Toshitsugu Okayama

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MOTIVATION The DNA Data Bank of Japan (DDBJ) has developed a new DNA database system with a new schema design to accommodate rapid change and growth of requirements on the system. RESULTS The new schema and systems were created using an object-oriented design approach. The design was accomplished in accordance with ANSI/SPARC three-level schema(More)
In this study, starting with a newly introduced concept of data complexity ("empirical data complexity"), we specify the concept of complexity more concretely in relation to mathematical modeling and introduce "model-based complexity (MBC)". Inductive inference based on the minimum model-based complexity method is then applied to the reconstruction of(More)
In reconstruction of phylogenetic trees from molecular data, it has been pointed out that multifurcate phylogenetic trees are difficult to be correctly reconstructed by the conventional methods like maximum likelihood method(ML). In order to resolve this problem, we have been engaged in developing a new phylogenetic tree reconstruction method, based on the(More)
As the molecular biology has made a rapid progress these years, there has bee n a g r eat number of changes required of the methodology for maintaining and utilizing DNA sequence data. For example, annotation to sequences has become complex and extensive. DDBJ which recognized the impending requirements decided to develop a new DNA sequence database system(More)
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