Tadaaki Kirishima

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We have been developing a software development environment using the program diagram “Hichart”. In our research, we have implemented a graphical editor for Hichart. We add new features and capabilities to the editor, including calculation of a cyclomatic complexity and generation of SVG files for a given Hichart diagram. In this paper, we(More)
We investigated sets of conditions with respect to narrower drawing of tree-structured diagrams on an integral lattice. We found that under certain sets of conditions there are practical procedural algorithms for narrower drawing of tree-structured diagrams, while under other sets of conditions there are none. Based on our findings, we presented efficient(More)
Visualizing information has been one of the main subjects of study in the computer field. Representing objects with diagrams is one approach to visualizing information and its effectiveness has widely been recognized. Thus far, many graph-drawing algorithms have been proposed. Several authors have studied the problem of producing tidy drawings of binary(More)
We investigate sets of conditions with respect to narrower drawing of tree-structured diagrams on an integral lattice. We found that under certain sets of conditions there are practical procedural algorithms for narrower drawing of tree-structured diagrams, while under other sets of conditions there are none. Based on our findings, we present efficient(More)
Databases are mainly used in many systems in order to store data. Databases in large scale systems are difficult to grasp their logical structure, therefore, visualizing databases are quite important. To the present entity relationship diagrams (ER diagrams) have been proposed and used in designing and managing databases. However there are not so many tools(More)
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