Qiuyun Shao

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There are at least four U.S. patents on software wa-termarking, and an idea for further advancing the state of the art was presented in 1999 by Collberg and Thom-borsen. The new idea is to embed a watermark in dynamic data structures, thereby protecting against many program-transformation attacks. Until now there have been no reports on practical experience(More)
Porphyromonas gingivalis is regarded as one of the risk factors of periodontitis. P. gingivalis exhibits a wide variety of genotypes. Many insertion sequences (ISs), located in their chromosomes, made P. gingivalis differentiate into virulent and avirulent strains. In this research, we investigated the prevalence of P. gingivalis in the gingival crevicular(More)
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