Curriculum Vitaes
Profile Information
- Affiliation
- Professor, Faculty of Science and Technology, Department of Engineering and Applied Sciences, Sophia University
- Degree
- 学士（工学）(上智大学)修士（工学）(上智大学)博士（工学）(上智大学)
- Researcher number
- 20431819
- J-GLOBAL ID
- 201301033397542820
- researchmap Member ID
- 7000004659
- External link
Research Areas
1Awards
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Sep, 2022
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Sep, 2022
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Sep, 2017
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Apr, 2010
Papers
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Scientific Reports, 16(1), Apr 2, 2026 Peer-reviewedCorresponding authorAbstract In the practice of medicine, tracheal intubation is a critical procedure, yet medical education often lacks quantitative instructional methods, relying instead on intuitive guidance from experts. This study used motion capture and eye tracking to analyze differences in movement and gaze between novices and experts during tracheal intubation. It also compared the use of direct and video laryngoscopes. Results showed that with a direct laryngoscope, experts directed their gaze farther than novices during the laryngoscope insertion phase, with a significant difference in eye-to-gaze distance [experts: 0.465 m; novices: 0.325 m; t (12) = 2.690, p = 0.020]. No significant difference was found when a video laryngoscope was used, suggesting that novices could perform expert gaze behavior. Head movement analysis revealed that experts maintained a greater distance from the mannequin’s mouth when using direct laryngoscopes (experts: 0.529 m; novices: 0.331 m). With video laryngoscopes, the gap narrowed (experts: 0.550 m; novices: 0.457 m). A t-test comparing novice head-to-mouth distance between device types showed a significant difference [t (14) = 4.355, p = 0.001]. These findings highlight how video laryngoscopes may help novices approximate expert behavior, offering potential for improved training methods.
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Transactions of the JSME (in Japanese), 92(954), Jan, 2026 Peer-reviewed
Misc.
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Mechanical Engineering Congress, Japan, 2011 "J102043-1"-"J102043-4", Sep 11, 2011Various vehicles are produced by the development of the industrial technology. The driver will take a different driving posture for vehicles of these various vehicles. Moreover, not only the driving posture but also driver become diversified because of increases of the senior citizen and female drivers. The combinations of the driving posture and drives become vast number. In the future, the system that can simulate various driving posture and physical characteristic to develop the vehicle is necessary. Then, the study develops postural evaluation system based on body mechanics simulation. In this paper, the introduction of the outline of the postural evaluation system and the consideration of the posture evaluation result are done.
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Dynamics and Design Conference, 2011(12) 386-389, Jun 28, 2011In this study, the biomechanical evaluation of electro-hybrid bicycle is performed. And we examine the influence of each muscle of the human body in electro-hybrid bicycle. The human body is modeled as musculo-skeletal model. In this research, the influence of electro assist is discussed by using numerical model. We performed the experiment of electro-hybrid bicycle. We discuss which muscles are important for pedaling motion. It is found that muscle activity is decreased by electro assist.
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日本機械学會誌, 114(1110) 329-329, May 5, 2011
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2010(19) "E2-1"-"E2-5", Jan 27, 2011With the increasing use of the International Space Station, humans have more opportunities to work in space. In space, a mobility device that operates efficiently is needed. In this research, a mobility system called the "Tether Space Mobility Device" (TSMD) is proposed. TSMD has a mechanism that enables the tether to move an object. In this study, the TSMD model is composed of two rigid bodies and one flexible body that can express motion with large deformation and large displacement. Several modeling of TSMD is performed. An influence on motion and control of TSMD is discussed.
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Dynamics & Design Conference, 2010 "511-1"-"511-6", Sep 14, 2010With the increasing use of the International Space Station, humans have more opportunities to work in space. In space, a mobility device that operates efficiently is needed. In this research, a mobility system called the "Tether Space Mobility Device" (TSMD) is proposed. TSMD has a mechanism that enables the tether to move an object. In this study, the TSMD model is composed of two rigid bodies and one flexible body that can express motion with large deformation and large displacement. Several modeling of TSMD is performed. An influence on motion and control of TSMD is discussed.
