Gyoyong Sohn

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In this paper, we survey the relationship between the similarity measure and dissimilarity measure for fuzzy sets. First, we design a similarity measure using a distance measure for fuzzy sets and prove its usefulness. From this result, we assert that the similarity between two complementary fuzzy sets satisfies the fuzzy entropy definition. We also show(More)
Issues about privacy-preserving data mining have emerged globally, but still the main problem is that non-sensitive information or unclassified data, one is able to infer sensitive information that is not supposed to be disclosed. Based on our previous paper [1], we employ PRBAC for privacy preserving data publishing (PPDP). Using an extended role based(More)
With advances in sensor techniques, much research is focused on USN (Ubiquitous Sensor Network) computing services and context analysis service is an important field among them. However, sensor stream data, which is generated from sensors used in many USN domain applications, is too fast to control each of them and the volume is too huge to store the whole(More)
1 Department of Mathematics, Donga-A University, Pusan 604-714, South Korea 2 Division of General Edu.-Math., Kwangwoon University, Seoul 139-701, South Korea 3 Department of Mathematics and Computer Science, Konkook University, Chungju 139-701, South Korea 4 Department of Mathematics, Kyungpook National University, Taegu 702-701, South Korea 5 Department(More)