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TinyOS [1] is an open-source operating system, using Component Description Language NesC[2] for development. TinyOS is designed mostly for wireless sensor network, in which nodes have very limited resources. A representative scheduling mechanism in TinyOS is analyzed and its shortcomings are listed in this paper. An improved design of the priority-based(More)
As e-commerce is playing a more and more important role in our daily life, there is no wonder that significant attention is being focused on the evaluation of e-commerce Web sites in recent years. In this paper, a fuzzy analytic hierarchy process (FAHP) approach is used to evaluating e-commerce Web sites, which can tolerate vagueness and uncertainty of(More)
The high incidence rate of multiple carcinomas in the upper digestive tract is often explained in terms of involvement of the same underlying risk factors. It has been reported that the oral bacterium Streptococcus anginosus is associated with esophageal, gastric, and pharyngeal cancers. We previously reported occurrence of Porphyromonas gingivalis (P.(More)
Our studies investigating the existence of tumor-initiating cell (TIC) populations in human esophageal squamous cell carcinoma (ESCC) had identified a subpopulation of cells isolated from ESCC patient-derived tumor specimens marked by an ALDHbri+ phenotype bear stem cell-like features. Importantly, KDM4C, a histone demethylase was enhanced in ALDHbri+(More)
Ubiquitous is a Latin-derived word meaning "to exist at any time and place" likes water or air. In computing, the word "ubiquitous" indicates an environment in which users have access to networks without any limitation regarding computers, networks or places. Important issues in building Ubiquitous Korea (U-Korea) are the social problems appearing with a(More)
Implanting pieces of tissue or scaffolding material into the mammalian central nervous system (CNS) is wrought with difficulties surrounding the size of tools needed to conduct such implants and the ability to maintain the orientation and integrity of the constructs during and after their transplantation. Here, novel technology has been developed that(More)
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