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For a set S of n points in the plane, a Manhattan network on S is a geometric network G(S) such that, for each pair of points in S, G(S) contains a rectilinear path between them of length equal to their distance in the L1-metric. The minimum Manhattan network problem is a problem of finding a Manhattan network of minimum length. Gud-mundsson, Levcopoulos,(More)
A variety of services utilizing users' positions have become available because of rapid advances in Global Positioning System (GPS) technologies. Since location information may reveal private information, preserving location privacy has become a significant issue. We proposed a dummy-based method of anonymizing location to protect this privacy in our(More)
Recent studies suggest that action video game players exhibit superior performance in visuospatial cognitive tasks compared with non-game players. However, the neural basis underlying this visuospatial cognitive performance advantage remains largely unknown. The present human behavioral and imaging study compared gray matter volume in action video game(More)
This paper quantifies the procyclical effects of bank capital requirements in a general equilibrium model where financing of capital goods production is subject to an agency problem. At the center of this problem is the interaction between entrepreneurs' moral hazard and liquidity provision by banks as analyzed by Holmstrom and Tirole (1998). We impose(More)
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The views expressed in this paper are solely those of the authors and should not be interpreted as reflecting those of the Bank of Japan or the International Department. We thank our colleagues at the Bank of Japan for helpful comments. We are particularly indebted to Koichiro Kamada (Research and Statistics Department) for his valuable comments on the(More)
The majority of systemic sclerosis (SSc) patients have gastrointestinal tract involvement, but therapies of prokinetic agents are usually unsatisfactory. Patients are often compromised by the use of steroid; therefore, a surgical indication including fundoplication has been controversial. There is no report that advanced SSc with severe gastroesophageal(More)