Hsien-Cheng Chang

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Lithofacies identi®cation supplies qualitative information about rocks. Lithofacies represent rock textures and are important components of hydrocarbon reservoir description. Traditional techniques of lithofacies identi®cation from core data are costly and di€erent geologists may provide di€erent interpretations. In this paper, we present a lowcost(More)
BACKGROUND/PURPOSE The nationwide hepatitis B vaccination program in Taiwan was well known for its efficacy in reducing the carrier rate of hepatitis B and the morbidity and mortality of hepatitis B-related diseases among children. The aim of this study was to investigate the seroprevalence of hepatitis B 20 years after this program was implemented. (More)
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