Hiroki Takahara

Learn More
An emerging numerical method for simulating reactive flows in complex geometries, called the lattice Boltzmann method, is presented in combination with a concurrent visualization system. This combination enables an efficient simulation and visualization of time dependent transport and reaction processes such as the pollutant transport in porous media and(More)
UWB(Ultra Wide Band) is the communication scheme that information is transmitted using very wide frequency band width beyond several GHz. Due to the use of an impulsive signal to achieve very wide bandwidth transmission in UWB, it is also possible to achieve high precision ranging and positioning. Therefore, application of UWB is widely researched in ITS(More)
This paper discusses the IVC (Inter Vehicle Communication) system using the UWB (Ultra Wideband) radar. DSUWB (Direct Sequence - UWB) signal is used for this IVC system because it has CDMA (Code Division Multiple Access) Capability. However, there is the near-far problem due to difference of signal power from each vehicles, it becomes the cause of(More)
N-Acetyl-d-glucosamine branches were incorporated at the C-6 position of curdlan, a linear β-1,3-d-glucan, and the resulting nonnatural branched polysaccharides were evaluated in terms of the immunomodulation activities in comparison with lentinan, a β-1,3-d-glucan having d-glucose branches at C-6. To incorporate the amino sugar branches, we conducted a(More)
An efficient and easily implementable method is proposed for finding complete solution sets of piecewise-linear resistive circuits. In this method, a piecewise-linear resistive circuit is first described by a generalized linear complementarity problem, and then it is formulated as an integer programming problem. Then, it is solved by the integer programming(More)
In previous study, the IVC(Inter Vehicle Communication) system using the UWB(Ultra Wideband) radar was proposed. Proposed system able to simultaneously perform ranging and communication in same packet structure and transceiver. However, vehicle information to be transmitted is not determined, ranging accuracy of radar system and communication system have(More)
  • 1