergonomics Vol. 53 ( 6 ) page： 214 - 224 2017.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Ergonomics Society

<p>This study examined subjective assessments to clarify how agents for assistance with driving are accepted. The assessors were of various ages, including some who were elderly people. Three kinds of agents were assessed: voice, virtual and robot agents. The results showed that both the elderly people and people in other age groups positively assessed robot agents on the item ‘Familiarity’. The results also indicated that robot agents received lower assessments on the item ‘Obstruction’ than did voice or virtual agents. From these findings, robot agents are considered to be well accepted and tend not to cause hindrances. Moreover, the results changed after repeated use of agents, suggesting that continued use has an impact. Therefore, future directions for research include the following: differences in reception depending on differences in the types of robot agents, changes in assessments when agents are used over a long period of time, and changes in behaviors after driving with the assistance of agents.</p>

DOI： 10.5100/jje.53.214

CiNii Research

Effect of Mental Workload and Aging on Driver Distraction Based on the Involuntary Eye Movement

Son Le Anh, Hamada Hiroto, Inagami Makoto, Suzuki Tatsuya, Aoki Hirofumi

ADVANCES IN HUMAN ASPECTS OF TRANSPORTATION Vol. 484 page： 349 - 359 2017

Driver Agent for Encouraging Safe Driving Behavior for the Elderly

Tanaka Takahiro, Fujikake Kazuhiro, Yonekawa Takashi, Yamagishi Misako, Inagami Makoto, Kinoshita Fumiya, Aoki Hirofumi, Kanamori Hitoshi

PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON HUMAN AGENT INTERACTION (HAI'17) page： 71 - 79 2017

Development of an automated vehicle stop system for cardiac emergencies

Nguyen T.

Advances in Science, Technology and Engineering Systems Vol. 2 ( 3 ) page： 669 - 673 2017

The Effect of Visual Stimulus on Voluntary Eye Movement Based on a VOR/OKR Model

Anh Son Le, Inagami Makoto, Hamada Hiroto, Suzuki Tatsuya, Aoki Hirofumi

International Journal of Automotive Engineering Vol. 8 ( 2 ) page： 37 - 44 2017

Language：English Publishing type：Research paper (scientific journal) Publisher：Society of Automotive Engineers of Japan, INC

The main purpose of this study is to investigate the effect of visual stimulus on voluntary eye movement during driving. In this paper, we examine two cases: driving with/without visual stimulus by means of a driving simulator. We develop a model that consists of both vestibulo-ocular reflex (VOR) and optokinetic reflex (OKR) components. By comparing the observed eye movement and the simulation result of the model, the results of eye movement simulation was more accurate than VOR model only even in a naturalistic situation with optic flow of the visual scene and the driver’s voluntary eye movement.

DOI： 10.20485/jsaeijae.8.2_37

Scopus

CiNii Research

H6-1　Drive recorder data and its driving behavior for a year on middle and older drivers

YAMAGISHI Misako, YONEKAWA Takashi, TANAKA Takahiro, INAGAMI Makoto, SATO Toshihisa, AKAMATSU Motoyuki, AOKI Hirofumi

The Japanese Journal of Ergonomics Vol. 53 ( 1 ) page： S248 - S249 2017

Analysis of Relationship between Driving Behavior and Biofunction of Drivers including Elderly at Intersection with a Stop Sign

Tanaka Takahiro, Yonekawa Takashi, Aoki Hirofumi, Yamagishi Misako, Takahashi Issey, Inagami Makoto, Kanamori Hitoshi

Transactions of Society of Automotive Engineers of Japan Vol. 48 ( 1 ) page： 147 - 153 2017

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Society of Automotive Engineers of Japan

Traffic accidents on an intersection with a stop sign caused by elderly drivers have been increasing. The effect of changes associated with aging in physical functions and cognitive functions is pointed out as one of the reasons. In this paper, we conducted the experiment that the drivers including elderly go through or turn right at an intersection with a stop sign on different sight distances using a driving simulator, and analyzed the relationship between the collision rate, the behavior and the biofunction of the drivers.

