S. Ishihara

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In this paper we propose Road-aware Skip Copy (RSC) method for distributing replicas of location-dependent data on server-less vehicular ad hoc networks in urban areas. In the RSC method, mobile nodes broadcast replicas of data item near intersections in order to distribute replicas to many nodes with small number of broadcasts, and it limits the number of(More)
In strongly correlated electron systems, enhanced fluctuations in the proximity of the ordered states of electronic degrees of freedom often induce anomalous electronic properties such as unconventional superconductivity. While spin fluctuations in the energy-momentum space have been studied widely using inelastic neutron scattering, other degrees of(More)
Photo-control of material properties on femto- (10(-15)) and pico- (10(-12)) second timescales at room temperature has been a long-sought goal of materials science. Here we demonstrate a unique ultrafast conversion between the metallic and insulating state and the emergence of a hidden insulating state by tuning the carrier coherence in a wide temperature(More)
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