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Dynamics & Design Conference, 2010 "643-1"-"643-6", Sep 14, 2010A high energy-saving new small urban transport system "Eco-Ride" moves under potential energy and has merits of low initial costs and high flexibility to install. To improve the comfort and accessibility of Eco-Ride, a design evaluation method of passenger rooms has been proposed by combining the comfort and accessibility evaluation models for light rail vehicles and automobiles. The results of boarding experiments at full-scale Eco-ride mockup has been applied for the quantitative comparison of design layouts for passenger rooms of Eco-ride experimental trains. No statistically significant difference in comfort evaluation values of seats was found between the full-scale mockup and the manufactured experimental train about the experimented seat arrangement.
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Dynamics & Design Conference, 2010 "624-1"-"624-6", Sep 14, 2010In this study, we examine the influence of each muscle of the human body in vertical jump by modeling the human body and the muscle of the leg in detail. We discuss the muscles that are necessary for vertical jump with the numerical simulation result. Results show that vasti exerts the biggest power and gluteus maximus shows the highest state of normalized muscle activity. It can be conclude that muscle necessary for vertical jump is single articular muscles.
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Proceedings of the ... Asian Conference on Multibody Dynamics, 2010(5) "64424-1"-"64424-7", Aug 22, 2010With the increasing use of the International Space Station, humans have more opportunities to work in space. In space, a mobility device that operates efficiently is needed. But, some problems must be solved. First, the human body is suspended without the force of gravity. Second, the air cannot be polluted in the closed space of the Space Station. Thus, an air-polluting mobility device, such as a device with a gas jet using a thruster is objectionable. In this research, a mobility system called the "Tether Space Mobility Device" (TSMD) is proposed. In general, the tether is a cable or a wire rope. The tethers are expected to shift the orbit of another object without using a thruster and to move robots in space. TSMD has a mechanism that enables the tether to move an object. In this study, the TSMD model is composed of two rigid bodies and one flexible body that can express motion with large deformation and large displacement. Several modeling of TSMD is performed. An influence on motion and control of TSMD is discussed.
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Proceedings of International Symposium on Seed-up and Service Technology for Railway and Maglev Systems : STECH, 2009 "360736-1"-"360736-6", Jun 15, 2009Sensory evaluation of ride on a railway vehicle is performed based on international standards such as ISO2631. However, it is expected that this evaluation would be insufficient because of the development of technologies of a railway vehicle. The evaluation for sight and sound from the viewpoint of ergonomic and psychological perspectives might be needed as well as traditional evaluations in the future. Authors focused on the relation between sight and motion of the railway vehicle. The experiment in sensory evaluation of ride on a railway vehicle using a motion simulator was performed. In this paper, the way and results of the experiment and the environmental psychologic analysis are described.
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Proceedings of the conference on computational engineering and science, 14(2) 533-536, May, 2009
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The Transportation and Logistics Conference, 105-108, 2009Recently, the demand on an improvement of comfort in the automobiles has increased. When the car is considered as a room, the space planning of the seat arrangement influences the comfort greatly. In this research, the seat arrangement with rotating seat for improvement of passenger comfort is proposed. To rotate seat inside the room of the car can increase communication of passenger. To rotate seat outside the room of the car can produce private space. Therefore the comfort can be improved. In this paper, the sensory evaluation is performed. A biomedical measurement is performed in the car room. Therefore the effectiveness of seat arrangement with rotating seat for improvement of passenger comfort has been confirmed.
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Dynamics & Design Conference, 2008 "532-1"-"532-5", Sep 2, 2008This study presents dynamic behavior of a small size tire. A small size tire is used for personal mobility, for example, a bicycle, a wheelchair and so on. There are various steps and unevenness road in the actual traffic environment. The vibration is occurred when the small size tire passes a step or an evenness road. For the vehicle design, the force initiated by this vibration should be evaluated. In this study experiments are made using special device for behavior on bump for small size tire. Numerical model for small size tire is formulated by using mulitibody dynamics. In experiments, several types of step were used with various vehicle speeds. From measurements of tire, the acceleration acting on tire and the vertical displacement of tire, the effect of experimental condition were discussed. Furthermore numerical model is validated by experimental results.
