Yoshiaki Fukushima

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Advanced database systems have to support complex data structures as treated in object-oriented data models and nested relational data models. In particular, ecient processing of set-valued object retrieval (simply, set retrieval) is indispensable for such systems. In the previous paper [6], we proposed the use of signature les as ecient set retrieval(More)
It is difficult to predict future traffic precisely although it is assumed that the amount of future traffic is predictable in many researches on a multi-period planning for WDM networks. In this paper, we propose a wavelength routing algorithm that maximizes the number of accommodated lightpaths without precise prediction of future traffic demand. Since(More)
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