Kyu-Chul Lee

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MOTIVATION Protein-protein interactions play critical roles in biological processes, and many biologists try to find or to predict crucial information concerning these interactions. Before verifying interactions in biological laboratory work, validating them from previous research is necessary. Although many efforts have been made to create databases that(More)
We study the validation of XML documents when they are updated in XML databases. An XML document can be verified by checking against an XML Schema, which contains structure and type information of XML documents. However, most of XML database systems just validate the whole XML document, but can not validate parts of it. If updates are very frequent, then(More)
Recently, several researches have been performed for updating XML documents[1][2][12] stored in databases. These researches define update operations and resolve some semantic problems. However, because the update operations are usually validated after execution, conflicts can occur among them. Furthermore, in many studies for updating, they just validate(More)
In ubiquitous computing, clients should be able to use any kinds of services whenever and wherever they are. Service has the same quality without concerned with characteristics such as the status and location of services or devices. Because the characteristics are dynamically changed, a Sub-network is difficult to reflect all the changes. So, there are(More)
Due to the evolution of computer systems and the proliferation of Internet, numerous information resources have been constructed. The deluge of information makes the need to integrate informations, which are distributed on the Internet and handled in heterogeneous systems. Recently, most of the XML-based information integration systems use XML DTD (Document(More)