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The Transportation and Logistics Conference, 2007(16) 107-110, Dec 12, 2007Sensory evaluation of ride on railway vehicle is performed based on international standards such as ISO2631. However, as technologies relating to railway vehicle progress, it is expected that this evaluation would be not enough. The evaluation for sight and sound from ergonomic and psychological perspectives might be needed as well as traditional evaluations from now. Authors focused on the relation between sight and motion of the railway vehicle, and made experiments in sensory evaluation of ride on railway vehicle using simulator, which is efficient in reproducing various situations by which patterns of images and motion are variously combined. In this paper, the way and results of experiment are described.
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The Transportation and Logistics Conference, 2007(16) 283-286, Dec 12, 2007This paper is concerned with a quantitative classification based on driver characteristics of steering maneuvers. The evaluation indexes that can be used for quantifying differences of driver groups such as experimental driver or beginner driver are proposed. The slalom test is performed in order to classify the driver's steering maneuvers using the driving simulator that has 6 degrees of freedom motion base and turntable. Effectiveness of proposed evaluation indexes is confirmed in both shape and area at radar chart It is demonstrated in this investigation that the method can be effectively used for classify an important characteristics of driver's steering maneuvers. The proposed evaluation indexes are verified by experimental test with 24 subjects.
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The Transportation and Logistics Conference, 2007(16) 203-206, Dec 12, 2007This study presents dynamic behavior of a small size tire. A small size tire is used for personal mobility, for example, a bicycle, a wheelchair and so on. There are various steps and unevenness road in the actual traffic environment. The vibration is occurred when the small size tire passes a step or an evenness road. For the vehicle design, the force initiated by this vibration should be evaluated. In this study experiments are made using special device for behavior on bump for small size tire. In experiments, several types of step were used with various vehicle speeds. From measurements of tire, the acceleration acting on tire and the vertical displacement of tire, the effect of experimental condition were discussed.
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The Transportation and Logistics Conference, 2007(16) 287-290, Dec 12, 2007This paper discusses comparison between beginner driver and expert driver. Because it is very important to develop effective driver assist system. We focus our attention on steering maneuver. We find there are three kinds of characteristics maneuver. First of all, it's the difference on steer angle. Beginner driver steers high furequency. On the other hand, expert driver steers smoothly. Next,we compared the location of grab on steering wheel. The beginner grabs limited place. They don't cross arm during cornering. Last difference we find is that female driver tends to pull steering wheel, it is significant to analyze according to develop new transducer. It enables the measurement of the six components forces for steering.
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TRANSLOG 2007, 151-154, 2007These days, a new vehicle, which is friendly for human and environment, is expected for the sustainable development in the moving space in the society. As one of the forms of the Personal Mobility Vehicles (PMV), the authors proposed a two-wheel vehicle which has two transformable modes; a two-wheel steering and two-wheel driving (2WS/2WD) bicycle and a stabilized parallel two-wheel vehicle. This study focused on the bicycle mode and its stability. It is known that the stability of bicycles is tuned by adjusting the bicycle parameters such as the tire diameter and the head angle. Variable rear steer angle is also effective to keep the stability. Since the vehicle is used in a narrow walking space at law speed, the other method for stability is considered. That is, the authors propose to stabilize the bicycle using driving forces generated at the front and the rear tires. The numerical simulations show that the proposed method is effective to stabilize the bicycle
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The Transportation and Logistics Conference, 2006(15) 205-208, Dec 13, 2006In this paper, we discuss the dynamic performance of a compact size bicycle using a developed multibody simulation model. These days compact and portable/foldable bicycles become widely used. The use of the transportation system alternative to automobiles attracts attention for the environmental issues. Furthermore, the use of such compact size bicycles as urban transportation systems has a potential to improve the convenience of public transportation systems. Generally, downsizing the bicycle and reducing diameter of tires are in tradeoff with the stability or controllability. For this reason, it is important to discuss the dynamic characteristics and the effect of the design parameters of such compact size bicycles. In this study, the effect of the following parameters on the dynamic performance of bicycles is discussed: mass of rear frame (including the mass of a rider), head angle and moment of inertia of a wheel. Those effects to the stability of a bicycle are analyzed by focusing on the diameter of tire and the running velocity.