DOI： 10.11351/jsaeronbun.48.147

CiNii Research

H7-3　Subjective evaluation of elderly people on driver assistance of driver-agents

Kazuhiro FUJIKAKE, Takahiro TANAKA, Takashi YONEKAWA, Misako YAMAGISHI, Makoto INAGAMI, Fumiya KINOSHITA, Hirofumi AOKI, Hitoshi KANAMORI

The Japanese Journal of Ergonomics Vol. 53 ( 1 ) page： S276 - S277 2017

A study on the relationship between robotic movement with animacy and visual attention of young children

Lee J., Aoki H., Stefanov D., Yamamoto T., Obinata G.

25th IEEE International Symposium on Robot and Human Interactive Communication, RO-MAN 2016 page： 682 - 687 2016.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：25th IEEE International Symposium on Robot and Human Interactive Communication, RO-MAN 2016

Socially assistive robots have been used successfully for improvement of communication skills of young children. Such robots need to attract children's attention and stimulate sustainable interactions. Many recent research studies propose various approaches for increasing of interaction effectiveness of such robots. In this study, we investigate the effect of robotic movements with animacy on the visual attention of young children. For the experiments, we used the TurtleBot robot. The effect of three different robot movement patterns were explored with the conducted tests: simple circle movement, inanimated movement, and animated movement. Thirty four children (21 males, 13 females, Mean of ages: 4.5) participated in an experiment. Results show that robot movement raises visual attention. Most of the children demonstrated increased interest toward animated robotic movement than simple motion. The animated movement that elicits much interest depends on children's age. The findings of this study contribute to effective use of interactive robots in education and therapy of young children and children with developmental disorder.

DOI： 10.1109/ROMAN.2016.7745192

Scopus

Automated safety vehicle stop system for cardiac emergencies

Takahashi I., Nguyen T.T., Kanamori H., Tanaka T., Kato S., Ninomiya Y., Takeuchi E., Nakagawa T., Makiguchi M., Aoki H.

2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies, EmergiTech 2016 page： 9 - 12 2016.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies, EmergiTech 2016

Cardiovascular disease (CVD) is a considerable risk factor of driving. The pain of cardiac events distracts driver's concentration, and ischemia brought by the CVD induces incapacity of driving. In this study, a prototype of the automated safety vehicle stop system has been developed. The system collects bio-signals through the steer-sensor and recognizes the driver's posture by a camera, and detects driver's incapacity. The system takes over the vehicle maneuver when the driver lost his capacity, and automatically drives to a safety spot by sensing the traffic environment. The system has been demonstrated in a prepared emergency scenario and verified the potential. This paper describes the concept and configuration of the system, and a future prospect of the study.

DOI： 10.1109/EmergiTech.2016.7737302

Scopus

An HMD-based assistance system for elderly drivers with visual impairments

Inagami Makoto, Aoki Hirofumi, Yonekawa Takashi, Ito Yasuki, Iwase Aiko, Terasaki Hiroko

INTERNATIONAL JOURNAL OF PSYCHOLOGY Vol. 51 page： 1145 - 1145 2016.7

The association between driving safety and mild cognitive impairment: Self-reported driving accidents and traffic violations by elderly people with normal cognition and mild cognitive impairment.

Kawano Naoko, Iwamoto Kunihiro, Kurashina Rie, Yamagishi Misako, Aoki Hirofumi, Kanamori Hitoshi, Ozaki Norio

INTERNATIONAL JOURNAL OF PSYCHOLOGY Vol. 51 page： 1144 - 1144 2016.7

Senior Drivers: How perception and cognition changes with aging affect driving behaviors?

Aoki Hirofumi

INTERNATIONAL JOURNAL OF PSYCHOLOGY Vol. 51 page： 1144 - 1144 2016.7

A Study on the Relationship between Robotic Movement with Animacy and Visual Attention of Young Children

Lee, J; Aoki, H; Stefanov, D; Yamamoto, T; Obinata, G

2016 25TH IEEE INTERNATIONAL SYMPOSIUM ON ROBOT AND HUMAN INTERACTIVE COMMUNICATION (RO-MAN) page： 682 - 687 2016

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Papers - AOKI Hirofumi