Byong Lee

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BACKGROUND Vitamin B12 is a fascinating molecule which acts as a co-factor in the metabolism of many organisms, especially affecting DNA synthesis and regulation, fatty acid synthesis and energy production. The synthesis of vitamin B12 is limited to a few of bacteria and archaea. Therefore, industrial microbial fermentation is used to meet annual demands(More)
Most network intruders tend to use stepping-stones to attack or to invade other hosts to reduce the risks of being discovered. There have been many approaches that were proposed to detect stepping-stone since 1995. One of those approaches proposed by A. Blum detects stepping-stone by checking if the difference between the number of the send packets of an(More)
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