Taking on the challenge for new public transportation services with an academic-industrial alliance, with unique ideas that break down stereotyped thinking
About three years ago, when Prof. Takefuji, who specializes in network security and neural network (information processing mechanism modeled on human brain structure) met with the president of JR East at a meeting, the two found themselves as kindred spirits as soon as they met. Prof. Takefuji revealed his research ideas related to railway services, such as the "electricity generating floor" and "transverse wave speaker", and an academic-industrial alliance was decided on at the spot. In cooperation with JR East Consultants Company, many projects are under way towards a railway service that is universally user-friendly.
"Electricity generating floor" enables passengers to generate electrical power at stations
At stations in the center of town, many people come and go. Can't this enoumous amount of transfer energy be used to generate electricity? Research of the "electricity generating floor" started from such a unique idea, and is based on the research by Kohei Hayamizu (1st year level at the the Graduate School of Media and Governance), Prof. Takefuji's student, to generate electrical power with sound wave and vibration. Kohei was only an elementary student when a science class led him to come up with the idea of using sound to generate electrical power, and started to study this seriously when he was in second year level at university.
The key technology of the "electricity generating floor", which generates electricity using vibration when someone steps on the floor, is piezoelectric element. The device, which charges electricity when pressure is applied and modifies when energized, has been used in piezoelectric speakers, but never to generate electricity. Therefore, a device with a higher power generating effeciency was co-developed with Kyocera specifically for this project. In October 2006, an experiment started at the Marunouchi North Gate of JR Tokyo station to test electricity generating power and durability. In the future, the plan is to supply electrical power for escalators and lights with the "electricity generating floor", aiming for environmentally-friendly railways and stations.
"Transverse wave speaker" can give clear sounds in noisy places
Sound waves and electromagnetic waves can be divided into two types, the longitudinal wave and transverse wave, depending on direction of the wave and its vibration direction. It has been widely understood that sound waves we normally hear are longitudinal waves, that come to our ear by vibration of air. However, electromagnetic waves that are transverse waves can also be recognized as "sound"----- Prof. Takefuji found out about "transverse wave speakers" through inventor Takeshi Teragaki in 2004. Moreover, transverse wave sounds had outstanding features such as "can be heard well in noisy places", "can be heard clearly even from far away", and "can be heard by people without eardrums". Soon, Prof. Takefuji started his own research on transverse wave speakers. Today, he is trying to develop a speaker that can be heard clearly to all passengers on noisy trains and in stations.
Highly accurate GPS system can be the only way to provide information to local unmanned stations
Surprisingly, in the past, there was no way to precisely keep track of the location of trains between stations, because people understood that using low-intesity waves of GPS for location measurement is not possible in and near trains. However, Prof. Takefuji proved in an experiment on the JR Chuo Honsen that by adding up radio waves that have cyclic patterns, GPS works inside trains. Since February 2006, an experimental operation of travel information service using PVT*, a highly accurate GPS system developed by the U.S. military, is underway at JR Hachiko line, which has many unmanned stations. By adopting this system, operational information and announcement of train arrival can be provided phonetically or visually, and can also be useful in times such as when trains are not on schedule.*PVT (Position, Velocity, Time)
Keio University Office of Communications and Public Relations firstname.lastname@example.org
Center for Research Promotion | ResearchSEA
Tool helps cities to plan electric bus routes, and calculate the benefits
09.01.2017 | International Institute for Applied Systems Analysis (IIASA)
Realistic training for extreme flight conditions
28.12.2016 | Technical University of Munich (TUM)
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
21.02.2017 | Earth Sciences
21.02.2017 | Medical Engineering
21.02.2017 | Trade Fair News