What if we can relocate convenience stores in accordance with fairness.

Convenience stores in Japan become more and more important not only in a normal time but also in a time of disaster. Therefore, locating convenience stores in accordance with fairness becomes very important to enhance safety of a region. In this article, we try to relocate convenience stores in Ueno, Tokyo as a trial experiment. There are 215 convenience stores in Ueno. Usually, we draw voronoi diagrams when estimating “sphere” of certain facility (convenience store), but note that we have to consider not “Euclidean distance” but “Network distance”. When we focus on one sphere and calculate min-sum point of this sphere, the location of convenience store is not correspond toRead More »

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What if we can cancel the restriction of one-way street in Kyoto?

Min-Max is a decision rule used in decision theory, game theory, statistics and for minimizing the possible loss for a worst case (maximum loss) scenario. The presence or absence of one-way street will affect on accessibilities of places. In this article, we will adopt this index to every intersections in Kyoto, assuming many situations including cancellation of restrictions of one-way street. Index of “min-max” is very important when we have to decide a location of emergence vehicle station, because this index means that how efficiently we can relief a person in disadvantage. The left side of figure3 shows distribution of one-way streets in Kyoto (red represents one-way, blue represents two-wayRead More »

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