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Kumano H.,Shinshu University | Hirata T.,Shinshu University | Hagiwara Y.,West Japan Railway Co. | Tamura F.,Shinshu University
International Journal of Refrigeration | Year: 2012

The effect of storage on flow and heat transfer characteristics of ice slurry was investigated experimentally. After ice slurry had been stored in the storage tank, variations in ice particle size were measured using a microscope, and diameter distribution and average diameter determined. The ice packing factor, Reynolds number and storage time were varied as experimental parameters. The pressure drop and heat transfer coefficient were measured when the ice slurry flowed in the horizontal tube. For laminar flow, the ratios of pipe friction and heat transfer coefficient decreased with storage time. For more than 12 h storage time, the ice slurry could not flow in the tube. The adhesion between ice particles seemed to cause a blockage in the tube. On the other hand, for turbulent flow, the pipe friction and ice slurry heat transfer coefficients were similar to that of the ethanol solution, and the storage effect was insignificant. © 2011 Elsevier Ltd and IIR. All rights reserved.


Fujino H.,West Japan Railway Company
Proceedings of the SICE Annual Conference | Year: 2012

The objective of this study is to examine why and how operators usually achieve a normal operational level. The author focuses on Threat and Error Management (TEM) in aviation as a key concept for finding an answer. Following this approach, the author conducted a participant observation of railway drivers and explored the above-stated question with reference to some of the behaviour he observed. The author uses a model to suggest that the daily routine by which operators achieve normal operation is guided by their own definitions of work and the negative emotions connected with those. It is further suggested that operators' definitions of work are regulated by their organisations' social environments and are intimately related to the satisfaction of the operators' needs for competence and relatedness. © 2012 SICE.


Yokoe T.,West Japan Railway Co.
Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C | Year: 2010

Railway drivers are trained the measures about various troubles faced during driving, and they can usually operate appropriately in the training. However, they can't meet an actual trouble calmly when they face it, so that they can take another mistake. As a part to examine support plan to prevent such an effect, we carried out a survey for all train drivers in our company, for example about their experiences and feelings in trouble caused by their own mistake or not, besides measures how they will manage an inexperienced trouble, and supports what they want to demand when they lost calmness.


Patent
West Japan Railway Company, Akuacom and University of Tokyo | Date: 2011-10-12

[OBJECT] To supply a method to detect omen of the derailment which is high precision and easy to apply to a vehicle. [SOLUTION] To detect a pitch angle velocity and a roll angle velocity of a running chassis by a sensor attached to the frame of a chassis, and determine a potential for derailment when the pitch angular velocity or multiplication value of the pitch angular velocity of the chassis is greater than the pre-set threshold, and when the roll angular velocity or multiplication value of the roll angular velocity of the chassis is greater than the pre-set threshold.


Patent
West Japan Railway Company and Kawasaki Jukogyo Kabushiki Kaisha | Date: 2012-02-01

A railcar 100 according to the present invention includes an underframe 1, a front surface frame 2 located at a front surface portion of a carbody 10 and having a lower end portion coupled to the underframe 1, and a buffer member 3 coupled to the front surface frame 2 and extending toward a vehicle interior side. Then, the buffer member 3 is provided at a position higher than the underframe 1.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and West Japan Railway Company | Date: 2010-03-25

A railcar that includes an underframe, a front surface frame located at a front surface portion of a carbody and having a lower end portion coupled to the underframe, and a buffer member coupled to the front surface frame and extending toward a vehicle interior side. Then, the buffer member is provided at a position higher than the underframe.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and West Japan Railway Company | Date: 2010-04-21

A bodyshell of a railcar includes side outside plates, end bodyshells, and guiding plates. The side outside plate are located at both end portions of a carbody in a vehicle width direction. The end bodyshell includes an end outside plate and a corner post. The end outside plates are located at both end portions of the carbody in the longitudinal direction. The corner posts are located at four corners of the carbody. The corner post is joined to the adjacent end outside plate and the adjacent side outside plate. The guiding plate is provided at the side outside plate so as to cover the corner post from a vehicle exterior. The guiding plate includes an inclined portion and a joining portion. The inclined portion is provided in front of the corner post and inclined to the rear side toward the side outside plate.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and West Japan Railway Company | Date: 2010-03-25

A bodyshell of a railcar includes side outside plates and end bodyshells. The side outside plates are respectively provided at both end portions of an underframe in a vehicle width direction. The end bodyshell includes end outside plates and corner posts. The end outside plates are respectively provided at front and rear end portions of the underframe. The corner posts are respectively provided at four corners of the underframe and are joined to the end outside plates and the side outside plates. Moreover, the corner post includes a side plate joining portion. The side plate joining portion overlaps a front end portion of the side outside plates from an outer side in the vehicle width direction and is joined to the side outside plate.


Patent
Akuacom, University of Tokyo and West Japan Railway Company | Date: 2016-04-13

The pitch angular velocity of a truck and the roll angular velocity of the truck which have been detected by an angular velocity sensor (5) provided in a train in order to detect the pitch angular velocity and roll angular velocity of the traveling train are stored in a memory (32), the predicted value of the roll angular velocity after a lapse of a predetermined time is calculated on the basis of the history of the roll angular velocity, when the pitch angular velocity of the truck, which has been detected by the angular velocity sensor, and the predicted value of the roll angular velocity exceed preset threshold values, respectively, a derailment sign of the train is determined, and when the derailment sign is determined, the derailment sign is reported to the outside.


Mito Y.,West Japan Railway Company
Rail Human Factors: Supporting Reliability, Safety and Cost Reduction | Year: 2013

West Japan Railway Company (hereafter we) introduced risk assessment as the axis of basic safety program that was started in April, 2008. It was a first attempt for the railway business operator, and we have been committed to risk assessment for some years since then, setting up "Establishment of the System for No Fatal and Injury Passenger Accidents and No Major Worker Injuries" as the goal. Therefore, safety level has been steadily improved through clarification of potential risk factors in all workplaces and implementation of risk reduction measures. This paper provides our vision and methodology for the establishment of safety management system in accordance with risk management. © 2013 Taylor & Francis Group, London, UK.

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