Takuji SAKAI's research while affiliated with Nihon University and other places

Publications (18)

Article
This paper describes development of a train simulator for human factors, and application of functional near-infrared spectroscopy (fNIRS) to estimation of drivers’ brain activities during train operation. One of the characteristics of train operation is that the driving tasks tend to be more monotonous than automobile driving. Therefore, train driv...
Article
The railway accidents caused by human errors don't disappear at present. Decline of the train driver's arousal level has the possibility to cause it. The new type of operation support system to retain the arousal level should be necessary. We developed a new type of train simulator to analyze the human behavior of train driver. Outline of simulator...
Article
In orthodontics, by applying a correcting force to the target tooth using a brace, reaction occurs in the periodontal tissue at the root of the tooth and the tooth is moved. A tooth to be moved generates a reaction force around the cone of the tooth and produces stresses, but it is very difficult to know the 3 dimensional actual stress distribution...
Article
The use of the ultrasound-imaging platform in medical facilities has significantly increased in recent years due to its superior capability, namely high resolution, small influence to the human body and so on. Though the doctors diagnose a tissue characterization of a liver by observing an image obtained by ultrasound, a diagnostic result seems to...
Article
This paper describes design of active suspension system for Automated Guideway Transit (AGT) vehicles. The modeling of the AGT vehicles with single axle bogies is carried out first. The constructed vehicle model includes lateral transition, roll and yaw motion for vehicle body, front bogie and rear bogie, respectively. The dynamics of two kinds of...
Article
In this paper, dynamic simulation study of the running performance of the AGT vehicle with the single-axle bogies are described to show the characteristics of the single-axle bogie in realistic situation. The multi-body dynamics modeler, DADS, is used to build the dynamic model of AGT vehicle with single-axle bogies and this is used to demonstrate...
Article
Several methods are proposed for investigating the complex traffic flow. However, the dynamics of vehicle and the driver's characteristic, which are important factor for the traffic flow analysis, are not considered enough so far. This paper describes a new concept for simulating complex traffic flow by multiple agents. The agents are considered as...
Article
Several methods are proposed for investigating the complex traffic flow. However, the dynamics of vehicle and the driver's characteristic, which are important factor for the traffic flow analysis, are not considered enough so far. This paper describes a new concept for simulating complex traffic flow by multiagents. The agents are considered as a k...
Article
This paper describes malfunction of vehicle suspension by wavelet transform. Using two degree of freedom vertical vibration model of the rolling stock, the signal with the signal in which the amplitude changed was created. By the Wavelet transformation, it was tried that the weak and abnormal signal which is buried under the noise was detected. Acc...
Article
This paper describes design of active suspension system for Automated Guideway Transit (AGT) vehicles. The modeling of the AGT vehicles with single axle bogies is carried out first . The constructed vehicle model includes lateral transition, roll and yaw motion for vehicle body, front bogie and rear bogie, respectively. The dynamics of air cylinder...
Conference Paper
Several methods are proposed for investigating the complex traffic flow. However, the dynamics of vehicle and the driver's characteristic, which are important factor for the traffic flow analysis, are not considered enough so far. This paper describes a new concept for simulating complex traffic flow by multiple agents. The agents are considered as...

Citations

... The research on the state of the art technologies for brain imaging and sensing in the last few decades, has led to the development of various modalities to detect brain functions, such as Functional Magnetic Resonance Imaging (fMRI), Positron Emission Tomography (PET), Transcranial Doppler Sonography (TCDS) and functional Near-Infrared Spectroscopy (fNIRS). These modalities have been successfully used to monitor human vigilance level or cognitive state in static situations such as monitoring operator cognitive workload during air traffic control [8], train driving [9], car driving [10] and so on [11]. However, these modalities pose several limitations for the application of vigilance detection, specifically when discussing non-static situations. ...