Takayuki Hirasawa

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In this paper, we show the outline of our research on interactive traffic environment, under which we are developing mixed reality traffic experiment space. In order to develop sophisticated ITS applications, it is very important to analyze human factor, but there is few method to obtain human factor, thus, we have decided to create interactive traffic(More)
Adverse effects of an active fragment of parathyroid hormone (PTH(1 - 34)), a blood Ca(2+) level-regulating hormone, were examined using rat hippocampal slices in organotypic culture. Exposure of cultured slice preparations to 0.1 microM PTH(1 - 34) for 60 min resulted in a gradual increase in the intracellular Ca(2+) concentration ([Ca(2+)](i)); this(More)
The authors have been engaged in research and development of " AHS for smoother traffic " as countermeasures utilizing Advanced cruise-assist Highway System. As part of this work, they have reviewed a " Service to adjust lane utilization rates " which aims at reducing congestion, adjusting the balance of lane utilization by providing drivers with(More)
The actions of zinc on A-type potassium current (I(A)) were studied in dissociated bullfrog sympathetic neurons. Zinc (1-300 microM) caused a parallel shift in the activation and inactivation curves to a depolarizing direction, thereby enhancing I(A) around physiological resting potential. An EC50 value was 70-100 microM for these actions. The zinc actions(More)
We examined the effects of parathyroid hormone (PTH) on rat hippocampal neurons in culture to determine whether it caused a similar intracellular calcium concentration ([Ca2+]i) increase in these cells to that seen with renal epithelial cells and found that PTH induced the effect in about 30% of the neurons. The effects appeared gradually during continuous(More)
The effects of lanthanides (La(3+), Gd(3+), Lu(3+) and Sm(3+)) on voltage-dependent potassium currents were studied in dissociated bullfrog sympathetic neurons. A-type current (I(A)) and M-type current (I(M)) were blocked by lanthanides (0.1-30 microM) with I(M) being much less sensitive to these ions than I(A). The order of potency was Gd(3+)>/=Lu(3+)(More)
Whole-cell/voltage-clamp recordings were made from dissociated bullfrog sympathetic neurons to examine the channel blocking actions of barium (3-2000 microM) on an M-type potassium current (I(M)). Barium (IC(50) approximately 105 microM) blocked I(M) without affecting the 50%-activation voltage ( approximately -35 mV) and the slope factor ( approximately 11(More)
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