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Noaki M.,Tokyo University of Science | Suzuki M.,Tokyu Corporation | Yamaguchi J.,Obayashi Corporation | Ohmiya Y.,Tokyo University of Science
Journal of Environmental Engineering (Japan) | Year: 2015

Experiments were conducted with the aim of elucidating the effect of differences in the ratio Af/Ah=φ of the combustible surface area Af to the horizontal projection area Ah of a combustible on the reduction in heat release rate from supplying with water. Wood cribs (wood species: Japanese cedar) where the surface area ratio Af/Ah=φ can be easily created by changing the number of layers of stacking used for the combustibles. The main experimental parameters were "number of layers of wood cribs," "water delivered density," and "water supplying start time. In the experimental results, regardless of the number of layers of wood cribs, the heat release rate per unit area ΔQ" that was reduced by supplying with water was proportional to the product of the water delivered density w and 1/φ (=Ah/Af). The constant of proportionality was virtually the same value (approximately 12.5 kJ/g in this experiment) for all water delivered densities and all numbers of layers of wood cribs. © 2015, Architectural Institute of Japan. All rights reserved.


Hosotani D.,Koito Industries LTD. | Hosotani D.,University of Tsukuba | Yoda I.,Japan Advanced Institute of Science and Technology | Yoda I.,University of Tsukuba | And 3 more authors.
IEEJ Transactions on Electronics, Information and Systems | Year: 2010

Many people are involved in accidents every year at railroad crossings, but there is no suitable sensor for detecting pedestrians. We are therefore developing a ubiquitous stereo vision based system for ensuring safety at railroad crossings. In this system, stereo cameras are installed at the corners and are pointed toward the center of the railroad crossing to monitor the passage of people. The system determines automatically and in real-time whether anyone or anything is inside the railroad crossing, and whether anyone remains in the crossing. The system can be configured to automatically switch over to a surveillance monitor or automatically connect to an emergency brake system in the event of trouble. We have developed an original stereovision device and installed the remote controlled experimental system applied human detection algorithm in the commercial railroad crossing. Then we store and analyze image data and tracking data throughout two years for standardization of system requirement specification. © 2010 The Institute of Electrical Engineers of Japan.


Fujikawa Y.,Tokyu Corporation
Japanese Railway Engineering | Year: 2012

Kaminoge station in the Tokyu Oimachi line is a station of about 21,000 passengers per day located in Setagaya ward, Tokyo. In accordance with the express operation commencement in the Oimachi line in March 2008, the rebuilding of the station has been carried out. In this article, we introduce the plan outline of Kaminoge station, which has a building concept of "station design for a regional contribution" through design and functional aspects.


Ito T.,Tokyu Corporation
Japanese Railway Engineering | Year: 2010

With increasing awareness of global environmental issues at home and abroad, environmental considerations in business activities have become fashionable for corporations as one of the social responsibilities that they must bear. In such a social condition, the company won Minister of Land, Infrastructure, Transport and Tourism Prize in No. 18 global environment grand prix. As for this, an action to the various environment consideration that we performed continuously was evaluated. This paper introduces the examples of architectural environmental considerations of Tokyu Corporation in stations and related facilities, including the actual measured value after their completion.


Patent
Tokyu Co. and Kabushiki Kaisha Toyota Jidoshokki | Date: 2012-11-13

A compressor includes a valve base plate, which is arranged between a suction chamber and a compression chamber and has a suction port. The valve base plate includes a sealing surface, a recessed groove, a receiving surface, and a support surface. The sealing surface is flush with a fixing surface and contacts the valve portion in an annular manner. The recessed groove is located at an outer side of the sealing surface and recessed with respect to the fixing surface. The recessed groove includes a bottom portion and separates an edge portion of the valve portion from the bottom portion. The receiving surface is flush with the fixing surface and capable of contacting a distal zone of the valve portion. The support surface is flush with the fixing surface and capable of contacting a middle zone located at an inner side of the sealing surface of the valve portion.

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