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한진석,장준경,이현철,Han, Jinseok,Jang, Junkyung,Lee, Hyun Chul 한국방사성폐기물학회 2020 방사성폐기물학회지 Vol.18 No.1
The Graphite Isotope Ratio Method (GIRM) can verify non-proliferation of nuclear weapon by estimating the total plutonium production in a graphite-moderated reactor. Using the reactor, plutonium is generated and accumulated through the <sup>238</sup>U neutron capture reaction, and impurities in the graphite are converted to nuclides due to the nuclear reaction. Therefore, the amount of plutonium production and concentration of the impurities are correlated. However, the plutonium production cannot be predicted using only the absolute concentration of the impurities. It can only be predicted when the initial concentration of the impurities is obtained because the concentration, at a certain time, depends on it. Nevertheless, the ratios of the isotopes in an element are known regardless of the impurity of an element in the graphite moderator. Thus, the correlation between the isotope ratio and amount of plutonium produced helps predict plutonium production in a graphite-moderated reactor. Boron, Lithium, Chlorine, Titanium, and Uranium are known as indicator elements in the GIRM. To assess whether the correlation between the indicator isotope and amount of plutonium produced is independent of the initial concentration of the impurities, four different impurity compositions of graphite were used. <sup>10</sup>B/<sup>11</sup>B, <sup>36</sup>Cl/<sup>35</sup>Cl, <sup>48</sup>Ti/<sup>49</sup>Ti, and <sup>235</sup>U/<sup>238</sup>U had a consistent correlation with the cumulative plutonium production, regardless of the initial impurity concentration of the graphite, because these isotopes were not generated through the nuclear reaction of other elements. On the other hand, the correlation between <sup>6</sup>Li/<sup>7</sup>Li and plutonium production depended on the initial concentration of the impurities in graphite. Although <sup>7</sup>Li can be produced through the neutron capture reaction of <sup>6</sup>Li, the (n, α) reaction of <sup>10</sup>B was the major source of <sup>7</sup>Li. Therefore, the initial concentration of <sup>10</sup>B affected the production of <sup>7</sup>Li, making Li unsuitable as an indicator element for the GIRM.
외식 프랜차이즈 주류 매장의 점포 혼잡성이 이용자의 지각된 가치와 재방문의도에 미치는 영향
한진석(Jinseok Han) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.5
본 연구는 외식 프랜차이즈 주류 매장의 점포 혼잡성이 이용자의 지각된 가치와 재방문의도에 미치는 영향을 분석하여 우리나라 외식 프랜차이즈 주류 매장 관리자에게 전략적인 시사점을 제공하고자 하였다. 본 연구는 서울·경기지역에 소재하고 있는 외식 프랜차이즈 주류 매장에 방문한 경험이 있는 고객 361명을 대상으로 설문조사를 실시하였고, AMOS 23.0과 SPSS 23.0 통계프로그램을 사용하여 자료를 분석하였다. 분석결과는 다음과 같다. 첫째, 외식 프랜차이즈 주류 매장의 점포 혼잡성이 지각된 가치에 미치는 영향을 실시한 결과, 매장의 점포가 혼잡할수록 고객들의 지각된 가치가 낮아지는 결과를 나타냈다. 둘째, 이용자의 지각된 가치가 재방문의도에 미치는 영향을 분석한 결과, 이용자의 지각된 가치가 높을수록 재방문의도도 높아지는 것으로 나타났다. 셋째, 지각된 가치의 매개효과를 실시한 결과, 인적혼잡성과 재방문의도 간의 관계에서 지각된 가치의 하위요인인 실용적 가치와 쾌락적 가치는 모두 매개효과를 나타냈다. 그러나 공간적 혼잡성과 재방문의도 간의 관계에서는 지각된 가치의 하위요인 중, 실용적 가치는 매개효과를 보인데 반해, 쾌락적 가치는 매개효과를 나타내지 않았다. 본 연구는 국내 외식 프랜차이즈 주류 매장에 대한 이론적 정립 및 실증적 연구로 제시하였다는데 의의가 있다. The purpose of this study is to analyze the influence of the crowdedness of dining franchise liquor shops on the perceived values and revisit intention. For this purpose, 361 customers who had visited dining franchise liquor shops located in Seoul and Gyeonggi-do areas were surveyed, and data was analyzed using AMOS 23.0 and SPSS 23.0 statistics programs. The analyses yielded the following findings. First, a higher level of crowdedness in the shop turned out to lower the perceived value of users. Second, a higher level of perceived value resulted in a higher level of revisit intent. Third, the analysis on the mediating effect of the perceived value showed that, in the relationship between the human crowdedness and revisit intention, both practical and hedonic values had mediating effects. However, in the relationship between the spatial crowdedness and the intent of revisit, the practical value had a mediating effect, while hedonic value did not exhibit such an effect. This study is meaningful in that it is presented as a theoretical establishment and an empirical study on dining franchise liquor shops.
박형규(Park, Hyungkyu),이재원(Lee, Jaewon),이우석(Lee, Wooseok),한진석(Han, Jinseok),구진회(Gu, Jinhoi) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.12
No matter how low it might be, noise from home appliances in indoor environment cause displeasure for residents as it is produced nearby. Electronic goods including vacuum cleaner and washing machine generate high frequency noise, which interrupts TV-watching or conversations and cause noises between floors in apartment houses. In particular, refrigerators make constant noise late at night, hampering the study for exams and causing sleeplessness. Korea, despite the government's efforts to promote low-noise goods based on the noise test by corporation, there is a lack of standardization in the test method, test condition and measuring equipments. This is a major reason that lowers the reliability of low-noise products. At present, low-noise home appliances are certified with eco labeling in the nation but, only 7 brands of refrigerators, 4 brands of washing machines and 97 brands of air-conditioners obtained certification as of august, 2011. In addition, none of Kimchi-refrigerator and vacuum cleaner brands were approved as low-noise home appliances. This shows Korea's relatively underdeveloped market for low-noise products, which, in part, is because of the difficulties companies face in being certified with eco labeling as they should satisfy various requirements such as power-saving and eco-friendly design besides low-noise features. As a result, low-noise labeling for home appliances should be established for the revised noise and vibration management law and the study was carried out to establish low-noise labeling system for major noise sources including vacuum cleaner, washing machine, air-conditioner and refrigerator.