Ki-Eun Lee

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A top-k query returns k tuples with the highest (or the lowest) scores from a relation. Layer-based methods are the representative one for processing the top-k query. They construct i-th layer with the objects which can be the top-i, and answer the top-k queries by reading at most k layers. To construct layers, the existing methods used convex skyline,(More)
Recently, as the economy developed to provide abundant lifestyle, the importance of design is becoming more and more critical. However, even though color is important, users are feeling difficulty in choosing and using colors since learning about colors requires a lot of time to understand the basics as well as go through training. Thus, in this paper, we(More)
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