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This paper details a new passive observation mode in ionospheric vertical sounding based on CADI ionosonde platform. The realization of the new observation mode not only alleviate the congestion problem of the ionospheric high frequency channel, but also provide a economical and effective method for the ionosphere monitoring and studying.
There has been a constant barrage of worms over the Internet during the recent past. To develop appropriate tools for thwarting quick spread of worms, researchers are trying to understand the behavior of the worm propagation with the aid of epidemiological models. In this paper a worm propagation model with quarantine strategy is presented and discussed based on the classical epidemic Kermack-Mckendrick...
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