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A View on three historical formations of popular culture in China Shin Hyunjoon Since 1990s 'popular culture' (or 'pop culture') in mainland China has exploded along with the expansion of market economy. Is this kind of popular culture just a recent phenomenon? When it is defined as broadly as 'beliefs and practices of ordinary people', it has existed in any formation in China before this period. This essay attempts to investigate three formations of popular culture in China, periods of which are divided into three: 'until seventies'; 'the Eighties (New Period)'; and 'from nineties (Post-New Period)'.
The latest attack type against network traffic appeared by worm and bot that are advanced in DDoS. It is difficult to detect them because they are diversified, intelligent, concealed and automated. The exisiting traffic analysis method using SNMP has a vulnerable problem; it considers normal P2P and other application program to be harmful traffic. It also has limitation that does not analyze advanced programs such as worm and bot to harmful traffic. Therefore, we analyzed harmful traffic out Protocol and Port analysis. We also classified traffic by protocol, well-known port, P2P port, existing attack port, and specification port, apply singularity weight to detect, and analyze attack availability. As a result of simulation, it is proved that it can effectively detect P2P application, worm, bot, and DDoS attack.
The untimely death of Shin Hae-chul (b. 1968) in 2014 is an incident whose full significance we have yet to grasp. After spending his teenager days as a rock kid in Dobong district of Seoul during the 1980s, shin became a succesful pop star in the late 1980s. Then he formed N.ex.T, one of the most influential rock bands in the mid-1990s. From then on, he also positioned himself as a spokesman of liberal politics through his critique of South Korean society. This paper traces Shin’s geographic mobility and decodes the meanings of different places in Seoul (Jongro, Yeouido, and Gangnam) and London where he had studied music. By examining his practices in different places, the paper highlights the moments of his struggles in popular music and beyond. Shin Hae-chul’s creativity lies in the communicative value and intensity of his performance.
This paper shows the study of preswirl duct as an effective energy saving devices that have been devised and reviewed to support the propeller performance, especially for the ship of VLCC with large block coefficients. From the bare hull wake measurements, typical upper/lower asymmetry of hull wake at the propeller disk was found. The 2kinds of pre-swirl duct, Unconventional half circular duct and Conventional circular pre-swirl duct have been designed and reviewed to recover the loss of propeller running in that condition. The general function of the pre-swirl duct was set to work against this asymmetry of wake and generate pre-swirled flow into the propeller against the propeller rotating direction. The optimum self propulsion tests with various angle configurations were carried out and the best configuration was decided. Accordingly, cavitation test was carried out with best configuration of unconventional half circular duct. The blade surface and tip vortex cavitation behaved smoother when the duct was mounted. The hull pressure amplitudes reflected this difference, so the hull pressure amplitude with duct was smaller than that of without duct.