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송기희,신재성 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.9
Removing radioactive contaminated metal materials is a vital task during the decommissioning of nuclear power plants to reduce the cost of the post-dismantling process. The laser decontamination technique has been recognized as a key tool for a successful dismantling process as it enables a remote operation in radioactive facilities. It also minimizes exposure of workers to hazardous materials and reduces secondary waste, increasing the environmental friendless of the post-dismantling processing. In this work, we present a thorough and efficient laser decontamination approach using a single-mode continuous-wave (CW) laser. We subjected stainless steels to a surface-removal process that repetitively exposes the laser to a confined region of ~75 mm at a high scanning rate of 10 m/s. We evaluate the decontamination performance by measuring the removal depth with a 3D scanning microscope and further investigate optimal removal conditions given practical parameters such as the laser power and scan properties. We successfully removed the metal surface to a depth of more than 40 mm with laser power of 300 W and ten scans, showing the potential to achieve an extremely high DF more than 1000 by simply increasing the number of scans and the laser power for the decontamination of primary circuits.
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송기희(Song Ki Hee) 한국식공간학회 2015 식공간연구 Vol.10 No.2
본 연구에서는 음식전시의 구성요소를 도출하고 전문가 설문을 통해 중요요소를 분석하였다. 음식이 갖는 매력요소와 더불어 식문화와 식공간의 중요성은 날로 부각돼 지역이나 국가를 홍보하는 매체로서 음식전시는 손쉽게 만날 수 있다. 최근에는 지역 특산물을 테마로 지역 홍보와 관광활성화를 목적으로 한 상설 음식전시관, 음식박물관이 증가하고 있는 추세이다. 김치박물관이나 한국차박물관, 전주전통술박물관을 비롯해 음식전시체험관과 음식박물관 등이 급증하고 있다. 그동안 전시관련 연구는 많지만 음식전시로 국한된 선행연구는 부족한 실정이다. 전시의 구성요소인 대상물과 공간, 관람객, 시간의 4대 기본요소에 음식만의 특성을 감안한 음식전시의 구성요소를 선행연구와 전문가 인터뷰를 통해 도출하였다. 전문가 설문을 통한 중요도 분석결과 대상물(Object)의 속성 중 전시주제의 선명성이나 음식 연출의 멋, 전시기획자와 음식전문가의 협업을 중요시한 반면, 뉴미디어에 의한 가상체험(3.49)이나 시식코너의 중요성은 상대적으로 낮게 나타났다. 음식전시에서 주목한 점은 시간의 항목에 전시물의 교체주기와 시기가 큰 비중을 차지했다. 위 분석 또한 전문가들이 생각하는 음식전시의 중요도를 파악해 음식주제관이나 음식 박물관의 전시를 구성해 고객 만족도를 높임과 동시에 지역 관광활성화에 기여하고자 한다. The importance of culinary culture and food space, as well as food attractiveness has been continuously emerged and it is not difficult to find the food display events which act as a media to promote certain nation or regions to the people. It is a current tendency that a permanent food exhibition and its related museum are increasing with a view to promoting regions and to vitalizing tourism based on the regional specialties. Recently there have been a lot of exhibition and experience space related to the theme of food, like Kimchi Experience Museum in Gwangju, Tea Museum in Boseong, and Traditional Wine Museum in Jeonju. With regard to the food display component analysis, it was very hard to find previous studies, which has been limited to broad concept of display or exhibition. The purpose of this study is to find the food display components deriving from the food characteristics by adopting the four basic elements of display/ exhibition as in objects, space, participants and time through the previous studies and interview with expert groups. This study will also contribute to enhancing satisfaction of participants and revitalizing regional tourism by reflecting ideas and suggestions from the expert group on the priority of food display from the four basic elements.
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이림,김용희,천병재,김택수,박승규,고광훈,송기희 한국광학회 2023 Current Optics and Photonics Vol.7 No.6
We analyzed the absorption spectra of acetone in the 3.37 µm mid-infrared range using the off-axis integrated cavity output spectroscopy technique to develop a real-time, in-line breath analysis device. The linear relationship between acetone concentration and absorption increase was confirmed as 0.32%/ ppm, indicating that the developed device allows for a quantitative analysis of acetone concentration in exhaled breath. To further confirm the feasibility of using our device for breath analysis, we measured the acetone concentration of human breath samples at the sub-ppm level.
ScienceON
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