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환원확산법(還元擴散法)에 의한 TiFe 수소 흡장합금의 제조에 관한 기초적 연구
권호영,주전아수,소천수 한국산업안전학회 1993 한국안전학회지 Vol.8 No.2
For comparison, we used Ca and Mg as reducers to produce TiFe hydrogen stroage alloy from Fe and TiO₂by the Reduction-Diffusion process. The results obtained were as follow : ① Ca was found to be effective both for reduction and diffusion processes. Moreover, Ca oxide was easily removed in an NH₄Cl solution after the reaction. ② In the case of using Ca as a reducer, the Reduction-Diffusion process is considered to take place in the folling three steps: First. TiO₂is reduced to Ti by Ca over 1000℃. Second, the atomic Ti drifts in the Ca melt and meets Fe particles. Finally, the atomic Ti diffuses in to the Fe particles. ③ In the case of using Mg as a reducer, We found that the reduction reaction of TiO₂went well. But the reduced Ti scarcely diffused into Fe particles. This was probably because no Mg melt was formed due to the high vapor pressure of Mg.
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권호영,이성일 한국산업안전학회 1991 한국안전학회지 Vol.6 No.3
The dielectric properties that effect to electric safety for unsaturated Polyester resin were studied over the temperature range of 30-40[℃] and the frequency range of 110~3 × 10^6 [㎐]. According to the results of the study, it has been observed that two kinds of dielectric losses in electric safety were existed by the molecular movement of C-H and OH group. When the radio of hardener was 1.5 [%], the characteristics of specimens were excellent in view of the electrical materical. In the range of measuring frequency the dielectric constants and the dielectric losses were 3.5∼5.5 and 10²∼10¹ respectly. The activation energy of loss spectrum in aspect of electric safety and the entropy appeared at the 30 [℃] were 33.4 [Kcal/mole] and 54.9 [㎈/mole-deg] respectly.
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고체탄소에 (固體炭素) 의한 철의 침탄기구에 (浸炭機構) 대한 연구
권호영,조통래,강세선 ( Ho Young Kwon,Tong Rae Cho,Sei Sun Kang ) 한국주조공학회 1988 한국주조공학회지 Vol.8 No.3
N/A The experiment was carried out for the purpose of studying the carburization of pure iron ingot and sintered iron powder by solid carbon in the atmosphere of CO gas. The volocity of carburization was estimaed by the diffusion coefficient D calculated by carburization equation. The results obtained were as follow: 1. The higher the carburization temperature, carburization depth and carbon concentration were increased, and the melting zone which had 2.8∼3.4%C at the 3∼4㎜ from interface of carburization was formed at 1300℃. 2. The main caxburization mechanism of pure iron ingot and the sintered iron powder were proceeded by CO gas up to 1100℃, solid carbon over than 1300℃, respectively. 3. The main carburization mechanism of pure iron ingot at 1200℃ was proceeded by solid carbon, and sintered iron powder was proceeded bs CO gas, however, in case the reaction time, the carburization was proceeded by solid carbon over than 5hrs. 4. The diffusion coefficient D of carbon were 0.559×10^(-6)㎠.sec^(-1) at 1100℃, 0.237×10^(-6)㎠.sec^(-1) at 1200℃, 0.087×10^(-6)㎠.sec^(-1) at 1300℃, in case of pure iron ingot carburized. 5. The diffusion coefficient D of carbon were 0.124 ㎠.sec^(-1) at 1100℃, 0.102 ㎠.sec^(-1) at 1200℃, 0.480×10^(-6)㎠.sec^(-1) at 1300℃, in the case of sintered iron carburized at the pressuring 4ton/㎠.
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권호영,조통래,권혁무 한국기술사회 1987 技術士 Vol.20 No.4
The experiment was carried out for the purpose of studying the carburization of pure iron ingot and sintered iron powder by solid carbon in the atmosphere of $N_2$ gas. The velocity of carburization was estimated by the diffusion coefficient D calculated by carburization equation. The results obtained were as follows ; 1. The briqueted sample of iron fine powder which made by higher pressure, carburization depth and carbon concentration were increased as much, and pure iron shelved the maximum value. 2, The higher the carburization temperature, carburization depth and carbon concentration were increased, and the melting zone which had 3.0~3.3%C at the interface of carburization was formed at 130$0^{\circ}C$. As the pure iron ingot was carburized, the diffusion coefficient D of carbon were 0.211$\times$$10^{-6}$$\textrm{cm}^2$ㆍsec$^{-1}$ at 120$0^{\circ}C$ and 0.391$\times$$10^{-6}$$\textrm{cm}^2$ㆍsec$^{-1}$ at 130$0^{\circ}C$, respectively. 4. As the sintered iron powder was carburized at the pressure of 4 ton/$\textrm{cm}^2$, the diffusion coefficient of carbon were 0.157$\times$$10^{-6}$$\textrm{cm}^2$ㆍsec$^{-1}$ at 120$0^{\circ}C$ and 0.103$\times$$10^{-5}$$\textrm{cm}^2$ㆍsec$^{-1}$ at 130$0^{\circ}C$, respectively.
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권호영,김달진 한국외국어대학교 국제커뮤니케이션연구소 2010 東西言路 Vol.28 No.-
최근 10여 년간 스타 배우와 스타 작가의 출연료와 원고료가 과다하게 인상되어 드라마 제작비가 지나치게 상승하였고, 동일한 배우가 반복 출연 하여 드라마가 식상하다는 지적도 받아왔다. 이 연구에서는 드라마에 참여 하는 PD, 작가, 출연배우 등의 인적자원들이 가진 스타파워가 드라마의 시 청률에 미치는 영향을 분석하였다. 1994년부터 2009년 8월까지 방송된 드 라마를 분석하여, ‘드라마에서 스타 파워가 존재하지만 반복 참여에 따라 그 효과가 감소한다’는 결과를 얻었다. 이 결과의 함의는 신규드라마 제작에 있어서 높은 시청률을 보장받기 위해서는 전작 또는 가까운 시기에 스타파워를 인정받은 인적자원을 활용 하는 것이 유리함을 보여주고 있다. 그리고 드라마 제작에서 참신하고 새 로운 이미지와 아이디어를 제공할 수 있는 다양한 인적자원을 발굴하고 활용하는 것이 중요하다. It is pointed out that payments for star actors and star writers have been excessively raised up over recent 10 years resulting in the excessive increase in drama production fees, and that the repeated appearances of same actors make dramas to be surfeits. This study analysed effects which star power of human resources such as PD, writers and actors involved in dramas had on viewer ratings. Through analysis on aired dramas from 1994 to August 2009, it gets a result that ‘there exists star power but effectiveness thereof has been lessened by repetitive participation.’ The implicature of this result is that utilizing human resources recognized as star power in the previous drama or during recent periods is advantageous to be guaranteed on high viewer ratings in production of new dramas. It is also important to discover and utilize various human resources that can provide with fresh and new images and ideas.
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