Mitsuo Okada

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Gastric hyperplastic polyps are generally considered benign lesions, although rare cases of adenocarcinoma have been reported. Two cases of intramucosal adenocarcinoma originating from gastric hyperplastic polyps that were successfully removed by endoscopic mucosal resection or endoscopic submucosal dissection are reported. On pathological examination,(More)
In recent years, web services have become a new application over the open, complex internet. In that, web services security issues have become more and more important. But, there is no effective access control method to assure the web service security. This paper proposes a simple and effective formalization of concepts that have to be supported for(More)
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