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Journal of the Japan Society of Mechanical Engineers, 109(1057) 932-933, Dec 5, 2006
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Dynamics & Design Conference, 2006 "208-1"-"208-6", Aug 6, 2006In this paper, we discuss the dynamic performance of a compact size bicycle using a developed multibody simulation model. In this study, a three-dimensional multibody bicycle model is developed to account for the large rotational motion of the bicycle. The equations of motion for the constrained multibody system are obtained using the D'Alembert's principle. The dynamic performance of a compact size bicycle is discussed using the developed simulation model for several different conditions. In particular, the effect of the following parameters on the dynamic performance of bicycles is discussed: the diameter of a tire which becomes smaller when downsizing a bicycle; the offset and trail which are affected by the change in the diameter of a tire. The effect of such parameters on the dynamics characteristics of compact size bicycle is discussed for developing a compact and high-performance bicycle.
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Dynamics & Design Conference, 2005 "426-1"-"426-6", Aug 22, 2005In this paper we discuss the motion of a tethered system. We considered the tethered system consisting of a very flexible body (the tether) and rigid bodies at one end as our analytical model. A flexible body in planer motion is described using the Absolute Nodal Coordinate Formulation. The combination of flexible body motion and rigid body motion is performed and interaction between them is discussed. We performed experiments to investigate the fundamental motion of the tethered system and to evaluate the validity of the numerical formulation. We conducted experiment of the motion of the tethered system with a rigid body in microgravity space. The numerical solutions using the proposed methods for modeling and formulation for the tethered system are in good agreement with the experimental results.
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Proceedings of the Design Engineering Technical Congress 2003, 2003
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Proceedings ... International Conference on Motion and Vibration Control, 6(1) 490-495, 2002In this paper we discuss about dynamic response of a tethered system under attitude control of end body. The system in consideration is composed of a string and rigid bodies attached at its end. We formulate the motion of the string taking into its flexibility. We attempt to control the attitude of the end body. The control technique is consists of attitude control by the reaction wheel, attitude control by the joint torque, and attitude control by the reaction wheel with the joint torque control to cancel accumulation of angular momentum of reaction wheel. First eigenvalue analyses were carried out for these cases where control gain changes. Second the motions of the controlled system are discussed under the free vibration and forced vibration.
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The Computational Mechanics Conference, 2001(14) 139-140, Nov 27, 2001
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2001 96-96, Aug 3, 2001In this paper we discuss about motion and vibration of a tethered system. The system in consideration is composed of a string and rigid bodies attached at its end. We formulate the motion of the string taking into account large deformation, rotation and translation. The numerical simulations for the some cases of a string with rigid bodies and a string with a simple mass are performed. It is shown that we have to notice the interaction between the string deflection and the rigid bodies rotation.
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2000 259-259, Sep 1, 2000The formulation for motion of a string with large rotation and large displacement is discussed. It is assumed that the tension acting on a string is uniform and the gravity force acting on a string is ignored. The shape of the string in the planar motion is described by acting on a string is small by using Finite Element Method formulation on absolute nodal coordinate. Numerical simulation results in the two cases. One is the case that the string motion is coupled with large deformation and longitudinal vibration. Another one is the case that the end of the string is moved with large displacement.
Books and Other Publications
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Corona, Sep 10, 2007 (ISBN: 9784339044942)
Presentations
3Research Projects
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科学研究費助成事業 基盤研究(C), 日本学術振興会, Apr, 2017 - Mar, 2022
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2018
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公益信託 加藤辰次郎記念建築機械研究開発振興基金, Apr, 2017 - Mar, 2018
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公益財団法人 ＪＫＡ, Apr, 2017 - Mar, 2018
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2009 - 2010