Su Min Jang

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A rapid, sensitive, simple and accurate LC-MS/MS method for the simultaneous quantitation of caffeine, and its three primary metabolites, theobromine, paraxanthine, and theophylline, in rat plasma was developed and validated. Chromatographic separation was performed on an Agilent Poroshell 120 EC-C18 column using 1 μg/mL acetaminophen as an internal(More)
Skyline queries have recently received considerable attention in the searching service. The skyline of a set of n-dimensional points contains the points that are not dominated by any other point on all dimensions. The Skyline queries help users make intelligent decisions over complex data, where different and often conflicting criteria are considered. Many(More)
The skyline queries are often used in several recommendation applications. Most existing related works have focused on skyline computation in many multidimensional data. However, these works do not consider an interesting query generated from non-skyline point. In this paper, we propose a new query, called skyline minimum vector which finds the minimum(More)
In recent years, the information retrieval services on large-scale data in personal terminals have considerably increased. Many real end-users use a very small part in the large scale whole data for information retrieval. Furthermore, the reference frequencies of the used data are various according to end-user preference. However, the general indexes such(More)
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