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Effect of controlled O2 impurities on N2 afterglows of RF discharges
강남준,이민욱,André Ricard,오수기 한국물리학회 2012 Current Applied Physics Vol.12 No.6
A RF capacitive flowing discharge and post-discharge are experimentally studied in N2 gas and N2-(10-4-10-2)O2 gas mixtures by using the optical emission spectroscopy at a pressure of 8 Torr, a flow rate of 1 slm and a transmitted RF power of 100W. In these conditions the flowing discharge is distinguished by early and late afterglow. It is shown that the early afterglow is very sensitive to small quantity of O2. The band emissions from N2+(B) and N2(B,y') decreased sharply in the early afterglow when O2 is introduced before the plasma. By using simple gas kinetics for pseudo-stationary conditions in the afterglows, N2+ +O2 charge transfer and N2(a') quenching by O2 play key roles in the afterglow. The charge transfers and quenching reactions are amplified when O-atoms are produced in the plasma. It is also observed that the O-atoms are produced in the early afterglow when O2 is introduced after the plasma.
텔레비전 폭력물의 대응방향 : 미디어 감시운동 단체의 역할을 중심으로
강남준 한양대학교 사회과학대학 1999 社會科學論叢 Vol.18 No.-
Anti-TV violence movement initiated by media watch-dog groups is regraded as the most active civil movement in Korea. Like the anti-violence campaign in 1970s and 1980s in America, the movement was organized by a few woman activists and supporting volunteers. Since they did not have enough resources to run the full-fledged campaigns, their activities were mainly confined to monitoring television program's content. They partially succeeded in reducing the amounts of broadcasting violent TV program. But, like a cat-and-mouse game, broadcasters repeatedly re-introduce the violent programs whenever media activists loosened their grips. Thus, it is a time to discuss about what would be the next steps and directions to take in the movement. Based on the analysis of media activity groups' role in enacting Children's Television Act and Television Violence Act commissioned by Congress in early 1990s, three steps were recommended. First, the coalition with other concerned professional organization is required. Such organizations would be the nationwide parents' organizations, pediatric association, psychiatric association and other academic association interested in the effects of media violence on human behavior. Second, it is necessary to conduct efficient campaign to make anti-TV violence legislation. It is worth to know that the results of thousands of academic studies that continuously pointed the finger to TV violence as the prime culprit of juvenile violence did not play a major role in passing the Television Violence Act of 1990. Rather, the tenacious anti-violence campaign heralded by Peggy Charen's Action for Children's Television was the prime force behind the scene. Third, the media activity group must understand the role of mass media in triad relationships among audience, broadcasters and regulatory body.