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This paper presents a dynamic frequency scaling technique to save the processing power of MPEG-4 video decoder implemented in a portable kitchen TV, which is an ATSC/T-DMB supporting combo platform. The operating frequency of CPU is dynamically changed in accordance to the estimated processing burden of each video frame.

The polymer insulators have been extensively used as an alternate material of ceramic insulators.However, when they are used in practical conditions, there are many problems of decreasing performance and shortening lifetime due to the exposures of degradation factors applied from the outdoor situations. Accordingly, the analysis of polymer degradations has been getting influential too late as one of important subjects for improvements of safety and reliability. Heat, water treatments are arbitrary simulated for finding out the initiations and processes of surface degradation on the polymer surface. Especially, this study is focused on the chemical changes properties. From the analysis of hydrophilic and hydrophobic molecular structures, final modeling of surface degradation is accomplished. We checked the contact angle depending on heat and moisturized accelerated degradation and ran an XPS analysis to check the mechanism change of the surface of the PCB polymer composite. The surface that had a tendency to attract moisture showed a decrease in the contact angle and generated a large amount of carboxyl(-COO * ) radicals. The hydrophobized surface showed an increase in the contact angle and had a stable chemical composition constituted of the breakaway of oxygen radicals and the formation of double bond by carburization.

후 동년 11월 25일 까지 삼성서울병원 등 16개 병원에서 총 186명이 감염되어 38명이 사망하였다. 메르스 환자 186 명의 감염경로를 보면 4명 이상 메르스를 전파한 주요전파 자는 총 5명으로 최초 감염자인 1번 환자(28명), 14번 환자 (85명), 15번 환자(6명), 16번 환자(23명), 76번 환자(11명) 등 총 153명에게 전파시킨 것으로 나타났다. (1,2) Figure 1은 연도별 감염병 발생 추이이고, Table 1은 주요 유입 국가들 을 나타내고 있다. 이중 아시아가 84%를 차지한다. 메르스는 신종 인간 베타코로나바이러스(Coronavirus, CoV) 에서 야기된 바이러스 호흡기질환으로 "감염병의 예방 및 관리에 관한 법률" 제2조에 따른 '제4군 감염병(국내 새로